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Patent US4897917A successfully refreshed from Google Patents.
US4897917A
Expired / Lapsed
US
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Method of assembling components of an electrochemical generator using thin films of lithium
Assignee: Hydro-Québec
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Filing: 1988-07-13
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Granted: 1990-02-06
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Expires: 2008-07-13
Abstract
Abstract In order to assemble the components of an electrochemical generator using lithium, which are in the form of thin films and comprise a lithium- or lithium alloy-based negative electrode and a solid polymer electrolyte with conduction using the lithium ion, an intermediate assembly is used which consists of a thin film of lithium supported by a film of inert plastic with controlled adhesion to the lithium, as a precursor of the negative electrode. This intermediate assembly can be produced, inter alia, by rolling a sheet of lithium between two films of inert plastic.
Inventors
- 👤 Michel Gauthier
- 👤 Andre Belanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:35
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/36; H01M4/38; H01M4/60; H01M4/602; H01M6/00; H01M6/14; H01M6/18; H01M6/181; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0082; H01M4/40; H01M4/405; H01M50/00; H01M50/40; H01M50/46; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49112; Y10T29/49115
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
182 words
A method for assembling the components of an electrochemical generator, wherein said components are in the form of thin films and comprise, as a first component, a lithium- or lithium alloy-based negative electrode and, as a second component, at least one thin film of a solid polymer electrolyte capable of conducting lithium ions, said method comprising: (i) using a negative electrode precursor which consists of an intermediate assembly formed from a thin film of lithium or lithium alloy supported by an inert plastic film having controlled adhesion to the lithium such that the bond of the lithium-based film to said inert plastic film is sufficient to permit the handling of said intermediate assembly but is less than the bond of the lithium film to the solid polymer electrolyte of the component containing said electrolyte; and (ii) applying the free metal surface of said intermediate assembly against said solid polymer electrolyte of the component containing said electrolyte by working these at a temperature and under a pressure sufficient to cause the lithium of said intermediate assembly to adhere to said solid polymer electrolyte.
Claim 2
Independent Claim
182 words
A method for assembling the components of an electrochemical generator, wherein said components are in the form of thin films and comprise, as a first component, a lithium- or lithium alloy-based negative electrode and, as a second component, at least one thin film of a solid polymer electrolyte capable of conducting lithium ions, said method comprising: (i) using a negative electrode precursor which consists of an intermediate assembly formed from a thin film of lithium or lithium alloy supported by an inert plastic film having controlled adhesion to the lithium such that the bond of the lithium-based film to said inert plastic film is sufficient to permit the handling of said intermediate assembly but is less than the bond of the lithium film to the solid polymer electrolyte of the component containing said electrolyte; and (ii) applying the free metal surface of said intermediate assembly against said solid polymer electrolyte of the component containing said electrolyte by working these at a temperature and under a pressure sufficient to cause the lithium of said intermediate assembly to adhere to said solid polymer electrolyte.
Claim 3
Dependent Claim
18 words
The method of claim 1, comprising (iii)separating totally or partially said plastic film from the lithium by peeling.
Claim 4
Dependent Claim
102 words
The method of claim 1, comprising (i) obtaining said intermediate assembly by rolling the lithium between two films of inert plastic material, one of which is very easily peelable and the other is said film having said controlled adhesion to the lithium, wherein said controlled adhesion is intermediate between the adhesion of the very easily peelable film to the lithium and the adhesion of the lithium to said solid polymer electrolyte; and (ii) applying the surface of said intermediate assembly bearing the very easily peelable film against said solid polymer electrolyte after said very easily peelable film has been removed by peeling.
Claim 5
Dependent Claim
35 words
The method of claim 1, comprising obtaining said intermediate assembly by depositing the thin film of lithium on the plastic film with controlled adhesion to the lithium by using a simple or assisted evaporating technique.
Claim 6
Dependent Claim
39 words
The method of claim 1, comprising obtaining said intermediate assembly by depositing the thin film of lithium on the plastic film with controlled adhesion to the lithium by using a technique for depositing the lithium in a melted state.
Claim 7
Dependent Claim
53 words
The method of claim 1, wherein the film of inert plastic material with controlled adhesion to the lithium is a polypropylene or polyethylene film, in which the surface in contact with the lithium film has been treated with the crown effect in order to provide it with the desired adhesion to the lithium.
Claim 8
Dependent Claim
25 words
The method of claim 1, comprising carrying out the application of the intermediate assembly onto said solid polymer electrolyte at a temperature below 60° C.
Claim 9
Dependent Claim
23 words
The method of claim 1, wherein the second component containing said solid polymer electrolyte film consists of a thin film of said electrolyte.
Claim 10
Dependent Claim
58 words
The method of claim 1, wherein the second component containing said solid polymer electrolyte film consists of a half-battery compound of a thin film positive electrode, one surface of which is covered with a film of polymer electrolyte, with the resulting assembly comprising a complete battery made up of a negative electrode and a lithium/solid polymer electrode/positive electrode.
Claim 11
Dependent Claim
36 words
The method of claim 9, comprising peeling, at least partially, the inert plastic film with controlled adhesion after producing the assembly, to provide for the collection of current or for the deposit of a metal collector.
Claim 12
Dependent Claim
24 words
The method of claim 1, wherein the thin film of lithium of the intermediate assembly has a thickness of between 1 and 50 microns.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |