Core Applications of Coaters in the Manufacture of New Energy Battery Electrodes
Time：
2025-12-15 10:30
In the modern new energy industry, especially in the field of lithium-ion battery manufacturing, coaters play a vital role. A high-precision coater production line serves as the core equipment for manufacturing high-performance battery electrode sheets, and its process level directly determines the energy density, cycle life and safety of the battery. By uniformly and stably coating the slurry containing active materials, conductive agents and binders on the metal foil current collector, the coater lays a solid foundation for the "heart" of the battery.
The primary task of the coater in electrode manufacturing is to ensure a high degree of consistency in electrode sheet performance. Whether it is the positive electrode such as lithium iron phosphate and ternary materials, or the negative electrode such as graphite and silicon-carbon composite materials, the thickness, areal density and uniformity of slurry coating must be precisely controlled. Advanced coater production lines integrate high-precision die heads, intelligent closed-loop tension control systems and online real-time thickness gauges, enabling micron-level coating accuracy. This effectively avoids problems such as cracking, wrinkling or uneven thickness that may occur in the coating during the subsequent drying process, thereby ensuring that each electrode has uniform electrochemical activity, which is the fundamental way to improve the overall battery performance and batch stability.
With the rapid iteration of battery technology, higher requirements have been put forward for the process adaptability and innovation of coaters. Faced with application challenges such as high-solid-content slurry, new conductive agents (e.g., carbon nanotubes) and ultra-thin foil materials, modern coaters demonstrate strong technical flexibility. By flexibly adjusting different coating methods such as slot die extrusion and transfer coating, and accurately matching the temperature and air flow curve of the drying zone, coaters can adapt to diverse material systems and process requirements. This not only serves the large-scale production of current mainstream liquid lithium batteries, but also provides a reliable and advanced process platform for the electrode trial production and manufacturing of new energy storage technologies such as solid-state batteries and sodium-ion batteries oriented to the future. Therefore, investing in a high-performance and high-stability coater production line is a key strategic measure for battery manufacturers to build core competitiveness.
Sumino Heavy Machinery Industry (Nanjing) Co., LTD.
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