Patent ID: 8580447

Claim:
A fuel cell system comprising: a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidizing gas and is constituted by a laminated stack of unit cells; detection means for detecting a dispersion among wet states of the unit cells arranged in a lamination direction of the unit cells; and control means for suppressing the dispersion among the wet states by controlling a flow rate of a cooling medium for cooling the unit cells when the dispersion among the wet states is equal to or exceeds a threshold, wherein the control means further controls at least one of gas flow rates of the fuel gas and the oxidizing gas and gas pressures of the fuel gas and the oxidizing gas, and where the control means sets an order of priority for the flow rate of a cooling medium, the gas flow rates and the gas pressures and control is performed in accordance with this order of priority by first controlling the flow rate of the cooling medium and then controlling the gas flow rates and/or the gas pressures.