Why is a plasma treatment machine needed before dispensing automotive lithium batteries? The plasma cleaning machine can be used for pre-treatment of battery welding, cleaning the end face of the pole, improving welding performance, enhancing adhesive or coating adhesion, and cleaning the battery casing??

What are the advantages of plasma surface treatment for lithium battery treatment before plasma processing machines are widely used? Today, let the engineers from Zhenyi Corporation analyze it for you.

Similarly, as surface treatments, the purpose of plasma treatment and corona surface treatment is to improve the adhesion of material surfaces. Before the bonding and printing process, the use of plasma treatment can improve the adhesion of most plastic film materials. Due to the relatively low surface tension of plastic film, it also leads to the inability to firmly adhere to the surface during printing or adhesive bonding, which can cause the chemical chains of its molecules to break, increase surface roughness, and thus process. However, it has great limitations and is suitable for very thin materials.

Can low-temperature plasma treatment machines enable high-energy plasma particles to act on material surfaces, undergo physical and chemical reactions, activate, corrode, and remove pollutants from material surfaces, and make improvements in many aspects.

Why do cars need to be cleaned with plasma before being coated with lithium batteries?

The automotive market will gradually become the first major application area for lithium batteries. In the future, with the continuous promotion of supportive policies, technological progress, changes in consumer habits, and the popularization of supporting facilities, the competition in the lithium battery industry will mainly focus on new energy vehicles. In the future, power batteries will be the engine for significant growth in the lithium-ion battery field, with power batteries and high-end digital lithium-ion batteries becoming the main growth points in the lithium-ion battery market,

Plasma surface treatment machines have various applications in lithium battery production, mainly including the following steps:

1. Plasma treatment is required before coating the electrode plates: because the positive and negative electrode plates of lithium batteries are usually coated with electrode materials on metal thin strips such as aluminum foil or copper foil, the surface of the metal thin strips may have impurities such as oil, dust, and oxides during production, storage, and transportation. By using plasma cleaning technology, these pollutants can be effectively removed, providing a clean surface for subsequent electrode material coating, enabling better bonding between the electrode material and the metal strip, improving the adhesion and stability of the coating, and reducing the risk of coating detachment.

2. Through the action of plasma, the microstructure and chemical properties of the metal strip surface can be changed, increasing the surface roughness and active sites, improving its surface wettability, and allowing the electrode slurry to be more evenly coated on the metal strip, thereby improving the quality and performance of the electrodes and enhancing the charging and discharging efficiency and energy density of the battery.

3. The cleanliness of the end face of the battery cell pole has a critical impact on the welding quality during the battery welding process. The plasma cleaning machine can rely on the "activation effect" of active ions in the plasma to remove impurities such as dirt, dust, and oxides from the end face of the battery cell pole, achieving a good clean state of the pole end face, creating favorable conditions for welding, reducing the occurrence of welding defects such as virtual welding and false welding, and improving the welding quality and reliability of the battery. Plasma cleaning equipment can perform micro roughening on the end face of the pole, increase surface roughness, and roughen the surface of the weld seam. 

This can increase the contact area between the welding material and the pole during welding, improve the firmness and conductivity of the welding, ensure good welding effect of the pole ear, and reduce the probability of battery failure due to poor welding during use.

In addition, to prevent safety accidents in lithium batteries, it is usually necessary to apply external adhesive treatment or coating insulation materials to the lithium battery cells. The plasma cleaning machine can clean the surfaces of metal materials such as insulation boards, end plates, PET films, and insulation materials to remove impurities such as oil and dust. At the same time, it roughens the surface, increases surface adhesion, and enables better adhesion or coating of adhesive or insulation materials on the surface of the battery cell, playing a good insulation role, preventing short circuits, protecting the circuit, and preventing scratches.

Moreover, the battery casing may also contain pollutants such as oil and dust during the production process. Plasma cleaning machines can clean the surface of the battery casing, remove these pollutants and oxide layers, and improve surface smoothness. This not only makes the appearance of the battery more beautiful, but also improves the insulation performance and corrosion resistance of the casing to a certain extent, enhancing the overall safety and service life of the battery. 

By low-temperature plasma cleaning, the roughness of the diaphragm surface can be appropriately reduced, making the diaphragm surface smoother, reducing the internal resistance of the battery, improving the electrochemical performance of the battery, and also helping to improve the compatibility between the diaphragm and the electrode, making the overall performance of the battery more stable.

The above is the analysis of plasma cleaning machines in lithium batteries by Zhenyi Co., Ltd. If you have any further questions, please feel free to message or leave a message, and we will promptly answer your questions or call for consultation!