Fuel cell operation under degraded working modes and study of a diode by-pass circuit dedicated to multi-stack association
CANDUSSO ; DE-BERNARDINIS ; PERA ; HAREL ; FRANCOIS ; HISSEL ; COQUERY ; KAUFFMANN
Type de document
ARTICLE A COMITE DE LECTURE REPERTORIE DANS BDI (ACL)
Langue
anglais
Auteur
CANDUSSO ; DE-BERNARDINIS ; PERA ; HAREL ; FRANCOIS ; HISSEL ; COQUERY ; KAUFFMANN
Résumé / Abstract
To make fuel cells commercially viable in the transportation sector, it becomes now crucial to develop some technical concepts which allow the continuation of operation of multi stack generator even if one stack fails. The present work addresses this problem and the paper presents some studies related with the electrical behaviour of a polymer electrolyte fuel cell operated under fault condition and equipped with an anti-parallel diode used as a by-pass circuit. Some experimental results are obtained using a two cell stack placed in a set-up that reproduces the coupling in series of two fuel cell stacks. These results allow the evaluation of by-pass diode solutions in the case of fuel cell specific degraded working modes, such as the break of the gas reactant feeding. The impacts of the starvation phenomenon over the stack performances are analysed and commented from characterization data obtained in particular by electrochemical impedance spectroscopy. Some extrapolation and extension of the first experimental investigations are done with the aim of preparing the next association of higher power stacks operated with their reverse diodes. The proposed experimental and modelling works show that the value of the stack impedance will have a key-role in the triggering of the diode conduction. Keywords: Polymer Electrolyte Fuel Cell, stack coupling, power electronics architecture, reverse diode, degraded working modes, transport applications.
Source
Energy Conversion and Management, num. Vol49, n4, p880-895 p.
Editeur
Elsevier
