SECONDARY BATTERY INTERNAL TEMPERATURE ESTIMATION DEVICE AND SECONDARY BATTERY INTERNAL TEMPERATURE ESTIMATION METHOD

摘要

Problem;To estimate an accurate internal temperature of a secondary battery, regardless of the type and state of degradation of the secondary battery.;Solution;A secondary battery internal temperature estimation device (1) that estimates an internal temperature of a secondary battery (14), the device including: an estimation means (control unit (10)) that estimates an internal temperature of the secondary battery on the basis of a relational equation showing a relationship between an external temperature and the internal temperature of the secondary battery; a calculation means (control unit (10)) that calculates element values of an equivalent circuit of the secondary battery; a determination means (control unit (10)) that determines a coefficient of the relational equation on the basis of the element values of the equivalent circuit calculated by the calculation means; and an application means (control unit (10)) that applies the coefficient obtained by the determination means to the relational equation; wherein the estimation means estimates the internal temperature of the secondary battery on the basis of the relational equation to which the coefficient has been applied by the application means.

主权项

1. A secondary battery internal temperature estimation device that estimates an internal temperature of a secondary battery, the device comprising:
an estimation means that estimates an internal temperature of a secondary battery on the basis of a relational equation showing a relationship between an external temperature and the internal temperature of the secondary battery; a calculation means that calculates element values of an equivalent circuit of the secondary battery; a determination means that determines a coefficient of the relational equation on the basis of the element values of the equivalent circuit calculated by the calculation means; and an application means that applies the coefficient obtained by the determination means to the relational equation; wherein the estimation means estimates the internal temperature of the secondary battery on the basis of the relational equation to which the coefficient has been applied by the application means.