Magnetic Coupling-Based Battery Impedance Measurement Method

Chushan Li, Junjie Mao, Qiang Wu, Yibo Deng, Jiande Wu, Wuhua Li and Xiangning He
Additional contact information
Chushan Li: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China
Junjie Mao: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China
Qiang Wu: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China
Yibo Deng: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China
Jiande Wu: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China
Wuhua Li: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China
Xiangning He: College of Electrical Engineering, Zhejiang University, Hangzhou 310081, China

Energies, 2021, vol. 14, issue 22, 1-11

Abstract: The battery impedance is an important indicator of battery health status. In this paper, a magnetic coupling-based impedance measurement method for electrochemical batteries is proposed. Without affecting the energy injection stage, the designed suppression resistance can minimize the influence of the primary circuit response, and the under-damped oscillation waveform containing the battery impedance information can be directly obtained on the primary inductance. The change of the mutual inductance value within a certain range will not affect the measurement results. Therefore, the measurement system has high stability and robustness. By utilizing the discrete Fourier transform (DFT)-based algorithm to calculate the damped oscillation parameters, the battery impedance is accurately derived from the calculated attenuation coefficient and damped oscillation frequency. The accuracy of this method under different coupling parameters is analyzed and verified by simulation and experiment on a Li-ion battery, which could be employed to estimate the state of charge (SOC).

Keywords: battery impedance; magnetic coupling; discrete Fourier transform; damped oscillation; state of charge (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/22/7490/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/22/7490/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:22:p:7490-:d:675491

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().