Photovoltaic battery piece arranging system

Abstract

The utility model provides a photovoltaic battery piece arrangement system, relates to the field of photovoltaic technology, and aims to solve the technical problem of low reliability of defect detection of photovoltaic battery pieces in the arrangement system. The photovoltaic battery piece arranging system comprises an image acquisition device, a piece taking device and a control device in communication connection with the image acquisition device, and the piece taking device comprises a base, a telescopic structure and a grabbing structure, when the sheet taking device grabs the photovoltaic cell sheet, the telescopic structure is used for driving the photovoltaic cell sheet to switch between a plane state and a curved surface state; the image acquisition device is used for acquiring an image of the photovoltaic cell; and the control device is used for determining whether the photovoltaic cell is a normal cell or a defective cell based on the image of the photovoltaic cell. According to the photovoltaic cell sorting system, defective cells can be automatically screened, and the reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic, in particular to a whole-piece system for photovoltaic cells. Background Art

[0002] The statements in this part only provide background art related to the utility model and do not necessarily constitute prior art.

[0003] The automated manufacturing of photovoltaic cells has replaced more than 95% of manual labor, but there are still some tasks that require manual operation. For example, during the whole-piece process of finished photovoltaic cells, it is still necessary for workers to detect the defects of photovoltaic cells, and the reliability is difficult to guarantee. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a whole-piece system and a whole-piece method for photovoltaic cells, so as to solve the technical problem of low reliability in defect detection of photovoltaic cells in the whole-piece system.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a whole-piece system for photovoltaic cells, including a control device, an image acquisition device and a sheet-taking device communicatively connected to the control device. The sheet-taking device includes a base, a telescopic structure and a grasping structure respectively arranged on the base;

[0007] When the sheet-taking device grasps the photovoltaic cell, the telescopic structure is used to drive the photovoltaic cell to convert between a planar state and a curved state;

[0008] The image acquisition device is used to acquire an image of the photovoltaic cell;

[0009] The control device is used to determine whether the photovoltaic cell is a normal cell or a defective cell based on the image of the photovoltaic cell.

[0010] According to at least one embodiment of the utility model, the grasping structure is arranged at the middle position of the base, and the telescopic structure is arranged at a position of the base close to the edge.

[0011] According to at least one embodiment of the utility model, the number of the telescopic structures is multiple, and at least two of the multiple telescopic structures are respectively located on opposite sides of the grasping structure.

[0012] According to at least one embodiment of the utility model, the telescopic structure includes a fixed part fixedly arranged on the base and a telescopic part connected to the fixed part, and the telescopic part is used to move at least a part of the photovoltaic cell opposite to the telescopic part away from the base.

[0013] According to at least one embodiment of the present utility model, the telescopic structure further includes a grasping portion for grasping the photovoltaic cell, and the grasping portion is provided at an end of the telescopic portion away from the fixed portion, and the telescopic portion is configured to move at least a portion of the photovoltaic cell opposite to the telescopic portion away from and / or close to the base.

[0014] According to at least one embodiment of the present utility model, the base is a frame structure, and the frame structure includes a first frame and a second frame connected to the first frame;

[0015] The telescopic structure and the grasping structure are provided on a side of the first frame away from the second frame;

[0016] The image acquisition device is provided on the second frame and located on a side of the second frame facing the first frame, and the image acquisition device is opposite to the grasping structure.

[0017] According to at least one embodiment of the present utility model, the whole-sheet system further includes a whole-sheet device, and the whole-sheet device includes a plurality of whole-sheet portions and a linear motion mechanism for driving the whole-sheet portions, and each whole-sheet portion is configured to align corresponding sides of the stacked photovoltaic cells.

[0018] According to at least one embodiment of the present utility model, the whole-sheet device further includes a blowing mechanism, and the blowing mechanism has a plurality of blowing ports facing the side of the stacked photovoltaic cells, and the plurality of blowing ports are arranged along a first direction;

[0019] The first direction refers to the height direction of the stacked photovoltaic cells.

[0020] According to at least one embodiment of the present utility model, the blowing port is a long-strip-shaped hole, and the blowing port extends along a second direction, and the second direction is perpendicular to the first direction; or,

[0021] A plurality of blowing holes form the blowing port, and in the same blowing port, the plurality of blowing holes are arranged along the second direction.

[0022] According to at least one embodiment of the present utility model, the whole-sheet system further includes a transverse transfer module that moves between each work station, and the sheet-taking device is provided on the transverse transfer module.

[0023] In a second aspect, the present utility model further provides a method for whole-sheeting photovoltaic cells, which is applied to the whole-sheet system in the first aspect, and the method for whole-sheeting photovoltaic cells includes:

[0024] The control device controls the grasping structure to grasp the photovoltaic cell;

[0025] The control device controls the telescopic structure to drive the photovoltaic cell to switch between a planar state and a curved state;

[0026] The control device controls the image acquisition device to acquire an image of the photovoltaic cell;

[0027] Based on the image of the photovoltaic cell, the control device determines whether the photovoltaic cell is a normal cell or a defective cell.

[0028] According to at least one embodiment of the present invention, the grasping structure includes a vacuum chuck, and the method for integrating the photovoltaic cells specifically includes:

[0029] The control device controls the vacuum chuck to adsorb the photovoltaic cell;

[0030] The control device controls the telescopic structure to extend, so that the photovoltaic cell deforms.

[0031] According to at least one embodiment of the present invention, the integrating system further includes an integrating device, and the integrating device includes a plurality of integrating parts and a linear motion mechanism for driving the integrating parts; the control device is communicatively connected to the linear motion mechanism;

[0032] When the control device determines that the photovoltaic cell is a normal cell, the method for integrating the photovoltaic cells further includes:

[0033] The control device controls the sheet taking device to move to the integrating device and stack the normal cells inside the integrating device;

[0034] The control device controls each of the integrating parts to approach and align with the corresponding sides of the stacked normal cells through the linear motion mechanism.

[0035] According to at least one embodiment of the present invention, the integrating system further includes a recycling bin. When the control device determines that the photovoltaic cell is a defective cell, the method for integrating the photovoltaic cells further includes:

[0036] The control device controls the sheet taking device to move to the recycling bin and put the defective cell into the recycling bin.

[0037] According to at least one embodiment of the present invention, the integrating device further includes a blowing mechanism, and the blowing mechanism is communicatively connected to the control device. In the step where the control device controls each of the integrating parts to approach and align with the corresponding sides of the stacked normal cells through the linear motion mechanism, it further includes:

[0038] The control device controls the blowing mechanism to blow air towards the sides of the stacked normal cells.

[0039] Among one or more technical solutions provided in the exemplary embodiments of the present utility model, at least one of the following beneficial effects can be achieved.

[0040] The whole-piece photovoltaic cell system of the exemplary embodiment of the present utility model includes an image acquisition device, a wafer picking device, and a control device. After the photovoltaic cell is grabbed by the grabbing structure of the wafer picking device, the telescopic mechanism drives the grabbed photovoltaic cell to switch between a planar state and a curved state. The stress generated by the deformation of the photovoltaic cell will magnify the hidden crack of the defective photovoltaic cell. The image acquisition device will collect the image in which the hidden crack of the photovoltaic cell is magnified, and the control device will compare this image with the reference image of the photovoltaic cell to determine whether the photovoltaic cell has defects. The magnified hidden crack defects can be easily acquired and detected by the image acquisition device, thereby making the defect judgment of the control device more reliable.

[0041] Furthermore, since the whole-piece photovoltaic cell system can automatically screen defective cells, it can replace manual screening and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings illustrate exemplary embodiments of the present utility model and are used together with the description to explain the principles of the present utility model. These drawings are included to provide a further understanding of the present utility model, and the drawings are included in this specification and form a part of this specification;

[0043] Figure 1 is a front view structural schematic diagram of the whole-piece system according to an embodiment of the present utility model;

[0044] Figure 2 is a top view structural schematic diagram of the whole-piece system according to an embodiment of the present utility model;

[0045] Figure 3 is an axonometric structural schematic diagram of the wafer picking device according to an embodiment of the present utility model;

[0046] Figure 4 is an axonometric structural schematic diagram of the wafer picking device according to another embodiment of the present utility model;

[0047] Figure 5 is a structural schematic diagram of each telescopic state of the telescopic structure according to an embodiment of the present utility model;

[0048] Figure 6A is a top view structural schematic diagram of the whole-piece device (initial state) according to an embodiment of the present utility model;

[0049] Figure 6BIt is a schematic top view structure diagram of the whole-piece device (in the whole-piece state) according to an embodiment of the present invention;

[0050] Figure 7 It is an isometric structure diagram of the air-blowing mechanism according to an embodiment of the present invention;

[0051] Figure 8 It is a three-dimensional exploded structure diagram of the air-blowing mechanism according to an embodiment of the present invention;

[0052] Figure 9 It is a schematic flowchart of the method for the whole piece of photovoltaic cell.

