Secondary battery system and SOC estimation method for secondary battery

An ECU is configured to execute SOC estimation control for estimating an SOC of a battery. The ECU obtains "first voltage" indicating an OCV of the battery in the SOC estimation control. The ECU controls an engine and a PCU such that the battery is charged with an amount of electric power...

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Bibliographic Details
Main Authors Nagai, Hiroki, Nishigaki, Mina, Nishide, Daisuke, Koga, Tatsuya, Tokunaga, Ryushiro
Format Patent
LanguageEnglish
Published 25.04.2023
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TESTING
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Summary:An ECU is configured to execute SOC estimation control for estimating an SOC of a battery. The ECU obtains "first voltage" indicating an OCV of the battery in the SOC estimation control. The ECU controls an engine and a PCU such that the battery is charged with an amount of electric power equal to or larger than a prescribed amount, when the first voltage is within a voltage range where hysteresis occurs. The ECU obtains "second voltage" indicating an OCV of the charged battery, and estimates the SOC of the battery from the second voltage.
Bibliography:Application Number: US201916560430