High-strength full-opening nickel alloy screen printing plate and processing technology thereof

Abstract

The invention belongs to the technical field of screen printing plates, and particularly relates to a high-strength full-opening nickel alloy screen printing plate and a machining technology thereof.The high-strength full-opening nickel alloy screen printing plate comprises a base plate, a downwards-sunken printing groove is formed in the end face of the base plate, the sunken face of the printing groove is an S face, a plurality of printing holes are formed in the S face of the printing groove, and the overall width of the printing holes ranges from 5 micrometers to 15 micrometers; a plurality of printing holes are formed in the printing groove, a rough surface belt for improving the printing fullness is arranged on the printing groove between the printing holes, a plurality of ink storage grooves are further formed in the S surface of the printing groove outside the printing holes, a plurality of flow guide groove channels are arranged between the ink storage grooves in a connectable mode, and the flow guide groove channels are used for improving the roughness of the rough surface belt while being communicated with the ink storage grooves. According to the invention, through the design of the screen printing plate structure and the implementation of the process, not only can more slender and complex-shaped printing holes be formed, but also an integrated and complex-shaped ink storage groove and rough surface structure can be formed outside the plate, so that the overall printing efficiency and the printing quality are greatly improved, and the overall strength of the screen printing plate is also guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of screen printing plate, and particularly relates to a high-strength full-opening nickel alloy screen printing plate and a processing technology thereof. BACKGROUND

[0002] Solar cell grid lines are a series of metal lines on the surface of a cell, which are an important part of a photovoltaic cell and play a role in collecting and transmitting electrons. These grid lines are usually made of silver, aluminum or other conductive materials, and a printing plate is needed in the forming process of the grid lines to print or deposit the material on the surface of the silicon wafer of the solar cell. The surface of the conventional printing plate is usually provided with a screen, but the screen often blocks the printing pattern, so that the silver paste cannot be effectively printed on the surface of the silicon wafer, and hump joints or unevenness often occur. Therefore, a part of full-opening screen printing plate without screen lines gradually appears.

[0003] For example, patent application No. CN202420061734.X discloses a metal screen printing plate for improving the aspect ratio of printing paste, which realizes full-opening by combining two plate materials and cooperating with mechanical cutting.

[0004] However, with the further development of the photovoltaic industry, the existing grid lines have gradually decreased from the traditional 10-15um to 5-10um. Therefore, the conventional mechanical cutting method is prone to stress concentration and heat affected zone at the opening, which seriously affects the service life of the screen printing plate. Therefore, the forming method of the grid lines also appears electroforming.

[0005] For example, CN202411803609.2 discloses a photovoltaic electroforming screen printing plate and a preparation and forming process thereof, which proposes and improves the method of electroforming to form grid lines, solves the problems caused by traditional mechanical cutting or laser cutting, and makes the grid lines more full and the grid line size further decreased. However, the above-mentioned schemes still have the following problems in combination or single use:

[0006] Firstly, with the refinement of the grid lines, the overall thickness of the existing printing plate is greatly reduced. Therefore, printing holes and ink storage holes need to be formed on multiple plates and then bonded and combined to form a whole. During the bonding process, deviation is prone to occur, which leads to blockage of a large number of printing holes and insufficient bonding strength, resulting in cracks, notches or burst of the grid line holes during use, which leads to printing failure and a large amount of unnecessary labor cost;

[0007] Secondly, the existing printing hole can only form a straight hole shape during forming, and cannot form a hole wall shape that is beneficial to the filling of silver paste, which leads to a decrease in the filling effect of silver paste as the width of the grid line hole continues to decrease, and cannot form a more variable grid line shape to further improve the overall quality.

[0008] Finally, most existing screen printing plates still have relatively smooth surfaces, making it impossible to form complex ink reservoir structures or rough surface structures that can store ink paste near the printing holes. As a result, during the printing process, as the squeegee continues to push, the ink paste cannot effectively flow and fill each printing hole, leading to a significant reduction in the overall fullness of the grid lines. At the same time, the ink paste is also prone to evaporation and drying, affecting the overall printing efficiency. Summary of the Invention

