Method of treating contact lead-wire on electrochemical cell so as to improve its sealing property and obtained sealed electrochemical cell

Application Number: 00107046
Application Date: 2000.03.22
Publication Number: 1291802
Publication Date: 2001.04.18
Priority Information: 1999/3/22 US 60/125,638
International: H01M10/04;H01M10/34
Applicant(s) Name: Thomas-Bets International Corp.
Inventor(s) Name: L. She;M. Alamoog;P.L. Tambleno
Patent Agency Code: 31100
Patent Agent: li xiang
Abstract The present invention provides a method of hermetically sealing an electrochemical cell. In the disclosed method, a coating of an adhesive composition is applied to an external metal tab that serves as a contact lead from the cell to a device within which the cell is employed. The adhesive coats and hermetically seals the tab surface thereby. The coating process can be executed by directly heat-sealing an adhesive film onto the tab surface. Alternatively, an aqueous suspension of the adhesive composition can be sprayed onto the tab surface, or the tab may be roll coated in the composition and thereafter subjected to heat treatment, causing the adhesive to melt and flow. The coated tab is thereafter welded to a corresponding current collector in the form of a metal foil. The complete cell assembly is heat-sealed in a final closure sealing member such that the sealed tabs extend therethrough.