ELECTROLYSIS OR CO-ELECTROLYSIS REACTOR (SOEC) OR FUEL CELL (SOFC) WITH ELECTROCHEMICAL CELL STACKING BY PREASSEMBLED MODULES, AND ASSOCIATED PRODUCTION PROCESS

An electrochemical device may be formed by assembly by stacking preassembled modules, each of these modules being produced as a usual stack of electrochemical cells. The manufacture of preassembled modules can make it possible to produce electrochemical devices with a large number of electrochemical cells, without the bracing problems present and excessive crushing courses that are encountered in the cell stacks according to the prior art, i.e., in a single block.