A printing method and apparatus for a solar cell, and a computer storage medium

Abstract

The application discloses a printing method and equipment of a solar cell, and a computer storage medium, and relates to the technical field of photovoltaics, wherein the printing method of the solar cell comprises the following steps: obtaining surface image information of the solar cell; obtaining positioning point image information according to the surface image information; and performing printing on the surface of the solar cell according to the positioning point image information, specifically comprising the following steps: if the positioning point image information meets a preset condition, determining position information of the solar cell according to the positioning point image information, and performing printing on the surface of the solar cell by using the position information of the solar cell; and if the positioning point image information does not meet the preset condition, obtaining contour information of the solar cell in the surface image information, determining the position information of the solar cell according to the contour information, and performing printing on the surface of the solar cell by using the position information of the solar cell. The application can reduce the production capacity loss caused by missing printing.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and more specifically, to a method and apparatus for printing solar cells and a computer storage medium. Background Technology

[0002] In the manufacturing process of solar cells, electrode paste can be filled into laser grooves opened on the surface of the solar cell through screen printing to form grid electrodes. This printing method requires high printing precision. Generally, positioning points are formed on the surface of the solar cell using a laser, and these positioning points are used to align the solar cell during screen printing.

[0003] However, if the resulting positioning points are defective, the current printing positioning method is prone to missing prints, which affects the production capacity of solar cells. Summary of the Invention

[0004] In view of this, this application provides a printing method and apparatus for solar cells, as well as a computer storage medium, for reducing production capacity loss caused by printing omissions.

[0005] In one aspect, this application provides a printing method for a solar cell, wherein the surface of the solar cell has positioning points, the theoretical number of which is N, where N is an integer greater than zero;

[0006] The printing methods for solar cells include:

[0007] Obtain surface image information of the solar cell;

[0008] Based on the surface image information, the positioning point image information is obtained;

[0009] Based on the positioning point image information, printing is performed on the surface of the solar cell;

[0010] The printing process on the surface of the solar cell, based on the positioning point image information, includes:

[0011] If the positioning point image information meets the preset conditions, the position information of the solar cell is determined based on the positioning point image information, and the position information of the solar cell is used to print on the surface of the solar cell; if the positioning point image information does not meet the preset conditions, the outline information of the solar cell in the surface image information is obtained, the position information of the solar cell is determined based on the outline information, and the position information of the solar cell is used to print on the surface of the solar cell.

[0012] The positioning point image information includes the number M of positioning points in the surface image information, where M is an integer greater than or equal to zero and less than or equal to N.

[0013] Optionally, where:

[0014] The preset conditions include a first preset condition, which includes: the number M of positioning points in the surface image information is the same as the theoretical number N of positioning points.

[0015] Optionally, where:

[0016] The positioning point image information also includes the position of the positioning point in the surface image information;

[0017] The preset conditions also include a second preset condition, which includes: the number M of positioning points in the surface image information is less than the theoretical number N of positioning points, and the positions of the positioning points in the surface image information satisfy a preset positional relationship.

[0018] If the positioning point image information meets the preset conditions, the position information of the solar cell is determined based on the positioning point image information, and printing is performed on the surface of the solar cell using the position information of the solar cell, including:

[0019] If the positioning point image information meets the second preset condition, the positioning point image information is calculated and completed to obtain the completed positioning point image information. Based on the completed positioning point image information, the position information of the solar cell is determined, and the position information of the solar cell is printed on the surface of the solar cell.

[0020] The completed image information includes supplementary positioning points. The difference between the theoretical number of positioning points N and the number of positioning points M in the surface image information is the same as the number of supplementary positioning points. The position of the supplementary positioning points in the completed image information is calculated based on the position and number of positioning points in the surface image information.

[0021] Optionally, where:

[0022] When the theoretical number of positioning points N is 4, under ideal conditions, the line connecting the four positioning points on the surface of the solar cell forms a rectangle.

[0023] The preset positional relationship includes: at least two positioning points are located on the diagonal of a rectangle in the surface image information.

