A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries
In this paper, a high-efficiency and low-cost active cell-to-cell balancing circuit for the reuse of electric vehicle (EV) batteries is proposed. In the proposed method, a battery string is divided into two legs to transfer the charge from each cell in one leg to that in the other and a bidirectiona...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
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| Series: | Batteries |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2313-0105/10/2/61 |
| _version_ | 1797298901152169984 |
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| author | Minh-Chau Dinh Thi-Tinh Le Minwon Park |
| author_facet | Minh-Chau Dinh Thi-Tinh Le Minwon Park |
| author_sort | Minh-Chau Dinh |
| collection | DOAJ |
| description | In this paper, a high-efficiency and low-cost active cell-to-cell balancing circuit for the reuse of electric vehicle (EV) batteries is proposed. In the proposed method, a battery string is divided into two legs to transfer the charge from each cell in one leg to that in the other and a bidirectional CLLC resonant converter is used to transfer energy between the selected cells. Thanks to the proposed structure, the number of bidirectional switches and gate drivers can be reduced by half compared to the conventional direct cell-to-cell topologies, thereby achieving lower cost for the system. The CLLC converter is used to transfer the charge, and it is designed to work at resonant frequencies to achieve zero-voltage zero-current switching (ZVZCS) for all the switches and diodes. Consequently, the system’s efficiency can be enhanced, and hence, the fuel economy of the system can also be improved significantly. To verify the performance of the proposed active cell-balancing system, a prototype is implemented for balancing the three EV battery modules that contain twelve lithium-ion batteries from xEV. The maximum efficiency achieved for the charge transfer is 89.4%, and the balancing efficiency is 96.3%. |
| first_indexed | 2024-03-07T22:42:48Z |
| format | Article |
| id | doaj.art-9553b519d17b48b0a2d5c867cf3be07d |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-07T22:42:48Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-9553b519d17b48b0a2d5c867cf3be07d2024-02-23T15:07:35ZengMDPI AGBatteries2313-01052024-02-011026110.3390/batteries10020061A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV BatteriesMinh-Chau Dinh0Thi-Tinh Le1Minwon Park2Institute of Mechatronics, Changwon National University, Changwon 51140, Republic of KoreaDepartment of Electrical Engineering, Changwon National University, Changwon 51140, Republic of KoreaDepartment of Electrical Engineering, Changwon National University, Changwon 51140, Republic of KoreaIn this paper, a high-efficiency and low-cost active cell-to-cell balancing circuit for the reuse of electric vehicle (EV) batteries is proposed. In the proposed method, a battery string is divided into two legs to transfer the charge from each cell in one leg to that in the other and a bidirectional CLLC resonant converter is used to transfer energy between the selected cells. Thanks to the proposed structure, the number of bidirectional switches and gate drivers can be reduced by half compared to the conventional direct cell-to-cell topologies, thereby achieving lower cost for the system. The CLLC converter is used to transfer the charge, and it is designed to work at resonant frequencies to achieve zero-voltage zero-current switching (ZVZCS) for all the switches and diodes. Consequently, the system’s efficiency can be enhanced, and hence, the fuel economy of the system can also be improved significantly. To verify the performance of the proposed active cell-balancing system, a prototype is implemented for balancing the three EV battery modules that contain twelve lithium-ion batteries from xEV. The maximum efficiency achieved for the charge transfer is 89.4%, and the balancing efficiency is 96.3%.https://www.mdpi.com/2313-0105/10/2/61cell balancingreuse of EV batteriesbidirectional CLLC resonant converter |
| spellingShingle | Minh-Chau Dinh Thi-Tinh Le Minwon Park A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries Batteries cell balancing reuse of EV batteries bidirectional CLLC resonant converter |
| title | A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries |
| title_full | A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries |
| title_fullStr | A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries |
| title_full_unstemmed | A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries |
| title_short | A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries |
| title_sort | low cost and high efficiency active cell balancing circuit for the reuse of ev batteries |
| topic | cell balancing reuse of EV batteries bidirectional CLLC resonant converter |
| url | https://www.mdpi.com/2313-0105/10/2/61 |
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