Structural assembly of a cell of an electrolyzer, electrolyzer, and method of manufacturing such structural assembly

A structural assembly of a cell of an electrolyzer of a staple-type having a plurality of cells stacked in an axial direction, the structural assembly comprising:

• a main frame having a mounting surface and a seating surface;
• a pressure frame arrangement;
• and a membrane arrangement abutting against the seating surface and being sandwiched between the main frame and the pressure frame arrangement in an axial direction, wherein a common axial extension of the membrane arrangement and the pressure frame arrangement in an assembled state is set by an axial distance between the seating surface and the mounting surface and is reached by an axial pressure force applied during assembly, wherein a reduction of the common axial extension is predominantly provided by an axial extension reduction of the pressure frame arrangement.

A method of manufacturing a pressure frame arrangement, comprising the steps of:

• providing an outer shape for a pressure frame part;
• and providing a geometrical shape providing for elasticity by geometry within the forming step and/or an additional material removal step.

A method of manufacturing a structural assembly, comprising the steps of:

• manufacturing a main frame;
• and manufacturing a pressure frame arrangement in dependency of an axial distance between a mounting surface and a seating surface of the main frame and an axial extension of the membrane arrangement so that a reduction of a common axial extension is predominantly provided by an axial extension reduction of the pressure frame arrangement.

A method of assembling an electrolyzer of a staple-type, comprising the steps of:

• providing a plurality of electrolyzer cells;
• and assembling the cells between two end plates of the electrolyzer by applying an axial pressure force, thereby reducing a common axial extension of a pressure frame arrangement and a membrane in an axial direction, wherein the reduction of the common axial extension is predominantly provided by an axial extension reduction of the pressure frame arrangement.