1. Mathematical Modeling and Frequency-Domain Characteristics of a Periodic Pulse-Discharged Lithium-Ion Battery System.
- Author
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Lu, Junyong, Liu, Yingquan, Long, Xinlin, Yan, Kangwei, Liu, Lang, Zhou, Ren, and Wu, Yiting
- Subjects
LITHIUM-ion batteries ,MATHEMATICAL models ,HARMONIC analysis (Mathematics) ,BATTERY management systems ,LITHIUM cells ,FREQUENCY-domain analysis - Abstract
In order to study the unique dynamic behavior of the lithium-ion battery system in the periodic high-rate pulse discharge, a frequency-domain impedance model and a dynamic extraction method of impedance parameters are proposed. Moreover, a 24-kWh lithium battery system is built to carry out the pulse-discharged cycle experiment. The harmonic characteristics in high and low frequency pulse discharge are studied by harmonic analysis method. Besides, the impedance characteristics of the 24-kWh lithium battery system under different state-of-charge and different cycles are analyzed quantitatively. The results show some new characteristics and verify that the proposed frequency-domain impedance model and impedance extraction method are well qualified to analyze the frequency-domain characteristics and dynamic behavior of the periodic pulse-discharged lithium battery system. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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