[0024] Optionally, where:

[0025] When the positioning point image information meets the second preset condition, and the number M of positioning points in the surface image information is 2 or 3, the positioning point image information is calculated and completed, including:

[0026] Obtain the distance between any two positioning points in the surface image information to determine the location of the supplementary positioning point.

[0027] Optionally, where:

[0028] When the number M of positioning points in the surface image information is 0 or 1, before obtaining the outline information of the solar cell in the surface image information, and after obtaining the positioning point image information based on the surface image information, the solar cell printing positioning method further includes:

[0029] The solar cells are transferred to the cache unit, and the number of solar cells located in the cache unit is counted.

[0030] Optionally, where:

[0031] The contour information of the solar cell includes: the positional information of all sides of the surface of the solar cell; and / or, the positional information of all vertices of the surface of the solar cell.

[0032] Optionally, where:

[0033] If the positioning point image information does not meet the preset conditions, the solar cell printing positioning method also includes:

[0034] Save the surface image information of the current solar cell.

[0035] Secondly, this application also provides a printing apparatus for solar cells, comprising: a processor and a communication interface, the communication interface and the processor being coupled together, the processor being used to run computer programs or instructions to implement the solar cell printing method described in the first aspect.

[0036] Thirdly, this application also provides a computer storage medium storing instructions that, when executed, implement the solar cell printing method described in the first aspect.

[0037] Compared with the prior art, the solar cell printing method and apparatus, and computer storage medium provided in this application achieve at least the following beneficial effects:

[0038] When printing on the surface of a solar cell, the surface image information of the solar cell is first acquired, and positioning point image information is extracted from the acquired surface image information. Then, it is determined whether the obtained positioning point image information meets preset conditions. If the acquired positioning point image information meets the preset conditions, the solar cell can be positioned using the positioning point image information, and then printing can proceed. If the acquired positioning point image information does not meet the preset conditions, the contour information of the solar cell is extracted from the surface image information and used to position the solar cell, and then printing can proceed. In summary, the solar cell printing method provided in this application embodiment can effectively position and print solar cells regardless of whether the acquired positioning point image information meets the preset conditions, reducing production capacity losses caused by missed printing or downtime during the solar cell printing process.

[0039] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time.

[0040] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0042] Figure 1 The diagram shown is a schematic flowchart of the solar cell printing method provided in an embodiment of this application. Detailed Implementation

[0043] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0044] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0046] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0048] In the fabrication of solar cells, electrode paste can be filled into laser-cut grooves on the surface of the solar cell using a screen printing step to form electrodes or a back electric field. This printing method requires high printing precision. Generally, lasers are used to create positioning points (mark points) on the surface of the solar cell, which are then used to align the solar cell during screen printing. For example, lasers can be used to create positioning points when fabricating a selective emitter (SE).

[0049] The current SE printing spot-grabbing mode is a multi-camera 4-point alignment spot-grabbing mode. In this positioning mode, if there are defects in a single point or multiple points formed by SE, printing will not be performed, which will lead to missing printing and affect the production capacity of solar cells.

[0050] To address the aforementioned technical problems, this application proposes a printing method and apparatus for solar cells, as well as a computer storage medium, to reduce production capacity losses caused by printing errors.

[0051] The following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0052] Figure 1 The diagram shown is a schematic flowchart of the solar cell printing method provided in an embodiment of this application.

[0053] like Figure 1 As shown, this application provides a printing method for a solar cell. The surface of the solar cell has positioning points, and the theoretical number of positioning points is N, where N is an integer greater than zero.

[0054] The printing methods for solar cells include:

[0055] S100, acquire surface image information of the solar cell;

[0056] S200: Based on the surface image information, obtain the positioning point image information;

[0057] S300, based on the positioning point image information, prints on the surface of the solar cell;

[0058] The printing process on the surface of the solar cell, based on the positioning point image information, includes:

[0059] If the positioning point image information meets the preset conditions, the position information of the solar cell is determined based on the positioning point image information, and the position information of the solar cell is used to print on the surface of the solar cell; if the positioning point image information does not meet the preset conditions, the outline information of the solar cell in the surface image information is obtained, the position information of the solar cell is determined based on the outline information, and the position information of the solar cell is used to print on the surface of the solar cell.

