Staged flow channels for fuel cell

H - Electricity – 01 – M

Patent

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Details

H01M 8/04 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2323147

A PEM fuel cell having serpentine flow field channels comprising a plurality of serially-linked serpentine segments extending between inlet and exhaust manifolds. Each segment has an inlet leg, an exit leg, at least one medial leg therebetween and hairpin curved ends connecting the medial leg(s) to other legs of the segment. A bridging section of each flow channel connects adjacent segments of the same channel one to the next. The hairpin-curved ends of the medial legs are spaced from bridging sections by different distances depending on the difference in pressure in the bridging section and the hairpin-curved ends.

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