储能科学与技术2024，Vol.13Issue(5)：1635-1642,8.DOI:10.19799/j.cnki.2095-4239.2023.0820
基于功率变换器的梯次利用电池系统均衡控制策略
Balancing control strategy for cascaded utilization of battery systems using power converters
摘要
Abstract
The cascaded utilization of batteries is an economic and efficient metho d for handling retired lithium batteries.However,during the process of cascaded utilization,some issues may arise due to the imbalance caused by the simultaneous use of batteries of different ages and conditions,affecting the safe and stable operation of the battery system.This study analyzes the issues of current loops and low battery system capacity utilization caused by the imbalance arising when the batteries prepared for cascaded utilization are directly paralleled.To address these issues,this study proposes a battery system in parallel and a balancing control algorithm based on power converters.In this approach,each battery module is connected to a power converter to form a power module.By adjusting the output of the voltage loop,current loop,and state-of-charge loop,the charging and discharging currents of each battery module are controlled independently,achieving balanced and optimized control for cascaded utilization of batteries.This study provides a detailed analysis of the control strategy and discusses experimental results to evaluate and validate the effectiveness of the proposed balancing method.The experimental test results demonstrate that the proposed balancing control strategy can effectively and stably control the currents of different batteries,ensure balanced state-of-charge parameters between batteries,and improve the overall efficiency of the battery system.Thus,this study promotes the effective cascaded utilization of retired batteries and provides new ideas for implementing balancing control in battery systems.By achieving balanced utilization of batteries,their lifespan can be extended,the risk of system failure can be reduced,and the reliability and stability of the battery system can be improved.关键词
电池储能系统/荷电参数/电池均衡/功率变换器/电池梯次利用Key words
battery energy storage system/state-of-charge(SOC)/charging balancing/power converter/battery cascaded utilization分类
信息技术与安全科学引用本文复制引用
张大兴,黄泽荣,王祥东,王延凯,蔡冰子,袁昊宇,田明明,袁英平,曹原..基于功率变换器的梯次利用电池系统均衡控制策略[J].储能科学与技术,2024,13(5):1635-1642,8.基金项目
广东电网有限责任公司惠州供电局科技项目(0313002023030103B200031),国家自然科学基金项目(62103443),湖南省自然科学基金项目(2022JJ40630). （0313002023030103B200031）
