Honda Motor Co., Ltd.
FUEL CELL METAL SEPARATOR AND POWER GENERATION CELL

Abstract:

In a flange in the form of a flat plate inside a bead seal (e.g., fluid passage bead) around a fluid passage (e.g., an oxygen-containing gas supply passage) of a fuel cell metal separator (e.g., a first metal separator), a tunnel is provided in a straight segment adjacent to a curved segment of an inner marginal portion of the flange. The tunnel is formed by expansion in a separator thickness direction.