The invention relates to a power battery thermal runaway active explosion-proof control method and system, a vehicle and a medium, and the method comprises the steps: obtaining the SOC state of a battery and the concentration of at least one preset combustible gas in a battery pack, and checking a concentration relation table of different gases in different SOC states according to the SOC state of the battery and the concentration of the preset combustible gas, obtaining a ratio estimation value of each gas in the battery pack in the current SOC state; calculating a lower limit estimation value of detonation limit in the battery pack according to each gas proportion estimation value and the SOC state of the battery; and comparing the deflagration limit lower limit estimation value in the current SOC state with the deflagration limit lower limit calibration value in the corresponding SOC state, judging the deflagration risk level in the battery pack, and controlling the opening degree of an anti-explosion ventilation valve of the battery pack according to the deflagration risk level. According to the invention, real-time estimation of the proportion of the combustible gas in the battery pack can be realized, and active control of the concentration of the combustible gas in the battery pack is realized through hierarchical control of the opening degree of the explosion-proof ventilation valve.

    本发明涉及动力电池热失控主动防爆控制方法、系统、车辆及介质,包括:获取电池SOC状态和电池包内至少一种预设可燃气体的浓度,根据电池SOC状态和预设可燃气体的浓度查不同SOC状态下不同气体的浓度关系表,得到当前SOC状态下电池包内各气体比例估算值;根据各气体比例估算值和电池SOC状态计算电池包内爆燃极限下限估算值;将当前SOC状态下的爆燃极限下限估算值和对应SOC状态的爆燃极限下限标定值进行比较,判断电池包内的爆燃风险等级,并根据爆燃风险等级控制电池包的防爆透气阀的开启大小。本发明能够实现电池包内可燃气体比例的实时估计,并通过分级控制防爆透气阀的开度,以实现电池包内可燃气体浓度的主动控制。


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    Title :

    Active anti-explosion control method and system for thermal runaway of power battery, vehicle and medium


    Additional title:

    动力电池热失控主动防爆控制方法、系统、车辆及介质


    Contributors:
    RAO JUN (author) / ZHANG XIAOTAO (author) / CHEN XIAODONG (author) / YU HUILI (author) / YAN XU (author)

    Publication date :

    2024-05-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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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