A battery module welding detection device

Abstract

The utility model discloses a battery module welding detection device, including two parallelly arranged portal frame, two portal frame respectively are arranged with X axle linear module, slide rail, be connected with mounting bracket between X axle linear module and slide rail, and Y axle linear module is arranged on mounting bracket, and Z axle linear module is arranged with lift installation big board, and 3D line laser camera is arranged on lift installation big board, and lift installation big board is arranged with transition mounting plate, and transition mounting plate is installed with transition cushion block, and transition cushion block is installed with screw rod sliding table, and the workstation of screw rod sliding table is installed with 2D camera through camera mounting plate, and 3D line laser camera and 2D camera are located at different horizontal height, and the camera calibration block is set below Y axle linear module, and the camera calibration block is helpful to guarantee camera detection accuracy, and the screw rod sliding table is convenient for flexible adjustment 2D camera's up and down position.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically to a battery module welding testing device. Background Technology

[0002] Traditional battery module welding inspection requires manual measurement of the welding position using calipers to determine if there are any missing welds, tilted welds, or misaligned welds. Manual inspection of the weld surface for defects such as pinholes, burn-through, and cracks is also necessary. This process is inefficient. Therefore, battery module welding inspection devices have received increasing attention in recent years. Existing technologies, such as patent publication number CN219301539U, disclose a line and surface contour measurement system based on a 3D camera and an area scan camera, including a frame, a moving mechanism, a 3D camera, an area scan camera, a product carrier, and a camera... The system consists of a calibration block and a PLC. A moving mechanism is mounted on the frame, and a 3D camera and an area scan camera are mounted on the moving mechanism. A product carrier and a camera calibration block are located below the frame. The moving mechanism, the 3D camera, and the area scan camera are all electrically connected to the PLC. The camera calibration block consists of nine cylinders and a base plate. The nine cylinders are evenly distributed on the base plate in a three-row, three-column arrangement. The lengths of the nine cylinders are different, but the positions of the 3D camera and the area scan camera are relatively fixed. The fixed camera positions limit the flexibility of the system layout and are not conducive to further improving the accuracy and reliability of camera measurements. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and to provide a battery module welding inspection device.

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

[0005] A battery module welding inspection device includes two parallel gantry frames. An X-axis linear module and a slide rail are respectively arranged on the two gantry frames. A mounting frame connects the slide table of the X-axis linear module to the slider of the slide rail. A Y-axis linear module is arranged on the mounting frame, and a lifting mounting plate is arranged on the Z-axis linear module. A 3D line laser camera is arranged on one side of the lifting mounting plate, and a transition mounting plate is arranged on the other side. A transition pad is mounted on the transition mounting plate, and a lead screw slide is mounted on the transition pad. A 2D camera is mounted on the worktable of the lead screw slide via a camera mounting plate. The 3D line laser camera and the 2D camera are located at different horizontal heights. A camera calibration block is provided below the Y-axis linear module. The camera calibration block includes a central calibration part and two side calibration parts on both sides. The central calibration part includes a left stepped part and a right stepped part symmetrically arranged thereto. The side calibration parts are provided with several calibration holes.

[0006] In some embodiments of this utility model, the 3D line laser camera is arranged at a lower horizontal height than the 2D camera, and the arrangement distance between the 2D camera and the lifting mounting plate is greater than the arrangement distance between the 3D line laser camera and the lifting mounting plate.

[0007] In some embodiments of this utility model, a vertical mounting plate is installed at the lower end of the lifting mounting plate, and the 3D line laser camera is mounted on the vertical mounting plate.

[0008] In some embodiments of this utility model, a mounting sheet metal part is connected to the outside of the camera mounting plate, and a light source mounting plate is vertically arranged at the lower end of the mounting sheet metal part. The light source mounting plate has an opening facing the lens of the 2D camera, and a number of mounting holes for mounting the camera light source are arranged around the opening.

[0009] In some embodiments of this utility model, a first cable protection drag chain is mounted on the upper side of the X-axis linear module, a second cable protection drag chain is provided on the top of the mounting frame, and the Y-axis linear module is arranged on the front side of the mounting frame.

[0010] In some embodiments of this utility model, the mounting frame includes a connecting horizontal plate, a plurality of support plates are provided on the connecting horizontal plate, a front vertical plate is provided at the front end of the support plate, a drag chain mounting plate is provided at the top of the support plate, and the Y-axis linear module is mounted on the front vertical plate.

[0011] In some embodiments of this utility model, the gantry frame includes two columns, a crossbeam connects the two columns, a diagonal brace is provided at the angle between the crossbeam and the column, a testing station for placing battery modules is provided between the two gantry frames, a mounting bracket is arranged on the column of any gantry frame, an industrial barcode scanner is provided on the mounting bracket, and the industrial barcode scanner faces the testing station.

[0012] In some embodiments of this utility model, the left and right stepped sections are marked with corresponding step size parameters, and the side calibration section is marked with corresponding calibration hole size parameters.

[0013] In some embodiments of this invention, the lens of the 2D camera is positioned higher than that of the 3D line laser camera.

[0014] In some embodiments of this invention, the lens of the 2D camera is positioned 5-100mm higher than the top surface of the 3D line laser camera.

[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following advantages:

[0016] Beneficial effects:

[0017] 1. The 2D camera is mounted on the worktable of the lead screw slide. The lead screw slide is used to adjust the vertical position of the 2D camera, which helps to flexibly adjust the detection image acquisition range of the 2D camera and adapt to the battery modules under test of different heights. This allows for adjustment to a better shooting height during shooting and the acquisition of high-quality detection images.

[0018] 2. The 3D line laser camera and the 2D camera are located at different horizontal heights. The lens of the 2D camera is positioned higher than that of the 3D line laser camera. Positioning them at different horizontal heights allows the field of view of the 2D camera and the 3D line laser camera to cover different spatial areas, reducing blind spots in detection. The fields of view at different heights are complementary. At the same time, since the images acquired by the cameras at different horizontal heights have different depth information, they provide detection images from different perspectives, which helps to ensure detection accuracy.

[0019] 3. The camera calibration block is located within the field of view of the 2D camera and the 3D line laser camera. The camera calibration block includes a central calibration part and two side calibration parts on both sides. The central calibration part includes a left stepped part and a right stepped part symmetrically arranged thereto. The central calibration part and the side calibration parts are marked with corresponding size parameters, providing clear size references for the camera. At the same time, the symmetrical arrangement of the left stepped part and the right stepped part makes the calibration features observed by the camera from different angles have better symmetry and consistency, which helps to improve the accuracy and reliability of camera measurement. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 For the present utility model Figure 1 Enlarged view of point A;

[0023] Figure 3 This is a schematic diagram of the mounting bracket arrangement of this utility model;

[0024] Figure 4 This is a schematic diagram of the arrangement of the 2D camera of this utility model;

[0025] Figure 5 This is a schematic diagram of the camera calibration block of this utility model;

[0026] Explanation of key figure labels:

[0027] 1. Gantry frame; 10. Column; 11. Horizontal beam; 12. Diagonal brace; 13. Inspection station; 14. Mounting bracket; 15. Industrial barcode scanner; 2. X-axis linear module; 20. First cable protection drag chain; 3. Slide rail; 4. Mounting bracket; 40. Second cable protection drag chain; 41. Connecting horizontal plate; 42. Support plate; 43. Front vertical plate; 44. Drag chain mounting plate; 45. First connector mounting plate; 5. Y-axis linear module; 50. Module 51. Mounting plate for the first assembly; 6. Mounting plate for the second connector; 7. Z-axis linear module; 8. Lifting mounting plate; 9. Vertical mounting plate; 10. Transition mounting plate; 11. Transition pad; 12. Screw slide; 13. Camera mounting plate; 14. Mounting sheet metal parts; 15. Light source mounting plate; 26. Ring light source; 37. 3D line laser camera; 48. 2D camera; 59. Camera calibration block; 10. Side calibration section; 11. Left stepped section; 12. Right stepped section. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0030] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0031] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0032] In the claims, description and accompanying drawings of this utility model, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0033] See the example. Figure 1-5 :

[0034] A battery module welding inspection device includes two parallel gantry frames 1. An X-axis linear module 2 and a slide rail 3 are respectively arranged on the two gantry frames 1. A mounting frame 4 connects the slide table of the X-axis linear module 2 and the slider of the slide rail 3. A Y-axis linear module 5 is arranged on the mounting frame 4. A Z-axis linear module 6 is mounted on the Y-axis linear module 5. A lifting mounting plate 60 is arranged on the Z-axis linear module 6. A 3D line laser camera 7 and a 2D camera 8 are arranged on the lifting mounting plate 60. The 3D line laser camera 7 and the 2D camera 8 are used for welding inspection of the battery module welding points, capturing and acquiring inspection images of the battery module welding points. It is understood that the X-axis linear module 2, Y-axis linear module 5, Z-axis linear module 6, 3D line laser camera 7, and 2D camera 8 are all electrically connected to a PLC device.

[0035] A vertical mounting plate 61 is installed on the lower end of one side of the lifting mounting plate 60, and a 3D line laser camera 7 is arranged on the vertical mounting plate 61.

[0036] A transition mounting plate 62 is arranged on the other side of the lifting mounting plate 60. A transition pad 63 is installed on the transition mounting plate 62, and a lead screw slide 64 is vertically installed on the transition pad 63. A 2D camera 8 is installed on the worktable of the lead screw slide 64 through a camera mounting plate 65. The lead screw slide 64 is used to adjust the vertical position of the 2D camera 8, which helps to flexibly adjust the detection image acquisition range of the 2D camera 8. The 3D line laser camera 7 and the 2D camera 8 are located at different horizontal heights. The arrangement at different horizontal heights allows the camera fields of view of the 2D camera 8 and the 3D line laser camera 7 to cover different spatial areas, reducing detection blind spots. The fields of view at different heights are complementary. At the same time, since the images acquired by the cameras at different horizontal heights have different depth information, they provide detection images from different perspectives, which helps to ensure detection accuracy.

[0037] In one embodiment, a mounting sheet metal part 66 is connected to the outer side of the camera mounting plate 65. A light source mounting plate 67 is vertically arranged at the lower end of the mounting sheet metal part. The light source mounting plate 67 has an opening facing the lens of the 2D camera 8. Several mounting holes for mounting the camera light source are arranged around the opening. Preferably, the camera light source is a ring light source 68. The ring light source 68 provides uniform illumination for the welding points of the battery module to be inspected, so that the 2D camera 8 can acquire high-quality images.

[0038] In one implementation, the 3D line laser camera 7 is a three-dimensional laser profile measuring instrument, the 2D camera 88 is a 2D line scan camera, and the lead screw slide 64 is a manual slide.

[0039] In one implementation, the 3D line laser camera 7 is positioned at a lower horizontal height than the 2D camera 8, and the distance between the 2D camera 8 and the lifting mounting plate 60 is greater than the distance between the 3D line laser camera 7 and the lifting mounting plate 60. This allows the camera fields of view of the 2D camera 8 and the 3D line laser camera 7 to cover different spatial areas, which helps to reduce detection blind spots.

[0040] In one implementation, the lens of the 2D camera 8 is positioned higher than the lens of the 3D line laser camera 7. Preferably, the lens of the 2D camera 8 is 5-100mm higher than the top surface of the 3D line laser camera 7, and the distance between the 3D line laser camera 7 and the battery module is at least twice the distance between the lens height of the 2D camera 8 and the lens height of the 3D line laser camera 7.

[0041] A camera calibration block 9 is disposed below the Y-axis linear module 5. The camera calibration block 9 includes a central calibration part and two side calibration parts 90 on both sides. The central calibration part includes a left stepped part 91 and a right stepped part 92 symmetrically arranged thereon. The side calibration parts 90 are provided with several calibration holes. The central calibration part and the side calibration parts 90 provide clear dimensional references. At the same time, the symmetrical arrangement of the left stepped part 91 and the right stepped part 92 provides rich calibration information for the camera, which helps to improve the accuracy and reliability of camera measurement. It can be understood that the camera calibration block 9 is located within the field of view of the 2D camera 8 and the 3D line laser camera 7, and both the left stepped part 91 and the right stepped part 92 are provided with several steps.

[0042] In one embodiment, the left step portion 91 and the right step portion 92 are marked with corresponding step size parameters. The step size parameters include the step width and the step height difference between the step and the step above it. The side calibration portion 90 is marked with corresponding calibration hole size parameters. The calibration hole size parameters include the hole diameter. Preferably, the calibration holes are divided into two columns, and the spacing between calibration holes in the same column is the same.

[0043] In one embodiment, a first cable protection drag chain 20 is mounted on the upper side of the X-axis linear module 2, a second cable protection drag chain 40 is mounted on the top of the mounting frame 4, and the Y-axis linear module 5 is arranged on the front side of the mounting frame 4.

[0044] In one embodiment, the mounting frame 4 includes a connecting horizontal plate 41. The bottom ends of the connecting horizontal plate 41 are respectively connected to the slide table of the X-axis linear module 2 and the slider of the slide rail 3. A plurality of support plates 42 are provided on the connecting horizontal plate 41. A front vertical plate 43 is provided at the front end of the support plate 42. The bottom of the front vertical plate 43 is connected to the front end of the connecting horizontal plate 41. The Y-axis linear module 5 is installed on the front vertical plate 43. A cable chain mounting plate 44 is provided on the top of the support plate 42. A second cable protection cable chain 40 is arranged on the cable chain mounting plate 44.

[0045] A first connector mounting plate 45 is installed on the rear side of the front vertical plate 43 near the X-axis linear module 2. A module mounting plate 50 is installed on the slide of the Y-axis linear module 5. A Z-axis linear module 6 is arranged on the front of the module mounting plate 50. A second connector mounting plate 51 is installed on the upper back of the module mounting plate 50. The moving end of the first cable protection drag chain 20 is connected to the first connector mounting plate 45 through a corresponding drag chain connector. The moving end of the second cable protection drag chain 40 is connected to the second connector mounting plate 51 through a corresponding drag chain connector. The fixed end of the second cable protection drag chain 40 is installed on the drag chain mounting plate 44 through a corresponding connector bracket. It can be understood that the moving end of the first cable protection drag chain 20 and the first connector mounting plate 45, the moving end of the second cable protection drag chain 40 and the second connector mounting plate 51, and the fixed end of the second cable protection drag chain 40 and the drag chain mounting plate 44 are all connected by screws.

[0046] In one embodiment, the gantry frame 1 includes two uprights 10, with a crossbeam 11 connecting the two uprights 10. A diagonal brace 12 is provided at the angle between the crossbeam 11 and the uprights 10. A testing station 13 for placing battery modules is provided between the two gantry frames 1. A mounting bracket 14 is arranged on the upright 10 of any gantry frame 1, and an industrial barcode scanner 15 is mounted on the mounting bracket 14, facing the testing station 13. It is understood that the industrial barcode scanner 15 and the mounting bracket 14, as well as the upright 10 and the mounting bracket 14, are connected by screws.

[0047] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A battery module weld inspection apparatus, characterized by: It includes two parallel gantry frames (1), on which X-axis linear modules (2) and slide rails (3) are respectively arranged. A mounting frame (4) connects the slide table of the X-axis linear module (2) and the slider of the slide rail (3). A Y-axis linear module (5) is arranged on the mounting frame (4). A Z-axis linear module (6) is installed on the Y-axis linear module (5). A lifting mounting plate (60) is arranged on the Z-axis linear module (6). A 3D line laser camera (7) is arranged on one side of the lifting mounting plate (60). A transition mounting plate (62) is arranged on the other side of the lifting mounting plate (60). The mounting plate (62) is equipped with a transition pad (63), and a lead screw slide (64) is mounted on the transition pad (63). The worktable of the lead screw slide (64) is mounted with a 2D camera (8) through the camera mounting plate (65). The 3D line laser camera (7) and the 2D camera (8) are located at different horizontal heights. A camera calibration block (9) is set below the Y-axis linear module (5). The camera calibration block (9) includes a central calibration part and side calibration parts (90) on both sides. The central calibration part includes a left stepped part (91) and a right stepped part (92) symmetrically arranged therewith. The side calibration parts (90) are provided with several calibration holes.

2. The battery module weld inspection apparatus of claim 1, wherein: The 3D line laser camera (7) is positioned at a lower horizontal height than the 2D camera (8), and the distance between the 2D camera (8) and the lifting mounting plate (60) is greater than the distance between the 3D line laser camera (7) and the lifting mounting plate (60).

3. The battery module weld inspection apparatus of claim 2, wherein: The lower end of the lifting mounting plate (60) is equipped with a vertical mounting plate (61), and the 3D line laser camera (7) is mounted on the vertical mounting plate (61).

4. The battery module weld inspection apparatus of claim 1, wherein: The camera mounting plate (65) is connected to a mounting sheet metal part (66) on the outside. A light source mounting plate (67) is vertically attached to the lower end of the mounting sheet metal part (66). The light source mounting plate (67) has an opening facing the lens of the 2D camera (8). Several mounting holes for mounting the camera light source are arranged around the opening.

5. The battery module weld inspection apparatus of claim 1, wherein: The X-axis linear module (2) is equipped with a first cable protection drag chain (20) on its upper side, and the mounting frame (4) is equipped with a second cable protection drag chain (40) on its top. The Y-axis linear module (5) is arranged on the front side of the mounting frame (4).

6. The battery module welding inspection device according to claim 5, characterized in that: The mounting bracket (4) includes a connecting horizontal plate (41), a plurality of support plates (42) are provided on the connecting horizontal plate (41), a front vertical plate (43) is provided at the front end of the support plate (42), a drag chain mounting plate (44) is provided at the top of the support plate (42), and the Y-axis linear module (5) is mounted on the front vertical plate (43).

7. The battery module welding inspection device according to claim 1, characterized in that: The gantry (1) includes two columns (10), and a crossbeam (11) is connected between the two columns (10). A diagonal brace (12) is provided at the angle between the crossbeam (11) and the column (10). A testing station (13) for placing battery modules is provided between the two gantry (1). An installation bracket (14) is arranged on the column (10) of any gantry (1). An industrial barcode scanner (15) is provided on the installation bracket (14). The industrial barcode scanner (15) faces the testing station (13).

8. The battery module weld inspection apparatus of claim 1, wherein: The left step section (91) and the right step section (92) are marked with step size parameters on each step, and the side calibration section (90) is marked with the size parameters of the corresponding calibration holes.

9. The battery module weld inspection apparatus of any of claims 1-8, wherein: The lens of the 2D camera (8) is positioned higher than that of the 3D line laser camera (7).

10. The battery module weld inspection apparatus of claim 9, wherein: The lens of the 2D camera (8) is positioned 5-100mm higher than the top surface of the 3D line laser camera (7).

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