Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1989-04-10
1990-12-11
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 23, 320 39, H02J 710
Patent
active
049773640
ABSTRACT:
A resistance free constant voltage taper charger for batteries in which a voltage regulator of a conventional type is combined with a conventional instrumentation amplifier in such a way that the output voltage increases by the same amount as a reference voltage coupled to the input of the amplifier is varied. The result will be that the voltage at the final output is constant.
The same basic circuit can be complemented with two switches and with a sample and hold circuit controlled by a pulse generator so that in short pulse periods the voltage regulator is disabled and the resistance free electrochemical battery voltage is samples, and during the longer intervals between the periods the sampled and stored value is used to regulate the output voltage so that the electrochemical voltage remains unchanged.
REFERENCES:
patent: 3531706 (1970-09-01), Mullersman
patent: 4131841 (1978-12-01), Bennefeld
patent: 4392101 (1983-07-01), Saar et al.
patent: 4684871 (1987-08-01), Plagge
patent: 4785226 (1988-11-01), Fujisawa et al.
Kordesch Karl
Ujj Ronald
Battery Technologies Inc.
Hewson Donald E.
Hickey R. J.
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