End cover for battery cells

Details End cover for battery cells End cover for battery cells

H - Electricity

01

M

H01M 2/04 (2006.01) H01M 2/02 (2006.01) H01M 2/30 (2006.01) H01M 6/08 (2006.01) H01M 10/28 (2006.01)

Patent

CA 2295821

An electrochemical cell comprises a can having an open and a closed end, a contact terminal being located at the closed end. The terminal only covers a small part of the closed end of the can. The remainder of the end of the can may be covered by a label. By using a smaller contact terminal, the gap (19) (figures 1 and 2) provided between the positive cover (17) and the closed end (14) of can (15), to accommodate cell bulging, is substantially eliminated so that the length of the can may be increased without exceeding the standards established for overall battery length and allowing more active ingredients to be contained in the can, thereby increasing the service life of the electrochemical cell.

L'invention concerne une cellule électrochimique qui comporte un bac présentant une extrémité ouverte et une extrémité fermée, une borne de contact se trouvant à l'extrémité fermée. La borne ne recouvre qu'une petite partie de l'extrémité fermée du bac. Le reste de l'extrémité du bac peut être recouvert d'une étiquette. Par l'utilisation d'une borne de contact plus petite, l'espace vide (19) (Figures 1, 2) qui se trouve entre le couvercle positif (17) et l'extrémité fermée (14) du bac (15) et qui sert à absorber la dilatation de la cellule, est sensiblement éliminé, de manière que la longueur du bac puisse être augmentée sans dépasser les normes établies pour la longueur totale d'une cellule, tout en permettant au bac de contenir davantage d'ingrédients actifs, ce qui augmente la durée de vie de la cellule électrochimique.

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