Patent ID: 6855442
Filing Date: 2005-02-15
Classification: H01M,Y02E

Abstract:
1. A fuel cell comprising: a membrane electrode assembly comprising a solid polymer ion exchange membrane, an anode electrode mounted on one surface of said solid polymer ion exchange membrane, and a cathode electrode mounted on the other surface of said solid polymer ion exchange membrane: an anode separator; a cathode separator, said membrane electrode assembly being sandwiched between said anode separator and said cathode separator; a fuel gas passage disposed between said anode electrode and said anode separator; a circulation passage connecting a fuel gas pump disposed outside of the fuel cell in series to said fuel gas passage; an intermediate fuel gas supply port connected to said fuel gas passage between a fuel gas inlet and a fuel gas outlet thereof; and an intermediate fuel gas supply mechanism for supplying a fuel gas, which is lower in humidity than a fuel gas flowing upstream of said intermediate fuel gas supply port, from said intermediate fuel gas supply port to said fuel gas passage.