The invention relates to an EWS module device for electro-winning and/or electro-refining, based on a saturated leaching solution of PLS/electrolyte/raffmate/ILS without solvent extraction, characterised by comprising: a tank (10 and 12); a set of electrolytic cells contained within the tank, wherein the cells are electrically and volumetrically separated by the internal walls of the module (14), with the cells being connected in series by a joining board or capping board (3); an intercellular bar (1); an intercellular bar guide (2); inlet and outlet ducts for the PLS/electrolyte/raffinate/ILS (17) and (11) for each cell independently; and each EWS module is in turn connected to the other modules by an inter-module connector (18), and same in turn control the connection and disconnection of the EWS modules by an interrupter (25); operating process of the EWS module device; and connection and disconnection process between different EWS module devices.