Solution

Lithium battery industry

What are the problems in the use of lithium battery production equipment?
Corrosion and wear in lithium battery production equipment are serious problems that endanger their production. Two inevitable problems are: the hybrid and dispersing equipment is abraded by materials during the production process, which may directly lead to functional damage of the equipment, making it unable to operate normally, the equipment life is reduced, and corrosion may also damage the equipment structure, causing its strength and stability to be seriously affected. In addition, the equipment will constantly contact and rub when the materials are mixed and dispersed, and the frictional area is prone to wear. Abrasion will not only reduce the service life of the equipment, but also may produce metal particles. These particles will enter the stirring material and cause contamination to the lithium battery.

Common solutions for the lithium battery industry:

① Surface chrome plating (although it can play a corrosion-resistant role, the coating is very thin, wear resistance is poor, and the cost is high, which is easy to cause environmental pollution)
② Electrostatic spraying Teflon (the advantages are low cost and simple processing technology, but Teflon has poor wear resistance and high temperature resistance, short service life, harmful substances will be generated during the spraying process, polluting the environment)
③ Inlaid stainless steel or ceramic lining (although stainless steel materials have good corrosion resistance, they have low hardness and poor wear resistance. The worn matrix materials such as Fe and other metals enter the stirred raw materials, which are easy to contaminate the raw materials; ceramic linings not only increase costs but also increase manufacturing difficulty)
④ Surface nitriding or carburizing (although the parts after nitriding have high hardness, high wear resistance and high fatigue strength, they are just a thin layer on the surface and have a high temperature, which will cause the workpiece to deform)
⑤ Thermal spraying on the surface (advantages: the substrate material does not produce stress or deformation during the spraying process; the surface hardness after thermal spraying is higher, more wear-resistant and corrosion-resistant, and its life is more than 10 times that of stainless steel, thereby extending the service life of the equipment. At the same time, the friction process will not drop metal elements such as iron and nickel, which can effectively improve the purity of the product, reduce the battery self-discharge ratio, and effectively improve the performance of the battery)

Solution:

Our company uses supersonic tungsten carbide spraying and uses automatic robotic arms to ensure that the surface coating of the equipment is even and not easy to fall off. After the overall surface of lithium battery equipment is treated with tungsten carbide, the surface hardness and wear resistance of the equipment have been qualitatively improved, which not only reduces the loss of the equipment, but also effectively prevents iron and nickel from entering the raw materials and effectively reduces the battery's self-discharge ratio. Jiangsu Fuxin Precision has strong thermal spraying technology and rich processing experience. Customers are welcome to call for consultation.
Spraying tungsten carbide coating can enable the workpiece to obtain good characteristics that are not available in substrates such as wear-resistant, corrosion-resistant, heat-resistant, insulation, surface reinforcement, high-temperature ablation, high-temperature adhesion and damage to workpieces, extending the service life of the workpiece and improving the application performance of the body. The inside of the tank of the lithium battery powder double cone spiral mixer and all parts of the double cone spiral mixer and the contact between the double helix and the material are sprayed to prepare a carbide coating. This is because metal impurities in the battery material will cause self-discharge, peel through the diaphragm, resulting in micro-short circuits. The preparation of tungsten carbide coating for lithium battery equipment greatly reduces the wear rate of workpieces, greatly reduces impurities in the material, and ensures the purity of the battery powder.