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Enhanced Performance of Electric Double Layer Capacitor as Peak Power Buffer in the Hybrid Power Source Under Low Temperature

[+] Author Affiliations
Guoyu Zhang, Lin Yang, Xiaowei Zhao, Feng Tian, Jiaxi Qiang

Shanghai Jiaotong University, Shanghai, China

Paper No. IMECE2012-85807, pp. 423-427; 5 pages
doi:10.1115/IMECE2012-85807
From:
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 6: Energy, Parts A and B
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4522-6
  • Copyright © 2012 by ASME

abstract

The performance of the hybrid power source at low temperature is experimentally analyzed. The parallel connected electric double layer capacitor (EDLC) enhances the power of Li-ion battery as it acts as a buffer in charge and discharge processes, especially at low ambient temperature. The behaviors of current and voltage of both the battery and EDLC are studied by experiments and described by a mathematical model. The EDLC can share a great part of total current load at low temperature, which effectively release the battery stress in pulse charge/discharge processes. Moreover, adding an EDLC in parallel with the battery also exhibits a considerable increase in capacity as compared to the Li-ion battery standalone in pulsed and continuous discharge processes. The performance of the hybrid power source under practical drive cycle is also studied in this article.

Copyright © 2012 by ASME

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