Laser transfer printing system

Abstract

The utility model discloses a laser transfer printing system. The laser transfer printing system can comprise a conveying mechanism, a rotating disc, a transfer printing laser transmitter, a laser cleaning mechanism and a filling mechanism, the transfer printing laser transmitter, the laser cleaning mechanism and the filling mechanism are arranged around the rotating disc, the transfer printing laser transmitter is located above the conveying mechanism, and the vertical projection of the transfer printing laser transmitter on the conveying mechanism covers part of the area of the conveying mechanism; the turntable is used for bearing the glass carrier plate, driving the glass carrier plate to rotate and controlling the glass carrier plate to stay at the transfer printing station, the cleaning station and the filling station; the transfer printing laser transmitter is used for printing the slurry filled with the glass support plate onto the solar cell conveyed by the conveying mechanism in a laser transfer printing manner; the laser cleaning mechanism is used for cleaning residual slurry on the glass support plate in a laser manner; and the filling mechanism is used for filling the glass support plate on the filling station with slurry. According to the system, the height consistency of the grid line electrode obtained through laser transfer printing can be effectively improved, and the laser transfer printing efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a laser transfer system. Background Art

[0002] In the solar cell preparation process, laser transfer printing (abbreviated as laser transfer) technology can be used to print fine grid lines for solar cells. At present, in the process of printing fine grid lines by laser transfer printing, a transparent flexible polymer film is used as a carrier of the slurry. The transparent flexible polymer film is irradiated with a laser to make the slurry fall off the carrier, and the slurry is transferred to the solar cell to form a grid line electrode.

[0003] Due to the flexibility of the transparent flexible polymer film and its susceptibility to laser irradiation, the height consistency of the gate electrode printed by the existing laser transfer printing is poor. In addition, the transparent flexible polymer film is prone to residual slurry, which will further reduce the height consistency of the printed gate electrode. Utility Model Content

[0004] In view of this, the utility model provides a laser transfer system, which can effectively improve the height consistency of the laser-transferred gate line electrode and the laser transfer efficiency by selecting a glass carrier as a carrier of the slurry and adding a device for cleaning the glass carrier.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model provides a laser transfer system, comprising: a transmission mechanism, a turntable, a transfer laser emitter arranged around the turntable, a laser cleaning mechanism and a filling mechanism, wherein:

[0007] The transfer laser emitter is located above the conveying mechanism, and the vertical projection of the transfer laser emitter on the conveying mechanism covers a partial area of ​​the conveying mechanism;

[0008] The turntable is used to carry the glass carrier, drive the glass carrier to rotate, and control the glass carrier to stay at the transfer station corresponding to the transfer laser emitter, the cleaning station corresponding to the laser cleaning mechanism, and the filling station corresponding to the filling mechanism; wherein the glass carrier is provided with a groove on one side facing the conveying mechanism, and the groove is used to fill the slurry;

[0009] The transfer laser emitter is used to print the slurry filled in the glass carrier onto the solar cell conveyed by the conveying mechanism by laser transfer;

[0010] The laser cleaning mechanism uses laser to clean the residual slurry on the glass carrier;

[0011] The filling mechanism is used to fill the glass carrier plate located at the filling station with slurry.

[0012] The technical solution of the first aspect of the above utility model has the following advantages or beneficial effects:

[0013] The laser transfer system provided by the embodiment of the utility model utilizes a glass carrier plate filled with slurry, and prints the slurry filled with the glass carrier plate onto a solar cell through a transfer laser emitter. Compared with the existing polymer flexible carrier, the grooves on the glass carrier plate have better consistency, and the grooves of the glass carrier plate installed on the turntable can also maintain consistency. Therefore, the slurry filled with the glass carrier plate is transferred to the solar cell through laser, so that the printed grid line electrode can maintain relatively good consistency. Furthermore, because the turntable drives the glass carrier plate it carries to circulate through the laser cleaning mechanism to clean the residual slurry, the filling mechanism fills the slurry, and the transfer laser emitter transfers the filling to the solar cell, the laser transfer system can keep the glass carrier plate clean while working continuously and uninterruptedly, and avoid residual slurry affecting the consistency of the printed grid line electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of a partial structure of a laser transfer system according to an embodiment of the utility model;

[0015] Figure 2 is a bottom view of a partial structure of a laser transfer system according to an embodiment of the utility model;

[0016] Figure 3 is a top view of a partial structure of a laser transfer system according to an embodiment of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the relative position relationship between the filling mechanism and the glass carrier according to an embodiment of the utility model;

[0018] Figure 5 It is a partial structural schematic diagram of a packing mechanism according to an embodiment of the utility model;

[0019] Figure 6 It is a schematic diagram of the relative relationship between the glass carrier plate and the frame of the turntable according to an embodiment of the utility model;

[0020] Figure 7 is a partial structural schematic diagram of a glass carrier according to an embodiment of the utility model;

[0021] Figure 8 It is a schematic diagram of the main process of the laser transfer method according to an embodiment of the utility model.

