Insulation Resistance Troubleshooting
The degree of electrification of electric vehicles is higher than that of traditional vehicles. Among them, battery packs, electric drive systems, high-voltage electrical auxiliary equipment, chargers and high-voltage wiring harnesses are in the harsh environment of vehicle collisions, overturning and vehicle operation (vehicle vibration, external environment humidity, etc.) Under the influence of temperature and temperature), the insulation performance between the high-voltage circuit and the chassis of the car may be reduced, which may cause car fires and directly affect the lives of car drivers and passengers. Therefore, when designing the high-voltage system of an electric vehicle, first of all, ensure that the insulation resistance value is greater than 100 Ω/V; secondly, when the insulation resistance value of the vehicle is lower than the specified value, the high-voltage management system should cut off all high-voltage circuits in time and issue an audible and visual alarm , and last for a certain period of time until the original fault disappears before the car is allowed to be powered on next time.