A Multi-Channel Fast Impedance Spectroscopy Instrument Developed for Quality Assurance of Super-Capacitors

Farhan Farooq, Asad Khan, Seung June Lee, Mohammad Mahad Nadeem and Woojin Choi
Additional contact information
Farhan Farooq: Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea
Asad Khan: Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea
Seung June Lee: Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea
Mohammad Mahad Nadeem: Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea
Woojin Choi: Department of Electrical Engineering, Soongsil University, Seoul 06978, Korea

Energies, 2021, vol. 14, issue 4, 1-14

Abstract: Conventional experimental methods for testing the performance of super-capacitors include the measurement of capacitance through charge and discharge, measurement of equivalent series resistance (ESR) and measurement of self-discharge and the equivalent circuit model (ECM) by electrochemical impedance spectroscopy (EIS). However, the methods are not suitable for the mass production line of supercapacitors since they require a long time for the test and several kinds of different instrument. EIS is an attractive method to evaluate the performance of supercapacitors except that it takes a long time for a single test. In this paper a fast EIS instrument suitable for quality assurance for the mass production of supercapacitors is proposed. In order to reduce the time for the test, a multi-sine sweeping method is used for the EIS test and the results are analyzed by extracting the parameters of the ECM to evaluate the performance of the supercapacitors. The proposed instrument is developed to have multi-channel to further decrease the time for the test with a supercapacitor. It is also presented as to how the extracted parameter values of the ECM can be used to evaluate the performance of the supercapacitor.

Keywords: electrochemical impedance spectroscopy; equivalent circuit analysis; super-capacitors; digital lock-in amplifier; multi sine super imposed method; multi-channel (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 references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/4/1139/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/4/1139/ (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:4:p:1139-:d:503179

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 ().