With the electric drivetrain system of the SLS AMG E-CELL, Mercedes-AMG GmbH is providing yet another glimpse of its latest development project. The drivetrain has been in development since 2010 as a result of the cooperation between Mercedes-AMG and Mercedes AMG High Performance Powertrains in Brixworth. Four synchronous electric motors located near the wheels, providing a peak output of 392 kW and torque of 880 Nm, help to provide the SLS AMG E-CELL with its exciting driving dynamics. The carbon-fibre transmission tunnel, which also serves as the monocoque housing for the high-voltage battery modules, is structurally integrated into the aluminium body shell and firmly bonded to it. The lightweight fibre composite materials have their origins in the world of Formula 1, among other areas.
A small series-production run of the Mercedes-Benz SLS AMG E-CELL is expected to be launched onto the market in 2013. The powerful and locally emission-free super sports car with electric drive is yet another example of the innovative strength and development competence of the AMG performance brand.
The ground-breaking drive system of the technology vehicle boasts some outstanding features: powerful traction is provided by four synchronous electric motors with a combined peak output of 392 kW and a maximum torque of 880 Nm. The four compact electric motors each achieve a maximum rotational speed of 12,000 rpm and are positioned close to the wheels. As a result, compared with wheel-hub motors, the unsprung masses are substantially reduced. One transmission per axle transmits the power.
Acceleration from zero to 100 km/h in 4 seconds
When it comes to dynamics, the electrically-powered SLS makes a statement: the gullwing model accelerates from zero to 100 km/h in 4 seconds – which almost puts it on the same high level as the SLS AMG with 6.3-litre V8 engine developing 420 kW (571 hp), which can accelerate to 100 km/h in 3.8 seconds.
Further exciting touches are provided courtesy of the agile accelerator response and the straight-line performance: unlike a combustion engine, torque build-up in an electric motor is instantaneous – maximum torque is available virtually from a standstill. The spontaneous torque build-up and confident power delivery – which does not suffer from any interruption of tractive power – are combined with engine running characteristics which are totally free of vibration.
The key data at a glance:
| SLS AMG E-CELL | |
| Max. output | 392 kW |
| Torque | 880 Nm |
| 0 – 100 km/h | 4.0 s |
| Energy content | 3 x 16 kWh = 48 kWh |
All-wheel drive with torque vectoring enables completely new levels of freedom
Four wheels, four motors – the intelligent and permanent all-wheel drive of the electric SLS guarantees driving dynamics at the highest level, while at the same time providing the best possible active safety. Optimum traction is therefore ensured, whatever the weather conditions. According to the AMG developers, “torque vectoring” involves the individual control of the electric motors, something which enables completely new levels of freedom to be achieved. Torque vectoring is permanently active and allows for selective distribution of forces for each individual wheel. The intelligent distribution of drive torque greatly benefits driving dynamics, handling, driving safety and ride comfort. Each individual wheel can be electrically driven and electrically braked, depending on the driving conditions, thus helping to
Torque vectoring enables optimum use of the adhesion potential between the tyres and the road surface in all driving conditions, thereby extending the critical limits of the vehicle’s driving dynamics.
Advanced technology from Formula 1: high-voltage lithium-ion battery
The SLS AMG E-CELL incorporates a liquid-cooled high-voltage lithium-ion battery featuring a modular design with an energy content of 48 kWh. Its development has made use of advanced technology from the world of Formula 1: the battery is the first result of the co-operation between Mercedes-AMG GmbH in Affalterbach and Mercedes AMG High Performance Powertrains (formerly Mercedes-Benz High Performance Engines). Headquartered in Brixworth, England, the company has been working closely with AMG for a number of years. F1 engine experts have benefited from its extensive expertise with the KERS hybrid concept, which made its debut in the 2009 Formula 1 season. At the Hungarian Grand Prix in 2009, Lewis Hamilton achieved the first historic victory for a Formula 1 vehicle featuring KERS hybrid technology in the form of the Mercedes-Benz KER System.
The high-voltage battery consists of 12 modules each comprising 72 lithium-ion polymer cells. This optimised arrangement of a total of 864 cells has benefits not only in terms of best use of the installation space, but also in terms of performance. The maximum electric load potential of the high-voltage battery is 480 kW, which is an absolute best value in the automotive sector. Another technical feature of this considerable performance is the intelligent parallel circuit of the individual battery modules – this also helps to maximise the safety, reliability and service life of the battery. As in Formula 1, the 400-volt battery is charged by means of targeted recuperation during braking whilst the car is being driven.
High-performance control as well as effective cooling of all components
A high-performance electronic control system converts the direct current from the high-voltage battery into three-phase alternating current which is required for the synchronous motors and regulates the energy flow for all operating conditions. Two low-temperature cooling circuits ensure that the four electric motors and the power electronics are maintained at an even operating temperature. A separate low-temperature circuit is responsible for cooling the high-voltage lithium-ion battery. In low external temperatures, the battery is quickly brought up to operating temperature with the aid of an electric heating element. This helps to preserve the overall service life of the battery. In extremely high external temperatures, the cooling circuit for the battery can be additionally boosted with the aid of the air conditioning system.
“AMG Lightweight Performance” design strategy
The trailblazing body shell structure of the SLS AMG E-CELL is part of the ambitious “AMG Lightweight Performance” design strategy. The battery is located within a carbon-fibre monocoque which forms an integral part of the body shell and acts as the gullwing model’s “spine”. The fibre composite materials have their roots in the world of Formula 1, among other areas. The advantages of carbon-fibre were exploited by the AMG engineers in the design of the monocoque. These include their high strength, which makes it possible to create extremely rigid structures in terms of torsion and bending, excellent crash performance and low weight. CFRP components are up to 50 percent lighter than comparable steel ones, yet retain the same level of stability. Compared with aluminium, the weight saving is still around 30 percent, while the material is considerably thinner. The weight advantages achieved through the carbon-fibre battery monocoque are reflected in the agility of the SLS AMG E-CELL and, in conjunction with the highly innovative wheel-selective four-wheel drive system, ensure true driving enjoyment.
The carbon-fibre battery monocoque is, in addition, conceived as a “zero intrusion cell” in order to meet the very highest expectations in terms of crash safety. It protects the battery modules inside the vehicle from deformation or damage in the event of a crash.
The basis for CFRP construction is provided by fine carbon fibres, ten times thinner than a human hair. A length of this innovative fibre reaching from here to the moon would weigh a mere 25 grams. Between 1000 and 24,000 of these fibres are used to form individual strands. Machines then weave and sew them into fibre mats several layers thick, which can be moulded into three-dimensional shapes. When injected with liquid synthetic resin, this hardens to give the desired structure its final shape and stability.
Through their experience with the SLR, the AMG Black Series vehicles and in motorsport, Mercedes-Benz and AMG have accumulated more than 10 years of expertise in working with carbon-fibre materials. AMG currently makes the propshaft for the SLS AMG, for example, in carbon-fibre. On the SLS Roadster, the supporting structure for the draught-stop is made as standard as a carbon sandwich structure. This component, with extremely short cycle times in an industrially oriented manufacturing process, already demonstrates what will be possible in the future.
Optimum weight distribution and low centre of gravity
The purely electric drive system was factored into the equation as early as the concept phase when the gullwing model was being developed. It is ideally packaged for the integration of the high-performance, zero-emission technology: by way of example, the four electric motors and the two transmissions can be positioned as close to the four wheels as possible and very low down in the vehicle. The same applies to the modular high-voltage battery. Advantages of this solution include the vehicle’s low centre of gravity and balanced weight distribution – ideal conditions for optimum handling, which the electrically-powered gullwing model shares with its petrol-driven sister model.
New front axle design with pushrod damper struts
The additional front-wheel drive called for a newly designed front axle: unlike the series production vehicle with AMG V8 engine, which has a double wishbone axle, the SLS AMG E-CELL features an independent multi-link suspension with pushrod damper struts. This is because the vertically-arranged damper struts in the series SLS had to make way for the additional drive shafts. As is usual in a wide variety of racing vehicles, horizontal damper struts are now used, which are operated via separate push rods and transfer levers.
Thanks to this sophisticated front-axle design, which has already been tried and tested in the world of motorsport, the agility and driving dynamics of the SLS AMG E-CELL attain the same high levels as the V8 variant. Another distinguishing feature is the speed-sensitive power steering with rack-and-pinion steering gear: the power assistance is implemented electrohydraulically rather than just hydraulically.
AMG ceramic composite brakes for perfect deceleration
The technology vehicle is slowed with the aid of AMG high-performance ceramic composite brakes, which boast extremely short stopping distances, a precise actuation point and outstanding fade resistance, even in extreme operating conditions. The over-sized discs – measuring 402 x 39 mm at the front and 360 x 32 mm at the rear – are made of carbon fibre-strengthened ceramic, feature an integral design all round and are connected to an aluminium bowl in a radially floating arrangement.
The ceramic brake discs are 40 percent lighter in weight than the conventional, grey cast iron brake discs. The reduction in unsprung masses not only improves handling dynamics and agility, but also ride comfort and tyre grip. The lower rotating masses at the front axle also ensure a more direct steering response – which is particularly noticeable when taking motorway bends at high speed. The ABS and ESP® systems have been adapted to match the special application spectrum of the permanent all-wheel drive.
Incredibly, 2012 is nearly upon us, and unlike the visions of the future dreamed up in the ’80’s, flying cars and routine jaunts around space have yet to materialize. One thing that’s getting closer, however, is the idea of charging electric cars while driving, minus a cable – at least that is where we see Daimler’s latest project heading.
Called inductive charging, the concept is relatively straightforward. An electric car is fitted with a special charging coil that then needs to be positioned over a charging coil in the ground, which will then automatically start the charging process without no need for cable contact.
“We are keen to find out how the inductive charging process proves in daily use,” says Herbert Kohler, head of e-drive & future mobility in the Research and Advance Development department at Daimler AG. “We have already demonstrated the essential feasibility of the technology. The experience in day-to-day use will now provide important pointers for the further course of development. A number of technical and financial issues also need to be resolved before we can really assess the marketability of this technology.”
The electric car will be deployed in March 2012 in the project “Effizienzhaus-Plus mit Elektromobilität”, which was inaugurated in Berlin Wednesday by Federal Chancellor Dr. Angela Merkel and Dr. Peter Ramsauer, Member of the Bundestag and Federal Minister of Transport, Building and Urban Affairs.
The “Effizienzhaus-Plus mit Elektromobilität” uses cutting-edge technology to create an energy-efficient house that will generate more electricity than it needs, leaving a surplus of energy behind. This surplus electricity can then be used to recharge battery-powered electric vehicles, in this case, the Mercedes-Benz A-Class E-CELL. In essence turing your home into your very own gas station – clearly BP will not be happy about this.
The entire building has been designed along energy-efficient lines, seamlessly incorporating the area of electric mobility. Both the inductive and the cable-based charging devices are harmonically integrated in the house’s architecture, for example. A family of four will live at the house on an experimental basis for 15 months, beginning in March 2012. During their stay at the house they will use various electric vehicles to explore and demonstrate how a new generation of buildings and electric mobility interact in daily life. Apart from the Mercedes-Benz A-Class E-CELL with inductive charging option, Daimler AG will be providing the “Effizienzhaus-Plus mit Elektromobilität” project from the start in March 2012 with two other battery-powered electric vehicles for around three months: the second-generation smart fortwo electric drive and the smart ebike. The family will thus have a broad spectrum of battery-powered local emission-free electric vehicles from Daimler at its disposal to cover the most diverse uses. From the two-seater tailored perfectly to urban needs through the 5-seater family car to the electric bike which opens the door to electric mobility without any need for a driving licence. Daimler will also attend to installation of the necessary charging infrastructure at the house, providing a wallbox for conductive charging with a cable and a charging coil for inductive charging in the carport. Alternatively, the family will also be able to charge all the vehicles at public charging stations or by plugging them into a standard domestic power outlet.
In the end, the project “Effizienzhaus-Plus mit Elektromobilität” will hopefully show that sustainable living and driving is possible without compromising on one’s quality of life. Scientific evaluation of the data on usage of the vehicle which are collected in the course of the project may additionally provide important insights into customers’ wishes – and show how electric cars can become yet more sustainable and at the same time more comfortable and convenient in the future.
Charging without a cable
In addition to charging with a cable, the Mercedes-Benz A-Class E-CELL to be deployed in this project can also be charged inductively. This involves non-contact transmission of the charging current by means of an electromagnetic field. For this purpose, both the vehicle and the parking space at the energy-efficient house are fitted with corresponding coils. A special display system helps the driver to manoeuvre the vehicle into the ideal position over the charging coil.
In cooperation with Conductix-Wampfler and Röchling Automotive KG, Daimler has already developed a prototype version of this technology and demonstrated its functional effectiveness in a project sponsored by the Federal Ministry of the Environment. The technology’s suitability for everyday use is now to be sounded out thoroughly in the course of the practical trial.
A perfect match: energy-efficient house and electric vehicle in coordinated design
In order to highlight the close functional relationship between house and vehicle, a special edition has been developed for the “Effizienzhaus-Plus” project in close consultation between the Mercedes-Benz Design department and “Effizienzhaus-Plus” architect Prof. Werner Sobek. In keeping with the design and colour concept for the house, white and natural tones are predominant in the exterior and interior design of the Mercedes-Benz A-Class E-CELL and the second-generation smart fortwo electric drive. A specially developed pearl coat in platinum white metallic lends the vehicles a strong presence and reflects heat, thereby helping to keep the interior cool. The combined use of natural textiles such as wool, linen and nappa leather provides for an attractive contrast.
The coordinated design means that the family will feel totally at home in the cars, thus communicating the concept of integrated sustainable home living and motoring on a visual and an emotional level.
The SLS AMG E-CELL body shell being shown by Mercedes-Benz AMG at the IAA 2011 is one trailblazing outcome of its ambitious “AMG Lightweight Performance” design strategy. Its key element is a transmission tunnel made out of lightweight carbon-fibre composite material (CFRP), which is structurally integrated into the aluminium body shell and firmly bonded with it. The high-strength and stiff CFRP component helps to reduce weight, while also serving as a monocoque housing for the battery modules.
The carbon-fiber battery monocoque in the SLS AMG E-CELL forms an integral part of the body shell and acts as the vehicle’s “spine”. The advantages of carbon composite materials were specifically exploited by the AMG engineers in its design. These include their high strength, which makes it possible to create extremely rigid structures in terms of torsion and bending, excellent crash performance and low weight. CFRP components are up to 50 percent lighter than comparable steel ones, yet retain the same level of stability. Compared with aluminium, the weight saving is still around 30 percent, while the material is considerably thinner. The advantages in terms of weight achieved through the carbon-fibre battery monocoque are reflected in the agility of the SLS AMG E-CELL and, in conjunction with the highly innovative wheel-selective four-wheel drive system, ensure true driving enjoyment.
