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Open AccessFeature PaperArticle

Improvement of an Equivalent Circuit Model for Li-Ion Batteries Operating at Variable Discharge Conditions

Department of Engineering, University Roma Tre, Via Vito Volterra 62b, 00146 Rome, Italy
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Electronics 2020, 9(1), 78; https://doi.org/10.3390/electronics9010078
Received: 9 December 2019 / Accepted: 25 December 2019 / Published: 1 January 2020
(This article belongs to the Section Power Electronics)
A real time simulation of battery conditions is an essential step in the development of energy harvesting devices. Since it is not possible to have a direct measurement, the battery information, such as the remaining charge, need to be estimated by means of model-based estimation algorithms. Most of the existing models describing battery behaviour, are suitable only for a constant discharge current. This paper proposes a study of the dependence of the equivalent circuit model parameters on different discharge conditions. The model presented provides a powerful tool to represent the batteries’ behaviour in energy harvesting systems, involving continuous charge and discharge cycles. The extraction of parameters was performed, starting from a set of reference curves generated in Matlab Simulink environment, referring to Li-ion technology batteries. The parameters were extracted by means of a cascade of global and local search identification algorithms. Finally, the relations describing parameters’ behaviours as functions of the discharge current are presented. View Full-Text
Keywords: battery; circuital model; identification model battery; circuital model; identification model
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Lozito, G.M.; Lucaferri, V.; Riganti Fulginei, F.; Salvini, A. Improvement of an Equivalent Circuit Model for Li-Ion Batteries Operating at Variable Discharge Conditions. Electronics 2020, 9, 78.

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