US 6,616,714 B1 · Process for cutting polymer electrolyte multi-layer batteries and batteries obtained thereby

Abstract

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.

Claims15

Dependent claims

A process for preparing solid lithium electrochemical generators comprising the steps of:

(a) preparing a battery laminate comprising a lithium anode film, a polymer electrolyte film, a cathode film and a current collector film;
(b) cutting said battery laminate with a mechanical cutting means comprising means selected from the group consisting of solids, liquids, and mixtures thereof, thereby exposing a cut edge of said battery laminate;
and
(c) applying a reactive fluid selected from the group consisting of water, alcohol, halogenated compounds, sulfured compounds and oxygenated compounds onto said cut edge to electrically insulate an exposed edge of said lithium anode film from an exposed edge of said cathode film so as to prevent electrical short circuits between said anode film and said cathode film.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

09/393,493Filed 10 Sep 1999 · continuation in part

Priority

14 Sep 1998

Granted

9 Sep 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

H01M 10/0436
Construction or manufacture in general: small-sized flat cells or batteries for portable equipment
H01M 10/052
Accumulators with non-aqueous electrolyte: li-accumulators
H01M 10/054
Accumulators with non-aqueous electrolyte: accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
H01M 10/0565
The electrolyte being constituted of organic materials only: polymeric materials, e.g. gel-type or solid-type

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

Life of this patent

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

Life of this patent

Abstract

Claims15