A fully open steel plate with precise size control
Patent Information
- Application Number
- CN202522224917.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-10-21
AI Technical Summary
[0002]全开口钢版在太阳能电池片上应用越来越广泛，从初期的异质结电池片，到BC电池，再到Topcon电池片，电池片尺寸也由半片向全片转换，在210尺寸的电池片上，尺寸精准控制对印刷良率至关重要，全开口钢版属于图形化定制，预制图形，对图形尺寸的把控更加困难
[0015]本实用新型的精准控制尺寸的全开口钢版的有益效果：由于钢版本体上设有印刷图形区域和卸力区域，卸力区域位于印刷图形区域沿第一方向的两侧，卸力区域内的第一卸力槽沿第二方向超出印刷图形区域内的栅线槽设置，且超出长度为15mm-30mm，第一卸力槽的设计，能够与印刷图形区域的受力抵消，在印刷电池片外部施加拉力时，由第一卸力槽均匀分布受力，并有效向印刷图形区域内均匀传递，使印刷图形区域的四边受力相对均匀，对栅线图形的变化影响降到最低，保证了栅线尺寸的精确性。
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Figure CN224702708U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell printing equipment technology, and in particular to a fully open steel plate for precise size control. Background Technology
[0002] Fully open stencils are increasingly used in solar cells, from early heterojunction cells to BC cells and then to Topcon cells. Cell sizes have also shifted from half cells to full cells. For 210-size cells, precise size control is crucial for printing yield. Fully open stencils are custom-designed with pre-made graphics, making it more difficult to control the size of the graphics. Utility Model Content
[0003] The purpose of this invention is to provide a fully open steel plate for precise size control. This fully open steel plate adds a first stress relief groove, which cancels out the force on the printed pattern area. When a tensile force is applied to the outside of the printed battery cell, the force is evenly distributed by the first stress relief groove and effectively transmitted evenly to the printed pattern area, so that the four sides of the printed pattern area are relatively uniformly stressed, minimizing the impact on the changes in the grid pattern and ensuring the accuracy of the grid size.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] This utility model discloses a fully open steel plate with precise size control, 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 printed graphic area and a stress-relieving area. The printed graphic area is provided with a grid groove, and the stress-relieving area is provided with a first stress-relieving groove. The stress-relieving area is located on both sides of the printed graphic area along a first direction. The grid groove and the first stress-relieving groove extend along a second direction. Along the second direction, both ends of the first stress-relieving groove extend beyond the grid groove by a length of 15mm-30mm.
[0006] In some embodiments, there are multiple first stress relief grooves, and the multiple first stress relief grooves are arranged at intervals along a first direction.
[0007] In some specific embodiments, each of the first unloading grooves includes a plurality of first sub-grooves arranged at intervals along the second direction, and the intervals between the plurality of first sub-grooves of two adjacent first unloading grooves are staggered along the second direction.
[0008] In some specific embodiments, the plurality of first unloading grooves are divided into multiple groups, and a second unloading groove is provided between two adjacent groups of first unloading grooves. Along the second direction, both ends of the second unloading groove extend beyond the first unloading groove.
[0009] In some more specific embodiments, along the second direction, the end of the second unloading groove extends 5mm-20mm beyond the end of the first unloading groove.
[0010] In some more specific embodiments, each of the first unloading grooves includes a plurality of first sub-grooves spaced apart along a second direction, and each of the second unloading grooves includes a plurality of second sub-grooves spaced apart along a second direction, with the intervals between the plurality of first sub-grooves and the intervals between the plurality of second sub-grooves being staggered along the second direction.
[0011] In some embodiments, the steel body includes a main body layer and a skeleton layer, the main body layer being used to contact the battery cells, and the skeleton layer being used to increase the strength of the steel body.
[0012] In some specific embodiments, the thickness of the main body layer is 5μm-15μm.
[0013] In some specific embodiments, the thickness of the skeleton layer is 5μm-40μm.
[0014] In some specific embodiments, both the first stress relief groove and the grid groove are stepped grooves, and the width of the portion of the first stress relief groove located in the main body layer is smaller than the width of the portion of the first stress relief groove located in the skeleton layer; the width of the portion of the grid groove located in the main body layer is smaller than the width of the portion of the grid groove located in the skeleton layer.
[0015] The beneficial effects of this utility model's fully open steel plate with precise size control are as follows: The steel plate body has a printed graphic area and a stress-relief area. The stress-relief area is located on both sides of the printed graphic area along the first direction. The first stress-relief groove within the stress-relief area extends beyond the grid line groove within the printed graphic area along the second direction, with an extension length of 15mm-30mm. The design of the first stress-relief groove can counteract the force on the printed graphic area. When a tensile force is applied to the outside of the printed battery cell, the force is evenly distributed by the first stress-relief groove and effectively transmitted evenly to the printed graphic area, making the force on the four sides of the printed graphic area relatively uniform. This minimizes the impact on changes in the grid line pattern and ensures the accuracy of the grid line dimensions.
[0016] 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
[0017] Figure 1 This is a structural schematic diagram of a fully open steel plate with precisely controlled dimensions according to an embodiment of this utility model;
[0018] Figure 2This is a schematic diagram of the printed graphic area and the stress-relief area in an embodiment of this utility model;
[0019] Figure 3 This is a partial structural schematic diagram of the unloading area in an embodiment of the present invention.
[0020] Figure label:
[0021] 100. Steel plate frame; 200. Auxiliary material layer; 300. Steel plate body; 310. Printed graphic area; 311. Grid groove; 320. Unloading area; 321. First unloading groove; 322. Second unloading groove. Detailed Implementation
[0022] 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.
[0023] 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.
[0024] 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.
[0025] This utility model discloses a fully open steel plate with precise dimensional control (hereinafter referred to as the fully open steel plate for ease of description), see reference Figures 1-3As 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 printing graphic area 310 and a stress-relieving area 320. The printing graphic area 310 is provided with a grid groove 311, and the stress-relieving area 320 is provided with a first stress-relieving groove 321. The stress-relieving area 320 is located on both sides of the printing graphic area 310 along a first direction. The grid groove 311 and the first stress-relieving groove 321 extend along a second direction. Along the second direction, both ends of the first stress-relieving groove 321 extend beyond the grid groove 311 by a length of 15mm-30mm.
[0026] It should be noted that in the existing fully open stencils, the force exerted on the stencil by the squeegee during its movement is transmitted from the outside of the printed graphic area 310 inwards. This causes a difference in size between the outer dimensions and the middle dimensions of the printed graphic area 310 due to the different tension. Although this difference does not affect normal printing, it results in low accuracy of the printed grid lines. To avoid this, existing fully open stencils usually require the use of a corresponding main grid plate to control the grid line size. However, this not only affects on-site material management and material versatility but also increases the relative cost of use and is not conducive to the mass production and promotion of fully open stencils.
[0027] It is understood that the fully open steel plate disclosed in this embodiment has a printed pattern area 310 and a stress-relieving area 320 on the steel plate body 300. The stress-relieving area 320 is located on both sides of the printed pattern area 310 along the first direction. The first stress-relieving groove 321 in the stress-relieving area 320 is set beyond the grid line groove 311 in the printed pattern area 310 along the second direction, and the extension length is 15mm-30mm. The design of the first stress-relieving groove 321 can cancel the force on the printed pattern area 310. When a tensile force is applied to the outside of the printed battery cell, the force is evenly distributed by the first stress-relieving groove 321 and effectively transmitted evenly to the printed pattern area 310, so that the four sides of the printed pattern area 310 are relatively evenly stressed, minimizing the impact on the grid line pattern and ensuring the accuracy of the grid line size. It should be further explained that if the length of both ends of the first stress relief groove 321 extending beyond the grid groove 311 is small, it is not conducive to stress relief. If the length of both ends of the first stress relief groove 321 extending beyond the grid groove 311 is large, it will reduce the strength of the entire steel plate body 300. In this embodiment, the length of both ends of the first stress relief groove 321 extending beyond the grid groove 311 is controlled between 15mm and 30mm, which can ensure both the stress relief function of the first stress relief groove 321 and the strength of the steel plate body 300.
[0028] Optionally, the length by which the end of the first stress-relieving groove 321 extends beyond the grid groove 311 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm. Of course, other values between 15mm and 30mm can be selected according to actual needs, and are not limited to the examples mentioned above.
