Impact of Relaxation Time on Electrochemical Impedance Spectroscopy Characterization of the Most Common Lithium Battery Technologies—Experimental Study and Chemistry-Neutral Modeling
| Autor: | Joeri Van Mierlo, Rahul Gopalakrishnan, Sazzad Hosen, Maitane Berecibar, Theodoros Kalogiannis, Joris Jaguemont |
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| Přispěvatelé: | Electrical Engineering and Power Electronics, Electromobility research centre, Faculty of Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
State of health 020209 energy chemistry.chemical_element impedance growth EIS study 02 engineering and technology 0202 electrical engineering electronic engineering information engineering Electrical impedance TA1001-1280 business.industry aging 021001 nanoscience & nanotechnology Lithium battery TK1-9971 Dielectric spectroscopy Transportation engineering State of charge chemistry relaxation behavior Automotive Engineering Optoelectronics Lithium Electrical engineering. Electronics. Nuclear engineering chemistry-neutral modeling 0210 nano-technology Energy source business |
| Zdroj: | World Electric Vehicle Journal Volume 12 Issue 2 World Electric Vehicle Journal, Vol 12, Iss 77, p 77 (2021) |
| ISSN: | 2032-6653 |
| DOI: | 10.3390/wevj12020077 |
| Popis: | In electrified vehicle applications, understanding the battery characteristics is of great importance as it is the state-of-art principal energy source. The key battery parameters can be identified by one of the robust and nondestructive characterization techniques, such as electrochemical impedance spectroscopy (EIS). However, relaxing the battery cell before performing the EIS method is crucial for the characterization results to be standardized. In this study, the three most common and commercially available lithium-ion technologies (NMC/graphite, LFP/graphite, NCA/LTO) are investigated at 15–45 °C temperature, in the range of 20–80% state of charge (SoC) and in fresh and aged state of health (SoH) conditions. The analysis shows that the duration of the relaxation time before impedance measurement has an impact on the battery’s nonlinear behavior. A rest time of 2 h can be proposed, irrespective of battery health condition, considering neutral technology-based impedance measurement. An impedance growth in ohmic and charge transfer characteristics was found, due to aging, and the effect of rest periods was also analyzed from an electrochemical standpoint. This experimental data was fitted to develop an empirical model, which can predict the nonlinear dynamics of lithium technologies with a 4–8% relative error for longer rest time. |
| Databáze: | OpenAIRE |
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