本論文之主要目的為發展直接甲醇燃料電池之供電最佳化設計方法。提出直接甲醇燃料電池與二次電池混合供電模式之能量管理模式，提高供電系統之穩定性及燃料電池使用壽命。本研究之主題包括(1)討論不同操作條件對直接甲醇燃料電池輸出功率之影響，(2)發展直接甲醇燃料電池/電池混合供電架構，(3)討論Fuzzy、PIDNN和ANFIS 3種不同控制方法在混合模式對直接甲醇燃料電池電源進行能源管理。 探討主動式混合供應模式應用於直接甲醇燃料電池在不同負載操作條件下的供電系統，比較輸出電壓、輸出功率與輸出電流之間關係，以瞭解不同操作條件下對DMFC性能的影響，提出3種不同動態補償控制方法及硬體系統架構以延長其操作壽命及取代傳統電池混合供電系統。研究在高負載下，電池提供輔助動力幫助於高負荷需要作為補償來源，使DMFC運作時不會有電力中斷或輸出電壓大幅下降之問題，在低負載時將燃料電池多餘的能量儲存到電池中，使燃料電池儘量操作在符合負載行為之平均功率點。 藉由本研究對燃料電池之應用，增加了DMFC燃料電池系統暫態性能和滿足能源管理的要求。展露出燃料電池的優異性能，有效的延長工作時間，彌補了傳統電池工作時間過短的缺憾。This study aimed to develop an optimal design method for the DMFC (direct methanol fuel cell) power supply. The proposed energy management model for a hybrid power supply of the DMFC and secondary battery can improve the power system stability and fuel cell life. The topics of this study include: (1) discussed performances for different operating conditions: fuel cell temperature, anode ?ow rate, air flow rate and methanol concentration, (2) the development of the DMFC/battery hybrid power supply structure and (3) discussion of the application with Fuzzy, PIDNN and ANFIS three different control methods in a hybrid model for DMFC power supply energy management. This study explored the application of an active hybrid power supply model in the DMFC when the power supply systems are under different operating conditions for loads. This study also investigated the relationship between output voltage, output power and output current to help understanding the impact of different operating on conditions on the DMFC's performance. It also proposed three different control methods dynamic compensation and hardware system structure to extend service life and replace the traditional hybrid cell power supply system. The provision of auxiliary power provided by the cell was explored as a source of compensation in case of high load needs to prevent power outages or power slumps of operational DMFCs. In the case of a low load, excess energy from the DMFC was stored in the battery to keep average power of the load as much as possible. Studies on the application of DMFC have increases the transient performance of the DMFC fuel cell system and satisfies the requirement of energy management, and demonstrated the cells’ efficiency in extending working time, making up for the defect of too short a working time for traditional batteries.