[0060] The positioning point image information includes the number M of positioning points in the surface image information, where M is an integer greater than or equal to zero and less than or equal to N.

[0061] Based on this, such as Figure 1As shown, the surface of a solar cell is provided with positioning points for alignment, with a theoretical number N. During printing on the solar cell surface, firstly, surface image information of the solar cell is acquired, and positioning point image information is extracted from the acquired surface image information. Then, it is determined whether the obtained positioning point image information meets preset conditions. If the acquired positioning point image information meets the preset conditions, the solar cell can be positioned using the positioning point image information, and then printing can proceed. If the acquired positioning point image information does not meet the preset conditions, the outline information of the solar cell is extracted from the surface image information and used to position the solar cell, and then printing can proceed. The positioning point image information may include the number M of positioning points in the surface image information. Since in actual production, the number M of positioning points in the acquired surface image information may deviate from the theoretical number N, the value of M is an integer greater than or equal to zero and less than or equal to N. In summary, the solar cell printing method provided in this application embodiment can effectively position and print solar cells regardless of whether the obtained positioning point image information matches the preset conditions. It can even print when the positioning points are defective, reducing production capacity losses caused by missing prints or downtime during the solar cell printing process and increasing the output of solar cells.

[0062] In some examples, the theoretical number N of positioning points refers to the number of positioning points that should theoretically be set on the surface of the solar cell. It is an ideal value. In actual production, due to the absence of positioning points during formation, or the positioning points being unclear, too dark, or too bright, the number M of positioning points in the collected surface image information may be different from the theoretical number N of positioning points.

[0063] For example, the theoretical number N of positioning points is not unique and can be a positive integer such as 1, 2, 3, 4, 5, 6, etc. This is just an example and is not specifically limited.

[0064] In some examples, the surface of the solar cell to be printed may include the light-facing side and / or the back-facing side of the solar cell.

[0065] In some examples, the printing performed on the surface of the solar cell includes, but is not limited to, one or more combinations of grid lines, back electrodes, and back electric fields.

[0066] In some examples, the surface image information of the acquired solar cell may include images of the solar cell surface that have been captured.

[0067] For example, the device for acquiring surface image information may include at least one camera. If the positioning points formed on the surface of the solar cell are too dark or too bright, the camera may capture one or more fewer positioning points than the actual number of positioning points on the surface of the solar cell.

[0068] As one possible implementation, the preset conditions include a first preset condition, which includes: the number M of positioning points in the surface image information is the same as the theoretical number N of positioning points.

[0069] Based on this, the preset conditions may include a limit on the number of positioning points. For example, when the number M of positioning points in the surface image information is the same as the theoretical number N of positioning points, it can be determined that the positioning point image information meets the first preset condition. At this time, there is no defect in the number of positioning points, and the position of the solar cell can be determined according to the obtained positioning point image information, so as to achieve effective gripping and positioning of the solar cell, which is conducive to ensuring the subsequent printing accuracy.

[0070] As one possible implementation, the positioning point image information also includes the position of the positioning point in the surface image information;

[0071] The preset conditions also include a second preset condition, which includes: the number M of positioning points in the surface image information is less than the theoretical number N of positioning points, and the positions of the positioning points in the surface image information satisfy a preset positional relationship.

[0072] If the positioning point image information meets the preset conditions, the position information of the solar cell is determined based on the positioning point image information, and printing is performed on the surface of the solar cell using the position information of the solar cell, including:

[0073] If the positioning point image information meets the second preset condition, the positioning point image information is calculated and completed to obtain the completed positioning point image information. Based on the completed positioning point image information, the position information of the solar cell is determined, and the position information of the solar cell is printed on the surface of the solar cell.

[0074] The completed image information includes supplementary positioning points. The difference between the theoretical number of positioning points N and the number of positioning points M in the surface image information is the same as the number of supplementary positioning points. The position of the supplementary positioning points in the completed image information is calculated based on the position and number of positioning points in the surface image information.

