Patent ID: 8349509

Claim:
A fuel cell system comprising: a judgment unit which makes a failure judgment in a reaction gas passage based on a pressure changing state of reaction gas in a failure detection portion by (i) consuming the reaction gas in the failure detection portion of the reaction gas passage by means of a fuel cell and (ii) causing auxiliary devices supporting the fuel cell system or an auxiliary inverter to consume electric power generated by the fuel cell; a secondary battery that receives at least a portion of the electric power generated by the fuel cell; a control unit programmed to increase consumption of the reaction gas in the failure detection portion by increasing electric power consumption of the auxiliary devices supporting the fuel cell system or the auxiliary inverter when the electric power generation of the fuel cell exceeds a total sum of chargeable power of the secondary battery and the electric power consumption of the auxiliary devices, wherein the electric power generation of the fuel cell is the power that is generated by consuming the reaction gas in the failure detection portion of the reaction gas passage.