Design of active equalization BMS for echelon utilization of spent lithium - ion batteries
废旧锂离子电池梯次利用的主动均衡BMS设计

摘要

废旧锂离子电池的梯次利用是当前能源回收和储能领域的研究热点。本文针对锂离子电池在梯次利用过程中存在的电池单体电压不均衡问题，提出了一种基于主动均衡技术的电池管理系统（BMS）设计方案。通过对电池单体电压的实时监测与调节，利用均衡电路有效地消除了电池组内的不均衡状态，从而延长电池组的使用寿命，提高能量利用率。该方案在保证电池安全性和稳定性的前提下，能够最大程度地提升梯次利用电池的整体性能，具有重要的实际应用价值。实验结果表明，所设计的BMS能够显著提高电池组的效率和稳定性。

Abstract

The echelon utilization of spent lithium - ion batteries is a research hotspot in the field of energy recovery and energy storage. Aiming at the problem of unbalanced voltage of battery cells in the process of echelon utilization of lithium - ion batteries, this paper proposes a design scheme of battery management system (BMS) based on active equalization technology. Through real - time monitoring and regulation of the voltage of battery cells, the equalization circuit is used to effectively eliminate the unbalanced state in the battery pack, thereby prolonging the service life of the battery pack and improving the energy utilization rate. On the premise of ensuring the safety and stability of the battery, this scheme can maximize the overall performance of the echelon - used battery, which has important practical application value. The experimental results show that the designed BMS can significantly improve the efficiency and stability of the battery pack.