为了改善基于复合相变材料控温的电池热管理中复合相变材料热导率低与泄漏率高的问题,制备了一种基于散热片辅助散热的复合相变材料:石蜡(PW)作为相变体,膨胀石墨(EG)和散热片作为导热增强材料,低密度聚乙烯(LDPE)作为定形材料,同时以自制导热硅胶涂覆于锂电池与复合相变材料的接触面。对样品进行材料表征,发现80% PW/15% EG/5% LDPE/散热片复合相变材料具有较好的导热率和较低的泄漏率;充放电实验结果表明,该复合相变材料用于锂离子电池的控温具有良好的效果。
In order to improve the problem of low thermal conductivity and high leakage rate of composite phase change material(PCM) in battery thermal management based on temperature control of composite PCM,a composite PCM based on heat sink assisted heat dissipation was prepared:paraffin wax (PW) as phase changers,expanded graphite (EG) and heat sinks were heat-conducting enhancement materials,and low-density polyethylene (LDPE) was used as the setting material.At the same time,the contact surface of the lithium battery and the composite PCM was coated with a self-made thermal conductive silica gel.And characterized the sample.The test found that the composite PCM with a mass fraction of 80% PW/15% EG/5% LDPE/heat sink had better thermal conductivity and lower leakage rate.And the charge and discharge experiment results shown that the material had a good effect on the temperature control of lithium ion batteries.
[1] Wang Z,Zhang Z,Jia L,et al.Paraffin and paraffin/aluminum foam composite phase change material heat storage experimental study based on thermal management of Li-ion battery[J].2015,78:428-436.
[2] Wang Y,Ding Y,Wu H.Performance of paraffin/carbon nanotube composite phase change material[J].Modern Chemical Industry,2015,35(1):130-134.
[3] Barboura S,Meddour J,Haboussi M,et al.Predicting mechanical and thermal behavior of multiphase composite containing phase change material (PCM) by micromechanical approaches[J].Applied Mechanics & Materials,2015,798:430-434.
[4] 赖艳华,吴涛,魏露露,等.基于相变材料的电子元件的散热性能[J].化工学报,2014,65(S1):157-161.
[5] 管学茂,孙倩,朱建平,等.石蜡基相变材料导热性和液相渗漏研究进展[J].化工新型材料,2013,41(1):146-148.
[6] 吴淑英,童旋,龚曙光,等.纳米石墨烯片/石蜡复合相变蓄热材料的热性质研究[J].化工新型材料,2014(7):105-107.
[7] 王元明,丁云飞,吴会军.石蜡/碳纳米管复合相变材料的性能研究[J].现代化工,2015,35(1):130-134.
[8] 夏莉,张鹏,周圆,等.石蜡与石蜡/膨胀石墨复合材料充/放热性能研究[J].太阳能学报,2010(5):610-614.
[9] Lin S C,Al-Kayiem H H.Thermal reliability of paraffin wax phase change material for thermal energy storage[J].Applied Mechanics and Materials,2015,699(2015):263-268.
[10] 杨序平,刘菁伟,杨文彬,等.导热填料对HDPE/石蜡定形相变材料性能的影响[J].西南科技大学学报,2014(2):10-13.
[11] 刘臣臻,张国庆,王子缘,等.膨胀石墨/石蜡复合材料的制备及其在动力电池热管理系统中的散热特性[J].新能源进展,2014(3):233-238.
[12] Ren X,Shen H,Yang Y,et al.Study on the properties of a novel shape-stable epoxy resin sealedexpanded graphite/paraffin composite PCM and itsapplication in buildings[J].Phase Transitions,2019,92(4):1-14.
[13] 叶喜葱,肖克强,曹如心,等.石墨含量对石墨/铝基自润滑复合材料摩擦性能的影响[J].材料热处理学报,2018,39(6):1-6.
[14] 叶芬,成昊,张小娜,等.封装PCM/蜂窝陶瓷复合蓄热模型设计及数值模拟研究[J].中国陶瓷,2019(5):14-19.
[15] 何彬,李响.一种新型组合蜂窝结构的轴向承载性能研究[J].机械强度,2016,(2):328-332.
[16] Akopyan T K,Padalko A G,Belov N A,et al.Effect of Barothermal treatment on the structure and the mechanical properties of a high-strength eutectic Al-Zn-Mg-Cu-Ni aluminum alloy[J].Russian Metallurgy (Metally),2017(11):922-927.
[17] 梁伟,刘振祺,麦汉超,等.基于辐射和传导耦合的蜂窝夹芯结构传热性能分析[J].强度与环境,2008(4):31-36.
[18] Omari S A B A,Ghazal A M,Elnajjar E.A novel concept to enhance the applicability of solid gallium as phase change material for heat sinks by integrating within it discretely distributed chunks of un-encapsulated PCM[J].International Communications in Heat & Mass Transfer,2018,91(2):274-281.
[19] Arshad A,Ali H M,Ali M,et al.Thermal performance of phase change material (PCM) based pin-finned heat sinks for electronics devices:effect of pin thickness and PCM volume fraction[J].Applied Thermal Engineering,2017,112:143-155.
[20] 丁鹏,黄斯铭,钱佳佳,等.石蜡和石墨复合相变材料的导热性能研究[J].华南师范大学学报(自然科学版),2010(2):59-62,81.
基金资助
国家自然科学基金(51762034);江西省自然科学基金(20181BAB206032)
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