METHOD AND APPARATUS FOR ESTIMATING STATE OF CHARGE OF LITHIUM ION BATTERY

WIPO Patent Application WO/2016/134496

A1

A method and apparatus for estimating a state of charge of a lithium ion battery. The method comprises the steps of: A. fitting a relationship between an open circuit voltage and a state of charge of a lithium ion battery; B. estimating the state of charge of the lithium ion battery using an observer method; and C. with regard to the state of charge of the lithium ion battery estimated in step B, if it is greater than a predetermined threshold value, estimating the state of charge of the lithium ion battery using the observer method, and if it is less than the predetermined threshold value, estimating the state of charge of the lithium ion battery using an ampere-hour integral method. By means of the method and apparatus for estimating a state of charge of a lithium ion battery in the present invention, defects of an ampere-hour integral method and an observer method can be avoided, and the estimation accuracy in a whole life cycle and a whole state of charge area is improved.

JIANG JIUCHUN (CN)
ZHANG CAIPING (CN)
ZHAO TING (CN)
ZHANG WEIGE (CN)
WANG ZHANGUO (CN)
GONG MINMING (CN)
WU JIAN (CN)
SUN BINGXIANG (CN)
SHI WEI (CN)
LI XUE (CN)
NIU LIYONG (CN)
LI JINGXIN (CN)
HUANG YU (CN)
HUANG QINHE (CN)
BAO YAN (CN)

PCT/CN2015/000124

September 01, 2016

February 28, 2015

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UNIV BEIJING JIAOTONG (CN)

G01R31/36

CN104076293A	2014-10-01
CN103941196A	2014-07-23
CN101813754A	2010-08-25
CN101022178A	2007-08-22
CN103529398A	2014-01-22
CN102930173A	2013-02-13

BEIJING ZHCC INTELECTUAL PROPERTY CO., LTD (CN)
北京众合诚成知识产权代理有限公司 (CN)

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