US3915741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium-sulfur cell with improved separator
Assignee: Toyota Central R&D Labs Inc
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Filing: 1974-07-17
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Granted: 1975-10-28
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Expires: 1994-07-17
Abstract
Abstract A sodium-sulfur cell having improved safety features and a high level of performance, embodying a solid electrolyte separator with a plurality of elongated small holes extending in side-byside relation through the separator in parallel relationship with the major surfaces of the separator, the separator having at least one passage formed therein to function as a reservoir for delivering molten sodium to the elongated holes.
Inventors
- 👤 Takeshi Kogiso
- 👤 Hiroaki Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M50/00; H01M50/40; H01M50/463; H01M50/469; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
42 words
A SOLID ELECTROLYTIC SEPARATOR COMPRISING A BODY OF SOLID ELECTROLYTE HAVING A PLURALITY OF SMALL HOLES EXTENDING IN SIDEBY-SIDE RELATION IN PROXIMITY TO THE OUTER SURFACEOF SAID BODY AND PARALLEL THERETO SAID BODY HAVING A PASSAGE FORMED THEREIN COMMUNICATING WITH SAID HOLES.
Claim 2
Dependent Claim
42 words
A SOLID ELECTROLYTIC SEPARATOR COMPRISING A BODY OF SOLID ELECTROLYTE HAVING A PLURALITY OF SMALL HOLES EXTENDING IN SIDEBY-SIDE RELATION IN PROXIMITY TO THE OUTER SURFACEOF SAID BODY AND PARALLEL THERETO SAID BODY HAVING A PASSAGE FORMED THEREIN COMMUNICATING WITH SAID HOLES.
Claim 3
Dependent Claim
23 words
A separator according to claim 1 in which said holes have circular cross-sections and diameters in the range from 0.3 to 3.0 millimeters.
Claim 4
Dependent Claim
23 words
A separator according to claim 1 in which said holes have oval cross-sections with their major axes extending parallel to said outer surface.
Claim 5
Dependent Claim
43 words
A separator according to claim 1 in which said body is in the form of a flat plate, said passage being formed in an edge of the plate and said holes extending from said passage to near the opposite edge of said plate.
Claim 6
Dependent Claim
28 words
A separator according to claim 4 in which a second passage is formed in the opposite edge, said second passage connecting to the botton ends of said holes.
Claim 7
Dependent Claim
30 words
A separator according to claim 1 wherein said body is in the form of a flat plate having at least one ridge formed integrally on the surface of said plate.
Claim 8
Dependent Claim
23 words
A separator according to claim 1 in which said body is cylindrical and said holes extend parallel to the axis of the cylinder.
Claim 9
Dependent Claim
31 words
A separator according to claim 1 wherein said body has a flange portion and a lid secured to said flange portion, said flange portion and said lid defining said passage therebetween.
Claim 10
Dependent Claim
29 words
A separator accoring to claim 1 wherein the shortest distance between the inner surfaces of said holes and the outer surfaces of said body is less than 3 millimeters.
Claim 11
Dependent Claim
21 words
A separator according to claim 1 wherein the distances between the peripheries of adjoining small holes is less than 3 millimeters.
Claim 12
Dependent Claim
15 words
A separator according to claim 1 wherein the solid electrolyte consists essentially of beta alumina.
Claim 13
Dependent Claim
63 words
A solid electrolyte separator comprising a rectangular flat body made of a solid electrolyte and having a thickness of about 3 millimeters, said body having a passage formed in one edge portion thereof and a plurality of straight holes of a diameter of about 1.5 millimeters extending in side-by-side relation from said passage to near the opposite edge of said rectangular flat plate.
Claim 14
Dependent Claim
63 words
A solid electrolyte separator comprising a rectangular flat body made of a solid electrolyte and having a thickness of about 3 millimeters, said body having a passage formed in one edge portion thereof and a plurality of straight holes of a diameter of about 1.5 millimeters extending in side-by-side relation from said passage to near the opposite edge of said rectangular flat plate.