[0022] The reference numerals are as follows:

[0023] 10-transport mechanism; 20-turntable; 21-frame; 30-transfer laser emitter; 40-laser cleaning mechanism; 41-first laser cleaning emitter; 42-second laser cleaning emitter; 50-filling mechanism; 51-filling auxiliary plate; 52-transmission device; 53-vacuum device; 60-glass carrier; 61-groove; 70-positioning adsorption mechanism; 71-imaging device; 72-adsorption device. DETAILED DESCRIPTION

[0024] The laser transfer system involved in the embodiment of the utility model is mainly used in the field of solar cell and photovoltaic module production, and is mainly aimed at the process of printing grid line electrodes of solar cells.

[0025] Among them, laser transfer is actually laser transfer printing, which fills the slurry required to form the grid electrode on a transparent carrier with specially designed grooves, and scans the transparent carrier with a high-power laser beam to transfer the slurry from the groove to the surface of the solar cell. During the transfer process, the slurry maintains a shape that matches the groove and is printed on the surface of the solar cell. Compared with the traditional screen printing technology of solar cells, the grid electrode formed by laser transfer can 1) significantly reduce the shading area of ​​the grid electrode, thereby improving the photoelectric conversion efficiency of the solar cell; 2) significantly reduce the amount of slurry used; 3) the laser transfer is a non-contact grid electrode, which can effectively reduce or even avoid the fragmentation rate of the solar cell in the process of printing the grid electrode.

[0026] At present, the disclosed laser transfer system generally uses a flexible polymer film as the carrier substrate of the slurry. During the laser transfer process, the formed gate electrode can maintain a high degree of consistency by controlling the consistent tension of the flexible polymer film. On the one hand, since the flexible polymer film is easy to deform, the gate electrode prepared using the flexible polymer film as the carrier substrate of the slurry has poor height consistency; on the other hand, the flexible polymer film is easy to deform. After long-term use, material fatigue leads to reduced laser transfer accuracy, low reuse rate, and high cost of the current solution of laser transfer printing of gate electrodes.

[0027] In order to overcome the above-mentioned problems of using flexible polymer film as the bearing substrate of slurry in the existing laser transfer system, glass is currently used as the substrate to replace the flexible polymer film. However, through research, it is found that in the laser transfer process, using glass as the substrate to bear filler will cause the problem of residual slurry on the glass. The residual slurry on the glass accumulates for a long time, which makes the slurry transfer difficult, and the formed grid electrode is severely deformed. Frequent disassembly and cleaning of the glass substrate will affect the production efficiency of solar cells. Therefore, there is an urgent need for a laser transfer system that can realize automated production, which can ensure the consistency of the produced grid electrode while effectively improving the production efficiency.

[0028] It is worth noting that the laser transfer system involved in the embodiment of the utility model generally selects a glass carrier to carry the filler. In addition, the laser transfer system provided by the embodiment of the utility model can also use other non-deformable carriers that can achieve the same effect as the glass carrier.

[0029] Among them, the pattern of the grooves arranged on the glass carrier (such as the spacing between the grooves, the depth of the grooves, the cross-sectional structure of the grooves), etc., can be set according to the requirements of the solar cell for the gate electrode (such as the gate electrode spacing, the gate electrode size, the gate electrode shape), and the embodiment of the utility model does not limit the pattern of the grooves arranged on the glass carrier.

[0030] The embodiment of the utility model improves the laser transfer system and improves the printing process of the grid line electrode of the solar cell based on the laser transfer system, so that the entire laser transfer system can clean the slurry remaining on the glass carrier to improve the consistency of the laser transferred grid line electrode, and can effectively improve the production efficiency of the solar cell and reduce the fragmentation rate of the solar cell.

[0031] in, Figures 1 to 3 The front view, bottom view and top view respectively show a partial structure of the laser transfer system provided by the embodiment of the utility model; Figure 4 A structural schematic diagram showing the relative position relationship between the filler mechanism and the glass carrier provided by the embodiment of the utility model; Figure 5 A partial structural schematic diagram of a packing mechanism provided by an embodiment of the utility model is shown; Figure 6 A schematic diagram showing the relative relationship between the glass carrier plate and the frame of the turntable in an embodiment of the utility model; Figure 7 A partial structural schematic diagram of a glass carrier plate according to an embodiment of the utility model is shown.

[0032] like Figures 1 to 3As shown, the embodiment of the utility model provides a laser transfer system. The laser transfer system may include: a conveying mechanism 10, a turntable 20, a transfer laser emitter 30 arranged around the turntable 20, a laser cleaning mechanism 40 and a filling mechanism 50, wherein:

[0033] The transfer laser emitter 30 is located above the conveying mechanism 10 , and the vertical projection of the transfer laser emitter 30 on the conveying mechanism 10 covers a partial area of ​​the conveying mechanism 10 ;

[0034] The turntable 20 is used to carry the glass carrier 60, drive the glass carrier 60 to rotate, and control the glass carrier 60 to stay at the transfer station corresponding to the transfer laser emitter 30, the cleaning station corresponding to the laser cleaning mechanism 40, and the filling station corresponding to the filling mechanism 50; wherein, the glass carrier 60 is provided with a groove 61 on one side facing the conveying mechanism 10, and the groove 61 is used to fill the slurry;

[0035] The transfer laser emitter 30 is used to print the slurry filled in the glass carrier 60 onto the solar cell conveyed by the conveying mechanism 10 by laser transfer;

[0036] The laser cleaning mechanism 40 uses laser to clean the residual slurry on the glass carrier 60;

[0037] The filling mechanism 50 is used to fill the glass carrier 60 at the filling station with slurry.

[0038] Specifically, Figures 1 to 3 As shown, the conveying mechanism 10 generally includes two parallel conveyor belts. The running speed and running direction of the two conveyor belts are the same. The two ends of the solar cell are respectively carried on the two conveyor belts.

[0039] With respect to the filling mechanism 50 in the laser transfer system provided in the embodiment of the utility model, the slurry filled by the filling mechanism 50 only exists in the groove 61, so as to effectively control the size of the formed gate line electrode.

[0040] In addition, each structure in the laser transfer system provided by the embodiment of the utility model forms a cooperative structure with the glass carrier 60, so as to realize the transfer grid line electrode of the solar cell. Specifically, with respect to the cooperative structure, the turntable 20 provided by the embodiment of the utility model can have multiple mounting positions for mounting the glass carrier 60, so that the turntable 20 can carry multiple glass carriers 60 at the same time. In a preferred embodiment, the number of glass carriers 60 carried by the turntable 20 is consistent with the sum of the number of stations of the filling station, the transfer station, the first cleaning station and the second cleaning station. For example, in the direction of rotation of the turntable, according to the workflow of the laser transfer system, the first filling station-the first transfer station-the first first cleaning station-the first second cleaning station-the second filling station-the second transfer station-the second first cleaning station-the second second cleaning station-the first filling station are arranged in the circumferential direction, that is, a total of 8 stations are arranged in the direction of rotation of the turntable (respectively: 2 filling stations, 2 transfer stations, 2 first cleaning stations and 2 second cleaning stations), and the number of glass carriers 60 carried by the turntable 20 is also 8. Then, in the direction of rotation of the turntable, according to the workflow of the laser transfer system, three stations (filling station, transfer station and cleaning station) are arranged in the circumferential direction, and accordingly, the number of glass carriers 60 carried by the turntable 20 is also 3. More preferably, in the direction of rotation of the turntable, according to the workflow of the laser transfer system, four stations (filling station, transfer station, first cleaning station and second cleaning station) are arranged circumferentially, and accordingly, the number of glass carriers 60 carried by the turntable 20 is also 4. Among them, in the case where the number of glass carriers 60 carried by the turntable 20 is consistent with the sum of the number of stations of the filling station, the transfer station, the first cleaning station and the second cleaning station, when any glass carrier 60 is located at any station, the remaining glass carriers 60 correspond to the remaining stations one by one. For example, in the case where the turntable 20 carries three glass carriers 60 at the same time, when any glass carrier 60 is located at the transfer station corresponding to the transfer laser emitter 30, the remaining two glass carriers 60 are respectively located at the cleaning station corresponding to the laser cleaning mechanism 40 and the filling station corresponding to the filling mechanism 50. In the case where the laser cleaning mechanism 40 includes the first laser cleaning emitter 41 and the second laser cleaning emitter 42, the turntable 20 carries four glass carriers 60 at the same time. When any glass carrier 60 is located at the transfer station corresponding to the transfer laser emitter 30, the remaining three glass carriers 60 are respectively located at the first cleaning station corresponding to the first laser cleaning emitter 41, the second cleaning station corresponding to the second laser cleaning emitter 42, and the filling station corresponding to the filling mechanism 50. In other words, the distribution of the three or four glass carriers 60 carried by the turntable 20 at the same time is related to the distribution of the transfer station, the cleaning station, and the filling station.By carrying three or four or even more glass carriers 60 at the same time on the turntable 20 , the three or four or even more glass carriers 60 can be made to work alternately in a cycle, so as to effectively improve the laser transfer efficiency. Figures 1 to 3 The structure in which the turntable 20 carries four glass carriers 60 is exemplified.

[0041] Furthermore, in order to facilitate the control of the plurality of glass carriers 60 carried by the turntable 20 corresponding to each station, each station is evenly distributed in the rotation direction of the turntable 20. Accordingly, the filling mechanism 50, the transfer laser emitter 30 and the laser cleaning mechanism 40 corresponding to each station are also evenly distributed in the rotation direction of the turntable 20.

[0042] Specifically, in the rotation direction of the turntable 20, the filling station corresponding to the filling mechanism 50, the transfer station corresponding to the transfer laser emitter 30, and the cleaning station corresponding to the laser cleaning mechanism 40 are arranged in circumferential order. That is, when the turntable 20 rotates, the glass carrier 60 carried by it is driven to move from the filling station to the transfer station, from the transfer station to the cleaning station, and from the cleaning station to the filling station. That is, when the laser transfer system is in working state, the glass carrier 60 is controlled to sequentially and cyclically pass through the filling station, the transfer station, and the cleaning station. Correspondingly, the filling mechanism 50, the transfer laser emitter 30 and the laser cleaning mechanism 40 are arranged and distributed according to the filling station, the transfer station and the cleaning station: that is, in the rotation direction of the turntable 20 (the turntable 20 can rotate clockwise or counterclockwise), the glass carrier 60 first reaches the filling station of the filling mechanism 50, then reaches the transfer station of the transfer laser emitter 30 and the cleaning station corresponding to the laser cleaning mechanism 40, and returns to the filling station of the filling mechanism 50 from the cleaning station corresponding to the laser cleaning mechanism 40 to start a new round of cycle.

[0043] It is worth noting that the rotation direction of the turntable 20 is generally clockwise or counterclockwise on the same plane. If the turntable 20 rotates clockwise, the filling station, transfer station and cleaning station are distributed in the clockwise direction. If the turntable 20 rotates counterclockwise, the filling station, transfer station and cleaning station are distributed in the counterclockwise direction. Figure 1 The distribution of the transfer laser emitter 30, the laser cleaning mechanism 40 and the filling mechanism 50 is shown as an example when the turntable 20 rotates in the counterclockwise direction N. Figures 1 to 3 As shown, the transfer laser emitter 30, the first laser cleaning emitter 41, the second laser cleaning emitter 42 and the filling mechanism 50 are evenly distributed in the rotation direction of the turntable 20. Through this structural design, multiple glass carriers 60 can be evenly distributed on the turntable 20, ensuring the smooth operation of the laser transfer system.

[0044] Specifically, for each glass carrier 60 carried on the turntable, the working process of the above-mentioned laser transfer system is as follows: the turntable 20 rotates the glass carrier 60 after the filling mechanism 50 fills the slurry to the transfer station, the transfer laser emitter 30 transfers the slurry filled in the groove 61 of the glass carrier 60 to the solar cell, and then the turntable 20 rotates the glass carrier 60 to the cleaning station, the laser cleaning mechanism 40 cleans the glass carrier 60, and the turntable 20 rotates the cleaned glass carrier 60 to the filling station again to perform a new round of filling-transfer-cleaning. It can be understood that in the case where the turntable 20 carries multiple glass carriers 60, different glass carriers 60 are located at different processing stations, and different glass carriers 60 are respectively in the filling stage, transfer stage and cleaning stage. The transfer laser emitter 30, the laser cleaning mechanism 40 and the filling mechanism 50 work synchronously and continuously, effectively improving the production efficiency of solar cells.

[0045] The slurry used in the laser transfer system provided in the embodiment of the utility model can be any slurry used in the prior art, such as low-temperature slurry, high-temperature slurry, etc. The slurry can contain metal materials required for electrodes such as silver, aluminum, nickel, titanium, copper, etc. In addition, the slurry can also include glass powder and modifiers, volatile solvents and non-volatile polymers or resins.

[0046] The laser parameters used by the transfer laser emitter 30 can be set according to user requirements. For example, the laser parameters can be a laser beam with a wavelength of 700-1200 nm and a power of 10-2000 W. For example, the wavelength of the laser beam can be 700 nm, 800 nm, 880 nm, 920 nm, 950 nm, 1000 nm, 1050 nm, 1100 nm, 1150 nm, 1200 nm, etc. The power can be 10 W, 20 W, 40 W, 60 W, 80 W, 100 W, 120 W, 150 W, 200 W, 240 W, 250 W, 400 W, 500 W, 750 W, 900 W, 1000 W, 1200 W, 1500 W, 1700 W, 1900 W, 2000 W, etc.

[0047] In summary, the laser transfer system provided in this embodiment utilizes a glass carrier plate filled with slurry, and prints the slurry filled with the glass carrier plate onto a solar cell through a transfer laser emitter. Compared with existing polymer flexible carriers, the grooves on the glass carrier plate have better consistency, and the grooves of the glass carrier plate installed on the turntable can also maintain consistency. Therefore, the slurry filled with the glass carrier plate is transferred to the solar cell through laser, which can maintain relatively good consistency of the printed grid line electrode. Furthermore, because the turntable drives the glass carrier plate it carries to circulate through the laser cleaning mechanism to clean the residual slurry, the filling mechanism fills the slurry, and the transfer laser emitter transfers the filler to the solar cell, the laser transfer system can keep the glass carrier plate clean while working continuously and uninterruptedly, and avoid residual slurry affecting the consistency of the printed grid line electrode.

[0048] In a preferred embodiment, Figures 1 to 3 As shown, the laser cleaning mechanism 40 may include: a first laser cleaning emitter 41 and a second laser cleaning emitter 42, wherein:

[0049] In the rotation direction of the turntable 20, the filling station corresponding to the filling mechanism 50, the transfer station corresponding to the transfer laser emitter 30, the first cleaning station corresponding to the first laser cleaning emitter 41, and the second cleaning station corresponding to the second laser cleaning emitter 42 are arranged in circumferential order; it can be understood that the filling mechanism 50 corresponds to the filling station in the up-down direction, the transfer laser emitter 30 corresponds to the transfer station in the up-down direction, the first laser cleaning emitter 41 corresponds to the first cleaning station in the up-down direction, and the second laser cleaning emitter 42 corresponds to the second cleaning station in the up-down direction;

[0050] The turntable 20 drives the glass carrier 60 to move from the filling station to the transfer station, from the transfer station to the first cleaning station, from the first cleaning station to the second cleaning station, and from the second cleaning station to the filling station, so as to sequentially perform filling, transfer, cleaning by the first laser cleaning emitter 41, and cleaning by the second laser cleaning emitter 42 on the glass carrier 60.

[0051] That is, after the slurry is transferred to the solar cell through the transfer laser emitter 30, the glass carrier 60 located on the transfer station is driven by the turntable 20 and passes through the first laser cleaning emitter 41 and the second laser cleaning emitter 42 in sequence. The glass carrier 60 is cleaned by laser twice to ensure that the slurry remaining on the glass carrier 60 can be completely removed, thereby ensuring the consistency of the gate line electrode subsequently transferred from the glass carrier 60.

[0052] In addition, the glass carrier 60 may be cleaned only once. Preferably, the glass carrier 60 is cleaned twice by the first laser cleaning emitter 41 and the second laser cleaning emitter 42 in sequence.

[0053] Wherein, in the case where the laser cleaning mechanism 40 includes two laser cleaning emitters, the laser energy used by the first laser cleaning emitter 41 to clean the glass carrier 60 is higher than the laser energy used by the second laser cleaning emitter 42 to clean the glass carrier 60;

[0054] The width of the laser emitted by the first laser cleaning emitter 41 for cleaning the glass carrier 60 is greater than the width of the laser emitted by the second laser cleaning emitter 42 for cleaning the glass carrier 60 .

[0055] Generally speaking, the first laser cleaning emitter 41 and the second laser cleaning emitter 42 both emit multiple laser beams at a time. The laser energy generally refers to the energy of a laser beam reaching the glass carrier 60. The laser width generally refers to the width of a laser beam acting on the glass carrier 60.

[0056] By means of the relationship between the laser energies of the first laser cleaning emitter 41 and the second laser cleaning emitter 42 (i.e., the laser energy of the first laser cleaning emitter 41 is higher than the laser energy of the second laser cleaning emitter 42) and the relationship between the laser widths (the laser width of the first laser cleaning emitter 41 is greater than the laser width of the second laser cleaning emitter 42), as well as the relationship between the laser energies and the laser widths, it is possible to ensure that the residual slurry is completely removed, and energy consumption is effectively controlled, thereby achieving the purpose of energy saving and controlling production costs.

[0057] Furthermore, the width of the laser emitted by the first laser cleaning emitter 41 is not less than the width of the groove 61. That is, the first laser cleaning emitter 41 performs a large-scale preliminary cleaning, and the groove 61 and the slurry remaining around the groove 61 can be cleaned as much as possible. Through research, it is found that after cleaning by the first laser cleaning emitter 41, even if there is a small amount of slurry in the area outside the groove 61, it will not affect the consistency of the gate line electrode subsequently transferred by laser.

[0058] In addition, the width of the laser emitted by the second laser cleaning emitter 42 is smaller than the width of the groove 61. Through this process, the inside of the groove 61 is further cleaned to completely remove the residual slurry in the groove 61, thereby improving the consistency of the gate line electrode subsequently transferred by laser.

[0059] The width of the laser groove 61 can be as follows: Figure 7 The width D of the groove 61 is indicated in the partial structure of the glass substrate 60 .

[0060] In addition, by cooperating with the first laser cleaning emitter 41 and the second laser cleaning emitter 42, the consistency of the gate line electrodes transferred by laser can still be ensured for the glass carrier 60 without special treatment (ie, the glass carrier 60 made of ordinary glass).

[0061] It is worth noting that after the first laser cleaning emitter 41 and the second laser cleaning emitter 42 cooperate to clean the glass carrier 60, after a long period of cyclic use, the glass carrier 60 will not be etched by the first laser cleaning emitter 41 and the second laser cleaning emitter 42, which can ensure the consistency of the gate line electrode transferred by laser.

[0062] Furthermore, if Figure 1 and Figure 2 As shown, the first laser cleaning emitter 41 is located above the glass carrier 60; the second laser cleaning emitter 42 is located below the glass carrier 60. Specifically, the first laser cleaning emitter 41 is above the plane where the main surface of the glass carrier 60 is located, and the second laser cleaning emitter 42 is below the plane where the main surface of the glass carrier 60 is located. That is, when the glass carrier 60 moves to the first cleaning station corresponding to the first laser cleaning emitter 41, the first laser cleaning emitter 41 is located directly above the glass carrier 60 on the first cleaning station, and when the glass carrier 60 moves to the second cleaning station corresponding to the second laser cleaning emitter 42, the second laser cleaning emitter 42 is located directly above the glass carrier 60 on the second cleaning station.

[0063] Among them, the first laser cleaning emitter 41 generally emits infrared light, and its irradiation temperature is generally 200-300°C. For example, the irradiation temperature is 200°C, 210°C, 220°C, 240°C, 250°C, 270°C, 290°C, 300°C, etc. Specifically, the first laser cleaning emitter 41 uses a laser to hit the side of the glass carrier 60 that does not have the groove 61, so that the glass carrier 60 is heated up, and the organic components in the residual slurry are volatilized without damaging the groove 61 of the glass carrier 60. Further, the second laser cleaning emitter 42 generally emits green light or ultraviolet light. The light emitted by the second laser cleaning emitter 42 directly hits the groove 61 of the glass carrier 60, and the residual slurry in the groove 61 of the glass carrier 60 is removed in a certain way. The green light or ultraviolet light can only remove the slurry without damaging the groove 61 of the glass carrier 60.

[0064] Furthermore, if Figure 4 and Figure 5 As shown, the packing mechanism 50 may include: a packing auxiliary plate 51, a transmission device 52, a vacuum pumping device 53 and a packing device (not shown in the figure), wherein:

[0065] When the glass carrier 60 is located at the filling station, the transmission device 52 is used to drive the filling auxiliary plate 51 to move toward the glass carrier 60, so that the filling auxiliary plate 51 is in contact with the side of the glass carrier 60 having the groove 61, and after the groove 61 is filled with slurry, the filling auxiliary plate 51 is removed;

[0066] The vacuum device 53 is connected to the through hole provided on the filler auxiliary plate 51, and is used to suck the air between the filler auxiliary plate 51 and the groove 61, so that the groove 61 is in a negative pressure state;

[0067] The filling device is used to fill the groove 61 of the glass carrier 60 with slurry.

[0068] Generally, after the glass carrier 60 is mounted on the turntable 20, the side with the groove 61 faces downward. When the glass carrier 60 is located at the filling station, the filling auxiliary plate 51 is located directly below the glass carrier 60. The transmission device 52 drives the filling auxiliary plate 51 to move toward the glass carrier 60, which means that the transmission device 52 drives the filling auxiliary plate 51 to move upward. That is, the transmission device 52 and the filling auxiliary plate 51 are located below the glass carrier 60, and the filling auxiliary plate 51 is lifted upward by the transmission device 52, so that the filling auxiliary plate 51 is in contact with the glass carrier 60 located at the filling station.

[0069] The filler auxiliary plate 51 is a flat plate structure, wherein the filler auxiliary plate 51 is bonded to the surface of the glass carrier 60 having the groove 61 , which means that the filler auxiliary plate 51 is bonded to the surrounding area of ​​the groove 61 of the glass carrier 60 , so that the groove 61 forms a closed channel.

[0070] Among them, the through hole arranged on the filler auxiliary plate 51 is connected with the groove 61 of the glass carrier 60. During the vacuuming process by the vacuuming device 53, not only can the groove 61 be in a negative pressure state, but also the dust residue in the groove 61 can be further removed, that is, the vacuuming can simultaneously achieve the purpose of further cleaning the groove 61, and can ensure that the filling slurry can completely fill the groove 61, so as to further ensure the consistency of the gate line electrode formed by laser transfer.

[0071] Furthermore, if Figure 6 As shown, the turntable 20 includes a frame 21 for mounting and fixing the glass carrier 60, wherein:

[0072] One end of the frame 21 is provided with a filling hole and a filling groove communicating with the filling hole;

[0073] After the glass carrier 60 is installed and fixed on the frame 21 , the filling groove of the frame 21 is connected with the groove 61 of the glass carrier 60 ;

[0074] The filling device is used to fill the slurry into the groove 61 of the glass carrier 60 through the filling hole and the filling groove of the frame 21 .

[0075] The filling holes and the filling grooves connected to the filling holes provided on the frame 21 facilitate filling the slurry into the grooves 61, and can ensure that the slurries filled in the grooves 61 are isolated from each other. Moreover, the filling holes and the filling grooves provided on the frame 21 can be reused, and there is no need to specially provide structures such as filling holes connected to the grooves 61 on the glass carrier 60, so that the structure of the glass carrier 60 is simpler.

[0076] In addition, the frame 21 may also exist independently of the turntable 20 , that is, the frame 21 may be detached from the turntable 20 , so that the frame 21 can be replaced easily.

[0077] Furthermore, if Figures 1 to 3 As shown, the laser transfer system further includes: a positioning adsorption mechanism 70, wherein:

[0078] The positioning adsorption mechanism 70 is installed on the conveying mechanism 10, corresponding to the transfer station;

[0079] The positioning and adsorption mechanism 70 is used to position the solar cell conveyed by the conveying mechanism 10 at the transfer station and align the solar cell with the glass carrier 60 .

[0080] It is worth noting that the position of the positioning and adsorption mechanism 70 is generally fixed and does not move with the conveying mechanism 10 .

