리튬이온전지의 밀봉용접을 위한 펄스 Nd:YAG레이저 용접조건의 최적화

Optimization of Pulsed Nd:YAG Laser Welding Conditions for Sealing of Lithium-ion Battery

  • 김종도 (한국해양대학교 기관시스템공학부) ;
  • 유승조 (한국해양대학교 대학원) ;
  • 김장수 (한국해양대학교 대학원)
  • 발행 : 2006.07.01

초록

Laser material processing is a very fast advancing technology for various industrial applications. because of many advantages. Its major advantage of less and controlled heat input has been exploited successfully for the very critical application of aluminium alloy welding. This study suggested the occurrence source of weld-defects and its solution methods in a welding of lithium ion battery by pulsed Nd:YAG laser. In experiment. battery case has changed over joint geometry from welding of side position to flat one. In the case of a electrolyte injection hole in order to seal it. welding is carried out after pressing Al ball. At this time. an eccentric degree. contact length and gap are worked as a major parameters. As improving the method of Al ball pressing. it was able to reduce an eccentricity. increase the contact length and decrease gap. As a results of a experiment. a sound weld bead shape and crack-free weld bead can be obtained.

키워드

참고문헌

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