The lithium battery separator production line mainly includes key equipment and technologies such as ingredient extrusion, casting, stretching, extraction, drying and winding. Here's a closer look at these links:
Ingredient extrusion system: This step is the first step in the production of the diaphragm, where the raw materials are mixed, plasticized and extruded to form the required diaphragm.
Casting: The diaphragm extruded by batching needs to be cast, that is, the diaphragm is calendered at a certain temperature and pressure to make it have a certain thickness and flatness.
Stretching: The cast diaphragm needs to be stretched to increase its mechanical properties and dimensional stability. The stretching process can be divided into longitudinal stretching and transverse stretching.
Extraction: The stretched diaphragm needs to be extracted to remove solvents and additives from it, giving the diaphragm better electrochemical performance and stability.
Drying: The extracted diaphragm needs to be dried to remove moisture and residues from it, giving it better insulation properties and stability.
Rewinding: The dried diaphragm needs to be rewound for subsequent processing and use. During the winding process, attention needs to be paid to maintaining the flatness and tension stability of the diaphragm.
In addition, the lithium battery separator production line also needs to be equipped with corresponding automatic control systems and testing equipment to ensure the stability of the production process and the consistency of product quality. At the same time, with the continuous progress of technology and the continuous change of application needs, the lithium battery separator production line also needs to be constantly updated and upgraded to meet the new market demand and technical challenges.