| 摘要 |
A fuel cell system, which operates in non-humid conditions, is provided with a fuel cell having a polymer electrolyte membrane which is sandwiched between an anode and a cathode, a fuel gas flow channel which is arranged so as to face the anode in order to supply fuel gas containing at least fuel components to the anode, and an oxidant gas flow channel which is arranged so as to face the cathode in order to supply oxidant gas containing at least oxidant components to the cathode, said fuel cell system being characterised by the flow direction of the fuel gas in the fuel gas flow channel and the flow direction of the oxidant gas in the oxidant gas flow channel being opposite to one another, and by being provided with a humidity control means which controls the flow rate and/or the pressure of the fuel gas such that when the humidity state of the region at the entrance to the fuel gas flow channel has temporarily changed from the present humidity state to a low humidity state which is lower than the target humidity state, the humidity state changes from said low humidity state to the target humidity state. |
