Power supply control system of hydrogen fuel cell vehicle

The invention discloses a power supply control system of a hydrogen fuel cell vehicle, which comprises a driving coupler, a hydrogen fuel cell, a power cell, a vehicle control unit and a driving motor, wherein a power distributor is arranged in the driving coupler; the hydrogen fuel cell and the power cell can independently or jointly provide a high-voltage power source for the driving motor through the power distributor, the hydrogen fuel cell can charge the power cell, and the vehicle control unit is used for monitoring state information of the hydrogen fuel cell, the power cell and the driving motor. According to the power supply system of the hydrogen fuel cell vehicle, the driving coupler is additionally arranged, combined distribution of a hydrogen fuel cell power supply and a power battery power supply can be achieved, the power supply mode is optimized, the use cost of the vehicle is reduced, braking energy recovery is achieved, and meanwhile the situation that the hydrogen fuel cell is charged, and t