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Article Dans Une Revue IEEE Transactions on Power Electronics Année : 2009

Self-Discharge Characterization and Modeling of Electrochemical Capacitor Used for Power Electronics Applications

Yasser Diab
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Pascal Venet
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Gérard Rojat
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Résumé

The self-discharge of an electrochemical capacitor, also referred to as a supercapacitor, is an important factor in determining the duration of maintaining stored energy, especially in low-duty-cycle applications. The study of self-discharge is conducted as follows: first, the self-discharge is characterized by measuring the decline of open-circuit voltage of the electrochemical capacitor. Second, the mechanisms of self-discharge, leakage current, and diffusion of ions at the electrode-electrolyte interfaces are modeled by an electrical equivalent circuit. The equivalent circuit elements are experimentally determined according to the self-discharge time behavior. In addition, the dependence of the self-discharge parameters on both temperature and initial voltage across the electrochemical capacitor is described in detail.
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Dates et versions

hal-00368848 , version 1 (03-06-2009)

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Yasser Diab, Pascal Venet, Hamid Gualous, Gérard Rojat. Self-Discharge Characterization and Modeling of Electrochemical Capacitor Used for Power Electronics Applications. IEEE Transactions on Power Electronics, 2009, 24 (2), pp.510 - 517. ⟨10.1109/TPEL.2008.2007116⟩. ⟨hal-00368848⟩
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