A welding quality defect detection apparatus

Abstract

This invention provides a welding quality defect detection device, specifically relating to the field of mechanical automation technology. It includes a detection unit, a frame, a loading / unloading unit, a conveying unit, a welding unit, and an unloading platform. The detection unit comprises a U-shaped bracket, a first Y-axis module, a Z-axis module, and a vision unit. The vision unit is equipped with a CCD camera, a rectangular white light source, a ring-shaped white light source, and an image processing unit, possessing feature recognition and positioning accuracy of 0.045mm pixels and a field of view of 109.52mm × 91.03mm, enabling precise capture of welding defects. The loading / unloading unit automatically picks up and transports solar cells. The conveying unit integrates a welding module and a defective product module, realizing the conveying of solar cells and the separation of good and defective products. This equipment integrates automated loading / unloading, welding, defect detection, and separation functions, and is suitable for batch visual inspection scenarios in solar cell production and processing.

Description

Technical Field

[0001] This invention provides a welding quality defect detection device, specifically relating to the field of mechanical automation technology. Background Technology

[0002] In core industries such as photovoltaic energy and electronics manufacturing, solar cells, as key components of end products, directly determine the photoelectric conversion efficiency, structural stability, and lifespan of the products through their welding quality, making them a crucial link affecting the quality of industrial development. With the continuous iteration of industry technology and the market's increasing demands for product precision, defect detection in the solar cell welding process has become a key support for ensuring the quality of large-scale production and enhancing industrial competitiveness. Existing detection methods suffer from problems such as excessive manual intervention, low precision, poor equipment integration, and insufficient light source compatibility, making it difficult to meet the needs of high-precision batch testing in industrial applications. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a welding quality defect detection device, which can effectively solve the related technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A welding quality defect detection device, comprising: The detection unit consists of a U-shaped bracket, a first Y-axis module, a Z-axis module, and a vision unit. The U-shaped bracket is fixedly installed on the platform of the machine frame; The first Y-axis module is installed on the side of the crossbeam at the top of the U-shaped bracket; The Z-axis module is arranged vertically, slides with the first Y-axis module, and is mounted on the first Y-axis module; The vision unit is fixedly connected to the Z-axis module.

[0006] Furthermore, the vision unit includes a camera mount, a camera, a lens, a rectangular white light source mounting block, a rectangular white light source, an L-shaped bracket, a ring-shaped white light source, and an image processing unit; The camera mounting base, the rectangular white light source mounting block, and the L-shaped bracket are fixed from top to bottom to the vertical moving end of the Z-axis module, and each is provided with a first U-shaped groove, a second U-shaped groove, and a third U-shaped groove extending along the Z-axis. The CCD camera and lens are sequentially mounted on the camera mount; The rectangular white light source and the ring-shaped white light source are respectively mounted on the rectangular white light source fixing block and the L-shaped bracket; The image processing unit has feature recognition and positioning capabilities with a pixel accuracy of 0.045mm and a field of view of 109.52mm × 91.03mm.

[0007] Furthermore, the camera employs a CCD charge-coupled device image sensor with a resolution of 2448×2048.

[0008] Furthermore, the frame is made of stainless steel.

[0009] Furthermore, a welding quality defect detection device also includes: The loading and unloading unit is located on the platform of the frame and includes two X-axis modules and one second Y-axis module; The two X-axis modules are ball screw modules, which are symmetrically fixed on both sides of the frame. Each X-axis module is provided with a guide rail extending along its length. The two ends of the second Y-axis module are respectively adapted to the guide rails of the two X-axis modules via sliders, and are horizontally mounted above the two X-axis modules; The second Y-axis module is equipped with a loading robot.

[0010] Furthermore, a welding quality defect detection device also includes: The conveying unit is disposed on the platform of the frame and includes two X-direction welding modules and one X-direction defective product module arranged adjacent to each other in sequence, and the X-direction defective product module is located downstream of the two X-direction welding modules. The X-axis welding module is equipped with a welding fixture, and the X-axis defective product module is equipped with a defective product placement platform.

[0011] Furthermore, a welding quality defect detection device also includes: The welding unit includes a welding head and an adjustment component, which are fixed on the platform of the frame and are set up with a welding station corresponding to the X-axis welding module.

[0012] Furthermore, a welding quality defect detection device also includes: The unloading platform is located on one side of the frame and is fixedly connected to the frame.

[0013] Furthermore, the equipment picks up battery cells through the loading and unloading unit and alternately places them on the welding fixtures of two X-axis welding modules; the two X-axis welding modules slide sequentially to the welding station, where the welding unit alternately completes the welding operation; after a single X-axis welding module is welded, it slides to the inspection station, where it is inspected by the inspection unit. The loading robot then transports the qualified battery cells from the module to the unloading table and the unqualified battery cells to the X-axis defective product module, while the other X-axis welding module simultaneously enters the welding station; finally, the X-axis defective product module completes the centralized diversion and output of defective products.

[0014] Compared with the known prior art, the technical solution provided by this invention has the following beneficial effects: Firstly, the detection accuracy is greatly improved, and the defect identification is more precise: The vision unit adopts a high-resolution CCD charge-coupled device camera, and is equipped with a dual white light illumination design of rectangular white light source and ring white light source, which can effectively avoid problems such as light reflection and shadow occlusion, and ensure the clarity and uniformity of image acquisition. Combined with the image processing unit with a recognition capability of 0.045mm pixel accuracy and a large field of view of 109.52mm×91.03mm, it can not only accurately capture tiny welding defects, but also achieve full coverage detection of complete battery cells without multiple image stitching, greatly reducing the risk of missed detection and misjudgment, and meeting the needs of high-precision detection.

[0015] Secondly, the equipment boasts a high degree of integration and significantly optimized operational efficiency: It integrates a testing unit, loading and unloading unit, conveying unit, welding unit, and unloading platform into one unit, forming a closed-loop operation process of automatic picking, welding, testing, sorting, and unloading. This solves the problem of independent operation and poor connection between processes in existing equipment, shortens material transfer time, and improves process connection efficiency. At the same time, the conveying unit adopts a design of parallel and alternating operation of dual X-axis welding modules, which, together with the X-axis module and the second Y-axis module of the loading and unloading unit, coordinate to transport materials, realize the parallel flow of welding and testing processes, greatly improve the operational efficiency in mass production scenarios, and adapt to the pace of large-scale industrial production.

[0016] Thirdly, the structural design is robust and reliable, extending its service life: the frame is made of stainless steel, possessing excellent structural strength and wear resistance, effectively improving the overall stability of the equipment; the camera, rectangular white light source, and ring white light source of the vision unit are all installed through a fixed base or bracket with a U-shaped slot, and the installation position can be flexibly adjusted along the Z-axis to adapt to the detection needs of different specifications of battery cells, and the connection is firm and the adjustment is convenient, further ensuring the long-term reliability and service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural diagram of a welding quality defect detection device proposed in this invention; Figure 2 This is an assembly diagram of the detection unit of a welding quality defect detection device proposed in this invention; Figure 3 This is a detailed drawing of the vision system for a welding quality defect detection device proposed in this invention; Figure 4 This is a schematic diagram of the frame of a welding quality defect detection device proposed in this invention; Figure 5 This is an assembly diagram of the loading and unloading unit of a welding quality defect detection device proposed in this invention; Figure 6 This is a schematic diagram of the conveying unit of a welding quality defect detection device proposed in this invention; Figure 7 This is an assembly diagram of a welding unit for a welding quality defect detection device proposed in this invention; Figure 8 This is an assembly diagram of the unloading platform for a welding quality defect detection device proposed in this invention.

[0018] The labels in the diagram represent: 1-Detection unit, 11-U-shaped bracket, 12-First Y-axis module, 13-Z-axis module, 14-Vision unit, 141-Camera mounting base, 1411-First U-shaped slot, 142-Camera, 143-Lens, 144-Rectangular white light source mounting block, 1441-Second U-shaped slot, 145-Rectangular white light source, 146-L-shaped bracket, 1461-Third U-shaped slot, 147-Annular white light source, 148-Image processing unit, 2-Frame, 3-Loading and unloading unit, 31-X-axis module, 32-Second Y-axis module, 321-Loading robot, 4-Conveying unit, 41-X-direction welding module, 411-Welding fixture, 42-X-direction defective product module, 421-Defective product placement platform, 5-Welding unit, 6-Unloading platform. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments.

[0020] Currently, there are still many technical drawbacks in the field of solar cell welding quality inspection: First, traditional manual visual inspection is labor-intensive, inefficient, and easily affected by subjective factors, resulting in poor consistency and a high rate of missed or misjudged minor defects; Second, the vision components of existing automated inspection equipment have low resolution and limited image processing capabilities, making it difficult to identify minute defects smaller than 0.1mm, and the narrow field of view requires multiple stitching inspections, resulting in low efficiency; Third, the equipment structure lacks integration and coordination, with each process operating independently, resulting in long material transfer times, and the unreasonable selection of materials for the frame and core components limits stability and service life; Fourth, the light source configuration is limited, and reflections and shadows easily affect the image acquisition quality, reducing the accuracy of defect detection.

[0021] To overcome the aforementioned drawbacks, the present invention employs the following embodiments to address the current situation.

[0022] Example 1: Reference Appendix Figure 1 This is a front-view three-dimensional structural diagram of a welding quality defect detection device, which includes a detection unit 1, a frame 2, a loading and unloading unit 3, a conveying unit 4, a welding unit 5, and a loading platform 6.

[0023] In this example, inspection unit 1 is used for visual inspection of welding quality defects in solar cells. All units are installed on the frame 2 as a unified reference, forming a compact and collaborative overall structural layout. Inspection unit 1, located in the upper middle part of the frame 2 platform, is the core defect visual inspection module. Loading and unloading unit 3 is located on one side of the frame 2 platform, responsible for the automatic picking and handling of solar cells. Conveying unit 4 is located in the middle of the frame 2 platform, realizing the transfer and sorting of good and bad solar cells. Welding unit 5 is set up at the welding station corresponding to conveying unit 4 to complete the welding of solar cells. Unloading platform 6 is fixed to the outside of frame 2, providing an output carrier for qualified solar cells. The collaborative operation of all units forms an automated closed loop, effectively reducing manual intervention and improving the overall efficiency of visual inspection and welding.

[0024] like Figure 2 As shown, in another embodiment, a welding quality defect detection device includes: The detection unit 1 consists of a U-shaped bracket 11, a first Y-axis module 12, a Z-axis module 13, and a vision unit 14. The U-shaped bracket 11 is fixedly installed on the platform of the frame 2; The first Y-axis module 12 is installed on the side of the crossbeam at the top of the U-shaped bracket 11; The Z-axis module 13 is arranged vertically, slides with the first Y-axis module 12, and is mounted on the first Y-axis module 12; The vision unit 14 is fixedly connected to the Z-axis module 13.

[0025] The composition of detection unit 1 and the installation positions of its components are described. Its core design lies in achieving two-dimensional position adjustment of detection unit 1 through the sliding cooperation of the modules. A U-shaped bracket 11 serves as the supporting foundation for detection unit 1, fixedly installed on the platform of the frame 2, providing a stable mounting carrier for the first Y-axis module 12. The first Y-axis module 12 is horizontally installed on the side of the crossbeam at the top of the U-shaped bracket 11, providing guidance for the Y-axis movement of the Z-axis module 13. The Z-axis module 13 is vertically arranged and slides with the first Y-axis module 12, allowing for linear Y-axis movement along the first Y-axis module 12. The vision unit 14 is fixed to the moving end of the Z-axis module 13 and can move up and down in the Z-axis direction along with the Z-axis module 13. This structural design gives the vision unit 14 two-dimensional position adjustment freedom in the Y and Z directions, allowing for flexible adjustment of the detection height and horizontal position to adapt to the detection position requirements of different specifications of battery cells. Simultaneously, the sliding cooperation of each module ensures the accuracy and smoothness of position adjustment.

[0026] like Figure 3 As shown, in one embodiment, the vision unit 14 includes a camera mount 141, a camera 142, a lens 143, a rectangular white light source mounting block 144, a rectangular white light source 145, an L-shaped bracket 146, a ring-shaped white light source 147, and an image processing unit 148. The camera mounting base 141, the rectangular white light source mounting block 144, and the L-shaped bracket 146 are fixed from top to bottom to the vertical moving end of the Z-axis module 13, and each is provided with a first U-shaped groove 1411, a second U-shaped groove 1441, and a third U-shaped groove 1461 extending along the Z-axis. The CCD camera 142 and lens 143 are sequentially mounted on the camera mount 141; The rectangular white light source 145 and the annular white light source 147 are respectively mounted on the rectangular white light source fixing block 144 and the L-shaped bracket 146; The image processing unit 148 has feature recognition and positioning capabilities with a pixel accuracy of 0.045mm and a field of view of 109.52mm × 91.03mm.

[0027] The structure and function design of the vision unit are clearly defined; all components are installed based on the Z-axis module 13, arranged from top to bottom as camera mount 141, rectangular white light source mounting block 144, and L-shaped bracket 146, ensuring coaxiality and coordination between image acquisition and light source illumination. The groove widths of the first U-shaped slot 1411, second U-shaped slot 1441, and third U-shaped slot 1461 are specifically designed to match fastener specifications, allowing for fine-tuning of the Z-axis position of the camera and light source by tightening or loosening the fasteners, with adjustment precision adapted to the detection requirements of the battery cells.

[0028] The CCD camera 142 features a high resolution of 2448×2048. Its pixel size, combined with the 0.045mm pixel precision and 109.52mm×91.03mm field of view of the image processing unit 148, forms a precise technical synergy, providing a sufficient pixel base for the identification of minute defects. This ensures that even with full coverage of the large field of view, it can still clearly capture the minute features of the weld, avoiding the loss of defect detection due to insufficient resolution.

[0029] The design employs a dual-light source system consisting of a rectangular white light source 145 and a ring-shaped white light source 147. The rectangular white light source 145 provides uniform surface illumination to the welding surface of the battery cells, eliminating uneven brightness on the welding surface. The ring-shaped white light source 147 provides ring-shaped contour illumination to the welding edge, highlighting the defect boundary. The dual light sources work together to effectively solve the problems of reflection and shadow occlusion that are prone to occur with a single light source, ensuring the clarity and uniformity of image acquisition.

[0030] The image processing unit 148 has a pixel accuracy of 0.045mm, which enables it to accurately identify and locate micro-defects at the weld joints of the solar cells. Its large field of view of 109.52mm × 91.03mm allows a single frame image to cover the entire solar cell without the need for multiple image stitching, which improves both detection accuracy and detection efficiency.

[0031] In one embodiment, the camera 142 employs a CCD charge-coupled device image sensor with a resolution of 2448×2048.

[0032] CCD sensors have advantages such as low noise, wide dynamic range, and strong image stability, making them particularly suitable for high-precision defect detection scenarios. From the hardware selection perspective, they ensure the clarity and reliability of image acquisition.

[0033] The camera 142 has a resolution of 2448×2048, which works in conjunction with the minimum pixel accuracy of 0.045mm and the field of view of 109.52mm×91.03mm of the image processing unit in claim 2. This high resolution provides the pixel basis for accurate identification of minute defects, ensuring clear capture of minute features even within a large field of view, and avoiding missed defects due to insufficient resolution.

[0034] like Figure 4 As shown, in one embodiment, the frame 2 is made of stainless steel.

[0035] The frame 2 is made of stainless steel, which is corrosion-resistant and wear-resistant, making it suitable for industrial production environments such as photovoltaic energy and electronic manufacturing. This reduces the incidence of equipment failures caused by corrosion and deformation, extends the overall service life of the equipment, and reduces the equipment maintenance and replacement costs for enterprises, meeting the core requirements of high stability and low maintenance costs for industrial mass production.

[0036] like Figure 5 As shown, in one embodiment, a welding quality defect detection device further includes: The loading and unloading unit 3 is located on the platform of the frame 2 and includes two X-axis modules 31 and a second Y-axis module 32. The two X-axis modules 31 are ball screw modules, which are symmetrically fixed on both sides of the frame 2. Each X-axis module 31 is provided with a guide rail extending along its length. The two ends of the second Y-axis module 32 are respectively adapted to the guide rails of the two X-axis modules 31 via sliders, and are horizontally mounted above the two X-axis modules 31; The second Y-axis module 32 is equipped with a loading robot 321.

[0037] Two X-axis modules 31 are symmetrically fixed on both sides of the frame 2, providing a stable lateral support foundation for the second Y-axis module 32. The second Y-axis module 32 is vertically mounted above the two X-axis modules and slidably connected, forming a two-dimensional motion mechanism of lateral movement of the X-axis and longitudinal movement of the second Y-axis. This ensures that the loading robot 321 can cover the entire working platform of the frame stably and reliably, achieving precise picking and handling of battery cells. By clearly defining the installation position of the loading robot 321 and locking the core execution components, the support, movement, and execution structure logic of the loading and unloading unit 3 is closed, ensuring the feasibility of automated handling.

[0038] like Figure 6 As shown, in one embodiment, a welding quality defect detection device further includes: The conveying unit 4 is disposed on the platform of the frame 2 and includes two X-direction welding modules 41 and one X-direction defective product module 42 arranged adjacent to each other in sequence, and the X-direction defective product module 42 is located downstream of the two X-direction welding modules 41. The X-direction welding module 41 is provided with a welding fixture 411, and the X-direction defective product module 42 is provided with a defective product placement platform 421.

[0039] Two X-axis welding modules 41 and one X-axis defective product module 42 are arranged adjacent to each other in sequence, forming a layout chain for welding support, inspection flow, and defective product diversion. This ensures a smooth transfer path for the battery cells from the welding station to the inspection station and then to the diversion stage, reducing the material movement distance. The core component of the X-axis welding module 41 is the welding fixture 411, which is used to accurately position and fix the battery cells, ensuring the stability and welding accuracy of the welding process. The core component of the X-axis defective product module 42 is the defective product placement table 421, which is used to centrally collect unqualified products, realizing the physical separation of qualified and unqualified products and avoiding the risk of mixing materials.

[0040] The X-axis sliding design enables precise transfer of battery cells between different workstations. It works with the loading and unloading unit 3 to pick up and place battery cells, with the welding unit 5 to achieve precise docking at the welding station, and with the inspection unit 1 to locate materials at the inspection station. At the same time, it achieves diversion through the defective product module, solving the problem of disconnection between units in existing equipment and significantly improving overall operation efficiency.

[0041] The two X-axis welding modules are arranged in parallel, which can realize the parallel operation mode of alternating welding and inspection, avoid the process waiting caused by a single welding module, and further improve the equipment capacity in mass production scenarios. This is different from the inefficient design of existing single welding modules and enhances the industrial production adaptability of the equipment.

[0042] like Figure 7 As shown, in one embodiment, a welding quality defect detection device further includes: Welding unit 5, which includes a welding head and an adjustment assembly, is fixed on the platform of the frame 2 and is set at the welding station of the X-axis welding module 41.

[0043] The fixed installation design, which is precisely aligned with the welding station, ensures that the movement trajectories of the welding unit 5 and the conveying unit 4 are accurately matched. When the X-axis welding module 41 carries the battery cell to the welding station, the welding unit 5 can directly perform welding operations on the battery cell fixed on the welding fixture 411, avoiding problems such as welding offset and incomplete welding caused by installation position deviation, and ensuring welding quality. At the same time, this installation method enables the welding unit to form a stable connection with the frame, sharing the same installation reference with the loading / unloading unit 3 and the inspection unit 1, and strengthening the coordination of each unit.

[0044] like Figure 8 As shown, in one embodiment, a welding quality defect detection device further includes: The unloading platform 6 is located on one side of the frame 2 and is fixedly connected to the frame 2.

[0045] The unloading platform 6 provides a dedicated storage and output carrier for qualified solar cells, facilitating the transfer of qualified products to the next process. Through its fixed installation and side-mounted layout, the unloading platform 6, conveying unit 4, and loading / unloading unit 3 form a rational spatial coordination. After inspection, the loading robot 321 can quickly transport qualified solar cells from the conveying unit to the unloading platform 6 without additional adjustments to its movement trajectory, shortening material transfer distance and improving overall operational efficiency. Simultaneously, the unloading platform 6 is fixedly connected to the frame 2, ensuring it shares the same installation reference with other units and preventing material spillage or storage chaos caused by the displacement of the unloading platform 6.

