Preliminary Study On The Parametric Design And Control Strategy Of Powertrain System For Fuel Cell Vehicle

As social&economy and science&technology development, vehiclehas become an essential transport in our daily life. Based on the backgroundof serious environmental pollution and shortage of energy supply,automobile electrification has become the consensus of the industry. Fuelcell electric vehicle, possessing many advantages such as energy-saving, noemission, etc., will inevitably dominate the development of the automobileindustry.The fuel cell engine is commonly used in parallel with battery to drivethe vehicle. This structure takes both the advantage of fuel cell system's highenergy density and batteries' high power density, which make the systemwork in different modes under different road conditions. Because of thecomplex energy and power systems in fuel cell vehicle, reasonableparameters matching and control strategies optimization is necessary.Firstly, the type and characteristics of three major components (E-motor,battery and fuel cell engine) were analyzed and compared. Based on theprinciple of dynamic performance satisfaction, the performance of theselected subsystem is analyzed.Secondly, according to vehicle dynamic performance requirements, theparameter design of power-train system is completed based on thecharacteristics of the vehicle SANTANA2000. Different conditions on thedynamic system parameters were calculated to verify the design parameters. Then, the thesis analyzed and designed the control strategy of the fuelcell hybrid electric vehicle power-train aiming at improve the fuel economyand performance of the vehicle. Based on the power follower mode, thecontrol strategies under drive and brake mode are investigated.At last, summary was made and the problems requiring further studieswere discussed.