Printing table board paper
By setting an inclined slope on the printing table paper, the printing defects caused by abrupt changes in squeegee height in screen printing are solved, the fullness of printed lines is improved and edge damage is reduced, thus improving the printing quality of photovoltaic cells.
Patent Information
- Application Number
- CN202423271402.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In photovoltaic manufacturing, sudden changes in the height of the scraper during the screen printing process can cause incomplete printed lines, broken grids, and virtual printing, which affects the quality of the solar cells.
Design a printing table paper with an upper surface that slopes away from the groove to ensure smooth height changes of the squeegee during printing, avoid sudden drops, improve the fullness of printed lines, and reduce edge impact.
By setting an inclined slope on the printing table paper, the squeegee can be made to run smoothly, reducing vibration and edge damage during the printing process and improving printing quality.
Smart Images
Figure CN223466861U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of photovoltaic manufacturing, specifically relates to a printing mesa paper. BACKGROUND
[0002] Screen printing plays an important role in the formation of battery electrodes. Through the patterned portion of the screen, paste can be printed onto the substrate through the mesh, while the non-patterned portion does not allow paste to pass through, which realizes precise printing. In the photovoltaic industry, screen printing is not only used for the formation of electrodes, but also responsible for collecting and leading out current, as well as welding individual cells into strings.
[0003] The basic principle of screen printing is to use the mesh of the patterned portion of the screen to pass through the paste. During printing, the paste is extruded onto the substrate by a squeegee. Screen printing has an important influence on the surface morphology and electrical properties of crystalline silicon solar cells. The thickness, width, spacing, and shape of the electrodes will affect the optical properties of the cells, such as reflectivity, transmissivity, and absorptivity, which in turn affect the photoelectric conversion efficiency. At the same time, the electrical properties of the electrodes, such as resistance, contact resistance, series resistance, and distributed resistance, will also affect the current, voltage, and power output characteristics of the cells.
[0004] In actual production, optimizing screen printing process parameters is crucial to improving the photoelectric conversion efficiency of the cell. For example, reasonable setting of screen spacing, squeegee descent depth, printing speed, and printing pressure can improve the printing effect of the front electrode, reduce problems such as broken grid and ghost printing, and thus improve the photoelectric conversion efficiency. However, with the increasing demand for production capacity in the industry, the improvement of printing speed has also exposed some problems. For example, when the squeegee runs to the cell position, it may jump due to sudden changes in height, resulting in incomplete printing lines. This will further affect the conversion efficiency, and in severe cases, it may even cause broken grid and ghost printing on the appearance, reducing product quality. SUMMARY
[0005] To solve the technical problems mentioned in the prior art, the present disclosure proposes a printing mesa paper.
[0006] To solve the above technical problems, the utility model adopts the technical scheme that:
[0007] A printing mesa paper has a recess on the upper surface, and the opposite sides of the recess have slope surfaces that slope downward away from the recess.
[0008] In some embodiments, the entire back surface of the mesa paper is in the same plane.
[0009] In some embodiments, the vertical height of the slope surface is the same as the thickness of the printing mesa paper.
[0010] In some embodiments, the vertical height of the slope surface is 50-200 μm.
[0011] In some embodiments, the depth of the groove is the same as the thickness of the printing target, and the printing target is a solar cell.
[0012] In some embodiments, the length and width of the groove are greater than the length and width of the printing target, respectively.
[0013] In some embodiments, the difference between the length of the groove and the length of the printing target is 0.5-2 mm, and the difference between the width of the groove and the width of the printing target is 0.5-2 mm.
[0014] In some embodiments, the length of the groove is equal to the width of the groove, the length of the groove is 182.5-184 mm or 210.5-212 mm, or the length of the groove is not equal to the width of the groove, the length of the groove is 210.5-212 mm and the width of the groove is 182.5-184 mm, or the length of the groove is not equal to the width of the groove, the length of the groove is 192.1-193.6 mm and the width of the groove is 182.5-184 mm.
