Battery cells having improved power characteristics and...

H - Electricity – 01 – M

Patent

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Details

H01M 4/00 (2006.01) H01M 2/18 (2006.01)

Patent

CA 2537690

A battery cell, such as a cylindrical or prismatic alkaline cell, is disclosed having significantly improved capacity utilization at high discharge rates while maintaining much of the energy content and other feature advantages of typical cylindrical or prismatic alkaline cells, by implementing a novel cell construction that produces increased surface area between the anode and cathode. One particular characterization of the cell construction of the present invention comprises an electrochemical battery cell comprising a cell housing defining an interior space having an interior surface, a first terminal and a second terminal. The cell further comprises an inner electrode encapsulated by a separator and disposed within the interior space of the housing. The inner electrode comprises a substantially flat material in a folded configuration and formed such that an outer extent of the inner electrode is generally conforming to a contour defined by the interior surface of the cell housing. The inner electrode is in electrical communication with the second terminal of the housing. An outer electrode is disposed within the interior space of the housing such that it is in ionic communication with the inner electrode and in electrical communication with the first terminal of the cell housing. Other aspects of the present invention are also disclosed, including various other embodiments and methods of manufacturing.

L'invention concerne une pile, telle qu'une pile cylindrique ou prismatique, présentant une utilisation de capacité améliorée de manière significative à taux de décharge élevé, tout en maintenant la plupart du contenu d'énergie et d'autres caractéristiques de piles alcalines prismatiques ou cylindriques, grâce à la mise en place d'une nouvelle construction de pile qui produit une surface active améliorée entre l'anode et la cathode. Une caractérisation particulière de la construction de la pile de l'invention comprend une pile électrochimique comprenant un logement de pile définissant un espace intérieur d'une surface interne, un premier terminal et un second terminal. La pile comprend, de plus, une électrode interne encapsulée par un séparateur et disposée à l'intérieur du logement. L'électrode interne comprend une matière sensiblement plate, en configuration pliée, et formée, de sorte qu'une extension extérieure de l'électrode interne est conforme généralement à un contour défini par la surface interne du logement de la pile. L'électrode interne est en communication électrique avec le second terminal du logement. Une électrode externe est disposée à l'intérieur du logement, de sorte qu'elle est en communication ionique avec l'électrode interne et en communication électrique avec le premier terminal du logement de la pile. L'invention concerne également d'autres aspects, notamment de nombreux modes de réalisation et des procédés de fabrication de ladite pile.

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