Patent US3864170A successfully refreshed from Google Patents.
US3864170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low conductivity thermal insulator for thermal batteries
Assignee: United States Department of the Army
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Filing: 1974-04-18
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Granted: 1975-02-04
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Expires: 1994-04-18
Abstract
Abstract A low thermal conductivity insulator for thermal power supplies comprising: (a) a thermal battery having components that react when heated and thereby produce electricity; (b) a porous thermal insulator surrounding the thermal battery in order to reduce heat losses therefrom; and (c) a gas having a thermal conductivity less than air and located in the pores of the insulator, and inert with respect to the components of the battery.
Inventors
- 👤 Frank C Krieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:08
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/36; H01M10/00; H01M10/60; H01M10/61; H01M10/615; H01M10/65; H01M10/658; H01M10/64; H01M10/647; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A LOW THERMAL CONDUCTIVE INSULATOR FOR THERMAL POWER SUPPLIES, COMPRISING, IN COMBINATION: A. A THERMAL BATTERY HAVING ELECTRODES AND AT LEAST ONE SOLID ELECTRICALLY NON-CONDUCTING MATERIAL AT NORMAL STORAGE TEMPERATURE BUT BECOMING AN ELECTROLYTE IN THE MOLTEN STATE AND MEANS CONTAINED IN THE BATTERY FOR SUPPLYING HEAT TO MELT SAID ELECTROLYTE CAUSING SAID CELL TO BECOME FUNCTIONALLY ACTIVE TO PRODUCE ELECTRIC CURRENT, SAID MEANS ALSO CAUSING HIGH THERMALLY CONDUCTIVE GASES TO BE EVOLVED AND CAPABLE OF REDUCING THE EFFICIENCY OF A POROUS THERMAL INSULATOR SAID BATTERY BEING IN A GAS TIGHT METAL CONTAINER;
Claim 2
Dependent Claim
93 words
A LOW THERMAL CONDUCTIVE INSULATOR FOR THERMAL POWER SUPPLIES, COMPRISING, IN COMBINATION: A. A THERMAL BATTERY HAVING ELECTRODES AND AT LEAST ONE SOLID ELECTRICALLY NON-CONDUCTING MATERIAL AT NORMAL STORAGE TEMPERATURE BUT BECOMING AN ELECTROLYTE IN THE MOLTEN STATE AND MEANS CONTAINED IN THE BATTERY FOR SUPPLYING HEAT TO MELT SAID ELECTROLYTE CAUSING SAID CELL TO BECOME FUNCTIONALLY ACTIVE TO PRODUCE ELECTRIC CURRENT, SAID MEANS ALSO CAUSING HIGH THERMALLY CONDUCTIVE GASES TO BE EVOLVED AND CAPABLE OF REDUCING THE EFFICIENCY OF A POROUS THERMAL INSULATOR SAID BATTERY BEING IN A GAS TIGHT METAL CONTAINER;
Claim 3
Dependent Claim
19 words
The thermal cell of claim 1 wherein said gas is argon, krypton, xenon, CF4, or CF3-CF3 or mixtures thereof.
Claim 4
Dependent Claim
22 words
The thermal cell of claim 2 further comprising a gas tight metal container that separates said thermal battery and said thermal insulator.
Claim 5
Dependent Claim
16 words
The thermal cell of claim 3 wherein said thermal insulator is asbestos paper or fiberglass wool.
Claim 6
Dependent Claim
26 words
The thermal cell of claim 3 further comprising an effective amount of an oxidizing agent located in said thermal insulator for the removal of hydrogen gas.
Claim 7
Dependent Claim
17 words
The thermal cell of claim 5 wherein said oxidizing agent is CuO, FeO, Ag2O, SnO2 or SnO.
Claim 8
Dependent Claim
15 words
The thermal cell of claim 5 further comprising a desiccant located in said thermal insulator.
Claim 9
Dependent Claim
23 words
The thermal cell of claim 7 wherein said desiccant is Mg(ClO4)2, CaSO4, Ba(ClO4)2, LiCl, CaO, BaO, CaCl2, silica gel or activated aluminum oxide.
Claim 10
Dependent Claim
33 words
The thermal cell of claim 3 further comprising a gettering agent in an amount effective to remove contaminating gases from said insulator, said gettering agent being inert to said low thermal conductive gas.
Claim 11
Dependent Claim
25 words
The method of claim 10 further comprising the step of introducing an oxidizing agent and a desiccating agent into the pores of said thermal insulation.
Claim 12
Dependent Claim
18 words
The method of claim 9 wherein said low thermal conductivity gas is argon, krypton, xenon, CF4 or CF3-CF3.
Claim 13
Dependent Claim
55 words
The method of claim 10 further comprising the steps of: a. initially evacuating the porous thermal insulation during the assembly of said battery; and b. maintaining said vacuum during storage and operation by means of a gettering agent, said gettering agent removing gas contaminants entering during storage and upon heating the battery components of activation.
Claim 14
Dependent Claim
16 words
The method of claim 11 wherein said gettering agent is barium, misch metal, uranium or thorium.
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |