Solar cell screen printing device

Abstract

The utility model relates to a solar cell screen printing device which comprises a scraper, a screen printing plate, a detection assembly and a moving mechanism, the screen printing plate is located below the scraper, the detection assembly is used for detecting the height of the scraper relative to the screen printing plate, and the moving mechanism is connected with the scraper. The moving mechanism is used for driving the scraper to move relative to the screen according to the scraper height detected by the detection assembly. According to the solar cell screen printing device, due to the fact that the moving mechanism can drive the scraper to move relative to the screen according to the height, detected by the detection assembly, of the screen, the situation that the scraper descends to make contact with the screen and impacts the screen is avoided, and then the probability that printed grid lines jet ink is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic, in particular to a solar cell screen printing device. BACKGROUND

[0002] In the production process of solar cells, there is a process of printing electrodes on the cell sheet by screen printing. When printing electrodes on the cell sheet, if the area where there is no paste originally on the edge of the grid line of the cell sheet is attached with paste, it will increase the light absorption on the surface of the cell, and reduce the light for photoelectric conversion operation, thereby causing the current to be too low and affecting the cell efficiency; moreover, if the area where there is no paste originally on the edge of the grid line of the cell sheet is attached with paste, it will also make the appearance of the grid line of the cell sheet very poor, resulting in irregular arrangement of the grid line of the cell sheet.

[0003] In the related art, in the screen printing process, the squeegee is lowered to contact the screen, and the paste is squeezed into the opening of the screen by relative movement of the screen, so that the paste is attached to the silicon wafer of the cell sheet through the opening of the screen, then the screen is separated from the cell sheet, and the paste attached to the silicon wafer will form the electrode of the cell sheet.

[0004] However, in the related art, when the squeegee is lowered to contact the screen, it will cause impact on the screen, resulting in inkjet phenomenon of the printed grid line, and then causing the area where there is no paste originally on the edge of the grid line of the cell sheet to be attached with paste. UTILITY MODEL CONTENT

[0005] Therefore, a solar cell screen printing device is provided to solve the problem of how to reduce the probability of inkjet phenomenon.

[0006] The present application provides a solar cell screen printing device, which comprises:

[0007] a squeegee;

[0008] a screen located below the squeegee;

[0009] a detection assembly for detecting the height of the squeegee relative to the screen;

[0010] a moving mechanism connected to the squeegee, the moving mechanism being used to drive the squeegee to move relative to the screen according to the height of the squeegee detected by the detection assembly.

[0011] In one of the embodiments, the moving mechanism comprises a lifting mechanism and a translation mechanism, the translation mechanism is connected with the lifting mechanism, the squeegee is arranged in one of the lifting mechanism and the translation mechanism, the lifting mechanism is used to drive the squeegee to move up and down relative to the screen, and the translation mechanism is used to drive the squeegee to move in translation above the screen.

[0012] In one of the embodiments, the solar cell screen printing device further comprises a control circuit board, the control circuit board comprises a main board, a first controller and a second controller, the first controller and the second controller are arranged on the main board and are electrically connected with the detection assembly through a circuit in the main board, the first controller can independently control the lifting mechanism to drive the squeegee to move in vertical direction relative to the screen, and the second controller can independently control the translation mechanism to drive the squeegee to move in translation above the screen.

[0013] In one of the embodiments, the main board is provided with a heat sink, the heat sink comprises a housing and a fan, the housing is provided with an air inlet, a first air outlet and a second air outlet, the fan is arranged in a space enclosed by the housing, the fan is used to suck air through the air inlet and discharge air through the first air outlet and the second air outlet, the first air outlet is opposite to the first controller, and the second air outlet is opposite to the second controller.

[0014] In one of the embodiments, the housing comprises a first wall and a second wall, the first wall and the second wall are oppositely arranged in a direction parallel to the main board, the first wall is located between the fan and the first controller, and the first air outlet is located on the first wall; the second wall is located between the fan and the second controller, and the second air outlet is located on the second wall.

[0015] In one of the embodiments, the fan is electrically connected with the main board, and when at least one of the first controller and the second controller works, the main board controls the fan to start.

[0016] In one of the embodiments, the housing further comprises a third wall, the third wall is connected between the first wall and the second wall, and the third wall is arranged in parallel with the main board, the fan is located between the third wall and the main board, and the air inlet is located on the third wall.

