Patent ID: 9069046
Filing Date: 2015-06-30
Classification: B60L,G01R,H01M,Y02E,Y02T

Abstract:
1. An estimation apparatus of estimating a deterioration state of a secondary battery, comprising: a current sensor measuring an electric current of the secondary battery; a current estimating section estimating the electric current of the secondary battery by using a battery model; and a deterioration estimating section estimating a second deterioration component produced in association with a salt concentration imbalance in the secondary battery by using the measured current obtained from the current sensor, the estimated current obtained from the current estimating section, and a first deterioration component produced in association with wear of the secondary battery, wherein the deterioration estimating section corrects the estimated current by using a ratio between a resistance change rate of the secondary battery when the second deterioration component is eliminated and a resistance change rate during charge and discharge of the secondary battery.