The invention provides a power battery pack thermal runaway protection method and system, the protection method is used for executing power battery pack thermal runaway protection in BMS dormancy, and the protection method comprises a thermal runaway preliminary determination step and a thermal runaway determination step, in the thermal runaway preliminary determination step, the BMS is periodically and automatically awakened, and in the thermal runaway determination step, the BMS is automatically awakened; the method comprises the following steps: awakening a power battery pack, acquiring current cell state data of the power battery pack after each awakening, judging whether the power battery pack has thermal runaway or not according to the acquired current cell state data, acquiring a current state signal of the power battery pack in the thermal runaway determination step, and determining thermal runaway according to the acquired current state signal. And judging whether the power battery pack is subjected to thermal runaway or not. According to the thermal runaway protection method for the power battery pack, the state of the power battery pack can be monitored in BMS dormancy, so that thermal runaway early warning is carried out, and the power battery pack and even a whole vehicle can be better protected.

    本发明提供了一种动力电池包热失控防护方法及防护系统,本发明的防护方法用于在BMS休眠中执行动力电池包热失控防护,且该防护方法包括热失控初步确定步骤和热失控确定步骤,热失控初步确定步骤中,周期性自动唤醒BMS,并于每次唤醒后采集动力电池包的当前电芯状态数据,且根据采集的当前电芯状态数据,判断所述动力电池包是否发生热失控,热失控确定步骤中采集所述动力电池包的当前状态信号,并根据采集的当前状态信号,判断所述动力电池包是否发生热失控。本发明所述的动力电池包热失控防护方法能够在BMS休眠中对动力电池包的状态进行监测,以此进行热失控预警,而能够对动力电池包乃至整车做到更好的防护。


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    Title :

    Power battery pack thermal runaway protection method and protection system


    Additional title:

    动力电池包热失控防护方法及防护系统


    Contributors:
    LI WEIKANG (author) / LIU CHONGWEI (author)

    Publication date :

    2022-03-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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