Bosch Describes Role in EV Transition

Company is involved in development and manufacture of electric drive technologies and components.

Published: 23-Aug-2011

UXBRIDGE, UNITED KINGDOM: An innovative supplier with a 125year history, Bosch is playing a decisive role in paving the way to electromobility. Technologies, components, and systems for electrical drives are now being developed under the double-armature brand, and in some cases already being manufactured. At the Bosch location in Hildesheim, for example, efficient electric motors are being made – for hybrid vehicles and, in a joint venture with Daimler, for electric vehicles. Series production of power electronics components has started in Reutlingen, and SB LiMotive, our joint venture with Samsung SDI, has been producing lithium-ion cells for electric vehicle batteries in Ulsan, South Korea, since 2010. Some 400 million euros goes into the electrification of automotive drives each year, with 800 Bosch associates around the world working on this issue that is so crucial for the future of mobility. Out of a global total of some 103 million newly produced vehicles in 2020, Bosch expects to see some three million electric vehicles and plug-in hybrids, as well as roughly six million hybrid cars. From 2025, electrically driven vehicles will become an increasingly common sight on the world’s roads.

Bosch systems competence as a success factor
As we move toward the all-electric car, hybrid technology in its various forms is an important transitional technology. Bosch is currently focusing on two full hybrid designs that make it possible to travel short distances using purely electrical power: the parallel full hybrid and the axle-split hybrid. Both designs support internal-combustion engines in certain driving situations by way of a boost function. This enables the downsizing of spark-ignition and diesel engines. On the basis of present technology, this means that consumption and CO2 emissions can be reduced by between 25 and 30 percent, without any further changes to the engine itself. In the parallel full hybrid, the electric motor is integrated into the powertrain between the internal-combustion engine and the transmission. The axle-split hybrid features an internal-combustion engine on the front axle and an electrical drive for the rear axle. The positive side-effect of this configuration is four-wheel drive.

Bosch’s systems competence is the basis for controlling the complex interplay of internal-combustion engine, electric motor, and clutch, which results in additional benefits such as coasting and boosting. Coasting means that the internal-combustion engine is stopped and the vehicle coasts along without burning fuel. All safety and comfort systems continue to be fully operational. Boosting is when the internal-combustion engine is briefly supported by the electric motor when there is a need for extra power – when overtaking, for example. Bosch has been supplying the parallel full hybrid technology for the Porsche Cayenne and the Volkswagen Touareg since 2010, and now also for the Porsche Panamera. This year PSA will launch the Peugeot 3008 HYbrid4, the world’s first diesel hybrid, which features Bosch’s innovative axle-split hybrid technology. By 2013, Bosch will have started series production of core components such as electric motors, power electronics, and battery technology for 12 automakers in 20 different projects. Daimler AG and Robert Bosch GmbH are also working to set up a joint venture that will develop and manufacture electric motors. Called EM-motive GmbH, it will supply traction machines for Mercedes-Benz and smart electric vehicles from 2012. Bosch will be responsible for sales of these motors to other automakers.

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