基于复合相变材料的锂离子电池控温性能  

Temperature Control Performance of Lithium-Ion Batteries Based on Composite Phase Change Materials

作　　者：刘仲康 张冠华 孙玥 LIU Zhongkang;ZHANG Guanhua;SUN Yue(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;SHANGHAI HIGHLY(GROUP)Co.Ltd.,Shanghai 201206,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海海立新能源技术有限公司,上海201206

出　　处：《新能源进展》2024年第6期696-703,共8页Advances in New and Renewable Energy

基　　金：国家自然科学基金项目(51976126);上海市自然科学基金项目(22ZR1442700)。

摘　　要：相变材料因其相变潜热对电池有良好温控效果,在电池热管理领域得到广泛研究。基于所制备的石蜡/月桂酸/膨胀石墨新型复合相变材料,利用实验和模拟研究了其在不同环境温度(20、25、30、35℃)以及高低两种放电倍率(0.5 C、1.0 C)的温升特性,实验模拟最大误差控制在4.1℃以内。对比分析了6 mm和10 mm相变材料厚度对相变冷却的影响,在两种相变材料厚度冷却下,电池最高温度分别为49.92℃和41.94℃,分别下降了20.28℃和28.26℃,且10 mm相变冷却在不同工况下相变材料能完全吸收电池热量,有效降低和均匀电池温度,达到更好的控温效果。Phase change materials have attracted significant research attention in battery thermal management due to their effective temperature control properties attributed to their latent heat of phase change.This study focuses on a novel composite phase change material comprising paraffin,lauric acid,and expanded graphite.Experimental and simulated investigations were conducted to study its temperature rise characteristics at various environmental temperatures(20,25,30,35℃)and at different discharge rates(0.5 C and 1.0 C).The maximum error in the experimental simulations was controlled to be within 4.1℃.A comparative analysis was conducted on the difference of 6 mm and 10 mm phase change material thickness to investigate their influence on phase change cooling.Under both phase change cooling configurations,the maximum battery temperatures recorded were 49.92℃ and 41.94℃,respectively,reducing 20.28℃ and 28.26℃,respectively.Significantly,the 10 mm phase change cooling system demonstrated the capacity to entirely absorb battery-generated heat under varying operational conditions,effectively diminishing battery temperature and ensuring uniform thermal distribution,thus achieving an enhanced temperature control effect.

关 键 词：复合相变材料 电池热管理 软包电池 相变冷却 

分 类 号：TK911[动力工程及工程热物理]