摘要
串联电池组需要均压措施保证其容量、寿命和安全。该文提出一种基于多端口变压器的串联锂电池均压电路,通过主动和被动两种均压路径实现高可控与高效率的整体均压。与同类均压电路相比,无需附加额外电路,且变压器绕组和开关管数量减少一半。通过电路建模分析确定设计变压器电压比等关键参数的约束条件,并在传统平均电压控制策略的基础上提出预测电压和最低电压两种控制策略。最后,针对24串联锂电池组设计基于GaN开关器件和平面多端口变压器的均压样机,实验结果表明,所提电路和控制方法具有良好的均压速度和效率。
A series lithium battery pack needs voltage equalization to ensure its life and safety.In this paper,a series voltage equalizing circuit of lithium battery based on multi-port transformer is proposed,which can realize the controllable voltage equalization through active and passive paths.And it can directly control the charging or discharging of specific batteries.Compared with the conventional congeneric methods,it requires no additional circuits.Also,the number of transformer windings and MOSFET is reduced by half.By modeling and analyzing the circuit,the constraint conditions of key parameters such as transformer turn ratio are determined.In addition,predicted voltage and lowest voltage control strategies are proposed based on the traditional average voltage control strategy.Finally,a voltage equalization prototype based on GaN MOSFET and planar multi-port transformer is designed for 24 series battery packs.It is shown that the proposed circuit and control strategies have good voltage equalizing speed and efficiency.
作者
聂江霖
杨江朋
蔡春健
孙鑫宇
舒泽亮
Nie Jianglin;Yang Jiangpeng;Cai Chunjian;Sun Xinyu;Shu Zeliang(School of Electrical Engineering Southwest Jiaotong University,Chengdu 611756 China;The Ministry of Education Key Laboratory of Magnetic Suspension Technology and Maglev VehicleSouthwest Jiaotong University,Chengdu 610031 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第20期4274-4284,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(52077183)
国家轨道交通电气化与自动化工程技术研究中心开放课题(第三期)(NEEC-2019-A04)资助项目。
关键词
串联锂电池均压电路
多端口变压器
预测电压控制策略
最低电压控制策略
Lithium battery series voltage equalizer
multi-port transformer
predicted voltage control strategy
lowest voltage control strategy
