US4317872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead acid battery with gel electrolyte
Assignee: GNB Inc
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Filing: 1980-04-25
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Granted: 1982-03-02
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Expires: 2000-04-25
Abstract
Abstract This invention is directed to a lead-acid battery utilizing a novel electrolyte which includes a silica component. The silica component includes silica particles, means for repelling the particles from each other and for catalyzing the formation of siloxane cross-linkages and a sulfuric acid component. The lead-acid battery includes a container, a plurality of electrodes substantially enclosed by the container, and an electrolyte in substantial physical contact with the plurality of electrodes. A novel separator material having a silicate component for use in a lead-acid battery is also included in this invention. The separator material includes a silicate component integrally mixed with an oxygen compound of boron forming a microfiber mat. The mat has a pore size between about 0.5 to 10 microns in diameter and an electrical resistance of about 0.01 ohms per square inch for a 0.05 inch thickness.
Inventors
- 👤 Brajendra P. Varma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:35
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/08; H01M10/10; H01M50/00; H01M50/40; H01M50/489; H01M50/491; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
108 words
A lead-acid battery comprising a container; a plurality of alternating positive and negative electrodes disposed in said container; separator means disposed between said electrodes and comprising a silicate component integrally mixed with an oxygen compound of boron to form a microfiber glass mat; and a gel electrolyte in substantial physical contact with said positive and negative electrodes and separators in each cell, said electrolyte comprising a sulfuric acid component and a silica component derived from an aqueous colloidal dispersion of silica particles with means causing a negative electric charge on the surface thereof to cause said particles to repel each other and catalyze the formation of siloxane cross-linkages.
Claim 2
Dependent Claim
108 words
A lead-acid battery comprising a container; a plurality of alternating positive and negative electrodes disposed in said container; separator means disposed between said electrodes and comprising a silicate component integrally mixed with an oxygen compound of boron to form a microfiber glass mat; and a gel electrolyte in substantial physical contact with said positive and negative electrodes and separators in each cell, said electrolyte comprising a sulfuric acid component and a silica component derived from an aqueous colloidal dispersion of silica particles with means causing a negative electric charge on the surface thereof to cause said particles to repel each other and catalyze the formation of siloxane cross-linkages.
Claim 3
Dependent Claim
24 words
A lead-acid battery as recited in claim 1, wherein said separator means has a pore size between about 0.5 to 10 microns in diameter.
Claim 4
Dependent Claim
28 words
A lead-acid battery as recited in claim 1, wherein said silicate component of said separator means comprises more than 40 percent of the weight of the separator material.
Claim 5
Dependent Claim
28 words
A lead-acid battery as recited in claim 1, wherein said oxygen compound of boron comprises about 0.5 percent to 15 percent of the weight of the separator material.
Claim 6
Dependent Claim
27 words
A lead-acid battery as recited in claim 1, wherein said oxygen compound of boron is selected from the group comprising boron oxide, boric acid and mixtures thereof.
Claim 7
Dependent Claim
28 words
A lead-acid battery as recited in claim 1, wherein said separator means has an electrical resistance of about 0.001 ohms per square inch for a 0.05 inch thickness.
Claim 8
Dependent Claim
40 words
A lead-acid battery as recited in claim 1, wherein said gel electrolyte has a sulfuric acid component in an amount between about 30 percent to 50 percent of the electrolyte weight, calculated using 1.400 specific gravity acid prior to mixing.
Claim 9
Dependent Claim
26 words
A lead-acid battery as recited in claim 1, wherein the silica component of said gel electrolyte is less than about 30 percent of the electrolyte weight.
Claim 10
Dependent Claim
28 words
A lead-acid battery as recited in claim 1, wherein the silica component of said gel electrolyte is between about 1 percent to 7 percent of the electrolyte weight.
Claim 11
Dependent Claim
24 words
A lead-acid battery as recited in claim 1, wherein said sulfuric acid component is about 43 percent to 48 percent of the electrolyte weight.
Claim 12
Dependent Claim
31 words
A lead-acid battery as recited in claim 1, wherein said sulfuric acid component in the gel electrolyte has a specific gravity of about 1.200 to 1.390 after mixing of the electrolyte.
Claim 13
Dependent Claim
30 words
A lead-acid battery as recited in claim 1, wherein said silicate component of said separator means comprises about 55 percent to 65 percent of the weight of the separator material.
Claim 14
Dependent Claim
21 words
A lead-acid battery as recited in claim 1, wherein said separator means has a thickness of about 0.01 to 0.1 inch.
Claim 15
Dependent Claim
100 words
A lead-acid battery comprising: a. a container; b. a plurality of alternating positive and negative electrodes disposed in said container; c. electrode spacers disposed between said plurality of positive and negative electrodes; and d. a gel electrolyte disposed between and in substantial physical contact with said plurality of electrodes in each cell, said electrolyte comprising a sulfuric acid component and a silica component derived from an aqueous colloidal dispersion of silica particles with means causing a negative electric charge on the surface of said particles to cause said particles to repel each other and catalyze the formation of siloxane cross-linkages.
Claim 16
Dependent Claim
100 words
A lead-acid battery comprising: a. a container; b. a plurality of alternating positive and negative electrodes disposed in said container; c. electrode spacers disposed between said plurality of positive and negative electrodes; and d. a gel electrolyte disposed between and in substantial physical contact with said plurality of electrodes in each cell, said electrolyte comprising a sulfuric acid component and a silica component derived from an aqueous colloidal dispersion of silica particles with means causing a negative electric charge on the surface of said particles to cause said particles to repel each other and catalyze the formation of siloxane cross-linkages.
Claim 17
Dependent Claim
40 words
A lead-acid battery as recited in claim 14, wherein said gel electrolyte has a sulfuric acid component in an amount between about 30 percent to 50 percent of the electrolyte weight, calculated using 1.400 specific gravity acid prior to mixing.
Claim 18
Dependent Claim
26 words
A lead-acid battery as recited in claim 14, wherein the silica component of said gel electrolyte is less than about 30 percent of the electrolyte weight.
Claim 19
Dependent Claim
28 words
A lead-acid battery as recited in claim 14, wherein the silica component of said gel electrolyte is between about 1 percent to 7 percent of the electrolyte weight.
Claim 20
Dependent Claim
24 words
A lead-acid battery as recited in claim 14, wherein said sulfuric acid component is about 43 percent to 48 percent of the electrolyte weight.
Claim 21
Dependent Claim
27 words
A lead-acid battery as recited in claim 14, wherein said sulfuric acid component has a specific gravity of about 1.200 to 1.390 after mixing of the electrolyte.
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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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |