| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminating property improving structure of a metal separator for a fuel cell stack in which a plurality of separators can be laminated in a stable honeycomb structure. <P>SOLUTION: The fuel cell stack is provided with a unit cell composed of a membrane electrode assembly, a gas diffusion layer which transfers reaction gas to an electrode of the membrane electrode assembly, a metal separator which is connected on an outer side of the gas diffusion layer and supports the membrane electrode assembly and a gasket which prevents reaction gas leakage and provided with a connecting plate on which there is formed a manifold through which the reaction gas and cooling water come in and out. The metal separator is composed of a plurality of separator manifolds formed on one side end part in a longitudinal direction corresponding to the above manifold and a concavo-convex structure having repetition of a concave part which recesses inside around a circumference and a convex part which extrudes outside, and the concavo-convex structure is laminated in a honeycomb structure where one separator is laminated with another separator. <P>COPYRIGHT: (C)2008,JPO&INPIT |
