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이차전지 소재용 구리의 파이버 레이저 용접 특성에 관한 연구
박은경,이가람,이현중,유영태,Park, Eun Kyeong,Lee, Ka Ram,Lee, Hyun Jung,Yoo, Young Tae 한국레이저가공학회 2014 한국레이저가공학회지 Vol.17 No.3
In this study, we analyzed fiber laser welding for the pure copper thin plates in a series of secondary lithium-ion batteries; and performed the experiment for the purpose of the preceding study to replace bolt joints method the with the laser welding method. We have changed the peak power of the laser from 5 to 6kW, the pulse duration by 4, 6, 8, and 10ms, the frequency by 10, 12, 16, and 25Hz, and the focal position by -3, 0, and +3. As a result, when the focal position is at +3, the peak power is 5kW, and the pulse duration and the Frequency are 4ms and 25Hz, respectively, we obtain 2.1 and 2.5 times better tensional strengths, respectively, than the highest values of tensional strengths obtained with the focal positions at 0 and -3.