Edge processing apparatus for solar cells and production line

Abstract

The novel type relates to a kind of solar cell edge processing equipment and production line, and edge processing equipment includes feeding mechanism, conveying belt and multi-station processing platform;Feeding mechanism is used to convey cell piece to conveying belt;Conveying belt is set in the side of feeding mechanism, and conveying belt receives the cell piece conveyed by feeding mechanism, and cell piece is conveyed to multi-station processing platform;Wherein, multi-station processing platform includes first processing station, second processing station and third processing station, which are sequentially arranged along the conveying direction of conveying belt, first processing station is used to clean the edge area of cell piece, second processing station is used to coat passivation layer on the edge area of cell piece, and third processing station is used to cure passivation layer, and the conveying direction of conveying belt sequentially passes through first processing station, second processing station and third processing station.Integrate three stations for cleaning, coating and curing in the same conveying belt, form a continuous automatic production line, facilitate efficient processing of cell piece.

Description

Technical Field

[0001] This application relates to the field of solar cell technology, and in particular to an edge processing device and production line for solar cells. Background Technology

[0002] Reducing the manufacturing cost of solar cells and improving power generation efficiency have always been development goals of the photovoltaic industry. Among these goals, reducing the consumption of the precious metal silver is a direction the industry has been continuously striving towards. Traditional crystalline silicon cells generally use silver paste to print electrodes, and the cost of silver paste accounts for a significant proportion of the total cost. Although copper electroplating can replace silver paste, its process is lengthy and has stringent requirements for the insulation protection of the cell sides, increasing process complexity. Furthermore, during cell production, processes such as laser scribing can cause micro-damage at the cell edges. These defects can lead to photogenerated carrier recombination, resulting in a decline in cell performance.

[0003] Currently, the solar cell industry lacks efficient and integrated edge processing systems. Edge processing of solar cells needs to be completed across multiple devices, which not only increases production time but also affects the overall line efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide an edge processing device and production line for solar cells to address the problems in the existing technology.

[0005] In a first aspect, this application provides an edge processing device for solar cells, including a feeding mechanism, a conveyor belt, and a multi-station processing platform; the feeding mechanism is used to convey solar cells to the conveyor belt; the conveyor belt is disposed on one side of the feeding mechanism, the conveyor belt receives the solar cells conveyed by the feeding mechanism, and conveys the solar cells to the multi-station processing platform;

[0006] The multi-station processing platform includes a first processing station, a second processing station, and a third processing station arranged sequentially along the conveyor belt. The first processing station is used to clean the edge area of ​​the battery cell, the second processing station is used to coat the edge area of ​​the battery cell with a passivation layer, and the third processing station is used to cure the passivation layer. The conveyor belt passes through the first processing station, the second processing station, and the third processing station sequentially along the conveyor belt.

[0007] Optionally, the first processing station is provided with:

[0008] The first support platform is used to support the battery cells;

[0009] The cleaning mechanism is positioned facing the first support platform;

[0010] A drying nozzle is located downstream of the cleaning mechanism along the conveying direction, and the drying nozzle is positioned facing the first support platform.

[0011] Optionally, the cleaning mechanism includes a cleaning fluid nozzle and a pure water nozzle;

[0012] The cleaning fluid nozzle, the pure water nozzle, and the drying nozzle are integrated on the same cleaning arm, and the cleaning arm is movable relative to the first support platform.

[0013] Optionally, the second processing station is provided with:

[0014] Second support platform;

[0015] A vacuum suction cup is used to adsorb the battery cell to fix it in place;

[0016] A coating mechanism for applying a coating to the edge areas of the battery cell;

[0017] The first driving mechanism is connected to the vacuum suction cup drive to drive the vacuum suction cup to rotate, thereby driving the battery cell to rotate, so as to adjust the relative position of the battery cell and the coating mechanism.

[0018] Optionally, the coating mechanism includes:

[0019] A scraper, the blade of which abuts against the edge region of the battery cell;

[0020] Paint container, used to hold paint;

[0021] A peristaltic pump is connected to both the material box and the scraper, and the peristaltic pump pumps the paint in the material box to the scraper;

[0022] The second drive mechanism is connected to the scraper drive to drive the scraper to scrape and spread the coating evenly on the edge area of ​​the battery cell.

[0023] Optionally, the second processing station is further provided with:

[0024] A camera is mounted above the second processing station and aimed at the second support platform to capture images of the battery cells;

[0025] A marking device is positioned toward the battery cell and is used to mark the edge area to be coated on the surface of the battery cell.

[0026] Optionally, the marking device is a laser, which engraves a coating width marking line on the surface of the battery cell.

[0027] Optionally, the third processing station is provided with:

[0028] Third support platform;

[0029] A heating device is connected to the third support platform, and the heating device heats the third support platform to heat the battery cells on the third support platform;

[0030] A curing device is located above the heating device and facing the third support platform. The curing device includes an ultraviolet lamp assembly.

[0031] Optionally, it also includes:

[0032] The third drive mechanism is driven and connected to the third support platform. The third drive mechanism moves up and down to adjust the distance between the third support platform and the curing device.

[0033] In a second aspect, this application provides a solar cell production line, including the edge processing equipment for solar cells as described in the first aspect;

[0034] The solar cell production line also includes a dicing machine and an electroplating electrode machine. Along the production line process direction, the edge processing equipment for the solar cells is located at the downstream station of the dicing machine and the upstream station of the electroplating electrode machine.

[0035] This novel edge processing equipment and production line for solar cells integrates three stations—cleaning, coating, and curing—onto a single conveyor belt. The conveyor belt's path sequentially passes through the first, second, and third processing stations, seamlessly connecting the three independent processing steps to form a continuous automated production line. This facilitates efficient processing of solar cells. In this embodiment, edge cleaning, passivation repair, and insulation protection of solar cells can be completed using the edge processing equipment, eliminating the need to transfer solar cells back and forth between multiple devices. This simplifies the edge processing process, saves processing time, and improves production efficiency. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of an edge processing device for a solar cell provided in one embodiment;

[0038] Figure 2 This is a schematic diagram of the second processing station of the edge processing device for a solar cell provided in one embodiment;

[0039] Figure 3This is a schematic diagram of the battery cells after they have been transported to the second processing station according to one embodiment;

[0040] Figure 4 This is a schematic diagram of coating the edge region of the battery cell at the second processing station according to one embodiment;

[0041] Figure 5 This is a schematic diagram of a slide provided in one embodiment;

[0042] Figure 6 This is a diagram showing the position of the battery cell on the slide when the edge region of the battery cell is coated, as provided in one embodiment.

[0043] Figure 7 This is a diagram showing the position of the battery cell on the slide when coating the corner edge of the battery cell in one embodiment.

[0044] Figure 8 This is a schematic diagram of a battery cell provided in one embodiment;

[0045] Figure 9 for Figure 8 A schematic diagram of the edge region of the solar cell;

[0046] Figure 10 This is a schematic diagram of a battery cell provided in one embodiment;

[0047] Figure 11 for Figure 10 A schematic diagram of the edge region of the solar cell.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Feeding mechanism; 2. Conveyor belt; 3. Multi-station processing platform; 4. Battery cell; 5. First processing station; 6. Second processing station; 61. Second support platform; 611. Opening; 62. Vacuum suction cup; 63. Coating mechanism; 631. Scraper; 64. First drive mechanism; 641. Coupling; 7. Third processing station; 8. Slide table; 9. Unloading mechanism. Detailed Implementation

[0050] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0052] With the continuous development of solar cell technology, back-contact (BC) cells, with no grid lines obstructing the front side, exhibit high conversion efficiency. However, traditional BC cells use silver paste to prepare electrodes, resulting in high silver paste consumption and production costs. Secondly, there is a lack of efficient repair methods for edge damage caused by laser scribing, leading to increased carrier recombination and decreased cell performance. Furthermore, the electroplating electrode process requires insulation on the cell sides, which current technologies require multiple independent steps, resulting in complex processes and significant equipment investment. Meanwhile, ultraviolet (UV) irradiation technology, which can improve efficiency, has not yet been effectively integrated into production lines.

[0053] According to an exemplary embodiment, this application provides an edge processing device for a solar cell, referring to... Figure 1 As shown, the edge processing equipment includes a loading mechanism 1, a conveyor belt 2, and a multi-station processing platform 3. The loading mechanism 1 is used to convey battery cells 4 to the conveyor belt 2. The loading mechanism 1 can be an automatic loading robot or a loading basket. The loading mechanism 1 takes the battery cells 4 to be processed from the upstream process or the material box and places them at the starting end of the conveyor belt 2. The conveyor belt 2 is located on one side of the loading mechanism 1. The conveyor belt 2 receives the battery cells 4 conveyed by the loading mechanism 1 and conveys the battery cells 4 to the multi-station processing platform 3. The conveyor belt 2 is located downstream of the loading mechanism 1 and can be a belt conveyor or a roller conveyor.

[0054] The multi-station processing platform 3 includes a first processing station 5, a second processing station 6, and a third processing station 7 arranged sequentially along the conveying direction of the conveyor belt 2. The first processing station 5 is used to clean the edge area of ​​the battery cell 4, the second processing station 6 is used to coat the edge area of ​​the battery cell 4 with a passivation layer, and the third processing station 7 is used to cure the passivation layer. The conveyor belt 2 passes through the first processing station 5, the second processing station 6, and the third processing station 7 sequentially along the conveying direction.

[0055] The edge processing equipment provided in this embodiment integrates three stations for cleaning, coating, and curing onto the same conveyor belt 2. The conveyor belt 2 passes sequentially through the first processing station 5, the second processing station 6, and the third processing station 7, thereby seamlessly connecting the three independent processing steps to form a continuous automated production line. This facilitates efficient processing of solar cells. The edge processing equipment in this embodiment can complete edge cleaning, passivation repair, and insulation protection of solar cells without having to transfer solar cells back and forth between multiple devices, simplifying the edge processing process, saving edge processing time, and improving production efficiency.

[0056] In some embodiments, refer to Figure 1 As shown, the first processing station 5 is used to clean and dry the cut edge area of ​​the battery cell 4 to remove contaminants and debris remaining in the edge area of ​​the battery cell 4 after dicing.

[0057] The first processing station 5 is equipped with a first support platform, a cleaning mechanism, and a drying nozzle. The first support platform is used to support the battery cells 4; the cleaning mechanism is positioned facing the first support platform; the drying nozzle is located downstream of the cleaning mechanism along the conveying direction, and faces the first support platform. Along the conveying direction of the battery cells 4, the drying nozzle is located downstream of the cleaning mechanism and is used to blow away the battery cells 4 to quickly dry the edges of the cleaned battery cells 4, ensuring the cleanliness and dryness of the subsequent coating area.

[0058] In some embodiments, the cleaning mechanism includes a cleaning fluid nozzle 1 and a pure water nozzle 2. The cleaning fluid nozzle 1 is used to spray cleaning fluid toward the battery cell 4. For example, the cleaning fluid may be an alkaline solution (such as KOH solution) of a certain concentration (e.g., 0.5%~10%). The pure water nozzle 2 is used to spray pure water onto the battery cell 4 to rinse away any residual alkaline solution.

[0059] The cleaning fluid nozzle 1, the pure water nozzle 2, and the drying nozzle are integrated on the same cleaning arm, which is movable relative to the first support platform. This allows the cleaning arm to be moved to clean each side of the battery cell 4.

[0060] Thus, the first processing station 5 integrates components for chemical cleaning, water rinsing, and purging and drying. The cleaning, rinsing, purging and drying process of the edge area of ​​the battery cell 4 can be completed at the first processing station 5. The first processing station 5 has a compact structure and high processing efficiency.

[0061] In some embodiments, refer to Figure 2 As shown, the second processing station 6 is used to coat the edge area of ​​the cleaned and dried battery cell 4 with polymer ink to passivate and insulate the edge area of ​​the battery cell 4.

[0062] Reference Figure 2As shown, the second processing station 6 is equipped with a second support platform 61, a vacuum suction cup 62, a coating mechanism 63, and a first driving mechanism 64. The second support platform 61 is located on the conveyor path of the conveyor belt 2 and is used to receive and temporarily support the battery cells 4 transported by the conveyor belt 2 from upstream. The second support platform 61 may have multiple openings 611. The vacuum suction cup 62 may be built into the second support platform 61 or located below it, as shown in the figure. Figure 3 As shown, the vacuum suction cup 62 is used to adsorb the battery cell 4 to fix the battery cell 4. When the battery cell 4 is transported to the predetermined position of the second support platform 61, the vacuum suction cup 62 can adsorb the battery cell 4 by negative pressure, thereby fixing the battery cell 4 firmly. The coating mechanism 63 is used to coat the edge area of ​​the battery cell 4 with coating material. The first drive mechanism 64 is drivenly connected to the vacuum suction cup 62 to drive the vacuum suction cup 62 to rotate, thereby driving the battery cell 4 to rotate, so as to adjust the relative position of the battery cell 4 and the coating mechanism 63.

[0063] Reference Figure 2 , Figure 3 As shown, the first drive mechanism 64 can be a servo motor or a stepper motor. The first drive mechanism 64 directly drives the vacuum suction cup 62 and the battery cell 4 it adsorbs to move together through the coupling 641. (Refer to...) Figure 4 As shown, the first driving mechanism 64 can drive the vacuum suction cup 62 and the battery cell 4 it adsorbs to rise and adjust the angle of the vacuum suction cup 62 so that the battery cell 4 tilts towards the coating mechanism 63, and adjust the relative position of the edge area of ​​the battery cell 4 with the coating mechanism 63 so that the coating mechanism 63 can accurately coat the edge area of ​​the battery cell 4. After the coating mechanism 63 completes the coating, the first driving mechanism 64 drives the vacuum suction cup 62 and the battery cell 4 it adsorbs to reset, and the battery cell 4 can continue to be conveyed along the conveyor belt 2.

[0064] In some embodiments, refer to Figure 4 The coating mechanism 63 includes a scraper 631, a material box, and a peristaltic pump. The blade of the scraper 631 abuts against the edge area of ​​the battery cell 4. The material box is used to hold the coating. The peristaltic pump is connected to the material box and the scraper 631 respectively, and the peristaltic pump pumps the coating in the material box to the scraper 631. The second drive mechanism is driven to the scraper 631 to drive the scraper 631 to scrape and spread the coating on the edge area of ​​the battery cell 4.

[0065] In some embodiments, refer to Figure 4 , Figure 5 The second processing station 6 is also equipped with a slide table 8, and the scraper 631 of the coating mechanism 63 is positioned facing the slide table 8. After the first driving mechanism 64 drives the vacuum suction cup 62 and the battery cell 4 it adsorbs to rise, it drives the vacuum suction cup 62 to adjust the angle to stand the battery cell 4 on the slide table 8. The edge area of ​​the battery cell 4 to be coated is positioned against the slide table 8 so as to facilitate the adjustment of the position of the scraper 631 to coat the edge area of ​​the battery cell 4.

[0066] In some embodiments, refer to Figure 5 The slide table 8 has a positioning groove 81, the length of which is at least greater than the length of the longest side of the battery cell 4. After the first drive mechanism 64 drives the vacuum suction cup 62 and the battery cell 4 it adsorbs to rise, it drives the vacuum suction cup 62 to adjust the angle to stand the battery cell 4 in the positioning groove 81, so as to adjust the position of the scraper 631 to coat the edge area of ​​the battery cell 4 to be coated.

[0067] In one example, refer to Figure 6 As shown, the side of the battery cell 4 stands in the positioning groove 81 to facilitate adjusting the position of the scraper 631 to coat the edge area of ​​the battery cell 4 to be coated. In another example, refer to... Figure 7 As shown, the corner of the battery cell 4 has a chamfer. When coating the chamfered area, the chamfer is placed in the positioning groove 81 so as to adjust the position of the scraper 631 to coat the edge area of ​​the battery cell 4 to be coated.

[0068] In some embodiments, the second processing station 6 is also provided with a camera (not shown) and a marking device (not shown).

[0069] The camera is mounted above the second processing station 6 and aligned with the second support platform to capture images of the battery cell 4. The camera can be mounted above the second support platform 61 via a bracket or gantry structure, with its optical lens axially aligned with the second support platform 61.

[0070] The marking device is positioned facing the solar cell 4 and is used to mark the edge area to be coated on the surface of the solar cell 4. The marking device can be mounted above the second support platform 61 via a bracket or gantry structure, with the working end of the marking device facing the second support platform 61.

[0071] After the battery cell 4 is transferred to the second support platform 61, the control terminal controls the camera to capture a high-resolution image of the battery cell 4 on the second support platform 61 to identify the outline, edge position, and pre-made identification marks of the battery cell 4, and determine the width of the edge area to be coated on the battery cell 4. The control terminal controls the marking device to laser-mark the boundary marking lines of the area to be coated on the surface of the battery cell 4, providing coating guidance for the subsequent coating mechanism 63, so that the coating process follows the preset width and path, and avoids coating material overflow or insufficient coverage.

[0072] In some embodiments, the marking device is a laser, which engraves a coating width marking line on the surface of the cell 4.

