Patent ID: 7998636
Filing Date: 2011-08-16
Classification: H01M,Y02E

Abstract:
1. A fuel cell stack comprising: a cell stack body having stacked single cells and a manifold for supplying or discharging a fluid to or from the stacked single cells, each single cell including a membrane electrode assembly and a separator sandwiching the membrane electrode assembly; an end plate stacked onto the cell stack body and having a through-hole extending along the stacking direction of the cell stack body; and a fluid tube body detachably inserted into the through-hole so as to pass through the end plate, the fluid tube body being connected to the manifold, wherein a part of the outer surface of the fluid tube body opposite to the inner surface of the through-hole is separated from the inner surface of the through-hole, and the outer surface of the fluid tube body has a concave/convex shape, a top surface of a convex shape portion of the outer surface of the fluid tube body being in contact with the inner surface of the through-hole, or the inner surface of the through-hole has a concave/convex shape, a top surface of a convex shape portion of the inner surface of the through-hole being in contact with the outer surface of the fluid tube body.