Bonding electrochemical cell components

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 2/14 (2006.01) H01M 8/24 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2422432

The invention provides a method for preparing subassemblies for an electrochemical cell or a stack of electrochemical cells, particularly a stack of fuel cells for the direct generation of electricity. The method includes bonding together two or more electrochemical cell components, such as plates, frames, flow fields, shims, gaskets, membranes and the like, to form subassemblies used to make an electrochemical cell stack. The bonding can be accomplished using either polymeric bonds (i.e., adhesives) where polymer and/or metal components are involved or mettalurgical bonds (i.e., solder) where metal components are involved. The bonding provides tightly sealed cells and lower electronic contact resistances between components.

L'invention concerne un procédé de préparation de sous-ensembles destinés à une cellule électrochimique ou à une pile de cellules électrochimiques, notamment une pile de piles à combustible permettant la génération directe d'électricité. Le procédé consiste à assembler au moins deux composants de cellules électrochimiques, tels que des plaques, des cadres, des champs de courant, des cales, des joints d'étanchéité, des membranes et autres, pour former des sous-ensembles utilisés dans la formation d'une pile de cellules électrochimiques. L'assemblage peut être réalisé au moyen de liaisons polymères (c'est-à-dire d'adhésifs) impliquant des composants polymères et/ou métalliques ou de liaisons métallurgiques (c'est-à-dire de soudure) impliquant des composants métalliques. L'assemblage produit des cellules hermétiques et des résistances de contact électroniques plus faibles entre les composants.

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