The carbon-fiber battery monocoque is, in addition, conceived as a “zero intrusion cell” in order to meet the very highest expectations in terms of crash safety. It protects the battery modules inside the vehicle from deformation or damage in the event of a crash.
Tobias Moers, Member of the Board of Management of Mercedes-AMG GmbH, responsible for overall vehicle development: “AMG Lightweight Performance is the term we use at AMG to encompass all the different technologies involved in lightweight construction. The use of carbon makes vehicles not only lighter, but even more efficient and agile – in motorsports and on the streets. This is especially important for sports cars.”
The basis for CFRP construction is provided by fine carbon fibres, ten times thinner than a human hair. A length of this innovative fibre reaching from here to the moon would weigh a mere 25 grams. Between 1000 and 24,000 of these fibres are used to form individual strands. Machines then weave and sew them into fibre mats several layers thick, which can be moulded into three-dimensional shapes. When injected with liquid synthetic resin, this hardens to give the desired structure its final shape and stability.
Through their experience with the SLR, the vehicles in the AMG Black Series and in motorsport, Mercedes-Benz and AMG have accumulated more than 10 years of expertise in working with carbon-fibre materials. AMG currently makes the propshaft for the SLS AMG, for example, in carbon-fibre. On the SLS Roadster, the supporting structure for the draught-stop is made as standard as a carbon sandwich structure. This component, with extremely short cycle times in an industrially oriented manufacturing process, already demonstrates what will be possible in the future.
CFRP components also play an important role in Mercedes-Benz and AMG’s lightweight design strategy for the future. In conformity with the motto “the right material, in the right place, the proportion of high-strength steels, aluminium and fibre-reinforced plastics is set to increase significantly in the future. The body shell weight of all Mercedes-Benz vehicles should fall by ten percent compared with their predecessors.
Just how seriously Mercedes-Benz and its high-performance arm AMG are treating the issue of lightweight design as an important factor along the road to sustainable mobility, is demonstrated by the full-aluminium body shell of the SLS AMG. With it, the super sports model shows the way for future model ranges.
Mercedes-Benz unveiled their Concept B-Class E-Cell Plus at the Frankfurt International Motor Show for the press on Tuesday.
The Mercedes Concept B-Class E-Cell Plus has a total range of up to 600 kilometers and a range of up to 100 kilometers when in all-electric, local emission-free mode. Acceleration in the B-Class E-Cell Plus is a less then speedy sprint from 0 to 100 km/h in approximately 11 seconds and the top speed of 150 km/h. Though you won’t win any races both speeds are attainable in either operating mode making it extremely eco-friendly.
The above is made possible by the combination of a powerful electric drive generating a peak power output of 100 kW and a continuous output of 70 KW with a 50 kW petrol engine. The latter performs a dual role: at low vehicle speeds it charges the battery via a generator. At higher speeds it serves as a driving engine, acting on the front wheels together with the electric motor via a newly developed automatic transmission. The transmission is a newly developed automatic from Mercedes-Benz.
The Mercedes Concept B-Class E-Cell Plus meets Mercedes-Benz’s high standards in every respect. The vehicle combines compact exterior dimensions with a spacious and variable interior and luggage compartment. Five full-size seats make it an all-round electric car for the family, leisure and general motoring. The new electromechanical steering and enhanced driving dynamics provide for refined sportiness in the field of electric mobility.
Complete details can be found in the expanded press release below.
Daimler has today confirmed its plans to form a partnership with Robert Bosch GmbH to develop electric motors for a new generation of electric vehicles. If all goes well, production of the electric motors will begin production in early 2012. The motors will initially be used in Mercedes-Benz and smart electric cars starting in the later part of 2012.
Production of EV at BMW is not slated to begin until 2013, putting Mercedes far in front of the competition.
Specific vehicle details have yet to be released, but we expect the first vehicles to receive the electric motors will be the SLS AMG E-Cell and the A-Class E-Cell.
Press Release
Daimler AG and Robert Bosch GmbH plan to expand their long-standing partnership and cooperate in the development and production of electric motors for all-electric vehicles in Europe. The companies have signed a letter of intent and begun negotiations to establish a 50:50 joint venture that should be concluded in the first half of 2011.
Both companies aim, by bundling their competencies, to accelerate development advances in electric motors as well as to make accordant synergies accessible. According to their letter of intent, joint production should start in 2012. It is envisioned that the electric motors developed will be used in Mercedes-Benz and smart electric vehicles from 2012. Subsequent sales to other automakers are to be handled by Bosch. The joint activites will be located in the greater Stuttgart area and in Hildesheim.
The Bosch Group is a leading supplier of technology and services to the automotive sector. It has a high level of competence in developing and producing electric motors, which it is already manufacturing in series in Hildesheim.
The automotive manufacturer Daimler has built up 20 years of experience in the area of electric vehicles as well as their key components electric motor and battery, giving it a comprehensive understanding of how results can be best achieved in this field.
The new models presented by Mercedes-Benz at the first major European motor show of the automobile’s 125 anniversary year all have one thing in common – their sportiness. The C-Class Coupe, which is celebrating its world premiere, is just as remarkable as the new-generation C-Class sedan and station wagon for its driving fun and outstanding efficiency. In keeping with their sporty character, the new C-Class models were introduced by players from the women’s German national soccer team. A further highlight of this year’s “Geneva Salon” is the third iteration of the SLK, which redefines the roadster experience while consuming up to 25 percent less fuel than its predecessor. Making its debut on the eve of the show was the new top-of-the-range version of Mercedes’ bestselling model range – the C 63 AMG, which generates up to 358 kW (487 hp) and consumes around ten percent less fuel. The inventor of the automobile is also presenting the SLS AMG E-CELL, which makes its European motor show debut in Geneva.
The first “eye-catcher” at today’s Mercedes-Benz press conference was the Mercedes Simplex from 1902. The revolutionary design of the legendary sports car and its direct predecessor, the Mercedes 35 hp from 1901, defined the vehicle architecture that prevails throughout the auto industry to this day – a low center of gravity, long wheelbase and wide track are the basis for comfortable and sporty driving. It is in this tradition that the new Mercedes models make their debut in Geneva. “All our new models embody the cultivated sportiness that is anchored deep in our DNA”, said Dr. Dieter Zetsche, Chairman of the Board of Management of Daimler AG and Head of Mercedes-Benz Cars. “Every one of them delivers pure driving fun with exemplary efficiency – and none more so than the latest milestone in the 125-year history of the automobile, the SLS AMG E-CELL with battery-electric drive, which will arrive in our showrooms in 2013.”
The new C-Class Coupe – world premiere for third family member
Elegant design and an expressive character are what distinguish the new C‑Class Coupe, with which Mercedes-Benz is entering another new market segment in this, the 125th year of the company’s history. The youthful and sporty two-door, which celebrates its world premiere at the Geneva International Motor Show and makes its market debut in June, is the first classic coupe in the C-Class lineup. Dr. Joachim Schmidt, Member of Mercedes-Benz Cars Management responsible for Sales and Marketing said, “The new C‑Class Coupe is an individual and distinctive interpretation of our design philosophy.”
The newcomer boasts all of the same progressive technology as its extensively updated siblings. Here, too, the result is very clearly – pure driving fun matched with exemplary efficiency. It goes without saying that the elegant coupe is also equipped with a full range of technical highlights, including a host of assistance systems and new-generation telematics with internet access.
Market launch will see a choice of five modern direct-injection gasoline and diesel engines. The most fuel-efficient coupe version is the C 220 CDI BlueEFFICIENCY with manual six-speed transmission and ECO start/stop function as standard. The NEDC consumption of just 4.4 liters of diesel per 100 kilometers equates to 117 grams of CO2 per kilometer. The top engine version is the V6 gasoline engine in the C 350 BlueEFFICIENCY. It generates 225 kW (306 hp) and 370 Nm, yet consumes an average of only 6.8 liters/ 100 km. “With the expansion of the C-Class lineup, we are also consciously aiming at new customers,” said Dr. Schmidt. “The new model is youthful, stylish and dynamic. With it, we are offering an incredibly sporty entry into the world of Mercedes-Benz coupes.”
The new-generation C-Class – a bestseller in top shape
The new generation of the Mercedes-Benz C-Class has been extensively updated with more than 2,000 new parts and an innovative engine range. Following one of the most comprehensive mid-life facelifts in the history of the company, the bestselling vehicle in the current Mercedes-Benz product lineup has all the prerequisites to continue a unique success story – since its introduction three decades ago, sales of the C-Class and segment-founder the Mercedes-Benz 190 have topped 8.5 million units. Following model update, the new-generation sedan and station wagon have an even more dynamic and self-confident look. The interior has been extensively redesigned and is now presented in line with the Mercedes design philosophy of “Aesthetic Precision”. Premium materials and outstanding workmanship offer the perfect representation of the brand’s hallmark cultivated sportiness. A further innovation of the 2011 C-Class is the “COMAND Online” multimedia system with internet access.
Highly efficient direct-injection engines, the ECO start/stop function as standard and the 7G-TRONIC PLUS seven-speed automatic available for all engines make sure that dynamic driving fun comes together with the very best efficiency. It is with this high-tech package that the new-generation C-Class achieves consumption improvements compared with the preceding model of up to 31 percent. The equally outstanding safety also benefits from features such as ten new driver assistance systems carried over from the E and S-Class.
A further strength of the C-Class is its scope and variety. The already distinctive individualization program has been further expanded with a wider range of equipment options. And, with the new C-Class coupe, Mercedes-Benz is adding another member to the successful C-Class family.
The new SLK Roadster – the third chapter of a great success story
With the new SLK, the most successful sports car in its class is now entering its third iteration. The athletic two-seater with classic roadster proportions takes open-air driving fun to an all-new level. It unites light-footed athleticism with stylish comfort, distinctive sports car design with full everyday usability, top performance with exemplary ecology. The SLK also marks the world premiere of the panoramic vario-roof with MAGIC SKY CONTROL that can be switched light or dark at the touch of a button.
“With its countless technical innovations, the new SLK confirms its role as a trendsetter in the compact premium roadster segment that we founded with the first generation,” said Dr. Schmidt. Efficiency and spirit come together in the new four and six-cylinder engines with ECO start/stop function. They guarantee exceptional performance combined with up to 25 percent lower fuel consumption – a function, too, of the optimized 7G-TRONIC PLUS seven-speed automatic transmission, which is now available for all models. A unique range of safety equipment also underscores the leading position taken in its segment by the SLK.
Mercedes-Benz F-CELL World Drive – around the world with hydrogen
The “Mercedes-Benz F-CELL World Drive” that is currently underway with three fuel cell-driven B-Class F-CELL vehicles demonstrates that local zero-emissions electromobility is already ripe for series production at Mercedes-Benz. At the start of the Geneva Motor Show, the latest status was as follows – after around 3,600 kilometers through Europe, the World Drive participants are now on the road in the USA. The second major stage runs from Florida on the Atlantic coast right through the United States to California, before heading north along the Pacific coast all the way to Vancouver in Canada. The tour then takes to the air in Seattle, heading first for Australia then China. With the world tour that began on January 29, Mercedes-Benz is seeking to demonstrate the enormous potential of fuel cell technology and, in particular, to lobby for the establishment of a hydrogen fuel station network. “Our fuel cell electric cars are ready to roll. All that is missing is a hydrogen infrastructure,” said Zetsche.
Yet another premiere is being celebrated by the Mercedes-Benz Vito E-CELL. Hitting the streets outside of Germany is the first van with an electromotive drive system to be produced by a car manufacturer ex factory. As of today the first five vehicles are out and about on Spanish streets. The vehicles were handed over to the customer during a special ceremony at the Mercedes-Benz production location for the
Vito E-CELL in Vitoria. In the presence of Basque Prime Minister López, the Head of Production for Mercedes-Benz Vans, Dr Heinrich Weiss and Jose Luis Lopez-Schummer Trevino, President of Mercedes-Benz Spain, presented the five Mercedes-Benz Vito E-CELL vehicles to Augustine Markaide, President of the supermarket chain Eroski. “The Vito E-CELL, which is now fully integrated in our series production, represents a completely new phenomenon. As far as process management is concerned, all the hurdles were overcome in record time!”, commented Dr Heinrich Weiss as the official hand-over of the keys took place.
Emission-free vans are becoming increasingly widespread in everyday road traffic
Having been put to use so successfully in the conurbations of Berlin and Stuttgart, the Vito E-CELL is now set to prove its suitability for everyday applications in Spain. Thanks to the Vito E-CELL, electromotively driven – and thus locally zero-emission, not to mention virtually silent – vans are now a reality in the Basque Country’s streetscape. So the Basque Country is not just the production location for these electromotive vehicles – it is also their area of operation. Further customers in major European cities will be taking delivery of their Vito E-CELL vehicles over the coming months.
Vito E-CELL: full-function van for everyday operations
The Vito E-CELL is not an experimental vehicle – it is a full-function van for day-to-day applications. It is the first van of its kind to roll off the series-production line, just like any other Vito. In close consultation with its customers, Mercedes-Benz has implemented the prerequisites for an electromotively driven van: with a payload of around 900 kilograms plus a load compartment with no restrictions on use whatsoever the Vito E-CELL assumes all the usual transportation duties of any vehicle in its class.
Up-to-the-minute powertrain engineering, powerful lithium-ion batteries
The Vito E-CELL’s batteries are stored in a space-saving manner beneath the load-compartment floor. They are state-of-the-art lithium-ion batteries which are particularly powerful and have a high current capacity. They have an overall capacity of 36 kWh, sufficient for a range of some 130 kilometres. This means that the Vito E-CELL meets the average customer requirements for vans – around 50 to 80 kilometres per day – and still has a generous reserve.
The Vito E-CELL’s electric motor has an output of 60 kW and a torque of 280 Nm. As the full torque is available right from the start in the case of electric motors, the Vito E-CELL boasts a dynamic performance at the same high level as the latest diesel engines. Taking into consideration the Vito E-CELL’s usual area of operation and to facilitate the highest battery range possible, the van’s top speed is limited to 80 km/h.
Following on from the small series of 100 Mercedes-Benz Vito E-CELL vehicles which are now out and about in Berlin und Stuttgart, this ceremonial hand-over officially marks the start of the next series – encompassing over 2000 units.
Following the B-Class F-CELL fuel-cell car, Mercedes-Benz now introduces the new A-Class E-CELL as its second electric car built in series-production conditions. The five-seater with battery-powered electric drive meets all the requirements for a family car for everyday use. It is based on the five-door version of the current A-Class, and features a generously dimensioned interior and luggage compartment for maximum versatility. No compromises have been necessary in terms of space and variability, with compact storage batteries that are located extremely well-protected and in a space-saving way in the vehicle underbase. The car’s two high-efficiency lithium-ion batteries provide a range of over 200 km (NEDC). The car is powered by a quiet, locally emission-free electric drive with peak output of 70 kW (95 hp), developing a high torque of 290 Nm. A total production run of 500 A-Class E-CELL cars will be built at Rastatt from autumn 2010. The vehicles will be leased to selected customers in several European countries, including Germany, France and the Netherlands.
Five doors, five seats, the same luggage compartment volume as in the internal combustion engine A-Class (435 to 1370 litres), a 350-kilogram payload measured as per the relevant EC directive and high variability of the interior and luggage compartment: this is what makes the new A-Class E-CELL a family car for everyday use. The sophisticated sandwich structure provides both an extremely comfortable in-car environment and maximum protection for passengers and components in the event of a collision.
“Over our almost 125-year history, we have accumulated extensive experience and knowhow in the area of electric vehicles, including both battery and fuel-cell. This knowhow has already provided the basis for getting two electric cars for everyday use onto the road: the smart fortwo electric drive, and the B-Class F-CELL. The story now continues with our third electric car, the A-Class E-CELL., whose start of production is scheduled for autumn this year. The new car is a battery-driven electric Mercedes that enlarges our portfolio and offers our customers the kind of driving pleasure, comfort and safety that they have come to expect”, says Dr Thomas Weber, the Daimler AG Board of Management member responsible for Group Research and Development Mercedes-Benz Cars.
Driving pleasure with zero emissions
Along with exemplary safety, optimum comfort and a high level of suitability for daily use, the A-Class E-CELL also offers other strengths not always to be found in contemporary electric cars: agility and driving pleasure. The features are based on a low centre of gravity, partly the result of the installation of the batteries under the passenger compartment, in the “sandwich” structure of the vehicle floor. This gives the car excellent road-holding and sprightly handling characteristics – qualities that clearly set the A-Class E-CELL apart from other electric cars, which often have heavy and bulky storage batteries located in the boot or by the rear seat. Another benefit from this installation location is the provision of best-possible protection against the intrusion of structural components in the event of a head-on collision or impact from the rear. This is because the batteries are located outside the vehicle body’s deformation zones. The high-stability characteristics of the sandwich structure of the floor also provide outstanding protection for both battery and passengers in a lateral collision scenario.
High-performance electric drive with long range
The electric drive of the A-Class E-CELL is a permanent-field synchronous unit developing a peak output of 70 kW (95 hp), a continuous power rating of 50 kW (68 hp) and a high maximum torque of 290 Nm, as expected for an electric drive, available right from the first revolution. This makes the A-Class E-CELL an outstandingly assured and dynamic performer on the road, taking just 5.5 seconds to accelerate from zero to 60 km/h. A kick-down function is used to deliver maximum acceleration, according to the current charge level and battery temperature. Maximum speed is electronically set at 150 km/h.
The energy storage units are two high-performance lithium-ion batteries based on high-voltage technology. The advantages of lithium-ion batteries include their compact dimensions and significantly higher efficiency in comparison with nickel-metal-hydride (NiMH) batteries. They offer 30 percent more energy density than NiMH technology, and 50 percent more power density. Other benefits include high charging efficiency and a long service life. The combined energy capacity of the two lithium-ion batteries is a total of 36 kWh. With fully charged batteries, the A-Class E-CELL has a range of over 200 kilometres (NEDC).
Efficient battery cooling system
A special thermomanagement system keeps the high-voltage batteries cooled to within an optimum temperature window. The cooling system is based on a low-temperature cooling circuit. Fluid cooling with a water-glycol mixture ensures a stable operating temperature supporting the high degree of efficiency and the longevity of the energy storage. In very high ambient temperature conditions, the battery cooling system is boosted with the coolant circuit of the air-conditioning system. The electrical drive system and two on-board chargers are cooled with a high-temperature cooling circuit. This circuit keeps the units working at optimum operating temperatures, with maximum power delivery from the drive system. The car’s power electronics supply the 12-volt vehicle electrical system via a DC/DC converter with electric current from the high-voltage system. The electronics system also controls other functions such as the heating and air-conditioning systems in order to minimise the load placed on the battery for this purpose.
Flexible charging options
The batteries of the A-Class E-CELL can be either replenished at public charging points or plugged into an ordinary household power socket. A range of charging options are available, including single-phase 230-volt sockets, three-phase sockets in a household wall-box, and public recharging points. Using a single-phase 230-volt network, it takes around eight hours’ charging time to accumulate the energy required for a range of 100 km (NEDC). This time is reduced to just three hours in the case of charging from a wall-box or at a roadside recharging point.
Daimler and a number of other European automakers and energy utilities have agreed on standardised charging plugs and sockets, with an ultimate aim of worldwide standardisation. This makes the technology more customer-friendly, and is seen as a key prerequisite for the rapid spread of electric mobility.
Intelligent charging management
Like the smart fortwo electric drive in its category, the A-Class E-CELL is the world’s first vehicle in its class to be fitted with an intelligent charging management system based on “SmartCharge Communication”. Via the vehicle electronics system, all relevant information – such as the electricity supply contract identification data – is exchanged with the charging point. Benefits include a convenient, simple and totally reliable billing system.
Other intelligent features of the car include pre-start climate control. While the A-Class E-CELL batteries are being charged at home or at a roadside charging point, the interior can be pre-heated or cooled to a temperature set by the driver. Another function enables the driver to monitor charging progress and therefore the present range available, via the internet or a smartphone, for example.
The A-Class E-CELL electronics also provide for proactive control of the charging operation. So if the electric car is parked for a long period, recharging can be set to take place at times when electricity is cheaper, for example during the night. The intelligent interface in the A-Class E-CELL provides a range of billing, control and monitoring functions, making electric mobility convenient and safe, and therefore very customer-friendly. The vehicle is automatically immobilised on connection of the charging cable to the socket, preventing any possibility of driving off by mistake while charging is in progress. This makes the recharging operation even safer and more convenient for the user.
“Everything under control” when out on the road
To make vehicle handling and control as easy, safe and transparent as possible for the driver, the A-Class E-CELL has its own control and display concept specifically designed for the requirements of an electric car. The multifunction display in the vehicle shows the battery charge status, trip data such as kilometres driven, travelling time, average speed and average fuel consumption, along with the remaining range and residual electrical energy capacity (SoC = state of charge).
Another detail specific to the system is a display of the currently available drive power. Meanwhile, the rev counter normally to be found on the instrument panel is replaced with an indicator showing the instantaneous drive power demand or recovery power. Green, white and red-coloured segments show whether the drive system is currently operating in charge, economy or boost mode.
High-quality equipment typical for Mercedes
The new A-Class E-CELL also has plenty to offer in terms of Mercedes-quality equipment. Standard highlights in the premium quality “AVANTGARDE” version of this innovative electric car include bi-xenon headlamps, COMAND APS, an active park assist for automatic parking and the THERMOTRONIC automatic climate control system. A special additional function is the ability to preset the interior climate during charging, i.e. raising or lowering the compartment temperature according to the weather conditions. The car also has a comprehensive range of safety features, including rear window bags and sidebags, and sophisticated seating and lighting packages.
External features of this battery-powered electric car include the standard polar silver painted body and an “E-CELL” sign in silver lettering on the boot.
Highest safety standards
Mercedes-Benz applies the same high safety standards in the A-Class E-CELL as in all its other series-produced vehicles. The electric drive system has demonstrated readiness for series production in extensive practical testing programs. Key components have also been proven in Mercedes-Benz fuel-cell vehicles, for example, allowing Mercedes engineers to draw on the experience gained from more than 4.5 million test kilometres in everyday use. The integrated safety concept reflects the specific characteristics of the vehicle’s innovative drive system. The lithium-ion batteries and high-voltage system of the A-Class E-CELL are protected with a comprehensive safety concept:
An automatic drive disabler activated when the charging cable is connected prevents any possibility of the car being driven off by mistake.
Modular system for electric cars
In line with the strategy used for hybrid development, Mercedes engineers have also developed a modular system for electric vehicles with battery and fuel-cell. The benefits include the efficient use of shared parts in all the brand’s electric vehicles. All the key components of electric cars are appropriate for a modular approach – for example, the electric drive of the A-Class E-CELL is also used in the B-Class F-CELL. Both energy storage units in the electric A-Class are the same as the battery in the smart fortwo electric drive.
If you haven’t gotten enough of the recently announced Mercedes SLS AMG E-Cell, we’ve got a more comprehensive photo gallery of the electric model highlighting the neon Gullwing in all its unadulterated glory. We’re not going to go over the SLS E-Cell’s technical specifications again, as you can view a complete overview of the model in our prior article on the subject; but for those of you wishing to see more of the SLS AMG E-Cell, there should be plenty to keep you occupied. You can view the complete Mercedes SLS AMG E-Cell photo collection in the gallery below.
Last week we brought you the first look at the all new Mercedes-Benz SLS AMG E-Cell and now Mercedes has released a new video of the electric beast on the Atlanterhavsveien (also known as the Atlantic Road). The video is nearly ten minutes long and could be one of the quietest supercar videos ever.
Despite being battery powered, the Mercedes-Benz SLS AMG E-Cell only just fails to match the performance of its sibling that is fitted with a 6.3-litre V8 engine. With the single-speed transmission, the SLS AMG E-Cell does not go through gear changes and acceleration surges which will make the driver feel as if this is one of the fastest cars on the road.
In case you missed our previous post, the E-Cell features a lithium-ion polymer battery pack and electric motors which produce 392 kW (526 bhp / 533 PS) and 880 Nm (649 lb-ft) of torque. That is enough to propel the SLS AMG E-Cell from 0-62 mph in 4.0 seconds, compared to 3.8 seconds in the standard SLS.
Unique to the SLS AMG E-Cell is the new extended front apron, an extendable front splitter, a wider grille, LED headlights, and 19″ front and 20″ rear wheels. Inside is a radically redesigned center console that boasts a ten-inch touch screen infotainment system, capable of operating audio, climate, and navigation functions while also monitoring the flow of power from the four electric motors. If all of this is not enough to get you excited about the new Mercedes E-Cell, you also have the “AMG lumilectric magno paintwork”.
According to Dr Dieter Zetsche, Chairman of Daimler AG and head of Mercedes-Benz Cars, the SLS AMG is “set to become one of the most coveted sports cars of our time”.
We’ve known about the all-electric Mercedes SLS AMG E-Cell for quite some time now, as Mercedes detailed the model last July, but new specs, photos and video have all emerged demonstrating in greater depth what we can expect from the forthcoming electric supercar. The biggest question – performance – is said to be nearly that of the traditional SLS AMG, with with total output coming in at 526 horsepower and 649-pound-feet of torque thanks to the E-Cell’s four electric motors. That’s enough to propel the SLS AMG E-Cell from 0-62 mph in 4.0 seconds, compared to 3.8 seconds in the standard SLS.
Structurally, the SLS AMG E-Cell remains identical to that of the current SLS AMG, with no modifications made to the model’s aluminum spaceframe. The suspension, however, is a different story, as Mercedes engineers were forced to modify the suspension to accommodate the motors up front. As a result, the SLS E-Cell employs an independent multilink suspension with pushrod damper struts, whereas the non-electric SLS employs a double wishbone suspension setup. According to Mercedes, the two model’s handling should remain nearly identical. Providing stopping power, the SLS AMG E-Cell will come standard with the current SLS AMG’s optional ceramic brakes. In addition to helping the SLS E-Cell regenerate its battery charge during braking, they also provide ample stopping power, thanks to 18.5 inch rotors up front and 14.2 inch rotors in the rear, while still coming in 40 percent lighter than their non ceramic counterparts.
Of course, as with any electric vehicles, maintaining consistent heating and cooling is an integral part in the engineering of the SLS E-Cell. Helping maintain consistent temps in a variety of operating conditions, low temperature circuits cool as necessary, as does the air conditioning in extremely warm climates. In cold conditions, an electric heater brings the battery up to the correct operating temperature.
Other unique attributes of the SLS AMG E-Cell: first, there’s a new extended front apron featuring an extendable front splitter. In combination with the rear spoiler (that extends downward over 75 mph), air travels more quickly under the vehicle, reaching the more angled diffuser (possible due to the lack of exhaust) and thus creating more downforce. Inside, the driver can control the front splitter thanks to buttons on the new AMG Drive Unit, which also houses a start button, rear spoiler control and new park, reverse, and drive buttons. Another notable highlight of the new SLS E-Cell is the radically redesigned center console, which boasts a ten-inch touch screen infotainment system, capable of operating audio, climate, and navigation functions while also monitoring the flow of power from the four electric motors. And last but not least, who can miss the “AMG lumilectric magno” paintwork? I would have settled for a somewhat more subdued option, but for a prototype, you may as well have fun with it.
At this point, the Mercedes SLS AMG E-Cell is still in testing stages, meaning we still have some time to wait before the model enters production. When it does, it will likely be built in limited numbers, at least until consumers demonstrate they’re willing to forego gas in the high performance market. We’ll keep you posted as new details of the Mercedes-Benz SLS AMG E-Cell are released; in the meantime, you can check out photos and video of the model immediately below.
Mercedes-Benz delivered its 2.5 millionth compact vehicle to a customer in March 2010. “We’ve set the standards for premium compact vehicles with the A- and B-Class, and we plan to further exploit our outstanding position in this segment in the future,” said Dr. Joachim Schmidt, Head of Sales and Marketing Mercedes-Benz Cars. “We want to attract new customer groups and also achieve growth in additional markets with the successor generation in this segment.” Mercedes-Benz will expand its compact vehicle portfolio from two to four models starting at the end of 2011. The future models will offer product attributes that are already popular among A- and B-Class customers, such as the spacious interior. The brand will also set a new tone through the introduction of additional model variants and concepts.
Pioneer in alternative drives
With the A-Class E-CELL (production start in 2010) and B-Class F-CELL (production since 2009), Mercedes-Benz’ compact model series also makes the brand a pioneer in alternative drive systems. The A-Class E-CELL will initially be produced in a small batch of more than 500 units and then leased to selected customers for a period of four years. The model’s state-of-the-art lithium-ion battery enables a range of more than 200 kilometers, making the A-Class E-CELL, like all battery-electric vehicles, particularly suited for urban applications. The Mercedes-Benz B-Class F-CELL has an electric drive system that obtains energy from a fuel cell. The vehicle in effect carries its fuel on board, and with a range of approximately 400 kilometers it is suitable for both emission-free city driving and trips over longer distances. The first of the approximately 200 B-Class F-CELL models will be delivered to customers in Europe and the U.S. in 2010.
