US4207389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state cells
Assignee: Duracell Inc USA
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Filing: 1978-10-30
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Granted: 1980-06-10
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Expires: 1998-10-30
Abstract
Abstract The manufacture of solid state cells with smearable cathode materials subject to radial expansion during cell discharge is improved by the consolidation of such materials within a radially rigid non-flexible wall-retaining member which serves as a jig for the cathode during the fabrication of the cell, and which is thereafter retained in the cell structure to control such radial expansion.
Inventors
- 👤 Philip B. Gunther
- 👤 Robert Nikitopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/36; H01M4/58; H01M6/00; H01M6/14; H01M6/18; H01M6/188
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A solid state electrochemical cell comprising a solid anode, a solid cathode and, a solid electrolyte therebetween in a container and a rigid non-flexible wall retaining member between said container and said cathode which completely surrounds and directly retains the lateral walls of said cathode wherein said cathode is subject to radial expansion during discharge of said cell, and said cathode having been pressure consolidated within said wall retaining member whereby radial expansion of said cathode is substantially contained thereby.
Claim 2
Dependent Claim
80 words
A solid state electrochemical cell comprising a solid anode, a solid cathode and, a solid electrolyte therebetween in a container and a rigid non-flexible wall retaining member between said container and said cathode which completely surrounds and directly retains the lateral walls of said cathode wherein said cathode is subject to radial expansion during discharge of said cell, and said cathode having been pressure consolidated within said wall retaining member whereby radial expansion of said cathode is substantially contained thereby.
Claim 3
Dependent Claim
12 words
The solid state cell of claim 1 wherein said anode is lithium.
Claim 4
Dependent Claim
16 words
The solid state cell of claim 2 wherein said electrolyte is comprised of a lithium halide.
Claim 5
Dependent Claim
31 words
The solid state cell of claim 3 wherein said solid cathode subject to radial expansion contains a material selected from the group consisting of lead sulfide, lead iodide, and mixtures thereof.
Claim 6
Dependent Claim
17 words
The solid state cell of claim 4 wherein said member is in the shape of a cup.
Claim 7
Dependent Claim
21 words
The solid state cell of claim 5 wherein said cup is partially open at its bottom with a concentrically circular cutout.
Claim 8
Dependent Claim
18 words
The solid state cell of claim 6 wherein said partially opened bottom cup is comprised of stainless steel.
Claim 9
Dependent Claim
25 words
The solid state cell of claim 7 wherein said cup directly retains all of the lateral walls of said cathode and part of said electrolyte.
References Cited (Backward Citations)
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Cited
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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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |