Non-dissipative battery charge circuit

Details Non-dissipative battery charge circuit Non-dissipative battery charge circuit

1981-01-16

1983-02-01

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 32, 320 40, H02J 704

Patent

active

043718264

ABSTRACT:
A non-dissipative battery charging circuit utilizing pulse width modulated constant current charging signals and having unregulated charging voltage stepped down by the use of a switching transistor and series inductor is described. Charging current is sensed and fed back to cause control of the charging cycle. Battery voltage is sensed and compared to a reference level for terminating charging when the battery is determined to be fully charged. A clocking and control system responsive to the feedback signals and the sensed voltage levels is described for controlling the activation and duration of application of charging current signals.

REFERENCES:
patent: 3293445 (1966-12-01), Levy
patent: 3576487 (1971-04-01), Chase
patent: 3602794 (1971-08-01), Westhaver
patent: 3959707 (1976-05-01), Stephens

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