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Patent Searching and Data


Title:
POWER STORAGE SYSTEM AND METHOD FOR OPERATING POWER STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/026058
Kind Code:
A1
Abstract:
Provided are: a power storage system that has excellent characteristics, that is highly safe, and that is less likely to deteriorate; and a storage battery with excellent characteristics. This power storage system is configured such that: a first circuit having a function of detecting secondary battery and the voltage of the secondary battery, and a function of charging the secondary battery is provided; a potential curve during discharging of the secondary battery has two or more flat portions; and the system includes a first step for discharging the secondary battery, a second step for detecting the reduced capacity of the secondary battery, and a third step for starting charging of the secondary battery, and a fourth step for ending the charging of the secondary battery. The reduced capacity is detected in the second step through detection of an inflection point of the potential curve, and the inflection point is located between the first and second flat portions of the potential curve.

Inventors:
MIKAMI MAYUMI (JP)
KURIKI KAZUTAKA (JP)
TAJIMA RYOTA (JP)
OCHIAI TERUAKI (JP)
NARITA KAZUHEI (JP)
TAKAHASHI MINORU
Application Number:
PCT/IB2019/056089
Publication Date:
February 06, 2020
Filing Date:
July 17, 2019
Export Citation:
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Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
G01R31/3835; H01M4/505; H01M4/525; H01M4/58; H01M10/48; H02J7/00
Domestic Patent References:
WO2014122776A12014-08-14
Foreign References:
JP2011018547A2011-01-27
JP2011517361A2011-06-02
JP2007250299A2007-09-27
JP2012256550A2012-12-27
KR20130136796A2013-12-13
Other References:
PADHI, A. K. ET AL.: "Phospho-olivines as Positive-Electrode Materials for Rechargeable Lithium Batteries", JOURNAL OF ELECTROCHEMICAL SOCIETY, vol. 144, no. 4, April 1997 (1997-04-01), pages 1188 - 1194, XP002412711, DOI: 10.1149/1.1837571
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