基于过冷相变材料热开关的锂离子电池热管理系统  

Lithium-ion Battery Thermal Management System Based on the Combination of Supercooled Phase Change Material and Thermal Switch

作　　者：王泽旭 李冰辰 许瑶 刘倩[1] 李凯璇 巨星 WANG Zexu;LI Bingchen;XU Yao;LIU Qian;LI Kaixuan;JU Xing(Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education(North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]电站能量传递转化与系统教育部重点实验室(华北电力大学),北京市昌平区102206

出　　处：《发电技术》2022年第2期328-340,共13页Power Generation Technology

基　　金：国家自然科学基金项目(51876062)。

摘　　要：针对动力电池热管理的问题,提出一种耦合过冷相变材料六水合氯化钙和热开关的新型温控热开关装置。以18650圆柱型锂离子电池为对象,应用热开关装置并基于数值方法对其冷却和保温效果展开研究。装置基于过冷相变材料的体积变化特性提供机械热开关动作能力,与相变材料过冷现象结合进一步提高温控能力。分析结果表明,与无热开关的温控方式相比,过冷相变热开关温控使电池在5C高倍率放电结束时的最终温度下降了1.61℃,在外界环境温度-20℃时,过冷性相变热开关温控使电池温度管理时间延长了660 s。In view of the battery thermal management system,a novel type of thermal management system based on the coupling of supercooled phase change material calcium chloride hexahydrate and thermal switch was proposed.The thermal switch device was applied to 18650 lithium-ion battery and the cooling and heat preservation effects of the device were studied based on numerical method.The device provides power for thermal switch based on the significant change of the volume of the phase change material.Besides,it combines with the characteristics of the supercooled of the phase change material to further improve the temperature control capability.The results show that,compared with the thermal management system without thermal switch,the supercooled phase change thermal switch device can reduce the battery temperature by 1.61℃at the end of 5C high-rate discharge.Moreover,when the external environment temperature is-20℃,the supercooled phase change thermal switch system extends the battery temperature management time by 660 s.

关 键 词：锂离子电池 热开关 六水合氯化钙 电池热管理 数值模拟 

分 类 号：TK02[动力工程及工程热物理] TM912[电气工程—电力电子与电力传动]