Semi-automatic detection device for welding seam of cylindrical battery cell

Abstract

The utility model discloses a semi-automatic detection device for a welding seam of a cylindrical battery cell, which relates to the field of visual detection equipment and comprises a rotary carrying assembly, and a plane visual detection assembly, a front three-dimensional visual detection assembly and a back three-dimensional visual detection assembly are sequentially arranged around the rotary carrying assembly. The rotary carrying assembly comprises a rotary disc, the rotary disc is arranged on the rack in an intermittent horizontal rotating mode, and a plurality of first clamping mechanisms can move up and down through a first lifting mechanism and are arranged on the edge of the rotary disc at intervals. According to the utility model, the cylindrical battery cell is clamped and fixed by the first clamping mechanism, and the cylindrical battery cell is carried among the plane visual inspection assembly, the front three-dimensional visual inspection assembly and the back three-dimensional visual inspection assembly by virtue of the rotation of the turntable, so that the front and back surfaces of the cylindrical battery cell are visually inspected, and the cylindrical battery cell visual inspection device has the advantages of high automation, high efficiency and the like.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection equipment, specifically a semi-automatic inspection device for weld seams of cylindrical battery cells. Background Technology

[0002] Cylindrical cells are one of the main components of batteries. With the current trend towards new energy sources, the requirements for products are becoming increasingly stringent, including high precision requirements. Among these requirements, weld inspection of cylindrical cells is a crucial aspect of product quality control, and the numerous types of weld defects make inspection challenging. Currently, weld inspection of cylindrical cells is mostly done manually, which is extremely labor-intensive, time-consuming, inefficient, and susceptible to significant human error, making controllable. Therefore, it is necessary to design an automated inspection device for cylindrical cell welds to improve inspection efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a semi-automatic inspection device for weld seams of cylindrical battery cells, which aims to overcome the problems existing in the prior art.

[0004] To achieve this objective, the present invention provides the following technical solution:

[0005] A semi-automatic inspection device for weld seams of cylindrical battery cells includes a frame. A rotating conveying assembly is provided on the worktable of the frame. A planar vision inspection assembly, a frontal 3D vision inspection assembly, and a rear 3D vision assembly are sequentially arranged around the rotating conveying assembly on the worktable. The rotating conveying assembly includes a turntable, several first clamping mechanisms, and several first lifting mechanisms. The turntable is intermittently and horizontally rotatable on the frame. The several first clamping mechanisms are vertically movable via the first lifting mechanisms and are spaced apart on the edge of the turntable. The first clamping mechanisms are used to clamp the cylindrical battery cells and, with the aid of the turntable's rotation, move the cylindrical battery cells between the planar vision inspection assembly, the frontal 3D vision inspection assembly, and the rear 3D vision assembly.

[0006] Furthermore, the aforementioned planar vision inspection component includes a second lifting mechanism, a first camera, and a second camera. The first camera is movable up and down on the worktable via the second lifting mechanism and is used to vertically photograph the front of the cylindrical battery cell clamped by the first clamping mechanism from top to bottom. The second camera is fixed on the worktable and is used to vertically photograph the back of the cylindrical battery cell clamped by the first clamping mechanism from bottom to top.

[0007] Furthermore, the aforementioned planar vision inspection component also includes a fourth mounting bracket and a second light source. The fourth mounting bracket is fixed to the worktable and includes a base and two mounting arms. The second camera is fixedly mounted on the base, and the two ends of the second light source are fixedly mounted on the upper ends of the two mounting arms, with the second light source positioned above the second camera. After the fourth mounting bracket is fixed to the worktable, the main body of the second camera is located below the worktable, while the lens assembly is located between the two mounting arms and above the worktable.

[0008] Furthermore, the aforementioned frontal 3D vision inspection component includes a first 3D inspection instrument and a first mounting bracket. The first 3D inspection instrument is fixed to the workbench via the first mounting bracket and is used to photograph the back of the cylindrical battery cell clamped by the first clamping mechanism from bottom to top.

[0009] Furthermore, the aforementioned rear-side 3D vision component includes a first rotating mechanism, a second clamping mechanism, a second 3D inspection instrument, a third lifting mechanism, and a third mounting frame. The second clamping mechanism is horizontally rotatable on the frame via the first rotating mechanism. The second clamping mechanism is used to clamp the cylindrical battery cell and rotate the cylindrical battery cell horizontally with the aid of the first rotating mechanism. The third mounting frame is vertically movable on the worktable via the third lifting mechanism. The second 3D inspection instrument is vertically rotatable on the third mounting frame via the second rotating mechanism. The second 3D inspection instrument is located above the second clamping mechanism, and with the aid of the rotation of the second rotating mechanism, the second 3D inspection instrument rotates around the cylindrical battery cell clamped by the second clamping mechanism.

[0010] Furthermore, the aforementioned workbench is also equipped with a loading component and a unloading component. The loading component, planar vision inspection component, front 3D vision inspection component, rear 3D vision component, and unloading component are arranged sequentially around the rotating conveying component.

[0011] Furthermore, both the feeding and unloading components include a belt conveyor and several cups for placing cylindrical battery cells, with the belts of the belt conveyor arranged at intervals to hold the cups.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] This invention features a rotary conveying assembly, around which are arranged a planar vision inspection assembly, a front 3D vision inspection assembly, and a rear 3D vision assembly. The rotary conveying assembly includes a turntable, which is intermittently and horizontally rotatable on a frame. Several first clamping mechanisms are vertically movable via a first lifting mechanism and are spaced apart along the edge of the turntable. In this invention, the first clamping mechanisms clamp the cylindrical battery cell, and the rotation of the turntable moves the cylindrical battery cell between the planar vision inspection assembly, the front 3D vision inspection assembly, and the rear 3D vision assembly, thereby performing visual inspection of the front and back of the cylindrical battery cell. This invention offers advantages such as high automation and high efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of the entire machine of this utility model.

[0015] Figure 2 This is a three-dimensional view of the internal structure of this utility model.

[0016] Figure 3 for Figure 2 Top view.

[0017] Figure 4 This is a perspective view of the feeding component in this utility model.

[0018] Figure 5 This is a perspective view of the rotating conveying component in this utility model.

[0019] Figure 6 This is a perspective view of the planar vision inspection component in this utility model.

[0020] Figure 7 This is a stereoscopic view of the planar vision inspection component after assembly, taken from another perspective, in this utility model.

[0021] Figure 8 This is a perspective view of the frontal three-dimensional vision inspection component in this utility model.

[0022] Figure 9 This is a perspective view of the three-dimensional vision component on the back side in this utility model. Detailed Implementation

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Many details are described below to provide a comprehensive understanding of this utility model; however, those skilled in the art can implement this utility model without these details.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, a semi-automatic inspection device for weld seams of cylindrical battery cells includes a frame 1. The worktable 10 of the frame 1 is provided with a rotary conveying component 5. The worktable 10 is arranged around the rotary conveying component 5 with a feeding component 4, a planar vision inspection component 6, a front three-dimensional vision inspection component 7, a back three-dimensional vision component 8, and a unloading component 9 in sequence.

[0025] Preferably, the frame 1 is provided with a protective cover 11, and the feeding component 4, the planar vision inspection component 6, the front three-dimensional vision inspection component 7, the rear three-dimensional vision component 8 and the unloading component 9 are located inside the protective cover 11.

[0026] The rotary conveying assembly 5 is used to transport cylindrical battery cells between the feeding assembly 4, the planar vision inspection assembly 6, the front three-dimensional vision inspection assembly 7, the back three-dimensional vision assembly 8, and the unloading assembly 9, thereby realizing the process connection between the various components.

[0027] The components will now be described in detail in the order of their assembly processes.

[0028] like Figures 1-4 As shown, the feeding assembly 3 includes a belt conveyor 31 and several cups 32 for placing cylindrical battery cells a. The belt of the belt conveyor is spaced apart from each other, and the cups 32 are arranged in a cylindrical shape with a closed lower end. The inner diameter of each cup is matched to the outer diameter of the cylindrical battery cell a. The upstream end of the feeding assembly 3 is located outside the protective cover 11 for easy feeding. The downstream end of the feeding assembly 3 is located inside the protective cover 11 and is connected to the rotary conveying assembly 5. After the cylindrical battery cell a is placed in the cup 32, more than half of it extends upwards outside the cup 32, allowing the rotary conveying assembly 5 to remove it.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the rotary conveying assembly 5 includes a base 51, an electric rotary table 52, a turntable 53, and several first clamping mechanisms 55. The turntable 53 is intermittently and horizontally rotatable on the worktable surface 10. Specifically, the base 51 is fixedly located at the middle position of the worktable surface 10, and the electric rotary table 52 is fixedly mounted on the base 51. The turntable 53 is fixedly mounted on the rotating platform of the electric rotary table 52.

[0030] like Figures 1 to 5 As shown, several first clamping mechanisms 55 can move the edge of the turntable 53 up and down via a first lifting mechanism 54, and the several first clamping mechanisms 55 are arranged at intervals between each other. The first clamping mechanisms 55 are used to clamp the cylindrical battery cell a, and transport the cylindrical battery cell between the feeding assembly 4, the planar vision inspection assembly 6, the front three-dimensional vision inspection assembly 7, the back three-dimensional vision assembly 8 and the unloading assembly 9 by means of the rotation of the turntable 53.

[0031] like Figure 2 , Figure 3 and Figure 5 As shown, preferably, the first clamping mechanism 55 is a two-jaw clamping cylinder, and the first lifting mechanism 54 is a lifting cylinder. The number of these mechanisms includes, but is not limited to, six. The two-jaw clamping cylinder and the lifting cylinder are equipped with a pneumatic regulating cabinet 57 in the middle position of the turntable 53.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the planar vision inspection component 6 is divided into upper and lower parts. The upper part includes a second lifting mechanism 61, a first camera 62, and a first light source 63. The first camera 62 is vertically movable on the worktable 10 via the second lifting mechanism 61, and is equipped with the first light source 63. In use, the first camera 62 vertically photographs the front of the cylindrical battery cell clamped by the first clamping mechanism 55 from top to bottom. The lower part includes a second camera 65 and a second light source 66. The second camera 65 is fixed on the worktable 10 and is equipped with the second light source 66. In use, the second camera 65 vertically photographs the back of the cylindrical battery cell clamped by the first clamping mechanism 55 from bottom to top.

[0033] like Figure 6 and Figure 7 As shown, preferably, the lower part of the planar vision inspection assembly 6 further includes a fourth mounting bracket 64, which is fixed to the worktable 10. The fourth mounting bracket 64 has a fixed base 641, on which the second camera 65 is fixedly mounted. The fourth mounting bracket 64 has two mounting arms 642, and the two ends of the second light source 66 are fixedly mounted on the upper ends of the two mounting arms 642, with the second light source 66 positioned above the second camera 65. After the lower part of the planar vision inspection assembly 6 is assembled onto the worktable 10, the main body of the second camera 65 is located below the worktable 10 for protection, while the lens assembly 651 of the second camera 65 is located between the two mounting arms 642 and above the worktable 10 for easy replacement. Simultaneously, the second light source 66 and the two mounting arms 642 are also located above the worktable 10 for easy replacement of the second light source 66.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 8As shown, the frontal 3D vision inspection component 7 includes a first 3D inspection instrument 72 and a first mounting bracket 71. The first 3D inspection instrument 72 can be fixed to the worktable 10 via the first mounting bracket 71. The first 3D inspection instrument 72 is used to photograph the back of the cylindrical battery cell clamped by the first clamping mechanism from bottom to top. The first 3D inspection instrument 72 is a conventional 3D inspection instrument.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 9 As shown, the rear-side 3D vision component 8 is divided into upper and lower parts. The lower part includes a second mounting bracket 85, a first rotating mechanism 86, and a second clamping mechanism 87. The second clamping mechanism 87 is horizontally rotatable on the frame 1 via the first rotating mechanism 86. Specifically, the first rotating mechanism 86 is an existing hollow electric rotary table, the specific structure of which will not be described in detail. The first rotating mechanism 86 is fixed to the frame 1 via the second mounting bracket 85, and the main body of the first rotating mechanism 86 is located below the worktable 1, while the rotating stage 861 of the first rotating mechanism 86 is located above the worktable 1 and is fixedly mounted with the second clamping mechanism 87. The second clamping mechanism 87 is used to clamp the lower end of the cylindrical battery cell, transfer the cylindrical battery cell from the first clamping mechanism 55 to the second clamping mechanism 87, and rotate the cylindrical battery cell horizontally with the aid of the first rotating mechanism 86. The second clamping mechanism 87 includes, but is not limited to, a three-jaw clamping cylinder.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 9 As shown, the upper part of the rear-side 3D vision assembly 8 includes a third lifting mechanism 81, a third mounting bracket 82, a second rotating mechanism 83, and a second 3D inspection instrument 84. The third mounting bracket 82 is vertically movable on the worktable 10 via the third lifting mechanism 81. The second 3D inspection instrument 84 is rotatably mounted on the third mounting bracket 82 via the second rotating mechanism 83. After assembly, the second 3D inspection instrument 84 is located above the second clamping mechanism 87. With the help of the rotation of the second rotating mechanism 83, the second 3D inspection instrument 84 rotates around the cylindrical battery cell clamped by the second clamping mechanism 87.

[0037] Specifically, the second rotating mechanism 83 includes a drive motor 831 and a rotating frame 831. The drive motor 831 is horizontally fixed to the third mounting frame 82, and the output shaft of the drive motor 831 is fixed to the rotating frame 831. The second three-dimensional detection instrument 84 is fixed to the rotating frame 831.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the structure of the unloading assembly 9 is the same as that of the loading assembly 4, and will not be described again here. The upstream end of the unloading assembly 9 is located inside the protective cover 11 and is connected to the rotary conveying assembly 5 in the process. The downstream end of the unloading assembly 9 is located outside the protective cover 11, which facilitates the removal of the cylindrical battery cell.

[0039] like Figure 1 and Figure 2 As shown, in addition, the workbench 10 is also equipped with a barcode scanner 3 and several control buttons 13. The protective cover 11 is also equipped with a touch screen 12. The touch screen 12 is mainly used to display detection information and set the detection device. The control buttons 13 are mainly used to start or stop the detection device.

[0040] like Figure 1 and Figure 2 As shown, preferably, the unloading component 9 and the loading component 4 are arranged in a figure-eight pattern on the workbench 10, with the barcode scanner 3, control button 13 and touch screen 12 located in the middle of the two, making it convenient for staff to operate the testing device.

[0041] like Figures 1 to 9 As shown, the working principle of this utility model is roughly as follows:

[0042] To facilitate understanding of the working principle, it should be noted that: One end of cylindrical cell a, commonly referred to as the front side, has a positive conductive plate. This positive conductive plate is a small-diameter metal sheet with a groove only in its center. The groove serves as the welding point for positive electrode penetration welding. Therefore, the number of welding positions to be inspected on the front side of cylindrical cell a is narrow. The other end of cylindrical cell a, commonly referred to as the back side, has a negative conductive plate. This negative conductive plate is a large-diameter metal sheet. A curved trajectory is used for negative electrode penetration welding, and this curved trajectory is close to and along the edge of the negative conductive plate. Simultaneously, a capping welding is performed along the edge of the negative conductive plate. Therefore, the number of welding positions to be inspected on the back side of cylindrical cell a is large and widely distributed.

[0043] (1) After the staff scans the cylindrical cell a with the barcode scanner 3, they place it into the loading assembly 4 with the front of the cylindrical cell a facing down and the back facing up. The staff presses the start button of the control button 13, and the loading assembly 4 transports several cylindrical cells a one by one into the inside of the protective cover 11;

[0044] (2) The cylindrical battery cell a is transferred from the feeding assembly 4 to the rotary conveying assembly 5 by the first clamping mechanism 55;

[0045] (3) By rotating the turntable 53, the cylindrical cell a is moved to the positions of the planar vision inspection component 6, the front three-dimensional vision inspection component 7 and the back three-dimensional vision component 8.

[0046] First, the planar vision inspection component 6 takes planar vision pictures of the front and back of the cylindrical cell a.

[0047] Then, the front three-dimensional vision inspection component 7 takes a three-dimensional vision picture of the weld seam of the positive electrode penetration welding on the front of the cylindrical cell a.

[0048] Then, the rear-side 3D vision component 8 takes a 3D visual image of the front of the cylindrical cell a. Specifically, the second clamping mechanism 87 clamps the front end (i.e., the lower end) of the cylindrical cell a and releases the first clamping mechanism 55; the second rotation mechanism 83 adjusts the posture of the second 3D inspection instrument 84 so that the second 3D inspection instrument 84 is, but not limited to, vertically downward, and the first rotation mechanism 86 rotates the cylindrical cell a 360° in the horizontal direction; during the rotation, the second 3D inspection instrument 84 takes a 3D visual image of the weld seam of the negative electrode penetration welding on the back of the cylindrical cell a; the second rotation mechanism 83 adjusts the posture of the second 3D inspection instrument 84 again so that the second 3D inspection instrument 84 is, but not limited to, tilted at 45° downward towards the center of the cylindrical cell, and the first rotation mechanism 86 rotates the cylindrical cell a 360° in the horizontal direction; during the rotation, the second 3D inspection instrument 84 takes a 3D visual image of the weld seam of the cover welding on the back of the cylindrical cell a.

[0049] The host computer of the detection device uses existing image processing technology to detect and analyze the welds captured by each detection component and provides the detection results. Among them, the planar vision detection component 6 is mainly used to detect and analyze whether there are weld defects such as dimensional deviations and positional offsets, while the front three-dimensional vision detection component 7 and the rear three-dimensional vision component 8 are mainly used to detect whether there are weld defects such as weld burn-through, pinholes, and bursts.

[0050] (4) Release the second clamping mechanism 87 and re-clamp the cylindrical cell a by the first clamping mechanism 55;

[0051] (5) The first clamping mechanism 55 transfers the inspected cylindrical cell a to the unloading assembly 9;

[0052] (6) The cylindrical battery cell a that has been tested is transported by the unloading component 9 to the outside of the protective cover 11, and the staff can pick out the cylindrical battery cell a according to the test results.

[0053] This is merely a specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be considered as an infringement of the protection scope of the present utility model.

Claims

1. A cylindrical cell weld semi-automatic inspection apparatus, characterized by: The machine frame is provided with a workbench surface, and the workbench surface is provided with a rotating conveying assembly in sequence from top to bottom, a plane visual inspection assembly, a front three-dimensional visual inspection assembly and a back three-dimensional visual inspection assembly. The rotating conveying assembly comprises a rotating disc, a plurality of first clamping mechanisms and a plurality of first lifting mechanisms, the rotating disc is intermittently horizontally rotatable arranged on the machine frame, the first clamping mechanisms are movably arranged on the edge of the rotating disc by the first lifting mechanisms, and the first clamping mechanisms are used for clamping the cylindrical battery cell and conveying the cylindrical battery cell between the plane visual inspection assembly, the front three-dimensional visual inspection assembly and the back three-dimensional visual inspection assembly by the rotation of the rotating disc.

2. The cylindrical battery cell weld seam semi-automatic detection device according to claim 1, characterized in that: The plane visual inspection assembly comprises a second lifting mechanism, a first camera and a second camera, the first camera is movably arranged on the workbench surface by the second lifting mechanism, and is used for vertically shooting the front of the cylindrical battery cell clamped by the first clamping mechanism from top to bottom; and the second camera is fixedly arranged on the workbench surface, and is used for vertically shooting the back of the cylindrical battery cell clamped by the first clamping mechanism from bottom to top.

3. The cylindrical battery cell weld seam semi-automatic detection device according to claim 2, characterized in that: The plane visual inspection assembly further comprises a fourth mounting frame and a second light source, the fourth mounting frame is fixedly arranged on the workbench surface, the fourth mounting frame is fixedly provided with a fixing seat and two mounting arms, the second camera is fixedly arranged on the fixing seat, and the two ends of the second light source are fixedly arranged on the upper ends of the two mounting arms and located above the second camera; after the fourth mounting frame is fixedly arranged on the workbench surface, the main body part of the second camera is located below the workbench surface, and the lens assembly is located between the two mounting arms and above the workbench surface.

4. The cylindrical battery cell weld seam semi-automatic detection device according to claim 1, characterized in that: The front three-dimensional visual inspection assembly comprises a first three-dimensional detection instrument and a first mounting frame, the first three-dimensional detection instrument is fixedly arranged on the workbench surface by the first mounting frame, and is used for shooting the back of the cylindrical battery cell clamped by the first clamping mechanism from bottom to top.

5. The cylindrical cell weld semi-automatic detection device according to claim 1, characterized in that: The back three-dimensional visual inspection assembly comprises a first rotating mechanism, a second clamping mechanism, a second three-dimensional detection instrument, a third lifting mechanism, a second rotating mechanism and a third mounting frame; The second clamping mechanism is horizontally rotatable arranged on the machine frame by the first rotating mechanism, and is used for clamping the cylindrical battery cell and horizontally rotating the cylindrical battery cell by the first rotating mechanism; The third mounting frame is movably arranged on the workbench surface by the third lifting mechanism, and the second three-dimensional detection instrument is rotatable arranged on the third mounting frame by the second rotating mechanism; the second three-dimensional detection instrument is located above the second clamping mechanism, and rotates around the cylindrical battery cell clamped by the second clamping mechanism by the rotation of the second rotating mechanism.

6. The cylindrical battery cell weld seam semi-automatic detection device according to any one of claims 1-5, characterized in that: The workbench surface is further provided with a feeding assembly and a discharging assembly, and the feeding assembly, the plane visual inspection assembly, the front three-dimensional visual inspection assembly, the back three-dimensional visual inspection assembly and the discharging assembly are sequentially arranged around the rotating conveying assembly.

7. The cylindrical cell weld seam semi-automatic detection device according to claim 6, characterized in that: The feeding assembly and the discharging assembly both comprise a belt conveyor and a plurality of cup holders for placing the cylindrical battery cell, and the belt of the belt conveyor is provided with a plurality of the cup holders arranged at intervals.

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