锂电池极片孔阵列冲击射流干燥流场特性研究  

Study on flow field characteristics of Li-ion battery electrode film drying with hole-array impinging jet

作　　者：张莲 李徐佳[1] 刘华[1] 李贵敬 许宏鹏 ZHANG Lian;LI Xujia;LIU Hua;LI Guijing;XU Hongpeng(School of Vehicles and Energy,Yanshan University,Qinhuangdao,Hebei 066004,China)

机构地区：[1]燕山大学车辆与能源学院,河北秦皇岛066004

出　　处：《燕山大学学报》2024年第6期493-502,共10页Journal of Yanshan University

基　　金：河北省自然科学基金资助项目(E2022203036)。

摘　　要：为解决锂离子电池极片在传统干燥设备中因回风气流过于集中导致的涂层边缘卷曲、开裂问题,提出了一种适用于锂电池极片干燥工艺的孔阵列冲击射流干燥型式及其设计基本原则;利用SolidWorks软件建立孔阵列构型(干燥箱内主要均流元件)的几何模型,通过有限体积法求得其稳态流场,验证了孔阵列构型设计思路的正确性以及新回风方式的合理性;对不同排布密度的孔阵列结构构型进行了速度场、温度场分布特性的定性与定量分析,确定了常规干燥条件下最佳的阵列结构。结果表明,在工艺和工况允许范围内,增大孔阵列排布密度能够提升干燥箱及极片表面流场分布均匀性,从而提高干燥换热效率,为锂电池干燥设备改进、干燥质量改善等提供参考。To solve the problem of coating edge curling and cracking caused by excessive concentration of return air flow in traditional drying equipment for Li-ion battery electrode film,a hole-array impact jet drying type and its basic design principles suitable for Li-ion battery electrode film drying process is proposed.A geometric model for the hole-array configuration(the main flow sharing component in the drying chest)was established using SolidWorks software.The steady-state flow field was obtained using the finite volume method,verifying the correctness of the hole-armay configuration design concept and the rationality of the new retum air method design.Qualitative and quantitative analysis was conducted on the distibution characteristics of velocity and temperature felds of hole-array structures with different densities,and the optimal array structure was determined under.conventional drying conditions.The results indicate that increasing the density of hole-aray arrangement can improve the uniformity of flow field distribution on the surface of the drying chest and electrode within the allowable range of process and operating conditions.Furthermore,it can improve the drying heat exchange eficiency and providing reference for the improvement of li-ion battery drying equipment and drying quality.

关 键 词：锂电池 极片 干燥箱 孔阵列 冲击射流 

分 类 号：TK173[动力工程及工程热物理—热能工程]