[0017] In one of the embodiments, the first air outlet and the second air outlet are arranged side by side on the same side wall of the shell, the heat sink further comprises a partition plate and a driving mechanism, the partition plate is movably connected with the side wall of the shell, one end of the partition plate at least partially blocks the first air outlet and the other end at least partially blocks the second air outlet, the main board is provided with a first temperature sensor and a second temperature sensor, the first temperature sensor is used for detecting the temperature of the first controller, the second temperature sensor is used for detecting the temperature of the second controller, the driving mechanism, the first temperature sensor and the second temperature sensor are electrically connected with the main board, the main board can control the driving mechanism to drive the partition plate to move relative to the shell according to the temperatures detected by the first temperature sensor and the second temperature sensor, so that the partition plate adjusts the air outlet quantity of the first air outlet and the second air outlet.

[0018] In one of the embodiments, the heat sink further comprises a first partition plate and a first driving mechanism, the first partition plate is movably connected with the first wall, the main board is provided with a first temperature sensor, the first temperature sensor is used for detecting the temperature of the first controller, the first driving mechanism and the first temperature sensor are electrically connected with the main board, the main board can control the first driving mechanism to drive the first partition plate to move relative to the first wall according to the temperature detected by the first temperature sensor, so that the first partition plate adjusts the air outlet quantity of the first air outlet.

[0019] In one of the embodiments, the heat sink further comprises a second partition plate and a second driving mechanism, the second partition plate is movably connected with the second wall, the main board is provided with a second temperature sensor, the second temperature sensor is used for detecting the temperature of the second controller, the second driving mechanism and the second temperature sensor are electrically connected with the main board, the main board can control the second driving mechanism to drive the second partition plate to move relative to the second wall according to the temperature detected by the second temperature sensor, so that the second partition plate adjusts the air outlet quantity of the second air outlet.

[0020] The solar cell screen printing device has the advantages that the moving mechanism can drive the squeegee to move relative to the screen plate according to the height of the screen plate detected by the detection assembly, so that the squeegee is prevented from being lowered to contact the screen plate and impact the screen plate, and the probability of ink jet phenomenon of the grid lines printed by the solar cell screen printing device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0022] Figure 1 The structure schematic diagram of the screen printing device for the solar cell of an embodiment of the present application.

[0023] Figure 2 The structure schematic diagram of the screen printing device for the solar cell of an embodiment of the present application, in which the squeegee is close to the screen.

[0024] Figure 3 The structure schematic diagram of the screen of the screen printing device for the solar cell of an embodiment of the present application.

[0025] Figure 4 The structure schematic diagram of the screen printing device for the solar cell of an embodiment of the present application when printing.

[0026] Figure 5 The top view schematic diagram of the control circuit board and the heat sink in the screen printing device for the solar cell of an embodiment of the present application.

[0027] Figure 6 The structure schematic diagram of the control circuit board and the heat sink in the screen printing device for the solar cell of an embodiment of the present application. Figure 5 The sectional structure schematic diagram of the control circuit board and the heat sink in the screen printing device for the solar cell is shown.

[0028] Figure 7 The top view schematic diagram of the control circuit board and the heat sink in the screen printing device for the solar cell of another embodiment.

[0029] Figure 8 The top view schematic diagram of the control circuit board and the heat sink in the screen printing device for the solar cell of another embodiment.

[0030] Figure 9 The top view schematic diagram of the control circuit board and the heat sink in the screen printing device for the solar cell of another embodiment.

[0031] Explanation of reference signs:

[0032] 100, Solar cell screen printing device; 101, Workbench; 1011, Table top; 10, Scraper; 20, Screen; 21, Opening; 30, Detection assembly; 40, Moving mechanism; 41, Lifting mechanism; 42, Translating mechanism; 421, Motor; 422, Screw rod; 423, Moving seat; 50, Control circuit board; 51, Mainboard; 52, First controller; 53, Second controller; 60, Radiator; 61, Shell; 611, Inlet; 612, First outlet; 613, Second outlet; 614, First wall; 615, Second wall; 616, Third wall; 62, Fan; 63, First partition; 64, First driving mechanism; 65, Second partition; 66, Second driving mechanism; 200, Cell piece; 300, Paste. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0034] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or intervening elements can also be present.

[0035] The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions are used for explanation only and are not intended to be limiting.

