共流型和逆流型圆柱形锂离子电池组液基冷却系统分析
Analysis of liquid-based cooling system of cylindrical lithium-ion battery pack with co-and counter-flow patterns
S.M.HASSANI 1S.H.MAZLOUMI 1M.KHOSHVAGHT-ALIABADI2
作者信息
- 1. Department of Chemical Engineering,Faculty of Engineering,Ferdowsi University of Mashhad,Iran
- 2. Department of Chemical Engineering,Shahrood Branch,Islamic Azad University,Shahrood,Iran;School of Mechanical Engineering,Korea University,145 Anam-ro,Seongbuk-gu,Seoul 02841,Korea
- 折叠
摘要
随着电动汽车对锂离子电池组比能量密度要求的提高,解决电池在恶劣工况下的热稳定性问题在电池组的安全设计中变得越来越重要.这对于缓解里程焦虑和确保电动汽车的整体安全尤为重要.液体冷却系统是锂离子电池热管理的常用方法.本文采用三维计算流体动力学模拟分析了圆柱电池组矩形通道水冷系统的性能.采用有限体积法,用实验数据验证了计算结果.首先,研究了通道的收敛和发散对所考虑的冷却系统热特性和水力特性的影响.然后,研究了冷却剂的共流型和逆流型策略.结果表明,与传统设计相比,通道的收敛使系统的努塞尔数提高了约21%.而沟道分流时,水力性能较好.散流冷却系统的摩擦损失减小约70%.研究还发现,流动模式对控制电池组的温度均匀性是相当有效的.通道的逆流模式提供了较低的温度,并且在发散通道的情况下,与共流模式的最大偏差约为5.2 K.
Abstract
As the demand for higher specific energy density in lithium-ion battery packs for electric vehicles rises,addressing thermal stability in abusive conditions becomes increasingly critical in the safety design of battery packs.This is particularly essential to alleviate range anxiety and ensure the overall safety of electric vehicles.A liquid cooling system is a common way in the thermal management of lithium-ion batteries.This article uses 3D computational fluid dynamics simulations to analyze the performance of a water-cooled system with rectangular channels for a cylindrical battery pack.A finite volume method is used,validating the results with experimental data.Firstly,the effects of converging and diverging of channels on the thermal and hydraulic characteristics of the considered cooling system are investigated.Then,the co-and counter-flow pattern strategies of the coolant are studied.The results indicate that converging the channels leads to the Nusselt number enhanced by about 21%compared to the conventional design of the system.However,better hydraulic performance is found for the case with diverging channels.The decrement in the friction loss of the cooling system with diverging channels is about 70%.It is also found that the flow pattern is considerably effective in controlling the temperature uniformity of the battery pack.The counter-flow pattern of the channels provides lower temperatures,and the maximum deviation from the co-flow pattern(～5.2 K)can be found for the case with diverging channels.
关键词
圆柱电池/液冷系统/不均匀的渠道/温度均匀性/性能指标Key words
cylindrical battery/liquid cooling system/nonuniform channels/temperature uniformity/performance index引用本文复制引用
基金项目
Research Deputy of Ferdowsi University of Mashhad,Iran(57991-7/10/1400)
出版年
2023
NETL
NSTL
维普
万方数据