Structural element, a battery set, an arrangement of a structural element and a battery set, and an aerospace vehicle

An arrangement comprising:

• a structural element extending along a longitudinal direction and having a main web, a first flange that extends away from the main web and comprises a first flange edge extending along the longitudinal direction, and a second flange that comprises a second flange edge extending along the longitudinal direction and extends away from the main web in a position spaced apart from the first flange, such that the first flange, the second flange, and the main web form a U-shaped profile defining a cavity;
• and
• a battery set comprising:
• a baseplate that is releasably attached to the structural element for mounting the battery set to the structural element, wherein, when the baseplate is attached to the structural element, the baseplate extends from the first flange edge to the second flange edge;
• and
• at least one battery on the baseplate, wherein, when the baseplate is attached to the structural element, the at least one battery on the baseplate is received in the cavity;
• wherein an outer surface of the baseplate facing away from the at least one battery on the baseplate is adapted to be part of an outer wall of an aerospace vehicle when mounted to the structural element;
• and
• wherein the structural element is a spar of a wing of the aerospace vehicle and the outer surface of the baseplate is part of a pressure side surface of the wing of the aerospace vehicle.