Closure assembly with low vapor transmission for...

H - Electricity – 01 – M

Patent

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Details

H01M 2/04 (2006.01) H01M 2/12 (2006.01) H01M 6/10 (2006.01) H01M 6/16 (2006.01)

Patent

CA 2726273

A closure assembly for an electrochemical cell including a container and an end assembly sealing an open end of the container in order to minimize mass or weight loss of the cell due to electrolyte vapor transmission is disclosed. The end assembly is provided with a vent member capable of venting a fluid when the pressure within the cell exceeds a predetermined limit; a contact member operatively in electrical contact with a conductive contact of the end assembly and a current collector of an electrode of the cell; and an insulating, polymeric seal member disposed at least between conductive components of the closure assembly having different polarities. In a preferred embodiment, the seal member has a selected dimensional ratio in order to minimize vapor transmission of the electrolyte through the seal member.

Linvention concerne un ensemble fermeture pour une cellule électrochimique comprenant un conteneur et un ensemble final permettant de sceller une extrémité ouverte du contenant afin de minimiser la perte de masse ou de poids de la cellule due à la transmission de vapeur électrolytique. Lensemble final est pourvu dun élément dévent capable de ventiler un fluide lorsque la pression dans la cellule dépasse une limite prédéterminée ; dun élément de contact fonctionnellement en contact électrique avec un contact conducteur de lensemble final et un collecteur de courant dune électrode de la cellule ; et dun élément détanchéité polymère isolant disposé au moins entre des composants conducteurs de lensemble de fermeture ayant différentes polarités. Dans un mode de réalisation préféré, lélément détanchéité possède un rapport de dimensions sélectionné afin de minimiser la transmission de vapeur de lélectrolyte par le biais de lélément détanchéité.

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