Rollback inner cover

Details Rollback inner cover Rollback inner cover

H - Electricity

01

M

319/110

H01M 2/04 (2006.01) H01M 2/08 (2006.01) H01M 2/30 (2006.01) H01M 4/75 (2006.01) H01M 12/06 (2006.01)

Patent

CA 2037332

A cover for a galvanic cell having a reverse curved peripheral edge and a substantially centrally disposed upstanding wall bounding an aperture. A sealing member is positioned below the cover and has a tubular hub which projects through the aperture in the cover and a skirt that electrically insulates the edge of the cover. An electrically conductive fastener is positioned in the tubular hub on the sealing member which tends to cause the edge of the tubular hub to roll or "mushroom" when the electrically conductive fastener is peeved or clinched in place. The rolled tubular hub tightly locks the fastener and the cover together while the edge of the cover presses against the inner wall of the container holding the components of the galvanic cell. The pressure tends to slightly bow the cover enabling it to stay in a tightly sealed condition under both physical and thermal stress. A galvanic cell incorporating the cover is also disclosed.

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