Collision Safety Overview
Usually, electric vehicles use large-capacity power batteries up to about 400 V as the power source to drive the vehicles, so the power batteries that are not cut off will cause threats and injuries to vehicles and people that cannot be ignored. If the car collides, rolls over or is hit by other cars in the charging state and other accidents during driving, it will cause friction or contact between the power battery pack, high-voltage electrical equipment and high-voltage wiring harnesses and the body, resulting in potential Dangers of insulation failure and short circuits. In order to avoid car safety problems caused by the above conditions, the state of the car can be detected through some related sensors (such as collision sensors, angle sensors), and the high-voltage management system will immediately turn off the high-voltage power after receiving the information from the related sensors. , and use the residual power discharge circuit of the high-voltage system to discharge the voltage of the capacitor terminal of the high-voltage components of the automobile within 1 s, so as to avoid the occurrence of electric shock accidents caused by fire or leakage accidents.