Hybrid electric vehicles (HEV) need long-lived high-power batteries as energy storage devices. Batteries based on lithium-ion technology can meet the high-power goals but have been unable to meet HEV calendar-life requirements. As part of the US Department of Energy's Advanced Technology Development (ATD) Program, diagnostic studies are being conducted on 18650-type lithium-ion cells that were subjected to accelerated aging tests at temperatures ranging from 40 to 70 degrees C. This article summarizes data obtained by gas chromatography, liquid chromatography, electron microscopy, X-ray spectroscopy and electrochemical techniques, and identifies cell components that are responsible for the observed impedance rise and power fade.


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    Title :

    Diagnosis of power fade mechanisms in high-power lithium-ion cells


    Contributors:
    Abraham, D.P. (author) / Liu, J. (author) / Chen, C.H. (author) / Hyung, Y.E. (author) / Stoll, M. (author) / Elsen, N. (author) / MacLaren, S. (author) / Twesten, R. (author) / Haasch, R. (author) / Sammann, E. (author)


    Publication date :

    2003


    Size :

    6 Seiten, 8 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English