Visual inspection devices and appearance inspection equipment

Abstract

The present invention discloses a visual inspection device, which includes a core surface inspection mechanism, a side inspection mechanism and a tab inspection mechanism. The core surface inspection mechanism is used for inspection of the front and back sides of the battery cell, the side inspection mechanism is used for inspection of the side of the battery cell, and the tab inspection mechanism is used for inspection of the tab of the battery cell. The present invention also provides an appearance inspection device, which includes a loading mechanism, a transmission mechanism, a core surface inspection mechanism, a side inspection mechanism, a tab inspection mechanism and a discharging mechanism. The loading mechanism is used for loading the battery cell, the transmission mechanism is used for transmission of the battery cell, and the discharging mechanism is used for unloading the battery cell. The invention of the present application replaces the manual inspection of the appearance of the battery cell by setting the loading mechanism, the transmission mechanism, the core surface inspection mechanism, the side inspection mechanism, the tab inspection mechanism and the discharging mechanism, thereby avoiding misjudgment of the inspection, improving the inspection efficiency, and thus improving the production efficiency.

Description

[0001] This invention is applied for with Chinese patent application number 201910094271.0, the applicant is Guangdong Liyuanheng Intelligent Equipment Co., Ltd., and the invention name is "Visual inspection device and appearance inspection equipment" as the priority document. Technical Field

[0002] The present invention relates to the technical field of appearance inspection, and in particular to a visual inspection device and appearance inspection equipment. Background Art

[0003] During the production process of battery cells, it is inevitable that some defects will be caused to the appearance of some products, such as scratches, bumps, etc. The appearance defects of the battery cells will not only affect their appearance, but also affect the safety of the battery cells. Therefore, the appearance of the battery cells must be inspected. In the prior art, the appearance of the battery cells is inspected by manual inspection, which is easy to cause visual fatigue and misjudgment. At the same time, the manual inspection speed is slow, which affects production efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a visual inspection device and an appearance inspection equipment.

[0005] A visual inspection device includes: a core surface inspection mechanism, which includes a first imaging inspection member and a first imaging light source; the first imaging inspection member is used for imaging inspection of the front or back side of a battery core, the first imaging light source is used for providing illumination when imaging the front or back side of the battery core, and the illumination brightness of the first imaging light source gradually decreases from a direction away from the battery core to a direction close to the battery core;

[0006] A side detection mechanism, which is used for imaging detection of the side of the battery cell; and

[0007] A tab detection mechanism is used for imaging detection of the tabs of battery cells.

[0008] According to one embodiment of the present invention, it also includes a folded corner detection mechanism; the folded corner detection mechanism is used to detect the tail and folded corner of the battery cell.

[0009] According to one embodiment of the present invention, the first imaging detection component is located above the first imaging light source; the battery cell to be tested is located on the side of the first imaging light source away from the first imaging detection component, and the front or back side of the battery cell to be tested is opposite to the imaging end of the first imaging detection component.

[0010] According to one embodiment of the present invention, the core surface detection mechanism further includes an annular light source; the annular light source is located between the first imaging light source and the battery cell to be tested.

[0011] According to one embodiment of the present invention, the core surface detection mechanism further includes a first linear adjustment member; the output end of the first linear adjustment member is connected to the first imaging detection member, which is used to adjust the position of the first imaging detection member relative to the battery cell to be tested.

[0012] According to one embodiment of the present invention, the side detection mechanism includes a second imaging detection component and a second imaging light source; the second imaging detection component is used for imaging detection of the side of the battery cell, and the second imaging light source is used to provide lighting for imaging the side of the battery cell.

[0013] According to one embodiment of the present invention, the number of second imaging light sources is two groups; the two groups of second imaging light sources are respectively located on two opposite sides of the second imaging detection component; the imaging end of the second imaging detection component is opposite to the side of the battery cell to be tested, and the two groups of second imaging light sources respectively face the side of the battery cell to be tested.

[0014] According to one embodiment of the present invention, the side detection mechanism further includes a second linear adjustment member; the second linear adjustment member is used to adjust the position of the second imaging detection member relative to the battery cell to be tested.

[0015] According to one embodiment of the present invention, the tab detection mechanism includes a third imaging detection component and a third imaging light source; the third imaging detection component is used for imaging detection of the tab of the battery cell, and the third imaging light source is used to provide lighting for imaging the tab of the battery cell.

[0016] According to one embodiment of the present invention, the tab detection mechanism further includes a third linear adjustment member; the third linear adjustment member is used to adjust the position of the third imaging detection member relative to the tab of the battery cell to be tested.

[0017] According to one embodiment of the present invention, the corner detection mechanism includes a fourth imaging detection component and a fourth imaging light source; the fourth imaging detection component is used for imaging detection of the tail and corner of the battery cell, and the fourth imaging light source is used to provide lighting for imaging the tail and corner of the battery cell.

[0018] According to an embodiment of the present invention, the number of the fourth imaging detection components is two; the two fourth imaging detection components are respectively used to detect two corners of the tail of the battery cell.

[0019] According to an embodiment of the present invention, the corner detection mechanism further includes a corner background plate; the corner background plate is arranged to cover the battery cell to be tested.

[0020] According to an embodiment of the present invention, it further includes a head detection mechanism; the head detection mechanism is used for detecting the head of the battery cell.

[0021] An appearance inspection device comprises: a feeding mechanism, which is used for feeding battery cells;

[0022] A transmission mechanism, which receives the battery cells from the feeding mechanism and transmits the battery cells;

[0023] A visual inspection device, a core surface inspection mechanism, a side inspection mechanism and a tab inspection mechanism are respectively located around the transmission mechanism, and respectively perform visual inspections on the battery cells located in the transmission mechanism; and

[0024] The discharging mechanism discharges the battery cells inspected by the visual inspection device.

[0025] According to one embodiment of the present invention, it also includes a folded corner detection mechanism; the folded corner detection mechanism is located around the transmission mechanism, and is used to detect the tail and folded corner of the battery cell.

[0026] According to one embodiment of the present invention, it further includes a head detection mechanism; the head detection mechanism is located around the transmission mechanism and is used to detect the head of the battery cell.

[0027] According to one embodiment of the present invention, the transmission mechanism includes a first transmission mechanism, a transfer mechanism and a second transmission mechanism;

[0028] The feeding mechanism, the core surface detection mechanism, the side detection mechanism, the tab detection mechanism and the head detection mechanism are sequentially arranged along the transmission direction of the first transmission mechanism;

[0029] The transfer mechanism is located between the first transmission mechanism and the second transmission mechanism, and is used to flip the battery cells of the first transmission mechanism and move them to the second transmission mechanism;

[0030] The core surface detection mechanism, the side edge detection mechanism, the angle detection mechanism, the tab detection mechanism and the discharging mechanism are arranged in sequence along the transmission direction of the second transmission mechanism.

[0031] According to one embodiment of the present invention, it also includes a tab shaping mechanism; the tab shaping mechanism is located around the transmission mechanism and is used for shaping the tabs of the battery cell before detection.

[0032] According to one embodiment of the present invention, it further includes a dust removal mechanism; the dust removal mechanism is located around the transmission mechanism and is used for removing dust from the battery cells before detection.

[0033] Compared with the prior art, the present application replaces the manual inspection of the appearance of the battery cells by setting up a feeding mechanism, a transmission mechanism, a core surface inspection mechanism, a side inspection mechanism, a tab inspection mechanism and a discharging mechanism, thereby avoiding misjudgment of inspections, improving inspection efficiency, and thus improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0035] Figure 1Schematic diagram of the structure of the appearance inspection device in this embodiment;

[0036] Figure 2 This is a schematic diagram of the structure of the core surface detection mechanism in this embodiment;

[0037] Figure 3 Schematic diagram of the structure of the side detection mechanism in this embodiment;

[0038] Figure 4 Schematic diagram of the structure of the tab detection mechanism in this embodiment;

[0039] Figure 5 This is one of the structural schematic diagrams of the angle detection mechanism in this embodiment;

[0040] Figure 6 This is the second structural schematic diagram of the angle detection mechanism in this embodiment.

[0041] Description of reference numerals:

[0042] 1. Feeding mechanism; 11. Feeding belt; 12. Feeding robot; 2. Transmission mechanism; 21. First transmission mechanism; 22. Transfer mechanism; 23. Third transmission mechanism; 3. Discharging mechanism; 31. Discharging belt; 32. Discharging robot; 4. Tab shaping mechanism; 5. Dust removal mechanism; 100. Core surface detection mechanism; 101. First imaging detection member; 102. First imaging light source; 103. Ring light source; 104. First linear adjustment member; 1041. First support frame; 1042. First Guide rail; 1043, first slider; 1044, first hand wheel; 105, first light source adjustment member; 1051, first bearing plate; 1052, first bearing frame; 1052, first adjustment shaft; 200, side detection mechanism; 201, second imaging detection member; 202, second imaging light source; 203, second linear adjustment member; 2031, second support frame; 2032, second guide rail; 2033, second slider; 2034, second hand wheel; 2035, second bearing plate; 204, first A background plate; 2041, a first background plate; 2042, a background support frame; 2043, a background plate driving member; 205, a linear adjustment module; 206, a second light source adjustment member; 2061, a second carrier frame; 2062, a second adjustment shaft; 300, a tab detection mechanism; 301, a third imaging detection member; 302, a third imaging light source; 3021, an outer ring light source; 3022, an inner ring light source; 303, a tab detection mechanism; 3031, an X-axis linear adjustment module; 303 2. Y-axis linear adjustment module; 3033. Z-axis linear adjustment module; 304. second background plate; 3041. second background plate; 400. corner detection mechanism; 401. fourth imaging detection member; 402. fourth imaging light source; 403. corner background plate; 4031. corner background plate; 4032. corner background bracket; 4033. corner background plate driving member; 404. fourth linear adjustment member; 405. rotating platform; 406. fifth imaging detection member; 500. head detection mechanism. DETAILED DESCRIPTION

[0043] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The present application is related to the design of a visual inspection device and an appearance inspection equipment, wherein the visual inspection device can be applied to the appearance inspection equipment. To make it easier to understand, the following embodiments will bring the visual inspection device into the description of the appearance inspection equipment.

[0047] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0048] Reference Figure 1 , Figure 1 It is a schematic diagram of the structure of the appearance inspection device in this embodiment. The appearance inspection device in this embodiment includes a feeding mechanism 1, a transmission mechanism 2, a core surface inspection mechanism 100, a side inspection mechanism 200, a tab inspection mechanism 300 and a discharging mechanism 3. Among them, the feeding mechanism 1 is used for loading the battery cells. The transmission mechanism 2 is used to receive the battery cells from the feeding mechanism 1 and transmit the battery cells. The core surface inspection mechanism 100, the side inspection mechanism 200 and the tab inspection mechanism 300 are respectively located around the transmission mechanism 2, and visual inspections are performed on the battery cells located at the transmission mechanism 2 respectively. The discharging mechanism 3 unloads the battery cells that have been visually inspected.

[0049] By setting up the loading mechanism 1, the transmission mechanism 2, the core surface detection mechanism 100, the side detection mechanism 200, the tab detection mechanism 300 and the discharging mechanism 3, the automatic loading, transmission and discharging of the battery cells are realized, and the front and back sides of the battery cells, the sides of the battery cells and the tabs of the battery cells are automatically inspected during the transmission process, which replaces the traditional manual inspection of the appearance of the battery cells, avoids misjudgment of detection, improves the detection efficiency, and thus improves the production efficiency.

[0050] Re-reference Figure 1 Furthermore, the appearance inspection device in this embodiment further includes a corner inspection mechanism 400. The corner inspection mechanism 400 is located around the transmission mechanism 2 and is used for appearance inspection of the tail and corner of the battery cell.

[0051] Re-reference Figure 1 Furthermore, the appearance inspection device in this embodiment further includes a head inspection mechanism 500. The head inspection mechanism 500 is located around the transmission mechanism 2 and is used for appearance inspection of the battery cell head.

[0052] Re-reference Figure 1 Furthermore, the appearance inspection device in this embodiment further includes a tab shaping mechanism 4. The tab shaping mechanism 4 is located around the transmission mechanism 2. The tab shaping mechanism 4 is used to shape the tabs of the battery cell before inspection to prevent the tab deformation from affecting the accuracy of the tab appearance inspection.

[0053] Re-reference Figure 1 Furthermore, the appearance inspection device in this embodiment further includes a dust removal mechanism 5. The dust removal mechanism 5 is located around the transmission mechanism 2. The dust removal mechanism 5 is used to remove dust from the battery cell before inspection to prevent dust from affecting the accuracy of the appearance inspection of the front and back sides of the battery cell.

[0054] Re-reference Figure 1 Furthermore, the transmission mechanism 2 includes a first transmission mechanism 21, a transfer mechanism 22 and a second transmission mechanism 23. The number of the dust removal mechanism 5, the core surface detection mechanism 100, the side detection mechanism 200 and the tab detection mechanism 300 are two groups.

[0055] The feeding mechanism 1, the tab shaping mechanism 4, the dust removal mechanism 5, the core surface detection mechanism 100, the side detection mechanism 200, the tab detection mechanism 300 and the head detection mechanism 500 are sequentially arranged along the transmission direction of the first transmission mechanism 21. After the battery cell is fed to the first transmission mechanism 21 by the feeding mechanism 1, the battery cell is transmitted by the first transmission mechanism 21 to sequentially pass through the tab shaping mechanism 4, the dust removal mechanism 5, the core surface detection mechanism 100, the side detection mechanism 200, the tab detection mechanism 300 and the head detection mechanism 500, which respectively correspond to the shaping of the battery cell tab, the dust removal of the front of the battery cell, the appearance inspection of the front of the battery cell, the appearance inspection of the left side of the battery cell, the appearance inspection of the front of the battery cell tab and the appearance inspection of the head of the battery cell.

[0056] The transfer mechanism 22 is located between the first transmission mechanism 21 and the second transmission mechanism 23, and is used to flip the battery cell of the first transmission mechanism 21 by 180 degrees and move it to the second transmission mechanism 23. Preferably, the transfer mechanism 22 corresponds to the discharge position of the first transmission mechanism 21 and the feed position of the second transmission mechanism 23, respectively. The transfer mechanism 22 flips the battery cell transmitted to the discharge position by the first transmission mechanism 21 by 180 degrees, and then moves it to the feed position of the second transmission mechanism 23 for placement.

[0057] The dust removal mechanism 5, the core surface detection mechanism 100, the side detection mechanism 200, the angle detection mechanism 400, the tab detection mechanism 300 and the discharging mechanism 3 are sequentially arranged along the transmission direction of the second transmission mechanism 23. The battery cell after flipping 180 degrees is loaded by the transfer mechanism 22 to the feeding position of the second transmission mechanism 23, and the battery cell is transmitted by the second transmission mechanism 21 to pass through the dust removal mechanism 5, the core surface detection mechanism 100, the side detection mechanism 200, the angle detection mechanism 400, the tab detection mechanism 300 and the discharging mechanism 3 in sequence, and the dust removal of the back of the battery cell, the appearance inspection of the back of the battery cell, the appearance inspection of the right side of the battery cell, the appearance inspection of the tail and the angle of the battery cell, and the appearance inspection of the back of the battery cell tab are respectively performed, and the battery cell that has completed the inspection is moved to the discharging position of the second transmission mechanism 23, and then the discharging mechanism 3 unloads the battery cell that has completed the inspection.

[0058] Preferably, the first transmission mechanism 21 and the second transmission mechanism 23 are both turntable devices, and the loading mechanism 1, the transfer mechanism 22 and the discharging mechanism 3 are respectively arranged between the first transmission mechanism 21 and the second transmission mechanism 23, wherein the loading mechanism 1 and the discharging mechanism 3 are respectively located on opposite sides of the transfer mechanism 22. The directions of rotational transmission of the first transmission mechanism 21 and the second transmission mechanism 23 are opposite, and the remaining mechanisms are respectively arranged along the rotational transmission directions of the first transmission mechanism 21 and the second transmission mechanism 23, so that the appearance inspection equipment in this embodiment forms a reasonable layout with the transfer mechanism 22 as the core, and the whole inspection process is smooth and occupies a small area. Preferably, the transfer mechanism 22 can adopt a four-axis robot or a six-axis robot with a CCD positioning system, which can accurately absorb and grasp the battery cell, and then perform flipping and moving actions.

[0059] Re-reference Figure 1Furthermore, the feeding mechanism 1 includes a feeding belt 11 and a feeding robot 12. The feeding robot 12 is arranged on a side close to the feeding position of the first transmission mechanism 21, and the feeding belt 11 is opposite to the feeding robot 12. The battery cells to be tested are placed on the feeding belt 11 in sequence, and the feeding robot 12 positions and absorbs the battery cells to be tested, and transfers them to the feeding position of the first transmission mechanism 21. The feeding robot 12 in this embodiment can adopt a four-axis robot or a six-axis robot, which is integrated with a CCD image positioning system, which can accurately absorb the battery cells to be tested, and position and place them after moving to the feeding position of the first transmission mechanism 21.

[0060] After the battery cell to be tested is loaded, the first transmission mechanism 21 rotates to drive the battery cell to be tested to move to the tab shaping mechanism 4, and the tab shaping mechanism 4 shapes the tab of the battery cell. The tab shaping mechanism 4 in this embodiment can select a battery cell tab shaping device with a cylinder and a scraper structure, and the scraper is driven by the cylinder to shape the tab of the battery cell, so as to ensure that the tab of the battery cell is in a normal shape, so as to facilitate the correctness of the subsequent tab appearance inspection of the battery cell.

[0061] After the shaping of the cell tab is completed, the first transmission mechanism 21 continues to drive the cell to be tested to move to the dust removal mechanism 5, and the front of the cell is dusted by the dust removal mechanism 5. In this embodiment, a dust removal device with a single-axis manipulator and a brush structure can be selected, and the single-axis manipulator drives the brush to roll on the surface of the cell to remove the dust thereon, so as to achieve the purpose of dust removal and avoid the influence of dust on the appearance inspection of the cell.

[0062] Continue to refer to Figure 2 , Figure 2 Schematic diagram of the structure of the core surface detection mechanism in this embodiment. The core surface detection mechanism 100 includes a first imaging detection member 101 and a first imaging light source 102. The first imaging detection member 101 is used for imaging detection of the front or back of the battery cell, and the first imaging light source 102 is used to provide illumination for imaging the front or back of the battery cell, and the illumination brightness of the first imaging light source 102 gradually decreases from the direction away from the battery cell to the direction close to the battery cell.

[0063] Preferably, the cell to be tested is driven by the first transmission mechanism 21 or the second transmission mechanism 22 to move to below the first imaging detection member 101 and the first imaging light source 102. The first imaging detection member 101 is located above the first imaging light source 102, and the cell to be tested is located on the side of the first imaging light source 102 away from the first imaging detection member 101, and the front or back of the cell to be tested is directly opposite to the imaging end of the first imaging detection member 101.

[0064] Preferably, the core surface detection mechanism 100 also includes a first linear adjustment member 104. The output end of the first linear adjustment member 104 is connected to the first imaging detection member 101, which drives the first imaging detection member 101 to move linearly in a direction perpendicular to the battery cell to be tested. The position of the first imaging detection member 101 relative to the battery cell to be tested can be adjusted by the first linear adjustment member 104. Specifically, the first linear adjustment member 104 includes a first support frame 1041, a first screw pair, a first guide rail 1042, a first slider 1043 and a first hand wheel 1044. The first screw pair is arranged in the first support frame 1041; the first guide rail 1042 is arranged outside the first support frame 1041; the first guide rail 1042 is perpendicular to the turntable of the first transmission mechanism 21 or the second transmission mechanism 22; the first slider 1043 is slidably connected to the first guide rail 1042 and is connected to the nut of the first screw pair; the first hand wheel 1044 is connected to the upper end of the screw of the first screw pair. The first imaging detection member 101 is connected to the first slider 1043 through a connecting plate. The first hand wheel 1044 rotates, so that the first screw rod pair drives the first slider 1043 to move linearly on the first guide rail 1042, and then drives the first imaging detection member 101 to move linearly toward the front or back of the battery cell to be tested, so as to adjust the distance between the first imaging detection member 101 and the battery cell to be tested. The first imaging detection member 101 in this embodiment can adopt an industrial camera. Preferably, the first support frame 1041 is provided with a scale indicating the distance along the direction of the slide rail 1042, so as to facilitate the precise adjustment of the first hand wheel 1044.

[0065] Preferably, the core surface detection mechanism 100 also includes a first light source adjustment member 105. The first light source adjustment member 105 includes a first carrier plate 1051, a first carrier frame 1052 and a first adjustment shaft 1053. The first carrier plate 1051 is fixedly connected to the lower part of the first support frame 1041 and is parallel to the turntable of the first transmission mechanism 21 or the second transmission mechanism 22. A through opening is opened in the middle of the first carrier plate 1051 to facilitate the picture taking of the first imaging detection member 101. The first carrier frame 1052 is arranged on the first carrier plate 1051 and is close to the through opening. The first adjustment shaft 1053 is rotatably connected to the first carrier frame 1502. The first imaging light source 102 is arranged on the first adjustment shaft 1053 and faces the battery cell below the through opening. The first imaging light source 102 in this embodiment is a panel light source, which can be an infrared light source. The corresponding first carrier 1052 can be a U-shaped bracket. The first adjustment shaft 105 is rotatably connected to the top of the U-shaped bracket, and the middle of the back of the first imaging light source 102 is fixedly connected to the first adjustment shaft 1053. An adjustment hand wheel (not shown in the figure) is provided on the first adjustment shaft 1053. By rotating the adjustment hand wheel, the angle of the first imaging light source 102 facing the battery cell can be adjusted. Preferably, the first carrier 1052 is provided with a scale indicating the angle at the peripheral position corresponding to the first adjustment shaft 1053, which is convenient for precise adjustment of the adjustment hand wheel.

[0066] Preferably, the first screw rod pair has two screw nuts, one of which is connected to the first slider 1043, and the first carrier plate 1051 is slidably connected to the first guide rail 1042 and connected to the other screw nut of the first screw rod pair. With this arrangement, the distance between the first imaging light source 102 and the battery cell can be adjusted simultaneously by the first hand wheel 1044. Of course, the first screw rod pair and the first hand wheel 1044 are also provided in two, so as to respectively realize the position adjustment of the first imaging detection member 101 and the first imaging light source 102.

[0067] It can be understood that the imaging end of the first imaging detection component 101 is facing the battery cell to be tested, and the light beam emitted by the first imaging light source 102 has an angle with the central axis of the first imaging detection component 101. Because the light beam emitted by the first imaging light source 102 is diffusive, the closer the first imaging light source 102 is to the battery cell, the brighter the light, and the farther away from the battery cell, the weaker the light. This will make the light illumination of the battery cell uneven, resulting in insufficient illumination at the edge of the battery cell, and further, the imaging of the first imaging detection component 101 cannot highlight the actual situation of the battery cell well, resulting in missed detection. To solve the above problems, when the first imaging light source 102 is made into a panel light source, light sources with different power intensities are set. Specifically, the part of the first imaging light source 102 far from the battery cell is set with a strong light strip or light bead, while the part close to the battery cell is set with a weak light strip or light bead, so that the light source intensity of the first imaging light source 102 gradually weakens from the direction away from the battery cell to the direction close to the battery cell, and further, the lighting brightness of the first imaging light source 102 gradually weakens from the direction away from the battery cell to the direction close to the battery cell, thereby ensuring that the brightness of the light received by the battery cell is uniform, and ensuring that the edge is sufficiently illuminated, thereby improving the imaging quality of the first imaging detection component 101.

[0068] Preferably, the number of first imaging light sources 102 can be symmetrically arranged in multiple numbers to further ensure the lighting quality of the first imaging light sources 102. The multiple first imaging light sources 102 are arranged in sequence around the circumferential direction of the opening of the first carrier plate 1051, and the interval between each two adjacent first imaging light sources 102 is the same. In this embodiment, the number of first imaging light sources 102 is four, and the four first imaging light sources 102 are symmetrically distributed in pairs, so that the light received by the tested battery cell is uniform, further ensuring the lighting quality of the first imaging light source 102.

[0069] Preferably, the core surface detection mechanism 100 further includes an annular light source 103. The annular light source 103 is located between the first imaging light source 102 and the battery cell to be tested. Specifically, it is connected to the bottom surface of the first carrier plate 1051, and the annular hollow portion of the annular light source 103 corresponds to the opening of the first carrier plate 105. The provision of the annular light source 103 can further improve the lighting environment during imaging of the first imaging detection member 101, ensure the imaging quality of the first imaging detection member 101, and make the appearance inspection of the front or back of the battery cell more accurate.

[0070] Continue to refer to Figure 3 , Figure 3 Schematic diagram of the structure of the side detection mechanism in this embodiment. The side detection mechanism 200 includes a second imaging detection member 201 and a second imaging light source 202. The second imaging detection member 201 is used for imaging detection of the side of the battery cell, and the second imaging light source 202 is used to provide lighting for imaging the side of the battery cell. The side detection mechanism 200 is used to perform appearance inspection on the left side or the right side of the battery cell.

[0071] Preferably, the side detection mechanism 200 also includes a second linear adjustment member 203 and a first background plate 204. The second linear adjustment member 203 is arranged opposite to the first background plate 204, and there is a gap between the two. The second imaging detection member 201 is arranged on the second linear adjustment member 203, and the second linear adjustment member 203 is used to adjust the position of the second imaging detection member 201 relative to the battery cell to be tested. The imaging end of the second imaging detection member 201 is directly opposite to the first background plate 204. The second imaging light source 202 is arranged on the second linear adjustment member 203 and is located on one side of the second imaging detection member 201. Specifically, the battery cell to be tested is driven by the first transmission mechanism 21 or the second transmission mechanism 22, moves between the second linear adjustment member 203 and the first background plate 204, the imaging end of the second imaging detection member 201 is directly opposite to the left side or right side of the battery cell to be tested, the first background plate 204 is directly opposite to the right side or left side of the battery cell to be tested, and the second imaging light source 202 faces the right side or left side of the battery cell to be tested.

[0072] Preferably, the second linear adjustment member 203 includes a second support frame 2031, a second screw pair, a second guide rail 2032, a second slider 2033, a second hand wheel 2034 and a second bearing plate 2035. The second screw pair is arranged in the second support frame 2031; the second guide rail 2032 is arranged in the second support frame 2031 and is arranged in parallel on the outer side of the second screw pair. Preferably, there are two second guide rails 2032, and the two second guide rails 2032 are arranged in parallel on opposite sides of the second screw pair; the second slider 2033 is slidably connected to the second guide rail 2032 and connected to the nut of the second screw pair; the second hand wheel 2034 is connected to the screw end of the second screw pair; the second bearing plate 2035 is vertically arranged on the second slider 2033; the second imaging detection member 201 and the second imaging light source 202 are both arranged on the second bearing plate 2035. The second hand wheel 2034 rotates, so that the second screw rod pair drives the second slider 2033 to move linearly on the second guide rail 2032, thereby driving the second imaging detection member 201 disposed on the second carrier plate 2035 to move linearly toward the left side or right side of the battery cell to be tested, adjusting the distance between the second imaging detection member 201 and the battery cell to be tested, and also adjusting the distance between the second imaging light source 202 and the battery cell to be tested. In this embodiment, the second imaging detection member 201 can be an industrial camera. The light source of the second imaging light source 202 in this embodiment is a strip light source, and the second imaging light source 202 faces the side of the battery cell to be tested and is parallel to the side of the battery cell to be tested. Preferably, the second support frame 2031 is provided with a scale indicating the distance along the direction of the second guide rail 2032, so as to facilitate the precise adjustment of the second hand wheel 2034.

[0073] Preferably, the number of the second imaging light sources 202 is two groups. The two groups of second imaging light sources 202 are respectively located on the opposite sides of the second imaging detection member 201. In this embodiment, the two groups of second imaging light sources 202 are respectively located on the upper and lower sides of the second imaging detection member 201. The imaging end of the second imaging detection member 201 is directly opposite to the side of the battery cell to be tested, and the two groups of second imaging light sources 202 are respectively facing the battery cell to be tested, and the two groups of second imaging light sources 202 are respectively parallel to the battery cell to be tested. By setting two groups of symmetrical second imaging light sources 202, the side of the battery cell to be tested is illuminated from two directions respectively to improve the imaging quality of the second imaging detection member 201.

[0074] Preferably, the side detection mechanism 200 also includes a linear adjustment module 205. The second imaging detection member 201 and the two groups of second imaging light sources 202 are respectively arranged on the second carrier plate 2035 through a linear adjustment module 205. Through the arrangement of the linear adjustment module 205, the second imaging detection member 201 and the second imaging light source 202 can be adjusted in relative position along a direction perpendicular to the battery cell to be tested. Specifically, each linear adjustment module 205 has a linear adjustment handle 2051, and the second imaging detection member 201 or the second imaging light source 202 is adjusted up and down by rotating the linear adjustment handle 2051.

[0075] Preferably, the side detection mechanism 200 also includes a second light source adjustment member 206. Each group of second imaging light sources 202 is angle-adjusted by a second light source adjustment member 206. The second light source adjustment member 206 includes a second carrier 2061 and a second adjustment shaft 2062. The second carrier 2061 is arranged through the linear adjustment module 205; the second imaging light source 202 is rotatably connected to the second carrier 2061 through the second adjustment shaft 2062; an adjustment hand wheel (not shown in the figure) is provided on the second adjustment shaft 2062, and the angle of the second imaging light source 202 facing the side of the battery cell to be tested can be adjusted by rotating the adjustment hand wheel. Preferably, the second carrier 2061 is provided with a scale value indicating the angle at the peripheral position corresponding to the second adjustment shaft 2062, so as to facilitate the precise adjustment of the adjustment hand wheel.

[0076] Preferably, the first background plate 204 includes a first background plate 2041, a background support frame 2042 and a background plate driving member 2043. The first background plate 2041 is slidably connected to the background support frame 2042, the output end of the background plate driving member 2043 is connected to the first background plate 2041, the background plate driving member 2043 drives the first background plate 2041 to move linearly, and the position adjustment of the first background plate 2041 is convenient for adjusting the relative position of the first background plate 2041 and the battery cell to be tested, so as to better provide a background when the battery cell to be tested is tested. In this embodiment, the background plate driving member 2043 can be a cylinder.

[0077] Continue to refer to Figure 4 , Figure 4 Schematic diagram of the structure of the tab detection mechanism in this embodiment. The tab detection mechanism 300 includes a third imaging detection member 301 and a third imaging light source 302. The third imaging detection member 301 is used for imaging detection of the tab of the battery cell, and the third imaging light source 302 is used to provide lighting for imaging the tab of the battery cell. The tab detection mechanism 300 is used to perform appearance inspection on the front or back side of the tab of the battery cell.

[0078] Preferably, the tab detection mechanism 300 further includes a second background plate 304. When the battery cell to be tested is moved to the tab detection mechanism 300 driven by the first transmission mechanism 21 or the second transmission mechanism 22, the third imaging detection member 301 and the third imaging light source 302 are located above the tab of the battery cell, wherein the third imaging light source 302 is close to the battery cell to be tested, and the second background plate 304 is located below the tab of the battery cell.

[0079] Preferably, the tab detection mechanism 300 also includes a third linear adjustment member 303. The third linear adjustment member 303 is used to adjust the distance between the third imaging detection member 301 and the tab of the battery cell to be tested. In this embodiment, the third linear adjustment member 303 includes an X-axis linear adjustment module 3031, a Y-axis linear adjustment module 3032, and a Z-axis linear adjustment module 3033. Among them, the structure and actuation principle of the X-axis linear adjustment module 3031 and the Y-axis linear adjustment module 3032 are consistent with the second linear adjustment member 203 with the second supporting plate 2035 removed. The Y-axis linear adjustment module 3032 is arranged on the slider of the X-axis linear adjustment module 3031 and is perpendicular to the X-axis linear adjustment module 3031. The Z-axis linear adjustment module 3033 is consistent with the structure and actuation principle of the first linear adjustment member 104, and the Z-axis linear adjustment module 3033 is vertically arranged on the slider of the Y-axis linear adjustment module 3032. The third imaging detection member 301 is connected to the slider of the Z-axis linear adjustment module 3033 through a connecting plate. In this way, the third imaging detection member 301 can be adjusted in three directions through the third linear adjustment member 303. In this embodiment, the third imaging detection member 301 can be an industrial camera.

[0080] Preferably, the third imaging light source 302 and the second background plate 304 are both arranged on the Z-axis linear adjustment module 3033. In this way, the third imaging light source 302 and the second background plate 304 can be adjusted in two directions synchronously through the X-axis linear adjustment module 3031 and the Y-axis linear adjustment module 3032 of the third linear adjustment member 303.

[0081] Preferably, the tab detection mechanism 300 has two linear adjustment modules 205 arranged in the vertical direction, and the third imaging detection component 301 and the third imaging light source 302 can be respectively arranged on the Z-axis linear adjustment module 3033 through a linear adjustment module 205, so as to more accurately adjust the relative distance between the third imaging detection component 301 and the third imaging light source 302 and the battery cell. In addition, the above-mentioned adjustments all have scale values ​​as a reference for precise adjustment. The third imaging light source 302 in this embodiment adopts an annular light source. The third imaging detection component 301 takes a photo of the battery cell tab through the hollow position of the third imaging light source 302, and the annular third imaging light source 302 provides sufficient illumination for the imaging of the third imaging detection component 301 to ensure the imaging quality.

[0082] Preferably, the third imaging light source 302 includes an outer ring light source 3021 and an inner ring light source 3022. The inner ring light source 3022 is located inside the ring of the outer ring light source 3021, and the two provide illumination for the cell tabs and the connection between the cell tabs and the cell, respectively, so as to clearly image the cell tabs and the connection between the cell tabs and the cell, and accurately detect the appearance.

[0083] Preferably, the second background plate 304 includes a second background plate 3041 and a background plate driving member, and the background plate driving member drives the second background plate to move and adjusts the position of the second background plate 3041 to provide a better background for testing the tabs of the battery cell to be tested.

[0084] Continue to refer to Figure 1 , Figure 5 and Figure 6 , Figure 5 FIG. 1 is one of the structural schematic diagrams of the angle detection mechanism in this embodiment. Figure 6 This is the second structural schematic diagram of the corner detection mechanism in this embodiment. The corner detection mechanism 400 includes a fourth imaging detection component 401 and a fourth imaging light source 402. The fourth imaging detection component 401 is used for imaging detection of the tail and corner of the battery cell, and the fourth imaging light source 402 is used to provide lighting for imaging the tail and corner of the battery cell. The corner detection mechanism 400 performs appearance inspection on the tail of the battery cell and the corners on both sides of the tail of the battery cell, especially the inspection of the corner of the tail of the battery cell, so that the appearance inspection of the battery cell can be more comprehensive and accurate.

[0085] Preferably, there are two fourth imaging detection members 401. The two fourth imaging detection members 401 are respectively used to detect two corners of the tail of the battery cell.

[0086] Preferably, the angle detection mechanism 400 also includes two groups of fourth linear adjustment members 404 and two rotating platforms 405. Each fourth imaging detection member 401 is arranged on a fourth linear adjustment member 404 through a rotating platform 405. The structure and actuation principle of each fourth linear adjustment member 404 are consistent with the X-axis linear adjustment module 3031 and the Y-axis linear adjustment module 3032, and the position of the fourth imaging detection member 401 relative to the tail and the angle of the battery cell to be tested can be adjusted by the fourth linear adjustment member 404. The angle of the tail and the angle of the fourth imaging detection member 401 facing the battery cell can be adjusted by the rotating platform 405. In addition, the above-mentioned adjustments all have scale values ​​as references for precise adjustment. The fourth imaging detection member 401 in this embodiment can use an industrial camera.

[0087] Preferably, the fourth imaging light source 402 is located between two fourth imaging detection components 401 and faces the tail of the battery cell under test. Preferably, the fourth imaging light source 402 is arranged on a second linear adjustment component 203 to adjust the position of the fourth imaging light source 402 relative to the tail of the battery cell under test. The light source of the fourth imaging light source 402 in this embodiment is a strip light source. Preferably, the number of the fourth imaging light sources 402 is two, and the two fourth imaging light sources 402 are arranged vertically, and each fourth imaging light source 402 faces the tail of the battery cell, providing sufficient illumination for the tail of the battery cell from different directions to ensure the imaging quality of the fourth imaging detection component 401. Preferably, the angle at which the fourth imaging light source 402 faces the tail of the battery cell is adjustable, and specifically, it can be adjusted by an adjustment device similar to the second light source adjustment component 206.

[0088] Preferably, the folding angle detection mechanism 400 further includes a fifth imaging detection component 406. The fifth imaging detection component 406 is located between two fourth imaging light sources 402 and is used for detecting the side of the tail of the battery cell.

[0089] Preferably, the folding angle detection mechanism 400 further includes a folding angle background plate component 403. The folding angle background plate component 403 is used to provide a background for the fourth imaging detection component 401 during shooting.

[0090] Preferably, the folding angle background plate component 403 includes a folding angle background plate 4031, a folding angle background bracket 4032, and a folding angle background plate driving component 4033. The folding angle background plate 4031 is arranged on the folding angle background bracket 4032, and the output end of the folding angle background plate driving component 4033 is connected to the folding angle background bracket 4032; the folding angle background plate driving component 4033 drives the folding angle background bracket 4032 to move, and further drives the folding angle background plate 4031 to move to perform the position movement of the folding angle background plate 4031. The folding angle background plate 4031 in this embodiment is in the shape of a cover body with an approximately "冂"-shaped longitudinal section, and the side of the folding angle background plate 4031 facing the fourth imaging light source 402 and the two fourth imaging detection components 401 is unobstructed. The folding angle background plate 4031 with such a shape setting can provide an all-round background for the shooting and imaging of the two fourth imaging detection components 401 and the fifth imaging detection component 406 to ensure the imaging quality. In this embodiment, the folding angle background plate driving component 4033 can adopt a cylinder.

[0091] Refer back to Figure 1 Furthermore, the head detection mechanism 500 is used for detecting the head of the battery cell. The structure and operating principle of the head detection mechanism 500 are the same as those of the side detection mechanism 200 to realize the detection of the head and the head folding angle of the battery cell. Preferably, the structure and operating principle of the head detection mechanism 500 are the same as those of the folding angle detection mechanism 400.

[0092] Refer back to Figure 1Furthermore, the discharging mechanism 3 includes a discharging belt 31 and a discharging robot 32. The discharging robot 32 is arranged on one side close to the discharging position of the second transmission mechanism 22, and the discharging belt 31 is opposite to the discharging robot 32. The discharging robot 32 absorbs the battery cells that have been inspected and moves to the feeding position of the discharging belt 31, and then the discharging belt 31 unloads the battery cells. The discharging robot 32 in this embodiment can be a four-axis or six-axis robot with a positioning system.

[0093] Preferably, the discharge pull belt 31 is provided with three layers or three layers, namely good products, preliminary NG and serious NG, and the discharge robot 32 places the tested battery cells on the corresponding discharge pull belts. For example, the battery cells that are all qualified in the appearance inspection are good products, the battery cells that are unqualified in the front appearance inspection and qualified in the rest of the positions are preliminary NG products, and the battery cells that are unqualified in the front and back inspection and the tab inspection are serious NG products. In this way, the battery cell products can be diverted according to the results of the appearance inspection, which is convenient for subsequent processing.

[0094] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A visual inspection device, characterized in that: include: A core surface detection mechanism (100) comprises a first imaging detection component (101) and a first imaging light source (102); the first imaging detection component (101) is used for imaging detection of the front or back of a battery core, the first imaging light source (102) is used for providing illumination when imaging the front or back of the battery core, and the illumination brightness of the first imaging light source (102) gradually decreases from a direction away from the battery core to a direction close to the battery core; the first imaging detection component (101) is located above the first imaging light source (102); the battery core to be tested is located on a side of the first imaging light source (102) away from the first imaging detection component (101), and the front or back of the battery core to be tested is directly opposite to the imaging end of the first imaging detection component (101); A side detection mechanism (200) used for imaging detection of the side of the battery cell; A tab detection mechanism (300) for imaging and detecting the tabs of the battery cell; and A folding angle detection mechanism (400), the folding angle detection mechanism (400) comprising two fourth imaging detection components (401), a fourth imaging light source (402), a folding angle background plate component (403), two sets of fourth linear adjustment components (404) and two rotating platforms (405); the fourth imaging detection component (401) is used for imaging detection of the tail and folding angle of the battery cell, the fourth imaging light source (402) is used for providing lighting when imaging the tail and folding angle of the battery cell; the two fourth imaging detection components (401) are respectively used for detecting the two folding angles of the tail of the battery cell; The angled background plate (403) is arranged to cover the battery cell to be tested; the position of the fourth imaging detection component (401) relative to the tail and the angle of the battery cell to be tested is adjusted by the fourth linear adjustment component (404); the angle of the fourth imaging detection component (401) facing the tail and the angle of the battery cell is adjusted by the rotating platform (405); the angled background plate (403) comprises an angled background plate (4031); the angled background plate (4031) is in the shape of a cover with a U-shaped longitudinal section, and the side thereof facing the fourth imaging light source (402) and the two fourth imaging detection components (401) is unobstructed.

2. The visual inspection device according to claim 1, characterized in that: The core surface detection mechanism (100) further comprises an annular light source (103); the annular light source (103) is located between the first imaging light source (102) and the battery core to be tested.

3. The visual inspection device according to claim 1, characterized in that: The core surface detection mechanism (100) further comprises a first linear adjustment member (104); the output end of the first linear adjustment member (104) is connected to the first imaging detection member (101), and is used to adjust the position of the first imaging detection member (101) relative to the battery cell to be tested.

4. The visual inspection device according to claim 1, characterized in that: The side detection mechanism (200) comprises a second imaging detection component (201) and a second imaging light source (202); the second imaging detection component (201) is used for imaging detection of the side of the battery cell, and the second imaging light source (202) is used for providing illumination when imaging the side of the battery cell.

5. The visual inspection device according to claim 4, characterized in that: The number of the second imaging light sources (202) is two groups; the two groups of the second imaging light sources (202) are respectively located on two opposite sides of the second imaging detection component (201); the imaging end of the second imaging detection component (201) is directly opposite to the side of the battery cell to be tested, and the two groups of the second imaging light sources (202) are respectively facing the side of the battery cell to be tested.

6. The visual inspection device according to claim 4, characterized in that: The side detection mechanism (200) further comprises a second linear adjustment member (203); the second linear adjustment member (203) is used to adjust the position of the second imaging detection member (201) relative to the battery cell to be detected.

7. The visual inspection device according to claim 1, characterized in that: The tab detection mechanism (300) comprises a third imaging detection component (301) and a third imaging light source (302); the third imaging detection component (301) is used for imaging detection of the tab of the battery cell, and the third imaging light source (302) is used for providing illumination when imaging the tab of the battery cell.

8. The visual inspection device according to claim 7, characterized in that: The tab detection mechanism (300) further comprises a third linear adjustment member (303); the third linear adjustment member (303) is used to adjust the position of the third imaging detection member (301) relative to the tab of the battery cell to be detected.

9. The visual inspection device according to claim 1, characterized in that: It also includes a head detection mechanism (500); the head detection mechanism (500) is used for detecting the head of the battery cell.

10. An appearance inspection device, characterized in that: include: A loading mechanism (1), which is used for loading battery cells; A transmission mechanism (2) which receives the battery cells from the feeding mechanism (1) and transmits the battery cells; The visual inspection device according to claim 1, wherein the core surface inspection mechanism (100), the side edge inspection mechanism (200), the tab inspection mechanism (300), and the angle inspection mechanism (400) are respectively located around the transmission mechanism (2), and visual inspection is performed on the battery cells located at the transmission mechanism (2); and A discharging mechanism (3) is used to discharge the battery cells detected by the visual detection device.

11. The appearance inspection device according to claim 10, characterized in that: It also includes a head detection mechanism (500); the head detection mechanism (500) is located around the transmission mechanism (2) and is used for detecting the head of the battery cell.

12. The appearance inspection device according to claim 11, characterized in that: The transmission mechanism (2) comprises a first transmission mechanism (21), a transfer mechanism (22) and a second transmission mechanism (23); The feeding mechanism (1), the core surface detection mechanism (100), the side edge detection mechanism (200), the tab detection mechanism (300) and the head detection mechanism (500) are arranged in sequence along the transmission direction of the first transmission mechanism (21); The transfer mechanism (22) is located between the first transmission mechanism (21) and the second transmission mechanism (23), and is used to flip the battery cell of the first transmission mechanism (21) 180 degrees and move it to the second transmission mechanism (23); The core surface detection mechanism (100), the side edge detection mechanism (200), the angle detection mechanism (400), the tab detection mechanism (300) and the discharge mechanism (3) are arranged in sequence along the transmission direction of the second transmission mechanism (23).

13. The appearance inspection device according to claim 10, characterized in that: It also includes a tab shaping mechanism (4); the tab shaping mechanism (4) is located around the transmission mechanism (2) and is used for shaping the tabs of the battery cell before detection.

14. The appearance inspection device according to claim 10, characterized in that: It also includes a dust removal mechanism (5); the dust removal mechanism (5) is located around the transmission mechanism (2) and is used to remove dust from the battery cell before detection.

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