CA1244875A - Method and protected material for making an electrical device - Google Patents

Method and protected material for making an electrical device

Info

Publication number
CA1244875A
CA1244875A CA000466824A CA466824A CA1244875A CA 1244875 A CA1244875 A CA 1244875A CA 000466824 A CA000466824 A CA 000466824A CA 466824 A CA466824 A CA 466824A CA 1244875 A CA1244875 A CA 1244875A
Authority
CA
Canada
Prior art keywords
metal
strip
protective material
lithium
protective
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000466824A
Other languages
French (fr)
Inventor
Robert H. Mcloughlin
George B. Park
John A. Cook
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raychem Ltd
Original Assignee
Raychem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raychem Ltd filed Critical Raychem Ltd
Application granted granted Critical
Publication of CA1244875A publication Critical patent/CA1244875A/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/06—Electrodes for primary cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/381—Alkaline or alkaline earth metals elements
    • H01M4/382—Lithium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/14—Cells with non-aqueous electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0002—Aqueous electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)
  • Primary Cells (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Vending Machines For Individual Products (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Glass Compositions (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

ABSTRACT

METHOD AND PROTECTED MATERIAL FOR
MAKING AN ELECTRICAL DEVICE

A method of making an electrical device, e.g. a lithium cell wherein protective material is removed from a sensitive material (e.g. lithium strip) during, after, or immediately before, incorporating the sensitive material in the device.
The protective material (preferably polymer film) may be peeled off the sensitive material or may be dissolved in liquid, preferably a liquid with which it comes in contact in the device. Articles comprising suitably protected sensitive material and apparatus for making the electrical devices automatically are also disclosed.

Description

~2~ 5 - 1 - RK201.
D R A W I N GS
1 _ S H E E T

METHOD AND PROTECTED MATERIAL FOR
MAKING AN ELECTRICAL DEVICE

This invention relates to a method of makinq electrical devices incorporating sensitive materials, and articles for use in such a method.

Sensitive materials, for example some electrode materials, are sensitive insoEar as they are difficult to handle during manufacture of electrical devices owing to physical weakness or high chemical reactivity, which may necessitate inconvenient handling procedures and~or special conditions such as dry room assembly.
Examples of such sensitive materials include alkali metals and alkaline earth metals, notably lithium metal electrodes for lithium cells~

Lithium metal is difficult to roll into thin strips for use as an electrode, and U.S. Patent No.
3721113 describes a method of alleviating this diffi-culty by rolling the lithium between smooth (surface asperities less than one micron) polymeric surfaces having sufficiently low critical surface tension to prevent adhesion to the lithium. The polymer may be a coating on the surface of rolls used to roll the lithium, or may be in the form of sheeting enclosing or facing the lithium, which does not adhere to the lithium and is peeled off the lithium strip after rolling. While thls method facilitates the rolling : ~.

.

lX~L~875
- 2 - RK201 operation, which produces the thirl lithium strip, it does not improve the efficiency of assembling the delicate lithium strip into electrical devices.
The present invention provides a method of making an electrochemical device which comprises:
(a) melt-extruding a tube of protective material around a strip of alkali or alkaline earth metal which is capable of functioning as an electrode in the device, so as to encapsulate the strip of metal;
(b) deforming the strip of metal while encapsulated by the protective material so as to increase its surface area substantially;
(c) removing the protective material during, after or immediately before incorporating the strip of metal in the device; and (d) incorporating the strip of metal in the device.
This introduction of protected sensitive metal electrode material into the electrochemical device assembly process leads to a number of advantages, especially with regard to automation of hitherto inefficient production processes for electrochemical devices.
It is an advantage of the present invention that the protected strip of metal may be used in a method wherein the protective strip is fed to apparatus which assembles portions of the metal into a plurality of the electrochemical devices.
Preferably the protective material is removed during the feeding of the protected strip to the apparatus, and the apparatus receives a substantially continuous feed of the protected strip and automatically removes the protective material and assembles successive portions of the strip of metal into a succession of the electrochemical devices. The advantages of such an automated process over the piece by-piece hand assembly method~ hitherto used for alkali metal or ~2~8~5
- 3 - RK201 alkaline earth metal electrode materials ~Jill be appreciated.
The protective material may be non-adherent to the metal electrode material, for example in the form of a tube surrounding the strip of the material. However, adherent protective material is preferred.
The method according to this invention can be used to assemble the opposing electrode materials and other com-ponents of the electrochemical device with fewer difficulties than are encountered in handling unprotected electrode materials. The anode or the cathode, or both, of suitable electrochemical devices, for example electrochemical cells, may be provided by way of the method according to this inven-tion, reactive metal anodes, especially lithium anodes, for electrochemical cells being an important practical applica-tion of the invention. The protected strips of metal used may include other components, for example current collector layers, or anti-passivation layers as known per se, adhering to part of the strip of metal e.g. on one major surface of a flat strip electrode. Such a current collector layer, for example, may provide permanent protection to one side of the electrode, with the removable protective material giving it desired temporary protection to the other side.

The protective material may be removed by liquid con-tact, for example contact with a liquid which is incorporated in the device, such as an electrolyte liquid. The protective material may be dissolved by the liquid. Alternatively, the ~, i - ~2D~
- 4 - RK201 protective material may be a coherent film which is peeled away from the strip of metal.
This invention is useful in relation to sensitive materials such as weak metals, by which is meant metal bodies having a lower tensile strength than an equal thickness of the protective material, especially lithium electrodes for lithium cells. Production of cells (preferably non-aqueous cells) having thin sheet electrodes of these and other materials, e.g., inherently conductive polymers, for example doped polyacetylenes or polypyrroles, or conductively filled polymers, can be facilitated by including the step of deforming the electrode material, for example by rolling, while in contact with the layer of protective material 90 as to decrease the thickness of the electrode material or other-wise alter its form or surface configuration. In this way, devices can be more conveniently assembled from thin sheets of lithium, for example of less than 0.25 millimetres, pre-ferably less than 0.125 millimetres, especially of about 0.075 millimetres thickness, which would otherwise be dif-ficult and expensive to make and assemble into such devices.
It is preferred that the sensitive material be malleable under temperatures and pressure~ which do not unacceptably damage the protective layer. The protective material may also be deformed, e.g. by the rolling operation, in a manner which will assist its subsequent removal from the sensitive material.

~ - ~

37~

_ 5 _ RK201 The invention includes articles comprising the polymer-protected strips of metal in forms especially suited to the method of the invention, for example articles in elongate strip form suitable for feeding to the assembly apparatus;
articles wherein cross-linked organic polymeric protective material is used; articles comprising the other components as aforementioned; articles wherein the protective material has been deformed in a manner which assists its subsequent remo-val; and articles wherein the strip of metal has been deformed as aforementioned. Suitable protective materials include organic materials preferably polymeric materials for example polymers of compounds with polymerizable double bonds and condensation polymers of condensable compounds.
Useful polymers of compounds with polymerizable double bonds may be selected from polymers of ethylenically unsa-turated hydrocarbons having 2 to 12 carbons, such as ethylene propylene, n-hexylene, n-dodecene or 4-tert butylstyrene and of vinyl ethers such as methyl or ethyl vinyl ether.
Preferred among these compounds are polyethylene and polypro-pylene due to their low cost.
Copolymers of the above monomeric compounds are also useful.
Useful condensation polymers may be selected from self-condensates of omega-amino-fatty acids and their lactams, such as condensation polymers from caprolactam and from ll-amino-undecanoic acid.

; .
' ~ :

The condensation polymers can be polyamides of diamines having 6 to 9 carbons and dicarboxylic acids having 6 to 10 carbons. Typical useful diamines include hexamethylene-diamine, nonamethylenediamine and aryldiamines such a m- and p-phenylenediamine. Typical useful dicarboxylic acids include adipic acid, suberic acid, azelaic acid, terephthalic acid and isophthalic acid. The preferred polyamide is the condensate of hexamethylenediamine and adipic acid, for reasons of general availability.
The condensation polymers can also be selected from polyesters of aryldicarboxylic acids such as phthalic, terephthalic and isophthalic acids and glycols having 2 to 6 carbons, such as ethylene, butylene and hexyleneglycols.
Useful solid polymeric compositions include ethylene/chlorotrifluoroethylene copolymers, poly (2-methylpropene), polypropylene, polyethylene, poly (4-tert-butylstyrene), poly(vinyl methyl ether), poly (6-aminocaproic acid), poly(11-aminoundecanoic acid), poly(ethyleneterephthalate), poly(decamethylene sebacamide), poly(heptamethylene pimelamide), poly(octamethylene suberamide), poly(nonamethylene azelaamide) and poly(hexarnethylene adipamide).
In electrochemical cells incorporating substantially non-aqueous polar liquids, the protective material may comprise polymers which are soluble in such liquids, polyethylene oxides being preferred although other polar polymers may be chosen according to their solubility in the liquid actually used ~```, ..

