Rechargeable lithium battery construction

H - Electricity – 01 – M

Patent

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H01M 6/46 (2006.01) H01M 2/16 (2006.01) H01M 6/18 (2006.01) H01M 10/04 (2006.01) H01M 10/40 (2006.01) H01M 6/30 (2006.01) H01M 6/42 (2006.01)

Patent

CA 2188131

A rechargeable lithium ion battery comprises a plurality of interleaved flexible electrolytic cells, each of which is a unitary planar laminated structure comprising polymeric anode (13), cathode (17), and intermediate electrolyte layers (15) disposed between electrically conductive anode (11) and cathode collector foil (19) elements. One of the collector foils (19) of a cell has an open grid structure to allow penetration of electrolyte solution into the cell layer while the other is substantially more continuous to provide supporting strength to the cell. At least a pair of cells (54, 58) having respective continuous foil anode and cathode collectors are interleaved in spiral-folded fashion to present the collector foils at the outer surface of the resulting structure to provide terminal contacts for the resulting high-capacity low-profile battery.

Une pile rechargeable possédant des ions de lithium comprend une pluralité de cellules électrolytiques, flexibles, imbriquées, chacune d'elles ayant une structure stratifiée plane, unitaire comprenant une anode polymère (13), une cathode (17), et des couches d'électrolyte intermédiaires (15) placées entre l'anode électroconductrice (11) et des feuilles collectrices cathodiques (19). L'une des feuilles (19) du collecteur d'une cellule présente une structure en grille ouverte, ce qui permet à la solution électrolytique de pénétrer dans la couche de la cellule, alors que l'autre est pratiquement plus continue afin de conférer une résistance de support à la cellule. Au moins deux cellules (54, 58) possédant une anode en feuilles continue respective et des collecteurs de la cathode sont imbriquées sous forme de spirale afin de présenter les feuilles du collecteur au niveau de la surface externe de la structure obtenue pour former des contacts terminaux destinés à une pile plate, de grande capacité.

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