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Study on SOC Estimation Method for LiFePO4 Battery at Variable Temperature
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Zhanlong XIAO1, Yuejiu ZHENG1, Xiangjun LI2, Wentao JIN2, Xiangjin WANG3, Yuhan MA3
Journal of Power Supply | 2024, 22(6) : 199 - 206
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Journal of Power Supply | 2024, 22(6): 199-206
Battery and Energy Storage
Study on SOC Estimation Method for LiFePO4 Battery at Variable Temperature
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Zhanlong XIAO1, Yuejiu ZHENG1, Xiangjun LI2, Wentao JIN2, Xiangjin WANG3, Yuhan MA3
Affiliations
  • 1 College of Mechanical Engineering University of Shanghai for Science and Technology Shanghai 200093 China
  • 2 China Electric Power Research Institute Beijing 100192 China
  • 3 Electric Power Research Institute State Grid Zhejiang Electric Power Co., Ltd Hangzhou 310014 China
Published: 2024-11-30 doi: 10.13234/j.issn.2095-2805.2024.6.199
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In the actual operation of a battery, its temperature will vary with the ambient temperature, which undoubtedly increases the difficulty in estimating its state-of-charge (SOC). To address this problem, the relationship of temperature with the charge and discharge capacities, internal resistance and open circuit voltage of the battery is studied, and an equivalent circuit model considering temperature is established accordingly. The battery SOC is estimated based on this model by combining the extended Kalman filter algorithm, which can update the temperature-dependent variables in real time and adapt to the temperature change of the battery. In addition, this method is validated at variable temperatures. Results show that the proposed method can quickly and accurately estimate the battery SOC with an estimation error within 2%.

Ambient temperature  /  LiFePO4 battery  /  state-of-charge (SOC) estimation  /  extended Kalman filter
Zhanlong XIAO, Yuejiu ZHENG, Xiangjun LI, Wentao JIN, Xiangjin WANG, Yuhan MA. Study on SOC Estimation Method for LiFePO4 Battery at Variable Temperature[J]. Journal of Power Supply, 2024 , 22 (6) : 199 -206 . DOI: 10.13234/j.issn.2095-2805.2024.6.199
  • Science and Technology Project of State Grid Corporation of China(5400-201955488A)
Year 2024 volume 22 Issue 6
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.6.199
  • Receive Date:2021-12-01
  • Online Date:2025-07-19
  • Published:2024-11-30
Article Data
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History
  • Received:2021-12-01
  • Revised:2022-01-13
  • Accepted:2022-01-22
Funding
Science and Technology Project of State Grid Corporation of China(5400-201955488A)
Affiliations
    1 College of Mechanical Engineering University of Shanghai for Science and Technology Shanghai 200093 China
    2 China Electric Power Research Institute Beijing 100192 China
    3 Electric Power Research Institute State Grid Zhejiang Electric Power Co., Ltd Hangzhou 310014 China
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表12种不同金属材料的力学参数

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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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