[0036] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings and are used only for convenience in describing the present application and simplifying the description, and thus cannot be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be construed as limiting the present application.

[0037] In the embodiments of the present application, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0038] Referring to Figure 1 and Figure 2 As shown in FIGS. 1-2, an embodiment of the present application provides a screen printing device 100 for a solar cell, which includes a squeegee 10, a screen 20, a detection assembly 30, and a moving mechanism 40. The screen 20 is located below the squeegee 10. The detection assembly 30 is configured to detect the height of the squeegee 10 relative to the screen 20. The moving mechanism 40 is connected to the squeegee 10, and is configured to drive the squeegee 10 to move relative to the screen 20 according to the height of the squeegee 10 detected by the detection assembly 30.

[0039] In the embodiments of the present application, the moving mechanism 40 can drive the squeegee 10 to move relative to the screen 20 according to the height of the squeegee 10 detected by the detection assembly 30, so as to avoid the squeegee 10 from descending to contact the screen 20 and impact the screen 20, thereby reducing the probability of ink jetting phenomenon occurring at the printed grid lines.

[0040] Continuing to refer to Figure 1 and Figure 2 As shown in FIGS. 1-2, in some embodiments, the moving mechanism 40 includes a lifting mechanism 41 and a translation mechanism 42. The translation mechanism 42 is connected to the lifting mechanism 41, and the squeegee 10 is disposed in one of the lifting mechanism 41 and the translation mechanism 42. The lifting mechanism 41 is configured to drive the squeegee 10 to move up and down relative to the screen 20, and the translation mechanism 42 is configured to drive the squeegee 10 to move in translation above the screen 20. In this embodiment, the squeegee 10 can not only adjust the height relative to the screen 20 through the up-and-down movement, but also adjust the position of the squeegee 10 above the screen 20 through the translation movement relative to the screen 20. Therefore, the squeegee 10 can take a motion trajectory such as inclined descent relative to the screen 20, or take an arc trajectory when approaching the screen 20, so that the squeegee 10 is gentle when approaching the screen 20, thereby reducing the impact force of the squeegee 10 on the screen 20, reducing the probability of ink jetting phenomenon occurring at the printed grid lines, and reducing the wear of the squeegee 10 on the screen 20, thereby improving the service life of the screen 20.

[0041] The detection assembly 30 includes, but is not limited to, an infrared distance sensor, an ultrasonic sensor, or a laser radar sensor, etc. The type of the detection assembly 30 is not limited herein.

[0042] It should be noted that the detection assembly 30 can be arranged on a squeegee holder for mounting the squeegee 10, or can be arranged on a structure fixed relative to the squeegee 10 in the moving mechanism 40. The mounting position of the detection assembly 30 is not limited herein, as long as the detection assembly 30 can adapt to detecting the height position of the squeegee 10 relative to the screen 20.

[0043] The lifting mechanism 41 includes but is not limited to a telescopic cylinder. The translation mechanism 42 includes but is not limited to a linear motor structure. For example, the translation mechanism 42 includes a motor 421, a screw rod 422, and a moving seat 423, the motor 421 is connected with the screw rod 422, the motor 421 is used to drive the screw rod 422 to rotate, and the screw rod 422 is threadedly connected with the moving seat 423. When the motor 421 drives the screw rod 422 to rotate, the moving seat 423 moves along the screw rod 422.

[0044] In the embodiment in which the lifting mechanism 41 includes the telescopic cylinder, one end of the telescopic cylinder is connected with the moving seat 423, and the other end is connected with the squeegee 10. The screw rod 422 is arranged in a horizontal direction, so that when the moving seat 423 moves along the screw rod 422, the telescopic cylinder and the squeegee 10 are both translated with the moving seat 423. Understandably, since the moving seat 423 moves along the screw rod 422, the height of the moving seat 423 relative to the screen 20 is unchanged. In this embodiment, the telescopic movement of the telescopic cylinder can realize the lifting movement of the squeegee 10 relative to the moving seat 423, so that the squeegee 10 is close to or away from the screen 20 in the vertical direction, thereby adjusting the height of the squeegee 10 relative to the screen 20.

[0045] The structures of the lifting mechanism 41 and the translation mechanism 42 are not limited herein, as long as the combination of the lifting mechanism 41 and the translation mechanism 42 can adapt to the lifting movement and the translation movement of the squeegee 10 relative to the screen 20.

