US4874680A
Expired / Lapsed
US
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Lithium secondary battery
Assignee: Panasonic Holdings Corp
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Filing: 1988-12-13
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Granted: 1989-10-17
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Expires: 2008-12-13
Abstract
Abstract A lithium secondary battery which comprises a positive electrode made of vanadium pentoxide as a principle component, a negative electrode made of lithium absorbing alloy, and an electrolyte prepared from an organic solvent dissolved with lithium salt. The lithium absorbing alloy is an alloy containing aluminum as a principle component, and the amount of lithium absorbed by the alloy is not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt % relative to the alloy containing the aluminum as the principal component.
Inventors
- 👤 Nobuharu Koshiba
- 👤 Toshihiko Ikehata
- 👤 Kenichi Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/131; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M4/134; H01M4/36; H01M4/38; H01M4/40; H01M4/46; H01M4/463; H01M4/48; H01M4/485; H01M4/64; H01M4/66; H01M4/669; H01M50/00; H01M50/10; H01M50/183; H01M50/19; H01M50/191; H01M10/0564; H01M10/0566; H01M10/0569; H01M10/42; H01M2010/4292; H01M2300/00; H01M2300/0017; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A lithium secondary battery which comprises: a positive electrode made of vanadium pentoxide as a principle component; a negative electrode made of lithium absorbing alloy; an electrolyte prepared from an organic solvent dissolved with lithium salt; and said lithium absorbing alloy being an alloy containing aluminum as a principle component, the amount of lithium absorbed by the alloy being not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt relative to the alloy containing the aluminum as the principal component.
Claim 2
Dependent Claim
90 words
A lithium secondary battery which comprises: a positive electrode made of vanadium pentoxide as a principle component; a negative electrode made of lithium absorbing alloy; an electrolyte prepared from an organic solvent dissolved with lithium salt; and said lithium absorbing alloy being an alloy containing aluminum as a principle component, the amount of lithium absorbed by the alloy being not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt relative to the alloy containing the aluminum as the principal component.
Claim 3
Dependent Claim
23 words
The battery as claimed in claim 1, wherein the amount of the lithium is within the range of 3 to 6 wt %.
Claim 4
Dependent Claim
21 words
The battery as claimed in claim 1, wherein the alloy containing the aluminum contains manganese in a quantity of about 2%.
Claim 5
Dependent Claim
26 words
The battery as claimed in claim 1, wherein the alloy containing the aluminum contains silver or indium in a quantity not greater than 1 wt %.
Claim 6
Dependent Claim
146 words
A lithium secondary battery which comprises: a positive electrode made of vanadium pentoxide as a principle component; a negative electrode made of lithium absorbing alloy, said lithium absorbing alloy being an alloy containing aluminum as a principal component; an electrolyte made of organic solvent dissolved with lithium salt; a corrosion-resistant battery casing including a sealing lid and a container for accommodating therein the positive and negative electrodes and the electrolyte; the amount of lithium in the lithium absorbing alloy being not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt % relative to the aluminum containing alloy when the battery is charged, said sealing lid being made of steel which contains chromium in a quantity of not smaller than 16 wt % and molybdenum in a quantity within the range of 1 to 3 wt %.
Claim 7
Dependent Claim
146 words
A lithium secondary battery which comprises: a positive electrode made of vanadium pentoxide as a principle component; a negative electrode made of lithium absorbing alloy, said lithium absorbing alloy being an alloy containing aluminum as a principal component; an electrolyte made of organic solvent dissolved with lithium salt; a corrosion-resistant battery casing including a sealing lid and a container for accommodating therein the positive and negative electrodes and the electrolyte; the amount of lithium in the lithium absorbing alloy being not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt % relative to the aluminum containing alloy when the battery is charged, said sealing lid being made of steel which contains chromium in a quantity of not smaller than 16 wt % and molybdenum in a quantity within the range of 1 to 3 wt %.
Claim 8
Dependent Claim
51 words
The battery as claimed in claim 5, further comprising a negative electrode collector welded to the sealing lid, said collector being made of steel which contains chromium in a quantity of not smaller than 16 wt % and molybdenum in a quantity within the range of 1 to 3 wt %.
Claim 9
Dependent Claim
110 words
A lithium secondary battery which comprises: a positive electrode made of vanadium pentoxide as a principle component; a negative electrode made of lithium absorbing alloy, said lithium absorbing alloy being an alloy containing aluminum as a principal component; an electrolyte made of organic solvent dissolved with lithium salt, said electrolyte being prepared by dissolving LiBF 4 with the use of a mixed solvent containing at least γ-butyrolactone; and the amount of lithium in the lithium absorbing alloy being not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt % relative to the aluminum containing alloy when the battery is charged.
Claim 10
Dependent Claim
110 words
A lithium secondary battery which comprises: a positive electrode made of vanadium pentoxide as a principle component; a negative electrode made of lithium absorbing alloy, said lithium absorbing alloy being an alloy containing aluminum as a principal component; an electrolyte made of organic solvent dissolved with lithium salt, said electrolyte being prepared by dissolving LiBF 4 with the use of a mixed solvent containing at least γ-butyrolactone; and the amount of lithium in the lithium absorbing alloy being not greater than 8 wt % relative to the weight of the vanadium pentoxide and not smaller than 4 wt % relative to the aluminum containing alloy when the battery is charged.
Claim 11
Dependent Claim
23 words
The battery as claimed in claim 7, wherein the mixed solvent is a mixture of equal amounts of γbutyrolactone, 1,2-dimethoxyethane and butylene carbonate.
Claim 12
Dependent Claim
23 words
The battery as claimed in claim 7, wherein the mixed solvent is a mixture of equal amounts of γ-butyrolactane, 1,2-dimethoxyethane and propylene carbonate.
Claim 13
Dependent Claim
22 words
The battery as claimed in claim 7, wherein the mixed solvent is a mixture of equal amounts of propylene carbonate and γ-butyrolactone.
Claim 14
Dependent Claim
22 words
The battery as claimed in claim 7, wherein the mixed solvent is a mixture of equal amounts of butylene carbonate and γ-butyrolactone.
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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |