摘要
应用于轨道交通、航空航天等领域内的电池组电压等级较高,针对电池组内电池模组间的均衡问题,此处提出了基于双向反激变换器的电池组主动均衡系统,其具有电气隔离、结构简单、成本较低等特点。同时,均衡系统由多个均衡单元组成,可以实现各均衡单元的独立控制,增加了均衡控制策略的灵活性。对组成均衡系统的各个部分及均衡控制策略进行了分析,针对变压器中漏感能量与部分激磁能量的吸收,介绍了RCD吸收电路的工作过程,并从功率角度出发,分析了吸收电路参数对开关管应力及损耗功率间的关系。通过仿真和实验结果验证了所研究的均衡系统及其控制策略的可行性,实现了各均衡单元的电流控制及各电池模组间的均衡控制。
The battery pack voltage level used in rail transportation,aerospace and other fields is relatively high.In view of the balancing problem between battery modules in the battery pack,a battery pack active balancing system based on a bidirectional flyback converter is proposed,which has the characters such as electrical isolation,simple structure,low cost and so on.At the same time,the balancing system consists of multiple balancing units,which can achieve independent control of each balancing unit,increasing the flexibility of the balancing control strategy.The various components of the balancing system and equalization control strategies are analyzed.For the absorption of leakage inductance energy and partial excitation energy in the transformer,the working process of the RCD absorption circuit is introduced.From the perspective of power,how the parameters of the absorption circuit affect the relationship between switch stress and power loss is analyzed.Through simulation and experimental results,the feasibility of the balancing system and its control strategy studied are verified,and the current control of each balancing unit and the balancing control between each battery module are realized.
作者
张亚楠
梁志华
罗欣儿
梁晖
ZHANG Ya-nan;LIANG Zhi-hua;LUO Xin-er;LIANG Hui(National Active Distribution Network Technology Research Center,Beijing Jiaotong University,Beijing 100044,China;不详)
出处
《电力电子技术》
CSCD
北大核心
2021年第7期1-6,45,共7页
Power Electronics
基金
中国南方电网有限责任公司科技项目(090000KK52180092)。
关键词
双向反激变换器
电池组
主动均衡
bidirectional flyback converter
battery pack
active balancing