Fuel cell separator plate with discrete fluid distribution...

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01)

Patent

CA 2392457

An electrically conductive, substantially fluid impermeable fuel cell separator plate comprises a substantially planar major surface for facing a fluid permeable fuel cell electrode, a fluid inlet through which a fluid may be directed to the planar major surface, a fluid outlet through which fluid may be removed from the planar major surface, and at least one discrete fluid distribution feature, such as a channel, formed in the planar major surface. Within the thickness of the plate, the fluid distribution feature is fluidly isolated from the fluid inlet and the fluid outlet, such that in a fuel cell assembly the reactant fluid must pass through the adjacent fluid permeable electrode to travel between the discrete fluid distribution feature and each of the fluid inlet and the fluid outlet.

Selon l'invention, une plaque de séparation de pile à combustible qui conduit l'électricité et est sensiblement imperméable aux liquides comprend une surface principale sensiblement plane destinée à être opposée à une électrode de pile à combustible perméable aux liquides; elle comprend aussi une entrée de liquides à travers laquelle un liquide peut être dirigé sur une surface principale plane, une sortie de liquides à travers laquelle le liquide peut être évacué depuis la surface principale plane et au moins un élément discret de distribution de liquides tel qu'un canal, formé dans la surface principale plane. A l'intérieur de l'épaisseur de la surface de la plaque, l'élément discret de distribution de liquides est isolé au niveau des liquides de l'entrée et de la sortie de liquides, de manière à ce que, dans un ensemble de pile à combustible, le liquide de réaction puisse passer à travers l'électrode adjacente perméable aux liquides pour se déplacer entre l'élément discret de distribution de liquides et l'entrée et de la sortie de liquides, respectivement.

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