论文信息 - EIS Method for the On-Board Evaluation of the Fuel Cell Impedance

EIS Method for the On-Board Evaluation of the Fuel Cell Impedance

In this paper a method for the on-line implementation of the Electrochemical Impedance Spectroscopy (EIS) of fuel cell (FC) systems is described. Differently from the laboratory applications, where the FC stack is analyzed with dedicated instrumentation and in well controlled conditions, the on-board EIS method requires to be properly adapted to the real operating condition of the FC system. In particular, the quality of the analog-front-end hardware used to acquire the FC voltage and current is a critical issue and the switching noise due to the power electronics connected to the FC stack, must be properly faced for obtaining reliable EIS results. The method has been verified by implementing the FC system and the EIS board in a circuital simulator: the numerical results in time domain, that are the FC voltage and current waveforms, have been post processed to calculate the impedance frequency spectrum. The latter has been compared with a FC dynamic model to verify the goodness of the proposed approach. The EIS elaboration chain has been also tested on the BeagleBone Black platform.

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