一种用于模块化CPC均衡充电的最优化策略  

Optimization Strategy for Modular CPC Balanced Charging

作　　者：张嘉蕾[1] 王超宇 樊郭宇 李悦 吕高[1] ZHANG Jialei;WANG Chaoyu;Student Member;CPSS;FAN Guoyu;LI Yue;LÜGao(School of Electric Power,Civil Engineering and Architecture,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学电力与建筑学院,太原030006

出　　处：《电源学报》2024年第5期242-250,共9页Journal of Power Supply

摘　　要：随着锂电池在工业及生活中的广泛应用,锂电池组均衡充电策略的高效性及快速性也变得愈发重要,因此构建单体电池与电池模块间CPC(cell-to-pack-to-cell)的均衡充电系统,以解决锂电池组快速均衡充电问题。首先,对均衡系统进行模块化处理,建立模块内和模块间的均衡电路;然后,提出1种用于均衡充电的最优化策略,对所提策略模型进行分层求解,顶层通过二分法来计算充电时间,底层通过梯度下降法来优化充电电流;最后,通过与非模块化均衡充电策略下的充电时间、均衡时间、单体电池端电压及均衡器承担电压进行仿真对比,验证了所提策略的可行性和有效性。Along with the widespread applications of lithium batteries in industry and daily life,the efficiency and speed under balanced charging strategies for lithium battery packs have become increasingly important.A modular cellto-pack-to-cell(CPC)balanced charging system is constructed to solve the problem of fast equalization charging for lithium battery packs.First,the equalization system is modularized,and the equalization circuits within and between modules are established.Then,an optimization strategy for balanced charging is proposed,under which the proposed model is solved hierarchically,i.e.,the charging time is calculated using the binary method in the top layer,and the charging current is optimized using the gradient descent method in the bottom layer.Finally,through a comparison with the charging time,equalization time,cell terminal voltage and equalizer voltage under the non-modular balanced charging strategy,the feasibility and effectiveness of the proposed strategy are verified.

关 键 词：锂电池组 均衡控制 梯度下降法 快速充电策略 

分 类 号：TM34[电气工程—电机]