[0009] To overcome the shortcomings of existing technologies, this invention provides a high-strength, fully open nickel alloy screen and its processing technology. Through the design and implementation of the screen structure, this invention not only creates finer but more complex-shaped printing holes, but also forms an integrated and complex-shaped ink reservoir and rough surface structure on the outside of the screen. This significantly improves overall printing efficiency and quality while ensuring the overall strength and lifespan of the screen.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a high-strength, fully open nickel alloy screen printing plate, comprising a substrate, the substrate being made of nickel alloy material through an electroforming process, wherein a downwardly recessed printing groove is provided on the end face of the substrate, the recessed surface of the printing groove being an S-surface, and a plurality of fully open printing holes of unlimited length are provided on the S-surface of the printing groove, the overall width of the printing holes being between 5um and 15um, and a roughened surface strip for improving printing fullness is provided between the plurality of printing holes on the printing groove, wherein a plurality of ink storage grooves are also provided outside the printing holes on the S-surface of the printing groove, and a plurality of guide channels are provided between the plurality of ink storage grooves, the guide channels being used to connect each ink storage groove while increasing the roughness of the roughened surface strip.

[0011] In the above-mentioned high-strength fully open nickel alloy mesh, multiple concentrated grooves with different recessed depths can be provided on the rough surface of the multiple flow channels. Multiple first flow channels can be staggered and connected between the multiple concentrated grooves and between the concentrated grooves and the flow channels.

[0012] In the above-mentioned high-strength fully open nickel alloy screen, the rough surface strip may also be composed of multiple arc-shaped grooves that bend in a single direction, and multiple second flow grooves are provided between the multiple arc-shaped grooves and between them and multiple ink storage grooves.

[0013] In the aforementioned high-strength fully open nickel alloy screen, the printing holes can be formed into a variety of downward-facing grid holes, and the inner wall of the grid holes can be formed into a variety of guide arc surfaces with different curvatures.

[0014] In the high-strength full-opening nickel alloy screen plate, a buffer area is arranged outside the substrate, a frame is arranged outside the buffer area, and the frame is in tension connection with the buffer area.

[0015] A processing technology of a high-strength full-opening nickel alloy screen plate, the process flow is as follows:

[0016] S1: forming a grid line: selecting a suitable metal sheet conductive material as a substrate, and using a photoetching method to draw a grid line pattern area on the substrate;

[0017] S2: preparation of electroforming solution: sequentially mixing nickel sulfate 75-125 g / L, cobalt sulfate 20-30 g / L, nickel chloride 15-25 g / L, boric acid 20-30 g / L, citric acid 10-20 g / L, and additives 30-60 g / L to form an electroforming solution;

[0018] S2.1: the additives include a chelating agent, an active agent, and cyclodextrin;

[0019] S3: electrochemical deposition electroforming: placing the substrate in the electroforming solution, integrally forming by electroforming, and obtaining a base nickel alloy body after demolding treatment;

[0020] S3.1: during electroforming, the voltage is 20-30 V, the current density is 4-10 A / dm2, and the process is carried out at a constant temperature of 40-60°C, without interrupting the supplement of the electroforming solution, and the time is 2-10 h;

[0021] S4: forming an ink storage groove and a rough surface: forming an ink storage groove and a rough surface pattern on the body by a way of alignment and overexposure, and then using the above-mentioned electroforming step to form the ink storage groove and the rough surface, to obtain a finished nickel alloy body;

[0022] S5: screen detection: using optical detection technology to detect the microstructure of the nickel alloy screen plate, to ensure that the size precision and surface quality meet the requirements.

[0023] In the processing technology of the high-strength full-opening nickel alloy screen plate, the mass ratio of nickel sulfate to nickel chloride in S2 is (4-6):1, and the mass ratio of nickel sulfate+nickel chloride to cobalt sulfate is (4-6):1.

[0024] In the processing technology of the high-strength full-opening nickel alloy screen plate, the pH value of the electroforming solution in S2 is between 3.5 and 4.5, which is realized by adjusting the ratio of boric acid and citric acid, and the mass ratio of boric acid to citric acid is controlled to be (1.5-2.5):1.

[0025] In the processing technology of the high-strength full-opening nickel alloy screen plate, the chelating agent in S2.1 is 5-20 g / L, the active agent is 10-50 g / L, and the cyclodextrin is 10-50 mg / L.

[0026] In the processing technology of the high-strength full-opening nickel alloy screen plate, the chelating agent is sodium gluconate, and the active agent is sodium dodecyl sulfate and sodium amino sulfate.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] (1) The present application cooperates with the screen plate of nickel alloy in the way of overlay alignment and multi-layer electroforming, so that the ink storage groove and rough surface structure can be directly arranged outside the printing hole in the case of further reducing the overall thickness of the screen plate, realizing integrated high-strength forming processing, effectively improving the overall strength of the screen plate, and greatly improving the overall service life of the screen plate.

