A battery module (100) comprising at least one battery cell system (1) having at least two battery cells (11), wherein the battery cell system (1) comprises a pouch film (3) and at least two electrode composites (5), wherein an electrode composite (5) comprises at least one anode and at least one cathode, and wherein the pouch film (3) forms pockets (12) separated from one another, in particular situated alongside one another, for introducing respectively at least one electrode composite (5), such that each pocket (12) together with electrode composite (5) forms a pouch cell (10), and wherein the pockets (12) are connected to one another physically in a foldable manner via the pouch film (3) and wherein the battery module (100) has a movement-flexible, foldable enclosure (20), which encloses the entire battery cell system (1) and the voltage tap of the battery module (100).