18650动力电池组不同布置形式的热特性影响研究  

Study on thermal characteristics of 18650 power battery pack in different arrangement

作　　者：戴海燕 李长玉 张继华 陈立沛 张洵涛 DAI Hai-yan;LI Chang-yu;ZHANG Ji-hua;CHEN Li-pei;ZHANG Xun-tao(College of Automotive and Transportation Engineering,Guangzhou College of South China University of Technology,Guangzhou Guangdong 510800,China)

机构地区：[1]华南理工大学广州学院汽车与交通工程学院,广东广州510800

出　　处：《电源技术》2020年第6期825-827,879,共4页Chinese Journal of Power Sources

基　　金：广东省高校优秀青年创新人才培养计划项目(2016-KQNCX226);广东省特色创新项目(自然科学类)(2017KTSCX218)。

摘　　要：针对不同布置方式的动力电池组,以圆柱锂离子电池为研究对象,建立了18650电池热力学模型,并进行了1C和3C下的放电实验,实验测得的截止电压和表面平均温度随放电容量的变化曲线与仿真结果基本吻合,模型准确.基于该模型,分析了电池间距大小不同、分布方式分别为对齐排列和交叉排列的电池组的电池热特性.结果 表明,间距较大时,散热越好,电池平均温度越低,温差越小;间距相同时,交叉方案的散热优于对齐方案.这为动力电池组的布置和优化设计提供了重要参考.A thermodynamic model of 18650 battery was established for cylindrical lithium-ion power battery pack with different arrangement modes.The discharge experiments were carried out at 1 C and 3 C.The curves of the measured cut-off voltage and surface average temperature changed with the discharge capacity are basically in agreement with the simulation results,and the model is accurate.Based on the model,the thermal characteristics were analyzed in different battery structures with different spacing and distribution modes,which contained alignment and cross arrangement.The results show that the greater the spacing,the better the heat dissipation,the lower the temperature of batteries,and the smaller the temperature difference.When the distance is the same,the heat dissipation of cross arrangement is better than that of alignment arrangement.It provides an important reference for the layout and optimal design of power battery packs.

关 键 词：动力电池组 热特性 散热 仿真 

分 类 号：TM912[电气工程—电力电子与电力传动]