Method and device for removing bubbles of mask and insulating ink of photovoltaic cell

Abstract

The photovoltaic cell mask and insulating ink bubble removing device comprises a base, a centrifugal stirring outer shell, a centrifugal stirring inner shell, a recycling tank and a placing tank, the centrifugal stirring outer shell is arranged in the center of the bottom of the base, the centrifugal stirring inner shell is arranged in the centrifugal stirring outer shell, and the recycling tank and the placing tank are arranged on the two sides of the top of the base respectively. The centrifugal stirring inner shell is more stably fixed at the centrifugal stirring outer shell, so that the centrifugal stirring inner shell can perform centrifugal stirring more stably, and according to the method for removing the bubbles in the mask and the insulating ink of the photovoltaic cell, the bubbles in the mask material and the insulating ink can be quickly and efficiently removed through the centrifugal stirring technology, so that the bubbles in the mask material and the insulating ink can be effectively removed. And the uniformity and the quality of the coating are obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic solar cell manufacturing, in particular to a method and a device for removing bubbles from a photovoltaic cell mask and insulating ink. Background Art

[0002] In the manufacturing process of photovoltaic cells, mask materials and insulating inks are widely used in the formation of electrode patterns and the insulation protection of electrodes. However, during the mask printing or insulating ink printing process, bubbles are easily generated due to factors such as the viscosity of the material and the coating method. If these bubbles are not effectively removed, it will lead to uneven coating and even form defects in the subsequent curing process, which will affect the electrical performance and overall efficiency of the battery. Existing bubble removal methods are mostly static defoaming or vacuum treatment, but these methods are time-consuming and inefficient, and it is difficult to meet the needs of large-scale production. Therefore, developing an efficient method for removing bubbles is of great significance to improving the yield and production efficiency of photovoltaic cell manufacturing. Summary of the invention

[0003] The purpose of the present invention is to provide a method and device for removing bubbles from photovoltaic cell masks and insulating inks, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A device for removing photovoltaic cell masks and insulating ink bubbles, comprising a base, a centrifugal stirring outer shell, a recovery tank, a placement tank, and a centrifugal stirring inner shell, wherein the centrifugal stirring outer shell is arranged at the top center of the base, the recovery tank and the placement tank are arranged on both sides of the top of the base, the centrifugal stirring inner shell is arranged inside the centrifugal stirring outer shell, the top of the centrifugal stirring outer shell is arranged with a connecting outer plate, the top of the centrifugal stirring inner shell is arranged with a connecting inner plate, the outer surface of the connecting inner plate is in contact with the inner surface of the connecting outer plate, the inner surface of the connecting outer plate is provided with a second rotating groove, the second rotating groove is snap-fittedly connected with a rotating block, and the inner surface of the rotating block is connected to the centrifugal stirring inner shell;

[0006] A speed regulating motor is fixedly connected to the center of the inner bottom of the centrifugal stirring shell, a connecting shaft is provided at the top output end of the speed regulating motor, the top of the connecting shaft is connected to the bottom of the centrifugal stirring inner shell, a first rotating groove is provided at the bottom of the inner surface of the centrifugal stirring shell, a rotating block is connected in a snap-fitting manner in the first rotating groove, a plurality of connecting plates are provided at the bottom of the outer surface of the centrifugal stirring inner shell, and the bottom of the connecting plate is connected to the rotating block;

[0007] A gear box is provided at the top center of the centrifugal stirring inner shell, and a second synchronous wheel and a first synchronous wheel are respectively provided on both sides of the bottom of the inner surface of the gear box, the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt, the first synchronous wheel and the second synchronous wheel are respectively sleeved on two different rotating shafts, and a stirring shaft is provided at the bottom of the rotating shaft, and the bottom of the stirring shaft passes through the centrifugal stirring outer shell and the gear box and is located at the bottom of the inner surface of the centrifugal stirring inner shell;

[0008] A second connecting tube extends from the bottom of one side of the centrifugal stirring inner shell, and the other end of the second connecting tube passes through the centrifugal stirring outer shell and is connected to the surface of the recovery tank. A first connecting tube extends from the center of the other side of the centrifugal stirring inner shell, and the other end of the first connecting tube passes through the centrifugal stirring outer shell and is connected to the surface of the tank.

[0009] Preferably, the top of the rotating shaft at the second synchronous wheel is connected to the bottom output end of the driving motor, and the driving motor is located inside the gear box.

[0010] Preferably, the surface of the stirring shaft is provided with stirring blades.

[0011] Preferably, a first water pump is disposed on the surface of the first connecting pipe, and a second water pump is disposed on the surface of the second connecting pipe.

[0012] Preferably, a temperature sensor is provided on the surface of the placement tank, and a heating plate is provided on the bottom of the inner surface of the placement tank.

[0013] A method for removing bubbles from a photovoltaic cell mask and insulating ink comprises the following steps:

[0014] Step S1: firstly, the mask material or insulating ink needs to be pre-processed;

[0015] Step S2, then placing the prepared mask material or insulating ink in the centrifugal stirring inner shell;

[0016] Step S3, after the stirring is completed, the bubble-free mask material or insulating ink is subjected to a normal coating or printing process;

[0017] Step S4, drying or curing the coated sample to complete the manufacturing process of the photovoltaic cell.

[0018] Preferably, the specific steps of pre-treating the mask material and the insulating ink in step S1 are as follows:

[0019] Step S11, first pour the mask material or insulating ink into the tank;

[0020] Step S12, then start the heating plate to adjust the temperature of the mask material or the insulating ink to between 20° C. and 30° C.;

[0021] Step S13, after starting the heating plate, keep an eye on the temperature value on the front of the temperature sensor, and when the temperature reaches a certain level, turn off the heating plate;

[0022] Step S14, start the first water pump, and let the mask material or insulating ink pass through the first water pump and the first connecting pipe into the centrifugal stirring inner shell.

[0023] Preferably, the specific steps after stirring the mask material or the insulating ink in step S3 are as follows:

[0024] Step S31, after the mask material or the insulating ink is stirred, the second water pump is started to pass the mask material and the insulating ink through the second water pump and the second connecting pipe into the recovery tank;

[0025] Step S32: The staff takes out the bubble-free mask material or insulating ink inside the recovery tank and transfers the bubble-free mask material or insulating ink to a suitable place;

[0026] Step S33: The staff performs normal coating or printing process on the sample surface using mask material or insulating ink.

[0027] Preferably, when the mask material or the insulating ink is centrifuged, the centrifugal speed is between 500 and 3000 rpm and the centrifugal treatment is performed for 5 to 15 minutes.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The device for removing bubbles from photovoltaic cell masks and insulating ink of the present invention has two stirring shafts arranged inside a centrifugal stirring inner shell. The two stirring shafts make stirring more uniform and are more conducive to removing bubbles.

[0030] The device for removing photovoltaic cell mask and insulating ink bubbles of the present invention connects a centrifugal stirring inner shell to the second rotating groove of a centrifugal stirring outer shell by a rotating block in a snap-fit ​​manner. In addition, a connecting plate is provided at the bottom of the centrifugal stirring inner shell, and a rotating block is provided at the bottom of the connecting plate. The rotating block is snap-fitted to the first rotating groove, so that the centrifugal stirring inner shell can be more stably fixed to the centrifugal stirring outer shell, so that the centrifugal stirring inner shell can rotate more stably and the material inside the centrifugal stirring inner shell can be better centrifuged.

[0031] The method for removing bubbles from mask and insulating ink of photovoltaic cells of the present invention can quickly and efficiently remove bubbles in mask materials and insulating ink through centrifugal stirring technology, significantly improving the uniformity and quality of the coating. After the bubbles are removed, the coating is dense and uniform, and the defects in the coating are reduced, thereby improving the electrical performance and conversion efficiency of the photovoltaic cell. The method is suitable for various types of mask materials and insulating inks, and can meet the needs of different materials by adjusting the centrifugal speed and stirring time. The method has good process adaptability. Compared with the traditional static defoaming or vacuum treatment method, the centrifugal stirring process greatly shortens the time for bubble removal, improves production efficiency, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0034] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 It is a schematic diagram of the steps of the present invention.

[0036] In the figure: 1. base; 2. centrifugal stirring outer shell; 3. recovery tank; 4. placing tank; 5. temperature sensor; 6. first connecting pipe; 7. first water pump; 8. second connecting pipe; 9. centrifugal stirring inner shell; 10. gear box; 11. second water pump; 12. heating plate; 13. first synchronous wheel; 14. synchronous belt; 15. rotating shaft; 16. driving motor; 17. second synchronous wheel; 18. stirring shaft; 19. stirring blade; 20. speed regulating motor; 21. connecting shaft; 22. connecting plate; 23. first rotating groove; 24. rotating block; 25. rotating block; 26. second rotating groove. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 1-3 , the present invention provides a technical solution:

[0041] A device for removing masks and bubbles of insulating ink of photovoltaic cells comprises a base 1, a centrifugal stirring outer shell 2, a recovery tank 3, a placement tank 4, and a centrifugal stirring inner shell 9. The centrifugal stirring outer shell 2 is arranged at the top center of the base 1, the recovery tank 3 and the placement tank 4 are arranged on both sides of the top of the base 1, the centrifugal stirring inner shell 9 is arranged inside the centrifugal stirring outer shell 2, a connecting outer plate is arranged on the top of the centrifugal stirring outer shell 2, a connecting inner plate is arranged on the top of the centrifugal stirring inner shell 9, the outer surface of the connecting inner plate is in contact with the inner surface of the connecting outer plate, a second rotating groove 26 is opened on the inner surface of the connecting outer plate, a rotating block 25 is snap-fittedly connected to the second rotating groove 26, and the inner surface of the rotating block 25 is connected to the centrifugal stirring inner shell 9;

[0042] The present invention connects the centrifugal stirring inner shell 9 to the second rotating groove 26 of the centrifugal stirring outer shell 2 through a rotating block 25 in a snap-fitting manner. In addition, a connecting plate 22 is provided at the bottom of the centrifugal stirring inner shell 9, and a rotating block 24 is provided at the bottom of the connecting plate 22. The rotating block 24 is snap-fitted to the first rotating groove 23, which can more stably fix the centrifugal stirring inner shell 9 on the centrifugal stirring outer shell 2, so that the centrifugal stirring inner shell 9 can rotate more stably, and the internal material of the centrifugal stirring inner shell 9 can be better centrifuged.

[0043] A speed regulating motor 20 is fixedly connected to the center of the inner bottom of the centrifugal stirring outer shell 2, a connecting shaft 21 is provided at the top output end of the speed regulating motor 20, the top of the connecting shaft 21 is connected to the bottom of the centrifugal stirring inner shell 9, a first rotating groove 23 is provided at the bottom of the inner surface of the centrifugal stirring outer shell 2, a rotating block 24 is connected in a snap-fitting manner in the first rotating groove 23, a plurality of connecting plates 22 are provided at the bottom of the outer surface of the centrifugal stirring inner shell 9, and the bottom of the connecting plate 22 is connected to the rotating block 24;

[0044] A gear box 10 is provided at the top center of the centrifugal stirring inner shell 9, and a second synchronous wheel 17 and a first synchronous wheel 13 are respectively provided on both sides of the bottom of the inner surface of the gear box 10, and the first synchronous wheel 13 and the second synchronous wheel 17 are connected by a synchronous belt 14, and the first synchronous wheel 13 and the second synchronous wheel 17 are respectively sleeved at two different rotating shafts 15, and a stirring shaft 18 is provided at the bottom of the rotating shaft 15, and the bottom of the stirring shaft 18 passes through the centrifugal stirring outer shell 2 and the gear box 10 and is located at the bottom of the inner surface of the centrifugal stirring inner shell 9;

[0045] A second connecting tube 8 extends from the bottom of one side of the centrifugal stirring inner shell 9, and the other end of the second connecting tube 8 passes through the centrifugal stirring outer shell 2 and is connected to the surface of the recovery tank 3. A first connecting tube 6 extends from the center of the other side of the centrifugal stirring inner shell 9, and the other end of the first connecting tube 6 passes through the centrifugal stirring outer shell 2 and is connected to the surface of the tank 4.

