Patent ID: 9252450
Filing Date: 2016-02-02
CPC Classification: H01M,Y02E

Claim Text:
1. A fuel cell stack formed by stacking a plurality of fuel cells in a stacking direction, the fuel cells each being formed by sandwiching an electrolyte electrode assembly between a first separator and a second separator, the electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between the anode and the cathode, wherein at least the first separator includes: a sandwiching section for sandwiching the electrolyte electrode assembly, a reactant gas channel for supplying a reactant gas along an electrode surface being formed in the sandwiching section; a reactant gas supply section, a reactant gas supply passage for supplying the reactant gas to the reactant gas channel extending through the reactant gas supply section in the stacking direction; and a load absorbing mechanism provided in the reactant gas supply section for absorbing a load applied in the stacking direction, and wherein the load absorbing mechanism includes: a pair of coupling members for coupling a pair of the reactant gas supply sections that are adjacent to each other in the stacking direction and through which the reactant gas flows, the coupling members having spring property for absorbing the load applied in the stacking direction; and a seal member for preventing leakage of the reactant gas from the reactant pas supply section, and wherein outer dimensions of one of the pair of coupling members are larger than outer dimensions of the other of the pair of coupling members; the outer circumferential end of the one of the pair of coupling members is folded so as to cover the outer circumferential end of the other of the pair of coupling members which is interposed between a pair of the seal members, thereby to join the pair of coupling members and the pair of seal members together.