平板热管–PCM复合动力电池散热系统性能研究  

Study on a Composite Power Battery Thermal Management System Based on Flat Heat Pipe-PCM

作　　者：王烨 胡成志 王涛[2] 唐大伟[1] 胡显锋 王奎明 李宏阳 WANG Ye;HU Cheng-Zhi;WANG Tao;TANG Da-Wei;HU Xian-Feng;WANG Kui-Ming;LI Hong-Yang(Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,School of Power Engineering,Dalian University of Technology,Dalian 116024,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]大连理工大学能源与动力学院海洋能源利用与节能教育部重点实验室,大连116024 [2]中国科学院工程热物理研究所,北京100190

出　　处：《工程热物理学报》2022年第3期749-757,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51806028,No.51876027);中央高校基本科研业务费(No.DUT19JC09)。

摘　　要：电池在运行过程中产生大量热,对其性能和寿命均造成影响,本文针对多个并联电池组进行散热研究,在保证高散热功率的同时兼顾对电池组温差的控制。文中基于平板热管设计了两种热管理系统:平板热管散热系统,平板热管与相变材料(PCM)复合的散热系统。在3 C高工作电流下,平板热管散热系统可以保证电池组内最高温度为308.99 K,最大温差为4.01 K,但存在单块电池上温差过大的问题,占到并联电池组总温差的72%以上。而平板热管–PCM复合散热系统内相变材料发生相变时吸热但温度不发生变化,可以解决单块电池温差过大的问题,相较于平板热管散热系统,平板热管–PCM复合散热系统使得电池平均温度和最大温差分别降低3.65 K和0.56 K,且复合散热系统相较于平板热管散热系统在低温工作环境下具有更好的工作性能。Batteries will produce a lot of heat during working, which affects its performance and life span. In this paper heat dissipation of multiple parallel battery packs is studied. High heat dissipation power is ensured while temperature difference of the battery pack is controlled. In this paper, two kinds of battery thermal management system based on flat heat pipe are designed: Flat heat pipe cooling system, flat heat pipe-phase change material(PCM) composite cooling system.Under the high operating current of 3 C, the flat heat pipe cooling system can control the maximum temperature in the battery pack to 308.99 K and the maximum temperature difference to 4.01 K.However, there is still a large temperature difference on a single battery, accounting for more than 72% of the total temperature difference of the parallel battery pack. The phase change material in the flat heat pipe-PCM composite cooling system absorbs heat while the temperature does not change, so the composite cooling system can solve the above problem. Comparing with the flat heat pipe cooling system, the average temperature and the maximum temperature difference of the flat heat pipe-PCM composite cooling system are reduced by 3.65 K and 0.56 K respectively. Moreover, the composite cooling system has better performance in low temperature working environment comparing with the flat heat pipe cooling system.

关 键 词：电池热管理系统 平板热管 相变材料 电池均温性 

分 类 号：TK114[动力工程及工程热物理—热能工程]