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Patent Searching and Data


Title:
METHOD FOR ESTIMATING STATE OF CHARGE OF POWER STORAGE DEVICE AND SYSTEM FOR ESTIMATING STATE OF CHARGE OF POWER STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/193471
Kind Code:
A1
Abstract:
Provided is a method for estimating, with a high level of estimation accuracy, the state of charge (SOC) of a secondary battery, even if degradation of the secondary battery has progressed. Also provided is a capacity measurement system for a secondary battery, wherein the system estimates the SOC with high accuracy in a short amount of time and at a low cost. A neural network is used to further increase the accuracy of the SOC estimation obtained through computational processing via a regression model, such as a Kalman filter. The SOC can be estimated with high accuracy by using initial parameters that use a neural network in which the parameters serve as teaching data obtained with an optimization algorithm.

Inventors:
ISA, Toshiyuki (398, Hase, Atsugi-sh, Kanagawa 36, 〒2430036, JP)
CHIDA, Akihiro (398, Hase, Atsugi-sh, Kanagawa 36, 〒2430036, JP)
Application Number:
IB2019/052581
Publication Date:
October 10, 2019
Filing Date:
March 29, 2019
Export Citation:
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Assignee:
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. (398 Hase, Atsugi-shi Kanagawa, 36, 〒2430036, JP)
International Classes:
G01R31/367; H01M10/48; H02J7/00
Domestic Patent References:
WO2016031191A12016-03-03
Foreign References:
CN105487016A2016-04-13
JP2018159624A2018-10-11
Other References:
NATORI, KOHEI ET AL.: "Initial Parameter Value Estimatation Using the Frequency Response for State-of-charge Estimation of Lithium-ion Battery", TRANSACTIONS OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS, vol. 53, no. 1, 31 July 2017 (2017-07-31), pages 112 - 120
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