Dynamic characterization of small lead-acid cells

Citation
A. Salkind et al., Dynamic characterization of small lead-acid cells, J POWER SOU, 96(1), 2001, pp. 151-159
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics","Environmental Engineering & Energy
Journal title
JOURNAL OF POWER SOURCES
ISSN journal
0378-7753 → ACNP
Volume
96
Issue
1
Year of publication
2001
Pages
151 - 159
Database
ISI
SICI code
0378-7753(20010601)96:1<151:DCOSLC>2.0.ZU;2-L
Abstract
Three sizes of small valve regulated (VRLA) commercially available lead-aci d cells were investigated and characterized for their dynamic properties by ac impedance spectroscopy and other electrochemical techniques. All cells were of the limited electrolyte type and no additional electrolyte was intr oduced during the studies. The data indicates a very significant increase in cell impedance at lower s tates of charge, as expected. In charging studies close to the fully charge d state, some unexpected impedance data were observed. Complex impedance plots indicate a passive film formation, probably associa ted with the recombination surface film. The investigations included cells in various states of charge as well as cycling history including positional orientation studies. Equivalent circuits were derived from ac impedance sp ectroscopy and the parameters studied as a function of the cell's state-of- charge. Furthermore, the voltage response of the cells was theoretically ge nerated from the ac impedance spectroscopy using Fourier transform analysis and found to be similar to the measured cell responses. (C) 2001 Published by Elsevier Science B.V.