I

~2~4~7~i Liquids in such cell~, for example in lithium cellsJ may for example include various combinations of propylene car-bonate, dimethyl sulphoxide, gamma-butyrolactone, dimethyl formamide, acetonitrile, tetrahydrofuran, 1,2-dimethoxyethane and dioxolane Polyethylene oxides and other polar polymers may also be useful in cells incorporating aqueous liquids.

The protective polymeric materials will preferably be flexible and capable of adhering temporarily to the sensitive material, which may be assisted by suitable surface roughness of the polymer, for example surface asperities greater than one micron in height.

The invention includes the steps of making the protected article by a convenient method, for example by assembling together the strip of metal, and at least one layer of the protective material, either by surrounding the strip of metal with a non-adherent layer of the protective material, Por example by sealing together two strips of the protective material around the strip of metal; or preferably by adhering the protective material to the surface of the strip of metal, for example by melt extru~ion, pressure lamination, or soivent coating. The protective material preferably will not interact with the strip of metal, although beneficial interactions are not excluded from the invention. Cro s-linked protective materials, especially polym0rs cross-linked by ioni~ing radiation, may have beneficial temperature resiqtance and other properties, and may be easier to peel away from the electrode material than uncrosslinked material.

~29L~8~
~ - 8 - RK201 -Examples of the preparation of electrode materials in assembly with the protective polymer layer will now be described to i,llustrate the invention.

Lithium metal (supplied by Foote Mineral Co.) was encap-sulated with polyethylene in a continuous process. Lithium tape, 0.25 millimetres thick and 37 millimetres wide was passed through a crosshead die on a single screw extruder (Baughn 32mm diam screw 25:1 L/D ratio) and a tube oP
polyethylene extruded around the lithium.
The tube was drawn down and laminated with the lithium by passing the lithium plus polyethylene between nip rolls.
The total thickness of the three layered laminate was 0.75 millimetres i.e. 0.25 millimetres polyethylene on either side of the lithium. , ,The polyethylene coating provided protection for lithium against the environment during storage and during rolling to reduce the lithium thickness to 0.075 millimetres prior to use in battery manu-facture. Removal of the protective polymer during assembly into a lithium cell revealed shiny unreacted lithium metal.
This precedure was followed with ~DYNH-3, a low density polyethylene from Union Carbide and ~clair ~405 a linear medium density polyethylene from Du Pont, The laminates were prepared in a dry environment and the cell wa~ assembled in a similar environment.
EXhMPLE 2 Automated cell assembly is demonstrated by feeding a strip of the pro,tected lithium to apparatus illustrated sche-matically in the accompanying drawing.

* Trade Mark ,~.~
~' ' ~2~7~;i - g - RK201 Referring to the drawing, a strip (l) of lithium anode material protected by polymeric protective material according to the invention is fed from a supply roll (2) via feed rolls (3) to stripping rolls (4), where the protective material (5) is taken off onto collector rolls (6), and thence to lay-up rolls (7) where a strip (8) of porous electrode separator material from supply rolls 9 is aligned with each side of the lithium strip. This assembly then passes to lay-up rolls 10 where a strip of cathode material (ll) from feed roll (12) is closely aligned with the lithium anode separator assembly, the separator material previously aligned with the lithium anode being between the anode and the cathode. The aligned andoe/cathode assembly then pro-ceeds to a spool threading unit (13) and thence to a spool winding unit (14) wherein the assembly is coiled or spooled to provide a coiled electrode assembly. The coiled assembly then passes to the spool casing unit (15), where the coiled assembly is sealed in a cell casing together with suitable electrolyte liquid. Suitable practical embodiments of the production equipment thus schematically described can readily be devised, and it will be understood that removal of the protective layer from only one side of the electrode strip is acceptable where the other side carries a coating such as a current collector layer which itself provides adequate pro-tection without an overlying protective layer.

Example ~ was repeated using polyethylene oxide ~WSR
N750 from Union Carbide) in place oP the polyethylene, and the encapsulating polyethylene oxide was removed from a portion of the lithium by dissolving it in a typical electrolyte solution for lithium cells, viz. 1M LiC104 in a 50:50 mixture of 1, 2-dlmethoxyethane and propylene carbonate.

* Trade Mark ~.2~

The encapsulated lithium produced in Example 3 was incorporated in a cell in a manner similar to than described in Example 2, except that the encapsulating polyethylene oxide was not removed at the stripper rolls (4) and was incorporated in the cell for subsequent removal by dissolu-tion in the cell electrolyte liquid.

