Bottom support plate, bottom support assembly and battery

The bottom supporting plate is used for limiting the displacement of a naked battery cell in a battery shell and lifting the naked battery cell, the bottom supporting plate comprises a bottom supporting part, the bottom supporting part is provided with at least one circulation channel, and the circulation channel penetrates through the bottom supporting part in the thickness direction of the bottom supporting part; the two limiting parts are arranged on the two sides of the bottom support part in the width direction of the bottom support part; the two limiting parts are connected through the bottom support part; a U-shaped containing groove is defined by the two limiting parts and the bottom supporting part. Wherein the limiting part is made of a heat-conducting silica gel sheet. According to the utility model, the naked battery cell is lifted and limited at the same time, and the naked battery cell is more reliably limited in the height direction and the thickness direction while heat dissipation is facilita