A connecting assembly for a battery module, comprising: a plurality of connecting sheets configured to connect battery cells of the battery module; a sampling assembly comprising a circuit board and a sampling terminal connected to the circuit board , wherein the circuit board is provided with a circuit board opening and the sampling terminal being connected to the plurality of connecting sheets ; and an insulating film disposed at one side of the sampling assembly and the plurality of connecting sheets , and the insulating film connecting the sampling assembly and the plurality of connecting sheets to form an integral structure with the sampling assembly and the plurality of connecting sheets , and an insulating film through hole being provided in a region of the sampling assembly covered by the insulating film, wherein a position of the insulating film through hole corresponds to a position of the circuit board opening; wherein the circuit board is provided with a connecting portion connected to the sampling terminal , and the circuit board opening is disposed close to the connecting portion ; wherein the circuit board opening comprises a circuit board through hole passing through the circuit board and a first groove formed by a side of the circuit board being recessed inward, the circuit board through hole comprises a first transverse section extending along a transverse direction (Y3) of the circuit board, and the first groove is located in an extending direction of the first transverse section and has a gap with the first transverse section ; wherein the insulating film comprises a first insulating film and a second insulating film that are respectively attached to two sides of the sampling assembly and the plurality of connecting sheets , the first insulating film is provided with a first insulating film through hole and the second insulating film is provided with a second insulating film through hole . a plurality of connecting sheets configured to connect battery cells of the battery module; a sampling assembly comprising a circuit board and a sampling terminal connected to the circuit board , wherein the circuit board is provided with a circuit board opening and the sampling terminal being connected to the plurality of connecting sheets ; and an insulating film disposed at one side of the sampling assembly and the plurality of connecting sheets , and the insulating film connecting the sampling assembly and the plurality of connecting sheets to form an integral structure with the sampling assembly and the plurality of connecting sheets , and an insulating film through hole being provided in a region of the sampling assembly covered by the insulating film, wherein a position of the insulating film through hole corresponds to a position of the circuit board opening; wherein the circuit board is provided with a connecting portion connected to the sampling terminal , and the circuit board opening is disposed close to the connecting portion ; wherein the circuit board opening comprises a circuit board through hole passing through the circuit board and a first groove formed by a side of the circuit board being recessed inward, the circuit board through hole comprises a first transverse section extending along a transverse direction (Y3) of the circuit board, and the first groove is located in an extending direction of the first transverse section and has a gap with the first transverse section ; wherein the insulating film comprises a first insulating film and a second insulating film that are respectively attached to two sides of the sampling assembly and the plurality of connecting sheets , the first insulating film is provided with a first insulating film through hole and the second insulating film is provided with a second insulating film through hole . <EOS>