As we all know, the cost of new energy vehicles is still high, and the cost of power batteries is a big part. The laser welding on the battery is promising because of the many welding parts and the considerable process difficulty. Laser welding is a very important process in the production of power batteries, which directly determines the consistency, stability and safety of the battery.
Compared with the traditional welding method, the advantages of laser pointer welding are small loss of welding consumables, stable and easy operation of equipment, high welding quality and high degree of automation.
In addition to battery manufacturing, motor technology is a very important part of the new energy automotive industry, and laser technology can be widely used. Since the motor manufacturing requires high welding strength, small heat affected zone and high precision for the welded parts, the advantages of laser welding are obvious compared with the conventional welding methods. For example, when the rotor shaft of the motor and the ring weld before the pressure ring are generally CO2 gas shielded or tungsten argon arc welded, the welding will have a large deformation, and the heat generated by the welding will affect the magnetic steel in the motor body. The method of laser welding uses high energy concentration, high density, high heating efficiency and high speed. Therefore, the deformation of the welded parts is small, and the metal in the non-melting zone is less affected by heat, which is superior to other welding methods.
Laser pointer industrialization started relatively late. Early domestic fiber lasers were almost all imported from overseas. IPG fiber lasers once occupied more than 80% of the domestic market. In recent years, fiber laser technology has developed rapidly. The annual growth rate of fiber lasers exceeds 35%, which is much higher than the growth rate of 7%-9% of global industrial lasers. Fiber lasers are gradually encroaching on the market share of solid and carbon dioxide lasers due to their innate advantages, and fiber lasers are gradually opening up new applications.