B-Class successfully launched in China
The A- and B-Class models are especially popular in European countries. Along with their home market, Germany, their most important sales markets include Italy and France. The B-Class has also gotten off to a successful start on the Chinese growth market, as 6,400 units have already been sold since the model was introduced to China at the beginning of 2009. The most popular B-Class engine variants worldwide are the B 180 and the B 180 CDI; the best-selling A-Class variants are the A 160 and the A 180. Cosmos Black and Polar Silver are the favorite colors of A- and B-Class customers, who also very much like the Active Park Assist system that has been available as an option since 2008.
New models in the production network
The next generation of the A- and B-Class will be produced in the Mercedes-Benz production network. The competence center for Mercedes-Benz compact vehicles is located at the Rastatt plant, which has been producing the A-Class since 1997 and the B-Class since 2005. Daimler AG is investing €600 million to expand production capacity at the facility. Construction of an additional production plant in Kecskemét, Hungary, for the Mercedes-Benz compact models has already begun, and the investment here totals €800 million.
The handover of the first smart fortwo electric drives to customers together with the official launch of the RWE electricity charging infrastructure introduces the next stage of electric mobility: As of today clean, intelligent and customer-friendly electric mobility is enabled by “e-mobility Berlin”. From public charging stations to RWE’s home charging stations – loading and paying for green electricity is now as easy as using a mobile phone. An intelligent charging management enabling a direct data exchange between the vehicle and the charging station forms the foundation for this. Customers receive a complete package containing the smart fortwo electric drive with intelligent charging management and a full service contract, an intelligent and fast RWE home charging station and free green electricity for the first 18 months. “e-mobility Berlin” makes electric mobility convenient, safe and manageable for every customer.
The first smart electric drives will be handed over in Berlin today. In line with a full service rental model the vehicles will be passed on to selected fleet, business and private customers. In the course of the project, the Berlin fleet will be completed by Mercedes-Benz A-Class E-CELL vehicles. Daimler will provide a total of more than 100 electric vehicles with battery from smart and Mercedes-Benz for “e-mobility Berlin” and will also service and maintain them.
“Our pioneering mobility concept offers an integrated solution which combines electric cars that are absolutely suitable for everyday use with an adjusted charging infrastructure. The smart fortwo electric drive is worldwide the first electric vehicle equipped with an intelligent charging management and the latest lithium-ion technology. It combines driving pleasure with an emission-free range of 135 kilometers – more than enough for daily use in urban areas. From today this sustainable and customer-friendly electric automobile will be an integral part of Berlin’s street picture”, says Dr. Dieter Zetsche, Daimler CEO and Head of Mercedes-Benz Cars.
RWE is providing the area-wide intelligent electricity charging infrastructure for “e-mobility Berlin” with around 500 electricity charging stations and is also responsible for the operation, supply of green electricity and central system control of the infrastructure. Dr. Jürgen Großmann, RWE CEO says “Only green electricity from renewable sources is being used for the “e-mobility Berlin” project. Thanks to our know-how as an electricity producer we bring climate protection to individual mobility through renewable energies. We are setting up a comprehensive system with an intelligent and user-friendly charging infrastructure that is suitable for quick everyday charging at home, work and in public areas. Our technology is already creating the basis for even more climate protection in future, especially the more efficient use of renewable energies.”
Rainer Brüderle, Federal Minister for Economics and Technology, affirms the federal government’s support for businesses’ climate protection efforts: “I have faith in the innovative strength of our industry and research institutions. To make sure Germany remains a leader in automotive technology in future, we need to work together across industries. This is the only way we will be able to solve the open questions of storage technology and infrastructure for electric mobility. The joint fleet project being undertaken by Daimler and RWE is an outstanding example of such cooperation. With substantial funding for research and development projects in the fields of transport, energy and information and communications technology, the federal government is supporting the development of market-ready products and hence raising Germany’s profile as a centre for innovation in these sectors. Starting in early 2010 the Joint Agency for Electric Mobility planned by the federal government will coordinate the implementation of the National Development Plan for Electric Mobility as central contact point for both businesses and the scientific community.”
Charging and paying: as easy as using a mobile phone
So electricity charging is even more convenient than filling up with petrol today. The preconditions are easy technical handling (“Plug & Charge”), the automatic exchange of information between the vehicle and the charging station during the charging process and a customer-friendly and safe billing system – as simple as for a mobile phone. In the framework of the “e-mobility Berlin” project customers conclude a contract for automotive electricity with RWE. The personal contract code (ID) is called up only once via the internet by the vehicle with the signing process familiar from online banking and saved in the RWE co-contractor billing system. When contact between the vehicle and the charging station has been established by the charging cable, the electronics on board the smart fortwo electric drive and the charging point enable all relevant information such as the identification data for the electricity contract to be exchanged with the electricity grid.
The charging process is only automatically activated when the personal ID is recognized. Among other things this enables a convenient, simple and – above all – secure billing at all times. Customers receive a single electricity bill from RWE regardless of where and from which charging station operator they get the electricity for their smart. This has the advantage for customers that they do not need to actively gain access, for example with a PIN or a credit card. At the same time data protection is guaranteed in all processes through the encryption and anonymisation of customer data. As a further function, drivers are able to monitor the status of the charging process and therefore the current range of their smart fortwo electric drive anywhere and at any time, for example via a smartphone such as an iPhone, a Blackberry or any PC with internet access. Drivers are also able to pre-air-condition their smart fortwo electric drive as long as their vehicle is being charged at home or at a charging station. No other car offers the comfortable options of pre-heating in winter and pre-cooling in summer.
The vehicle electronics also form the basis for features to be implemented in the smart fortwo electric drive and the A-Class E-CELL in future such as the possibility of actively controlling the charging process. For example, by retrieving the maximum available charging capacity and the corresponding electricity costs from the supplier whilst the vehicle is stationary. This enables the most economical charging strategy for the vehicle to be calculated. If the electric smart is parked for a longer period of time, the car can be recharged at times when there is a lower network load and therefore electricity is mostly available more cheaply, for example during the night.
With its various billing, control and monitoring functions the intelligent overall system of “vehicle and charging point” guarantees extremely customer-friendly electric mobility that is convenient and safe.
Full safety and individual online monitoring options via internet
Maximum safety for users is also guaranteed from a physical perspective: the plug and cable register whether charging point and vehicle connection are in perfect order and condition. Only then are the respective connections locked so that the electricity can flow. This means that there is practically no risk to the user through incorrect operation. There are no exposed electrical connections in the system and the cables are always de-energized when not in use. If the vehicle is connected to a charging station or home charging station customers have the individual possibilities to obtain information, to monitor or to control online. For example the current charging status can be called up online with a laptop or an internet-compatible mobile phone.
Pioneering solutions for a worldwide technology standard
In addition, further innovative technologies are used in the vehicle and the charging system. Together with 20 car manufacturers, suppliers and energy providers, RWE and Daimler have jointly developed a charging plug which shall be established as a standard throughout Europe. The target of all cooperation partners is to create a mandatory standard for charging interfaces for electric vehicles in Europe respectively worldwide. This global standardisation is an essential precondition for setting up a smoothly functioning as well as customer-friendly electricity charging infrastructure so that electric vehicles are accepted by customers and used across all vehicle classes in the long run. To standardise the communication interface between the vehicle and the charging station Daimler and RWE have also jointly developed a communication protocol that is available to third parties free of charge on the internet to enable them to develop their own products – in line with the open source idea. This should ensure that the communication protocol is constantly developed further – like the Unix operating system in the computer world – and not affected by industrial property rights.
