| 摘要 |
PROBLEM TO BE SOLVED: To provide a charging rate calculation device capable of improving charging rate estimation accuracy of a secondary battery, and a storage battery system.SOLUTION: A charging rate calculation device 15 for a secondary battery 14 comprises: a charging/discharging current detecting unit 22 which detects a charging/discharging current value of the secondary battery 14; a terminal voltage detecting unit 23 which detects a terminal voltage value of the secondary battery 14; a first estimating unit 24 which estimates a first charging rate by integrating the charging/discharging current value; a second estimating unit 25 which estimates a second charging rate on the basis of the relationship between the release voltage value and charging rate of the secondary battery 14; and a charging rate calculating unit 26 which calculates a third charging rate on the basis of the first and second charging rates weighted on the basis of the charging/discharging current value, respectively.SELECTED DRAWING: Figure 2 |
