基于PI控制的分段恒流锂电池充电器设计  

Design of Segmented Constant Current Lithium Battery Charger Based on PI Control

作　　者：徐苏东 袁哲 阚加荣[1] 卞佳龙 周斌 李炎 

机构地区：[1]盐城工学院电气工程学院,江苏 盐城 [2]和远智能科技股份有限公司,山东 济南

出　　处：《建模与仿真》2023年第5期4824-4832,共9页Modeling and Simulation

摘　　要：为满足锂电池高效率的充电需求,设计了基于PI控制的分段恒流锂电池充电器。采用同步Buck电路作为主电路,4节锂离子电池串联成锂电池组作为充电目标,采用PI算法对锂电池充电器的输出电流、电压进行双闭环控制,通过可变充电电流实现锂电池组的快速充电。通过MATLAB/Simulink软件建立分段恒流锂电池充电系统的仿真模型,仿真结果表明,所设计的分段恒流锂电池充电器相比传统的恒流–恒压充电模式充电速率提高了2.86%,充电电量提升了4.26%,验证了该分段恒流锂电池充电器的可行性和高效性。In order to meet the demand of high-efficiency charging of lithium battery, a segmented constant current lithium battery charger based on PI control was designed. The synchronous Buck circuit is used as the main circuit, and four lithium-ion batteries are connected in series into a lithium bat-tery pack as the charging target. PI algorithm is used to control the output current and voltage of the lithium battery charger in a double closed-loop way, and the lithium battery pack can be quick-ly charged by variable charging current. The simulation model of the segment-constant-current lithium battery charging system was established by MATLAB/Simulink software. The simulation results showed that the designed segment-constant-current lithium battery charger increased the charging rate by 2.86% and the charging capacity by 4.26% compared with the traditional con-stant-current and constant-voltage charging mode. The feasibility and high efficiency of the seg-mented constant current lithium battery charger are verified.

关 键 词：锂电池充电器 分段恒流 同步Buck PI算法 双闭环控制 

分 类 号：TM9[电气工程—电力电子与电力传动]