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Energetical modeling of lithium-ion batteries including electrode porosity effects / Urbain, M. in IEEE transactions on energy conversion, Vol. 25, N° 3 (Septembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 862 - 872 Titre : Energetical modeling of lithium-ion batteries including electrode porosity effects Type de document : texte imprimé Auteurs : Urbain, M., Auteur ; Hinaje, M., Auteur ; Raël, S., Auteur Année de publication : 2011 Article en page(s) : pp. 862 - 872 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Electrochemical  electrodes;  lithium;  porosity;  secondary  cells Résumé : All electrochemical batteries are characterized by an electrical behavior that depends on temperature, state of charge, and current. In the case of lithium-ion accumulators, the energetical behavior is moreover deeply marked by line effects, due to the porosity of both electrodes. This paper deals with investigations on an accurate energetical modeling of lithium-ion battery. It is shown in particular that electrode porosity can be taken into account by means of a diffusion impedance represented by a capacitive transmission line. An energetical model, which couples this line with a current independent capacitance, is proposed and characterized at constant temperature (20°C) over different state-of-charge intervals (5%) and for different currents. Reactant diffusion within the electrolyte and relaxation period after discharge are investigated as well. Validation tests carried out on a 6.8-Ah lithium-ion element are conclusive. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5484532&sortType%3Das [...] [article] Energetical modeling of lithium-ion batteries including electrode porosity effects [texte imprimé] / Urbain, M., Auteur ; Hinaje, M., Auteur ; Raël, S., Auteur . - 2011 . - pp. 862 - 872. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 862 - 872 Mots-clés : Electrochemical  electrodes;  lithium;  porosity;  secondary  cells Résumé : All electrochemical batteries are characterized by an electrical behavior that depends on temperature, state of charge, and current. In the case of lithium-ion accumulators, the energetical behavior is moreover deeply marked by line effects, due to the porosity of both electrodes. This paper deals with investigations on an accurate energetical modeling of lithium-ion battery. It is shown in particular that electrode porosity can be taken into account by means of a diffusion impedance represented by a capacitive transmission line. An energetical model, which couples this line with a current independent capacitance, is proposed and characterized at constant temperature (20°C) over different state-of-charge intervals (5%) and for different currents. Reactant diffusion within the electrolyte and relaxation period after discharge are investigated as well. Validation tests carried out on a 6.8-Ah lithium-ion element are conclusive. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5484532&sortType%3Das [...]