Battery seat cask and electric vehicle

The utility model discloses a battery seat cask and an electric vehicle, and relates to the technical field of electric vehicles. The battery seat cask is used for containing first batteries or second batteries, the number of the first batteries is larger than that of the second batteries, and/or the size of the first batteries is larger than that of the second batteries, the battery seat cask comprises a seat cask body and a seat cask accessory detachably connected with the seat cask body, and a containing cavity is formed in the seat cask body; the containing cavity is used for containing a first battery and divided into a first sub-cavity and a second sub-cavity, the first sub-cavity is used for containing a second battery, and the second sub-cavity is used for containing seat cask accessories. The battery seat barrel and the electric vehicle can adapt to batteries with different capacities, so that material waste is avoided, and the development cost of the battery seat barrel is reduced. 本实用新型公开一种电池座桶及电动车