Investigation on thermal performance of water-cooled Li-ion pouch cell and pack at high discharge rate with U-turn type microchannel cold plate
Investigation on thermal performance of water-cooled Li-ion pouch cell and pack at high discharge rate with U-turn type microchannel cold plate
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DOI：
10.1016/j.ijheatmasstransfer.2020.119728
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发表时间：
2020-07
影响因子：
5.2
通讯作者：
M. Patil;J. Seo;S. Panchal;Sang-won Jee;Moo‐Yeon Lee
中科院分区：
文献类型：
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作者：
M. Patil;J. Seo;S. Panchal;Sang-won Jee;Moo‐Yeon Lee
本研究的目的是通过u型微通道冷板对电动汽车用水冷锂离子电池芯和电池组在高放电速率下的热性能进行调查和模拟，并综合考虑不同的放电速率、进口冷却剂质量流量、进口冷却剂温度、通过改变冷却通道数量的表面积覆盖率等参数的影响，提出最佳的冷却策略。通过改变冷却通道的最大宽度和流型布局来调节水力直径。通过实验，提出了简化的产热率计算方法作为数值研究的输入热源。建议采用面积覆盖率为0.750、流道液压直径为1.54 mm的冷板加强电池冷却。建议的单入口、单出口交替交叉流动流型布局比单侧10个进口通道平行流动流型布局最大温度和温差分别降低32.2%和950.1%。研究表明，优化后的冷却参数可以使50 V电池组的最高温度保持在40℃以下，温度不均匀性保持在4℃以下。
The objective of this study involves investigation and simulation on thermal performance of water-cooled lithium-ion battery cell and pack used in electric vehicles at high discharge rate with a U-turn type microchannel cold plate and recommending an optimal cooling strategy by considering the effects of various parameters including different discharge rates, inlet coolant mass flow rates, inlet coolant temperatures, surface area coverage ratios via changing the number of cooling channels, channel hydraulic diameters via changing maximum width of cooling channels, and flow pattern layouts. Experiments were conducted and the simplified heat generation rate calculation method was proposed to use as input heat source in the numerical study. The cold plate with surface area coverage ratio = 0.750 and channel hydraulic diameter = 1.54 mm was suggested to enhance battery cooling. The suggested flow pattern layout corresponding to cross flow with alternate single inlet and single outlet channel decreases the maximum temperature and temperature difference by 32.2% and 950.1%, respectively, when compared to the original flow pattern layout corresponding to parallel flow with 10 inlet channels at one side. The study demonstrated that optimized cooling parameters could maintain the maximum temperature and temperature non-uniformity of 50 V battery pack below 40 °C and 4 °C, respectively.