Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1989-11-14
1991-09-03
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 39, 414331, H02J 700
Patent
active
050457691
ABSTRACT:
The present invention is a battery charging system that provides automatic oltage selection, short circuit protection, and delayed output to prevent arcing or pitting. A second embodiment of the invention provides a homing beacon which transmits a signal so that a battery powered mobile robot may home in on and contact the invention to charge its battery. The invention includes electric terminals isolated from one another. One terminal is grounded and the other has a voltage applied to it through a resistor connected to the output of a DC power supply. A voltage scaler is connected between the resistor and the hot terminal. An On/Off controller and a voltage mode selector sense the voltage provided at the output of the voltage scaler. The On/Off controller provides an output whenever V.sub.a <V.sub.H <V.sub.b, where V.sub.a is a reference voltage, V.sub.H is a voltage across the terminals, and V.sub.b is a reference voltage. The voltage mode selector provides an output whenever voltage V.sub.H is less than reference voltage, V.sub.c. An AC power source provides current to the system power supply and to a charge supply. The system power supply provides power to the On/Off controller and the voltage mode selector. The outputs of the On/Off controller and voltage mode select are connected to separate control inputs of the charge supply.
REFERENCES:
patent: 3979657 (1976-09-01), Yorksie
patent: 4835453 (1989-05-01), Munningschmidt et al.
Fendelman Harvey
Hickey R. J.
Kagan Michael A.
Keough Thomas Glenn
The United States of America as represented by the Secretary of
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