Patent US3732481A successfully refreshed from Google Patents.
US3732481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for charging batteries
Assignee: Individual
•
Filing: 1970-05-07
•
Granted: 1973-05-08
•
Expires: 1990-05-07
Abstract
Abstract A method and apparatus for rapidly charging a battery. During the charging process, the battery is caused to accept and store the desired charging current by producing discharge pulses whose rate and/or durations vary in accordance with the relative magnitudes of the charging current and the acceptance current level of the battery.
Inventors
- 👤 J Mas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:09
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217; H02M7/219; H02J; H02J7/00; H02J7/90; H02J7/927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A battery charger for charging a battery having an opening to the atmosphere comprising a charging current source for delivering current to said battery to be charged, means for periodically discharging said battery while it is being charged from said charging current source, transducer means for measuring the rate of gas evolution within said battery, and means for controlling a continuous increase in the duration of the operation of said battery discharging means during successive operations thereof as the measured rate of gas evolution tends to increase.
Claim 2
Dependent Claim
87 words
A battery charger for charging a battery having an opening to the atmosphere comprising a charging current source for delivering current to said battery to be charged, means for periodically discharging said battery while it is being charged from said charging current source, transducer means for measuring the rate of gas evolution within said battery, and means for controlling a continuous increase in the duration of the operation of said battery discharging means during successive operations thereof as the measured rate of gas evolution tends to increase.
Claim 3
Independent Claim
106 words
A method for charging a battery having an opening to the atmosphere comprising the steps of: a. delivering a charging current to said battery, b. periodically discharging the battery while it is being charged by said charging current, c. measuring the rate of gas evolution within the battery, and d. controlling a continuous increase in the rate of the discharge of the battery as the measured rate of gas evolution tends to increase by causing the discharges of the battery in step (b) to occur at a fixed rate and the durations of the discharges in successive cycles to increase as the battery is progressively charged.
Claim 4
Independent Claim
106 words
A method for charging a battery having an opening to the atmosphere comprising the steps of: a. delivering a charging current to said battery, b. periodically discharging the battery while it is being charged by said charging current, c. measuring the rate of gas evolution within the battery, and d. controlling a continuous increase in the rate of the discharge of the battery as the measured rate of gas evolution tends to increase by causing the discharges of the battery in step (b) to occur at a fixed rate and the durations of the discharges in successive cycles to increase as the battery is progressively charged.
References Cited (Backward Citations)
US3123758A
Cited
US2503179A
Cited
US3175146A
Cited
US3460019A
Cited
US3517293A
Cited
US3559025A
Cited
US3614583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |