The Simulation And Design Of Vehicle Fuel Cell System Characteristics Based On Simulink

Proton Exchange Membrane Fuel Cell(PEMFC)has the advantages of high efficiency,low pollution,good reliability,low operating temperature,and rapid start-up.It has become an ideal method of hydrogen energy utilization and is also very suitable for fuel cell vehicles.With broad market prospects and huge commercial value,the research and development of PEMFC has become one of the hot spots in the automotive industry in recent years.In order to understand the power output capability and characteristics of PEMFC more thoroughly,except for conducting experimental research,it is also necessary to establish a mathematical model for PEMFC for simulation analysis.Through the simulation calculations,not only the characteristics of the fuel cell system can be easily obtained,but also the performance optimization can be performed by changing the structure and operating parameters of the fuel cell,so as to provide a basis for the reliability design of PEMFC and the formulation of reasonable control strategies.At the same time,this research method can theoretically reflect the working mechanism and internal transfer process of PEMFC,and has also become an indispensable research method in the field of fuel cell research.This article summarizes the development history and current situation of the fuel cells,outlines the research status of proton exchange membrane fuel cell mathematical models,and describes the structure of PEMFC and the structural and functional characteristics of each component.Based on the chemistry theory and citing empirical formulas,the steady-state mathematical model of the proton exchange membrane fuel cell was established in the Matlab/Simulink simulation software.The article mainly analyzes that the change of battery operating temperature,the partial pressure of anode hydrogen and cathode oxygen,and the different membrane water contents have the effect on the steady-state function of PEMFC.However,with the increase of the partial pressure of the reaction gas,the sealing of the battery will become more difficult.The polarization curve obtained from the calculation and the experimental test results are mutually confirmed.The design parameters of some component are obtained to optimize the performance of the entire fuel cell system.This paper designs and builds a fuel cell system matching software,and it is verified by parameter matching and actual testing of key components such as radiators,air compressors,and cooling system drive pumps of a 30kW fuel cell system.On this basis,the key components and parameters of an 80kW fuel cell system were obtained through software matching,which provided a basis for the subsequent design of the fuel cell system.