Battery management system, battery management method, and method of manufacturing battery assembly

A battery management method comprising:

• obtaining a prescribed closed circuit voltage (CCV) waveform of a target battery that is a prescribed secondary battery;
• generating input data for a trained model from the prescribed CCV waveform;
• and
• inputting the input data to the trained model;
• and
• estimating, by the trained model, a full charge capacity of the target battery,
• the input data representing the prescribed CCV waveform of the target battery,
• the prescribed CCV waveform being any one of a CCV charging waveform and a CCV discharging waveform, the CCV charging waveform representing transition of a CCV during constant-current charging of the target battery, the CCV discharging waveform representing transition of a CCV during constant-current discharging of the target battery.

A method of manufacturing a battery assembly, the method comprising:

• obtaining a prescribed closed circuit voltage (CCV) waveform of a target battery that is a prescribed secondary battery;
• generating input data for a trained model from the prescribed CCV waveform;
• inputting the input data to the trained model;
• estimating, by the trained model, a full charge capacity of the target battery;
• and
• manufacturing a battery assembly from a plurality of secondary batteries of which full charge capacity has been estimated by the trained model,
• the input data representing the prescribed CCV waveform of the target battery, and
• the prescribed CCV waveform being any one of a CCV charging waveform and a CCV discharging waveform, the CCV charging waveform representing transition of a CCV during constant-current charging of the target battery, the CCV discharging waveform representing transition of a CCV during constant-current discharging of the target battery.