Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1988-10-12
1991-05-07
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 37, 320 40, H02J 704
Patent
active
050139924
ABSTRACT:
A battery charger 10 includes a microprocessor device 12 coupled to a voltage to frequency converter 18 for determining a magnitude of a voltage potential appearing across a battery under charge. The microprocessor has an output for activating a source of battery charging power when the determined magnitude of the voltage is within a predetermined range of voltages. During a charge cycle the microprocessor maintains an elapsed time counter and determines if a battery reaches full charge within 30 minutes or does not reach a full charge after 16 hours. In either case the source is deactivated. The microprocessor also determines when a battery reaches a threshold voltage after which the rate of rise of the battery voltage is compared to a predetermined rate of rise. When the measured rate of rise is less than the predetermined rate of rise the microprocessor initiates a final charge cycle wherein the battery is charged for one additional hour. The battery charger includes a display 20 wherein the microprocessor displays the elapsed charge time or the measured battery voltage or a number of codes such as error codes. The battery charger further includes a backup timer 30 which deactivates the source of battery charging power after 16 hours.
REFERENCES:
patent: 4583035 (1986-04-01), Sloan
patent: 4639655 (1987-01-01), Westhaver et al.
patent: 4710694 (1987-12-01), Sutphin et al.
Eavenson Jimmy N.
Pugh Donovan M.
E-Z-Go Division of Textron
Hickey R. J.
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