Full-opening steel plate for printing and printing equipment

Abstract

The utility model belongs to the technical field of electrode printing, and discloses a full-opening steel plate for printing and printing equipment. The full-opening steel plate for printing comprises a first metal layer and a second metal layer, and the first metal layer is provided with a printing opening in the first direction; the second metal layer is stacked on one side of the first metal layer, a slurry penetrating opening is formed in the second metal layer in the first direction and penetrates from the slurry coating face to the printing opening, a plurality of connecting parts are arranged in the slurry penetrating opening at intervals in the first direction, the connecting parts are partially hollowed out, and the connecting parts and the first metal layer are arranged at intervals; and a slurry storage cavity is formed between the connecting part and the first metal layer. According to the full-opening steel plate for printing, the locally-hollowed-out connecting part and the slurry storage cavity are used for storing slurry together, so that sufficient slurry is supplied to the printing opening, the situation that gaps are generated in the positions, corresponding to the connecting part, of the fine grids due to insufficient slurry supply is prevented, the printing height of the welding area is effectively controlled, and the printing quality of a battery piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrode printing technology, and in particular to a fully open steel plate for printing and printing equipment. Background Technology

[0002] A fully open steel plate is a steel template specifically designed for high-precision printing processes. Its surface has openings of the same length as the fine grid, allowing paste (such as photovoltaic silver paste) to be efficiently transferred to the surface of the cell through the openings, thus forming a long fine grid on the surface of the cell in one go.

[0003] Because of the numerous long openings, the fully open steel plate has low strength and is prone to deformation. In order to improve the strength of the fully open steel plate, the existing fully open steel plate is designed as a double-layer structure. The lower layer has multiple openings of the same length as the fine grid, while the upper layer has grout leakage holes of the same length as each opening. However, the grout leakage holes are not completely connected. Multiple connecting bridge structures (such as connecting wires) are reserved in the middle of the grout leakage holes to connect the two sides of the grout leakage holes.

[0004] As mentioned above, the addition of connecting bridge structures to the fully open steel plate will obstruct the flow of slurry into the opening. In addition, the poor fluidity of the slurry will cause gaps to appear at the positions of the fine grids corresponding to the connecting bridge structures after printing. Not only can the current in the gap area not be effectively collected, affecting the electrical performance of the solar cell, but hot spot effects may also occur at the gap, which will accelerate the aging of the photovoltaic module and may even burn out the photovoltaic module in severe cases.

[0005] Therefore, the above problems urgently need to be solved. Utility Model Content

[0006] The purpose of this invention is to provide a fully open steel plate and printing equipment for printing, so as to improve printing accuracy while ensuring the strength of the fully open steel plate, and ultimately improve the production quality of battery cells.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A fully open printing plate, the fully open printing plate comprising at least:

[0009] A first metal layer, with printing openings provided along a first direction, the printing openings being used to print an entire fine grid in a single pass; and...

[0010] A second metal layer is superimposed on one side of the first metal layer. The second metal layer has a paste-through port along the first direction. The side of the second metal layer opposite to the first metal layer is a paste-coating surface. The paste-through port extends from the paste-coating surface to the printing port. Multiple connecting parts are spaced apart inside the paste-through port along the first direction. The connecting parts are partially hollowed out. The connecting parts are spaced apart from the first metal layer, so that a paste storage cavity is formed between the connecting parts and the first metal layer.

[0011] Preferably, the slurry inlet includes several alternating slurry inlet zones and reinforcing zones. Each slurry inlet zone extends from the slurry coating surface to the printing inlet. Along a second direction perpendicular to the first direction, the size of the reinforcing zone is larger than the size of the slurry inlet zone. Each reinforcing zone is provided with the connecting portion.

[0012] Preferably, the slurry storage chamber includes:

[0013] The main cavity is disposed along the first direction; and,

[0014] A connecting cavity is disposed between the two ends of the main cavity and the slurry permeation zone, and the volume of the connecting cavity gradually increases from the slurry permeation zone toward the main cavity.

[0015] Preferably, the distance between the connecting portion and the first metal layer is H, where H is 0-15 micrometers.

[0016] Preferably, the connecting portion has a plurality of grout-permeable holes distributed along the first direction, so that the connecting portion is partially hollowed out and a connecting bridge is formed between two adjacent grout-permeable holes.

[0017] Preferably, the slurry-permeable hole is spaced apart from the side of the connecting portion along a second direction perpendicular to the first direction.

