摘要
为提高风刀除尘系统在新能源汽车动力电池极片的激光切割制造过程中的除尘效率,降低极片加工制造过程中的颗粒接触。本文建立了风刀除尘系统模型,通过流场与颗粒物的耦合计算,模拟了风刀除尘系统在不同工作参数下的除尘效果,利用正交模拟法对风刀出口速度、风刀安装间距和负压出口压强三个因素进行分析,并使用离散伴随法通过换气次数这一目标函数对模型进行形状优化。结果表明:接触极片表面的颗粒以1μm小颗粒为主,占84%以上,大粒径颗粒往往更容易沉降在加工空间下表面,负压出口的颗粒粒径相对分布均匀;从颗粒去除率(particle removal rate,PRR)的角度来说,上述三因素对PRR影响主次顺序为风刀出口速度、负压出口压强、风刀安装间距,对极片表面颗粒接触率(particle contact rate,PCR)的影响主次顺序为风刀出口速度、风刀安装间距、负压出口压强,最佳工作参数为风刀出口速度20 m/s,风刀离极片水平安装距离10 mm,负压出口压强为-20 Pa;通过离散伴随法优化风刀除尘系统外形形状,在提高110%的换气次数的条件下,使PRR从75.71%提高到91.61%,PCR从6.19%下降到5.15%。
In order to enhance the dust removal efficiency of the air knife dust removal system in the laser cutting manufacturing process of power battery electrodes for new energy vehicles and reduce particle contact during the electrode manufacturing process.In this paper,a model of the air knife dust removal system is established,and the dust removal effect of the air knife dust removal system under different working parameters is simulated through the coupling calculation of the flow field and particulate matter.The orthogonal simulation method is used to analyze the three factors of the air knife outlet velocity,the installation distance of the air knife and the pressure of the negative pressure outlet.The discrete adjoint method is used to optimize the shape of the model through the objective function of the number of air changes.The results show that:The particles on the surface of the contact electrode plate are mainly 1μm small particles,accounting for more than 84%.Large particle size is more likely to settle on the lower surface of the processing space,and the particle size at the negative pressure outlet is relatively uniform.From the perspective of the particle removal rate(PRR),the influence sequence of the three factors on PRR is in the order of air knife outlet velocity,negative pressure outlet pressure,and air knife installation spacing.For the particle contact rate(PCR)on the electrode surface,the influence sequence is air knife outlet velocity,air knife installation spacing,and negative pressure outlet pressure.The optimal working parameters are an air knife outlet velocity of 20 m/s,a horizontal installation distance of the air knife from the electrode of 10 mm,and a negative pressure outlet pressure of-20 Pa.The shape of the air knife dust removal system is optimized through the discrete adjoint method.Under the condition of increasing the number of air changes by 110%,the PRR is increased from 75.71%to 91.61%,and the PCR is decreased from 6.19%to 5.15%.
作者
梅雄
何义昌
MEI Xiong;He Yichang(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha,410114,China)
出处
《制冷》
2025年第4期45-55,共11页
Refrigeration
关键词
风刀除尘
动力电池
数值模拟
正交模拟
伴随优化
换气次数
Air Knife Dust Removal
Power Battery Numerical Simulation Orthogonal Simulation Adjoint Optimization Number of Air Changes
