The battery management system is closely integrated with the power battery of the electric vehicle. The sensor detects the voltage, current and temperature of the battery in real time. At the same time, it also performs leakage detection, thermal management, battery balance management, alarm reminder, and calculation of remaining capacity (SOC). , discharge power, report the state of battery deterioration (SOH) and remaining capacity (SOC), and also control the maximum output power with an algorithm to obtain the maximum mileage according to the voltage, current and temperature of the battery, and use an algorithm to control the charger for optimal current. Charging, real-time communication with the vehicle master controller, motor controller, energy control system, vehicle display system, etc. through the CAN bus interface.