A back contact solar cell printing screen fixing device

Abstract

The utility model relates to solar cell screen plate processing technical field, concretely relates to a back contact solar cell printing screen plate fixing device, including a plurality of setting on the fixed frame of printing machine platform, the upper portion of fixed frame is provided with the adjusting lever for the pressure tight screen version body, the lower portion of adjusting lever is provided with the clamping post of screen version body clamping, solve the problem that the screen version body of existing screen plate fixing mode is easy to slide, improve the stability and reliability of screen plate fixed, improve the production quality of solar cell.

Description

Technical Field

[0001] This utility model relates to the field of solar cell screen printing technology, specifically to a back-contact solar cell printing screen fixing device. Background Technology

[0002] Crystalline silicon solar cells require metal electrodes to transmit the current generated by the cell under illumination to an external circuit. Currently, back-contact solar cells mainly use a combination of screen printing and sintering to prepare the cell electrodes. First, the required metal paste is printed on the back of the cell by screen printing. After drying, it is sintered. During the sintering process, the electrode makes contact with the silicon wafer, forming a current transmission channel and completing the preparation of the metal electrode.

[0003] During the production process, the printing screen needs to be fixed to the printing press. The usual method involves using four screws to secure the screen to the four corresponding holes on the screen frame adapter. The screen frame adapter has a circular positioning hole on each of its two opposite edges. After installing the screen onto the adapter, the adapter is inserted into the printing press's slot and pushed inwards. Once it reaches its limit, the positioning pins automatically drop, inserting into the positioning holes and locking the adapter in place, thus securing the screen to the printing press. Currently, screen fixing relies solely on the engagement of positioning pins on the two printing presses and the positioning holes on the screen frame adapter. Furthermore, the screen frame adapter itself is made of metal and is quite heavy. During prolonged printing, the positioning pins and holes wear down, resulting in poor screen fixing. Additionally, because the orientation is not fixed, the screen vibrates vertically due to its own weight, causing the screen to slide relative to the printing press during printing, leading to pattern misalignment and affecting product quality. Therefore, this proposed improvement solution addresses this issue. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing screen printing plate body being easily moved during processing, and to provide a back contact solar cell printing screen fixing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a back-contact solar cell printing screen fixing device, comprising multiple fixing frames arranged on a printing machine table, wherein the upper part of the fixing frame is provided with an adjusting rod for pressing the screen body, and the lower part of the adjusting rod is provided with a locking post for engaging with the screen body.

[0006] Furthermore, the opposite sides of the fixing frame are configured as openings, and the snap-fit ​​post is disposed on the bottom surface of the fixing frame.

[0007] Furthermore, the adjusting rod is screwed to the upper part of the fixing frame, and the upper part of the adjusting rod is provided with a screw head.

[0008] Furthermore, the bottom of the adjusting rod is provided with an anti-slip pad, the upper part of the anti-slip pad is provided with a connecting rod, and the bottom of the adjusting rod is provided with a connecting cavity for cooperating with the connecting rod.

[0009] Furthermore, the top of the connecting rod is provided with a dome, and a snap ring is provided on the inner wall of the connecting cavity.

[0010] Furthermore, the upper surface of the anti-slip pad is provided with a metal layer, and the bottom surface of the adjusting rod is provided with ball bearings.

[0011] The beneficial effects of this utility model embodiment are as follows: An adjusting rod is provided on the upper part of the fixing frame, and the adjusting rod is connected to the upper part of the fixing frame by a screw connection. A screw head is provided on the upper part of the adjusting rod, facilitating rotation by the operator. A locking post is provided below the adjusting rod to engage with the screen printing plate body. The locking post is located on the bottom surface of the fixing frame. When it is necessary to fix the screen printing plate, the screen printing plate is placed between the fixing frames, so that the side of the screen printing plate body engages with the locking post, initially achieving horizontal positioning of the screen printing plate. An anti-slip pad is provided at the bottom of the adjusting rod, and a connecting rod is provided above the anti-slip pad. A connecting cavity for cooperating with the connecting rod is provided at the bottom of the adjusting rod. The connecting rod has a dome at its top, and a snap-fit ​​ring is installed on the inner wall of the connecting cavity. During use, the dome of the connecting rod enters the connecting cavity to prevent the anti-slip pad at the bottom from falling off. Ball bearings are installed on the bottom surface of the adjusting rod. The metal layer can enhance the structural strength of the upper part of the anti-slip pad, while the ball bearings can reduce the friction between the anti-slip pad and the adjusting rod when the adjusting rod rotates. This prevents the anti-slip pad from rotating relative to the mesh body during operation, reducing damage to the mesh body and making the operation smoother. This solves the problem of easy sliding of the mesh body in the existing mesh fixing method, improves the stability and reliability of mesh fixing, and improves the production quality of solar cells. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of the adjusting rod of this utility model;

[0015] In the diagram: 1. Mesh version body; 2. Fixing frame; 201. Snap-fit ​​post; 3. Adjusting rod; 301. Snap-fit ​​ring; 302. Ball bearing; 4. Anti-slip pad; 401. Metal layer; 402. Connecting rod; 403. Dome. Detailed Implementation

[0016] 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.

[0017] See Figures 1 to 3 This utility model discloses a back-contact solar cell printing screen fixing device, which mainly includes multiple fixing frames 2 set on the printing machine table. These fixing frames 2 are evenly distributed on the printing machine table to provide a stable support structure for fixing the screen body 1. The cross-section of the fixing frame 2 is U-shaped and the opening of the fixing frame 2 has a certain height to facilitate the placement and removal of the screen body 1. Each screen body 1 is stabilized by three or four fixing frames 2 on the printing machine table to ensure printing quality and improve stability.

[0018] An adjusting rod 3 is provided on the upper part of the fixed frame 2. The adjusting rod 3 is connected to the upper part of the fixed frame 2 by a screw connection. The upper part of the adjusting rod 3 is provided with a screw head, which makes it convenient for the operator to rotate the adjusting rod 3 for operation. The adjusting rod 3 can be used to adjust the appropriate height according to the different thicknesses of the screen body 1, thereby improving applicability. Furthermore, the adjusting rod 3 can be used to make fine adjustments according to the actual situation, ensuring the stability of the screen body 1 and facilitating processing.

[0019] Below the adjusting rod 3, there is a locking post 201 that engages with the screen printing plate body 1. The locking post 201 is located on the bottom surface of the fixing frame 2. When it is necessary to fix the screen printing plate, the screen printing plate is placed between the fixing frames 2, so that the side of the screen printing plate body 1 engages with the locking post 201, thus initially achieving the horizontal positioning of the screen printing plate. Furthermore, a groove is provided on the locking post 201 to increase the connection point and improve stability. Compared with the existing positioning pins, the connection area is increased, ensuring lateral stability and improving the performance.

[0020] To further enhance the fixing effect of the screen and prevent it from vibrating vertically and slipping during the rotation of the adjusting rod 3, thus preventing damage to the screen body, an anti-slip pad 4 is provided at the bottom of the adjusting rod 3. A connecting rod 402 is provided above the anti-slip pad 4. A connecting cavity for the connecting rod 402 is provided at the bottom of the adjusting rod 3. A dome 403 is provided at the top of the connecting rod 402. A retaining ring 301 is provided on the inner wall of the connecting cavity. During use, the dome 403 of the connecting rod 402 enters the connecting cavity to prevent the anti-slip pad 4 from falling off. The retaining ring 301 and the dome 403 are press-fitted to connect the anti-slip pad 4 to the bottom of the adjusting rod 3, preventing... The sliding pad 4 effectively increases the friction between the anti-slip pad and the screen. The anti-slip pad 4 is made of rubber, which reduces hard contact during the pressing process, ensures product quality, and increases the upper pressure to prevent the screen from sliding during the printing process. The upper surface of the anti-slip pad 4 is provided with a metal layer 401, and the bottom surface of the adjusting rod 3 is provided with a ball bearing 302. The metal layer 401 can enhance the structural strength of the upper part of the anti-slip pad 4, and the ball bearing 302 can reduce the friction between the anti-slip pad 4 and the adjusting rod 3 when the adjusting rod 3 rotates, so that the anti-slip pad 4 will not rotate relative to the screen body 1 during operation, reducing damage to the screen body and making the operation smoother.

[0021] In actual use, the screen is placed between the fixing frames 2, so that the screen body 1 is engaged with the locking post 201. Then, the operator rotates the screw head of the adjusting rod 3, causing the adjusting rod 3 to move downward, which drives the anti-slip pad 4 to press down and tighten the screen body 1. The anti-slip pad 4 is in close contact with the screen body 1. Relying on its anti-slip performance and firm connection with the adjusting rod 3, it effectively prevents the screen from vibrating and sliding in the vertical direction, ensuring the stability of the screen during the printing process, thereby improving the accuracy of the printed pattern, ensuring the product quality of the back contact solar cell, effectively solving the problem of the screen body 1 being easy to slide in the existing screen fixing method, improving the stability and reliability of screen fixing, and improving the production quality of solar cells.

[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. A back-contact solar cell printing screen fixing device, characterized in that: It includes multiple fixed frames installed on the printing press table. The upper part of the fixed frame is provided with an adjusting rod for pressing the screen printing body, and the lower part of the adjusting rod is provided with a locking post for engaging with the screen printing body.

2. The back-contact solar cell printing screen fixing device according to claim 1, characterized in that: The opposite sides of the fixing frame are set as openings, and the snap-fit ​​post is set on the bottom surface of the fixing frame.

3. The back-contact solar cell printing screen fixing device according to claim 1, characterized in that: The adjusting rod is screwed to the upper part of the fixing frame, and the upper part of the adjusting rod is provided with a screw head.

4. The back-contact solar cell printing screen fixing device according to claim 3, characterized in that: The bottom of the adjusting rod is provided with an anti-slip pad, the upper part of the anti-slip pad is provided with a connecting rod, and the bottom of the adjusting rod is provided with a connecting cavity for cooperating with the connecting rod.

5. The back-contact solar cell printing screen fixing device according to claim 4, characterized in that: The top of the connecting rod is provided with a dome, and the inner wall of the connecting cavity is provided with a snap ring.

6. The back-contact solar cell printing screen fixing device according to claim 4, characterized in that: The upper surface of the anti-slip pad is provided with a metal layer, and the bottom surface of the adjusting rod is provided with ball bearings.

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