Abstract: An electrochemical hydrogen compression system includes a hydrogen gas compression part that compresses hydrogen by applying a current between an anode and a cathode provided on two surfaces of a proton exchange film, and a supply pipeline that guides hydrogen discharged from a hydrogen supply source to the hydrogen gas compression part. The hydrogen gas compression part has an outlet for discharging unreacted hydrogen. The electrochemical hydrogen compression system further includes a film resistance meter and a voltmeter that acquire information related to a wet state of the proton exchange film, a fourth opening/closing part and a fifth opening/closing part that regulate discharge of hydrogen from the outlet, and a control device that controls the fourth opening/closing part and the fifth opening/closing part. The control device controls the fourth opening/closing part and the fifth opening/closing part based on at least the wet state of the proton exchange film.

Abstract: A water electrolysis system includes a water supply unit, a KOH tank, a water electrolysis apparatus, and a control device. The water supply unit and the KOH tank supply an aqueous solution containing hydroxide ions of a predetermined concentration to a cathode of the water electrolysis apparatus. The water electrolysis apparatus includes a solid polymer electrolyte membrane, and a water electrolysis cell having an anode and a cathode provided on both sides of the solid polymer electrolyte membrane. The control device changes the voltage to increase while restricting a supply amount of a KOH aqueous solution to the cathode when a concentration of the KOH aqueous solution is higher than a predetermined reference concentration on the basis of information on correspondence between a voltage and current between the anode and the cathode and the concentration of the KOH aqueous solution on the cathode.

Abstract: A water electrolysis system includes a water electrolysis cell, a power supply, an oxygen tank, and a control device. The water electrolysis cell has a solid polymer electrolyte membrane and an anode and a cathode provided on both sides of the solid polymer electrolyte membrane in a thickness direction. The water electrolysis cell electrolyzes water by applying a voltage between the anode and the cathode using the power supply. The control device makes the pressure of oxygen generated at the anode relatively higher than the pressure of hydrogen generated at the cathode according to the electrolysis of the water in the water electrolysis cell. The control device makes the pressure of the anode side of the solid polymer electrolyte membrane relatively higher than the pressure of the cathode side by supplying the oxygen from the oxygen tank to the anode before the electrolysis starts.

Abstract: An electrochemical hydrogen compression system includes a hydrogen gas compression part that compresses hydrogen by applying a current between an anode and a cathode provided on two surfaces of a proton exchange film, and a supply pipeline that guides hydrogen discharged from a hydrogen supply source to the hydrogen gas compression part. The hydrogen gas compression part has an outlet for discharging unreacted hydrogen. The electrochemical hydrogen compression system further includes a film resistance meter and a voltmeter that acquire information related to a wet state of the proton exchange film, a fourth opening/closing part and a fifth opening/closing part that regulate discharge of hydrogen from the outlet, and a control device that controls the fourth opening/closing part and the fifth opening/closing part. The control device controls the fourth opening/closing part and the fifth opening/closing part based on at least the wet state of the proton exchange film.

Abstract: An N-type diffusion layer fixed at a potential equal to or above 0V is provided in a segregating region between terminals, and a P-type diffusion layer having a potential equal to that of the N-type diffusion layer on an N-type well constitute a drain of a transistor.

Abstract: An N-type diffusion layer fixed at a potential equal to or above 0V is provided in a segregating region between terminals, and a P-type diffusion layer having a potential equal to that of the N-type diffusion layer on an N-type well constitute a drain of a transistor.