In the battery manufacturing industry, battery performance depends on the quality of the connection between the cell and the electrode ear. Many welding processes are applied for this purpose, such as laser welding, resistance welding, ultrasonic welding and so on. In addition to the requirements of welding process, the quality of weld joints is also affected by the cleanliness of parts. Contaminants that may exist on the surface of the positive and negative electrodes, including oil, corrosion inhibitors, oxides and other compounds in the process will lead to poor welding joints, cracks and gaps. The solution is to clean the surface before welding, which is also an important application of rust laser cleaning machine in the battery industry.

There are two methods for cleaning battery surface: medium blasting cleaning and laser cleaning.

Medium blasting cleaning includes sand blasting or dry ice blasting cleaning. The working principle is to use abrasive directly to tear the surface of pollutants. The cleaning process is undeniably efficient, but it creates micro-grooves on the surface that affects the strength and appearance of the welding. In contrast, handheld laser cleaner does not damage the surface and can effectively clean the surface of the contaminant, thus improving the overall welding process.

Laser cleaning is to focus the laser beam on the surface of the substrate, so as to remove the surface of the material. This process is also called ablation. The amount of material removed depends on the laser length, pulse width and wavelength. It is also related to the properties of the material itself, including its ability to absorb laser light and the energy required to break chemical bonds.

Reliable and cost effective laser cleaner can quickly and cleanly remove contaminants on the surface of the substrate,which reduces subsequent treatment. Compared with the traditional media blasting cleaning, the laser cleaning process is about 15 times faster, greatly reducing the cleaning time, improving the production efficiency and saving the manufacturing cost.