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An improved mini-channel based liquid cooling strategy of prismatic LiFePO4 batteries for electric or hybrid vehicles
Journal of Energy Storage ( IF 9.4 ) Pub Date : 2021-01-21 , DOI: 10.1016/j.est.2021.102301
K. Monika , Chanchal Chakraborty , Sounak Roy , Srikanta Dinda , Satyapaul A. Singh , Santanu Prasad Datta

Li-ion batteries are one of the most widely used energy storage devices owing to their relatively high energy density and power, yet they confront heating issues that lead to electrolyte fire and thermal runaway, especially in automotive applications. A well-designed thermal management system is necessary to mitigate the thermal issues occurring in high charge/discharge conditions. Keeping this in view, an ingeniously designed rectangular mini-channel cold plate is proposed to sandwich in between two consecutive 7Ah prismatic lithium iron phosphate (LiFePO4) batteries with a provision of coolant flow through the mini-channels across the cold plate to form a battery module. A numerical model for the varying channel number, channel width, coolant flow rate, coolant and ambient temperature, etc. to uphold the battery module temperature within the range of 25 °C-40 °C is developed in COMSOL Multiphysics 5.4. A detailed thermodynamic analysis suggests that a cold plate comprising 5 mini channels of width 4 mm with parallel flow design, and water entry near to the charging port with a flow rate of 0.003 kg.s  1 and temperature of 25 °C as the ideal trade-off between heat transfer and pressure drop for better thermal management across the battery module. A uniform heat propagation in longitudinal direction justifies the optimum design of the cold plate.



中文翻译:

改进的基于微型通道的电动或混合动力汽车棱形LiFePO 4电池液体冷却策略

锂离子电池由于其相对较高的能量密度和功率而成为使用最广泛的能量存储设备之一,但它们面临着导致电解质着火和热失控的加热问题,尤其是在汽车应用中。一个精心设计的热管理系统对于减轻高充放电条件下发生的热问题是必不可少的。考虑到这一点,提出了一种巧妙设计的矩形微型通道冷板,将其夹在两个连续的7Ah棱柱形磷酸铁锂(LiFePO 4)装有冷却剂的电池通过冷却板中的微型通道流动,从而形成电池模块。在COMSOL Multiphysics 5.4中开发了一个用于改变通道数,通道宽度,冷却液流速,冷却液和环境温度等的数值模型,以将电池模块的温度维持在25°C至40°C的范围内。详细的热力学分析表明,一个冷板包括5个宽度为4 mm的微型通道,采用平行流设计,水以0.003 kg的流量进入装料口附近。s   125°C的温度是传热和压降之间的理想折衷,可以更好地管理整个电池模块的热量。沿纵向的均匀热量传播证明了冷板的最佳设计。

更新日期:2021-01-22
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