Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1976-05-04
1977-08-30
Hickey, Robert J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 2, 320 55, 337 13, H02J 704
Patent
active
040457206
ABSTRACT:
An automatically resetting battery charging circuit in which the temperature of the battery is sensed by a temperature responsive switch to control the charging of the battery between a fast charging rate and a trickle charging rate. Two current paths are provided between a charging current source and one terminal of the battery. The temperature responsive switch is located in one current path (the main or fast charging path) in series with a normally closed relay contact. The relay coil which controls the actuation of the relay and the opening of the relay contact is in the second current path (the trickle charging path) connected across the temperature responsive switch and the relay contact. When the battery temperature exceeds a predetermined value, the temperature responsive switch opens causing charging current to flow through the relay coil. The relay is thus energized, opening the relay contact and keeping the main charging path open irrespective of battery temperature. Thereafter, a trickle current is delivered to the battery through the relay coil. The relay coil is deenergized and the charging circuit automatically reset for subsequent charging by disconnecting the battery or otherwise interrupting current flow through the relay coil.
REFERENCES:
patent: 3601679 (1971-08-01), Braun
patent: 3928792 (1975-12-01), Mullersman
patent: 3935525 (1976-01-01), Elson et al.
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