To-be-scribed line positioning method and system for solar cell laser scribing

Abstract

The invention discloses a to-be-scribed line positioning method and system for solar cell laser scribing. The positioning method comprises the steps that a first coordinate system and a second coordinate system are established; the distance between the second coordinate origin and the center point of the laser cutting head is obtained, so that a first distance parameter is obtained; obtaining a second distance parameter based on a preset line spacing between the positioning line and the to-be-scribed line and the first deviation angle; acquiring a third distance parameter of each coordinate point on the positioning line relative to the second origin of coordinates; obtaining a coordinate value of the second coordinate origin to obtain a first coordinate parameter; and based on the first distance parameter, the second distance parameter, the third distance parameter, the first coordinate parameter and the position of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin, obtaining a second coordinate parameter of a projection point corresponding to each coordinate point on the positioning line in the first coordinate system on the to-be-scribed line. Based on the positioning method, the positioning of the to-be-scribed line is more accurate and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning a line to be scribed in a solar cell scribing operation, and in particular to a method and system for positioning a line to be scribed for solar cell laser scribing. Background Art

[0002] The main purpose of laser scribing of solar cells is to improve the conversion efficiency of solar cells and optimize the performance of the cells. Laser scribing technology forms scribing lines in the solar panel, thereby dividing the solar panel substrate into multiple interconnected cells. This technology can reduce the energy loss of solar cells during the manufacturing and connection process, thereby improving the overall conversion efficiency of solar cells.

[0003] In the process of marking, multiple parallel laser beams are usually used to mark the lines together to achieve efficient and fast marking operations. This requires operators to strictly control the position, angle and spacing of parallel lines. If there are any mistakes, the markings may cross or overlap, which may lead to the risk of scrapping the entire plate material.

[0004] Taking three parallel lines (P1 / P2 / P3) as an example, the positioning process of parallel lines is generally: use the predetermined P1 as the positioning line, position P2 and scribe with P2, then use P2 as the positioning line, position P3 and scribe with P3. However, in actual operation, since the glass layer of the solar cell is placed on the fixture and the edge of the glass layer is usually not straight, it is difficult to make P1 or P2 completely parallel to the horizontal scribing axis of the machine tool. At the same time, the contact surface between the fixture and the edge of the glass cannot be clamped with high precision, and the accuracy of different scribing equipment for scribing the same piece of material cannot be guaranteed. Summary of the invention

[0005] The object of the present invention is to provide a method and system for positioning a line to be scribed for solar cell laser scribing, which can quickly locate the line to be scribed according to a positioning line and can adapt to various scribing conditions.

[0006] To achieve the above object, the present invention discloses a method for positioning a line to be scribed for laser scribing of a solar cell, comprising: Taking any point on the machine tool as the first coordinate origin, taking the first direction as the X-axis direction, and taking the second direction perpendicular to the first direction as the Y-axis direction, to establish a first coordinate system; In the first coordinate system, any point on the preset positioning line is taken as the second coordinate origin, the first direction is taken as the X-axis direction, and the second direction is taken as the Y-axis direction to establish a second coordinate system; In the first coordinate system, obtaining the distance between the second coordinate origin and the center point of the laser cutting head to obtain a first distance parameter; In the second coordinate system, based on a preset line spacing between the positioning line and the line to be scribed and a first offset angle of the positioning line relative to the positive direction of the first direction, a second distance parameter representing an offset distance between the positioning line and the line to be scribed is obtained; In the second coordinate system, obtaining a third distance parameter of each coordinate point on the positioning line relative to the second coordinate origin; In the first coordinate system, obtaining the coordinate value of the second coordinate origin to obtain a first coordinate parameter; Based on the first distance parameter, the second distance parameter, the third distance parameter, the first coordinate parameter and the positions of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin, the second coordinate parameters of the projection points corresponding to each coordinate point on the positioning line in the first coordinate system on the line to be engraved are obtained.

