Secondary battery internal temperature estimation device and secondary battery internal temperature estimation method

A secondary battery internal temperature estimation device that estimates a secondary battery's internal temperature regardless of the secondary battery's type or state of degradation, the device including: a control unit that estimates the secondary battery's internal temperature on...

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Bibliographische Detailangaben
Hauptverfasser:	Takashima, Naoya, Iwane, Noriyasu, Mitsuyama, Taiji
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	A secondary battery internal temperature estimation device that estimates a secondary battery's internal temperature regardless of the secondary battery's type or state of degradation, the device including: a control unit that estimates the secondary battery's internal temperature on the basis of a relational equation showing a relationship between an external temperature and the secondary battery's internal temperature. A control unit calculates element values of an equivalent circuit of the secondary battery, determines a coefficient of the relational equation on the basis of the element values of the equivalent circuit calculated by the control unit, and applies the coefficient obtained by the control unit to the relational equation. The control unit estimates the secondary battery's internal temperature on the basis of the relational equation to which the coefficient has been applied by the control unit.