Bosch launches new compact electric drive module for light commercial vehicles; makes its debut at Daimler Truck

Bosch begins series production of a new drive unit consisting of an electric motor and an integrated inverter for light commercial vehicles. The inverter controls the electric motor and provides the connection to the high voltage battery.

Compared to its predecessors, the new block offers even higher power and torque density and is even lighter and more compact.

—Dr. Markus Heyn, Member of the Board of Management of Bosch and President of the Mobility Solutions business area

Together, the weight of the motor and the inverter is around 80 kilograms. Bosch has reduced electrical losses by more than 20% thanks to new power semiconductors, which enable an inverter efficiency level of 97%, thus increasing vehicle autonomy.

Thanks to the flexible construction, it is now even easier to integrate the drive module into existing and new vehicle models.

The electric drive will make its debut at Daimler Truck, supplemented by a DC/DC converter and Bosch’s vehicle control unit for the transmission. The maximum power of the unit is 129 kW, while the continuous power is 100 kW. For a short time, the permanent magnet synchronous machine can generate a maximum torque of 430 N m. Even with a vehicle weight of 8.5 tons, this guarantees superior driving performance in all situations, including hilly cities such as Tokyo, Rome or San Francisco.

Bosch engineers based the design of the electric motor and inverter on technology used in the passenger car segment. This not only accelerated the development phase considerably, but also reduced costs.

By integrating the electric drive module into the vehicles existing water cooling circuit, an oil-based cooling circuit is no longer necessary. In addition, the high rotational speed of the electric motor ensures transmission at sufficient speed to meet all requirements.

The reduced dimensions of the new electric motorization now make it possible to use a battery made up of a single piece. The new microcontrollers offer significantly more computing power to process complex electric drive control algorithms in milliseconds. In this context, the software is largely responsible for the behavior of the electric drive and can be adapted to specific customer requirements.

The drive module will roll off the production line in Hildesheim, Germany, Bosch’s flagship factory for electric drives.

Bosch has already invested more than 5 billion euros in electric mobility, Heyn said. Since 2018, the company has acquired 170 production projects. Turnover is expected to exceed the five billion euro mark in 2025.

Bosch has a wide portfolio of products available to customers, ranging from individual sensors, electric motors, power electronics and electronic control units to integrated solutions such as the eAxle, including pre-installed modules. -integrated. The advanced drive module, for example, which integrates transmission, steering and brakes, offers simplified interfaces and thus improves communication between components. This ensures optimal interaction between systems and subassemblies of the electric vehicle, for example in terms of vehicle stabilization or energy recovery, as well as a significantly shorter time to market.

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