[0053] Reference numerals: 10, sheet-taking device; 11, first frame; 12, second frame; 13, grasping structure; 14, telescopic structure; 141, fixing part; 142, telescopic part; 143, grasping part; 20, detection table; 21, image acquisition device; 30, recycling bin; 40, whole-piece device; 41, whole-piece part; 50, material box; 60, photovoltaic cell; 71, first plate; 711, air-blowing hole; 72, second plate; 721, air-blowing port. Detailed implementation manners

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] A photovoltaic cell is a device that converts solar energy into electrical energy. With the iterative update of automation technology, more than 95% of the manual work in the photovoltaic cell manufacturing workshop has been replaced by large-scale application of automation. However, there is still 5% of the work for which there is no mature automation technology to replace it, and the whole-piece process of the finished photovoltaic cell is one of them.

[0056] In the whole-piece process of photovoltaic cells, it is necessary to screen and remove the defective photovoltaic cells so as to stack and package the qualified photovoltaic cells for factory shipment. In the related art, in this screening process, manual screening is required, and the reliability of defect identification is insufficient and the production efficiency is difficult to guarantee.

[0057] In view of the above problems, the whole-piece photovoltaic cell system provided by the exemplary embodiment of the present utility model includes a control device, an image acquisition device and a sheet-taking device communicatively connected to the control device. The sheet-taking device includes a base and a telescopic structure and a grasping structure provided on the base; when the sheet-taking device grasps the photovoltaic cell, the telescopic structure is used to drive the photovoltaic cell to convert between a planar state and a curved state; the image acquisition device is used to acquire an image of the photovoltaic cell; the control device is used to determine whether the photovoltaic cell is a normal cell or a defective cell based on the image of the photovoltaic cell.

[0058] After the photovoltaic cell is grasped by the grasping structure provided on the base, the telescopic structure provided on the base applies a force to the photovoltaic cell through telescoping, deforming the photovoltaic cell in the planar state, thereby magnifying the defects on the photovoltaic cell, so that the image acquisition device can obtain clear defect pictures, so that the control device can accurately detect the defect and improve the reliability of recognition.

[0059] Figure 1 is a front view structural schematic diagram of the whole-piece system according to an embodiment of the present utility model; Figure 2 is a top view structural schematic diagram of the whole-piece system according to an embodiment of the present utility model. As Figure 1 and Figure 2 shown, in the whole-piece system provided by the exemplary embodiment of the present utility model, there are successively arranged a cassette 50 station for storing photovoltaic cells, a detection table 20 station, a recycling bucket 30 station and a whole-piece device 40 station, and the sheet-taking device 10 can move between the above four stations. For example, the sheet-taking device 10 grasps a photovoltaic cell 60 in the cassette 50, moves above the detection table 20, and acquires an image of the photovoltaic cell 60 through the image acquisition device 21 arranged in the detection table 20. The image acquisition device 21 transmits the image to the control device (not shown in the figure), and the control device compares the image with the reference image of the photovoltaic cell 60 to determine whether there are defects on the photovoltaic cell 60. When it is determined that the photovoltaic cell 60 has defects, the control device controls the sheet-taking device 10 to move above the recycling bucket 30 and release the photovoltaic cell 60 into the recycling bucket 30 for further processing; when the control device determines that the photovoltaic cell 60 is a normal cell, the control device controls the sheet-taking device 10 to move above the whole-piece device 40 and place it in the cavity of the whole-piece device for stacking and whole-piece of the photovoltaic cell 60.

[0060] Figure 3 is an axonometric structural schematic diagram of the sheet-taking device according to an embodiment of the present utility model. As Figure 3As shown, in the whole-piece system provided by the exemplary embodiment of the present utility model, the sheet-taking device 10 includes a base, and a telescopic structure 14 and a grasping structure 13 respectively arranged on the base; when the sheet-taking device 10 grasps the photovoltaic cell 60, the telescopic structure 14 is used to drive the photovoltaic cell 60 to convert between a planar state and a curved state.

[0061] In practical applications, the grasping structure 13 arranged on the base can grasp one photovoltaic cell 60. For example, the grasping structure 13 can be a vacuum chuck. When the vacuum chuck adsorbs the photovoltaic cell 60, the telescopic structure 14 arranged on the base can extend, thereby driving the grasped photovoltaic cell 60 to deform, converting from a planar state to a curved state. When the telescopic structure 14 retracts, the photovoltaic cell 60 loses the deforming force and returns from the curved state to the planar state. During this conversion process, if there are defects in the photovoltaic cell 60, such as hidden cracks, the hidden cracks will be amplified due to the stress generated by the deformation. The hidden cracks before amplification are difficult to be visually detected, while the amplified hidden cracks can be more easily detected after the image acquisition device 21 acquires the image of the photovoltaic cell 60, and are determined as defective products by the control device for further processing, such as being moved into the recycling bucket 30; when the photovoltaic cell 60 is determined as a non-defective cell, the deformation of the photovoltaic cell 60 caused by the expansion and contraction of the telescopic structure 14 is within the recoverable range and will not have a destructive impact on the photovoltaic cell 60, and is then determined as a normal sheet by the control device for further processing. For example, the photovoltaic cell 60 is moved into the whole-piece device 40 for stacking and whole-piece processing for subsequent packaging and leaving the factory.

[0062] In some embodiments, as Figure 3 shown, the grasping structure 13 is arranged at the middle position of the base, and the telescopic structure 14 is arranged at a position close to the edge of the base. The grasping structure 13 can grasp the middle position of the photovoltaic cell 60. For example, when the contour shape of the photovoltaic cell 60 is rectangular, the grasping structure 13 grasps the center point of the rectangular surface of the photovoltaic cell 60. When the telescopic structure 14 at a position close to the edge of the base applies force to the position close to the edge of the photovoltaic cell 60, compared with applying force to a position closer to the middle, it will cause a relatively larger bending deformation of the photovoltaic cell 60, that is, a relatively larger amplification effect on the hidden cracks, increasing the probability of detecting the hidden cracks.

[0063] In some embodiments, the number of the telescopic structures 14 is plural, and at least two of the plural telescopic structures 14 are respectively located on opposite sides of the grasping structure 13. Since the grasping structure 13 grasps the middle position of the photovoltaic cell 60, compared with a single telescopic structure 14, the plural telescopic structures 14 have more force application points on the photovoltaic cell 60 and are not likely to cause damage to the photovoltaic cell 60. On the other hand, the plural telescopic structures 14 make the deformation of each position of the photovoltaic cell 60 more uniform, so that the hidden cracks at each position can be amplified to facilitate discovery. Exemplarily, at least two telescopic structures 14 are located on opposite sides of the grasping structure 13, which also causes the parts of the photovoltaic cell 60 located on the opposite sides to deform respectively, so that the whole photovoltaic cell 60 presents a concave-convex shape.

[0064] For example, as Figure 3 shown, the base can be the first frame 11, and the first frame 11 is composed of straight rods in a cross shape. The grasping structure 13 is located at the cross point, and the four telescopic structures 14 are respectively located at the end positions of the two straight rods. Among them, the extending direction of one straight rod is parallel to the length direction of the rectangular photovoltaic cell 60, and the extending direction of the other straight rod is parallel to the width direction of the rectangular photovoltaic cell 60. When the four telescopic structures 14 all extend, the four sides of the photovoltaic cell 60 grasped by the grasping structure 13 all deform in a direction away from the first frame 11, forming a deformation with the middle bulging upward, and further enabling the hidden cracks at each position of the photovoltaic cell 60 to be affected by the deformation and amplified.

[0065] In an alternative embodiment, as Figure 3 shown, the telescopic structure 14 includes a fixed part 141 fixedly arranged on the base and a telescopic part 142 connected to the fixed part 141. The telescopic part 142 is used to move at least the part of the photovoltaic cell 60 opposite to the telescopic part 142 away from the base.

[0066] Exemplarily, the above-mentioned telescopic structure 14 can be one of a cylinder, a hydraulic cylinder, and an electric cylinder. Hereinafter, the cylinder is taken as an example for introduction. The cylinder body of the cylinder forms the fixed part 141 arranged on the base, and the telescopic rod of the cylinder forms the telescopic part 142. When the telescopic rod extends from the cylinder body, the end of the telescopic rod abuts against the top surface of the photovoltaic cell 60 and pushes the corresponding part of the photovoltaic cell 60 to deform downward, and the photovoltaic cell 60 forms a curved state with the middle bulging; when the telescopic rod retracts into the cylinder body, the deformed part of the photovoltaic cell 60 recovers until the photovoltaic cell 60 forms a flat state. The telescopic rod can move reciprocally, thereby realizing the repeated switching of the photovoltaic cell 60 between the curved state with the middle bulging upward and the flat state, so as to amplify the hidden cracks on the photovoltaic cell 60 and facilitate the image acquisition device 21 to collect the defects.

[0067] In some embodiments, Figure 3 As shown, on the basis of the telescopic structure 14 , it further includes a gripping portion 143 for gripping the photovoltaic cell 60 . The gripping portion 143 is disposed at the end of the telescopic portion 142 away from the fixing portion 141 .

[0068] For example, a vacuum suction cup is also provided on the free end of the telescopic rod of the cylinder, and the vacuum suction cup forms the above-mentioned grasping portion 143. When the sheet picking device 10 grasps the photovoltaic cell 60 in the material box 50, the grasping structure 13 and the grasping portion 143 of the telescopic structure 14 grasp the photovoltaic cell 60 at the same time, which can maintain the stability and grasping reliability of the photovoltaic cell 60.

