Electro-thermal modelling of a supercapacitor and experimental validation

Berrueta, Alberto; Martín, Idoia San; Hernández, Andoni; Ursúa, Alfredo

doi:10.1016/j.jpowsour.2014.02.089

Cited by 54 publications

(36 citation statements)

References 47 publications

(62 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each RC branch has a time constant that relates to the rearrangement of ions; charge re-distribution is a non-linear process, hence the greater the number of RC branches utilised, the lower this discrepancy will be, at the trade-off of greater complexity. 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].…”

Section: Model Structuresmentioning

confidence: 99%

“…A lumped thermal model as utilised many numerous authors, [18,21,47,48], typically provides a good estimate of the overall temperature rise, however it cannot account for the time taken for heat conduct from the core of the cell to the surface. As a result, the lumped model produces undamped results.…”

Section: Comparison With Existing Modelsmentioning

confidence: 99%

“…The few authors [17,21] who have combined electrical and thermal models to produce electro-thermal models have used lumped thermal models only. The models are capable of providing reasonable estimations of electrical performance and temperature change over a range of electrical and thermal conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The models are capable of providing reasonable estimations of electrical performance and temperature change over a range of electrical and thermal conditions. Berrueta et al [21] develop a temperature dependant electrical model, but ignore thermal gradients. The works of Parvini et al [17] do not constrain parameters within logical limits as their electrical model has a capacitance value 10-15 times greater than the capacitance of the cell.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electrochemical double layer capacitor electro-thermal modelling

Sarwar

Marinescu

Green

et al. 2016

Journal of Energy Storage

View full text Add to dashboard Cite

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.

show abstract

Section: Model Structuresmentioning

confidence: 99%

Section: Comparison With Existing Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical double layer capacitor electro-thermal modelling

Sarwar

Marinescu

Green

et al. 2016

Journal of Energy Storage

View full text Add to dashboard Cite

show abstract

“…Berrueta et al have developed an equivalent circuit including three branches to model the double layer effect for which the capacitance is linearly related with the voltage, the charge penetration and distribution in the electrode pores, and, the ion and electron conduction losses and membrane losses resulting from selfdischarge [24]. The basic two-branch model has been improved by Belhachemi [20,25] who suggested tenfolding the number of RC cells of the transmission line which depend on the terminal voltage enabling a fine description of the electrical and energy behavior for the shorter times.…”

Section: Introductionmentioning

confidence: 99%