上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (08): 1304-1309.

• 交通运输 • 上一篇    下一篇

低速电动汽车混合能源存储系统效率分析  

吴志伟，张建龙，吴红杰，殷承良   

  1. （上海交通大学  汽车电子控制国家工程实验室，上海 200240）
  • 出版日期:2012-08-31 发布日期:2012-08-31

Efficiency Analysis of Hybrid Energy Storage System  in Light Electric Vehicles

 WU  Zhi-Wei, ZHANG  Jian-Long, WU  Hong-Jie, YIN  Cheng-Liang   

  1. (National Engineering Laboratory for Automotive Electronic Control Technology， Shanghai Jiaotong University， Shanghai 200240， China)
  • Online:2012-08-31 Published:2012-08-31

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%.   

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

Abstract: 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%.

Key words: ultra-capacitor, LiFePO4 battery, hybrid energy storage system (HESS), light electric vehicles (LEVs), bidirectional DC-DC

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