基于多层膜结构相变材料的动力锂电池被动式均热方法研究  

The study on the multilayer phase change materials for the passive thermal management of the power batteries

作　　者：陈梦婷 沙盈吟 陈兴际 邓业林 CHEN Mengting;SHA Yingyin;CHEN Xingji;DENG Yelin(School of Rail Transit,Soochow University,Suzhou 215131,China)

机构地区：[1]苏州大学轨道交通学院,江苏苏州215131

出　　处：《技术与市场》2023年第1期1-7,共7页Technology and Market

基　　金：江苏省大学生创新创业训练计划项目(202010285117Y);国家自然科学基金(51905361)。

摘　　要：由于单一层相变材料与电池直接接触不紧密削弱了传热效果,积聚的热量导致电芯温度增加,存在起火安全隐患问题。基于此研究缺陷,拟结合热塑性塑料高密度聚乙烯(HDPE)加热变软从而贴牢相变材料(PCM)与电池的特性,提出“HDPE-PCM-HDPE”的多层膜结构,旨在综合增强传热效果,提升PCM蓄热量利用效率,从而增强动力锂电池安全性。针对一个常见的5电芯系统进行研究,结果表明:在外侧采用PCM:HDPE=4:1的多层结构,中间部分采用PCM:HDPE=3:1的多层结构时,均热效果最优。The direct contact between the single-layer phase change material and the battery weakens the heat transfer effect,and the accumulated heat leads to an increase in the temperature of the battery cell,and there is a problem with fire safety.Based on this flaw,this paper proposes a multi-layer film structure of“HDPE-PCM-HDPE”based on the characteristics of the thermoplastic high-density polyethylene(HDPE),which is heated and softened to adhere to the phase change material(PCM)and the battery.The enhanced heat transfer effect improves the utilization efficiency of PCM heat storage and enhances the safety of power lithium batteries.The study on a common 5-cell system in the electric tools shows that when the multilayer structure of PCM:HDPE=4:1 is used on the outer side,and the multi-layer structure of PCM:HDPE=3:1 is used in the middle part,the heat soaking effect is optimal.

关 键 词：锂电池 被动热管理 相变材料 高密度聚乙烯 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]