Pressure activated current interrupter for electrochemical...

Details Pressure activated current interrupter for electrochemical... Pressure activated current interrupter for electrochemical...

H - Electricity

01

M

H01M 2/00 (2006.01) H01M 2/34 (2006.01)

Patent

CA 2313796

The invention is directed to a pressure activated current interrupt assembly (10) for cells (5), particularly alkaline cells. The current interrupter is located at the closed end (20) of the cell's housing (15). The current interrupter assembly (10) comprises an electrically insulating member (50) in proximity to the terminal (12) at the closed end (20) of the housing (15). The insulating member (50) is in physical communication with a deflectable member (25) formed from the cell's housing. When gas pressure within the cell builds up to exceed a predetermined value, the deflectable member (25) deforms causing the insulating member (50) to protrude beyond the extremity of said cell terminal (12), thereby preventing electrical contact between said terminal (12) and the terminal of another cell or electrical device.

L'invention concerne un ensemble rupteur de courant (10) commandé par la pression et destiné à des piles (5), en particulier à des piles alcalines. Le rupteur de courant est situé sur l'extrémité fermée (20) de l'enveloppe (15) de la pile. L'ensemble rupteur de courant (10) comprend un élément d'isolation électrique (20) à proximité de la borne (12) située sur l'extrémité fermée (20) de l'enveloppe (15). L'élément d'isolation (50) est en communication physique avec un élément déformable (25) constitué à partir de l'enveloppe de la pile. Lorsque la pression gazeuse à l'intérieur de la pile s'accumule de sorte qu'elle dépasse une valeur prédéterminée, l'élément déformable (25) se déforme, ce qui a pour effet de pousser l'élément d'isolation (50) au-delà de l'extrémité de ladite borne (12) de la pile, empêchant ainsi tout contact électrique entre ladite borne (12) et la borne d'une autre pile ou d'un autre dispositif électrique.

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