New Full-Frequency-Range Supercapacitor Model With Easy Identification Procedure

Musolino, Vincenzo; Piegari, Luigi; Tironi, E.

doi:10.1109/tie.2012.2187412

Cited by 157 publications

(100 citation statements)

References 21 publications

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“…For example, some researchers have applied small-amplitude techniques such as impedance spectroscopy [57][58][59][60][61][62][63][64][65][66][67][68][69][70], while others have applied large-amplitude techniques such as cyclic voltammetry [71][72][73][74][75][76][77]. A few pioneers have even performed computer simulations [78][79][80][81][82][83][84][85][86][87][88][89][90].…”

Section: Introductionmentioning

confidence: 99%

A universal equivalent circuit for carbon-based supercapacitors

Fletcher

Black

Kirkpatrick

2013

J Solid State Electrochem

136

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A universal equivalent circuit is proposed for carbon-based supercapacitors. The circuit, which actually applies to all porous electrodes having non-branching pores, consists of a single vertical ladder network in series with an RC parallel network. This elegant arrangement explains the three most important shortcomings of present-day supercapacitors, namely open circuit voltage decay, capacitance loss at high frequency, and voltammetric distortion at high scan rate. It also explains the shape of the complex plane impedance plots of commercial devices and reveals why the equivalent series capacitance increases with temperature. Finally, the construction of a solid-state supercapacitor simulator is described. This device is based on a truncated version of the universal equivalent circuit, and it allows experimenters to explore the responses of different supercapacitor designs without having to modify real supercapacitors.

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Section: Introductionmentioning

confidence: 99%

A universal equivalent circuit for carbon-based supercapacitors

Fletcher

Black

Kirkpatrick

2013

J Solid State Electrochem

136

View full text Add to dashboard Cite

show abstract

“…A detailed description of the correlation between electrical circuit elements and the physical processes occurring within the cell during operation has been complete by numerous authors, [15,21,33]. The following works study the effect of transmission line length, [15], and the the number of RC branches, [34]. Figure 4 shows the evolution of the constituents of a pore within the electrode from an uncharged state to a fully charged state, and their representation in the model.…”

Section: Model Structuresmentioning

confidence: 99%

Electrochemical double layer capacitor electro-thermal modelling

Sarwar

Marinescu

Green

et al. 2016

Journal of Energy Storage

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Highlights An electro-thermal model is created which is valid from (-)40 → (+)60℃  A peudo-3D thermal model is developed to determine spatial temperature variation  Electrical equivalent circuit model retains physical meaning  Differing rates of heat generation are defined for the individual cell constituents  The temperature gradient between the core of the cell and surface is defined AbstractAn electro-thermal model is generated to predict the internal temperature of an Electrochemical Double-Layer Capacitor (EDLC) undergoing high current charging/discharging. The model is capable of predicting the electrical and thermal behaviour of a cell over a wide range of operating conditions. Spiral symmetry is used to reduce the heat generation and transfer model from 3D to a pseudo-3D, which runs faster without losing fidelity. Unlike existing models, each element in the developed model retains physical meaning and the electrical model is coupled with a high-fidelity thermal model including material geometries, thermal properties and air gaps. Unequal entropy is calculated using first principles, included in the model and compared to experimental data, and shown to be valid. More entropic heat is generated at the positive electrode than the negative in a typical EDLC, and there is little spatial variation of heat generation rate within the jelly-roll. The heat-transfer model predicts temperature variations within a cell; this study examines these variations for multiple conditions. Whilst undergoing high current charging (2 seconds, 400A, 650F cell), a temperature gradient in excess of 3.5℃ can be generated between the positive terminal and the jelly-roll. The time dependent spatial temperature distribution within a cell is explored.

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“…This model comes from the first branch in the EDLC model [24]. The apparent reason for only considering the first branch appears to be that an LIC's linear dependency on the discharging current is stronger than that of an EDLC.…”

Section: Previous Supercapacitor Modelsmentioning

confidence: 99%

Modeling of a Lithium-Ion Capacitor and Its Charging and Discharging Circuit in a Model-Based Design

Nakajo¹,

Aoki²,

Yatsuda³

et al. 2016

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For several years now, electric vehicles (EVs) have been expected to become widely available in the micro-mobility field. However, the insufficiency of such vehicles' battery-charging and discharging performance has limited their practical use. A hybrid energy storage system, which comprises a capacitor and battery, is a promising solution to this problem; however, to apply model-based designs, which are indispensable to embedded systems, such as the electronic control units used in EVs, a simple and accurate capacitor model is required. Within this framework, a lithium-ion capacitor (LIC) model is proposed, and its charging and discharging performances are evaluated against an actual LIC. The model corresponds accurately to the actual LIC, and the results indicate that the proposed LIC model will work well when used with Model-Based Design (MBD).

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New Full-Frequency-Range Supercapacitor Model With Easy Identification Procedure

Cited by 157 publications

References 21 publications

A universal equivalent circuit for carbon-based supercapacitors

A universal equivalent circuit for carbon-based supercapacitors

Electrochemical double layer capacitor electro-thermal modelling

Modeling of a Lithium-Ion Capacitor and Its Charging and Discharging Circuit in a Model-Based Design

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