Screen printing apparatus

Abstract

The application relates to a screen printing device. The screen printing device comprises a squeegee, a variable-speed driving device and a control device. The variable-speed driving device is in transmission connection with the squeegee and is used for driving the squeegee to move at variable speed in response to a driving control instruction. The control device is in signal connection with the variable-speed driving device and is used for sending the driving control instruction to the variable-speed driving device so as to control the time for the squeegee to move from a starting printing position to the solar cell to be greater than or equal to the inherent bounce time of the squeegee. The application can ensure the production quality of the solar cell in the production process, so as to avoid the problems of the grid lines being too high at the two corners of the printing edge and the corners being dropped due to the extrusion caused by stacking.

Description

Technical Field

[0001] This application relates to the field of solar cell manufacturing technology, and in particular to a screen printing device. Background Technology

[0002] Currently, solar cell electrodes are generally fabricated using screen printing. Screen printing equipment mainly includes a machine, a screen, and a squeegee. During printing, the ink is first placed on the screen, and then the squeegee scrapes the ink from the screen through the mesh onto the silicon wafer to be printed. However, during production increases, solar cells fabricated using screen printing are prone to problems such as excessively high grid lines at the two corners of the printed edge and corner chipping due to stacking and compression. Utility Model Content

[0003] Based on this, this application provides a screen printing device that can ensure the production quality of solar cells during the production process, so as to avoid problems such as excessively high grid lines at the two corners of the printing edge and corner breakage due to stacking and compression.

[0004] Some embodiments of this application provide a screen printing apparatus including: a squeegee, a variable speed drive device, and a control device. The variable speed drive device is connected to the squeegee via a transmission mechanism and is used to drive the squeegee to move at a variable speed in response to a drive control command. The control device is connected to the variable speed drive device via a signal mechanism and is used to send drive control commands to the variable speed drive device to ensure that the time taken for the squeegee to move from the starting printing position to the solar cell is at least greater than or equal to the inherent jump time of the squeegee.

[0005] In some embodiments of this application, the variable speed drive device includes: an acceleration drive mechanism, a constant speed drive mechanism, and a switching mechanism. The acceleration drive mechanism is driven by a scraper and is used to drive the scraper to move at an accelerated speed from the starting printing position onto the solar cell. The constant speed drive mechanism is driven by the scraper and is used to drive the scraper to move at a constant speed on the solar cell. The switching mechanism is driven by the acceleration drive mechanism and the constant speed drive mechanism and is used to switch between the acceleration drive mechanism and the constant speed drive mechanism in response to drive control commands.

[0006] In other embodiments of this application, the variable speed drive device includes a variable speed motor. The variable speed motor is used to: drive the squeegee to accelerate from the starting printing position to the solar cell, and drive the squeegee to move at a constant speed on the solar cell.

[0007] In some embodiments of this application, the control device includes an acquisition module and a first instruction generation module. The acquisition module is used to acquire the inherent jumping time of the squeegee and the distance the squeegee travels from the starting printing position to the solar cell. The first instruction generation module is connected to the acquisition module and the speed drive device, and is used to generate drive control instructions based on the inherent jumping time of the squeegee and the distance the squeegee travels from the starting printing position to the solar cell.

[0008] In some embodiments of this application, the screen printing apparatus further includes a memory signal-connected to the acquisition module, and an input device signal-connected to the memory. The input device is used to pre-store the inherent jump time of the squeegee into the memory before printing the solar cell. The acquisition module is used to retrieve the inherent jump time from the memory.

[0009] In some embodiments of this application, the inherent jumping time of the scraper is no greater than 120ms.

[0010] In some embodiments of this application, the screen printing equipment further includes a first position sensor and a second position sensor. The first position sensor is disposed at the starting printing position. The second position sensor is disposed at a target position on the machine, the target position coinciding with the edge position of the solar cell adjacent to the starting printing position. The acquisition module is signal-connected to the first and second position sensors and is used to acquire the distance traveled by the squeegee from the starting printing position to the solar cell based on the position information sensed by the first and second position sensors.

[0011] In some embodiments of this application, the screen printing equipment further includes a third position sensor. The third position sensor is disposed on the squeegee. The acquisition module is also connected to the third position sensor and is used to acquire the real-time position of the squeegee based on the position information sensed by the third position sensor.

