Modeling of a supercapacitor with a multibranch circuit

Logerais, Pierre‐Olivier; Camara, Mohamed Ansoumane; Riou, O.; Djellad, Abdelhak; Omeiri, Amar; Delaleux, Fabien; Durastanti, Jean-Félix

doi:10.1016/j.ijhydene.2015.06.037

Cited by 41 publications

(14 citation statements)

References 17 publications

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“…Modeling supercapacitors internal structure in electronic circuit software is a common field of study [17][18][19]. In [20] the voltage rebound effect, shorting and then switching to open circuit was also modeled.…”

Section: Discussionmentioning

confidence: 99%

On The Inverse Relaxation Approach To Supercapacitors Characterization

Kompan

Dudkin

2019

SSRN Journal

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A distributed internal RC structure is observed in electrical measurements of the supercapacitors. The distribution is caused by the hierarchical porous structure of the electrodes. In the present work an inverse relaxation technique is proposed to characterization of the internal RC structure. The technique allows to determine the ratio of "easy" and "hard" to access capacitances. The method consists in shorting a supercapacitor (initially charged to a U 0 ) for a short (lower than the internal RC) time τ , then switching to the open circuit regime and measuring an initial rebound U 1 and a long-time asymptotic U 2 . The main result is the possibility to find the ratio of "easy" and "hard" to access capacitances as η = (U 0 − U 2 )/(U 2 − U 1 ). This characteristic is an immanent characteristic of a supercapacitor, it is stable in several orders of τ range. The theory is implemented numerically and tested on a number of model structures. The models are then compared to temporal and impedance measurements of commercial supercapacitors of several manufacturers. The approach can be effectively applied to characterization of supercapacitors and other relaxation type systems with porous internal structure.

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Section: Discussionmentioning

confidence: 99%

On The Inverse Relaxation Approach To Supercapacitors Characterization

Kompan

Dudkin

2019

SSRN Journal

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“…Supercapacitor are often modelled using equivalent circuits composed of resistors and capacitors, including inductive elements which may become important at higher frequencies, both in the time and frequency domains [21]- [23]. Many literatures have studied the model of the supercapacitor cell, which are summarized in Fig.…”

Section: Equivalent Circuit Model Of Supercapacitor Cell Modulementioning

confidence: 99%

A parameters identification method of the equivalent circuit model of the supercapacitor cell module based on segmentation optimization

et al. 2020

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In practical settings, the supercapacitor is often used as the storage battery, which is composed of several supercapacitor cells in series. In order to accurately estimate the State of Charge (SoC) in the supercapacitor cell module, an equivalent model of supercapacitor cell module is invoked, which is expected to reflect the characteristics of supercapacitor cell module, especially the self-discharge characteristics during standing. The results of parameter identification directly affect the model accuracy. Hitherto, most supercapacitor equivalent models have been proposed for supercapacitor cells, but if the module equivalent model is characterized by connecting many equivalent models of supercapacitor cells in series, it would lead to the cumulative errors and the additional errors, which would incur errors in the parameter identification, and directly affect the model accuracy. The paper aims to obtain the accurate equivalent model parameters, the supercapacitor cell module is regarded as the object, the three-branch equivalent circuit model is established for the supercapacitor cell module, a discussion is given on the parameter identification methods about Circuit Analysis Method (CA) and Recursive Least Squares Method (RLS). This paper establishes the Simulink simulation model for the multi-method parameter identification of supercapacitor cell module, the simulation and analysis are performed to illustrate the advantages and disadvantages of CA and Circuit Analysis-Recursive Least Squares Method (CA-RLS). Then, it proposes a parameters identification method of the equivalent circuit model of supercapacitor cell module based on Segmentation Optimization (SO). The effectiveness of SO is verified by simulation and error analysis, the results indicate that SO can more effectively reflect the charging characteristics and self-discharge characteristics of the supercapacitor cell module. In particular, the comprehensive error in the static self-discharge phase is 0.28%, which is 6.83% and 0.64% lower than CA and CA-RLS, respectively.

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“…In a previous article, we proposed that the infinite r-C chains-based equivalent circuit model could describe the behavior of double layer UCs [13]. The multibranch r-C circuit modeling approach was also studied by other researchers [27][28][29][30][31][32][33]. The frequency-domain models comprise the best overall performance in terms of complexity, correctness, and robustness [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Studies on Dynamic Properties of Ultracapacitors Using Infinite r–C Chain Equivalent Circuit and Reverse Fourier Transform

et al. 2020

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The specific power storage capabilities of double-layer ultracapacitors are receiving significant attention from engineers and scientific researchers. Nevertheless, their dynamic behavior should be studied to improve the performance and for efficient applications in electrical devices. This article presents an infinite resistor–capacitor (r–C) chain-based mathematical model for the analysis of double layer ultracapacitors. The internal resistance and capacitance were measured for repetitive charging and discharging cycles. The magnitudes of internal resistance and capacitance showed approximately ±10% changes for charge-discharge processes. Electrochemical impedance spectroscopy investigations revealed that the impedance of a double-layer ultracapacitor does not change significantly in the temperature range of (−30 °C to +30 °C) and voltage range of (0.3376–2.736 V). The analysis of impedance data using the proposed mathematical model showed good agreement between the experimental and theoretical data. The dynamic behavior of the ultracapacitor was successfully represented by utilizing the proposed infinite r–C chains equivalent circuit, and the reverse Fourier transform analysis. The r–C electrical equivalent circuit was also analyzed using the PSIM simulation software to study the dynamic behavior of ultracapacitor parameters. The simulation study yields an excellent agreement between the experimental and calculated voltage characteristics for repetitive charging-discharging processes.

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Modeling of a supercapacitor with a multibranch circuit

Cited by 41 publications

References 17 publications

On The Inverse Relaxation Approach To Supercapacitors Characterization

On The Inverse Relaxation Approach To Supercapacitors Characterization

A parameters identification method of the equivalent circuit model of the supercapacitor cell module based on segmentation optimization

Studies on Dynamic Properties of Ultracapacitors Using Infinite r–C Chain Equivalent Circuit and Reverse Fourier Transform

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