Title:
LEARNING METHOD, STATE ESTIMATION METHOD, AND STATE ESTIMATION DEVICE FOR STATE ESTIMATION MODEL OF SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2022136662
Kind Code:
A
Abstract:
To accurately estimate the state (charge rate and deterioration degree) of an operating secondary battery with various electrical characteristics.SOLUTION: A learning method includes the steps of: measuring state variables including terminal currents and terminal voltages of a secondary battery at predetermined time intervals; calculating state estimation input data by preprocessing the state variables; and training a state estimation model to learn a relationship of the state estimation input data with a charge rate and/or a deterioration degree of the secondary battery by machine learning. The step of calculating the state estimation input data includes calculating a difference gradient which is a change rate of voltage differences in the terminal voltages with respect to current differences in the terminal currents and generating the state estimation input data including time-series data of difference gradients.SELECTED DRAWING: Figure 3
Inventors:
UOSHIMA MINORU
Application Number:
JP2021036376A
Publication Date:
September 21, 2022
Filing Date:
March 08, 2021
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
G01R31/367; G01R31/3828; G01R31/3835; G01R31/387; G01R31/389; G01R31/392; H01M10/42; H01M10/48; H02J7/00
Attorney, Agent or Firm:
Kushibuchi International Patent Office
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