System and method for controlling high-voltage power-on and power-off processes of fuel cell

The invention provides a fuel cell high-voltage power-on and power-off process control system and method. The system comprises a fuel cell high-voltage bus voltage detection device which comprises a fuel cell bus voltage detection device and a fuel cell bus capacitor voltage detection device; the high-voltage bus fusing device comprises a fuel cell main loop fuse; the fuel cell high-voltage pre-charging device comprises a pre-charging contactor, a high-voltage pre-charging resistor, a fuel cell high-voltage main positive contactor and a fuel cell high-voltage main negative contactor. According to the invention, the active discharge strategy when the system is shut down is executed by judging the magnitude of the voltage at the voltage of the fuel cell, the magnitude of the discharge current can be accurately controlled, the discharge timeliness of the fuel cell is improved, and the whole life cycle of the fuel cell is prolonged. 本发明提供一种燃料电池高压上下电流程控制系统及方法。系统包括：燃料电池高压母线电压检测装置，包括燃料电池母线电压检测装置以及燃料电池母线电容电压检测装置；高压母线