本論文設計一個以Microchip-PIC單晶片為基礎的鉛酸電池快速充電系統，並且採用正負脈衝的充電方式對電池充電。為了進行快速且有效的充電，有別於以往固定脈衝充電時間之方式，本論文則根據電池內部的內阻變化來調整充電脈衝的時間長短，將可使得充電過程更有效率。因此本論文提出內阻的估測方法，在內阻到達上限值時進行放電，避免電池充電時的溫昇現象。
另外為了評估充電時電池之狀態，提出了模糊電量估測器，在正負脈衝的充電過程中，由電池的電壓變化，精確估測出電池的電量；除了能即時的知道電池電量外，更可以適時的給予適當的充電電流，以保護電池，延長其壽命。
為了便於觀測實驗結果，本論文以Visual Basic設計一視窗程式進行監控，並顯示電池的電流、電壓與溫度變化。

This thesis presents a PIC-based rapid charger of a Lead-Acid battery. The charger applies Reflex method for battery charge. However, different from existing methods with fixed charging interval, this thesis proposes a more flexible design with variable charging time according to the internal resistance of the battery. Therefore, this thesis firstly proposes an estimating method of the internal resistance of Lead-Acid battery. To prevent the temperature rising of the battery from charging, the charger will discharge when the internal resistance reaches a threshold value.
Moreover, for estimating the state of charge accurately, a fuzzy estimator is proposed by observing the voltage variation of the charging state of the battery. With the estimator, not only the capacity of battery can be obtained immediately, but also the suitable charging current can be controlled to protect the battery, which can lengthen the battery life.
For the purpose of observing the experimental process, a window display, which shows current, voltage, remaining Coulomb, and
temperature, is designed by using Visual Basic.

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