Battery pack lower shell, battery pack shell and battery pack

The utility model provides a battery pack lower shell, a battery pack shell and a battery pack, the battery pack lower shell comprises a lower shell body with an accommodating cavity and a cooling plate arranged in the accommodating cavity, the cooling plate is connected with the lower shell body through a connecting piece, and the cooling plate and the inner wall of the lower shell body are arranged at an interval; the connecting piece is made of heat insulation materials. According to the battery pack lower shell disclosed by the utility model, the connecting piece with the heat insulation material is arranged and is arranged between the cooling plate and the lower shell body, so that the distance is formed between the cooling plate and the lower shell body, the heat exchange between the cooling plate and the outside is reduced, and the cooling efficiency is improved. 本实用新型提供了一种电池包下壳体、电池包壳体及电池包，本实用新型所述的电池包下壳体包括具有容纳腔的下壳体本体，以及设于容纳腔中的冷却板，冷却板通过连接件与下壳体本体相连，且冷却板与下壳体本体的内壁之间间距设置，连接件采用隔热材料制成。本实用新型所述的电池包下壳体，通过设置具有隔热材