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Process for cutting polymer electrolyte multi-layer batteries and batteries obtained thereby

United States Patent

September 9, 2003
View the Complete Patent at the US Patent & Trademark Office
A stacking of battery laminate is prepared, each battery consisting of anode, polymer electrolyte, cathode films and possibly an insulating film, under conditions suitable to constitute a rigid monoblock assembly, in which the films are unitary with one another. The assembly obtained is thereafter cut in predetermined shape by using a mechanical device without macroscopic deformation of the films constituting the assembly and without inducing permanent short circuits. The battery which is obtained after cutting includes at least one end which appears as a uniform cut, the various films constituting the assembly having undergone no macroscopic deformation, the edges of the films of the anode including an electronically insulating passivation film.
Gauthier; Michel (La Prairie, CA), Lessard; Ginette (Longueuil, CA), Dussault; Gaston (St-Benoit-de-Mirabel, CA), Rouillard; Roger (Beloeil, CA), Simoneau; Martin (Montreal, CA), Miller; Alan Paul (Woodbury, MN)
Hydro-Quebec (Montreal, CA), Minnesota Mining and Manufacturing Company (St. Paul, MN)
09/ 393,493
September 10, 1999
GOVERNMENT LICENSE RIGHTS The Government of the United States of America has rights in this invention pursuant to Cooperative Agreement No. DE-FCO2-91CE50336 awarded by the U.S. Department of Energy.