Comparison of different system technologies for continuous-wave laser beam welding of copper

Punzel, Eric; Hugger, Florian; Dörringer, Robert; Dinkelbach, Thorm Lembit; Bürger, A.

doi:10.1016/j.procir.2020.09.081

Cited by 34 publications

(11 citation statements)

References 11 publications

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“…They achieved bonds in a wide range of conditions, welding speed from 5 m/min to 15 m/min, 400N pressure and laser power from 3 kW to 6 kW [3]. Eric Punzel and his team investigated different system technologies for continuous laser beam welding [4]. Martin Ruthandi Maina and his team's study two wavelengths of 532 nm and 1064 nm laser welded bonds were examined.…”

Section: Literature Of Laser Beam Welding Technologymentioning

confidence: 99%

Experiment of lithium ion accumulator cells welding with diode laser

Kovács

Hareancz

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Accumulator cells have an important role in today’s industry. It produces a need to connect them, and there are several ways to make the bonds. We examined in this experiment already made resistance projection welded bonds, and we created laser beam welded bonds with various geometries. We tried to find out, which geometry produces the greatest bonds and which parameters will be the best solution.

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Section: Literature Of Laser Beam Welding Technologymentioning

confidence: 99%

Experiment of lithium ion accumulator cells welding with diode laser

Kovács

Hareancz

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Efforts have been made to reduce the thermal effects by creating keyholes in the materials or by using pulsed beams to increase energy absorption) [1][2][3][20][21]. Other means of enhancing absorption include laser wobbling or oscillation; in some cases, bonding has employed a brazing technique [1][2][3][4][5][6]12]. Recently, green lasers, the energies of which are well-absorbed by Cu, have been developed.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, green lasers, the energies of which are well-absorbed by Cu, have been developed. Both heat conduction and keyhole welding are possible, because the laser energy absorption of Cu is about 40% at room temperature [5][6]20]. Also, welding quality is not affected by the nature of the Cu surface (electropolished, sanded, or a simple plate), and is thus highly reproducible.…”

Section: Introductionmentioning

confidence: 99%

Characterization of dissimilar aluminum-copper material joining by controlled dual laser beam

Choi

2021

Int J Adv Manuf Technol

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Laser technology has many advantages in welding for the manufacture of EV battery packs. Aluminum (Al) and copper (Cu) are welded using a dual laser beam, suggesting the optimum power distribution for the core and ring beams. Due to the very high re ectance of Cu and Al exposed to near-infrared lasers, the material absorbs a very small amount of energy. Compared to single beam laser welding, dual beam welding has signi cantly improved surface quality by controlling surface solidi cation. The study focused on the quality of weld surface beads, weld properties and tensile strength by varying the output ratio of the core beam to the ring beam. Optimal conditions of Al6061 were a 700 W core beam, a 500 W ring beam and 200 mm/s of weld speed. For the C1020P, the optimum conditions were a center beam of 2500 W, a ring beam of 3000 W and a welding speed of 200 mm/s. In laser lap welding of Al-Al and Al-Cu, the bead width and the interfacial bead width of the joint increased as the output increased. The penetration depth did not change signi cantly, but small pores were formed at the interface of the junction. Tensile tests were performed to demonstrate the reliability of the weld zone, and computer simulations provided analysis of the heat distribution for optimal heat input conditions.

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“…In laser micro welding, spatial power modulation (PM) describes the superposition of the linear feed motion with an oscillating motion. This makes the one-dimensional movement of conventional laser beam micro welding two-dimensional and allows both processing wider weld seams as well as a more stable process without pore or crack formation [6][7][8][9]. Additional parameters in the welding process, such as oscillation amplitude, allow further degrees of freedom in the design of the weld seam width [10,11].…”

Section: Introductionmentioning

confidence: 99%

High-Precision Adjustment of Welding Depth during Laser Micro Welding of Copper Using Superpositioned Spatial and Temporal Power Modulation

Hummel

Häusler

Gillner

2021

JMMP

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For joining metallic materials for battery applications such as copper and stainless steel, laser beam micro welding with beam sources in the near-infrared range has become established in recent years. In laser beam micro welding, spatial power modulation describes the superposition of the linear feed motion with an oscillating motion. This modulation method serves to widen the cross-section of the weld seam as well as to increase the process stability. Temporal power modulation refers to the controlled modulation of the laser power over time during the welding process. In this paper, the superposition of both temporal and spatial power modulation methods is presented, which enables a variable control of the weld penetration depth. Three weld geometries transverse to the feed direction are part of this investigation: the compensation of the weld penetration depth due to the asymmetric path movement during spatial power modulation only, a W-shaped weld profile, and a V-shaped. The weld geometries are investigated by the bed on plate weld tests with CuSn6. Furthermore, the use of combined power modulation for welding tests in butt joint configuration between CuSn6 and stainless steel 1.4301 with different material properties is investigated. The study shows the possibility of precise control of the welding depth by this methodology. Depending on the material combination, the desired regions with maximum and minimum welding depth can be achieved by the control of local and temporal power modulation on the material surface.

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Comparison of different system technologies for continuous-wave laser beam welding of copper

Cited by 34 publications

References 11 publications

Experiment of lithium ion accumulator cells welding with diode laser

Experiment of lithium ion accumulator cells welding with diode laser

Characterization of dissimilar aluminum-copper material joining by controlled dual laser beam

High-Precision Adjustment of Welding Depth during Laser Micro Welding of Copper Using Superpositioned Spatial and Temporal Power Modulation

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