Patent ID: 8076017
Filing Date: 2011-12-13
Classification: H01M,Y02E

Abstract:
1. A fuel cell stack comprising: a cell assembly formed of a stacked unit cells, each composed of a membrane electrolyte assembly and separators which sandwich the membrane electrolyte assembly; a pair of collector plates A and B which sandwiches the cell assembly; a pair of end plates A and B which sandwiches the cell assembly and the collector plates; and an elastic member disposed between end plate A and collector plate A, wherein end plate A has a convexed portion and a concaved portion on a surface facing collector plate A, and the concaved portion of end plate A holds therein the elastic member, a bottom surface of the concaved portion includes a second convexed portion and a second concaved portion so that a part of a surface of the elastic member facing end plate A does not contact with the end plate A, and the elastic member contacts with a second convexed portion of the end plate A.