What are the problems in the processing and manufacturing of lithium battery pole pieces?

What are the problems in the processing and manufacturing of lithium battery pole pieces? 1. The knife-coated foil substrate passes through the coating roller and directly contacts the slurry tank. The excess slurry is coated on the foil substrate, and the substrate passes through the coating roller and When the doctor blades are used, the gap between the doctor blade and the substrate determines the thickness of the coating, and at the same time, the excess slurry is scraped off and reflowed, thereby forming a uniform coating on the surface of the substrate. The squeegee type is an important comma squeegee. The comma blade is one of the key components in the coating head. Generally, a comma-like blade is formed along the bus bar on the surface of the round roller. This blade has high strength and hardness, easy to control the coating amount and coating accuracy, and is suitable for High solid content and high viscosity slurry. 2. Roller coating transfer type coating roller rotates to drive the slurry, adjusts the slurry transfer amount through the comma doctor gap, and uses the rotation of the back roller and the coating roller to transfer the slurry to the substrate. Roll coating transfer coating includes two Basic process: (1) The coating roller rotates to drive the slurry through the metering roller gap to form a slurry layer with a certain thickness; (2) The slurry layer with a certain thickness passes the coating roller and the back roller in opposite directions to transfer the slurry to the foil. A coating is formed on the material. 3. Slit extrusion coating is a precise wet coating technology. The working principle is that the coating liquid is extruded and sprayed 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 uniform wet thickness. The coating system is closed to prevent the entry of contaminants during the coating process, the slurry utilization rate is high, the slurry properties can be kept stable, and multi-layer coating can be performed simultaneously. And can adapt to different slurry viscosity and solid content range, and has stronger adaptability compared with transfer coating process. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to judge the quality of lithium iron batteries?