US3762959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary battery with movable shutter means between fixed electrodes
Assignee: Boeing North American Inc
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Filing: 1971-03-29
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Granted: 1973-10-02
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Expires: 1991-03-29
Abstract
Abstract An electrically regenerable electrochemical system has a rotating apertured shutter between fixed negative and positive electrodes which provides both electrolyte circulation and pulsed charging to form deposits on the electrodes during the charge mode of the repeated charge and discharge cycles that are smooth, uniform and adherent. A zinc-nickel oxide secondary battery of this system is uniquely suited for use in hybrid vehicular power systems because of its ability to provide long cycle life at very high power densities under conditions of rapid cycling.
Inventors
- 👤 Coy L Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:43
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/4214; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
The electrochemical system according to claim 1 wherein the active material of said negative electrode is selected from lead, zinc, iron, cadmium and tin and at least a portion of a facing surface of said negative electrode is exposed to said alternating periods of maximum and minimum current density during operation of said system.
Claim 2
Dependent Claim
28 words
The electrochemical system according to claim 2 wherein the active material of said negative electrode is zinc and the active material of said positive electrode is nickel oxide.
Claim 3
Dependent Claim
39 words
The electrochemical system according to claim 1 wherein said shutter means comprises a rotatable apertured disk wherein the area of the open portion of the apertured disk constitutes between 30 and 80 per cent of the total disk area.
Claim 4
Dependent Claim
54 words
The electrochemical system according to claim 4 wherein the apertured disk is rotatable at a speed between 20 and and 200 rpm, an increasing apertured area being correlated with a decreasing speed of rotation so that the resultant alternating periods of maximum and minimum current density are between 20 and 200 cycles per second.
Claim 5
Dependent Claim
24 words
The electrochemical system according to claim 4 wherein the open portion of the apertured disk consists of from two to ten symmetrically disposed sectors.
Claim 6
Dependent Claim
95 words
The electrochemical system according to claim 6 wherein the active material of said negative electrode is zinc and the active material of said positive electrode is nickel oxide and said disk is disposed in cooperative relation with at least said negative electrode so that at least a portion of a facing surface thereof is exposed to said alternating periods of maximum and minimum current density during operation of said system to form adherent zinc deposits so that said system is capable of undergoing long cycle life at high power densities under conditions of rapid cycling.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |