Defect detection system for cylindrical battery and detection method thereof

Abstract

The application discloses a kind of defect detection system of cylindrical battery and its detection method, belong to lithium battery detection technical field.The system includes: first visual inspection system and second visual inspection system;The first visual inspection system includes first image acquisition device and second image acquisition device, the first image acquisition device is used to collect the first polar surface image of the cylindrical battery positive pole, and the second image acquisition device is used to collect the insulating ring image of the cylindrical battery positive pole;The second visual inspection system includes third image acquisition device and fourth image acquisition device, and the third image acquisition device is used to collect the second polar surface image of the cylindrical battery negative pole, and the fourth image acquisition device is used to collect the insulating layer image of the cylindrical battery negative pole.The system can improve the precision and efficiency of battery two pole defect detection.

Description

Technical Field

[0001] This application belongs to the field of lithium battery testing technology, and in particular relates to a defect detection system and method for cylindrical batteries. Background Technology

[0002] As the application of lithium-ion cylindrical batteries becomes more widespread, the demand for lithium-ion cylindrical batteries is increasing, and the production efficiency of lithium-ion cylindrical batteries must also be improved accordingly. However, in the production process of lithium-ion cylindrical batteries, manual inspection of defects on the assembly line is usually required. Manual inspection of defects in lithium-ion cylindrical batteries is inefficient and prone to errors, resulting in low production efficiency of lithium-ion cylindrical batteries. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a defect detection system and method for cylindrical batteries, which can improve the accuracy and efficiency of defect detection at the battery electrodes.

[0004] In a first aspect, this application provides a defect detection system for a cylindrical battery, comprising: a first visual inspection system and a second visual inspection system, wherein the first visual inspection system is located on one side of the positive electrode of the cylindrical battery to be inspected, and the second visual inspection system is located on one side of the negative electrode of the cylindrical battery.

[0005] The first visual inspection system includes a first image acquisition device and a second image acquisition device. The first image acquisition device is used to acquire a first electrode surface image of the positive electrode of the cylindrical battery. The first electrode surface image is used to detect electrode surface defects of the positive electrode of the cylindrical battery. The second image acquisition device is used to acquire an insulating ring image of the positive electrode of the cylindrical battery. The insulating ring image is used to detect insulating ring defects of the positive electrode of the cylindrical battery.

[0006] The second visual inspection system includes a third image acquisition device and a fourth image acquisition device. The third image acquisition device is used to acquire an image of the second electrode surface of the negative electrode of the cylindrical battery. The second electrode surface image is used to detect electrode surface defects of the negative electrode of the cylindrical battery. The fourth image acquisition device is used to acquire an image of the insulating layer of the negative electrode of the cylindrical battery. The insulating layer image is used to detect defects in the insulating layer of the negative electrode of the cylindrical battery.

[0007] According to the defect detection system for cylindrical batteries of this application, multiple image acquisition devices are set on both sides of the cylindrical battery to acquire different images of the positive and negative poles of the cylindrical battery, thereby performing comprehensive and accurate defect detection on the cylindrical battery and improving the accuracy and efficiency of defect detection at the battery poles.

[0008] According to one embodiment of this application, the second image acquisition device includes:

[0009] At least one first camera, the first camera's shooting direction being perpendicular to the positive electrode surface of the cylindrical battery, the first camera being used to acquire an image of the first insulating ring of the positive electrode of the cylindrical battery, the first insulating ring image being used to detect defects on the surface of the insulating ring of the positive electrode of the cylindrical battery.

[0010] At least one second camera, the shooting direction of the second camera forms an angle with the shooting direction of the first camera at a first angle value, the first angle value being greater than 0 and less than 90 degrees, the second camera is used to acquire an image of the second insulating ring of the positive electrode of the cylindrical battery, the second insulating ring image is used to determine the number of insulating rings of the positive electrode of the cylindrical battery.

[0011] According to one embodiment of this application, the first camera includes a first camera lens, a first camera body, a first strobe parallel light source, and a first camera mounting assembly. The first camera lens, the first camera body, and the first strobe parallel light source are sequentially disposed on the first camera mounting assembly along a direction close to the positive electrode surface of the cylindrical battery.

[0012] The second camera includes a second camera lens, a second camera body, a first parallel coaxial light source, and a second camera mounting assembly. The second camera lens, the second camera body, and the first parallel coaxial light source are sequentially mounted on the second camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0013] According to one embodiment of this application, the fourth image acquisition device includes:

[0014] At least one third camera, the third camera being used to acquire an image of the first insulating layer of the negative electrode of the cylindrical battery;

[0015] At least one 3D camera is used to acquire point cloud data of the insulating layer of the negative electrode of the cylindrical battery.

[0016] The first insulating layer image and the insulating layer point cloud data are used to detect the insulating layer of the negative electrode of the cylindrical battery.

[0017] According to one embodiment of this application, the third camera includes a third camera lens, a third camera body, a second strobe parallel light source, and a third camera mounting assembly. The third camera lens, the third camera body, and the second strobe parallel light source are sequentially mounted on the third camera mounting assembly along a direction close to the negative electrode surface of the cylindrical battery.

[0018] According to one embodiment of this application, the first image acquisition device includes at least one fourth camera. The fourth camera includes a fourth camera lens, a fourth camera body, a fourth camera light source group, and a fourth camera mounting assembly. The fourth camera lens, the fourth camera body, and the fourth camera light source group are sequentially mounted on the fourth camera mounting assembly along a direction close to the positive electrode surface of the cylindrical battery.

[0019] According to one embodiment of this application, the fourth camera light source group includes a second parallel coaxial light source, a first strobe ring light source, and a second strobe ring light source. The second parallel coaxial light source, the first strobe ring light source, and the second strobe ring light source are sequentially mounted on the fourth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0020] According to one embodiment of this application, the third image acquisition device includes at least one fifth camera. The fifth camera includes a fifth camera lens, a fifth camera body, a fifth camera light source group, and a fifth camera mounting assembly. The fifth camera lens, the fifth camera body, and the fifth camera light source group are sequentially mounted on the fifth camera mounting assembly along a direction close to the negative electrode surface of the cylindrical battery.

[0021] According to one embodiment of this application, the fifth camera light source group includes a third parallel coaxial light source, a third strobe ring light source, and a fourth strobe ring light source, which are sequentially mounted on the fifth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0022] Secondly, this application provides a detection method based on the above-mentioned defect detection system for cylindrical batteries, the method comprising:

[0023] The positive and negative electrode images of the cylindrical battery to be inspected are acquired. The positive electrode image is acquired by a first vision inspection system and includes a first electrode surface image and an insulating ring image. The negative electrode image is acquired by a second vision inspection system and includes a second electrode surface image and an insulating layer image.

[0024] Based on the positive electrode image, the positive electrode defect detection information of the cylindrical battery is determined, and based on the negative electrode image, the negative electrode defect detection information of the cylindrical battery is determined.

[0025] According to the defect detection method of the cylindrical battery defect detection system of this application, multiple image acquisition devices are set on both sides of the cylindrical battery to acquire different images of the positive and negative poles of the cylindrical battery, so as to perform comprehensive and accurate defect detection of the cylindrical battery, which can improve the accuracy and efficiency of defect detection of the battery poles.

[0026] Thirdly, this application provides a detection device for a defect detection system of cylindrical batteries, the device comprising:

[0027] The acquisition module is used to acquire positive and negative electrode images of the cylindrical battery to be inspected. The positive electrode image is acquired by a first vision inspection system and includes a first electrode surface image and an insulating ring image. The negative electrode image is acquired by a second vision inspection system and includes a second electrode surface image and an insulating layer image.

[0028] The processing module is used to determine the positive electrode defect detection information of the cylindrical battery based on the positive electrode image, and to determine the negative electrode defect detection information of the cylindrical battery based on the negative electrode image.

[0029] Fourthly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the detection method of the defect detection system for cylindrical batteries as described in the second aspect above.

[0030] Fifthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the detection method of the defect detection system for cylindrical batteries as described in the second aspect above.

[0031] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the detection method of the defect detection system for cylindrical batteries as described in the second aspect above.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is a schematic diagram of the structure of the defect detection system for cylindrical batteries provided in the embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the structure of the fourth camera provided in an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the structure of the first camera provided in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the second camera provided in an embodiment of this application;

[0038] Figure 5 This is one of the structural schematic diagrams of the cylindrical battery transport line provided in the embodiments of this application;

[0039] Figure 6 This is a second schematic diagram of the cylindrical battery transport line provided in the embodiments of this application;

[0040] Figure 7 This is a schematic diagram of the structure of the fifth camera provided in an embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the structure of the third camera and the 3D camera provided in the embodiments of this application;

[0042] Figure 9 This is a schematic flowchart of the detection method of the defect detection system for cylindrical batteries provided in the embodiments of this application;

[0043] Figure 10 This is a schematic diagram of the structure of the detection device of the defect detection system for cylindrical batteries provided in the embodiments of this application;

[0044] Figure 11 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0045] Figure label:

[0046] First vision inspection system 100, fourth camera stand plate 101, fourth camera base plate 102, fourth adjustable slide 103, fourth slide plate 104, fourth camera body 105, fourth camera lens 106, fourth lens clamp 107, second parallel coaxial light source 108, first light source adjustment plate 109, second light source adjustment plate 110, first light source fixing plate 111, fourth light source fixing plate 112, second light source fixing plate 113, third light source fixing plate 114, first strobe ring light source 115, second strobe ring light source 116, first camera stand plate 117, first camera base plate 118, first adjustable slide 119, first slide plate Plate 120, first camera body 121, first camera lens 122, first lens clamp 123, first camera mounting plate 124, first mounting bracket 125, first strobe parallel light source 126, first rotating shaft 127, first mounting base 128, first base plate 129, second base plate 130, second guide plate 131, third base plate 132, second camera upright plate 133, second camera base plate 134, second adjustable slide 135, second slide plate 136, second camera body 137, second camera lens 138, second lens clamp 139, second mounting base 140, second camera mounting plate 141, first parallel coaxial light source 142;

[0047] The following components are included: a transport line 200, a first baffle 201, a first belt 202, a third transport line fixing plate 203, a first transport line fixing plate 204, a first synchronous pulley 205, a second transport line fixing plate 206, a first bearing 207, a second synchronous pulley 208, a first synchronous belt 209, a first upright plate 210, a first reinforcing plate 211, a first base 212, a first pad 213, a second baffle 214, a first mounting base 215, a first sensor 216, a third baffle 217, a second pad 218, a second sensor 219, a second mounting base 220, a fourth baffle 221, a third pad 222, a fourth pad 223, a fifth baffle 224, a first cylinder 225, a fourth transport line fixing plate 226, a drive motor 227, a fifth transport line fixing plate 228, a first support column 229, and a coupling 230.

[0048] Second vision inspection system 300, fifth camera stand plate 301, fifth camera base plate 302, fifth adjustable slide 303, fifth slide plate 304, fifth camera body 305, fifth camera lens 306, fifth lens clamp 307, third light source adjustment plate 308, fourth light source adjustment plate 309, third parallel coaxial light source 310, fifth light source fixing plate 311, third strobe ring light source 312, seventh light source fixing plate 313, sixth light source fixing plate 314, fourth strobe ring light source 315, third camera 316, third camera base plate 317, third adjustable slide 318, third slide plate 319, third camera body 320, third camera lens 321, third lens clamp 322, third mounting base 323, third pivot 324, third camera mounting plate 325, second strobe parallel light source 326, third fixed bracket 327, sixth adjustable slide 328, 3D camera body 329, sixth mounting base 330, sixth camera mounting plate 331, seventh camera mounting plate 332, 3D camera base plate 333. Detailed Implementation

[0049] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0050] The following is for reference. Figures 1-11 This application describes a defect detection system for cylindrical batteries and a method for detecting defects in cylindrical batteries according to embodiments of the present application.

[0051] like Figure 1 As shown, the defect detection system for cylindrical batteries includes a first vision inspection system 100 and a second vision inspection system 300.

[0052] The first visual inspection system 100 is located on the positive side of the cylindrical battery to be inspected, and the second visual inspection system 300 is located on the negative side of the cylindrical battery.

[0053] The first vision inspection system 100 on the positive electrode side of the cylindrical battery is used to acquire images of the positive electrode of the cylindrical battery and to detect defects in the positive electrode of the cylindrical battery.

[0054] The second vision inspection system 300 on the negative electrode side of the cylindrical battery is used to acquire images of the negative electrode of the cylindrical battery and to perform defect detection on the negative electrode of the cylindrical battery.

[0055] The first visual inspection system 100 includes a first image acquisition device and a second image acquisition device. The first image acquisition device is used to acquire an image of the first electrode surface of the positive electrode of the cylindrical battery. The first electrode surface image is used to detect electrode surface defects of the positive electrode of the cylindrical battery. The second image acquisition device is used to acquire an image of the insulating ring of the positive electrode of the cylindrical battery. The insulating ring image is used to detect insulating ring defects of the positive electrode of the cylindrical battery.

[0056] In this embodiment, the first electrode surface image and the insulating ring image of the cylindrical battery are acquired by the first image acquisition device and the second image acquisition device. Based on the first electrode surface image and the insulating ring image, the positive electrode surface defect detection and the insulating ring defect detection of the cylindrical battery can be performed, thereby improving the defect detection accuracy of the cylindrical battery.

[0057] The second visual inspection system 300 includes a third image acquisition device and a fourth image acquisition device. The third image acquisition device is used to acquire an image of the second electrode surface of the negative electrode of the cylindrical battery. The second electrode surface image is used to detect electrode surface defects of the negative electrode of the cylindrical battery. The fourth image acquisition device is used to acquire an image of the insulating layer of the negative electrode of the cylindrical battery. The insulating layer image is used to detect defects in the insulating layer of the negative electrode of the cylindrical battery.

[0058] In this embodiment, the second electrode surface image and the insulating layer image of the cylindrical battery are acquired by the third image acquisition device and the fourth image acquisition device. Based on the second electrode surface image and the insulating layer image, the negative electrode surface defect detection and the insulating layer defect detection of the cylindrical battery can be performed, thereby improving the defect detection accuracy of the cylindrical battery.

[0059] In this embodiment, a first visual inspection system 100, located on the positive electrode side of the cylindrical battery, acquires images of the first electrode surface and the insulating ring to detect positive electrode defects. A second visual inspection system 300, located on the negative electrode side of the cylindrical battery, acquires images of the second electrode surface and the insulating layer to detect negative electrode defects. By using multiple image acquisition devices located on both sides of the cylindrical battery to acquire different images of the positive and negative electrodes respectively, a comprehensive and accurate defect detection of the cylindrical battery can be performed, which can improve the accuracy and efficiency of defect detection at both electrodes.

[0060] According to the defect detection system for cylindrical batteries provided in this application, multiple image acquisition devices are set on both sides of the cylindrical battery to acquire different images of the positive and negative poles of the cylindrical battery, thereby performing comprehensive and accurate defect detection on the cylindrical battery and improving the accuracy and efficiency of defect detection at both poles of the battery.

[0061] In some embodiments, the second image acquisition device includes:

[0062] At least one first camera, the first camera's shooting direction is perpendicular to the positive electrode surface of the cylindrical battery, the first camera is used to acquire an image of the first insulating ring of the positive electrode of the cylindrical battery, and the first insulating ring image is used to detect defects on the surface of the insulating ring of the positive electrode of the cylindrical battery.

[0063] At least one second camera is provided, the shooting direction of the second camera is at an angle of a first angle value to the shooting direction of the first camera, the first angle value is greater than 0 and less than 90 degrees, the second camera is used to acquire an image of the second insulating ring of the positive electrode of the cylindrical battery, and the image of the second insulating ring is used to determine the number of positive electrode insulating rings of the cylindrical battery.

[0064] The first camera and the second camera can be area scan cameras. For example, the first camera and the second camera can be CCD (Charge Coupled Device) area scan cameras or CMOS (Complementary Metal Oxide Semiconductor) area scan cameras.

[0065] like Figure 1 As shown, the shooting direction of the first camera is perpendicular to the positive electrode surface of the cylindrical battery, and it can capture an image of the insulating ring of the positive electrode of the cylindrical battery. The first vision inspection system 100 can obtain the defect detection result of the insulating ring of the cylindrical battery based on the pixel information in the insulating ring image.

[0066] The second camera is set at an acute angle to the first camera, allowing it to capture an image of the second insulating ring of the cylindrical battery's positive electrode. This image is used to characterize the insulating ring of the cylindrical battery's positive electrode from an oblique viewing angle, thereby determining the thickness of the insulating ring and the number of insulating rings installed, and thus whether too many insulating rings have been installed.

[0067] In practice, for example, if the thickness of an insulating ring is 5mm, and the thickness of the second insulating ring is determined to be 10mm based on the image of the second insulating ring, then it can be determined that two insulating rings are installed on the positive electrode of the cylindrical battery, and thus it can be concluded that there is an over-installation of insulating rings on the positive electrode of the cylindrical battery.

[0068] In some embodiments, the first camera includes a first camera lens 122, a first camera body 121, a first strobe parallel light source 126, and a first camera mounting assembly. The first camera lens 122, the first camera body 121, and the first strobe parallel light source 126 are sequentially disposed on the first camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0069] like Figure 3 As shown, the first camera mounting assembly includes a first camera stand plate 117, a first camera base plate 118, a first adjustable slide 119, a first slide plate 120, a first lens clamp 123, a first rotating shaft 127, a first fixing seat 128, a first camera fixing plate 124, a first fixing bracket 125, and a first base plate 129.

[0070] The first camera lens 122 is mounted on the first end of the first camera body 121, the first camera base plate 118 is mounted on the first camera upright plate 117, the first adjustable slide 119 is mounted on the first camera base plate 118, the first slide plate 120 is mounted on the first adjustable slide 119, and the first camera lens 122 is fixed to the first slide plate 120 by the first lens clamp 123.

[0071] The first rotating shaft 127 and the first fixed base 128 cooperate to fix the first strobe parallel light source 126. The first rotating shaft 127 and the first fixed base 128 are installed on the first camera mounting plate 124. The first camera mounting plate 124 is installed on the first camera base plate 118. The first fixed bracket 125 connects the first camera base plate 118 and the first camera mounting plate 124 and is installed on the common vertical plane of the first camera base plate 118 and the first camera mounting plate 124. The first camera upright plate 117 is installed on the first base plate 129, and the first base plate 129 is used to support the first camera.

[0072] In actual implementation, the first camera may include four first strobe parallel light sources 126, which are fixed by four sets of first rotating shafts 127 and first fixing bases 128. The four first strobe parallel light sources 126 are installed on the top, bottom, left and right sides of the first camera fixing plate 124.

[0073] In this embodiment, the strobe parallel light source can achieve an illuminance of tens of millions of lux in an instant, which is about 160 times the brightness of a normal light source. It also has a fast response speed and a pulse width range of 0-50 microseconds, and can capture clear images of the first insulating ring of the cylindrical battery even on the fast-moving transport line 200.

[0074] In some embodiments, the second camera includes a second camera lens 138, a second camera body 137, a first parallel coaxial light source 142, and a second camera mounting assembly. The second camera lens 138, the second camera body 137, and the first parallel coaxial light source 142 are sequentially mounted on the second camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0075] like Figure 4 As shown, the second camera mounting assembly includes a second camera stand plate 133, a second camera base plate 134, a second adjustable slide 135, a second slide plate 136, a second lens clamp 139, a second mounting base 140, a second camera mounting plate 141, a second base plate 130, a third base plate 132, and a second guide plate 131.

[0076] The second camera lens 138 is mounted on the first end of the second camera body 137, the second camera base plate 134 is mounted on the second camera upright plate 133, the second adjustable slide 135 is mounted on the second camera base plate 134, the second slide plate 136 is mounted on the second adjustable slide 135, and the second camera lens 138 is fixed to the second slide plate 136 by the second lens clamp 139.

[0077] The first parallel coaxial light source 142 is mounted on the second camera mounting plate 141 and fastened to the second mounting base 140. The second mounting base 140 is mounted on the second camera base plate 134. The second camera base plate 134 is mounted on the second camera upright plate 133. The second camera upright plate 133 is mounted on the third base plate 132. The third base plate 132 is mounted on the second guide plate 131. The second guide plate 131 is mounted on the second base plate 130. The second base plate 130 is used to support the second camera.

[0078] In this embodiment, using a parallel coaxial light source can eliminate shadows caused by unevenness on the surface of the cylindrical battery, thereby reducing interference. Furthermore, a beam splitter design can be adopted to reduce light loss and improve imaging clarity, thereby improving the accuracy of defect detection.

[0079] In some embodiments, the fourth image acquisition device includes:

[0080] At least one third camera is used to acquire an image of the first insulating layer of the negative electrode of the cylindrical battery.

[0081] At least one 3D camera is used to acquire point cloud data of the insulating layer of the negative electrode of a cylindrical battery.

[0082] The first insulating layer image and insulating layer point cloud data were used to detect the insulating layer of the negative electrode of the cylindrical battery.

[0083] The third camera can also be an area array camera. The third camera is positioned directly opposite the negative electrode of the cylindrical battery and can capture images of the insulating layer of the negative electrode of the cylindrical battery.

[0084] It is understandable that some minor defects on the surface of the insulating layer of a cylindrical battery cannot be effectively identified by the first insulating layer image. In this embodiment, point cloud data of the insulating layer is collected by a 3D camera, and combined with the first insulating layer image and the insulating layer point cloud data, different defects in the insulating layer can be accurately detected, thereby improving the detection rate of minor defects.

[0085] In some embodiments, the third camera includes a third camera lens 321, a third camera body 320, a second strobe parallel light source 326, and a third camera mounting assembly. The third camera lens 321, the third camera body 320, and the second strobe parallel light source 326 are sequentially mounted on the third camera mounting assembly along the direction close to the negative electrode surface of the cylindrical battery.

[0086] like Figure 8 As shown, the third camera mounting assembly includes a third camera stand plate 316, a third camera base plate 317, a third adjustable slide 318, a third slide plate 319, a third lens clamp 322, a third rotating shaft 324, a third fixing base 323, a third camera fixing plate 325, a third fixing bracket 327, and a third base plate 132.

[0087] The third camera lens 321 is mounted on the first end of the third camera body 320, the third camera base plate 317 is mounted on the third camera upright plate 316, the third adjustable slide 318 is mounted on the third camera base plate 317, the third slide plate 319 is mounted on the third adjustable slide 318, and the third camera lens 321 is fixed to the third slide plate 319 by the third lens clamp 322.

[0088] The third pivot 324 and the third mounting base 323 cooperate to fix the second strobe parallel light source 326. The third pivot 324 and the third mounting base 323 are installed on the third camera mounting plate 325. The third camera mounting plate 325 is installed on the third camera base plate 317. The third mounting bracket 327 connects the third camera base plate 317 and the third camera mounting plate 325 and is installed on the common vertical plane of the third camera base plate 317 and the third camera mounting plate 325. The third camera stand plate 316 is installed on the third base plate 132, which is used to support the third camera.

[0089] In actual implementation, the third camera may include four second strobe parallel light sources 326. The second strobe parallel light sources 326 are fixed by four sets of third rotating shafts 324 and third fixing bases 323. The four second strobe parallel light sources 326 are installed on the top, bottom, left and right sides of the third camera fixing plate 325.

[0090] like Figure 8 As shown, the 3D camera includes a 3D camera mounting assembly and a 3D camera body 329. The 3D camera mounting assembly includes a sixth adjustable slide 328, a sixth fixed base 330, a sixth camera fixing plate 331, a seventh camera fixing plate 332, and a 3D camera base plate.

[0091] The 3D camera body 329 is mounted on the sixth fixed base 330, which is mounted on the 3D camera base plate 333. The sixth adjustable slide 328 is connected to the sixth fixed base 330 and is mounted on one side of the 3D camera body 329. The sixth camera fixing plate 331 and the seventh camera fixing plate 332 are located on the sixth fixed base 330 and are used to fix the 3D camera body 329.

[0092] In this embodiment, the strobe parallel light source can achieve an illuminance of tens of millions of lux in an instant, which is about 160 times the brightness of a normal light source. It also has a fast response speed and a pulse width range of 0-50 microseconds, and can capture clear images of the first insulating layer of the cylindrical battery even on the fast-moving transport line 200.

[0093] In some embodiments, the first image acquisition device includes at least one fourth camera, which includes a fourth camera lens 106, a fourth camera body 105, a fourth camera light source group, and a fourth camera mounting assembly. The fourth camera lens 106, the fourth camera body 105, and the fourth camera light source group are sequentially mounted on the fourth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0094] like Figure 2 As shown, the fourth camera mounting assembly includes a fourth camera stand plate 101, a fourth camera base plate 102, a fourth adjustable slide 103, a fourth slide plate 104, a fourth lens clamp 107, a first light source adjustment plate 109, a second light source adjustment plate 110, a first light source fixing plate 111, a second light source fixing plate 113, a third light source fixing plate 114, and a fourth light source fixing plate 112.

[0095] The fourth camera lens 106 is mounted on the first end of the fourth camera body 105, the fourth camera base plate 102 is mounted on the fourth camera upright plate 101, the fourth adjustable slide 103 is mounted on the fourth camera base plate 102, the fourth slide plate 104 is mounted on the fourth adjustable slide 103, and the fourth camera lens 106 is fixed to the fourth slide plate 104 by the fourth lens clamp 107.

[0096] In some embodiments, the fourth camera light source group includes a second parallel coaxial light source 108, a first strobe ring light source 115, and a second strobe ring light source 116. The second parallel coaxial light source 108, the first strobe ring light source 115, and the second strobe ring light source 116 are sequentially mounted on the fourth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0097] The second parallel coaxial light source 108 is mounted on the fourth camera base plate 102. A first light source adjustment plate 109 is mounted on the upper end of the second parallel coaxial light source 108. A first light source fixing plate 111 is mounted on the fourth camera base plate 102 and fastened to one side of the second parallel coaxial light source 108. A second light source adjustment plate 110 is mounted on the other side of the second parallel coaxial light source 108. A first strobe ring light source 115 is mounted on the fourth camera base plate 102. A second light source fixing plate 113 is fastened to one side of the first strobe ring light source 115. A second strobe ring light source 116 is mounted on the fourth camera base plate 102. A third light source fixing plate 114 is fastened to one side of the second strobe ring light source 116. The second light source fixing plate 113 and the third light source fixing plate 114 are mounted on a fourth light source fixing plate 112. The fourth light source fixing plate 112 is mounted on the fourth camera base plate 102.

[0098] In some embodiments, the third image acquisition device includes at least one fifth camera, which includes a fifth camera lens 306, a fifth camera body 305, a fifth camera light source group, and a fifth camera mounting assembly. The fifth camera lens 306, the fifth camera body 305, and the fifth camera light source group are sequentially mounted on the fifth camera mounting assembly along the direction close to the negative electrode surface of the cylindrical battery.

[0099] like Figure 7 As shown, the fifth camera mounting assembly includes a fifth camera stand plate 301, a fifth camera base plate 302, a fifth adjustable slide 303, a fifth slide plate 304, a fifth lens clamp 307, a third light source adjustment plate 308, a fourth light source adjustment plate 309, a fifth light source fixing plate 311, a sixth light source fixing plate 314, and a seventh light source fixing plate 313.

[0100] The fifth camera lens 306 is mounted on the first end of the fifth camera body 305, the fifth camera base plate 302 is mounted on the fifth camera upright plate 301, the fifth adjustable slide 303 is mounted on the fifth camera base plate 302, the fifth slide plate 304 is mounted on the fifth adjustable slide 303, and the fifth camera lens 306 is fixed to the fifth slide plate 304 by the fifth lens clamp 307.

[0101] In some embodiments, the fifth camera light source group includes a third parallel coaxial light source 310, a third strobe ring light source 312, and a fourth strobe ring light source 315, which are sequentially mounted on the fifth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

[0102] The third parallel coaxial light source 310 is mounted on the fifth camera base plate 302. A third light source adjustment plate 308 is mounted on the upper end of the third parallel coaxial light source 310. A fourth light source adjustment plate 309 is mounted on the other side of the third parallel coaxial light source 310. A third strobe ring light source 312 is mounted on the fifth camera base plate 302. A fifth light source fixing plate 311 is fastened to one side of the third strobe ring light source 312. A fourth strobe ring light source 315 is mounted on the fifth camera base plate 302. A sixth light source fixing plate 314 is fastened to one side of the fourth strobe ring light source 315. The fifth light source fixing plate 311 and the sixth light source fixing plate 314 are mounted on a seventh light source fixing plate 313. The seventh light source fixing plate 313 is mounted on the fifth camera base plate 302.

[0103] In this embodiment of the application, the cylindrical battery detected by the defect detection system for the cylindrical battery can be a cylindrical battery being unloaded on the transport line 200. The transport line 200 is located between the first vision detection system 100 and the second vision detection system 300. The first vision detection system 100 is used to detect the positive electrode surface of the cylindrical battery being unloaded, and the second vision detection system 300 is used to detect the negative electrode surface of the cylindrical battery being unloaded.

[0104] In practice, the defect detection system for cylindrical batteries can be used in conjunction with transport line 200 to detect the cylindrical batteries transported on transport line 200.

[0105] The cylindrical batteries transported on transport line 200 are all arranged in the same way. For example, the positive electrode of the cylindrical battery is located on the left side of transport line 200, and the negative electrode of the cylindrical battery is located on the right side of transport line 200.

[0106] In this embodiment, a first visual inspection system 100 is disposed on the left side of the transport line 200 for detecting defects in the positive electrode of the cylindrical battery, and a second visual inspection system 300 is disposed on the right side of the transport line 200 for detecting defects in the negative electrode of the cylindrical battery.

[0107] like Figure 5 As shown, the structure of the transport line 200 includes: a first fixed component, a first transmission component, and a first sensing component.

[0108] The first fixing component includes a first belt 202, a first baffle 201, a second baffle 214, a first transport line fixing plate 204, a second transport line fixing plate 206, a third transport line fixing plate 203, and two first support seats.

[0109] The first transmission assembly includes a first synchronous pulley 205, a second synchronous pulley 208, a first bearing 207, and a first synchronous belt 209.

[0110] The first sensing component includes a first mounting base 215 and a first sensor 216.

[0111] The first belt 202 is wound around the first synchronous pulley 205 at one end and around the second synchronous pulley 208 at the other end, and is installed on the first baffle 201. The first synchronous pulley 205 is installed on the first transport line fixing plate 204. The first transport line fixing plate 204 is fixed to the first end of the transport line 200 by screws and is installed on the third transport line fixing plate 203. The third transport line fixing plate 203 is installed on the first baffle 201 by screws. The first baffle 201 is installed on the first support base, and the first support base is used to fix the first baffle 201.

[0112] The first support includes a first reinforcing plate 211, a first upright plate 210, and a first base 212. The first base 212 is installed at the lower end of the first upright plate 210 to support the first upright plate 210. The first reinforcing plate 211 is installed on the common vertical surface of the first upright plate 210 and the first base 212 to improve the strength of the first support.

[0113] The first bearing 207 is mounted on the second transport line fixing plate 206. The second transport line fixing plate 206 is fixed to the second end of the transport line 200 by screws. The second synchronous pulley 208 is mounted on the first bearing 207. One end of the first synchronous belt 209 is mounted on the first synchronous pulley 205, and the other end is mounted on the second synchronous pulley 208.

[0114] The first pad 213 is mounted on the first baffle 201, the second baffle 214 is mounted on the first pad 213, and the first sensing component is mounted on the second baffle 214. The first mounting base 215 is mounted on the second baffle 214, and the first sensor 216 is mounted on the first mounting base 215. The first sensor 216 is used to detect whether there is a cylindrical battery to be detected on the first synchronous belt 209.

[0115] like Figure 6 As shown, the structure of the transport line 200 also includes: a second fixing component, a second transmission component, and a second sensing component.

[0116] The second fixing component includes a third baffle 217, a fourth baffle 221, a fifth baffle 224, a second pad 218, a third pad 222, a fourth pad 223, a fourth transport line fixing plate 226, a fifth transport line fixing plate 228, a first support column 229, and a coupling 230.

[0117] The second transmission assembly includes a drive motor 227 and a first cylinder 225, and the second sensing assembly includes a second sensor 219 and a second mounting base 220.

[0118] The third baffle 217 is mounted on the second pad 218 and fastened to the first end of the transport line 200. The second sensor 219 is mounted on the second mounting base 220. The fourth baffle 221 is mounted on the third pad 222. The fifth baffle 224 is mounted on the fourth pad 223. The fifth baffle 224 is located on the second support plate near the motor.

[0119] The first cylinder 225 is mounted on the fourth transport line fixing plate 226. The side of the first cylinder 225 is screwed to the side of the fourth transport line fixing plate 226. The fourth transport line fixing plate 226 is fastened to the second end of the transport line 200. The drive motor 227 is mounted on the fifth transport line fixing plate 228. The side of the fifth transport line fixing plate 228 is engaged with one end of the first support column 229. The other end of the first support column 229 is fastened to the second end of the transport line 200. One end of the coupling 230 is connected to the drive motor 227, and the other end is mounted to the second end of the transport line 200.

[0120] In this embodiment, during the movement of the cylindrical battery on the transport line 200, the first sensor 216 and the second sensor 219 can sense the cylindrical battery and feed the signal back to the PLC. After receiving the signal, the PLC can control the first vision inspection system 100 and the second vision inspection system 300 to perform positive electrode defect detection and negative electrode defect detection on the cylindrical battery respectively, and obtain the positive electrode defect detection result and the negative electrode defect detection result.

[0121] The first image acquisition device and the second image acquisition device are used to acquire images of different parts of the cylindrical battery. After the first sensor 216 and the second sensor 219 sense the cylindrical battery, the first image acquisition device can capture an image of the first electrode surface of the positive electrode of the cylindrical battery, and the second image acquisition device can capture an image of the insulating ring of the positive electrode insulating ring of the cylindrical battery.

[0122] The third and fourth image acquisition devices are used to acquire images of different parts of the cylindrical battery. After the first sensor 216 and the second sensor 219 sense the cylindrical battery, the first image acquisition device can capture an image of the first electrode surface of the positive electrode of the cylindrical battery, and the second image acquisition device can capture an image of the insulating ring of the positive electrode insulating ring of the cylindrical battery.

[0123] Based on the positive electrode defect detection results and the negative electrode defect detection results, the defect detection system controls the transport line 200 and the first cylinder 225 to push cylindrical batteries with both positive and negative electrode defect detection results marked as OK into the OK material box, and push cylindrical batteries with either positive or negative electrode defect detection results marked as NG into the NG material box for rework or disposal.

[0124] This application also provides a detection method based on the above-described cylindrical battery defect detection system.

[0125] like Figure 9 As shown, the defect detection method of the cylindrical battery defect detection system includes steps 910 and 920.

[0126] Step 910: Obtain the positive and negative electrode images of the cylindrical battery to be tested.

[0127] The positive electrode image is acquired by the first vision detection system and includes the first electrode surface image and the insulating ring image. The negative electrode image is acquired by the second vision detection system and includes the second electrode surface image and the insulating layer image.

[0128] Step 920: Based on the positive electrode image, determine the positive electrode defect detection information of the cylindrical battery; and based on the negative electrode image, determine the negative electrode defect detection information of the cylindrical battery.

[0129] In this embodiment, the positive electrode image includes a first electrode surface image and an insulating ring image. Based on the first electrode surface image and the insulating ring image, positive electrode surface defect detection and insulating ring defect detection can be performed on the cylindrical battery, thereby improving the defect detection accuracy of the cylindrical battery.

[0130] The negative electrode image includes the second electrode surface image and the insulating layer image. Based on the second electrode surface image and the insulating layer image, defects in the negative electrode surface and the insulating layer of the cylindrical battery can be detected, thereby improving the accuracy of defect detection in the cylindrical battery.

[0131] According to the defect detection method of the cylindrical battery provided in the embodiments of this application, multiple image acquisition devices are set on both sides of the cylindrical battery to acquire different images of the positive and negative poles of the cylindrical battery, so as to perform comprehensive and accurate defect detection on the cylindrical battery, thereby improving the accuracy and efficiency of defect detection at the two poles of the battery.

[0132] This application also provides a detection device for a defect detection system for cylindrical batteries.

[0133] like Figure 10 As shown, the defect detection device of the cylindrical battery defect detection system includes:

[0134] The acquisition module 1001 is used to acquire the positive electrode image and the negative electrode image of the cylindrical battery to be inspected. The positive electrode image is acquired by the first vision inspection system and includes the first electrode surface image and the insulating ring image. The negative electrode image is acquired by the second vision inspection system and includes the second electrode surface image and the insulating layer image.

[0135] The processing module 1002 is used to determine the positive electrode defect detection information of the cylindrical battery based on the positive electrode image, and to determine the negative electrode defect detection information of the cylindrical battery based on the negative electrode image.

[0136] According to the defect detection device provided in the embodiments of this application, multiple image acquisition devices are set on both sides of the cylindrical battery to acquire different images of the positive and negative poles of the cylindrical battery, thereby performing comprehensive and accurate defect detection on the cylindrical battery and improving the accuracy and efficiency of defect detection at the battery poles.

[0137] In some embodiments, such as Figure 11 As shown, this application embodiment also provides an electronic device 1100, including a processor 1101, a memory 1102, and a computer program stored in the memory 1102 and executable on the processor 1101. When the program is executed by the processor 1101, it implements the various processes of the above-described cylindrical battery defect detection system detection method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0138] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0139] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described cylindrical battery defect detection system detection method embodiment and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0140] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0141] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the detection method of the above-described cylindrical battery defect detection system.

[0142] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0143] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0144] In the description of this application, it should be understood that the terms "thickness," "upper," "lower," "left," "right," "bottom," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do 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 a limitation of this application. In the description of this application, "first feature" and "second feature" may include one or more of these features. In the description of this application, "multiple" means two or more.

[0145] In the description of this application, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this application, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0146] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0147] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A defect detection system of a cylindrical battery, characterized by, include: A first visual inspection system and a second visual inspection system are used, wherein the first visual inspection system is located on one side of the positive electrode of the cylindrical battery to be inspected, and the second visual inspection system is located on one side of the negative electrode of the cylindrical battery. The first visual inspection system includes a first image acquisition device and a second image acquisition device. The first image acquisition device is used to acquire a first electrode surface image of the positive electrode of the cylindrical battery. The first electrode surface image is used to detect electrode surface defects of the positive electrode of the cylindrical battery. The second image acquisition device is used to acquire an insulating ring image of the positive electrode of the cylindrical battery. The insulating ring image is used to detect insulating ring defects of the positive electrode of the cylindrical battery. The second visual inspection system includes a third image acquisition device and a fourth image acquisition device. The third image acquisition device is used to acquire an image of the second electrode surface of the negative electrode of the cylindrical battery. The second electrode surface image is used to detect electrode surface defects of the negative electrode of the cylindrical battery. The fourth image acquisition device is used to acquire an image of the insulating layer of the negative electrode of the cylindrical battery. The insulating layer image is used to detect defects in the insulating layer of the negative electrode of the cylindrical battery. The second image acquisition device includes: At least one first camera, the first camera's shooting direction being perpendicular to the positive electrode surface of the cylindrical battery, the first camera being used to acquire an image of the first insulating ring of the positive electrode of the cylindrical battery, the first insulating ring image being used to detect defects on the surface of the insulating ring of the positive electrode of the cylindrical battery. At least one second camera, the shooting direction of the second camera forms an angle with the shooting direction of the first camera at a first angle value, the first angle value being greater than 0 and less than 90 degrees, the second camera is used to acquire an image of the second insulating ring of the positive electrode of the cylindrical battery, the second insulating ring image is used to determine the number of insulating rings of the positive electrode of the cylindrical battery.

2. The defect detection system of the cylindrical battery according to claim 1, characterized by, The first camera includes a first camera lens, a first camera body, a first strobe parallel light source, and a first camera mounting assembly. The first camera lens, the first camera body, and the first strobe parallel light source are sequentially disposed on the first camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery. The second camera includes a second camera lens, a second camera body, a first parallel coaxial light source, and a second camera mounting assembly. The second camera lens, the second camera body, and the first parallel coaxial light source are sequentially mounted on the second camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery. 3.The defect detection system of a cylindrical battery according to claim 1, characterized by, The fourth image acquisition device includes: At least one third camera, the third camera being used to acquire an image of the first insulating layer of the negative electrode of the cylindrical battery; At least one 3D camera is used to acquire point cloud data of the insulating layer of the negative electrode of the cylindrical battery. The first insulating layer image and the insulating layer point cloud data are used to detect the insulating layer of the negative electrode of the cylindrical battery.

4. The defect detection system for cylindrical batteries according to claim 3, characterized in that, The third camera includes a third camera lens, a third camera body, a second strobe parallel light source, and a third camera mounting assembly. The third camera lens, the third camera body, and the second strobe parallel light source are sequentially mounted on the third camera mounting assembly along the direction close to the negative electrode surface of the cylindrical battery.

5. The defect detection system for cylindrical batteries according to any one of claims 1-4, characterized in that, The first image acquisition device includes at least one fourth camera. The fourth camera includes a fourth camera lens, a fourth camera body, a fourth camera light source group, and a fourth camera mounting assembly. The fourth camera lens, the fourth camera body, and the fourth camera light source group are sequentially mounted on the fourth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

6. The defect detection system for cylindrical batteries according to claim 5, characterized in that, The fourth camera light source group includes a second parallel coaxial light source, a first strobe ring light source, and a second strobe ring light source. The second parallel coaxial light source, the first strobe ring light source, and the second strobe ring light source are sequentially mounted on the fourth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

7. The defect detection system for cylindrical batteries according to any one of claims 1-4, characterized in that, The third image acquisition device includes at least one fifth camera. The fifth camera includes a fifth camera lens, a fifth camera body, a fifth camera light source group, and a fifth camera mounting assembly. The fifth camera lens, the fifth camera body, and the fifth camera light source group are sequentially mounted on the fifth camera mounting assembly along the direction close to the negative electrode surface of the cylindrical battery.

8. The defect detection system for cylindrical batteries according to claim 7, characterized in that, The fifth camera light source group includes a third parallel coaxial light source, a third strobe ring light source, and a fourth strobe ring light source. The third parallel coaxial light source, the third strobe ring light source, and the fourth strobe ring light source are sequentially mounted on the fifth camera mounting assembly along the direction close to the positive electrode surface of the cylindrical battery.

9. A detection method based on the defect detection system of a cylindrical battery according to any one of claims 1-8, characterized in that, include: The positive and negative electrode images of the cylindrical battery to be inspected are acquired. The positive electrode image is acquired by a first vision inspection system and includes a first electrode surface image and an insulating ring image. The negative electrode image is acquired by a second vision inspection system and includes a second electrode surface image and an insulating layer image. Based on the positive electrode image, the positive electrode defect detection information of the cylindrical battery is determined, and based on the negative electrode image, the negative electrode defect detection information of the cylindrical battery is determined.

10. A detection device for a defect detection system of a cylindrical battery, characterized in that, To implement the detection method as described in claim 9, comprising: The acquisition module is used to acquire positive and negative electrode images of the cylindrical battery to be inspected. The positive electrode image is acquired by a first vision inspection system and includes a first electrode surface image and an insulating ring image. The negative electrode image is acquired by a second vision inspection system and includes a second electrode surface image and an insulating layer image. The processing module is used to determine the positive electrode defect detection information of the cylindrical battery based on the positive electrode image, and to determine the negative electrode defect detection information of the cylindrical battery based on the negative electrode image.

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