8. Shell seal welding and cover plate mouth welding:

The casings of power batteries are mostly made of aluminum alloy materials, and some are made of stainless steel. The aluminum alloy materials are generally 3003 aluminum alloys. Of course, it is not ruled out that pure aluminum materials are used. In terms of laser welding effects, of course stainless steel laser the welding is excellent, whether it is pulse welding or continuous welding, the welding quality is top notch.

Aluminum materials are different. Certain welding skills and equipment performance are required for specific processing. Generally, continuous laser welding machines are required for welding. Except for some pure aluminum and 3 series aluminum alloys that can be pulse welded, continuous laser is required. Only welding can solve the welding problem. As for the thickness of the shell, we need to choose a laser with a certain power. From the practical application in the industry, when the aluminum shell is below 1MM, a single-mode laser within 1000W can be used, and when it is above 1MM you need to use a 1KW single-mode or multi-mode fiber laser as its energy supply source.

The battery mentioned above is a large-capacity battery. For small-capacity battery shells, thin aluminum shells are generally used, with thicknesses generally around 0.25MM. Some also use steel shell materials, such as 18650 batteries. Due to their small size, the shell the body thickness is also thin. Low-power lasers are used for welding, but if a continuous laser is used for welding, the speed can be increased by at least about 8 times, and the welding appearance and password will be better. Therefore, if the capital is relatively loose Battery manufacturers and users who pursue quality can choose SHINHOP battery continuous laser welding machine as the primary welding equipment.

New features of laser welding lithium batteries:

From the manufacture of lithium 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. Laser welding has become the preferred solution for many welding tasks due to its advantages such as safe and reliable welding, precision technology, and environmental protection.

Advantages of battery-specific laser welding machines that are good at welding:

1 Laser welding is an integrated manufacturing process that breaks raw materials such as positive and negative electrode materials, separators, and electrolytes into whole parts. All raw materials are welded into battery cells or Pack modules, which can be directly used in the automotive field.

2 Ordinary battery raw materials account for an increasing proportion of the cost and are purchased in large quantities in tons. Laser welding equipment basically saves costs by purchasing raw materials in one go.

3. Laser welding can greatly improve the safety, reliability and service life of automobile power batteries, with high welding quality and high degree of automation.

4. Laser welding has high energy density, small welding deformation and small heat-affected zone, which can effectively improve the accuracy of parts. The welding seam is smooth, free of impurities, uniform and dense, and does not require additional grinding work.

5. Laser welding can be precisely controlled, with a small focused light spot and high-precision positioning. It is easy to realize automation with a robotic arm. The equipment performance is stable and easy to operate, which improves welding efficiency, reduces working hours and reduces costs.

6. When laser welding thin plates or thin-diameter wires, it is not as susceptible to melt back as arc welding.