Claim 15
Dependent Claim
70 words
A solid electrolytic separator comprising a main portion having a rectangular flat plate, said main portion having a plurality of straight holes extending in side-by-side relation from one of the edges of said rectangular flat plate to the opposite edge thereof, said plate having two flange portions provided on both edges and two rib portions secured to said flange portions so as to define two passages connecting with the holes.
Claim 16
Dependent Claim
70 words
A solid electrolytic separator comprising a main portion having a rectangular flat plate, said main portion having a plurality of straight holes extending in side-by-side relation from one of the edges of said rectangular flat plate to the opposite edge thereof, said plate having two flange portions provided on both edges and two rib portions secured to said flange portions so as to define two passages connecting with the holes.
Claim 17
Dependent Claim
112 words
A SODIUM-SULFUR CELL COMPRISING A SOLID ELECTROLYTIC SEPARATOR HAVING A BODY OF SOLID ELECTROLYTE AND A PLURALITY OF ELONGATED SMALL HOLES EXTENDING IN SIDE-SIDE RELATION IN THE PORTION NEAR THE SURFACE OF SAID BODY AND IN PARALLEL WITH THE OUTER SURFACE OF SAID BODY SAID BODY HAVING AT LEAST ONE PASSAGE FORMED THEREIN CONNECED TO SAID ELONGATED SMALL HOLES A RESERVOIR FOR HOLDING MOLTEN SODIUM CONNECTING MEANS BETWEEN SAID RESERRVOIR AND SAID SEPARATOR FOR COMMUNICATING SAID MOLTEN SODIUM THERETO A HOUSING FOR CONTANING MOLTEN SULFUR, EN ELECTRIC CONNECTOR IMMERSED IN SAID MOLTEN SULFUR, A POSITIVE POLE ELECTRICALLY CONNECTED TO SAID MOLTEN SODIUM AND A NEGATIVE POLE ELECTRICALLY CONNECTED TO SAID ELECTRIC COLLECTOR.
Claim 18
Dependent Claim
112 words
A SODIUM-SULFUR CELL COMPRISING A SOLID ELECTROLYTIC SEPARATOR HAVING A BODY OF SOLID ELECTROLYTE AND A PLURALITY OF ELONGATED SMALL HOLES EXTENDING IN SIDE-SIDE RELATION IN THE PORTION NEAR THE SURFACE OF SAID BODY AND IN PARALLEL WITH THE OUTER SURFACE OF SAID BODY SAID BODY HAVING AT LEAST ONE PASSAGE FORMED THEREIN CONNECED TO SAID ELONGATED SMALL HOLES A RESERVOIR FOR HOLDING MOLTEN SODIUM CONNECTING MEANS BETWEEN SAID RESERRVOIR AND SAID SEPARATOR FOR COMMUNICATING SAID MOLTEN SODIUM THERETO A HOUSING FOR CONTANING MOLTEN SULFUR, EN ELECTRIC CONNECTOR IMMERSED IN SAID MOLTEN SULFUR, A POSITIVE POLE ELECTRICALLY CONNECTED TO SAID MOLTEN SODIUM AND A NEGATIVE POLE ELECTRICALLY CONNECTED TO SAID ELECTRIC COLLECTOR.
Claim 19
Dependent Claim
34 words
A sodium-sulfur cell according to claim 14 wherein said connecting means is a metal tube having an inner diameter in the range from 0.2 to 2.5 millimeters, and said reservoir is made of metal.
Claim 20
Dependent Claim
35 words
A sodium-sulfur cell according to claim 15 which includes a space between said reservoir and said separator, an inorganic porous body in said space, and an inorganic heat insulator about said reservoir and said separator.
Claim 21
Dependent Claim
22 words
A sodium-sulfur cell according to claim 16 wherein said inorganic porous body and said inorganic heat insulator are composed of inorganic fibers.
Claim 22
Dependent Claim
19 words
A sodium-sulfur cell according to claim 14 wherein said connecting means are in the form of a coiled tube.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |