Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2004-11-12
2009-08-25
Ullah, Akm E (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
C320S132000, C320S136000, C320S162000, C324S427000, C324S433000
Reexamination Certificate
active
07579811
ABSTRACT:
It is aimed at stably implementing a protection function of a secondary battery mainly under software control and providing a battery pack characterized by a reduced circuit installation area, parts costs, and power consumption. An AD converter outputs a voltage value between a positive electrode and a negative electrode of a secondary battery. Based on the voltage value, a microcontroller determines a state of the secondary battery out of overcharge, normal operation, and over-discharge states. According to the determined state, the microcontroller controls operations of a discharge current cutoff means and a charge current cutoff means via a FET driver. When it is determined that the secondary battery is placed in an overcurrent state based on the charge and discharge current size of the secondary battery, an overcurrent detection circuit enables the discharge current cutoff means to be a cutoff state in preference to control by the microcontroller.
REFERENCES:
patent: 5142684 (1992-08-01), Perry et al.
patent: 5167024 (1992-11-01), Smith et al.
patent: 5290643 (1994-03-01), Chen
patent: 5352968 (1994-10-01), Reni et al.
patent: 5565759 (1996-10-01), Dunstan
patent: 5602454 (1997-02-01), Arakawa et al.
patent: 6316914 (2001-11-01), Bertness
patent: 6577883 (2003-06-01), Ueda
patent: 6825639 (2004-11-01), Tashiro et al.
patent: 7095238 (2006-08-01), Steinruecken et al.
patent: 2002/0018329 (2002-02-01), Yoshida
patent: 2002/0036481 (2002-03-01), Nagase
patent: 2002/0050806 (2002-05-01), Fujiwara
patent: 2002/0195996 (2002-12-01), Nakatsuji
patent: 2004/0217739 (2004-11-01), Cummings
patent: 2004/0263123 (2004-12-01), Breen et al.
patent: 0 616 281 (1994-09-01), None
patent: 0 721 247 (1996-07-01), None
patent: 1 065 511 (2001-01-01), None
patent: 1 184 962 (2002-03-01), None
Smith G: “Micro power protection chip for rechargeable lithium-ion batteries” Custom Integrated Circuits Conference, 1996., Proceedings of the IEEE 1996 San Diego, CA, USA May 5-8, 1996, New York, NY, USA, IEEE, US, May 5, 1996, pp. 131-134, XP010167431 ISBN: 0-7803-3117-6.
Koide Toshihiro
Nagashima Osamu
Nakamichi Ryuji
Sato Hideyuki
Tsuchiya Yukio
Frommer William S.
Frommer & Lawrence & Haug LLP
Maxim Japan Co., Ltd.
Presson Thomas F.
Sony Corporation
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