低速电动汽车混合能源存储系统效率分析  

Efficiency Analysis of Hybrid Energy Storage System in Light Electric Vehicles

作　　者：吴志伟[1] 张建龙[1] 吴红杰[1] 殷承良[1] 

机构地区：[1]上海交通大学汽车电子控制国家工程实验室,上海200240

出　　处：《上海交通大学学报》2012年第8期1304-1309,共6页Journal of Shanghai Jiaotong University

摘　　要：利用超级电容的高功率密度特性和磷酸铁锂电池的高能量密度特性,设计了低速电动车主动并联混合储能系统方案.采用实验方法分析磷酸铁锂电池的效率,并通过理论公式分析了双向直流功率变换器的效率.探讨了将超级电容和磷酸铁锂电池结合使用,结果发现,采用双向直流变换器的混合能量存储系统能提高效率.通过实验验证,双向直流变换器的实际效率为90.5%,接近理论公式计算得到的效率91.6%.The design of active parallel hybrid energy storage system （HESS） for light electric vehicles （LEVs） was presented by the use of high power density ultra-capacitor and high energy density LiFePO4 battery. The battery efficiency was analyzed based on the experiment, and the theoretical efficiency of the bidirectional DC-DC power converter was derived. The combination of ultra-capacitor and LiFePO4 battery was discussed. The result demonstrates that the HESS with the bidirectional DC-DC power converter can improve the efficiency. The experimental result shows that the average efficiency of DC-DC is 90.5% in the HESS bench test, which is close to the theoretical efficiency 91.6%.

关 键 词：超级电容 磷酸铁锂电池 混合储能系统 低速电动汽车 双向直流功率变换器 

分 类 号：U469.72[机械工程—车辆工程]