[0015] In some embodiments, in the longitudinal section along the arrangement direction of the slope surface and the groove, the profile of the slope surface is a straight line segment, the profile of the slope surface is a curve segment with a curvature not equal to 0, or the profile of the slope surface comprises a first straight line segment and a second straight line segment connected to each other, wherein the first straight line segment is connected to the profile of the groove and is parallel to the lower surface of the printing table paper.
[0016] By using the above technical solutions, the present disclosure has the following beneficial effects compared with the prior art:
[0017] The printing table paper disclosed in the present disclosure has the slope surface arranged at the opposite end of the groove on the upper surface, which is inclined downward in the direction away from the groove. When the squeegee runs to the printing target position from the edge of the printing table paper or leaves the printing target position after printing, the height gradually changes, avoiding the sudden height difference, ensuring the stable printing of the squeegee, avoiding the jumping phenomenon caused by the sudden height difference during printing or after printing, improving the fullness of the printing line, and reducing the probability of problems such as broken grid and virtual printing. The impact force when the squeegee contacts the corner of the printing target is reduced, the damage of the printing target corner to the printing screen is reduced, and thus the overall printing quality is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to make the technical field personnel better understand the present disclosure, the following will be combined with the drawings in the embodiments of the present disclosure, the technical solutions in the embodiments of the present disclosure are described clearly and completely, obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present disclosure.
[0019] Fig. 1 It is an embodiment of the present application that the cross-sectional structure of the printing table paper is shown in the figure.
[0020] Fig. 2 It is another embodiment of the present application that the cross-sectional structure of the printing table paper is shown in the figure.
[0021] Fig. 3 It is another embodiment of the present application that the cross-sectional structure of the printing table paper is shown in the figure.
[0022] Explanation of reference signs:
[0023] 1-slope surface; 2-groove; 3-lower surface. EMBODIMENTS
[0024] In order to make the technical field personnel better understand the present disclosure, the following will be combined with the drawings in the embodiments of the present disclosure, the technical solutions in the embodiments of the present disclosure are described clearly and completely, obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present disclosure.
[0025] It should be noted that the terms "first", "second" and the like in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0026] In the present disclosure, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present disclosure and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0027] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present disclosure can be understood according to the specific circumstances.
[0028] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.
[0029] It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict. The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.
[0030] Please refer to Figs. 1 to 3 An embodiment of the present disclosure provides a printing table paper, the upper surface of which has a groove 2, and the opposite sides of the groove 2 respectively have a slope 1 which inclines downward away from the groove 2. The groove 2 is used to accommodate a printing target, which can be a solar cell in particular.
[0031] The entire back surface of the table paper is in the same plane. The table paper is placed on the table, and each position is supported by the table.
[0032] In some embodiments, the vertical height of the slope 1 is the same as the thickness of the printing table paper. The slope 1 extends from the upper surface of the table paper to the back surface of the table paper, which can reduce the steep change of the height difference. In detail, the vertical height of the slope 1 is 50 μm to 200 μm. The present disclosure does not make specific limitations on this.
[0033] In some embodiments, the depth of the groove 2 is the same as the thickness of the printing target. In the screen printing, the solar cell is placed in the groove 2, and the surface of the solar cell is flush or substantially flush with the upper surface of the table paper, so that the height difference between the surface of the solar cell and the upper surface of the table paper is eliminated.
[0034] In some embodiments, the length and width of the groove 2 are greater than the length and width of the printing target, respectively. In detail, the length of the groove 2 is 0.5mm-2mm greater than the length of the printing target; and the width of the groove 2 is 0.5mm-2mm greater than the width of the printing target.
[0035] The length and width of the groove 2 can be equal or not equal. For example, for a square solar cell, the length and width of the groove 2 can be configured to be equal or substantially equal; for a rectangular solar cell, the length and width of the groove 2 can be configured according to the actual length and width of the solar cell.
[0036] For example, the length and width of the groove 2 are configured to be equal, and the length of the groove 2 is 182.5-184mm, which can be applicable to a solar cell with a specification of 182x182mm. The length and width of the groove 2 are configured to be equal, and the length of the groove 2 is 210.5-212mm, which can be applicable to a solar cell with a specification of 210x210mm. The length and width of the groove 2 can be configured to be not equal, for example, the length of the groove 2 is 210.5-212mm, and the width of the groove 2 is 182.5-184mm, which can be applicable to a solar cell with a specification of 210x182mm. The length and width of the groove 2 can be configured to be not equal, for example, the length of the groove 2 is 192.1-193.6mm, and the width of the groove 2 is 182.5-184mm, which can be applicable to a solar cell with a specification of 191.6x182mm.
[0037] Please refer to Fig. 1 In some embodiments, in the longitudinal section along the arrangement direction of the slope surface 1 and the groove 2, the profile line of the slope surface 1 is a straight line segment. In detail, the angle between the slope surface 1 and the lower surface 3 of the printing table paper is less than 90 degrees, i.e., the slope surface 1 is an inclined surface.
[0038] Please refer to Fig. 2 In other embodiments, in the longitudinal section along the arrangement direction of the slope surface 1 and the groove 2, the profile line of the slope surface 1 includes a first straight line segment and a second straight line segment connected with each other; and the first straight line segment is connected with the profile line of the groove 2 and is parallel to the lower surface 3 of the printing table paper. In detail, the slope surface 1 includes an inclined surface and a flat surface, and the flat surface is parallel to the lower surface 3 of the printing table paper, and the angle between the inclined surface and the lower surface 3 of the printing table paper is less than 90 degrees. By arranging a flat surface, a stable contact area can be reserved for the squeegee.
[0039] Please refer toFig. 3 In some embodiments, in a longitudinal section along the arrangement direction of the slope surface 1 and the groove 2, the profile line of the slope surface 1 is a curve segment with a curvature of 0.
[0040] Finally, it should be noted that the above only describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, modifications or equivalent replacements of the technical solutions described in the foregoing embodiments or equivalent replacements of part of the technical features can still be made by those skilled in the art, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.
Claims
1. A printing blanket paper characterized by, The upper surface has a groove, opposite sides of the groove have slope surfaces, the slope surfaces are inclined downward in a direction away from the groove.
2. The printing bed sheet of claim 1, wherein, The whole back surface of the table paper is in the same plane.
3. The printing bed sheet of claim 1, wherein, The vertical height of the slope surface is the same as the thickness of the printed table paper.
4. The printing blanket paper of claim 2 wherein, The vertical height of the slope surface is 50-200 microns.
5. The printing bed sheet of claim 1, wherein, The depth of the groove is the same as the thickness of the printed target, the printed target being a solar cell.
6. The printing bed sheet of claim 1, wherein, The length and width of the groove are greater than the length and width of the printed target, respectively.
7. The printing blanket paper of claim 5 wherein, The difference between the length of the groove and the length of the printed target is 0.5-2 mm, and the difference between the width of the groove and the width of the printed target is 0.5-2 mm.
8. The printing bed sheet of claim 1, wherein, The length of the groove is equal to the width of the groove, and the length of the groove is 182.5-184 mm or 210.5-212 mm. Alternatively, the length of the groove is not equal to the width of the groove, the length of the groove is 210.5-212 mm, and the width of the groove is 182.5-184 mm. Alternatively, the length of the groove is not equal to the width of the groove, the length of the groove is 192.1-193.6 mm, and the width of the groove is 182.5-184 mm.
9. The printing blanket paper according to any one of claims 1 to 8, wherein, In the longitudinal section along the arrangement direction of the slope surface and the groove, the profile of the slope surface is a straight line segment, the profile of the slope surface is a curve segment with a curvature not equal to 0, or the profile of the slope surface comprises a first straight line segment and a second straight line segment connected to each other, wherein the first straight line segment is connected to the profile of the groove and is parallel to the lower surface of the printed table paper.