Electrolyte activatable lithium-ion rechargeable battery...

H - Electricity – 01 – M

Patent

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Details

H01M 10/36 (2006.01) H01M 2/16 (2006.01) H01M 6/18 (2006.01) H01M 6/32 (2006.01) H01M 6/46 (2006.01) H01M 10/04 (2006.01) H01M 10/40 (2006.01) H01M 6/30 (2006.01) H01M 6/42 (2006.01)

Patent

CA 2177361

Li-ion rechargeable battery cell electrode (13, 17) and electrolyte/separator (15) elements formulated as layers of plasticized polymeric matrix compositions are laminated to form a unitary battery cell structure. The structure may be stored indefinitely, since it is essentially devoid of electrolyte solution which typically comprises a moisture-sensitive lithium salt. Prior to the battery's being put into service, the plasticizer of the polymeric composition is removed by extracting with a selective solvent and is replaced with a lithium salt electrolyte solution by simple imbibition. The battery thus activated may then be charged and recharged in the usual manner.

La présente invention concerne un élément de batterie rechargeable dont les électrodes (13, 17) sont à ions de lithium, et dont les constituants d'électrolyte/séparateur (15) sont composés de couches à composition matricielle en polymères plastifiés. L'empilement de ces constituants forme une structure monobloc d'élément de batterie électrique. Cette structure peut être stockée indéfiniment puisqu'elle est essentiellement exempte de solution d'électrolyte. Or les électrolytes sont généralement à base d'un sel de lithium sensible à l'humidité. Avant la mise en service de la batterie électrique, le plastifiant est éliminé au moyen d'un solvant sélectif et remplacé par une solution d'électrolyte au sel de lithium par simple imbition. La batterie électrique est ainsi rendue active et elle se charge et se recharge de façon traditionnelle.

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