Battery Dynamics Exploration: Insights and Implications of Relaxation Time in Electrochemical Impedance Spectroscopy

S. Azizighalehsari*, Z. Ning, B. Breazu, P. Venugopal, G. Rietveld, T. Batista Soeiro

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
58 Downloads (Pure)

Abstract

Understanding Li-ion batteries' dynamic and complex electrochemical behavior presents significant challenges in battery diagnostics and prognostics. To deal with these challenges, researchers rely on electrochemical impedance spectroscopy (EIS), which offers valuable insights into the electrochemical phenomena within the battery. This paper investigates the significance of resting or relaxation time in obtaining stable and reproducible EIS measurements. This paper identifies the impact of battery rest time by analyzing the voltage and temperature behavior for different impulse discharge rates at various battery states of charge (SOC) levels. In addition, the influence of test current level and battery rest time on EIS measurements is studied. Adequate rest time enables the battery to reach a stable equilibrium, minimizing transient effects and ensuring reproducibility. At the same time, optimal current amplitude selection enhances the signal-to-noise ratio and facilitates accurate impedance spectrum interpretation, minimizing the influence on the battery state. The findings of our study improve the accuracy and reliability of battery diagnostics and contribute to the understanding of battery system dynamics.

Original languageEnglish
Title of host publication2023 IEEE 8th Southern Power Electronics Conference and 17th Brazilian Power Electronics Conference (SPEC/COBEP)
Place of PublicationPiscataway, NJ
PublisherIEEE
ISBN (Electronic)979-8-3503-2112-8
ISBN (Print)979-8-3503-2113-5
DOIs
Publication statusPublished - 2023
Event8th Southern Power Electronics Conference and the 17th Brazilian Power Electronics Conference, SPEC/COBEP 2023 - Florianopolis, Brazil
Duration: 26 Nov 202329 Nov 2023
Conference number: 6

Publication series

NameIEEE 8th Southern Power Electronics Conference and Brazilian Power Electronics Conference (SPEC/COBEP)
PublisherIEEE
Volume2023
ISSN (Print)2832-2983
ISSN (Electronic)2832-2983

Conference

Conference8th Southern Power Electronics Conference and the 17th Brazilian Power Electronics Conference, SPEC/COBEP 2023
Abbreviated titleSPEC/COBEP
Country/TerritoryBrazil
CityFlorianopolis
Period26/11/2329/11/23

Keywords

  • Electrochemical Impedance Spectroscopy (EIS)
  • Li-ion batteries
  • Measurement
  • Relaxation Time
  • State of Charge (SOC)
  • 2024 OA procedure

Fingerprint

Dive into the research topics of 'Battery Dynamics Exploration: Insights and Implications of Relaxation Time in Electrochemical Impedance Spectroscopy'. Together they form a unique fingerprint.

Cite this