电化学储能系统电池柜散热的影响因素分析

Analysis of Influencing Factors of Battery Cabinet Heat Dissipation in Electrochemical Energy Storage System

电化学储能系统是“双碳”目标实现的有利抓手,安全是电化学储能系统发展的生命线。由于大量电池存放于储能电池柜,因此对其散热性能的研究具有重要的意义。针对磷酸铁锂锂离子电池系统机柜:构建了电池系统数值模型,获得了电池柜内的温度场和气流组织,试验结果验证了模型的合理性;研究了进口风速、单体电池间距以及电池组间距对电池柜散热性能的影响规律,支撑储能机柜的设计和运维管理;结果表明,电池柜在低倍率运行情况下可采用自然对流冷却,高倍率运行情况下需要强制风冷策略;机柜最高温度和最大温差都随着单体间距增加呈现先减小后增大的趋势;电池组间距对电池柜散热性能影响不显著,因此可通过减小电池组间距来节省安装空间。

The electrochemical energy storage system is an important grasp to realize the goal of double carbon. Safety is the lifeline of the development of electrochemical energy storage system. Since a large number of batteries are stored in the energy storage battery cabinet, the research on their heat dissipation performance is of great significance. For the lithium iron phosphate lithium ion battery system cabinet: A numerical model of the battery system is constructed and the temperature field and airflow organization in the battery cabinet are obtained, the experimental results verify the rationality of the model;The influences of inlet velocity, single battery spacing and battery pack spacing on the heat dissipation performance of the battery cabinet are studied, the results can support the design, operation and management of the energy storage cabinet;The results show that the battery cabinet can be cooled by natural convection under low-rate operation, and forced air cooling is required under high-rate operation;the maximum temperature and maximum temperature difference of the cabinet show a trend of first decreasing and then increasing with the increase of the battery spacing;the battery pack spacing does not have a significant impact on the heat dissipation performance of the battery cabinet, so the installation space can be saved by reducing the battery pack spacing.