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Effects of air cooling structure on cooling performance enhancement of prismatic lithium-ion battery packs based on coupled electrochemical-thermal model
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2021-05-10 , DOI: 10.1002/ese3.905 Lanchun Zhang 1 , Qian Chen 1 , Tianbo Wang 1
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2021-05-10 , DOI: 10.1002/ese3.905 Lanchun Zhang 1 , Qian Chen 1 , Tianbo Wang 1
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The increasing temperature of lithium-ion batteries during charging and discharging affects its operational performance. The current studies mainly adopt simplified model, less considering the effect of the battery internal electrochemical reaction on the air cooling performance, and the air cooling structure needs to be further optimized. In order to solve the problems above, the coupled electrochemical-thermal air cooling model was established, and the air cooling structure was optimized in terms of the relative position and height of the battery pack inlet and outlet, the distribution, and spacing of cells. The results show the better air cooling performance is achieved when the inlet and outlet are aligned on the same side. When the lateral inlet and outlet aligned on the same side, the lower outlet height is more important for improving the heat dissipation performance of the battery pack, but the worse temperature uniformity emerges. According to the cooling performance of different positions in the battery pack, a method for nonequidistant symmetrical distribution of cells is able to improve the temperature uniformity. The optimal combination of the air cooling structure with various factors is obtained.
中文翻译：
基于电化学-热耦合模型的风冷结构对方形锂离子电池组冷却性能提升的影响
锂离子电池在充放电过程中温度升高会影响其运行性能。目前的研究主要采用简化模型，较少考虑电池内部电化学反应对空冷性能的影响，空冷结构有待进一步优化。为解决上述问题，建立电化学-热耦合空冷模型，从电池组进出风口的相对位置、高度、电芯分布、间距等方面对空冷结构进行优化。结果表明，当入口和出口在同一侧时，可以获得更好的空气冷却性能。当横向进水口和出水口在同一侧时，较低的出口高度对提高电池组的散热性能更重要，但温度均匀性较差。根据电池组中不同位置的冷却性能，采用非等距对称分布的电芯方法可以提高温度的均匀性。得到风冷结构与各种因素的最佳组合。
更新日期：2021-05-10
中文翻译：
基于电化学-热耦合模型的风冷结构对方形锂离子电池组冷却性能提升的影响
锂离子电池在充放电过程中温度升高会影响其运行性能。目前的研究主要采用简化模型，较少考虑电池内部电化学反应对空冷性能的影响，空冷结构有待进一步优化。为解决上述问题，建立电化学-热耦合空冷模型，从电池组进出风口的相对位置、高度、电芯分布、间距等方面对空冷结构进行优化。结果表明，当入口和出口在同一侧时，可以获得更好的空气冷却性能。当横向进水口和出水口在同一侧时，较低的出口高度对提高电池组的散热性能更重要，但温度均匀性较差。根据电池组中不同位置的冷却性能，采用非等距对称分布的电芯方法可以提高温度的均匀性。得到风冷结构与各种因素的最佳组合。
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