Battery charging and testing circuit

Details Battery charging and testing circuit Battery charging and testing circuit

H - Electricity

02

J

320/11

H02J 7/10 (2006.01) H02J 7/00 (2006.01)

Patent

CA 1201164

ABSTRACT A constant current battery charging circuit is pro- vided by which the battery receives a full charge until the battery voltage reaches a threshold. When the battery voltage is above the threshold, the battery receives a trickle charge. The actual battery voltage is compared with a reference voltage to determine whether the full charge circuit should be in operation. Hysteresis is pro- vided for preventing a rapid on/off operation around the threshold. The reference voltage is compensated for temperature variations. The hysteresis system and temper- ature compensation system are independent of each other. A separate test circuit is provided for testing the battery voltage. During testing of the battery, the full charge circuit is inoperative.

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