Detail publikace

Supercapacitor equivalent electrical circuit model based on charges redistribution by diffusion

SEDLÁKOVÁ, V. ŠIKULA, J. MAJZNER, J. SEDLÁK, P. KUPAROWITZ, T. BUERGLER, B. VAŠINA, P.

Originální název

Supercapacitor equivalent electrical circuit model based on charges redistribution by diffusion

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

A new method for the determination of parameters for an equivalent electrical circuit model of supercapacitors is proposed. The method is based on the evaluation of the time dependence of voltage measured on the supercapacitor terminals after its charging by a defined current pulse. The measured time dependence of the voltage is fitted by an exponential function, where the exponent is proportional to the square root of time. This term reflects the redistribution of charges by diffusion inside the supercapacitor structure. The equivalent electrical circuit of supercapacitors is described by five parameters – two capacitors and three resistors. One capacitor corresponds to the Helmholtz capacitance, which is charged immediately with the time constant in the order of hundreds milliseconds, while the second one represents the diffuse capacitance, which is charged with the time constant in the order of hundreds seconds. The two resistors in the equivalent circuit model represent the equivalent series resistance and the leakage resistance, respectively, while the third resistor describes the resistance for charge diffusion in the supercapacitor structure. This resistance is time dependent and a way for calculating its value is demonstrated.

Klíčová slova

Supercapacitor; Helmholtz capacitance; Diffuse capacitance; Equivalent circuit model

Autoři

SEDLÁKOVÁ, V.; ŠIKULA, J.; MAJZNER, J.; SEDLÁK, P.; KUPAROWITZ, T.; BUERGLER, B.; VAŠINA, P.

Rok RIV

2015

Vydáno

14. 4. 2015

Nakladatel

ELSEVIER

ISSN

0378-7753

Periodikum

Journal of Power Sources

Ročník

2015

Číslo

286

Stát

Nizozemsko

Strany od

58

Strany do

65

Strany počet

8

URL

http://www.sciencedirect.com/science/article/pii/S0378775315005467

BibTex

@article{BUT114111,
  author="Vlasta {Sedláková} and Josef {Šikula} and Jiří {Majzner} and Petr {Sedlák} and Tomáš {Kuparowitz} and Brandon {Buergler} and Petr {Vašina}",
  title="Supercapacitor equivalent electrical circuit model based on charges redistribution by diffusion",
  journal="Journal of Power Sources",
  year="2015",
  volume="2015",
  number="286",
  pages="58--65",
  doi="10.1016/j.jpowsour.2015.03.122",
  issn="0378-7753",
  url="http://www.sciencedirect.com/science/article/pii/S0378775315005467"
}