低温环境下电动汽车动力电池热管理研究  

Research on Thermal Management of Electric Vehicle Power Batteries in Low Temperature Environment

作　　者：刘丹 宋伟萍 LIU Dan;SONG Weiping(Shaanxi National Defense Industry Vocational Technical College,Xi’an 710300,China)

机构地区：[1]陕西国防工业职业技术学院,西安710300

出　　处：《自动化与仪器仪表》2025年第1期56-60,共5页Automation & Instrumentation

基　　金：陕西国防工业职业技术学院2022年度科研项目项目《气体灭火设备的电磁式容器阀门泄漏检测系统设计》(Gfy22-42)。

摘　　要：为实现该系统在低温环境下散热和加热热性的分析,研究设计扁平超薄微热管,将其应用于3.2 V50 Ah的锂离子动力电池包,同时构建分段式热阻模型耦合电池热模型分析动力电池散热和加热温度场分析。研究结果表明,分段式电阻模型和整体式电阻模型,温度最大值为31.2℃和35.7℃,电池包最大温差分别为6.8℃和8.9℃。研究构建的分段式热阻模型耦合电池热模型能精准实现对电池包散热温度场动态变化规律预测。研究所设计的扁平超薄微热管在不同低温环境下动力电池包中均具有理想的加热效果,同时在不同对流条件下散热效果良好。扁平超薄微热管在实际电动汽车应用中可极大程度降低热量的聚集,防止出现热失控现象,适用于小型和大型电动汽车动力电池热管理系统。In order to analyze the heat dissipation and heating performance of the system in low-temperature environments,a flat ultra-thin micro heat pipe was designed and applied to a 3.2V50Ah lithium-ion power battery pack.At the same time,a segmented thermal resistance model coupled with a battery thermal model was constructed to analyze the heat dissipation and heating temperature field of the power battery.The research results indicate that the segmented resistance model and the integrated resistance model have maximum temperature values of 31.2℃and 35.7℃,and the maximum temperature difference of the battery pack is 6.8℃and 8.9℃,respectively.The segmented thermal resistance model coupled with the battery thermal model can accurately predict the dynamic changes in the temperature field of battery pack heat dissipation.The flat ultra-thin micro heat pipes designed by the research institute have ideal heating effects in power battery packs under different low-temperature environments,and also have good heat dissipation effects under different convection conditions.Flat ultra-thin micro heat pipes can greatly reduce heat accumulation and prevent thermal runaway in practical electric vehicle applications,and are suitable for thermal management systems of small and large power vehicle power batteries.

关 键 词：纯电动汽车 动力电池热管理 液冷板 温度场 

分 类 号：U469.722[机械工程—车辆工程] TP202[交通运输工程—载运工具运用工程]