A full dynamic laser transfer method and system for a photovoltaic cell device

Abstract

The application provides a full dynamic laser transfer method and system for a photovoltaic cell device, which determines the position of a first groove line to be transferred according to the information of the specified groove line of each region of a source substrate, and calculates the groove line spacing of all groove lines to be transferred; calculates the alignment offset value of the photovoltaic cell and the source substrate, and obtains the initial position of the photovoltaic cell during the transfer in combination with the initial position of the photovoltaic cell; takes the set of equally spaced position points virtually output by a laser galvanometer as a main shaft, takes all groove line positions to be transferred and the position of the photovoltaic cell during the transfer as slave shafts, respectively, and calculates the laser beam movement control data and the photovoltaic cell movement control data; and couples the laser beam movement control data and the photovoltaic cell movement control data to realize the dynamic synchronization of the laser transfer position and the photovoltaic cell position. The method can realize the full dynamic synchronization of the laser transfer position and the photovoltaic cell during the transfer, and improves the synchronization and efficiency during the transfer.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic cell manufacturing technology, specifically relating to a fully dynamic laser transfer method and system for photovoltaic cell equipment. Background Technology

[0002] In the production process of photovoltaic cells, laser transfer printing is mainly used for the fabrication of grid electrodes. For example... Figure 1 As shown, during laser transfer fabrication of grid electrodes, a grooved area is formed on the surface of the photovoltaic cell 3, and a groove line 201 is formed on the source substrate 2. The photovoltaic cell 3 with the grooved area is transported below the source substrate 2, and the laser 1 irradiates the groove line 201 carrying the paste on the source substrate 2, transferring the paste in the groove line 201 to the grooved area of ​​the photovoltaic cell 3. During the laser dynamic transfer process, the laser 1 and the photovoltaic cell 3 are always in motion. The laser transfer motion direction includes the laser mechanical movement direction A and the galvanometer direction, where the galvanometer direction and the laser mechanical movement direction A are perpendicular to each other in the horizontal plane; the photovoltaic cell movement direction B is opposite to the laser mechanical movement direction A. Therefore, the higher the dynamic synchronization between the laser transfer position and the photovoltaic cell position, the higher the transfer accuracy. Summary of the Invention

[0003] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention proposes a fully dynamic laser transfer method and system for photovoltaic cell equipment.

[0004] To achieve the above objectives, according to one aspect of the present invention, a fully dynamic laser transfer method for photovoltaic cell equipment is provided, comprising: Based on the information of the specified groove lines in each region of the source substrate, determine the position of the first groove line to be transferred; the information of the groove line includes the position of the groove line, the region in which the groove line is located, and the groove line number of the groove line; Based on the information of the specified groove lines in each region of the source substrate and the information of the first groove line that needs to be transferred, calculate the groove line spacing of all groove lines that need to be transferred. Based on the positions of the specified grooves in each region of the source substrate and the groove spacing of all grooves to be transferred, the alignment offset between the photovoltaic cell and the source substrate is calculated. Combined with the initial position of the photovoltaic cell, the initial position of the photovoltaic cell during the transfer is obtained. Using the set of equally spaced position points virtualized by the laser galvanometer as the main axis and the positions of all groove lines to be transferred as the secondary axis, the laser beam movement control data is calculated; the positions of all groove lines to be transferred are obtained through the information of the first groove line to be transferred and the groove line spacing of all groove lines to be transferred. Using the set of equally spaced virtual position points created by the laser galvanometer as the principal axis and the position of the photovoltaic cell during transfer as the secondary axis, the movement control data of the photovoltaic cell is calculated. The position of the photovoltaic cell during transfer is obtained by the initial position of the photovoltaic cell during transfer, the grid spacing of the photovoltaic cell, and the grid spacing of all grooves to be transferred. The laser beam movement control data and the photovoltaic cell movement control data are coupled to achieve dynamic synchronization between the laser transfer position and the photovoltaic cell position. The movement direction of the laser beam includes the mechanical movement direction of the laser beam and the galvanometer direction. The mechanical movement direction of the laser beam and the photovoltaic cell move relative to each other along the groove spacing direction of all grooves to be transferred. The galvanometer direction is perpendicular to the mechanical movement direction of the laser beam in the horizontal plane.

