The invention discloses a lower box body of a power battery. The lower box body comprises a power battery module assembly, a frame beam assembly and a steel lower bottom plate, wherein the main body of the frame beam assembly is an extruded aluminum profile; the frame beam assembly comprises a front edge beam, a rear edge beam, left and right edge beams, corner edge beams, cross beams and longitudinal beams; u-shaped openings are formed in the lap joint positions of the cross beams on the front side and the rear side and the longitudinal beams, and steps are arranged on the lap joint positionsof the longitudinal beams and the cross beams on the front side and the rear side; an n-shaped opening is formed in the position, in lap joint with the longitudinal beam, of the middle cross beam, and a u-shaped opening is formed in the position, in lap joint with the middle cross beam, of the longitudinal beam; rivet nuts are evenly distributed on the upper side and the lower side of the edge beam along the line, sealing foam is attached to the upper box body on the upper side of the frame beam assembly, sealing foam is attached to the lower bottom plate on the lower side of the frame beam assembly, and the frame beam assembly is fixed to the upper box body through upper box body fastening bolts and the rivet nuts and fixed to the lower bottom plate through lower bottom plate fastening bolts and the rivet nuts. The composite material is light in weight, low in cost and high in impact resistance and extrusion resistance.

    本发明公开了一种动力电池下箱体,包括动力电池模组总成、主体为挤压铝型材的框架梁组件和钢制的下底板;框架梁组件包括前边梁、后边梁、左右边梁、拐角边梁、横梁和纵梁;前后侧的横梁上与纵梁搭接的位置处设有u形开口,纵梁上与前后侧的横梁搭接的位置处设有台阶;中间的横梁上与纵梁搭接的位置处设有n形开口,纵梁上与中间的横梁搭接的位置处设有u形开口;边梁沿线上下侧均分布有拉铆螺母,框架梁组件上侧与上箱体贴合有密封泡棉、下侧与下底板贴合有密封泡棉,框架梁组件通过上箱体紧固螺栓和拉铆螺母与上箱体固定、通过下底板紧固螺栓和拉铆螺母与下底板固定。本发明轻量化,成本低,抗冲击和挤压能力强。


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    Title :

    Lower box body of power battery


    Additional title:

    动力电池下箱体


    Contributors:
    REN QIANG (author) / LIU KUN (author) / XING JUNYA (author) / HUAI HUI (author) / JIANG XIN (author)

    Publication date :

    2020-12-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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