Patent US4335191A successfully refreshed from Google Patents.
US4335191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium cells
Assignee: Tadiran Batteries Ltd
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Filing: 1980-07-28
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Granted: 1982-06-15
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Expires: 2000-07-28
Abstract
Abstract The present invention relates to lithium cells of the wound electrode high power type, with reduced short-circuit current, wherein the short-circuit current is reduced by the use of an electrolyte of reduced concentration or activity, or by the use of an electrode of lithium alloyed with magnesium, calcium, aluminum, cadmium or silicon.
Inventors
- 👤 Emanuel Peled
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:14
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
In a lithium cell of the wound-electrode high power type comprising an oxidizable lithium anode, a current collector, an electrolyte comprising a solute selected from the group consisting of LiAlCl 4 , LiBCl 4 and mixtures thereof dissolved in an oxyhalide solvent, the improvement which comprises employing a concentration of the solute in the electrolyte of between about 0.1 M to 0.6 M, whereby the short-circuit current is reduced, thereby rendering the cell resistant to explosion upon short-circuiting.
Claim 2
Dependent Claim
78 words
In a lithium cell of the wound-electrode high power type comprising an oxidizable lithium anode, a current collector, an electrolyte comprising a solute selected from the group consisting of LiAlCl 4 , LiBCl 4 and mixtures thereof dissolved in an oxyhalide solvent, the improvement which comprises employing a concentration of the solute in the electrolyte of between about 0.1 M to 0.6 M, whereby the short-circuit current is reduced, thereby rendering the cell resistant to explosion upon short-circuiting.
Claim 3
Dependent Claim
108 words
In a lithium cell of the wound-electrode high power type comprising an oxidizable lithium anode, a current collector, an electrolyte comprising a solute selected from the group consisting of LiAlCl 4 , LiBCl 4 and mixtures thereof dissolved in an oxyhalide solvent, the improvement which comprises employing a concentration of the solute in the electrolyte of between about 0.1 M to 0.6 M, and employing a lithium alloy anode comprising from about 1 to 15 atom % of an alloying element selected from the group consisting of magnesium, calcium, aluminum, cadmium and silicon, whereby the short-circuit current is reduced, thereby rendering the cell resistant to explosion upon short-circuiting.
Claim 4
Dependent Claim
108 words
In a lithium cell of the wound-electrode high power type comprising an oxidizable lithium anode, a current collector, an electrolyte comprising a solute selected from the group consisting of LiAlCl 4 , LiBCl 4 and mixtures thereof dissolved in an oxyhalide solvent, the improvement which comprises employing a concentration of the solute in the electrolyte of between about 0.1 M to 0.6 M, and employing a lithium alloy anode comprising from about 1 to 15 atom % of an alloying element selected from the group consisting of magnesium, calcium, aluminum, cadmium and silicon, whereby the short-circuit current is reduced, thereby rendering the cell resistant to explosion upon short-circuiting.
Claim 5
Dependent Claim
23 words
A lithium cell according to claims 1 or 2, wherein the electrolyte comprises in combination LiAlCl 4 and NaAlCl 4 in thionyl chloride.
Claim 6
Dependent Claim
25 words
A lithium cell according to claims 1 or 2 comprising as electrolyte 0.6 M LiAlCl 4 in thionyl chloride, and further comprises KAlCl 4 .
Claim 7
Dependent Claim
19 words
A lithium cell according to claims 1 or 2, wherein the alloy is a Li/Mg or a Li/Ca alloy.
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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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |