| Title |
Analysis of Available Capacity in Battery Packs According to Operating Criteria of a Passive Cell Equalizer |
| Authors |
배영민(Young-Min Bae) ; 이성준(Sung-Jun Lee) ; 이상력(Sang-ryuk Lee) ; 김종훈(Jonghoon) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.4.850 |
| Keywords |
Lithium titanate oxide batteries; Battery management system (BMS); Stage-of-charge (SOC); Passive cell equalizer |
| Abstract |
As the use of large-capacity battery packs increases, passive cell equalizers have become an essential function of battery management systems (BMS) to mitigate cell-to-cell imbalance. However, the operating criteria of passive cell equalizers have been determined empirically, and although comtrol methods based on state of charge (SOC) have recently been proposed. direct comparisons with conventional voltage-based operation remain limited. Moreover, few studies have examined the effect of these operating criteria on maximizing the available capacity of battery packs. This study develops a BMS integrating a passive cell equalizer and implements dedicated firmware to evaluate these strategies. Flowcharts for voltage-based and SOC-based balancing are designed and embedded in the actual BMS to compare and analyze the available capacity of the battery pack after imbalance mitigation. The comparative analysis presented in this study is expected to support the determination of optimal cell equalizer operating criteria and contribute to the design of battery packs that maximize their available capacity. |