A multi-stack electrochemical hydrogen compressor (EHC) system is provided. The EHC system may have two or more EHC stacks, wherein each EHC stack includes at least one electrochemical cell and a power supply. The EHC system may also have a controller in communication with the power supply of each EHC stack, wherein the controller is configured to reduce total energy consumption of the EHC system by independently controlling the power supply of each EHC stack.

The present disclosure is directed to a method for tuning the performance of at least one electrochemical cell of an electrochemical cell stack. The method includes supplying power to an electrochemical cell stack. The electrochemical cell stack includes a plurality of electrochemical cells. The method further includes monitoring a parameter of at least one electrochemical cell and determining if an electrochemical cell becomes impaired. The method also includes diverting a fraction of the current flow from the impaired electrochemical cell during operation of the electrochemical cell stack.

The present disclosure is directed to a method for tuning the performance of at least one electrochemical cell of an electrochemical cell stack. The method includes supplying power to an electrochemical cell stack. The electrochemical cell stack includes a plurality of electrochemical cells. The method further includes monitoring a parameter of at least one electrochemical cell and determining if an electrochemical cell becomes impaired. The method also includes diverting a fraction of the current flow from the impaired electrochemical cell during operation of the electrochemical cell stack.

The present invention relates to an electrode assembly, electrode structures and an electrolyser using said assemblies/structures, and in particular provides an electrode assembly comprising an anode structure and a cathode structure, each of said anode structure and cathode structure comprising i) a flange which can interact with a flange on an another electrode structure to hold a separator in between the two, ii) an electrolysis compartment which contains an electrode, and which in use contains a liquid to be electrolysed, iii) an inlet for the liquid to be electrolysed and iv) an outlet header for evolved gas and spent liquid, wherein the outlet header on one of the anode structure and the cathode structure is an external outlet header and the outlet header on the other one of the anode structure and the cathode structure is an internal outlet header, as well as to electrolysers comprising a plurality of such electrode assemblies.

Provided is a method of testing for a leak in a fluid system. The method includes submerging at least a portion of an electrically conductive body in an electrolyte solution, with the electrically conductive body and electrolyte solution being in an internal chamber of a device. The method further includes directing an electrical signal to the electrically conductive body, causing a reaction between the electrically conductive body and the electrolyte solution to produce hydrogen. The method further includes injecting the hydrogen into the fluid system for leak detection.

Provided are a gasket and an electrolyzer capable of preventing an electrolyte or a gas from leaking from a diaphragm. An annular gasket includes first and second surfaces which respectively contact a frame near a positive electrode and a frame near a negative electrode and a slit portion which is opened inward and is provided in the entire periphery of the gasket so as to accommodate an edge of an ion-permeable diaphragm.

There are provided electrochemical methods and systems to form one or more organic compounds or enantiomers thereof selected from the group consisting of substituted or unsubstituted dioxane, substituted or unsubstituted dioxolane, dichloroethylether, dichloromethyl methyl ether, dichloroethyl methyl ether, chloroform, carbon tetrachloride, phosgene, and combinations thereof.

The present invention relates to an electrode assembly and an electrolyser using said assemblies/structures, wherein the electrode assembly comprises an anode structure and a cathode structure, each of said anode structure and cathode structure comprising an outlet header for evolved gas and spent liquid, wherein each of said anode structure and cathode structure comprising an outlet header for evolved gas and spent liquid, wherein the outlet header on the anode structure has a total internal volume of V.sub.A cm.sup.3 and the outlet header on the cathode structure has a total volume of V.sub.C cm.sup.3 wherein V.sub.A is less than V.sub.C, and/or i) the outlet header on the anode structure has an internal volume, V.sub.A cm.sup.3, an internal cross sectional area at the exit end of the header of A.sub.A cm.sup.2 and an internal length L.sub.A cm, and ii) the outlet header on the cathode structure has an internal volume, V.sub.C cm.sup.3, an internal cross sectional area at the exit end of the header of A.sub.C cm.sup.2 and an internal length L.sub.C cm, and one or both of the ratios V.sub.A/(A.sub.AL.sub.A) and V.sub.C/(A.sub.CL.sub.C) are less than 1.

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An electrochemical device is provided that includes a stack of a plurality of electrochemical units that succeed one another in a stacking direction and each include an electrochemically active membrane electrode assembly, at least one gas diffusion layer and a bipolar plate having at least one flow field, in which at least one flow field is sealed off simply and reliably and the occurrence of parasitic flows is prevented, wherein at least one bipolar plate has at least one edge web, which borders a flow field of the bipolar plate and is in contact with a gas diffusion layer adjacent to the bipolar plate, and wherein the electrochemical device further includes at least one flow field seal element that seals off the flow field bordered by the edge web and is in contact with the edge web and in contact with the gas diffusion layer.

An engine system 10A is characterized by having a first electrolyzing device 11A for electrolyzing water into hydrogen and oxygen, an engine 12 which runs on the combustion of a mixed gas of the hydrogen and oxygen generated by the first electrolyzing device 11A, a battery 14 for storing electricity, a boosting coil 16 for boosting the voltage of electricity stored in the battery and supplying the boosted high-voltage electricity to the first electrolyzing device 11A and ignition plugs of the engine 12, and an alternator 15 for generating electricity from the running of the engine and supplying the generated electricity to the battery 14. The engine system can be driven by simply replenishing water without requiring construction of refilling stands or replacement of tanks.