| 摘要 |
PROBLEM TO BE SOLVED: To obtain battery characteristics capable of estimating more exact battery capacity by considering the degradation of the second battery and temperature. SOLUTION: Battery characteristics are obtained by correcting the initial battery characteristics of the second battery with a temperature correction coefficient indicating temperature dependence of the battery characteristics of the second battery, an internal resistance degradation correction coefficient indicated by the ratio of the initial internal resistance and the internal resistance in degradation time and a capacity degradation correction coefficient indicated by the ratio of discharge capacity in degradation time and initial discharge capacity. The internal resistance degradation correction coefficient is calculated based on the internal resistance R of the second battery calculated with discharge IV characteristics f0, f1 obtained from the discharge current I and the discharge voltage V. The capacity degradation correction coefficient is calculated based on the discharge capacity calculated from the relation between the discharge quantity and estimated open voltage obtained from the discharge characteristics. |
