摘要
为了确保锂离子电池的安全稳定运行,可靠的电池热管理系统(BTMS)在处理电池热相关问题和确保动力电池的性能、安全以及寿命方面都起着不可或缺的作用。相变材料冷却结构简单、冷却效率高,具有较好的温度平衡性能,而新型纳米材料Mxene的导热系数高达55.8 W/(m·K),因此首次将Mxene和石蜡结合构建复合相变材料(CPCM),在方形锂离子电池组基础上建立了以Mxene/石蜡为CPCM的电池热管理系统,研究Mxene的质量分数对电池组温度分布的影响,并进一步对电池组仿真模型进行研究,探讨电池间距、环境温度和对流传热系数对电池组散热性能的影响。研究表明:当石蜡和Mxene质量比为1∶1,X轴和Y轴方向电池组的间距分别为20和10 mm,环境温度控制在34℃之内,对流传热系数为4 W/(m·K)时,该电池组的散热效果最好。
For the sake of guaranteeing the safety and stability of lithium ion battery,it is absolutely necessary to establish a credible battery thermal management system in handling battery thermal related problems and ensuring the performance,safety and life of power battery.Phase change cooling has simple structure,high cooling efficiency and better temperature balance performance and so on.The thermal conductivity of the new nano material Mxene is as high as 55.8 W/(m · K).Therefore,Mxene and paraffin wax are combined to construct a composite phase change material for the first time in this periodical.On the basis of the square lithium ion battery,BTMS with Mxene/paraffin wax as CPCM was established to study the effect of quality score of Mxene on the temperature distribution of battery pack.On the premise,further optimizing the battery pack model to probe into the effect of the battery spacing,the ambient temperature and the convective heat transfer coefficient on the heat dissipation performance of battery pack.The results show that when the mass ratio of paraffin to Mxene is 1:1,the spacing between the batteries in X-axis and Y-axis is 20 and 10 mm respectively,the ambient temperature is controlled within 34 ℃,and the convective heat transfer coefficient is 4 W/(m · K),the heat dissipation effect of the battery pack is the best.
作者
贺春敏
杨翼
蔡天鏖
沈雪阳
HE Chunmin;YANG Yi;CAI Tianao;SHEN Xueyang(College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing Jiangsu 210000,China)
出处
《电源技术》
CAS
北大核心
2023年第5期627-631,共5页
Chinese Journal of Power Sources
基金
江苏高校自然科学基金面上项目(20KJB480003)。
关键词
锂离子电池
相变冷却
热管理系统
lithium ion battery
phase change cooling
thermal management system
