Bosch starts production of 800-volt technology for electric vehicles

Bosch is now starting the production of new powertrain solutions based on 800-volt technology. This will make recharging faster and provide a further boost for electromobility. The 800-volt version of the inverter is based on silicon carbide (SiC) semiconductors. These increase efficiency, and thus also range. In the 800-volt variant of the electric motor, Bosch has increased the power density. This reduces weight and allows for a more compact design. A premium German automaker is now using the active parts of this powertrain, i.e. the rotor and stator, for the first time.

The standout features of the 800-volt variant of the Bosch electric motor now going into volume production are 830 Nm torque and 460 kilowatts output. Thanks to the use of I-pin bar winding, the motor’s efficiency, compactness, and level of automation in production can be further improved. In terms of power-to-weight ratio, this delivers 35 percent more power density, at 60 kilowatts per kilogram. On top of this, it offers an excellent torque density of 105 Newton meters per kilogram. This means that the Bosch motor achieves a maximum efficiency of up to 98 percent. The next generation of the electric motor will feature oil cooling. This will allow the heat generated in the electric motor to be drawn away better, and ensure continuously powerful operation over long distances, as well as in commercial vehicles.