A power battery top cover finished product detection device

Abstract

The application provides a power battery top cover finished product detection equipment, and particularly relates to the technical field of power battery top cover detection, and comprises a detection machine table. The left side of the detection machine table is a feeding end, the right side is divided into an NG top cover discharge end and an OK top cover discharge end, and the top surface of the detection machine table is sequentially provided with a composite conveying and identifying mechanism, a four-station conveying mechanism, a top cover first comprehensive visual inspection mechanism, a first twin-pickup transfer mechanism, a top cover second comprehensive visual inspection mechanism, a second twin-pickup transfer mechanism, a short side visual inspection mechanism, a third twin-pickup transfer mechanism and an OK top cover transfer mechanism along the feeding end to the discharge end. The power battery top cover finished product detection equipment solves the defects of low pickup efficiency, incomplete detection coverage, large positioning deviation and chaotic shunting of the existing equipment by cooperation of the above mechanisms, and realizes integrated detection of the power battery top cover in the whole process with automation, high efficiency and high precision, and automatic shunting of qualified and unqualified products.

Description

Technical Field

[0001] This application provides a testing device for finished power battery top covers, specifically relating to the field of power battery top cover testing technology. Background Technology

[0002] The top cover of a power battery is a critical safety and functional component. Its terminals, injection holes, flatness, and appearance defects directly affect the battery's sealing performance and electrical reliability. Therefore, it must undergo comprehensive automated inspection before leaving the factory. Currently, most top cover inspection equipment in the industry uses a multi-station turntable combined with a vision camera to screen for defects. However, existing equipment still has significant shortcomings in terms of inspection coverage, throughput efficiency, and integrated process, making it difficult to meet the high-speed, high-precision inspection requirements of power battery production lines.

[0003] For example, the existing patent CN117420070A, an all-around appearance inspection device, mainly uses multiple sets of side cameras to detect defects on the outer surface of the top cover. However, its technical solution lacks a synchronous imaging structure for the bottom surface and injection hole of the top cover, making it unable to detect the flatness of the bottom surface and defects on the inner wall of the injection hole, resulting in obvious blind spots and difficulty in achieving full defect coverage. While the multi-station cover defect inspection equipment in patent CN118624628A uses a rotary conveyor structure for multi-station operation, its rotary table lacks a pre-reserved optical path for bottom surface inspection, making it unable to cooperate with the bottom surface line scan camera to complete flatness detection. It can only screen for local defects on the top surface of the top cover. Furthermore, the detection device of patent CN117969541B only detects defects in a single process of the top cover, and does not form an integrated process from barcode identification and multi-station detection to classified material discharge; finally, the top cover weld inspection device of patent CN220154293U only focuses on the detection of welding defects, has a single function, and cannot complete the full inspection of key parts such as poles and injection holes.

[0004] In addition, existing equipment mostly adopts a single-station picking structure, which has low turnover efficiency and lacks a double-sided positioning and correction structure. The posture deviation during the top cover conveying process can easily lead to misjudgment in detection, making it difficult to achieve full-process automation and high-efficiency detection. Summary of the Invention

[0005] In view of the deficiencies of the existing technology, this application provides a power battery top cover finished product testing equipment, which can effectively solve the related technical problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] This application discloses a power battery top cover finished product testing equipment, including a testing machine. The left side of the testing machine is the feeding end, and the right side is divided into an NG top cover feeding end and an OK top cover feeding end. The top surface of the testing machine is arranged sequentially from the feeding end to the feeding end, including a composite conveying and identification mechanism, a four-station conveying mechanism, a first comprehensive visual inspection mechanism for top covers, a first twin-pick-up and transfer mechanism, a second comprehensive visual inspection mechanism for top covers, a second twin-pick-up and transfer mechanism, a short-side visual inspection mechanism, a third twin-pick-up and transfer mechanism, and an OK top cover transfer mechanism.

[0008] The composite conveying identification mechanism has top cover positioning components symmetrically arranged on both sides of the feeding conveying station and the reversing conveying station. The composite conveying identification mechanism is equipped with two sets of dual-station rotating negative pressure picking components with the same structure. Each set of dual-station rotating negative pressure picking components rotates 180° to realize that one set of adsorption plates picks up the top cover at the picking station while the other set of adsorption plates releases the top cover at the discharging station.

[0009] A top cover barcode scanning and identification component is mounted above the composite conveyor identification mechanism;

[0010] The four-station conveying mechanism includes a four-station disk driven by a stepper motor, with four transparent top cover fixtures evenly distributed on the top surface of the four-station disk; the stepper motor drives the four-station disk to rotate intermittently, rotating 90° each time, so that the top cover stops sequentially at the four detection stations.

[0011] The first comprehensive visual inspection mechanism of the top cover is set above and below the four-station conveying mechanism. A top surface pole detection camera, a bottom surface line scan detection camera, and a coaxial supplementary light injection hole detection camera are set above and below the top cover fixture. The three sets of cameras simultaneously collect images of the top surface, bottom surface, and injection hole when the top cover is stopped on the same fixture.

[0012] The second integrated visual inspection mechanism of the top cover includes two sets of alternating dual-station linear transfer components. Each set of dual-station linear transfer components consists of a second linear scanning module, a lifting cylinder, and a top cover fixture.

[0013] Two sets of transfer components move alternately back and forth: when one set moves the top cover from the first inspection station to the second inspection station, the other set returns to its original position to receive the next top cover;

[0014] A first 3D vision camera, a top surface line scan detection camera, a second 3D vision camera, and two sets of long-side vision inspection cameras are staggered above the transfer path;

[0015] The first 3D vision camera is positioned ahead of the top surface line scan detection camera on the transfer path, and there is a height difference between the two in the vertical direction to avoid light source interference;

[0016] The second 3D vision camera is located after the first 3D vision camera and is used for secondary re-inspection;

[0017] The short-side inspection mechanism includes a second reversing conveyor and a short-side inspection camera. The short-side inspection camera is symmetrically mounted on the second reversing conveyor. Another set of top cover positioning components is symmetrically arranged on both sides of the conveying station of the second reversing conveyor.

[0018] The third twin picking and transferring mechanism works in conjunction with two sets of NG top cover discharge conveying devices, and the OK top cover transfer mechanism works in conjunction with the OK top cover discharge conveying device to automatically divert and discharge NG top covers and OK top covers respectively.

[0019] In summary, the technical solution provided in this application has at least one of the following advantages compared with the prior art:

[0020] This power battery top cover finished product testing equipment solves the defects of existing equipment such as low picking efficiency, incomplete detection coverage, large positioning deviation, and chaotic diversion by sequentially arranging composite conveying and identification, four-station conveying, multiple sets of comprehensive visual inspection and diversion discharge mechanisms along the flow path, combined with dual-station rotary negative pressure picking, transparent through-grid, upper and lower synchronous detection, dual-station alternating transfer and multi-station positioning technology. It achieves fully automated, high-efficiency, and high-precision integrated testing of power battery top covers and automatic diversion of qualified and unqualified products.

[0021] The dual-sided symmetrical top cover positioning components, combined with the belt conveyor structure, can adaptively correct the conveying posture of the top cover, eliminate position offset errors during circulation, ensure the docking accuracy of each picking and inspection station, reduce inspection misjudgments and picking failures caused by posture deviations, and make the equipment operation more stable.

[0022] The combined supplementary lighting unit works in conjunction with multiple types of vision cameras to eliminate reflections on the top cover surface and blind spots in the inspection, allowing for clear imaging of defects and dimensional information of the poles, injection holes, bottom surface, and sides, significantly reducing the probability of misjudgment and ensuring the accuracy and reliability of the top cover inspection results.

[0023] The vacuum adsorption structure is equipped with a negative pressure detection sensor, which only performs the transfer action after the adsorption is stable, to prevent the top cover from falling off, scratching or deforming during the transfer. It is suitable for the thin and precise characteristics of the top cover, effectively protecting the appearance and structural integrity of the workpiece.

[0024] The dual-station linear transfer components operate alternately, eliminating waiting gaps at the inspection stations. Combined with multi-camera staggered step-by-step inspection, it can match the high-speed production line cycle time. NG products are sorted and discharged by type, which also facilitates subsequent sorting and rework of defective products, improving overall production management efficiency. Attached Figure Description

[0025] Figure 1 This is the main view structure diagram of this application;

[0026] Figure 2This is a three-dimensional structural diagram from another perspective of this application;

[0027] Figure 3 This is a partial three-dimensional structural diagram of the relevant components of the composite conveying identification mechanism and the four-station conveying mechanism in this application;

[0028] Figure 4 This is another partial three-dimensional structural view of the relevant components of the composite conveying identification mechanism and the four-station conveying mechanism in this application;

[0029] Figure 5 This is a partial three-dimensional structural diagram of the relevant components at the first integrated visual inspection mechanism on the top cover in this application;

[0030] Figure 6 This is another partial three-dimensional structural view of the relevant components at the first integrated visual inspection mechanism on the top cover in this application;

[0031] Figure 7 This is a partial three-dimensional structural diagram of the top cover of the first twin pickup and transfer mechanism and related components of the second integrated inspection mechanism in this application;

[0032] Figure 8 This is a partial three-dimensional structural diagram of the relevant components at the second integrated inspection mechanism on the top cover in this application;

[0033] Figure 9 This is another partial perspective view of the relevant components at the second integrated inspection mechanism on the top cover in this application;

[0034] Figure 10 This is a partial three-dimensional structural diagram of the relevant components of the second integrated inspection mechanism and the second twin pickup and transfer mechanism in the top cover of this application;

[0035] Figure 11 This is a partial three-dimensional structural diagram of the relevant components at the short-side inspection mechanism in this application;

[0036] Figure 12 This is a partial perspective view of the relevant components of the OK top cover transfer mechanism in this application;

[0037] Figure 13 For this application Figure 2 Enlarged view of the structure at point A in the middle.

[0038] The labels in the diagram represent:

[0039] 1. Testing equipment;

[0040] 2. Composite conveying and identification mechanism;

[0041] 21. Feeding and conveying device;

[0042] 22. First dual-station negative pressure pickup assembly; 221. Gantry frame; 222. Servo rotary unit; 223. Concave frame; 224. Pickup cylinder; 225. First vacuum adsorption plate;

[0043] 23. First reversing conveyor device;

[0044] 24. Identification component; 241. First guide rail; 242. Barcode scanner;

[0045] 25. Top cover positioning assembly; 251. Positioning cylinder; 252. Positioning clamp;

[0046] 26. Second dual-station negative pressure pickup assembly;

[0047] 3. Four-station conveyor mechanism; 31. Stepper motor; 32. Four-station panel; 33. Top cover fixture 1;

[0048] 4. First comprehensive visual inspection unit for the roof;

[0049] 41. First visual inspection assembly; 411. Support frame; 412. Horizontal adjustment unit; 413. Area array inspection camera; 414. First line scan linear module; 4141. First vertical adjustment unit; 415. Bottom surface line scan inspection camera;

[0050] 42. Second inspection assembly; 421. Second guide rail; 422. Hole-position inspection camera; 423. Combined supplementary lighting unit;

[0051] 5. First twin-piece pickup and transfer mechanism; 51. Transfer linear module; 52. Transfer cylinder; 53. Second vacuum adsorption plate;

[0052] 6. Second comprehensive visual inspection unit on the top cover;

[0053] 61. Dual-station linear transfer assembly; 611. Second linear scanning module; 612. Lifting cylinder; 613. Top cover fixture two;

[0054] 62. Modular visual inspection assembly; 621. H-shaped frame; 622. Second vertical adjustment unit; 623. First 3D vision camera; 624. Top surface line scan inspection camera; 625. Second 3D vision camera; 626. Long side visual inspection camera;

[0055] 7. Second twin pickup and transfer mechanism;

[0056] 8. Short-side inspection mechanism; 81. Second reversing conveyor; 82. Short-side inspection camera;

[0057] 9. Third twin-piece pickup and transfer mechanism; 91. NG top cover discharge conveyor;

[0058] 10. OK top cover transfer mechanism;

[0059] 101. Transfer assembly; 1011. Four-axis robotic arm; 1012. Third vacuum adsorption plate;

[0060] 102. OK top cover discharge conveyor device. Detailed Implementation

[0061] The present application will be further described below with reference to embodiments.

[0062] As an example of this application:

[0063] Reference Appendix Figures 1 to 13 As shown, a power battery top cover finished product testing equipment includes a testing machine 1; the left side of the testing machine 1 is the feeding end, and the right side is divided into an NG top cover feeding end and an OK top cover feeding end. The top surface of the testing machine 1 is arranged sequentially from the feeding end to the feeding end to the feeding end, including a composite conveying and identification mechanism 2, a four-station conveying mechanism 3, a first comprehensive visual inspection mechanism for top covers 4, a first twin-pick-up and transfer mechanism 5, a second comprehensive visual inspection mechanism for top covers 6, a second twin-pick-up and transfer mechanism 7, a short-side visual inspection mechanism 8, a third twin-pick-up and transfer mechanism 9, and an OK top cover transfer mechanism 10.

[0064] The specific configuration is as follows: The testing machine 1 has a built-in electrical control unit and industrial control module, which coordinates the motion sequence of each mechanism, the detection signal and the negative pressure adsorption action to ensure that the whole machine is linked without interference and operates stably.

[0065] Further implemented, the composite conveying and identification mechanism 2 includes a feeding conveying device 21, a first dual-station rotary negative pressure pickup assembly 22, a first reversing conveying device 23, an identification assembly 24, a top cover positioning assembly 25, and a second dual-station rotary negative pressure pickup assembly 26.

[0066] Specifically, the feeding conveyor 21 and the first reversing conveyor 23 are both belt conveyor structures, including a drive motor, a drive roller, a driven roller, an annular conveyor belt and two side support plates. The principle is that the drive motor drives the drive roller to rotate, which in turn drives the conveyor belt to perform closed-loop transmission. Its function is to smoothly carry and directionally convey the top cover. The reversing conveyor can change the flow direction of the top cover to adapt to the layout of subsequent workstations.

[0067] Both the feeding conveyor 21 and the first reversing conveyor 23 are set on the top surface of the testing machine 1. The top cover positioning components 25 are symmetrically distributed on both sides of the picking station of the feeding conveyor 21 and the first reversing conveyor 23. The symmetrical top cover positioning components on both sides can adaptively correct the top cover conveying posture, eliminate conveying offset error, and ensure picking accuracy.

[0068] The identification component 24 is mounted above the first reversing conveyor 23. The composite conveying identification mechanism 2 is equipped with two sets of dual-station rotary negative pressure pickup components with the same structure. The first dual-station rotary negative pressure pickup component 22 and the second dual-station rotary negative pressure pickup component 26 have the same structure, both including a gantry frame 221, a servo rotation unit 222, a concave frame 223, a pickup cylinder 224 and a first vacuum adsorption plate 225.

[0069] Specifically, the first vacuum adsorption plate 225 includes a rigid mounting base, a flexible silicone adsorption head, a negative pressure connection connector, and a negative pressure detection sensor. The principle is that an external negative pressure air source forms a negative pressure suction force, which is adsorbed by the flexible adsorption head adhering to the surface of the top cover. The function is to achieve pick-up without scratching or deformation of the top cover. The negative pressure detection sensor can monitor the adsorption status in real time to prevent the adsorption from being weak and falling off.

[0070] A gantry frame 221 is fixed to the top surface of the testing machine 1. A servo rotation unit 222 is installed on the gantry frame 221. A concave frame 223 is connected to the servo rotation unit 222 via a transmission. Two sets of pickup cylinders 224 are symmetrically installed on both sides of the concave frame 223. A first vacuum adsorption plate 225 is fixed to the telescopic end of the pickup cylinder 224. Each first vacuum adsorption plate is equipped with a negative pressure detection sensor. The rotation action is only performed after the adsorption is stable to prevent the top cover from falling off.

[0071] The servo rotation unit 222 drives the concave frame 223 to rotate 180°, so that while one set of first vacuum adsorption plates 225 picks up the top cover at the picking station, another set of first vacuum adsorption plates 225 releases the top cover at the unloading station. A top cover scanning and identification component is installed above the composite conveying and identification mechanism 2. The identification data of the scanned code is uploaded to the industrial control module in real time and bound to the subsequent test results for storage, so as to realize the quality traceability of a single top cover throughout the entire process.

[0072] The four-station conveying mechanism 3 includes a stepper motor 31 and a four-station disk 32 driven by the stepper motor. Four transparent top cover fixtures 33 are evenly distributed on the top surface of the four-station disk 32. The stepper motor 31 is fixed to the top surface of the testing machine 1. The bottom edge of the top cover fixture 33 is engaged with the top surface of the four-station disk 32. The top cover fixture 33 is made of transparent material, which can avoid blocking the bottom detection light path and ensure that there is no blind spot between the bottom surface and the liquid injection hole. The stepper motor drives the four-station disk 32 to rotate intermittently, rotating 90° each time, so that the top cover stops in sequence at the four detection stations. The stopping position of the station is calibrated by the positioning sensor to ensure that the top cover and the detection camera are accurately aligned.

[0073] The top cover first integrated visual inspection mechanism 4 is mounted above and below the four-station conveyor mechanism 3, and includes a first visual inspection component 41 and a second visual inspection component 42. The first visual inspection component 41 includes two sets of horizontally adjustable area array inspection cameras 413 and a set of vertically adjustable bottom surface line scan inspection cameras 415. The second visual inspection component 42 includes a coaxially arranged hole-position visual inspection camera 422 and a combined supplementary lighting unit 423. Specifically, the combined supplementary lighting unit 423 consists of an upper ring light source, a lower direct light source, a light source mounting bracket, and a dimming controller. The principle is that the ring light source shines obliquely to eliminate the specular reflection on the top cover surface, and the direct light source shines through from the bottom to eliminate the shadow inside the hole. Its function is to provide a uniform and interference-free lighting environment for hole position detection and improve the clarity of hole position contour imaging. Corresponding to the top cover fixture 33 position, a top surface pole detection camera, a bottom surface line scan detection camera, and a coaxial supplementary light injection hole detection camera are set up above and below. When the top cover is stopped in the same fixture, the three sets of cameras simultaneously acquire images of the top surface, bottom surface and injection hole. Simultaneous acquisition can shorten the detection time of a single workpiece and adapt to the production cycle of high-speed production lines.

[0074] Further implemented, the first twin-pick-and-transfer mechanism 5, the second twin-pick-and-transfer mechanism 7, and the third twin-pick-and-transfer mechanism 9 have the same structure, each including two sets of linear transfer modules 51, a transfer cylinder 52, and a second vacuum adsorption plate 53. The linear transfer module 51 is a servo-driven linear module, specifically including a module housing, a servo motor, a transmission screw, a linear guide rail, and a sliding moving seat. The principle is that the servo motor drives the screw to rotate, which drives the sliding moving seat to make precise linear reciprocating motion along the guide rail. Its function is to realize long-distance precise transfer of the top cover and ensure the accuracy of the transfer position. The linear transfer module 51 is fixed on the top surface of the testing machine 1. The top cover is transferred by the translation of the two modules. The two sets of linear transfer modules adopt asynchronous alternating action. When one set is transferred, the other set is reset and ready, so there is no wasted idle stroke. The second vacuum adsorption plate 53 has the same structure and function as the first vacuum adsorption plate. It relies on negative pressure adsorption to realize the stable transfer of the top cover.

[0075] The second integrated visual inspection mechanism 6 for the top cover includes two sets of alternating dual-station linear transfer components 61 and a combined visual inspection component 62. Each set of dual-station linear transfer components 61 consists of a second linear scanning module 611, a lifting cylinder 612, and a second top cover fixture 613. The second linear scanning module 611 has the same structural principle as the transfer linear module 51 and is used to drive the top cover to perform linear scanning transfer, adapting to the continuous imaging requirements of the linear scanning camera. The second linear scanning module 611 is fixed on the inspection machine. 1. Top surface; Two sets of transfer components move alternately back and forth: one set moves the top cover from the first inspection station to the second inspection station, while the other set returns to its original position to receive the next top cover. This alternating operation eliminates waiting gaps between stations, significantly increasing inspection throughput; The combined inspection component 62 includes an H-shaped frame 621, a second vertical adjustment unit 622, a first 3D vision camera 623, a top surface line scan inspection camera 624, a second 3D vision camera 625, and two sets of long-side inspection cameras 626; H-shaped frame 621 is fixed on the top surface of the inspection machine 1. The first 3D vision camera 623 is mounted on the H-shaped frame 621 through the second vertical adjustment unit 622 and its height can be adjusted. The top surface line scan inspection camera 624 is mounted on the H-shaped frame 621 and located below the first 3D vision camera 623. The second 3D vision camera 625 and two sets of long-side inspection cameras 626 are mounted on the other side of the H-shaped frame 621. The first 3D vision camera 623, the top surface line scan inspection camera 624, the second 3D vision camera 625 and the two sets of long-side inspection cameras 626 are staggered above the transfer path. The first 3D vision camera 623 is located in front of the top surface line scan inspection camera 624 on the transfer path, and there is a height difference between the two in the vertical direction. The vertical height difference can avoid the interference between the two sets of inspection light sources and ensure the clarity of the image. The second 3D vision camera 625 is located after the first 3D vision camera 623 and is used for secondary inspection. Secondary inspection can effectively reduce the misjudgment rate of dimensional and appearance defects.

[0076] The short-side inspection mechanism 8 includes a second reversing conveyor 81 and a short-side inspection camera 82. The structure and principle of the second reversing conveyor 81 are the same as those of the aforementioned reversing conveyor, and it is used to adjust the conveying posture of the top cover to adapt to the short-side inspection. Both the second reversing conveyor 81 and the short-side inspection camera 82 are fixed on the top surface of the inspection machine 1. There are two sets of short-side inspection cameras 82, which are located on both sides of the conveying path of the second reversing conveyor 81. Another set of top cover positioning components 25 are symmetrically arranged on both sides of the conveying station of the second reversing conveyor 81. The positioning components recalibrate the posture of the top cover before inspection to ensure that the images acquired by the short-side inspection camera are complete and effective.

[0077] The third twin-pick-and-transfer mechanism 9 works in conjunction with two sets of NG top cover discharge conveyors 91. The NG top cover discharge conveyors 91 are two parallel belt conveyors, each corresponding to different NG types of top covers. The top covers are discharged according to their defect type, which facilitates subsequent sorting and rework of defective products. The OK top cover transfer mechanism 10 includes a four-axis robot 1011, a third vacuum adsorption plate 1012, and an OK top cover discharge conveyor 102. The third vacuum adsorption plate 1012 also adopts a negative pressure adsorption structure to meet the flexible transfer requirements of the four-axis robot. The four-axis robot 1011 is fixed on the top surface of the inspection platform 1. The four-axis robot 1011 drives the third vacuum adsorption plate 1012 to move and adsorb and transfer the OK top cover to the OK top cover discharge conveyor 102. The OK top cover transfer mechanism 10 works in conjunction with the OK top cover discharge conveyor 102 and the third twin-pick-and-transfer mechanism 9 to complete the automatic diversion and discharge of NG top covers and OK top covers.

[0078] The complete working and usage principle of the above embodiments is as follows:

[0079] After the equipment is started, the pre-processed power battery top cover enters the composite conveying and identification mechanism 2 from the feeding end of the testing machine 1. It is then conveyed to the picking station by the feeding conveyor 21. The double-sided top cover positioning component 25 first corrects the top cover posture. The first double-station rotary negative pressure picking component 22 completes the picking and unloading of the top cover by rotating 180° synchronously. The top cover moves with the first reversing conveyor 23 and is scanned and identified by the identification component 24 above, and the information is recorded. Subsequently, the top cover is transferred to the top cover fixture 33 of the four-station conveying mechanism 3 by the second double-station rotary negative pressure picking component 26. The stepper motor drives the four-station disk 32 to rotate 90° intermittently each time, sending the top cover to the testing station of the first comprehensive visual inspection mechanism 4 of the top cover in sequence. The top surface pole detection phases arranged on the upper and lower sides are then inspected. The top surface, bottom surface, and injection hole detection cameras simultaneously acquire images, and with the illumination of the combined supplementary lighting unit 423, the top surface, bottom surface, and injection hole of the top cover are inspected in an integrated manner. After the inspection is completed, the first twin pickup and transfer mechanism 5, in cooperation with the vacuum adsorption plate, transfers the top cover to the dual-station linear transfer assembly 61 of the second integrated inspection mechanism 6. The two sets of linear transfer assemblies alternately transport the top cover. During the transfer, the multiple cameras of the combined inspection assembly 62 sequentially complete the inspection and secondary re-inspection of the 3D dimensions, flatness, and long side of the top surface of the top cover. Afterwards, the top cover is transferred by the second twin pickup and transfer mechanism 7 to the short side inspection mechanism 8. After the top cover is positioned and the short side inspection camera 82 completes the inspection of the short side of the top cover.

[0080] Finally, based on the full-process inspection results, the third twin picking and transferring mechanism 9 sorts and transfers different types of NG top covers to the corresponding NG top cover discharge conveyor 91, while OK top covers are transferred to OK top cover discharge conveyor 102 by the four-axis robot arm of the OK top cover transfer mechanism 10 in conjunction with the vacuum adsorption plate, thus completing the full-process automated inspection of power battery top covers and the diversion and discharge of qualified and unqualified products.

[0081] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 this application.

Claims

1. A testing device for finished power battery top covers, comprising a testing machine (1), characterized in that: The left side of the inspection machine (1) is the feeding end, and the right side is divided into the NG top cover discharge end and the OK top cover discharge end. The top surface of the inspection machine (1) is arranged in sequence from the feeding end to the discharge end as follows: composite conveying and identification mechanism (2), four-station conveying mechanism (3), top cover first comprehensive visual inspection mechanism (4), first twin picking and transferring mechanism (5), top cover second comprehensive visual inspection mechanism (6), second twin picking and transferring mechanism (7), short side visual inspection mechanism (8), third twin picking and transferring mechanism (9) and OK top cover transfer mechanism (10). The composite conveying identification mechanism (2) is symmetrically equipped with top cover positioning components (25) on both sides of the feeding conveying station and the reversing conveying station. The composite conveying identification mechanism (2) is equipped with two sets of dual-station rotating negative pressure picking components with the same structure. Each set of dual-station rotating negative pressure picking components rotates 180° to realize that one set of adsorption plates picks up the top cover at the picking station while the other set of adsorption plates releases the top cover at the discharging station. A top cover scanning identification component is mounted above the composite conveying identification mechanism (2); The four-station conveying mechanism (3) includes a four-station disk (32) driven by a stepper motor. Four transparent top cover fixtures (33) are evenly distributed on the top surface of the four-station disk (32). The stepper motor drives the four-station disk (32) to rotate intermittently, rotating 90° each time, so that the top cover stops in the four detection stations in sequence. The first comprehensive visual inspection mechanism (4) of the top cover is set above and below the four-station conveying mechanism (3). A top surface pole detection camera, a bottom surface line scan detection camera and a coaxial supplementary light injection hole detection camera are set above and below the position of the top cover fixture (33). The three sets of cameras simultaneously collect images of the top surface, bottom surface and injection hole when the top cover stops at the same fixture. The second comprehensive inspection mechanism (6) of the top cover includes two sets of alternating dual-station linear transfer components (61). Each set of dual-station linear transfer components (61) consists of a second line scanning linear module (611), a lifting cylinder (612), and a second top cover fixture (613). Two sets of transfer components move alternately back and forth: when one set moves the top cover from the first inspection station to the second inspection station, the other set returns to its original position to receive the next top cover; A first 3D vision camera (623), a top surface line scan detection camera (624), a second 3D vision camera (625), and two sets of long-side visual inspection cameras (626) are staggered above the transfer path. The first 3D vision camera (623) is located in front of the top surface line scan detection camera (624) on the transfer path, and there is a height difference between the two in the vertical direction to avoid light source interference; The second 3D vision camera (625) is located after the first 3D vision camera (623) and is used for secondary re-inspection; The short-side inspection mechanism (8) includes a second reversing conveyor (81) and a short-side inspection camera (82). The short-side inspection camera (82) is symmetrically installed on the second reversing conveyor (81). Another set of top cover positioning components (25) is symmetrically provided on both sides of the conveying station of the second reversing conveyor (81). The third twin picking and conveying mechanism (9) works with two sets of NG top cover discharge conveying devices (91), and the OK top cover conveying mechanism (10) works with the OK top cover discharge conveying device (102) to complete the automatic diversion and discharge of NG top cover and OK top cover respectively.

2. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The composite conveying and identification mechanism (2) includes a feeding conveying device (21), a first dual-station rotary negative pressure pickup assembly (22), a first reversing conveying device (23), an identification assembly (24), a top cover positioning assembly (25), and a second dual-station rotary negative pressure pickup assembly (26). The feeding conveyor (21) and the first reversing conveyor (23) are both set on the top surface of the testing machine (1). The top cover positioning component (25) is symmetrically distributed on both sides of the picking station of the feeding conveyor (21) and the first reversing conveyor (23). The identification component (24) is mounted on the top of the first reversing conveyor (23).

3. The power battery top cover finished product testing equipment according to claim 2, characterized in that, The first dual-station rotary negative pressure pickup assembly (22) and the second dual-station rotary negative pressure pickup assembly (26) have the same structure, both including a gantry frame (221), a servo rotation unit (222), a concave frame (223), a pickup cylinder (224) and a first vacuum adsorption plate (225). A gantry frame (221) is fixed on the top surface of the testing machine (1), a servo rotation unit (222) is installed on the gantry frame (221), a concave frame (223) is connected to the servo rotation unit (222) for transmission, two sets of pickup cylinders (224) are symmetrically installed on both sides of the concave frame (223), and a first vacuum adsorption plate (225) is fixed on the telescopic end of the pickup cylinder (224); The servo rotation unit (222) drives the concave frame (223) to rotate 180°, so that the two sets of first vacuum adsorption plates (225) can pick up and release materials synchronously.

4. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The four-station conveying mechanism (3) also includes a stepper motor (31). The stepper motor (31) is fixed on the top surface of the testing machine (1), and the bottom edge of the top cover fixture (33) is snapped onto the top surface of the four-position plate (32). The top cover fixture (33) is made of transparent material.

5. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The top cover first integrated visual inspection mechanism (4) includes a first visual inspection component (41) and a second visual inspection component (42); The first inspection component (41) includes two sets of horizontally adjustable area array inspection cameras (413) and a set of vertically adjustable bottom surface line scan inspection cameras (415). The second inspection component (42) includes a hole inspection camera (422) and a combined supplementary lighting unit (423) arranged coaxially.

6. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The first twin pickup and transfer mechanism (5), the second twin pickup and transfer mechanism (7) and the third twin pickup and transfer mechanism (9) have the same structure, each including two sets of transfer linear modules (51), transfer cylinders (52) and a second vacuum adsorption plate (53). The transfer linear module (51) is fixed on the top surface of the testing machine (1), and the top cover is transferred by the translation of the two modules.

7. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The top cover second integrated inspection mechanism (6) also includes a combined inspection component (62); The combined visual inspection assembly (62) includes an H-shaped frame (621), a second vertical adjustment unit (622), a first 3D vision camera (623), a top surface line scan inspection camera (624), a second 3D vision camera (625), and two sets of long-side visual inspection cameras (626). The H-shaped frame (621) is fixed on the top surface of the inspection machine (1). The first 3D vision camera (623) is mounted on the H-shaped frame (621) through the second vertical adjustment unit (622) and its height can be adjusted. The top surface line scan inspection camera (624) is mounted on the H-shaped frame (621) and located below the first 3D vision camera (623). The second 3D vision camera (625) and two sets of long-side inspection cameras (626) are mounted on the other side of the H-shaped frame (621).

8. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The second reversing conveyor (81) and the short-side inspection camera (82) of the short-side inspection mechanism (8) are both fixed on the top surface of the inspection machine (1); there are two sets of short-side inspection cameras (82), which are located on both sides of the conveying path of the second reversing conveyor (81).

9. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The OK top cover transfer mechanism (10) includes a four-axis manipulator (1011), a third vacuum adsorption plate (1012), and an OK top cover discharge conveyor (102). The four-axis robot (1011) is fixed on the top surface of the testing machine (1). The four-axis robot (1011) drives the third vacuum adsorption plate (1012) to move and adsorb the OK top cover to the OK top cover discharge conveyor (102).

10. The power battery top cover finished product testing equipment according to claim 1, characterized in that, The NG top cover discharge conveyor (91) consists of two parallel belt conveyors, each corresponding to the discharge of top covers of different NG types.

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