[0029] (2) Compared with the traditional screen plate, the screen plate full-opening design in the present application has low silver paste consumption, and the overall formed grid lines have good flatness and uniformity, effectively reducing the occurrence of gourd joints and grid line collapse, cooperating with the electroforming process, not only making the grid line opening more round, but also forming various notch-down grid line patterns, the structure changes more diversely, further improving the efficiency of the battery end, and reducing the cost of paste.

[0030] (3) Through the setting of the electroforming processing technology, the printing plate as a whole will not appear stress concentration or thermal area in the forming process, and the grid line hole in terms of size precision, shape or position can be quickly adjusted and improved according to requirements, which is more flexible than the traditional process, and cooperates with the screen plate of nickel alloy, greatly improves the overall strength, and effectively improves the applicability and practicality of the screen plate.

[0031] (4) Through the further extension of the electroforming process, the printing hole can be diversified in the forming process, and various forms and different requirements of ink storage grooves and rough surfaces can be formed on the end face of the plate, so that the silver paste ink can effectively circulate, reduce evaporation and dryness, make the grid line more full after printing, and greatly improve the overall processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view of the basic form of the screen plate;

[0033] Figure 2 is a front view of the basic form of the screen plate;

[0034] Figure 3 is a micrograph of the screen plate in the form below;

[0035] Figure 4 is a micrograph of the screen plate in the form below;

[0036] Figure 5 A micrograph of the screen in form two;

[0037] Figure 6 A micrograph of the screen in form two;

[0038] Figure 7 A micrograph of the screen in form three;

[0039] Figure 8 A micrograph of the screen in form three;

[0040] Figure 9 A micrograph of the screen after printing;

[0041] Figure 10 A micrograph of the screen after printing;

[0042] In the figure: substrate 10, frame 11, printing hole 12, rough surface belt 13, printing groove 14, ink storage groove 15, rough particles 16, first grid line hole surface 17, buffer layer 18, second grid line hole surface 19, polyester cloth 20, third grid line hole surface 21, flow guide groove 22, concentration groove 23, first flow-through groove 24, arc surface groove 25, second flow-through groove 26. DETAILED DESCRIPTION

[0043] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0044] Example one:

[0045] A high-strength full-opening nickel alloy screen, the nickel alloy screen as a whole comprises a substrate 10, the substrate 10 is made of a nickel alloy material through an electroforming process, a buffer layer 18 made of a flexible material is tightly connected to the outside of the substrate 10, a frame 11 is arranged on the outer surface of the buffer layer 18, and a plurality of polyester cloths 20 are tightly connected between the frame 11 and the buffer layer 18. In this scheme, the buffer layer 18 can absorb the vibration generated by the squeegee on the screen during printing, so that the plurality of printing holes 12 on the screen are not damaged, and the layout arrangement is also facilitated. The plurality of polyester cloths 20 can also improve the problem of edge slurry leakage, further reduce the friction and vibration of the squeegee, and improve the service life of the screen.

[0046] In the above scheme, the thickness of the substrate 10 is 10-30 um, a downwardly recessed printing groove 14 is arranged on the end surface of the substrate 10, one end of the printing groove 14 is an S surface, that is, the end surface in contact with the printing doctor blade, and the other end of the substrate 10, that is, the P surface, is the contact surface with the printed object such as a photovoltaic cell, a plurality of fully open printing holes 12 are arranged on the end surface of the printing groove 14, a downwardly recessed ink storage groove 15 is arranged on the end surface of the printing groove 14 outside each printing hole 12, the overall width of the printing hole 12 can be controlled to be 5-15 um, and the length and height thereof are set according to actual requirements, and the present scheme does not make too many limitations, in the embodiment, the printing hole 12 can form a first grid hole surface 17 with an overall notch inclined towards the P surface, so that the overall cross section is in the shape of an inverted cone, the printing hole 12 in this form has a small-diameter end and a large-diameter end, wherein the small-diameter end is on the S surface and the large-diameter end is on the P surface;

[0047] When the battery surface needs to be brushed with a grid line, after the battery is fixed on the printing machine, the screen plate can be installed on the printing machine, and then the screen plate is attached to the battery, the P surface of the substrate 10 is attached to the end of the battery during the attachment, and finally the printing machine can be started, and then the printing machine can spray silver paste to the S surface of the printing groove 14, during which part of the silver paste will flow into the plurality of recessed ink storage grooves 15, and of course part of the silver paste will flow into the printing hole 12, at this time the device or the artificial can abut the printing doctor blade on the S surface, and then the silver paste can be scraped into each ink storage groove 15 and each printing hole 12, so that a grid line can be formed in each printing hole 12, and at this time if the printing hole 12 is the first grid hole surface 17, a conical grid line can be formed on the surface of the battery, in the present scheme, the notch of the first grid hole surface 17 faces downward, and during the stripping process, the grid line can smoothly slide downward, compared with the hole structure with the notch facing upward, the formed grid line will not be scratched by the inner wall of the printing hole 12 during the process, and the grid line will not be collapsed, uneven, etc. The phenomenon can guarantee the integrity of the grid line and also improve the efficiency of the battery, reduce the cost of silver paste, and in the above printing process, the printing plate is scraped each time according to the standard that a large number of ink storage grooves 15 are full and scraped flat, so as to ensure that the silver paste inside the printing hole 12 below each ink storage groove 15 is full, and reduce the occurrence of printing defects such as void printing.

[0048] It should be noted that the printing machine in the above process is a prior art, and the specific printing steps are also a prior art, which will not be described in detail in the present scheme, and the above steps are only a conventional process.

[0049] Further, a plurality of rough surface bands 13 are arranged on the S surface of the printing groove 14 outside the ink storage groove 15, and the plurality of rough surface bands 13 are composed of a plurality of irregularly arranged outward protruding rough particles 16; when the printing squeegee is scraped on the surface of the printing groove 14 during the screen printing, the silver paste will flow between the plurality of rough particles 16 on the rough surface band 13 under the action of the squeegee. Compared with the smooth surface of the screen, the arrangement of the rough surface band 13 can make the silver paste be pushed by the squeegee more regularly, so that the silver paste can flow better into the printing hole 12. At the same time, the rough surface band 13 can also store part of the silver paste on the end surface outside the ink storage groove 15 after a single scraping, so as to ensure the wet state of the silver paste and prevent it from drying and evaporating. In subsequent multiple scrapings, the silver paste can also be replenished in time, thereby improving the efficiency of printing and the fullness of the screen lines.

[0050] It should be noted that the rough particles 16 can be circular, square, diamond or other shapes, and the size, shape and arrangement of the rough particles 16 can be set according to actual conditions, as long as the silver paste can flow smoothly and the evaporation and drying are reduced. The figure is only for reference.

[0051] Further, a plurality of rough surface bands 13 are arranged on the S surface of the printing groove 14 outside the ink storage groove 15, and the plurality of rough surface bands 13 are composed of a plurality of irregularly arranged outward protruding rough particles 16; when the printing squeegee is scraped on the surface of the printing groove 14 during the screen printing, the silver paste will flow between the plurality of rough particles 16 on the rough surface band 13 under the action of the squeegee. Compared with the smooth surface of the screen, the arrangement of the rough surface band 13 can make the silver paste be pushed by the squeegee more regularly, so that the silver paste can flow better into the printing hole 12. At the same time, the rough surface band 13 can also store part of the silver paste on the end surface outside the ink storage groove 15 after a single scraping, so as to ensure the wet state of the silver paste and prevent it from drying and evaporating. In subsequent multiple scrapings, the silver paste can also be replenished in time, thereby improving the efficiency of printing and the fullness of the screen lines.

[0052] Embodiment two:

[0053] A high-strength full-opening nickel alloy screen, based on the screen in embodiment one, a further embodiment is made, a plurality of concentrated grooves 23 of different sizes and depths are irregularly arranged between the plurality of flow guide grooves 22 on the end surface of the rough surface band 13, and a plurality of first flow-through grooves 24 of different widths are connected between the plurality of concentrated grooves 23 and between the concentrated grooves 23 and the flow guide grooves 22.

[0054] Specifically, the plurality of downwardly recessed concentrated grooves 23 and the first flow-through grooves 24 form a network-shaped silver paste flow-through channel, which can not only ensure the overall surface roughness of the rough surface band 13, but also enable the silver paste to flow better, and can better store the silver paste temporarily after printing, thereby further ensuring the wet state of the silver paste and improving the printing quality.

[0055] It should be noted that the concentration groove 23 can be circular, square or other shapes, the size and depth of the concentration groove 23 and the arrangement are set by the actual situation; and the plurality of first flow grooves 24 are arranged by the actual situation.

[0056] In the embodiment, the plurality of printing holes 12 are provided as the second grid hole surface 19 with the inner wall of the cross section in the shape of a circular arc, one end of the second grid hole surface 19 is a small-diameter end, the other end is a large-diameter end, the small-diameter end is on the S surface, and the large-diameter end is on the P surface, and the overall width of the printing hole 12 is between 5um and 15um.

[0057] Specifically, when the silver paste is scraped into the second grid hole surface 19, the arrangement of the inner wall of the second grid hole surface 19 in the shape of a circular arc makes the silver paste flow more smoothly, and the design of the circular arc has a smooth arc surface transition between the grid line and the hole wall when the screen is withdrawn outward, which can more smoothly complete the stripping process, so that the grid line as a whole is more full and flat, further reducing the occurrence of grid line gaps, irregular shapes and the like, so that the efficiency of the battery is improved.

[0058] Embodiment three:

[0059] A high-strength full-opening nickel alloy screen, on the basis of the screen in embodiment one, the plurality of printing holes 12 are provided as the third grid hole surface 21 with the cross section in the shape of a waist surface tower, one end of the third grid hole surface 21 is a small-diameter end, the other end is a large-diameter end, the small-diameter end is on the S surface, and the large-diameter end is on the P surface, but the small-diameter end and the large-diameter end are transitioned by a smooth curved arc line, and a shape similar to a rectangle is formed at the large-diameter end, and the overall width of the printing hole 12 is between 5um and 15um.

[0060] Specifically, when the silver paste is scraped, the silver paste will enter from the small-diameter end of the third grid hole surface 21, and then deposit and form on the end surface of the battery end at the large-diameter end of the third grid hole surface 21, and since the large-diameter end and the small-diameter end are transitioned by a smooth curved arc line, the formed grid line can be stripped by using the arc line surface transition when the screen is withdrawn outward, at this time, since the large-diameter end is in the shape of a rectangle, the basic performance of the grid line can be guaranteed, and the silver paste in the arc surface area can be smoothly stripped, and will not be damaged, further avoiding the occurrence of grid line gaps and irregular shapes, and further improving the efficiency of the battery.

[0061] The rough surface belt 13 is composed of a plurality of curved arc grooves 25 in a single direction, a plurality of second flow grooves 26 are arranged between the plurality of arc grooves 25 in a staggered manner, and the plurality of second flow grooves 26 are directly connected with the ink storage groove 15. In this example, the plurality of downward concave arc grooves 25 cooperate with the second flow grooves 26 to form a rough surface on the rough surface belt 13 while forming a silver paste flow channel that overflows in a single direction. This arrangement aims to guide the silver paste to flow in the direction when the doctor blade is scraped in the direction, thereby improving the flow efficiency and further ensuring the quality of the grid line formation.

[0062] It should be noted that the arc direction of the arc groove 25 is set according to the direction of the doctor blade movement, and the depth, size and positional relationship between the arc grooves 25 can be set according to actual needs to achieve the purpose of rapid aggregation and flow of silver paste.

[0063] Example Four:

[0064] A processing technology of a high-strength full-opening nickel alloy screen, the specific process flow is as follows:

[0065] Step one:

[0066] Substrate manufacturing: select a substrate of appropriate size, and then use photoetching and electroplating process. First, coat photoresist on the surface of the substrate, transfer the designed pattern to the photoresist through photoetching process to form a photoresist pattern. Then electroplating is carried out in the opening area of the photoresist pattern to make metal deposit in the opening area to form an electroformed pattern. Finally, the photoresist is removed to obtain the required electroformed pattern area.

[0067] Step two:

[0068] Preparation of electroforming solution: mix nickel sulfate 75-125 g / L, cobalt sulfate 20-30 g / L, nickel chloride 15-25 g / L, boric acid 20-30 g / L, citric acid 10-20 g / L, and additives 30-60 g / L in sequence to form an electroforming solution.

