Prismatic battery housing

H - Electricity – 01 – M

Patent

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Details

H01M 2/04 (2006.01) H01M 2/02 (2006.01) H01M 2/06 (2006.01) H01M 2/12 (2006.01) H01M 2/36 (2006.01)

Patent

CA 2322897

The invention features a prismatic battery (10) with an electrically conductive housing comprising an elongated, prismatic can (12) with an open end, and a housing cover (16) pressed into the open end of the can (12) and welded in place. The novel cover (16) has an outer flange (34) about its periphery, extending generally in the direction of extensions of the sides of the can, which elastically deflects as the cover is pressed into the can to provide good contact for welding. The cover has two raised bumps (36) forming internal pockets that are part of the internal volume of the cell. The bumps are also arranged to prevent rotation of the seal/vent assembly (18, 20, 22, 24, 26). One embodiment includes a plugged fill hole (46) in one of the bumps (36). Corresponding methods of manufacture are also disclosed.

Cette invention concerne une pile prismatique (10) comprenant une enveloppe conductrice d'électricité constituée d'un boîtier (12) prismatique allongé ayant une extrémité ouverte, et un couvercle (16) qui est comprimé dans l'extrémité ouverte du boîtier et soudé dans cette configuration. Le nouveau couvercle (16) comporte un rebord extérieur (34) situé autour de sa périphérie, qui s'étend globalement dans le sens d'extension des côtés du boîtier et qui se déforme élastiquement lorsque le couvercle est appuyé dans le boîtier pour assurer un bon contact pour la soudure. Le couvercle présente deux protubérances verticales (36) formant des zones en creux qui font partie du volume intérieur de la pile. Les protubérances sont également disposées de manière à empêcher l'ensemble joint/lumière (18, 20, 22, 24, 26) de tourner. Dans une forme de réalisation, une des protubérances (36) comprend un trou (46) de remplissage bouché. On décrit également des procédés de fabrication associés.

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