Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1992-11-25
1994-10-04
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
307 52, H02J 710
Patent
active
053529707
ABSTRACT:
A power resource management system includes a battery charging system (20) that is connected between a positive voltage terminal and a voltage sense terminal (15). An operating system (10), that in one mode operates off of the battery and in a second and charging mode operates off the power source (24), is connected between the positive terminal (12) and the voltage sense node (15). A sense resistor (16) is connected between the voltage sense node (15) and a ground terminal (18). The power source (24) is operable to deliver voltage across the positive terminal (12) and the negative terminal (18). The battery charger (20) includes a charge modulator (24) and a buck regulator which has a switch (26) that is controlled by the controller (34). The controller (34) receives the voltage on the node (15) and controls the switch (26) in accordance with the voltage thereon, which voltage is a function of both the current supplied to the operating system ( 10) and the current supplied to the battery (22) for a charging operation. As the operating system current increases, the charge delivered to the battery decreases and, conversely, as the current to the operating system (10) decreases, the current delivered to a battery (22) increases.
REFERENCES:
patent: 3691448 (1972-09-01), Milward
patent: 3697850 (1972-10-01), Heinrich et al.
patent: 4716353 (1987-12-01), Engelmann
Benchmarq Microelectronics, Inc.
Hickey R. J.
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