[0069] Among them, nickel sulfate is the main nickel source in the electroforming solution, providing nickel ions for electrodeposition. Cobalt sulfate is used to improve the hardness and wear resistance of the electroformed layer, and nickel chloride can improve the conductivity and dispersion ability of the electroforming solution, making the electroforming process more stable. Therefore, after the respective corresponding grams per liter standard is met, the mass ratio of nickel sulfate to nickel chloride is (4-6):1, and the mass ratio of nickel sulfate + nickel chloride to cobalt sulfate is (4-6):1.

[0070] In order to prevent the PH value from having adverse effects on the electroforming process, the PH value of the electroforming solution is controlled between 3.5-4.5, which is achieved by adjusting the ratio of boric acid and citric acid, and the mass ratio of boric acid to citric acid is controlled between (1.5-2.5):1; among them, boric acid is used as a buffer to stabilize the PH value of the electroforming solution, and citric acid is used as a complexing agent to improve stability and dispersibility.

[0071] The additives include a chelating agent: sodium gluconate 5-20 g / L, an active agent: sodium dodecyl sulfate, sodium amino sulfate 10-50 g / L, and cyclodextrin 10-50 mg / L, so as to further improve the stability of the electroforming solution, improve the utilization rate of metal ions, reduce the surface tension of the solution, improve the wettability and dispersibility of the solution, and make the distribution of metal ions more uniform during electroforming.

[0072] Step three:

[0073] Electrochemical deposition electroforming: the substrate is placed in the electroforming solution, and the base nickel alloy body is obtained by electroforming and demolding treatment. During electroforming, the voltage is 20-30 V, the current density is 4-10 A / dm2, and the electroforming is carried out at a constant temperature of 40-60℃ without interruption. The time is 2-10 h, and the corresponding parameters are adjusted according to the actual situation to ensure the effect of electroforming.

[0074] Step four:

[0075] S4: ink tank and rough surface forming: the ink tank and rough surface pattern is drawn on the body by alignment and etching, and then the ink tank and rough surface are formed by the above-mentioned electroforming step to obtain the finished nickel alloy body. In this step, the alignment and etching method can ensure the overall precision, and the secondary electroforming method can ensure that the ink tank and rough surface structure can be integrally formed.

[0076] Step five:

[0077] Screen detection:

[0078] The microstructure of the nickel alloy screen is detected by optical detection technology;

[0079] The detection content includes size precision detection such as line width, pitch, aperture, and profile; surface quality detection such as surface roughness, surface defects, and surface contamination; microstructure detection such as grain size detection, phase composition analysis, and microstructure observation; and after ensuring its qualification, it is used.

[0080] Comparative example:

[0081] Reference to Figure 9 , attached Figure 10The two figures are the micrographs of the printed grid lines under the same height of the printing selected by the present comparative example, the traditional screen printing and the present full opening screen printing after printing;

[0082] The attached Figure 9 The printing micrograph of the traditional screen printing can be seen that the grid line as a whole collapses after the screen printing is lifted outward, the top of the grid line as a whole is uneven, at the same time, the bottom is also greatly depressed, and the width of the grid line as a whole reaches 11-15um, which will greatly reduce the performance of the battery, the collapse of the grid line will not improve the performance, but also waste more silver paste and increase the production cost, in addition, the traditional screen printing is stacked by multiple plates or has a mesh structure, and the printing life is only 50-70 million times;

[0083] The attached Figure 10 The printing micrograph of the present full opening screen printing can be seen that the grid line as a whole has a better shape, is more narrow and thin, and has no collapse on the surface, and the depression amplitude of the bottom is greatly reduced, and the width of the grid line as a whole can be between 8-11um, so that the performance of the whole battery is greatly increased compared with the traditional screen printing under the same silver paste, and the production cost is greatly reduced, and since the present application has only one high-strength nickel alloy screen plate as the main body, the printing life can reach 80-100 million times.

[0084] As some terms are used in the description and claims, those skilled in the art can understand that hardware manufacturers may use different names to refer to the same component. The description and claims of the present application do not distinguish components by name, but by the functional difference of the components. As mentioned throughout the description and claims, "including" is an open term, which should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problems within a certain error range and basically achieve the technical effects.

[0085] It should be noted that the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusions, so that the goods or systems including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such goods or systems. Without more limitations, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the goods or systems including the element.

[0086] The foregoing description illustrates and describes several preferred embodiments of the present application. However, it is to be understood that the application is not limited to the precise forms described, and that changes can be made therein without departing from the scope of the present application as defined in the appended claims.

