Detection method, system and device, computer equipment and readable storage medium

The invention discloses a detection method, system and device, computer equipment and a readable storage medium, belongs to the technical field of battery detection, and is used for detecting welding defects of a secondary battery top cover, and the detection method comprises the following steps: obtaining a two-dimensional image and a depth image of a welding part in the secondary battery top cover; in the two-dimensional image, acquiring a first bonding wire area corresponding to the welding part, and detecting a first defect in the first bonding wire area; the first defect is configured to represent a welding black defect, and the welding black defect is obtained based on screening of the first bonding wire area; according to a pre-acquired image mapping relation, acquiring a second bonding wire area, mapped in the depth image, of the first bonding wire area, and detecting a second defect in the second bonding wire area; the second defect is configured to represent a weld penetration defect and/or a blasti