| 摘要 |
A metal separator for a polymer electrolyte fuel cell is provided to prevent the generation of bubbles, to improve the uniformity of cooling flow and to reduce the pressure difference of a cooling medium regardless of a gas channel of serpentine structure. A metal separator comprises a plurality of layers of a cell comprising a gasket(12,14), a membrane electrode assembly and a gas diffusion layer(13) which are adhered between separators, wherein the metal thin film of the separator is made by stamping method. The metal separator(10,11) is provided with a serpentine channel for delivering a reaction gas, the metal separators between the cells are adhered to form a cooling channel, a cooling channel entrance and a cooling channel exit are formed at the lower and upper ends of the separator, and the cooling water flowing into the entrance of the cooling channel moves through the cooling channel so as to be spread into the entire separator and so as to be discharged at the exit of the cooling channel, thereby flowing in the opposite direction of gravity. |
