Energy storage welding copper sheet
The dissimilar material connection at the negative terminal was realized in overlap configuration with copper as the upper joining partner (Fig. 2). Below the DC04 steel a polymer layer is used to insulate both terminals and seal the battery can. Furthermore the polymer layer holds the positive terminal in place.
Due to the high reflectivity (R = 97%,of copper for laser beam radiation with a wavelength of 1070 nm high intensity is needed to create a stable keyhole welding process.
Due to the material combination CuSn6 on DC04 and the process requirements (seam width, weld depth) simple weld strategies are not sufficient to reach high process.
The experimental setup consisted of a 400 W single mode fiber laser and a 3D axis gantry to position the laser scanning head. Adapted to the scanning head was a.
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6 FAQs about [Energy storage welding copper sheet]
How are copper and aluminium sheets welded?
The copper and aluminium sheets are placed in a clamping device that guarantees a reproducible and gapless positioning in overlap configuration. The welding zone is flooded with argon as shielding gas (~ 30 l/min). The probes are cleaned with ethanol before welding.
Can a battery can be welded to a copper sheet?
As a stable welding connection of a 1.5 mm thick copper sheet (Cu-OF) to a 0.3 mm thick metal part (DC04, battery can) is not possible, but necessary, to reach the desired conducting cross-section of A = 50 mm 2, welding of a thin copper sheet (0.2 mm thickness, CuSn6) is used as the direct connection to the battery can.
What are the overlap welding strategies for copper-aluminum welds?
Overlap welding strategies for copper-aluminum welds used in the experimental investigation: linear stitched weld ( a ), circular beam oscillation ( b ), and vertical eight beam oscillation ( c ). The linear stitched weld is characterized by single lines of l = 3 mm length.
What is the line energy range for proper welding parameters?
In sum, the line energy range for proper welding parameters was found larger for the circular beam oscillation for a degree of overlap of U ≈ 20% compared to the linear stitched weld. For E L = 2.1 J/mm, a controlled intermixing of copper and aluminum with distinct penetration depth was still achieved.
What is the wavelength of laser micro welding of copper?
New approaches on laser micro welding of copper by using a laser beam source with a wavelength of 450 nm. J. Adv. Join. Process. 2020, 1, 100012. [ Google Scholar] [ CrossRef] Kaufmann, F.; Maier, A.; Ermer, J.; Roth, S.; Schmidt, M. Influence of defocusing in deep penetration welding of copper by using visible wavelength.
Does laser microwelding improve quality of copper welds?
Haeusler A, Schuermann A, Schoeler C et al (2017) Quality improvement of copper welds by laser microwelding with the usage of spatial power modulation. Journal of Laser Applications 29 Schmitt F (2012) Laserstrahl-Mikroschweißen mit Strahlquellen hoher Brillanz und örtlicher Leis-tungsmodulation. Dissertation, RWTH Aachen, Shaker, Aachen Germany