A full opening steel plate for improving unevenness of printing thickness

Abstract

The utility model belongs to battery piece technology field discloses a kind of full opening steel plate for improving printing uneven thick and thin, and full opening steel plate includes steel version frame, auxiliary material layer and steel version body, auxiliary material layer is installed in steel version frame inside, steel version body is installed in auxiliary material layer, steel version body is equipped with the grid line groove of through arrangement, steel version body includes main body layer and auxiliary layer, main body layer is used to contact battery piece, auxiliary layer is set on main body layer, the surface of auxiliary layer away from main body layer is rough surface.The full opening steel plate can make that grid line printing process is smooth, and it will not because grid line thick and thin or grid line node bad frequent wipe board, affect production line efficiency, can make production line operation more smooth, and production efficiency is more efficient.

Description

Technical Field

[0001] This utility model relates to the field of battery cell manufacturing technology, and in particular to a fully open steel plate for improving uneven printing thickness. Background Technology

[0002] Fully open-face steel plates are increasingly widely used in solar cells. From early heterojunction cells to BC cells and Topcon cells, fully open-face steel plates have shown outstanding performance in these fields. With the widespread application, some defects have emerged. Uneven grid line thickness and randomly generated node defects affect the quality of the cells, leading to power efficiency loss in some cells and cell degradation.

[0003] Therefore, there is a need for a new type of fully open steel plate that allows for smooth grid printing without frequent plate rubbing due to grid thickness or poor grid nodes, thus reducing production line efficiency and enabling smoother production line operation and higher production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a fully open steel plate that improves the printing of uneven grid lines. This fully open steel plate can make the grid line printing process smooth and will not cause frequent rubbing due to grid line thickness or poor grid line nodes, which would affect the efficiency of the production line. It can make the production line run more smoothly and the production efficiency more efficient.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model discloses a fully open steel plate for improving uneven printing thickness, including a steel plate frame, an auxiliary material layer, and a steel plate body. The auxiliary material layer is installed inside the steel plate frame, and the steel plate body is installed on the auxiliary material layer. The steel plate body has a through-type grid groove. The steel plate body includes a main layer and an auxiliary layer. The main layer is used to contact the battery cell, and the auxiliary layer is disposed on the main layer. The surface of the auxiliary layer facing away from the main layer is a rough surface.

[0007] In some embodiments, the maximum profile height RZ value of the rough surface is greater than or equal to 1.5 μm.

[0008] In some embodiments, a passivation film is provided on the surface of the auxiliary layer opposite to the main layer, and the passivation film constitutes the rough surface.

[0009] In some embodiments, the surface of the auxiliary layer facing away from the main layer has multiple protrusions or multiple pits.

[0010] In some embodiments, the pit includes at least one of a circular pit, an elliptical pit, a hemispherical pit, or a polygonal pit.

[0011] In some embodiments, the protrusion includes at least one of a circular protrusion, an elliptical protrusion, a hemispherical protrusion, or a polygonal protrusion.

[0012] In some embodiments, the thickness of the main body layer is 15μm-50μm.

[0013] In some embodiments, the thickness of the auxiliary layer is 10 μm-30 μm.

[0014] In some embodiments, the main body layer and the auxiliary layer are integrally formed.

[0015] In some embodiments, the steel plate frame has a plurality of positioning holes, which are spaced apart along the contour of the steel plate frame.

[0016] The beneficial effects of this fully open steel plate for improving uneven printing thickness are as follows: Compared with the grid structure in the prior art, the fully open steel plate of this embodiment eliminates the grid structure that causes the dry slurry to flow. The steel plate body is set as two layers, with the main layer in contact with the battery cell and the auxiliary layer having a rough surface. This solves the problem of uneven printing thickness at the source during use, making the printing process smoother. It avoids frequent plate rubbing due to grid thickness or poor grid nodes, which affects production line efficiency. This allows the production line to run more smoothly and produce more efficiently.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the use of fully open steel plates in existing technology.

[0019] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the structure shown.

[0020] Figure 3 This is a schematic diagram of the structure in the prior art where the grid groove is stretched open;

[0021] Figure 4 This is a schematic diagram of the structure of the fully open steel plate according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating the use of the fully open steel plate according to an embodiment of this utility model;

[0023] Figure 6 yes Figure 5 A cross-sectional view of the structure.

