Welding Technology: A brief of Laser welding and Laser composite welding machine

Battery components are intricate and need a technology that is particularly useful, which offers the ability to weld these battery components. This article has been articulated to know the basics of laser welding and laser composite welding machine which are the complete solutions for the battery industry.

Laser welding

Laser welding is a technology commonly used in the battery industry. It is used to join the components of a battery together and create a strong, sealed bond that is durable and reliable. This welding technique offers a number of advantages over traditional welding methods, such as higher energy efficiency, smaller weld area, and faster welding speeds. It is also capable of welding different materials together, such as metals and plastics, which is particularly useful in the battery industry where there are a variety of components. Laser welding also offers the ability to weld in difficult-to-reach areas, which is especially useful when dealing with small, intricate battery components.

Laser composite welding

Laser composite welding is a relatively new welding technology that has been used in the battery technology industry. It is a form of welding that combines two different materials, usually metals, with a laser beam to form a single, homogenous joint. The laser beam is used to heat the two materials and fuse them together. This technology is used in battery technology to increase the overall strength of the battery and to create a stronger bond between the different components. It is a cost-effective method of welding and can be used in a variety of applications. Laser composite welding technology is also used in the automotive industry, aerospace industry, and medical device manufacturing.

Six laser composite welding technologies

1. High-frequency induction composite welding technology

Electromagnetic induction is a method of heating relying on eddy current resistance heat generated inside the workpiece, and the laser is a non-contact environmentally friendly heating, the heating speed is fast, can achieve accurate control of the heating zone area and depth, and especially suitable for automated material processing, has been widely used in industry.

2. Arc composite welding technology

The arc composite heat source welding method was proposed by the British scholar Steen as early as the 20s of the 80th century, but for a long time since then, scientific and technological workers have not done further research and development on it. In recent years, researchers have refocused their attention on this technology and have tried to combine the advantages of laser and arc to get the best possible match.

3. TIG composite welding

The characteristics of TIG composite welding laser and TIG composite welding are:

• The use of arc to enhance the laser effect, the low-power laser can be used instead of a high-power laser to weld metal materials;
• It can be welded at high speed when welding thin parts;
• It can increase the penetration depth, improve the weld forming, and obtain high-quality welded joints;
• It can ease the accuracy requirements of the end-face interface of the base metal.

For example, when the CO2 laser power is 0.8KW, the current of the TIG arc is 90A, and the welding speed is 2m/min, can be equivalent to the welding capacity of 5KW CO2 laser welder, 5KW CO2 laser beam and 300A TIG arc composite, welding speed 0.5~5m/min, the penetration depth obtained is 5.2~1.3 times that of CO1 laser beam welding using 6KW alone.

4. Plasma arc composite welding

Laser plasma composite adopts coaxial mode, plasma arc is generated by ring electrode, a laser beam passes through the middle of plasma arc, plasma arc mainly has two functions:

• Provide additional energy for laser welding, improve welding speed, and then improve the efficiency of the entire welding process;
• The plasma arc surrounds the laser, which can produce the effect of heat treatment, prolong the cooling time, reduce the sensitivity of hardening and residual stress, and improve the microstructure properties of the weld.

5. MIG composite welding

Studies in recent years have shown that laser-MIG composite heat source welding has obvious advantages in medium and thick plate welding. By adjusting the relative position of the arc and the laser, the welding method can effectively improve the welding adaptability, improve the adaptability to large gaps, improve the weld forming, and at the same time, the input arc energy can adjust the cooling rate, thereby improving the microstructure. Under the interaction of laser and arc, the welding process becomes more stable, and the welding speed is increased while increasing the penetration depth. When welding, the heat input is relatively small, which means that the post-weld deformation and welding residual stress is small, which can reduce the time for welding clamping, positioning, post-weld orthopedic treatment, etc. In addition, the prominent feature of this method is that it can fill the wire relatively stably so that it is easier to improve the metallurgical properties and microstructure of the weld.

6. Double laser beam welding technology

In the laser welding process, due to the high laser power density, the welding base metal is rapidly heated, melted, vaporized, and high-temperature metal vapor is generated. Under the continued action of the high-power density laser, it is easy to generate a plasma cloud, which not only reduces the absorption of the laser by the workpiece but also makes the welding process unstable. If the laser power density of continued irradiation is reduced after the formation of larger deep penetration holes, and the larger deep penetration holes that have been formed absorb more laser, the effect of laser on metal vapor is reduced, and the plasma cloud can be reduced or disappeared. Therefore, with a beam of pulse laser with higher peak power and a continuous laser, or two pulse laser with a large difference in pulse width, repetition rate, and peak power for composite welding of the workpiece, in the welding process, the two lasers irradiate the workpiece together, periodically form a large deep penetration hole, and then stop the irradiation of a laser in time, which can make the plasma cloud very small or disappear, improve the absorption and utilization of laser energy of the workpiece, increase the welding penetration, and improve the welding capacity.

Conclusion

Battery welding has been an essential technique for the battery industry. The components are co-joined with a laser beam welding process. The technique includes a laser beam that concentrates heat on the focused area for joining the two metal pieces.

About Semco?-?Established in 2006,?Semco Infratech?has secured itself as the number 1 lithium-ion battery assembling and testing solutions provider in the country. Settled in New Delhi, Semco gives turnkey solutions for lithium-ion battery assembling and precision testing with an emphasis on Research and development to foster imaginative, future-proof products for end users.