风冷电池热管理系统参数研究与性能优化  

Parameter Research and Performance Optimization of Air-cooled Battery Thermal Management System

作　　者：马肖娜 严华夏 陈奕 王玉刚[1] 陶求华[1] 范益沿 Ma Xiaona;Yan Huaxia;Chen Yi;Wang Yugang;Tao Qiuhua;Fan Yiyan(School of Marine Equipment and Mechanical Engineering,Jimei University,Xiamen,361021;Dong Jin(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）》2024年第5期614-620,共7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：为提高风冷电池热管理方式的冷却能力,设计了一种湿芯辅助的风冷电池热管理系统。运用Fluent软件对不同充电倍率和电池数量的电池组温度场进行仿真计算,并通过加装铝片改善电池组内均温性。结果表明:与传统风冷电池热管理系统相比,湿芯的运用能有效降低电池表面的最高温度,更能适应高充电倍率和电池数量较多的电池组的散热需求;但均温性较传统风冷系统稍差。充电倍率为2C时,传统强制风冷和湿芯辅助的风冷电池热管理系统在电池数目超过45个时,电池组内温差均超过5℃。提出在电池外包裹铝片的方法改善电池组均温性,模拟结果显示,加装铝片可有效降低后排电池温度,以应对高充电倍率散热。模拟结果显示:2C充电倍率、电池数量为60个时,电池组最大温差由6.90℃降低至5.68℃。To improve the cooling capacity of air-cooled battery thermal management system,a wet pad is applied to pre-cool the air before it passing through the battery pack.Fluent software was used to simulate the temperature field of battery packs under different charge rate and number of cells,and the temperature uniformity was improved by wrapping aluminum sheets on the external of each battery.The results show that compared with a traditional air-cooled battery thermal management system,the use of wet pad can reduce the maximum surface temperature of the battery,which is more adaptable to the heat dissipation needs of battery packs with higher charge rate and cell numbers.At the same time,the temperature uniformity is slightly deteriorated via the wet pad.At 2C charge rate,the battery pack temperature difference of the both systems go beyond the limit of 5℃when the number of batteries is 45.The method of wrapping aluminum sheets outside the battery to improve the temperature uniformity of the battery pack shows that it can effectively reduce the temperature of the rear battery to cope with high charge rate heat dissipation.When the charge rate is 2C and the number of batteries is 60,the maximum temperature difference of the battery pack decreases from 6.90℃to 5.68℃.

关 键 词：电池热管理 强制风冷 蒸发冷却 CFD仿真 均温性 

分 类 号：U264.55[机械工程—车辆工程]