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Research on the Method of SOC Estimation for Lithium Battery Based on Thevenin Model and Adaptive Unscented Information Filter
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Weichuan Liu, Fengtao Sun, Kaidong Jiang
Automotive Digest | 2025, (7) : 31 - 36
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Automotive Digest | 2025, (7): 31-36
Special Topic on State of Health (SOH)/State of Charge (SOC) Estimation and Collaborative Management Technology for Power Batteries
Research on the Method of SOC Estimation for Lithium Battery Based on Thevenin Model and Adaptive Unscented Information Filter
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Weichuan Liu, Fengtao Sun, Kaidong Jiang
Affiliations
  • Zhuhai Guangtong Automobile Co., Ltd., Zhuhai 519090
Published: 2025-07-05 doi: 10.19822/j.cnki.1671-6329.20240297
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To enhance the accuracy and reliability of estimating the State Of Charge (SOC) for lithium-ion power batteries, a representative Thevenin model for lithium batteries is selected for study. The modeling and parameter identification methods for this model are elaborated. By analyzing the main limitations of existing SOC estimation techniques, a novel method based on the Thevenin equivalent circuit model combined with an unscented Kalman filter (UKF) is proposed. Verification results demonstrate that this method exhibits good tracking performance, maintains errors within an acceptable range, and delivers overall excellent performance.

Thevenin model  /  Adaptive unscented information filter  /  SOC estimation for lithium battery
Weichuan Liu, Fengtao Sun, Kaidong Jiang. Research on the Method of SOC Estimation for Lithium Battery Based on Thevenin Model and Adaptive Unscented Information Filter[J]. Automotive Digest, 2025 , (7) : 31 -36 . DOI: 10.19822/j.cnki.1671-6329.20240297
Year 2025 volume Issue 7
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doi: 10.19822/j.cnki.1671-6329.20240297
  • Online Date:2025-10-29
  • Published:2025-07-05
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    Zhuhai Guangtong Automobile Co., Ltd., Zhuhai 519090
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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