摘要
锂离子电池的可靠性、性能和寿命受工作温度的影响很大,为了保持良好的工作温度条件,基于蛇形微通道冷板设计了一种新的圆柱电池液体冷却热管理系统。研究了通道与冷却板的高度比,入口质量流速和流动方向对电池组冷却性能的影响。CFD分析结果表明,在不同的通道高度比下,电池组的最高温度和温度差的变化相对较小,而在不同的入口质量流量和流动方向下,电池组的最高温度和温度差异的变化较大。随着通道与冷却板的高度比和入口质量流量的增加,压降的趋势分别增大和减小。入口质量流量为12×10^-4 kg/s时最优模型的最高温度和最大温差分别降低7.449℃(18.22%)和9.064℃(87.66%)。
The reliability,performance and lifetime of the lithium-ion battery are greatly affected by the operating temperature.To maintain a good working temperature condition,a new liquid-cooling thermal management system for cylindrical battery is designed based on serpentine microchannel cold plate.The effects of the height ratio of channel to cooling plate,inlet mass flow rate and flow direction on the cooling performance of battery pack are studied.The CFD results show that the variations of the maximum temperature and the temperature difference of the battery pack are relatively small under different height ratios of channel,while variations and difference are big under different inlet mass flow rates and flow directions.With the increase of the height ratio of channel to cooling plate and inlet mass flow rate,the trends of pressure drop are increasing and decreasing respectively.The maximum temperature and the maximum temperature difference of the optimum model when the inlet mass flow rate is 12×10^-4 kg/s are reduced by 7.449℃(18.22%)and by 9.064℃(87.66%)respectively.
作者
谢忱创
Xie Chenchuang(School of Mechatronics&Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074)
出处
《汽车文摘》
2020年第12期31-38,共8页
Automotive Digest
关键词
电池热管理
蛇形液体冷却板
最高温度
最大温差
压力损失
Battery thermal management
Snakelike liquid cooling plate
Local temperature difference
Maximum temperature Pressure loss
