 Comparison of the effect of linear and two-step fast charging protocols on degradation of lithium ion batteriesMeng Xu, Xia Wang, Liwen Zhang and Peng Zhao Energy, 2021, vol. 227, issue C Abstract: This work compares the effect of linear and two-step fast charging protocols on degradation of the Li-ion battery due to the solid electrolyte interphase (SEI) increase with the charging-discharging cycles based on an electrochemical and capacity fade coupled cell model. Since there is still a lack of knowledge regarding how the State of Charge (SOC) – dependent charging profile affects battery degradation, different slopes of the linear charging profile and different combinations of the charging current level for the two-step charging protocol are chosen as sample protocols representing the profiles varying with the SOC. The simulation results indicate that the two-step increasing charging protocol can achieve the lowest capacity fade ratio over 3000 cycles; the linear decreasing charging protocol can achieve the lowest charging voltage increase. The capacity fade due to the SEI layer increase in the negative electrode results in a shift of the stoichiometry coefficient cycling range and therefore a lower cell equilibrium potential and power performance. Keywords: Fast charging protocol; Charging current profile; Capacity fade model; Electrochemical model; Degradation; SEI increase (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:227:y:2021:i:c:s0360544221006666 DOI: 10.1016/j.energy.2021.120417 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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