Screen printing plate for BC battery piece printing

Abstract

The utility model discloses a screen printing plate for BC battery piece printing, which comprises a P area screen printing plate main body corresponding to a BC battery piece, the P area screen printing plate main body is provided with a plurality of parallel P area grid line holes, the BC battery piece is provided with a plurality of parallel N area grid lines, the bottom side of the P area screen printing plate main body is provided with a plurality of parallel grid line grooves corresponding to the N area grid lines, and the bottom side of the P area screen printing plate main body is provided with a plurality of N area grid line grooves corresponding to the N area grid lines. And the grid line grooves and the P-region grid line holes are parallel and are arranged on the bottom side of the P-region screen printing plate main body at intervals. When the screen printing plate is in contact with a battery piece, printing flatness and grid line shaping accuracy can be guaranteed, grid lines on the battery piece are prevented from being widened, the service life of the screen printing plate is prolonged, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screen printing, in particular to screen printing for BC battery piece. BACKGROUND

[0002] Screen printing technology has the advantages of simple process, large design space, and suitability for large-scale production, and has become a widely used technology in the electronic field. For example, in the field of solar cells, printing screens are important tools for printing electrodes of solar cells. A printing screen generally includes a screen frame and screen gauze stretched in the screen frame. Conductive paste is poured onto the screen, and a squeegee is used to move the conductive paste on the screen gauze, causing the conductive paste to be squeezed through the grid line holes on the screen gauze and onto the solar cell, forming a corresponding pattern on the solar cell to form the electrode of the solar cell. Topcon, H battery piece printing grid lines are printed on both sides, and BC battery piece printing only prints grid lines on one side, including grid lines and sub-grid lines, sub-grid lines include N area sub-grid lines and P area sub-grid lines, Figure 1 N area sub-grid lines, Figure 2 P area sub-grid lines, which are printed twice on the BC battery piece to form the overall sub-grid line pattern as shown in Figure 3 When N area grid lines are printed first and then P area grid lines are printed, the P area screen comes into contact with the battery piece, the N area grid lines will lift the P area screen, causing the P area screen to have ups and downs, affecting the shaping of the grid lines, resulting in the widening of the grid lines, and also affecting the service life of the P area screen. SUMMARY

[0003] To solve the technical problems existing in the prior art, the purpose of the present application is to provide a screen for BC battery piece printing, which can ensure smooth printing when in contact with the battery piece, accurate grid line shaping, avoid the widening of the grid lines on the battery piece, and prolong the service life of the screen.

[0004] To solve the above-mentioned technical problems, the technical scheme adopted by the present application is as follows: a screen for BC battery piece printing, including a P area screen body corresponding to the BC battery piece, a plurality of parallel P area grid line holes are arranged on the P area screen body, a plurality of parallel N area grid lines are arranged on the BC battery piece, a plurality of parallel grid line grooves corresponding to the N area grid lines are arranged on the bottom side of the P area screen body, and the grid line grooves are arranged on the bottom side of the P area screen body in parallel and at intervals with the P area grid line holes.

[0005] Preferably, the cross section of the grid line groove adopts a rectangular structure, and the width, length, and height of the grid line groove are all greater than those of the N area grid line.

[0006] Preferably, the cross section of the grid line groove adopts a semicircular structure or a trapezoidal structure, and the N area grid line is wrapped in the grid line groove.

[0007] Preferably, the top of the P-area grid line hole of the P-area screen plate body is provided with a conductive paste storage groove.

[0008] Preferably, the cross section of the conductive paste storage groove adopts a rectangular structure.

[0009] Preferably, the cross section of the conductive paste storage groove adopts an arc structure with an upward opening.

[0010] Preferably, the P-area grid line hole is used to print the P-area grid line on the BC battery piece by conductive paste, and the P-area grid line is parallel to and spaced from the N-area grid line.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The screen plate for printing the BC battery piece can ensure printing flatness when contacting the battery piece, can ensure accurate grid line shaping, can avoid widening of the grid line on the battery piece, can prolong the service life of the screen plate, and can reduce production cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the N-area auxiliary grid;

[0014] Figure 2 is a structural schematic view of the P-area auxiliary grid;

[0015] Figure 3 is a structural schematic view of the whole auxiliary grid;

[0016] Figure 4 is a structural schematic view of the P-area screen plate body and the BC battery piece separated in the embodiment one;

[0017] Figure 5 is a structural schematic view of the P-area screen plate body and the BC battery piece combined in the embodiment one;

