Electricity: battery or capacitor charging or discharging – Battery or cell discharging – Regulated discharging
Patent
1997-05-09
1999-04-27
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
Regulated discharging
324427, 429 92, H02J 700, G01N 27416
Patent
active
058982922
ABSTRACT:
A process for evaluating a remaining capacity of a battery includes the steps of measuring a discharge current and output voltage from the battery during discharging of the battery, calculating a maximum output value of the battery based on a characteristic of the variation in discharge current and output voltage determined from the measured values of the discharge current and output voltage, and evaluating the remaining capacity of the battery based on the calculated maximum output value. The evaluation of the remaining capacity of the battery by this process is prohibited in a sudden-load-varying state in which the variation in load of the battery during discharging of the battery exceeds a predetermined limit level. Thus, it is possible to properly evaluate the remaining capacity of the battery without obtaining or using unstable voltage information of the battery immediately after the load varies suddenly, thereby leading to an enhanced accuracy of evaluation of the remaining capacity.
REFERENCES:
patent: 5635842 (1997-06-01), Yokoo et al.
patent: 5703469 (1997-12-01), Kinoshita
patent: 5744931 (1998-04-01), Arai et al.
patent: 5789923 (1998-08-01), Shimoyama et al.
patent: 5793211 (1998-08-01), Shimoyama
Takemoto Hideharu
Umeyama Hiroya
Watanabe Kenji
Honda Giken Kogyo Kabushiki Kaisha
Toatley , Jr. Gregory J.
Wong Peter S.
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