Research On Power System Design And Energy Management Of Hybrid Fuel Cell Vehicle

With the deterioration of environmental pollution and the intensification of fossil fuel consumption,new energy vehicles emerge at the historic moment.Battery technology at present has not break through the bottleneck,the promotion of pure electric vehicles is limited by many shortcomings such as driving range and charging time.Fuel cell and battery hybrid drive vehicle with advantages such as a long trip range of traditional vehicle and new energy vehicles using the clean and efficient power drive and zero emission pollution,is considered to be the ideal model.Because fuel cell vehicle is frequently excessive discharged which shortens its service life,and high demand module power increases dramatically economic cost and other issues.Fuel cell vehicles combined with battery module based on tiny-variables fuzzy logic energy management system control strategy is proposed,in which the fuel cell compensates battery discharging.MATLAB is used to complete the theoretical simulation of the fuel cell power model,and the experiment verifies the correctness of the model.In MATLAB/Simulink environment,control strategy optimization model was constructed to optimize the traditional control strategy model based on ADVISOR for secondary development.The simulation verifies the rationalization and power performance of the energy management control strategy model for the electrical-electrical hybrid vehicle.Finally,the total energy utilization efficiency of the system at the end of driving cycle is taken as the optimization objective to make comparative analysis.Comparative analysis shows that the error between the voltage and power test curves of the fuel cell system used in the experiment and the theoretical voltage and power polarization characteristic curves of the fuel cell system established in this paper is no more than 2.5%.The correctness of the experimental scheme and theoretical model of the fuel cell system designed is verified.Compared with the energy-oriented control strategy,the optimization strategy of electric-electric hybrid electric vehicle based on micro-variables fuzzy logic control designed in this paper has the power performance meeting the requirements of driving conditions.Under the initial operating condition of medium and low SOC of the auxiliary battery,the hydrogen consumption of 100 km decreased by 6.4% ~ 17.2%.The total energy utilization efficiency of the vehicle increased by 4.3% ~ 8.3%,so the economic performance of the vehicle was improved.And it provides a reference for the energy control method of fuel cell hybrid vehicles.