Compression mechanism for an electrochemical fuel cell assembly

H - Electricity – 01 – M

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H01M 8/24 (2006.01) F16F 1/02 (2006.01) F16F 1/377 (2006.01)

Patent

CA 2428188

A compression mechanism comprises a planar spring sheet having a plurality of openings rendering the spring sheet resilient. An electrochemical fuel cell assembly with resilient compression mechanism includes a plurality of fuel cell assemblies interposed between first and second endplates. The mechanism for securing the fuel cell assemblies in their assembled, compressed state includes at least one resilient compression spring sheet (310, 320) extending between first and second endplates (340, 350). Each of the spring sheets urge the first endplate towards the second endplate, thereby applying compressive force to the fuel cell assemblies to promote sealing and electrical contact between the layers of the assemblies. Each spring sheet may be joined at one or both ends to another corresponding opposite spring sheet.

L'invention concerne un mécanisme de compression qui comprend une plaque ressort plane comportant une pluralité d'ouvertures qui augmentent son élasticité. L'invention concerne également un assemblage de piles à combustible électrochimiques comprenant un mécanisme de compression élastique et se composant d'une pluralité d'ensembles de piles à combustibles intercalés entre la première et la seconde plaque d'extrémité. Le mécanisme permettant de retenir les assemblages de piles à combustible à l'état assemblé et comprimé comprend au moins une plaque ressort de compression élastique qui s'étend entre la première et la seconde plaque d'extrémité. Chaque plaque ressort pousse la première plaque d'extrémité en direction de la seconde plaque d'extrémité, appliquant ainsi une force compressive sur les ensembles de piles à combustibles afin de favoriser l'étanchéité et le contact électrique entre les différentes couches des ensembles. Chaque plaque ressort peut être assemblée par une ou plusieurs extrémités à une plaque ressort opposée correspondante.

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