本发明提出了一种动力电池的散热结构,包括反应体、壳体和极片,反应体包括以卷绕方式或叠片方式进行包装的正极材料、负极材料和电解质,还包括散热层,反应体和壳体内壁的接触面为贴覆面,散热层紧密填充于贴覆面和壳体内壁之间,散热层为液态金属;当反应体因为发电反应而温度升高时,散热层随温度升高而熔化并能够在贴覆面和壳体内壁之间流动,且散热层在液态金属的表面张力作用下始终位于贴覆面和壳体内壁之间;利用液态金属的热传导性能,能够提高将反应体的反应发热传导至壳体进行扩散的效率,同时利用液态金属的受热熔化能够流动的特性,使液体金属填充于贴覆面和壳体内壁的凹凸不平内,避免空气气泡阻碍热传导的问题。

    The invention provides a heat dissipation structure of a power battery. The heat dissipation structure comprises a reaction body, a shell and a pole piece, wherein the reaction body comprises a positive electrode material, a negative electrode material and an electrolyte which are packaged in a winding mode or a laminating mode. The heat dissipation structure further comprises a heat dissipation layer, the contact surface of the reaction body and the inner wall of the shell is a pasting surface, and the space between the pasting surface and the inner wall of the shell is tightly filled with the heat dissipation layer. The heat dissipation layer is liquid metal. When the temperature of the reaction body rises due to the power generation reaction, the heat dissipation layer melts along withthe temperature rise and can flow between the pasting surface and the inner wall of the shell, and the heat dissipation layer is always located between the pasting surface and the inner wall of the shell under the action of the surface tension of the liquid metal; by means of the heat conduction performance of the liquid metal, the efficiency of conducting reaction heat of the reaction body to theshell for diffusion can be improved, meanwhile, by means of the characteristic that the liquid metal can flow after being heated and melted, the liquid metal is filled in the pasting surface and theuneven inner wall of the shell, and the problem that air bubbles hinder heat conduction is avoided.


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    Title :

    一种动力电池的散热结构及动力电池


    Publication date :

    2025-06-27


    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