Patent ID: 7776481

Claim:
A fuel cell system comprising: a fuel cell operated for power generation by reaction of reactant gases supplied to said fuel cell; an energy storage for assisting the output of said fuel cell, said energy storage being charged with electrical energy supplied from said fuel cell through a DC/DC converter; at least one electrical device other than said energy storage; a detector for detecting a request for stopping power generation of said fuel cell; and a discharge electrical energy controller for controlling electrical energy discharged from said fuel cell, wherein at the time of supplying electrical energy discharged from said fuel cell to said energy storage and the other electrical device after detection of the request for stopping power generation, said discharge electrical energy controller supplies the electrical energy preferentially to the electrical device other than the energy storage, wherein if the preferentially supplied energy, on receipt of the request by the detector, is greater than the energy consumed by the electrical device, the remaining energy is supplied to the energy storage.