A separator assembly for a battery module, the separator assembly comprising an insulating plate, a circuit board, busbars and connection sheets, the circuit board being arranged on the insulating plate, the busbars being arranged on the insulating plate on at least one side of the circuit board, the connection sheets being connected between the busbars and the circuit board;
- wherein the connection sheets comprise an upper connection sheet and a lower connection sheet, the insulating plate comprising a first surface and a second surface opposite to each other, the upper connection sheet being arranged on the first surface, the insulating plate and the lower connection sheet being arranged to be at least partially overlapped in a height direction of the separator assembly, and at least a portion of the lower connection sheet being arranged on the second surface.