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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
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Electronics 2020, 9(1), 78;
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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