Title:
STORAGE CELL CHARGE/DISCHARGE CURVE ESTIMATION DEVICE AND CHARGE/DISCHARGE CURVE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/240270
Kind Code:
A1
Abstract:
The charge/discharge curve estimation device according to the present invention derives an approximation curve for an initial impedance function and an initial open-end voltage function as an initial correction object and sets the approximation curve as an advance estimation function. After the start of charging/discharging, a measurement unit measures a charge/discharge voltage and charge/discharge current in a fixed time period. An SOC calculation unit calculates an SOC value simultaneously with measurement of the charge/discharge voltage. An estimation computational processing unit determines the estimation error between the actual measured voltage and the advance estimate voltage determined from the advance estimation function, determines a post-estimation value through use of a correction formula which uses a Gaussian function having as terms the calculated estimation error, a learning rate LR set in advance for the current value, and a correction width σ, corrects the advance estimation function on the basis of the calculated post-estimation value, sets a new advance estimation function, and estimates a charge/discharge curve.
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Inventors:
ARIMA MASAHITO (JP)
ONIKI NAOKI (JP)
ONIKI NAOKI (JP)
Application Number:
PCT/JP2019/023712
Publication Date:
December 19, 2019
Filing Date:
June 14, 2019
Export Citation:
Assignee:
DAIWA CAN CO LTD (JP)
International Classes:
G01R31/387; H01M10/42; H01M10/48; H02J7/00
Domestic Patent References:
| WO2019117198A1 | 2019-06-20 |
Foreign References:
| JP2017220293A | 2017-12-14 | |||
| JP2016090346A | 2016-05-23 | |||
| JP2015135286A | 2015-07-27 |
Other References:
"An examination about economic efficiency estimation model of lithium-ion batteries", vol. 39, no. 3, 8 August 2019 (2019-08-08), pages 11 - 20, Retrieved from the Internet
ARIMA, MASAHITO ET AL.: "A method of the degradation diagnosis by the using state of lithium-ion battery modules", IEICE TECHNICAL REPORT, vol. 118, no. 82, 7 June 2018 (2018-06-07), pages 137 - 142
ARIMA, MASAHITO ET AL.: "Three Degradation Parameters Estimation of a LIB Module Using Single Indicator for In-situ Charge-Discharge Energy Prediction", 2018 IEEE INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE (INTELEC, October 2018 (2018-10-01)
ARIMA, MASAHITO ET AL.: "A method of the degradation diagnosis by the using state of lithium-ion battery modules", IEICE TECHNICAL REPORT, vol. 118, no. 82, 7 June 2018 (2018-06-07), pages 137 - 142
ARIMA, MASAHITO ET AL.: "Three Degradation Parameters Estimation of a LIB Module Using Single Indicator for In-situ Charge-Discharge Energy Prediction", 2018 IEEE INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE (INTELEC, October 2018 (2018-10-01)
Attorney, Agent or Firm:
KURATA, Masatoshi et al. (JP)
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