An interconnector for a stack of solid oxide cells of the SOEC/SOFC type, intended to be arranged between two adjacent electrochemical cells, which includes a flat face whereon at least one first group of identical first elements in relief and a second group of identical second elements in relief are formed, the first elements in relief having different geometric features with respect to the second elements in relief, the height of each first element in relief being different from the height of each second element in relief, the contact width of each first element in relief being different from the contact width of each second element in relief.

The disclosure describes an energy supply device for an electrolysis unit and an electrolysis installation comprising the energy supply device and an electrolysis unit connected thereto.

The invention relates to a water electrolyzer system (1) for producing hydrogen. According to the invention, the water electrolyzer system (1) comprises an electrolysis stack (8) for converting water into hydrogen, a power electronics means (12) for transforming the alternating current into a direct current in order to supply the electrolysis stack (8), components (56, 64, 72, 80) for preparing the process media supplied to and discharged from the electrolysis stack (8), and a control unit (18) for controlling the electrolysis stack (8), as well as the power electronics means (12) and the components (56, 64, 72, 80) for preparing the media. At least the electrolysis stack (8), the power electronics means (12), and the control unit (18) are formed together as an electrolyzer module (36), and the components (56, 64, 72, 80) for preparing and conveying the media are formed together as a process module (52). The modules (36, 52) are provided with connection means (32, 40, 48, 84), via which the individual modules (36, 52) can be fluidically and electrically connected together.

A series of cells for use in an electrochemical device, such as an electrochemical cell or battery, that can operate in a single bulk electrolyte solution shared among the cells. Methods of producing hydrogen or both hydrogen and electricity in appreciable quantities and in various ratios, and vehicles or other devices and applications powered by electrochemical devices comprising the series.