Lower support assembly of battery pack

The utility model discloses a battery pack lower bracket assembly. The device comprises a lower supporting plate, side supporting baffles, a middle supporting base and a movable supporting component.The two ends of the lower supporting plate are each provided with a side supporting baffle. The four corners of the lower supporting plate are each provided with a movable supporting component perpendicular to the lower supporting plate. a groove is formed in the upper half part of the movable supporting component; more than two positioning counter bores are formed in the groove; a supporting block is arranged in a groove of the movable supporting component, the supporting block is triangular angle steel, a through hole matched with the pin is formed in the middle of the supporting block, themovable supporting component is fixedly connected with the supporting block through the pin, and a middle supporting base parallel to the lower supporting plate is fixedly connected to the upper surface of the supporting block