| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a secondary battery that can suppress reduction of the battery capacity even after deterioration.SOLUTION: In a control device for a secondary battery are preset a lower limit SOC set value larger than SOC0% and an upper limit SOC set value smaller than SOC 100%. The control device is used within a use potential width determined by the lower limit SOC set value and the upper limit SOC set value. The control device calculates a post-deterioration positive electrode using minimum potential Vwhich shifts from an initial positive electrode using minimum potential Vto a high potential side in connection with deterioration of the secondary battery, and sets a new lower limit SOC set value which is smaller than the preset lower limit SOC set value and larger than SOC0% in accordance with the shift amount (V-V) corresponding to the difference between the positive electrode using minimum potential Vand the initial positive electrode using minimum potential Vafter deterioration.SELECTED DRAWING: Figure 2 |
