18650 lithium battery 3000mah coating process, lithium ion battery coating method

　　18650 lithium battery 3000mah coating process, lithium-ion battery coating method. Currently, the main coating methods for lithium-ion battery electrodes include comma roller transfer coating and slit extrusion coating. Whether the coating can accurately use the best coating and drying processes during the design process and balance the relationship between the two ultimately affects the overall technical performance of the coating.

　　18650 lithium battery 3000mah coating process

　　Coating is the next process of coating the slurry after the preparation of the slurry. The main purpose of this process is to evenly coat the slurry with good stability, good adhesion and good fluidity on the positive and negative electrode current collectors. .

　　The drying process and coating process of lithium-ion battery pole pieces are independent but related to each other; the nature of the coating affects the design and operation of the drying process; the coating speed and the thickness of the coating determine the drying length; during the drying process, the coating There is a leveling process, which affects the uniformity of the coating.

　　The operation method of double-sided coating of lithium batteries is applicable to most coating machines. This is also one of the necessary skills for 18650 lithium battery 3000mah coating machine operators. In fact, why coating double-sided lithium batteries is mainly to improve the energy of the finished battery Density means making the battery capacity larger, but these are all closely related to 18650 lithium battery 3000mah coating materials and 18650 lithium battery 3000mah coating slurries, formulas, processes, and coating machines.

　　Pole piece coating generally refers to a process in which a uniformly stirred slurry is evenly coated on the current collector and the organic solvent in the slurry is dried. The coating effect has an important impact on the capacity, internal resistance, cycle life and safety of lithium batteries, ensuring that the pole pieces are evenly coated.

　　Lithium-ion battery coating method

　　The coating machine is a key process equipment for the production of power 18650 lithium battery 3000mah pole pieces. At present, the coating processes for 18650 lithium battery 3000mah pole pieces mainly include scraper type, roller transfer type and slit extrusion type. I have been exposed to all three coating methods during my work. Generally, laboratory equipment adopts the scraper type, 3C batteries adopt the roller coating transfer type, and power batteries mostly adopt the slit extrusion type.

　　①Blade coating

　　Scraper type Main comma scraper. The comma scraper is one of the key components of the coating head. It is generally processed into a comma-like cutting edge on the surface of the round roller along the bus line. This scraper has high strength and hardness, and is easy to control the coating amount and coating accuracy. It is suitable for High solid content and high viscosity slurry.

　　②Roller transfer type

　　The rotation of the coating roller drives the slurry, and the amount of slurry transfer is adjusted through the comma scraper gap. The rotation of the back roller and the coating roller is used to transfer the slurry to the substrate. The rotation of the coating roller drives the slurry through the metering roller gap to form a certain Thickness of slurry layer.

　　③Slit extrusion coating

　　Compared with other coating methods, slot extrusion coating has many advantages, such as fast coating speed, high precision, and uniform wet thickness; the coating system is closed to prevent contaminants from entering during the coating process, and the slurry utilization rate is high. High, it can keep the properties of the slurry stable and can carry out multi-layer coating at the same time. It can adapt to different slurry viscosity and solid content ranges, and has stronger adaptability than the transfer coating process.

　　The above is the 18650 lithium battery 3000mah coating process and lithium-ion battery coating method. Pole piece coating is of great significance to the capacity, consistency, and safety of lithium batteries.

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