锂电池极片干燥过程供风量计算模型

Calculation models of air supply volume for drying process of lithium battery film

基于热力学第一定律,依据干燥静力学原理,结合锂电池极片涂层干燥工艺的特点和要求,对水溶剂涂层的预热阶段、恒速干燥过程及降速干燥过程进行理论研究。探讨干燥过程的能量利用规律及湿空气的热力过程特性,提出一种确定干燥系统供风流量的计算模型,该模型描述了供风温度、干燥压力、极片涂层含湿率、极片走带速度、片幅宽度、涂层厚度、空气相对湿度等因素与供风量之间的依变关系,为实际生产中干燥工艺的实施及节能降耗提供理论参考。

Based on the first law of thermodynamics and principle of drying statics, the theoretical research on preheat process, constant rate drying process and falling rate drying process of water solvent coating were expanded reference for the characteristics and requirements of drying technology of lithium battery film coating. The laws of energy utilization and the thermodynamic process characteristics of wet air in drying process were discussed. The calculating models for air flow rate in drying system were put forward by which the relationship between the air supply volume and the air supply temperature, drying pressure, the moisture content of film coating, the moving speed of film, the width of film, the thickness of coating and the relative humidity of air were described. Those studies provided the theory references for the implementing of drying technology and the energy saving and consumption reduction in actual production.