电池组散热模型仿真分析及散热结构优化  

Battery heat dissipation model simulation analysis and heat dissipation structure optimization

作　　者：廖中文[1] 王海林[2] LIAO Zhongwen;WANG Hailin(Guangdong AIB Polytechnic,Scientific Research and Industrial Services,Guangzhou,Guangdong Province,510507,China;South China Agriculture University,Guangzhou,Guangdong Province,510642,China)

机构地区：[1]广东农工商职业技术学院科研与产业服务处,广东广州510507 [2]华南农业大学工程学院,广东广州510642

出　　处：《电池工业》2022年第5期223-227,共5页Chinese Battery Industry

基　　金：2021年度广东农工商职业技术学院重点课题(XJZD202101);2022年度广东省普通高校特色创新类项目(2022KTSCX288)。

摘　　要：目前,我国新能源汽车发展面临核心技术创新能力不强等诸多问题,其中动力电池的安全性就是阻滞新能源汽车产业发展的关键因素之一。考虑到锂离子动力电池仍然是新能源汽车装车的首选,本文以某国产电动汽车动力电池组为例,为解决锂离子动力电池在充放电过程中,由于热效应带来温度上升、温度不均,甚至温度失控的问题,通过一定的假设与计算流体力学方法,在ANSYS软件中构建三维热模型,通过对比分析自然冷却、强制冷却和交替进风散热三种状态下的冷却效果,在风速2.5 m/s时,4次交替进风的温差比强制风冷散热的温差降低了2.4℃,证明交替进风散热在改善电池组风冷散热的均匀性,降低电池组温度积聚方面有一定的作用,为动力电池组散热结构优化设计提供了参考和借鉴。At present, the development of new energy vehicles in China also faces many problems such as weak core technology innovation ability.The safety of power battery is one of the key factors to block the development of new energy vehicle industry.Considering the lithium ion power battery is still the first selection of new energy vehicles loading, this paper takes a domestic electric vehicle power battery as an example, to solve in the process of charging and discharging lithium ion power batteries, due to the heating temperature, temperature rising inequality, even the problem of temperature control, through certain assumptions and computational fluid dynamics method, A three-dimensional thermal model was built in ANSYS software, and the cooling effects under three states of natural cooling, forced cooling and alternating air inlet cooling were compared and analyzed.when the wind speed is 2.5 m/s, the temperature difference of four alternating air inlet is 2.4 ℃ lower than that of forced air cooling heat dissipation.It is proved that alternating air inlet heat dissipation can improve the uniformity of air cooling heat dissipation of battery pack and reduce the temperature accumulation of battery pack, it provides reference for optimization design of heat dissipation structure of power battery pack.

关 键 词：电池组 散热模型 仿真分析 散热结构 优化设计 

分 类 号：U461.4[机械工程—车辆工程]