Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1986-10-16
1988-05-17
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 32, 320 39, 320 48, 320 20, H02J 700
Patent
active
047453494
ABSTRACT:
This invention is directed to a methjod for charging a rechargeable battery. In this method, the open voltage of the battery is measured and the number of cells estimated. The state of charge of the battery is then tested by supplying a controllably varying charging current to the battery and testing for evolution of gas. If no gas is evolved, the battery is charged until the voltage equals the estimated number of cells multiplied by a voltage which is characteristic of the battery. The foregoing steps are repeated alternately until gas evolution occurs. The true number of cells is then determined and the battery is charged at any charge rate until the voltage equals the true number of cells multiplied by a predetermined voltage. The battery is then charged at that voltage until the charge current decreases to a predetermined low value followed by charging at that predetermined current at any voltage for a predetermined period of time.
REFERENCES:
patent: 3936718 (1976-02-01), Melling et al.
patent: 4396880 (1983-04-01), Windebank
patent: 4639655 (1987-01-01), Westhaver et al.
patent: 4670703 (1987-06-01), Williams
patent: 4677363 (1987-06-01), Kopmann
Chance Ronald R.
Cipris Divna
Mendelson Stuart E.
Palanisamy Thirumalai G.
Allied Corporation
Fuchs Gerhard H,.
Hickey R. J.
Stewart Richard C.
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