US4092464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible cells and batteries formed therefrom
Assignee: Duracell Inc USA
•
Filing: 1976-07-19
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Granted: 1978-05-30
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Expires: 1996-07-19
Abstract
Abstract A high energy density cell or battery capable of undergoing flexular stress with little effect on its discharge properties either during and after subjection to stress.
Inventors
- 👤 Arabinda N. Dey
- 👤 Per Bro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:24
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M50/00; H01M50/10; H01M50/172; H01M50/174; H01M50/178; H01M50/50; H01M50/543; H01M50/562; H01M6/00; H01M6/14; H01M6/16; H01M50/564; H01M50/566; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
89 words
A cathodic structure for a flexible electrochemical cell comprising a compressed mixture of a powdered cathode active material, chopped graphite fibers, and a binder; said mixture being affixed to a flexible metallic current collector; a metal tab affixed to said collector; and said compressed mixture and said current collector being sealed within a plastic pouch with said metallic tab extending therethrough; the plastic of said plastic pouch having sufficient porosity to permit ionic flow therethrough, and the pores thereof being sufficiently small that solid particles will not pass therethrough.
Claim 2
Dependent Claim
89 words
A cathodic structure for a flexible electrochemical cell comprising a compressed mixture of a powdered cathode active material, chopped graphite fibers, and a binder; said mixture being affixed to a flexible metallic current collector; a metal tab affixed to said collector; and said compressed mixture and said current collector being sealed within a plastic pouch with said metallic tab extending therethrough; the plastic of said plastic pouch having sufficient porosity to permit ionic flow therethrough, and the pores thereof being sufficiently small that solid particles will not pass therethrough.
Claim 3
Dependent Claim
14 words
The cathodic structure of claim 1 wherein said compressed mixture further includes graphite powder.
Claim 4
Dependent Claim
17 words
The cathodic structure of claim 1 wherein said structure has a total thickness less than 40 mils.
Claim 5
Dependent Claim
19 words
The cathodic structure of claim 1 wherein said mixture contains at least 50 percent cathode active material by weight.
Claim 6
Dependent Claim
17 words
The cathodic structure of claim 1 wherein said mixture contains at least 0.1% graphite fibers by weight.
Claim 7
Dependent Claim
19 words
The cathodic structure of claim 1 wherein said cathode active material is silver chromate (Ag 2 CrO 4 ).
Claim 8
Dependent Claim
17 words
The cathodic structure of claim 1 wherein said plastic is a heat sealable, flexible, microporous polymeric material.
Claim 9
Dependent Claim
44 words
The cathodic structure of claim 1 wherein said metallic current collector is an expanded metal with the metals of said current collector and said tab being individually selected from the group consisting of stainless steel, tantalum, titanium, molybdenum, zirconium, niobium, vanadium, chromium, and tungsten.
Claim 10
Dependent Claim
59 words
A flexible, non-gassing, high energy density electrochemical cell comprising a flexible, active metal anode having an electrically conductive tab operatively associated therewith; an organic electrolyte; a cathodic structure as defined in claim 1; and an outer, flexible, electrolyte impermeable container hermetically sealed around said anode, said electrolyte and said cathodic structure, with said tabs extending through said outer container.
Claim 11
Dependent Claim
34 words
A cell as in claim 9 wherein said anode substantially surrounds said cathodic structure, and a plastic pouch is positioned inside said outer container and sealed around both said anode and said cathodic structure.
Claim 12
Dependent Claim
31 words
A cell as in claim 9 wherein said anode is affixed to a flexible, expanded metal, current collector and said tab associated with said anode is affixed to said current collector.
Claim 13
Dependent Claim
32 words
A cell as in claim 11 wherein said anode comprises segmented portions of said active metal in close proximity to one another and arranged in a parallel direction on said current collector.
Claim 14
Dependent Claim
17 words
A cell as in claim 9 wherein said anode has a thickness less than about 20 mils.
Claim 15
Dependent Claim
12 words
A cell as in claim 9 wherein said active metal is lithium.
Claim 16
Dependent Claim
14 words
A cell as in claim 14 wherein said cathode active material is silver chromate.
Claim 17
Dependent Claim
17 words
A cell as in claim 9 wherein said cell has a thickness less than about 100 mils.
Claim 18
Dependent Claim
18 words
A cell as in claim 15 wherein said electrolyte comprises an electrolyte salt dissolved in an organic solvent.
Claim 19
Dependent Claim
32 words
A cell as in claim 9 wherein said outer container is a three layer, flexible composite of a metal foil sandwiched between two layers of a non-electrically conductive, heat sealable polymeric material.
Claim 20
Dependent Claim
51 words
A multicell battery comprising two contiguous sheets of polymeric material having a plurality of the cells defined in claim 9 positioned therebetween in spaced relationship to each other, said sheets of polymeric material being sealed to each other around said cells, and said cells being operatively, electrically connected to each other.
References Cited (Backward Citations)
US2003494A
Cited
US2880259A
Cited
US2851509A
Cited
US3013100A
Cited
US3023259A
Cited
US3192071A
Cited
US3239380A
Cited
US3375136A
Cited
US3674562A
Cited
US3708340A
Cited
US3658592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |