Patent ID: 7939969

Claim:
A power supply system capable of supplying an electric power to a load device, the power supply system comprising: first and second power storage devices allowing charging and discharging; a power line configured to be capable of supplying and receiving an electric power between the power supply system and said load device; a first converter arranged between said first power storage device and said power line, and performing voltage conversion between said first power storage device and said power line; a second converter arranged between said second power storage device and said power line, and performing voltage conversion between said second power storage device and said power line; a control device controlling said first and second converters; a first voltage sensor sensing a voltage on said power line; and a temperature increase control unit configured to increase a temperature of at least one of said first and second power storage devices by controlling the supplying and receiving of an electric power between said first and second power storage devices via said first and second converters and said power line, wherein said control device controls one of said first and second converters based on a result of an operation in voltage feedback control of said one converter using a deviation between a target voltage on said power line and a voltage sensed by said first voltage sensor, and controls the other converter based on a result of an operation in a voltage feedforward control of said other converter not using said deviation.