Electricity: battery or capacitor charging or discharging – Battery or cell charging – Pulsed
Reexamination Certificate
2011-08-02
2011-08-02
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
Pulsed
C320S132000, C320S137000, C320S152000, C320S157000
Reexamination Certificate
active
07990111
ABSTRACT:
In a proposed apparatus and method, constant-voltage charge is performed with an in-vehicle secondary battery immediately after start of a vehicle or during running of the vehicle. A quantity relevant to polarization caused in the battery immediately after start of the constant-voltage charge is calculated using data of the charge current. It is determined whether or not a change rate of the calculated polarization-relevant quantity is less than a given threshold. When the change rate is less than the given threshold, a plurality of data of the charge current sampled and held during a predetermined period of time are acquired. A value of the charge current to be accumulated until the charge current reaches a given final value is calculated using the plurality of data of the charge current. The internal electric state of the battery is estimated based on the accumulated value of the charge current.
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Japanese Office Action dated Nov. 2, 2009, issued in corresponding Japanese Application No. 2007-301708, with English translation.
Mizuno Satoru
Ono Hiroaki
Tomura Masayuki
Denso Corporation
Nippon Soken Inc.
Nixon & Vanderhye PC
Omar Ahmed
Tso Edward
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