US4112202A
Expired / Lapsed
US
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Spirally wound electrochemical cell and method and apparatus for its production
Assignee: Hawker Energy Products Inc
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Filing: 1977-06-27
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Granted: 1978-09-05
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Expires: 1997-06-27
Abstract
Abstract A spirally wound element comprising opposite polarity plates and interleaved separator is described, for use in electrochemical cylindrically configured cells. The cell pack has a uniform predetermined cross section irrespective of variation in component thicknesses as long as such thicknesses are within specified tolerances. A dual head, belt-driven winder and method are also described for producing the spiral cell pack.
Inventors
- 👤 Leonard F. Hug
- 👤 Donald H. McClelland
- 👤 Toshio Uba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:18
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/10; B; B65; B65H; B65H2701/00; B65H2701/10; B65H2701/18; B65H2701/184; B65H2701/1846; G; G05; G05B; G05B2219/00; G05B2219/20; G05B2219/23; G05B2219/23371; H01M10/00; H01M10/04; H01M2010/0495; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/53; Y10T29/5313; Y10T29/53135; Y10T29/53139
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A spirally wound element of nominal design outside diameter for use in an electrochemical cell comprising: positive and negative flexible electrode plates interleaved with compressible separator layers, having a combined uncompressed nominal design thickness, the unwound and uncompressed thickness of the plates and separators combined being greater than one but less than about three percent away from the predetermined nominal design thickness; the outside diameter of the spirally wound element, in which the separator layers are compressed to a reduced thickness, characterized by having a predetermined dimension within plus or minus one percent of the nominal design outside diameter.
Claim 2
Dependent Claim
99 words
A spirally wound element of nominal design outside diameter for use in an electrochemical cell comprising: positive and negative flexible electrode plates interleaved with compressible separator layers, having a combined uncompressed nominal design thickness, the unwound and uncompressed thickness of the plates and separators combined being greater than one but less than about three percent away from the predetermined nominal design thickness; the outside diameter of the spirally wound element, in which the separator layers are compressed to a reduced thickness, characterized by having a predetermined dimension within plus or minus one percent of the nominal design outside diameter.
Claim 3
Dependent Claim
35 words
The spirally wound element of claim 1 further comprising a tail wrap member wound circumferentially about the outside of the wound element and adhered to itself to constrict the wound element to its wound dimension.
Claim 4
Dependent Claim
38 words
The spirally wound element of claim 1 wherein the unwound and uncompressed thickness of the plates and separators combined is in the range between two and three percent oversized or undersized, relative to the predetermined nominal design thickness.
Claim 5
Dependent Claim
86 words
A spirally wound plate/separator subassembly of a given nominal design outside diameter for use in an electrochemical cell comprising: positive and negative electrode plates and interleaved compressible separator, having a combined uncompressed nominal design thickness, spirally wound sufficiently tightly into a cylindrical element so that the separator is compressed; the spirally wound element having an outside diameter whose dimension percentagewise departs less from its nominal design outside diameter than the combined unwound and uncompressed thickness of the plates and separators departs from its nominal design thickness.
Claim 6
Dependent Claim
86 words
A spirally wound plate/separator subassembly of a given nominal design outside diameter for use in an electrochemical cell comprising: positive and negative electrode plates and interleaved compressible separator, having a combined uncompressed nominal design thickness, spirally wound sufficiently tightly into a cylindrical element so that the separator is compressed; the spirally wound element having an outside diameter whose dimension percentagewise departs less from its nominal design outside diameter than the combined unwound and uncompressed thickness of the plates and separators departs from its nominal design thickness.
Claim 7
Dependent Claim
25 words
The subassembly of claim 4 wherein the positive and negative plates are substantially equally spaced apart throughout the cross section of the spirally wound element.
Claim 8
Dependent Claim
17 words
A cylindrical spirally wound lead-acid cell comprising the subassembly of claim 5 fitted within a cylindrical container.
Claim 9
Dependent Claim
49 words
The subassembly of claim 4 wherein each plate carries at least three protruding tabs which are aligned along a radius of the cylindrical spirally wound element, and wherein the radially innermost tab and outermost tab protrude higher than the tab or tabs situated intermediate such innermost and outermost tabs.
Claim 10
Dependent Claim
103 words
A mechanically controlled dual head belt-wound electrode/separator spiral subassembly of nominal design outside diameter for use in electrochemical cells comprising: positive and negative flexible electrode plates interleaved with compressible separator layers, having a combined uncompressed nominal design thickness, the unwound and uncompressed thickness of the plates and separators combined being greater than one but less than about three percent away from the predetermined nominal design thickness; the outside diameter of the spirally wound element in which the separator layers are compressed to a reduced thickness, characterized by having a predetermined dimension within plus or minus one percent of the nominal design outside diameter.
Claim 11
Dependent Claim
103 words
A mechanically controlled dual head belt-wound electrode/separator spiral subassembly of nominal design outside diameter for use in electrochemical cells comprising: positive and negative flexible electrode plates interleaved with compressible separator layers, having a combined uncompressed nominal design thickness, the unwound and uncompressed thickness of the plates and separators combined being greater than one but less than about three percent away from the predetermined nominal design thickness; the outside diameter of the spirally wound element in which the separator layers are compressed to a reduced thickness, characterized by having a predetermined dimension within plus or minus one percent of the nominal design outside diameter.
Claim 12
Dependent Claim
87 words
A cam controlled belt-wound spiral electrode plate/separator subassembly of nominal design outside diameter for use in electrochemical cells comprising: positive and negative electrode plates and interleaved compressible separator, having a combined uncompressed nominal design thickness, spirally wound sufficiently tightly into a generally cylindrical element so that the separator is compressed; the spirally wound element having an outside diameter whose dimension percentagewise departs less from its nominal design outside diameter than the combined unwound and uncompressed thickness of the plates and separators departs from its nominal design thickness.
Claim 13
Dependent Claim
87 words
A cam controlled belt-wound spiral electrode plate/separator subassembly of nominal design outside diameter for use in electrochemical cells comprising: positive and negative electrode plates and interleaved compressible separator, having a combined uncompressed nominal design thickness, spirally wound sufficiently tightly into a generally cylindrical element so that the separator is compressed; the spirally wound element having an outside diameter whose dimension percentagewise departs less from its nominal design outside diameter than the combined unwound and uncompressed thickness of the plates and separators departs from its nominal design thickness.
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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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |