Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Welding Strength in the Ultrasonic Welding of Multi-layer Metal Sheets for Lithium-Ion Batteries

리튬이온 배터리용 다층박판 금속의 초음파 용착시 용착강도

  • Kim, Jin-Bom (Department of Mechanical Engineering, Graduate School, Incheon National University) ;
  • Seo, Ji-Won (Department of Mechanical Engineering, Graduate School, Incheon National University) ;
  • Park, Dong-Sam (Department of Mechanical Engineering, Incheon National University)
  • 김진범 (인천대학교 대학원 기계공학과) ;
  • 서지원 (인천대학교 대학원 기계공학과) ;
  • 박동삼 (인천대학교 기계공학과)
  • Received : 2021.04.12
  • Accepted : 2021.04.26
  • Published : 2021.06.30
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Abstract

As a significant technology in the smartization era promoted by the Fourth Industrial Revolution, the secondary battery industry has recently attracted significant attention. The demand for lithium-ion batteries (LIBs), which exhibit excellent performance, is considerably increasing in different industrial fields. During the manufacturing process of LIBs, it is necessary to join the cathode and anode sheets with thicknesses of several tens of micrometers to lead taps of the cathode and anode with thicknesses of several hundreds of micrometers. Ultrasonic welding exhibits excellent bonding when bonded with very thin plates, such as negative and positive electrodes of LIBs, and dissimilar and highly conductive materials. In addition, ultrasonic welding has a small heat-affected zone. In LIBs, Cu is mainly used as the negative electrode sheet, whereas Cu or Ni is used as the negative electrode tab. In this study, one or two electrode sheets (t0.025 mm Cu) were welded to one lead tab (t0.1 mm Cu). The welding energy and pressure were used as welding parameters to determine the welding strength of the interface between two or three welded materials. Finally, the effects of these welding parameters on the welding strength were investigated.

Keywords

Acknowledgement

이 논문은 인천대학교 2019년도 자체연구비 지원에 의하여 연구되었음

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