[0005] Using the method described above, the specific position of the first groove line that needs to be transferred is obtained in the following way: The grooves on the source substrate are numbered sequentially. The source substrate is divided into N regions. The grooves in each region correspond to the transfer of a photovoltaic cell. Each region has a specific groove. The serial number of the specific groove in each region is known. The position of the specific groove in each region is obtained by data acquisition. The serial number and region of the first groove to be transferred are known. The position of the first groove line to be transferred is obtained by linear interpolation using the sequence number and position of the two specific groove lines closest to the first groove line to be transferred.

[0006] Using the method described above, the specified slot line positions in each region of the source substrate are acquired through visual image information acquisition.

[0007] Using the method described above, the spacing between all grooves that need to be transferred is obtained in the following way: By identifying the positions and numbers of the two specific grooves closest to the first groove line to be transferred, the distance between these two specific grooves and the number of grooves are obtained. The average value of the spacing between these two specific grooves is then calculated as the groove spacing for all groove lines to be transferred.

[0008] Using the above method, the distance between the first groove line to be transferred and the previous specific groove line is calculated using the nearest neighbor method, and used as the alignment offset value between the photovoltaic cell and the source substrate. Along the mechanical movement direction of the laser beam, the previous specific groove line is in front, and the first groove line to be transferred is in the middle; If there is only one specific groove line adjacent to the first groove line to be transferred, then the distance between the specific groove line and the first groove line to be transferred is calculated as the alignment offset value between the photovoltaic cell and the source substrate.

[0009] Using the method described above, the laser beam movement control data is obtained in the following way: Based on the periodic scanning characteristics of the laser galvanometer, a set of virtual, equally spaced position points is used as the principal axis coordinate set; Set a first slave axis coordinate set, the number of data in the first slave axis coordinate set is the same as that in the principal axis coordinate set, both being M; Let the value of the first data in the first set of coordinate axes be the position of the first groove line to be transferred, the value of the second data be the position of the first groove line to be transferred by laser plus one times the groove line spacing, the value of the (M-1)th data be the position of the first groove line to be transferred by laser plus M-2 times the groove line spacing, and the value of the Mth data be the position of the first groove line to be transferred by laser plus M-1 times the groove line spacing. Using the first two and last two values ​​of the principal axis coordinate set as principal axis coordinates and the first two and last two values ​​of the first secondary axis coordinate set as secondary axis coordinates, cubic spline interpolation is used to fit the cubic spline formula of the first secondary axis coordinate set to the principal axis coordinate set. Based on the cubic spline formula, the values ​​of the remaining data are calculated by interpolation of the first set of axes coordinates to obtain the laser motion control data.

[0010] Using the method described above, the photovoltaic cell movement control data is obtained in the following ways: Based on the periodic scanning characteristics of the laser galvanometer, a set of virtual, equally spaced position points is used as the principal axis coordinate set; Set a second slave axis coordinate set, the number of data in the second slave axis coordinate set is the same as that in the primary axis coordinate set, both being M; Let the value of the first data in the second axis coordinate set be the initial position of the photovoltaic cell during transfer, the value of the second data be the initial position of the photovoltaic cell during transfer plus one times the spacing deviation, the value of the (M-1)th data be the initial position of the photovoltaic cell during transfer plus M-2 times the spacing deviation, and the value of the Mth data be the initial position of the photovoltaic cell during transfer plus M-1 times the spacing deviation; the spacing deviation is the difference between the grid line spacing and the groove line spacing of the photovoltaic cell. Using the first two and last two values ​​of the principal axis coordinate set as principal axis coordinates and the first two and last two values ​​of the second secondary axis coordinate set as secondary axis coordinates, cubic spline interpolation is used to fit the cubic spline formula of the second secondary axis coordinate set to the principal axis coordinate set. Based on the cubic spline formula, the values ​​of the remaining data are calculated by interpolation of the second set of coordinate axes to obtain the photovoltaic cell movement control data.

