Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1979-02-06
1980-12-09
Hickey, Robert J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 22, 320 39, H02J 708
Patent
active
042387213
ABSTRACT:
A battery charging system capable of equalizing the charge of each individual cell at a selected full charge voltage includes means for regulating charger current to first increase current at a constant rate until a bulk charging level is achieved or until any cell reaches a safe reference voltage. A system controller then begins to decrease the charging rate as long as any cell exceeds the reference voltage until an equalization current level is reached. At this point, the system controller activates a plurality of shunt modules to permit shunting of current around any cell having a voltage exceeding the reference voltage. Leads extending between the battery of cells and shunt modules are time shared to permit alternate shunting of current and voltage monitoring without the voltage drop caused by the shunt current. After each cell has at one time exceeded the reference voltage, the charging current is terminated.
REFERENCES:
patent: 3413536 (1968-11-01), Webb
patent: 3496442 (1970-02-01), Carlisle
patent: 3505584 (1970-04-01), Ford et al.
Berman Baruch
DeLuca William H.
Gelb George H.
Hornstra, Jr Fred
Moede Larry W.
Denny James E.
Glenn Hugh W.
Hickey Robert J.
Jackson Frank H.
The United States of America as represented by the United States
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