[0073] In one example, refer to Figure 8 As shown, battery cell 4 is a rectangular battery cell, and the corners of battery cell 4 are 90°. (Refer to...) Figure 9As shown, the edge contour of the battery cell 4 is S2. The marking device engraves the coating width marking line S1 on the surface of the battery cell 4. The area between the coating width marking line S1 and the edge contour S2 of the battery cell 4 is the edge area to be coated, and the width of the edge area is d.

[0074] In another example, refer to Figure 10 As shown, the corner of battery cell 4 has a chamfer of 135°, as shown in the reference. Figure 11 As shown, the edge contour of the battery cell 4 is S2. The marking device engraves the coating width marking line S1 on the surface of the battery cell 4. The area between the coating width marking line S1 and the edge contour S2 of the battery cell 4 is the edge area to be coated, and the width of the edge area is d.

[0075] In some embodiments, the third processing station 7 is used to cure the coated battery cell 4 on the edge area, so that the coating is completely cured. The third processing station 7 is provided with a third support platform, a heating device, and a curing device. The third support platform is used to receive and support the coated battery cell 4. The heating device is connected to the third support platform and heats the third support platform to heat the battery cell 4 on the third support platform. The heating device is a resistance heating wire, a hot fluid pipeline integrated inside the third support platform, or an infrared heating plate disposed below the third support platform. The third support platform heats the third support platform, thereby uniformly transferring heat to the battery cell 4 on it through heat conduction.

[0076] The curing device is located above the heating device and faces the third support platform. The curing device includes a UV lamp assembly. The curing device can be a UV lamp assembly, which includes one or more UV lamps of a specific wavelength (such as 365nm or 395nm). The UV lamps are used to emit ultraviolet light to perform photocuring treatment on the coated material.

[0077] In some embodiments, the third processing station 7 further includes a third driving mechanism, which is drivenly connected to the third support platform. The third driving mechanism moves up and down to adjust the distance between the third support platform and the curing device.

[0078] The third drive mechanism drives the third support platform and the battery cell 4 on it to move vertically up and down, thereby dynamically adjusting the working distance between the battery cell 4 and the ultraviolet lamp group of the curing device above. In this way, the distance between the battery cell 4 and the curing device can be adjusted according to the curing material coated on the edge area of ​​the battery cell 4, and the light intensity irradiated by the curing device onto the surface of the battery cell can be controlled, thereby optimizing the curing effect and efficiency.

[0079] In some embodiments, after curing at the third processing station 7, the battery cell 4 is conveyed to the next processing equipment via the unloading mechanism 9. The unloading mechanism 9 can be an automatic unloading robot or an unloading basket.

[0080] In some embodiments, the edge processing equipment for solar cells can be used in a production line for manufacturing silver-free back contact cells. The method for manufacturing silver-free back contact cells includes the following steps: providing a back contact cell precursor; depositing an insulating passivation layer on the surface of the back contact cell precursor; using a laser to open the insulating passivation layer in the N-region and P-region; sequentially depositing an AlSi seed layer and a Cu layer using a PVD process, followed by annealing; using screen printing technology to cover the non-metallized areas with a protective film, exposing the electrode areas; using laser scribing to divide the cells into the required sizes; performing alkaline cleaning, water washing, air drying, coating with polymer ink, and UV curing on the edges of the cells; electroplating to prepare copper electrodes; etching to remove the protective film and the seed layer in the non-electrode areas; and testing and fabricating the assembly.

[0081] In this embodiment, the edge processing equipment for solar cells performs alkaline cleaning, water washing, air drying, coating with polymer ink, and UV curing on the edges of the cell 4.

[0082] According to an exemplary embodiment, this embodiment provides a solar cell production line, including the edge processing equipment for solar cells described in the above embodiment; the solar cell production line also includes a dicing machine and an electroplating electrode machine, and the edge processing equipment for solar cells is located at the downstream station of the dicing machine and the upstream station of the electroplating electrode machine along the process direction of the production line.

[0083] The dicing equipment is used to divide the battery precursor into individual cells 4 that meet the module specifications through laser dicing and dicing processes; the solar cell edge processing equipment is used to receive the cells 4 from the dicing equipment and perform alkaline cleaning, water washing, air drying, coating with polymer ink, and UV curing on its cut edges; the electroplating electrode equipment is used to electroplat copper electrodes on the cells 4 that have undergone edge processing.

[0084] The edge processing equipment receives the freshly diced battery cells 4 from the dicing equipment. It immediately processes the cut edges of the battery cells 4, sequentially performing alkaline cleaning, water washing, air drying, coating with polymer ink, and UV curing to prevent edge contamination and performance degradation. After processing, the edge processing equipment transfers the battery cells 4 to the electroplating electrode equipment, where metal electrodes are formed through electroplating. The edges of the battery cells 4 processed by the edge processing equipment exhibit excellent passivation and insulation properties, meeting the requirements of the electroplating process. Ensuring reliable insulation of the edges of the battery cells 4 before electroplating fundamentally eliminates short circuits and leakage problems caused by copper deposition on the sides of the battery cells 4 during electroplating, significantly improving product yield and reliability, especially suitable for the production of batteries without silver back contacts.

[0085] The production line provided in this embodiment uses edge processing equipment to integrate all edge processing processes of the battery cell 4 into the edge processing equipment, so that it is no longer an isolated, offline extra step. This avoids the frequent turnover of the battery cell 4 between multiple independent devices, reduces transmission time and the risk of fragmentation, optimizes the production process, and improves the overall line efficiency.

[0086] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An edge processing device for solar cells, characterized in that, It includes a feeding mechanism, a conveyor belt, and a multi-station processing platform; the feeding mechanism is used to feed battery cells to the conveyor belt; the conveyor belt is located on one side of the feeding mechanism, the conveyor belt receives the battery cells fed by the feeding mechanism, and conveys the battery cells to the multi-station processing platform; The multi-station processing platform includes a first processing station, a second processing station, and a third processing station arranged sequentially along the conveyor belt. The first processing station is used to clean the edge area of ​​the battery cell, the second processing station is used to coat the edge area of ​​the battery cell with a passivation layer, and the third processing station is used to cure the passivation layer. The conveyor belt passes through the first processing station, the second processing station, and the third processing station sequentially along the conveyor belt.

2. The edge processing device for solar cells according to claim 1, characterized in that, The first processing station is equipped with: The first support platform is used to support the battery cells; The cleaning mechanism is positioned facing the first support platform; A drying nozzle is located downstream of the cleaning mechanism along the conveying direction, and the drying nozzle is positioned facing the first support platform.

3. The edge processing device for solar cells according to claim 2, characterized in that, The cleaning mechanism includes a cleaning fluid nozzle and a pure water nozzle; The cleaning fluid nozzle, the pure water nozzle, and the drying nozzle are integrated on the same cleaning arm, and the cleaning arm is movable relative to the first support platform.

4. The edge processing device for solar cells according to claim 1, characterized in that, The second processing station is equipped with: Second support platform; A vacuum suction cup is used to adsorb the battery cell to fix it in place; A coating mechanism for applying a coating to the edge areas of the battery cell; The first driving mechanism is connected to the vacuum suction cup drive to drive the vacuum suction cup to rotate, thereby driving the battery cell to rotate, so as to adjust the relative position of the battery cell and the coating mechanism.

5. The edge processing device for solar cells according to claim 4, characterized in that, The coating mechanism includes: A scraper, the blade of which abuts against the edge region of the battery cell; Paint container; A peristaltic pump is connected to both the material box and the scraper, and the peristaltic pump pumps the paint in the material box to the scraper; The second drive mechanism is connected to the scraper drive to drive the scraper to scrape and spread the coating evenly on the edge area of ​​the battery cell.

6. The edge processing device for solar cells according to claim 4, characterized in that, The second processing station is also equipped with: A camera is mounted above the second processing station and aimed at the second support platform to capture images of the battery cells; A marking device is positioned toward the battery cell and is used to mark the edge area to be coated on the surface of the battery cell.

7. The edge processing device for solar cells according to claim 6, characterized in that, The marking device is a laser, which engraves marking lines of the coating width on the surface of the battery cell.

8. The edge processing device for solar cells according to claim 1, characterized in that, The third processing station is equipped with: Third support platform; A heating device is connected to the third support platform, and the heating device heats the third support platform to heat the battery cells on the third support platform; A curing device is located above the heating device and facing the third support platform. The curing device includes an ultraviolet lamp assembly.

9. The edge processing device for solar cells according to claim 8, characterized in that, Also includes: The third drive mechanism is driven and connected to the third support platform. The third drive mechanism moves up and down to adjust the distance between the third support platform and the curing device.

10. A production line for solar cells, characterized in that, Includes the edge processing device for solar cells as described in any one of claims 1-9; The solar cell production line also includes a dicing machine and an electroplating electrode machine. Along the production line process direction, the edge processing equipment for the solar cells is located at the downstream station of the dicing machine and the upstream station of the electroplating electrode machine.

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