Abstract
This paper addresses an adaptive temperature control problem for preventing the membrane dehydration and electrode flooding of nonlinear proton exchange membrane fuel cells (PEMFCs). Compared with the previous thermal control results of PEMFC temperature systems, the main contributions of this paper are two-fold: (i) nonlinear thermal management systems with nonlinear coolant circuit dynamics are firstly adopted in the temperature control field of PEMFCs and (ii) temperature constraints are considered to avoid the membrane dehydration and electrode flooding phenomena of PEMFCs. It is assumed that all system parameters and nonlinearities of thermal management systems including nonlinear coolant circuit dynamic are unknown. A recursive control design methodology is presented to guarantee the robust regulation and constraint satisfaction of the stack temperature. From the Lyapunov theorem, the stability of the resulting closed-loop system is analyzed.
Highlights
Proton exchange membrane fuel cells (PEMFCs) have been regarded as one of the most attractive alternative energy sources in the future because of their advantages such as low operating temperature, high energy efficiency, short charging time, and less noise [1], [2]
The control of thermal management system is important for the general operation of proton exchange membrane fuel cells (PEMFCs) in the electrochemical reaction
We present an approximation-based temperature control design to deal with the membrane dehydration and electrode flooding problems of uncertain nonlinear PEMFCs
Summary
Proton exchange membrane fuel cells (PEMFCs) have been regarded as one of the most attractive alternative energy sources in the future because of their advantages such as low operating temperature, high energy efficiency, short charging time, and less noise [1], [2]. A fault-tolerant control approach using the sliding mode technique was presented for thermal management systems of PEMFCs with sensor faults [8] These control strategies [5]–[8] were established without the consideration of coolant circuit models that are important for adjusting the stack temperature of PEMFCs. Basically, PEMFCs provide electricity by an electrochemical exothermic reaction using the oxygen and hydrogen, and the heat generated at this time should be removed by a cooling system [9]. Compared with the existing works [5]–[8], [11]–[17], this paper firstly considers the coolant-circuit-based uncertain nonlinear thermal management systems in the temperature control field of PEMFCs where all system parameters and nonlinearities are unknown.
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