| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration due to heat as much as possible, by preventing occurrence of a heat spot reliably, on the downstream side of an H flow type cooling medium flow path.SOLUTION: In a fuel cell stack 10, a plurality of fuel cells 12 are stacked. Between a first separator 24 and a third separator 30, which constitute respective fuel cells 12 and are adjacent to each other, a cooling medium flow path 52 is formed. In a second cooling medium flow path 52B that is a part of the cooling medium flow path 52, a plurality of corrugated flow path grooves 52b are provided between corrugated protrusions 52a. The flow path width of a corrugated flow path grooves 52bm on the central side in the flow path width direction is set wider than the corrugated flow path grooves 52b on both sides in the flow path width direction. |
