溫度因子對磷酸鋰鐵電池充放電效能之影響初探

本論文只在介紹執行行政院國家科學委員會中部科學工業園區管理局所核定之高科技設備前瞻技術發展計畫，其半導體壓膜製程設備之研發架構、主要新興產業之技術與所需要之工程模組設計與分析。計畫期程為自98年10月至100年4月止，說明如何結合產官學之研究進行開發，及本校在研發半導體用真空壓膜製程設備中所提供相關的教學、工程技術能量，在多方面的努力配合與產業合作之下，得以完成屬國產自製之半導體製程設備。

In this paper, we designed and assemblied the battery charge-discharge circuits and measurement equipment for LiFePO4 cells, and study the effects of temperature factors(-30℃～55℃)to the charge-discharge efficiency of battery cells using the programmable temperature and humidity environmental test chamber. The charge-discharge experiments present that times of charge-discharge at higher temperatures are longer than that of ambient one and the inner resistant of the cells is lower than that of ambient one resulting the efficiencies of LiFePO4 cell at higher temperatures are better than that of ambient one. On the other hand, times of charge-discharge at lower temperatures are shorter than that of ambient one resulting the efficiencies of LiFePO4 cells at lower temperatures are worse than that of ambient one. Moreover, the efficiency of discharge at -20℃ and -30℃ decreases 78% and 95% respectively compared to the ambient temperature. Therefore, the negative effect of lower temperature to the efficiency of LiFePO4 cells is obviously so that limits the applications of them in automobile operated at various temperatures, especially at the low temperatures.