Patent ID: 9368812
Filing Date: 2016-06-14
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 formed by stacking an electrolyte electrode assembly and a separator, the electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between the anode and the cathode, the separator comprising: a sandwiching section for sandwiching the electrolyte electrode assembly, a fuel gas channel for supplying a fuel gas along an electrode surface of the anode and an oxygen-containing gas channel for supplying an oxygen-containing gas along an electrode surface of the cathode being provided separately in the sandwiching section; a bridge section connected to part of an outer circumference surface of the sandwiching section, a fuel gas supply channel for supplying the fuel gas to the fuel gas channel, a fuel gas return channel for returning the fuel gas which has flowed through the fuel gas channel, and an oxygen-containing gas supply channel for supplying the oxygen-containing gas to the oxygen-containing gas channel being formed in the bridge section; a reactant gas supply section connected to the bridge section, a fuel gas supply passage for supplying the fuel gas to the fuel gas supply channel, a fuel gas discharge passage for discharging the fuel gas which has flowed through the fuel gas return channel, and an oxygen-containing gas supply passage for supplying the oxygen-containing gas to the oxygen-containing gas supply channel each extending through the reactant gas supply section in the stacking direction; a first connector section connecting the bridge section and said part of the outer circumference surface of the sandwiching section; and a second connector section connecting the bridge section and the reactant gas supply section, wherein the bridge section is provided integrally with the reactant gas supply section, and surrounds an entire outer periphery of the outer circumference surface of the sandwiching section, and the first connector section and the second connector section are arranged opposite to each other across the outer circumference surface of the sandwiching section.