STATE OF CHARGE DETECTION DEVICE

WIPO Patent Application WO/2013/114669

A1

The present invention pertains to the detection of the state of charge of a battery, whereby the complex impedance in the diffusion region of the battery is used. An arithmetic device such as a computer determines the slope of the complex impedance at at least two different frequencies in the diffusion region of a rechargeable battery when a straight-line approximation has been made. The state of charge of the rechargeable battery is detected by using the slope that has been determined, and the relationship between the state of charge and slopes that have been stored in advance in a storage means.

JP2017150975	HIGH-RATE DETERIORATION INDEX ESTIMATION CONTROLLER
JPS6287878	BATTERY CONSUMPTION DETECTOR
JP3966810	APPARATUS AND METHOD FOR DETERMINING FULL CHARGE OF STORAGE BATTERY, AND APPARATUS AND METHOD FOR ESTIMATING REMAINING CAPACITY OF STORAGE BATTERY

KOBA DAISUKE (JP)
TAKEDA YUKIHIRO (JP)
MAEGAWA KATSUNORI (JP)
OSAKA TETSUYA (JP)

PCT/JP2012/074722

August 08, 2013

September 26, 2012

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PRIMEARTH EV ENERGY CO LTD (JP)

G01R31/36; H01M10/48; H02J7/00; B60L3/00

JP2011158444A	2011-08-18
JPH05135806A	1993-06-01
JPS60144675A	1985-07-31
JPS60144675A	1985-07-31
JP2000299137A	2000-10-24

KURIYAMA, N. ET AL., J ALLOY & COMPD., vol. 202, 1993, pages 183
ZHANG, W. ET AL., ELECTROCHEM. SOC. THE 185TH MEET., 1994
See also references of EP 2811310A4

YKI Patent Attorneys (JP)
Patent business corporation YKI international patent firm (JP)

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