Patent ID: 7767355
Filing Date: 2010-08-03
Classification: H01M,Y02E

Abstract:
1. A fuel cell stack including a stacked structure composed of a plurality of electricity-generating cells each having a membrane electrode assembly with a pair of electrodes arranged on both sides of the electrolyte, said membrane electrode assembly being sandwiched by separators, comprising: a dummy cell arranged at least one end in a stacking direction of said stacked structure, said dummy cell including at least a conductive plate separate and distinct from the membrane electrode assembly of an electricity-generating cell and a pair of dummy cell separators which sandwich said conductive plate, wherein the dummy cell does not generate electricity, wherein no reactant gas is supplied on a surface of the pair of dummy cell separators, wherein said dummy cell separators sandwiching said conductive plate are identical to the separators sandwiching the membrane electrode assembly, and wherein said conductive plate is made from a first material having a first electric resistance, the dummy cell separators are made from a second material having a second electric resistance, the second material is different than the first material and the first electric resistance is higher than the second electric resistance.