[0075] Based on this, the positioning point image information can also include the positions of the positioning points in the surface image information. The preset conditions can also include limitations on the positions of the positioning points. For example, if the number of positioning points in the image information does not meet the first preset condition, but the positions of the positioning points in the surface image information match the preset positional relationship, it can be determined that the positioning point image information meets the second preset condition. In this case, the number of positioning points identifiable from the solar cell surface image information is less than the theoretical number, but the positions of the positioning points in the surface image information meet the preset positional relationship. The positioning point image information can be supplemented based on the number and position of the positioning points in the surface image information, and the supplemented image information can be used to position the solar cell, thus facilitating printing on the solar cell surface. The supplemented image information includes the original positioning point image information and supplementary positioning points, ensuring that the original number M of positioning points plus the number of supplementary positioning points equals the theoretical number N of positioning points. This compensates for the deficiency in the number of positioning points in the surface image information, and the positions of the supplementary positioning points are calculated from the original positioning points, resulting in high accuracy. Therefore, the solar cell printing method provided in this application embodiment can supplement the missing number of positioning points and perform effective point positioning according to the supplemented image information, thereby reducing the production capacity loss caused by missing printing or machine downtime, increasing the output of solar cells, and improving the positioning accuracy, which is conducive to accurate printing in the future.

[0076] As one possible implementation, when the theoretical number of positioning points N is 4, ideally, the line connecting the four positioning points on the surface of the solar cell forms a rectangle.

[0077] The preset positional relationship includes: at least two positioning points are located on the diagonal of a rectangle in the surface image information.

[0078] Based on this, the theoretical number of positioning points can be 4. Ideally, the acquired surface image information should include four positioning points forming a rectangle. However, due to potential deviations in actual production, the number M of acquired positioning points may be less than the theoretical number. For a rectangle, the entire rectangle can be completed using two points located on its diagonal. Therefore, the preset positional relationship when the theoretical number of positioning points is 4 can be set to at least two positioning points in the acquired surface image information located on the diagonal of the rectangle. When the positioning points in the surface image information satisfy the preset positional relationship, even if the number of acquired positioning points is less than the theoretical number, the acquired positioning points can be calculated and supplemented. Using the supplemented four positioning points, a four-point positioning method can be used to locate the solar cell, reducing production capacity losses caused by missing prints or downtime, while improving positioning accuracy and printing accuracy.

[0079] In some examples, when the theoretical number of positioning points is 4, the first preset condition can be understood as the number of positioning points in the surface image information is also 4. If the positioning point image information in the collected surface image information meets the first preset condition, then the four captured positioning points are directly used to perform four-point positioning of the solar cell, confirm the position of the solar cell, and then printing is performed on the surface of the solar cell.

[0080] In some examples, when the positioning point image information meets the second preset condition, and the number M of positioning points in the surface image information is 2 or 3, the calculation and completion of the positioning point image information includes:

[0081] Obtain the distance between any two positioning points in the surface image information to determine the location of the supplementary positioning point.

[0082] Based on this, assuming a theoretical number of four positioning points and, ideally, a rectangle formed by the lines connecting the four positioning points, if the positioning point image information meets the quantity limit and preset positional relationship in the second preset condition—that is, if the number of positioning points in the surface image information is three, or the number of positioning points is two and located on the diagonal of the rectangle—then the obtained positioning point image information can be calculated to determine the position of the supplementary positioning point. The calculation process specifically includes obtaining the distance between any two positioning points in the surface image information and using the obtained distance value to calculate the position of the supplementary positioning point. Taking a surface image with two positioning points as an example, since the two positioning points are located on the diagonal of the rectangle, obtaining the distance between these two positioning points in the surface image information allows calculation of the positions of the remaining two positioning points in the rectangle, which serve as supplementary positioning points. Taking a surface image with three positioning points as an example, in this case, the lines connecting the three positioning points occupy two different sides and one diagonal of the rectangle. Therefore, by obtaining the distance between any two of the three positioning points, the position of the remaining positioning point in the rectangle can be accurately calculated, serving as a supplementary positioning point. The supplementary positioning points and the original positioning points occupy the four vertices of the rectangle, respectively. These four positioning points can then be used to perform four-point positioning of the solar cell, thereby determining the position of the solar cell before printing. This reduces production capacity losses caused by missing prints or downtime, while also improving positioning accuracy, which is beneficial to improving printing accuracy.

[0083] It should be noted that when the theoretical number of positioning points is 4, and ideally the line connecting the four positioning points forms a rectangle, and the number of positioning points in the surface image is 3, the distance between any two positioning points in the surface image refers to arbitrarily combining the three positioning points in pairs and obtaining the distance between the two positioning points in each pair, not just obtaining the distance between a single set of positioning points.

[0084] For example, when the theoretical number of positioning points is 4, ideally, the lines connecting the four positioning points form a rectangle with two adjacent sides, namely the X side and the Y side. When the number of positioning points captured in the surface image is 3, the positions of the supplementary positioning points can be calculated by obtaining the lengths of the X side, the Y side, and the diagonal. For example, the length of the X side can be 180.765cm, the length of the Y side can be 185.25cm, and the length of the diagonal is 228.366cm. This is just an example and is not a specific limitation.

[0085] In some examples, when the theoretical number of positioning points is 4, and ideally the lines connecting the four positioning points form a rectangle, if the number of positioning points in the surface image information is 0, 1, or the number of positioning points is 2 and does not meet the preset positional relationship, it is determined that the positioning point image information does not meet the preset conditions and cannot be supplemented by calculation for four-point positioning. The contour information of the solar cell can be extracted from the surface image information, and the solar cell can be positioned using the contour information before printing.

[0086] In some examples, when the theoretical number of positioning points is 4, ideally the lines connecting the four positioning points form a rectangle. However, if the actual number of positioning points on the surface of the solar cell is less than or equal to 4, but the actual positions of the positioning points on the surface of the solar cell have deviated, making it impossible for the lines connecting the positioning points on the surface of the solar cell to form a rectangle or to obtain a rectangle after direct calculation using diagonal relationships, the positioning points whose positions have deviated will not be captured when acquiring the surface image information of the solar cell. Only the positioning points that can form a rectangle or can be calculated to obtain a rectangle will be captured. Then, it will be determined whether to calculate and supplement to form a four-point positioning or to obtain the outline information of the solar cell for positioning and printing.

[0087] In some examples, in the solar cell printing method provided in this application, the process of identifying and judging whether the positioning point image information meets preset conditions, and if so, which preset condition is met, is performed simultaneously, rather than step by step. For example, when the theoretical number of positioning points is 4, ideally, the line connecting the four positioning points forms a rectangle. The number of positioning points that can be captured can be directly confirmed from the acquired surface image information. If all 4 can be captured, it is equivalent to meeting the first preset condition, and four-point positioning is directly performed. If 3 can be captured, or 2 can be captured and these two positioning points are located on the diagonal of the rectangle, it is equivalent to meeting the second preset condition. The positioning point image information is then calculated and completed before four-point positioning is performed. If 2 positioning points can be captured but these two positioning points are not located on the diagonal of the rectangle, or only 1 or 0 positioning points can be captured, it is equivalent to not meeting the preset condition, and the outline information of the solar cell is acquired for positioning. Thus, in the actual printing and positioning process, the situation can be distinguished directly according to the number of positioning points captured.

[0088] As one possible implementation, the contour information of the solar cell includes: the positional information of all sides of the surface of the solar cell; and / or, the positional information of all vertices of the surface of the solar cell.

[0089] Based on this, the contour information of a solar cell can include one or more of the following: all sides, all vertices, or four corners of the solar cell in the surface image information. If the positioning point image information does not meet the preset conditions, the outer contour of the solar cell can be obtained by capturing its edges. This outer contour can then be used to determine the position of the solar cell, followed by surface printing. This reduces production capacity losses caused by missed printing or downtime, and increases the yield of solar cells.

[0090] As one possible implementation, when the number M of positioning points in the surface image information is 0 or 1, before obtaining the outline information of the solar cell in the surface image information, and after obtaining the positioning point image information based on the surface image information, the solar cell printing positioning method further includes:

[0091] The solar cells are transferred to the cache unit, and the number of solar cells located in the cache unit is counted.

[0092] Based on this, if the number of positioning points in the surface image information is 0 or 1, and the preset conditions are not met, these solar cells belong to the part that needs to be positioned and printed using contour information. These solar cells can be transferred to the buffer unit for subsequent centralized printing using contour information. The number of solar cells placed in the buffer unit can also be counted to determine the proportion of solar cells requiring contour information positioning among all solar cells requiring positioning printing. A quantity threshold can be set. If the proportion of solar cells in the buffer unit exceeds the threshold, the production line needs to be stopped for analysis and adjustment. The reasons for requiring contour information positioning printing can be identified and optimized to avoid significant loss of solar cell photoelectric efficiency, and this also facilitates subsequent efficiency checks and analysis.

[0093] In some examples, when the positioning point image information does not meet the preset conditions, it can be transferred to the cache unit first, and the number of solar cells in the cache unit can be statistically analyzed and subsequently adjusted and optimized. For example, when the theoretical number of positioning points is 4, and ideally the line connecting the four positioning points forms a rectangle, solar cells with 2 positioning points in the surface image information that do not meet the preset positional relationship can also be transferred to the cache unit for quantity statistics, analysis and adjustment.

[0094] In some examples, if the proportion of solar cells in the cache unit is less than or equal to a threshold, analysis and adjustment can also be performed.

[0095] For example, the set quantity threshold can be 0.05. When the proportion of solar cells in the buffer unit is greater than 0.05, a stop analysis and adjustment are performed. The threshold here is only an example and is not specifically limited. In actual production, it can be adjusted accordingly.

[0096] In some examples, the reasons that require the use of contour information for positioning printing may include problems in the formation of positioning points (e.g., problems in SE dotting), problems in acquiring surface image information or positioning point image information (e.g., problems with camera dotting), etc. These are just examples and are not specific limitations.

[0097] For example, the cache unit can be a storage box; this is just an example and not a specific limitation.

[0098] As one possible implementation, if the positioning point image information does not meet the preset conditions, the solar cell printing positioning method also includes:

[0099] Save the surface image information of the current solar cell.

[0100] Therefore, when the positioning point image information does not meet the preset conditions, the currently acquired surface image information of the solar cell can be saved synchronously for data recording, facilitating analysis and evaluation during subsequent efficiency checks. For example, the surface image information can be analyzed to understand the situation of the acquired surface image information that caused the positioning point image information to fail to meet the preset conditions.

[0101] In some examples, the surface image information of the solar cell can be saved even when the positioning point image information meets the preset conditions, but the number of positioning points in the surface image information is not the same as the theoretical number.

[0102] For example, when the theoretical number of positioning points is 4, and ideally the line connecting the four positioning points forms a rectangle, the surface image information with 3, 2, 1, and 0 positioning points can all be retained.

[0103] For example, after retaining the surface image information, it can be analyzed to determine whether the error occurred when acquiring the surface image information or the positioning point image information. For example, it can be confirmed whether there is a problem with a certain camera's brush point or multiple camera brush points. This is just an example and is not a specific limitation.

[0104] Based on the same inventive concept, this application also provides a solar cell printing apparatus, including: a processor and a communication interface, the communication interface and the processor being coupled, the processor being used to run computer programs or instructions to implement the solar cell printing method described in the above embodiments.

[0105] Compared with the prior art, the beneficial effects of the solar cell printing equipment are the same as those of the solar cell printing method described in the above embodiments, and will not be repeated here.

[0106] Based on the same inventive concept, this application also provides a computer storage medium storing instructions that, when executed, implement the solar cell printing method described in the above embodiments.

[0107] Compared with the prior art, the beneficial effects of the computer storage medium are the same as those of the solar cell printing method described in the above embodiments, and will not be repeated here.

[0108] In summary, the solar cell printing method and apparatus, and computer storage medium provided in this application achieve at least the following beneficial effects:

[0109] When printing on the surface of a solar cell, the surface image information of the solar cell is first acquired, and positioning point image information is extracted from the acquired surface image information. Then, it is determined whether the obtained positioning point image information meets preset conditions. If the acquired positioning point image information meets the preset conditions, the solar cell can be positioned using the positioning point image information, and then printing can proceed. If the acquired positioning point image information does not meet the preset conditions, the contour information of the solar cell is extracted from the surface image information and used to position the solar cell, and then printing can proceed. In summary, the solar cell printing method provided in this application embodiment can effectively position and print solar cells regardless of whether the acquired positioning point image information meets the preset conditions, reducing production capacity losses caused by missed printing or downtime during the solar cell printing process.

[0110] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A method for printing solar cells, characterized in that, The surface of the solar cell has positioning points, and the theoretical number of the positioning points is N, where N is an integer greater than zero. The printing method for the solar cell includes: Obtain surface image information of the solar cell; Based on the surface image information, the positioning point image information is obtained; Printing is performed on the surface of the solar cell based on the positioning point image information; The step of printing on the surface of the solar cell based on the positioning point image information includes: If the positioning point image information meets the preset conditions, the position information of the solar cell is determined based on the positioning point image information, and the position information of the solar cell is used to print on the surface of the solar cell; if the positioning point image information does not meet the preset conditions, the outline information of the solar cell in the surface image information is obtained, the position information of the solar cell is determined based on the outline information, and the position information of the solar cell is used to print on the surface of the solar cell. The positioning point image information includes the number M of the positioning points in the surface image information, where M is an integer greater than or equal to zero and less than or equal to N; When the number M of the positioning points in the surface image information is 0 or 1, before obtaining the outline information of the solar cell in the surface image information, and after obtaining the positioning point image information based on the surface image information, the solar cell is transferred to the cache unit, and the number of solar cells located in the cache unit is counted.

2. The printing method for solar cells according to claim 1, characterized in that, The preset conditions include a first preset condition, which includes: the number M of the positioning points in the surface image information is the same as the theoretical number N of the positioning points.

3. The printing method for solar cells according to claim 1, characterized in that, The positioning point image information also includes the position of the positioning point in the surface image information; The preset conditions also include a second preset condition, which includes: the number M of the positioning points in the surface image information is less than the theoretical number N of the positioning points, and the positions of the positioning points in the surface image information satisfy a preset positional relationship. If the positioning point image information meets preset conditions, determining the position information of the solar cell based on the positioning point image information, and using the position information of the solar cell to print on the surface of the solar cell includes: If the positioning point image information meets the second preset condition, the positioning point image information is calculated and completed to obtain the completed image information of the positioning point. Based on the completed image information of the positioning point, the position information of the solar cell is determined, and the position information of the solar cell is used to print on the surface of the solar cell. The completed image information includes supplementary positioning points. The difference between the theoretical number N of the positioning points and the number M of the positioning points in the surface image information is the same as the number of supplementary positioning points. The position of the supplementary positioning points in the completed image information is calculated based on the position and number of the positioning points in the surface image information.

4. The printing method for solar cells according to claim 3, characterized in that, When the theoretical number N of the positioning points is 4, ideally, the line connecting the four positioning points on the surface of the solar cell forms a rectangle. The preset positional relationship includes: at least two of the positioning points are located on the diagonal of a rectangle in the surface image information.

5. The printing method for solar cells according to claim 4, characterized in that, When the positioning point image information meets the second preset condition, and the number M of the positioning points in the surface image information is 2 or 3, the calculation and completion of the positioning point image information includes: The distance between any two of the positioning points in the surface image information is obtained to determine the position of the supplementary positioning point.

6. The printing method for solar cells according to claim 1, characterized in that, The contour information of the solar cell includes: the position information of all sides of the surface of the solar cell; and / or, the position information of all vertices of the surface of the solar cell.

7. The printing method for solar cells according to claim 1, characterized in that, If the positioning point image information does not meet the preset conditions, the solar cell printing positioning method further includes: Save the surface image information of the solar cell currently described.

8. A printing apparatus for solar cells, characterized in that, include: A processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to run computer programs or instructions to implement the solar cell printing method according to any one of claims 1 to 7.

9. A computer storage medium, characterized in that, The computer storage medium stores instructions that, when executed, implement the solar cell printing method according to any one of claims 1 to 7.

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