| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell stack, capable of preventing back-flow of generated water. <P>SOLUTION: An inlet-side fuel gas communication hole 36a for supplying reaction gas, an inlet-side oxidizer gas communication hole 38a, an outlet-side fuel gas communication hole 36b for discharging reacted gas of the reaction gas, and an outlet-side oxidizer communication hole 38b are provided on the outer peripheral portion of a first separator 14 and a second separator which hold a unit fuel cell so as to penetrate through the laminating direction of the fuel cell stack. The reaction gas flows from the inlet-side fuel gas communication hole 36a and inlet-side oxidizer gas communication hole 38a to the outlet-side fuel gas communication hole 36b and outlet-side oxidizer gas communication hole 38b through a plurality of reaction gas passages, or first oxidizer gas passage grooves 42, second oxidizer gas passage grooves 44, first fuel gas passage grooves, first fuel gas passage grooves and second fuel gas passage grooves. Among the reaction gas flow passages, the second oxidizer gas passage grooves 44 and second fuel gas passage grooves situated at the bottom in the direction of gravitational force are located above the bottom of the outlet-side fuel gas communication hole 36b and outlet-side oxidizer gas communication hole 38b. <P>COPYRIGHT: (C)2011,JPO&INPIT |
