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

Kim, Jong-Do (한국해양대학교 기관시스템공학부)
Yoo, Seung-Jo (한국해양대학교 대학원)
Kim, Jang-Soo (한국해양대학교 대학원)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.30, no.5, 2006 , pp. 623-628 More about this Journal
Abstract
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.
Keywords
Pulsed Nd:YAG laser welding; Lithium-ion battery; Aluminium alloy; Joint geometry;
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