Study On Power Performance Matching And Hydrogen Safety Evaluation Of Additive Hydrogen Fuel Cell Vehicle

Nowadays,with the increasingly serious environmental pollution,haze and other environmental problems have come to the forefront of public opinion.The depletion of fossil energy and other energy crisis has become more serious.In this environment,new energy and other pollution-free cars naturally become the focus of the world’s major automobile manufacturers,among which electric cars stand out due to zero pollution in driving and other advantages.However,the problem of short driving range of new energy vehicles hindering its industrialization process.EFCV(Extended fuel cell vehicle)has two energy sources,namely fuel cell and battery.Working according to the set strategy can effectively improve the driving range of electric vehicles.At present,China’s research on the incremental fuel cell vehicle focuses on the optimization and matching of the vehicle’s power performance and the development and use of energy management strategies,while there are few studies on the hydrogen safety of the incremental fuel cell vehicle.Therefore,the research on power performance,energy management strategy and hydrogen safety of PLF vehicle has strong engineering practicability.Firstly,in this paper,the hybrid vehicle VEH_SMACH was modified,and the power system of the whole vehicle was redesigned.Fuel cell and battery were used as dual power sources,and then the verification was carried out according to the vehicle parameters and driving adhesion conditions in the M file.Then the motor parameters,battery parameters,fuel cell parameters and other power system parameters are matched according to the target design requirements.Secondly,this paper describes the advantages and disadvantages of conventional energy management strategies,such as power following strategy and switching control strategy.Then,based on MATLAB and ADVISOR simulation software,the ADVISOR set up the vehicle model and various parts models such as motor model,battery model and fuel cell model.According to the UDDS and NEDC of classical urban working conditions and the mixed working conditions of UDDS of classical urban working conditions and HWFET of high-speed working conditions as CYC_CON constructed by Trip Builder in the simulation software,the dynamic economy simulation test was carried out according to the energy management strategy formulated before.The results show that all aspects of performance are much higher than the set performance indicators,indicating that the selection of power system parameters and control strategy meets the requirements of hydrogen fuel cell vehicle.Thirdly,based on the model of hydrogen safety evaluation,this paper analyzes the hydrogen safety of the energy management strategy for incremental fuel cell vehicles.First acoording to the gradient theory will be divided into hydrogen safety gradient,and then choose four level of evaluation index and eight secondary rating index that subgoal layer,mceAHP hierarchical analysis software is used to determine the various index weight,the resulting hydrogen safety evaluation model.After that,the membership matrix of hydrogen security under the power following strategy was obtained through market research and simulation,and the hierarchical consistency test was conducted,so as to obtain the level of hydrogen security under the power following strategy.