Voltage judgment circuit and battery cell pack having the same

Details Voltage judgment circuit and battery cell pack having the same Voltage judgment circuit and battery cell pack having the same

1999-03-10

2000-07-18

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

320162, 327 77, 327 88, H02J 700

Patent

active

06091226&

ABSTRACT:
Disclosed herein is a voltage judgment circuit comprising one or more diodes inserted in the forward direction of a judgment voltage, a current extraction section for extracting a forward current of the diodes, and a comparison section for comparing an output current from the current extracting section with a specified current value to input the comparison results. According to the voltage judgment circuit of the present invention, the discharge after the charging can be prevented to perform the voltage judgment using a low consumption current with high accuracy. A battery cell pack having the above voltage judgment circuits also performs a similar judgment.

REFERENCES:
patent: 4978868 (1990-12-01), Giordano et al.
patent: 5166553 (1992-11-01), Kotera et al.
patent: 5501517 (1996-03-01), Kiuchi
patent: 5731720 (1998-03-01), Suzuki et al.
patent: 5760614 (1995-11-01), Ooishi et al.
patent: 5982147 (1995-11-01), Anderson

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