A battery module, comprising: a plurality of battery cells (10a, 10b, 10c), a first cooling connector and a second cooling connector, and a first end-plate and a second end-plate; each of the battery cells (10a, 10b, 10c) having a front side and a rear side being parallel to the front side; the battery cells being aligned along a predefined direction such that respective front and rear sides of the battery cells are perpendicular to the predefined direction; and for any two neighbored battery cells, when viewed into the predefined direction, the respective subsequent battery cell facing with its front side to the rear side of the respective precedent battery cell; the first end-plate having a front side and a rear side parallel to the front side of the first end-plate; the first end-plate being arranged such that the front side and rear side of the first end-plate are perpendicular to the predefined direction; and the rear side of the first end-plate facing the front side of the first battery cell, when viewed into the predefined direction; the cooling connectors (170a, 170b) each having an elongated shape with a longitudinal center axis, one of the first and second cooling connectors being configured for getting connected with an external coolant supply, the other cooling connector being configured for getting connected with an external coolant discharge; wherein the first cooling connector is integrated in the first end-plate, and wherein the longitudinal center axis of the first cooling connector is orientated perpendicular to the predefined direction, wherein the first end-plate comprises a first extrusion profile having a plurality of steps, and wherein each cooling connector is realized by a bore-hole or cut-out in the plurality of steps, in which the cooling connector is integrated. a plurality of battery cells (10a, 10b, 10c), a first cooling connector and a second cooling connector, and a first end-plate and a second end-plate; each of the battery cells (10a, 10b, 10c) having a front side and a rear side being parallel to the front side; the battery cells being aligned along a predefined direction such that respective front and rear sides of the battery cells are perpendicular to the predefined direction; and for any two neighbored battery cells, when viewed into the predefined direction, the respective subsequent battery cell facing with its front side to the rear side of the respective precedent battery cell; the first end-plate having a front side and a rear side parallel to the front side of the first end-plate; the first end-plate being arranged such that the front side and rear side of the first end-plate are perpendicular to the predefined direction; and the rear side of the first end-plate facing the front side of the first battery cell, when viewed into the predefined direction; the cooling connectors (170a, 170b) each having an elongated shape with a longitudinal center axis, one of the first and second cooling connectors being configured for getting connected with an external coolant supply, the other cooling connector being configured for getting connected with an external coolant discharge; wherein the first cooling connector is integrated in the first end-plate, and wherein the longitudinal center axis of the first cooling connector is orientated perpendicular to the predefined direction, wherein the first end-plate comprises a first extrusion profile having a plurality of steps, and wherein each cooling connector is realized by a bore-hole or cut-out in the plurality of steps, in which the cooling connector is integrated.