Daimler – driving force for electric mobility that is innovative and suitable for everyday use
Within the initiative “e-mobility Berlin” Daimler is the first European car manufacturer to bring battery-driven electric vehicles that are suitable for everyday use to market in appreciable numbers. The smart fortwo electric drives to be applied in the Berlin project are part of an initial series of 1,000 vehicles. Production of these vehicles started at smart’s Hambach plant in mid-November. In the course of the next year the vehicles will take to the roads in a total of eight countries. In addition to Germany, smart fortwo electric drives will be handed over to customers in Italy, Spain, England, France and Switzerland. The market launch in the USA and Canada will start in the second half of 2010. Dr. Zetsche says “About ten years ago smart reinvented urban mobility. The second generation of our smart fortwo electric drive is the next milestone in the compact smart fortwo’s career which has been “green” right from the start. Volume production will start in 2012 and then the electric smart will be available to anyone interested.”
The electric drive of the intelligent two-seater convinces not only by being environmentally compatible and suitable for everyday use – but also by being fun to drive. The second generation surpasses its predecessor which has been successfully tested in London since 2007 in every respect, starting with the high range. With capacity of 16.5 kWh the highly efficient lithium-ion battery enables the vehicle to travel 135 kilometers – 30 percent more than before. The battery capacity can be charged from around 30 percent to around 80 percent in just three to four hours – that equates a distance of more than 100 kilometers. If a public charging station or the RWE home charging station is not available, the smart fortwo electric drive can also be charged at a normal household socket. The smart makes the emission-free electric drive an ideal alternative for urban mobility. A 30 kW electric motor is fitted at the rear and provides good acceleration with 120 Newton meters of torque immediately available from the start. Thanks to the no-shift electric drive it also guarantees high agility. The smart developers also attached great importance to the safety concept. The driver and passenger are seated above the impact zone and the battery is located between the side members, cross members and the two axles where it is also extremely well protected. This means that the full interior space is retained in the compact 2.7 meter smart.
RWE – pacemaker for an intelligent charging infrastructure
RWE is establishing and operating the charging infrastructure for “e-mobility Berlin”. 500 charging points are being successively set up in urban areas of Berlin. Parallel to this RWE is erecting publicly accessible charging stations in all large cities and metropolitan regions in Germany, for example on public roads, in APCOA multi-storey car parks and in front of all large ADAC offices. By the end of 2010 customers will find the first RWE automotive electricity charging stations in all large German cities. In addition, together with partners from public services, RWE is driving the comprehensive expansion of a charging infrastructure forward. RWE’s goal is flexible “refuelling” wherever cars are parked anyway – at home, work or on a shopping trip. This is how electric driving will become suitable for everyday use.
The charging stations for public operation and the RWE home charging stations are completely new developments. RWE attached great importance to safety, an attractive design and maximum user-friendliness. The central system control is also new. In future, it will enable even more efficient use of electricity from renewable energy sources and will compensate demand peaks in the grid – in line with the principle “Greater protection of the environment through innovation!”, as Jürgen Großmann says.
The RWE charging stations already deliver tomorrow’s technology today. They enable fast charging and have an assured charging capacity of 22 kW at RWE home charging stations and 44 kW at public charging stations. Compared with this, a normal household socket supplies a maximum of 3.7 kW.
Convenient, low cost and transparent electricity charging
With a consumption of just 12 kWh per 100 kilometers the smart fortwo electric drive represents the most economical and environmentally friendly way of driving a car in urban areas. An exemplary solution for driving locally emission-free into the future. Environmental zones with entry restrictions are increasingly being set up in many cities, from which electric cars with no emissions are exempt. In addition to possible state subsidies, for example the tax relief that buyers of electric cars are already entitled to in various European countries, this is a further way of reducing running costs. Furthermore, the energy costs are lower compared with fossil fuels. Within “e-mobility Berlin”, the green electricity from RWE is free for the first 18 months.
A couple days ago we told you about Mercedes’ potential plans to bring an electric-drive variant of the forthcoming Mercedes-Benz SLS AMG, and today, the company has confirmed exactly that. According to Mercedes, they are “developing an exciting super sports car with zero-emission high-tech drive,” one that “sees Mercedes-Benz and AMG displaying their expertise in the development of alternative drive solutions for high-performance super sports cars.”
If you viewed our prior story on the SLS eDrive, you already know most of the details: four electric motors (one positioned near each wheel) provide a combined peak output of 392kW and a maximum torque of 880 Nm, with one transmission per axle transmitting power. According to Mercedes, “this intelligent all-wheel-drive system allows dynamically optimized power transmission without any losses by means of Torque Vectoring – in other words, the specifically targeted acceleration of individual wheels.”
Powering the Mercedes SLS electric drive at present is a liquid-cooled 400-volt lithium-ion battery of modular design with an energy content of 48 kWh and a capacity of 40 Ah – one that is charged by means of targeted recuperation during braking whilst the car is being driven.
All of this translates into an electric SLS capable of accelerating from 0-62mph in around 4 seconds.
According to Volker Mornhinweg, Chief Executive Officer of Mercedes-AMG GmbH: “With the SLS AMG with electric drive, we wanted to redefine the super sports car. For us, it is not just about responsibility. We attach just as much importance to excitement and classic AMG performance.”
New details have emerged today of the forthcoming Mercedes-Benz SLS Gullwing: according to AMG boss Volker Mornhinweg, the company is currently developing a plug-in electric version of the model. The Mercedes SLS eDrive, as its being called, is expected to be offered with the same lightweight aluminum body as the standard SLS (a model that will see it debut in Frankfurt this September), along with an interior that again remains largely unchanged from the non-electric Gullwing.
According to Mornhinweg: “The great thing is we haven’t had to alter the styling in any way,” who added “it’s completely original in appearance.” Volker then went on to note that “The very nature of the SLS, with its sizeable engine bay, sturdy torque tube running back along the backbone of the car and the mounting point for fuel tank, lends itself perfectly to adaptation for electrification.”
In total, it’s being said the Mercedes SLS eDrive will boast 392kW and 649 lb-ft of torque – this compared to the standard SLS Gullwing’s 571 hp and 470 lb-ft. While performance figures haven’t been finalized, the company is aiming for a 0-62mph time of less than 4 seconds (standard SLS: 3.8 seconds) and a top speed of 120mph (standard SLS: 196mph). Range is between 93 and 112 miles, depending on the load placed on the battery, and the recharging time sits around five hours on high-density charge or eight hours on conventional power.
As for hardware changes, Mercedes engineers have taken the route of replacing the standard SLS’ double-wishbone suspension up front with a new pushrod front suspension – one that features coil-over dampers mounted horizontally – thus freeing up space around the front axle. It is here that Mercedes will place two 98-kilowatt motors (there’s also two 98-kilowatt motors on the rear axle), making the SLS eDrive a four wheel drive vehicle. Energy for these motors will be supplied via a lithium-ion battery, mounted in the space usually filled by the standard SLS’ torque tube.
Unfortunately, there is one caveat of the new Mercedes-Benz SLS eDrive: if you’ve got your checkbook handy ready to be first in line to procure one, you’ve got a while to wait. The SLS eDrive is tentatively set for production in 2015, so if you’re looking to fill an immediate need for an electric supercar, you’ll have to look elsewhere. On a side note, there are rumors Audi could be debuting and electric R8 in Frankfurt…
We will of course keep you posted as new details of the Mercedes SLS eDrive become available.