本論文主要內容為探討改良式筆記型電腦雙電池模組充放電系統的設計，為了能夠控制不同電池模組間正確的充放電路徑，雙電池模組的充放電系統需要一個選擇器電路來實現此一目的。傳統式筆記型電腦雙電池模組充放電系統的選擇器，是以一個專門控制不同電池模組間正確充放電路徑的控制IC和多個MOSFET開關組合而成。改良式筆記型電腦雙電池模組充放電系統的選擇器則改用以主動式二極體為主，具有高充放電轉換效率、簡化控制電路設計、支援多電池模組系統及降低成本等優點。
另外，本論文對於筆記型電腦所使用的電池特性、充電方法以及充電器的設計原理也有詳細介紹，最後利用實驗驗證本文所提出的改良式筆記型電腦雙電池模組充放電系統確實可行，並且以數據分析其設計優於傳統式雙電池模組充放電系統。

The main focus of this thesis is on the design of an improved charger/discharger system for dual battery modules of notebook computers. A selector is required to provide the correct charging and discharging paths between the dual battery modules and the charger/discharger system. Conventionally, the selector is composed of one control IC and several MOSFET switches. The improved version adopts the active diodes to raise the conversion efficiency, to simply the controller design, to support dual battery modules and to lower the circuit cost.
In addition, the characteristics and various charging strageties of the batteries used in the notebook computer are discussed. The charger/discharger system is implemented. Experimental results on a prototype are demonstrated to verify the feasibility of the proposed topology and control method. It is proven that the performance of the improved charger/discharger system is superior compared to the conventioal one.

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