Fuel cell stack

A fuel cell stack comprising a stack of three or more fuel cells, wherein:

• each of the fuel cells comprises an assembly in which an anode electrode and a cathode electrode are respectively joined to either side of an electrolytic membrane, the anode electrode being located closer to one end, in a stack direction of the fuel cells, than the cathode electrode;
• an anode gas flow channel through which a fuel gas to be supplied to the anode electrode flows, a cathode gas flow channel through which an oxidant gas to be supplied to the cathode electrode flows, and a refrigerant flow channel through which a refrigerant flows are formed independently from each other in the assembly;
• temperature regulating parts, each of which is provided between the anode electrode of one fuel cell of adjacent fuel cells and the cathode electrode of the other fuel cell for regulating the temperatures of the anode electrode and the cathode electrode, are disposed at a plurality of sites along the stack direction;
• and
• at least one but not all of the temperature regulating parts provided at the plurality of sites performs temperature regulation to bring about a difference in heat dissipating capability between the anode electrode and the cathode electrode.

A fuel cell stack comprising a stack of three or more fuel cells, wherein:

• each of the fuel cells comprises an assembly in which an anode electrode and a cathode electrode are respectively joined to either side of an electrolytic membrane, the anode electrode being located closer to one end, in a stack direction of the fuel cells, than the cathode electrode,
• an anode gas flow channel through which a fuel gas to be supplied to the anode electrode flows, a cathode gas flow channel through which an oxidant gas to be supplied to the cathode electrode flows, and a refrigerant flow channel through which a refrigerant flows are formed independently from each other in the assembly;
• and
• a temperature regulating part is provided for causing a difference in an amount of heat exchange between an anode electrode in one fuel cell of mutually adjacent fuel cells and a cathode electrode in the other fuel cell to be varied at different positions along the stack direction.