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

摘要

A power supply system comprises a main electric storage device (BA) and a plurality of sub electric storage devices (BB1, BB2). A converter (12B) is connected with selected one of the sub electric storage devices (BB1, BB2) and performs bidirectional voltage conversion between the selected sub electric storage device and a power feeding line (PL2). When the travel mode of an electromotive vehicle (1) is an EV mode, switching processing of the sub electric storage devices is carried out on the basis of the SOC of the selected sub electric storage device. When the travel mode of the electromotive vehicle (1) is an HV mode, control of maintaining the SOC of the whole of the main electric storage device (BA) and the sub electric storage devices (BB1, BB2) to be constant is carried out and switching of the selected sub electric storage device is prohibited.