Laser transfer apparatus and photovoltaic cell production line

Abstract

The application relates to the technical field of battery piece production equipment, in particular to a laser transfer printing equipment and a photovoltaic cell production line. The laser transfer printing equipment comprises a first conveying mechanism, a second conveying mechanism and a transfer mechanism. A first detection mechanism in the first conveying mechanism is used for detecting whether a transfer substrate is contaminated, so that only a non-contaminated substrate can enter a printing station of the second conveying line to perform slurry printing. The transfer mechanism transfers the printed substrate to a transfer station of the second conveying mechanism, completes slurry transfer to a substrate, and returns the used substrate to the upstream of the first detection mechanism, thereby supporting recycling or re-detection of the substrate, reducing material waste and manual intervention cost. The entire laser transfer printing equipment realizes a closed loop of slurry transfer from the transfer substrate to the substrate, improves production efficiency through cooperation of the multiple conveying mechanisms, improves production capacity per unit time, and reduces production and manufacturing cost.

Description

Technical Field

[0001] This application relates to the field of solar cell production equipment technology, and in particular to a laser transfer printing device and a photovoltaic cell production line. Background Technology

[0002] In the solar cell manufacturing process, after the core functional layer is fabricated, electrode grid lines need to be further fabricated on its surface. This step directly affects the photoelectric conversion efficiency and current collection capability of the cell. Currently, the mainstream grid line fabrication technologies are printing (such as screen printing) and electroplating. Among them, screen printing occupies a high market share in global photovoltaic metallization due to its mature technology and low cost. However, due to the characteristics of the solar cell substrate and the process principle, the grid lines prepared by these traditional methods are difficult to overcome the high aspect ratio bottleneck. For example, the aspect ratio of screen-printed grid lines is usually below 24%, and grid breakage is prone to occur when the line width is reduced to below 30μm, resulting in an increased shading area and higher silver paste consumption, which restricts the improvement of cell performance.

[0003] To overcome this limitation, the industry has developed a composite process of "printing pre-printing - laser transfer": first, conductive paste is printed into a substrate with a grooved pattern, and then laser scanning is used to precisely transfer the paste to the surface of the solar cell. This technology can break through the linewidth limit of traditional screen printing, achieving fine grid lines below 25μm, significantly optimizing the aspect ratio and reducing paste consumption. However, existing solutions have obvious drawbacks: the existing printing equipment combined with laser transfer equipment lacks automation and the number of solar cells that a single machine can process for transfer simultaneously is insufficient, resulting in insufficient transfer workload per unit time. Ultimately, due to low production capacity, the overall production cost is relatively high. Utility Model Content

[0004] Therefore, it is necessary to provide a laser transfer printing device to address the above problems and solve the issues of low capacity and high cost of existing transfer printing devices.

[0005] On one hand, this application provides a laser transfer device, comprising:

[0006] A first conveying mechanism includes a first conveying line and a second conveying line; the first conveying line and the second conveying line have opposite transport directions; a first detection mechanism is provided on the first conveying line to detect whether the transfer substrate being conveyed on the first conveying line is contaminated, and the contaminated transfer substrate is output through the first conveying line, while the uncontaminated transfer substrate is transported through the second conveying line; the second conveying line has a printing station for printing paste on the transfer substrate at the printing station.

[0007] A second conveying mechanism, located beside the first conveying mechanism, is used to convey substrates, and the second conveying mechanism has a transfer station; and

[0008] A transfer mechanism is provided at the end of the second conveyor line to transfer the transfer substrate on the second conveyor line to the transfer station, so as to transfer the slurry on the transfer substrate to the substrate at the transfer station, and then transfer the transferred substrate after the transfer to the first conveyor line upstream of the first detection mechanism.

[0009] Optionally, in the laser transfer equipment described above, a printing device is provided at the printing station of the second conveyor line, and the printing device prints the transfer substrate located at the printing station with paste.

[0010] Optionally, in the laser transfer equipment described above, the printing station further includes:

[0011] A printing support platform is located below the printing apparatus;

[0012] A first transport assembly reciprocates between the second conveyor line and the printing station, transporting the transfer substrate located upstream of the printing station to the printing support table, and then transporting the printed transfer substrate to the second conveyor line downstream of the printing station.

[0013] Optionally, in the laser transfer equipment described above, the first transport component includes a first robotic arm located upstream of the printing support table and a second robotic arm located downstream of the printing support table. The first robotic arm is used to transfer the transfer substrate upstream of the printing support table to the printing support table, and the second robotic arm is used to transfer the transfer substrate on the printing support table to the downstream.

[0014] Optionally, in the laser transfer equipment described above, the printing station further includes:

[0015] Support member for supporting the transfer substrate;

[0016] A first driving component is connected to the support component to drive the support component to move between the upstream and downstream sides of the printing station.

[0017] The second driving member is connected to the first driving member to drive the first driving member and the support member to move in the vertical direction.

[0018] Optionally, in the laser transfer equipment described above, a first flipping mechanism is provided at the first conveyor line. The first flipping mechanism is located upstream of the first detection mechanism to flip the transfer substrate.

[0019] Optionally, in the laser transfer equipment described above, the second conveyor line further includes a second flipping mechanism, which is located downstream of the printing station to flip the transfer substrate after printing.

[0020] Optionally, in the laser transfer equipment described above, the second conveyor line further includes a buffer mechanism, which is located downstream of the printing station to buffer the transfer substrate after printing.

[0021] The caching mechanism includes:

[0022] Drive mechanism;

[0023] Two support plates are disposed on two opposite sides of the transfer base. Each support plate has multiple locking teeth on the side closest to the other support plate. The same transfer base is supported by at least two locking teeth located opposite each other on different support plates. Both support plates are connected to the drive mechanism and move up and down under the drive of the drive mechanism to store or release the transfer base.

[0024] Optionally, in the laser transfer equipment described above, a second inspection mechanism is also provided on the second conveyor line. The second inspection mechanism is located downstream of the printing station and is used to inspect the quality of the paste printed on the transfer substrate.

[0025] Optionally, in the laser transfer equipment described above, the second conveyor line also has a shooting station, which is located at or downstream of the transfer station. The shooting station is equipped with a shooting component, which is used to shoot the transfer substrate after the transfer is completed, and to determine whether the paste on the transfer substrate can be transferred again and whether there is any residue.

[0026] Optionally, in the laser transfer equipment described above, the transfer mechanism includes at least one carrying mechanism, and the carrying mechanism drives the transfer substrate to move between the second conveyor line, the transfer station, and the first conveyor line.

[0027] Optionally, in the above-described laser transfer equipment, the second conveying mechanism includes:

[0028] A third conveyor line is located upstream of the transfer station to transport the substrate to the upstream of the transfer station.

[0029] The fourth conveyor line is located downstream of the transfer station to transport the substrate that has been transferred out from downstream of the transfer station.

[0030] At least one second transport component, each of which reciprocates between the third transport line and the fourth transport line to transport the substrate from the third transport line to the transfer station for transfer, and transports the transferred substrate to the fourth transport line, and adjusts the position of the substrate according to the position of the slurry and the position of the substrate.

[0031] Optionally, in the above-described laser transfer equipment, the first transport assembly and the second transport assembly include:

[0032] A support platform is used to support the substrate;

[0033] A first drive mechanism is connected to the support platform to drive the support platform to rotate;

[0034] The second drive mechanism is connected to the first drive mechanism to drive the first drive mechanism and the support platform to move along a first preset direction;

[0035] A third drive mechanism is connected to the second drive mechanism to drive the second drive mechanism, the first drive mechanism, and the support platform to move vertically; and

[0036] A fourth drive mechanism is connected to the third drive mechanism to drive the third drive mechanism, the second drive mechanism, the first drive mechanism, and the support platform to move between the first conveying mechanism and the second conveying mechanism.

[0037] Optionally, the aforementioned laser transfer equipment may also include:

[0038] A laser processing device is disposed at the transfer station and located above the substrate;

[0039] An adjustment mechanism, which corresponds to the position of the transfer station and is connected to the laser processing device, is used to adjust the position of the laser processing device according to the position of the slurry.

[0040] Optionally, in the laser transfer equipment described above, a surface treatment device may be provided between the input end and the output end of the first conveyor line, for surface treatment of the dirty transfer substrate output from the output end of the first conveyor line, and then entering the first conveyor line from the input end.

[0041] On the other hand, this application also proposes a photovoltaic cell production line, including the laser transfer equipment as described above.

[0042] The laser transfer equipment proposed in this application has at least the following beneficial effects:

[0043] This application discloses a laser transfer printing device, including a detection mechanism, a conveying mechanism, and a transfer mechanism. The first detection mechanism within the first conveying mechanism detects whether the transfer substrate is contaminated, ensuring that only uncontaminated substrates enter the printing station of the second conveyor line for ink printing, thus avoiding printing defects caused by substrate contamination. The transfer mechanism transports the printed substrate to the transfer station of the second conveyor mechanism, completing the transfer of ink to the substrate, and returns the used substrate upstream of the first detection mechanism, supporting substrate recycling or re-inspection, reducing material waste and manual intervention costs. The entire laser transfer printing device achieves a closed loop of ink transfer from the transfer substrate to the substrate. Through the cooperation of multiple conveying mechanisms, production efficiency is improved, the capacity per unit time is greatly increased, and manufacturing costs are reduced. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of a laser transfer device provided in one embodiment of this application.

[0045] Figure 2 This is a partial structural schematic diagram of a laser transfer device provided in one embodiment of this application.

[0046] Figure 3 This is a schematic diagram of the structure of the first transport component of a laser transfer device provided in an embodiment of this application.

[0047] Figure 4 This is a second partial structural schematic diagram of a laser transfer device provided in an embodiment of this application.

[0048] Figure 5 This is a schematic diagram of the structure of the second transport component of a laser transfer device provided in an embodiment of this application.

[0049] Figure 6 This is a schematic diagram of the buffer mechanism of a laser transfer device provided in an embodiment of this application.

[0050] Figure 7 This is an enlarged schematic diagram of part A of the buffer mechanism of a laser transfer device provided in an embodiment of this application.

[0051] Figure 8 This is a schematic diagram of the structure of the laser processing device and adjustment mechanism of a laser transfer equipment provided in an embodiment of this application.

[0052] Figure 9 This is a schematic diagram of the surface treatment apparatus of a laser transfer device provided in an embodiment of this application.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Laser transfer equipment; 101. First conveying mechanism; 102. Second conveying mechanism; 103. Transfer mechanism; 104. Support component; 105. First driving component; 106. Second driving component;

[0055] 110. First conveyor line; 111. First detection mechanism; 112. First tilting mechanism;

[0056] 120. Second conveyor line; 121. Printing support table; 122. First handling assembly; 123. Second flipping mechanism; 124. Buffer mechanism; 124A. Drive mechanism; 124B. Support plate; 124C. Clamping teeth; 125. Second detection mechanism; 126. Third detection mechanism; 127. Adjustment mechanism; 128. First robotic arm; 129. Second robotic arm;

[0057] 130. Third conveyor line; 140. Fourth conveyor line;

[0058] 150. Second conveying assembly; 151. Support platform; 152. First drive mechanism; 153. Second drive mechanism; 154. Third drive mechanism; 155. Fourth drive mechanism;

[0059] 160. Fourth inspection unit; 200. Substrate; 300. Transfer substrate; 400. Fifth inspection unit; 170. Laser processing device; 180. Adjustment mechanism; 190. Surface treatment device; 191. Nozzle; 192. Scraper; 193. First driving member; 194. Second driving member. Detailed Implementation

[0060] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0061] As a specific embodiment of this application, such as Figure 1 As shown, this application provides a laser transfer printing device 100. The laser transfer printing device 100 may include a first conveying mechanism 101, a second conveying mechanism 102, and a transfer mechanism 103.

[0062] In this embodiment, the first conveying mechanism 101 may include a first conveying line 110 and a second conveying line 120. In this embodiment, the first conveying line 110 is disposed on one side of the entire device, and the main conveying direction of the first conveying line 110 is from right to left (e.g., ...). Figure 2In the x-direction of the first conveyor line 110, the first conveyor line 110 may further include a feeding conveyor line on the right for feeding the transfer substrate 300, and a discharging conveyor line on the left for discharging the transfer substrate 300. The feeding conveyor line, the discharging conveyor line, and the main line of the first conveyor line 110 are transferred using loading and unloading machines. A first detection mechanism 111 is also provided on the first conveyor line 110 to detect whether the transfer substrate 300 conveyed on the first conveyor line 110 is contaminated, and to output contaminated transfer substrates 300 to the discharging conveyor line via the first conveyor line 110. The second conveyor line 120 is used to transport transfer substrates 300 that are determined to be uncontaminated after being detected by the first detection mechanism 111. In this embodiment, by providing a first detection mechanism 111 on the first conveyor line 110, it is ensured that only uncontaminated transfer substrates 300 enter the printing station of the second conveyor line 120 for paste printing, thereby avoiding printing defects caused by contamination and improving product consistency and yield.

[0063] For example, the transfer substrate 300 in this embodiment can be a glass substrate, the front side of which can be printed with paste, and the back side is translucent. In order to make the aspect ratio of the paste printed on the front side of the glass substrate large, the front side of the glass substrate can be treated to ensure that the water droplet angle on the front side of the glass substrate is greater than 100°. Specifically, the treatment methods include preparing an abnormal hydrophobic and oleophobic film on the front side of the glass substrate, or texturing the front side of the glass substrate to form a textured layer.

[0064] Specifically, in this embodiment, the second conveyor line 120 has the opposite transport direction to the first conveyor line 110, and the transport direction of the second conveyor line 120 is from left to right (e.g., ...). Figure 2 (in the y-direction). The second conveyor line 120 is set in the opposite direction to the first conveyor line 110, which optimizes the spatial layout and the rationality of the flow of the transfer substrate 300, reduces the overall footprint of the equipment and the transmission operation time, and improves the efficiency of the operation. Furthermore, in some embodiments, a printing device is provided at the printing station of the second conveyor line 120, and the printing device prints paste on the transfer substrate 300 located at the printing station.

[0065] Specifically, in this embodiment, the second conveying mechanism 102 is located on the side of the first conveying mechanism 101, such as... Figure 1 As shown, in this embodiment, the second conveyor line 120 is located between the first conveyor line 110 and the second conveyor mechanism 102. The second conveyor mechanism 102 is arranged parallel to the conveying direction of the second conveyor line 120. The second conveyor mechanism 102 is used to convey the substrate 200 and has a transfer station. After the paste printed on the transfer substrate 300 is transferred to the substrate 200 at the transfer station, the second conveyor mechanism 102 conveys the substrate 200 out.

[0066] For example, the specific structures of the first conveyor line 110, the second conveyor line 120, and the second conveyor mechanism 102 in this embodiment can be synchronous belt conveyors, roller conveyors, linear motor driven conveyors, or other mechanisms that can provide precise transportation for the transfer of the substrate 300 and the base plate 200. The second conveyor mechanism 102 can be equipped with multiple conveying stations to transport multiple sets of base plates 200.

[0067] Furthermore, such as Figure 2 As shown, in this embodiment, the transfer mechanism 103 is disposed at the end of the second conveyor line 120, and is used to transfer the transfer substrate 300 on the second conveyor line 120 to the transfer station, that is, the transfer mechanism 103 is disposed between the second conveyor line 120 and the transfer station of the second conveyor mechanism 102. After the slurry on the transfer substrate 300 is transferred to the substrate 200 at the transfer station, the transfer mechanism 103 then transfers the transferred substrate 300 to the upstream of the first detection mechanism 111 on the first conveyor line 110, where the first detection mechanism 111 detects whether it is contaminated.

[0068] The laser transfer printing equipment 100 proposed in this application, by setting a first detection mechanism 111 on the first conveyor line 110, and the transfer mechanism 103 conveying the transfer substrate 300 after transfer to the first detection mechanism 111 for detection, and the contaminated transfer substrate 300 being re-transferred to the second conveyor line 120 for printing, realizes the repeated recycling of the transfer substrate 300, reduces the waste of production materials, and improves the utilization rate of the transfer substrate 300. At the same time, multiple conveyor lines cooperate with each other. The first conveyor mechanism 101 provides the transfer substrate 300 printed with paste, the second conveyor mechanism 102 transports the substrate 200, and the paste transfer is completed at the transfer station. After the transfer is completed, the transfer substrate 300 and the substrate 200 are conveyed to the next station through different conveyor lines, which improves production efficiency and reduces the transfer cost of the laser transfer printing equipment 100.

[0069] As another specific embodiment of this application, the printing station of the laser transfer equipment 100 in this embodiment may further include a printing support table 121 and a first conveying assembly 122. The printing support table 121 is located below the printing device. The first conveying assembly 122 reciprocates between the upstream and downstream sides of the printing station on the second conveyor line 120.

[0070] like Figure 3As shown, the first transport assembly 122 may include a first robotic arm 128 and a second robotic arm 129. Under their respective driving forces, the first robotic arm 128 and the second robotic arm 129 can move vertically up and down and horizontally back and forth. The first robotic arm 128 is used to transport the unprinted transfer substrate 300 from the first conveyor line 110 to the printing support table 121. The second robotic arm 129 is used to transport the printed transfer substrate 300 from the printing support table 121 to the second conveyor line 120 downstream of the printing station. By combining the transport line with the printing equipment through the first transport assembly 122, the printing efficiency of the transfer substrate 300 is improved.

[0071] As another specific embodiment of this application, the laser transfer device 100 of this embodiment, such as Figure 9 As shown, the printing station also includes a support member 104, a first drive member 105, and a second drive member 106. The support member 104 supports the transfer substrate 300, providing a support platform for transporting the transfer substrate 300. The first drive member 105 is connected to the support member to move the support member 104 along the conveying direction of the second conveyor line 120, thereby moving the transfer substrate 300 between the upstream and downstream of the printing station. The second drive member 106 is connected to the first drive member 105, thereby moving the first drive member 105 and the support member 104 vertically up and down. In embodiments of this application, bidirectionally controlled drive members are arranged at the printing station to achieve efficient transfer of the transfer substrate 300 before and after the printing station.

[0072] As another specific embodiment of this application, in the laser transfer equipment 100 of this embodiment, the transfer mechanism 103 further includes at least one carrying mechanism, which is used to drive the transfer substrate 300 to move between the second conveyor line 120, the transfer station, and the first conveyor line 110. The carrying mechanism of the transfer mechanism 103 connects the transport lines of the first conveyor line 110, the transfer station, and the second conveyor line 120, facilitating the transfer of the transfer substrate 300. Specifically, multiple carrying mechanisms can be provided to speed up the transfer process.

[0073] As another specific embodiment of this application, in the laser transfer equipment 100 of this embodiment, a first flipping mechanism 112 is also provided on the first conveyor line 110, which is located upstream of the first detection mechanism 111. The first flipping mechanism 112 flips the transfer substrate 300 conveyed from the transfer station by 180° before conveying it to the first detection mechanism 111 for inspection to check for contamination. In this embodiment of the laser transfer equipment 100, because the paste surface (the lower surface of the transfer substrate 300 at the transfer station) is transferred during the transfer process, residues may adhere to the paste surface after use, or inspection may be required. After flipping, the "front" side, which will be used for the next printing, faces upwards, allowing the first detection mechanism 111 to directly detect contamination on the critical surface that will be reused, fundamentally ensuring the effectiveness of the inspection.

[0074] As another specific embodiment of this application, the laser transfer equipment 100 of this embodiment further includes a second flipping mechanism 123 at the second conveyor line 120, which is located downstream of the printing station. At the printing station, the paste is printed on the front side of the transfer substrate 300. After printing, the substrate is flipped 180° by the second flipping mechanism 123 so that the side with the paste is facing down. When the transfer mechanism 103 transports the transfer substrate 300 with the printed paste to the transfer station, the paste surface can directly face the waiting substrate 200 below, preparing for the subsequent laser transfer.

[0075] As another specific embodiment of this application, in the laser transfer device 100 of this embodiment, such as Figure 6-7As shown, the second conveyor line 120 also includes a buffer mechanism 124, located downstream of the printing station, to buffer the printed transfer substrate 300. The buffer mechanism 124 includes a drive mechanism 124A. Furthermore, two opposing support plates 124B are arranged on both sides in a direction perpendicular to the movement direction of the transfer substrate 300. Each support plate has multiple locking teeth 124C in the vertical direction, supporting the same transfer substrate 300 through the corresponding two locking teeth 124C on both sides. The drive mechanism 124A is connected to the support plates 124B to simultaneously raise and lower the two opposing support plates 124B on the same transfer substrate 300, storing or releasing the transfer substrate 300. When buffering is required, the transfer substrate 300 is conveyed between the support plates 124B, and the drive mechanism 124A drives the support plates 124B to rise, causing the locking teeth 124C at a specific height to hold the edge of the transfer substrate 300 for storage. During release, the support plate 124B descends, placing the transfer substrate 300 back onto the conveyor line. The buffer mechanism 124 of this application uses a support plate 124B with multi-stage locking teeth 124C to support the transfer substrate 300, and the lifting and lowering of the support plate 124B is precisely controlled by the drive mechanism 124A, thereby realizing the storage and release of the transfer substrate 300 with high space utilization.

[0076] As another specific embodiment of this application, in the laser transfer printing equipment 100 of this embodiment, a second inspection mechanism 125 is further provided on the second conveyor line 120. The second inspection mechanism 125 is located downstream of the printing station and is used to inspect the quality of the paste printed on the transfer substrate 300. Transfer substrates 300 with acceptable printing quality are transported to the transfer station, while transfer substrates 300 with unacceptable printing quality are transported to the first conveyor line 110. By performing pre-judgment processing on the transfer substrates 300 before and after printing, unacceptable transfer substrates 300 are prevented from being transported to the transfer station, thereby improving the product yield of laser transfer printing.

[0077] In the laser transfer process, the quality of the paste on the transfer substrate 300 is one of the determining factors for the final quality of the paste transferred to the substrate 200. Its quality directly affects the accuracy and performance of subsequent gate line fabrication, thus becoming a core node in process quality control. This embodiment adds a second detection mechanism 125 to detect the paste on the transfer substrate 300, achieving precise control over the paste quality and ensuring the quality of the gate line fabrication on the substrate 200 from the source.

[0078] Compared to the traditional method of only inspecting the quality of the paste at the transfer substrate 300 after the grid lines are formed, this embodiment inspects the quality of the paste at the transfer substrate 300 before the transfer process. This avoids rework of the substrate 200 due to poor printing quality of the paste at the transfer substrate 300. This reduces the waste of valuable materials such as silver paste and ensures the stability and consistency of the grid line quality at the substrate 200, laying the foundation for the reliability of end products such as photovoltaic cells and semiconductor devices.

[0079] As another specific embodiment of this application, the second conveyor line 120 of the laser transfer equipment 100 in this embodiment may further include a third detection mechanism 126 and an adjustment mechanism 127. The third detection mechanism 126 is located between the second conveyor line 120 and the transfer mechanism 103. Before the transfer substrate 300 is transferred to the transfer station, the third detection mechanism 126 (such as a CCD vision system) detects the position of the ink printing position or alignment marks on it. The adjustment mechanism 127 is located below the third detection mechanism 126 and compensates for and corrects the detected positional deviation, adjusting the position of the transfer substrate 300. This eliminates the positional errors accumulated in previous processes, ensuring extremely high alignment accuracy between the transfer substrate 300 and the substrate 200 at the transfer station. The laser transfer equipment 100 of this embodiment, through the detection of the transfer substrate 300 by the third detection mechanism 126 and the adjustment of the position of the transfer substrate 300 by the adjustment mechanism 127, ensures the transfer accuracy of the ink from the transfer substrate 300 to the substrate 200, thereby greatly improving product yield.

[0080] As a specific embodiment of this application, the second conveyor line 120 of this embodiment has a shooting station, which is located at the transfer station or downstream of the transfer station. A shooting component (not shown in the figure) is provided at the shooting station. The shooting component is used to shoot the transfer substrate 300 after the transfer is completed, and to determine whether the slurry on the transfer substrate 300 can be transferred again and whether there is any residue.

[0081] When the paste is still ready for the next transfer, only the substrate 200 with paste is transported away, and a clean substrate 200 is transported. The paste on the transfer substrate 300 is used again to transfer the next substrate 200. This process is repeated until no more paste needs to be transferred, or the paste on the transfer substrate 300 can no longer be transferred, at which point the transfer substrate 300 is output from the transfer station.

[0082] In another embodiment, the imaging station can be located downstream of the transfer station. After the transfer substrate 300 is transferred, the turntable on the second conveyor line 120 transports the transfer substrate 300 to the imaging station. When the slurry at the transfer substrate 300 can still be transferred again, the transfer substrate 300 is transported to the transfer station for transfer. This process is repeated until it can no longer be transferred.

[0083] Of course, after the imaging component takes a picture of the transfer substrate 300, in addition to knowing whether there is still slurry on the transfer substrate 300, it can also know whether there is any slurry residue on the transfer substrate 300.

[0084] As another specific embodiment of this application, the laser transfer equipment 100 of this embodiment further includes a fourth detection mechanism 160 at the second conveying mechanism 102. The fourth detection mechanism 160 is located at the process station preceding the transfer station and is used to detect the position of the substrate 200. By setting the fourth detection mechanism 160 to detect the position of the substrate 200 before transfer, and corresponding it with the adjusted position information of the transfer substrate 300, the precise matching of the transfer substrate 300 and the substrate 200 at the transfer station is achieved, eliminating the positional deviation generated during the incoming transport of the substrate 200, thereby reducing the probability of misalignment during slurry transfer and ensuring the final slurry alignment accuracy and product yield.

[0085] For example, the aforementioned imaging components, first detection mechanism 111, second detection mechanism 125, third detection mechanism 126, and fourth detection mechanism 160 may be one or more CCD image acquisition modules or other optical detection systems, used to take pictures of the transfer substrate 300 or substrate 200, analyze and judge them through internal image processing software, and finally send the judgment results to the conveyor line control system, which makes corresponding decisions. In this embodiment, the third detection mechanism 126 and the fourth detection mechanism 160 each include four high-precision cameras, which take real-time pictures of the transfer substrate 300 and substrate 200 respectively.

[0086] In some other embodiments, such as Figure 2 As shown, the laser transfer equipment 100 may also include a fifth inspection mechanism 400, which is located upstream of the printing station and is used to inspect the transfer substrate 300 before printing.

[0087] As another specific embodiment of this application, the second conveying mechanism 102 of the laser transfer equipment 100 of this embodiment may include a third conveying line 130, a fourth conveying line 140 and at least one second handling component 150.

[0088] Specifically, in this embodiment, the third conveyor line 130 is located upstream of the transfer station to transport the substrate 200 upstream of the transfer station. The fourth conveyor line 140 is located downstream of the transfer station to transport the substrate 200, after transfer, out of the transfer station. Each second handling component 150 reciprocates between the rear end of the third conveyor line 130 and the front end of the fourth conveyor line 140 to transport the substrate 200 from the third conveyor line 130 to the transfer station for transfer, and then transfers the substrate 200 after transfer to the fourth conveyor line 140.

[0089] Specifically, in this embodiment, the second transport component 150 adjusts and corrects the position of the substrate 200 according to the detection data of the fourth detection mechanism 160 on the substrate 200 before transfer and the detection results of the third detection mechanism 126 on the paste position of the transfer substrate 300. The second transport component 150 of this application can ensure that the paste pattern on the transfer substrate 300 is precisely aligned with the target position on the substrate 200, fundamentally improving the accuracy and product yield of laser transfer printing, and providing possibilities for subsequent high-end precision device manufacturing.

[0090] For example, two or more second transport components 150 can be provided to simultaneously adjust the positions of multiple substrates 200.

[0091] As another specific embodiment of this application, the laser transfer device 100 of this embodiment may include at least one support platform 151, a first drive mechanism 152, a second drive mechanism 153, a third drive mechanism 154, and a fourth drive mechanism 155 in each first transport component 122 and second transport component 150. Figure 5 As shown, multiple support platforms 151 are respectively applied to support multiple substrates 200. A first drive mechanism 152 is connected to the support platform 151 to drive the support platform 151 to rotate. A second drive mechanism 153 is connected to the first drive mechanism 152 to drive the first drive mechanism 152 and the support platform 151 to move along the horizontal plane in a direction perpendicular to the conveying direction of the second conveying mechanism 102. A third drive mechanism 154 is connected to the second drive mechanism 153 to drive the second drive mechanism 153, the second drive mechanism 153, and the support platform 151 to move in a vertical direction. A fourth drive mechanism 155 is connected to the third drive mechanism 154 to drive the third drive mechanism 154, the second drive mechanism 153, the first drive mechanism 152, and the support platform 151 to move between the first conveying mechanism 101 and the second conveying mechanism 102, respectively.

[0092] In this embodiment, the support platform 151 can be driven to move in three directions and rotate through the first drive mechanism 152, the second drive mechanism 153, the third drive mechanism 154 and the fourth drive mechanism 155, so that the position of the substrate 200 placed on the platform can be well adjusted to meet the requirements of slurry transfer.

[0093] As another specific embodiment of this application, such as Figure 8 The laser transfer equipment 100 of this embodiment may further include a laser processing device 170 and an adjustment mechanism 180. The laser processing device 170 is disposed at the transfer station and located above the substrate 200. When the transfer substrate 300 is transported to the transfer station, the laser processing device 170 irradiates the back side of the transfer substrate 300 and transfers the paste on the transfer substrate 300 to the substrate 200 located below the transfer substrate 300. The adjustment mechanism 180 corresponds to the position of the transfer station and is connected to the laser processing device 170, used to adjust the position of the laser processing device 170 according to the position of the paste.

[0094] As another specific embodiment of this application, the laser transfer device 100 of this embodiment, such as Figure 9 As shown, a surface treatment device 190 can be installed between the input and output ends of the first conveyor line 110. This device treats the contaminated transfer substrate 300 output from the output end of the first conveyor line 110 before it re-enters the first conveyor line 110 from the input end. The surface treatment device 190 includes a nozzle 191 and / or a scraper 192. The nozzle 191 is positioned at the surface treatment station and sprays cleaning liquid or gas onto the transfer substrate 300. The scraper 192 is positioned at the surface treatment station and scrapes away residual slurry on the transfer substrate 300. The cleaning liquid cleans the residual slurry on the transfer substrate 300, while the scraper 192 directly scrapes away the slurry. When both are used simultaneously, the nozzle 191 sprays the cleaning liquid onto the front of the transfer substrate 300, and then the scraper 192 scrapes it, thus removing the slurry from the transfer substrate 300 more quickly.

[0095] Of course, in other embodiments, the slurry can also be removed by laser. The surface treatment device 190 may also include a first driving member 193 and a second driving member 194, which drive the nozzle 191 and the scraper 192 to move in the vertical and horizontal directions, respectively, to ensure smooth cleaning.

[0096] The structure and operating principle of the entire laser transfer equipment 100 in this embodiment are as follows:

[0097] The first conveying mechanism 101 of the laser transfer equipment 100 includes a first conveyor line 110 and a second conveyor line 120 with opposite flow directions, and integrates multiple stations and mechanisms such as contamination detection, paste printing, quality inspection, position calibration, buffering, and flipping. The second conveying mechanism 102 is used to transport the substrate 200, and is responsible for the transport and precise positioning of the substrate 200 through a third conveyor line 130, a fourth conveyor line 140, and a second handling component 150 with multi-degree-of-freedom and multi-directional adjustment capabilities. At the transfer station, the final transfer action is performed in cooperation with the laser processing device 170 and the adjustment mechanism 180.

[0098] Specifically, the transfer substrate 300 is first inspected and screened by the first inspection mechanism 111 on the first conveyor line 110. Contaminated transfer substrates 300 are conveyed out, while uncontaminated transfer substrates 300 enter the second conveyor line 120 to complete paste printing at the printing station. Subsequently, the second inspection mechanism 125 inspects the printing quality of the paste. Before transfer, qualified transfer substrates 300 undergo position adjustment by the third inspection mechanism 126 and the adjustment mechanism 127. Simultaneously, the substrate 200 is transported by the second conveyor mechanism 102 to the transfer station, where its position is determined by the fourth inspection mechanism 160. Subsequently, the second handling assembly 150 adjusts the position of the substrate 200 according to the position data of the substrate 200 and the paste, matching it with the positioned transfer substrate 300. Finally, the laser processing device 170 performs laser irradiation, transferring the paste from the transfer substrate 300 to the substrate 200. The transferred substrate is returned to the first conveyor line 110 for contamination inspection, achieving recycling, while the transferred substrate 200 is output to the next station. The entire transfer equipment uses a multi-level detection, feedback and adjustment mechanism to ensure extremely high alignment accuracy and transfer quality, significantly improving product yield and production efficiency while reducing transfer costs.

[0099] On the other hand, this application also proposes a photovoltaic cell production line, including the laser transfer equipment 100 as described above. The photovoltaic cell production line proposed in this application, by combining the laser transfer equipment 100 with the photovoltaic cell production line, utilizes the multi-level detection and adjustment mechanism of the laser transfer equipment 100 to achieve precise transfer of the paste, thereby increasing the product capacity of photovoltaic cells and reducing the production cost of the production line.

[0100] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0101] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0102] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0103] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0104] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A laser transfer printing device, characterized in that, include: The first conveying mechanism includes a first conveying line and a second conveying line; the first conveying line and the second conveying line have opposite transport directions; a first detection mechanism is provided on the first conveying line to detect whether the transfer substrate being transported on the first conveying line is contaminated, and the contaminated transfer substrate is output through the first conveying line, while the uncontaminated transfer substrate is transported through the second conveying line. The second conveyor line has a printing station for printing paste onto the transfer substrate at the printing station; The second conveying mechanism is located on the side of the first conveying mechanism and is used to convey the substrate, and the second conveying mechanism has a transfer station; and A transfer mechanism is provided at the end of the second conveyor line to transfer the transfer substrate on the second conveyor line to the transfer station, so as to transfer the slurry on the transfer substrate to the substrate at the transfer station, and then transfer the transferred substrate after the transfer to the first conveyor line upstream of the first detection mechanism.

2. The laser transfer equipment according to claim 1, characterized in that, A printing device is provided at the printing station of the second conveyor line, and the printing device prints the paste onto the transfer substrate located at the printing station.

3. The laser transfer equipment according to claim 2, characterized in that, The printing station also includes: A printing support platform is located below the printing apparatus; A first transport assembly reciprocates between the second conveyor line and the printing station, transporting the transfer substrate located upstream of the printing station to the printing support table, and then transporting the printed transfer substrate to the second conveyor line downstream of the printing station.

4. The laser transfer equipment according to claim 3, characterized in that, The first transport assembly includes a first robotic arm located upstream of the printing support platform and a second robotic arm located downstream of the printing support platform. The first robotic arm is used to transfer the transfer substrate upstream of the printing support platform to the printing support platform, and the second robotic arm is used to transfer the transfer substrate on the printing support platform to the downstream.

5. The laser transfer equipment according to claim 2, characterized in that, The printing station also includes: Support member for supporting the transfer substrate; A first driving component is connected to the support component to drive the support component to move between the upstream and downstream sides of the printing station. The second driving member is connected to the first driving member to drive the first driving member and the support member to move in the vertical direction.

6. The laser transfer equipment according to claim 1, characterized in that, A first flipping mechanism is provided at the first conveyor line. The first flipping mechanism is located upstream of the first detection mechanism to flip the transfer substrate.

7. The laser transfer equipment according to claim 1, characterized in that, The second conveyor line also includes a second flipping mechanism, which is located downstream of the printing station to flip the transfer substrate after printing.

8. The laser transfer equipment according to claim 1, characterized in that, The second conveyor line also includes a buffer mechanism located downstream of the printing station to buffer the transfer substrate after printing. The caching mechanism includes: Drive mechanism; Two support plates are disposed on two opposite sides of the transfer base. Each support plate has multiple locking teeth on the side closest to the other support plate. The same transfer base is supported by at least two locking teeth located opposite each other on different support plates. Both support plates are connected to the drive mechanism and move up and down under the drive of the drive mechanism to store or release the transfer base.

9. The laser transfer equipment according to claim 1, characterized in that, The second conveyor line is also equipped with a second inspection mechanism, which is located downstream of the printing station and is used to inspect the quality of the paste printed on the transfer substrate.

10. The laser transfer equipment according to claim 1, characterized in that, The second conveyor line also has a shooting station, which is located at or downstream of the transfer station. The shooting station is equipped with a shooting component, which is used to shoot the transfer substrate after the transfer is completed, and to determine whether the slurry on the transfer substrate can be transferred again and whether there is any residue.

11. The laser transfer equipment according to claim 1, characterized in that, The transfer mechanism includes at least one carrying mechanism, and the carrying mechanism drives the transfer base to move between the second conveyor line, the transfer station and the first conveyor line.

12. The laser transfer equipment according to claim 3, characterized in that, The second conveying mechanism includes: A third conveyor line is located upstream of the transfer station to transport the substrate to the upstream of the transfer station. The fourth conveyor line is located downstream of the transfer station to transport the substrate that has been transferred out from downstream of the transfer station. The second transport assembly reciprocates between the third transport line and the fourth transport line to transport the substrate from the third transport line to the transfer station for transfer, and then transfers the substrate after the transfer to the fourth transport line, and adjusts the position of the substrate according to the position of the slurry and the position of the substrate.

13. The laser transfer equipment according to claim 12, characterized in that, The first transport component and the second transport component include: A support platform is used to support the substrate; A first drive mechanism is connected to the support platform to drive the support platform to rotate; The second drive mechanism is connected to the first drive mechanism to drive the first drive mechanism and the support platform to move along a first preset direction; A third drive mechanism is connected to the second drive mechanism to drive the second drive mechanism, the first drive mechanism, and the support platform to move vertically; and A fourth drive mechanism is connected to the third drive mechanism to drive the third drive mechanism, the second drive mechanism, the first drive mechanism, and the support platform to move between the first conveying mechanism and the second conveying mechanism.

14. The laser transfer equipment according to claim 1, characterized in that, Also includes: A laser processing device is disposed at the transfer station and located above the substrate; An adjustment mechanism, which corresponds to the position of the transfer station and is connected to the laser processing device, is used to adjust the position of the laser processing device according to the position of the slurry.

15. The laser transfer equipment according to claim 1, characterized in that, A surface treatment device may also be provided between the input end and the output end of the first conveyor line to perform surface treatment on the transfer substrate with dirt output from the output end of the first conveyor line before it enters the first conveyor line from the input end.

16. A photovoltaic cell production line, characterized in that, The laser transfer device includes any one of claims 1-14.

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