[0011] Using the method described above, the laser beam movement control data and the photovoltaic cell movement control data are respectively cam data used to control the movement of the laser beam and the photovoltaic cell.

[0012] Using the above method, the laser beam movement control data and the photovoltaic cell movement control data are coupled by establishing a one-to-one correspondence between the laser beam movement control data and the photovoltaic cell movement control data at the same transfer position.

[0013] According to another aspect of the present invention, a fully dynamic laser transfer system for photovoltaic cell equipment is provided, comprising: The source substrate positioning module is used to determine the position of the first groove line to be transferred based on the information of the specified groove lines in each region of the source substrate; the information of the groove line includes the position of the groove line, the region where the groove line is located, and the groove line number of the groove line; The slot spacing calculation module is used to calculate the slot spacing of all slots that need to be transferred based on the information of the specified slots in each region of the source substrate and the information of the first slot that needs to be transferred. The photovoltaic cell positioning module is used to calculate the alignment offset value between the photovoltaic cell and the source substrate based on the position of the specified groove lines in each region of the source substrate and the groove line spacing of all groove lines to be transferred. Combined with the initial position of the photovoltaic cell, the initial position of the photovoltaic cell during the transfer is obtained. The laser beam movement control data generation module is used to calculate laser beam movement control data with the set of equally spaced position points virtually generated by the laser galvanometer as the main axis and the positions of all groove lines to be transferred as the secondary axis. The positions of all groove lines to be transferred are obtained through the information of the first groove line to be transferred and the groove line spacing of all groove lines to be transferred. The photovoltaic cell movement control data generation module is used to calculate the photovoltaic cell movement control data by using a set of equally spaced position points virtually generated by the laser galvanometer as the main axis and the position of the photovoltaic cell during transfer as the secondary axis. The position of the photovoltaic cell during transfer is obtained by the initial position of the photovoltaic cell during transfer, the grid spacing of the photovoltaic cell, and the grid spacing of all grooves to be transferred. The coupling synchronization module is used to couple the laser beam movement control data and the photovoltaic cell movement control data to achieve dynamic synchronization between the laser transfer position and the photovoltaic cell position. The movement direction of the laser beam includes the mechanical movement direction of the laser beam and the galvanometer direction. The mechanical movement direction of the laser beam and the photovoltaic cell move relative to each other along the groove spacing direction of all grooves to be transferred. The galvanometer direction is perpendicular to the mechanical movement direction of the laser beam in the horizontal plane.

[0014] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: The positions of all grooves to be transferred and the positions of the photovoltaic cells during the transfer are located separately. Then, a set of equally spaced position points is virtualized using a laser galvanometer, thereby generating laser movement control data and photovoltaic cell movement control data respectively. Finally, the laser movement control data and photovoltaic cell movement control data are coupled to achieve full dynamic synchronization between the laser transfer position and the photovoltaic cells during the transfer process, thus improving the synchronization and efficiency of the transfer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the transfer process provided in an embodiment of the present invention.

[0016] Figure 2 This is a flowchart of a method provided in an embodiment of the present invention.

[0017] In the diagram: 1-Laser, 2-Source substrate, 201-Groove line, 3-Photovoltaic cell, A-Laser transfer direction, B-Photovoltaic cell direction. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0019] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] The present invention aims to provide a fully dynamic laser transfer method and system for photovoltaic cell equipment, which enables the photovoltaic cell and the laser to be in continuous motion (rather than stepping) during the laser transfer process, thereby improving the dynamic synchronization between the laser transfer position and the photovoltaic cell position and improving efficiency.

[0021] According to one aspect of the present invention, a fully dynamic laser transfer method for photovoltaic cell equipment is provided, such as... Figure 2 As shown, it includes: S1. Determine the position of the first groove line to be transferred based on the information of the specified groove lines in each region of the source substrate; the information of the groove line includes the position of the groove line, the region where the groove line is located, and the groove line number.

