A state estimation device includes: a voltage detecting unit that detects voltages of energy storage devices; and an estimating unit that estimates a charge amount difference between at least two of the energy storage devices. At a reference time point T0 during constant current charging, the estimating unit performs: specific voltage setting for setting, as a specific voltage V0, a voltage of a low-voltage energy storage device at the reference time point T0; time obtaining for obtaining a time point at which a voltage of a high-voltage energy storage device reaches the specific voltage V0; and charge amount difference estimating for estimating the charge amount difference between the at least two energy storage devices based on the reference time point T0, the time point obtained in the time obtaining process, and a current flowing through the plurality of energy storage devices during the constant current charging.
State estimation device, energy storage module, vehicle, and state estimation method
2018-05-15
Patent
Electronic Resource
English
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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 |
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