Device for rolling a metal lithium band

A device for rolling a metal lithium band including a rolling area comprising at least two rolling cylinders between which a lithium band with a first thickness is intended to pass, each rolling cylinder rotating about an axis of rotation, a feed-in area comprising means for feeding in the rolling area with the lithium band with a first thickness, means for feeding in two plastic material films so that each plastic material film is interposed between the lithium band with a first thickness and a rolling cylinder, called associated rolling cylinder, and a storage area including means for collecting a lithium band with a second thickness having a second thickness smaller than the first thickness, wherein the device also includes means for tensioning the lithium band with a second thickness and separation means configured to ensure a separation of each plastic material film off the surface of one of the rolling cylinders on the storage area side in a separation area located beyond a horizontal plane passing through the axis of rotation of said rolling cylinder and located opposite the other rolling cylinder, said separation area including said horizontal plane.