Claims (9)

The embodiments of the invention in which an exclu-sive property or privilege is claimed are defined as follows:
1. A method of making an electrochemical device which comprises:
(a) melt-extruding a tube of protective material around a strip of alkali or alkaline earth metal which is capable of functioning as an electrode in the device, so as to encapsulate the strip of metal;
(b) deforming the strip of metal while encap-sulated by the protective material so as to increase its surface area substantially;
(c) removing the protective material during, after or immediately before incorporating the strip of metal in the device; and (d) incorporating the strip of metal in the device.
2. A method according to claim 1, wherein the strip of metal is fed to apparatus which assembles portions of the strip of metal into a plurality of the electrochemical devi-ces.
3. A method according to claim 2, wherein the protec-tive material is removed during the feeding of the strip of protected metal to the apparatus.
4. A method according to claim 3, wherein the apparatus receives a substantially continuous feed of the strip of pro-tected metal and automatically removes the protective material and assembles successive portions of the metal into a succession of the electrochemical devices.
5. A method according to any of claims 1 to 3, wherein the protective material is removed by contact with liquid.
6. A method according to claim 1, wherein the protec-tive material is removed by contact with liquid incorporated in the device.
7. A method according to claim 6, wherein the liquid is a substantially non-aqueous polar liquid and the protective material comprises polyethylene oxide.
8. A method according to any of claims 1 to 3, wherein the strip of protective metal includes at least one addi-tional material in addition to the strip of metal and the removable protective material, the additional material being capable of functioning as another component of the said electrochemical device.
9. A method according to any of claims 1 to 3, wherein the metal comprises lithium.
CA000466824A 1983-11-02 1984-11-01 Method and protected material for making an electrical device Expired CA1244875A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8329207 1983-11-02
GB838329207A GB8329207D0 (en) 1983-11-02 1983-11-02 Making electrical device

Publications (1)

Publication Number Publication Date
CA1244875A true CA1244875A (en) 1988-11-15

Family

ID=10551084

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000466824A Expired CA1244875A (en) 1983-11-02 1984-11-01 Method and protected material for making an electrical device

Country Status (11)

Country Link
EP (1) EP0147929B1 (en)
JP (1) JPS60115168A (en)
KR (1) KR850003822A (en)
AT (1) ATE54039T1 (en)
AU (1) AU575597B2 (en)
CA (1) CA1244875A (en)
DE (1) DE3482565D1 (en)
GB (2) GB8329207D0 (en)
IL (1) IL73397A (en)
IN (1) IN163424B (en)
ZA (1) ZA8408595D (en)

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FR2616971A1 (en) * 1987-06-18 1988-12-23 Elf Aquitaine INTERMEDIATE ASSEMBLY FOR THE PRODUCTION IN THE FORM OF THIN FILMS OF A LITHIUM BATTERY, METHOD OF MAKING SAME, AND METHOD FOR PRODUCING THE ACCUMULATOR
JPH04126362A (en) * 1990-09-18 1992-04-27 Yuasa Corp Manufacture of sheet-shaped cell
CA2059228A1 (en) * 1992-01-13 1993-07-14 Guy St-Amant Differential adhesion making process for thin lithium patterns
WO2000077875A1 (en) * 1999-06-11 2000-12-21 Le Carbone Lorraine Method for making a multilayer structure for lithium polymer generators
US6585846B1 (en) * 2000-11-22 2003-07-01 3M Innovative Properties Company Rotary converting apparatus and method for laminated products and packaging
CN105489846B (en) * 2016-01-11 2018-03-20 宁德时代新能源科技股份有限公司 Pole piece lithium supplementing method and system
FR3118719B1 (en) * 2021-01-14 2023-01-06 Commissariat Energie Atomique LITHIUM METAL STRIP ROLLING DEVICE

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Also Published As

Publication number Publication date
GB8329207D0 (en) 1983-12-07
IN163424B (en) 1988-09-17
EP0147929A1 (en) 1985-07-10
GB2151069A (en) 1985-07-10
DE3482565D1 (en) 1990-07-26
KR850003822A (en) 1985-06-26
EP0147929B1 (en) 1990-06-20
IL73397A0 (en) 1985-02-28
IL73397A (en) 1987-11-30
AU3496284A (en) 1985-05-09
AU575597B2 (en) 1988-08-04
JPS60115168A (en) 1985-06-21
GB8427700D0 (en) 1984-12-05
ATE54039T1 (en) 1990-07-15
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