Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Laser Welding Characteristics of Aluminum and Copper Sheets for Lithium-ion Batteries

자동차 이차전지 제조를 위한 알루미늄과 무산소동의 레이저 용접특성

  • Kang, Minjung (Advanced Welding and Joining R&D group, Korea Institute of Industrial Technology) ;
  • Park, Taesoon (Advanced Welding and Joining R&D group, Korea Institute of Industrial Technology) ;
  • Kim, Cheolhee (Advanced Welding and Joining R&D group, Korea Institute of Industrial Technology) ;
  • Kim, Jeonghan (Korea Ppuri Industry Center, Korea Institute of Industrial Technology)
  • 강민정 (한국생산기술연구원 용접접합연구그룹) ;
  • 박태순 (한국생산기술연구원 용접접합연구그룹) ;
  • 김철희 (한국생산기술연구원 용접접합연구그룹) ;
  • 김정한 (한국생산기술연구원 뿌리산업진흥본부)
  • Received : 2013.10.16
  • Accepted : 2013.12.19
  • Published : 2013.12.31
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Abstract

Several joining methods involving resistance welding, laser welding, ultrasonic welding and mechanical joining are currently applied in manufacturing lithium-ion batteries. Cu and Al alloys are used for tab and bus bar materials, and laser welding characteristics for these alloys were investigated with similar and dissimilar material combinations in this study. The base materials used were Al 1050 and oxygen-free Cu 1020P alloys, and a disk laser was used with a continuous wave mode. In bead-on-plate welding of both alloys, the joint strength was higher than the strength of O tempered base material. In overlap welding, the effect of welding parameters on the tensile shear strength and bead shape was evaluated. Tensile shear strength of overlap welded joint was affected by interfacial bead width and weld defect formation. The tensile-shear specimen was fractured at the heat affected zone by selecting proper laser welding parameters.

Keywords

References

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