Patent ID: 7399548

Claim:
A fuel cell stack formed by tightening a plurality of power generation cells together in a stacking direction, said power generation cells each comprising: a membrane electrode assembly including an anode, and a cathode, and a solid polymer electrolyte membrane interposed between said anode and said cathode; separators sandwiching said membrane electrode assembly; a fuel gas flow channel for supplying a fuel gas to said anode; a reactant air flow channel for supplying a reactant air to said cathode; a coolant air flow channel for supplying a coolant air to said membrane electrode assembly; and a blower for supplying said coolant air to a coolant air inlet and said reactant air to a reactant air inlet, wherein said reactant air flow channel includes a groove between said reactant air inlet and a reactant air outlet for supplying said reactant air to flow along a surface of said cathode; said coolant air flow channel includes a groove between said coolant air inlet and a coolant air outlet for supplying said coolant air to flow along a surface of one of said separators; and wherein said reactant air outlet and said coolant air outlet are positioned at a side portion of the separators, and are directly exposed to the outside.