傳統的電池測試系統，化成與分容過程中，由於充放電能量經過多級轉換器，造成大量轉換損失。若於兩個電池間嵌入一H橋式轉換器，另外，在個別電池與直流匯流排之間，以雙向返馳式轉換器補足或回收多餘的功率，可用較少轉換器，符合充放電配方的電流需求。藉由生產排程，將充放電功率相近的電池配成對，可使大部分功率經由效率較高的H橋式轉換器，返馳式轉換器僅處理小部分功率，減少損失。
本研究實際製作充放電電路，模擬定電流放電及定電流定電壓充電之生產配方，進行電池測試實驗。實驗結果顯示，相較於傳統的電池測試系統，採用本論文所提出之充放電電路，在分容程序中，可減少50 %的能量損失。

In the conventional battery test system, charging and discharging currents go through several stages of AC-to-DC and DC-to-DC power converters causing power conversion losses during formatting and grading processes. An H-bridge converter is interleaved between two tested batteries, which are paired up to counterbalance the charging and discharging powers by properly arranging the manufacturing schedule. To cope with the designated formatting and grading profiles, each battery is attached by a bidirectional flyback converter to complement the insufficient current into or remove the excessive current from the tested battery. A great amount of energy can be saved in battery production for a battery test system with fewer power conversion stages and less power transfer between the tested batteries and the DC-bus. Experiments on two pair-up batteries with the proposed charging/discharging circuit are conducted to accomplish the profiles of constant-current discharging and constant-current constant-voltage charging. Experimental results demonstrate that the power losses can be effectively reduced by 50 % during the grading process as compared with that of the conventional battery test system.

論文審定書 i
誌謝 ii
中文摘要 iii
Abstract iv
Contents v
List of Figures vi
List of Tables viii
Chapter 1 Introduction 1
1.1 Research Background and Motivation 1
1.2 Content Arrangement 3
Chapter 2 Battery Test System 5
2.1 Conventional Battery Test Systems 5
2.2 Power Flow 7
Chapter 3 Analysis of Charging/Discharging Circuit 11
3.1 Circuit Configuration 11
3.2 Circuit Operation 12
3.3 Variable Frequency Modulation with Constant On/Off-Time Control 17
3.4 Control Scheme 19
Chapter 4 Design and Experiment 24
4.1 Experimental Design 24
4.2 Experimental Results 28
4.3 Calculation of Power Conversion Loss 38
Chapter 5 Conclusion 39
References 40

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