Patent ID: 8148993
Filing Date: 2012-04-03
Classification: B60K,B60W,Y02T

Abstract:
1. An abnormality detecting device for detecting an abnormality in at least either a current sensor for detecting a charging/discharging current flowing to a secondary battery or a voltage sensor for detecting a battery voltage of said secondary battery, comprising: an electromotive force calculating section for calculating an electromotive force E of said secondary battery by subtracting a polarized voltage Vp from a no-load battery voltage V0, wherein said polarized voltage is calculated with at least a charging/discharging current I of said secondary battery detected by said current sensor as a parameter; an estimated voltage calculating section for calculating an estimated battery voltage Vs on the basis of said electromotive force, an internal resistance r of said secondary battery, and the charging/discharging current I detected by said current sensor; and an abnormality judgment section for comparing the battery voltage V of the secondary battery detected by said voltage sensor and said estimated battery voltage Vs, and if a difference thereof is greater than a predetermined threshold, judging that at least either said current sensor or said voltage sensor is abnormal.