US3855006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy density battery heat fusible venting means
Assignee: EIDP Inc
•
Filing: 1973-08-01
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Granted: 1974-12-17
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Expires: 1993-08-01
Abstract
Abstract High energy density batteries can be protected against violent rupture due to overheating cause by either external or internally produced heat by incorporating in the battery case electrolyte expulsion vents sealed with heat fusible material which melts at a temperature below that necessary to produce extreme internal pressure.
Inventors
- 👤 M Kegelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:05
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/375; H01M50/342; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
IN A GALVANIC BATTERY COMPRISING A LITHIUM ANODE, A DEPOLARZING CATHODE IN AN OXIDATION STATE HGIH IN RELATION LITHIUM AND AN ELECTROLYTE COMPRISING A CIMBUSTIBLE ORGANIC SOLVENT SND A SOLUTE ENCLOSED IN AN ATMOSPHERICALLY SEALED BATTERY CASE, THE IMPROVEMENT COMPRISING AT LEAST ONE ELECTROLYTE EXPULSION VENT INCORPORATED INTO THE SEALED BATTERY CASE HAVING A THERMALLY FUSIBLE METAL VENT PLUG THAT MELTS AT A PRESELECTED TEMPERATURE BELOW THE TEMPERATURE AT WHICH THE BATTERY CASE WOULD VIOLENTLY RUPTURE DUE TO HEAT AND PRESSURE, WHEREBY THE ELECTROLYTE IS VENTED FROM THE BATTERY CASE.
Claim 2
Dependent Claim
90 words
IN A GALVANIC BATTERY COMPRISING A LITHIUM ANODE, A DEPOLARZING CATHODE IN AN OXIDATION STATE HGIH IN RELATION LITHIUM AND AN ELECTROLYTE COMPRISING A CIMBUSTIBLE ORGANIC SOLVENT SND A SOLUTE ENCLOSED IN AN ATMOSPHERICALLY SEALED BATTERY CASE, THE IMPROVEMENT COMPRISING AT LEAST ONE ELECTROLYTE EXPULSION VENT INCORPORATED INTO THE SEALED BATTERY CASE HAVING A THERMALLY FUSIBLE METAL VENT PLUG THAT MELTS AT A PRESELECTED TEMPERATURE BELOW THE TEMPERATURE AT WHICH THE BATTERY CASE WOULD VIOLENTLY RUPTURE DUE TO HEAT AND PRESSURE, WHEREBY THE ELECTROLYTE IS VENTED FROM THE BATTERY CASE.
Claim 3
Dependent Claim
58 words
A battery of claim 1 in which the electrolyte solvent is a saturated aliphatic amine, a cyclic ether, a cyclic ester, acetonitrile, dimethylformamide, nitromethane or their mixtures and the solute is a salt of the formula MM''F6, MSCN, or MClO4 wherein M is a lithium, sodium or potassium cation and M'' is a phosphorus arsenic or antimony cation.
Claim 4
Dependent Claim
18 words
A battery of claim 1 in which the fusible material melts at from about 60* to about 100*C.
Claim 5
Dependent Claim
18 words
A battery of claim 1 in which the fusible material melts at from about 70* to about 95*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |