Caractérisation par spectroscopie d'impédance de l'impédance complexe d'une pile à combustible en charge : Evaluation de l'influence de l'humidité

Abstract : This thesis deals with the characterization of the impedance of an on load fuel cell by Electrochemical Impedance Spectroscopy method and particularly the assessment of the humidity influence on the fuel cell performances. After a state of the art on different methods to characterize the impedance of a fuel cell and different methods of measuring humidity, the problem is posed. We model the PEM Nexa stack which consists of 47 cells, integrating experimental measurements. The dynamic model described in VHDL-AMS is a model at the macroscopic level, taking into account the electrical side of individual cells constituting the fuel cell. This model takes into account the characteristics of the last two cells exhibiting the phenomenon of flooding seen in experimental measurements. The purge system of the Nexa is also reflected in the code. The experimental study involves the establishment of a Testbench for characterizing the impedance of the Nexa fuel cell by Impedance spectroscopy method, and measuring the humidity at the output of the stack. The complex impedance measurements correlated with those of humidity led us to determine the influence of humidity on the performance of the fuel cell. The correlation between the model results and those of the Testbench, both in DC than in AC, are conclusive. The error in between theoretical and experimental results is less than 1.5%.
Document type :
Theses
Complete list of metadatas

Cited literature [19 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/tel-01748299
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 11:30:59 AM
Last modification on : Tuesday, March 12, 2019 - 3:51:59 PM
Long-term archiving on : Friday, September 14, 2018 - 12:20:54 AM

File

SCD_T_2009_0103_AGLZIM.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01748299, version 1

Collections

Citation

El Hassane Aglzim. Caractérisation par spectroscopie d'impédance de l'impédance complexe d'une pile à combustible en charge : Evaluation de l'influence de l'humidité. Autre. Université Henri Poincaré - Nancy 1, 2009. Français. ⟨NNT : 2009NAN10103⟩. ⟨tel-01748299⟩

Share

Metrics

Record views

56

Files downloads

517