[0022] The number of grooves on a source substrate is much greater than the number of transfer grid lines in a photovoltaic cell. Therefore, the source substrate is divided into several regions, each with parallel, spaced grooves. Each groove in a region corresponds to the transfer of one photovoltaic cell. The direction of the groove extension is defined as the X-axis, and the direction of the groove spacing is defined as the Y-axis. The regions are arranged sequentially in the Y-axis. Before transfer, it is necessary to determine which specific region of the source substrate the photovoltaic cell corresponds to for transfer.

[0023] In this embodiment, the grooves on the source substrate are sequentially numbered, and the source substrate is divided into N regions. Each groove in each region corresponds to the transfer of a photovoltaic cell. Each region has a specific groove, and the sequence number of each specific groove in each region is known. The position of each specific groove in each region is obtained through data acquisition; in some embodiments, this can be achieved through visual image information. The sequence number and region of the first groove to be transferred are known.

[0024] In this embodiment, the slot lines on the source substrate are numbered consecutively in ascending order along the mechanical movement direction of the laser beam. The position of the first slot line to be transferred is obtained using linear interpolation based on the numbers and positions of the two closest specific slot lines to the first slot line to be transferred, as expressed by the following formula:

[0025] In the formula, Px Lx[i] is the position of the first groove line to be transferred, i is the i-th data in the specific groove line position data of the source substrate, i∈[0,N-1], Ln[i] is the groove line number corresponding to the i-th data in the specific groove line position data of the source substrate, n is the number of the first groove line to be transferred, and N is the number of regions of the source substrate. In some embodiments, N=4.

[0026] S2. Based on the information of the specified groove lines in each region of the source substrate and the information of the first groove line that needs to be transferred, calculate the groove line spacing of all groove lines that need to be transferred.

[0027] Specifically, by using the positions and numbers of the two specific grooves closest to the first groove to be transferred, the distance between these two specific grooves and the number of grooves are obtained respectively. The average spacing between the grooves is then calculated as the groove spacing for all grooves to be transferred. This can be expressed by the following formula:

[0028] In the formula, Pitch represents the spacing between all the grooves to be transferred. It should be noted that the groove spacing is an average value, determined by the area where the first groove to be transferred is located. In other words, the groove spacing for different areas corresponds to the location of the first groove to be transferred.

[0029] S3. Based on the position of the specified grooves in each region of the source substrate and the groove spacing of all grooves to be transferred, calculate the alignment offset between the photovoltaic cell and the source substrate. Combined with the initial position of the photovoltaic cell, obtain the initial position of the photovoltaic cell during the transfer.

[0030] In this embodiment, the distance between the first groove line to be transferred and the previous specific groove line is calculated using the nearest neighbor method, and this distance is used as the alignment offset value between the photovoltaic cell and the source substrate. Along the mechanical movement direction of the laser beam, the previous specific groove line is in front, and the first groove line to be transferred is in the middle. In this embodiment, since the groove lines on the source substrate are numbered consecutively in ascending order along the mechanical movement direction of the laser beam, the previous specific groove line is defined as the specific groove line with a smaller number than the first groove line to be transferred among those adjacent to it. If there is only one specific groove line adjacent to the first groove line to be transferred, the distance between this specific groove line and the first groove line to be transferred is calculated, and this distance is used as the alignment offset value between the photovoltaic cell and the source substrate.

[0031] The nearest neighbor method for calculating the alignment offset between the photovoltaic cell and the source substrate can be summarized as follows: In a certain region, the corresponding slot pitch and the alignment offset Δx between the photovoltaic cell and the source substrate are calculated using the nearest neighbor i, as expressed by the following formula:

[0032] In the formula This represents the alignment offset between the photovoltaic cell and the source substrate.

[0033] S4. The laser beam emitted by the laser is a point laser. The laser transfer motion direction includes the laser mechanical movement direction and the galvanometer direction, where the galvanometer direction and the laser mechanical movement direction are perpendicular to each other in the horizontal plane. Using the set of equally spaced virtual positions generated by the laser galvanometer as the principal axis and the positions of all groove lines to be transferred as the secondary axes, the laser beam movement control data is calculated. The positions of all groove lines to be transferred are obtained through the information of the first groove line to be transferred and the groove spacing of all groove lines to be transferred. Specifically, the following steps are included: S401. Based on the periodic scanning characteristics of the laser galvanometer, a virtual set of equally spaced position points is used as the master axis coordinate set MasterSets. In this embodiment, the starting point is 0, the motion is uniform, and the interval is 1000μm.

[0034] S402. Set the first slave axis coordinate set SlaveSets1. The number of data in the first slave axis coordinate set SlaveSets1 is the same as that in the master axis coordinate set, which is M. Initially, all data in the first slave axis coordinate set SlaveSets1 is 0.

[0035] S403. Let the value of the first data in the first slave axis coordinate set be the position of the first groove line to be transferred, the value of the second data be the position of the first groove line to be transferred by laser plus one times the groove line spacing, the value of the (M-1)th data be the position of the first groove line to be transferred by laser plus M-2 times the groove line spacing, and the value of the Mth data be the position of the first groove line to be transferred by laser plus M-1 times the groove line spacing.

[0036] The formula is expressed as follows:

[0037] In the formula, This is the first data point in the first set of coordinate axes. This is the second data point in the first set of coordinate axes. This is the (M-1)th data point in the first set of coordinate axes, i.e., the second to last data point. This is the Mth data point in the first set of coordinate axes, which is also the last data point.

[0038] S404. Using the first two and last two values ​​of the principal axis coordinate set as principal axis coordinates and the first two and last two values ​​of the first secondary axis coordinate set as secondary axis coordinates, the cubic spline interpolation method is used to fit the cubic spline formula of the first secondary axis coordinate set to the principal axis coordinate set.

[0039] In this embodiment, the principal axis coordinate is the X-direction coordinate, and the secondary axis coordinate is the Y-direction coordinate, where the Y-direction is the spacing direction, i.e., the mechanical movement direction of the laser beam; the X-direction is the line direction of the groove, i.e., the movement direction of the galvanometer; X and Y are perpendicular to each other on the horizontal plane.

[0040] S405. Based on the cubic spline formula, interpolate the values ​​of the remaining data from the first set of axes coordinates to obtain the laser movement control data. The laser movement control data is the cam data used to control the laser movement.

[0041] S5. Using the set of equally spaced position points virtualized by the laser galvanometer as the main axis and the position of the photovoltaic cell during transfer as the secondary axis, calculate the movement control data of the photovoltaic cell; the position of the photovoltaic cell during transfer is obtained by the initial position of the photovoltaic cell during transfer, the grid spacing of the photovoltaic cell, and the grid spacing of all grooves to be transferred.

[0042] The principle of this step is the same as S4, except that the axis is the position of the photovoltaic cell during the transfer, specifically including: S501. Based on the periodic scanning characteristics of the laser galvanometer, a virtual set of equally spaced position points is used as the master axis coordinate set MasterSets. In this embodiment, the starting point is 0, the motion is uniform, and the interval is 1000μm.

[0043] S502. Set the second slave axis coordinate set SlaveSets2. The number of data in the second slave axis coordinate set SlaveSets2 is the same as that in the master axis coordinate set MasterSets, which is M.

[0044] S503. Let the value of the first data in the second slave coordinate set SlaveSets2 be the initial position of the photovoltaic cell during transfer, the value of the second data be the initial position of the photovoltaic cell during transfer plus one times the spacing deviation, the value of the (N-1)th data be the initial position of the photovoltaic cell during transfer plus N-2 times the spacing deviation, and the value of the Nth data be the initial position of the photovoltaic cell during transfer plus N-1 times the spacing deviation; the spacing deviation is the difference between the grid line spacing and the slot line spacing of the photovoltaic cell.

[0045] The formula is expressed as follows:

[0046] In the formula, This represents the initial position of the photovoltaic cells during the transfer process. The grid spacing of photovoltaic cells is preset according to the grid requirements of the photovoltaic cells; For the first data in the second set of coordinate axes, This is the second data point in the second set of coordinate axes. This is the (M-1)th data point in the second set of coordinate axes, i.e., the second to last data point. This is the Mth data point in the second set of coordinate axes, which is also the last data point.

