Actual case: After Volkswagen adopted laser-MIG hybrid welding technology, the efficiency of the body production line was significantly improved by 40%, while the weight of the body was reduced by 15%. This not only speeds up the production rhythm and reduces production costs, but also helps the energy conservation and emission reduction goals of automobiles, fully demonstrating the huge advantages and application value of laser hybrid welding technology in the field of automobile manufacturing.

From the manufacture of energy storage battery cells to the assembly of battery PACKs, welding is a very important manufacturing process. The conductivity, strength, air tightness, metal fatigue and corrosion resistance of lithium batteries are typical battery welding quality evaluation standards. The selection of welding methods and welding processes will directly affect the cost, quality, safety and consistency of the battery.

Fiber laser is a laser that uses optical fiber to amplify and transmit the generated excitation light, and has a wavelength of 1070nm that is easily absorbed by metals. Among many lasers, it has a particularly high energy density and has the characteristics of easy convergence of the beam, and its major advantage is that it can achieve deep melting of metals. Compared with YAG laser, it has many advantages such as deep melting, low running cost, and almost no trouble and cost for adjustment and maintenance, and its popularity has accelerated in recent years. Although fiber laser has the characteristics of high power and high efficiency, if the power is too high in manual welding of sheet metal, it will cause danger to the operator, so the power is usually limited to about 1kW when making products. When pursuing higher power and greater penetration depth, mechanical welding and robot welding can be studied.

Application background Laser oscillating welding technology was born out of the urgent need for welding quality and efficiency in modern manufacturing. Traditional welding technology has deficiencies in precision, strength and complex structure, which has prompted the rapid application of laser welding in various fields. However, it still has defects such as pores and cracks, and has limitations in welding dissimilar materials and complex-shaped parts. It is difficult to meet the stringent requirements of high-end fields such as aerospace and automobile manufacturing, affecting product quality, safety, production efficiency, etc., and increasing the manufacturing cost of enterprises. Against this background, laser oscillating welding technology came into being.