The invention discloses a cylindrical battery structure and method for preventing thermal runaway of a battery, the cylindrical battery structure comprises a shell, a roll core is arranged in the shell, a hollow sealing cylinder is arranged in the center of the roll core, the hollow sealing cylinder is divided into an inner layer and an outer layer to form two independent cavities, a phase-change material is packaged in the outer cavity, and the phase-change material is arranged in the outer cavity. Battery flame-retardant liquid is packaged in the inner cavity; the problem of large temperature difference between the inside and the outside of a large cylindrical battery in the prior art can be solved, and meanwhile, before the battery is subjected to thermal runaway, the flame-retardant substance is released into the battery core, so that the chain reaction of thermal runaway heat production of the battery is prevented, and the thermal runaway is blocked.

    本发明公开了一种阻止电池热失控的圆柱形电池结构及方法,所述圆柱形电池结构,包括壳体,所述壳体内设置卷芯,在卷芯的中央位置设置空心密封圆柱体,空心密封圆柱体分内外两层,形成两个独立的腔体,外部腔体封装有相变材料,内部腔体封装有电池阻燃液;本发明能够解决现有技术中大型圆柱型电池内外温差大的问题,同时,在电池发生热失控前夕,通过向电芯内释放阻燃物质,从而阻止电池热失控产热的链式反应,阻断热失控的发生。


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    Title :

    Cylindrical battery structure and method for preventing thermal runaway of battery


    Additional title:

    一种阻止电池热失控的圆柱形电池结构及方法


    Contributors:
    FANG LEI (author) / WANG XIAOYA (author) / KANG SUNG-WOO (author) / LIU DEFANG (author)

    Publication date :

    2023-08-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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