Patent ID: 8501362

Claim:
A fuel cell stack, comprising: a plurality of fuel cell modules stacked in a predetermined direction, each of the fuel cell modules comprising: a first membrane electrode assembly and a second membrane electrode assembly, each including an electrolyte membrane, a cathode and an anode arranged to sandwich two faces of the electrolyte membrane, wherein the first membrane electrode assembly and the second membrane electrode assembly are arranged, such that the respective cathodes are opposed to each other; a first separator located between the first membrane electrode assembly and the second membrane electrode assembly to define an oxygen flow path arranged to supply oxygen to the cathodes included in the first membrane electrode assembly and the second membrane electrode assembly; a hydrogen flow path arranged to supply hydrogen to the anodes included in the first membrane electrode assembly and the second membrane electrode assembly; and a coolant flow path arranged to cool down the anodes included in the first membrane electrode assembly and the second membrane electrode assembly, wherein the fuel cell stack does not have a coolant flow path for cooling down the cathodes, and wherein the first separator serves as a common flow path-forming member for supplying oxygen to the cathodes included in the first membrane electrode assembly and the second membrane electrode assembly.