Battery charger detecting full charge of batteries using a therm

Details Battery charger detecting full charge of batteries using a therm Battery charger detecting full charge of batteries using a therm

1997-03-27

1999-06-01

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

For diverse sizes of cells, batteries, or battery packs

320150, H01M 1046

Patent

active

059091010

ABSTRACT:
A battery charging system is disclosed for charging two different types of battery packs, a known three terminal type including batteries and a thermostat switch, and a newer four terminal type further including a thermistor for sensing battery temperature. A charging control circuit stops charging current to the battery pack when a contact of the thermostat switch is open or when the thermistor detects a temperature above a predetermined temperature. If either the thermostat switch or the thermistor fail to properly operate, charging current to the battery pack is stopped securely to avoid damaging batteries.

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