| 摘要 |
PROBLEM TO BE SOLVED: To compensate the output reduction due to a decrease in the surface area of an electrode by distributing an air passage groove of a positive electrode separator, a fuel passage groove of a negative electrode separator and a cooling water passage groove of a cooling water separator over the whole surface of each separator with a continuous line pattern, those separators being an internal manifold type. SOLUTION: In this fuel cell stack, an internal manifold is bored in the same pattern; the manifold is constituted of an air inlet 2 and an air outlet 7 in a positive electrode separator 1, a fuel inlet 4 and a fuel outlet 5 in a negative electrode separator, a cooling water inlet 6 and a cooling water outlet 3 in a cooling water separator. Six manifolds are provided on positive and negative electrodes as the same pattern. Passage grooves are formed with a continuous line pattern by a presswork or the like so as to be distributed between each inlet and outlet allover the surface of the separators. A water-repellent material such as Teflon is coated on the internal surface of the passage grooves for preventing the passage clogging due to the generation of water drops. A plurality of passage grooves of each separator is disposed to improve functions of the passage grooves. An electrode corresponding area is increased by 40% and an output capacity is raised. |
