Analysis of several coating methods for lithium batteries

The foil substrate passes through the coating roller and directly contacts the slurry tank. The excess slurry is coated on the foil substrate. When the substrate passes between the coating roller and the doctor blade, the gap between the doctor blade and the substrate determines the coating. At the same time, the excess slurry is scraped off and reflowed, thereby forming an even coating on the surface of the substrate. The squeegee type is critical to the comma squeegee. ②Slit extrusion coating is a precise wet coating technology. The working principle is that the coating liquid is extruded and ejected along the gap of the coating die under a certain pressure and flow rate and transferred to the substrate. Compared with other coating methods, it has many advantages, such as fast coating speed, high precision, and average wet thickness; the coating system is closed, which can guard against the entry of contaminants during the coating process, and the slurry utilization rate is high, and the slurry can be maintained. It has stable properties and can be used for multi-layer coating at the same time. Whether the lithium battery coating process can accurately use the best coating and drying process in the design process and balance the relationship between the two will ultimately affect the comprehensive technical performance of the coating. In the pole piece coating, common problems include raw material contamination, instability of the coating process, irregular operation, incorrect drying program settings, etc., and these problems will cause more or less defects in the pole piece. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.