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Heat transfer in the dynamic cycling of lithium-titanate batteries

机译:钛酸锂电池动态循环中的热传递

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摘要

Based on the coupled model of a three-dimensional thermal model and one-dimensional electrochemical model, the thermal behaviors of lithium-titanate battery under the discharge-charge cycling with various current are investigated. The temperature on the surface of battery increases with the increasing cycling rate. Two temperature peaks are observed during the constant-current discharge, constant-current and constant-voltage charge process based on the analysis of the heat generation. Additionally, the radiative heat transfer cannot be omitted when the battery is operated under natural convection at 0.5 C cycling rate, in this case, the radiative heat transfer is estimated to contribute 42% to the total heat transfer. The results can provide basic data for the thermal management of the battery pack during the discharging and charging processes.
机译:基于三维热模型和一维电化学模型的耦合模型,研究了钛酸锂电池在各种电流下的充放电循环下的热行为。电池表面的温度随着循环速率的增加而增加。根据发热分析,在恒流放电,恒流和恒压充电过程中观察到两个温度峰值。另外,当电池在自然循环下以0.5 C的循环速率运行时,辐射热传递不能被忽略,在这种情况下,辐射热传递估计占总热传递的42%。结果可以为电池组在放电和充电过程中的热管理提供基础数据。

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  • 来源
  • 作者单位

    State Key laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China,CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, PR China;

    State Key laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China;

    State Key laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China;

    State Key laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China;

    State Key laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China;

    Department of Physics & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium-titanate batteries; Heat dissipation; Thermal-electrochemical model; Cycling;

    机译:钛酸锂电池;散热;热电化学模型;循环;

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