Claims

1. A high strength, all open nickel alloy mesh, comprising a substrate (10), characterized in that, The substrate (10) is made of nickel alloy material after electroforming process, the end face of the substrate (10) is provided with downward recessed printing groove (14), the recessed surface of the printing groove (14) is S surface, the S surface of the printing groove (14) is provided with a plurality of full opening and length unlimited printing holes (12), the overall width of the printing hole (12) is between 5um-15um, a plurality of the printing hole (12) is provided with rough surface belt (13) on the printing groove (14) to improve the printing fullness, the outside of the printing hole (12) is also provided with a plurality of ink storage groove (15) on the S surface of the printing groove (14), a plurality of the ink storage groove (15) can be connected to be provided with a plurality of flow guide groove (22), the flow guide groove (22) is used for connecting each ink storage groove (15) while increasing the roughness of the rough surface belt (13).

2. A high strength, fully open, nickel alloy mesh according to claim 1, wherein, The plurality of the flow guide groove (22) is also provided with a plurality of concentration groove (23) with different recess depths outside the rough surface belt (13), a plurality of the concentration groove (23) and the concentration groove (23) and the flow guide groove (22) can be staggered and communicated to be provided with a plurality of first flow channel (24).

3. A high strength, fully open, nickel alloy mesh according to claim 2, wherein, The rough surface belt (13) can also be composed of a plurality of curved arc surface grooves (25) in a single direction, a plurality of the arc surface grooves (25) and the plurality of ink storage grooves (15) are communicated to be provided with a plurality of second flow channels (26).

4. The high-strength, fully open, nickel alloy mesh of claim 1, wherein, The printing hole (12) can form a plurality of down notch grid holes, and the inner wall of the grid hole can form a plurality of different curvature guide arc surfaces.

5. The high-strength, fully open, nickel alloy mesh of claim 1, wherein, The substrate (10) is provided with a buffer area (13) outside, the buffer area (13) is provided with a frame (11) outside, the frame (11) and the buffer area (13) are tensioned and connected with polyester cloth (20).

6. A process for making a high strength, all open nickel alloy mesh, characterized in that, The process flow is as follows: S1: grid line forming: selecting appropriate metal sheet conductive material as substrate, using photoetching method to draw grid line pattern area on the substrate; S2: preparation of electroforming solution: 75-125g / L of nickel sulfate, 20-30g / L of cobalt sulfate, 15-25g / L of nickel chloride, 20-30g / L of boric acid, 10-20g / L of citric acid, 30-60g / L of additives, etc. are mixed in sequence to form electroforming solution; S2.1: additives include chelating agent, active agent and cyclodextrin; S3: electrochemical deposition electroforming: placing the substrate in the electroforming solution, forming by electroforming, demolding treatment to obtain the basic nickel alloy version body; S3.1: during electroforming, voltage 20-30V, current density 4-10A / dm2, constant temperature 40-60℃, uninterrupted supplement of electroforming solution, time 2-10h; S4: ink storage groove and rough surface forming: forming ink storage groove and rough surface pattern on the version body by aligning and etching, then using the above electroforming step to form ink storage groove and rough surface, to obtain finished nickel alloy version body; S5: screen detection: using optical detection technology to detect the microstructure of the nickel alloy screen, to ensure that the size accuracy, surface quality, etc. meet the requirements.

7. The process for processing a high strength all open nickel alloy mesh according to claim 6, wherein, The mass ratio of the nickel sulfate to the nickel chloride in the S2 is (4-6):1, and the mass ratio of the nickel sulfate + the nickel chloride to the cobalt sulfate is (4-6):

1.

8. The process for processing a high strength all open nickel alloy mesh according to claim 6, wherein, The pH value of the electroforming solution in the S2 is between 3.5 and 4.5, which is achieved by adjusting the proportion of boric acid and citric acid, and the mass ratio of the boric acid to the citric acid is controlled to be (1.5-2.5):

1.

9. The process for processing a high strength all open nickel alloy mesh according to claim 6, wherein, The chelating agent in the S2.1 is 5-20 g / L, the active agent is 10-50 g / L, and the cyclodextrin is 10-50 mg / L.

10. The process for processing a high strength all open nickel alloy mesh according to claim 6, wherein, The chelating agent is sodium gluconate, and the active agent is sodium dodecyl sulfate and sodium amino sulfate.

Images