Scraper for improving printing quality of main grid of TOPCon battery

Abstract

The utility model belongs to the technical field of silk-screen printing, and particularly relates to a scraping plate for improving the printing quality of a main grid of a TOPCon battery, which comprises a scraping plate back plate and scraping glue, a triangular bulge is arranged at the contact position of the scraping plate back plate and the scraping glue, and the contact position of the scraping glue and the main grid is subjected to fillet passivation treatment. In the process of printing the main grid of the TOPCon battery, the installation of the scraper backboard is parallel to the main grid, the scraping glue and the main grid form a certain angle, meanwhile, the contact position of the scraping glue and the main grid is subjected to fillet passivation treatment, and it can be guaranteed that slurry filled in the position of the main grid is reserved to the maximum extent; therefore, the printing uniformity is good, and the main grid fluctuating degree is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of screen printing, and particularly relates to a squeegee for improving the printing quality of the main grid of a TOPCon battery. Background Art

[0002] Screen printing is currently the most widely used electrode printing method for TOPCon batteries. TOPCon printing mainly includes four processes, namely the back main grid, the back sub-grid, the front main grid, and the front sub-grid. Currently, there are certain defects in the printing of the main grid. Since the squeegee is completely parallel to the main grid and the contact angle is relatively sharp, the height of the main grid is relatively low, the flatness is poor, which affects the electrical performance, and the printed main grid is prone to broken grid.

[0003] For example, in the screen printing squeegee and screen printing scraper assembly with the patent application number CN202222992616.4, the screen printing squeegee includes a plate body part and a colloid part arranged at one end of one side of the plate body part. The colloid part is provided with a groove matching the main grid line of the solar cell at the end in contact with the screen plate. When performing screen printing, the bottom surface of the groove is parallel to the screen plate. However, the disadvantage of this technical solution is that the squeegee is completely parallel to the main grid and the contact angle is relatively sharp, resulting in a relatively low height of the main grid, poor flatness, affecting the electrical performance, and the printed main grid is prone to broken grid. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a squeegee for improving the printing quality of the main grid of a TOPCon battery to solve the problems in the prior art. The specific technical solutions are as follows:

[0005] A squeegee for improving the printing quality of the main grid of a TOPCon battery includes a squeegee back plate and a rubber blade. A triangular protrusion is provided at the contact position between the squeegee back plate and the rubber blade, and the contact position between the rubber blade and the main grid is subjected to rounded corner passivation treatment.

[0006] Further, the squeegee back plate is made of carbon fiber material, and threaded holes are provided on its upper side.

[0007] Further, the included angle between the squeegee back plate and the rubber blade is between 5° and 20°.

[0008] Further, the passivation angle at the contact position between the rubber blade and the main grid is between R1 and R5.

[0009] Further, the triangular protrusion and the squeegee back plate are integrally formed of carbon fiber material and are adhered to the rubber blade through strong glue.

[0010] Further, the squeegee back plate is fixed to the scraper through the threaded holes provided thereon.

[0011] The advantages of the utility model are as follows:

[0012] Through the provided triangular protrusions, an angle is formed between the squeegee back plate and the squeegee rubber. During the printing process of the main grid of the TOPCon cell, the installation of the squeegee back plate is parallel to the main grid, making the squeegee rubber and the main grid present a certain angle. At the same time, the contact position between the squeegee rubber and the main grid is subjected to rounded corner passivation treatment, which can ensure that the paste filled in the main grid position is retained to the greatest extent, resulting in good printing uniformity and low undulation of the main grid. Description of the Drawings

[0013] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 ;

[0014] Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ;

[0015] Figure 3 Schematic diagram of the overall structure of the present invention Figure 3 ;

[0016] Figure 4 Schematic diagram of the overall structure of the present invention Figure 4 ;

[0017] Explanation of the markings in the figure:

[0018] Squeegee back plate 1; squeegee rubber 2; triangular protrusion 3; contact position 4; threaded hole 5; main grid 6. Detailed implementation manners

[0019] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] Embodiment 1

[0022] As Figures 1-4As shown in the figure, a squeegee for improving the printing quality of the main grid of a TOPCon battery includes a squeegee backplate 1 and a rubber blade 2. A triangular protrusion 3 is provided at the contact position between the squeegee backplate 1 and the rubber blade 2, and the contact position 4 between the rubber blade 2 and the main grid 6 is subjected to rounded corner passivation treatment;

[0023] The working principle of the above technical solution: By setting the triangular protrusion 3, a certain angle is formed between the squeegee backplate 1 and the rubber blade 2. During the printing process of the main grid of the TOPCon battery, the squeegee backplate 1 is installed parallel to the main grid 6, so that the rubber blade 2 and the main grid 6 present a certain angle. At the same time, the contact position 4 between the rubber blade 2 and the main grid 6 is subjected to rounded corner passivation treatment, which can ensure that the paste filled in the main grid 6 is retained to the greatest extent, so that the printing uniformity is good and the undulation of the main grid is low.

[0024] Embodiment 2

[0025] As Figures 1-4 shown, the squeegee backplate 1 is made of carbon fiber material, and a threaded hole 5 is provided on its upper side;

[0026] The working principle of the above technical solution: The squeegee backplate 1 is made of carbon fiber material, which has good high-temperature resistance and corrosion resistance, has a high tensile strength, is not easy to be damaged, and the squeegee backplate 1 can be fixed to the scraper through the threaded hole 5 provided thereon.

[0027] Embodiment 3

[0028] As Figures 1-4 shown, the angle between the squeegee backplate 1 and the rubber blade 2 is between 5° and 20°;

[0029] The passivation angle of the contact position 4 between the rubber blade 2 and the main grid 6 is between R1 and R5;

[0030] The working principle of the above technical solution: The angle between the squeegee backplate 1 and the rubber blade 2 is between 5° and 20°, and the passivation angle of the contact position 4 between the rubber blade 2 and the main grid 6 is between R1 and R5. Within this angle range, it can ensure that the paste filled in the main grid 6 is retained to the greatest extent, so that the printing uniformity is good and the undulation of the main grid is low.

[0031] Embodiment 4

[0032] As Figures 1-4 shown, the triangular protrusion 3 and the squeegee backplate 1 are integrally formed of carbon fiber material and are adhered to the rubber blade 2 through strong glue;

[0033] Working principle of the above technical solution: The triangular protrusion 3 and the squeegee back plate 1 are integrally formed of carbon fiber material, aiming to form a certain angle between the squeegee back plate 1 and the squeegee rubber 2. In the traditional design, the hardness of the squeegee rubber is relatively low and the elasticity is relatively large. The force transmitted from the print head is uniform. Different squeegee rubber thicknesses on both sides will cause uneven stress and poor printing quality. This design overcomes the above problems.

[0034] Embodiment Five

[0035] As Figures 1-4 shown, the squeegee back plate 1 is fixed to the squeegee through the threaded holes 5 provided thereon;

[0036] Working principle of the above technical solution: The squeegee back plate and the squeegee are fixed through the threaded holes 5, which is convenient and fast for installation and replacement.

[0037] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A squeegee for improving the printing quality of the main grid of TOPCon cells, characterized in that, It includes a squeegee backplate (1) and a squeegee rubber (2). A triangular protrusion (3) is provided at the contact position between the squeegee backplate (1) and the squeegee rubber (2). The contact position (4) between the squeegee rubber (2) and the main grid (6) is subjected to rounded corner passivation treatment.

2. The squeegee for improving the main grid printing quality of TOPCon cells according to claim 1, characterized in that, The squeegee backplate (1) is made of carbon fiber material, and a threaded hole (5) is provided on its upper side.

3. A squeegee for improving the printing quality of the main grid of a TOPCon cell according to claim 1, characterized in that, The included angle between the squeegee backplate (1) and the squeegee rubber (2) is between 5° and 20°.

4. A squeegee for improving the printing quality of the main grid of a TOPCon cell according to claim 1, characterized in that, The passivation angle of the contact position (4) between the squeegee rubber (2) and the main grid (6) is between R1 and R5.

5. A squeegee for improving the printing quality of the main grid of a TOPCon cell according to claim 1, characterized in that, The triangular protrusion (3) and the squeegee backplate (1) are integrally formed of carbon fiber material and adhered to the squeegee rubber (2) by strong adhesive.

6. The squeegee for improving the main grid printing quality of TOPCon cells according to claim 2, wherein, The squeegee backplate (1) is fixed to the squeegee through the threaded hole (5) provided thereon.

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