US4572879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-acid cell and method of producing same
Assignee: Sanyo Electric Co Ltd
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Filing: 1982-07-21
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Granted: 1986-02-25
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Expires: 2002-07-21
Abstract
Abstract A lead-acid cell wherein current collectors (1, 5) constituting negative and positive plates opposed to each other with a separator (3) interposed therebetween which separator retains an electrolyte. One surface of each flat plate-like current collector (1, 5) has closely contacted therewith an active material layer (2, 4) having a net-like body embedded therein, and the current collector constituted of the active material layer (2, 4) and the current collector (1, 5) is disposed so that its side where the corresponding active material layer (2, 4) is formed is opposed to the separator (3).
Inventors
- 👤 Yuji Morioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:43
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/12; H01M10/125; H01M4/00; H01M4/02; H01M4/14; H01M4/64; H01M4/70; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A lead acid cell, which comprises: a negative electrode; a positive electrode; and a separator interposed between the negative and positive electrodes, the separator being adapted to retain an electrolyte, the positive electrode including an active material layer, a net-like body of resin embedded in the active material layer, a current collector having a solid, plate-like structure, and an electrolyte-resistant band-like insulation layer, the solid current collector being placed in close contact with a surface of the active material layer, the solid current collector being formed of lead or lead alloy, the current collector including a terminal take-out portion, the insulation layer being interposed partly between the current collector and the active material layer and extending toward the terminal take-out portion.
Claim 2
Dependent Claim
121 words
A lead acid cell, which comprises: a negative electrode; a positive electrode; and a separator interposed between the negative and positive electrodes, the separator being adapted to retain an electrolyte, the positive electrode including an active material layer, a net-like body of resin embedded in the active material layer, a current collector having a solid, plate-like structure, and an electrolyte-resistant band-like insulation layer, the solid current collector being placed in close contact with a surface of the active material layer, the solid current collector being formed of lead or lead alloy, the current collector including a terminal take-out portion, the insulation layer being interposed partly between the current collector and the active material layer and extending toward the terminal take-out portion.
Claim 3
Dependent Claim
24 words
A lead-acid cell as set forth in claim 1, wherein said net-like body is positioned so that it does not contact said current collector.
Claim 4
Dependent Claim
28 words
A lead-acid cell as set forth in claim 1, wherein said separator and said negative and positive electrodes are circinately wound in closely contacted relation to each other.
Claim 5
Dependent Claim
19 words
A lead-acid cell as set forth in claim 3, including an insulator interposed between said negative and positive electrodes.
References Cited (Backward Citations)
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US4439916A
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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) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |