Circuit for detecting remaining battery capacity

Details Circuit for detecting remaining battery capacity Circuit for detecting remaining battery capacity

2007-02-12

2011-12-13

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S149000, C324S428000

Reexamination Certificate

active

08076904

ABSTRACT:
A disclosed circuit for detecting remaining battery capacity includes: a current detection unit detecting a charge and discharge current of a battery; a remaining capacity measurement unit measuring remaining capacity of the battery by integrating the charge and discharge current at first time intervals when the charge and discharge current detected in the current detection unit is not more than a predetermined value and at second time intervals shorter than the first time intervals when the charge and discharge current exceeds the predetermined value; and an interrupt signal generation unit generating an interrupt signal when the charge and discharge current exceeds a reference value and instructing the remaining capacity measurement unit to measure remaining capacity of the battery.

REFERENCES:
patent: 5563496 (1996-10-01), McClure
patent: 5606242 (1997-02-01), Hull et al.
patent: 5774733 (1998-06-01), Nolan et al.
patent: 6025695 (2000-02-01), Friel et al.
patent: 2006/0267552 (2006-11-01), Baer et al.
patent: 10-503882 (1998-06-01), None
patent: 11-283677 (1999-10-01), None
patent: 2001-174534 (2001-06-01), None
Japanese Office Action dated Apr. 19, 2011 relating to JP2007-022197, and its partial English-language translation.

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