[0046] In one embodiment, the device picks up battery cells through the loading and unloading unit 3 and alternately places them on the welding fixtures 411 of two X-axis welding modules 41. The two X-axis welding modules 41 slide sequentially to the welding station, where the welding unit 5 alternately completes the welding operation. After welding is completed, a single X-axis welding module 41 slides to the inspection station and is inspected by the inspection unit 1. The loading robot 321 then transports the qualified battery cells from the module to the unloading table 6 and the unqualified battery cells to the X-axis defective product module 42. At the same time, the other X-axis welding module 41 enters the welding station. Finally, the X-axis defective product module 42 completes the centralized diversion and output of the defective products.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding quality defect detection device, characterized in that, include: The detection unit (1) consists of a U-shaped bracket (11), a first Y-axis module (12), a Z-axis module (13), and a vision unit (14); The U-shaped bracket (11) is fixedly installed on the platform of the frame (2); The first Y-axis module (12) is installed on the side of the crossbeam at the top of the U-shaped bracket (11); The Z-axis module (13) is arranged vertically, slides with the first Y-axis module (12), and is mounted on the first Y-axis module (12); The vision unit (14) is fixedly connected to the Z-axis module (13).

2. The welding quality defect detection equipment according to claim 1, characterized in that, The vision unit (14) includes a camera mount (141), a camera (142), a lens (143), a rectangular white light source mounting block (144), a rectangular white light source (145), an L-shaped bracket (146), a ring white light source (147), and an image processing unit (148). The camera mounting base (141), the rectangular white light source mounting block (144), and the L-shaped bracket (146) are fixed from top to bottom to the vertical moving end of the Z-axis module (13), and each is provided with a first U-shaped slot (1411), a second U-shaped slot (1441), and a third U-shaped slot (1461) extending along the Z-axis. The camera (142) and lens (143) are mounted sequentially on the camera mount (141). The rectangular white light source (145) and the ring white light source (147) are respectively mounted on the rectangular white light source fixing block (144) and the L-shaped bracket (146). The image processing unit (148) has the capability of feature recognition and positioning with a pixel accuracy of 0.045 mm and a field of view of 109.52 mm × 91.03 mm.

3. The welding quality defect detection equipment according to claim 2, characterized in that, The camera (142) uses a CCD charge-coupled device image sensor with a resolution of 2448×2048.

4. The welding quality defect detection equipment according to claim 1, characterized in that, The frame (2) is made of stainless steel.

5. The welding quality defect detection equipment according to claim 1, characterized in that, Also includes: The loading and unloading unit (3) is located on the platform of the frame (2) and includes two X-axis modules (31) and a second Y-axis module (32). The two X-axis modules (31) are ball screw modules, which are symmetrically fixed on both sides of the frame (2). Each X-axis module (31) is provided with a guide rail extending along its length. The two ends of the second Y-axis module (32) are respectively adapted to the guide rails of the two X-axis modules (31) through sliders, and are horizontally mounted above the two X-axis modules (31); The second Y-axis module (32) is equipped with a loading robot (321).

6. The welding quality defect detection equipment according to claim 1, characterized in that, Also includes: The conveying unit (4) is disposed on the platform of the frame (2) and includes two X-direction welding modules (41) and one X-direction defective product module (42) arranged adjacent to each other in sequence, and the X-direction defective product module (42) is located downstream of the two X-direction welding modules (41); The X-direction welding module (41) is provided with a welding fixture (411), and the X-direction defective product module (42) is provided with a defective product placement platform (421).

7. The welding quality defect detection equipment according to claim 1, characterized in that, Also includes: Welding unit (5), which includes a welding head and an adjustment component, is fixed on the platform of the frame (2) and is set at the welding station of the X-axis welding module (41).

8. The welding quality defect detection equipment according to claim 1, characterized in that... It also includes: The unloading platform (6) is located on one side of the frame (2) and is fixedly connected to the frame (2).

9. A welding quality defect detection device according to any one of claims 1 to 8, characterized in that... The equipment picks up the battery cells through the loading and unloading unit (3) and alternately places them on the welding fixture (411) of the two X-axis welding modules (41). The two X-axis welding modules (41) slide to the welding station in sequence, and the welding unit (5) alternately completes the welding operation. After the welding of a single X-axis welding module (41) is completed, it slides to the inspection station and is inspected by the inspection unit (1). The loading robot (321) transports the qualified battery cells on the module to the unloading table (6) and the unqualified battery cells to the X-axis defective product module (42). At the same time, the other X-axis welding module (41) enters the welding station simultaneously. Finally, the X-axis defective product module (42) completes the centralized diversion and output of the unqualified products.

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