Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1992-04-13
1994-02-01
Peckman, Kristine L.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 6, H02J 704
Patent
active
052835120
ABSTRACT:
A battery system comprises a plurality of sodium-sulfur storage cells connected in series to form a battery, with voltage measurement leads attached across each of the individual storage cells. A charge-limiting circuit controllably isolates an individual storage cell from a charging current applied across the battery when the measured voltage across that individual storage cell exceeds a preselected maximum storage cell voltage. Preferably, the charge-limiting circuit includes a bypass circuit connected through the voltage measurement leads and a circuit element that becomes conductive when the voltage across the individual storage cell exceeds the preselected maximum storage cell voltage. There are a plurality of charge-limiting circuits, one for each of the storage cells of the battery. In operation, a high charging current is imposed on the battery while measuring the voltage across each individual storage cell, until the voltage measured across at least one of the storage cells exceeds a preselected reduced-current voltage that is less than the preselected maximum storage cell voltage. The charging current is thereafter reduced to a low charging current while continuing to charge the battery. The low charging current is bypassed around each of the individual storage cells as that storage cell reaches the maximum voltage, until all of the storage cells reach the same state of charge.
REFERENCES:
patent: 3765945 (1973-10-01), Sudworth
patent: 4226923 (1980-10-01), Mikkor
patent: 4238721 (1980-12-01), DeLuca et al.
patent: 4303877 (1981-12-01), Meinhold
patent: 4614905 (1986-09-01), Petersson et al.
patent: 4719401 (1988-01-01), Altmejd
patent: 5063340 (1991-11-01), Kalenowsky
Stadnick Steven J.
Taenaka Robert K.
Denson-Low W. K.
Grunebach Georgann S.
Gudmestad Terje
Hughes Aircraft Company
Peckman Kristine L.
LandOfFree
Charge balancing of batteries during charging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Charge balancing of batteries during charging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge balancing of batteries during charging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-581999