Automatic battery charger with thermal control

Details Automatic battery charger with thermal control Automatic battery charger with thermal control

1983-05-13

1985-04-23

Beha, Jr., William H.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 36, 320 40, 320 48, H02J 700

Patent

active

045132380

ABSTRACT:
There is disclosed herein a battery charger, such as for use with compact low voltage batteries of the type used in consumer electronic products. The charger can sense both voltage and temperature to prevent either an over voltage condition or over temperature condition from damaging the battery being recharged. The charging circuit has fast and slow charge rates, and the circuit oscillates or automatically switches from one rate to the other without requiring the user to manually select or operate a switch for selecting a particular charge rate. The user merely inserts the battery into the charging circuit at a time when it is in the fast mode or slow mode which is indicated by a suitable visual or other indicator device so as to provide a "time selection" of charge rate. The circuit can use a thermal oscillator or an electronic oscillator for switching between the fast and slow rates.

REFERENCES:
patent: 4006397 (1977-02-01), Catotti et al.
patent: 4386308 (1983-05-01), Emile, Jr. et al.
Service Manual, Pub. No. 3746069, Nov. 1977, Vivitar Corporation.

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