Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors
The demand for electric double-layer capacitors (EDLCs) has recently increased, especially for regenerative braking systems in electric or hybrid vehicles. However, using EDLCs under high temperature often enhances their degradation. Continuously monitoring EDLC degradation is important to prevent s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/2/435 |
| _version_ | 1797410621227008000 |
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| author | Tomoki Omori Masahiro Nakanishi Daisuke Tashima |
| author_facet | Tomoki Omori Masahiro Nakanishi Daisuke Tashima |
| author_sort | Tomoki Omori |
| collection | DOAJ |
| description | The demand for electric double-layer capacitors (EDLCs) has recently increased, especially for regenerative braking systems in electric or hybrid vehicles. However, using EDLCs under high temperature often enhances their degradation. Continuously monitoring EDLC degradation is important to prevent sudden malfunction and rapid drops in efficiency. Therefore, it is useful to diagnose the degradation at a lower frequency than that used in charge/discharge. Unused and degraded EDLCs were analyzed using the alternating current impedance method for measurements over a wide frequency range. Each result had a different spectrum up to 1 kHz. In addition, we show the basic inside condition of EDLCs with equivalent circuit analysis. This paper explores the possibility of degradation diagnosis at a high frequency and the basic physical mechanism. |
| first_indexed | 2024-03-09T04:32:50Z |
| format | Article |
| id | doaj.art-58eb7521f57847fc8007c210455c6d45 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:32:50Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-58eb7521f57847fc8007c210455c6d452023-12-03T13:32:30ZengMDPI AGMaterials1996-19442021-01-0114243510.3390/ma14020435Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer CapacitorsTomoki Omori0Masahiro Nakanishi1Daisuke Tashima2Department of Electrical Engineering, Graduate School of Engineering, Fukuoka Institute of Technology, Wajiro-higashi 3-30-1, Higashi-ku, Fukuoka 811-0295, JapanDepartment of Electrical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, Wajiro-higashi 3-30-1, Higashi-ku, Fukuoka 811-0295, JapanDepartment of Electrical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, Wajiro-higashi 3-30-1, Higashi-ku, Fukuoka 811-0295, JapanThe demand for electric double-layer capacitors (EDLCs) has recently increased, especially for regenerative braking systems in electric or hybrid vehicles. However, using EDLCs under high temperature often enhances their degradation. Continuously monitoring EDLC degradation is important to prevent sudden malfunction and rapid drops in efficiency. Therefore, it is useful to diagnose the degradation at a lower frequency than that used in charge/discharge. Unused and degraded EDLCs were analyzed using the alternating current impedance method for measurements over a wide frequency range. Each result had a different spectrum up to 1 kHz. In addition, we show the basic inside condition of EDLCs with equivalent circuit analysis. This paper explores the possibility of degradation diagnosis at a high frequency and the basic physical mechanism.https://www.mdpi.com/1996-1944/14/2/435supercapacitorelectric double-layer capacitoralternating current impedance methodequivalent circuit analysismodeling |
| spellingShingle | Tomoki Omori Masahiro Nakanishi Daisuke Tashima Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors Materials supercapacitor electric double-layer capacitor alternating current impedance method equivalent circuit analysis modeling |
| title | Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors |
| title_full | Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors |
| title_fullStr | Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors |
| title_full_unstemmed | Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors |
| title_short | Modeling of Equivalent Circuit Analysis of Degraded Electric Double-Layer Capacitors |
| title_sort | modeling of equivalent circuit analysis of degraded electric double layer capacitors |
| topic | supercapacitor electric double-layer capacitor alternating current impedance method equivalent circuit analysis modeling |
| url | https://www.mdpi.com/1996-1944/14/2/435 |
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