Influence of relaxation process on supercapacitor time response

This paper deals with the fractional order modelling of the supercapacitor voltage response for a given current profile. The model is obtained using the porous electrode theory applied on the supercapacitor case. In order to simplify the complexity of the model, it is assumed that there is no diffus...

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Bibliographic Details
Published in2009 13th European Conference on Power Electronics and Applications pp. 1 - 8
Main Authors Bertrand, N., Briat, O., Vinassa, J.-M., El Brouji, E.-H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2009
Subjects
Capacitance
Capacitors
Circuits
Electrodes
Frequency domain analysis
Hybrid electric vehicle (HEV)
Hybrid electric vehicles
Impedance
Measurement
Modelling
Power supply
Supercapacitor
Supercapacitors
Time factors
Voltage
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Summary:This paper deals with the fractional order modelling of the supercapacitor voltage response for a given current profile. The model is obtained using the porous electrode theory applied on the supercapacitor case. In order to simplify the complexity of the model, it is assumed that there is no diffusion process in the electrolyte. These assumption leads to neglect the supercapacitor self-discharge. So, we intend to combine both frequency and time identification methods. The differences on the obtained results show the importance of the experimental protocol. A numeric approach leads to estimate the supercapacitor initial state influence on the voltage response of a same model. An experiment is done on a 2000F/2.7 V element to validate the assumption done and the result allows estimating the current sign dependency of the capacitance.
ISBN:1424444322
9781424444328