Research on Equalization Strategy of Lithium Battery Pack Based on Multi-Layer Circuit

Effective balanced management of battery packs can not only increase the available capacity a pack but reduce attenuation and loss caused by cell inconsistencies remove safety hazards abnormal use such as overcharge over-discharge. This research considers both equilibration period operating current. The State Charge (SOC), current, equalization current batteries are all limited. Based on existing multi-layer model, equalizer was tuned with restrictions. It equalize multiple simultaneously ensure normal operation batteries. A layered control strategy then found to solve optimal layer layer. proposed method reduces computation time guarantees that approach be employed in practice. Finally, through MATLAB simulation analysis, this technique limit (−3 A, 3 A), which improves balancing efficiency 23.55% compared adjacent cells.