Battery assembly and battery pack

The utility model relates to a battery assembly and a battery pack, and the battery assembly comprises a plurality of batteries, and the adjacent batteries are stacked through corresponding stacking surfaces; the cooling plate body is arranged between the adjacent batteries and comprises two cooling plate surfaces which are respectively arranged corresponding to the stacking surfaces of the adjacent batteries; the supporting piece is arranged on at least one cooling plate surface in a protruding manner, the part, protruding out of the cooling plate surface, of the supporting piece forms a supporting surface spaced from the cooling plate surface, and the supporting surface abuts against a stacking surface, corresponding to the cooling plate surface, in the battery. According to the battery assembly with the cooling structure, provided by the utility model, the heat dissipation surface of the horizontal battery is expanded, the heat dissipation of the stacking surface in the battery is realized, and meanwhile,