Battery charger having automatic deep discharge mode

Details Battery charger having automatic deep discharge mode Battery charger having automatic deep discharge mode

1983-09-06

1986-09-02

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 39, 320 48, H02J 700

Patent

active

046098607

ABSTRACT:
A battery charger for recharging nickel cadmium batteries includes trickle charge, fast charge and deep charge modes. A control circuit responsive to the terminal voltage of the battery includes a clock-driven mode control counter having counter states which condition power supply circuitry within the charger to the mode appropriate to the battery terminal voltage. The counter is conditioned to its deep discharge state by actuation of a user-accessible switch. When the terminal voltage falls below a first predetermined level, the counter automatically reverts from the discharge state to its fast charge state to establish the fast charge mode. When the terminal voltage rises above a second predetermined level, the counter automatically reverts to its trickle charge state to establish the trickle charge mode.

REFERENCES:
patent: 3603861 (1971-09-01), Staats et al.
patent: 4270080 (1981-05-01), Kostecki
patent: 4302714 (1981-11-01), Yefsky

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