Electrochemical fuel cell stack with compression bands

Details Electrochemical fuel cell stack with compression bands Electrochemical fuel cell stack with compression bands

H - Electricity

01

M

H01M 8/24 (2006.01)

Patent

CA 2271706

An electrochemical fuel cell stack includes a plurality of fuel cell assemblies interposed between a pair of end plate assemblies (115, 120). The mechanism for securing the stack in its compressed, assembled state includes at least one compression band (130) which circumscribes the end plate assemblies and interposed fuel cell assemblies of the stack. Preferably, at least one of the end plate assemblies comprises a resilient member which cooperates with each compression band to urge the first end plate assembly toward the second end plate assembly, thereby applying compressive force to the fuel cell assemblies to promote sealing and electrical contact between the layers forming the fuel cell stack.

Cet empilement de piles à combustible électrochimique comprend une pluralité d'ensembles piles à combustible placés entre une paire d'ensembles plaques d'extrémité (115, 120). Le mécanisme destiné à assujettir l'empilement et à le maintenir à l'état serré et assemblé, comprend au moins une bande de serrage (130), laquelle entoure les ensembles plaques d'extrémité et les ensembles piles de l'empilement. De préférence, l'un des ensembles plaques d'extrémité, au moins, comprend un élément élastique coopérant avec chaque bande de serrage, afin de pousser le premier ensemble plaques d'extrémité vers le second ensemble plaques d'extrémité, appliquant ainsi une force de compression sur les ensembles piles à combustibles, afin de favoriser l'étanchéité et le contact électrique entre les couches formant ledit empilement.

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