Patent EP0143566A2 successfully refreshed from Google Patents.
EP0143566A2
Expired / Lapsed
EP
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Protection of sensitive material
Assignee: Scimat Ltd
•
Filing: 1984-11-02
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Granted: —
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Expires: 2004-11-02
Abstract
Abstract Sensitive material, e.g. lithium, for lithium cell electrodes, is protected by providing relatively fluid-impermeable material, e.g. polyethylene, to protect the sensitive material and altering the physical structure of the protective material, preferably by stretching at the same time as thinning the lithium or other sensitive material, to render it relatively fluid-permeable, preferably so as to serve as an electrode separator when the protected lithium is incorporated in a cell.
Inventors
- 👤 John Anthony Cook
- 👤 George Barry Park
- 👤 Rober Hamilton Mcloughlin
- 👤 Stephen Edward Myers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:28
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; B; B01; B01J; B01J33/00; H01M10/00; H01M4/06; H01M4/36; H01M4/38; H01M4/381; H01M4/382; H01M6/00; H01M6/04; H01M6/06; H01M6/10; H01M6/14; H01M6/30; H01M6/36; H01M2004/026; H01M2004/027; H01M50/00; H01M50/40; H01M50/46; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49112
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
69 words
A method of making an article comprising a body of sensitive material at least part of which body is protected by fluid-permeable protective material, comprising the steps of (a) providing a body of sensitive material at least part of which is protected by relatively fluid-impermeable protective material and (b) altering the physical structure of the protective material in situ to render it relatively fluid-permeable without significantly altering its composition.
Claim 2
Independent Claim
69 words
A method of making an article comprising a body of sensitive material at least part of which body is protected by fluid-permeable protective material, comprising the steps of (a) providing a body of sensitive material at least part of which is protected by relatively fluid-impermeable protective material and (b) altering the physical structure of the protective material in situ to render it relatively fluid-permeable without significantly altering its composition.
Claim 3
Dependent Claim
33 words
A method according to claim 1, wherein the protective material before the alteration of its structure is sufficiently impermeable at least to hinder significantly the intended end use function of the sensitive material.
Claim 4
Dependent Claim
42 words
A method according to claim 2, wherein the protective material is sufficiently impermeable substantially to prevent the sensitive material from performing its intended end use function and requires the alteration of its structure to render it sufficiently permeable to perform that function.
Claim 5
Dependent Claim
34 words
A method according to claim 1, 2 or 3, wherein the protective material is substantially non-porous in its relatively fluid-impermeable state and its structure is altered to render it porous and therefore relatively fluid-permeable.
Claim 6
Independent Claim
24 words
A method according to any of the preceding claims, wherein the body of sensitive material is at least partly coated with the protective material.
Claim 7
Independent Claim
29 words
A method according to any of the preceding claims, wherein the body pf sensitive material is at least partly enclosed by a non-adherent self-supporting layer of the protective material.
Claim 8
Independent Claim
17 words
A method according to any of claims 1 to 6, wherein the protective material comprises polymeric material.
Claim 9
Dependent Claim
14 words
A method according to claim 7, wherein the protective material comprises cross-linked polymeric material.
Claim 10
Dependent Claim
14 words
A method according to claim 8, including the step of cross-linking the polymeric material.
Claim 11
Dependent Claim
19 words
A method according to claim 9, wherein the cross-linking is effected before the alteration of the protective material structure.
Claim 12
Independent Claim
16 words
A method according to any of the preceding claims, wherein the protective material comprises organic material.
Claim 13
Independent Claim
23 words
A method according to any of the preceding claims, wherein the protective material structure is altered as aforesaid independently of any fluid contact.
Claim 14
Independent Claim
18 words
A method according to any of the preceding claims, wherein the structure is altered as aforesaid by heating.
Claim 15
Dependent Claim
23 words
A method according to claim 13, wherein the protective material comprises heat-shrinkable material which is shrunk by the heating to alter the structure.
Claim 16
Independent Claim
21 words
A method according to any of the preceding claims, wherein the structure is altered as aforesaid by stretching the protective material.
Claim 17
Independent Claim
30 words
A method according to any of the preceding claims, wherein the structure is altered as aforesaid by exposing the protective material to radiation, particle bombardment, or an electric field. r
Claim 18
Independent Claim
18 words
A method according to any of the preceding claims, wherein the structure is altered as aforesaid by perforation.
Claim 19
Dependent Claim
23 words
A method according to claim 17, wherein the perforation is effected by exposing the protective material to penetration by radiation or particle bombardment.
Claim 20
Dependent Claim
14 words
A method according to claim 17, wherein the perforation is effected by mechanical punching.
Claim 21
Dependent Claim
29 words
A method according to any of the preceding claims except claim 12, wherein the protective material structure is altered as aforesaid by contacting the protective material with a fluid.
