Degradation state estimating method and degradation state estimating apparatus

摘要

Provided is a degradation state estimating method which decreases degradation in a secondary battery caused by estimating the degradation state. The degradation state estimating method is a method of estimating the degradation state of a secondary battery, includes:
controlling application of current to the secondary battery; obtaining, as measurement information, at least a voltage value of the secondary battery measured while the current is flowing through the secondary battery; and estimating the degradation state of the secondary battery, based on a model for estimating the degradation state of the secondary battery and the measurement information obtained in the obtaining. In the controlling, at least one of a current value of the current and duration during which a predetermined current value is maintained is determined according to a provisional degradation state of the secondary battery.

主权项

1. A degradation state estimating method of estimating a degradation state of a secondary battery, the degradation state estimating method comprising:
controlling application of a current to the secondary battery; obtaining, as measurement information, at least a voltage value of the secondary battery measured while the current is flowing through the secondary battery; estimating the degradation state of the secondary battery, based on a model for estimating the degradation state of the secondary battery and the measurement information obtained in the obtaining, and obtaining degradation information which is information indicating a provisional degradation state of the secondary battery, wherein, in the controlling, as degradation of the secondary battery indicated by the degradation information progresses, a second control for increasing a length of duration during which the current to be applied to the secondary battery is maintained at a predetermined current value is performed.