液冷管道对动力锂电池组温度场影响研究  

Investigation on temperature field performance for lithium-ion batteries by liquid-cooled tubes

作　　者：安治国[1] 丁玉章 刘奇[1] 癿建建 AN Zhi-guo;DING Yu-zhang;LIU Qi;QIE Jian-jian(School of Mechanotronics ＆ Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074.Chin)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074

出　　处：《电源技术》2018年第6期795-798,共4页Chinese Journal of Power Sources

摘　　要：锂电池被广泛用于电动汽车来代替传统能源,但由于锂电池适宜工作最高温度为50℃,所以有效控制电池组温度对于电动汽车设计尤为重要。建立了液冷散热锂离子电池组有限元模型。对不同流道数量的电池组进行仿真,可知增加流道数量能够降低电池组最高温度;分别对相同截面积的圆形和矩形流道电池组进行放电过程热仿真,可知采用矩形流道能比圆形流道更能有效降低最高温度,但同时会提高电池组内最大温差;对不同长宽比的矩形截面流道电池组进行仿真,可知增大流道截面长宽比,能有效降低电池组的最大温度,但过量增大截面长宽比会提高电池组内温差,使电池组的均温性能下降。Lithium-ion batteries are widely used for electric vehicles to replace conventional energy. Because lithium-ion batteries appropriate temperature is 50 ℃, it is very important for electric vehicle design to manage the temperature of lithium-ion batteries. Finite element model of liquid-cooled lithium-ion batteries was established. The simulation with different number channels illustrate results that maximum temperature can be decreased by the number increasing of flow passages. Lithium-ion battery discharge thermal simulation was carried out using circular and rectangular channel sectional with the same area, respectively. Rectangular channel is more effective than the circular one to reduce the maximum temperature and the temperature difference between each battery increase with increment of channels. For rectangular channels with different aspect ratios, the maximum temperature of lithium-ion batteries decrease with the increment of sectional aspect ratio. However, excessive increment of sectional aspect ratio leads to the temperature difference rising between each cell, thus cause the average temperature performance degradation.

关 键 词：锂离子电池组 液体冷却 冷板 热分布 

分 类 号：TM912[电气工程—电力电子与电力传动]