Battery control device, charging / discharging system, parking lot system, secondary battery reuse system, battery control method, and battery control program

摘要

Problem to be solved: to diagnose the deterioration state of the rechargeable battery.According to an embodiment, the battery control device includes a charge / discharge circuit and a processor.ProcessorBased on the information on the secondary battery electrically connected to the charge / discharge circuit, it is determined whether or not the diagnostic conditions for the secondary battery are satisfied.If the diagnostic condition is determined to be satisfied,The charging and discharging circuit is controlled so that the secondary battery is discharged or charged to the charge start SOC and then chargedThe measurement data of the voltage and the current of the secondary battery is acquired while the secondary battery is being chargedInternal state parameters of the rechargeable battery are estimated based on the measured data.Based on the estimation of the internal state parameters of the secondary battery, the deterioration state of the secondary battery is diagnosed.Diagram