摘要
针对大规模集成储能锂电池的温度一致性需求,提出一种基于热管的散热结构,包括导热铝箱和热管。选取储能锂电池包作为研究对象,建立三维产热模型。采用数值模拟的方法,首先确定热管最佳布置方式;再通过正交试验法探究散热结构中各因素对电池温度影响的重要性,并进行参数选优;最后探究热管冷凝段对流换热强度对电池温度的影响。结果表明:1)与其他布置方式相比,当蒸发段沿电池宽度方向且冷凝段双侧布置时,电池具有最优的均温性;2)各因素对电池最高温度的影响重要性依次为:电池容纳腔X方向壁厚>热管数量>电池容纳腔Y方向壁厚>导热铝箱底部厚度;3)增强热管冷凝段处的对流换热后,电池最高温度有所降低,但电池均温性也会变差。研究结果可为储能用锂电池散热结构设计提供指导。
A new type of heat dissipation structure based on heat pipes,including thermal conductive aluminum box and heat pipes,is proposed in this paper to meet the temperature consistency requirements of large-scale integrated energy storage lithium batteries.One energy storage lithium battery pack is selected as the research focus.First,a threedimensional thermogenic model is established.Then the arrangement of the heat pipes is determined,and the influences of selected factors in the heat dissipation structure on the maximum temperature and temperature difference of the battery are explored by using the orthogonal test method.Finally,the effect of the convective heat transfer intensity in the condensation section of the heat pipe on the maximum temperature and temperature difference of the battery is analyzed.The results show that:1)Compared with the other arrangements,when the evaporation section of the heat pipe is arranged along the width of the battery and the condensation section of the heat pipe is placed on both sides,the temperature uniformity of the battery is optimal.2)The influence of selected factors on the maximum temperature of the battery in order of importance is as follows:the wall thickness of the battery chamber in X direction>the number of the heat pipes>the wall thickness of the battery chamber in Y direction>the thickness of the bottom of the thermal conductive aluminum box.3)By enhancing the convection heat transfer at the condensation section of the heat pipe,the maximum temperature of the battery can be reduced.However,the temperature difference of the battery will be increased.This study can provide guidance for the design of heat dissipation structure of lithium battery for energy storage.
作者
马菁
段志勇
孙勇飞
孙亚松
MA Jing;DUAN Zhiyong;SUN Yongfei;SUN Yasong(School of Automobile,Chang’an University,Xi’an 710018,Shaanxi Province,China;School of Energy and Electrical Engineering,Chang’an University,Xi’an 710018,Shaanxi Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2023年第17期6737-6745,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(51976014)
国家博士后基金特别资助项目(2019T120874)
中央高校基本业务费项目(30010229305)。
关键词
锂电池
储能
热管
散热结构设计
数值模拟
lithium battery
energy storage
heat pipe
heat dissipation structure design
numerical simulation
