Battery box

The invention relates to a battery box (1) for an electric vehicle. In order to provide a lightweight and simultaneously stable battery box, the battery box according to the invention has a groove-shaped part (10) made of sheet metal and an inner part (20) made of sheet metal, the groove-shaped part (10) comprises a horizontally extending bottom plate part (11), side wall parts (14) arranged on two sides in the transverse direction (Y) and extending in the upward direction from the bottom plate part (11), and the inner part (20) is arranged between the wall parts (14) and is connected to the groove-shaped part (10). A floor part (21, 22) facing the floor part (11) and at least one ridge part (23) protruding relative to the floor part (21, 22), the at least one ridge part (23) being integrally connected to the at least one floor part (21, 22) and extending in a transverse direction (Y), the at least one floor part (21, 22) being horizontally spaced from the floor part (11) at least in some regions, the first i