Provided are a charge rate estimation device and charge rate estimation method for estimating with good precision the charge rate of a cell that has considerable polarization, that requires a long time to depolarize, and that has considerable charging and discharging hysteresis in SOC-OCV characteristics. The charge rate estimation device comprises: a voltage measurement unit for measuring the closed circuit voltage of a cell; a charge estimation unit for referencing charge mode information in which the charge rate and the closed circuit voltage of a cell when a charger is charging at a constant electric current using the measured closed circuit voltage are correlated, and estimating the charge rate in charge mode; and a discharge estimation unit for referencing discharge mode information in which the charge rate and the closed circuit voltage generated using a discharge pattern of the a cell obtained by actuating a vehicle using a determined actuation pattern using the measured closed circuit voltage are correlated, and estimating the charge rate in discharge mode.
Charge rate estimation device and charge rate estimation method
2015-09-23
Patent
Elektronische Ressource
Englisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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