Patent ID: 7629065

Claim:
A fuel cell system comprising: a fuel cell stack formed by stacking a plurality of fuel cells in a stacking direction, said fuel cells each including an electrolyte electrode assembly and separators sandwiching said electrolyte electrode assembly, said electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between said anode and said cathode, said fuel cell stack being provided in a casing, wherein said casing includes first and second electrically conductive casings, and said first and second electrically conductive casings are fixed such that an insulating member is interposed between said first and second electrically conductive casings for electrically insulating said first and second electrically conductive casings from each other; a gas barrier is provided between said first electrically conductive casing and said second electrically conductive casing for preventing a flow of an exhaust gas from said second electrically conductive casing into said first electrically conductive casing; said first electrically conductive casing is electrically connected to one pole of said fuel cell stack; said second electrically conductive casing is electrically connected to the other pole of said fuel cell stack; and said gas barrier electrically connects said first electrically conductive casing to the one pole of said fuel cell stack.