56833 20200221144125.0 doi 10.1016/j.jpowsour.2015.09.122 sideral 92314 ART-2016-92314 eng (orcid)0000-0002-4834-940X Oyarbide, E. Universidad de Zaragoza Voltage equalization of an ultracapacitor module by cell grouping using number partitioning algorithm 2016 Access copy available to the general public Unrestricted Ultracapacitors are low voltage devices and therefore, for practical applications, they need to be used in modules of series-connected cells. Because of the inherent manufacturing tolerance of the capacitance parameter of each cell, and as the maximum voltage value cannot be exceeded, the module requires inter-cell voltage equalization. If the intended application suffers repeated fast charging/discharging cycles, active equalization circuits must be rated to full power, and thus the module becomes expensive. Previous work shows that a series connection of several sets of paralleled ultracapacitors minimizes the dispersion of equivalent capacitance values, and also the voltage differences between capacitors. Thus the overall life expectancy is improved. This paper proposes a method to distribute ultracapacitors with a number partitioning-based strategy to reduce the dispersion between equivalent submodule capacitances. Thereafter, the total amount of stored energy and/or the life expectancy of the device can be considerably improved. info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 6.395 2016 CHEMISTRY, PHYSICAL 22 / 145 = 0.152 2016 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 31 / 275 = 0.113 2016 Q1 T1 ENERGY & FUELS 8 / 92 = 0.087 2016 Q1 T1 ELECTROCHEMISTRY 2 / 29 = 0.069 2016 Q1 T1 1.944 2016 Electrical and Electronic Engineering 2016 Q1 Renewable Energy, Sustainability and the Environment 2016 Q1 Physical and Theoretical Chemistry 2016 Q1 Energy Engineering and Power Technology 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0001-9334-4870 Bernal, C. Universidad de Zaragoza (orcid)0000-0002-4592-769X Molina, P. Universidad de Zaragoza Jiménez, L.A. Gálvez, R. Martínez, A. 5008 785 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Tecnología Electrónica 301 (2016), 113-121 J. power sources JOURNAL OF POWER SOURCES 0378-7753 286083 http://zaguan.unizar.es/record/56833/files/texto_completo.pdf Postprint 122076 http://zaguan.unizar.es/record/56833/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:56833 articulos driver 2020-02-21-13:03:12 ARTICLE