Reinforced coiled electrode assemblies and methods of...

H - Electricity – 01 – M

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H01M 2/26 (2006.01) H01M 4/80 (2006.01) H01M 6/10 (2006.01)

Patent

CA 2298791

The present invention relates to coiled electrode assemblies having conductive tabs, methods of attaching the conductive tabs to the coiled electrode, and electrochemical cells employing such assemblies. An electrode plate which is coated with active material has a designated area for tab attachment. The conductive tab area's active material is pierced with opposing, offset piercing plates which have raised surface probes which penetrate the conductive tab area's coating and substrate. This tab area is cleared of active material and reinforced with a reinforcing material and a conductive tab is welded to the thus treated area resulting in an electrode plate having a strong integrated tab assembly.

La présente invention concerne des ensembles électrodes bobinées possédant des languettes conductrices, des procédés de fixation de ces languettes sur l'électrode bobinée, ainsi que des piles électrochimiques mettant en oeuvre de tels ensembles. Une plaque d'électrode, revêtue d'une matière active, présente une zone conçue pour une fixation de languette. La matière active de la zone de languette conductrice est percée au moyen de plaques de perçages décalées présentant des sondes de surface saillantes qui pénètrent dans le revêtement et le substrat de la zone de la languette conductrice. On enlève de cette zone toute matière active, on la renforce à l'aide d'une matière de renforcement et on soude la languette conductrice sur la zone ainsi traitée, ce qui permet d'obtenir une plaque d'électrode possédant un ensemble languettes intégrées résistantes.

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