摘要
烘干箱是锂电池极片制备过程中干燥工艺的关键设备之一。风刀作为烘干箱的重要执行元件,其选型对烘干箱内的空气流场分布具有重要影响。设计了4种不同的风刀结构型式,在Fluent软件中设定多孔网板进风面的进风速度为3 m/s;进行了数值模拟分析,通过CFD-Post对计算结果进行后处理;基于仿真结果确定了最优的结构设计。研究发现:1)Ⅰ、Ⅳ型风刀试验箱内热风流动迹线可以完全覆盖极片表面;2)Ⅳ型风刀试验箱风嘴内外热风的速度数值为2.2~2.5 m/s,明显高于其他模拟工况,并且风嘴内外高速微粒流覆盖和延伸的区域最多;3)Ⅳ型风刀试验箱极片表面高速波峰区域速度数值集中分布在0.8~1.2 m/s,明显好于其他模拟工况,并且极片长度方向上的速度分布连续性及一致性最好。所以Ⅳ型风刀作为锂电池极片干燥工艺的执行元件是最佳选择。相关设计思路和测试方法为烘干箱优化设计,乃至其他非标部件最优参数的确定提供了理论支撑。
Drying device is one of the key devices in the drying process of lithium battery pole pieces.Air knife,as an important executive component of the drying device,its selection has an important influence on the distribution of air flow field in the drying device.4 different structural types of air knives are designed,and the air inlet speed of the air inlet surface of the porous mesh plate is set to 3 m/s in the Fluent software;the numerical simulation analysis is carried out,and the calculation results are postprocessed by CFD-Post;the optimal structural design is determined based on the simulation results.It is found that:1)the hot air flow trace in the test chambers of I-type and IV-type air knife can completely cover the surface of the pole piece;2)the velocity value of hot air inside and outside the tuyere of the test chamber of IV-type air knife is 2.2~2.5 m/s,which is obviously higher than other simulated working conditions,and the area covered and extended by high-speed particle flow inside and outside the tuyere is the most;3)the velocity values in the high-speed wave peak area on the surface of the pole piece of the test chamber of IV-type air knife are concentrated in 0.8~1.2 m/s,which is obviously better than other simulated working conditions,and the continuity and consistency of velocity distribution in the length direction of the pole piece are the best.Thus,the IV-type air knife is the best choice as the executive component of the drying process of lithium battery pole pieces.The related design ideas and test methods provide theoretical support for the optimal design of drying device and the determination of the optimal parameters of other non-standard components.
作者
马晓昂
牛哲哲
于兴林
徐良芝
MA Xiaoang;NIU Zhezhe;YU Xinglin;XU Liangzhi(Geely Automobile Research Institute(Ningbo)Co.,Ltd.,Ningbo 315336,China)
出处
《工业技术创新》
2021年第4期124-130,共7页
Industrial Technology Innovation
作者简介
通信作者:马晓昂(1994—),男,汉族,山西人,毕业于太原科技大学,机械工程硕士。研究方向:非标装备、智能制造系统。E-mail:907405754@qq.com;牛哲哲(1986—),男,浙江人,工程师。研究方向:柔性制造、智能制造系统。E-mail:Zhezhe.Niu@Geely.com;于兴林(1980—),男,天津人,高级工程师。研究方向:汽车智能制造。E-mail:Xinglin.Yu@Geely.com;徐良芝(1985—),男,江苏人,工程师。研究方向:规模化定制生产模式创新。E-mail:yceddy@163.com
