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Title: Energy efficiency analysis as a function of the working voltages in supercapacitors
Authors: Quintana, Jose J. 
Ramos, Alejandro 
Diaz, Moises 
Nuez, Ignacio 
UNESCO Clasification: 3307 Tecnología electrónica
Keywords: Energy Efficiency
Energy Storage
Issue Date: 2021
Journal: Energy 
Abstract: Supercapacitors are increasingly used as energy storage elements. Unlike batteries, their state of charge has a considerable influence on their voltage in normal operation, allowing them to work from zero to their maximum voltage. In this work, a theoretical and practical analysis is proposed of the energy efficiency of these devices according to their working voltages. To this end, several supercapacitors were subjected to charge and discharge cycles until the measurements of current and voltage stabilized. At this point their energy efficiency was calculated. These charge-discharge cycles were carried out: i) without rest between charging and discharging; and ii) with a rest of several minutes between the two stages. Using the information obtained from the tests, the energy efficiency is shown plotted against the minimum and maximum working voltages. By consulting the data and the graphs, the ideal working voltages to optimize the energy efficiency of these devices can be obtained.
ISSN: 0360-5442
DOI: 10.1016/
Source: Energy [ISSN 0360-5442], v. 230, 120689, (Septiembre 2021)
Appears in Collections:Artículos
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