[0024] Figure label:

[0025] 100, Steel frame; 110, Positioning hole; 200, Auxiliary material layer; 300, Steel body; 310, Main body layer; 320, Auxiliary layer; 301, Grid groove; 400, Main body part; 401, Mesh structure; 500, Scraper; 600, Battery cell; 700, Slurry. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] refer to Figures 1-3 As shown, the main body 400 of the existing fully open steel plate is provided with grid grooves 301 and a mesh structure 401. The mesh structure 401 increases the friction of the paste 700 on the fully open steel plate to improve ink application. During long-term printing, a small amount of paste 700 is stored in local positions of the mesh structure 401 and cannot be used in time, causing the paste 700 in that area to dry. During multiple printing processes, under the action of the squeegee 500, the dried paste 700 is carried out of the area where the mesh structure 401 is located by the normally used paste 700 and moves along with the normal paste 700. Some small particles will penetrate down to the grid grooves 301 and be printed on the solar cell 600. Some slightly larger particles will get stuck in the grid grooves 301 and open the grid grooves 301, causing coarse line nodes or uneven thickness in the solar cell 600.

[0030] This utility model discloses a fully open steel plate (hereinafter referred to as a fully open steel plate for ease of description) for improving uneven printing thickness, see reference. Figures 4-6 As shown, the fully open steel plate includes a steel plate frame 100, an auxiliary material layer 200, and a steel plate body 300. The auxiliary material layer 200 is installed inside the steel plate frame 100, and the steel plate body 300 is installed on the auxiliary material layer 200. The steel plate body 300 is provided with a through-type grid groove 301. The steel plate body 300 includes a main layer 310 and an auxiliary layer 320. The main layer 310 is used to contact the battery cell 600, and the auxiliary layer 320 is disposed on the main layer 310. The surface of the auxiliary layer 320 facing away from the main layer 310 is a rough surface. Understandably, compared to the grid structure 401 in the prior art, the fully open steel plate of this embodiment eliminates the grid structure 401 that causes the dry slurry 700 to flow out. The steel plate body 300 is set as two layers, with the main layer 310 in contact with the battery cell 600 and the auxiliary layer 320 having a rough surface. This solves the problem of uneven thickness during use, making the printing process smooth and preventing frequent rubbing due to grid thickness or poor grid nodes, which would affect production line efficiency. This allows the production line to run more smoothly and produce more efficiently.

[0031] In some embodiments, the maximum profile height RZ value of the rough surface is greater than or equal to 1.5 μm. It is understood that setting the maximum profile height RZ value of the rough surface to a range greater than or equal to 1.5 μm can better improve the friction of the paste 700 on the fully open steel plate for better ink application, thereby improving the quality of grid line printing.

[0032] In some embodiments, a passivation film is provided on the surface of the auxiliary layer 320 opposite to the main layer 310, and the passivation film constitutes a rough surface. It is understood that in the actual manufacturing process, forming a passivation mold on the auxiliary layer 320 is a simple and convenient process, which simplifies the manufacturing process of the steel body 300 and reduces the manufacturing cost of the steel body 300.

[0033] In some embodiments, the surface of the auxiliary layer 320 facing away from the main layer 310 has multiple bumps and multiple pits. It is understood that by providing multiple bumps and pits on the surface of the auxiliary layer 320 facing away from the main layer 310, the surface of the auxiliary layer 320 is not a flat surface. This can better increase the friction of the ink 700 on the fully open steel plate, resulting in better ink application and thus improving the quality of grid line printing. It should be noted that the bumps here are not visible to the naked eye, but rather the peaks and troughs on the roughened surface formed after roughening the surface of the auxiliary layer 320.

[0034] In some specific embodiments, the pit includes at least one of circular pits, elliptical pits, hemispherical pits, or polygonal pits. In the embodiments of this utility model, the formation of the pit is selected according to the roughening process. It can be at least one of the regular shapes such as circular pits, elliptical pits, hemispherical pits, or polygonal pits mentioned above, or it can be formed into an irregular shape, which can be adjusted according to actual needs.

[0035] In some specific embodiments, the bumps include at least one of circular bumps, elliptical bumps, hemispherical bumps, or polygonal bumps. In the embodiments of this utility model, the formation of the bumps is selected according to the roughening process. They can be at least one of the regular shapes such as circular bumps, elliptical bumps, hemispherical bumps, or polygonal bumps mentioned above, or they can be formed into irregular shapes, which can be adjusted according to actual conditions.

[0036] In some embodiments, the thickness of the main body layer 310 is 15μm-50μm. Specifically, the thickness of the main body layer 310 can be 15μm, 16μm, 17μm, 18μm, 19μm, 20μm, 21μm, 22μm, 23μm, 24μm, 25μm, 26μm, 27μm, 28μm, 29μm, 30μm, 31μm, 32μm, 33μm, 34μm, 35μm, 36μm, 37μm, 38μm, 39μm, 40μm, 41μm, 42μm, 43μm, 44μm, 45μm, 46μm, 47μm, 48μm, 49μm, or 50μm. Of course, other values ​​within the range of 15μm-50μm can also be selected according to actual needs. Understandably, if the thickness of the main body layer 310 is too small, the strength of the entire open-face steel plate will be low, which will not only affect the quality of grid line printing but also reduce the service life of the entire open-face steel plate. If the thickness of the main body layer 310 is too large, the weight of the entire open-face steel plate will be too large, making it inconvenient to use and transport, and may even damage the solar cell 600. In this embodiment, the thickness of the main body layer 310 is set between 15μm and 50μm, which can ensure the strength of the entire open-face steel plate, ensure the quality of grid line printing, extend the service life of the entire open-face steel plate, control the weight of the open-face steel plate, facilitate use and transportation, and reduce the probability of damaging the solar cell 600.

[0037] In some embodiments, the thickness of the auxiliary layer 320 is 10μm-30μm. Specifically, the thickness of the auxiliary layer 320 can be 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, 16μm, 17μm, 18μm, 19μm, 20μm, 21μm, 22μm, 23μm, 24μm, 25μm, 26μm, 27μm, 28μm, 29μm, or 30μm. Of course, other values ​​within the range of 10μm-30μm can also be selected according to actual needs. Understandably, if the thickness of the auxiliary layer 320 is set too small, the strength of the entire open-face steel plate will be low, which will not only affect the quality of grid line printing but also reduce the service life of the entire open-face steel plate. If the thickness of the auxiliary layer 320 is set too large, the weight of the entire open-face steel plate will be too large, making it inconvenient to use and transport, and may even damage the solar cell 600. In this embodiment, the thickness of the auxiliary layer 320 is set between 15μm and 50μm, which can ensure the strength of the entire open-face steel plate, ensure the quality of grid line printing, extend the service life of the entire open-face steel plate, control the weight of the open-face steel plate, facilitate use and transportation, and reduce the probability of damaging the solar cell 600.

[0038] In some embodiments, the main layer 310 and the auxiliary layer 320 are integrally formed. This facilitates the manufacturing of the entire open-face steel plate, and both the main layer 310 and the auxiliary layer 320 can be made of alloy materials, such as stainless steel, etc.

[0039] In some embodiments, the steel plate frame 100 has a plurality of positioning holes 110, which are distributed at intervals along the contour of the steel plate frame 100, thereby ensuring the consistency of the printing position each time and thus improving the product yield.

[0040] In some embodiments, the steel plate frame 100 is made of high-strength alloy material, which has good rigidity and corrosion resistance, ensuring that the steel plate will not deform during the printing process, thereby improving the product yield.

[0041] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fully open steel plate for improving uneven printing thickness, characterized in that, The system includes a steel frame (100), an auxiliary material layer (200), and a steel body (300). The auxiliary material layer (200) is installed inside the steel frame (100), and the steel body (300) is installed on the auxiliary material layer (200). The steel body (300) has a through-groove (301) for grid lines. The steel body (300) includes a main layer (310) and an auxiliary layer (320). The main layer (310) is used to contact the battery cell (600), and the auxiliary layer (320) is disposed on the main layer (310). The surface of the auxiliary layer (320) facing away from the main layer (310) is a rough surface.

2. The fully open steel plate for improving uneven printing thickness according to claim 1, characterized in that, The maximum height RZ value of the rough surface profile is greater than or equal to 1.5 μm.

3. The fully open steel plate for improving uneven printing thickness according to claim 1, characterized in that, The auxiliary layer (320) has a passivation film on its surface opposite to the main layer (310), and the passivation film constitutes the rough surface.

4. The fully open steel plate for improving uneven printing thickness according to claim 1, characterized in that, The auxiliary layer (320) has multiple protrusions or multiple pits on the surface opposite to the main layer (310).

5. The fully open steel plate for improving uneven printing thickness according to claim 4, characterized in that, The pit includes at least one of the following: circular pit, elliptical pit, hemispherical pit, or polygonal pit.

6. The fully open steel plate for improving uneven printing thickness according to claim 4, characterized in that, The protrusion includes at least one of circular protrusions, elliptical protrusions, hemispherical protrusions, or polygonal protrusions.

7. The fully open steel plate for improving uneven printing thickness according to any one of claims 1-6, characterized in that, The thickness of the main body layer (310) is 15μm-50μm.

8. The fully open steel plate for improving uneven printing thickness according to any one of claims 1-6, characterized in that, The thickness of the auxiliary layer (320) is 10μm-30μm.

9. The fully open steel plate for improving uneven printing thickness according to any one of claims 1-6, characterized in that, The main layer (310) and the auxiliary layer (320) are integrally formed structures.

10. The fully open steel plate for improving uneven printing thickness according to any one of claims 1-6, characterized in that, The steel plate frame (100) has a plurality of positioning holes (110), which are spaced apart along the contour of the steel plate frame (100).

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