At present, the internal of new energy vehicles on the market inevitably use battery packs and motors as power sources. These new energy vehicles that use battery packs, motors, and other power sources have high-voltage and low-voltage electrical systems inside. In addition to the traditional low-voltage 12V or 24V power supply, several hundred volt high-voltage battery packs and related high-voltage components have also been added. For low-voltage components, there are traditional transient immunity tests IS07637-2 and -3; For newly added high-voltage components, considering safety issues, it is crucial to conduct immunity testing on them.
IS07637-4 is a new electrical transient conduction test standard for shielded high-voltage lines, developed by the Vehicle Electrical, Electronic Components, and General Systems Subcommittee SC32 of ISO/TC22 International Organization for Standardization/Road Vehicles Technical Committee.
The two types of immunity tests specified in standard IS07637-4 are:
Test pulse B: Used to simulate anti-interference testing of high-frequency oscillations, such as IGBT fast switching. Test pulse C: Used to simulate anti-interference testing of transient voltages, such as interference similar to rectangular pulses, containing different harmonics and fast rise times.