[0029] Optionally, the steel plate frame 100 is made of high-strength alloy material, which has good rigidity and corrosion resistance, ensuring that the steel plate body 300 will not deform during the printing process. The steel plate frame 100 has precise positioning holes and fixing edges around its perimeter to ensure the consistency of the printing position each time.
[0030] In some embodiments, reference Figure 3 As shown, there are multiple first stress relief grooves 321, which are arranged at intervals along the first direction. It is understood that setting multiple first stress relief grooves 321 can better achieve the stress relief function and further improve the printing accuracy of the grid lines. The number of first stress relief grooves 321 can be determined according to parameters such as the size of the battery cell and the size of the grid lines; therefore, no specific limit is placed on the exact number of first stress relief grooves 321 here.
[0031] In some specific embodiments, reference is made to Figure 3 As shown, each first stress relief groove 321 includes multiple first sub-grooves arranged at intervals along a second direction, and the intervals between the multiple first sub-grooves of two adjacent first stress relief grooves 321 are staggered along the second direction. It can be understood that the multiple first sub-grooves of two adjacent first stress relief grooves 321 in the first direction are staggered. This distribution is beneficial for uniform stress relief, making the four sides of the printed pattern area 310 relatively uniformly stressed, minimizing the impact on changes in the grid line pattern, and ensuring the accuracy of the grid line dimensions.
[0032] In some specific embodiments, reference is made to Figure 3 As shown, multiple first stress relief grooves 321 are divided into multiple groups, and a second stress relief groove 322 is provided between two adjacent groups of first stress relief grooves 321. Along the second direction, both ends of the second stress relief groove 322 extend beyond the first stress relief groove 321. The length of the added second stress relief groove 322 is greater than that of the first stress relief groove 321. The supplementary second stress relief groove 322 can further enhance the stress relief effect of the stress relief area 320, making the four sides of the printed graphic area 310 relatively uniformly stressed, thus ensuring the accuracy of the grid line size.
[0033] In some more specific embodiments, along the second direction, the end of the second stress-relieving groove 322 extends 5mm-20mm beyond the end of the first stress-relieving groove 321. Optionally, the length of the second stress-relieving groove 322 extending beyond the first stress-relieving groove 321 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm. Of course, other values between 5mm and 20mm can be selected according to actual needs, and are not limited to the examples above.
[0034] In some more specific embodiments, reference is made to Figure 3 As shown, each first stress-relieving groove 321 includes multiple first sub-grooves spaced apart along a second direction, and each second stress-relieving groove 322 includes multiple second sub-grooves spaced apart along a second direction. The intervals between the multiple first sub-grooves and the intervals between the multiple second sub-grooves are staggered along the second direction. It can be understood that the staggered arrangement of the intervals between the multiple first sub-grooves and the multiple second sub-grooves along the second direction facilitates uniform stress relief, ensuring relatively uniform stress distribution on the four sides of the printed pattern area 310, minimizing the impact on changes in the grid line pattern, and guaranteeing the accuracy of the grid line dimensions.
[0035] In some embodiments, the steel plate body 300 includes a main body layer and a skeleton layer. The main body layer is used to contact the battery cell, and the skeleton layer is used to increase the strength of the steel plate body 300. Thus, while ensuring printing accuracy, the overall strength of the steel plate body 300 can be improved, which helps to extend the service life of the fully open steel plate.
[0036] In some specific embodiments, the thickness of the main body layer is 5μm-15μm. Optionally, the thickness of the main body layer is 5μm, 6μm, 7μm, 8μm, 9μm, 10μm, 11μm, 12μm, 13μm, 14μm, or 15μm. Of course, other values within the 5μm-15μm range can also be selected according to actual needs. It is understood that if the thickness of the main body layer is too small, it will reduce the strength and service life of the fully open steel plate; if the thickness of the main body layer is too large, it will lead to material waste, increase the manufacturing cost and weight of the fully open steel plate, and make it inconvenient to transport and use. In this embodiment, controlling the thickness of the main body layer between 5μm and 15μm can ensure the strength of the entire steel plate body 300, which is beneficial to extending the service life of the fully open steel plate, while also reducing manufacturing costs and facilitating the transportation and use of the fully open steel plate.
