Patent ID: 7969039

Claim:
A method of controlling a fuel cell vehicle including a DC/DC converter having a plurality of phase arms, the phase arms arranged in parallel in an electrical circuit that forms a branch between a fuel cell and a driving motor and connects to a power storage device, the phase arms each comprising an upper arm switching device and a lower arm switching device, and a controller for outputting drive signals to the upper and lower arm switching devices and controlling voltage conversion of the DC/DC converter, the method comprising the steps of: executing, by the controller, direct couple control in which the fuel cell or the driving motor is directly coupled with the power storage device without causing the DC/DC converter to convert voltage; and during the direct couple control, intermittently outputting a drive signal that causes no voltage conversion, to at least one of the upper arm switching devices so as to control an on/off state of the upper arm switching devices of the plurality of phase arms such that current flow is shifted from one upper arm switching device of one phase arm to another upper arm switching device of another phase arm whenever a new switching cycle begins.