Membrane electrode assembly with integrated seal

Details Membrane electrode assembly with integrated seal Membrane electrode assembly with integrated seal

H - Electricity

01

M

H01M 8/10 (2006.01) H01M 2/08 (2006.01)

Patent

CA 2519951

A membrane electrode assembly with an improved integrated seal comprises an edge seal having an inboard pad attached to the edge of the electrodes, a flexible coupling adjacent the pad, and a sealing element adjacent the coupling. The sealing element is significantly thicker than the pad, and the flexible coupling isolates the pad from stress experienced in the sealing element. Thus, greater compression can be applied to the sealing element, thereby providing an improved and more reliable seal, without overly compressing and damaging the attached pad.

La présente invention concerne ensemble électrode à membrane avec joint intégré amélioré, qui comprend un joint de bord possédant un joint d'étanchéité intérieur fixé au bord des électrodes, un couplage souple contigu à ce joint d'étanchéité et, un élément d'étanchéité contigu à ce couplage. Cet élément d'étanchéité est considérablement plus épais que le joint d'étanchéité et le couplage souple isole le joint d'étanchéité de la contrainte exercée dans l'élément d'étanchéité. Une plus grande compression peut ainsi être appliquée à l'élément d'étanchéité, fournissant un joint amélioré et plus fiable, sans trop comprimer et abîmer le joint d'étanchéité attaché.

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