US6291097B1
Expired / Lapsed
US
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Grid placement in lithium ion bi-cell counter electrodes
Assignee: Valence Technology Inc
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Filing: 2000-05-11
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Granted: 2001-09-18
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Expires: 2020-05-11
Abstract
Abstract Disclosed herein is a battery design for bi-cell polymer matrix batteries. Each bi-cell comprises, sequentially, a first counter electrode, a first separator membrane, a centrally located electrode, a second separator membrane, and a second counter electrode. The current collector of each of the counter electrodes is positioned other than medially within the counter electrode. Generally, the current collector of the counter electrode is located within the outer half of the counter electrode. When the current collector is located at the extreme outer edge of the counter electrode, a capping film of polymer matrix material is preferably laminated to the perforated current collector, and, through the perforated current collector, to the counter electrode material itself.
Inventors
- 👤 Jeremy Barker
- 👤 Wade Guindy
- 👤 Howard Kisner
- 👤 Porter Mitchell
- 👤 Mohammad Parsian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:22
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M10/00; H01M10/04; H01M10/0436; H01M10/06; H01M10/12; H01M10/126; H01M10/24; H01M10/28; H01M10/287; H01M6/00; H01M6/04; H01M6/06; H01M6/12; H01M10/05; H01M10/052; H01M2004/026; H01M4/04; H01M4/64; H01M4/70; H01M4/72; H01M4/74; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
58 words
An improved structure for a laminate bi-cell battery, said laminate bi-cell comprising, sequentially, (i) a first counter electrode; (ii) a first separator element; (iii) a central electrode; (iv) a second separator element; and (v) a second counter electrode; wherein at least one of said first and second counter electrodes includes a current collector which is not medially positioned.
Claim 2
Dependent Claim
58 words
An improved structure for a laminate bi-cell battery, said laminate bi-cell comprising, sequentially, (i) a first counter electrode; (ii) a first separator element; (iii) a central electrode; (iv) a second separator element; and (v) a second counter electrode; wherein at least one of said first and second counter electrodes includes a current collector which is not medially positioned.
Claim 3
Dependent Claim
32 words
An improved bi-cell of claim 1 wherein at least one of said first and second counter electrodes includes a current collector which is positioned within the outer half of the counter electrode.
Claim 4
Dependent Claim
55 words
An improved bi-cell of claim 1 wherein said first counter electrode and said second counter electrode each includes an inner surface and an outer surface, and wherein at least one of said first counter electrode and said second counter electrode includes a current collector which is positioned at the outer surface of the counter electrode.
Claim 5
Dependent Claim
33 words
An improved bi-cell of claim 3 wherein each of said first counter electrode and said second counter electrode includes a current collector which is positioned at the outer surface of the counter electrode.
Claim 6
Dependent Claim
22 words
An improved bi-cell of claim 4 further comprising an electrochemically inert polymer matrix film adjacent to and outside of the current collector.
Claim 7
Dependent Claim
17 words
An improved bi-cell of claim 5 wherein said electrochemically inert polymer matrix film is a PVdF:HFP copolymer.
Claim 8
Dependent Claim
18 words
An improved bi-cell of claim 1 further comprising at least two bi-cells electrically connected to form a battery.
Claim 9
Dependent Claim
24 words
An improved bi-cell of claim 1 wherein said first counter electrode and said second counter electrode are anodic, and said central electrode is cathodic.
Claim 10
Dependent Claim
24 words
An improved bi-cell of claim 1 wherein said first counter electrode and said second counter electrode are cathodic, and said central electrode is anodic.
Claim 11
Dependent Claim
106 words
An improved structure for a laminate bi-cell battery, said bi-cell comprising, sequentially, (i) a first counter electrode having an inner half located proximal to a central electrode and an outer half located distal to the central electrode; (ii) a first separator element; (iii) a central electrode; (iv) a second separator element; and (v) a second counter electrode having an inner half located proximal to the central electrode and an outer half located distal to the central electrode; wherein at least one of said first and second counter electrodes includes a current collector which is located in the outer half of said at least one counter electrode.
Claim 12
Dependent Claim
106 words
An improved structure for a laminate bi-cell battery, said bi-cell comprising, sequentially, (i) a first counter electrode having an inner half located proximal to a central electrode and an outer half located distal to the central electrode; (ii) a first separator element; (iii) a central electrode; (iv) a second separator element; and (v) a second counter electrode having an inner half located proximal to the central electrode and an outer half located distal to the central electrode; wherein at least one of said first and second counter electrodes includes a current collector which is located in the outer half of said at least one counter electrode.
Claim 13
Dependent Claim
33 words
An improved bi-cell of claim 10 wherein each of said first counter electrode and said second counter electrode includes a current collector which is positioned within the outer half of the counter electrode.
