A battery package including a fixing member, a device including the same, and a battery package manufacturing method are provided. The battery package includes: a battery module including a plurality of battery cells; a tray disposed at a lower end of the battery module and receiving the battery module; and a bracket adjacent to one side of the tray and mounted and coupled to one side surface of the lower end of the battery module, wherein at least one of a surface of the bracket in contact with the battery module and a surface of the tray in contact with the one side surface of the lower end of the battery module and disposed adjacent to the bracket may have a wedge shape.