Patent ID: 8084988

Claim:
A power supply system mounted on a vehicle, the system comprising: an electric power supply means; a first voltage boosting means having one end connected to the electric power supply means and another end connected to an electric motor for driving the vehicle, the first voltage boosting means boosting an output voltage from the electric power supply means for supplying the electric motor with electric power resulting from the boosted voltage; a second voltage boosting means having one end connected to the other end of the first voltage boosting means and in parallel with the electric motor, the second voltage boosting means further boosting an output voltage from the first voltage boosting means; an electric power accumulating means connected to another end of the second voltage boosting means; and an external power source connecting means connected to the one end of the first voltage boosting means and in parallel with the electric power supply means, the external power source connecting means receiving supply of electric power from an external power source.