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 . <EOS>