[0037] In some specific embodiments, the thickness of the skeleton layer is 5μm-40μm. Optionally, the thickness of the skeleton layer is 5μm, 6μm, 7μm, 8μm, 9μm, 10μm, 11μm, 12μm, 13μm, 14μm, 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, or 40μm. Of course, other values within the 5μm-40μm range can also be selected according to actual needs. Understandably, if the skeleton layer is too thin, it will reduce the strength and service life of the fully open steel plate. If the skeleton layer is too thick, it will lead to material waste, increase the manufacturing cost and weight of the fully open steel plate, and make it inconvenient to transport and use. In this embodiment, controlling the thickness of the skeleton layer between 5μm and 40μm ensures the overall strength of the steel plate body (300), which is beneficial to extending the service life of the fully open steel plate, while also controlling manufacturing costs and facilitating the transportation and use of the fully open steel plate.
[0038] In some specific embodiments, both the first unloading groove 321 and the grid line groove 311 are stepped grooves. The width of the portion of the first unloading groove 321 located in the main body layer is smaller than the width of the portion located in the skeleton layer; similarly, the width of the portion of the grid line groove 311 located in the main body layer is smaller than the width of the portion located in the skeleton layer. It is understood that the stepped grooves of both the first unloading groove 321 and the grid line groove 311 ensure stable passage of the slurry through the grid line groove 311 for grid line printing while simultaneously ensuring the unloading effect of the first unloading groove 321. This results in relatively uniform force distribution across the four sides of the printed pattern area 310, minimizing the impact on grid line pattern variations and ensuring the accuracy of the grid line dimensions.
[0039] 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.
[0040] 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 with precisely controlled dimensions, characterized in that, The system 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) has a printed graphic area (310) and a stress-relieving area (320). The printed graphic area (310) is provided with a grid groove (311), and the stress-relieving area (320) is provided with a first stress-relieving groove (321). The stress relief area (320) is located on both sides of the printed graphic area (310) along the first direction. The grid groove (311) and the first stress relief groove (321) extend along the second direction. Along the second direction, both ends of the first stress relief groove (321) extend beyond the grid groove (311) by 15mm-30mm.
2. The fully open steel plate with precise dimensional control according to claim 1, characterized in that, There are multiple first unloading grooves (321), and the multiple first unloading grooves (321) are arranged at intervals along the first direction.
3. The fully open steel plate with precise dimensional control according to claim 2, characterized in that, Each of the first unloading grooves (321) includes a plurality of first sub-grooves arranged at intervals along the second direction, and the intervals between the plurality of first sub-grooves of two adjacent first unloading grooves (321) are staggered along the second direction.
4. The fully open steel plate with precise dimensional control according to claim 2, characterized in that, The first unloading grooves (321) are divided into multiple groups, and a second unloading groove (322) is provided between two adjacent groups of first unloading grooves (321). Along the second direction, both ends of the second unloading groove (322) extend beyond the first unloading groove (321).
5. The fully open steel plate with precise dimensional control according to claim 4, characterized in that, Along the second direction, the end of the second stress relief groove (322) extends 5mm-20mm beyond the end of the first stress relief groove (321).
6. The fully open steel plate with precise dimensional control according to claim 4, characterized in that, Each of the first unloading grooves (321) includes a plurality of first sub-grooves spaced apart along the second direction, and each of the second unloading grooves (322) includes a plurality of second sub-grooves spaced apart along the second direction, with the intervals between the plurality of first sub-grooves and the intervals between the plurality of second sub-grooves staggered along the second direction.
7. The fully open steel plate with precise dimensional control according to any one of claims 1-6, characterized in that, The steel body (300) includes a main body layer and a skeleton layer. The main body layer is used to contact the battery cell, and the skeleton layer is used to increase the strength of the steel body (300).
8. The fully open steel plate with precise dimensional control according to claim 7, characterized in that, The thickness of the main body layer is 5μm-15μm.
9. The fully open steel plate with precise dimensional control according to claim 7, characterized in that, The thickness of the skeleton layer is 5μm-40μm.
10. The fully open steel plate with precise dimensional control according to claim 7, characterized in that, Both the first stress relief groove (321) and the grid groove (311) are stepped grooves. The width of the portion of the first stress relief groove (321) located in the main body layer is smaller than the width of the portion of the first stress relief groove (321) located in the skeleton layer. The width of the portion of the grid groove (311) located in the main body layer is smaller than the width of the portion of the grid groove (311) located in the skeleton layer.