Bosch has started the production of new 800-volt technology to enhance the electro-mobility ecosystem further. These new silicon carbide chips increase the efficiency of power electronics to as much as 99% and use I-pin technology, resulting in up to 35% more power density for the electric motor.
Also, the inverters feature SiC chips, in which carbon atoms have been introduced into the crystalline structure of the ultrapure silicon, improving semiconductors’ electrical conductivity. In power electronics, about 50% less energy is lost in the form of heat.
Ralf Schmid, Executive Vice President, Bosch’s Powertrain Solutions, mentioned that Bosch is upping the voltage in electro-mobility. The 800-volt technology is the next step toward more powerful electrical powertrains and shorter recharging times.
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% more power density at 60 kilowatts per kilogram. On top of this, it offers an excellent torque density of 105 Nm per kg.
The next generation of the electric motor will feature oil cooling, which 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.