A method of estimating a state of charge of a secondary battery, a system for estimating a state of charge of a secondary battery, and a method of detecting anomaly of a secondary battery

摘要

A method of estimating the state of charge of a secondary battery which has high estimation accuracy even as the secondary battery deteriorates is provided. Furthermore, there is provided a system for measuring the capacity of a secondary battery in which SOC is estimated with high accuracy in a short time at a low cost. If the capacity of a secondary battery can be estimated with high accuracy, anomaly detection can also be performed based on the value. A novel method of abnormality detection of a secondary battery is provided. In the charging method of the CCCV charge, the CC time and the CV time are used as learning parameters to build a learning model. Using this learning model, an estimated capacity value can be obtained with high accuracy by taking two data, namely the CC time and the CV time, or three data, namely the CC time, the CV time and the charging start voltage value, as the minimum number used by input data.