MANUFACTURING APPARATUS OF BATTERY CELL

An apparatus to weld resin pieces of a battery together during manufacture of a battery cell includes a first hot plate that pressurizes and heats exterior materials forming a container of the battery cell and resin pieces in a layering direction at a position of an opening of the container, thereby sealing the opening. A second hot plate pressurizes and heats edges of the exterior materials stacked in the layering direction at least in the layering direction, thereby sealing an edge portion of the container.