[0046] Furthermore, the top of the rotating shaft 15 at the second synchronous wheel 17 is connected to the bottom output end of the driving motor 16 , and the driving motor 16 is located inside the gear box 10 .

[0047] Furthermore, a stirring blade 19 is disposed on the surface of the stirring shaft 18 .

[0048] Furthermore, a first water pump 7 is disposed on the surface of the first connecting pipe 6 , and a second water pump 11 is disposed on the surface of the second connecting pipe 8 .

[0049] Furthermore, a temperature sensor 5 is disposed on the surface of the tank 4 , and a heating plate 12 is disposed on the bottom of the inner surface of the tank 4 .

[0050] Specifically, the centrifugal stirring device of the present invention is composed of a centrifugal stirring outer shell 2 and a centrifugal stirring inner shell 9. During use, the centrifugal stirring inner shell 9 can be rotated by the speed regulating motor 20, so that the mask material or insulating ink inside the centrifugal stirring inner shell 9 is centrifuged. When the speed regulating motor 20 is started, the drive motor 16 will also be started. The rotation of the drive motor 16 will rotate the rotating shaft 15, and the rotation of the rotating shaft 15 will rotate the stirring shaft 18. The rotation of the stirring shaft 18 will stir the mask material or insulating ink. At the same time, the rotation of the rotating shaft 15 will rotate the second synchronous wheel 17, and the rotation of the second synchronous wheel 17 will rotate the first synchronous wheel 13 through the synchronous belt 14. The rotation of the first synchronous wheel 13 will rotate the other rotating shaft 15, thereby rotating the other stirring shaft 18. The present invention uses two stirring shafts 15 to make the stirring more uniform, which is more conducive to removing bubbles.

[0051] It should be noted that the speed regulating motor 20 is an existing mature technology, and the working principle and specific structure of the device will not be described in detail here. Considering that an appropriate centrifugal speed needs to be set according to the characteristics of the material, the speed regulating motor 20 can solve this problem.

[0052] It is worth noting that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0053] Working Principle:.

[0054] See also Figure 4 , the present invention provides a technical solution:

[0055] A method for removing bubbles from a photovoltaic cell mask and insulating ink comprises the following steps:

[0056] Step S1: firstly, the mask material or insulating ink needs to be pre-processed;

[0057] Step S2, then placing the prepared mask material or insulating ink in the centrifugal stirring inner shell 9;

[0058] Step S3: After the stirring is completed, the bubble-free mask material or insulating ink is subjected to a normal coating or printing process. After coating, a secondary centrifugal treatment at a low speed and for a short time can be selectively performed to further ensure the uniformity of the coating;

[0059] Step S4, drying or curing the coated sample to complete the manufacturing process of the photovoltaic cell.

[0060] Furthermore, the specific steps of pre-treating the mask material and the insulating ink in step S1 are as follows:

[0061] Step S11, first pour the mask material or insulating ink into the placement tank 4;

[0062] Step S12, then start the heating plate 12, adjust the temperature of the mask material or the insulating ink to between 20°C and 30°C to optimize the fluidity of the material and facilitate the release of bubbles. For high-viscosity materials, a diluent may be appropriately added to reduce the viscosity and promote the discharge of bubbles;

[0063] Step S13, after starting the heating plate 12, keep an eye on the temperature value on the front of the temperature sensor 5, and when the temperature reaches a certain level, turn off the heating plate 12;

[0064] Step S14 , start the first water pump 7 , and allow the mask material or insulating ink to pass through the first water pump 7 and the first connecting pipe 6 into the centrifugal stirring inner shell 9 .

[0065] Furthermore, the specific steps after stirring the mask material or insulating ink in step S3 are as follows:

[0066] Step S31, after the mask material and the insulating ink are stirred, the second water pump 11 is started to pass the mask material and the insulating ink through the second water pump 11 and the second connecting pipe 8 into the recovery tank 3;

[0067] Step S32: The staff takes out the bubble-free mask material or insulating ink located inside the recovery tank 3 and transfers the bubble-free mask material or insulating ink to a suitable place;

[0068] Step S33: The staff performs normal coating or printing process on the sample surface using mask material or insulating ink.

[0069] Furthermore, when the mask material or insulating ink is centrifuged, the centrifugal speed is generally between 500 and 3000 rpm, and an appropriate selection will be set according to the characteristics of the material. The stirring time is adjusted according to the material viscosity and bubble content, and is carried out for 5 to 15 minutes. During the stirring process, the material should be ensured to be evenly distributed to avoid coating defects caused by uneven stirring.

[0070] For particularly stubborn bubble problems, multiple centrifugal stirrings can be performed and adjusted at different centrifugal speeds to ensure that the bubbles are completely discharged.

[0071] Example 1: A high-viscosity photovoltaic cell mask material was placed in a centrifugal stirring device after being allowed to stand at 25°C, and the speed was set to 1500 rpm for 3 minutes. After stirring, the bubbles in the material were completely eliminated, and then screen printing was performed. After coating, the mask layer was uniform and dense without bubble problems, thereby improving the cell process yield.

[0072] Example 2: An insulating ink containing a large number of tiny bubbles was treated by first keeping it in a 30°C environment for 10 minutes to increase fluidity, then initially centrifugally stirring it at 500 rpm for 5 minutes, then increasing the speed to 1000 rpm and continuing stirring for 10 minutes. The treated insulating ink had no bubbles, the cured insulating layer was uniform and smooth after coating, and the electrical performance of the battery was significantly improved.

[0073] In summary, the method for removing bubbles from photovoltaic cell mask and insulating ink of the present invention is simple to operate and highly efficient, and can significantly improve the coating quality and photovoltaic cells.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing bubbles from photovoltaic cell masks and insulating ink, comprising a base (1), a centrifugal stirring outer shell (2), a recovery tank (3), a placing tank (4), and a centrifugal stirring inner shell (9), characterized in that: A centrifugal stirring outer shell (2) is arranged at the top center of the base (1), a recovery tank (3) and a placement tank (4) are arranged on both sides of the top of the base (1), a centrifugal stirring inner shell (9) is arranged inside the centrifugal stirring outer shell (2), a connecting outer plate is arranged on the top of the centrifugal stirring outer shell (2), a connecting inner plate is arranged on the top of the centrifugal stirring inner shell (9), the outer surface of the connecting inner plate is in contact with the inner surface of the connecting outer plate, a second rotating groove (26) is provided on the inner surface of the connecting outer plate, a rotating block (25) is snap-fittedly connected to the second rotating groove (26), and the inner surface of the rotating block (25) is connected to the centrifugal stirring inner shell (9); A speed regulating motor (20) is fixedly connected to the center of the inner bottom of the centrifugal stirring outer shell (2); a connecting shaft (21) is provided at the top output end of the speed regulating motor (20); the top of the connecting shaft (21) is connected to the bottom of the centrifugal stirring inner shell (9); a first rotating groove (23) is provided at the bottom of the inner surface of the centrifugal stirring outer shell (2); a rotating block (24) is snap-fittedly connected in the first rotating groove (23); a plurality of connecting plates (22) are provided at the bottom of the outer surface of the centrifugal stirring inner shell (9); the bottom of the connecting plates (22) is connected to the rotating block (24); A gear box (10) is arranged at the top center of the centrifugal stirring inner shell (9), and a second synchronous wheel (17) and a first synchronous wheel (13) are arranged on both sides of the bottom of the inner surface of the gear box (10), respectively. The first synchronous wheel (13) and the second synchronous wheel (17) are connected by a synchronous belt (14), and the first synchronous wheel (13) and the second synchronous wheel (17) are respectively sleeved on two different rotating shafts (15). A stirring shaft (18) is arranged at the bottom of the rotating shaft (15), and the bottom of the stirring shaft (18) passes through the centrifugal stirring outer shell (2) and the gear box (10) and is located at the bottom of the inner surface of the centrifugal stirring inner shell (9); A second connecting tube (8) extends from the bottom of one side of the centrifugal stirring inner shell (9), and the other end of the second connecting tube (8) passes through the centrifugal stirring outer shell (2) and is connected to the surface of the recovery tank (3). A first connecting tube (6) extends from the center of the other side of the centrifugal stirring inner shell (9), and the other end of the first connecting tube (6) passes through the centrifugal stirring outer shell (2) and is connected to the surface of the tank (4).

2. The device for removing bubbles from photovoltaic cell mask and insulating ink according to claim 1, characterized in that: The top of the rotating shaft (15) at the second synchronous wheel (17) is connected to the bottom output end of the driving motor (16), and the driving motor (16) is located inside the gear box (10).

3. The device for removing bubbles from photovoltaic cell mask and insulating ink according to claim 1, characterized in that: A stirring blade (19) is provided on the surface of the stirring shaft (18).

4. The device for removing bubbles from photovoltaic cell mask and insulating ink according to claim 1, characterized in that: A first water pump (7) is arranged on the surface of the first connecting pipe (6), and a second water pump (11) is arranged on the surface of the second connecting pipe (8).

5. The device for removing bubbles from photovoltaic cell mask and insulating ink according to claim 1, characterized in that: A temperature sensor (5) is arranged on the surface of the placement tank (4), and a heating plate (12) is arranged on the bottom of the inner surface of the placement tank (4).

6. A method for removing bubbles from photovoltaic cell masks and insulating inks, characterized in that: The following steps are involved: Step S1: firstly, the mask material or insulating ink needs to be pre-processed; Step S2, then placing the prepared mask material or insulating ink in the centrifugal stirring inner shell (9); Step S3, after the stirring is completed, the bubble-free mask material or insulating ink is subjected to a normal coating or printing process; Step S4, drying or curing the coated sample to complete the manufacturing process of the photovoltaic cell.

7. A method for removing bubbles from photovoltaic cell mask and insulating ink according to claim 6, characterized in that: The specific steps of pre-treating the mask material and the insulating ink in step S1 are as follows: Step S11, first pour the mask material or insulating ink into the placement tank (4); Step S12, then start the heating plate (12) to adjust the temperature of the mask material or the insulating ink to between 20° C. and 30° C.; Step S13, after starting the heating plate (12), keep an eye on the temperature value on the front of the temperature sensor (5), and when the temperature reaches the desired value, turn off the heating plate (12); Step S14, start the first water pump (7), and allow the mask material or insulating ink to pass through the first water pump (7) and the first connecting pipe (6) into the centrifugal stirring inner shell (9).

8. The method for removing bubbles from photovoltaic cell mask and insulating ink according to claim 6, characterized in that: The specific steps after stirring the mask material or insulating ink in step S3 are as follows: Step S31, after the mask material and the insulating ink are stirred, start the second water pump (11), and let the mask material and the insulating ink pass through the second water pump (11) and the second connecting pipe (8) into the recovery tank (3); Step S32: The staff takes out the bubble-free mask material or insulating ink inside the recovery tank (3) and transfers the bubble-free mask material or insulating ink to a suitable place; Step S33: The staff performs normal coating or printing process on the sample surface using mask material or insulating ink.

9. A method for removing bubbles from photovoltaic cell mask and insulating ink according to claim 6, characterized in that: When the mask material or insulating ink is centrifuged, the centrifugation speed is between 500 and 3000 rpm for 5 to 15 minutes.

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