Patent ID: 7989978

Claim:
A power supply system capable of transferring power to and from a load device, comprising first and second chargeable power storage devices; a power line for transferring power between the power supply system and said load device; first and second converters provided corresponding to said first and second power storage devices, respectively, and each performing voltage conversion between the corresponding power storage device and said power line; and a control device controlling said first and second converters, wherein said control device includes: a first command producing unit producing a first power command for transferring power between the power supply system and said load device, a second command producing unit producing a second power command for transferring a power between said first and second power storage devices when temperature increase control is performed for increasing a temperature of at least one of said first and second power storage devices, and a control unit controlling said first and second converters such that the power indicated by said first power command is transferred between the power supply system and said load device, and power indicated by said second power command is transferred between said first and second power storage devices, said first command producing unit divides said first power command into a first command value for said first converter and a second command value for said second converter in accordance with a predetermined distribution ratio, said second command producing unit produces, as said second power command, a third command value for said first converter and a fourth command value for said second converter prepared by inverting a sign of said third command value, and said control unit controls said first converter based on a command value prepared by adding said third command value to said first command value and controls said second converter based on a command value prepared by adding said fourth command value to said second command value.