Study On Power System Matching And Control Strategy Of The Extended Range Fuel Cell Electric Logistics Car

In recent years,the shortage of petroleum resources has become one of the serious problems we have to face due to the excessive use of petroleum resources.For the sake of solving the problem of fuel consumption of vehicles fundamentally,new energy vehicles had been come up.But early pure electric vehicles due to battery technology problems,the mileage is not good enough.In order to improve the range and don’t increase the intensity of environmental pollution at the same time,range extended electric cars are once put forward,which research heat never lessens.Plug-in electric cars,as the name suggests,are designed to increase mileage.There are various types of extenders,from the engine to the fuel cell.In this paper,hydrogen fuel cell is used as the extender.In addition,compared with the pure electric vehicles,power system of the range extended cars don’t have too much difference.The power system mainly consists of power battery system,fuel cell extender system,power driven system,the vehicle control system and the auxiliary power system(APU).The biggest difference is increasing the control of extender.That is to carry out the reasonable allocation of energy,so that it can achieve the goal of increasing range.In this paper,a range extended fuel cell electric logistics car is redesigned based on a domestic MPV car,and carried out the research.Firstly,the structure of the vehicle’s power system is determined,the selection of power system component and parameter matching.This includes a drive motor,a power battery and a fuel cell extender.Then,the ADVISOR software is used for preliminary verification.Secondly,in order to achieve the goal of the biggest range of the range extended fule cell electric logistics car,the vehicle energy management strategy has been researched.And then put forward a kind of power follow control strategy with fuzzy logic control to control the fuel cell extender to open.And with this method,it can maintain the li-battery SOC value,make the li-battery work with high efficiency at any time.Then,the MATLAB/Simulink software is used to carry on the modeling and simulation.Here,the difference between forward simulation and backward simulation is analyzed first.Then the driver model,the drive motor and controller model,lithium batteries model and fuel battery extendermodel are respectively established which are used to calculate the input/output parameters.And use the On/Off control strategy and power follow control strategy with fuzzy logic to have simulation comparison,the simulation results confirm the validity of this strategy,and under the power follow control strategy,logistics car braking energy recycling and the efficiency of fuel cell are all improved.That means the economy improved,and the power performance also has improved.the result of the simulation verifies the validity of the strategy preliminarily.Finally,the test results of the drum experiment show that the proposed entended range fuel cell electric logistics car’s structure is feasible,and the data prove the effectiveness and authenticity of the power following control strategy with fuzzy logic.