A double belt press apparatus includes an upper belt unit, a lower belt unit, a pressing unit, and a guide unit. The guide unit includes a first guide member and a second guide member. The first guide member has a first guide surface extending along one side edge of the upper endless belt. The second guide member has a second guide surface extending along the other side edge of the upper endless belt. The first and second guide members are disposed so that the first and second guide surfaces block the gap between the upper endless belt and a lower endless belt from sides closer to the side edges, respectively.

Systems and methods of producing a solid-state battery cell using an isostatic press system to apply a substantially uniaxial load on the flat surfaces of the cell, while limiting or eliminating the pressure applied to the sides and outside of the cell to minimize or reduce damage to those portions of the cell is provided. The substantially uniaxial force is generally perpendicular to the large planar surface(s) of the cell and portion of the cell being laminated or densified. A cell housing, configured for the number, size and thickness of cells to be processed, is provided that includes one or more receptacles for battery cells. The receptacles of the housing may have a shape and depth to receive individual battery cells or some portion thereof. The housing and the cell structures within the receptacles may be placed in a vacuum sealed sleeve to protect the cells from damage.

A method of forming a consolidated component having a complex shape includes providing a first component having a first shape similar to the complex shape. The method further includes placing the first component in a chamber and surrounding the first component with a medium. The method further includes applying pressure and at least one of heat or electricity into the chamber to process the first component to form a consolidated component having the complex shape.