US4200686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy density thermal cell
Assignee: United States Department of the Navy
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Filing: 1979-02-05
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Granted: 1980-04-29
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Expires: 1999-02-05
Abstract
Abstract A thermal battery using a calcium anode and a catholyte consisting of a mure of lithium, potassium, nitrate and chloride ions. The device is operable over a temperature range of about 150° C. to 600° C. and produces a long lasting, high energy density output.
Inventors
- 👤 Aaron N. Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M6/00; H01M6/30; H01M6/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
55 words
A thermal battery, comprising: an electrolyte consisting of potassium, lithium, nitrate and chloride ions; a calcium anode immersed in said electrolyte; a cathode immersed in said electrolyte; a separator immersed in said electrolyte between said calcium anode and said cathode; and a heat source in thermal contact with said electrolyte for supplying thermal energy thereto.
Claim 2
Dependent Claim
55 words
A thermal battery, comprising: an electrolyte consisting of potassium, lithium, nitrate and chloride ions; a calcium anode immersed in said electrolyte; a cathode immersed in said electrolyte; a separator immersed in said electrolyte between said calcium anode and said cathode; and a heat source in thermal contact with said electrolyte for supplying thermal energy thereto.
Claim 3
Dependent Claim
48 words
A thermal battery according to claim 1 wherein the anions of said electrolyte consist of 10 to 20 mole percent chloride with the remainder being nitrate ions and wherein the cations of said electrolyte consist of 50 to 75 mole percent lithium with the remainder being potassium ions.
References Cited (Backward Citations)
US3055960A
Cited
US4086396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |