US3767465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-chemical cells
Assignee: WER MVL 1998 Ltd
•
Filing: 1971-09-24
•
Granted: 1973-10-23
•
Expires: 1991-09-24
Abstract
Abstract A conducting metallic tag is welded to impregnated porous electrode material for an electro-chemical cell by forming a layer of sintered metal on the tag, the metal being selected so as not to interfere with the electro-chemical operation of the electrode when assembled in a cell, pressing the tag against the electrode material with the sintered metal adjacent the electrode material, and welding the two together by passage of electric current.
Inventors
- 👤 B Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:53
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/50; H01M50/531; H01M50/536; H01M50/534; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
15 words
A meThod according to claim 1 in which the metal on the tag is nickel.
Claim 2
Independent Claim
95 words
A method of welding a conducting metallic tag to electrode material consisting of porous sintered nickel on a support member, the sintered nickel being impregnated with material selected from the group consisting of oxides and hydroxides of electro-chemically active metals, which method comprises the steps of forming a layer of sintered nickel over an area of the tag, pressing the tag against the electrode material with the area of sintered nickel on the tag in contact with the impregnated sintered nickel on the electrode material, and welding the two together by passage of electric current.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 3, in which the porous electrode material is impregnated with non-metallic material selected from the oxides and hydroxides of nickel and cadmium.
Claim 4
Dependent Claim
20 words
A method according to claim 1, in which welding electrodes are used to press the tag against the electrode material.
Claim 5
Dependent Claim
18 words
A method according to claim 1, in which welding is effected by a short duration high current pulse.
Claim 6
Dependent Claim
38 words
An electrode for an electro-chemical cell having an impregnated porous surface to which a conducting metallic tag is welded by the method claimed in claim 1, thereby providing good electrical connection between the tag and the electrode material.
Claim 7
Dependent Claim
42 words
An electrode as claimed in claim 7 in which the electrode is in the form of an elongated strip which has a plurality of conducting metallic tags welded to it at intervals along its length by the method claimed in Claim 1.
Claim 8
Dependent Claim
23 words
An electro-chemical cell, or an electric battery having a number of such cells, having at least one electrode as claimed in claim 8.
Claim 9
Dependent Claim
23 words
A nickel cadmium electro-chemical cell having two impregnated electrodes, conducting tags being connected to each electrode by the method claimed in claim 3.
Claim 10
Dependent Claim
133 words
In a method of making an electro-chemical cell having an external casing member and an internal electrode between which electrical connection is to be made, the steps of: a. forming an internal electrode having a porous surface layer of metal impregnated with material selected from the group consisting of oxides and hydroxides of nickel and cadmium; b. forming a metal tag having a selected surface area portion thereof provided with a layer of sintered metal, which sintered metal will not interfere with the electro-chemical operation of the cell; c. contacting said layer of sintered metal in face-to-face opposition to said impregnated porous surface layer of metal of said internal electrode; d. joining said tag and said electrode mechanically and electrically by pressing them together while simultaneously passing a momentary electric current through them.
References Cited (Backward Citations)
US3108909A
Cited
US3607432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |