- 學位論文
混元型燃料電池/鋰電池在便攜式電源系統特性評估
Characteristic Evaluation of Hybrid Fuel Cell / Li-ion Battery on Protable Power System
摘要
在便攜式電子產品的功能提升下，所需系統電力也越高，目前最常用的充電電池為鋰電池，但是在強調一天工作至少八個小時的要求下，充電電池之儲存式能源已無法滿足多功能化的電子產品，因此，除了改善現有充電電池的性能，燃料電池成為最受矚目的可攜式能源技術。不過，當燃料電池操作時，如果外部負載突然增加時，燃料並無法有效率且快速地供應至燃料電池，故藉由燃料電池與可充電鋰電池結合的混元型電源系統，可以有效提升電池能量密度，並且可符合尖峰電力需求與延長操作時間。 故本論文係針對最常應用在便攜式電子產品的質子交換膜燃料電池(PEMFC)、直接甲醇燃料電池(DMFC)與可充電鋰電池結合之混元型電源系統作為研究主題，藉以分析評估不同混元型電源系統特性，以期達到最佳化之便攜式混元型電源系統應用效能。
並列摘要
As the portable electronic product improved, the power consumption of system is higher. At present stage, the Li-ion battery is the most used rechargeable battery. But under the demand that it must work at least eight hours in one day, store energy of rechargeable battery was already unable to satisfy multi-functional electronic product. Therefore, except for improving the performance of the existing rechargeable battery, the fuel cell becomes the most attractive portable energy technology. However, when the fuel cell was operated, if outer-load suddenly increased, the fuel can’t supply to the fuel cell efficiently and quickly. So the fuel cell and the rechargeable Li-ion battery combined to form a hybrid power system. It can improve energy density of the battery effectively, and can accord with the peak electricity demand and lengthen operating time. This thesis aims at porton exchange membrance fuel cell (PEMFC), direct methanol fuel cell (DMFC) and rechargeable Li-ion battery combined to form a hybrid power system as the research topic. It analyzes the characteristic of different hybrid power system, and hope to achieve the best application performance of portable hybrid power system.