Battery capacity detection apparatus and detection method

Details Battery capacity detection apparatus and detection method Battery capacity detection apparatus and detection method

2007-06-26

2007-06-26

Easthom, Karl (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

Reexamination Certificate

active

10873030

ABSTRACT:
A detection device and method for accurately detecting the battery capacity remaining in the device independent of the operating mode of the device. When the battery-powered device is operating in a low load mode, the battery discharge voltage is A/D converted and the remaining battery capacity is determined based on the resulting digital signal. When the battery-powered device is operating in a high load mode, the battery discharge voltage is compared with specific threshold voltages, and an interrupt process is run based on the comparison result to calculate the remaining battery capacity.

REFERENCES:
patent: 4219999 (1980-09-01), Ichikawa et al.
patent: 5136246 (1992-08-01), Sakamoto
patent: 5640081 (1997-06-01), Austin et al.
patent: 2002/0060553 (2002-05-01), Kato
patent: 07-325134 (1995-12-01), None
patent: 2002-228731 (2002-08-01), None
patent: 2003-031268 (2003-01-01), None
3-page EPO Form 1507.0 European Search Report which issued in application No. EP 04 01 3630 citing the above 2 references.

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