A state estimator 141 estimates, based on at least one of a voltage, a current, and a temperature of a secondary battery 20, a state of the secondary battery 20 including a state of charge (SOC) of the secondary battery 20. A discharge controller 142 discharges, when a state of non-use of the secondary battery 20 lasts for a predetermined period of time, the secondary battery 20 such that an indicator indicating easiness of storage deterioration of the secondary battery 20 to progress decreases in stages. The indicator includes a parameter that depends on an SOC of the secondary battery 20. A value of the indicator and a duration of stay in each stage are set such that a predetermined relationship holds between products in a plurality of stages, each of the products being derived from multiplying the value of the indicator and the duration of stay in each stage.
BATTERY MANAGEMENT DEVICE, BATTERY SYSTEM, AND VEHICLE POWER SUPPLY SYSTEM
2020-12-17
Patent
Elektronische Ressource
Englisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / 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 |