| 摘要 |
Each fuel cell unit of a polymer electrolyte membrane fuel cell stack includes a membrane electrode assembly 20 with an anode electrode film on one face and a cathode electrode film on an opposite face, and anode current collector 26 and a cathode current collector 27 on the respective anode and cathode sides of the membrane electrode assemblies, and a separator plate 40 disposed between the anode electrode film side of one cell unit and the cathode electrode film side of an adjacent cell unit. The separator plate has guides, such as corrugations 60a, 60b for distributing fuel and oxidant gases to the anode electrode film side and the cathode electrode film side, respectively. The separator plate is constructed of at least two coextensive sheet metal elements (30, 31) having substantially identically shaped guides to promote the distribution of reactant gases to the electrodes of the fuel cell units of the fuel cell stack. The coextensive sheet metal elements are nestled together and form a coolant flow space (32) there-between.
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