Battery pack and electrical device

Abstract

Battery pack, characterized in that it comprises: a battery set comprising several batteries; a lower cooling plate arranged on the underside of the battery set; an upper cooling plate arranged on the top of the battery set; an outer cooling plate arranged on the outside of the battery set; and an inlet channel comprising a first inlet branch fluidly connected to the lower cooling plate, a second inlet branch fluidly connected to the upper cooling plate, and a third inlet branch fluidly connected to the outer cooling plate, wherein the smallest cross-sectional area of ​​the flow channel of the first inlet branch C1 is the unit mm², the smallest cross-sectional area of ​​the flow channel of the second inlet branch C2 is the unit mm², the smallest cross-sectional area of ​​the flow channel of the third inlet branch C3 is the unit mm², and C2 > C3 > C1.