Patent ID: 7722977

Claim:
A solid polymer electrolyte fuel cell stack comprising: a plurality of electrolyte electrode assemblies and a plurality of separators stacked alternately in a stacking direction, said electrolyte electrode assemblies each including a pair of electrodes, and an electrolyte interposed between said electrodes; one or more fluid passages for coolant and reactant gases extending in the stacking direction through at least the plurality of separators of said fuel cell stack, the one or more fluid passages including an electrically conductive fluid flowing therein; and a corrosion current collector provided at said one or more fluid passages to collect corrosion current in the electrically conductive fluid flowing through said one or more fluid passages, wherein said corrosion current collector is electrically parallel with a liquid having a liquid resistance that is present on a surface of at least one of said separators in said fuel cell stack at least on a high potential side in the stacking direction of a stack body formed by stacking said electrolyte electrode assemblies and said separators alternately.