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    题名: 應用於鋰電池之薄型鎳片微電阻點焊製程參數可焊接性研究;The effects of welding parameters on the small scale resistance spot weldability of thin nickel sheets for lithium battery application
    作者: 劉志賢;Liu, Chih-Hsien
    贡献者: 機械工程學系在職專班
    关键词: 微電阻點焊;薄型鎳片;製程參數;可焊接性;應用於鋰電池;small scale resistance spot weld;thin nickel sheets;welding parameters;weldability;for lithium battery application
    日期: 2017-07-12
    上传时间: 2017-10-27 16:16:07 (UTC+8)
    出版者: 國立中央大學
    摘要: 本文主要研究厚度為0.127mm之薄型鎳片與厚度為0.5mm之鐵片微電阻點焊特性,通過固定的擠壓時間(squeeze time)和變化的焊接電流上升斜坡時間(ramp time);焊接電流(welding current);焊接時間(welding time);保持時間(holding time);和電擊下壓力(electrode force) 等關鍵焊接參數對於微電阻點焊的影響。通過拉伸剪切試驗,微觀結構,監控電流(monitoring current)以及表面輪廓掃描來模擬薄型鎳片與鋰電池芯使用微電阻點焊結合時的焊接品質。可以得到焊接電流與焊接時間對於焊點大小的影響最大而電擊下壓力與點焊大小成反比的結論,另外觀察到拉伸剪切試驗後的試片斷裂位置在焊點內側而不是薄型鎳片與鐵片焊點結合處可以推斷所有參數對於拉伸剪切力引響不大,拉伸剪切力只受到薄型鎳片本身抗拉強度影響,這一點可以由拉伸剪切試驗成果與表3中純鎳拉伸強度478Mpa接近可以得到印證。;In this paper, the study of the thickness of 0.127mm pure nickel sheet and the thickness of 0.5mm iron small scale resistance spot welding(SSRSW) characteristics, especially in the fixed squeeze time and change the welding current rise ramp time; welding current, welding time, holding time, and the key welding parameters such as the electrode force are affected by the small scale resistance spot welding(SSRSW). The tensile quality of pure nickel sheet and battery cells using small scale resistance spot welding(SSRSW) was simulated by tensile shear test, microstructure, monitoring current and surface profile scanning. It can be obtained that the welding current and the welding time have the greatest influence on the nugget diameter of the solder joint and the electric shock pressure is inversely proportional to the spot welding nugget diameter. It is also observed that the fracture position of the test piece after the tensile shear test is on the inside of the solder joint rather than the pure nickel sheet It is inferred that all parameters have little effect on the tensile shear force, and the tensile shear force is only affected by the tensile strength of the pure nickel sheet itself, which can be determined by the tensile shear test results with the table 3 pure nickel tensile strength of 478Mpa close can be confirmed.
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