Described herein are techniques to accurately detect that a secondary battery has been replaced. A secondary battery state detecting device detects a state of a secondary battery installed in a vehicle. The device includes a control unit that learns element values of an equivalent circuit of the secondary battery on the basis of a voltage and a current of the secondary battery. The control unit also compares the element values obtained through learning at different timings and, when at least one of the element values has changed more than or equal to a predetermined threshold value, determines that the secondary battery has been replaced.
Secondary battery state detection device and secondary battery state detection method
2019-10-08
Patent
Electronic Resource
English
IPC: | G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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