[0012] Accordingly, the control device also includes a command correction module. The command correction module is connected to the acquisition module, the first command generation module, and the speed drive device, and is used to correct the drive control command according to the real-time position of the scraper, so that the speed drive device drives the scraper in response to the corrected drive control command.

[0013] In some embodiments of this application, the control device includes: a sampling device and a second instruction generation module. The sampling device is connected to the squeegee signal and is used to collect in real time the inherent jump time of the squeegee and the time it takes for the squeegee to move from the starting printing position to the solar cell. The second instruction generation module is connected to the sampling device and the variable speed drive device and is used to generate a variable speed drive instruction corresponding to the current solar cell according to the printing and fabrication sequence of the solar cells, based on the inherent jump time of the previous solar cell and the time it takes for the squeegee to move from the starting printing position to the solar cell.

[0014] In some embodiments of this application, the screen printing equipment further includes a support frame. The support frame is rigidly connected to the squeegee and is also connected to a transmission drive device.

[0015] The embodiments of this application may have, or at least have, the following advantages:

[0016] In this embodiment, without changing the distance between the starting printing position and the solar cell, the control device sends a drive control command to the variable speed drive device. This allows the variable speed drive device to control the time for the scraper to move from the starting printing position to the solar cell to be greater than or equal to the scraper's inherent bounce time. This ensures that the scraper has no inherent bounce phenomenon when it reaches the solar cell, thereby avoiding slurry splashing due to the scraper's inherent bounce. This effectively prevents the problem of excessively high grid lines at the two corners of the solar cell's printing edge, and further avoids the problem of solar cells breaking and chipping due to mutual compression. Therefore, this embodiment can effectively ensure the production quality of solar cells during the production process.

[0017] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a screen printing device provided in some embodiments;

[0020] Figure 2 This is a schematic diagram of another screen printing device provided in some embodiments;

[0021] Figure 3 This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0022] Figure 4 This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0023] Figure 5 This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0024] Figure 6 This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0025] Figure 7 This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0026] Figure 8This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0027] Figure 9 This is a schematic diagram of the structure of yet another screen printing device provided in some embodiments;

[0028] Figure 10 This is a timing diagram of the working process of a screen printing device provided in some embodiments.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Scraper, 20-Speed ​​drive device, 21-Acceleration drive mechanism, 22-Uniform speed drive mechanism, 23-Switching mechanism, 24-Speed ​​motor, 30-Control device, 31-Acquisition module, 32-First instruction generation module, 33-Instruction correction module, 34-Sampling device, 35-Second instruction generation module, 40-Memory, 50-Input device, 61-First position sensor, 62-Second position sensor, 63-Third position sensor, 70-Support frame, A-Start printing position, B-Target position. Detailed Implementation

[0031] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0033] It should be understood that when an element or layer is referred to as being "on," "adjacent to," or "connected to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. It should be understood that although the terms "first," "second," etc., may be used to describe various elements, components, regions, layers, doping types, and / or portions, these elements, components, regions, layers, doping types, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, doping type, or portion from another element, component, region, layer, doping type, or portion. Therefore, without departing from the teachings of this application, the first element, component, region, layer, doping type, or portion discussed below may be referred to as a second element, component, region, layer, or portion.

[0034] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that when the terms “comprise” and / or “comprising” are used in this specification, the presence of the stated feature, integer, step, operation, element, and / or part is established, but the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or groups is not excluded.

[0035] Currently, solar cells manufactured using screen printing technology are prone to problems during production increases, such as excessively high grid lines at the two corners of the printing edge and corner chipping due to stacking and compression. The inventors' research revealed that during the printing process, the squeegee experiences inherent vibration for a fixed period after contacting the machine table. Furthermore, as solar cell production increases and printing speed rises, the time it takes for the squeegee to travel from the initial printing position to the solar cell shortens, causing continued vibration on the squeegee. This inherent vibration leads to ink splashing, resulting in excessively high grid lines at the two corners of the printing edge. Additionally, stacking multiple solar cells easily causes them to break and chip due to mutual compression, and conventional detection methods cannot effectively identify these defects before they occur.

