Active Charge Equalizer of Li-Ion Battery Cells Using Double Energy Carriers
SCIE
SCOPUS
- Title
- Active Charge Equalizer of Li-Ion Battery Cells Using Double Energy Carriers
- Authors
- Lee, S.-W.; Choi, Y.-G.; Kang, B.
- Date Issued
- 2019-06
- Publisher
- MDPI
- Abstract
- In this work, a new active balancing circuit is proposed. This circuit consists of a cell-access network and an energy-transfer network. The cell-access network requires 2n + 6 switches, where n is the number of cells, and creates an energy-transfer path between unbalanced cells and the energy-transfer network. The energy-transfer network has double energy carriers and simultaneously implements cell-to-pack and pack-to-cell balancing operations without overlapping. As a result, a high power rate and fast balancing operation can be achieved by using two energy carriers in a single balancing circuit. The prototype of a proposed balancing circuit was built for six cells and then tested under various conditions; all cells in the state of charge (SOC) region of 70% to 80% were equalized after 93 min, and one charging/discharging period in the SOC region of 10% to 90% was increased by 8.58% compared to the non-balancing operation. These results show that the proposed circuit is a good way to balance charges among batteries in a battery pack.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/101136
- DOI
- 10.3390/en12122290
- ISSN
- 1996-1073
- Article Type
- Article
- Citation
- ENERGIES, vol. 12, no. 12, 2019-06
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.