Unitized fuel cell assembly

Details Unitized fuel cell assembly Unitized fuel cell assembly

H - Electricity

01

M

H01M 8/24 (2006.01)

Patent

CA 2505838

A unitized fuel cell assembly includes a first flow field plate, a second flow field plate, and a membrane electrode assembly (MEA) provided between the first and second flow field plates. A hard stop arrangement, in one configuration, is provided between the first and second flow field plates. The hard stop arrangement is dimensioned to limit compressive forces imparted to the MEA upon establishment of contact between the first and second flow field plates under pressure. A sealing arrangement is provided between the first and second flow field plates and peripheral to the MEA. The unitized fuel cell assembly is configured as a stand-alone fuel cell unit that can be used alone or in a stack of fuel cell units.

L'invention concerne un ensemble pile à combustible qui comprend des première et seconde plaques de champ de flux, et un ensemble électrode à membrane entre ces plaques. Un arrangement d'arrêt dur, selon une configuration, est prévu entre lesdites plaques. Il est dimensionné pour limiter les forces de compression exercées sur l'ensemble électrode à membrane, à l'établissement d'un contact entre les plaques en question sous l'effet d'une pression. Un arrangement d'étanchéité est prévu entre les mêmes plaques et à la périphérie de l'ensemble électrode à membrane. L'ensemble pile à combustible unitaire considéré est conçu comme une unité de pile à combustible autonome susceptible d'être utilisée isolément ou dans une pile d'unités de pile à combustible.

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