A battery module, characterized in comprising: a plurality of battery unit array structures, each of the plurality of battery unit array structures comprising a plurality of battery units and a plurality of busbars electrically connected to the plurality of battery units; a first cover body; and a second cover body, wherein the first cover body is connected to the second cover body, and the plurality of battery unit array structures is arranged between the first cover body and the second cover body, the first cover body comprises a first carrying portion and a second carrying portion, and the first carrying portion and the second carrying portion is in a split structure, the plurality of battery unit array structures includes a first battery unit array structure and a second battery unit array structure, the first battery unit array structure is disposed opposite to the first carrying portion, and the second battery unit array structure is disposed opposite to the second carrying portion, the first cover body further comprises a first fixing portion and a second fixing portion, the first fixing portion is connected to the first carrying portion and extends in a direction away from the second battery unit array structure, and the second fixing portion is connected to the second carrying portion and extends in a direction away from the first battery unit array structure, the second cover body comprises a main plate, a third fixing portion and a fourth fixing portion, and the third fixing portion and the fourth fixing portion are respectively connected to two ends of the main plate, and the first fixing portion is disposed opposite and fixed to the third fixing portion, and the second fixing portion is disposed opposite and fixed to the fourth fixing portion. a plurality of battery unit array structures, each of the plurality of battery unit array structures comprising a plurality of battery units and a plurality of busbars electrically connected to the plurality of battery units; a first cover body; and a second cover body, wherein the first cover body is connected to the second cover body, and the plurality of battery unit array structures is arranged between the first cover body and the second cover body, the first cover body comprises a first carrying portion and a second carrying portion, and the first carrying portion and the second carrying portion is in a split structure, the plurality of battery unit array structures includes a first battery unit array structure and a second battery unit array structure, the first battery unit array structure is disposed opposite to the first carrying portion, and the second battery unit array structure is disposed opposite to the second carrying portion, the first cover body further comprises a first fixing portion and a second fixing portion, the first fixing portion is connected to the first carrying portion and extends in a direction away from the second battery unit array structure, and the second fixing portion is connected to the second carrying portion and extends in a direction away from the first battery unit array structure, the second cover body comprises a main plate, a third fixing portion and a fourth fixing portion, and the third fixing portion and the fourth fixing portion are respectively connected to two ends of the main plate, and the first fixing portion is disposed opposite and fixed to the third fixing portion, and the second fixing portion is disposed opposite and fixed to the fourth fixing portion.