Claim 22
Dependent Claim
25 words
A method according to claim 20, wherein the protective material comprises material which is shrunk by the fluid contact to alter the structure as aforesaid.
Claim 23
Dependent Claim
33 words
A method according to claim 20 or 21, wherein the protective material structure is altered as aforesaid by contact with a fluid component of an electrical device in which the article is incorporated.
Claim 24
Independent Claim
40 words
A method according to any of the preceding claims, wherein the article incorporates at least one additional material capable of functioning in the intended end use of the article in addition to the sensitive material and the protective material. v
Claim 25
Independent Claim
25 words
A method according to any of the preceding claims, including the step of deforming the body of sensitive material while protected by the protective material.
Claim 26
Dependent Claim
27 words
A method according to claim 24, wherein the body is deformed while protected by the protective material so as to reduce the thickness of the sensitive material.
Claim 27
Dependent Claim
30 words
A method according to claim 24 or 25, wherein the body is deformed while protected by the protective material so as to change the surface configuration of the sensitive material.
Claim 28
Independent Claim
31 words
A method according to any of the preceding claims, wherein the protective material has been deformed in a way which facilitates subsequent alteration of its structure to render it relatively fluid-permeable.
Claim 29
Independent Claim
24 words
A method according to any of the preceding claims, wherein the sensitive material is capable of functioning as a component of an electrical device.
Claim 30
Dependent Claim
21 words
A method according to claim 27, wherein the sensitive material is capable of functioning as an electrode in the electrical device.
Claim 31
Dependent Claim
28 words
A method according to claim 28 or 29, wherein the protective material when rendered relatively fluid-permeable is capable of acting as an electrode , separator in the device.
Claim 32
Dependent Claim
39 words
A method according to claim 28, 29 or 30, wherein the article incorporates at least one additional material capable of functioning as another component of the said electrical device in addition to the sensitive material and the protective material.
Claim 33
Dependent Claim
18 words
A method according to claim 31, wherein the additional material is capable of functioning as a current collector.
Claim 34
Independent Claim
19 words
A method according to any of the preceding claims, wherein the sensitive material comprises a metal or metal alloy.
Claim 35
Dependent Claim
19 words
A method according to claim 33, wherein the sensitive material comprises an alkali metal or an alkaline earth metal.
Claim 36
Independent Claim
20 words
A method according to any of claims 1 to 32, wherein the sensitive material comprises an electrically conductive polymer composition.
Claim 37
Independent Claim
23 words
A method according to any of the precedinq claims, wherein the sensitive material is in the form of a thin strip or sheet.
Claim 38
Independent Claim
31 words
A method of making an electrical device, comprising (x) making an article by a method according to any of the preceding claims and (y) incorporating the article in the electrical device.
Claim 39
Dependent Claim
15 words
. 38. A method according to claim 37, wherein the sensitive material is electrically conductive.
Claim 40
Dependent Claim
19 words
A method according to claim 38, including the step of forming the article into an electrode for the device.
Claim 41
Dependent Claim
31 words
A method according to claim 39, including the step of coiling the said article in the form of a sheet or strip so as to provide a coiled electrical cell electrode.
Claim 42
Independent Claim
28 words
A method according to any of claims 37 to 40, wherein the alteration of the protective material structure is effected before the article is incorporated in the device.
Claim 43
Independent Claim
28 words
A method according to any of claims 37 to 40, wherein the alteration of the protective material structure is effected after the article is incorporated in the device.
Claim 44
Independent Claim
31 words
A method according to any of claims 37 to 40, wherein the said article is fed to apparatus which assembles portions of the article into a plurality of the electrical devices.
Claim 45
Dependent Claim
31 words
A method according to claim 43, wherein the apparatus receives a substantially continuous feed of the said article and automatically assembles successive portions thereof into a succession of the electrical devices.
Claim 46
Dependent Claim
33 words
A method according to claim 43 or 44 wherein the alteration to render the protective material relatively fluid-permeable is effected during the feeding of the said article to or within the said apparatus.
Claim 47
Dependent Claim
18 words
A method according to claim 1, substantially as described with reference to the foregoing Examples 2 or 3.
Claim 48
Dependent Claim
18 words
A method according to claim 37, substantially as described with reference to the foregoing Examples 2 or 3.
Claim 49
Dependent Claim
19 words
Electrical cell production equipment capable of producing electrical cells by a method accordinq to claim 44, 44, or 45.
Claim 50
Dependent Claim
21 words
Equipment according to claim 48 substantially as hereinbefore described with reference to Fig. 2 or Fig. 3 of the accompanying drawings.
Claim 51
Dependent Claim
16 words
An article made by a method according to any of claims 1 to 36 and 46.
Claim 52
Dependent Claim
16 words
An electrical device made by a method according to any of claims 37 to 45'and 47.
References Cited (Backward Citations)
No citation records indexed.
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