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<p>Direct cooling technology is regarded as a promising method for battery thermal management owing to its high heat transfer efficiency. However, the overheating problem of the working fluid could affect the performance of the direct cooling system. Additionally, the characteristics of uneven electrochemical reactions and heat generation inside the large-format battery could also affect the performance of this system. This paper establishes an electrochemical-thermal model to investigate the characteristics of heat generation of the large-format blade battery. Two specifically designed direct cooling plate schemes are proposed and tested under the condition of charging at 38&#xa0;°C. The results demonstrate that a significant improvement in temperature homogeneity of large-format battery pack is demonstrated for both of them. Compared to the other one, the scheme with large loop temperature compensation has a better temperature-uniformity performance. This mainly attributes that the one reduces the value of maximum temperature difference from 10.9&#xa0;°C to 4.1&#xa0;°C. In addition, this one shortens the time of SOC from 0 to 100% of the battery pack by about 7 min and reduces the energy consumption of thermal management by 18%. The results serve as robust evidence for the development of efficient direct cooling system designs and help to promote the progress of electric vehicle technology, which correspondingly improves user experience.</p>

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Investigation on High-Temperature-Uniformity Direct Cooling Performance of Battery Pack with Large-Format Blade Battery

  • 期刊论文

  • 发表日期：

    2025年6月21日

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  • Yubo Lian,
  • Heping Ling,
  • Gan Song,
  • He Wang,
  • Bin He,
  • Minggao Ouyang

摘要

Direct cooling technology is regarded as a promising method for battery thermal management owing to its high heat transfer efficiency. However, the overheating problem of the working fluid could affect the performance of the direct cooling system. Additionally, the characteristics of uneven electrochemical reactions and heat generation inside the large-format battery could also affect the performance of this system. This paper establishes an electrochemical-thermal model to investigate the characteristics of heat generation of the large-format blade battery. Two specifically designed direct cooling plate schemes are proposed and tested under the condition of charging at 38 °C. The results demonstrate that a significant improvement in temperature homogeneity of large-format battery pack is demonstrated for both of them. Compared to the other one, the scheme with large loop temperature compensation has a better temperature-uniformity performance. This mainly attributes that the one reduces the value of maximum temperature difference from 10.9 °C to 4.1 °C. In addition, this one shortens the time of SOC from 0 to 100% of the battery pack by about 7 min and reduces the energy consumption of thermal management by 18%. The results serve as robust evidence for the development of efficient direct cooling system designs and help to promote the progress of electric vehicle technology, which correspondingly improves user experience.