This requires the high-voltage management system to monitor the current of the power battery in real time. When an abnormal current is detected, the high-voltage management system will cut off all high-voltage circuits in time and issue an audible and visual alarm to remind drivers and other vehicles. In order to improve the accuracy and precision of the measurement, the article selects the Hall-type current sensor to detect the charging and discharging current of the power battery.
High-voltage contactor contact state detection and fault handling: In order to realize the control function of pure electric vehicles and the self-cutting protection function of high-voltage circuits, the high-voltage system of electric vehicles must be equipped with controllable and self-protective cutting-off high-voltage circuit functions. High voltage contactor. According to the requirements of vehicle design, any electric vehicle will be equipped with a high-voltage contactor in the power main circuit. If the contact of the high-voltage contactor fails to close or disconnect, there is no corresponding correct way to deal with it, which may cause abnormal The car cannot be started normally or cannot be started due to the control.