ELECTROMOTIVE VEHICLE POWER SUPPLY SYSTEM, ELECTROMOTIVE VEHICLE, AND ELECTROMOTIVE VEHICLE CONTROL METHOD

摘要

A power supply system includes a main power storage device (BA) and a plurality of sub power storage devices (BB1, BB2). A converter (12B) is connected to selected one of the sub power storage devices (BB1, BB2) to convert voltage between the selected sub power storage device and an electric power feeding line (PL2) bidirectionally. When the travel mode of an electrically powered vehicle (1) is an EV mode, switching processing of a sub power storage device is performed based on the selected sub power storage device's SOC. On the other hand, when the travel mode of the electrically powered vehicle (1) is an HV mode, control under which the SOC of the main power storage device (BA) and the plurality of sub power storage devices (BB1, BB2) as a whole is kept constant is carried out, and switching of the selected sub power storage device is prohibited.