A casing (10) for a battery cell (100) has at least one plate (1) made of sheet metal closing an inner space (2) of the casing (10) for housing a stack of electrodes. The plate (1) has a length (L), a width (W) and a thickness (t) such that a slenderness ratio of the plate W/t is greater than 10. The plate (1) has at least one stamped bead (3) protruding towards the inner space (2) of the casing (10), which crosses a centerline (C) of the width (W) of the plate (1) and forms a recess (4) facing away from the inner space (2) of the casing (100), the recess (4) having an average width value Q measured at the centerline (C) of the width (W) of the plate (1), characterised in that the average width value Q is greater than 0.3t and less than 3t.