US4636445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal/hydrogen alkaline storage battery
Assignee: Sanyo Electric Co Ltd
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Filing: 1986-03-17
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Granted: 1987-01-13
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Expires: 2006-03-17
Abstract
Abstract The present invention is directed to a metal/hydrogen alkaline storage battery, which comprises a positive electrode of a metal oxide, a negative electrode of a hydrogen-storage alloy, and a separator impregnated with an alkaline electrolyte and placed between the positive and negative electrodes. The electrodes and separator are housed within a sealed type battery casing. The casing has a device for maintaining the pressure in the battery in a selected range of from an equilibrium pressure required for absorbing hydrogen by the negative electrode to about 20 kg/cm 2 .
Inventors
- 👤 Masaru Yamano
- 👤 Takashi Sakai
- 👤 Nobuhiro Furukawa
- 👤 Shuzo Murakami
- 👤 Takanao Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/242; H01M10/00; H01M10/34; H01M10/345; H01M50/00; H01M50/10; H01M50/116; H01M50/117; H01M50/119; H01M50/124; H01M50/1243; H01M50/131; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A metal/hydrogen alkaline storage battery which comprises: a positive electrode comprising a metal oxide, a negative electrode comprising a hydrogen-storage alloy, a separator interposed between said positive electrode and said negative electrode and impregnated with an alkaline electrolyte, wherein said electrolyte is a 15 to 35 wt.% alkaline solution and the amount of said electrolyte is controlled to 0.50 to 2.10 ml per AH of the theoretical capacity of said negative electrode, and a battery casing for housing said positive and negative electrodes and said separator, wherein said battery casing comprises valve means having a valve which acts under pressure ranging from an equilibrium pressure in adsorption of hydrogen by said negative electrode to about 20 kg/cm 2 , thereby maintaining the internal pressure of the battery below about 20 kg/cm 2 .
Claim 2
Dependent Claim
133 words
A metal/hydrogen alkaline storage battery which comprises: a positive electrode comprising a metal oxide, a negative electrode comprising a hydrogen-storage alloy, a separator interposed between said positive electrode and said negative electrode and impregnated with an alkaline electrolyte, wherein said electrolyte is a 15 to 35 wt.% alkaline solution and the amount of said electrolyte is controlled to 0.50 to 2.10 ml per AH of the theoretical capacity of said negative electrode, and a battery casing for housing said positive and negative electrodes and said separator, wherein said battery casing comprises valve means having a valve which acts under pressure ranging from an equilibrium pressure in adsorption of hydrogen by said negative electrode to about 20 kg/cm 2 , thereby maintaining the internal pressure of the battery below about 20 kg/cm 2 .
Claim 3
Dependent Claim
40 words
A storage battery according to claim 1, wherein said hydrogen-storage alloy is selected from those which are capable of absorbing hydrogen under a pressure of about 20 kg/cm 2 or less at a temperature of up to about 70° C.
Claim 4
Dependent Claim
25 words
A storage battery according to claim 1, wherein said negative electrode comprises a hydrogen-storage alloy retained by an alkali-resistant synthetic resin binder and a thickener.
Claim 5
Dependent Claim
22 words
A storage battery according to claim 3, wherein said alkali-resistant synthetic resin binder is an unsintered fluororesin constituting a fibrous binding reticulation.
Claim 6
Dependent Claim
13 words
A storage battery according to claim 4, wherein said thickener is polyethylene oxide.
Claim 7
Dependent Claim
42 words
A storage battery according to claim 1, wherein said positive and negative electrodes are rolled up with the separator interposed between them to form an electrode body and the roll-constituting pressure of the electrode body is 1.0 to 5.0 kg/cm 2 .
Claim 8
Dependent Claim
20 words
A storage battery according to claim 1, wherein said electrolyte is a 15 to 35 wt.% aqueous potassium hydroxide solution.
Claim 9
Dependent Claim
54 words
A storage battery according to claim 1, wherein said positive and negative electrodes and said separator constitute an electrode body having said negative electrode as an outer wall of said electrode body, said battery casing is made of a metal, and the inner surface of said casing is in contact with said negative electrode.
Claim 10
Dependent Claim
58 words
A storage battery according to claim 1, wherein said positive and negative electrodes and said separator constitute an electrode body having said negative electrode as an outer wall of said electrode body, said battery casing is made of a metal, and a greasy heat-conductive substance is disposed between the inner surface of said casing and said negative electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |