NOVELTY - The electronic part for manufacturing a component for guiding an operating medium in a stack in a stacking direction of stacked cells of an electrochemical battery, comprises a first side (16) with a surface structure (6) for supplying and discharging the operating medium to or from a first cell stack and a second side with a surface structure for the supply and discharge of the operating medium to or from a second cell stack. The component is formed about a first rotational symmetry perpendicular to the stacking direction of the cell stack extending axis with respect to an angle of 180 degrees .    USE - The electronic part is useful for manufacturing a component for guiding an operating medium in a stack in a stacking direction of stacked cells of an electrochemical battery, where the stacked cells include fuel cells, humidification cells for humidification of process gases of fuel cells or electrolysis cells (claimed).    ADVANTAGE - The electronic part is capable of efficiently and economically manufacturing the component in a simple manner with high accuracy.    DETAILED DESCRIPTION - The electronic part for manufacturing a component for guiding an operating medium in a stack in a stacking direction of stacked cells of an electrochemical battery, comprises a first side (16) with a surface structure (6) for supplying and discharging the operating medium to or from a first cell stack and a second side with a surface structure for the supply and discharge of the operating medium to or from a second cell stack. The component is formed: about a first rotational symmetry perpendicular to the stacking direction of the cell stack extending axis with respect to an angle of 180 degrees ; and about a second rotational symmetry perpendicular to the stacking direction of the cell stack and perpendicular to the first axis extending towards the second axis with respect to an angle of 180 degrees . The first side and second side are formed itself about an axis extending rotational symmetrically in the stacking direction with respect to an angle of 180 degrees . The first side and/or second side comprises an outer portion (3) and an inner portion (4), where the surface structure is located in the inner portion and the components coming into contact with the succession stacking in the cell stack are located in the outer portion. The surface structure comprises embossments in the surface of the component, a manifold structure for distributing the operating medium over the surface of the first side or the second side and/or a collecting structure for collecting the operating medium from the surface of the first side or the second side, channels (5, 8) extending perpendicular to the stacking direction for supplying the operating medium to the manifold structure or for discharging the medium from the collecting structure. The outer portion comprises a system extending in the stacking direction for supplying and discharging the medium along the cell stack. A seal: for sealing the inner portion relative to the environment of the battery is formed in the outer portion; serves for sealing the channels respectively against each other and sealing the channels relative to the inner portion and to the environment of the cell; and is electrically insulative. The rectangular or square shaped component is designed in the stacking direction. The component electrically connects an electrode of a first electrochemical cell with an electrode of a second electrochemical cell in the stack in the stacking direction of stacked electrochemical cells. INDEPENDENT CLAIMS are included for:    (1) a method of producing a cell stack; and    (2) a cell stack.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a front side of an electronic part.    Outer portion (3)    Inner portion (4)    Channels (5, 8)    Surface structure (6)    First side. (16)