[0018] Figure 6 is a structural schematic view of the BC battery piece after printing is completed;

[0019] Figure 7 is a structural schematic view of the P-area screen plate body and the BC battery piece separated in the embodiment two;

[0020] Figure 8 is a structural schematic view of the P-area screen plate body and the BC battery piece combined in the embodiment two;

[0021] In the drawing: 1, P-area screen plate body; 11, grid line groove; 12, P-area grid line hole; 13, conductive paste storage groove; 2, BC battery piece; 21, N-area grid line; 22, P-area grid line. DETAILED DESCRIPTION

[0022] Hereinafter, the present application will be further described in conjunction with the drawings and specific embodiments, it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] Embodiment one:

[0025] As shown in Figure 4 and Figure 5 , the screen for BC battery piece printing includes a P area screen body 1 corresponding to the BC battery piece 2, a plurality of parallel P area grid line holes 12 are arranged on the P area screen body 1, a plurality of parallel N area grid lines 21 are arranged on the BC battery piece 2, a plurality of parallel grid line grooves 11 corresponding to the N area grid lines 21 are arranged on the bottom side of the P area screen body 1, and the grid line grooves 11 are arranged on the bottom side of the P area screen body 1 in parallel and spaced apart from the P area grid line holes 12.

[0026] In actual printing, the P area grid line holes 12 lead into the conductive paste in the N area grid line 21 grid line groove 11 to print the BC battery piece 2 to form a P area grid line 22, as shown in Figure 6 , the P area grid line 22 is arranged in parallel and spaced apart from the N area grid line 21. It can ensure that the printing is flat when it contacts the battery piece, the grid line shaping is accurate, the grid line widening on the battery piece is avoided, the service life of the screen is prolonged, and the production cost is reduced.

[0027] The cross section of the grid line groove 11 adopts a rectangular structure, and the width, length and height of the grid line groove 11 are all greater than those of the N area grid line 21. It ensures that the N area grid line 21 does not contact the P area screen body 1, and it is convenient to manufacture the slot.

[0028] The cross section of the grid line groove 11 can also adopt a semicircular structure or a trapezoidal structure, and the N area grid line 21 is wrapped in the grid line groove 11. The semicircular structure or the trapezoidal structure is more convenient for slotting.

[0029] Embodiment two:

[0030] As shown in Figure 7 and Figure 8 , this embodiment is basically the same as embodiment one, except that a conductive paste storage groove 13 is arranged on the top of the P area grid line hole 12 of the P area screen body 1. It is convenient for the paste to enter.

[0031] The cross section of the conductive paste storage tank 13 adopts a rectangular structure. The manufacturing is convenient.

[0032] The cross section of the conductive paste storage tank 13 can also adopt an arc structure with an opening upward. The conductive paste can be prevented from accumulating into blocks, and the quality of screen printing is ensured.

[0033] The above-mentioned embodiments are only the preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A screen for printing of BC battery sheets, characterized by: The P area screen body (1) corresponding to the BC battery piece (2) is provided with a plurality of parallel P area grid line holes (12), the BC battery piece (2) is provided with a plurality of parallel N area grid lines (21), the bottom side of the P area screen body (1) is provided with a plurality of parallel grid line grooves (11) corresponding to the N area grid lines (21), and the grid line grooves (11) are parallel to and spaced apart from the P area grid line holes (12) and are arranged on the bottom side of the P area screen body (1).

2. The screen for BC cell printing according to claim 1, wherein: The cross section of the grid line groove (11) adopts a rectangular structure, and the width, length and height of the grid line groove (11) are all greater than those of the N area grid line (21).

3. The screen for BC cell printing according to claim 1, wherein: The cross section of the grid line groove (11) adopts a semicircular structure or a trapezoidal structure, and the N area grid line (21) is wrapped in the grid line groove (11).

4. The screen for BC cell printing according to claim 1, wherein: The top of the P area screen body (1) located at the P area grid line hole (12) is provided with a conductive paste storage groove (13).

5. The screen for BC cell printing according to claim 4, wherein: The cross section of the conductive paste storage groove (13) adopts a rectangular structure.

6. The screen for BC cell printing according to claim 4, wherein: The cross section of the conductive paste storage groove (13) adopts an arc structure with the opening upward.

7. The screen for BC cell printing according to claim 1, wherein: The P area grid line hole (12) is connected to the conductive paste to print the BC battery piece (2) to form the P area grid line (22), and the P area grid line (22) is parallel to and spaced apart from the N area grid line (21).

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