In this work, the impact of fast charging on the aging of two commercial available lithium-ion cell types has been investigated. The cells differ in their cathode material. Cell A uses a nickel manganese cobalt oxide cathode and cell B a lithium iron phosphate cathode. The test procedure consists of a power profile which represents a realistic driving cycle of a public bus in a heavy route service. The cells show a similar capacity fade over the test cycles, but the development of the internal resistance differs strongly. After the first cycles, the internal resistance of cell B stays approximately constant, whereas the value of cell A increases. The increasing resistance may cause disadvantages in the application, like the rising cooling demand. Therefore cell B seems to be advantageous for fast charging concepts. Still, this does not mean that all lithium iron phosphate (LFP) cells are generally suitable for fast charging. The aging is always cell dependent and can differ according to the manufacturer, the cell type, the cell geometry and several more reasons. This requires individual cell tests to determine the aging with the special focus on the application. The measurements have shown that a battery system, suitable for fast charging battery buses, can be built with commercial available high power lithium-ion cells. However, further aging tests are required to make a reliable statement about the overall lifetime of the system.


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    Titel :

    Fast charging of battery buses and its impact on the aging of various lithium-ion cell types


    Beteiligte:
    Matthias, Rogge (Autor:in) / Sauer, Dirk Uwe (Autor:in)


    Erscheinungsdatum :

    2013


    Format / Umfang :

    18 Seiten, 9 Bilder, 3 Tabellen, 9 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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