US4039730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage battery electrode tubes and method of filling
Assignee: VARTA Batterie AG
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Filing: 1976-02-09
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Granted: 1977-08-02
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Expires: 1996-02-09
Abstract
Abstract Tubular battery electrodes are filled with a mix of lead oxide, sulfuric acid and water to which electrolyte-resistant fibers have been added. These fibers strengthen the mass and reduce its tendency to escape through the pores of the tube envelope fabric. Also the product resulting from this method.
Inventors
- 👤 Jurgen Brinkmann
- 👤 Josef Sucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:45
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/14; H01M4/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
47 words
A mass-filled tubular electrode for a lead storage battery comprising: active mass formed of a mixture of lead oxide, sulfuric acid and water, and including fibers of electrolyte-resistant material, the fibers being more densely concentrated toward the outer periphery of the tubular electrode than toward the interior.
Claim 2
Dependent Claim
47 words
A mass-filled tubular electrode for a lead storage battery comprising: active mass formed of a mixture of lead oxide, sulfuric acid and water, and including fibers of electrolyte-resistant material, the fibers being more densely concentrated toward the outer periphery of the tubular electrode than toward the interior.
Claim 3
Dependent Claim
29 words
The electrode of claim 1 wherein the tubular electrode is enclosed in a fabric and at least some of the fibers occlude portions of the pores of the fabric.
Claim 4
Dependent Claim
14 words
The electrode of claim 2 wherein the fibers have a rough and jagged surface.
Claim 5
Dependent Claim
15 words
The electrode of claim 3 wherein the fibers are of unprecoated glass or plastic material.
Claim 6
Dependent Claim
10 words
The electrode of claim 4 wherein the material is polyethylene.
Claim 7
Independent Claim
107 words
A method of filling the lead core-containing tube electrodes of lead storage batteries by introduction under pressure of paste-like active mass formed of a mixture of lead oxide, sulfuric acid and water, the method being characterized in that the active mass additionally has previously had added to it a quantity of fibers of electrolyte-resistant material, and the pressure applied and viscosity of the mixture is such as to cause at least a part of said fibers to penetrate into and be trapped within the pores of the tube walls during escape of a liquid mass component through the tube wall to at least partly occlude the pores.
Claim 8
Independent Claim
107 words
A method of filling the lead core-containing tube electrodes of lead storage batteries by introduction under pressure of paste-like active mass formed of a mixture of lead oxide, sulfuric acid and water, the method being characterized in that the active mass additionally has previously had added to it a quantity of fibers of electrolyte-resistant material, and the pressure applied and viscosity of the mixture is such as to cause at least a part of said fibers to penetrate into and be trapped within the pores of the tube walls during escape of a liquid mass component through the tube wall to at least partly occlude the pores.
Claim 9
Dependent Claim
49 words
The method of claim 6 wherein the paste-like mass contains 100 to 600 cm 3 water, and 5 to 130 cm 3 sulfuric acid of 1.4 grams per cm 3 density, per kilogram of lead oxide, and 0.1 to 2% by weight of fibers relative to the lead oxide.
Claim 10
Dependent Claim
11 words
The method of claim 6 wherein the fibers include glass fibers.
Claim 11
Dependent Claim
13 words
The method of claim 6 wherein the fibers include fibers of electrolyte-resistant plastic.
Claim 12
Dependent Claim
36 words
The method of claim 6 wherein the fibers are from 1 to 6 millimeters long and preferably 1.5 to 3 millimeters, and have a diameter of 5 to 30 microns, and preferably 8 to 20 microns.
Claim 13
Dependent Claim
14 words
The method of claim 6 wherein the fibers have a rough and jagged surface.
Claim 14
Dependent Claim
33 words
The method of claim 6 wherein the pressure applied is such as to cause the fibers to become more densely concentrated toward the outer periphery of the tubular electrode than in the interior.
Claim 15
Dependent Claim
12 words
The method of claim 6 wherein the introducing is by injection molding.
Claim 16
Dependent Claim
11 words
The mass-filled tube electrodes made by the method of claim 6.
Claim 17
Dependent Claim
11 words
The method of claim 11 wherein the fibers are of polyethylene.
Claim 18
Dependent Claim
35 words
The method of claim 15 wherein the fibers are 0.5 to 6 millimeters long and preferably 1 to 3 millimeters, and have a diameter of 0.5 to 5 microns, and preferably 1 to 3 microns.
Claim 19
Dependent Claim
24 words
The method of claim 12 wherein the pressure is such as to cause the pores of the tube wall to become distended during filling.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |