Battery pack, battery remaining capacity detection method, and a

Details Battery pack, battery remaining capacity detection method, and a Battery pack, battery remaining capacity detection method, and a

1998-06-11

2000-05-16

Nuzzolillo, Maria

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

324427, 429 91, 429 93, H01M 1044

Patent

active

060641827

ABSTRACT:
A capacity detection method for use with a secondary battery is provided which is capable of accurately detecting capacity by a voltage method by taking into consideration the polarization characteristics of a secondary battery, such as a lithium-ion secondary battery. When the capacity of a secondary battery is to be detected, this capacity detection method uses a voltage method in which the voltage of a secondary battery is measured and the capacity of the secondary battery is computed on the basis of the correlation between the voltage and the capacity of the secondary battery. A voltage and capacity correlation table of the secondary battery is prepared. The voltage of the secondary battery in the correlation table is adjusted by taking the polarization characteristics into consideration, and the capacity of the secondary battery is detected on the basis of the adjusted voltage of the secondary battery. The polarization characteristics are obtained by using a moving average of a current value of the battery.

REFERENCES:
patent: 4876513 (1989-10-01), Brilmyer et al.
patent: 5592094 (1997-01-01), Ichikawa
patent: 5761072 (1998-06-01), Bardsley, Jr. et al.

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