US4137376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium sulphur batteries comprising a plurality of separate cells within a container
Assignee: Chloride Silent Power Ltd
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Filing: 1977-10-31
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Granted: 1979-01-30
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Expires: 1997-10-31
Abstract
Abstract A battery formed of sodium sulphur cells has each cell coated with an intumescent paint which is heated to produce a carbonaceous foam. This foam fills an outer housing around the cells or a separate containment around each cell and serves to confine material that might leak out of any damaged cell.
Inventors
- 👤 Gordon A. Clegg
- 👤 David R. Lauder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M50/00; H01M50/20; H01M50/233; H01M50/24; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
51 words
A sodium sulphur battery comprising a plurality of cells each having a container within which is a solid electrolyte separating sodium from a cathodic reactant, wherein the cells are formed into an assembly within an outer housing and wherein foamed carbon material is provided within the outer housing between the cells.
Claim 2
Dependent Claim
51 words
A sodium sulphur battery comprising a plurality of cells each having a container within which is a solid electrolyte separating sodium from a cathodic reactant, wherein the cells are formed into an assembly within an outer housing and wherein foamed carbon material is provided within the outer housing between the cells.
Claim 3
Dependent Claim
20 words
A sodium sulphur battery as claimed in claim 1 wherein the foamed carbon material is a substantially closed pore foam.
Claim 4
Dependent Claim
19 words
A sodium sulphur battery as claimed in claim 1 wherein the foamed carbon material is a carbonised polyurethane foam.
Claim 5
Dependent Claim
53 words
A sodium sulphur battery as claimed in claim 1 wherein the foamed carbon material is constituted by an intumescent paint applied to and dried upon the outside of the individual cell tubes prior to assembly of the battery and which has been caused to foam by heating after the battery has been assembled.
Claim 6
Dependent Claim
51 words
A sodium sulphur battery as claimed in claim 1 and comprising a plurality of sodium sulphur cells each having an outer metal casing of tubular form, the cells being assembled together in said outer housing with their axes parallel, the space between the cells being filled with the foamed carbon material.
Claim 7
Dependent Claim
28 words
A sodium sulphur battery as claimed in claim 1 and having, for each cell, an impermeable sheet forming a containment around each cell for the foamed carbon material.
Claim 8
Dependent Claim
17 words
A sodium sulphur battery as claimed in claim 6 wherein said impermeable sheet is a rigid sheet.
Claim 9
Dependent Claim
21 words
A sodium sulphur battery as claimed in claim 4 wherein the foamed intumescent material fills the outer housing around the cells.
Claim 10
Dependent Claim
26 words
A sodium sulphur battery as claimed in claim 4 and having a containment around each cell, which containments are each filled with the foamed intumescent material.
Claim 11
Dependent Claim
43 words
A sodium sulphur battery comprising a plurality of cells each having a container within which is a solid electrolyte separating sodium from a cathodic reactant, wherein the cells are formed into an assembly and wherein foamed carbon material is provided between the cells.
Claim 12
Dependent Claim
43 words
A sodium sulphur battery comprising a plurality of cells each having a container within which is a solid electrolyte separating sodium from a cathodic reactant, wherein the cells are formed into an assembly and wherein foamed carbon material is provided between the cells.
Claim 13
Dependent Claim
20 words
A sodium sulphur battery as claimed in claim 10 wherein the foamed carbon material is a substantially closed pore foam.
Claim 14
Dependent Claim
19 words
A sodium sulphur battery as claimed in claim 10 wherein the foamed carbon material is a carbonized polyurethane foam.
Claim 15
Dependent Claim
53 words
A sodium sulphur battery as claimed in claim 10 wherein the foamed carbon material is constituted by an intumescent paint applied to and dried upon the outside of the individual cell tubes prior to assembly of the battery and which has been caused to foam by heating after the battery has been assembled.
Claim 16
Dependent Claim
40 words
A cell for a sodium sulphur battery comprising: an outer housing, a container within said outer housing, within said container, a solid electrolyte separating sodium from a cathodic reactant, and foamed carbon material between said outer housing and said container.
Claim 17
Dependent Claim
40 words
A cell for a sodium sulphur battery comprising: an outer housing, a container within said outer housing, within said container, a solid electrolyte separating sodium from a cathodic reactant, and foamed carbon material between said outer housing and said container.
Claim 18
Dependent Claim
18 words
A cell as claimed in claim 14 wherein the foamed carbon material is a substantially closed pore foam.
Claim 19
Dependent Claim
17 words
A cell as claimed in claim 14 wherein the foamed carbon material is a carbonized polyurethane foam.
Claim 20
Dependent Claim
46 words
A cell as claimed in claim 14 wherein the foamed carbon material is constituted by an intumescent paint applied to and dried upon said container prior to installation within said outer housing and which has been caused to foam by heating after said cell is assembled.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |