Lithium battery detection method, apparatus and device, and storage medium

The invention discloses a lithium battery detection method, device and equipment and a storage medium, and the method comprises the steps: collecting a battery capacity sequence of a to-be-detected lithium battery, carrying out the denoising of the battery capacity sequence based on a variational mode decomposition algorithm, obtaining an undisturbed battery capacity sequence, carrying out the calculation of the undisturbed battery capacity sequence through a preset convolution network model, and obtaining the undisturbed battery capacity sequence. Obtaining a category label, obtaining a corresponding capacity degradation sequence according to the category label, combining the capacity degradation sequence and the undisturbed battery capacity sequence to obtain a complete battery capacity sequence, fitting the complete battery capacity sequence to obtain a target fitting regression curve, and performing reverse normalization processing on the target fitting regression curve to obtain a battery capacity degrad