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 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 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.