The invention discloses a thermal runaway monitoring method and system for a power battery and an electric automobile, and the method comprises the steps that when the power automobile is in a high-voltage power-off state, a battery management system takes electricity from a power battery pack through a DC-DC step-down converter so as to carry out thermal runaway monitoring on the power battery pack in the power-off state; wherein the high-voltage end of the direct current-direct current step-down converter is connected to the total positive and the total negative of the power battery pack, and the low-voltage end of the direct current-direct current step-down converter is connected to the battery management system; when the power automobile is in a high-voltage power-on state, the battery management system takes electricity from the power battery pack through a high-voltage distributor so as to carry out thermal runaway monitoring on the power battery pack in the power-on state; a switch control assembly in the DC-DC step-down converter is controlled to automatically cut off a power supply line connected with the battery management system; wherein the high-voltage distributor is connected to the total positive electrode and the total negative electrode of the power battery pack and is controlled by the battery management system.

    本发明公开了一种动力电池的热失控监测方法、系统及电动汽车,所述方法包括:在动力汽车处于高压下电状态时,电池管理系统通过直流‑直流降压转换器从动力电池组取电,以对所述动力电池组进行下电状态下的热失控监测;其中,所述直流‑直流降压转换器的高压端接入所述动力电池组的总正和总负,所述直流‑直流降压转换器的低压端接入所述电池管理系统;在所述动力汽车处于高压上电状态时,所述电池管理系统通过高压配电器从所述动力电池组取电,以对所述动力电池组进行上电状态下的热失控监测,并控制所述直流‑直流降压转换器内部的开关控制组件自动切断与所述电池管理系统连接的供电线路;其中,所述高压配电器接入所述动力电池组的总正和总负,并受控于所述电池管理系统。


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    Title :

    Thermal runaway monitoring method and system for power battery and electric vehicle


    Additional title:

    一种动力电池的热失控监测方法、系统及电动汽车


    Contributors:
    DENG JIAHUI (author) / LIU KAI (author) / ZOU XINGHUA (author) / CHEN CHEN (author) / LIU ZHENYONG (author)

    Publication date :

    2025-03-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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