Application Solution of Fiber Laser Welding in New Energy Industry

With the reduction of non-renewable energy and the emergence of the concept of new energy, new energy technology is constantly being applied in various industries, especially in the field of automobiles that consume the most oil. It is urgent to use new energy to replace oil energy. Among them, the power battery, as the core component of the new energy vehicle, directly determines the performance of the whole vehicle. The accuracy and automation level of the production equipment will directly affect the quality, efficiency and consistency of the battery. Therefore, the laser welding machine of the new energy battery has become the new favorite of the power battery industry.

Laser welding is an efficient and precise welding method using high energy density laser beam as heat source. Laser welding is one of the important aspects of the application of laser material processing technology. The welding process belongs to the heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat is guided to the internal diffusion through the heat transfer. By controlling the parameters such as the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool.

So, what are the advantages of the application solution of fiber laser welding in the new energy industry? Lixing laser technical engineer will answer for you. New energy buses and cars have been applied to real life. The high-tech part of new energy vehicles is power batteries. In order to ensure the stability and sustainable use of new energy batteries, laser welding has become an inevitable choice in the field of power batteries. Laser welding machine is mainly used for welding the connecting piece of power battery module.

The cell of the power battery in the new energy field follows the principle of “portability”. The material used is thin aluminum alloy. The shell, cover and bottom of the battery are basically required to be less than 1.0 mm. At present, the basic material thickness of mainstream manufacturers is about 0.8 mm. Laser welding meets the requirements of welding ultra-thin power cells.

The application of laser welding to power battery welding is to use high-energy laser pulse to locally heat the power battery in a small area. The energy radiated by the laser is directed to the internal diffusion of the material through heat transfer, and the material is melted to form a specific molten pool. It can realize spot welding, butt welding, overlap welding, seal welding, etc., with high depth ratio, small weld width, small heat affected zone, small deformation, fast welding speed, smooth and beautiful weld. The power battery and other products after welding need no treatment or simple treatment, high weld quality, no air hole, controllable, small focus point, high positioning accuracy, and easy to realize automation.

Advantages of power battery laser welding products: fast speed, large depth, small deformation; It can be welded at room temperature or under special conditions, and the welding equipment is simple. For example, when a laser passes through an electromagnetic field, the beam will not shift; Laser can weld in vacuum, air and certain gas environment, and can weld through glass or materials transparent to the beam. It can weld refractory materials such as titanium and quartz, and can weld dissimilar materials with good results.

Laser welding has high power density. When welding high power devices, the aspect ratio can reach 5:1 and the height can reach 10:1; Micro welding is available. After focusing, the laser beam can obtain a very small spot and can be positioned, which can be applied to the assembly and welding of micro and small workpieces in mass automatic production. The inaccessible parts can be welded, and the non-contact long-distance welding has great flexibility. The laser beam is easy to realize beam splitting according to time and space, and can carry out multi-beam simultaneous processing and multi-station processing, providing conditions for more precise welding.

About HGSTAR: HGSTAR is the pioneer and leader of laser industrial application in China, and the authoritative provider of global laser processing solutions. We have comprehensively arranged laser intelligent machine, measurement and automation production lines, and smart factory construction to provide overall solutions for intelligent manufacturing.

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