State-of-charge estimation device and state-of-charge estimation method

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State-of-charge estimation device and state-of-charge estimation method

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NISHIGAKI KENJI / KIDONO MASASHI / TSUZUKU TAKAHIRO / NOMURA HIROYUKI

A state-of-charge estimation device and a state of charge estimation method are provided that estimate a state of charge in a battery having a large polarization, requiring a long time for depolarization, and having a large charge/discharge hysteresis in its SOC-OCV characteristics. The state-of-charge estimation device includes a voltage measuring unit which measures a closed circuit voltage in a battery, a charge estimation unit which estimates a state of charge in a charge mode by referring to charge mode information that associates a closed circuit voltage with a state of charge in the battery, and a discharge estimation unit which estimates a state of charge in a discharge mode by referring to discharge mode information that associates a closed circuit voltage generated by use of a discharge pattern of the battery with a state of charge in the battery by use of the measured closed circuit voltage.

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Title :

State-of-charge estimation device and state-of-charge estimation method

Contributors:

NISHIGAKI KENJI (author) / KIDONO MASASHI (author) / TSUZUKU TAKAHIRO (author) / NOMURA HIROYUKI (author)

Publication date :

2019-11-05

Type of media :

Patent

Type of material :

Electronic Resource

Language :

English

Classification :

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