This article presents a frequency-variable resonant self-heating technique for improving the heating speed of lithium-ion batteries at very low temperatures. In contrast to the conventional heating method with a fixed current and frequency, the proposed technique can increase the battery heating current by determining the minimum impedance of the lithium-ion batteries. Then, through a variable charging/discharging frequency operation, this technique can increase the heating speed without inducing a temperature plateau because of impedance reduction. A lithium-ion battery with improved self-heating performance at low temperatures was developed and used to verify the proposed self-heating technique. A simulation model and self-heating device (dc/dc converters) were also designed and tested at –30-°C ambient temperature. The proposed frequency-variable resonant self-heating technique achieved a heating speed four times faster (from 2784 s to 717 s) than the conventional self-heating technique. Thus, lithium-ion batteries can be used at cryogenic temperatures (–30 °C) by quickly raising the battery temperature with this technique.


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    Titel :

    Frequency-Variable Resonant Self-Heating Technique for Lithium-Ion Batteries at Low Temperature


    Beteiligte:
    Ha, Sang-Hyeon (Autor:in) / Lee, Jae-In (Autor:in) / Yoon, Hyunki (Autor:in) / Park, Tae-Ryong (Autor:in) / Baek, Jaeill (Autor:in) / Kim, Jae-Sang (Autor:in) / Moon, Gun-Woo (Autor:in)


    Erscheinungsdatum :

    01.08.2022


    Format / Umfang :

    6569547 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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