Method and device for detecting a state of charge of a battery a

Details Method and device for detecting a state of charge of a battery a Method and device for detecting a state of charge of a battery a

1998-10-07

2000-08-15

Berhane, Adolf Deneke

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320130, H02J 700

Patent

active

061041661

ABSTRACT:
Variation of the charged amount among battery blocks composing a battery assembly is detected. By subtracting the detected value of the variation from the width between the upper limit value and the lower limit value of the charged amount, the movable range of the charged amount is found. The position of the present charged amount is detected as the state of charge. For example, it is arranged that both ends of the movable range are 0% and 100%, and that the movable range is the full scale. Then, the position of the charged amount on this scale is specified by the ratio %. The detection of the state of charge in which the variation in charged amount and the change of the movable range are considered, is performed, and on the basis of this state of charge, a preferable charge and discharge control is performed.

REFERENCES:
patent: 5387857 (1995-02-01), Honda et al.
patent: 5539318 (1996-07-01), Sasaki
patent: 5650712 (1997-07-01), Kawai et al.
patent: 5786640 (1998-07-01), Sakai et al.

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