Modeling And Simulation Of The Fuel Cell Hybrid Powertrain

The fuel cell hybrid powertrain is a new potential automotive powertrain. The fuel cell hybrid powertrain is high energy efficiency and without any pollution, but the fuel cell stack which is used in the fuel cell hybrid powertrain is expensive and not durable at present. The mass production of the fuel cell hybrid powertrain will partially decrease the cost of producing the fuel cell stack. The well selected configuration of the fuel cell hybrid powertrain and the well designed power distribution strategy will partially increase the durability of the fuel cell stack.Completing the configuration selection and the power distribution strategy optimization will need a lot of research. Researching directly using the fuel cell hybrid powertrain real prototype will increase the cost and decrease the R&D speed. Previous simulation calculation using the fuel cell hybrid powertrain simulation model will decrease the cost and increase the R&D speed.This thesis primarily discusses how to complete the simulation model of the fuel cell hybrid powertrain in the Matlab/Simulink simulation environment. In the fuel cell hybrid powertrain discussed in this thesis, the fuel cell is not connected to the power bus directly. The fuel cell hybrid powertrain discussed in this thesis uses PEM fuel cell stack as the primary energy storage system, and uses the power battery as the auxiliary energy storage system.Describing the operating characteristics of the fuel cell stack using the mechanism model will be too complex. Using the mechanism model of the fuel cell stack will decrease computing speed, and the increase of the accuracy will be not obvious. An empirical model is used to describe the operating characteristics of the fuel cell stack in this thesis. For the same reason, a Rint empirical model is used to describe the operating characteristics of the power battery in this thesis. A mechanical model is used to describe the operating characteristics of the drive motor in this thesis. A mechanical model is also used to describe the operating characteristics of the vehicle in this thesis. This thesis primarily discusses how to model the simulation model of the fuel cell hybrid powertrain, so a simple power distribution strategy is used in this thesis. The key variable curves obtained in the simulation demonstrate that the designed fuel cell hybrid powertrain simulation model and the designed power distribution strategy are correct. At the same time, the key variable curves demonstrate that several coefficients are very important in the real configuration of the fuel cell hybrid powertrain.