Commercial supercapacitors, also known as ultracapacitors or electrochemical capacitors, from Saft, Maxwell, Panasonic, CCR, Ness EPCOS, and Power Systems were tested under constant current and constant power discharges to assess their applicability for power-assist applications in hybrid electric vehicles (HEVs). Commercial lithium-ion batteries from Saft and Shin-Kobe were also tested under similar conditions. Internal resistances were measured by electrochemical impedance spectroscopy (EIS), as well as by the "iR drop" method. Self discharge measurements were also recorded. Compared with earlier generations of supercapacitors, the cells showed improved current and power capability. However, their energy densities are still too low to meet goals set by Partnership for a New Generation of Vehicles (PNGV) for HEV propulsion. Cells that use acetonitrile as the electrolyte solvent yield better performance, although safety issues need to be addressed. New high-power lithium-ion batteries show high energy densities, with high power capabilities.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Comparison of commercial supercapacitors and high-power lithium-ion batteries for power-assist applications in hybrid electric vehicles. I. Initial characterization


    Contributors:
    Chu, A. (author) / Braatz, P. (author)

    Published in:

    Journal of Power Sources ; 112 , 1 ; 236-246


    Publication date :

    2002


    Size :

    11 Seiten, 13 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






    High Power Lithium-Ion for Hybrid Electric Vehicles

    Chagnon, Guy | SAE Technical Papers | 1998


    High Power Lithium-Ion for Hybrid Electric Vehicles

    Chagnon, G. / Society of Automotive Engineers | British Library Conference Proceedings | 1998


    Batteries for hybrid vehicles or other high-power applications

    Miller,J.F. / Lee,J. / Christianson,C.C. et al. | Automotive engineering | 1987