China's first automated production line for lithium-ion battery dry electrodes

Overview
By the end of 2024, TSINGYANAK completed the construction of China's first automated production line for lithium-ion battery dry electrodes in Longgang, Shenzhen. This production line is capable of realizing a fully automated process from automatic material conveying to film-forming and compounding. The working pressure, rolling precision and uniformity of the rolling equipment are all at the industry-leading level. Compared with wet electrodes, the dry electrode process eliminates the slurry preparation, coating and drying procedures of the wet method. As a result, the length of the production line can be reduced by 70%, while the production cycle is significantly shortened, and the environmental protection costs and equipment costs are lowered.

Material system
Anode: artificial graphite, natural graphite, silicon-carbon anode, graphite + silicon-carbon doping, etc.
Cathode: polycrystal, single crystal, ternary + sulfide doping
Ternary:
Lithium iron phosphate: agglomerates, nano-powders
Nadian: polyanions, Prussian white, hard carbon, etc.
Other materials: electrolyte membranes, aqueous batteries, primary lithium batteries, etc.

Three core links

Fully automatic mixing

The mixing process involves the thorough mixing, dispersing, and fibration of active substances, binders, and conductive agents. The Qingyan Nake fully automatic mixing system includes a fully automated process of automatic powder suction, weighing and metering, mixing and homogenization, iron removal and filtration, and positive pressure conveying to the film forming machine.
Double-sided film formation

The equipment has 10 rolls with a roll width of 500mm and a maximum film-forming width of 400mm. The thickness precision is controlled within ±2μm, and the mechanical speed is 50m/min. It is equipped with superimposed servo hydraulic roll gap control, which can detect the roll gap and pressure in real-time to ensure continuous and stable film formation.
Double-sided simultaneous lamination

After film formation, the electrode sheets are thinned to the specified thickness through multiple hot-pressing processes to increase the compaction density. They are simultaneously laminated with the current collector on both sides, resulting in high production efficiency. At the same time, double-sided surface density detection is carried out to ensure the quality of the electrode sheets.
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Email：marketing@tsingyane.com