[0018] Preferably, the distance between the slurry perforation hole and the side of the connecting part is L, where L is 1-20 micrometers.

[0019] Preferably, L is 2 micrometers or 3 micrometers.

[0020] Preferably, the side of the slurry-permeable hole is arranged parallel to the side of the connecting portion along a second direction perpendicular to the first direction.

[0021] A printing device includes a frame, an ink supply mechanism, a pad printing mechanism, and a fully open printing plate. The ink supply mechanism, the pad printing mechanism, and the fully open printing plate are all mounted on the frame. The pad printing mechanism is used to print the ink supplied by the ink supply mechanism onto the substrate through the fully open printing plate to form several continuous fine grids.

[0022] The beneficial effects of this utility model are:

[0023] The fully open printing plate of the present invention enhances the strength of the printing plate by setting a partially hollowed-out connecting part at the paste passage, ensuring the deformation resistance of the printing plate and extending its service life. During printing, the paste is stored together by the partially hollowed-out connecting part and the paste storage chamber, so that the paste passage, which is the same length as the printing port and runs through it, supplies sufficient paste to the printing port. This prevents gaps from forming at the position of the connecting part corresponding to the fine grid due to insufficient paste supply, ensuring the integrity of the fine grid. At the same time, it effectively controls the printing height of the welding area, thereby improving the printing quality of the battery cell. Attached Figure Description

[0024] Figure 1 This is a top view of the fully open steel plate for printing according to this utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 yes Figure 2 Sectional view along the BB direction;

[0027] Figure 4 yes Figure 2 A cross-sectional view along the CC direction.

[0028] In the picture:

[0029] 1. First metal layer; 11. Printing port;

[0030] 2. Second metal layer; 21. Grout inlet; 211. Grout inlet zone; 212. Reinforced zone;

[0031] 3. Connecting part; 31. Grouting hole; 32. Connecting bridge;

[0032] 4. Slurry storage chamber; 41. Main chamber; 42. Connecting chamber. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," 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.

[0037] The following reference Figures 1 to 4 The fully open printing plate and printing equipment provided by the present invention will be described.

[0038] The printing equipment includes a frame, an ink supply mechanism, a pad printing mechanism, and a fully open printing plate. The ink supply mechanism, the pad printing mechanism, and the fully open printing plate are all connected to the frame. The pad printing mechanism is used to print the ink supplied by the ink supply mechanism onto the substrate through the fully open printing plate to form several fine grids.

[0039] This fully open printing plate is designed to print at least several full strips of fine lines on a substrate in a single pass. Please refer to the following for the specific structure of this fully open printing plate.

[0040] Reference Figure 1 , Figure 2 and Figure 3The printing plate with a full opening includes a first metal layer 1 and a second metal layer 2. The second metal layer 2 is superimposed on the side of the first metal layer 1 facing away from the substrate. In this embodiment, the first metal layer 1 and the second metal layer 2 are both horizontally arranged, and their positional relationship is illustrated by stacking them sequentially from bottom to top. It should be noted that in some other embodiments, the first metal layer 1 and the second metal layer 2 may also be tilted to a certain extent, and the specific tilt angle is not limited.

[0041] Specifically, the first metal layer 1 has printing openings 11 for printing at least one entire fine grid in a single operation. In this embodiment, several printing openings 11 are arranged in parallel on the first metal layer 1, each printing opening 11 is arranged along a first direction, and the several printing openings 11 are distributed along a second direction perpendicular to the first direction, so that several entire fine grids can be printed at once. The side of the second metal layer 2 away from the printing openings 11 is the slurry coating surface, that is, the top surface of the second metal layer 2 is the slurry coating surface. The second metal layer 2 is provided with a slurry penetration port 21 for each printing opening 11. The slurry penetration port 21 extends from the slurry coating surface to the printing opening 11, and multiple connecting parts 3 are provided at intervals in the middle of the slurry penetration port 21 (the side of the connecting part 3 is shown in the figure). Figure 2 (The dotted line in the middle), the connecting part 3 is partially hollowed out, and the connecting part 3 is spaced apart from the first metal layer 1, so that a slurry storage cavity 4 is formed between the connecting part 3 and the first metal layer 1.

[0042] As described above, firstly, the thickness of the fully open printing plate is increased by using two superimposed metal layers 1 and 2, ensuring the basic strength of the fully open printing plate. Secondly, the strength of the second metal layer 2 is increased by using the partially hollowed-out connecting part 3, so that the second metal layer 2 is less prone to deformation, ultimately improving the strength of the fully open printing plate.

[0043] Secondly, by setting multiple partially hollowed-out connecting parts 3, the upper and lower layered connecting parts 3 and the slurry storage chamber 4 can store a sufficient amount of slurry. During printing, the slurry will flow to the printing port 11 under its own gravity, thus ensuring a sufficient supply of slurry at the position of the connecting part 3 corresponding to the printing port 11, which takes into account both the strength of the fully open steel plate for printing and the printing quality.

[0044] Furthermore, each ink penetration port 21 includes several alternately arranged ink penetration zones 211 and reinforcing zones 212. Multiple ink penetration zones 211 extend from the ink coating surface to the printing port 11. Each reinforcing zone 212 is provided with a connecting portion 3, forming a ink storage cavity 4 at the bottom of the connecting portion 3. Each ink storage cavity 4 includes interconnected ink storage cavities 4 and connecting cavities 42, with the ink storage cavities 4 arranged along the length of the printing port 11. The connecting cavities 42 are located between the two ends of the ink storage cavity 4 and the ink penetration zones 211. From the ink penetration zones 211 towards the ink storage cavity 4, the volume of the connecting cavities 42 gradually increases. The connecting cavities 42 serve as a transition connecting the ink storage cavity 4 and the ink penetration zones 211, and also guide the ink flow, allowing the ink from the ink penetration zones 211 to flow more smoothly into the ink storage cavity 4, thus ensuring the ink supply to the ink storage cavity 4.

[0045] Exemplarily, the first metal layer 1 is deposited on the substrate using an electroforming process. Its printing ports 11 are formed by photolithography and etching. The width of each printing port 11 is 5-20 micrometers; in this embodiment, 10 micrometers is used as an example. An enlarged portion is provided in a localized area of ​​the printing port 11, and a reinforcing region 212 is located at the enlarged portion. The width of the enlarged portion is 110 micrometers, as an example, to ensure the integrity of the printed image. The second metal layer 2 is superimposed by magnetron sputtering and formed by laser engraving into a paste-through region 211 and a reinforcing region 212. The width of the main cavity 41 of the paste storage chamber 4 is 80-120 micrometers; in this embodiment, 80 micrometers is used as an example, thereby ensuring the paste supply to the printing ports 11.

[0046] Furthermore, the distance between the connecting portion 3 and the first metal layer 1 is H, where H is 0-25 micrometers. Specifically, the thickness of the first metal layer 1 is 5-25 micrometers; in this embodiment, 20 micrometers is used as an example. In other embodiments, the thickness of the first metal layer 1 may also be 5, 10, 15, or 25 micrometers. The thickness of the second metal layer 2 is 5-30 micrometers; in this embodiment, 25 micrometers is used as an example. In other embodiments, the second metal layer 2 may also be 5, 10, 15, 20, or 30 micrometers.

[0047] Therefore, limiting the distance between the connecting part 3 and the first metal layer 1 to 0-25 micrometers ensures the thickness of the connecting part 3, thereby ensuring the strength of the second metal layer 2. Preferably, in this embodiment, H is 10 micrometers, which can balance the strength of the second metal layer 2 and the capacity of the slurry storage chamber 4. In some other embodiments, H may also be 0.5, 1, 15, 20 or 25 micrometers.

[0048] Reference Figure 4For example, in this embodiment, the connecting part 3 is a metal layer of the same material as the second metal layer 2, and the connecting part 3 is integrally formed with the second metal layer 2, that is, the connecting part 3 is formed by laser engraving. Each connecting part 3 is provided with a plurality of ink penetration holes 31 at intervals along the length direction of the printing port 11, and a connecting bridge 32 is formed between two ink penetration holes 31, thereby increasing the total ink penetration area of ​​the connecting part 3, so as to increase the ink penetration amount of the connecting part 3 and ensure the ink supply to the ink storage chamber 4.

[0049] Optionally, in some other embodiments, the connecting part 3 may also be a metal mesh plate, a perforated metal plate, or a plurality of spaced metal sheets; in some other embodiments, the connection between the connecting part 3 and the second metal layer 2 may also be welding.

[0050] To ensure the strength of the connecting part 3, the grout passage hole 31 is spaced apart from the side of the connecting part 3 along the second direction, so that there is a gap between the grout passage hole 31 and the side of the connecting part 3. This not only improves the strength of the connecting part 3, but also causes the grout passage hole 31 to have an error in the second direction, thereby reducing the processing difficulty.

[0051] Reference Figure 2 and Figure 4 For example, along the second direction, the distance between the slurry passage hole 31 and the side of the connecting portion 3 is L, where L is 1-20 micrometers. In this embodiment, L is preferably 3 micrometers. When L is 3 micrometers, sufficient processing error is allowed while ensuring the length of the slurry passage hole 31 in the second direction, so that the slurry passage effect of the slurry passage hole 31 is better. In some other embodiments, L may also be 1, 2, 10, or 20 micrometers.

[0052] Optionally, the grout-permeable hole 31 communicating with the main cavity 41 is the first grout-permeable hole, and the grout-permeable hole 31 communicating with the connecting cavity 42 is the second grout-permeable hole. The first grout-permeable hole is rectangular in shape, with two opposite sides parallel to the second direction, thus ensuring that the first grout-permeable hole is parallel to the side of the connecting part 3, resulting in a uniform distance between the first grout-permeable hole and the side of the connecting part 3, which helps improve the strength at the first grout-permeable hole. The second grout-permeable hole is trapezoidal in shape, with two hypotenuses parallel to the side of the connecting part 3, also ensuring a uniform distance between the second grout-permeable hole and the side of the connecting part 3, further improving the strength at the second grout-permeable hole. Ultimately, this enhances the overall strength of the connecting part 3. Of course, in other embodiments, the grout-permeable hole 31 can also be square, pentagonal, or other shapes.

[0053] 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 printing plate, characterized in that, The fully open printing plate includes at least: A first metal layer (1) is provided with a printing opening (11) along a first direction, the printing opening (11) being used to print an entire fine grid in a single operation; and, A second metal layer (2) is superimposed on one side of the first metal layer (1). The second metal layer (2) is provided with a paste inlet (21) along the first direction. The side of the second metal layer (2) away from the first metal layer (1) is the paste coating surface. The paste inlet (21) extends from the paste coating surface to the printing port (11). Multiple connecting parts (3) are provided at intervals along the first direction inside the paste inlet (21). The connecting parts (3) are partially hollowed out. The connecting parts (3) are spaced apart from the first metal layer (1) so that a paste storage cavity (4) is formed between the connecting parts (3) and the first metal layer (1).

2. The printing plate with a fully open top as described in claim 1, characterized in that, The slurry inlet (21) includes several alternating slurry inlet areas (211) and reinforcing areas (212). Each slurry inlet area (211) extends from the slurry coating surface to the printing inlet (11). Along a second direction perpendicular to the first direction, the size of the reinforcing area (212) is larger than the size of the slurry inlet area (211). Each reinforcing area (212) is provided with the connecting portion (3).

3. A fully open printing plate according to claim 2, characterized in that, The slurry storage chamber (4) includes: The main cavity (41) is disposed along the first direction; and, A connecting cavity (42) is disposed between the two ends of the main cavity (41) and the slurry permeation zone (211). The volume of the connecting cavity (42) gradually increases from the slurry permeation zone (211) toward the main cavity (41).

4. A fully open printing plate according to claim 1, characterized in that, The distance between the connecting part (3) and the first metal layer (1) is H, where H is 0-15 micrometers.

5. A fully open printing plate according to claim 1, characterized in that, The connecting part (3) has a plurality of grout-permeable holes (31) distributed along the first direction, so that the connecting part (3) is partially hollowed out and a connecting bridge (32) is formed between two adjacent grout-permeable holes (31).

6. A fully open printing plate according to claim 5, characterized in that, Along a second direction perpendicular to the first direction, the slurry-permeable hole (31) is spaced apart from the side of the connecting part (3).

7. A fully open printing plate according to claim 6, characterized in that, The distance between the slurry perforation hole (31) and the side of the connecting part (3) is L, where L is 1-20 micrometers.

8. A fully open printing plate according to claim 7, characterized in that, L is 2 micrometers or 3 micrometers.

9. A fully open printing plate according to claim 5, characterized in that, Along a second direction perpendicular to the first direction, the side of the slurry hole (31) is arranged parallel to the side of the connecting part (3).

10. Printing equipment, characterized in that, The device includes a frame, an ink supply mechanism, a pad printing mechanism, and a fully open printing plate as described in any one of claims 1-9. The ink supply mechanism, the pad printing mechanism, and the fully open printing plate are all mounted on the frame. The pad printing mechanism is used to print the ink supplied by the ink supply mechanism onto the substrate through the fully open printing plate to form several continuous fine grids.

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