Management Method and Management System of Secondary Battery

Abstract

The present disclosure provides a management method and a management system of a secondary battery, the secondary battery comprises N battery cells connected in series, N being a positive integer greater than or equal to 2. The management method comprises: acquiring a voltage and a battery capacity parameter of both ends of the secondary battery in real time during at least one process of a charging process and a discharging process; determining a characteristic point of the voltage during its changing process, comprising: calculating a ratio of a change of the voltage relative to a change of the battery capacity parameter in real time when the voltage reaches a preset range, and determining that one characteristic point occurs during the changing process of the voltage when the ratio is greater than a characteristic threshold; and determining a uniformity of the secondary battery based on a number of the characteristic points. The management method and the management system of the present disclosure reduce the number of sampling lines, do not rely on the use of AFE chip, have strong practicality, and reduce the cost of the product.

Dependencies are inferred from the claim text.