Investigations on laser beam welding of thin aluminum foils with additional filler wire

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Sarah Nothdurft, Oliver Seffer, Jörg Hermsdorf, Stefan Kaierle
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引用次数: 0

Abstract

Nowadays, battery-electric drives and energy storage are elected to be the future technologies. In the manufacturing of parts for electric applications, laser beam welding is an appropriate and favorable welding method. The characteristics of high welding speed, local heat input, and the contact-free process allow efficient and automatable processes. For electrodes, mainly copper and aluminum are used. Many foils with thicknesses of an area of 10 μm have to be connected to create battery cells. Different than expected, aluminum is a more challenging material to produce than others. Pore formation is also extended in aluminum due to the presence of air between the foils. The connecting cross section is thereby reduced. Furthermore, there is detachment in the fusion area and a high weld seam undercut. In addition to insufficient clamping, a lack of material reduces strength and, thus, usability. In the research presented here, the use of aluminum filler wire (AA 1050A) and shielding gas are investigated for the application of welding 40 aluminum foils (AA 1050A) with a thickness of 15 μm to an aluminum sheet with a thickness of 2 mm using infrared laser beam wavelength. The aims of the process development are welds with high connection widths and high quality as well as reproducibility to provide excellent mechanical properties and the highest electrical conductivity.
添加填充焊丝的薄铝箔激光焊接研究
目前,电池-电力驱动和能量存储被认为是未来的技术。在电气类零件的制造中,激光焊接是一种合适而有利的焊接方法。高焊接速度,局部热输入和无接触过程的特点,使高效和自动化的过程。电极主要使用铜和铝。为了制造电池,必须连接许多厚度为10 μm的箔片。与预期不同的是,铝是一种比其他材料更具挑战性的材料。由于铝箔之间存在空气,孔隙形成也在铝中扩展。从而减小了连接截面。熔接区存在剥离现象,焊缝侧切率高。除了夹紧不足外,缺乏材料还会降低强度,从而降低可用性。本文研究了采用铝填充丝(AA 1050A)和保护气体,利用红外激光束波长将厚度为15 μm的40张铝箔(AA 1050A)焊接到厚度为2 mm的铝板上的应用。该工艺开发的目标是焊缝具有高连接宽度和高质量以及可重复性,以提供优异的机械性能和最高的导电性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.60
自引率
9.50%
发文量
125
审稿时长
>12 weeks
期刊介绍: The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.
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