摘要
通常情况下,动力电池系统的性能受温度影响较大,使动力电池在合理温度区间内工作需要热管理系统的参与,该系统也是提高动力电池温度一致性的有效途径。其中,液冷系统的散热效果和流道分布的走向有关,因此实施液冷系统的流道设计至关重要。文章对比了不同温升速率下电池充电时间的差异,并提出六种流道结构,基于低温加热工况,利用Star CCM+软件对六种结构进行了流场及热场仿真分析。结果表明新能源汽车采用液冷系统的必要性;通过流道设计优化,有效降低了系统流阻并提高了系统的均温性;同时证明了只有通过模块化液冷系统散热分析研究,并结合实际工程中的应用需求,才有望获得性能最优且合理可行的液冷系统方案。
Under normal circumstances,the performance of the power battery system is greatly affected by temperature,so that the power battery works in a reasonable temperature range requires the participation of the thermal management system,which is also an effective way to improve the temperature consistency of the power battery.Among them,the heat dissipation effect of the liquid cooling system is related to the distribution trend of the flow channel,so it is important to implement the flow channel design of the liquid cooling system.In this paper,the difference of battery charging time under different temperature rise rates is compared,and six flow channel structures are proposed,and the flow field and thermal field simulation analysis of six structures is carried out by Star CCM+software based on low temperature heating conditions.The results show the necessity of adopting liquid cooling system for new energy vehicles.Through the optimization of the flow channel design,the flow resistance of the system is effectively reduced and the temperature uniformity of the system is improved.At the same time,it is proved that only through the heat dissipation analysis and research of modular liquid cooling system and combined with the application requirements in actual engineering,it is expected to obtain the best performance and reasonable and feasible liquid cooling system scheme.
作者
王欣欣
王明强
薛国正
马建生
张洪雷
WANG Xinxin;WANG Mingqiang;XUE Guozheng;MA Jiansheng;ZHANG Honglei(Hozon New Energy Automobile Company Limited,Jiaxing 314000,China)
出处
《汽车实用技术》
2024年第8期6-10,共5页
Automobile Applied Technology
关键词
动力电池系统
热管理系统
液冷系统
流道结构
Power battery system
Thermal management system
Liquid cooling system
Runner structure
