电动汽车用柔性复合相变材料的电池热管理系统  

Battery thermal management system of electric vehicle based on flexible composite phase change material

作　　者：陈友鹏[1] 张国庆[2] 秦启超[1] 覃卓庚[1] 邓坚 李新喜[2] CHEN Youpeng;ZHANG Guoqing;QIN Qichao;QIN Zhuogeng;DENG Jian;LI Xinxi(Guangzhou Nanyang Polytechnic College,Guangzhou 510925,China;Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广州南洋理工职业学院,广州510925 [2]广东工业大学,广州510006

出　　处：《汽车安全与节能学报》2022年第1期168-175,共8页Journal of Automotive Safety and Energy

基　　金：广东省普通高校重点领域专项(智能制造)(2020ZDZX2079);广州市科技计划科学研究计划一般项目(201904010118)。

摘　　要：为了提高电动汽车动力电池系统的热安全性及可靠性,使得动力电池系统维持在正常的工作温度范围之内,该文基于柔性复合相变材料的控温特性,采用熔融共混与有机溶剂挥发相结合的方法,制备由苯乙烯丁二烯苯乙烯嵌段共聚物/石蜡/膨胀石墨(SBS/PA/EG)组成的柔性复合相变材料,并将其与板式热管耦合以显著提高动力电池热管理系统的均温和控温特性。结果表明:柔性复合相变材料(SBS/PA/EG)的导热系数在室温下可提升至0.62 W/(m·K),潜热焓值可达102 J/g。以柔性相变材料耦合板式热管作为电动汽车的电池热管理系统用在电池模组中,当电芯在3 C倍率下放电时,其最高温度控制在42℃之内,电池间温差缩小至1.0℃,显示出优异的控温及均温效果。A novel flexible composite phase change material(PCM)composed of styrene-butadiene-styrene block copolymer/paraffin wax/expanded graphite(SBS/PA/EG)was prepared through melt blending and organic solvent volatilization to improve the thermal safety and reliability of electric vehicle power battery system and to maintain the power battery system within the normal operating temperature range,considering the temperature control characteristics of flexible composite phase change material.The composite PCM was coupled with a plate heat pipe for significantly improving the homogenization temperature and temperature control characteristics of battery thermal management system.The results show that the thermal conductivity of flexible composite phase change material with SBS/PA/EG is increased to 0.62 W/(m∙K)at room temperature,and the latent heat enthalpy reaches 102 J/g.When flexible PCM coupled plate heat pipe as the battery thermal management system of electric vehicles was utilized in the battery module,the maximum temperature can be controlled below 42℃and the temperature difference among batteries maintains within 1.0℃at 3 C discharged rate of batteries,exhibiting excellent temperature control and temperature uniformity effect.

关 键 词：电池热管理系统 柔性复合相变材料 膨胀石墨(EG) 板式热管 

分 类 号：TM911[电气工程—电力电子与电力传动] U469.72[机械工程—车辆工程]