中文版 | English
CSpace
Investigation and Improvement of Test Methods for Capacitance and DCESR of EDLC Cells
Xie, Xiong1,2,3; Li, Xu2,4; Xu, Junqiang3; Dong, Lichun1
2023-05-12
摘要The quick and accurate characterization of commercial electrochemical double-layer capacitor (EDLC) cells, especially their capacitance and direct-current equivalent series internal resistance (DCESR), is of great significance for the design, maintenance, and monitoring of EDLCs used in areas of energy, sensors, electric power, construction machinery, rail transit, automobile transportation, and military. In this study, the capacitance and DCESR of three commercial EDLC cells with similar performance were determined and compared by following the three commonly-used standards of IEC 62391, Maxwell, and QC/T741-2014, which are significantly different in test procedures and calculation methods. The analysis of the test procedures and results demonstrated that the IEC 62391 standard has the disadvantages of a large testing current, long testing time, and a complex and inaccurate DCESR calculation, whereas the Maxwell standard has the disadvantages of a large testing current, a small capacitance, and large DCESR testing results, and furthermore the QC/T 741 standard has the disadvantages of a high resolution requirement for the equipment and small DCESR results. Therefore, an improved method was proposed to determine the capacitance and DCESR of EDLC cells by short-time constant voltage charging and discharging interruption methods, respectively, with the advantages of high accuracy, low equipment requirements, short testing time, and the easy calculation of DCESR over the original three standards.
关键词standard test method capacitance DCESR EDLC cells
DOI10.3390/s23104717
发表期刊SENSORS
卷号23期号:10页码:14
通讯作者Dong, Lichun(lcdong72@cqu.edu.cn)
收录类别SCI
WOS记录号WOS:000996693400001
语种英语