[0069] Figure 5 Schematic diagram of the telescopic structure in each telescopic state according to the embodiment of the utility model. Figure 5 As shown, Figure 5 The state a in the figure is the normal state of the telescopic structure 14, at which the photovoltaic cell 60 is in a flat state; when the control device controls the telescopic portion 142 to retract, the grasping portion 143 grasps the portion of the photovoltaic cell 60 near the edge, so the edge of the photovoltaic cell 60 is driven to deform upward to approach the base, forming a Figure 5 In the middle b state, the photovoltaic cell 60 forms a "concave" curved surface state; when the control device controls the telescopic portion 142 to extend, the edge of the photovoltaic cell 60 is driven downward to deform away from the base, forming a Figure 5 In the middle c state, the photovoltaic cell 60 forms a "convex" curved surface state; in this way, the photovoltaic cell 60 repeatedly switches between the "concave" and "convex" curved surface states, thereby amplifying the hidden crack abnormality of the finished product of the defective photovoltaic cell 60 through the stress generated by the deformation.

[0070] Exemplarily, the whole-piece system includes a lifting module with up-and-down movement, so that the base descends to grab the photovoltaic cell 60 from the station with more than 50 boxes and then moves up to take it out. For example, a cylinder is arranged on the gantry, and the base is arranged at the end of the telescopic rod of the cylinder. In order to move the grabbed photovoltaic cell 60 to the next station, the whole-piece system also includes a transverse movement module with horizontal movement. The lifting module is arranged on the transverse movement module. The transverse movement module can include two transverse slide rails arranged on the gantry. The extension direction of the slide rails is the arrangement direction of each station. The slider is slidably arranged on the slide rail. The slider is connected to the motor through a synchronous belt, so that the lifting module arranged on the slider moves between each station.

[0071] For example, after the film picking device 10 grabs the photovoltaic cell 60 from the material box 50 station, the lateral movement module drives the film picking device 10 to move above the inspection station 20 station, and an image acquisition device 21 is arranged in the inspection station 20. The image acquisition device 21 can be a visual camera or a video camera, etc. When the control device realizes the switching of the concave and convex surface state of the photovoltaic cell 60 through the telescopic structure 14, the visual camera located below takes a picture of the photovoltaic cell 60 and transmits the collected image to the control device for the determination of defective products.

[0072] For example, when the film picking device 10 moves horizontally from the material box 50 station to the inspection table 20 station, the control device can control the photovoltaic cell 60 to repeatedly switch between the "concave" and "convex" curved surface states through the telescopic part 142, and perform inspection at the inspection table 20 station, thereby improving the operating efficiency of the entire system.

[0073] Exemplarily, on the inspection platform 20, a transparent shield is further provided between the visual camera and the photovoltaic cell sheet 60, and the transparent shield can be used to protect the camera lens from being blocked by debris, dust, and the like.

[0074] Figure 4 FIG. 2 is a schematic diagram of the isometric structure of a film taking device according to another embodiment of the present invention. Figure 4 As shown, in the film-taking device provided by the exemplary embodiment of the utility model, the base is formed by a frame structure, wherein the frame structure includes a first frame 11 and a second frame 12 connected to the first frame 11; the telescopic structure 14 and the grasping structure 13 are arranged on the side of the first frame 11 away from the second frame 12; the image acquisition device 21 is arranged on the second frame 12 and is located on the side of the second frame 12 facing the first frame 11, and the image acquisition device 21 is opposite to the grasping structure 13.

[0075] In actual applications, the second frame 12 and the first frame 11 are both formed by two cross-shaped straight rods, the second frame 12 is located above the first frame 11, and the ends of the two straight rods of the second frame 12 are connected to the ends of the corresponding straight rods of the first frame 11 through a vertically arranged connecting rod. The image acquisition device 21 is arranged at the cross intersection of the two straight rods of the second frame 12 and faces the cross intersection of the two straight rods of the first frame 11. Due to the frame structure, the first frame 11 located below does not form a substantial obstruction and does not have a substantial impact on the image acquisition of the photovoltaic cell 60. In order to make the field of view of the image acquisition device 21 larger, a fisheye camera is used for image acquisition.

[0076] Based on this, an image acquisition device 21 is integrated on the sheet taking device 10. The image acquisition device 21 is communicatively connected to the control device, enabling the sheet taking device 10 to simultaneously have the functions of crack magnification and defect detection. Therefore, the station of the detection table 20 can be cancelled, thereby shortening the length of the entire sheet system (the extending direction of the slide rail of the transverse movement module), and further improving the operating efficiency of the entire sheet system.

[0077] Figure 6A is a top view structural schematic diagram of the sheet device (initial state) according to an embodiment of the present invention; Figure 6B is a top view structural schematic diagram of the sheet device (sheet state) according to an embodiment of the present invention. As Figure 1 , Figure 2 and Figure 6A - Figure 6B shown, when the control device determines that the photovoltaic cell 60 is a normal sheet, the control device controls the sheet taking device 10 to move above the station of the sheet device 40 through the transverse movement module and place it in the cavity of the sheet device to stack and sheet the photovoltaic cell 60.

[0078] Exemplarily, the sheet system further includes a sheet device 40. The sheet device 40 includes a plurality of sheet parts 41 and a linear motion mechanism for driving the sheet parts 41. Each sheet part 41 is used to align the corresponding side surfaces of the stacked photovoltaic cells 60. The sheet part 41 is a plate-like structure, and its height is suitable for the stacking height of a preset number of stacked photovoltaic cells 60; it is located at the middle position on the side of the sheet device 40 and is suitable for pushing the middle part of the side surface of the stacked photovoltaic cells 60. When the sheet part 41 is in the state as Figure 6A , it is the initial state. At this time, the sheet taking device 10 can place the photovoltaic cell 60 from the previous station into the cavity of the sheet device 40. After being placed, each sheet part 41 moves towards the stacked photovoltaic cells 60 under the drive of the linear motion mechanism until the side surface of the stacked photovoltaic cells 60 is completely aligned. When the sheet parts 41 located on the four side surfaces of the stacked photovoltaic cells 60 all reach the preset positions, such as the state as Figure 6B , at this time, the distance between two opposite sheet parts 41 is the length of the photovoltaic cell 60; the distance between the other two opposite sheet parts 41 is the width of the photovoltaic cell 60. Thus, the four sheet parts 41 completely align the four side surfaces of the stacked photovoltaic cells 60, and then complete the sheeting, with the periphery remaining flat, so that the stacked photovoltaic cells 60 can be packed and shipped out of the factory.

[0079] Exemplarily, the above linear motion mechanism can be one of a cylinder, a hydraulic cylinder or an electric cylinder. The sheet part 41 is arranged at the end of the telescopic rod, and the moving direction of the telescopic rod is towards or away from the corresponding side surface of the stacked photovoltaic cells 60.

[0080] Figure 7Is an isometric structural schematic diagram of a blowing mechanism according to an embodiment of the present utility model; Figure 8 Is a three-dimensional exploded structural schematic diagram of a blowing mechanism according to an embodiment of the present utility model. As Figure 7 And Figure 8 Shown, in the whole-piece system provided by the exemplary embodiment of the present utility model, the whole-piece device further includes a blowing mechanism. The blowing mechanism has a plurality of blowing ports 721 on the side facing the stacked photovoltaic cells 60, and the plurality of blowing ports 721 are arranged along a first direction; the first direction refers to the height direction of the stacked photovoltaic cells 60.

[0081] Since the surface of the photovoltaic cell 60 is a relatively smooth plane, when a plurality of photovoltaic cells 60 are stacked, the friction between the photovoltaic cells 60 is relatively large. When the whole-piece part 41 performs whole-piece on them, it may be very difficult or impossible to align the corresponding sides of each photovoltaic cell 60. To prevent the occurrence of the above situation. The blowing mechanism of the whole-piece device in the exemplary embodiment of the present utility model can be provided with a plurality of blowing ports 721 arranged along the first direction, that is, the plurality of layer gaps of the gradually stacked photovoltaic cells 60 can be blown by the corresponding blowing ports 721, so that the mutually stacked photovoltaic cells 60 float, reducing the friction between two layers of photovoltaic cells 60 to be suitable for whole-piece. It should be understood that when the lower part of the stacked photovoltaic cells 60 has been whole-pieced, the corresponding blowing ports 721 can be controlled not to generate air flow, and the upper part of the stacked photovoltaic cells 60 can be blown to blow and whole-piece the unaligned layers of photovoltaic cells 60.

[0082] Exemplarily, the above-mentioned whole-piece part 41 is located at the middle position of the corresponding side of the whole-piece device, and the blowing mechanism can be arranged at the positions on both sides of the whole-piece part 41, that is, the blowing mechanism is located at the corner positions of the whole-piece device, and each side of the whole-piece device has two blowing mechanisms.

[0083] Exemplarily, as Figure 8 Shown, the blowing mechanism can be a separate second plate 72. Among them, on the surface of the second plate 72 facing the stacked photovoltaic cells 60, blowing ports 721 are formed. The blowing ports 721 are long strip-shaped holes or slits, and the blowing ports 721 extend along a second direction. The second direction is perpendicular to the first direction, that is, the blowing ports 721 extend along the layers of the stacked photovoltaic cells 60, so as to make the floating effect of the photovoltaic cells 60 better.

[0084] In some other embodiments, as Figure 7 And Figure 8As shown in the figure, the air blowing mechanism can be composed of a first plate 71 and a second plate 72 that are attached to each other. Among them, a plurality of through holes are formed in the portion of the second plate 72 facing away from the first plate 71. Slits communicating with the corresponding through holes are formed on the surface of the second plate 72 facing the first plate 71. A plurality of air blowing holes 711 penetrating the first plate 71 are provided at positions corresponding to the slits on the first plate 71. The plurality of air blowing holes 711 corresponding to the same slit are arranged along the second direction. After the compressed gas is evenly distributed through the air blowing port 721 from the through holes of the second plate 72, it is blown out from each air blowing hole 711 of the first plate 71 into the layer gap of the stacked photovoltaic cells 60, so that the gas is evenly distributed along the layer gap. Compared with the concentration of blowing the photovoltaic cells 60 by a single nozzle, the range covering the layer gap is larger, the blowing effect is better, and it is more conducive to reducing the friction force between the layers of the photovoltaic cells 60. Further, by corresponding one through hole of the second plate 72 to communicate with a plurality of air blowing holes 711 of the first plate 71, while making the gas evenly distributed, one compressed air pipe can be connected to one through hole, and at the same time, a plurality of air blowing holes 711 corresponding to the through hole are controlled, and the operation is more convenient and fast.

[0085] Figure 9 It is a schematic flow chart of the method for whole-piece photovoltaic cells according to an embodiment of the present invention. As Figure 9 shown, the exemplary embodiment of the present invention also provides a method for whole-piece photovoltaic cells, which is applied to the whole-piece system of the above embodiment. The method for whole-piece photovoltaic cells includes the following steps.

[0086] Step 901: The control device controls the grasping structure 13 to grasp the photovoltaic cell 60.

[0087] After the magazine 50 storing the photovoltaic cells 60 is conveyed to the lower part of the picking device 10 by the conveyor belt and stops, the base descends. The grasping structure 13 of the picking device 10 and the grasping part 143 of the telescopic structure 14 simultaneously suck a photovoltaic cell 60 through the suction cup. Then the lifting module raises the base to complete the grasping action.

[0088] Step 902: The control device controls the telescopic structure 14 to drive the photovoltaic cell 60 to switch between a planar state and a curved state.

[0089] The picking device 10 moves the grasped photovoltaic cell 60 to the upper part of the detection table 20 through the transverse movement module. Through the telescopic action of the telescopic part 142 of the telescopic structure 14, the photovoltaic cell 60 is driven to form a "concave" and "convex" curved state to magnify the hidden cracks in the defective photovoltaic cell 60 so that they are easy to be found.

[0090] Step 903: The control device controls the image acquisition device 21 to acquire an image of the photovoltaic cell 60.

[0091] The image acquisition device 21 acquires an image of the photovoltaic cell 60 and transmits the image to the control device.

[0092] Step 904: Based on the image of the photovoltaic cell 60, the control device determines whether the photovoltaic cell 60 is a normal cell or a defective cell.

[0093] The control device compares the acquired image of the photovoltaic cell 60 with a reference image to determine whether the photovoltaic cell 60 is a defective cell.

[0094] When the control device determines that the photovoltaic cell 60 is a defective cell, the control device controls the transverse movement module to move the sheet picking device 10 above the recycling bin 30. The sheet picking device 10 stops sucking the photovoltaic cell 60, and under the action of gravity, the defective cell is collected into the recycling bin 30.

[0095] When the control device determines that the photovoltaic cell 60 is a normal cell, the control device controls the transverse movement module to move the sheet picking device 10 above the sheet forming device 40, stacks the normal cell on top of the photovoltaic cell 60, the air blowing mechanism blows air to the side of the stacked photovoltaic cells 60, and the sheet forming part 41 moves towards the stacked photovoltaic cells 60 for the sheet forming step.

[0096] Repeat the above steps 901 to 904 until all the photovoltaic cells 60 in the magazine 50 are taken out.

[0097] The gripping structure in the sheet forming system provided by the embodiment of the present application includes a vacuum chuck. The method for forming a whole sheet of photovoltaic cells specifically includes:

[0098] The control device controls the vacuum chuck to adsorb the photovoltaic cell;

[0099] The control device controls the telescopic structure to extend, so that the photovoltaic cell undergoes a curved surface deformation;

[0100] The control device controls the telescopic structure to retract, so that the photovoltaic cell returns to a flat state.

[0101] The sheet forming system provided by the embodiment of the present application further includes a sheet forming device. The sheet forming device includes a plurality of sheet forming parts and a linear motion mechanism for driving the sheet forming parts; the control device is communicatively connected to the linear motion mechanism;

[0102] When the control device determines that the photovoltaic cell is a normal cell, the method for forming a whole sheet of photovoltaic cells further includes:

[0103] The control device controls the sheet picking device to move to the sheet forming device and stack the normal cells inside the sheet forming device;

[0104] The control device controls each sheet forming part to approach and align with the corresponding sides of the stacked normal cells through the linear motion mechanism.

[0105] The whole-piece system provided by the embodiments of the present application further includes a recycling bin. When the control device determines that a photovoltaic cell is a defective piece, the method for the whole piece of photovoltaic cells further includes:

[0106] The control device controls the piece-taking device to move to the recycling bin and put the defective piece into the recycling bin.

[0107] In some embodiments, the whole-piece device further includes a blowing mechanism. The blowing mechanism is communicatively connected to the control device. In the step where the control device controls each whole-piece part to approach and align with the corresponding side of the stacked normal pieces through the linear motion mechanism, it further includes:

[0108] The control device controls the blowing mechanism to blow air towards the side of the stacked normal pieces.

[0109] The technical advantages of the above method for the whole piece of photovoltaic cells over the prior art are the same as those of the above whole-piece system for photovoltaic cells and will not be elaborated here.

[0110] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A photovoltaic cell whole-piece system, characterized in that: It includes a control device, and an image acquisition device and a film taking device which are communicatively connected with the control device, and the film taking device includes a base and a telescopic structure and a grasping structure arranged on the base; When the sheet-taking device grabs the photovoltaic cell sheet, the telescopic structure is used to drive the photovoltaic cell sheet to switch between a planar state and a curved state; The image acquisition device is used to acquire the image of the photovoltaic cell; The control device is used to determine whether the photovoltaic cell is a normal cell or a defective cell based on the image of the photovoltaic cell.

2. The whole chip system according to claim 1, characterized in that: The grabbing structure is arranged at the middle position of the base, and the telescopic structure is arranged at a position close to the edge of the base.

3. The whole chip system according to claim 1, characterized in that: There are multiple telescopic structures, and at least two of the multiple telescopic structures are located on two opposite sides of the grasping structure.

4. The whole chip system according to claim 1, characterized in that: The telescopic structure comprises a fixed portion fixedly arranged on the base and a telescopic portion connected to the fixed portion, and the telescopic portion is used to move at least a portion of the photovoltaic cell sheet opposite to the telescopic portion away from the base.

5. The whole chip system according to claim 4, characterized in that: The telescopic structure also includes a gripping portion for gripping the photovoltaic cell, wherein the gripping portion is disposed at an end of the telescopic portion away from the fixing portion, and the telescopic portion is used to move at least a portion of the photovoltaic cell opposite to the telescopic portion away from and / or closer to the base.

6. The whole chip system according to any one of claims 1 to 5, characterized in that: The base is a frame structure, and the frame structure includes a first frame and a second frame connected to the first frame; The telescopic structure and the grasping structure are arranged on a side of the first frame away from the second frame; The image acquisition device is arranged on the second frame and is located on a side of the second frame facing the first frame, and the image acquisition device is opposite to the grasping structure.

7. The whole chip system according to any one of claims 1 to 5, characterized in that: The sheet-forming system further comprises a sheet-forming device, which comprises a plurality of sheet-forming parts and a linear motion mechanism for driving the sheet-forming parts, each of the sheet-forming parts being used to align corresponding side surfaces of the stacked photovoltaic cells.

8. The whole chip system according to claim 7, characterized in that: The whole-sheet device further comprises a blowing mechanism, wherein the blowing mechanism has a plurality of blowing ports facing the side of the stacked photovoltaic cell sheets, and the plurality of blowing ports are arranged along a first direction; The first direction refers to the height direction of the stacked photovoltaic cells.

9. The whole chip system according to claim 8, characterized in that: The blowing port is a long strip-shaped hole, and the blowing port extends along a second direction, and the second direction is perpendicular to the first direction; or, A plurality of air blowing holes form the air blowing port, and in the same air blowing port, the plurality of air blowing holes are arranged along the second direction.

10. The whole chip system according to any one of claims 1 to 5, characterized in that: The whole sheet system further comprises a transverse shifting module which moves between various workstations, and the sheet picking device is arranged on the transverse shifting module.

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