The hydrogen fuel cell (HFC) vehicle is an important clean energy vehicle which has prospects for development. The behavior of the hydrogen fuel cell (HFC) vehicle power system, and in particular, the proton-exchange membrane fuel cell, has been extensively studied as of recent. The development of the dynamic system modeling technology is of paramount importance for HFC vehicle studies; however, it is hampered by the separation of the electrochemical properties and dynamic properties. In addition, the established model matching the follow-up control method lacks applicability. In attempts to counter these obstructions, we proposed an improved fuzzy (Proportional Integral Derivative) PID control method considering HFC voltage-output characteristics. By developing both the electrochemical and dynamic model for HFC vehicle, we can realize the coordinated control of HFC and power cell. The simulation results are in good agreement with the experimental results in the two models. The proposed control algorithm has a good control effect in all stages of HFC vehicle operation.
A reasonable electrochemical mechanism model is the basis for accurately describing the actual operation of hydrogen fuel cell (HFC). In this paper, a multidisciplinary modeling and simulation method is proposed. Based on the internal electrochemical reaction kinetics and electrochemical thermodynamics mechanism of the HFC, a voltage output model and a back pressure regulation model are constructed. By analyzing the relationship between the back pressure of the anode and cathode of the HFC and the effective partial pressure of the reactant gas, a voltage output model and back pressure adjustment model are integrated to form an HFC electrochemical mechanism model, which realizes the dynamic and accurate description of the HFC output performance. The final experimental results show that the electrochemical mechanism model of the HFC can achieve good results.
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