EP0336102A2
Expired / Lapsed
EP
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Secondary battery
Assignee: Hitachi Ltd
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Filing: 1989-02-27
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Granted: —
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Expires: 2009-02-27
Abstract
Abstract A secondary battery comprising, in a battery case (5), an electrode group (4) consisting of positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and a separator, an electrolytic solution, and a means (3) for decreasing the contact resistance between the substrates (2) of the positive and negative electrodes and the electrode active material (1) by pressing the electrode group.
Inventors
- 👤 Jinichi Imahashi
- 👤 Tatsuo Horiba
- 👤 Masato Takeuchi
- 👤 Tomoichi Kamo
- 👤 Shigeoki Nishimura
- 👤 Takao Ogura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 00:02
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/04; H01M10/0413; H01M10/0468; H01M10/24; H01M10/28; H01M10/42; H01M4/00; H01M4/02; H01M4/24; H01M4/62; H01M4/624; H01M4/626; H01M2004/026; H01M2004/027; H01M2004/028; H01M4/04; H01M4/0402; H01M4/0404; H01M4/043; H01M4/64; H01M4/70; H01M4/72; H01M4/74; H01M50/00; H01M50/10; H01M50/102; H01M50/103; H01M6/00; H01M6/04; H01M6/06; H01M6/10; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
70 words
A secondary battery comprising, in a battery case (25), an electrode group consisting of a separator (24) and positive and negative electrodes (23, 27) composed of an electrode substrate (2) and an electrode active material (1), an electrolytic solution, and a means (3) for decreasing the contact resistance between the substrates (2) of positive and negative electrodes (23, 27) and the electrode active material (1) by pressing the electrode group.
Claim 2
Dependent Claim
70 words
A secondary battery comprising, in a battery case (25), an electrode group consisting of a separator (24) and positive and negative electrodes (23, 27) composed of an electrode substrate (2) and an electrode active material (1), an electrolytic solution, and a means (3) for decreasing the contact resistance between the substrates (2) of positive and negative electrodes (23, 27) and the electrode active material (1) by pressing the electrode group.
Claim 3
Dependent Claim
16 words
A secondary battery according to Claim 1, wherein the pressing force is 1 to 100 kgf/cm².
Claim 4
Dependent Claim
46 words
A secondary battery according to Claim 1, wherein the pressing means (3) is a composite material composed of a water-absorbing polymer which is a substance changing its shape by a chemical or physical means and a synthetic resin, a shape-memory resin compound, or a shape-memory alloy.
Claim 5
Dependent Claim
25 words
A secondary battery according to Claim 1, wherein said positive electrode (23) and negative electrode (27) are a nickel electrode and a cadmium electrode, respectively.
Claim 6
Dependent Claim
42 words
A secondary battery according to Claim 4, wherein said nickel electrode (27) is formed by contact-bonding, to an electrode substrate (2), a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder.
Claim 7
Dependent Claim
64 words
A secondary battery according to Claim 4, wherein said positive and negative electrodes (23, 27) are prepared by attaching a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder to an electrode substrate (2) having a thickness of 0.4 to 0.05 mm, drying it and then contact-bonding it by means of a press.
Claim 8
Dependent Claim
64 words
A secondary battery according to Claim 4, wherein said positive and negative electrodes (23, 27) are prepared by attaching a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder onto an electrode substrate (2) having a thickness of 0.4 to 0.05 mm, drying it, and then contact-bonding it by means of a press.
Claim 9
Dependent Claim
96 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and having a shape of a spiral electrode (4) formed by winding the positive and negative electrodes and the separator, an electrolytic solution, and a means (3), placed in the inner circumferential part of the spiral electrode (4), for decreasing the contact resistance between the substrates (2) of positive and negative electrodes and the electrode active material (1) by pressing the electrode group (4).
Claim 10
Dependent Claim
96 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and having a shape of a spiral electrode (4) formed by winding the positive and negative electrodes and the separator, an electrolytic solution, and a means (3), placed in the inner circumferential part of the spiral electrode (4), for decreasing the contact resistance between the substrates (2) of positive and negative electrodes and the electrode active material (1) by pressing the electrode group (4).
Claim 11
Dependent Claim
33 words
A secondary battery according to Claim 8, wherein said pressing means (3) is a composite material consisting of a water-absorbing polymer and a synthetic resin, a shape-memory resin compound or a shape-memory alloy.
Claim 12
Dependent Claim
45 words
A secondary battery according to Claim 8, wherein said positive and negative electrodes are flexible electrodes prepared by contact-bonding a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder to an electrode substrate (2).
Claim 13
Dependent Claim
63 words
A secondary battery according to Claim 10, wherein said positive and negative electrodes are electrodes prepared by attaching a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder to an electrode substrate (2) having a thickness of 0.4 to 0.05 mm, drying it, and then contact-bonding it by means of a press.
Claim 14
Dependent Claim
100 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a base (2) and an electrode active material (1) and having a shape of a spiral electrode (4) prepared by winding the positive electrode, the negative electrode and the separator, an electrolytic solution, and a means (3, 9), placed in both inner and outer circumferential parts of the spiral electrode (4), for decreasing the contact resistance between the substrates (2) of positive and negative electrodes and the electrode active material (1) by pressing the electrode group (4).