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[0047] In combination Figure 5 As shown in the figure, in some embodiments, the solar cell screen printing device 100 further comprises a control circuit board 50. The control circuit board 50 comprises a main board 51, a first controller 52 and a second controller 53. The first controller 52 and the second controller 53 are both arranged on the main board 51 and are electrically connected with the detection assembly 30 through the circuit in the main board 51. The first controller 52 can independently control the lifting mechanism 41 to drive the squeegee 10 to move in the vertical direction relative to the screen 20, and the second controller 53 can independently control the translation mechanism 42 to drive the squeegee 10 to move in translation above the screen 20. In this embodiment, since the lifting mechanism 41 is independently controlled by the first controller 52, and the translation mechanism 42 is independently controlled by the second controller 53, the lifting mechanism 41 and the translation mechanism 42 adjust the position of the squeegee 10 in two dimensions of the vertical direction and the horizontal direction, respectively, thereby improving the stability of the position adjustment of the squeegee 10, and enabling the squeegee 10 to move more accurately relative to the screen 20, so as to control the quality of the electrodes screen printed on the silicon wafer.

[0048] In combination Figure 5 And Figure 6 As shown in the figure, the main board 51 is provided with a heat sink 60, which is used to dissipate heat of the first controller 52 and the second controller 53, so as to reduce the adverse effects of temperature on the performance of the first controller 52 and the second controller 53, thereby facilitating to maintain the working stability of the first controller 52 and the second controller 53.

[0049] Furthermore, the radiator 60 includes a housing 61 and a fan 62. The housing 61 is provided with an air inlet 611, a first air outlet 612, and a second air outlet 613. The fan 62 is disposed within the space enclosed by the housing 61. The fan 62 is used to draw in air through the air inlet 611 and discharge the air through the first air outlet 612 and the second air outlet 613. When the fan 62 is working, it will drive the air to generate airflow. In this embodiment, when the fan is working, it will create a negative pressure inside the housing 61, so that the air outside the housing 61 enters the housing 61 through the air inlet 611 and is discharged from the first air outlet 612 and the second air outlet 613. Therefore, the air discharged from the first air outlet 612 and the second air outlet 613 will form an airflow, which can be used to dissipate heat from the surrounding structure. For example, the first air outlet 612 is opposite to the first controller 52. Therefore, the airflow generated when the first air outlet 612 discharges air will carry away the heat of the first controller 52, thereby dissipating heat from the first controller 52 and lowering its temperature, which helps maintain the operating temperature of the first controller 52. Correspondingly, the second air outlet 613 is opposite to the second controller 53. Therefore, the airflow generated when the second air outlet 613 discharges air will carry away the heat of the second controller 53, thereby dissipating heat from the second controller 53 and lowering its temperature, which helps maintain the operating temperature of the second controller 53.

[0050] Continue to combine Figure 5 and Figure 6 As shown, in some embodiments, the housing 61 includes a first wall 614 and a second wall 615. The first wall 614 and the second wall 615 are arranged opposite each other in a direction parallel to the main board 51. The first wall 614 is located between the fan 62 and the first controller 52, and the first air outlet 612 is located on the first wall 614. The second wall 615 is located between the fan 62 and the second controller 53, and the second air outlet 613 is located on the second wall 615. In this embodiment, since the first wall 614 and the second wall 615 are arranged opposite each other in a direction parallel to the main board 51, the distance between the first wall 614 and the second wall 615 in the circumferential direction of the fan 62 is large. This helps to reduce the interference between the airflow generated by the first air outlet 612 and the second air outlet 613 when exhausting air, so that the airflow generated by the air exhausted from the first air outlet 612 can stably dissipate heat from the first controller 52. Correspondingly, the airflow generated by the air exhausted from the second air outlet 613 can stably dissipate heat from the second controller 53.

[0051] In some embodiments, the fan 62 is electrically connected with the mainboard 51, and when at least one of the first controller 52 and the second controller 53 is working, the mainboard 51 controls the fan 62 to start. In this embodiment, the mainboard 51 can start the fan 62 according to the actual heat dissipation needs of the first controller 52 and the second controller 53, so as to reduce unnecessary opening of the fan 62 and cause energy waste.

[0052] It should be noted that, as for the shell 61, as long as it can adapt to the assembly needs of the fan 62, and can form corresponding air flow to meet the heat dissipation needs of the first controller 52 and the second controller 53 when the fan 62 is working.

[0053] In some embodiments, the shell 61 further comprises a third wall 616 connected between the first wall 614 and the second wall 615. The third wall 616 is arranged in parallel with the mainboard 51, the fan 62 is located between the third wall 616 and the mainboard 51, and the air inlet 611 is located on the third wall 616. Through this structural arrangement, the third wall 616 can be understood as the top of the shell 61, and therefore, by arranging the air inlet 611 on the third wall 616, the heat dissipation device 60 can realize top air inlet and air outlet from the first air outlet 612 and the second air outlet 613 on both sides, so that the air flow entering the shell 61 can blow to the side of the mainboard 51 facing the shell 61, and therefore, the heat dissipation efficiency of the mainboard 51 can be further improved.

[0054] In combination with Figure 7 As shown in the drawings, in some embodiments, the heat dissipation device 60 further comprises a first partition plate 63 and a first driving mechanism 64. The first partition plate 63 is movably connected to the first wall 614, the mainboard 51 is provided with a first temperature sensor for detecting the temperature of the first controller 52, the first driving mechanism 64 and the first temperature sensor are electrically connected with the mainboard 51, and the mainboard 51 can control the first driving mechanism 64 to drive the first partition plate 63 to move relative to the first wall 614 according to the temperature detected by the first temperature sensor, so that the first partition plate 63 adjusts the air outlet amount of the first air outlet 612.

[0055] In this embodiment, the mainboard 51 controls the first driving mechanism 64 to drive the first partition plate 63 to move relative to the first wall 614, so that the first partition plate 63 changes the shielding area of the first air outlet 612, and then adjusts the air outlet amount of the first air outlet 612 to adapt to the heat dissipation needs of the first controller 52.

[0056] The type of the first driving mechanism 64 is not limited here, as long as the first driving mechanism 64 can meet the needs of driving the first partition plate 63 to move to adjust the air outlet amount of the first air outlet 612. For example, the first driving mechanism 64 includes but is not limited to a telescopic air cylinder or a motor-screw structure.

[0057] In combination Figure 8 As shown in FIG. 6, the heat sink 60 further comprises a second baffle 65 and a second driving mechanism 66. The second baffle 65 is movably connected to the second wall 615. A second temperature sensor is arranged on the main board 51 and used to detect the temperature of the second controller 53. The second driving mechanism 66 and the second temperature sensor are both electrically connected to the main board 51. The main board 51 can control the second driving mechanism 66 to drive the second baffle 65 to move relative to the second wall 615 according to the temperature detected by the second temperature sensor, so that the second baffle 65 adjusts the air outlet amount of the second air outlet 613.

[0058] In this embodiment, the main board 51 controls the second driving mechanism 66 to drive the second baffle 65 to move relative to the second wall 615, so that the second baffle 65 changes the shielding area of the second air outlet 613, and then adjusts the air outlet amount of the second air outlet 613 to adapt to the heat dissipation needs of the second controller 53.

[0059] The type of the second driving mechanism 66 is not limited herein, as long as the second driving mechanism 66 can meet the needs of driving the second baffle 65 to move to adjust the air outlet amount of the second air outlet 613. For example, the second driving mechanism 66 includes but is not limited to a telescopic air cylinder or a motor-screw rod structure.

[0060] It should be noted that in some embodiments, the heat sink 60 comprises the first baffle 63 and the first driving mechanism 64, and comprises the second baffle 65 and the second driving mechanism 66. The arrangement positions and functions of the first baffle 63, the first driving mechanism 64, the second baffle 65 and the second driving mechanism 66 can refer to the above embodiments, which are not limited herein. In this embodiment, the first baffle 63 and the second baffle 65 are independent of each other, so as to adjust the air outlet amount of the corresponding side of the shell 61 according to the heat dissipation needs of the first controller 52 and the second controller 53, i.e., the first baffle 63 can independently adjust the air outlet amount of the first air outlet 612, and the second baffle 65 can independently adjust the air outlet amount of the second air outlet 613.

[0061] It should be noted that the adjustment of the air outlet amount of the first air outlet 612 and the second air outlet 613 is not limited to the above technical solutions.

[0062] For example, in combination Figure 9As shown, in some embodiments, the first air outlet 612 and the second air outlet 613 are arranged side by side on the same side wall of the shell 61. The heat sink 60 further comprises a baffle and a driving mechanism. The baffle is movably connected to the side wall of the shell 61, one end of the baffle at least partially blocks the first air outlet 612, and the other end at least partially blocks the second air outlet 613. The main board 51 is provided with a first temperature sensor and a second temperature sensor, the first temperature sensor is used to detect the temperature of the first controller 52, and the second temperature sensor is used to detect the temperature of the second controller 53. The driving mechanism, the first temperature sensor and the second temperature sensor are electrically connected to the main board 51. The main board 51 can control the driving mechanism to drive the baffle to move relative to the shell 61 according to the temperature detected by the first temperature sensor and the second temperature sensor, so that the baffle adjusts the air volume of the first air outlet 612 and the second air outlet 613. The number of the fan 62 can be 1, 2 or more, which is not limited here.

[0063] It should be noted that, since the baffle is movably connected to the side wall of the shell 61, one end of the baffle at least partially blocks the first air outlet 612, and the other end at least partially blocks the second air outlet 613. Therefore, when the baffle moves relative to the shell 61 to adjust the air volume of the first air outlet 612 and the second air outlet 613, the air volume of one of the first air outlet 612 and the second air outlet 613 becomes smaller, and the air volume of the other becomes larger. Therefore, the main board 51 can reasonably adjust the air volume of the first air outlet 612 and the second air outlet 613 according to the temperature of the first controller 52 and the second controller 53, so as to reasonably distribute the airflow for heat dissipation, and improve the overall heat dissipation performance.

[0064] In some embodiments, when the temperature of the first controller 52 is higher than the temperature of the second controller 53, the heat dissipation requirement of the first controller 52 is more urgent than that of the second controller 53, at this time, the mainboard 51 can control the driving mechanism to drive the partition to move away from the first air outlet 612 and move close to the second air outlet 613, so that the air volume of the first air outlet 612 is increased and the air volume of the second air outlet 613 is reduced, thus the first air outlet 612 can dissipate heat for the first controller 52 with a larger air volume, and the second air outlet 613 dissipates heat for the second controller 53 with a relatively low heat dissipation requirement by reducing the air volume. Correspondingly, when the temperature of the first controller 52 is lower than the temperature of the second controller 53, the heat dissipation requirement of the second controller 53 is more urgent than that of the first controller 52, at this time, the mainboard 51 can control the driving mechanism to drive the partition to move away from the second air outlet 613 and move close to the first air outlet 612, so that the air volume of the second air outlet 613 is increased and the air volume of the first air outlet 612 is reduced, thus the second air outlet 613 can dissipate heat for the second controller 53 with a larger air volume, and the first air outlet 612 dissipates heat for the first controller 52 with a relatively low heat dissipation requirement by reducing the air volume.

[0065] The type of the driving mechanism is not limited here, as long as the driving mechanism can meet the need of driving the partition to move to adjust the air volume of the first air outlet 612 and the second air outlet 613. For example, the driving mechanism includes but is not limited to a telescopic air cylinder or a motor-screw structure.

[0066] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0067] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A solar cell screen printing device (100), characterized by, The solar cell screen printing device (100) comprises: a squeegee (10); a screen (20) located below the squeegee (10); a detection assembly (30) for detecting the height of the squeegee (10) relative to the screen (20); a moving mechanism (40) connected with the squeegee (10), the moving mechanism (40) being used to drive the squeegee (10) to move relative to the screen (20) according to the height of the squeegee (10) detected by the detection assembly (30).

2. The solar cell screen printing apparatus (100) according to claim 1, characterized in that, The moving mechanism (40) comprises a lifting mechanism (41) and a translation mechanism (42), the translation mechanism (42) being connected with the lifting mechanism (41), the squeegee (10) being arranged in one of the lifting mechanism (41) and the translation mechanism (42), the lifting mechanism (41) being used to drive the squeegee (10) to move up and down relative to the screen (20), and the translation mechanism (42) being used to drive the squeegee (10) to move in translation above the screen (20).

3. The solar cell screen printing apparatus (100) according to claim 2, characterized in that, The solar cell screen printing device (100) further comprises a control circuit board (50), the control circuit board (50) comprising a main board (51), a first controller (52) and a second controller (53), the first controller (52) and the second controller (53) being arranged on the main board (51) and being electrically connected with the detection assembly (30) through a circuit in the main board (51), the first controller (52) being capable of independently controlling the lifting mechanism (41) to drive the squeegee (10) to move in the vertical direction relative to the screen (20), and the second controller (53) being capable of independently controlling the translation mechanism (42) to drive the squeegee (10) to move in translation above the screen (20).

4. The solar cell screen printing apparatus (100) according to claim 3, characterized in that, The main board (51) is provided with a heat sink (60), the heat sink (60) comprising a housing (61) and a fan (62), the housing (61) being provided with an air inlet (611), a first air outlet (612) and a second air outlet (613), the fan (62) being arranged in a space enclosed by the housing (61), the fan (62) being used to suck air through the air inlet (611) and discharge the air through the first air outlet (612) and the second air outlet (613), the first air outlet (612) being opposite to the first controller (52), and the second air outlet (613) being opposite to the second controller (53).

5. The solar cell screen printing device (100) according to claim 4, characterized in that The shell (61) comprises a first wall (614) and a second wall (615), the first wall (614) and the second wall (615) are oppositely arranged in a direction parallel to the main board (51), the first wall (614) is located between the fan (62) and the first controller (52), and the first air outlet (612) is located on the first wall (614); the second wall (615) is located between the fan (62) and the second controller (53), and the second air outlet (613) is located on the second wall (615).

6. The solar cell screen printing apparatus (100) according to claim 5, characterized in that The fan (62) is electrically connected with the main board (51), and when at least one of the first controller (52) and the second controller (53) works, the main board (51) controls the fan (62) to start.

7. The solar cell screen printing device (100) according to claim 5 or 6, characterized in that The shell (61) further comprises a third wall (616), the third wall (616) is connected between the first wall (614) and the second wall (615), and the third wall (616) is arranged in parallel with the main board (51), the fan (62) is located between the third wall (616) and the main board (51), and the air inlet (611) is located on the third wall (616).

8. The solar cell screen printing device (100) according to claim 5 or 6, characterized in that The first air outlet (612) and the second air outlet (613) are arranged side by side on the same side wall of the shell (61), the heat dissipation device (60) further comprises a partition plate and a driving mechanism, the partition plate is movably connected with the side wall of the shell (61), one end of the partition plate at least partially covers the first air outlet (612), and the other end of the partition plate at least partially covers the second air outlet (613), the main board (51) is provided with a first temperature sensor and a second temperature sensor, the first temperature sensor is used for detecting the temperature of the first controller (52), and the second temperature sensor is used for detecting the temperature of the second controller (53), the driving mechanism, the first temperature sensor and the second temperature sensor are electrically connected with the main board (51), and the main board (51) can control the driving mechanism to drive the partition plate to move relative to the shell (61) according to the temperatures detected by the first temperature sensor and the second temperature sensor, so that the partition plate adjusts the air outlet quantity of the first air outlet (612) and the second air outlet (613).

9. The solar cell screen printing device (100) according to claim 5 or 6, characterized in that The heat sink (60) further comprises a first partition plate (63) and a first driving mechanism (64), the first partition plate (63) is movably connected to the first wall (614), a first temperature sensor is arranged on the main plate (51), the first temperature sensor is used for detecting the temperature of the first controller (52), the first driving mechanism (64) and the first temperature sensor are electrically connected with the main plate (51), the main plate (51) can control the first driving mechanism (64) to drive the first partition plate (63) to move relative to the first wall (614) according to the temperature detected by the first temperature sensor, so that the first partition plate (63) adjusts the air volume of the first air outlet (612).

10. The solar cell screen printing apparatus (100) according to claim 9, characterized in that The heat sink (60) further comprises a second partition plate (65) and a second driving mechanism (66), the second partition plate (65) is movably connected to the second wall (615), a second temperature sensor is arranged on the main plate (51), the second temperature sensor is used for detecting the temperature of the second controller (53), the second driving mechanism (66) and the second temperature sensor are electrically connected with the main plate (51), the main plate (51) can control the second driving mechanism (66) to drive the second partition plate (65) to move relative to the second wall (615) according to the temperature detected by the second temperature sensor, so that the second partition plate (65) adjusts the air volume of the second air outlet (613).

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