臺灣博碩士論文加值系統

本研究的目標於製作石蠟與膨脹石墨混合的相變材料，適用於鋰電池組的熱管理。當鋰電池組放電溫度升高的情況下，可將鋰電池的溫度熱導出與有效降低電池表面溫度。使用以製作出不同比例65:35、70:30、75:25、80:20、85:15的石蠟與膨脹石墨，與密煉機以質量比例75:25比較，取最佳結果，製作出實體相變材料，量測出相變材料的熱傳導係數為10.65(W/m.k)，比原本石臘的熱傳導係數為0.22(W/m.k)，多出48倍以上，大幅提升石臘本身熱傳導係數。將鋰電池組放入相變材料內，使用紅外線熱像儀，觀看表面溫度變化情形。利用石蠟與膨脹石墨的相變材料，大幅的降低鋰電池組整體的表面溫度，降低的溫度約為11.2°C，得以將鋰電池組之表面溫度控制在40°C以內，有效進行電池組的熱管理。

This study aims to utilize paraffin and exfoliated graphite to fabricate a phase change material (PCM) for thermal management in the Li-ion battery set. When lithium batteries discharge with a high temperature, the PCM is capable to conduct their heat and reduce their surface temperature. The melting mix method was used to fabricate the PCM with the ratio of 65:35, 70:30, 75:25, 80:20, 85:15, and analyze the trend of latent heat by Differential Scanning Calorimeter. Then, the intensive mixer was used to fabricate the PCM with the ratio 75:25, and measured its thermal conductivity of 10.65(W/m.k) which was 48 times greater than the original paraffin of 0.22(W/m.k). It is significantly increased the PCM thermal conductivity than paraffin. The lithium batteries were placed inside the PCM and observed their surface temperature by the infrared thermal video system. The results showed that the PCM can reduce the battery set surface temperature about 11.2°C. The PCM is effectively to control the battery surface temperature under 40°C as a thermal management material for the Li-ion battery set.

摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 VIII
第一章 緒論 1
1.1 前言 1
1.2 研究動機 1
1.3 研究目標 2
第二章 文獻回顧 3
2.1相變材料種類 3
2.2有機無機共晶的介紹 4
2.2.1有機相變材料 4
2.2.2無機相變材料 7
2.2.3共晶相變材料 8
2.3 有機無機共晶的優缺說明 10
2.4相變材料製備方法 11
2.4.1熔融共混法 11
2.4.2擠出法 12
2.4.3吸附法 13
2.4.4壓製法 15
2.5材料挑選 19
第三章 實驗設計與規劃 21
3.1 實驗架構與材料設備 21
3.2材料石蠟與石墨 23
3.3石蠟與膨脹石墨等比例的製備 24
3.3.1 熔融共混法 24
3.3.2 密煉機 25
3.4 FE-SEM分析(場發射掃描式電子顯微鏡) 28
3.5 DSC分析(調幅式示差掃描分析儀) 29
3.6接合壓模機製作 30
3.7熱傳導分析儀 31
3.8熱壓機製作 32
3.9 PCM加工製作 (相變材料) 33
3.10用紅外線熱像儀測試 35
第四章 結果與討論 38
4.1石蠟與膨脹石墨的微結構 38
4.2石蠟與膨脹石墨的熱特性 39
4.3石蠟與膨脹石墨的熱傳導係數 41
4.4石蠟與膨脹石墨的PCM紅外線熱像儀測試 41
第五章結論與未來研究方向 45
5.1 結論 45
5.2 未來研究方向 45
參考文獻 46

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