CN218701964U

CN218701964U - Screen printing plate suitable for solar cell printing

Info

Publication number: CN218701964U
Application number: CN202222614473.3U
Authority: CN
Inventors: 施忠林; 陈如龙; 赵杰; 王传路
Original assignee: Jiangsu Runyang Yueda Photovoltaic Technology Co Ltd
Current assignee: Jiangsu Runyang Yueda Photovoltaic Technology Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-24
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a half tone suitable for solar cell printing, include: metal film, gauze and metal screen frame; the metal film is provided with an electrode printing pattern, and the electrode printing pattern is arranged in the middle of the metal film; the gauze is connected with the metal film in a way of surrounding the circumferential direction of the metal film; the metal net frame is connected with the gauze in a way of surrounding the circumferential direction of the gauze; the electrode printing pattern comprises: a plurality of PAD points, a main grid connecting line and a plurality of gradual change lines; the PAD point is arranged on the main grid connecting line; the gradual change line is connected to the main grid connecting line and the PAD point. The utility model has simple structure, and the strength and the service life of the screen are superior to those of the traditional screen; the screen printing plate can freely design and adjust partial graphs of PAD points, can effectively adjust the contact surface connection of the partial graphs, and improves the welding performance; the screen printing plate replaces the traditional PVA resin photosensitive film or PI film with the metal film, and the problems of tension reduction, printing displacement and the like are not easy to generate during solid printing.

Description

Screen printing plate suitable for solar cell printing

Technical Field

The utility model relates to a solar cell makes technical field, concretely relates to half tone suitable for solar cell printing.

Background

Solar energy is a clean energy source and an inexhaustible renewable energy source for human beings, and solar photovoltaic is a research field which is very much concerned in recent years. In the photovoltaic industry, there is a constant theme to improve the photoelectric conversion efficiency and reduce the production cost of crystalline silicon solar cells. In recent years, it is becoming increasingly difficult to further improve the efficiency of the solar crystalline silicon cell by means of a conventional process alone, and the traditional screen printing grid line has poor linear uniformity, and simultaneously achieves the greatest effect under the large background of pursuing fine grids and considering welding spot weldability. The metal film screen solar cell technology can be matched with the existing technology to quickly realize thinner printing grid lines, improve the efficiency and reduce the cost, and can also improve the contact of welding spots.

The silk screen printing refers to that a silk screen is used as a plate base, and a silk screen printing plate with pictures and texts is manufactured by a photosensitive plate making method. The traditional screen printing plate for printing is prepared by uniformly coating PVA emulsion on a stainless steel wire mesh or a chemical fiber mesh, and then sequentially carrying out the steps of dry pattern exposure, development, drying and the like to prepare the required screen printing plate for printing. However, because the amount of expansion and contraction of the wire rod of this type of screen printing plate is great, along with the increase of printing life, the screen printing plate deformation volume progressively increases, easily produces the overprint skew problem with positive laser figure, and the fine figure adhesion is not good, and uses the durability poor. The problem of printing height fluctuation is easily caused by the existence of net knots in a traditional screen printing line area. Meanwhile, the mesh number of the screen printing plate of the traditional screen printing plate depends on the mesh number of the screen gauze, and the mesh number cannot be changed, and the local graphic design of the screen printing plate cannot be adjusted. Therefore, in order to solve the problems of the conventional printing screens, a new metal screen needs to be designed to solve the problems of the conventional screens.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an: aiming at the problems of the traditional screen printing plate, the metal screen printing plate which is simple in structure and suitable for solar cell printing is designed and provided, and the problems of the traditional screen printing plate are solved.

The utility model discloses a realize through following technical scheme:

a screen suitable for solar cell printing, the screen comprising: metal film, gauze and metal screen frame; the metal film is provided with an electrode printing pattern, and the electrode printing pattern is arranged in the middle of the metal film (namely the metal film surrounds the circumferential outer side of the electrode printing pattern); the gauze is connected with the metal film in a way of surrounding the circumferential direction of the metal film; the metal net frame is connected with the gauze in a way of surrounding the circumferential direction of the gauze; the electrode printing pattern comprises: a plurality of PAD points, a main grid connecting line and a plurality of gradual change lines; the PAD point is arranged on the main grid connecting line; the gradual change line is connected to the main grid connecting line and the PAD point.

Further, a screen suitable for solar cell printing: the gauze is polyester gauze.

Further, a screen suitable for solar cell printing: the metal film is a metal or alloy film.

Further, a screen suitable for solar cell printing: the metal film is formed by electroforming.

Further, a screen suitable for solar cell printing: the metal net frame is made of aluminum.

Further, a screen suitable for solar cell printing: the gradual change line is vertically connected with the main grid connecting line and the PAD point.

Further, a screen suitable for solar cell printing: the size of the gradual change line is gradually reduced from the connecting end to the far end.

The utility model has the advantages that:

(1) The utility model discloses a half tone suitable for solar cell printing, its simple structure, and the intensity and the life of half tone all are superior to traditional half tone.

(2) The utility model discloses a half tone suitable for solar cell printing can freely design adjustment PAD some figures, and the contact surface that can effectively adjust this part figure connects, improves welding performance. The PAD point position can be carved to form different design figures, the mesh number of different positions is adjusted, and the contact property and the height of a welding point are changed. And the printing line area has no net knots, and the printing height is smooth.

(3) The utility model discloses a half tone suitable for solar cell printing can freely adjust the mesh number of any position figure of half tone, controls the black volume of passing through of this part to adjust the height of this part figure.

(4) The utility model discloses an in the half tone suitable for solar cell printing to traditional PVA resin photosensitive film or PI membrane and wire net yarn have been replaced to the metallic film, and metallic film ductility will be less than PVA resin photosensitive film or PI membrane, is difficult for producing tension decline, printing displacement scheduling problem during solid printing.

(5) The utility model provides a half tone suitable for solar cell printing, it can freely adjust different mesh numbers on same territory, can solve the problem that a half tone realizes multi-parameter design through this structural design.

(6) The utility model discloses in design the gradual change line for by gradual change line and thread connecting wire's link to keeping away from the degressive structure of end gradually, it can prevent to break the line in welding process, can effectively solve the problem of breaking bars.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a screen suitable for printing a solar cell according to embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of an electrode printing pattern in a screen suitable for solar cell printing according to embodiment 1 of the present invention;

FIG. 3 is a partial enlarged view of portion A of FIG. 2;

fig. 4 is a flowchart of a manufacturing process of a screen suitable for printing a solar cell according to embodiment 2.

The labels in the figure are: the device comprises a metal film 1, a gauze 2, a metal screen frame 3, a material 4 for forming an electrode printing pattern, a metal bearing sheet 5, an electrode printing pattern 1-1, a PAD point 1-1-1, a main grid connecting line 1-1-2, a gradual change line 1-1-3, a connecting end 1-1-3-1 and a far end 1-1-3-2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships for convenience of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

Example 1

As shown in fig. 1 to 3, a screen suitable for solar cell printing, the screen comprising: a metal film 1 (alloy film), a polyester gauze 2 and a metal screen frame 3 (aluminum frame); an electrode printing pattern 1-1 is arranged on the metal film 1, and the electrode printing pattern 1-1 is arranged in the middle of the metal base plate 1, which can be understood that part of the metal film 1 surrounds the circumferential outer side of the electrode printing pattern 1-1; the polyester gauze 2 surrounds the circumferential direction of the metal film 1 and is connected with the metal film 1, namely the metal film 1 is positioned on the inner side of the polyester gauze 2; the metal net frame 3 is connected with the polyester net gauze 2 in a way of surrounding the circumferential direction of the polyester net gauze 2, and the polyester net gauze 2 is positioned on the inner side of the metal net frame 3; the electrode printing pattern 1-1 includes: a plurality of PAD points 1-1-1, main grid connecting lines 1-1-2 and a plurality of gradual change lines 1-1-3; the PAD point 1-1-1 is arranged on the main grid connecting line 1-1-2; the gradual change line 1-1-3 is vertically connected to the main grid connecting line 1-1-2 and the PAD point (1-1-1).

Preferably, the size of the gradual change line 1-1-3 is gradually reduced from the connecting end 1-1-3-1 to the end 1-1-3-2 away from the connecting end; the purpose of the design can prevent the wire breakage in the welding process and solve the problem of grid breakage.

Example 2

Providing a manufacturing process of the screen printing plate suitable for solar cell printing, which comprises the following steps:

as shown in fig. 4, firstly, a corresponding shielding material (i.e. a material 4 for forming an electrode printing pattern) is placed on a metal carrier sheet 5, then the shielding material of the excess portion is removed by exposure and development, then, a metal film 1 is formed on the metal carrier sheet 5 by electroforming, the metal film 1 formed by electroforming is peeled off from the metal carrier sheet 5, and then, a polyester gauze 2 and the peeled metal film 1 are screened on a metal screen frame 3 by using a screening technology, so as to form a required metal screen suitable for printing a solar cell.

The utility model discloses traditional PVA resin photosensitive film or PI membrane have been replaced with metallic film 1 for whole half tone intensity can improve, and the wearability of metallic film 1 itself is also more excellent simultaneously, is favorable to promoting the printing quality, improves the half tone life-span.

The above is that the preferred embodiment of the present invention is only used for explaining the present invention, and is not used for limiting the present invention. All obvious changes or variations led by the technical proposal of the utility model are still within the protection scope of the utility model.

Claims

1. A screen suitable for solar cell printing, the screen comprising: the metal screen comprises a metal film (1), a gauze (2) and a metal screen frame (3); an electrode printing pattern (1-1) is arranged on the metal film (1), and the electrode printing pattern (1-1) is arranged in the middle of the metal film (1); the gauze (2) surrounds the circumferential direction of the metal film (1) and is connected with the metal film; the metal net frame (3) surrounds the circumferential direction of the gauze (2) and is connected with the gauze; the electrode printing pattern (1-1) includes: a plurality of PAD points (1-1-1), main grid connecting lines (1-1-2) and a plurality of gradual change lines (1-1-3); the PAD point (1-1-1) is arranged on the main grid connecting line (1-1-2); the gradual change line (1-1-3) is connected to the main grid connecting line (1-1-2) and the PAD point (1-1-1).

2. The screen suitable for solar cell printing according to claim 1, wherein the screen (2) is a polyester screen.

3. The screen printing plate suitable for solar cell printing according to claim 1, wherein the metal film (1) is a metal or alloy film.

4. The screen suitable for solar cell printing according to claim 1 or 3, wherein the metal film (1) is formed by electroforming.

5. The screen printing plate suitable for solar cell printing as claimed in claim 1, wherein the metal screen frame (3) is made of aluminum.

6. The screen printing plate suitable for solar cell printing as claimed in claim 1, wherein the gradient line (1-1-3) is vertically connected with the main grid connection line (1-1-2) and the PAD point (1-1-1).

7. The screen printing plate suitable for solar cell printing as claimed in claim 1, wherein the size of the gradient (1-1-3) is gradually decreased from the connecting end (1-1-3-1) to the far end (1-1-3-2).

8. The screen printing plate suitable for solar cell printing as claimed in claim 1, wherein the PAD dots (1-1-1) can be designed into different patterns according to requirements, and the mesh number thereof can be adjusted according to requirements.