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Title:
APPARATUS AND METHOD FOR ESTIMATING STATE OF CHARGE OF BATTERY ON BASIS OF COULOMB COUNTER
Document Type and Number:
WIPO Patent Application WO/2021/230579
Kind Code:
A1
Abstract:
The present invention relates to an apparatus and a method for estimating the state of charge of a battery, the apparatus and the method being capable of reducing a state of charge estimation error caused by error accumulation in a current detection in the coulomb counter-based estimation of the state of charge of the battery, and increasing the accuracy of a state of charge estimation by compensating for characteristics according to battery temperature and aging. One aspect of the present invention is an apparatus for estimating the state of charge of a battery, comprising: a first coulomb counter (STCC) for calculating a first charge variation (ΔQ) in each period by adding up the battery current (Im) in every predetermined period; a compensator for calculating a second charge variation (ΔQ_comp) by compensating for the first charge variation (ΔQ); a second coulomb counter (CCE) for calculating a first estimated charge amount (Qe) by adding up the second charge variation (ΔQ_comp); and a state of charge estimator for estimating the state of charge of the battery on the basis of the first estimated charge amount (Qe).

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Inventors:
LEE SANG WOO (KR)
KIM DAE SUN (KR)
BAE GI CHUR (KR)
Application Number:
PCT/KR2021/005739
Publication Date:
November 18, 2021
Filing Date:
May 07, 2021
Export Citation:
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Assignee:
SILICON MITUS INC (KR)
International Classes:
G01R31/3832; G01R31/36; G01R31/392
Foreign References:
KR20160110221A2016-09-21
KR100962856B12010-06-09
US20180252775A12018-09-06
US8264203B22012-09-11
US10408887B22019-09-10
Attorney, Agent or Firm:
DARAE LAW & IP, LLC (KR)
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