A capacity fading analysis method, device, electronic equipment and storage medium

Abstract

The present application provides a capacity decay analysis method, device, electronic device and storage medium. The method includes: acquiring a differential capacitance-voltage curve corresponding to each charge-discharge process of a battery to be analyzed during a preset number of cyclic charge-discharge processes; The change curvature of the differential capacitance-voltage curve divides the corresponding differential capacitance-voltage curve into intervals, wherein each interval corresponds to an electrochemical reaction stage; compare the curve change amplitudes of multiple differential capacitance-voltage curves in the same electrochemical reaction stage to select The target electrochemical reaction stage that satisfies the preset conditions is determined; the electrochemical reaction material of the target electrochemical reaction stage is confirmed as the target factor affecting the capacity decay of the battery to be analyzed. In the embodiment of the present application, the factors affecting the capacity attenuation of the battery are determined according to the variation range of the differential capacitance-voltage curve, which provides a more accurate basis for the theoretical design of battery materials with long cycle life.

Description

technical field [0001] The present application relates to the field of battery analysis, in particular, to a capacity fading analysis method, device, electronic equipment and storage medium. Background technique [0002] Secondary batteries, also known as rechargeable batteries, have the characteristics of being rechargeable and rechargeable and can be used many times compared to primary batteries. The reversible capacity of the secondary battery will show a stable or decreasing state with the increase of the number of uses, and there are many factors that cause the life of the secondary battery to decay. In order to improve the service life of secondary battery materials, it is urgent to track the changes in electrochemical properties caused by the internal structure changes of electrode materials during the cycle of secondary batteries in real time, so as to analyze the factors that affect the cycle life of secondary batteries. Determinants provide a basis for theoretical...

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Problems solved by technology

[0004] The purpose of the embodiments of the present application is to provide a capacity fading analysis method, device, electronic equipment, and storage medium to improve the problem that traditional battery analysis methods are prone to errors and cause inaccurate analysis.

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