Supercapacitors Characterization and Modeling Using Combined Electro-Thermal Stress Approach Batteries
Résumé
This paper presents the supercapacitors (SC) behavior characterization using the temperature combined to the frequency of the dc-current ripples called here electro-thermal stress. To characterize the evolution of the resistance and the capacitance of the SC, the authors have evaluated the impact of the state of charge (SoC), the number of cycles, the temperature, and the temperature combined to the frequency of the dc-current ripples. This approach enables to show the variations of the SCs resistance and capacitance according to the real constraints imposed by application. The main contribution of this paper is focused on the SCs aging characterization and modeling, using the electro-thermal stress. The experimental tests of the SC characterization and modeling are based on the charge/discharge operations, using the fluctuating and no-fluctuating dc-current waveforms. The proposed model takes into account the variations of the resistance and capacitance of the SC according to the temperature, the frequency of dc-current ripples and the SoC. The terminal voltage of the SC obtained from the proposed model is close to the experimental result, with an error about 1%. So, the proposed model is satisfactory to predict the SCs behavior during the charge/discharge operations using a fluctuating dc-current combined to a variable temperature and SoC.
Mots clés
Capacitance variation
electro-thermal stress
frequency of the dc-current ripples
impact of the number of cycles
resistance variation
supercapacitor (SC) characterization
SC modeling
state of charge (SoC)
temperature impact
ageing
electric resistance
secondary cells
supercapacitors
thermal stresses
SoC
variable temperature
electro-thermal stress approach batteries
supercapacitors behavior characterization
dc-current ripples
SCs aging characterization
no-fluctuating dc-current waveforms
state of charge
SCs capacitance
SCs resistance
charge-discharge operations