The Impact of the Electric Double-Layer Capacitor (EDLC) in Reducing Stress and Improving Battery Lifespan in a Hybrid Energy Storage System (HESS) System
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Authors
Tshiani , Chrispin
Umenne, Patrice
Issue Date
2022-11-18
Type
Article
Language
en
Keywords
Battery lifespan , Battery Energy Storage System (BESS) , EDLC , Hybrid energy-storage system (HESS) , Python/MATLAB/Simulink (PMS)- Hybrid Model , Supercapacitor
Alternative Title
Abstract
This paper investigates the effect of the electric double layer capacitor (EDLC) in reducing
stress and prolonging the battery lifespan in a hybrid energy storage system (HESS). A 65 F, 16.2 V
EDLC supercapacitor was connected in a laboratory experiment to produce its charge/discharge
profile at a constant current of 5 and 10 A. The EDLC’s Faranda or “two branch model” mathematical
parameters were extracted from the experimental charge/discharge profile. The extracted parameters
were used as inputs to design the Python/MATLAB/Simulink (PMS)-hybrid model of the EDLC.
The charge/discharge profiles of the simulated PMS model of the EDLC were then compared to the
charge/discharge profiles derived from the experimental setup of the EDLC and were found to match.
The PMS model of the EDLC was then used as a subcomponent in an HESS system modelled in
MATLAB/Simulink. Using constant load conditions, the battery’s voltage, current, power and state
of charge (SOC) were analyzed for a battery energy storage system (BESS) without a supercapacitor
and then compared to an HESS system with a supercapacitor in an experimental setup. This process
was repeated with the simulated PMS model of the EDLC in MATLAB/Simulink for HESS and
without the EDLC for BESS. Finally using a variable load in an experimental setup, the battery’s
voltage and current were analyzed for a BESS system and compared to an HESS system. All these
data show that, in an HESS system with a supercapacitor, there is less stress on the battery with a load
applied. This is indicated by the voltage and current values in an HESS system being consistently
more stable with respect to time as compared to the BESS system. As a result, in an HESS system, the
battery will have a longer lifespan.
Description
Citation
Tshiani, C.T.; Umenne, P. The Impact of the Electric Double-Layer Capacitor (EDLC) in Reducing Stress and Improving Battery Lifespan in a Hybrid Energy Storage System (HESS) System. Energies 2022, 15, 8680. https:// doi.org/10.3390/en15228680
Publisher
MDPI
License
Journal
Volume
Issue
PubMed ID
DOI
ISSN
1996-1073