A battery shell visual inspection device

Abstract

The present invention relates to a battery shell visual inspection device, comprising a turntable, four carriers evenly and equidistantly arranged above the turntable near the edge, a 3D camera, a CCD camera, and a concave detection mechanism. The concave detection mechanism is arranged between the front side and the right side of the turntable, and has a detection head that can move up and down and is used to detect the concave of the battery shell surface. When the carrier is rotated to the direction where the detection head is located, the detection head can abut against the surface of the battery shell carried by the carrier at the lowest end of its moving stroke. The present invention uses a 3D camera to detect whether there is a cold weld and welding slag residue in the welding of a battery sealing plate, a CCD camera to detect scratches and surface pollution on the battery surface, and a concave detection mechanism to detect the concave condition of the battery shell surface. When the turntable rotates, multiple streamlined detections of the battery shell are realized, thereby reducing the waiting time between each detection step of a single battery shell.

Description

Technical Field

[0001] The present invention relates to the technical field of battery shell detection devices, and in particular to a battery shell visual detection device. Background Art

[0002] With the popularization of electronic products and the rapid development of the new energy vehicle industry, the demand for energy storage devices such as lithium batteries is growing. In the battery manufacturing process, the quality control of the battery shell is particularly important, because the battery shell not only needs to provide good sealing to prevent electrolyte leakage, but also needs to have sufficient mechanical strength to withstand external pressure. Therefore, how to efficiently and accurately detect the appearance defects of the battery shell has become a key link in the production process.

[0003] Traditional battery shell inspection methods usually rely on manual visual inspection or simple mechanical equipment assistance. This method is inefficient and prone to missed inspections and misjudgments. In recent years, with the development of visual inspection technology and automation technology, the use of machine vision systems for battery shell quality inspection has gradually become a trend. By adopting high-precision cameras (such as 3D cameras, CCD cameras) and advanced image processing algorithms, it is possible to quickly and accurately identify the surface features of the battery shell (such as welding points, scratches, contamination, etc.). However, existing visual inspection devices often have the following shortcomings: (1) The inspection process is scattered: different inspection items require separate workstations, resulting in complex production line layout, large space occupation, long conversion time between single inspection steps, and slow inspection speed; (2) The concave and dented conditions of the battery surface are difficult to effectively and accurately identify through visual inspection mechanisms, which makes it difficult to control the yield rate; (3) During the inspection, the battery shell needs to be rotated to inspect different sides. In the prior art, each carrier needs to be equipped with an independent rotation mechanism, which increases the overall cost of the equipment. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The object of the present invention is to provide a battery shell visual inspection device

[0006] 2. Technical Solution

[0007] The present invention is achieved through the following technical solutions:

[0008] According to a first aspect of the present invention, there is provided a battery shell visual inspection device, comprising:

[0009] Turntable;

[0010] Four carriers are evenly and equidistantly arranged above the turntable near the edge, and the carriers are used to carry the battery shell;

[0011] A 3D camera, the 3D camera is arranged outside the right side of the turntable and facing a carrier;

[0012] A CCD camera, wherein the CCD camera is arranged outside the rear side of the turntable and faces another adjacent stage;

[0013] The dent detection mechanism is arranged between the front side and the right side of the turntable, and has a detection head that can move up and down for detecting the dents on the surface of the battery shell, and when the carrier rotates to the direction of the detection head, the detection head can abut against the surface of the battery shell carried by the carrier at the lowest end of its moving stroke.

[0014] According to an embodiment of the present invention, a steering mechanism is provided on the right side and the rear side below the turntable, and the steering mechanism is used to drive the carrier to rotate along the central axis in the vertical direction; the steering mechanism includes a rotating cylinder and an adjusting block fixed on the turntable of the rotating cylinder; the carrier includes a mounting seat fixedly connected to the surface of the turntable, a connecting seat rotatably connected to the mounting seat, and a supporting block fixedly connected to the top of the connecting seat, and an extension rod is fixed below the connecting seat, and the lower end of the extension rod extends to the bottom of the turntable and can be engaged and connected to the adjusting block so that the connecting seat and the supporting block rotate synchronously with the rotating cylinder.

[0015] An engaging groove is provided on the surface of the adjustment block, and the engaging groove includes a straight section located in the middle, and a gradual entry section symmetrically connected to the two ends of the straight section and gradually widening toward both sides; the two sides of the lower end of the extension rod are symmetrically arranged in a flat plate shape to form a fitting surface, and the extension rod moves from the gradual entry section to the straight section and moves out from the straight section to the gradual entry section on the other side during the rotation of the turntable, and its fitting surface can be tightly attached to the inner two side walls of the straight section.

[0016] A stopper is fixed on one side of the connection seat, and limit blocks are symmetrically arranged on the upper surface of the turntable on both sides of the connection seat, and the limit blocks are used to limit the maximum rotation angle of the stopper to 180°.

[0017] According to an embodiment of the present invention, the detection head includes a substrate, and a number of detection units distributed and connected on the substrate, wherein a single detection unit includes a guide column, a touch plate fixedly connected below the guide column, a top plate fixedly connected above the guide column, and an elastic contact piece fixedly connected to the lower surface of the substrate; wherein a guide hole is opened on the surface of the substrate, the guide column is slidably connected in the guide hole, a spring is sleeved on the guide column, and the two ends of the spring are respectively fixedly connected to the top plate and the upper surface of the substrate; a fixed contact piece is arranged on the upper surface of the touch plate, and the elastic contact piece is located directly above the fixed contact piece, and the fixed contact piece and the elastic contact piece are arranged in a communication circuit connected to a computer, and when the fixed contact piece contacts the elastic contact piece, the computer receives a trigger signal.

[0018] The base plate extends to the outer side above the turntable, and the concave and convex detection mechanism also includes a square column fixedly connected to the base plate on the lower surface of the end portion of the base plate, a vertical guide hole is opened upward through the lower part of the square column, and a vertical guide column is slidably connected in the vertical guide hole, and the lower end of the vertical guide column is fixedly connected to a bottom plate, and the bottom plate and the turntable are fixedly connected to a base, and a compression spring is arranged on the outer sleeve of the vertical guide column, and the two ends of the compression spring are respectively connected to the base and the lower end of the square column; a rotating shaft is fixed on the side of the square column, and the end of the rotating shaft extends to the bottom of the turntable and is rotatably connected to a roller; four pressure blocks are fixedly arranged at equal intervals under the turntable, and the pressure blocks include an inclined section, a horizontal section, and an arc section in sequence in the rotation direction of the pressure blocks moving with the turntable, and the horizontal section is located on the outer side of the bottom of the carrier, and the roller can gradually drive the square column to move downward when contacting the inclined section, and when the roller contacts the horizontal section, the touch plate contacts the surface of the battery shell.

[0019] A through groove is opened on the upper side of the square column along its length direction, and the through groove is connected to the vertical guide hole. Short columns are fixed on both sides of the upper end of the vertical guide column. The short columns extend into the through groove and are slidably connected with the through groove. The through groove limits the maximum displacement of relative sliding between the vertical guide column and the square column.

[0020] According to an embodiment of the present invention, the 3D camera is fixed on a slide seat of a linear module, and the linear module moves along the front-rear direction.

[0021] 3. Beneficial Effects

[0022] One or more of the above embodiments have the following advantages or beneficial effects:

[0023] 1. A battery shell visual inspection device according to an embodiment of the present invention uses a 3D camera to detect whether there are cold welds and welding slag residues in the welding of the battery sealing plate, a CCD camera to detect scratches and surface contamination on the battery surface, and a concave detection mechanism to detect concave conditions on the battery shell surface. During the rotation of the turntable, multiple streamlined inspections of the battery shell are realized, thereby reducing the waiting time between each inspection step for a single battery shell.

[0024] 2. By setting the adjustment block, the rotary cylinder and the carrier are set as a separate and shared structure. Only two steering mechanisms are set under the turntable to rotate the four carriers above it when they turn to the right and rear sides, which reduces the use of rotary cylinders, reduces the overall manufacturing cost, and helps enterprises improve economic benefits.

[0025] 3. By detecting the contact time between the touch panels of multiple different detection units and the battery shell, and performing synchronization detection according to the trigger signal, it is possible to determine whether there is a dent or deflection and quickly analyze the problem based on the abnormal data of the actual trigger signal. This helps to accurately identify the dents on the surface of the battery shell and provide data to support subsequent production process optimization.

[0026] 4. In the present invention, the concave and convex detection mechanism is integrated into the area between the front and rear sides of the turntable instead of occupying an independent platform position, which effectively saves space resources on the work surface and improves the continuity and efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the connection between the steering mechanism and the platform;

[0030] Figure 3 It is a schematic diagram of the structure of the carrier;

[0031] Figure 4 It is a structural diagram of the adjustment block;

[0032] Figure 5 It is a structural schematic diagram of a concave and convex detection mechanism;

[0033] Figure 6 yes Figure 5 A front view of

[0034] 1. Turntable; 2. Carrier; 21. Mounting seat; 22. Connecting seat; 23. Support block; 24. Extension rod; 241. Fitting surface; 25. Stopper; 3. 3D camera; 4. CCD camera; 5. Concave and convex detection mechanism; 51. Detection head; 511. Base plate; 5111. Guide hole; 512. Detection unit; 5121. Guide column; 5122. Touch plate; 5123. Top plate; 5124. Elastic contact sheet; 5125. Spring; 5126. Solid Fixed contact piece; 52, square column; 521, vertical guide hole; 522, through groove; 53, vertical guide column; 54, bottom plate; 55, compression spring; 56, rotating shaft; 57, roller; 58, short column; 6, steering mechanism; 61, rotary cylinder; 62, adjustment block; 621, fitting groove; 6211, straight section; 6212, gradual entry section; 7, limit block; 8, pressure block; 81, inclined section; 82, horizontal section; 83, arc section; 9, linear module. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0036] It should be noted that in the drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. Thus, the size and relative size of each element are not necessarily limited to the size and relative size shown in the drawings. In the specification and drawings, the same or similar reference numerals indicate the same or similar parts.

[0037] When an element is described as being "on" another element, "connected to" another element, or "coupled to" another element, the element may be directly on, directly connected to, or directly coupled to the other element, or there may be intermediate elements. However, when an element is described as being "directly on" another element, "directly connected to" another element, or "directly coupled to" another element, there are no intermediate elements. Other terms and / or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, "between" versus "directly between", "adjacent" versus "directly adjacent", or "on" versus "directly on", etc. In addition, the term "connected" may refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection.

[0038] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present invention.

[0039] For ease of description, spatial relational terms, such as "upper", "lower", "left", "right", etc., may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figure. It should be understood that the spatial relational terms are intended to cover other different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the figure is turned upside down, elements described as "below" or "beneath" other elements or features will be oriented "above" or "above" the other elements or features.

[0040] According to a battery shell visual inspection device of an embodiment of the present invention, please refer to Figure 1-6 , including a turntable 1, four carriers 2 evenly and equidistantly arranged above the turntable 1 near the edge, a 3D camera 3, a CCD camera 4 and a concave detection mechanism 5; in addition, the turntable 1 is provided with a structure connected to a pneumatic rotary joint, the carrier 2 is a vacuum adsorption carrier, the carrier 2 places the battery shell on it by vacuum adsorption, each carrier 2 is respectively connected to a corresponding interface on the pneumatic rotary joint, and is connected in series with the solenoid valve above the pneumatic rotary joint, and the solenoid valve controls whether the vacuum adsorption of the carrier 2 is connected; wherein the pneumatic rotary joint rotates synchronously with the turntable 1 to ensure that the interface position corresponding to each carrier 2 is relatively stationary with it, which can prevent the pipeline from being entangled.

[0041] The 3D camera 3 is arranged on the right side of the turntable 1 and faces a carrier 2. The 3D camera 3 is fixed on the slide of a linear module 9. The linear module 9 moves in the front and rear directions to drive the 3D camera 3 to scan and detect the battery shell sealing plate; the CCD camera 4 is arranged on the rear side of the turntable 1 and faces another adjacent carrier 2; the concave detection mechanism 5 is arranged between the front side and the right side of the turntable 1; wherein the carrier 2 is used to carry the battery shell, the 3D camera 3 is used to detect whether there is a cold weld and welding slag residue in the welding of the battery sealing plate, the CCD camera 4 is used to detect scratches and surface contamination on the battery surface, and the concave detection mechanism 5 is used to detect the concave defect structure on the battery surface.

[0042] The turntable 1 in the present invention rotates 90° each time. When the turntable 1 stops after rotating, there is a carrier 2 at each of the four directions of front, back, left and right. At this time, the carrier 2 located on the front side is used for loading battery shells, and the 3D camera 3 detects the welding condition of the sealing plate of the battery shell on the carrier 2 located on the right side. The CCD camera 4 detects the surface condition of the battery shell on the carrier 2 located on the rear side. The battery shells on the carrier 2 located on the left side are classified and loaded onto trays according to qualified batteries and defective batteries through a robotic arm arranged outside the device, thereby realizing the simultaneous loading, multiple battery shell inspections and unloading, thereby improving the inspection efficiency.

[0043] Combine the following Figure 5 and Figure 6 The concave and convex detection mechanism 5 of the embodiment of the present invention is described in detail, wherein: Figure 5 A schematic diagram of the three-dimensional structure of the concave and convex detection mechanism 5 is shown; Figure 6 Shows Figure 5 Schematic diagram of the front cross-sectional structure.

[0044] The concave and convex detection mechanism 5 at least includes a detection head 51 that can move up and down and is used to detect the concave and convexity of the battery shell surface. The detection head 51 is located between the front side and the right side above the turntable 1. When the carrier 2 rotates to the direction where the detection head 51 is located, the detection head 51 abuts against the surface of the battery shell carried by the carrier 2 at the lowest end of its up and down movement stroke, thereby identifying the flatness of the battery shell surface;

[0045] The detection head 51 includes a substrate 511 and a plurality of detection units 512 distributed and connected to the substrate 511; Figure 4 The enlarged part and Figure 5 The structure of the concave and convex detection mechanism 5 in the embodiment of the present invention is as follows: a single detection unit 512 comprises a guide column 5121, a touch plate 5122 fixedly connected below the guide column 5121, a top plate 5123 fixedly connected above the guide column 5121, and an elastic contact piece 5124 fixedly connected to the lower surface of the substrate 511; a guide hole 5111 is provided on the surface of the substrate 511; the guide column 5121 is slidably connected in the guide hole 5111; a spring 5125 is sleeved on the guide column 5121; two ends of the spring 5125 are respectively fixedly connected to the top plate 5123 and the upper surface of the substrate 511; a fixed contact piece 5126 is provided on the upper surface of the touch plate 5122; the elastic contact piece 5124 is located directly above the fixed contact piece 5126; the fixed contact piece 5126 and the elastic contact piece 5124 are provided in a communication circuit connected to a computer; when the fixed contact piece 5126 contacts the elastic contact piece 5124, the computer receives a trigger signal.

[0046] In the present invention, when the detection head 51 moves toward the surface of the battery shell, the lower surface of the touch plate 5122 contacts the battery shell, and the touch plate 5122 is squeezed by the battery shell and approaches the substrate 511, and the spring 5125 is compressed and shortened. When the fixed contact piece 5126 contacts the elastic contact piece 5124, the computer receives a trigger signal, and the trigger signal indicates that the touch plate 5122 of the corresponding detection unit 512 is in contact with the surface of the battery steel shell at that moment. Since a plurality of detection units 512 are arranged on the substrate 511, when all the detection units 512 synchronize the trigger signal and transmit it to the computer, it indicates that the battery steel shell is horizontal and the surface is flat and has no concave; when the trigger signal appears at an inconsistent time, it is said that The abnormal signal indicates that the position on the surface of the battery shell corresponding to the abnormal signal is dented or deflected, which is convenient for identifying and sorting the battery steel shell. In addition, since each detection unit 512 contacts different positions on the surface of the battery shell, the position where the dent on the surface of the battery steel shell appears more frequently can be determined by analyzing the position where the abnormal signal appears, which is convenient for analyzing, guiding and troubleshooting the previous production process, optimizing the production process and improving the yield rate. In addition, when the detection units 512 at different positions are triggered continuously according to their positions, it means that the battery steel shell above the carrier 2 is not placed horizontally, which can facilitate the technician to calibrate the carrier 2 horizontally and improve the subsequent detection accuracy of the 3D camera 3 and the CCD camera 4.

[0047] The base plate 511 extends to the upper and outer sides of the turntable 1. The concave and convex detection mechanism 5 also includes a square column 52 fixedly connected to the base plate 511 on the lower surface of the end of the base plate 511. A vertical guide hole 521 is opened upwardly through the lower side of the square column 52. A vertical guide column 53 is slidably connected in the vertical guide hole 521. The lower end of the vertical guide column 53 is fixedly connected to a bottom plate 54. The bottom plate 54 and the turntable 1 are fixedly connected to a base. A compression spring 55 is arranged on the outer sleeve of the vertical guide column 53. The two ends of the compression spring 55 are respectively connected to the base and the lower end of the square column 52. A rotating shaft 56 is fixed to the side of the square column 52. The end of the rotating shaft 56 extends to the lower side of the turntable 1 and is rotatably connected to a roller 57. Four pressure blocks 8 are fixedly arranged at equal intervals under the turntable 1. The pressure blocks 8 include an inclined section 81, a horizontal section 82, and an arc section 83 in the rotation direction of the pressure block 8 moving with the turntable 1. The horizontal section 82 is located on the lower and outer side of the carrier 2.

[0048] In the present invention, the turntable 1 drives the pressing block 8 to rotate. When the roller 57 contacts the inclined section 81 of the pressing block 8, the roller 57 drives the square column 52 to gradually move downward, the square column 52 compresses the compression spring 55, and the square column 52 drives the substrate 511 and the detection head 51 to move downward synchronously; when the roller 57 moves from contacting the inclined section 81 to contacting the horizontal section 82, the carrier 2 above the pressing block 8 is exactly located below the detection head 51, and the touch plate 5122 of the detection head 51 just contacts the surface of the battery shell at the predetermined lowest end position, thereby detecting the flatness and concavity of the battery shell surface;

[0049] Optionally, a through groove 522 is opened along the length direction of the upper side of the square column 52, and the through groove 522 is connected to the vertical guide hole 521. Short columns 58 are fixed on both sides of the upper end of the vertical guide column 53. The short columns 58 extend into the through groove 522 and are slidably connected with the through groove 522. The through groove 522 limits the maximum displacement of the relative sliding between the vertical guide column 53 and the square column 52, that is, the moving stroke of the short column 58 is the length of the through groove 522. The sliding of the short column 58 in the through groove 522 improves the stability of the vertical guide column 53. At the same time, it controls the movement limits of the square column 52, the roller 57 and the detection head 51 to prevent interference due to excessive movement.

[0050] In the present embodiment, the dent detection mechanism 5 is separately arranged between the front side and the right side of the turntable 1, and there is no need to separately arrange a carrier 2 above the turntable 1 to separately detect the dent defect. Therefore, one detection station is reduced above the turntable 1, and during the dent detection process, the turntable 1 does not need to be stopped, and the continuity of the rotation of the turntable 1 for detection is not interrupted, thereby improving the detection efficiency. In addition, the common turntable 1 on the market is mostly a four-station structure, and the dent detection mechanism 5 in the present device can be quickly adapted and connected to the common turntable 1, reducing the cost of separate design and procurement.

[0051] Combined with reference Figure 2-4 In some specific embodiments, a steering mechanism 6 is provided on the right side and the rear side below the turntable 1, and the steering mechanism 6 is used to drive the carrier 2 to rotate along the central axis in the vertical direction; the steering mechanism 6 includes a rotating cylinder 61, and an adjustment block 62 fixed on the turntable of the rotating cylinder 61; the carrier 2 includes a mounting seat 21 fixedly connected to the surface of the turntable 1, a connecting seat 22 rotatably connected to the mounting seat 21, and a support block 23 fixedly connected above the connecting seat 22, the battery shell is placed in a groove on the support block 23, and an extension rod 24 is fixed below the connecting seat 22; the lower end of the extension rod 24 extends to the bottom of the turntable 1 The square can be snap-fitted and connected to the adjustment block 62 so that the connecting seat 22 and the supporting block 23 rotate synchronously with the rotating cylinder 61; specifically, an engaging groove 621 is provided on the surface of the adjustment block 62, and the engaging groove 621 includes a straight section 6211 located in the middle, and a gradual entry section 6212 symmetrically supported at both ends of the straight section 6211 and gradually widened toward both sides; the lower end of the extension rod 24 is symmetrically arranged on both sides in a flat plate shape to form a fitting surface 241, and the extension rod 24 moves from the gradual entry section 6212 to the straight section 6211 and moves out from the straight section 6211 to the gradual entry section 6212 on the other side during the rotation of the turntable 1.

[0052] When the turntable 1 drives the carrier 2 to move toward the steering mechanism 6 to the rear side or the lower right side, the extension rod 24 smoothly transitions to its fitting surface 241 and is in close contact with the inner side walls of the straight section 6211, and the 3D camera 3 and the CCD camera 4 shoot and detect the battery shell, and then, the rotating cylinder 61 drives the extension rod 24 and the connecting seat 22 to rotate, and rotates the battery shell to detect other sides of the battery shell; optionally, a stopper 25 is fixed on one side of the connecting seat 22, and limit blocks 7 are symmetrically provided on both sides of the connecting seat 22 on the upper surface of the turntable 1, and the limit blocks 7 are used to limit the maximum rotation angle of the stopper 25 to 180°. When the rotating cylinder 61 drives the connecting seat 22 to rotate until the stopper 25 contacts the limiter 7, the rotation stops, thereby ensuring that the battery shell is rotated into place and accurately positioned.

[0053] The present invention only needs to set two steering mechanisms 6 under the turntable 1 to rotate the four platforms 2 above it when they rotate to the right and rear sides. By setting the adjustment block 62, the rotating cylinder 61 and the platform 2 are set as a separate shared structure. There is no need to set a rotating cylinder 61 under each platform 2, thereby reducing the use of the rotating cylinder 61 and reducing the cost.

[0054] It should be understood that the cutting device according to the embodiment of the present invention has all the characteristics and advantages of the above-mentioned alignment mechanism. For details, please refer to the above description, which will not be repeated here.

[0055] It will be appreciated by those skilled in the art that the features described in the various embodiments of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features described in the various embodiments of the present invention may be combined and / or combined in various ways. All of these combinations and / or combinations fall within the scope of the present invention.

[0056] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination advantageously. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A battery shell visual inspection device, characterized in that: include: Turntable; Four carriers are evenly and equidistantly arranged above the turntable near the edge, and the carriers are used to carry the battery shell; A 3D camera, the 3D camera is arranged outside the right side of the turntable and facing a carrier; A CCD camera, wherein the CCD camera is arranged outside the rear side of the turntable and faces another adjacent stage; A concave and dent detection mechanism, the concave and dent detection mechanism is arranged between the front side and the right side of the turntable, and has a detection head that can move up and down and is used to detect the concave of the battery shell surface, and when the carrier rotates to the direction where the detection head is located, the detection head can abut against the surface of the battery shell carried by the carrier at the lowest end of its moving stroke; The detection head includes a substrate and a plurality of detection units distributed and connected on the substrate, wherein a single detection unit includes a guide column, a touch plate fixedly connected below the guide column, a top plate fixedly connected above the guide column, and an elastic contact piece fixedly connected to the lower surface of the substrate; wherein a guide hole is provided on the surface of the substrate, the guide column is slidably connected in the guide hole, a spring is sleeved on the guide column, and the two ends of the spring are respectively fixedly connected to the top plate and the upper surface of the substrate; a fixed contact piece is provided on the upper surface of the touch plate, and the elastic contact piece is located directly above the fixed contact piece; the fixed contact piece and the elastic contact piece are provided in a communication circuit connected to a computer, and when the fixed contact piece contacts the elastic contact piece, the computer receives a trigger signal.

2. A battery shell visual inspection device according to claim 1, characterized in that: Steering mechanisms are provided on the right side and rear side below the turntable, and the steering mechanisms are used to drive the carrier to rotate along the central axis in the vertical direction; the steering mechanism includes a rotating cylinder and an adjusting block fixed on the turntable of the rotating cylinder; the carrier includes a mounting seat fixedly connected to the surface of the turntable, a connecting seat rotatably connected to the mounting seat, and a supporting block fixedly connected to the top of the connecting seat, and an extension rod is fixed below the connecting seat, and the lower end of the extension rod extends to the bottom of the turntable and can be engaged and connected to the adjusting block so that the connecting seat and the supporting block rotate synchronously with the rotating cylinder.

3. A battery shell visual inspection device according to claim 2, characterized in that: An engaging groove is provided on the surface of the adjustment block, and the engaging groove includes a straight section located in the middle, and a gradual entry section symmetrically connected to the two ends of the straight section and gradually widening toward both sides; the two sides of the lower end of the extension rod are symmetrically arranged in a flat plate shape to form a fitting surface, and the extension rod moves from the gradual entry section to the straight section and moves out from the straight section to the gradual entry section on the other side during the rotation of the turntable, and its fitting surface can be tightly attached to the inner two side walls of the straight section.

4. A battery shell visual inspection device according to claim 3, characterized in that: A stopper is fixed on one side of the connection seat, and limit blocks are symmetrically arranged on the upper surface of the turntable on both sides of the connection seat, and the limit blocks are used to limit the maximum rotation angle of the stopper to 180°.

5. A battery shell visual inspection device according to claim 1, characterized in that: The base plate extends to the outer side above the turntable, and the concave and convex detection mechanism also includes a square column fixedly connected to the base plate on the lower surface of the end portion of the base plate, a vertical guide hole is opened upward through the lower part of the square column, and a vertical guide column is slidably connected in the vertical guide hole, and the lower end of the vertical guide column is fixedly connected to a bottom plate, and the bottom plate and the turntable are fixedly connected to a base, and a compression spring is arranged on the outer sleeve of the vertical guide column, and the two ends of the compression spring are respectively connected to the base and the lower end of the square column; a rotating shaft is fixed on the side of the square column, and the end of the rotating shaft extends to the bottom of the turntable and is rotatably connected to a roller; four pressure blocks are fixedly arranged at equal intervals under the turntable, and the pressure blocks include an inclined section, a horizontal section, and an arc section in sequence in the rotation direction of the pressure blocks moving with the turntable, and the horizontal section is located on the outer side of the bottom of the carrier, and the roller can gradually drive the square column to move downward when contacting the inclined section, and when the roller contacts the horizontal section, the touch plate contacts the surface of the battery shell.

6. A battery shell visual inspection device according to claim 5, characterized in that: A through groove is opened on the upper side of the square column along its length direction, and the through groove is connected to the vertical guide hole. Short columns are fixed on both sides of the upper end of the vertical guide column. The short columns extend into the through groove and are slidably connected with the through groove. The through groove limits the maximum displacement of relative sliding between the vertical guide column and the square column.

7. A battery shell visual inspection device according to claim 1, characterized in that: The 3D camera is fixed on a slide seat of a linear module, and the linear module moves along the front-rear direction.

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