EP0602976A1
Expired / Lapsed
EP
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Rectangular cell and its fabrication method
Assignee: Canon Inc
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Filing: 1993-12-16
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Granted: —
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Expires: 2013-12-16
Abstract
Abstract An object of the present invention is to provide a rectangular or sheet-like cell being capable of supplying the flow of a large current, and having a large energy density per volume, at least comprising a negative electrode active material, a separator, a positive electrode active material, an electrolyte, and a collector, characterized in that positive electrodes made of positive electrode active material and negative electrodes made of negative electrode active material are formed in a plurality of regions separated from each other at least on a foldable insulating member, and the cell is housed by folding up in a resin having no active material. According to the present invention, a rectangular cell can be fabricated which can attain an energy density equivalent to that of spirally wound cylindrical cell, and supply the flow of a large current, with the dead space of cell storage space reduced to the utmost. Further, since the integration can be effected even with a single cell, a sheet-type or rectangular cell having a higher cell voltage can be made. Also, the manufacturing process of cells can be simplified.
Inventors
- 👤 Soichiro C/O Canon Kabushiki Kaisha Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:51
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/04; H01M10/0413; H01M10/0431; H01M10/0436; H01M10/045; H01M10/0454; H01M6/00; H01M6/40; H01M10/24; H01M10/30; H01M10/34; H01M10/345; H01M50/00; H01M50/10; H01M50/102; H01M50/103; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
64 words
A rectangular or sheet-like cell, at least comprised of a negative electrode active material, a separator, a positive electrode active material, an electrolyte, and a collector, characterized in that: there are a plurality of regions at least on an insulating member where positive electrodes made of positive electrode active material or negative electrodes made of negative electrode active material are separated from each other.
Claim 2
Dependent Claim
26 words
A cell according to claim 1, characterized in that said insulating member has a bent portion at least partly in a region having no active material.
Claim 3
Dependent Claim
16 words
A cell according to claim 2, characterized in that said insulating member is like a screen.
Claim 4
Dependent Claim
47 words
A cell according to claim 1, characterized in that said positive electrodes made of positive electrode active material and said negative electrodes made of negative electrode active material separated from each other in said plurality of regions are provided within the same plane of said insulating member.
Claim 5
Dependent Claim
48 words
A cell according to claim 4, characterized in that said positive electrodes made of positive electrode active material and said negative electrodes made of negative electrode active material separated from each other in said plurality of regions are alternately provided within the same plane of the insulating member.
Claim 6
Dependent Claim
51 words
A cell according to claim 1, characterized in that the same electrodes of said positive electrodes made of positive electrode active material or said negative electrodes made of negative electrode active material separated from each other in said plurality of regions are provided within the same plane of the insulating member.
Claim 7
Dependent Claim
34 words
A cell according to claim 1, characterized in that said positive electrodes made of positive electrode active material and said negative electrodes made of negative electrode active material are opposed via said insulating member.
Claim 8
Dependent Claim
24 words
A cell according to claim 1, characterized in that said collector is continuously provided in a smaller area than that of said insulating member.
Claim 9
Dependent Claim
47 words
A cell according to claim 1, characterized in that said collector is provided discontinuously and regularly in a plurality of regions separated from each other at least on one side of said insulating member, so that the serialization of unit cells is effected within the cell case.
Claim 10
Dependent Claim
19 words
A cell according to claim 1, characterized in that said collectors are opposed with the insulating member interposed therebetween.
Claim 11
Dependent Claim
21 words
A cell according to claim 1, characterized in that said collectors are provided between said insulating member and said active material.
Claim 12
Dependent Claim
24 words
A cell according to claim 1, characterized in that said collectors are provided in or on the active material provided on said insulating member.
Claim 13
Dependent Claim
21 words
A cell according to claim 1, characterized in that said insulating member has fine pores having a role of the separator.
Claim 14
Dependent Claim
19 words
A cell according to claim 1, characterized in that said insulating member is constituted of two or more sheets.
Claim 15
Dependent Claim
31 words
A cell according to claim 1, characterized in that said positive electrodes or negative electrodes are formed by applying a substance mainly composed of an active material to said insulating member.
Claim 16
Dependent Claim
25 words
A cell according to claim 1, characterized in that at least part of said bent portion is thinner than other portions of the insulating member.
Claim 17
Dependent Claim
21 words
A cell according to claim 1, characterized by comprising the cut line at least in a part of said bent portion.
Claim 18
Dependent Claim
41 words
A cell fabrication method wherein positive electrodes made of positive electrode active material and negative electrodes made of negative electrode active material are formed in a plurality of regions separated from each other on an insulating member to fabricate a cell.
Claim 19
Dependent Claim
79 words
A cell fabrication method according to claim 18, wherein positive electrodes made of positive electrode active material and negative electrodes made of negative electrode active material are formed in a plurality of regions separated from each other on the same plane of said insulating member, and said insulating member is folded in a region having none of said positive electrode active material and said negative electrode active material, so that said positive electrodes and said negative electrodes are opposed.
Claim 20
Dependent Claim
38 words
A cell comprising discrete areas of positive and negative electrode materials carried on one or more substrates having flexible regions enabling folding of the substrate to form one or more pairs of opposing positive and negative electrode areas.
Claim 21
Independent Claim
45 words
A method of forming a cell comprising the steps of: forming discrete areas of positive and negative electrode materials on one or more substrates having flexible regions; and folding to the substrate to form one or more pairs of opposing positive and negative electrode areas.
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