Improvements in gaskets and bipolar plates for pem fuel cells

Details Improvements in gaskets and bipolar plates for pem fuel cells Improvements in gaskets and bipolar plates for pem fuel cells

H - Electricity

01

M

H01M 8/02 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2693857

A bipolar plate (1) in combination with a sealant (50, 70) for a PEM fuel cell, wherein the bipolar plate (1) has an anode side with first flow channels (20) for transport of a proton-donating fuel or a cathode side with second flow channels (12) for transport of proton-accepting fluid, or both, wherein a sealant (50, 70) is provided parallel with the bipolar plate (1) for sealing the bipolar plate against an adjacent electrolytic membrane (40). The sealant (50, 70) has fluid channels (54a, 54b, 74a, 74b) across the sealant (50, 70) for transport of proton-donating fuel or proton-accepting fluid, respectively, across the sealant and along the bipolar plate.

La présente invention concerne une plaque bipolaire (1) en combinaison avec un joint d'étanchéité (50, 70) pour une pile à combustible d'électrolyte à membrane polymère, ladite plaque bipolaire (1) comportant un côté anode avec des premier canaux d'écoulement (20) pour le transport d'un combustible donneur de protons ou un côté cathode avec des seconds canaux d'écoulement (12) pour le transport de fluide accepteur de protons, ou les deux, la joint d'étanchéité (50, 70) est prévu en parallèle à la plaque bipolaire (1) pour sceller la plaque bipolaire contre une membrane d'électrolyte adjacente (40). Le joint d'étanchéité (50, 70) comporte des canaux de fluide (54a, 54b, 74a, 74b) traversant le joint d'étanchéité (50, 70) pour le transport de combustible donneur de protons ou de fluide accepteur de protons, respectivement, à travers le joint d'étanchéité et le long de la plaque bipolaire.

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