Patent ID: 7911077

Claim:
A power supply system capable of supplying an electric power to a load device, comprising: first and second power storage devices capable of charging and discharging; an electric power line configured to allow an electric power to be exchanged between the power supply system and said load device; a first converter provided between said first power storage device and said electric power line to convert a voltage between said first power storage device and said electric power line; a second converter provided between said second power storage device and said electric power line to convert a voltage between said second power storage device and said electric power line; and a control device to control said first and second converters, wherein said control device controls the converter corresponding to the power storage device on a charge side so as to prevent a voltage of the charge-side power storage device from exceeding an upper limit value, and controls the converter corresponding to the power storage device on a discharge side so as to prevent a voltage of the discharge-side power storage device from falling below a lower limit value, during temperature rise control to raise temperature of at least one of said first and second power storage devices by exchanging the electric power between said first and second power storage devices through said first and second converters and said electric power line.