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Study on the Homogeneity of Large-Size Blade Lithium-Ion Batteries Based on Thermoelectric Coupling Model Simulation

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  • Fei Chen

    (College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
    State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China)

  • Wenkuan Zhu

    (College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Xiangdong Kong

    (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

  • Yunfeng Huang

    (College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Yu Wang

    (College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
    State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China)

  • Yuejiu Zheng

    (College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

  • Dongsheng Ren

    (State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
    Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

Abstract

To improve the energy density of lithium-ion battery packs, lithium-ion batteries are gradually advancing towards large-size structures, which has become one of the dominant development trends in the battery industry. With large-size blade lithium-ion batteries as the research object, this paper develops a high-precision electro-thermal coupling model based on the relevant parameters obtained through basic performance experiments, explores the mechanism of battery inhomogeneity from a simulation perspective, and further proposes a design management method. First of all, the optimal intervals of capacity and temperature, as well as the characteristics of the inhomogeneity distribution for large-size cells, are determined by essential performance and inhomogeneity tests; subsequently, the electrochemical and thermal characteristics of the large-size battery are described precisely through a 3D thermoelectric coupling mechanism model, and the inhomogeneity of the temperature distribution is obtained through simulation; eventually, the optimized cell connection method and thermal management strategy are proposed based on the validated model. As indicated by the findings, the above solutions effectively ease the inhomogeneity of large-size cells and significantly boost the performance of large-size cells under different operating conditions.

Suggested Citation

  • Fei Chen & Wenkuan Zhu & Xiangdong Kong & Yunfeng Huang & Yu Wang & Yuejiu Zheng & Dongsheng Ren, 2022. "Study on the Homogeneity of Large-Size Blade Lithium-Ion Batteries Based on Thermoelectric Coupling Model Simulation," Energies, MDPI, vol. 15(24), pages 1-19, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9556-:d:1005690
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    References listed on IDEAS

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    1. Dai, Haifeng & Yu, Chenchen & Wei, Xuezhe & Sun, Zechang, 2017. "State of charge estimation for lithium-ion pouch batteries based on stress measurement," Energy, Elsevier, vol. 129(C), pages 16-27.
    2. Feng, Xuning & Weng, Caihao & Ouyang, Minggao & Sun, Jing, 2016. "Online internal short circuit detection for a large format lithium ion battery," Applied Energy, Elsevier, vol. 161(C), pages 168-180.
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