Automatic resetting temperature controlled battery charging system
Patent
·
OSTI ID:7288722
An automatically resetting battery charging circuit is described 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 and causes 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. 2 figures.
- Assignee:
- TIC; ERA-03-010539; EDB-78-016399
- Patent Number(s):
- US 4045720
- OSTI ID:
- 7288722
- Country of Publication:
- United States
- Language:
- English
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