EMC FLEX BLOG A site dedicated to Automotive EMC Testing for Electronic Modules

Automotive Battery Ground Offset

28. June 2022 11:36 by Christian in Electric Vehicle, Grounding, Test Methods
 The EV does not mean the end of 12V automotive battery. For various safety reasons, complex mo

 The EV does not mean the end of 12V automotive battery. For various safety reasons, complex modules are powered using two 13.5V / 200A batteries such that the Backup battery comes into play the moment the Main battery's voltage is outside operating voltage range.

The Ground Offset Test involves a voltage variation of +/- 1V on Supply Return line that may affect DUT circuitry referenced to an absolute 0V via remote ground. The diagram below shows how to use a combination of three power supplies to simulate the +/- 1V Ground Offset condition.

 

 

2022-06-29

Christian Rosu