연료 전지의 성능 모델링 및 연료 전지 자동차의 성능 예측

In developing new generation vehicles, vehicles powered on electricity become much more important, by virtue of their emission merits. In addition, fuel cell is considered as a major source to generate the electricity for vehicles in near future. This paper focuses on fuel cell modeling to estimate characteristics of power and fuel hydrogen consumption of a fuel cell stack. From the model, simulations to evaluate performance of a fuel cell vehicle are applied. From analytically derived equations showing relationships of stack voltage and current, provided power of the fuel cell stack is estimated. The estimations are also compared with the data of the Ballard Nexa fuel cell stack. In order to investigate a fuel cell based vehicle, motor and fuel cell models are integrated in a vehicle model. The characteristics of individual components are also integrated. The individual components include drivetrain, vehicle properties such as drag, frontal area, wheel inertia, and the fuel cell stack. Calculated fuel cell equations show good agreements with test results. Furthermore the stack model shows its propriety in aspect of power characteristics, polarization, and fuel consumption. In the vehicle simulation, maximum speed and hydrogen fuel consumption are estimated. Even though there is no experimental data from vehicle tests, the vehicle simulation showed physically-acceptable vehicle characteristics.