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Proceedings ArticleDOI

Comparison of ultracapacitor electric circuit models

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TLDR
In this article, three basic RC network models are discussed in detail, including modeling ideas, circuit formation, linear/nonlinear factors and evaluations of each model, and recommendations of ultracapacitor selection strategies are provided.
Abstract
Due to ultracapacitorspsila unique features, the electrical performances and reliabilities of electrical systems using ultracapacitors can be improved. It is important to have a good ultracapacitor model for simulation and assisting electrical system design and product development. Several kinds of ultracapacitor models are given these years. Especially, electric circuit models are the interested ones for electrical engineers. This paper concentrates on the electric circuit model. Three basic RC network models are discussed in detail, including modeling ideas, circuit formation, linear/nonlinear factors and evaluations of each model. The general electric circuit model considering the inductance and leakage current effects are given. Model selection depends on the specific applications of ultracapacitor. Based on the analysis in this paper, recommendations of ultracapacitor selection strategies are provided.

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A review on electrochemical double-layer capacitors

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Physical Interpretations of Nyquist Plots for EDLC Electrodes and Devices

TL;DR: In this paper, a physicochemical transport model was used for numerically reproducing Nyquist plots accounting for electric double layer (EDL) formation at the electrode/electrolyte interface, charge transport in the electrode, and ion electrodiffusion in binary and symmetric electrolytes.
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Hybrid renewable energy systems for power generation in stand-alone applications: A review

TL;DR: A comprehensive review of the research in this area in the past one decade is presented in this paper, where an attempt has been made to present a comprehensive review on the research on the unit sizing, optimization, energy management and modeling of hybrid renewable energy system components.
Journal ArticleDOI

Measurement of Supercapacitor Fractional-Order Model Parameters From Voltage-Excited Step Response

TL;DR: A numerically solved least squares fitting process is proposed to estimate the impedance parameters of a fractional order model of supercapacitors from their voltage excited step response, without requiring direct measurement of the impedance or frequency response.
Journal ArticleDOI

Fractional-order models of supercapacitors, batteries and fuel cells: a survey

TL;DR: In this paper, a survey of fractional-order electric circuit models that have been reported in the literature to best fit experimentally collected impedance data from energy storage and generation elements, including super-capacitors, batteries, and fuel cells is presented.
References
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Journal ArticleDOI

Principles and applications of electrochemical capacitors

TL;DR: In this article, the fundamental principles, performance, characteristics, present and future applications of electrochemical capacitors are presented in this communication, and different applications demanding large ECs with high voltage and improved energy and power density are under discussion.
Journal ArticleDOI

On porous electrodes in electrolyte solutions: I. Capacitance effects☆

TL;DR: In this paper, a unified and generally applicable treatment for the individual or combined effects of double layer capacitance and faradaic process in a.c. measurements is given for the diffusion coupled with a fast or a first-order slow electrode reaction.
Journal ArticleDOI

Characterization of double-layer capacitors (DLCs) for power electronics applications

TL;DR: In this article, the double-layer capacitor (DLC) for power applications is presented, and an equivalent circuit model consisting of three RC branches, one of them with a voltage-dependent capacitance is presented.
Journal ArticleDOI

On porous electrodes in electrolyte solutions—IV

TL;DR: In this paper, a simple theory proposed on the basis of a transmission-line model is shown to account fully for the ac behaviour of a brush electrode, and the rate-determining process at such an electrode may conveniently be studied either by direct comparison with theoretical predictions for a pore or by using a squared representation, leading to the same plots as obtained from flat electrodes.
Proceedings ArticleDOI

Modeling the dynamic behavior of supercapacitors using impedance spectroscopy

TL;DR: In this article, a new approach of modeling the dynamic behavior of supercapacitors using impedance spectroscopy is presented, which can be used in simulating the voltage response and energy efficiency, e.g., for automotive power systems.
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