Device for improving utilization rate of dispensing printing uv glue of back contact cell

Abstract

The utility model relates to battery point gum printing technical field, concretely relates to a device of improving back contact battery point gum printing uv glue utilization rate, including printing machine head, the end of printing machine head is provided with scraper frame, the lower part of scraper frame is provided with scraper body, the relative setting of two of scraper body along the printing direction of printing machine head has improved the utilization rate of UV glue greatly, reduced the residual of cement paste, reduced the manufacturing cost that brought because of replacing screen and cement paste, simultaneously, because the generation of micro -bubble has been reduced, the light transmittance of UV glue has been guaranteed, thereby the conversion efficiency of crystalline silicon battery has been improved, guaranteed the product quality.

Description

Technical Field

[0001] This utility model relates to the field of battery dispensing and printing technology, specifically to a device for improving the utilization rate of UV adhesive in dispensing and printing on back-contact batteries. Background Technology

[0002] In recent years, crystalline silicon solar cell technology has developed rapidly, and the efficiency loss caused by the shading of the front grid lines has become increasingly important. The industry has developed a new type of back-contact cell with no front-side shading and is gradually mass-producing it. However, in the mass production of back-contact cells, since there are no grid lines on the front side, the silicon nitride passivation layer on the cell surface is easily scratched when stacked. The current solution to this problem is to use a darkroom environment screen printing method to print high-transmittance UV adhesive on the front side of the cell to provide support and ensure that the cells are properly supported when stacked, thus preventing scratches on the front side of the cells. However, with the current screen printing method, the actual utilization rate of UV adhesive is less than 10%. When the adhesive is spread evenly on the screen, the constant shearing and friction of the squeegee introduces a large number of microbubbles into the adhesive, which reduces the light transmittance and affects the conversion efficiency of crystalline silicon cells. Currently, this can lead to an efficiency reduction of more than 0.5%, and the screen and adhesive must be completely replaced every 3-4 hours, which seriously affects manufacturing costs and product quality. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the low utilization rate of adhesive paste when printing UV adhesive in the back contact battery dispensing process in the prior art, and to provide a device that improves the utilization rate of UV adhesive paste when dispensing back contact batteries.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a device for improving the utilization rate of UV adhesive in dispensing printing for back contact batteries, comprising a printing head, a squeegee holder at the end of the printing head, a squeegee body at the lower part of the squeegee holder, and two squeegee bodies arranged opposite each other along the printing direction of the printing head.

[0005] Furthermore, a feeding device is provided on the upper part of the scraper holder. The feeding device includes a feeding pipe that communicates with the scraper head. A feeding part is provided at the other end of the feeding pipe. The feeding pipe is made of a non-transparent material.

[0006] Furthermore, the feeding unit includes a storage tank, and the discharge end of the storage tank is equipped with a feeding pump, which is connected to the feeding pipe.

[0007] Furthermore, the feeding section includes a storage tank disposed above the scraper frame, and the storage tank is connected to the scraper frame via a feeding pipe.

[0008] Furthermore, the scraper body is inclined.

[0009] The beneficial effects of this embodiment are as follows: During the printing process, two opposing squeegee bodies work together to evenly coat the UV adhesive onto the front of the battery. Because the squeegee bodies are angled, adhesive waste and microbubble generation are effectively reduced. Compared with existing screen printing methods, this device significantly improves the utilization rate of UV adhesive, reduces adhesive residue, and lowers manufacturing costs associated with replacing screens and adhesive. Simultaneously, by reducing microbubble generation, the light transmittance of the UV adhesive is ensured, thereby improving the conversion efficiency of the crystalline silicon battery and guaranteeing product quality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0011] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0012] In the diagram: 1. Printing head; 2. Squeegee holder; 3. Squeegee body; 4. Feed pipe; 5. Storage tank; 6. Feed pump. Detailed Implementation

[0013] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0014] Example 1

[0015] See Figure 1This utility model discloses a device for improving the utilization rate of UV adhesive in dispensing printing for back contact batteries. It mainly includes key components such as a printing head 1, a squeegee holder 2, a squeegee body 3, and a feeding device. The printing head 1 is responsible for coating and provides motion and positioning control for the entire dispensing printing process, ensuring that printing proceeds along a predetermined path and with the required precision. A squeegee holder 2 is located at the end of the printing head 1. The squeegee holder 2 serves as the mounting carrier for the squeegee body 3, and its structural design and installation position play a crucial role in the printing effect. Existing coating technology involves mounting a squeegee body 3 on the squeegee holder 2, allowing coating only in one direction, resulting in a large area of ​​adhesive exposed to air. In this embodiment, the squeegee body 3 is located at the lower part of the squeegee holder 2, and the squeegee body 3 extends along... The printing head 1 has two opposing printing directions. During the printing process, the two opposing squeegee bodies 3 can work together to coat the UV adhesive more evenly. When the squeegee bodies 3 move on the battery surface, they can apply force to the adhesive from different directions, so that the adhesive can be more evenly distributed on the front of the battery, reducing adhesive residue and waste, thereby improving the utilization rate of UV adhesive. The original printing plus ink return method is changed to bidirectional printing. When printing to the left, the printing pressure is mainly applied by the right squeegee to complete the printing. At this time, the left squeegee mainly plays the role of sealing the space. When printing to the right, the roles of the left and right squeegees are reversed, improving the utilization rate of UV adhesive, reducing the contact area between the adhesive and air, ensuring product quality and reducing manufacturing costs.

[0016] Furthermore, the doctor blade body 3 is tilted, with the tilt angle adjusted according to actual printing needs and the characteristics of the adhesive. This tilted design allows for better contact with the printing surface during printing, reducing gaps between the doctor blade and the printing surface and enabling the adhesive to be applied more smoothly to the battery surface. Simultaneously, the tilted design reduces excessive shearing and friction of the adhesive by the doctor blade, lowering the possibility of microbubbles being introduced into the adhesive, ensuring the light transmittance of the UV adhesive, and thus improving the conversion efficiency of the crystalline silicon battery.

[0017] The upper part of the squeegee holder 2 is equipped with a feeding device. The main function of the feeding device is to continuously and stably supply UV adhesive to the squeegee body 3 to ensure the smooth progress of the printing process. The feeding device includes a feeding pipe 4 connected to the squeegee head. The other end of the feeding pipe 4 is equipped with a feeding section. The feeding pipe 4 is made of a non-transparent material. Using a non-transparent material to make the feeding pipe 4 can effectively prevent the UV adhesive from curing or other adverse reactions due to light exposure during the transportation process, ensuring the stability of the UV adhesive performance and thus providing a guarantee for high-quality printing. The feeding section includes a storage tank 5. The discharge end of the storage tank 5 is equipped with a feeding pump 6, which is connected to the feeding pipe 4. In actual operation, the storage tank 5 is used to store a large amount of UV adhesive, and the feeding pump 6 is responsible for transporting the UV adhesive in the storage tank 5 to the squeegee head through the feeding pipe 4. The feed pump 6 can precisely control the amount and speed of UV adhesive delivery according to the actual needs of the printing process, ensuring that the squeegee body 3 always has enough UV adhesive for printing operations, and avoiding the impact on printing quality and UV adhesive utilization rate due to insufficient adhesive supply.

[0018] Example 2

[0019] like Figure 2 The main difference between this embodiment and embodiment 1 is that the storage tank 5 in the feeding section is located above the scraper holder 2. The storage tank 5 and the scraper holder 2 are connected by the feeding pipe 4. The UV adhesive flows from the storage tank 5 into the feeding pipe 4 and then into the scraper head by gravity. This is also applicable to production.

[0020] The storage tank 5 is made of opaque material, and the liquid is supplied by a pressure pump or by gravity, connected by a liquid supply hose. The feeding device pours the adhesive into the cavity between the two squeegees. The squeegees reciprocate to complete two printings, which minimizes the introduction of air. The use of sealed opaque material minimizes the light-blocking problem of UV adhesive without affecting the machine lighting. It is convenient for employees to operate and also reduces the quality change of adhesive due to light exposure caused by employees' operation. The dual-squeegee printing method of this invention can increase the utilization rate of UV adhesive to more than 95%, and the screen life can be increased from the current 20,000 pieces / piece to more than 200,000 pieces / piece, which greatly reduces the manufacturing cost.

[0021] During the printing process, two opposing squeegee bodies 3 work together to evenly coat the UV adhesive onto the front of the battery. Due to the inclined arrangement of the squeegee bodies 3, the waste of adhesive and the generation of microbubbles can be effectively reduced. Compared with existing screen printing methods, this greatly improves the utilization rate of UV adhesive, reduces adhesive residue, and lowers the manufacturing costs caused by replacing screens and adhesive. At the same time, by reducing the generation of microbubbles, the light transmittance of UV adhesive is ensured, thereby improving the conversion efficiency of crystalline silicon cells and ensuring product quality.

[0022] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0025] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An apparatus for improving the utilization rate of UV adhesive in dispensing printing for back-contact batteries, comprising a printing head, characterized in that: The printing head is provided with a squeegee holder at its end, and a squeegee body is provided at the lower part of the squeegee holder. Two squeegee bodies are arranged opposite each other along the printing direction of the printing head.

2. The apparatus for improving the utilization rate of UV adhesive in dispensing and printing on back-contact batteries according to claim 1, characterized in that: The upper part of the scraper holder is provided with a feeding device, which includes a feeding pipe connected to the scraper head. The other end of the feeding pipe is provided with a feeding part. The feeding pipe is made of non-transparent material.

3. The apparatus for improving the utilization rate of UV adhesive for dispensing and printing on back-contact batteries according to claim 2, characterized in that: The feeding section includes a storage tank, and a feeding pump is provided at the discharge end of the storage tank. The feeding pump is connected to the feeding pipe.

4. The apparatus for improving the utilization rate of UV adhesive for dispensing and printing on back-contact batteries according to claim 2, characterized in that: The feeding section includes a storage tank located above the scraper frame, and the storage tank is connected to the scraper frame via a feeding pipe.

5. The apparatus for improving the utilization rate of UV adhesive for dispensing and printing on back-contact batteries according to claim 1, characterized in that: The scraper body is set at an angle.

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