[0007] Specifically, the first distance parameter includes a first projection distance of the distance between the second coordinate origin and the center point of the laser cutting head in the first direction and a second projection distance in the second direction; The first distance parameter is:

[0008] in, is the first distance parameter, , are the first projection distance and the second projection distance respectively; The first projection distance and the second projection distance The calculation formula is:

[0009]

[0010] in, , are the coordinate values ​​of the center point of the laser cutting head on the X-axis and Y-axis in the first coordinate system, respectively, , are respectively the coordinate values ​​of the second coordinate origin on the X-axis and the Y-axis in the first coordinate system.

[0011] Specifically, the second distance parameter includes a third projection distance in the first direction and a fourth projection distance in the second direction; The second distance parameter is:

[0012] in, is the second distance parameter, , are the third projection distance and the fourth projection distance respectively; when When the third projection distance and the fourth projection distance The calculation formula is:

[0013]

[0014] when When the third projection distance and the fourth projection distance The calculation formula is:

[0015]

[0016] in, is the line spacing preset between the positioning line and the line to be scribed, is the first offset angle.

[0017] Specifically, the obtaining of a third distance parameter of each coordinate point on the positioning line relative to the second coordinate origin includes: In the second coordinate system, obtaining the distance between each coordinate point on the positioning line and the second coordinate origin to obtain a fourth distance parameter; The third distance parameter is obtained based on the fourth distance parameter and the first offset angle.

[0018] Furthermore, the third distance parameter includes a fifth projection distance in the first direction and a sixth projection distance in the second direction; The third distance parameter is:

[0019] in, is the third distance parameter, , are the fifth projection value and the sixth projection value respectively; The fourth distance parameter The calculation formula is:

[0020] in, is the coordinate point on the positioning line, , are respectively the coordinate values ​​of the coordinate point on the positioning line on the X-axis and the Y-axis in the second coordinate system; when When the fifth projection value and the sixth projection value The calculation formula is:

[0021]

[0022] when When the fifth projection value and the sixth projection value The calculation formula is:

[0023]

[0024] in, is the first offset angle.

[0025] Specifically, the second coordinate parameter The calculation formula is:

[0026] in, is the coordinate point on the positioning line The corresponding projection point on the line to be scribed, , , as well as The positive or negative value of is determined according to the position of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin.

[0027] The present invention also discloses a positioning system for a line to be scribed used for laser scribing of a solar cell. The positioning system works based on the positioning method described above.

[0028] The present invention also discloses a system for positioning a line to be scribed for laser scribing of a solar cell, which comprises: one or more processors; Memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for executing the positioning method as described above.

[0029] The present invention also discloses a computer-readable storage medium, characterized in that it includes a computer program, and the computer program can be executed by a processor to complete the positioning method as described above.

[0030] Compared with the prior art, the method for positioning the lines to be scribed for laser scribing of solar cells provided by the above technical solution of the present invention ensures accurate positioning and calculation in the global and local ranges by establishing two rectangular coordinate systems. The positioning method obtains multiple key parameters, including a first distance parameter, a second distance parameter, a third distance parameter and a first coordinate parameter. The parametric expression of these key parameters makes the calculation more convenient, and the position of the lines to be scribed calculated based on multiple key parameters is also more accurate and easy to express. This positioning method is suitable for different machine tools and laser scribing tasks. By adjusting the preset machine tool origin, the second coordinate origin, the line spacing, and obtaining key parameters such as the first offset angle representing the degree of material inclination, it can flexibly adapt to different scribing requirements and conditions, improve the accuracy and efficiency of positioning, reduce human errors and repetitive work, and make the scribing operation more efficient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the first coordinate system and the positioning system in an embodiment of the present invention.

[0032] Figure 2 The figure is a flow chart of a positioning method in an embodiment of the present invention.

[0033] Figure 3 Schematic diagram of positioning of the lines to be scribed when the left side of the glass layer is lower than the right side in an embodiment of the present invention.