Claim 14
Dependent Claim
55 words
An improved bi-cell of claim 10 wherein said first counter electrode and said second counter electrode each includes an inner surface and an outer surface, and wherein at least one of said first counter electrode and said second counter electrode includes a current collector which is positioned at the outer surface of the counter electrode.
Claim 15
Dependent Claim
33 words
An improved bi-cell of claim 12 wherein each of said first counter electrode and said second counter electrode includes a current collector which is positioned at the outer surface of the counter electrode.
Claim 16
Dependent Claim
23 words
An improved bi-cell of claim 13 further comprising an electrochemically inert polymer matrix film laminated adjacent to and outside of the current collector.
Claim 17
Dependent Claim
17 words
An improved bi-cell of claim 14 wherein said electrochemically inert polymer matrix film is a PVdF:HFP copolymer.
Claim 18
Dependent Claim
18 words
An improved bi-cell of claim 10 further comprising at least two bi-cells electrically connected to form a battery.
Claim 19
Dependent Claim
24 words
An improved bi-cell of claim 10 wherein said first counter electrode and said second counter electrode are anodic, and said central electrode is cathodic.
Claim 20
Dependent Claim
24 words
An improved bi-cell of claim 10 wherein said first counter electrode and said second counter electrode are cathodic, and said central electrode is anodic.
Claim 21
Dependent Claim
109 words
An improved structure for bi-cell batteries comprising, sequentially: (i) a first counter electrode; (ii) a first separator element; (iii) a central electrode comprising, sequentially, a first central electrode film, a central electrode current collector, and a second central electrode film; (iv) a second separator element; and (v) a second counter electrode; wherein at least one of said first counter electrode and said second counter electrode comprises, sequentially, an inner counter electrode film, a counter electrode current collector, and an outer counter electrode film; and wherein said inner counter electrode film comprises an active material mass which is greater than the active material mass of said outer counter electrode film.
Claim 22
Dependent Claim
109 words
An improved structure for bi-cell batteries comprising, sequentially: (i) a first counter electrode; (ii) a first separator element; (iii) a central electrode comprising, sequentially, a first central electrode film, a central electrode current collector, and a second central electrode film; (iv) a second separator element; and (v) a second counter electrode; wherein at least one of said first counter electrode and said second counter electrode comprises, sequentially, an inner counter electrode film, a counter electrode current collector, and an outer counter electrode film; and wherein said inner counter electrode film comprises an active material mass which is greater than the active material mass of said outer counter electrode film.
Claim 23
Dependent Claim
41 words
The structure of claim 19 wherein, on the basis of 100 parts by weight of counter electrode active material mass, said inner counter electrode film constitutes at least 75 parts by weight and said outer counter electrode film constitutes the balance.
Claim 24
Dependent Claim
41 words
The structure of claim 19 wherein, on the basis of 100 parts by weight of counter electrode active material mass, said inner counter electrode film constitutes at least 80 parts by weight and said outer counter electrode film constitutes the balance.
Claim 25
Dependent Claim
23 words
The stricture of claim 19 wherein said first counter electrode and said second counter electrode are anodic, and said central electrode is cathodic.
Claim 26
Dependent Claim
23 words
The structure of claim 19 wherein said first counter electrode and said second counter electrode are cathodic, and said central electrode is anodic.
Claim 27
Dependent Claim
97 words
An improved structure for a bi-cell battery comprising, sequentially: (i) a first counter electrode; (ii) a first separator element; (iii) a central electrode; (iv) a second separator element; and (v) a second counter electrode; and wherein at least one of said first and second counter electrodes includes an inner surface, an outer surface and a mass of active material and wherein more than 50% of said active material mass is positioned between said inner surface and said current collector and the balance of said active material mass is positioned at the outer surface of said counter electrode.
Claim 28
Dependent Claim
97 words
An improved structure for a bi-cell battery comprising, sequentially: (i) a first counter electrode; (ii) a first separator element; (iii) a central electrode; (iv) a second separator element; and (v) a second counter electrode; and wherein at least one of said first and second counter electrodes includes an inner surface, an outer surface and a mass of active material and wherein more than 50% of said active material mass is positioned between said inner surface and said current collector and the balance of said active material mass is positioned at the outer surface of said counter electrode.
Claim 29
Dependent Claim
24 words
The structure of claim 24 wherein at least 75% of said active material mass is positioned between said inner surface and said current collector.
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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) | 2004-09-17 | 2005-03-19 | 2005-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-09-17 | 2009-03-19 | 2009-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-09-17 | 2013-03-19 | 2013-09-18 | $7700.00 | Window Closed / Lapsed |