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研究生: 蔡偉崙
Tasi Wei Loong
論文名稱: 脈衝式Nd:YAG雷射封裝3003鋁合金方型鋰電池殼體之機械性質與熱傳分析
A Study on the Mechanical Properties and Heat Transfer Analysis of Packaging 3003 Aluminous Prismatic Li-Ion Battery Case by Pulsed Nd:YAG Laser
指導教授: 程金保
Cheng, Chin-Pao
周長彬
Zhou, Chang-Bin
學位類別: 碩士
Master
系所名稱: 工業教育學系
Department of Industrial Education
論文出版年: 2005
畢業學年度: 93
語文別: 中文
論文頁數: 114
中文關鍵詞: 脈衝式Nd:YAG雷射鋰離子電池3003鋁合金雷射銲接ANSYS熱傳分析
英文關鍵詞: Pulsed Nd:YAG Laser, Li-ion Battery, 3003 Aluminum Alloy, Laser Welding, ANSYS Heat Transfer Analysis
論文種類: 學術論文
相關次數: 點閱:286下載:28
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  • 本研究利用脈衝式Nd:YAG雷射進行3003鋁質方型鋰離子電池殼體封裝,主要探討雷射輸入脈衝能量、峰值功率、以及銲道重疊率大小對封裝品質的影響,藉此得到最佳化製程參數。同時,利用ANSYS有限元素模擬分析以及熱電偶實際測量銲道表面溫度,藉此了解輸入能量大小所造成的表面溫度變化,以及解釋脈衝能量對銲道熱裂、氣孔、合金成分揮發等機械性質的影響。

    研究發現輸入能量越大時,造成的銲道表面溫度越高,在輸入能量20 J以上時,銲道表面溫度已超過主要合金元素Mn的沸點,使銲道合金元素含量比例因揮發而明顯下降,且氧化程度也較嚴重,因此造成銲道的熱裂、氣孔也相對提高。根據結果顯示當重疊率60~70 ﹪,峰值功率Pk=3 kW、4 kW,脈衝能量E=10~12.5 J時,為最佳化製程參數範圍。

    This study includes the mechanical properties and heat transfer effects of the pulsed energy, peak power and overlap of pulsed Nd:YAG laser on packaging 3003 aluminum prismatic Li-ion battery case. The experimental analysis and ANSYS simulation have been made in this study to investigate the change of surface temperature of weld, hot cracking, porosity and alloy elements when different pulsed energy parameters were used.

    The results show that the weld surface temperatures increase with increasing of the energy inputs. The weld surface temperatures have exceeded the boiling point of the chief alloy element, Mn, when the input energy was used more than 20 J. It made the proportion of alloy elements in weld cut down obviously and oxidation more seriously. There are also a lot of porosities and hot cracking in the weld with high energy input. The results of experiment show that optimum parameters are about 60 to 70 ﹪of overlap, 3 kW or 4 kW of peak power (Pk), and 10 to 12.5 J of pulsed energy (E)

    目 錄 謝誌……………………………………………………………I 中文摘要……………………………………………………II Abstract……………………………………………………III 目錄…………………………………………………………IV 表目錄………………………………………………………VI 圖目錄………………………………………………………VII 第一章 緒言…………………………………………………1 第二章 理論與文獻探討……………………………………3 第一節 鋰電池組裝製程與殼體材料………………………………3 2-1-1 鋰電池組裝製程………………………………………………3 2-1-2 鋰電池殼體材料……………………………………………4 第二節 Nd:YAG雷射原理與製程參數………………………………8 2-2-1 脈衝式Nd:YAG雷射……………………………………………8 2-2-2 雷射製程參數…………………………………………………10 2-2-3 銲點重疊率(Overlap)………………………………………13 第三節 鋁合金特性…………………………………………………19 2-3-1 3003鋁合金機械性質…………………………………………19 2-3-2 鋁合金的光學特性……………………………………………21 第四節 雷射銲接模式………………………………………………26 2-4-1 雷射銲接銲道模式……………………………………………26 2-4-2 保護氣體與電漿行為…………………………………………26 第五節 熱傳理論分析………………………………………………28 2-5-1 銲道表面溫度與穿透深度之數學推導………………………28 2-5-2 有限元素數值分析……………………………………………30 2-5-3 雷射銲接熱傳分析文獻回顧…………………………………33 第三章 研究方法與步驟…………………………………39 第一節 實驗流程……………………………………………………39 第二節 實驗設計……………………………………………………41 3-2-1 材料準備………………………………………………………41 3-2-2 夾治具設計與製作……………………………………………42 3-2-3 溫度擷取器安裝………………………………………………44 3-2-4 設備組裝………………………………………………………44 3-2-5 製程參數設計…………………………………………………45 第三節 分析試驗與方法……………………………………………58 3-3-1 製程評估標準…………………………………………………58 3-3-2 機械性質試驗…………………………………………………58 3-3-3 數值分析方法…………………………………………………60 第四章 結果與討論…………………………………………68 第一節 機械性質分析……………………………………………68 4-1-1 銲道直徑………………………………………………………68 4-1-2 銲道深度、凹陷量……………………………………………69 4-1-3 金相顯微組織…………………………………………………70 4-1-4 拉伸試驗………………………………………………………71 4-1-5 EDS合金元素成分分析………………………………………72 第二節 ANSYS數值分析與溫度測量結果…………………………94 第五章 結論與建議………………………………………108 第一節 結論……………………………………………………108 第二節 建議……………………………………………………110 參考文獻……………………………………………………111

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