結論與未來方向

5.1 結論

有別於傳統定電流定電壓充電，充電速度不彰。與快速充電技術，充電效率不良 的缺點。本論文提出一固定效率追蹤之演算法，我們希望可以依據電池的內阻與效率 的設定達到快速充電的目的。首先，我們觀察電池的響應行為與其相對應的模型，利 用模型中的 EMF 電壓值作為參考。將電池等效成 EMF 定電壓源與一可變電阻的串聯模 型，並利用此關係在充電過程中得到電池等效內阻的走勢。接著，我們推導充電效率 與外部電壓及 EMF 之間的關係，藉由此關係我們得到控制效率的參數值即為外部電壓 與 EMF 電壓的比值。得到這兩層關係之後，我們先利用效率的關係式算出期望的外部 電壓值，接著利用等效內阻將其轉換成控制電流，來達到固定效率充電。使其充電效 率不至於下降太多的情況下，提升充電電流進而達到快速充電的目的。

數據上我們先使用 LABVIEW 控制軟體控制實際電源供應器證明，採用本論文所提 出的方法可以在犧牲效率0.73% 的情況下，充電速度加快 12.4%，達到犧牲少量效 率得到快速充電的目的。接著我們利用微控制器PIC16F877 建立實際的系統架構也可 達到快速充電的目的。證明其可有效的加快充電速度與降低效率損失。

5.2 未來展望

本論文所提出的方法是根據電池不同的內阻行為，產生不同的控制電流適應性的 對電池作充電。但是我們的方法仍屬於半適應性式的充電法，也就是說必須先對所欲 充電的電池特性有所了解才能使用，例如EMF 電壓值。因此，如何能使我們的方法 變成全適應性充電法，不必了解是什麼電池型號，即可對電池產生適應性的充電，是 未來值得努力的方向。希望可以發展出全適應性高效率充電法，使得電池可以在高效 率的情況下快速充電。

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