| 摘要 |
Object To provide a redox flow battery where it is possible to know the charging/discharging state inside the cell stack and to use the battery with higher efficiency, and a method of operating the same. Solution A redox flow battery includes: a positive electrolyte storage tank; a negative electrolyte storage tank; a cell stack; a positive electrolyte outward path that sends positive electrolyte, which has been sent out from the positive electrolyte storage tank, to positive electrode chambers of cells in the cell stack; a positive electrolyte return path that sends positive electrolyte, which has flowed out from the positive electrode chambers, to the positive electrolyte storage tank; a negative electrolyte outward path that sends negative electrolyte, which has been sent out from the negative electrolyte storage tank, to negative electrode chambers of the cells; a negative electrolyte return path that sends negative electrolyte, which has flowed out from the negative electrode chambers, to the negative electrolyte storage tank; an entrance open circuit voltage measuring portion that measures an upstream open circuit voltage between the positive electrolyte inside the positive electrolyte outward path and the negative electrolyte inside the negative electrolyte outward path; and an exit open circuit voltage measuring portion that measures a downstream open circuit voltage between the positive electrolyte inside the positive electrolyte return path and the negative electrolyte inside the negative electrolyte return path, and can be operated more efficiently by controlling the flow rate of electrolyte in accordance with the values of the measured entrance open circuit voltage and exit open circuit voltage. |
