Battery charging state arithmetic operation device for...

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging

Reexamination Certificate

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Reexamination Certificate

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10538268

ABSTRACT:
In order to provide a battery charging state arithmetic operation device which can judge a charging state of a battery currently being used easily and in a short time, there are provided battery voltage calculation means6with specified load for calculating a first and a second battery voltages when a battery current is at a specified load current value from a first I-V characteristic of the battery which is in a first state as a currently used state and is stored in first I-V characteristic storage means3and a second I-V characteristic which is in a second state where the amount of remaining energy is small and is stored in second I-V characteristic storage means4, and SOC arithmetic operation means7for calculating an SOC (charging state) of the battery in the first state by using the first and the second battery voltages calculated.

REFERENCES:
patent: 5539318 (1996-07-01), Sasaki
patent: 5650712 (1997-07-01), Kawai et al.
patent: 4-115084 (1992-10-01), None
patent: 6-34727 (1994-02-01), None
patent: 6-59003 (1994-03-01), None
patent: 2000-67932 (2000-03-01), None
Microfilm of the Specification and Drawings Annexed to the Request of Japanese Utility Model Application, No. 18430/1991, (Laid-open No. 115084/1992), (Kyushu Denki Seizo Kabushiki Kaisha), Oct. 12, 1992.

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