FULL CHARGE CAPACITY ESTIMATION DEVICE AND METHOD
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United States of America Patent
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Issued Date -
Oct 24, 2024
app pub date -
Jan 9, 2024
filing date -
Jan 9, 2024
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Abstract
This device estimates the full charge capacity of a redundant system battery that supplies electric power to a redundant vehicle load, and includes an acquisition unit that acquires battery voltage, a determination unit that determines whether the polarization of the battery has been resolved after the ignition switch of the vehicle is turned off, a measurement unit that measures, when it is determined that the polarization has been resolved, the time from the time of determination until the voltage of the battery decreases to a first threshold due to dark current consumption, and a calculation unit that calculates, when the measurement time is greater than or equal to a second threshold, the battery state of charge based on the SOC-OCV characteristic curve before deterioration, and calculates, when the measurement time is less than the second threshold, the battery state of charge based on the SOC-OCV characteristic curve after deterioration.
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