Honda Motor Co., Ltd.
FUEL CELL GASKET

Abstract:

A bipolar plate is provided that prevents pressure leaks from occurring at a seal bead. A fuel battery gasket is provided. The gasket is structured to include a pair of metal-made bipolar plates, seal beads, and a tunnel. The bipolar plates are interposed between a plurality of reaction electrode portions. The bipolar plates are fastened together with the reaction electrode portions and thereby joined to each other. The seal beads are provided at one or both of the bipolar plates by being patterned in full-bead forms. The tunnel is bridged between the adjacent seal beads and allows their insides to communicate with each other. When a height of the seal bead is H1 and a height of the tunnel is H2, H1/H2 is set to be equal to or larger than 1.6.