Claim 15
Dependent Claim
100 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a base (2) and an electrode active material (1) and having a shape of a spiral electrode (4) prepared by winding the positive electrode, the negative electrode and the separator, an electrolytic solution, and a means (3, 9), placed in both inner and outer circumferential parts of the spiral electrode (4), for decreasing the contact resistance between the substrates (2) of positive and negative electrodes and the electrode active material (1) by pressing the electrode group (4).
Claim 16
Dependent Claim
26 words
A secondary battery according to Claim 12, wherein said pressing means (3, 9) is a composite material consisting of a water-absorbing polymer and a synthetic resin.
Claim 17
Dependent Claim
45 words
A secondary battery according to Claim 12, wherein said positive and negative electrodes are flexible electrodes prepared by contact-bonding a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder onto the electrode substrate (2).
Claim 18
Dependent Claim
62 words
A secondary battery according to Claim 14, wherein said positive and negative electrodes are electrodes prepared by attaching a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder to an electrode substrate (2) having a thickness of 0.4 to 0.05, drying it, and then contact-bonding it by means of a press.
Claim 19
Dependent Claim
97 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and having a shape of a spiral electrode (4) prepared by winding the positive electrode, the negative electrode and the separator, an electrolytic solution, and a means (9), placed in the outer circumferential part of the spiral electrode (4), for de creasing the contact resistance between the substrates (2) of positive and negative electrodes and the electrode active material (1) by pressing the electrode group.
Claim 20
Dependent Claim
97 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and having a shape of a spiral electrode (4) prepared by winding the positive electrode, the negative electrode and the separator, an electrolytic solution, and a means (9), placed in the outer circumferential part of the spiral electrode (4), for de creasing the contact resistance between the substrates (2) of positive and negative electrodes and the electrode active material (1) by pressing the electrode group.
Claim 21
Dependent Claim
25 words
A secondary battery according to Claim 16, wherein the pressing means (9) is a composite material consisting of a water-absorbing polymer and a synthetic resin.
Claim 22
Dependent Claim
45 words
A secondary battery according to Claim 16, wherein said positive and negative electrodes are flexible electrodes prepared by contact-bonding a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder onto an electrode substrate (2).
Claim 23
Dependent Claim
63 words
A secondary battery according to Claim 18, wherein said positive and negative electrodes are electrodes prepared by attaching a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder onto an electrode substrate (2) having a thickness of 0.4 to 0.05 mm, drying it, and then contact-bonding it by means of a press.
Claim 24
Dependent Claim
110 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and having a shape of spiral electrode (4) prepared by winding the positive and negative electrodes and the separator, an electrolytic solution, a means (9), placed in the outer circumferential part of the spiral electrode (4), and a wound core (11) placed in the central part of the spiral electrode (4) for decreasing the contact resistance between the substrates (2) of the positive and negative electrodes and the electrode active material (1) by pressing the electrode group (4).
Claim 25
Dependent Claim
110 words
A secondary battery comprising, in a battery case (5), an electrode group consisting of a separator and positive and negative electrodes composed of a substrate (2) and an electrode active material (1) and having a shape of spiral electrode (4) prepared by winding the positive and negative electrodes and the separator, an electrolytic solution, a means (9), placed in the outer circumferential part of the spiral electrode (4), and a wound core (11) placed in the central part of the spiral electrode (4) for decreasing the contact resistance between the substrates (2) of the positive and negative electrodes and the electrode active material (1) by pressing the electrode group (4).
Claim 26
Dependent Claim
25 words
A secondary battery according to Claim 20, wherein said pressing means (9) is a composite material consisting of a water-absorbing polymer and a synthetic resin.
Claim 27
Dependent Claim
45 words
A secondary battery according to Claim 20, wherein said positive and negative electrodes are flexible electrodes prepared by contact-bonding a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder onto the electrode substrate (2).
Claim 28
Dependent Claim
63 words
A secondary battery according to Claim 22, wherein said positive and negative electrodes are electrodes prepared by attaching a pasty kneaded mixture consisting of an electrode active material (1), a conducting material, an active material activator and a binder onto an electrode substrate (2) having a thickness of 0.4 to 0.05 mm, drying it, and then contact-bonding it by means of a press.
Claim 29
Dependent Claim
115 words
A secondary battery comprising, in a battery case (17), an electrode group consisting of a separator (20) and positive and negative electrodes (18, 19) composed of a substrate (2) and an electrode active material (1) and having a shape of a stacked electrode prepared by stacking a plurality of platy unit electrodes consisting of a positive electrode (18), a negative electrode (19) and a separator (20), an electrolytic solution, and a means (16), placed on the both terminals of the stacked electrodes (18, 19) for decreasing the contact resistance between the substrates (2) of the positive and negative electrodes (18, 19) and the electrode active material (1) by pressing the electrode group (18, 19, 20).
Claim 30
Dependent Claim
115 words
A secondary battery comprising, in a battery case (17), an electrode group consisting of a separator (20) and positive and negative electrodes (18, 19) composed of a substrate (2) and an electrode active material (1) and having a shape of a stacked electrode prepared by stacking a plurality of platy unit electrodes consisting of a positive electrode (18), a negative electrode (19) and a separator (20), an electrolytic solution, and a means (16), placed on the both terminals of the stacked electrodes (18, 19) for decreasing the contact resistance between the substrates (2) of the positive and negative electrodes (18, 19) and the electrode active material (1) by pressing the electrode group (18, 19, 20).
Claim 31
Dependent Claim
24 words
A secondary battery according to Claim 24, wherein said pressing means (16) is a composite material consisting of water-absorbing polymer and a synthetic resin.
References Cited (Backward Citations)
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