[0047] S504. Using the first two and last two values ​​of the principal axis coordinate set as principal axis coordinates and the first two and last two values ​​of the second secondary axis coordinate set as secondary axis coordinates, the cubic spline interpolation method is used to fit the cubic spline formula of the second secondary axis coordinate set to the principal axis coordinate set.

[0048] S505. Based on the cubic spline formula, the values ​​of the remaining data are calculated by interpolation of the second set of coordinate axes to obtain the photovoltaic cell movement control data. The photovoltaic cell movement control data is the cam data used to control the movement of the photovoltaic cells.

[0049] S6. Couple the laser beam movement control data and the photovoltaic cell movement control data to achieve dynamic synchronization between the laser transfer position and the photovoltaic cell position; wherein the movement direction of the laser beam includes the mechanical movement direction of the laser beam and the galvanometer direction, the mechanical movement direction of the laser beam and the photovoltaic cell move relative to each other along the groove spacing direction of all grooves to be transferred, and the galvanometer direction and the mechanical movement direction of the laser beam are perpendicular to each other in the horizontal plane.

[0050] More specifically, this embodiment achieves coupling of laser movement control data and photovoltaic cell movement control data by establishing a one-to-one correspondence between the laser movement control data and the photovoltaic cell movement control data at the same transfer position.

[0051] According to another aspect of the present invention, a fully dynamic laser transfer system for photovoltaic cell equipment corresponding to the above method is provided, comprising: The source substrate positioning module is used to determine the position of the first groove line to be transferred based on the information of the specified groove lines in each region of the source substrate; the information of the groove line includes the position of the groove line, the region where the groove line is located, and the groove line number.

[0052] The slot spacing calculation module is used to calculate the slot spacing of all slots that need to be transferred, based on the information of the specified slots in each region of the source substrate and the information of the first slot that needs to be transferred.

[0053] The photovoltaic cell positioning module is used to calculate the alignment offset value between the photovoltaic cell and the source substrate based on the position of the specified groove lines in each region of the source substrate and the groove line spacing of all groove lines to be transferred. Combined with the initial position of the photovoltaic cell, the initial position of the photovoltaic cell during transfer is obtained.

[0054] The laser beam movement control data generation module is used to calculate laser beam movement control data with the set of equally spaced position points virtually generated by the laser galvanometer as the main axis and the positions of all groove lines to be transferred as the secondary axis. The positions of all groove lines to be transferred are obtained through the information of the first groove line to be transferred and the groove line spacing of all groove lines to be transferred.

[0055] The photovoltaic cell movement control data generation module is used to calculate the photovoltaic cell movement control data by using a set of equally spaced position points virtually generated by the laser galvanometer as the main axis and the position of the photovoltaic cell during transfer as the secondary axis. The position of the photovoltaic cell during transfer is obtained by the initial position of the photovoltaic cell during transfer, the grid spacing of the photovoltaic cell, and the grid spacing of all grooves that need to be transferred.

[0056] The coupling synchronization module is used to couple the laser beam movement control data and the photovoltaic cell movement control data to achieve dynamic synchronization between the laser transfer position and the photovoltaic cell position. The movement direction of the laser beam includes the mechanical movement direction of the laser beam and the galvanometer direction. The mechanical movement direction of the laser beam and the photovoltaic cell move relative to each other along the groove spacing direction of all grooves to be transferred. The galvanometer direction is perpendicular to the mechanical movement direction of the laser beam in the horizontal plane.

[0057] By employing the method and system of this invention, based on the characteristics of the groove lines on the source substrate and the path of laser transfer, the positions of all groove lines to be transferred and the positions of the photovoltaic cells during transfer are located respectively. Then, a set of equally spaced position points is virtually generated using a laser galvanometer, thereby generating laser movement control data and photovoltaic cell movement control data respectively. Finally, the laser movement control data and photovoltaic cell movement control data are coupled together, thereby achieving full dynamic synchronization between the laser transfer position and the photovoltaic cells during the transfer process, improving the synchronization and efficiency during transfer.

[0058] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0059] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0060] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fully dynamic laser transfer method for photovoltaic cell equipment, characterized in that: include: Based on the information of the specified groove lines in each region of the source substrate, determine the position of the first groove line to be transferred; the information of the groove line includes the position of the groove line, the region in which the groove line is located, and the groove line number of the groove line; Based on the information of the specified groove lines in each region of the source substrate and the information of the first groove line that needs to be transferred, calculate the groove line spacing of all groove lines that need to be transferred. Based on the positions of the specified grooves in each region of the source substrate and the groove spacing of all grooves to be transferred, the alignment offset between the photovoltaic cell and the source substrate is calculated. Combined with the initial position of the photovoltaic cell, the initial position of the photovoltaic cell during the transfer is obtained. Using the set of equally spaced position points virtualized by the laser galvanometer as the main axis and the positions of all groove lines to be transferred as the secondary axis, the laser beam movement control data is calculated; the positions of all groove lines to be transferred are obtained through the information of the first groove line to be transferred and the groove line spacing of all groove lines to be transferred. Using the set of equally spaced virtual position points created by the laser galvanometer as the principal axis and the position of the photovoltaic cell during transfer as the secondary axis, the movement control data of the photovoltaic cell is calculated. The position of the photovoltaic cell during transfer is obtained by the initial position of the photovoltaic cell during transfer, the grid spacing of the photovoltaic cell, and the grid spacing of all grooves to be transferred. The laser beam movement control data and the photovoltaic cell movement control data are coupled to achieve dynamic synchronization between the laser transfer position and the photovoltaic cell position. The movement direction of the laser beam includes the mechanical movement direction of the laser beam and the galvanometer direction. The mechanical movement direction of the laser beam and the photovoltaic cell move relative to each other along the groove spacing direction of all grooves to be transferred. The galvanometer direction is perpendicular to the mechanical movement direction of the laser beam in the horizontal plane.

2. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1, characterized in that: The position of the first groove line that needs to be transferred is obtained in the following way: The grooves on the source substrate are numbered sequentially. The source substrate is divided into N regions. The grooves in each region correspond to the transfer of a photovoltaic cell. Each region has a specific groove. The serial number of the specific groove in each region is known. The position of the specific groove in each region is obtained by data acquisition. The serial number and region of the first groove to be transferred are known. The position of the first groove line to be transferred is obtained by linear interpolation using the sequence numbers and positions of the two specific groove lines closest to the first groove line to be transferred.

3. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1 or 2, characterized in that: The specified slot line positions in each region of the source substrate are acquired using visual image information acquisition.

4. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1, characterized in that: The spacing between all grooves that need to be transferred is obtained in the following way: By identifying the positions and numbers of the two specific grooves closest to the first groove line to be transferred, the distance between these two specific grooves and the number of grooves are obtained. The average value of the spacing between these two specific grooves is then calculated as the groove spacing for all groove lines to be transferred.

5. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1 or 4, characterized in that: The nearest neighbor method is used to calculate the distance between the first groove line to be transferred and the previous specific groove line, which is used as the alignment offset value between the photovoltaic cell and the source substrate. Along the mechanical movement direction of the laser beam, the previous specific groove line is in front, and the first groove line to be transferred is in the middle; If there is only one specific groove line adjacent to the first groove line to be transferred, then the distance between the specific groove line and the first groove line to be transferred is calculated as the alignment offset value between the photovoltaic cell and the source substrate.

6. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1, characterized in that: The laser beam movement control data is obtained in the following ways: Based on the periodic scanning characteristics of the laser galvanometer, a set of virtual, equally spaced position points is used as the principal axis coordinate set; Set a first slave axis coordinate set, the number of data in the first slave axis coordinate set is the same as that in the principal axis coordinate set, both being M; Let the value of the first data in the first set of coordinate axes be the position of the first groove line to be transferred, the value of the second data be the position of the first groove line to be transferred by laser plus one times the groove line spacing, the value of the (M-1)th data be the position of the first groove line to be transferred by laser plus M-2 times the groove line spacing, and the value of the Mth data be the position of the first groove line to be transferred by laser plus M-1 times the groove line spacing. Using the first two and last two values ​​of the principal axis coordinate set as principal axis coordinates and the first two and last two values ​​of the first secondary axis coordinate set as secondary axis coordinates, cubic spline interpolation is used to fit the cubic spline formula of the first secondary axis coordinate set to the principal axis coordinate set. Based on the cubic spline formula, the values ​​of the remaining data are calculated by interpolation of the first set of axes coordinates to obtain the laser motion control data.

7. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1, characterized in that: The photovoltaic cell movement control data is obtained in the following ways: Based on the periodic scanning characteristics of the laser galvanometer, a set of virtual, equally spaced position points is used as the principal axis coordinate set; Set a second slave axis coordinate set, the number of data in the second slave axis coordinate set is the same as that in the primary axis coordinate set, both being M; Let the value of the first data in the second axis coordinate set be the initial position of the photovoltaic cell during transfer, the value of the second data be the initial position of the photovoltaic cell during transfer plus one times the spacing deviation, the value of the (M-1)th data be the initial position of the photovoltaic cell during transfer plus M-2 times the spacing deviation, and the value of the Mth data be the initial position of the photovoltaic cell during transfer plus M-1 times the spacing deviation; the spacing deviation is the difference between the grid line spacing and the groove line spacing of the photovoltaic cell. Using the first two and last two values ​​of the principal axis coordinate set as principal axis coordinates and the first two and last two values ​​of the second secondary axis coordinate set as secondary axis coordinates, cubic spline interpolation is used to fit the cubic spline formula of the second secondary axis coordinate set to the principal axis coordinate set. Based on the cubic spline formula, the values ​​of the remaining data are calculated by interpolation of the second set of coordinate axes to obtain the photovoltaic cell movement control data.

8. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1, characterized in that: The laser beam movement control data and the photovoltaic cell movement control data are cam data used to control the movement of the laser beam and the photovoltaic cell, respectively.

9. The fully dynamic laser transfer method for photovoltaic cell equipment according to claim 1, characterized in that: By establishing a one-to-one correspondence between laser beam movement control data and photovoltaic cell movement control data at the same transfer position, the coupling of laser beam movement control data and photovoltaic cell movement control data is achieved.

10. A fully dynamic laser transfer system for photovoltaic cell equipment, characterized in that: include: The source substrate positioning module is used to determine the position of the first groove line to be transferred based on the information of the specified groove lines in each region of the source substrate; the information of the groove line includes the position of the groove line, the region where the groove line is located, and the groove line number of the groove line; The slot spacing calculation module is used to calculate the slot spacing of all slots that need to be transferred based on the information of the specified slots in each region of the source substrate and the information of the first slot that needs to be transferred. The photovoltaic cell positioning module is used to calculate the alignment offset value between the photovoltaic cell and the source substrate based on the position of the specified groove lines in each region of the source substrate and the groove line spacing of all groove lines to be transferred. Combined with the initial position of the photovoltaic cell, the initial position of the photovoltaic cell during the transfer is obtained. The laser beam movement control data generation module is used to calculate laser beam movement control data with the set of equally spaced position points virtually generated by the laser galvanometer as the main axis and the positions of all groove lines to be transferred as the secondary axis. The positions of all groove lines to be transferred are obtained through the information of the first groove line to be transferred and the groove line spacing of all groove lines to be transferred. The photovoltaic cell movement control data generation module is used to calculate the photovoltaic cell movement control data by using a set of equally spaced position points virtually generated by the laser galvanometer as the main axis and the position of the photovoltaic cell during transfer as the secondary axis. The position of the photovoltaic cell during transfer is obtained by the initial position of the photovoltaic cell during transfer, the grid spacing of the photovoltaic cell, and the grid spacing of all grooves to be transferred. The coupling synchronization module is used to couple the laser beam movement control data and the photovoltaic cell movement control data to achieve dynamic synchronization between the laser transfer position and the photovoltaic cell position. The movement direction of the laser beam includes the mechanical movement direction of the laser beam and the galvanometer direction. The mechanical movement direction of the laser beam and the photovoltaic cell move relative to each other along the groove spacing direction of all grooves to be transferred. The galvanometer direction is perpendicular to the mechanical movement direction of the laser beam in the horizontal plane.

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