Method for controlling battery pack

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging

Reexamination Certificate

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Details

C320S116000, C320S136000, C320S148000, C320S162000

Reexamination Certificate

active

07923967

ABSTRACT:
A method controls a battery pack that includes a rechargeable battery, a control circuit that controls charge operation of the battery, and a charge control element that controls the charge current through the control circuit. In the method, even though the control circuit controls the charge control element so that the charge control element turns to OFF, in a case where the charge current is detected, the control circuit determines that abnormality occurs if detecting that the current flows at a rate not less than a first current value during a first detection period, and additionally determines that abnormality occurs if detecting a state the current flows at a rate less than the first current value for a second detection period longer than the first detection period.

REFERENCES:
patent: 6268713 (2001-07-01), Thandiwe
patent: 6873135 (2005-03-01), Nakatsuji
patent: 7436151 (2008-10-01), Wang et al.
patent: 2002/0105305 (2002-08-01), Yagi et al.
patent: 2006/0108982 (2006-05-01), Daou et al.
patent: 56-150921 (1981-11-01), None
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patent: 9-261883 (1997-10-01), None
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patent: 2000-340267 (2000-12-01), None
patent: 2003-337146 (2003-11-01), None
Japanese Office Action issued Mar. 30, 2010 in Application No. 2006-031684.

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