Patent US4628593A successfully refreshed from Google Patents.
US4628593A
Expired / Lapsed
US
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Method for fabricating battery plaque and low shear nickel electrode
Assignee: United States Department of the Air Force
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Filing: 1985-08-23
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Granted: 1986-12-16
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Expires: 2005-08-23
Abstract
Abstract A low shear battery plaque and a nickel electrode fabricated therefrom, the latter consisting essentially of a centrally located layer of a conductive felt, layers of sintered nickel on each side of the felt and nickel hydroxide active material disposed throughout the pores of the sintered nickel.
Inventors
- 👤 David H. Fritts
- 👤 John F. Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:38
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/80; H01M4/24; H01M4/32; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
A method for fabricating a battery plaque which comprises the steps of: (a) providing a sheet of electrically conductive felt; (b) rolling said felt sheet to a desired thickness to provide a rolled sheet; (c) applying a metal powder slurry to both sides of said rolled sheet; and (d) sintering said metal powder in a reducing atmosphere, whereby the resulting sintered metal powder layers do not connect through the resulting rolled felt sheet layer and whereby there is substantially no attachment of the metal powder particles in said sintered layers to the strands in said felt layer, thereby allowing a degree of slippage between said felt layer and said sintered layers.
Claim 2
Independent Claim
111 words
A method for fabricating a battery plaque which comprises the steps of: (a) providing a sheet of electrically conductive felt; (b) rolling said felt sheet to a desired thickness to provide a rolled sheet; (c) applying a metal powder slurry to both sides of said rolled sheet; and (d) sintering said metal powder in a reducing atmosphere, whereby the resulting sintered metal powder layers do not connect through the resulting rolled felt sheet layer and whereby there is substantially no attachment of the metal powder particles in said sintered layers to the strands in said felt layer, thereby allowing a degree of slippage between said felt layer and said sintered layers.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said conductive felt is a felt metal.
Claim 4
Dependent Claim
24 words
The method of claim 2 additionally comprising the step of etching said rolled sheet in a weak acid solution prior to applying said slurry.
Claim 5
Dependent Claim
11 words
The method of claim 2 wherein said felt metal is nichrome.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said conductive felt is carbon fiber felt.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein said felt sheet is rolled to a thickness in the approximate range of 0.10 to 0.30 mm.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein said felt sheet is rolled to a thickness in the approximate range of 0.20 to 0.30 mm.
Claim 9
Independent Claim
135 words
A method for fabricating a nickel electrode which comprises the steps of: (a) providing a sheet of electrically conductive felt; (b) rolling said felt sheet to a desired thickness to provide a rolled sheet; (c) applying a metal powder slurry to both sides of said coated sheet; and (d) sintering said metal powder in a reducing atmosphere, whereby the resulting sintered metal powder layers do not connect through the resulting rolled felt sheet layer and whereby there is substantially no attachment of the metal powder particles in said sintered layers to the strands in said felt layer, thereby allowing a degree of slippage between said felt layer and said sintered layers, thereby providing a plaque; (e) impregnating said plaque with nickel nitrate; and (f) electrically converting the nickel nitrate in said plaque to nickel hydroxide.
Claim 10
Independent Claim
135 words
A method for fabricating a nickel electrode which comprises the steps of: (a) providing a sheet of electrically conductive felt; (b) rolling said felt sheet to a desired thickness to provide a rolled sheet; (c) applying a metal powder slurry to both sides of said coated sheet; and (d) sintering said metal powder in a reducing atmosphere, whereby the resulting sintered metal powder layers do not connect through the resulting rolled felt sheet layer and whereby there is substantially no attachment of the metal powder particles in said sintered layers to the strands in said felt layer, thereby allowing a degree of slippage between said felt layer and said sintered layers, thereby providing a plaque; (e) impregnating said plaque with nickel nitrate; and (f) electrically converting the nickel nitrate in said plaque to nickel hydroxide.
Claim 11
Dependent Claim
13 words
The method of claim 8 wherein said conductive felt is a felt metal.
Claim 12
Dependent Claim
11 words
The method of claim 9 wherein said felt metal is nichrome.
Claim 13
Dependent Claim
14 words
The method of claim 8 wherein said conductive felt is a carbon fiber felt.
Claim 14
Dependent Claim
24 words
The method of claim 9 additionally comprising the step of etching said rolled sheet in a weak acid solution prior to applying said slurry.
Claim 15
Dependent Claim
23 words
The method of claim 8 wherein said felt sheet is rolled to a thickness in the approximate range of 0.10 to 0.30 mm.
Claim 16
Dependent Claim
23 words
The method of claim 8 wherein said felt sheet is rolled to a thickness in the approximate range of 0.20 to 0.30 mm.
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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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |