Surface defect detection device for electrode foil production and detection method thereof

Abstract

The invention discloses a surface defect detection device for electrode foil production and a detection method thereof, and relates to the technical field of electrode foil detection.The surface defect detection device comprises a detection box, rollers are arranged on the two sides of the inner wall of the detection box, and two adjusting mechanisms are arranged in the detection box; electrode foils are wound on the outer surfaces of the two adjusting mechanisms and the roller, and a support frame is arranged at the top of the inner wall of the detection box. The electrode foil makes contact with the outer surface of the heated mounting shell in the conveying process and is preheated by heat transfer, the preheating treatment enables the electrode foil material to slightly change due to thermal expansion, and therefore the internal defects of the electrode foil material become more obvious, and the service life of the electrode foil material is prolonged. The defects are more accurately identified and positioned in the subsequent detection step through the obvious defects, so that the detection accuracy and reliability are improved, the defects of the preheated electrode foil are more easily captured by a detection mechanism, and the conditions of missing detection or false detection caused by unobvious defects are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrode foil detection, and in particular to a surface defect detection device and a detection method for electrode foil production. Background Art

[0002] For example, the publication number is CN114047189A, and its name is a surface defect laser detection device and detection method for electrode foil production, which relates to the field of electrode foil laser detection technology. It is to solve the problem that the existing electrode foil surface defect laser detector needs to replace the electrode foils one by one each time, resulting in low detection efficiency.

[0003] During the inspection of the electrode foil, smaller defects inside the electrode foil are not easily exposed on its surface, resulting in missed detection or false detection due to the unclear defects. In addition, the internal quality problems of the cavity, uneven thickness and metal impurities generated inside the electrode foil cannot be discovered only through surface inspection. In order to solve the above problems, the present application provides a surface defect detection device and a detection method for electrode foil production to meet the needs. Summary of the invention

[0004] The purpose of the present application is to provide a surface defect detection device and a detection method for electrode foil production, which can effectively solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a surface defect detection device for electrode foil production, comprising a detection box, rollers are arranged on both sides of the inner wall of the detection box, two adjustment mechanisms are arranged inside the detection box, electrode foil is wound around the outer surfaces of the two adjustment mechanisms and the rollers, a support frame is arranged on the top of the inner wall of the detection box, a detection mechanism for detecting surface defects of the electrode foil is arranged at the lower end of the support frame, a light-transmitting mechanism for cooperating with the support frame to detect surface defects of the electrode foil is arranged inside the detection box, and the light-transmitting mechanism is located between the two adjustment mechanisms, the detection mechanism is located directly above the light-transmitting mechanism, a heat treatment mechanism is arranged inside the detection box and between one of the adjustment mechanisms and the rollers, the heat treatment mechanism is used to heat the electrode foil and cooperate with the adjustment mechanism to increase its ductility to amplify the defects on the surface of the electrode foil, and the electrode foil passes through the heat treatment mechanism and passes between the detection mechanism and the light-transmitting mechanism.

[0006] Among them, the adjustment mechanism includes two first slide blocks, the two first slide blocks are fixedly installed on the inner wall of the detection box, the first sliders are slidably installed inside the two first slide blocks, a support rod is arranged between the two first sliders, a sleeve is rotatably installed on the outer surface of the support rod, and a first spring is arranged at the bottom of the two first sliders, and the electrode foil is in contact with the outer surface of the sleeve.

[0007] Among them, the heat treatment mechanism includes an air guide shell and a mounting shell, a heating plate is arranged inside the mounting shell, fan blades are arranged at the bottom of the mounting shell, support plates are arranged on both sides of the mounting shell, and the two support plates are fixedly mounted on the inner wall of the detection box.

[0008] Wherein, air guide plates are arranged on both sides of the air guide shell, ventilation pipes are arranged on both sides of the air guide shell and the mounting shell, and the electrode foil is located between the mounting shell and the air guide shell, and the electrode foil contacts the outer surface of the mounting shell.

[0009] Wherein, the detection mechanism includes a shell, an installation box is arranged in the middle of the inner wall of the shell, light-transmitting curved plates are arranged on both sides of the inner wall of the installation box, a surface detection lens is arranged between the two light-transmitting curved plates, and a fill light is arranged on the inner wall of the installation box to fill in the light for the surface detection lens to detect surface defects of the electrode foil. The shell is fixedly installed at the lower end of the support frame, and baffles are arranged on both sides of the shell.

[0010] Wherein, a light-transmitting lens and a foreign matter detection lens are respectively arranged on the inner wall of the shell and on both sides of the installation box, and the shell is located above the electrode foil.

[0011] Among them, the light-transmitting mechanism includes a chassis, both sides of the chassis are provided with installation grooves, transparent plates are arranged inside the two installation grooves, a detection camera is arranged at the bottom of the chassis, and a strong light box and a light-transmitting box are arranged on both sides of the chassis, and auxiliary rollers are arranged on one side of the strong light box and the light-transmitting box.

[0012] Among them, the light-transmitting mechanism includes four second slide blocks fixedly installed on the inner wall of the detection box, connecting plates are provided on both sides of the chassis, two second sliders are symmetrically provided on one side of the two connecting plates, and the second sliders are slidably installed inside the second slide block, and second springs are provided at the bottom of the four second sliders.

[0013] Wherein, the light-transmitting box is located directly above the light-transmitting lens, and the strong light box is located directly above the foreign body detection lens.

[0014] A detection method for a surface defect detection device for electrode foil production, the specific detection steps of the electrode foil are as follows: S1. When inspecting the produced electrode foil, the electrode foil first passes through the roller and then passes through the heat treatment mechanism. When the electrode foil passes through the heat treatment mechanism, the heat treatment mechanism will preheat the produced electrode foil and then heat it. Since the produced electrode foil is thin, the heat treatment mechanism can quickly heat the electrode foil. After heating, the defects of the electrode foil will become more obvious due to the change in thermal expansion of the material, so that it is easier to be detected by the subsequent inspection mechanism and the light transmission mechanism. In addition, when the heated electrode foil passes through the light transmission mechanism for inspection, it is easier to capture the temperature deviation on the electrode foil, so as to accurately identify the small defects on the surface, such as bulges, agglomerates, material dropouts, pinholes, metal foreign matter and uneven coating defects; S2, the electrode foil heated by the heat treatment mechanism enters between the detection mechanism and the light transmission mechanism after being guided by the adjustment mechanism, and the adjustment mechanism provided when the electrode foil passes through the adjustment mechanism can adaptively stretch and tension the electrode foil according to the conveying speed of the electrode foil, and the stretched electrode foil enters between the detection mechanism and the light transmission mechanism; S3. When the electrode foil enters between the detection mechanism and the light-transmitting mechanism, the light-transmitting mechanism irradiates the electrode foil with two light intensities, and then the detection mechanism detects production defects of the electrode foil according to the different light intensities irradiated by the light-transmitting mechanism. The detection mechanism detects defects such as bulges, agglomerates, pinholes, metal foreign matter and uneven coating generated during the production of the electrode foil according to the different light intensities irradiated by the light-transmitting mechanism.

[0015] In summary, the technical effects and advantages of the present invention are as follows: 1. The electrode foil provided in the present invention contacts the outer surface of the heated mounting shell during transportation and is preheated by heat transfer. The preheating treatment causes the electrode foil material to undergo slight changes due to thermal expansion, and its internal defects become more obvious. The obvious defects help subsequent detection steps to more accurately identify and locate these defects, thereby improving the accuracy and reliability of detection. The electrode foil after the preheating treatment is more easily captured by the detection mechanism, reducing the missed detection or false detection caused by unclear defects.

[0016] 2. The light irradiated by the light-transmitting box provided in the present invention can penetrate the electrode foil. When there are pinholes on the surface of the electrode foil, the light can penetrate these holes and be captured by the camera, thereby accurately detecting the existence of the pinholes. The design of the outer shell and the baffle makes the space where the light-transmitting lens and the foreign matter detection lens are located in a dark room, avoiding interference from external light and improving the accuracy of detection. The foreign matter detection lens, as a photosensitive camera, can clearly detect the light penetrating the electrode foil, thereby identifying metal debris or uneven thickness problems inside the electrode foil; the strong light irradiated by the strong light box makes it easier for the light-transmitting lens in the dark room to detect quality problems inside the electrode foil, such as cavity bubbles and uneven thickness. The light-transmitting lens detects the quality inside the electrode foil according to the penetration intensity of the light.

[0017] 3. When the electrode foil provided in the present invention passes through the upper part of the chassis, after the electrode foil is heated by the heat treatment mechanism, the detection camera provided can more easily capture the temperature deviation of the electrode foil surface through the existing infrared IR thermal imaging technology, thereby accurately identifying the tiny surface defects such as bulges, agglomerates, falling materials, pinholes, metal foreign matter and uneven coating, and the transparent plate provided can change the light irradiated by the light-transmitting box and the strong light box, so that the light irradiated to the internal space of the chassis is softer, which is convenient for the detection camera to detect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a surface defect detection device for electrode foil production from a first perspective; Figure 2 A schematic diagram of the third perspective structure of a surface defect detection device for electrode foil production; Figure 3 It is a cross-sectional view of the three-dimensional connection structure of the surface defect detection device for electrode foil production; Figure 4 It is a schematic diagram of the internal three-dimensional connection structure of the surface defect detection device for electrode foil production; Figure 5 It is a schematic diagram of the three-dimensional connection structure of the detection mechanism, the adjustment mechanism and the light transmission mechanism; Figure 6 It is a schematic diagram of the three-dimensional connection structure of the adjustment mechanism and the light transmission mechanism; Figure 7 It is a schematic diagram of the three-dimensional connection structure of the adjustment mechanism; Figure 8 It is a schematic diagram of the three-dimensional connection structure of the heat treatment mechanism; Fig. 9 It is a schematic diagram of the three-dimensional connection structure of the installation shell and the heating plate; Fig.10 It is a cross-sectional view of the three-dimensional connection structure of the mounting shell; Fig.11 It is a schematic diagram of the three-dimensional connection structure of the installation shell and the ventilation pipe; Fig.12 It is a schematic diagram of the three-dimensional connection structure of the air guide piece and the air guide piece; Fig.13 It is a schematic diagram of the first-person perspective three-dimensional connection structure of the detection mechanism; Fig.14 It is a schematic diagram of the second-view stereoscopic connection structure of the detection mechanism; Fig.15 It is a cross-sectional view of the three-dimensional connection structure of the detection mechanism; Fig.16 It is a schematic diagram of the three-dimensional connection structure of the light-transmitting mechanism from a first-person perspective; Fig.17 It is a schematic diagram of the second viewing angle three-dimensional connection structure of the light transmission mechanism; Fig.18 It is a schematic diagram of the partial three-dimensional connection structure of the light-transmitting mechanism.

[0020] In the figure: 1. detection box; 2. heat treatment mechanism; 21. air guide shell; 22. air guide plate; 23. ventilation pipe; 24. support plate; 25. installation shell; 26. fan blade; 27. heating plate; 3. electrode foil; 4. support frame; 5. detection mechanism; 51. baffle; 52. shell; 53. light-transmitting lens; 54. foreign body detection lens; 55. installation box; 56. light-transmitting curved plate; 57. surface detection lens; 58. Fill light; 6. Adjustment mechanism; 61. Sleeve; 62. Support rod; 63. First slider; 64. First spring; 65. First slide block; 7. Light transmission mechanism; 71. Auxiliary roller; 72. Second slide block; 73. Connecting plate; 74. Light transmission box; 75. Transparent plate; 76. Chassis; 77. High light box; 78. Second spring; 79. Second slider; 711. Mounting slot; 712. Detection camera; 8. Roller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1, Reference Figures 1 to 18 A surface defect detection device for electrode foil production shown in the figure comprises a detection box 1, rollers 8 are arranged on both sides of the inner wall of the detection box 1, two adjustment mechanisms 6 are arranged inside the detection box 1, and the outer surfaces of the two adjustment mechanisms 6 and the rollers 8 are wound with electrode foil 3, a support frame 4 is arranged on the top of the inner wall of the detection box 1, and a detection mechanism 5 for detecting surface defects of the electrode foil 3 is arranged at the lower end of the support frame 4, a light-transmitting mechanism 7 for cooperating with the support frame 4 to detect surface defects of the electrode foil 3 is arranged inside the detection box 1, and the light-transmitting mechanism 7 is located between the two adjustment mechanisms 6, and the detection mechanism 5 is located directly above the light-transmitting mechanism 7, a heat treatment mechanism 2 is arranged inside the detection box 1 and between one of the adjustment mechanisms 6 and the rollers 8, the heat treatment mechanism 2 is used to heat the electrode foil 3 and cooperate with the adjustment mechanism 6 to increase its ductility and amplify the defects on the surface of the electrode foil 3, and the electrode foil 3 passes through the heat treatment mechanism 2 and passes between the detection mechanism 5 and the light-transmitting mechanism 7.

[0023] It is worth noting that when the produced electrode foil 3 is inspected, the electrode foil 3 first passes through the roller 8 and then passes through the heat treatment mechanism 2. When the electrode foil 3 passes through the heat treatment mechanism 2, the heat treatment mechanism 2 will preheat the produced electrode foil 3 and then heat it. Since the produced electrode foil 3 is thin, the heat treatment mechanism 2 can quickly heat the electrode foil 3. After heating, the defects of the electrode foil 3 will become more obvious due to the change in thermal expansion of the material, so that it is easier to be detected by the subsequent inspection mechanism 5 and the light transmission mechanism 7. Moreover, when the heated electrode foil 3 passes through the light transmission mechanism 7 for inspection, it is easier to capture the temperature deviation on the electrode foil 3, so as to accurately identify the small defects on the surface, such as bulges, agglomerates, dropped materials, pinholes, metal foreign matter and uneven coating defects. Among them, the electrode foil 3 is first preheated in the heat treatment mechanism 2 and then quickly heated. Since the thickness of the electrode foil is relatively thin, the heating process is faster and more efficient. After heating, the electrode foil 3 changes due to the thermal expansion of the material, and its internal defects such as bulges, agglomerates, material dropouts, pinholes, metal foreign matter and uneven coating will become more obvious, making it easier to identify and locate these defects in the subsequent detection process.

[0024] The electrode foil 3 heated by the heat treatment mechanism 2 enters between the detection mechanism 5 and the light transmission mechanism 7 after being guided by the adjustment mechanism 6. When the electrode foil 3 passes through the adjustment mechanism 6, the adjustment mechanism 6 can adaptively stretch and tension the electrode foil 3 according to the conveying speed of the electrode foil 3. The stretched electrode foil 3 enters between the detection mechanism 5 and the light transmission mechanism 7. When the electrode foil 3 enters between the detection mechanism 5 and the light-transmitting mechanism 7, the light-transmitting mechanism 7 irradiates the electrode foil 3 with two light intensities, and then the detection mechanism 5 detects the production defects of the electrode foil 3 according to the different light intensities irradiated by the light-transmitting mechanism 7. The detection mechanism 5 detects the defects of bulges, agglomerates, pinholes, metal foreign matter and uneven coating generated during the production of the electrode foil 3 according to the different light intensities irradiated by the light-transmitting mechanism 7.

[0025] The adjusting mechanism 6 can adaptively stretch and tension the electrode foil 3 according to the conveying speed. The adaptive capability ensures that the electrode foil maintains stable tension and shape during the conveying process, avoids deformation or wrinkles caused by uneven tension, and thus improves the accuracy of detection.

[0026] The surface of the electrode foil 3 after tensioning is smoother, so that the detection mechanism 5 can more accurately capture the tiny defects on the electrode foil, and the light transmission mechanism 7 illuminates the electrode foil through two different light intensities. The multi-light intensity detection method can more comprehensively reveal the different defect characteristics on the electrode foil, further improving the detection accuracy and reliability.

[0027] The detection mechanism 5 can detect various production defects on the electrode foil 3 according to the different light intensities irradiated by the light transmission mechanism 7, including bulges, agglomerates, pinholes, metal foreign matter and uneven coating. The diversified defect recognition capabilities enable the detection to cope with more complex detection needs.

[0028] Embodiment 2: Based on the heat treatment mechanism 2 and the adjustment mechanism 6 described in Embodiment 1, this embodiment provides a further technical solution for the heat treatment mechanism 2 and the adjustment mechanism 6.

[0029] The heat treatment mechanism 2 includes an air guide shell 21 and a mounting shell 25. A heating plate 27 is arranged inside the mounting shell 25. Fan blades 26 are arranged at the bottom of the mounting shell 25. Support plates 24 are arranged on both sides of the mounting shell 25. The two support plates 24 are fixedly mounted on the inner wall of the detection box 1.

[0030] Air guide plates 22 are provided on both sides of the air guide shell 21 , ventilation pipes 23 are provided on both sides of the air guide shell 21 and the mounting shell 25 , and the electrode foil 3 is located between the mounting shell 25 and the air guide shell 21 , and the electrode foil 3 contacts the outer surface of the mounting shell 25 .

[0031] It is worth noting that the electrode foil 3 is first fed into between the air guide shell 21 and the mounting shell 25 by the roller 8. During the transportation of the electrode foil 3, the heating plate 27 heats and transfers the temperature to the mounting shell 25, and the electrode foil 3 contacts the outer surface of the mounting shell 25. During the transportation of the electrode foil 3, the transported electrode foil 3 will be heated, and the fan blades 26 rotate to supply air to the inside of the mounting shell 25. The hot air of the mounting shell 25 will be blown into the air guide shell 21 through the vent pipe 23. The hot air is guided by the air guide plate 22 and blown onto the upper surface of the electrode foil 3. The electrode foil 3 is preheated by the hot air to change the thermal expansion of the material, and the defect energy will become more obvious, thus being easier to detect.

[0032] Among them, the electrode foil 3 contacts the outer surface of the heated mounting shell 25 during the transportation process and is preheated by the heat transfer. The preheating treatment causes the electrode foil material to undergo slight changes due to thermal expansion, and its internal defects become more obvious. The obvious defects help the subsequent detection steps to more accurately identify and locate these defects, thereby improving the accuracy and reliability of the detection. The electrode foil 3 after the preheating treatment is more easily captured by the detection mechanism, reducing the missed detection or false detection caused by the unclear defects.

[0033] The adjustment mechanism 6 includes two first slide blocks 65, and the two first slide blocks 65 are fixedly installed on the inner wall of the detection box 1. The first sliders 63 are slidably installed inside the two first slide blocks 65. A support rod 62 is arranged between the two first sliders 63. A sleeve 61 is rotatably installed on the outer surface of the support rod 62. A first spring 64 is arranged at the bottom of the two first sliders 63, and the electrode foil 3 is in contact with the outer surface of the sleeve 61.

[0034] It is worth noting that, after the electrode foil 3 has been heated by the above-mentioned mounting shell 25, the electrode foil 3 will be conveyed from the surface of the sleeve 61, and the sleeve 61 will rotate on the outer surface of the support rod 62. When conveying the electrode foil 3, the height of the sleeve 61 can adjust the tension of the electrode foil 3 according to the conveying speed of the electrode foil 3. The height change of the sleeve 61 is achieved by driving the first slider 63 to slide inside the first slide block 65 through the support rod 62, so that the first slider 63 squeezes the first spring 64 to contract. The electrode foil 3 is tensioned by the sleeve 61 to prevent the electrode foil 3 from wrinkling or loosening during the detection by the detection mechanism 5 and the light transmission mechanism 7, which affects the detection result of the surface of the electrode foil 3.

[0035] Among them, the sleeve 61 can adjust its height according to the conveying speed of the electrode foil 3, so as to realize adaptive control of the tension degree of the electrode foil. The adaptive ability ensures that the electrode foil always maintains stable tension and shape during the conveying process. The support rod 62 drives the first slider 63 to slide inside the first slide block 65, and the first spring 64 contracts, so as to realize flexible adjustment of the height of the sleeve 61.

[0036] The tensioned electrode foil 3 is not prone to wrinkles or looseness during transportation, so as to maintain the flatness of the electrode foil surface and avoid detection errors caused by shape changes.

[0037] Embodiment 3: Based on the detection mechanism 5 and light transmission mechanism 7 proposed in Embodiment 1, this embodiment provides a further technical solution for the detection mechanism 5 and light transmission mechanism 7.

[0038] The light-transmitting mechanism 7 includes a chassis 76, both sides of which are provided with mounting grooves 711, transparent plates 75 are arranged inside the two mounting grooves 711, a detection camera 712 is arranged at the bottom of the chassis 76, and a strong light box 77 and a light-transmitting box 74 are arranged on both sides of the chassis 76, and auxiliary rollers 71 are arranged on one side of the strong light box 77 and the light-transmitting box 74.

[0039] The light-transmitting mechanism 7 includes four second slide blocks 72 fixedly mounted on the inner wall of the detection box 1, connecting plates 73 are arranged on both sides of the chassis 76, two second sliders 79 are symmetrically arranged on one side of the two connecting plates 73, and the second sliders 79 are slidably mounted inside the second slide blocks 72, and second springs 78 are arranged at the bottom of the four second sliders 79.

[0040] It is worth noting that, when in use, the electrode foil 3 is heated and passes through the surface of the sleeve 61, and then passes through the top of the strong light box 77 and the light-transmitting box 74 under the guidance of the auxiliary roller 71. The auxiliary roller 71 is provided to ensure that the transported electrode foil 3 does not contact the upper end of the light-transmitting box 74 when the electrode foil 3 is tensioned and the sleeve 61 is offset. When the auxiliary roller 71 is subjected to the tensioning force of the electrode foil 3, the auxiliary roller 71 drives the connecting plate 73 to slide inside the second slide block 72 through the second slider 79 through the light-transmitting box 74 and the strong light box 77. Since the connecting plate 73 is fixedly connected to the strong light box 77 and the light-transmitting box 74, when the height of the connecting plate 73 changes, the positions of the strong light box 77 and the light-transmitting box 74 will also be driven to change, so that the strong light box 77 and the light-transmitting box 74 can be adjusted according to the height position of the sleeve 61. The electrode foil 3 first passes through the upper part of the light-transmitting box 74 and then passes through the transparent plate 75 and the strong light box 77 in sequence. When the electrode foil 3 passes through the light-transmitting box 74, the light intensity inside the light-transmitting box 74 is not enough to penetrate the electrode foil 3. When pinholes are generated on the surface of the electrode foil 3, the light irradiated by the light-transmitting box 74 will penetrate the holes on the surface of the electrode foil 3. When the electrode foil 3 passes over the upper part of the chassis 76, because the electrode foil 3 is heated by the heat treatment mechanism 2, the detection camera 712 is set to more easily capture the temperature deviation on the surface of the electrode foil 3 through the existing infrared IR thermal imaging technology, so as to accurately identify the tiny defects on the surface, such as bulges, agglomerates, falling materials, pinholes, metal foreign matter and uneven coating, and the transparent plate 75 is set to change the light irradiated by the light-transmitting box 74 and the strong light box 77, so that the light is softer when it is irradiated to the internal space of the chassis 76. When the electrode foil 3 passes over the top of the strong light box 77, the strong light box 77 irradiates strong light, making it easier for the light to penetrate the electrode foil 3.

[0041] The detection mechanism 5 includes a shell 52, and an installation box 55 is arranged in the middle of the inner wall of the shell 52. Light-transmitting curved plates 56 are arranged on both sides of the inner wall of the installation box 55. A surface detection lens 57 is arranged between the two light-transmitting curved plates 56. The inner wall of the installation box 55 is provided with a fill light 58 for the surface detection lens 57 to fill light and detect surface defects of the electrode foil 3. The shell 52 is fixedly installed at the lower end of the support frame 4, and baffles 51 are arranged on both sides of the shell 52.

[0042] A light-transmitting lens 53 and a foreign matter detection lens 54 are respectively provided on the inner wall of the housing 52 and on both sides of the mounting box 55 . The housing 52 is located above the electrode foil 3 .

[0043] The light-transmitting box 74 is located directly above the light-transmitting lens 53 , and the strong light box 77 is located directly above the foreign matter detection lens 54 .

[0044] It is worth noting that, when in use, when the light irradiated by the light-transmitting box 74 penetrates the electrode foil 3, the light-transmitting lens 53 located on the upper part of the light-transmitting box 74 can detect the penetrated light through the camera. When a pinhole appears on the surface of the electrode foil 3, the light penetrates the electrode foil 3. The housing 52 is located above the electrode foil 3 and the baffle 51 is used to block the light on both sides of the electrode foil 3, so that the space where the light-transmitting lens 53 and the foreign matter detection lens 54 are located is in a dark room. The foreign matter detection lens 54 is a photosensitive camera of the prior art, which can clearly detect the light penetrating the electrode foil 3 and thus detect whether there is a pinhole in the electrode foil 3 during production. When the electrode foil 3 passes under the installation box 55, the surface detection lens 57 can detect whether the upper surface of the electrode foil 3 is oxidized or the coating is peeled off, and the provided supplementary light 58 irradiates light through the light-transmitting curved plate 56, so that the light can be softly irradiated on the surface of the electrode foil 3 to provide a good lighting environment for the observation of the surface detection lens 57; When the electrode foil 3 passes under the light-transmitting lens 53, the strong light irradiated by the strong light box 77 makes it easier for the light-transmitting lens 53 in the dark room to detect whether there are metal impurities or uneven thickness inside the electrode foil 3. When the electrode foil 3 is produced with uneven thickness or has cavities and bubbles inside, the strong light box 77 penetrates the electrode foil 3, causing uneven shadow surfaces or shadow points to appear on the electrode foil 3. The set light-transmitting lens 53 can detect the internal quality problems of the electrode foil 3 during production according to the penetration intensity of the light.

[0045] The light irradiated by the light-transmitting box 74 can penetrate the electrode foil 3. When there are pinholes on the surface of the electrode foil, the light can penetrate these holes and be captured by the camera, thereby accurately detecting the existence of the pinholes. The design of the housing 52 and the baffle 51 makes the space where the light-transmitting lens 53 and the foreign matter detection lens 54 are located in a dark room, avoiding interference from external light and improving the accuracy of detection. The foreign matter detection lens 54, as a photosensitive camera, can clearly detect the light penetrating the electrode foil 3, thereby identifying the problem of metal impurities or uneven thickness inside the electrode foil 3; The strong light emitted by the strong light box 77 makes it easier for the light-transmitting lens 53 in the dark room to detect the quality problems inside the electrode foil 3, such as cavity bubbles and uneven thickness. The light-transmitting lens 53 detects the quality inside the electrode foil 3 according to the penetration intensity of the light.

[0046] The present invention also provides a detection method of a surface defect detection device for electrode foil production, and the specific detection steps of the electrode foil are as follows: S1. When inspecting the produced electrode foil 3, the electrode foil 3 first passes through the roller 8 and then passes through the heat treatment mechanism 2. When the electrode foil 3 passes through the heat treatment mechanism 2, the heat treatment mechanism 2 will preheat the produced electrode foil 3 and then heat it. Since the produced electrode foil 3 is thin, the heat treatment mechanism 2 can quickly heat the electrode foil 3. After heating, the defects of the electrode foil 3 will become more obvious due to the change in thermal expansion of the material, so that it is easier to be detected by the subsequent inspection mechanism 5 and the light transmission mechanism 7. Moreover, when the heated electrode foil 3 passes through the light transmission mechanism 7 for inspection, it is easier to capture the temperature deviation on the electrode foil 3, so as to accurately identify the small defects on the surface, such as bulges, agglomerates, material dropouts, pinholes, metal foreign matter and uneven coating defects; S2, the electrode foil 3 heated by the heat treatment mechanism 2 enters between the detection mechanism 5 and the light transmission mechanism 7 after being guided by the adjustment mechanism 6, and the adjustment mechanism 6 provided when the electrode foil 3 passes through the adjustment mechanism 6 can adaptively stretch and tension the electrode foil 3 according to the conveying speed of the electrode foil 3, and the stretched electrode foil 3 enters between the detection mechanism 5 and the light transmission mechanism 7; S3. When the electrode foil 3 enters between the detection mechanism 5 and the light-transmitting mechanism 7, the light-transmitting mechanism 7 irradiates the electrode foil 3 with two light intensities, and then the detection mechanism 5 detects the production defects of the electrode foil 3 according to the different light intensities irradiated by the light-transmitting mechanism 7. The detection mechanism 5 detects the defects of bulges, agglomerates, pinholes, metal foreign matter and uneven coating generated during the production of the electrode foil 3 according to the different light intensities irradiated by the light-transmitting mechanism 7.

[0047] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A surface defect detection device for electrode foil production, comprising a detection box (1), characterized in that: Rollers (8) are arranged on both sides of the inner wall of the detection box (1), two adjustment mechanisms (6) are arranged inside the detection box (1), and the outer surfaces of the two adjustment mechanisms (6) and the rollers (8) are wound with electrode foils (3), a support frame (4) is arranged on the top of the inner wall of the detection box (1), and a detection mechanism (5) for detecting surface defects of the electrode foil (3) is arranged at the lower end of the support frame (4), and a light transmission mechanism (7) for cooperating with the support frame (4) to detect surface defects of the electrode foil (3) is arranged inside the detection box (1), and the light transmission mechanism (7) is arranged inside the detection box (1). The light mechanism (7) is located between the two adjustment mechanisms (6), the detection mechanism (5) is located directly above the light transmission mechanism (7), and a heat treatment mechanism (2) is provided inside the detection box (1) and between one of the adjustment mechanisms (6) and the roller (8). The heat treatment mechanism (2) is used to heat the electrode foil (3) and cooperate with the adjustment mechanism (6) to increase its ductility and amplify the defects on the surface of the electrode foil (3). The electrode foil (3) passes through the heat treatment mechanism (2) and passes between the detection mechanism (5) and the light transmission mechanism (7).

2. The surface defect detection device for electrode foil production according to claim 1, characterized in that: The adjustment mechanism (6) comprises two first slide blocks (65), the two first slide blocks (65) are fixedly mounted on the inner wall of the detection box (1), the first sliders (63) are slidably mounted inside the two first slide blocks (65), a support rod (62) is arranged between the two first sliders (63), a sleeve (61) is rotatably mounted on the outer surface of the support rod (62), a first spring (64) is arranged at the bottom of the two first sliders (63), and the electrode foil (3) is in contact with the outer surface of the sleeve (61).

3. The surface defect detection device for electrode foil production according to claim 1, characterized in that: The heat treatment mechanism (2) comprises an air guide shell (21) and a mounting shell (25); a heating plate (27) is arranged inside the mounting shell (25); a fan blade (26) is arranged at the bottom of the mounting shell (25); support plates (24) are arranged on both sides of the mounting shell (25); and the two support plates (24) are fixedly mounted on the inner wall of the detection box (1).

4. The surface defect detection device for electrode foil production according to claim 3, characterized in that: Air guide plates (22) are provided on both sides of the air guide shell (21), ventilation pipes (23) are provided on both sides of the air guide shell (21) and the mounting shell (25), and the electrode foil (3) is located between the mounting shell (25) and the air guide shell (21), and the electrode foil (3) is in contact with the outer surface of the mounting shell (25).

5. The surface defect detection device for electrode foil production according to claim 1, characterized in that: The detection mechanism (5) comprises a housing (52), a mounting box (55) is arranged in the middle of the inner wall of the housing (52), light-transmitting curved plates (56) are arranged on both sides of the inner wall of the mounting box (55), a surface detection lens (57) is arranged between the two light-transmitting curved plates (56), and a fill light (58) is arranged on the inner wall of the mounting box (55) for filling light for the surface detection lens (57) to detect surface defects of the electrode foil (3). The housing (52) is fixedly mounted on the lower end of the support frame (4), and baffles (51) are arranged on both sides of the housing (52).

6. The surface defect detection device for electrode foil production according to claim 5, characterized in that: A light-transmitting lens (53) and a foreign matter detection lens (54) are respectively arranged on the inner wall of the housing (52) and on both sides of the installation box (55); the housing (52) is located above the electrode foil (3).

7. The surface defect detection device for electrode foil production according to claim 1, characterized in that: The light-transmitting mechanism (7) comprises a chassis (76), both sides of the chassis (76) are provided with mounting grooves (711), transparent plates (75) are arranged inside the two mounting grooves (711), a detection camera (712) is arranged at the bottom of the chassis (76), a strong light box (77) and a light-transmitting box (74) are arranged on both sides of the chassis (76), and auxiliary rollers (71) are arranged on one side of each of the strong light box (77) and the light-transmitting box (74).

8. The surface defect detection device for electrode foil production according to claim 7, characterized in that: The light transmission mechanism (7) comprises four second slide blocks (72) fixedly mounted on the inner wall of the detection box (1), connecting plates (73) are provided on both sides of the box (76), two second sliders (79) are symmetrically provided on one side of the two connecting plates (73), and the second sliders (79) are slidably mounted inside the second slide blocks (72), and second springs (78) are provided at the bottom of the four second sliders (79).

9. The surface defect detection device for electrode foil production according to claim 7, characterized in that: The light-transmitting box (74) is located directly above the light-transmitting lens (53), and the strong light box (77) is located directly above the foreign matter detection lens (54).

10. A detection method using the surface defect detection device for electrode foil production according to any one of claims 1 to 9, characterized in that: The specific detection steps of electrode foil are as follows: S1. When inspecting the produced electrode foil (3), the electrode foil (3) first passes through the roller (8) and then passes through the heat treatment mechanism (2). When the electrode foil (3) passes through the heat treatment mechanism (2), the heat treatment mechanism (2) preheats the produced electrode foil (3) and then heats it. Since the produced electrode foil (3) is thin, the heat treatment mechanism (2) can quickly heat the electrode foil (3). After heating, the defects of the electrode foil (3) become more obvious due to the change in thermal expansion of the material, thereby being more easily detected by the subsequent inspection mechanism (5) and the light transmission mechanism (7). Moreover, when the heated electrode foil (3) passes through the light transmission mechanism (7) for inspection, the temperature deviation on the electrode foil (3) can be more easily captured, thereby accurately identifying the tiny defects on the surface, such as bulges, agglomerates, dropouts, pinholes, metal foreign matter, and uneven coating defects. S2, the electrode foil (3) heated by the heat treatment mechanism (2) enters between the detection mechanism (5) and the light transmission mechanism (7) after being guided by the adjustment mechanism (6), and the adjustment mechanism (6) provided when the electrode foil (3) passes through the adjustment mechanism (6) can adaptively stretch and tension the electrode foil (3) according to the conveying speed of the electrode foil (3), and the tensioned electrode foil (3) enters between the detection mechanism (5) and the light transmission mechanism (7); S3. When the electrode foil (3) enters between the detection mechanism (5) and the light transmission mechanism (7), the light transmission mechanism (7) irradiates the electrode foil (3) with two light intensities, and then the detection mechanism (5) detects production defects of the electrode foil (3) in accordance with the different light intensities irradiated by the light transmission mechanism (7). The detection mechanism (5) detects defects such as bulges, agglomerates, pinholes, metal foreign matter, and uneven coating generated during the production of the electrode foil (3) according to the different light intensities irradiated by the light transmission mechanism (7).

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