Method of making laminated polymeric rechargeable battery cells

H - Electricity – 01 – M

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H01M 10/04 (2006.01) H01M 4/62 (2006.01) H01M 10/00 (2006.01) H01M 6/18 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2371488

The dangers of short circuiting and lithium metal plating during recharging of a unitary laminate lithium ion intercalation battery cell (10) are alleviated by trimming the periphery of the cell (10) with a transverse slicing cut made at an angle from the perpendicular of the major plane surface of the cell (10). The resulting angled peripheral edges (26) of the cell provides greater edge separation between electrode layers (13, 17) and reduces the occurrence of metal plating accumulation of lithium ions at the edge surface (28) of the negative electrode (17).

Les dangers de court-circuit et d'électrodéposition de métal lithium pendant la recharge d'un élément d'accumulateur (10) d'intercalation unitaire stratifié à ions lithium sont réduits par découpage de la périphérie de l'élément (10) avec une découpe en tranche transversale effectuée à un angle donné à partir de la perpendiculaire de la surface de plan principal de l'élément (10). Les bords périphériques obtenus (26) de l'élément permettent d'obtenir une plus grande séparation des bords entre les couches d'électrodes (13, 17) et de réduire l'apparition d'une accumulation d'électrodéposition métallique d'ions lithium au niveau de la surface de bordure (28) de l'électrode négative (17).

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