Power-supply management system and method

The present invention provides a kind of power-supply management system and methods, comprising: battery system, for providing supply voltage for electric machine controller, motor and PCU；PCU for carrying out conversion process to supply voltage, and the first output voltage is exported after power protection module to ECU, and the second output voltage is exported to EPS and acquisition ECU for power information；Power protection module, for carrying out current limliting to ECU；Car body controller locks number according to the cabinet in the first signal after receiving the first signal that control unit for vehicle is sent by CAN bus, control cabinet lock is numbered corresponding cabinet lock and is opened, and the state of detecting box lock, cabinet lock status signal is generated, and cabinet lock status signal is sent to control unit for vehicle.Avoid interference of the EPS to ECU as a result, improve automatic Pilot and personalize degree and precision, and can obtain in real time ECU for power information.