| 摘要 |
PROBLEM TO BE SOLVED: To accord phases of a non-circular insulating collar member and a seal member with certainty and to secure a desired sealability, by a simple and economical configuration.SOLUTION: A fuel cell stack 10 has an insulating collar member 84a provided to an oxidant gas supply manifold hole 80a of an end plate 18b. The insulating collar member 84a has a cylindrical part 88 with a non-circular cross section inserted into an inner peripheral surface of an oxidant gas supply manifold 100. A first O-ring 92a and a second O-ring 92b slidably contacted with the inner peripheral surface are attached to an outer peripheral surface of the cylindrical part 88. Relative phase matching between the first and second O-rings 92a and 92b and the outer peripheral surface is performed via a phase determination mechanism 93. |
