Box body of battery pack, battery pack and vehicle

The utility model discloses a box body of a battery pack, the battery pack and a vehicle. The box body of the battery pack comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell, the inner shell is provided with a containing cavity suitable for containing a battery assembly of the battery pack and is in heat conduction contact with the battery assembly, and the heat conductivity coefficient of the inner shell is larger than that of the outer shell. According to the box body of the battery pack provided by the embodiment of the utility model, the box body comprises the inner shell and the outer shell, the heat conductivity coefficient of the inner shell is greater than that of the outer shell, the battery assembly is arranged in the inner shell and is in heat conduction contact with the inner shell, and the inner shell is arranged in the outer shell; and the outer shell with relatively low heat conductivity coefficient can play a heat preservation role on the battery assemb