Laser transfer apparatus and photovoltaic cell production line

Abstract

The application relates to a laser transfer printing device and a photovoltaic cell production line. The laser transfer printing device can include a vertical conveying mechanism, a printing device and a laser processing device. The vertical conveying mechanism can include at least one carrying structure, each carrying structure being used for carrying a transfer substrate and driving the transfer substrate to convey in a vertical plane. Since the vertical conveying mechanism conveys the transfer substrate in the vertical direction, the relative positions of the printing device and the laser processing device are also in the vertical direction, so that the occupied area of the entire laser transfer printing device can be reduced, more devices can be stored per unit area, or a smaller occupied area can be used under the same amount of production equipment, ultimately resulting in improved production efficiency per unit area and cost saving.

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 achieve precise transfer of the paste to the surface of the solar cell. This technology can break through the linewidth limit of traditional screen printing, achieve fine grid lines below 25μm, significantly optimize the aspect ratio and reduce paste consumption.

[0004] In existing technologies, most use horizontal conveying mechanisms to transport the transfer substrate. The horizontal conveying mechanism transports the transfer substrate to different positions on a horizontal plane to achieve different process steps, which makes the entire equipment occupy a large area and reduces the production efficiency per unit area. Utility Model Content

[0005] Therefore, it is necessary to provide a laser transfer printing device to address the above problems and solve the issues of large footprint and low unit production efficiency in existing technologies.

[0006] On one hand, this application provides an automated battery cell packaging system, comprising:

[0007] A vertical conveying mechanism includes at least one supporting structure, each of which carries a transfer substrate and drives the transfer substrate to be conveyed in a vertical plane; the vertical conveying mechanism has a printing station and a transfer station along the conveying direction; wherein the transfer substrate includes a front surface with one side being a flat surface and a back surface with the other side being a light-transmitting surface;

[0008] A printing apparatus, disposed at the printing station, is used to print paste onto the front side of the transfer substrate; and

[0009] A laser processing device is provided at the transfer station for irradiating the back side of the transfer substrate and transferring the paste on the transfer substrate to the substrate when the substrate and the transfer substrate are transported to the transfer station.

[0010] Optionally, the vertical conveying mechanism includes:

[0011] A rotating shaft that extends horizontally;

[0012] A turntable mechanism has at least one of the aforementioned support structures arranged on its radially outer side to support the transfer base; the turntable mechanism is rotatably connected to the rotation shaft so that the turntable mechanism is controlled to rotate along a vertical plane about the rotation shaft as an axis, thereby driving the transfer base to rotate along the vertical plane.

[0013] Optionally, the transfer station is located below the turntable mechanism;

[0014] The laser processing device is arranged above the transfer station so that the laser processing device emits a laser downward to hit the back of the transfer substrate below, thereby transferring the slurry on the transfer substrate to the substrate.

[0015] Optionally, a surface treatment station is also provided downstream of the transfer station;

[0016] The laser transfer equipment also includes a surface treatment device, which is located at the surface treatment station to process the transfer substrate at the surface treatment station when the transfer substrate requires surface treatment.

[0017] Optionally, the surface treatment apparatus includes:

[0018] A nozzle, disposed at the surface treatment station, is used to spray cleaning liquid or gas onto the transfer substrate; and / or

[0019] A scraper, located at the surface treatment station, is used to scrape off any residual slurry on the transfer substrate.

[0020] Optionally, the vertical conveying mechanism further includes a first shooting station, which is located between the surface treatment station and the transfer station;

[0021] A first imaging component is also provided at the first imaging station. The first imaging component is used to photograph 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.

[0022] Optionally, the vertical conveying mechanism further includes a second shooting station, which is located between the printing station and the transfer station, and in the rotation direction of the vertical conveying mechanism, the second shooting station is located downstream of the printing station. A second shooting component is provided at the second shooting station, which is used to capture the quality of the paste printed on the front side of the transfer substrate.

[0023] Optionally, it also includes:

[0024] A first conveyor line is used to convey the unprinted transfer substrate;

[0025] At least one first transfer mechanism is disposed between the first conveyor line and the conveying mechanism for transferring the transfer substrate on the first conveyor line to the printing station of the conveying mechanism.

[0026] Optionally, it further includes a substrate transport line, the substrate transport line comprising:

[0027] A second conveyor line is located in front of the transfer station to transport the unprinted substrate to the front of the transfer station.

[0028] The third conveyor line is located behind the transfer station to convey the substrate that has been transferred out from the rear of the transfer station.

[0029] At least one second transfer mechanism, each of which reciprocates between the rear end of the second conveyor line and the front end of the transfer station to transfer the substrate from the second conveyor line to the transfer station for transfer, and then transports the substrate after transfer to the third conveyor line, and adjusts the position of the substrate according to the position of the slurry.

[0030] Optionally, each of the first transfer mechanism and the second transfer mechanism includes:

[0031] At least one support platform is used to support the substrate;

[0032] A first drive mechanism is connected to the support platform to drive the support platform to rotate;

[0033] 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;

[0034] 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

[0035] 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 conveyor line and the printing station, and between the second conveyor line and the transfer station.

[0036] Optionally, the vertical conveying mechanism is a vertical circulating conveying mechanism. After the transfer substrate is transferred at the transfer station and there is no residue on the transfer substrate, the conveying mechanism conveys the transfer substrate to the printing station. When the transfer substrate is transferred at the transfer station and there is residue on the transfer substrate, the conveying mechanism conveys the transfer substrate to the surface treatment station for treatment, and then conveys it to the printing station for printing.

[0037] On the other hand, this application also provides a photovoltaic cell production line, including the laser transfer equipment described above.

[0038] The laser transfer equipment of this application may include a vertical conveying mechanism, a printing device, and a laser processing device. Since the vertical conveying mechanism transports the transfer substrate in the vertical direction, the relative positions of the printing device and the laser processing device are also in the vertical direction. This can reduce the area occupied by the entire laser transfer equipment, allowing more equipment to be stored per unit area, or using a smaller area for the same mass production equipment, ultimately leading to increased production efficiency per unit area and cost savings. Attached Figure Description

[0039] Figure 1 A schematic perspective view of a laser transfer device provided in one embodiment of this application.

[0040] Figure 2 A schematic front view of a laser transfer apparatus provided in one embodiment of this application.

[0041] Figure 3 This is a schematic diagram of the structure of a surface treatment apparatus provided in one embodiment of this application.

[0042] Figure 4 This is a schematic diagram of the structure of a first transfer mechanism or a second transfer mechanism provided in one embodiment of this application.

[0043] Figure 5 This is a schematic diagram of the laser processing apparatus and adjustment structure provided in one embodiment of this application.

[0044] Explanation of reference numerals in the attached figures

[0045] 100. Laser transfer equipment; 110. Vertical conveying mechanism; 111. Bearing structure; 112. Rotating shaft; 113. Turntable mechanism; 120. Printing device; 130. Laser processing device; 131. Adjustment mechanism;

[0046] 140. Surface treatment device; 141. Spray head; 142. Scraper; 143. First driving component; 144. Second driving component;

[0047] 150. First transfer mechanism; 151. Support platform; 152. First drive mechanism; 153. Second drive mechanism; 154. Third drive mechanism; 155. Fourth drive mechanism;

[0048] 160. Second shooting component;

[0049] 200. Substrate;

[0050] 300, substrate conveying line; 310, second conveying line; 320, third conveying line; 330, second transfer mechanism;

[0051] A. Transfer station; B. Surface treatment station; C. Printing station; D. First shooting station; E. Second shooting station; F. Third shooting station; G. Fourth shooting station. Detailed Implementation

[0052] 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.

[0053] As a specific embodiment of this application, such as Figure 1 and Figure 2As shown, this embodiment provides a laser transfer printing device 100, which may include a vertical conveying mechanism 110, a printing device 120, and a laser processing device 130. The vertical conveying mechanism 110 may include at least one supporting structure 111, each supporting structure 111 for carrying a transfer substrate and conveying the transfer substrate in a vertical plane. The vertical conveying mechanism 110 has a printing station C and a transfer station A along the conveying direction. The transfer substrate includes a front surface with one planar surface and a back surface with the other surface being translucent. The printing device 120 is disposed at the printing station C for printing paste on the front surface of the transfer substrate. The laser processing device 130 is disposed at the transfer station A for irradiating the back surface of the transfer substrate and transferring the paste on the transfer substrate to the substrate 200 when the substrate 200 and the transfer substrate are conveyed to the transfer station A.

[0054] Specifically, the laser transfer printing equipment 100 in this embodiment may include a vertical conveying mechanism 110, a printing device 120, and a laser processing device 130. Since the vertical conveying mechanism 110 conveys the transfer substrate in the vertical direction, the relative positions of the printing device 120 and the laser processing device 130 are also in the vertical direction. This can reduce the area occupied by the entire laser transfer printing equipment 100, allowing more equipment to be stored per unit area, or using a smaller area for the same mass production equipment, ultimately leading to increased production efficiency per unit area and cost savings.

[0055] In this embodiment, the front side of the transfer substrate is flat. The paste is directly printed onto the front side of the transfer substrate by the printing device 120, and then transferred to the substrate 200 by the laser processing device 130. Because the transfer substrate is flat, the paste on the transfer substrate is less likely to remain after transfer, making cleaning convenient and facilitating recycling.

[0056] In this embodiment, the transfer substrate can be a glass substrate, with the front side capable of printing the paste and the back side transparent. To ensure a high aspect ratio of the paste printed on the front side of the glass substrate, the front side can be treated to guarantee a water droplet angle greater than 100°. Specific treatment methods include preparing an exceptionally 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.

[0057] As a specific embodiment of this application, the vertical conveying mechanism 110 of this embodiment may include a rotating shaft 112 and a turntable mechanism 113. The rotating shaft 112 may extend horizontally. At least one bearing structure 111 is provided on the radially outer side of the turntable mechanism 113 to bear the transfer substrate. The turntable mechanism 113 is rotatably connected to the rotating shaft 112, so that the turntable mechanism 113 is controlled to rotate along a vertical plane about the rotating shaft 112 as its axis, thereby causing the transfer substrate to rotate along the vertical plane.

[0058] The vertical conveying mechanism 110 in this embodiment operates on a principle similar to a Ferris wheel. When the transfer substrate is positioned on the support structure 111 of the turntable mechanism 113, its front side faces outward. In this embodiment, the turntable mechanism 113 rotates vertically around the rotation axis 112, such that when the transfer substrate rotates to opposite positions on both sides of the rotation axis 112, the front sides of the transfer substrate face opposite directions. Since the printing device 120 and the laser processing device 130 in this embodiment require the transfer substrate to be flipped, the vertical conveying mechanism 110 eliminates the need for an additional flipping mechanism, simplifying the structure of the entire laser transfer equipment 100 and reducing costs.

[0059] In this embodiment, the turntable mechanism 113 can be equipped with multiple (e.g., 4, 6, or 8) support structures 111. Each support structure 111 can support one transfer substrate. In this embodiment, when the transfer substrate is placed on the support structure 111, the front of the transfer substrate faces outward. When the turntable mechanism 113 rotates around the rotation axis 112, the support structures 111 cause the transfer substrate to circulate between the printing station C and the transfer station A.

[0060] In this embodiment, printing station C is located above the turntable mechanism 113, and the printing device 120 prints paste onto the transfer substrate at transfer station A from above. Transfer station A is located below the turntable mechanism 113. A laser processing device 130 is provided above transfer station A so that the laser processing device 130 emits a laser downwards to strike the back surface of the transfer substrate below, thereby transferring the paste from the transfer substrate to the substrate 200.

[0061] In this embodiment, the laser processing device 130 is located within the turntable mechanism 113. Furthermore, the laser processing device 130 is movable relative to the rotation axis 112 to adjust its position.

[0062] As a specific embodiment of this application, such as Figure 3 As shown, this embodiment also includes a surface treatment station B downstream of the transfer station A. The laser transfer equipment 100 further includes a surface treatment device 140, which is disposed at the surface treatment station B to process the transfer substrate at the surface treatment station B when the transfer substrate requires surface treatment.

[0063] In this embodiment, the surface treatment station B is located between the printing station C and the transfer station A, and downstream of the printing station C. This ensures that the transfer substrate is treated at the surface treatment station B after transfer before reaching the printing station C, keeping the transfer substrate clean during printing.

[0064] As a specific embodiment of this application, the surface treatment apparatus 140 may include a nozzle 141 and / or a scraper 142. The nozzle 141 is disposed at surface treatment station B and is used to spray cleaning liquid or gas onto the transfer substrate. The scraper 142 is disposed at surface treatment station B and is used to scrape off residual slurry on the transfer substrate.

[0065] The residual slurry on the transfer substrate is cleaned with a cleaning solution, while the scraper 142 directly scrapes off the slurry on the transfer substrate. When both are used simultaneously, the cleaning solution is first sprayed onto the front of the transfer substrate through the nozzle 141, and then the scraper 142 is used to scrape it off. This allows for faster removal of the slurry from the transfer substrate 200.

[0066] Of course, in other embodiments, the slurry can also be removed by laser.

[0067] As a specific embodiment of this application, the vertical conveying mechanism 110 of this embodiment also has a first shooting station D, which is located between the surface treatment station B and the transfer station A. A first shooting component is also provided at the first shooting station D, which is used to shoot the transfer substrate after the transfer is completed and to determine whether the paste of the transfer substrate can be transferred again.

[0068] Specifically, in this embodiment, the first imaging component at the first imaging station D can image the slurry on the transfer substrate. This first imaging station D can coincide with the transfer station A. After the transfer substrate completes its transfer at transfer station A, the first imaging component directly images the slurry on the transfer substrate. When the slurry can still be transferred again, only the substrate 200 already containing slurry is transported away, followed by a clean substrate 200. The slurry on the transfer substrate is then used again to transfer the next substrate 200. This process is repeated until no more slurry needs to be transferred, or the slurry on the transfer substrate can no longer be transferred, at which point the transfer substrate is output from transfer station A.

[0069] In another embodiment, the first imaging station D can be located downstream of the transfer station A. After the transfer substrate is completed, the vertical conveying mechanism 110 transports the transfer substrate to the first imaging station D. When the slurry at the transfer substrate can still be transferred again, the transfer substrate is transported to the transfer station A for transfer. This action is repeated until it can no longer be transferred.

[0070] Of course, after the first imaging component images the transfer substrate, it can determine whether there is any slurry remaining on the transfer substrate, and whether there is any slurry residue on the transfer substrate. When there is slurry residue on the transfer substrate, the vertical conveying mechanism 110 is used to transport the transfer substrate to the surface treatment station B, and the surface treatment device 140 is used to treat the slurry on the transfer substrate.

[0071] The first imaging component in this embodiment may be one or more cameras to capture images of the transfer substrate in real time.

[0072] As another specific embodiment of this application, the vertical conveying mechanism 110 of this embodiment also has a second shooting station E, which is located between the printing station C and the transfer station A. In the rotation direction of the vertical conveying mechanism 110, the second shooting station E is located downstream of the printing station C. A second shooting component 160 is provided at the second shooting station E. The second shooting component 160 is used to shoot the quality of the paste printed on the front side of the transfer substrate.

[0073] The second shooting station E is located downstream of the printing station C, and can determine whether the printing quality of the paste on the transfer substrate by the printing device 120 meets the requirements. When it meets the requirements, the transfer substrate can be conveyed by the vertical conveyor mechanism 110 to the next station (which can be another shooting station or transfer station A). When the printing quality of the transfer substrate does not meet the requirements, it can be directly conveyed to the surface treatment station B for treatment and then reprinted, or it can be directly rejected and cleaned before loading.

[0074] In the laser transfer process, the quality of the paste on the transfer substrate is strongly correlated with the quality of the paste finally transferred to the substrate 200. Its state directly determines the accuracy and performance of subsequent gate line fabrication, thus becoming a core node in process quality control. This embodiment achieves precise control of paste quality by adding a pre-inspection step for the transfer substrate paste, ensuring the fabrication quality of the gate lines on the substrate 200 from the source.

[0075] Compared to the traditional process where inspection is only performed after grid line formation, this embodiment inspects the quality of the paste at the transfer substrate before the transfer process. This avoids rework of the substrate due to defects in the transfer substrate paste, reducing the loss of valuable materials such as silver paste. Furthermore, by ensuring the stability of the grid line's aspect ratio and the consistency of its conductivity, it lays the foundation for the reliability of end products such as photovoltaic cells and semiconductor devices.

[0076] As a specific embodiment of this application, the laser transfer printing equipment 100 of this embodiment may further include a first conveyor line (not shown in the figure) and at least one first transfer mechanism 150. The first conveyor line is used to convey the unprinted transfer substrate. At least one first transfer mechanism 150 is disposed between the first conveyor line and the vertical conveyor mechanism 110, and is used to convey the transfer substrate on the first conveyor line to the printing station C of the vertical conveyor mechanism 110.

[0077] Specifically, in this embodiment, after the transfer substrate is conveyed to the vertical conveyor mechanism 110, it may be rejected if the printing quality is poor or the cleaning is incomplete. Therefore, it is necessary to replenish the transfer substrate to the vertical conveyor mechanism 110 to improve the overall production efficiency of the equipment. The first conveyor line in this embodiment is used to convey clean transfer substrates. When the transfer substrate is conveyed to the vicinity of the vertical conveyor mechanism 110, the first transfer mechanism 150 transfers the substrate to the printing station C of the vertical conveyor line.

[0078] In this embodiment, there can be one first transfer mechanism 150, which transfers the transfer substrate on the first conveyor line to the vertical conveyor line and then returns to transfer the next transfer substrate.

[0079] Preferably, the number of first transfer mechanisms 150 in this embodiment can be two or more, which can alternately transport and transfer substrates, thereby improving the overall production efficiency.

[0080] As a specific embodiment of this application, the laser transfer printing equipment 100 of this embodiment may further include a substrate transport line 300. The substrate transport line 300 may include a second transport line 310, a third transport line 320, and at least one second transfer mechanism 330. The second transport line 310 is located in front of transfer station A to transport the unprinted substrate 200 to the front of transfer station A. The third transport line 320 is located behind transfer station A to transport the transferred substrate 200 out from the rear of transfer station A. Each transfer mechanism reciprocates between the rear end of the second transport line 310 and the front end of the third transport line 320 to transfer the substrate 200 from the second transport line 310 to transfer station A for paste transfer, and then transports the transferred substrate 200 to the third transport line 320, adjusting the position of the substrate 200 according to the paste position.

[0081] Specifically, the substrate transport line 300 in this embodiment is mainly used for transporting the substrate 200 and conveying it to the transfer station A. This transport line innovatively adopts a segmented design, consisting of a second transport line 310, a third transport line 320, and a second transfer mechanism 330. The second transfer mechanism 330 can move flexibly between the two transport lines and can precisely adjust the position of the substrate 200, significantly improving the flexibility and adaptability of the overall transport system.

[0082] This segmented structural design breaks through the layout limitations of traditional integrated conveyor lines. Through the dynamic scheduling capability of the transfer mechanism, it can not only ensure the smooth transition of the substrate 200 in different conveyor sections, but also flexibly adjust the posture of the substrate 200 according to the actual working conditions, providing a more accurate positioning basis for subsequent transfer processes, and effectively improving the overall production line's operating efficiency and process adaptability.

[0083] As a specific embodiment of this application, such as Figure 4 As shown, each first transfer mechanism 150 and each second transfer mechanism 330 in 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. At least one support platform 151 is used to support the substrate 200 and the transfer substrate. The first drive mechanism 152 is connected to the support platform 151 to drive the support platform 151 to rotate. The 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 direction of the vertical conveying line in the horizontal plane. The third drive mechanism 154 is connected to the second drive mechanism 153 to drive the second drive mechanism 153, the third drive mechanism 154, and the support platform 151 to move in the vertical direction. The 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 conveyor line and the printing station C and between the second conveyor line 310 and the transfer station A, respectively.

[0084] 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.

[0085] As a specific embodiment of this application, the vertical conveying mechanism 110 of this embodiment further includes an adjustment mechanism 131, which is connected to the laser processing device 130 and is used to adjust the position of the laser processing device 130 according to the position of the printing paste and the position of the transfer substrate.

[0086] The laser processing device 130 in this embodiment is equipped with an adjustment mechanism 131. During the process of transferring the paste on the transfer substrate to the substrate 200 using laser transfer technology, bidirectional position control between the substrate 200 and the laser processing device 130 can be achieved, providing a core guarantee for the accuracy and stability of the transfer process.

[0087] From a technical perspective, the core of laser transfer is to apply laser pulses to the slurry, causing it to heat up and form droplets or vaporize, which are then precisely deposited on the surface of the substrate 200. This process requires extremely high precision in the relative alignment between the laser focal point and the substrate 200. The adjustment mechanism 131 in this solution can perform multi-dimensional positional calibration of the substrate 200, ensuring that the area to be processed is precisely aligned with the laser path. It can also correct the direction and landing point deviation of the laser beam by adjusting the spatial orientation of the laser processing device 130 (e.g., through the coordinated control of the reflector assembly and piezoelectric screws), enabling the laser energy to precisely act on the target slurry area on the transfer substrate. This bidirectional adjustment mechanism effectively solves the problem of traditional single-adjustment methods being susceptible to equipment vibration and thermal deformation, significantly improving the beam positioning stability and substrate 200 alignment accuracy.

[0088] In practical applications, this design can be flexibly adapted to different slurry characteristics (such as viscosity differences) and substrate 200 specifications. By optimizing the relative position of the laser and the substrate 200, it can ensure that the slurry fully absorbs laser energy to form uniform droplets or uniform vaporization, while avoiding damage to the transfer substrate or carbonization of the slurry caused by excessive energy concentration. Ultimately, it achieves a highly efficient and stable transfer effect, laying a high-quality foundation for subsequent processes.

[0089] As a specific embodiment of this application, the laser transfer equipment 100 of this embodiment is further provided with a third shooting station F between the surface treatment station B and the printing station C, and a third shooting component (not shown in the figure) is provided at the third shooting station F to shoot whether the transfer substrate is clean. If it is clean, it is then transported to the printing station C. If it is not clean, it needs to be processed again.

[0090] As a specific embodiment of this application, this embodiment also includes a fourth imaging station G between the second imaging station E and the transfer station A, where a fourth imaging component is provided. When the quality of the slurry at the transfer substrate meets the requirements, the transfer substrate is transported to the fourth imaging station G, where the position of the slurry is captured by the fourth imaging component, providing support for subsequent adjustments to the position of the laser processing device 130 and / or the substrate 200.

[0091] In this embodiment, the fourth shooting station G and the second shooting station E can share the same station, and the fourth shooting component and the second shooting component 160 can also share the same shooting component.

[0092] Specifically, the structure and operating principle of the entire laser transfer equipment 100 in this embodiment are as follows:

[0093] The laser transfer printing equipment 100 may include a first conveyor line for transporting the transfer substrate, a first transfer mechanism 150, and a vertical conveyor mechanism 110. The first conveyor line transports the clean transfer substrate to the first transfer mechanism 150, which then transfers the substrate from the first conveyor line to the printing station C of the vertical conveyor mechanism 110. The printing device 120 prints paste on the front side of the transfer substrate. After completion, the vertical conveyor mechanism 110 transfers the transfer substrate to the second imaging station E, where the second imaging component 160 images the paste on the transfer substrate to check if the quality meets the requirements. If the quality does not meet the requirements, the substrate is reprinted or rejected. When the quality meets the requirements, the vertical conveyor mechanism 110 transfers the substrate to the fourth imaging station G, where the fourth imaging component images the position of the paste. The vertical conveyor mechanism G continues to transport the substrate. Upon reaching the transfer station A, the laser processing device 130 is activated to transfer the paste from the transfer substrate to the substrate 200. After one ink transfer is completed, the first imaging component detects the ink on the transfer substrate to determine if it is still suitable for the next transfer. If so, the next transfer continues at the transfer station. If not, it checks for any residual ink on the transfer substrate. If no residual ink remains, the vertical conveyor 110 directly transfers the transfer substrate to the printing station C. If residual ink remains, the vertical conveyor 110 transports the transfer substrate to the surface treatment station B, where the surface treatment device 140 treats the surface of the transfer substrate. After treatment, the third imaging component checks again to ensure the transfer substrate is clean. If not, the treatment is repeated or the substrate is rejected. Once clean, the substrate is transported to the printing station C for ink printing.

[0094] Specifically, the laser transfer equipment 100 in this embodiment further includes a substrate transport line 300, which may include a second transport line 310, a third transport line 320, and a second transfer mechanism 330. The second transport line 310 transports the substrate 200 to the vicinity of the transfer station A, and the second transfer mechanism 330 transports the substrate 200 to the transfer station and adjusts the position of the substrate 200. After the transfer is completed, the substrate 200 is transported to the third transport line 320, and the third transport line 320 outputs the substrate 200. The mechanisms for transporting the transfer substrate and transporting the substrate 200 cooperate with each other so that when the paste is transferred at the transfer station A, both the transfer substrate and the substrate 200 are transported to the transfer station A, thereby completing the paste transfer.

[0095] As a specific embodiment of this application, this embodiment provides a photovoltaic cell production line, which may include the laser transfer equipment 100 described above.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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: A vertical conveying mechanism includes at least one supporting structure, each of which carries a transfer substrate and drives the transfer substrate to be conveyed in a vertical plane; the vertical conveying mechanism has a printing station and a transfer station along the conveying direction; wherein the transfer substrate includes a front surface with one side being a flat surface and a back surface with the other side being a light-transmitting surface; A printing apparatus, disposed at the printing station, is used to print paste onto the front side of the transfer substrate; and A laser processing device is provided at the transfer station for irradiating the back side of the transfer substrate and transferring the paste on the transfer substrate to the substrate when the substrate and the transfer substrate are transported to the transfer station.

2. The laser transfer equipment according to claim 1, characterized in that, The vertical conveying mechanism includes: A rotating shaft that extends horizontally; A turntable mechanism has at least one of the aforementioned support structures arranged on its radially outer side to support the transfer base; the turntable mechanism is rotatably connected to the rotation shaft so that the turntable mechanism is controlled to rotate along a vertical plane about the rotation shaft as an axis, thereby driving the transfer base to rotate along the vertical plane.

3. The laser transfer equipment according to claim 2, characterized in that, The transfer station is located below the turntable mechanism; The laser processing device is arranged above the transfer station so that the laser processing device emits a laser downward to hit the back of the transfer substrate below, thereby transferring the slurry on the transfer substrate to the substrate.

4. The laser transfer equipment according to claim 1, characterized in that, Downstream of the transfer station is a surface treatment station; The laser transfer equipment also includes a surface treatment device, which is located at the surface treatment station to process the transfer substrate at the surface treatment station when the transfer substrate requires surface treatment.

5. The laser transfer equipment according to claim 4, characterized in that, The surface treatment apparatus includes: A nozzle, disposed at the surface treatment station, is used to spray cleaning liquid or gas onto the transfer substrate; and / or A scraper, located at the surface treatment station, is used to scrape off any residual slurry on the transfer substrate.

6. The laser transfer equipment according to claim 4, characterized in that, The vertical conveying mechanism also has a first shooting station, which is located between the surface treatment station and the transfer station; A first imaging component is also provided at the first imaging station. The first imaging component is used to photograph 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.

7. The laser transfer equipment according to claim 1, characterized in that, The vertical conveying mechanism also has a second shooting station, which is located between the printing station and the transfer station. In the rotation direction of the vertical conveying mechanism, the second shooting station is located downstream of the printing station. A second shooting component is provided at the second shooting station, which is used to capture the quality of the paste printed on the front side of the transfer substrate.

8. The laser transfer equipment according to claim 1, characterized in that, Also includes: A first conveyor line is used to convey the unprinted transfer substrate; At least one first transfer mechanism is disposed between the first conveyor line and the conveying mechanism for transferring the transfer substrate on the first conveyor line to the printing station of the conveying mechanism.

9. The laser transfer equipment according to claim 8, characterized in that, It also includes a substrate transport line, the substrate transport line comprising: A second conveyor line is located in front of the transfer station to transport the unprinted substrate to the front of the transfer station. The third conveyor line is located behind the transfer station to convey the substrate that has been transferred out from the rear of the transfer station. At least one second transfer mechanism, each of which reciprocates between the rear end of the second conveyor line and the front end of the transfer station to transfer the substrate from the second conveyor line to the transfer station for transfer, and then transports the substrate after transfer to the third conveyor line, and adjusts the position of the substrate according to the position of the slurry.

10. The laser transfer equipment according to claim 9, characterized in that, Each of the first transfer mechanism and the second transfer mechanism includes: At least one 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 conveyor line and the printing station, and between the second conveyor line and the transfer station.

11. The laser transfer equipment according to claim 10, characterized in that, The vertical conveying mechanism is a vertical circulating conveying mechanism. After the transfer substrate is transferred at the transfer station, when there is no residue on the transfer substrate, the conveying mechanism conveys the transfer substrate to the printing station. When the transfer substrate is transferred at the transfer station and there is residue on the transfer substrate, the conveying mechanism conveys the transfer substrate to the surface treatment station for treatment, and then conveys it to the printing station for printing.

12. A photovoltaic cell production line, characterized in that, The laser transfer device includes any one of claims 1-10.

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