Method and apparatus for regulating state of charge in...

Details Method and apparatus for regulating state of charge in... Method and apparatus for regulating state of charge in...

2006-08-15

2006-08-15

Tibbits, Pia (Department: 2838)

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

Having variable number of cells or batteries in series

Reexamination Certificate

active

07091696

ABSTRACT:
A method and an apparatus for regulating state of charge in a battery assembly in which respective voltages across unit cells can be equalized in a short time. Among a plurality of unit cells B1to B4. . . Bn, the unit cell having the largest voltage across the cell is referred to as the largest unit cell, and the unit cell having the smallest voltage across the cell is referred to as the smallest unit cell. Electric charge is transferred from the largest unit cell to a capacitor CBso that the voltage across the capacitor CBmay be made higher than the voltage across the largest unit cell. Thereafter, the electric charge is transferred from the capacitor CBto the smallest unit cell thereby to equalize the voltages across the unit cells.

REFERENCES:
patent: 5956241 (1999-09-01), LoCascio
patent: 5982143 (1999-11-01), Stuart
patent: 6459236 (2002-10-01), Kawashima
patent: 6577135 (2003-06-01), Matthews et al.
patent: 6762588 (2004-07-01), Miyazaki et al.
patent: 10-225005 (1998-08-01), None

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