Water electrolysis system

Abstract

A water electrolysis system includes: a water electrolysis device configured to perform water electrolysis; a water supply device configured to supply water to the water electrolysis device; a power supply configured to supply current to the water electrolysis device; and a control unit. The control unit is configured to adjust a current density of the current supplied from the power supply to the water electrolysis device, and adjust a water flow rate of the water supplied from the water supply device to the water electrolysis device. The control unit is configured to: measure the water flow rate and the current density during operation of the water electrolysis device; and perform an operation change when at least one of the water flow rate and the current density during the operation of the water electrolysis device is outside a corresponding one of threshold ranges.

What is claimed is: 
     
         1 . A water electrolysis system comprising:
 a water electrolysis device configured to perform water electrolysis;   a water supply device configured to supply water to the water electrolysis device;   a power supply configured to supply current to the water electrolysis device; and   a control unit, wherein
 the control unit is configured to adjust a current density of the current supplied from the power supply to the water electrolysis device, 
 the control unit is configured to adjust a water flow rate of the water supplied from the water supply device to the water electrolysis device, 
 the control unit includes a data group indicating a target operating state of the water electrolysis device that is determined from the water flow rate and the current density, 
 the control unit is configured to measure the water flow rate and the current density during operation of the water electrolysis device, 
 the control unit is configured to check the water flow rate and the current density during the operation of the water electrolysis device against the data group, and determine whether the water flow rate and the current density are outside respective threshold ranges corresponding to the target operating state, and 
 the control unit is configured to perform an operation change when at least one of the water flow rate and the current density during the operation of the water electrolysis device is outside a corresponding one of the threshold ranges. 
   
     
     
         2 . The water electrolysis system according to  claim 1 , wherein the control unit is configured to perform a stop control, as the operation change, that sets the current density to zero. 
     
     
         3 . The water electrolysis system according to  claim 1 , wherein the control unit is configured to control, as the operation change, the at least one of the water flow rate and the current density such that the water electrolysis device is in the target operating state.