Battery constructions having reduced collector assembly volume

H - Electricity – 01 – M

Patent

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Details

H01M 4/75 (2006.01) H01M 2/02 (2006.01) H01M 2/04 (2006.01) H01M 2/08 (2006.01) H01M 2/12 (2006.01) H01M 2/32 (2006.01) H01M 6/08 (2006.01) H01M 4/70 (2006.01) H01M 6/06 (2006.01)

Patent

CA 2340684

An electrochemical cell is provided that includes: a can for containing electrochemically active materials including at least positive and negative electrodes and an electrolyte, the can having an open end a closed end; and a collector assembly positioned across the open end of the can, the collector assembly having a collector and a cover, the collector assembly defining a collector assembly volume. In one embodiment, the collector assembly volume is less than 5.0 percent of the total volume of the battery. In other embodiments, the collector assembly volume is less than 5.0 percent (D-sized batteries), less than 6.0 percent (AA-sized batteries) and less than 7.0 percent (C- and AAA-sized batteries) of the total internal volume. In further embodiments, the collector assembly volume is less than 2.5 cm3 (D-sized batteries), less than 1.7 cm3 (C-sized batteries), less than 0.50 cm3 (AA- sized batteries) and less than 0.24 cm3 (AAA-sized batteries).

L'invention concerne une cellule électrochimique qui comporte : une boîte pour contenir des matières actives d'un point de vue électrochimique, y compris au moins des électrodes positive et négative et un électrolyte, la boîte présentant une extrémité ouverte et une extrémité fermée; et un ensemble collecteur placé sur l'extrémité ouverte de la boîte, l'ensemble collecteur comportant un collecteur et un couvercle, et définissant un volume d'ensemble collecteur. Dans un mode de réalisation, le volume de l'ensemble collecteur constitue moins de 5 pour cent du volume total de la batterie. Dans d'autres modes de réalisation, le volume de l'ensemble collecteur constitue moins de 5 pour cent (batteries de taille D), moins de 6,0 pour cent (batteries de taille AA) et moins de 7,0 pour cent (batteries de tailles C et AAA) du volume interne total. Dans d'autres modes de réalisation encore, le volume de l'ensemble collecteur est inférieur à 2,5 cm?3¿ (batteries de taille D), inférieur à 1,7 cm?3¿ (batteries de taille C), inférieur à 0,50 cm?3¿ (batteries de taille AA), et inférieur à 0,24 cm?3¿ (batteries de taille AAA).

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