BATTERY SYSTEM, ELECTRIC VEHICLE AND COOLING PLATE

A battery system, including a plurality of battery cells stacked along a stacking direction, and at least one cooling plate arranged between two adjacent battery cells of the plurality of battery cells along the stacking direction, wherein the cooling plate includes a chamber for cooling liquid with a deformation structure configured to transfer compressive forces along the stacking direction between opposite sides of the cooling plate facing the adjacent battery cells, and wherein the deformation structure is configured to equalize compressive forces caused by length deviations of the plurality of battery cells along the stacking direction through deformation of at least a portion of the deformation structure at a substantially constant force over a given displacement.