Electrochemical cell stacks, hot modules, and electrolytic reactors

Abstract

This achieves both an increase in the number of cell cassette layers and stable stacking of the cell stacks. [Solution] The electrochemical cell stack 20A comprises a central plate 22A having an upper surface 221 and a lower surface 222, a first cell cassette group 24 consisting of a plurality of cell cassettes 100 stacked on the upper surface 221 side, and a second cell cassette group 25 consisting of a plurality of cell cassettes 100 stacked on the lower surface 222 side. Each cell cassette comprises a reaction section 110, a frame section 120, and a separator section 130 connecting the reaction section and the frame section. The central plate has higher bending rigidity in the thickness direction than the electrolytic cell 111, interconnector 113, and current collector 112 included in the reaction section of the electrochemical cell stack. The central plate has protruding portions 22a and 22b that protrude outward from the outer casing of the frame section in a plan view, and these protruding portions include at least two parts that face each other in a plan view.

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