Patent ID: 7994745

Claim:
A power supply device for vehicles, which is mounted on a vehicle, has an output unit connected to a motor which is rotated with a drive wheel, supplies drive power to the motor during a power running operation of the motor, and recovers regenerative power of the motor during a regenerative operation of the motor, the power supply device comprising: a fuel cell which is connected to the output unit; a capacitor which is connected in parallel to the fuel cell; a secondary battery which is connected in parallel to the capacitor through a current limiting means; and a current control means which limits an output current from the secondary battery to at most a predetermined output upper-limit current in the case where an electrical power is supplied to the motor from the secondary battery during the power running operation of the motor; and limits an input current to the secondary battery to at most an input upper-limit current smaller than the output upper-limit current through the current limiting means in the case where the regenerative power of the motor is recovered into the secondary battery during the regenerative operation of the motor.