Frequency, thermal and voltage supercapacitor characterization and modeling

F. Rafik (1) , H. Gualous (2) , R. Gallay (3) , A. Crausaz (1) , A. Berthon (2)

1 HEPIA - Haute Ecole du Paysage, d'Ingénierie et d'Architecture de Genève
2 L2ES - Laboratoire de recherche en Electronique, Electrotechnique et Systèmes
3 MAXWELL Technologies [Rossens]

A simple electrical model has been established to describe supercapacitor behaviour as a function of frequency, voltage and temperature for hybrid vehicle applications. The electrical model consists of 14 RLC elements, which have been determined from experimental data using electrochemical impedance spectroscopy (EIS) applied on a commercial supercapacitor. The frequency analysis has been extended for the first time to the millihertz range to take into account the leakage current and the charge redistribution on the electrode. Simulation and experimental results of supercapacitor charge and discharge have been compared and analysed. A good correlation between the model and the EIS results has been demonstrated from 1 mHz to 1 kHz, from −20 to 60 °C and from 0 to 2.5 V.

Keywords: Supercapacitor dynamic behavior; Supercapacitor thermal characterization; Supercapacitor modeling

Domains: Engineering Sciences [physics]; Environmental Sciences; Physics [physics]; Engineering Sciences [physics]; Materials; Engineering Sciences [physics]; Reactive fluid environment

F. Rafik, H. Gualous, R. Gallay, A. Crausaz, A. Berthon. Frequency, thermal and voltage supercapacitor characterization and modeling. Journal of Power Sources, 2007, 165 (2), pp.928-934. ⟨10.1016/j.jpowsour.2006.12.021⟩. ⟨hal-02157802⟩