In severe cases, it will cause danger to cars and personal safety. In view of the seriousness of the above problems, safe and effective real-time monitoring of the contact state of the high-voltage contactor should be carried out, and the fault should be dealt with. When the high-voltage contactor contacts fail to close or disconnect, the high-voltage management system will send out an audible and visual alarm to prompt the operator and control whether the car can perform other operations according to the level of the fault.
Detection and Troubleshooting of High Voltage Interlocking Circuit
The high-voltage circuit interlock function design is proposed for the reliability of the high-voltage circuit connection. The Hazardous Voltage Interlock Loop is also known as the High Voltage Interlock Loop (HVIL), which is a typical interlock system that uses electrical signals to check the electrical integrity of the entire module, wires, and connectors. When the high-voltage safety management system detects that a certain connection is disconnected or a certain connection does not meet the expected reliability, the safety management system will directly or through the vehicle controller cut off the output of the relevant power supply and send out an audible and visual alarm until the fault occurs. completely ruled out.