[0036] In some embodiments, increasing the distance between the starting printing position and the edge of the solar cell can avoid the inherent jumping problem when the squeegee moves onto the solar cell, but it will increase the printing time of a single solar cell and the corresponding ink return time, thereby affecting the overall production capacity of the machine.

[0037] In other embodiments, when the squeegee moves onto the solar cell, its speed is first reduced to maintain a low speed to ensure the printing quality of the starting edge of the solar cell, before normal printing is resumed. However, this results in a long deceleration stroke and excessively large deceleration rate, which can severely impact the printing time of a single solar cell, leading to a decrease in output per unit time.

[0038] Based on this, this application provides a screen printing device that can ensure the production quality of solar cells during the production process, so as to avoid problems such as excessively high grid lines at the two corners of the solar cell printing edge and corner breakage due to stacking and compression.

[0039] Please see Figure 1The screen printing equipment provided in some embodiments of this application includes: a squeegee 10, a variable speed drive device 20, and a control device 30. The variable speed drive device 20 is drive-connected to the squeegee 10 and is used to drive the squeegee 10 to move at a variable speed in response to drive control commands. The control device 30 is signal-connected to the variable speed drive device 20 and is used to send drive control commands to the variable speed drive device 20 to ensure that the time taken for the squeegee 10 to move from the starting printing position to the solar cell is greater than or equal to the inherent jumping time of the squeegee 10.

[0040] Here, the starting printing position is a fixed position on the machine table. The squeegee 10 moving to the solar cell means that the squeegee 10 moves to the starting printing edge of the solar cell, i.e., the squeegee 10 coincides with the edge line of the solar cell adjacent to the starting printing position. Furthermore, the solar cells mentioned in this article refer to single-cell cells that can be directly used for printing.

[0041] In this embodiment, without changing the distance between the starting printing position and the solar cell, the control device 30 sends a drive control command to the variable speed drive device 20. This allows the variable speed drive device 20 to control the scraper 10 to move from the starting printing position to the solar cell in a time greater than or equal to the inherent jumping time of the scraper 10. This ensures that the scraper 10 has no inherent jumping phenomenon when it reaches the solar cell, thereby avoiding slurry splashing due to the inherent jumping of the scraper 10. This effectively prevents the problem of excessively high grid lines at the two corners of the solar cell's printing edge, and further avoids the problem of solar cells breaking and chipping due to mutual compression. Therefore, this embodiment can effectively ensure the production quality of solar cells during the production process.

[0042] It is understandable that, without changing the distance between the starting printing position and the solar cell, the time it takes for the squeegee 10 to move from the starting printing position to the solar cell should be greater than or equal to the inherent jumping time of the squeegee 10. This can be achieved by controlling the moving speed of the squeegee 10 during this stage; for example, the squeegee 10 can be controlled to move at an accelerated speed during this stage. Simultaneously, after the squeegee 10 moves onto the solar cell, it can maintain a constant speed in accordance with the increased printing speed of the solar cell. In this way, production efficiency, i.e., the overall machine capacity, can be maximized while ensuring the quality of solar cell production.

[0043] The following examples provide some possible implementations of the transmission drive device 20, but are not limited thereto. Other structures or devices that can achieve the corresponding functions of the transmission drive device 20 may also be used, including but not limited to a gearbox.

[0044] Please see Figure 2In some embodiments of this application, the variable speed drive device 20 includes: an acceleration drive mechanism 21, a constant speed drive mechanism 22, and a switching mechanism 23. The acceleration drive mechanism 21 is driven by the scraper 10 and is used to drive the scraper 10 to accelerate from the starting printing position onto the solar cell. The constant speed drive mechanism 22 is driven by the scraper 10 and is used to drive the scraper 10 to move at a constant speed on the solar cell. The switching mechanism 23 is driven by the acceleration drive mechanism 21 and the constant speed drive mechanism 22 and is used to switch between the acceleration drive mechanism 21 and the constant speed drive mechanism 22 in response to drive control commands.

[0045] In this embodiment, the acceleration drive mechanism 21 and the constant speed drive mechanism 22 can be implemented by different mechanical drive mechanisms, and can be switched by the switching mechanism 23 in response to the drive control command sent by the control device 30 to match the printing cycle of the solar cell.

[0046] Please see Figure 3 In other embodiments of this application, the variable speed drive device 20 includes a variable speed motor 24. The variable speed motor 24 is used to: drive the scraper 10 to accelerate from the starting printing position to the solar cell, and drive the scraper 10 to move at a constant speed on the solar cell.

[0047] In this embodiment, the variable speed drive device 20 is implemented using a variable speed motor 24, which has a simple structure and is easy to implement.

[0048] The following examples provide some possible implementations of the control device 30, but are not limited thereto. Other structures or devices that can achieve the corresponding functions of the control device 30 may also be used.

[0049] Please see Figure 4 In some embodiments of this application, the control device 30 includes an acquisition module 31 and a first instruction generation module 32. The acquisition module 31 is used to acquire the inherent jumping time of the scraper 10 and the distance traveled by the scraper 10 from the starting printing position to the solar cell. The first instruction generation module 32 is connected to the acquisition module 31 and the variable speed drive device 20, and is used to generate drive control instructions based on the inherent jumping time of the scraper 10 and the distance traveled by the scraper 10 from the starting printing position to the solar cell.

[0050] Here, the acquisition module 31 and the first instruction generation module 32 can be implemented using hardware circuits, such as based on application-specific integrated circuits, programmable logic devices or general-purpose processors combined with corresponding logic instructions.

[0051] In this embodiment of the application, the first instruction generation module 32 can perform scraper speed calculation based on the inherent jumping time of the scraper 10 obtained by the acquisition module 31 and the distance the scraper 10 travels from the starting printing position to the solar cell, thereby generating drive control instructions that can be used to control the scraper 10 to accelerate and move at a constant speed in a time-sharing manner.

[0052] Please see Figure 5 In some embodiments of this application, the screen printing apparatus further includes a memory 40 signal-connected to the acquisition module 31, and an input device 50 signal-connected to the memory 40. The input device 50 is used to pre-store the inherent jumping time of the squeegee 10 into the memory 40 before printing to prepare the solar cell. The acquisition module 31 is used to retrieve the inherent jumping time of the squeegee 10 from the memory 40.

[0053] Optionally, the inherent runout time of the scraper 10 is no greater than 120ms, for example, it can be 60ms, 80ms, 90ms, 100ms, 110ms or 120ms. It can be understood that after the scraper 10 is selected for installation, the inherent runout time of the scraper 10 is also determined.

[0054] For example, the input device 50 includes, but is not limited to, electronic devices with information input functions such as keyboards, mice, touch screens, or voice input devices.

[0055] In this embodiment of the application, the inherent jumping time of the squeegee 10 is pre-stored, which enables dedicated control for different squeegees 10 (i.e., the inherent jumping time of squeegees 10 of different materials and specifications can be pre-stored separately, so that the inherent jumping time corresponding to the selected squeegee 10 can be directly called when printing with the selected squeegee 10), thereby improving the efficiency of the control device 30 in generating drive control commands.

[0056] It is understandable that the scraper 10 has different inherent runout times depending on the material and specifications used. Optionally, the scraper 10 can be a rigid scraper, such as a metal scraper with high hardness and strength, which helps to reduce the inherent runout time of the scraper 10.

[0057] Please see Figure 6 In some embodiments of this application, the screen printing equipment further includes a first position sensor 61 and a second position sensor 62. The first position sensor 61 is disposed at the starting printing position. The second position sensor 62 is disposed at a target position on the machine, the target position coinciding with the edge line of the solar cell adjacent to the starting printing position (i.e., the starting printing edge of the solar cell). The acquisition module 31 is signal-connected to the first position sensor 61 and the second position sensor 62, and is used to acquire the distance traveled by the squeegee 10 from the starting printing position to the solar cell based on the position information sensed by the first position sensor 61 and the second position sensor 62.

[0058] Optionally, the first position sensor 61 and the second position sensor 62 have the same sensing accuracy, which helps to ensure the sensing consistency of the position information corresponding to the starting printing position and the target position, thereby ensuring the accuracy of the distance acquired by the acquisition module 31.

[0059] Please see Figure 7 In some embodiments of this application, the screen printing equipment further includes a third position sensor 63. The third position sensor 63 is disposed on the squeegee 10. The acquisition module 31 is also connected to the third position sensor 63 and is used to acquire the real-time position of the squeegee 10 based on the position information sensed by the third position sensor 63.

[0060] Accordingly, the control device 30 also includes an instruction correction module 33. The instruction correction module 33 is connected to the acquisition module 31, the first instruction generation module 32, and the transmission drive device 20, and is used to correct the drive control instruction according to the real-time position of the scraper 10, so that the transmission drive device 20 drives the scraper 10 in response to the corrected drive control instruction.

[0061] Here, the instruction correction module 33 is implemented using hardware circuitry, such as by combining relevant logic instructions with an application-specific integrated circuit, a programmable logic device, or a general-purpose processor.

[0062] In this embodiment, by obtaining the real-time position of the scraper 10 obtained by the acquisition module 31, the drive control command can be corrected in real time according to the distance to be moved from the scraper 10 to the solar cell, so as to adjust the moving speed of the scraper 10 in a timely manner. This allows for more precise control of the time it takes for the scraper 10 to move from the starting printing position to the solar cell, and balances the printing speed of the scraper 10 and the printing time of the solar cell, thereby maximizing production efficiency.

[0063] Please see Figure 8 In some embodiments of this application, the control device 30 includes a sampling device 34 and a second instruction generation module 35. The sampling device 34 is signal-connected to the squeegee 10 and is used to collect in real time the inherent jumping time of the squeegee 10 and the time it takes for the squeegee 10 to move from the starting printing position to the solar cell. The second instruction generation module 35 is connected to the sampling device 34 and the variable speed drive device 20 and is used to generate a variable speed drive instruction corresponding to the current solar cell according to the printing preparation sequence of the solar cells, based on the inherent jumping time corresponding to the previous solar cell and the time it takes for the squeegee 10 to move from the starting printing position to the solar cell.

[0064] Here, both the sampling device 34 and the second instruction generation module 35 can be implemented using hardware circuits, such as based on application-specific integrated circuits, programmable logic devices, or general-purpose processors combined with corresponding logic instructions.

[0065] For example, sampling device 34 includes, but is not limited to, timing detection device.

[0066] In this embodiment, according to the printing and preparation sequence of solar cells, based on the sampling device 34 and the second instruction generation module 35, the variable speed drive instruction corresponding to the current solar cell can be generated according to the inherent jump time of the previous solar cell and the time it takes for the squeegee 10 to move from the starting printing position to the solar cell. This allows for more precise control of the time it takes for the squeegee 10 to move from the starting printing position to the solar cell during mass production of solar cells, and balances the printing speed of the squeegee 10 and the printing time of the solar cell, thereby maximizing production efficiency.

[0067] Please see Figure 9 In some embodiments of this application, the screen printing equipment further includes a support frame 70. The support frame 70 is rigidly connected to the squeegee 10 and is transmissionally connected to the variable speed drive device 20.

[0068] For example, the support frame 70 is a rigid support frame, such as a metal support frame with high hardness and strength.

[0069] In this embodiment, the support frame 70 is rigidly connected to the scraper 10, and the support frame 70 is also connected to the transmission drive device 20, which helps to reduce the inherent jumping time of the scraper 10.

[0070] To more clearly illustrate the screen printing equipment and its working process provided in the embodiments of this application, Figure 10 This diagram illustrates the timing of the operation of a screen printing device.

[0071] Please see Figure 10 The printing cycle T of the solar cell includes: a first time period T1 in which the squeegee 10 moves from the starting printing position A to the solar cell (i.e., the target position B), and a second time period T2 in which the squeegee 10 prints on the solar cell.

[0072] During the first time period T1, the scraper 10 exhibits inherent vibration, for example, from Figure 10 The significant change in the compression of scraper 10 is evident in the scraper compression curve shown. Furthermore, combined with... Figure 10 As shown in the printing speed curve, the squeegee 10 accelerates during the first time period T1.

[0073] Please continue to combine Figure 10As shown in the squeegee compression curve and printing speed curve, after the squeegee 10 moves from the initial printing position A, reaches the inherent jumping time of the squeegee 10, and moves to the target position B, that is, after entering the second time period T2, the change in the compression of the squeegee 10 tends to be gradual, which means that the squeegee 10 has moved smoothly. Thus, it is possible to achieve uniform printing of the squeegee 10 on a single solar cell until the printing is completed, without causing printing defects at the starting edge of the solar cell.

[0074] In the description of this specification, references to terms such as "some embodiments," "some examples," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A screen printing device for printing and preparing solar cells, characterized in that, include: scraper; A variable speed drive device is connected to the scraper drive and is used to drive the scraper to move at a variable speed in response to drive control commands; A control device, signal-connected to the variable speed drive device, is used to send the drive control command to the variable speed drive device to control the time taken for the scraper to move from the starting printing position to the solar cell to be greater than or equal to the inherent jumping time of the scraper.

2. The screen printing equipment according to claim 1, characterized in that, The variable speed drive device includes: An acceleration drive mechanism, connected to the scraper drive, is used to drive the scraper to move rapidly from the starting printing position to the solar cell; A constant speed drive mechanism is connected to the scraper drive and is used to drive the scraper to move at a constant speed on the solar cell; The switching mechanism is connected to the acceleration drive mechanism and the constant speed drive mechanism, and is used to switch between the acceleration drive mechanism and the constant speed drive mechanism in response to the drive control command.

3. The screen printing equipment according to claim 1, characterized in that, The variable speed drive device includes a variable speed motor; The variable speed motor is used to: drive the scraper to move rapidly from the starting printing position to the solar cell, and drive the scraper to move at a constant speed on the solar cell.

4. The screen printing equipment according to any one of claims 1 to 3, characterized in that, The control device includes: The acquisition module is used to acquire the inherent jumping time of the scraper and the distance the scraper travels from the starting printing position to the solar cell; The first instruction generation module, connected to the acquisition module and the variable speed drive device, is used to generate the drive control instruction based on the inherent jumping time of the scraper and the distance the scraper travels from the starting printing position to the solar cell.

5. The screen printing equipment according to claim 4, characterized in that, The screen printing equipment further includes: a memory signal-connected to the acquisition module, and an input device signal-connected to the memory; wherein, The input device is used to pre-store the inherent oscillation time of the squeegee into the memory before printing the solar cell; The acquisition module is used to retrieve the inherent jump time from the memory.

6. The screen printing equipment according to claim 5, characterized in that, The inherent jumping time of the scraper is no more than 120ms.

7. The screen printing equipment according to claim 4, characterized in that, The screen printing equipment also includes: A first position sensor is located at the starting printing position; A second position sensor is disposed at a target position on the machine; the target position coincides with the edge position of the solar cell adjacent to the starting printing position. The acquisition module is connected to the signals of the first position sensor and the second position sensor, and is used to acquire the distance the scraper travels from the starting printing position to the solar cell based on the position information sensed by the first position sensor and the second position sensor.

8. The screen printing equipment according to claim 7, characterized in that, The screen printing equipment also includes: A third position sensor is disposed on the scraper; The acquisition module is also connected to the third position sensor and is used to acquire the real-time position of the scraper based on the position information sensed by the third position sensor. The control device further includes: The instruction correction module, connected to the acquisition module, the first instruction generation module, and the variable speed drive device, is used to correct the drive control instruction according to the real-time position of the scraper, so that the variable speed drive device drives the scraper in response to the corrected drive control instruction.

9. The screen printing equipment according to any one of claims 1 to 3, characterized in that, The control device includes: A sampling device, connected to the scraper signal, is used to collect in real time the inherent jumping time of the scraper and the time it takes for the scraper to move from the starting printing position to the solar cell; The second instruction generation module, connected to the sampling device and the variable speed drive device, is used to generate the variable speed drive instruction corresponding to the current solar cell according to the printing and preparation sequence of the solar cell, based on the inherent jump time corresponding to the previous solar cell and the time it takes for the scraper to move from the starting printing position to the solar cell.

10. The screen printing equipment according to any one of claims 1 to 3, characterized in that, The screen printing equipment also includes: The support frame is rigidly connected to the scraper and is also connected to the transmission drive device.

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