| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a capacity drop detection method of a redox flow battery which can sense lowering of a battery capacity for each cause such as increase of a cell resistance, lowering of open-circuit voltage, and lowering of liquid utilization ratio of electrolyte solution. <P>SOLUTION: A main cell for supplying and draining electrolyte solution of a positive and a negative electrodes and a cell for detection connected so as to commonly use the electrolyte solution with the main cell are provided. At float charging of the main cell 10, a discharge is made at low current for adequate time from the cell for detection, and cell capacity is detected from sensing of a slope of the discharge voltage change. According to this method, capacity lowering due to fall of liquid utilization rate of the electrolyte solution can be detected. <P>COPYRIGHT: (C)2003,JPO |
