US4237411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge maintenance and continuous charging for storage batteries
Assignee: VARTA Batterie AG
•
Filing: 1978-09-11
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Granted: 1980-12-02
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Expires: 1998-09-11
Abstract
Abstract After-charge current is supplied at intervals T for periods T N at intensities determined by the prevailing battery temperature.
Inventors
- 👤 Hans K. Kothe
- 👤 Gunter Strasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:44
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/971; H02J7/975; H02J7/977
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A method of charge maintenance and continuous charging of storage batteries, and particularly of nickel cadmium batteries with sinter plates, through periodic supplying of charge quantities with predetermined programmed relationships, the method comprising supplying to the storage battery at predetermined substantially uniform intervals T a current I L lasting for an also predetermined substantially uniform after-charge period T N , the intensity of said current being determined by the prevailing storage battery temperature ν so as to increase with increasing temperature and decrease with decreasing temperature.
Claim 2
Independent Claim
86 words
A method of charge maintenance and continuous charging of storage batteries, and particularly of nickel cadmium batteries with sinter plates, through periodic supplying of charge quantities with predetermined programmed relationships, the method comprising supplying to the storage battery at predetermined substantially uniform intervals T a current I L lasting for an also predetermined substantially uniform after-charge period T N , the intensity of said current being determined by the prevailing storage battery temperature ν so as to increase with increasing temperature and decrease with decreasing temperature.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the charge quantities are supplied by a DC current with ripples, and whose arithmetic average corresponds to the temperature-controlled charging current I L .
Claim 4
Dependent Claim
65 words
The method of claim 1 wherein, during any given after-charge period T N , the current I L of intensity determined by the storage battery temperature is supplied only until a limiting voltage U 3 is reached, and thereafter the charging is continued at the said limiting voltage U 3 with decreasing current up to the end of the given after-charge period T N .
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein the after-charge period T N has a duration of between 0.5 and 10 minutes per interval T.
Claim 6
Dependent Claim
16 words
The method of claim 4 wherein the interval T has a duration of about one hour.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the value of the current I L is approximately 10I 10 at 40° C.
Claim 8
Dependent Claim
40 words
The method of claim 3 wherein the battery is an open alkaline storage battery, and the duration of the portion of the after-charge period T N during which the current intensity I L is determined by battery temperature progressively decreases.
References Cited (Backward Citations)
US2715710A
Cited
US3252070A
Cited
US3487284A
Cited
US3595707A
Cited
US3614584A
Cited
US3944904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |