Battery stack comprising battery modules and a cooling system

A battery stack for an electrified vehicle, the battery stack comprising a cooling system, the battery stack comprising a first and a second battery module, the battery stack extending in a height direction, a width direction and a depth direction, each of the first and the second battery modules comprising battery cells being stacked in the depth direction, the first and the second battery modules comprising a first and a second supporting side wall for supporting the battery cells in the respective battery module, the first and the second supporting side wall of the battery modules being opposing vertical side walls provided on a respective side of the battery cells in the battery modules, the first and the second supporting side wall having a respective inner side facing the battery cells and a respective outer side facing away from the battery cells, the first and/or the second supporting side wall comprising first supporting element(s) adapted to support and bear the load of the battery cells in the first and second battery modules, as seen in the height direction, or alternatively a respective bottom support plate is connected to the first and the second supporting side walls, the first and/or the second supporting side wall comprises liquid cooling channels, the liquid cooling channels being in the form of a groove provided in the first and/or second supporting side wall on an outer side thereof, the groove being covered by a cover plate, arranged on the outer side of the first and/or the second supporting side wall, thereby forming integrated liquid cooling system for the first and the second battery module in the first and/or second supporting side wall.