Inverter compatible with 800V systems for the Porsche Taycan (assumed)

Introduced by Hitachi Automotive Systems; from the Spring 2020 Congress Technical Sessions

2020/08/05

Summary
Outline of high-voltage and high-output inverter
To accommodate high voltages for components and packaging
Double-sided cooling power module
Conductor laminated insulation sheet

Summary

Inverters and power modules compatible with 800V systems
(Displayed at the Hitachi booth, Tokyo Motor Show 2019）

The Spring 2020 Congress of the Japan Society of Automotive Engineers (JSAE) was scheduled to be held in May 2020 but was canceled due to the new coronavirus (COVID-19) global pandemic. The JSAE has instead released the technical papers that were scheduled to have been presented during the symposium’s technical sessions.

This report introduces new technologies for 800V compatible inverters from the "High Voltage and High Power Density Technologies for Inverter in Vehicle" paper by Ayumu Hatanaka et al of Hitachi Automotive Systems (Hitachi AMS).

Hitachi AMS has been promoting downsizing the inverter by using a double-sided direct water-cooled power module, which was adopted for the inverter of the Audi e-tron released in March 2019. The newly developed inverter is compatible with 800V battery-voltage systems, was developed for the Porsche Taycan EV, and appears to have gone into production from Q2 of 2019.

To make the 800V-compatible inverter possible, Hitachi AMS increased the withstand voltage of each component typified by changing the power device from a 700V to 1200V withstand voltage product, ensuring that the size of the device remained compact while developing technology such as high voltage insulation structural components, optimizing the terminal shape of the power module, and adopting conductor laminated insulation sheets.

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