Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1991-09-10
1993-03-23
Stephan, Steven L.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 32, H02J 704
Patent
active
051967804
ABSTRACT:
An analog, low-cost nickel-cadmium battery charger including a fast charging current circuit and a slow charging current circuit, both of which are controlled by a comparator circuit which compares the characteristic negative change in battery voltage at the onset of overcharge to the stored charging voltage and changes the charging current from fast charging to slow charging when the battery voltage begins to decrease at the onset of overcharge, a timer that shuts off the fast charging current circuit after a predetermined period of time and reverts to the slow charging current circuit, and a thermostat that checks the temperature of the battery and, in the event of overheating or cooling below a predetermined temperature, stops all charging of the battery.
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Nguyen Matthew
Stephan Steven L.
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