ONLINE STATE OF CHARGE (SOC) ESTIMATION SYSTEM FOR 48V MILD HYBRID VEHICLE LITHIUM ION BATTERY

WIPO Patent Application WO/2021/035500

A1

An online SOC estimation system for a 48V mild hybrid vehicle lithium ion battery, relating to the technical field of hybrid electric vehicle lithium ion batteries. The system comprises two major components. The first component includes an open-circuit voltage characteristic adjustment system and an equivalent circuit model parameter calibration and adjustment system; said two systems can accurately calibrate the values of an open-circuit voltage and the parameters of an equivalent circuit model according to an environment temperature, to reduce a model error caused by temperature variation. The second component is for achieving online SOC estimation and includes a noise statistical characteristic and filter gain adaptive system and a recursive state estimation system; the two systems can improve the robustness and accuracy of online SOC estimation. The system can perform an online SOC estimation with high accuracy and robustness under the typical drive cycle of a mild hybrid vehicle.

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WANG YUAN (SG)
LIN SHUANG (CN)
LENG FENG (SG)
SHAN YINGHUI (CN)
YIN QIUSHI (SG)
LI KAIYUAN (SG)
HE ZHONGJIE (SG)
DONG SHULING (CN)

PCT/CN2019/102657

March 04, 2021

August 27, 2019

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ZIBO TORCH ENERGY CO LTD (CN)
G E Q A R T PTE LTD (SG)

G01R31/36

CN104569835A	2015-04-29
CN106054081A	2016-10-26
CN103675706A	2014-03-26
CN108761340A	2018-11-06
CN107589379A	2018-01-16
CN108594135A	2018-09-28

QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)

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