US3883367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium-sulfur storage battery
Assignee: Toyota Central R&D Labs Inc
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Filing: 1973-10-17
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Granted: 1975-05-13
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Expires: 1993-10-17
Abstract
Abstract A sodium-sulfur storage battery having as part of its sulfur electrode a porous current collector formed of knitted or woven carbon or graphite yarn of high elastic modulus and tensile strength so as to yield greater mobility of sodium polysulfide (Na2Sx) within the current collector. Also, highly improved current collecting function is attained by virtue of use of knitted or woven yarn, and excellent corrosion resistance and high mechanical strength is attained by virtue of the use of carbon yarn of high elastic modulus and tensile strength, resulting in a storage battery having excellent discharge performance and durability.
Inventors
- 👤 Takewo Chiku
- 👤 Takeshi Kogiso
- 👤 Kimie Kojima
- 👤 Takashi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:06
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/663; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A SODIUM-SULFUR STORAGE BATTERY COMPRISING IN COMBINATION A BATTERY CONTAINER, AT LEAST ONE NEGATIVE HALF-CELL UNIT WITHIN SAID BATTERY CONTAINER DEFINING A SODIUM CHAMBER, MOLTEN SODIUM WITHIN SAID SODIUM CHAMBER, A NEGATIVE CONDUCTOR EXTENDING FROM WITHIN SAID SODIUM CHAMBER, AT LEAST ONE POSITIVE HALF-CELL UNIT WITHIN SAID BATTERY CONTAINER DEFINING A SULFUR CHAMBER, MOLTEN SULFUR WITHIN SAID SULFUR CHAMBER, A POSITIVE CONDUCTOR,
Claim 2
Dependent Claim
62 words
A SODIUM-SULFUR STORAGE BATTERY COMPRISING IN COMBINATION A BATTERY CONTAINER, AT LEAST ONE NEGATIVE HALF-CELL UNIT WITHIN SAID BATTERY CONTAINER DEFINING A SODIUM CHAMBER, MOLTEN SODIUM WITHIN SAID SODIUM CHAMBER, A NEGATIVE CONDUCTOR EXTENDING FROM WITHIN SAID SODIUM CHAMBER, AT LEAST ONE POSITIVE HALF-CELL UNIT WITHIN SAID BATTERY CONTAINER DEFINING A SULFUR CHAMBER, MOLTEN SULFUR WITHIN SAID SULFUR CHAMBER, A POSITIVE CONDUCTOR,
Claim 3
Dependent Claim
23 words
A sodium-sulfur storage battery according to claim 1, further comprising a backing plate for holding said porous current collector against said solid electrolyte.
Claim 4
Dependent Claim
23 words
A sodium-sulfur storage battery according to claim 2, wherein said backing plate is formed of metallic material and has a plurality of holes.
Claim 5
Dependent Claim
17 words
A sodium-sulfur storage battery according to claim 1, wherein said solid electrolyte is formed of sodium Beta-alumina.
Claim 6
Dependent Claim
22 words
A sodium-sulfur storage battery according to claim 4, wherein said solid electrolyte and said porous current collector mesh are of tubular shape.
Claim 7
Dependent Claim
30 words
A sodium-sulfur storage battery according to claim 5, further comprising a tubular metallic backing plate having a plurality of holes, and wherein said battery container is of a tubular shape.
Claim 8
Dependent Claim
84 words
A sodium-sulfur storage battery according to claim 6, further comprising a tubular sodium reservoir in said negative half-cell unit at the upper end of said tubular solid electrolyte, and a pair of plugs at the top of said negative and positive half-cell units, and wherein said backing plate has upper and lower ends being outwardly bent to form a plurality of sharp edged lugs which bite into the interior surface of said tubular battery container, and said battery container is formed of metallic material.
Claim 9
Dependent Claim
41 words
A sodium-sulfur storage battery according to claim 7, wherein said tubular porous current collector mesh is formed of braided carbon yarn composed of carbon monofilaments having an elastic modulus of about 20 tons/mm2 and a tensile strength of about 200 kg/mm2.
Claim 10
Dependent Claim
48 words
A sodium-sulfur storage battery according to claim 7, wherein said porous current collector mesh is formed of plain woven pieces of cloth of carbon yarns, said yarns being composed of carbon monofilaments having the elastic modulus of about 20 tons/mm2 and thE tensile strength of about 200 kg/mm2.
Claim 11
Dependent Claim
47 words
A sodium-sulfur storage battery according to claim 7, wherein said porous current collector mesh is formed of carbon yarn knitted in long stitches, said carbon yarn being composed of carbon monofilaments having an elastic modulus of about 20 tons/mm2 and a tensile strength of about 200 kg/mm2.
Claim 12
Dependent Claim
23 words
A sodium-sulfur storage battery according to claim 1, wherein said porous current collector mesh is formed of said carbon yarn knitted in stitches.
Claim 13
Dependent Claim
23 words
A sodium-sulfur storage battery according to claim 1, wherein said porous current collector mesh is formed of said carbon yarn in woven state.
Claim 14
Dependent Claim
21 words
A sodium-sulfur storage battery according to claim 1, wherein said porous current collector mesh is formed of said carbon yarn braided.
Claim 15
Dependent Claim
21 words
A sodium-sulfur storage battery according to claim 1, wherein said porous current collector mesh is formed of said carbon yarn twilled.
References Cited (Backward Citations)
US3313596A
Cited
US3404035A
Cited
US3413150A
Cited
US3533743A
Cited
US3635675A
Cited
US3767773A
Cited
US3756856A
Cited
US3770502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |