锂电池组主从通信模式下均衡充电系统的设计  

The Design of Equalization Charging System with Lithium Battery Group Master-Slave Communication Mode

作　　者：陈蕾[1] 王顺利[1] 张丽[1] 王露[1] CHEN Lei;WANG Shun-li;ZHANG Li;WANG Lu(School of Information Engineering, Southwest University of Science and Technolog)

机构地区：[1]西南科技大学信息工程学院

出　　处：《化工自动化及仪表》2018年第4期320-323,336,共5页Control and Instruments in Chemical Industry

基　　金：四川省科技厅重点研发项目(2017FZ0013);四川省教育厅科研项目(17ZB0453);绵阳市科技局科技攻关项目(15G-03-3)

摘　　要：结合锂电池的工作特性分析其串联使用不一致性的原因和危害,说明了锂电池组均衡系统存在的必要性。分析现有各类均衡技术的利弊,选择研究主从通信模式下的被动均衡技术。设计了基于LTC6804检测电压、LTC3390为LTC6804降压至5V的均衡系统方案,通过SPI通信模式,实现LTC6804与单片机之间的数据传输。优化硬件方案并研究了软件防干扰方法,优化均衡控制策略。最后对锂离子电池组均衡系统进行实验,结果表明:所设计电池管理系统运行安全,均衡器不平衡度(标准差)从0.109降至0.003,均衡效率和均衡度良好。Through having the operating characteristics of lithium batteries considered and both causes and effects of their inconsistency in operation analyzed, the necessity of lithium battery balance system＇ s existence was explained; after analyzing the advantages and disadvantages of various existing equalization techniques, the passive equalization technique with master-slave communication mode was studied and selected; and based on LTC6804 test voltage and LTC3390 reducing LTC6804＇ s voltage to 5V, a balanced system scheme was de- signed and through the SPI communication mode, the data transmission between LTC6804 and single chip which based on was realized. The hardware program was optimized and the software anti-jamming method was studied to optimize the balanced control strategy. The experiments on the lithium-ion battery cell equalization system show that, the battery management system designed can run safely and the equalizer＇ s unbalance de- gree has been reduced from 0. 109 to 0. 003 along with better balance efficiency and balance degree.

关 键 词：锂电池组 均衡充电 被动均衡 主从通信 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]