Method, apparatus and recording medium for estimating parameters of battery equivalent circuit model
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United States of America Patent
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Sep 14, 2021
Grant Date -
Jun 3, 2021
app pub date -
Nov 10, 2018
filing date -
Nov 2, 2017
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Abstract
Disclosed is a method and apparatus for estimating parameters of a battery equivalent circuit model. The battery equivalent circuit model includes a first and second resistors and a capacitor. The method includes reading a pulse discharge profile corresponding to a parameter estimation condition from a plurality of pre-stored pulse discharge profiles, the pulse discharge profile including a first number of terminal voltages sequentially measured from a battery having a specific SOC in a predetermined cycle while the battery is discharged with a specific constant current from an OCV corresponding to the specific SOC to a lower limit of discharge voltage at a specific temperature, extracting a second number of terminal voltages between the OCV and a threshold voltage from the first number of terminal voltages, and estimating resistance values of the first and second resistors based on the OCV, the constant current, and the second number of terminal voltages.
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