SUPPLY UNIT

The supply unit (1) for an electric motorbike (2) comprises at least two electric batteries (6, 7, 8, 9) and at least a protection container (10, 11, 12) which contains the batteries (6, 7, 8, 9) and which comprises: a cooling plate (12) placed in contact with the batteries (6, 7, 8, 9) and having: a plurality of through holes (13) which communicate with the outside and which cross the cooling plate (12) in the direction of its width and/or its length, each of the holes (13) having an access on a first perimeter side (12a) of the cooling plate (12) and an exit on an opposite second perimeter side (12b) of the cooling plate (12); and two opposite transmission faces (17, 18) in contact with which are placed one or more batteries (6, 7, 8, 9), between the faces (17, 18) being obtained the through holes (13); two cooling half-shells (10, 11), each containing at least one of the batteries (6, 7, 8, 9) and placed in contact with the batteries (6, 7, 8, 9), the half-shells (10, 11) being separated from the cooling plate (12) and joined thereto in correspondence of the transmission faces (17, 18).