基于SOC的储能锂电池分层主动均衡研究  

Research on Hierarchical Active Equalization of Lithium Battery for Energy Storage Based on SOC

作　　者：邓端庆 罗文广[1] DENG Duanqing;LUO Wenguang(School of Automation,Guangxi University of Science and Technology,Liuzhou 545616,China)

机构地区：[1]广西科技大学自动化学院,广西柳州545616

出　　处：《自动化仪表》2025年第3期13-18,共6页Process Automation Instrumentation

基　　金：国家自然科学基金资助项目(61563006)。

摘　　要：储能电池系统由多个锂电池模组串联构成,模组间的一致性难以保障,容易出现电量不均衡现象,从而影响电池功率和能量的性能发挥。为了解决上述问题,以荷电状态(SOC)为均衡变量,设计一种分层控制的主动均衡拓扑。创新性地提出了组内使用双向降压-升压变换器、组间使用双向反激变换器的拓扑,使得组内和组间同时均衡。通过模糊控制动态调节均衡电流的大小,实现电池能量的转移,并提高均衡效率。使用Matlab搭建仿真模型,对六个单体电池进行静置和充放电均衡试验。试验结果表明:所提拓扑与传统单层降压-升压变换器拓扑相比至少减少了27.2%的均衡时间,从而验证了该拓扑的可行性和先进性。该研究能保障储能电池的安全性,对电池均衡控制领域有较高的参考价值。The energy storage battery system consists of multiple lithium battery modules connected in series,and the consistency among modules is difficult to guarantee,which is prone to power imbalance phenomenon and affects battery power and energy performance.To solve the above problems,a hierarchically controlled active equalization topology is designed using the state of charge(SOC)as the equalization variable.The topology of using a bidirectional Buck-boost converter within the group and a bidirectional flyback converter between the groups is innovatively proposed to make the equalization within and between the groups simultaneously.The size of the equalization current is dynamically adjusted through fuzzy control to realize the transfer of battery energy and improve the equalization efficiency.Matlab is used to build a simulation model,and the static and charge/discharge equalization tests are carried out on six single cell battery.The test results show that the proposed topology reduces the equalization time by at least 27.2%compared with the traditional single-layer Buck-boost converter topology,which verifies the feasibility and advancement of the topology.This research can guarantee the safety of the energy storage battery and has high reference value in the field of battery equalization control.

关 键 词：储能锂电池 荷电状态 主动均衡 分层控制 降压-升压 反激变换器 模糊控制 

分 类 号：TH-39[机械工程]