电动汽车锂电池组高效主动均衡的研究与测试

发布时间：2018-06-19 04:11

本文选题：电动汽车 + 主动均衡　；参考：《汽车工程》2017年08期

【摘要】：电动汽车车载动力锂电池组在动态循环工况下的不一致性问题会严重降低电池组的整体性能。为此设计了一种基于宽压双向DC/DC的锂电池组主动均衡系统,实现任意单节或相邻多节电池间的高效能量转移。系统包括开关阵列选通单元、双向DC/DC单元和超级电容储能单元等。以各单节电池实时电压为均衡变量,开展均衡策略研究,并搭建了电池组主动均衡系统测试台架,对电池组在静置和恒流充电两种状态下进行均衡测试。结果表明:所提出的主动均衡方案可快速改善电池间的电压不一致性,均衡过程中能量转移效率可达83%以上。
[Abstract]:The inconsistency of the battery pack under the dynamic cycle condition will seriously reduce the overall performance of the battery pack. In this paper, an active equalization system for lithium battery pack based on wide voltage bidirectional DC / DC is designed, which can transfer energy efficiently between any single or adjacent cells. The system includes switch array strobe unit, bidirectional DC / DC unit and super capacitor energy storage unit. Taking the real-time voltage of each single cell as the equalization variable, the equalization strategy was studied, and the test bench of the battery pack active equalization system was set up, and the equalization test was carried out under the static and constant current charging conditions. The results show that the proposed active equalization scheme can quickly improve the voltage inconsistency between the cells, and the energy transfer efficiency can reach more than 83% during the equalization process.
【作者单位】：武汉理工大学自动化学院;东风汽车公司技术中心;
【基金】：国家自然科学基金(51477125) 国家重点基础研究发展计划项目(2013CB632505) 湖北省科技支撑计划项目(2014BEC074) 武汉市青年科技晨光计划项目(2016070204010155) 中央高校科研业务费专项资金(2017II40GX)资助
【分类号】：TM912;U469.72

【相似文献】