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T-joint Welding Characteristics of Multi-thin Plate Dissimilar Thickness of SS41 of Automobile Battery by using Nd:YAG Laser

Nd:YAG 레이저를 이용한 자동차 배터리용 SS41 다층박판 이종두께 T형상 용접 특성

  • Yang, Yun-Seok (Department of Advanced Parts and Materials Engineering, Chosun Univ.) ;
  • Hwang, Chan-Youn (Department of Advanced Parts and Materials Engineering, Chosun Univ.) ;
  • Yoo, Young-Tea (Department of Mechatronics Engineering, Chosun Univ.)
  • 양윤석 (조선대학교 첨단부품소재공학과) ;
  • 황찬연 (조선대학교 첨단부품소재공학과) ;
  • 유영태 (조선대학교 메카트로닉스공학과)
  • Received : 2012.03.09
  • Accepted : 2012.06.12
  • Published : 2012.10.01

Abstract

In this paper, we present research experimental results about the different thickness T-joint welding of the high power continuous wave(CW) Nd:YAG laser for the secondary battery of a vehicle. Although the conventional method used for the secondary battery is a argon TIG welding, we utilize a laser welding to improve Tungsten Inert Gas(TIG) welding's weakness. The laser, which has a couple of advantage such as aspect ratio, low Heat Affected Zone(HAZ), good welding quality and fast productivity utilized in this work is a CW Nd:YAG laser. In order to observe laser welding sections, we used a optical microscope. Through the analysis of the metallographic, hardness, aspect ratio, and heat input, we obtained the desired data in condition of 1800 W laser beam power and 1.8 m/min and 2.0 m/min laser beam travel speeds. In order to compare electric resistances of the argon TIG welding and laser welding, we made an actual battery and the electric resistance of the laser welding is reduced by 40~45% comparing with the argon TIG welding.

Acknowledgement

Supported by : 한국연구재단

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