Patent ID: 8681457

Claim:
A power source system for an electric powered vehicle mounting a motor generating power for driving the vehicle, comprising; a power storage device; a power line supplying power to an inverter controlling driving of said motor; a voltage converter formed to include a plurality of switching elements, performing bi-directional voltage conversion between said power storage device and said power line, through on/off control of said plurality of switching elements; a plurality of switches connected between positive and negative electrodes of said power storage device and said voltage converter, respectively, each of said switches being formed to have a first current direction in which cutting of current is relatively easy and a second current direction in which cutting of current is relatively difficult; and a controller controlling on/off of said plurality of switches: wherein said controller controls turning-off of said plurality of switches such that at least one of order and timing of turning off said plurality of switches is changed depending on which of said plurality of switching elements is short-circuited, when short-circuit occurs in said voltage converter while each of said switches is in a conductive state.