[0081] The solar cell transported by the transport mechanism is positioned on the transfer station by the positioning adsorption mechanism 70, and the transfer laser emitter 30 is aligned with the glass carrier plate 60, so that the laser can accurately transfer the slurry to the solar cell.

[0082] The positioning and adsorption mechanism 70 may include: an imaging device 71 and an adsorption device 72, wherein:

[0083] The imaging device 71 is used to evaluate whether the solar cell is aligned with the glass carrier 60;

[0084] The adsorption device 72 is used to fix the solar cell.

[0085] The imaging device 71 captures an image of the glass substrate and analyzes the image to determine whether the glass substrate is aligned with the transfer laser emitter 30 .

[0086] The adsorption device 72 fixes the solar cell by adsorption to prevent the solar cell from being broken.

[0087] In addition to being able to produce solar cells with consistent grid line electrodes, the laser transfer system provided by the embodiment of the utility model uses a glass substrate as a slurry carrier, which has a high reusability compared to existing flexible polymer films, reducing the cost of laser transfer. In addition, the coordination of slurry filling and cleaning effectively improves production efficiency, further reduces laser transfer requirements, and can meet the needs of continuous production and stable grid line electrode quality.

[0088] Furthermore, if Figure 8 As shown, the embodiment of the utility model further provides a laser transfer method implemented by the laser transfer system provided in the above embodiment, comprising:

[0089] Step S801: transporting the solar cell by the transport mechanism 10;

[0090] Step S802: The glass carrier 60 is carried by the turntable 20 and driven to rotate, and the glass carrier 60 is controlled to stay at the filling station corresponding to the filling mechanism 50; the groove 61 of the glass carrier 60 is filled with slurry by the filling mechanism 50;

[0091] Step S803: the glass carrier 60 is continuously driven to rotate by the turntable 20, and the glass carrier 60 is controlled to stay at the transfer station corresponding to the transfer laser emitter 30, and the slurry filled in the glass carrier 60 is printed onto the solar cell by the transfer laser emitter 30 through laser transfer;

[0092] Step S804 : the turntable 20 continues to drive the glass carrier 60 to rotate, and the glass carrier 60 is controlled to stay at the cleaning station corresponding to the laser cleaning mechanism 40 , and the residual slurry on the glass carrier 60 is cleaned by the laser cleaning mechanism 40 .

[0093] Wherein, for each glass substrate 60 mounted on the turntable, the above steps S802 to S803 need to be performed.

[0094] Further, for the above step S802, its specific implementation may include: driving the packing auxiliary plate 51 of the packing mechanism 50 to move toward the glass carrier 60 through the transmission device 52 configured by the packing mechanism 50, so that the packing auxiliary plate 51 is in contact with the side of the glass carrier 60 having the groove 61; sucking the air between the packing auxiliary plate 51 and the groove 61 through the vacuum device 53 configured by the packing mechanism 50; filling the groove 61 of the glass carrier 60 with slurry through the packing device configured by the packing mechanism 50. Through this process, on the one hand, the vacuum device 53 can be used to reduce the pressure in the groove 61, so that the slurry can be completely filled in the groove; on the other hand, the vacuum device 53 can remove the residue in the groove 61 during the process of sucking the air between the auxiliary plate 51 and the groove 61, so as to achieve the purpose of further cleaning the groove 61.

[0095] Further, for the case where the laser cleaning mechanism 40 includes a first laser cleaning emitter 41 and a second laser cleaning emitter 42, for the specific implementation method of the above-mentioned step S804, the turntable 20 continues to drive the glass carrier 60 to rotate, and the glass carrier 60 is controlled to stay at the first cleaning station corresponding to the first laser cleaning emitter 41. The first laser cleaning emitter 41 irradiates the main surface of the glass carrier 60 without the groove 61 with infrared light to volatilize the organic components in the slurry remaining on the glass carrier 60; thereafter, the glass carrier 60 is driven to rotate by the turntable 20, and the glass carrier 60 is controlled to stay at the second cleaning station corresponding to the second laser cleaning emitter 42. The second laser cleaning emitter 42 etches the groove 61 by laser to further clean the slurry remaining in the groove 61.

[0096] The laser energy of the second laser cleaning emitter 42 is lower than the laser energy of the first laser cleaning emitter 41, so as to improve the cleaning effect of the slurry remaining in the groove 61, effectively control the energy consumption of the cleaning process, and avoid excessive energy loss caused by cleaning.

[0097] The width of the laser emitted by the second laser cleaning emitter 42 is smaller than the width of the laser emitted by the first laser cleaning emitter 41. Preferably, the width of the laser emitted by the first laser cleaning emitter 41 is not smaller than the width of the groove 61 of the glass carrier 60, and the width of the laser emitted by the second laser cleaning emitter 42 is smaller than the width of the groove 61 of the glass carrier 60. That is, the groove is cleaned in a targeted manner during the second cleaning process, thereby achieving the purpose of further reducing the cleaning energy loss.

[0098] The introduction provided in the above steps is only used to help understand the method, structure and core idea of ​​the utility model. For ordinary technicians in this technical field, the utility model can also be improved and modified without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A laser transfer system, characterized in that: include: A conveying mechanism (10), a turntable (20), a transfer laser emitter (30) arranged around the turntable (20), a laser cleaning mechanism (40), and a filling mechanism (50), wherein: The transfer laser emitter (30) is located above the conveying mechanism (10), and a vertical projection of the transfer laser emitter (30) on the conveying mechanism (10) covers a partial area of ​​the conveying mechanism (10); The turntable (20) is used to carry the glass carrier (60), drive the glass carrier (60) to rotate, and control the glass carrier (60) to stay at a transfer station corresponding to the transfer laser emitter (30), a cleaning station corresponding to the laser cleaning mechanism (40), and a filling station corresponding to the filling mechanism (50); wherein a side of the glass carrier (60) provided with a groove (61) faces the conveying mechanism (10), and the groove (61) is used to fill slurry; The transfer laser emitter (30) is used to print the slurry filled in the glass carrier (60) onto the solar cell transported by the transport mechanism (10) by means of laser transfer; The laser cleaning mechanism (40) uses laser to clean the slurry remaining on the glass carrier plate (60); The filling mechanism (50) is used to fill the glass carrier (60) located at the filling station with slurry.

2. The laser transfer system according to claim 1, characterized in that: The laser cleaning mechanism (40) comprises: a first laser cleaning emitter (41) and a second laser cleaning emitter (42), wherein: In the rotation direction of the turntable (20), a filling station corresponding to the filling mechanism (50), a transfer station corresponding to the transfer laser emitter (30), a first cleaning station corresponding to the first laser cleaning emitter (41), and a second cleaning station corresponding to the second laser cleaning emitter (42) are arranged in circumferential order; The turntable (20) drives the glass carrier (60) to move from the filling station to the transfer station, from the transfer station to the first cleaning station, from the first cleaning station to the second cleaning station, and from the second cleaning station to the filling station, so as to sequentially perform filling, transfer, cleaning of the first laser cleaning emitter (41), and cleaning of the second laser cleaning emitter (42) on the glass carrier (60).

3. The laser transfer system according to claim 2, characterized in that: The width of the laser emitted by the first laser cleaning emitter (41) is not less than the width of the groove (61); and / or, The width of the laser emitted by the second laser cleaning emitter (42) is smaller than the width of the groove (61).

4. The laser transfer system according to claim 2 or 3, characterized in that: The first laser cleaning emitter (41) is located above the glass carrier plate (60); The second laser cleaning emitter (42) is located below the glass carrier plate (60); and / or, The transfer laser emitter (30), the first laser cleaning emitter (41), the second laser cleaning emitter (42), and the filling mechanism (50) are evenly distributed in the rotation direction of the turntable (20).

5. The laser transfer system according to claim 2 or 3, characterized in that: The number of the glass carrier plates (60) carried by the turntable (20) is consistent with the total number of the filling station, the transfer station, the first cleaning station and the second cleaning station.

6. The laser transfer system according to claim 1, characterized in that: The packing mechanism (50) comprises: a packing auxiliary plate (51), a transmission device (52), a vacuum pumping device (53) and a packing device, wherein: When the glass carrier (60) is located at the filling station, the transmission device (52) is used to drive the filling auxiliary plate (51) to move toward the glass carrier (60) so that the filling auxiliary plate (51) is in contact with a surface of the glass carrier (60) having the groove (61); after the groove (61) is filled with slurry, the filling auxiliary plate (51) is removed; The vacuum device (53) is in communication with a through hole provided on the filler auxiliary plate (51) and is used to suck air between the filler auxiliary plate (51) and the groove (61) to reduce the pressure in the groove (61); The filling device is used to fill slurry into the groove (61) of the glass carrier (60).

7. The laser transfer system according to claim 6, characterized in that: The filler auxiliary plate (51) is located below the glass carrier plate (60).

8. The laser transfer system according to claim 6, characterized in that: The turntable (20) comprises a frame (21) for mounting and fixing the glass carrier plate (60), wherein: One end of the frame (21) is provided with a filling hole and a filling groove connected to the filling hole; After the glass carrier (60) is installed and fixed on the frame (21), the filling groove of the frame (21) is connected to the groove (61) of the glass carrier (60); The filling device is used to fill slurry into the groove (61) of the glass carrier (60) through the filling hole and the filling groove of the frame (21).

9. The laser transfer system according to any one of claims 1 to 3 and 6 to 8, characterized in that: Also includes: A positioning adsorption mechanism (70), wherein: The positioning adsorption mechanism (70) is installed on the conveying mechanism (10) and corresponds to the transfer station; The positioning adsorption mechanism (70) is used to position the solar cell transported by the transport mechanism (10) at the transfer station, and to align the solar cell with the glass carrier plate (60).

10. The laser transfer system according to claim 9, characterized in that: The positioning and adsorption mechanism (70) comprises: an imaging device (71) and an adsorption device (72), wherein: The imaging device (71) is used to evaluate whether the solar cell and the glass carrier (60) are aligned; The adsorption device (72) is used to fix the solar cell.

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