湿芯辅助的动力电池热管理系统的热特性研究  

Performance Analysis of a Wet Pad Assisted Air-cooled Battery Thermal Management System

作　　者：马肖娜 陈奕 严华夏 陶求华[1] 范益沿 Ma Xiaona;Chen Yi;Yan Huaxia;Tao Qiuhua;Fan Yiyan(School of Marine Equipment and Mechanical Engineering,Jimei University,Xiamen,361021;Dong Jing(Xiamen)Energy Limited Company,Xiamen,361023)

机构地区：[1]集美大学海洋装备与机械工程学院,厦门361021 [2]东净(厦门)能源有限公司,厦门361023

出　　处：《制冷与空调（四川）》2023年第6期760-767,共8页Refrigeration and Air Conditioning

基　　金：福建省自然科学基金(2022J05154);集美大学引进高层次人才科研启动基金(ZQ2020009)。

摘　　要：风冷电池热管理技术发展成熟且成本低廉,但由于空气的对流系数小,限制了传统风冷系统的散热能力。为了强化传热,设计了一种湿芯辅助的强制风冷电池热管理系统。利用Fluent软件建立锂离子电池组生热模型,对比研究不同室外参数和风速下同一电池组在传统风冷和湿芯辅助下的电池热特性。湿芯可使电池组进风温度降低4.9-6.6℃,从而降低电池表面的最高温度,但电池组均温性会稍微恶化。在较热和干燥的环境条件下,湿芯可以获得更高的冷却效率。在38℃高温环境下,湿芯辅助的风冷系统仍可避免电池过热的风险,但不推荐低于1.0m/s的风速。Air-cooled battery thermal management technology is well-developed and inexpensive,but the small convection coefficient of air limits the heat dissipation capability of the system.To enhance the cooling capacity of the system,a wet pad is applied to pre-cool the air before it passes through the battery pack.Fluent software is used to establish a model of the lithium-ion battery pack to simulate the surface temperature of the battery.A comparative study on the temperature distribution of the same battery pack with and without the wet pad is conducted under various ambient conditions and air velocity.Simulation results show that with the assistance of the wet pad,air can be cooled by 4.9℃-6.6℃before passing the battery pack,resulting in a lower maximum surface temperature of the battery,but a slightly larger temperature difference among batteries can be observed.Better cooling performance of the wet pad can be obtained at higher and arid ambient conditions.Under hot and dry ambient conditions,assisted wet pads can achieve higher cooling efficiency.Compared with traditional batteries,the air cooling system with wet pad assistance can still avoid the risk of battery overheating in extreme high temperature environments at 38℃,but air velocity below 1.0 m/s is not recommended.

关 键 词：电池热管理 强制风冷 直接蒸发冷却 CFD仿真 

分 类 号：U264.55[机械工程—车辆工程]