锂电池包热管理系统性能分析  

Thermal Management Analysis of Lithium Battery Pack

作　　者：隋增光 林昊晟 孙钦[2] 董凯军[2] 耿曼 吴伟[1] SUI Zengguang;LIN Haosheng;SUN Qin;DONG Kaijun;GENG Man;WU Wei(School of Energy and Environment,City University of Hong Kong,Hong Kong 999077,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;Guangzhou Goaland Innovation Technologies Co.Ltd.,Guangzhou 510705,China)

机构地区：[1]香港城市大学能源与环境学院,中国香港999077 [2]中国科学院广州能源研究所,广州510640 [3]广州高澜创新科技有限公司,广州510705

出　　处：《新能源进展》2023年第6期499-505,共7页Advances in New and Renewable Energy

基　　金：广州开发区国际科技合作项目(2021GH07)。

摘　　要：电池包作为电动汽车的动力源,其性能决定着电动汽车的安全与寿命,有效的热管理系统对电池包的安全运行起到至关重要的作用。在数值传热学理论基础上,建立电池包液冷系统热-流-电模型,综合分析电池包液冷板在0.5 C和1.0 C工况下的流场与温度场分布。结果表明:进出口处存在明显的流动阻力,液冷板进出口压差高达11.82kPa,导致泵耗显著增加;液冷板温度呈现明显的不均匀性,放电倍率从0.5C增加到1.0C,温度不均匀性由3.16℃增加到5.57℃。同时,还考虑了电池包在瞬态工况下的温度变化。该研究可为电池包热管理系统的设计与优化提供参考。Battery pack is the power source of electric vehicles,and its performance determines the safety and lifespan of the electric vehicles.Effective thermal management systems play a vital role in the safe operation of battery packs.Based on the theory of numerical heat transfer,this work develops a thermal-flow-electrical coupling model of a battery pack liquid cooling system.It comprehensively analyzes the flow and temperature field distributions of the battery pack liquid cooling plate under 0.5 C and 1.0 C operating conditions.Results show obvious flow resistance at the inlet and outlet,causing the pressure difference between the inlet and outlet of the liquid cooling plate to be as high as 11.82 kPa,which significantly increases pump power.The temperature distribution of the liquid cooling plate shows obvious non-uniformity,and the non-uniformity increases from 3.16℃ to 5.57℃ under steady-state operating conditions with the discharge rate increasing from 0.5 C to 1.0 C.In addition,this work also considers the temperature variation of the battery pack under transient conditions.This study can provide a reference for the optimization design of battery pack thermal management systems.

关 键 词：电池包 液冷散热器 数值模拟 热管理 

分 类 号：TK0[动力工程及工程热物理] TB6[一般工业技术—制冷工程]