US3148322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable battery with means to prevent overcharging
Assignee: Duracell Inc USA
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Filing: 1961-03-13
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Granted: 1964-09-08
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Expires: 1981-03-13
Abstract
No abstract record available.
Inventors
- 👤 James M Booe
- 👤 Wallace D Loftus
- 👤 Robert E Ralston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:39
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/4207; H01M50/00; H01M50/50; H01M50/572; H01M50/574; H02; H02J; H02J7/00; H02J7/50; H02J7/52; H02J7/54; H02J7/60; H02J7/61; H02J7/663; H01M2200/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A RECHARGEABLE ELECTRIC STORAGE BATTERY COMPRISING: A PLURALITY OF RECHARGEABLE ELECTRIC CELLS WHICH RESPECTIVELY PRODUCE PREDETERMINED MAXIMUM TERMINAL VOLTAGES UPON ATTAINING THE FULLY CHARGED CONDITION; MEANS CONNECTING SAID CELLS IN SERIES ADDITIVE RELATIONSHIP TO FORM A BATTERY; TERMINAL MEANS FOR SAID BATTERY BY WHICH A CHARGING VOLTAGE MAY BE APPLIED ACROSS SAID SERIES COMBINATION OF SAID CELLS AT LEAST EQUAL TO THE SUM OF THE MAXIMUM TERMINAL VOLTAGES THEREOF; AND A PLURALITY OF VOLTAGE-SENSITIVE CURRENT GATING MEANS RESPECTIVELY SHUNTING SAID CELLS, EACH OF SAID GATING MEANS HAVING SUCH CHARACTERISTICS AND POLARITY AS TO BE SUBSTANTIALLY NONCONDUCTIVE IN THE DIRECTION OF THE CHARGING CURRENT WHEN THE TERMINAL VOLTAGE PRODUCED ACROSS THE CELL SHUNTED THEREBY IS BELOW ITS PREDETERMINED MAXIMUM VALUE AND BECOMING HIGHLY CONDUCTIVE IN THE DIRECTION OF SAID CHARGING CURRENT WHEN THE TERMINAL VOLTAGE PRODUCED ACROSS SUCH CELL INCREMENTALLY EXCEEDS THAT VALUE; WHEREBY CHARGING CURRENT SUPPLIED TO THE BATTERY IS BYPASSED BY SAID GATING MEANS AROUND ANY CELL SHUNTED THEREBY WHICH HAS ATTAINED THE FULLY CHARGED CONDITION AND OVERCHARGE THEREOF IS PREVENTED.
Claim 2
Dependent Claim
172 words
A RECHARGEABLE ELECTRIC STORAGE BATTERY COMPRISING: A PLURALITY OF RECHARGEABLE ELECTRIC CELLS WHICH RESPECTIVELY PRODUCE PREDETERMINED MAXIMUM TERMINAL VOLTAGES UPON ATTAINING THE FULLY CHARGED CONDITION; MEANS CONNECTING SAID CELLS IN SERIES ADDITIVE RELATIONSHIP TO FORM A BATTERY; TERMINAL MEANS FOR SAID BATTERY BY WHICH A CHARGING VOLTAGE MAY BE APPLIED ACROSS SAID SERIES COMBINATION OF SAID CELLS AT LEAST EQUAL TO THE SUM OF THE MAXIMUM TERMINAL VOLTAGES THEREOF; AND A PLURALITY OF VOLTAGE-SENSITIVE CURRENT GATING MEANS RESPECTIVELY SHUNTING SAID CELLS, EACH OF SAID GATING MEANS HAVING SUCH CHARACTERISTICS AND POLARITY AS TO BE SUBSTANTIALLY NONCONDUCTIVE IN THE DIRECTION OF THE CHARGING CURRENT WHEN THE TERMINAL VOLTAGE PRODUCED ACROSS THE CELL SHUNTED THEREBY IS BELOW ITS PREDETERMINED MAXIMUM VALUE AND BECOMING HIGHLY CONDUCTIVE IN THE DIRECTION OF SAID CHARGING CURRENT WHEN THE TERMINAL VOLTAGE PRODUCED ACROSS SUCH CELL INCREMENTALLY EXCEEDS THAT VALUE; WHEREBY CHARGING CURRENT SUPPLIED TO THE BATTERY IS BYPASSED BY SAID GATING MEANS AROUND ANY CELL SHUNTED THEREBY WHICH HAS ATTAINED THE FULLY CHARGED CONDITION AND OVERCHARGE THEREOF IS PREVENTED.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |