Rechargeable batteries and charge control circuit therefore
Abstract
Abstract A dry cell battery system comprising: a sealed battery capable of being repeatedly charged and discharged and including a sealed casing having exposed negative and positive terminals, positive and negative battery plates within said casing and electrically connected respectively to said positive and negative terminals, said negative battery plate having a negative potential in the range of about from minus 0.7 to minus 0.9 volts and an electrolyte within said casing forming with said positive and negative battery plates a rechargeable electro-chemical system which generates substantial quantities of hydrogen during the overdischarging thereof and during the high rate charging thereof at a low temperature, a circuit connected to the battery for operating the battery under one of said conditions which generates substantial quantities of hydrogen; and a porous platinum group metal electrode in said battery which is connected through a low impedance path to said negative terminal for absorbing said substantial quantities of hydrogen.
Inventors
- 👤 H Seiger
- 👤 P Ritterman
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |