CONTROL DEVICE FOR SECONDARY BATTERY

A control device includes a diagnosis unit configured to diagnose a deterioration state of a secondary battery. The diagnosis unit includes: a resistance calculator configured to calculate a direct current resistance and a reaction resistance of impedance components based on an impedance measurement...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAGAMI, Yuji, UCHIYAMA, Masaki, UMEMOTO, Hisashi, YOSHIDA, Shuhei
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TESTING
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Beschreibung
Zusammenfassung:	A control device includes a diagnosis unit configured to diagnose a deterioration state of a secondary battery. The diagnosis unit includes: a resistance calculator configured to calculate a direct current resistance and a reaction resistance of impedance components based on an impedance measurement result of the secondary battery; an index value calculator configured to calculate an index value related to the direct current resistance and the reaction resistance; and a deterioration determination unit configured to compare the index value with a determination threshold based on an impedance characteristic at the time of normal deterioration of the secondary battery so as to determine whether a specific deterioration occurs due to charge and discharge of the secondary battery.