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Analysis Process for Different Polymere Electrolyte Fuel Cell Stacks to Derive a Control Strategy Based on Impedance Data
Author(s) -
Keller S.,
Popenheim A.,
Hempel M.,
Gläsker K.,
Manoli Y.
Publication year - 2014
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201300271
Subject(s) - stack (abstract data type) , usable , electrical impedance , electrolyte , process (computing) , materials science , computer science , impedance control , chemistry , electrical engineering , engineering , electrode , operating system , world wide web , programming language
To further the development of polymer electrolyte membrane (PEM) fuel cells control strategies must be developed and optimized. In this study, an analysis process to derive a control strategy based on impedance data is developed and investigated. For this purpose an air cooled stack consisting of 12 cells and developed at Fraunhofer ISE was investigated. Impedance spectra were measured at different operating conditions to identify relevant frequencies at which an online control algorithm should be developed. A comparison of the impedance data between the analyzed stack and commercially available stacks of both air cooled and liquid cooled architectures suggest that the usable frequency ranges are independent of the stack. Hence, the presented analysis process is not limited to a specific stack design and yields a measure for the fuel cell's state of health that does not need information of a complete spectrum, but rather uses impedance data at a few discrete frequencies as control input.