CAN LASER BEAM WELDING IMPROVE POROSITY FREE WELDS

Energy storage laser sealing welding

This article aims to deeply explore the high-end application of laser welding technology in energy storage cell manufacturing and particularly focus on the cutting-edge innovation of the annular laser spot effect and its profound influence on future development.
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FAQS about Energy storage laser sealing welding

What is laser welding?

Laser welding is a newer technology, introduced in the manufacturing marketplace in the mid-1980s. As laser technology has matured, and the awareness of its benefits spread, it has become an established process. Today it is simply another tool in the manufacturing engineer’s toolbox to be used and implemented as needed.

Is laser welding a good method for seam sealing?

Laser welding is an excellent method for seam sealing, resulting in high speed, high quality seams in both steel and aluminum. Laser welding offers significant advantages over mechanical clinching and adhesive methods based on joint reliability, joining speed, and ease of manufacturing.

Can a laser weld a tab to terminal?

Due to a different welding mechanism, laser welding is able to weld both thin and thick tab materials, with a capability of welding copper or aluminum tab material above and beyond 0.04-inch thickness. Avoiding penetration of the can and overheating the battery are important aspects of tab to terminal welding.

Can You weld aluminum cans with laser welding?

As laser welding is an extremely efficient joining process, the heat input into the battery is minimized. Figure 1 shows a few examples of seam welding of aluminum cans, including a weld cross section, and ball and plug sealing application examples.

Why is laser welding better than mechanical clinching?

Laser welding offers significant advantages over mechanical clinching and adhesive methods based on joint reliability, joining speed, and ease of manufacturing. As laser welding is an extremely efficient joining process, the heat input into the battery is minimized.

What are the different types of laser welding?

There are two types of laser that provide solutions for battery applications: pulsed Nd:YAG and fiber. Both of these lasers offer different joining characteristics that can be selected as appropriate. Laser welding is an excellent method for seam sealing, resulting in high speed, high quality seams in both steel and aluminum.

Energy storage power supply laser welding

In the complex manufacturing process of energy storage cells, laser welding technology, with its unique advantages, has become the key process for connecting various components of the cells and ensuring battery performance and safety.
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The significance of double pulse of energy storage spot welding machine

Compared to single pulse resistance spot welding (RSW), the double pulse welding with a higher secondary current led to an enhancement in tensile-shear strength and a desirable failure mode, while a medium level value improved cross-tensile strength and ductility ratio.
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FAQS about The significance of double pulse of energy storage spot welding machine

What is a double pulse Weld?

Double-pulse welding schedule was employed in the process. Under the second pulse current, the central temperature in the weld was higher than Ac3, and the second nugget was formed. The weld including two nuggets with different size and same center was obtained under the optimized process.

What are the mechanical properties of double pulse welding?

The double pulse welding using highest secondary current led to the best mechanical properties with peak load of 31.59 kN and energy absorption of 30.28 J. The failure mode was gradually transformed from IF to PT-PP, which is discussed in the following sections. Fig. 13.

What is a double pulse welding schedule?

For the double-pulse welding schedule, the first stage current was the same as the current of single-pulse schedule. To insure the nugget with same size, enough cooling time between the two pulses was necessary. Different welding joints were obtained by changing the second pulse current. The resistance spot welding parameters were shown in Table 1.

Does double pulse resistance spot welding affect mechanical properties of q&p 980 steel?

In this study, the effect of double pulse resistance spot welding processes on mechanical properties and fracture process of Q&P 980 steel were explored. The following conclusions can be drawn: Q&P 980 steel was susceptible to liquation crack formation. Martensite was the predominate microstructure in the weldment.

What is the peak load and energy absorption of double pulse welding?

It can be seen that the peak load and energy absorption first remain unchanged and then increased, having the same trend with nugget diameter. The double pulse welding using highest secondary current led to the best mechanical properties with peak load of 31.59 kN and energy absorption of 30.28 J.

What is double-pulse welding process compared to dual-Nugget RSW process?

Similar to dual-nugget RSW process, double-pulse welding process were used as shown in Table 1: electrode force 4.4 kN, welding current of the 1st pulse 6.0 kA, welding time 375 ms; the current of the 2nd pulse from 2 kA to 4.5 kA, 2nd pulse time 375 ms.