The invention discloses a low-temperature heating method and a system for a power battery of an electric vehicle, the vehicle and a storage medium. The method comprises the steps that when the first lowest temperature of the real-time temperature of each single battery in a power battery pack is smaller than a first temperature threshold value, switching the power battery pack to a self-heating mode; generating a first heating signal according to an initial heating parameter which corresponds to the first lowest temperature and contains an initial charging and discharging amplitude, obtaining a second lowest temperature and a charging and discharging peak voltage after the power battery pack is self-heated through the first heating signal, and obtaining a charging and discharging cut-off voltage associated with the second lowest temperature; adjusting the initial charging and discharging amplitude according to the charging and discharging cut-off voltage and the charging and discharging peak voltage; and adjusting the first heating signal into a second heating signal according to the adjusted initial charging and discharging amplitude, so that the power battery pack performs self-heating through the second heating signal. The heating rate of the power battery pack is increased while uniform temperature rise of the power battery pack is ensured.

    本发明公开了一种电动汽车动力电池低温加热方法、系统、汽车及存储介质。该方法在动力电池组中各单节电池的实时温度的第一最低温度小于第一温度阈值时,将动力电池组切换至自加热模式;根据与第一最低温度对应的包含初始充放电幅值的初始加热参数生成第一加热信号,获取动力电池组通过第一加热信号进行自加热之后的第二最低温度以及充放电峰值电压,获取与第二最低温度关联的充放电截止电压;根据充放电截止电压和充放电峰值电压调整初始充放电幅值;根据调整后的初始充放电幅值将第一加热信号调整为第二加热信号,以令动力电池组通过第二加热信号进行自加热。本发明在保证动力电池组均匀升温的同时,提高了动力电池组的加热速率。


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    Titel :

    Low-temperature heating method and system for power battery of electric vehicle, vehicle and storage medium


    Weitere Titelangaben:

    电动汽车动力电池低温加热方法、系统、汽车及存储介质


    Beteiligte:
    LING HEPING (Autor:in) / XIONG YONG (Autor:in) / YAN LEI (Autor:in) / SONG GAN (Autor:in) / PING LANG (Autor:in)

    Erscheinungsdatum :

    2021-04-27


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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