[0034] Figure 4 In the embodiment of the present invention Figure 3 Magnified view of P1 within.

[0035] Figure 5 In the embodiment of the present invention Figure 3 Magnified view of P2.

[0036] Figure 6 Schematic diagram of positioning of the lines to be scribed when the right side of the glass layer is lower than the left side in an embodiment of the present invention.

[0037] Figure 7 In the embodiment of the present invention Figure 6 Magnified view of P1 within.

[0038] Figure 8 In the embodiment of the present invention Figure 6 Magnified view of P2. DETAILED DESCRIPTION

[0039] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0040] See also Figure 1As shown, the laser scribing operation is performed on the machine tool plane, which includes a fixture for clamping the solar cell. The top layer of the solar cell is a glass layer. The laser cutting head is used to emit a laser line for scribing. The laser line that has been scribed is used as the positioning line. Through the calculation of the positioning line, the next line to be scribed parallel to the positioning line can be obtained.

[0041] The embodiment of the present invention discloses a method for positioning a line to be scribed for laser scribing of a solar cell, so as to quickly and accurately position the line to be scribed for scribing. The method can adapt to different scribing requirements and conditions, improve the accuracy and efficiency of positioning, and thus enhance the reliability of the scribing operation. Figure 2 As shown, the positioning method specifically includes the following steps: S1: Take any point on the machine tool as the first coordinate origin, take the first direction as the X-axis direction, and take the second direction perpendicular to the first direction as the Y-axis direction to establish a first coordinate system.

[0042] S2: In the first coordinate system, any point on the preset positioning line is taken as the second coordinate origin, and the first direction is taken as the X-axis direction and the second direction is taken as the Y-axis direction to establish a second coordinate system.

[0043] S3: In the first coordinate system, obtain the distance between the second coordinate origin and the center point of the laser cutting head to obtain a first distance parameter.

[0044] S4: In the second coordinate system, based on a preset line spacing between the positioning line and the line to be scribed and a first offset angle of the positioning line relative to the positive direction of the first direction, a second distance parameter representing the offset distance between the positioning line and the line to be scribed is obtained.

[0045] S5: In the second coordinate system, obtain a third distance parameter of each coordinate point on the positioning line relative to the second coordinate origin.

[0046] S6: In the first coordinate system, obtain the coordinate value of the second coordinate origin to obtain the first coordinate parameter.

[0047] S7: Based on the first distance parameter, the second distance parameter, the third distance parameter, the first coordinate parameter and the position of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin, obtain the second coordinate parameter of the projection point corresponding to each coordinate point on the positioning line in the first coordinate system on the line to be engraved.

[0048] In this embodiment, the coordinate values ​​and the first offset angle of all points on the positioning line in the first coordinate system and the second coordinate system can be obtained by a positioning camera, and the first distance parameter, the second distance parameter and the third distance parameter are calculated by obtaining the coordinate values ​​of each point, so as to finally obtain the second coordinate parameters of the projection points corresponding to each coordinate point on the positioning line in the first coordinate system on the line to be scribed. The positioning camera is set so that its center point coincides with the origin of the second coordinate.

[0049] Compared with the prior art, the method for locating the line to be scribed for solar cell laser scribing proposed in the present invention firstly ensures accurate positioning and calculation in both global and local ranges by establishing two rectangular coordinate systems. The acquisition of multiple parameters makes the originally complex and changeable positioning process intuitive and convenient, greatly simplifies the calculation steps, and improves the efficiency and accuracy of positioning.

[0050] Secondly, this positioning method is also highly flexible and adaptable. It can be widely used in different types of machine tools and laser marking tasks (such as uneven surfaces of materials to be marked, etc.). By flexibly adjusting the preset machine tool origin, the second coordinate origin, the line spacing, and accurately obtaining the first offset angle representing the degree of material inclination, and other key parameters, it can easily cope with various complex and changeable marking needs and conditions. This high degree of flexibility and adaptability not only significantly improves the accuracy and efficiency of positioning, but also effectively reduces the occurrence of human errors and repetitive work. Technicians only need to perform simple parameter settings and adjustments according to actual needs to easily complete high-quality laser marking operations.

[0051] In summary, the solar cell laser scribing positioning method provided by the present invention realizes the precise positioning of the lines to be scribed through dual coordinate system positioning and parameterized calculation, simplifies the calculation process, improves the scribing accuracy and efficiency, and at the same time has good flexibility and adaptability, reduces human errors, and improves the efficiency and reliability of the scribing operation.

[0052] Specifically, the first distance parameter includes a first projection distance of the distance between the second coordinate origin and the center point of the laser cutting head in the first direction and a second projection distance in the second direction; The first distance parameter is:

[0053] in, is the first distance parameter, , are the first projection distance and the second projection distance respectively; First projection distance and the second projection distance The calculation formula is:

[0054]

[0055] in, , are the coordinate values ​​of the center point of the laser cutting head on the X-axis and Y-axis in the first coordinate system, , are the coordinate values ​​of the second coordinate origin on the X-axis and the Y-axis in the first coordinate system respectively.

[0056] Specifically, the second distance parameter includes a third projection distance in the first direction and a fourth projection distance in the second direction; The second distance parameter is:

[0057] in, is the second distance parameter, , They are the third projection distance and the fourth projection distance respectively; when When the third projection distance and the fourth projection distance The calculation formula is:

[0058]

[0059] when When the third projection distance and the fourth projection distance The calculation formula is:

[0060]

[0061] in, The preset line spacing between the positioning line and the line to be scribed, is the first offset angle.

[0062] In particular, please refer to Figure 3 and Figure 6 , Figure 3 The first offset angle formed by the positioning line and the positive direction of the X axis is According to the angle complementarity, it can be easily proved that the size of the first offset angle is consistent with the size of the angle between the line connecting the coordinate points on the positioning line and the projection points of the line to be scribed and the Y axis; similarly, Figure 6In the example above, the size of the complementary angle of the first offset angle can be easily proved based on the principles of parallel lines, complementary angles and complementarity. The size of the angle between the connecting line between each coordinate point on the positioning line and the projection point of the line to be scribed and the Y axis is consistent.

[0063] Specifically, obtaining the third distance parameter of each coordinate point on the positioning line relative to the second coordinate origin includes: In the second coordinate system, obtaining the distance between each coordinate point on the positioning line and the second coordinate origin to obtain a fourth distance parameter; A third distance parameter is obtained based on the fourth distance parameter and the first offset angle.

[0064] Furthermore, the third distance parameter includes a fifth projection distance in the first direction and a sixth projection distance in the second direction; The third distance parameter is:

[0065] in, is the third distance parameter, , are the fifth projection value and the sixth projection value respectively; Fourth distance parameter The calculation formula is:

[0066] in, is the coordinate point on the positioning line, , are the coordinate values ​​of the coordinate point on the positioning line on the X-axis and Y-axis in the second coordinate system respectively; when When the fifth projection value and the sixth projection value The calculation formula is:

[0067]

[0068] when When the fifth projection value and the sixth projection value The calculation formula is:

[0069]

[0070] in, is the first offset angle.

[0071] Specifically, the second coordinate parameter The calculation formula is:

[0072] in, The coordinate point on the positioning line The corresponding projection point on the line to be inscribed is , , as well as The positive or negative value of depends on the position of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin.

[0073] See also Figure 3 As shown, taking a solar cell whose left side is lower than the right side of a glass layer as an example, the positioning method of this embodiment is used to position the scribed line, and the following positioning process is obtained: First, Point is used as the second coordinate origin to control the center point of the positioning camera to be located on the positioning line. Point, to establish a second coordinate system, where the magnitude of the first offset angle between the positioning line and the positive direction of the first direction is , . Then in order to locate the line The corresponding projection point of the point on the line to be inscribed For example, calculate the first distance parameter , the second distance parameter And the third distance parameter .

[0074] Among them, the first distance parameter for:

[0075] See also Figure 4 As shown, Figure 4 for Figure 3 The enlarged image of P1 in the figure shows the second distance parameter obtained by calculation. for:

[0076] See also Figure 5 As shown, Figure 5 for Figure 3 The enlarged image of P2 in the figure shows the third distance parameter obtained by calculation. for:

[0077] in, for Point to The distance of the point, The calculation formula is:

[0078] in, , The coordinate points The values ​​on the X-axis and Y-axis in the second coordinate system.

[0079] because Point relative to Point is located The left side of the point gives the final point The second coordinate parameter is:

[0080] Based on this, the coordinates of each projection point on the line to be scribed can be calculated one by one, and finally the line to be scribed can be obtained.

[0081] See also Figure 6 As shown, taking a solar cell whose left side is higher than the right side of a glass layer as an example, the positioning method of this embodiment is used to position the scribed line, and the following positioning process is obtained: Still Point is used as the second coordinate origin to control the center point of the positioning camera and The points coincide with each other, thereby establishing a second coordinate system, in which the magnitude of the first offset angle between the positioning line and the positive direction of the first direction is , . In order to find the Projection point of point For example, calculate the first distance parameter , the second distance parameter And the third distance parameter .

[0082] First distance parameter for:

[0083] See also Figure 7 As shown, Figure 7 for Figure 6 The enlarged image of P1 in the figure shows the second distance parameter obtained by calculation. for:

[0084] See also Figure 8 As shown, Figure 8 for Figure 6 The enlarged image of P2 in the figure shows the third distance parameter obtained by calculation. for:

[0085] in, for Point to The distance of the point, The calculation formula is:

[0086] in, , The coordinate points The values ​​on the X-axis and Y-axis in the second coordinate system.

[0087] because Point relative to Point is located The left side of the point gives the final point The second coordinate parameter is:

[0088] Based on this, the coordinates of each projection point on the line to be scribed can be calculated one by one, and finally the line to be scribed can be obtained.

[0089] Furthermore, , , as well as The positive and negative values ​​of can be defined according to the value range of the following coordinate points: Second distance parameter The positive and negative values ​​of are:

[0090]

[0091]

[0092]

[0093]

[0094]

[0095] The third distance parameter The positive and negative values ​​of are:

[0096]

[0097]

[0098]

[0099]

[0100]

[0101]

[0102]

[0103] Combined with the second distance parameter and the third distance parameter The value of can be used to calculate the second coordinate parameter of the projection point corresponding to each coordinate point on the positioning line on the line to be engraved relative to the first rectangular coordinate system .

[0104] The present invention also discloses a system for positioning a line to be scribed for laser scribing of a solar cell, which works based on the positioning method described above.

[0105] The present invention also discloses another system for positioning a line to be scribed for laser scribing of a solar cell, which includes one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the program includes instructions for executing the positioning method as described above. The processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, for executing related programs to implement the functions required to be performed by the modules in the positioning system of the embodiment of the present application, or to perform the positioning method of the method embodiment of the present application.

[0106] The present invention also discloses a computer-readable storage medium, which includes a computer program, and the computer program can be executed by a processor to complete the positioning method as described above. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. The available medium can be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a magnetic disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD).

[0107] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A method for positioning a line to be scribed for laser scribing of a solar cell, characterized in that: include: Taking any point on the machine tool as the first coordinate origin, taking the first direction as the X-axis direction, and taking the second direction perpendicular to the first direction as the Y-axis direction, to establish a first coordinate system; In the first coordinate system, any point on the preset positioning line is taken as the second coordinate origin, the first direction is taken as the X-axis direction, and the second direction is taken as the Y-axis direction to establish a second coordinate system; In the first coordinate system, obtaining the distance between the second coordinate origin and the center point of the laser cutting head to obtain a first distance parameter; In the second coordinate system, based on a preset line spacing between the positioning line and the line to be scribed and a first offset angle of the positioning line relative to the positive direction of the first direction, a second distance parameter representing an offset distance between the positioning line and the line to be scribed is obtained; In the second coordinate system, obtaining a third distance parameter of each coordinate point on the positioning line relative to the second coordinate origin; In the first coordinate system, obtaining the coordinate value of the second coordinate origin to obtain a first coordinate parameter; Based on the first distance parameter, the second distance parameter, the third distance parameter, the first coordinate parameter and the positions of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin, the second coordinate parameters of the projection points corresponding to each coordinate point on the positioning line in the first coordinate system on the line to be engraved are obtained.

2. The method for positioning the line to be scribed for laser scribing of solar cells according to claim 1, characterized in that: The first distance parameter includes a first projection distance of the distance between the second coordinate origin and the center point of the laser cutting head in the first direction and a second projection distance in the second direction; The first distance parameter is: in, is the first distance parameter, , are the first projection distance and the second projection distance respectively; The first projection distance and the second projection distance The calculation formula is: in, , are the coordinate values ​​of the center point of the laser cutting head on the X-axis and Y-axis in the first coordinate system, respectively, , are respectively the coordinate values ​​of the second coordinate origin on the X-axis and the Y-axis in the first coordinate system.

3. The method for positioning a line to be scribed for laser scribing of a solar cell according to claim 1, characterized in that: The second distance parameter includes a third projection distance in the first direction and a fourth projection distance in the second direction; The second distance parameter is: in, is the second distance parameter, , are the third projection distance and the fourth projection distance respectively; when When the third projection distance and the fourth projection distance The calculation formula is: when When the third projection distance and the fourth projection distance The calculation formula is: in, is the line spacing preset between the positioning line and the line to be scribed, is the first offset angle.

4. The method for positioning a line to be scribed for laser scribing of a solar cell according to claim 1, characterized in that: The step of obtaining a third distance parameter of each coordinate point on the positioning line relative to the second coordinate origin includes: In the second coordinate system, obtaining the distance between each coordinate point on the positioning line and the second coordinate origin to obtain a fourth distance parameter; The third distance parameter is obtained based on the fourth distance parameter and the first offset angle.

5. The method for positioning the line to be scribed for laser scribing of solar cells according to claim 4, characterized in that: The third distance parameter includes a fifth projection distance in the first direction and a sixth projection distance in the second direction; The third distance parameter is: in, is the third distance parameter, , are the fifth projection value and the sixth projection value respectively; The fourth distance parameter The calculation formula is: in, is the coordinate point on the positioning line, , are respectively the coordinate values ​​of the coordinate point on the positioning line on the X-axis and the Y-axis in the second coordinate system; when When the fifth projection value and the sixth projection value The calculation formula is: when When the fifth projection value and the sixth projection value The calculation formula is: in, is the first offset angle.

6. The method for positioning the line to be scribed for laser scribing of solar cells according to claims 1 to 5, characterized in that: The second coordinate parameter The calculation formula is: in, is the coordinate point on the positioning line The corresponding projection point on the line to be scribed, , , as well as The positive or negative value of is determined according to the position of each coordinate point on the positioning line in the second coordinate system relative to the second coordinate origin.

7. A system for positioning a line to be scribed for laser scribing of solar cells, characterized in that: The positioning system works based on the method for positioning a line to be scribed for laser scribing of a solar cell as claimed in any one of claims 1 to 6.

8. A system for positioning a line to be scribed for laser scribing of solar cells, characterized in that: include: one or more processors; Memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for executing the method for positioning a line to be scribed for laser scribing of a solar cell as claimed in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The method comprises a computer program, wherein the computer program can be executed by a processor to complete the method for positioning a line to be scribed for laser scribing of a solar cell as claimed in any one of claims 1 to 6.

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