Patent ID: 6245453
Filing Date: 2001-06-12
Classification: H01M,Y02E

Abstract:
A separator for a fuel cell, the separator being produced by bringing an electrolyte film into contact with a surface of a first electrode so that the electrolyte film is interposed between the first electrode and an adjacent electrode and by defining a gas passage for supplying gas to the fuel cell, the separator comprising:a first manifold for supplying gas, the first manifold extending thorough the separator at a first corner thereof;a second manifold for exhausting gas, the second manifold extending through the separator at a position on a diagonal line extending across the separator from the first corner; anda gas passage formed between the first manifold and the second manifold,wherein a width of the gas passage is wider at an intermediate position between the first and the second manifold than widths near the first manifold and near the second manifold, and wherein the gas passage has a branched portion, said branched portion including a plurality of passage branches and a plurality of cross passages, wherein the cross passages provide communication between two adjacent passage branches at a position other than at an inlet end and an outlet end of the passage branches, and further wherein an interval between at least one of pairs of adjacent passage branches and pairs of adjacent cross passages varies.