Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Patent
1995-08-21
1997-12-30
Nguyen, Vinh P.
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
324430, 324433, 320 43, G01N 2746
Patent
active
057034869
ABSTRACT:
A voltage sensor detects a terminal voltage of a battery connected to a load and a current sensor detects a current flowing through the load. A voltage-current changing tendency calculation unit reads a detected voltage and a detected current detected by the voltage sensor and the current sensor and outputs, every predetermined period of time, plural data of the detected voltage and the corresponding detected current as dispersed data. A voltage-current approximating line calculation unit inputs the dispersed data and determines, based on the dispersed data, a voltage-current approximating linear function each time the predetermined period of time. A battery remaining capacity calculation unit determines, each time the voltage-current approximating linear function is determined, a remaining capacity of the battery based on the voltage-current approximating linear function. Particularly the voltage-current approximating line calculation unit determines the voltage-current approximating linear function by applying a method of least squares to the plural data of the voltage and the corresponding current of the dispersed data.
REFERENCES:
patent: 4390841 (1983-06-01), Martin
patent: 4595880 (1986-06-01), Patil
patent: 5539318 (1996-07-01), Sasaki
patent: 5545969 (1996-08-01), Hasegawa
patent: 5592094 (1997-01-01), Ichikawa
Arai Youichi
Kumagai Ryo
O'Toole Brendan
Saigo Tsutomu
Shimoyama Kenichi
Nguyen Vinh P.
Solis Jose M.
Yazaki -Corporation
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