Secondary battery state estimation system, secondary battery state estimation method, and program

A secondary battery state estimation method performed by an electronic apparatus including a process portion that estimates an open circuit voltage or an overvoltage of a secondary battery to be estimated, the method including:

• a model acquisition step of acquiring a learning model that acquires first data having data in a time series of a current, a closed circuit voltage, and an open circuit voltage of a secondary battery in a predetermined state including at least one of charging and discharging and that outputs an open circuit voltage or an overvoltage which is a difference between the open circuit voltage and a closed circuit voltage of the secondary battery at an arbitrary time based on the first data;
• and
• a voltage estimation step of inputting second data having data of a current and a closed circuit voltage at a predetermined time detected in the secondary battery to be estimated to the learning model acquired by the model acquisition step and thereby estimating an open circuit voltage or an overvoltage of the secondary battery to be estimated at an arbitrary time.

A computer-readable non-transitory recording medium that records a program causing a computer of an electronic apparatus including a process portion that estimates an open circuit voltage or an overvoltage of a secondary battery to be estimated to execute:

• a model acquisition step of acquiring a learning model that acquires first data having data in a time series of a current, a closed circuit voltage, and an open circuit voltage of a secondary battery in a predetermined state including at least one of charging and discharging and that outputs an open circuit voltage or an overvoltage which is a difference between the open circuit voltage and a closed circuit voltage of the secondary battery at an arbitrary time based on the first data;
• and
• a voltage estimation step of inputting second data having data of a current and a closed circuit voltage at a predetermined time detected in the secondary battery to be estimated to the learning model acquired by the model acquisition step and thereby estimating an open circuit voltage or an overvoltage of the secondary battery to be estimated at an arbitrary time.