Battery shell defect detection device and detection method

Abstract

The invention relates to the technical field of battery detection, in particular to a battery shell defect detection device and method, and the device comprises a supporting plate, a rotating shaft, a conveying belt, an intermittent motor, an execution unit and a fixing unit. According to the invention, the following problems existing in the process of detecting the battery shell in the prior art can be solved: unevenness of the side wall of the battery shell is difficult to identify, so that the shell with unqualified flatness is poor in strength, the performance and the service life of the battery are influenced, and even potential safety hazards exist; the inner wall of the battery cannot be detected, and comprehensive detection cannot be realized; the external camera is used for shooting the top and the peripheral outer wall of the battery shell from top to bottom, so that visual defects and unevenness of the battery shell can be quickly detected; while the outer side wall of the battery shell is detected, the inner side wall of the battery shell is comprehensively detected through the built-in camera, and the detection effect of the battery shell is ensured.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and in particular to a battery casing defect detection device and method. Background Technology

[0002] With increasing environmental awareness and the promotion of sustainable development concepts, bio-based plastics are being used more and more widely in the field of battery casing manufacturing, gradually becoming an ideal alternative to traditional plastic battery casings. Since the quality of the battery casing is closely related to the performance of the battery, it is necessary to conduct necessary tests on the battery casing in order to ensure the safety and lifespan of the battery. Detecting visual defects in battery casings has many important implications.

[0003] If there are defects such as cracks or scratches on the surface of the battery casing, the internal pressure will change during the charging and discharging process, which will cause the defects to expand further, affecting the structural strength of the battery casing and the normal charging and discharging of the battery.

[0004] Existing technologies also disclose a large number of devices for detecting visual defects in battery casings. For example, Chinese Patent No. CN215985795U discloses a rapid detection method for visual defects in square power battery casings, including a base, a placement device for placing the battery, a camera detection device for detecting the battery, and a moving device for transporting the battery. The base is provided with two support platforms, and the camera detection devices are symmetrically arranged on the two support platforms. In use, the aforementioned prior art allows for simultaneous detection of both sides of the battery via camera detection devices mounted on both sides of the placement device. Furthermore, the placement device can rotate the battery, changing its angle so that one camera detection device can detect the other two surfaces of the battery. The moving device is used to deliver the battery after detection.

[0005] However, the following shortcomings exist in using the existing technology to inspect the battery casing: 1. Although the existing technologies mentioned above can detect visual defects in battery casings, the sidewalls of square battery casings are prone to unevenness, and it is difficult for cameras to identify the unevenness of the sidewalls of battery casings. Therefore, battery casings with unsatisfactory flatness not only have poor strength, but also cannot fit well with the heat dissipation device of the battery inside, forming air gaps. This prevents the heat generated by the battery during charging and discharging from being dissipated in time, causing the battery temperature to rise, affecting the battery's performance and lifespan, and even posing safety hazards.

[0006] 2. In addition, during the manufacturing process, the inner wall of the battery casing may also have defects such as scratches, dents and impurities, which also affect the structural strength of the battery casing. The existing technology mentioned above can only detect defects on the outer wall of the battery casing and cannot detect the inner wall of the battery, thus failing to achieve comprehensive inspection. As a result, battery casings with defects on the inner wall enter the market and affect the performance of the battery.

[0007] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing battery casing testing methods. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a battery casing defect detection device, comprising two parallel support plates, with a bracket at the lower end of each support plate. Multiple rotating shafts are rotatably mounted between the two support plates, and a conveyor belt is fitted onto the outer wall of each shaft. An intermittent motor, connected to any one of the rotating shafts, is mounted on the outer wall of any support plate via a motor mount. An execution unit for visual defect detection of the battery casing is mounted on the upper end of each support plate. Multiple fixing units for limiting the position of the battery casing are evenly arranged on the outer wall of the conveyor belt. The conveyor belt, in conjunction with the fixing units, stably transports the battery casing to the execution unit for visual defect detection.

[0009] As a preferred embodiment of the present invention, the execution unit includes a U-shaped frame mounted on the upper ends of two supports. The opening of the U-shaped frame is arranged downward. A connecting frame is installed on the inner wall of the corner of the vertical and horizontal sections of the U-shaped frame. Side support plates are provided on both sides of the horizontal section of the U-shaped frame along its length. An external camera for detecting defects and flatness of the outer wall of the battery casing is installed on the side of the connecting frame and the side support plates near the middle of the U-shaped frame. A controller is installed at the upper end of the horizontal section of the U-shaped frame, and the controller is electrically connected to multiple external cameras.

[0010] As a preferred embodiment of the present invention, the fixing unit includes multiple U-shaped pads installed on the outer wall of the conveyor belt. The outer wall of the conveyor belt is also equipped with multiple support groups located in the middle of the U-shaped pads. Each support group includes two mounting rods parallel to the axis of rotation. Two self-locking telescopic members are symmetrically arranged at the upper end of the mounting rods. A suction cup is installed at the end of the self-locking telescopic member away from the mounting rod. The fixing unit also includes an adsorption mechanism for improving the limiting effect on the battery casing.

[0011] As a preferred embodiment of the present invention, the self-locking telescopic component consists of a fixed section and an adjusting section, wherein the adjusting section and the fixed section are connected by a threaded connection to adjust the overall length of the self-locking telescopic component.

[0012] As a preferred embodiment of the present invention, the adsorption mechanism includes two stabilizing plates installed between two support plates. The two stabilizing plates are located below the execution unit, and an air pump is installed between the two stabilizing plates via a mounting base. Sealing hoppers that slide against the inner walls of the upper and lower sides of the conveyor belt are installed at both ends of the stabilizing plates. The air pump's suction end is connected to the upper sealing hopper, and the air pump's outlet end is connected to the lower sealing hopper.

[0013] As a preferred embodiment of the present invention, a plurality of ventilation holes are provided on the conveyor belt corresponding to the position of the sealing hopper, and the ventilation holes are connected to the sealing hopper.

[0014] As a preferred embodiment of the present invention, the two side walls of the sealing hopper away from the air pump and parallel to the axis of rotation are rotatably equipped with rubber rollers that roll in contact with the inner wall of the conveyor belt, and the two side walls of the sealing hopper away from the air pump and perpendicular to the axis of rotation are provided with rubber strips that slide in contact with the inner wall of the conveyor belt.

[0015] As a preferred embodiment of the present invention, a positioning ring is fitted at the end of the plurality of self-locking telescopic components away from the mounting rod, and a telescopic rod is rotatably mounted on the positioning ring. A horizontal plate is rotatably mounted at the end of the telescopic rod away from the positioning ring between the two mounting rods of each support group. A support column is provided on the horizontal plate, and a reset spring rod is provided between the lower end of the support column and the conveyor belt.

[0016] As a preferred embodiment of the present invention, two symmetrical grooves parallel to the axis of the support column are provided on the support column. An electric slider is provided in the groove. A rectangular sleeve is installed on the outer wall of the two electric sliders. Built-in cameras are provided on the four outer walls of the rectangular sleeve. The built-in cameras are electrically connected to the controller.

[0017] Furthermore, the present invention also provides a method for detecting defects in battery casings, comprising the following steps: S1: Starting device: First, the rotating shaft is driven by an intermittent motor to rotate and drive the conveyor belt to move intermittently, so that the conveyor belt drives the fixed unit to move intermittently in the circumferential direction; S2: Battery casing installation: Attach the battery casing to be tested to the fixing unit with the opening facing down; S3: Battery casing inspection: The conveyor belt transports the battery casing to the execution unit through the fixed unit. During this process, the execution unit performs visual defect inspection on the inner and outer walls of the battery casing.

[0018] In summary, this application includes the following beneficial technical effects: I. This invention enables an external camera to be powered on via a controller, allowing the camera to capture images of the top and four outer walls of the battery casing. The captured images are then transmitted to the controller in real time. The controller sends the images to a detection terminal for analysis, which analyzes in real time whether there are obvious visual defects on the outer walls of the battery casing. Since the external camera captures images of the battery casing from top to bottom, it can quickly identify unevenness in the battery casing. This effectively and quickly detects unevenness on the outer walls of the battery casing, ensuring that a battery casing with acceptable flatness has sufficient strength and improving its performance.

[0019] Second, this invention secures the battery casing to the outside of multiple self-locking telescopic components with the opening facing downwards, allowing multiple suction cups to adhere to the inner top wall of the battery casing, thereby ensuring the stability of the conveyor belt during the transport of the battery casing. In addition, adjusting the length of the self-locking telescopic components can adjust the distance between the suction cups and the conveyor belt according to the depth of the battery casing, thereby enabling the detection of battery casings of different depths and improving the applicability of this invention.

[0020] Third, the present invention uses an air pump to extract air from the upper sealed hopper and creates negative pressure inside the battery casing through the vent. This allows the battery casing to be fixed by the suction cup and then further fixed by negative pressure adsorption, thereby ensuring the stability of the battery casing during the detection process and preventing the execution unit from capturing blurry images due to the battery casing's lack of stability and shaking during the shooting process.

[0021] Fourth, this invention uses an external camera to visually inspect the outer wall of the battery casing for defects and flatness, while simultaneously using an electric slider to move the built-in camera up and down. This allows the built-in camera to comprehensively inspect the inner wall of the battery casing and capture the inspection images, which are then transmitted to the controller in real time. This enables simultaneous inspection of the inner and outer walls of the battery casing, ensuring the effectiveness of the inspection and preventing defects on the inner wall of the battery casing from going undetected and causing adverse effects on the battery's performance. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the execution unit of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of the fixing unit of the present invention.

[0026] Figure 4This is a schematic diagram of the structure between the U-shaped pad, the self-locking telescopic component, and the adsorption mechanism of the present invention.

[0027] Figure 5 This is the present invention. Figure 4 A magnified view of part A.

[0028] Figure 6 This is a schematic diagram of the structure between the telescopic rod, horizontal plate, support column and reset spring rod of the present invention.

[0029] Figure 7 This is the present invention. Figure 6 A magnified view of section B.

[0030] In the diagram, 1. Support plate; 2. Bracket; 3. Rotating shaft; 4. Conveyor belt; 5. Intermittent motor; 6. Execution unit; 61. U-shaped frame; 62. Connecting frame; 63. Side support plate; 64. External camera; 65. Controller; 7. Fixing unit; 71. U-shaped pad; 72. Mounting rod; 73. Self-locking telescopic component; 731. Positioning ring; 732. Telescopic rod; 733. Horizontal plate; 734. Support column; 735. Return spring rod; 736. Slide groove; 737. Electric slider; 738. Rectangular sleeve; 739. Built-in camera; 74. Suction cup; 75. Adsorption mechanism; 751. Stabilizing plate; 752. Mounting base; 753. Air pump; 754. Sealing hopper; 755. Vent hole; 756. Rubber roller; 757. Rubber strip; 8. Battery casing. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-7 The embodiments of the present invention will be described in detail below.

[0032] This application discloses a battery casing defect detection device. It should be noted that this bio-based battery casing visual defect detection device is mainly used in the process of visually detecting defects in battery casings 8. Technically, the cooperation between the conveyor belt 4, the fixing unit 7, and the execution unit 6 enables sequential defect detection of multiple battery casings 8, thereby improving detection efficiency. In particular, during the conveying of the battery casings 8, negative pressure adsorption fixation is applied to both the battery casings 8 and the device, ensuring the stability of the battery casings 8 during the detection process. This prevents blurry images caused by the battery casings 8 shaking due to instability during the image capture process by the execution unit 6. Furthermore, this bio-based battery casing visual defect detection device can also simultaneously detect the inner and outer walls of the battery casings 8, ensuring the detection effect and preventing undetected defects on the inner walls of the battery casings 8, which could negatively impact battery performance.

[0033] Reference Figure 1As shown, a battery casing defect detection device includes two parallel support plates 1. A bracket 2 is provided at the lower end of the support plate 1. Multiple rotating shafts 3 are rotatably installed between the two support plates 1. A conveyor belt 4 is sleeved on the outer wall of the multiple rotating shafts 3. An intermittent motor 5 connected to any one of the rotating shafts 3 is provided on the outer wall of any support plate 1 through a motor base. An execution unit 6 for visual defect detection of the battery casing 8 is installed at the upper end of the support plate 1. Multiple fixing units 7 for limiting the position of the battery casing 8 are evenly arranged on the outer wall of the conveyor belt 4. The battery casing 8 is stably conveyed to the execution unit 6 for visual defect detection by the cooperation of the conveyor belt 4 and the fixing units 7.

[0034] In the specific implementation process, the intermittent motor 5 is first started. The intermittent motor 5 drives the conveyor belt 4 to move through the rotating shaft 3, so that the conveyor belt 4 drives the fixed unit 7 to move intermittently in the circumferential direction. Then, the battery casing 8 to be inspected is fastened to the fixed unit 7 with the opening facing downwards, so that the conveyor belt 4 conveys the battery casing 8 to the execution unit 6 through the fixed unit 7. During this process, the execution unit 6 performs visual defect detection on the inner and outer walls of the battery casing 8. In this way, through the cooperation between the conveyor belt 4, the fixed unit 7 and the execution unit 6, multiple battery casings 8 can be inspected for defects in sequence, thereby improving the inspection efficiency.

[0035] Reference Figure 2 As shown, in order to enable rapid inspection of the battery casing 8, a corresponding execution unit 6 is provided in this embodiment. Specifically, the execution unit 6 includes a U-shaped frame 61 installed on the upper end of the two supports 2. The opening of the U-shaped frame 61 is arranged downward. A connecting frame 62 is installed on the inner wall of the corner of the vertical and horizontal sections of the U-shaped frame 61. Side support plates 63 are provided on both sides of the horizontal section of the U-shaped frame 61. An external camera 64 for detecting defects and flatness of the outer wall of the battery casing 8 is installed on the side of the connecting frame 62 and the side support plate 63 near the middle of the U-shaped frame 61. A controller 65 is installed on the upper end of the horizontal section of the U-shaped frame 61. The controller 65 is electrically connected to multiple external cameras 64. It should be noted that the controller 65 is prior art and is mainly used to collect the images captured by the external cameras 64. The working principle of the controller 65 will not be described here.

[0036] In the specific implementation process, after the conveyor belt 4 conveys the battery casing 8 to the opening of the U-shaped frame 61 through the fixing unit 7, the external camera 64 is powered on and started by the controller 65, so that the external camera 64 can take pictures of the top and the outer walls of the battery casing 8 and transmit the pictures to the controller 65 in real time. The controller 65 sends the pictures to the detection terminal, so that the detection terminal can analyze the pictures in real time to analyze whether there are obvious visual defects and unevenness on the outer walls of the battery casing 8. This ensures that the battery casing 8 with qualified flatness has sufficient strength and can improve the performance of the battery casing 8.

[0037] Reference Figure 3 and Figure 4 As shown, in order to ensure the stability of the battery casing 8 when the conveyor belt 4 transports it to the execution unit 6 for testing, it is necessary to limit and fix it on the conveyor belt 4. Based on this, a fixing unit 7 is also provided in this embodiment. Specifically, the fixing unit 7 includes multiple U-shaped pads 71 ​​installed on the outer wall of the conveyor belt 4. Multiple support groups located in the middle of the U-shaped pads 71 ​​are also installed on the outer wall of the conveyor belt 4. Each support group includes two mounting rods 72 parallel to the axis of the rotating shaft 3. Two self-locking telescopic members 73 are symmetrically arranged at the upper end of the mounting rods 72. A suction cup 74 is installed at the end of the self-locking telescopic member 73 away from the mounting rod 72. The fixing unit 7 also includes an adsorption mechanism 75 for improving the limiting effect on the battery casing 8.

[0038] It should be noted that the U-shaped pad 71 is made of rubber material that is easy to deform elastically, and can adapt to deformation as the conveyor belt 4 moves, thus avoiding interference.

[0039] Furthermore, in this embodiment, the self-locking telescopic member 73 consists of a fixed section and an adjusting section. The adjusting section and the fixed section are connected by a threaded connection to adjust the overall length of the self-locking telescopic member 73.

[0040] In the specific implementation process, the battery casing 8 is fastened to the outside of the multiple self-locking telescopic members 73 of the support assembly with its opening facing downwards, so that the multiple suction cups 74 adsorb onto the inner top wall of the battery casing 8, thereby ensuring the stability of the battery casing 8 during the conveyor belt 4's transport process; at the same time, the opening at the bottom of the battery casing 8 abuts against the U-shaped pad 71 to protect the battery casing 8 and prevent the opening of the battery casing 8 from being bumped and causing defects during the inspection process; in addition, adjusting the length of the self-locking telescopic member 73 can adjust the distance between the suction cup 74 and the conveyor belt 4 according to the depth of the battery casing 8, thereby enabling the inspection of battery casings 8 at different depths and improving the applicability of the invention; furthermore, the adsorption mechanism 75 can further improve the limiting effect on the battery casing 8 and the stability during the inspection process.

[0041] It should be noted that the adjusting section and the fixed section of the self-locking telescopic component 73 are connected by a self-locking thread, which is used to automatically lock after adjusting the length of the self-locking telescopic component 73, so as to prevent the length of the self-locking telescopic component 73 from changing arbitrarily and affecting the support effect on the battery casing 8.

[0042] Reference Figure 4 and Figure 5 As shown, in order to further improve the stability of the battery casing 8, the battery casing 8 can be further limited and fixed in this embodiment. Based on this, an adsorption mechanism 75 is provided in this embodiment. Specifically, the adsorption mechanism 75 includes two stabilizing plates 751 installed between two support plates 1. The two stabilizing plates 751 are located below the execution unit 6, and an air pump 753 is provided between the two stabilizing plates 751 through a mounting base 752. Sealing hoppers 754 that slide against the inner walls of the upper and lower sides of the conveyor belt 4 are installed at both the upper and lower ends of the stabilizing plates 751. The air pump 753's suction end is connected to the upper sealing hopper 754, and the air pump 753's outlet end is connected to the lower sealing hopper 754.

[0043] Furthermore, in this embodiment, a plurality of ventilation holes 755 are provided on the conveyor belt 4 corresponding to the position of the sealing hopper 754, and the ventilation holes 755 are connected to the sealing hopper 754.

[0044] In the specific implementation process, the rotating shaft 3 drives the conveyor belt 4 to move circumferentially. When the conveyor belt 4 moves the U-shaped pad 71, the self-locking telescopic component 73 and the battery casing 8 as a whole to the bottom of the U-shaped frame 61, the vent 755 at this point is connected to the sealing hopper 754 above. At this time, the air pump 753 is started. The air pump 753 draws out the air from the sealing hopper 754 above and creates a negative pressure inside the battery casing 8 through the vent 755. Since the bottom of the battery casing 8 is against the U-shaped pad 71, the opening at the bottom of the battery casing 8 is sealed, thus not destroying the negative pressure effect inside the battery casing 8. After the battery casing 8 is fixed by the suction cup 74, it is again fixed by negative pressure adsorption, thereby further ensuring the stability of the battery casing 8 during the detection process and preventing the execution unit 6 from shooting the battery casing 8 due to the lack of stability of the battery casing 8 causing the shooting image to be blurry.

[0045] During the inspection of the battery casing 8, the conveyor belt 4 moves the inspected battery casing 8 to the lower position. At this time, the air pump 753 discharges air into the lower sealing hopper 754, allowing the air in the lower sealing hopper 754 to be discharged into the interior of the battery casing 8, thereby relieving the negative pressure and fixing effect of the battery casing 8, causing the battery casing 8 to fall off the U-shaped pad 71. At this time, the inspected battery casing 8 can be removed.

[0046] It should be noted that, in this embodiment, the two side walls of the sealing hopper 754 away from the air pump 753 and parallel to the axis of the rotating shaft 3 are rotatably equipped with rubber rollers 756 that roll in contact with the inner wall of the conveyor belt 4, and the two side walls of the sealing hopper 754 away from the air pump 753 and perpendicular to the axis of the rotating shaft 3 are provided with rubber strips 757 that slide in contact with the inner wall of the conveyor belt 4. The rubber rollers 756 and rubber strips 757 can make the sealing hopper 754 and the inner wall of the conveyor belt 4 seal in contact, thereby preventing gaps between the sealing hopper 754 and the inner wall of the conveyor belt 4 from causing leakage when the air pump 753 draws air from the sealing hopper 754, which would affect the negative pressure effect on the battery casing 8.

[0047] Reference Figure 6 and Figure 7 As shown, in order to improve the detection effect of the battery casing 8, the inner wall of the battery casing 8 can also be photographed and its visual defects analyzed in this embodiment. Specifically, a positioning ring 731 is sleeved on the end of a plurality of self-locking telescopic members 73 away from the mounting rod 72. A telescopic rod 732 is rotatably mounted on the positioning ring 731. A horizontal plate 733 is rotatably mounted on the end of the telescopic rod 732 away from the positioning ring 731 between the two mounting rods 72 of each support group. A support column 734 is provided on the horizontal plate 733. A return spring rod 735 is provided between the lower end of the support column 734 and the conveyor belt 4. The return spring rod 735 always applies a top support force to the support column 734 away from the conveyor belt 4, and the return spring rod 735 can play a supporting and limiting role for the support column 734, so that the support column 734 always remains perpendicular to the conveyor belt 4.

[0048] Furthermore, in this embodiment, two symmetrical grooves 736 parallel to their axes are provided on the support column 734. An electric slider 737 is provided in the groove 736. A rectangular sleeve 738 is installed on the outer wall of the two electric sliders 737. A built-in camera 739 is provided on the four outer walls of the rectangular sleeve 738. The built-in camera 739 is electrically connected to the controller 65.

[0049] In the specific implementation process, when the conveyor belt 4 moves the self-locking telescopic component 73 and the battery casing 8 as a whole to the bottom of the U-shaped frame 61, the external camera 64 performs visual defect and flatness detection on the outer wall of the battery casing 8. At the same time, the electric slider 737 is activated. The electric slider 737 slides up and down along the slide groove 736, and the electric slider 737 drives the built-in camera 739 to move synchronously through the rectangular sleeve 738. This allows the built-in camera 739 to perform a comprehensive inspection of the inner wall of the battery casing 8 and capture the inspection image, which is then transmitted to the controller 65 in real time. The controller 65 sends the captured image to the inspection terminal, which analyzes the image. This enables simultaneous inspection of the inner and outer walls of the battery casing 8, ensuring the inspection effect of the battery casing 8 and preventing defects on the inner wall of the battery casing 8 from going undetected, which could have adverse effects and affect the performance of the battery.

[0050] When the conveyor belt 4 drives the mounting rod 72 and the self-locking telescopic component 73 to move circumferentially to the bend of the conveyor belt 4, the self-locking telescopic component 73 between two adjacent mounting rods 72 drives the telescopic rod 732 to adaptively extend and retract. During this period, the telescopic rod 732, the self-locking telescopic component 73, and the horizontal plate 733 adaptively rotate to avoid interference. Under the action of the support column 734 and the return spring rod 735, the horizontal plate 733 always remains perpendicular to the conveyor belt 4, which can limit the position of the horizontal plate 733 and prevent the position of the horizontal plate 733 from shifting, which would cause different distances between the built-in camera 739 and the four inner walls of the battery casing 8 and affect the shooting effect.

[0051] Furthermore, the present invention also provides a method for detecting defects in battery casings, comprising the following steps: S1: Starting device: First, the intermittent motor 5 drives the rotating shaft 3 to rotate and drives the conveyor belt 4 to move intermittently, so that the conveyor belt 4 drives the fixed unit 7 to move intermittently in the circumference.

[0052] S2: Battery casing installation: The battery casing 8 to be tested is fastened to the outside of the multiple self-locking telescopic members 73 of the support assembly with the opening facing downwards, so that the multiple suction cups 74 are all adsorbed against the inner top wall of the battery casing 8, thereby ensuring the stability of the conveyor belt 4 during the conveying of the battery casing 8; in addition, the length of the self-locking telescopic member 73 can be adjusted to adjust the distance between the suction cup 74 and the conveyor belt 4 according to the depth of the battery casing 8, thereby enabling the detection of battery casings 8 at different depths, which can improve the applicability of the present invention.

[0053] The rotating shaft 3 drives the conveyor belt 4 to move circumferentially. When the conveyor belt 4 moves the return pad 71, the self-locking telescopic component 73 and the battery casing 8 as a whole to below the U-shaped frame 61, the vent 755 at this location is connected to the sealing hopper 754 above. At this time, the air pump 753 is started. The air pump 753 extracts the air from the sealing hopper 754 above and creates a negative pressure inside the battery casing 8 through the vent 755. This allows the battery casing 8 to be fixed by the suction cup 74 and then further fixed by negative pressure adsorption. This further ensures the stability of the battery casing 8 during the testing process and prevents the image from becoming blurry due to its lack of stability and shaking during the shooting process.

[0054] S3: Battery casing inspection: After the conveyor belt 4 transports the battery casing 8 to the opening of the U-shaped frame 61 via the self-locking telescopic component 73, the external camera 64 is powered on and activated by the controller 65. The external camera 64 then captures images of the top and surrounding outer walls of the battery casing 8 and transmits the captured images to the controller 65 in real time. The controller 65 then sends the captured images to the inspection terminal, which analyzes the images in real time to determine if there are any obvious visual defects or unevenness on the outer walls of the battery casing 8. This ensures that the battery casing 8 with qualified flatness has sufficient strength and improves its performance.

[0055] At the same time, the electric slider 737 is activated, and the electric slider 737 slides up and down along the slide groove 736. The electric slider 737 drives the built-in camera 739 to move synchronously through the rectangular sleeve 738, so that the built-in camera 739 can perform a comprehensive inspection of the inner wall of the battery casing 8. The inspection images are also sent to the inspection terminal for analysis through the controller 65, thereby realizing the synchronous inspection of the inner and outer walls of the battery casing 8 and ensuring the inspection effect of the battery casing 8.

[0056] During the inspection of the battery casing 8, the conveyor belt 4 moves the inspected battery casing 8 to the lower position. At this time, the air pump 753 discharges air into the lower sealing hopper 754, allowing the air in the lower sealing hopper 754 to be discharged into the interior of the battery casing 8, thereby relieving the negative pressure and fixing effect of the battery casing 8, causing the battery casing 8 to fall off the U-shaped pad 71. At this time, the inspected battery casing 8 can be removed.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery casing defect detection device, characterized in that, It includes two parallel support plates (1), with a bracket (2) at the lower end of the support plate (1). Multiple rotating shafts (3) are rotatably installed between the two support plates (1). A conveyor belt (4) is fitted on the outer wall of the multiple rotating shafts (3). An intermittent motor (5) connected to any rotating shaft (3) is installed on the outer wall of any support plate (1) through a motor seat. An execution unit (6) for visual defect detection of the battery casing (8) is installed on the upper end of the support plate (1). Multiple fixing units (7) for limiting the battery casing (8) are evenly arranged on the outer wall of the conveyor belt (4). The battery casing (8) is stably conveyed to the execution unit (6) for visual defect detection by the conveyor belt (4) in conjunction with the fixing units (7).

2. The battery casing defect detection device according to claim 1, characterized in that: The execution unit (6) includes a U-shaped frame (61) installed on the upper end of two brackets (2). The opening of the U-shaped frame (61) is arranged downward. A connecting frame (62) is installed on the inner wall of the vertical and horizontal sections of the U-shaped frame (61). Side support plates (63) are provided on both sides of the horizontal section of the U-shaped frame (61). An external camera (64) for detecting defects and flatness of the outer wall of the battery casing (8) is installed on the side of the connecting frame (62) and the side support plate (63) near the middle of the U-shaped frame (61). A controller (65) is installed on the upper end of the horizontal section of the U-shaped frame (61). The controller (65) is electrically connected to multiple external cameras (64).

3. The battery casing defect detection device according to claim 1, characterized in that: The fixing unit (7) includes multiple U-shaped pads (71) installed on the outer wall of the conveyor belt (4). Multiple support groups located in the middle of the U-shaped pads (71) are also installed on the outer wall of the conveyor belt (4). Each support group includes two mounting rods (72) parallel to the axis of the rotating shaft (3). Two self-locking telescopic parts (73) are symmetrically arranged at the upper end of the mounting rods (72). A suction cup (74) is installed at the end of the self-locking telescopic part (73) away from the mounting rod (72). The fixing unit (7) also includes an adsorption mechanism (75) for improving the limiting effect on the battery casing (8).

4. The battery casing defect detection device according to claim 3, characterized in that: The self-locking telescopic component (73) consists of a fixed section and an adjusting section. The adjusting section and the fixed section are connected by a threaded connection to adjust the overall length of the self-locking telescopic component (73).

5. The battery casing defect detection device according to claim 3, characterized in that: The adsorption mechanism (75) includes two stabilizing plates (751) installed between two support plates (1). The two stabilizing plates (751) are located below the execution unit (6), and an air pump (753) is provided between the two stabilizing plates (751) through a mounting base (752). Sealing hoppers (754) that slide against the inner walls of the upper and lower sides of the conveyor belt (4) are installed at both ends of the stabilizing plates (751). The air pump (753) has its suction end connected to the upper sealing hopper (754), and its outlet end connected to the lower sealing hopper (754).

6. The battery casing defect detection device according to claim 5, characterized in that: A plurality of ventilation holes (755) are provided on the conveyor belt (4) corresponding to the position of the sealing hopper (754), and the ventilation holes (755) are connected to the sealing hopper (754).

7. A battery casing defect detection device according to claim 5, characterized in that: The sealing hopper (754) has rubber rollers (756) that are rotatably mounted on both sides of the side away from the air pump (753) and parallel to the axis of the rotating shaft (3), and rubber strips (757) that are slidably in contact with the inner wall of the conveyor belt (4) on both sides of the sealing hopper (754) that are perpendicular to the axis of the rotating shaft (3) and away from the air pump (753).

8. A battery casing defect detection device according to claim 3, characterized in that: A positioning ring (731) is fitted on one end of each of the self-locking telescopic components (73) away from the mounting rod (72). A telescopic rod (732) is rotatably mounted on the positioning ring (731). A horizontal plate (733) is rotatably mounted on one end of the telescopic rod (732) between the two mounting rods (72) of each support group. A support column (734) is provided on the horizontal plate (733). A reset spring rod (735) is provided between the lower end of the support column (734) and the conveyor belt (4).

9. A battery casing defect detection device according to claim 8, characterized in that: The support column (734) has two symmetrical grooves (736) parallel to its axis. An electric slider (737) is installed in the groove (736). A rectangular sleeve (738) is installed on the outer wall of the two electric sliders (737). A built-in camera (739) is installed on the four outer walls of the rectangular sleeve (738). The built-in camera (739) is electrically connected to the controller (65).

10. A method for detecting defects in a battery casing, comprising a battery casing defect detection device as described in any one of claims 1-9, characterized in that, The detection method includes the following steps: S1: Starting device: First, the intermittent motor (5) drives the rotating shaft (3) to rotate and drives the conveyor belt (4) to move intermittently, so that the conveyor belt (4) drives the fixed unit (7) to move intermittently in the circumferential direction; S2: Battery casing installation: The battery casing (8) to be tested is fastened onto the fixing unit (7) with the opening facing downwards; S3: Battery casing inspection: The conveyor belt (4) transports the battery casing (8) to the execution unit (6) through the fixing unit (7), and the execution unit (6) performs visual defect inspection on the inner and outer walls of the battery casing (8) during the process.

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