Research Of Control Strategy On Thermal Management System Of Proton Exchange Membrane Fuel Cell

Proton exchange membrane fuel cell is a promising direction in hydrogen fuel cell technology.It has the characteristics of low operating temperature,high power generation efficiency and environmental friendliness.In this paper,research on the control strategy of the thermal management system of the proton exchange membrane fuel cell is carried out for the proton exchange membrane fuel cell heavy-duty truck produced by a commercial vehicle company.In this paper,the current domestic and foreign proton exchange membrane fuel cell literature research is carried out,and then the voltage model of the proton exchange membrane fuel cell is designed and verified according to the research results.Combined with the thermal balance of the proton exchange membrane fuel cell and the parameters of the real thermal management system components,the model is built in the MATLAB/Simulink environment,and the feasibility of the model is proved by the data of the real vehicle test.The PID controller of the thermal management system of the proton exchange membrane fuel cell is designed using this model.According to the simulation results of the controller,an improved scheme of the fuzzy PID control strategy on the pump side is further proposed.Comparing the simulation of the two controllers,the maximum overshoot of the fuzzy PID controller on the pump side is reduced by 2.5°C,and the adjustment time is reduced by 77.6s,138.8s and 98.6s respectively under different current changes,and the control performance has been improved to a certain extent..Then,the road test and controller verification experiment of a fuel cell heavy truck were carried out,and the data processing was carried out through the communication protocol,and the fuel cell current and voltage signals,vehicle speed signals,hydrogen and air pressure signals,and cooling water temperature signals were obtained.The modeling of the management system model and the design of the controller provide data support.Finally,the control effect of the designed fuel cell thermal management system controller is tested and analyzed.The data shows that compared with the PID controller,the fuzzy PID controller on the pump side reduces the number of overshoots by 5°C,and the fluctuation of the temperature difference is reduced by 0.4°C.