The welding technology involved in the battery manufacturing process is very extensive. The reasonable selection of welding methods and processes directly affects the production cost, quality reliability and safety of the battery.

As a very important process link in battery production, laser welding has a great impact on the consistency, stability and safety of the battery. There are many laser welding parts for power batteries, the process is difficult, and the welding process requirements are higher. Through efficient and precise laser welding, the safety, reliability and service life of automotive power batteries can be greatly improved, which will surely provide an important guarantee for the development of automotive power technology in the future.

In short, for power battery manufacturers, laser welding is an integrated manufacturing process that integrates positive and negative electrode materials, diaphragms, electrolytes and other raw materials into a whole, and is a key process in the entire power battery production process. All raw materials are welded into battery cells and PACK modules, which can be directly used in traditional consumer electronics, electronic tools, electric bicycles, energy storage power stations and new energy vehicles.

Generally, the thickness of the casing is required to be less than 1.0 mm. Mainstream manufacturers currently have two methods for the thickness of the casing material, 0.6 mm and 0.8 mm, according to the battery capacity. The welding methods are mainly divided into side welding and top welding. The main advantage of side welding is that the impact on the inside of the cell is small, and the spatter will not easily enter the inside of the shell cover.

Since it may cause bulges after welding, which will have a slight impact on the assembly of the subsequent process, the side welding process has higher requirements on the stability of the laser, the cleanliness of the material and the matching gap between the top cover and the shell, while Since the top welding process is welded on one surface, a more efficient galvanometer scanning welding method can be used.

At present, aluminum shell batteries account for more than 90% of the entire power battery. Laser welding of aluminum materials is difficult, and it will face the problem of welding surface bumps, pores, and internal bubbles. Surface bumps, pores, and internal bubbles are fatal to laser welding. Injuries, many applications have to stop or find ways to avoid them due to these reasons. Many battery manufacturers will be troubled by this in the early stage of research and development. The main reason is that the core diameter of the optical fiber used is too small or the laser energy setting is too high; in the welding of power batteries, the welding process technicians Material, shape, thickness, tension requirements, etc., select appropriate laser and welding process parameters, including welding speed, waveform, peak value, welding head inclination angle, etc. to set reasonable welding process parameters to ensure that the final welding effect meets the power battery manufacturer. requirements.

There are many laser welding parts for power batteries, and there are requirements for withstand voltage and night leakage tests. Most of the materials are aluminum. Because of the difficulty of welding, the requirements for welding technology are higher. The precision laser welding machine of HGLASER can greatly improve the safety of automobile power batteries. The durability and service life will bring revolutionary progress to the future automotive power technology.