Development And Energy Management Research Of A Fuel Cell Vehicle

The energy crisis and environmental issues are important to all countries in the world.To effectively cope with the problems of energy shortage and environmental damage,all countries are vigorously developing new energy and conducting research on the application of renewable energy in various industries.Among all the new energy sources,hydrogen has significant advantages: huge reserves,cleanliness,and high efficiency.Fuel cell is a device that can efficiently convert hydrogen energy into electricity.It is widely used in distributed power generation,transportation,military,portable power supply and other fields.Especially in the transportation field,the fuel cell vehicle is a new energy vehicle with a driving habit similar to conventional fuel vehicles.It is clean,efficient and convenient.At present,various countries including China have research and development plans for fuel cell vehicles,and a few have entered the commercialization stage.In order to better grasp the technology of design,development and integration of fuel cell vehicles,this paper designs and renovates the power system for a common-use sightseeing car.The parameters of the small fuel cell vehicle were matched and designed,the electrical system of the car was built,the control system based on STM32 MCU and the monitoring system based on LabView were completed.This paper also does important parameters measurement for the power sources,including fuel cell efficiency,hydrogen consumption,lithium battery charge and discharge internal resistance,voltage characteristics and efficiency characteristics.In the end,this paper designed and developed a fuel cell vehicle.For fuel cell vehicles,the energy management method is a key factor in determining vehicle performance,which affects the vehicle's hydrogen consumption performance,power source durability,efficiency and many other aspects.In this paper,from the perspective of engineering practicality,a rule-based power following energy management method is adopted to allocate power to the vehicle,and the vehicle test is carried out according to this.The feasibility of the power-following energy management method is verified.Through the vehicle cycle experiment,the vehicle's cruise capacity based on the power following energy management method is about 88 km,and the hydrogen consumption performance of the vehicle is about 689.77g/100 km.And the effectiveness of the power following energy management method and the feasibility of the developed fuel cell vehicle and hybrid system were verified.In addition,based on the parameters of the fuel cell vehicles and the measured conditions,this paper designs a equivalent hydrogen consumption minimum energy management method(ECMS),and proposes a stratified energy management method based on the Pontryagin minimum principle.The comparation of experimental data and calculation results shows that under the same working conditions and the same SOC initial value,the ECMS method has the advantages of SOC regression and lower fuel cell operating pressure and better durability,but the fuel economy is relatively poor;The SOPMP method has lower hydrogen consumption and equivalent hydrogen consumption,and has better fuel economy,but the fuel cell has higher operating pressure and relatively poor durability.Therefore,in actual use,an appropriate energy management method can be selected according to different needs.