Screen plate tension adjusting structure

Abstract

The utility model discloses a screen tension adjusting structure, which belongs to the field of experimental instruments and comprises a screen, a grid line area is arranged in the middle of the screen, blank areas are arranged on two sides of the grid line area, tension reducing structures are arranged on the blank areas, and each tension reducing structure comprises a tension reducing hole penetrating through the screen in the thickness direction. The tension reducing holes can damage the continuity of the surface of the screen plate, so that the tension of the surrounding area is reduced, the tension reducing holes are formed in the area outside the grid line area, the tension of the edge area of the battery piece can be reduced, the tension of the whole surface of the battery piece tends to be uniform, the consistency of the printing effect is improved, and the problem that in the prior art, the printing efficiency is high is solved. And as the tension at different positions of the surface of the battery piece is different, the consistency of the printing effect is poor, and the quality of the battery piece is influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to an experimental apparatus, in particular to a mesh plate tension adjusting structure. BACKGROUND

[0002] In the production process of the battery piece, the surface of the battery piece needs to be printed with grid lines. In the prior art, the surrounding part of the battery piece is fixed, and then the printing device directly prints on the surface of the battery piece. However, due to the characteristics of the thin piece structure, the tension at the middle position is smaller than the tension at the peripheral position, which leads to different printing effects at different positions on the surface of the battery piece during printing, and it is difficult to maintain the consistency of the printing effect, thereby affecting the quality of the battery piece.

[0003] For example, a method for step-by-step printing of a polycrystalline battery piece and a step-by-step printing of a polycrystalline battery piece are disclosed in Chinese patent documents with publication number CN107146825A. The polycrystalline battery piece has mutually perpendicular main grid lines and auxiliary grid lines printed on the front surface. The height of the main grid lines is 8um, and the height of the auxiliary grid lines is 14um. The overlap degree of the main grid lines and the auxiliary grid lines is 0.12um. The disadvantage of this patent is that the tension at the middle position of the battery piece surface is smaller than the tension at the edge position during the printing process, which leads to poor consistency of the printing effect and affects the quality of the battery piece. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses to overcome the problem that the tension at different positions of the battery piece surface is different in the prior art, which leads to poor consistency of the printing effect and affects the quality of the battery piece. A mesh plate tension adjusting structure is provided, which can adjust the tension at different positions of the battery piece and improve the consistency of the printing effect.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model discloses a mesh plate tension adjusting structure, which comprises a mesh plate, a grid line area is arranged in the middle of the mesh plate, blank areas are arranged on both sides of the grid line area, a tension reducing structure is arranged on the blank area, and the tension reducing structure comprises a tension reducing hole penetrating through the mesh plate in the thickness direction.

[0007] The tension reducing hole can destroy the continuity of the surface of the mesh plate, thereby reducing the tension of the surrounding area. By arranging the tension reducing hole in the area outside the grid line area, the tension of the edge area of the battery piece can be reduced, so that the tension of the entire surface of the battery piece tends to be uniform, and the consistency of the printing effect is improved.

[0008] As preferred, the tension reducing structure further comprises a tension reducing slit. The tension reducing slit has a smaller tension reducing effect compared with the tension reducing hole, so that when the tension reducing hole is arranged, if the tension distribution still has a small gap with the demand target, the tension reducing slit can be used to fine tune, thereby improving the accuracy of tension adjustment.

[0009] As preferred, the tension reducing slit comprises a longitudinal slit arranged along the length direction of the screen plate and a transverse slit arranged along the width direction of the screen plate. Through the two different direction slits, the tension of the screen plate in different directions can be further adjusted.

[0010] As preferred, the tension reducing holes on the two side blank areas are arranged symmetrically about the symmetry axis of the screen plate.

[0011] As preferred, the grid line area is provided with a reinforcing structure. The reinforcing structure can improve the tension of the grid line area, and also has the effect of balancing the tension at different positions.

[0012] As preferred, the reinforcing structure comprises a reinforcing rib arranged along the length direction of the screen plate.

[0013] As preferred, the reinforcing structure comprises a reinforcing sheet, and the length direction of the reinforcing sheet is consistent with the length direction of the screen plate.

[0014] As preferred, the tension reducing hole comprises a plurality of unit screen holes. Through the plurality of unit screen holes to form the tension reducing hole, the adjustment of the tension reducing effect can be facilitated, and after testing, if the current tension reducing effect has not reached the target value, the tension reducing effect can be further improved by increasing the unit screen holes.

[0015] As preferred, the tension reducing hole comprises a plurality of strip-shaped holes, and the plurality of strip-shaped holes are arranged at intervals in the width direction of the screen plate.

[0016] Therefore, the utility model has the following beneficial effects: (1) the tension of the edge area of the battery piece can be reduced, so that the tension of the whole surface of the battery piece tends to be uniform, thereby improving the consistency of the printing effect; (2) after testing, if the current tension reducing effect has not reached the target value, the tension reducing effect can be further adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model embodiment one.

[0018] Figure 2 is a structural schematic diagram of the utility model embodiment two.

[0019] Figure 3 is a structural schematic diagram of the utility model embodiment three.

[0020] Figure 4Is a structural schematic diagram of the embodiment four of the utility model.

[0021] Figure 5 Is a structural schematic diagram of the embodiment five of the utility model.

[0022] Figure 6 Is a structural schematic diagram of the embodiment six of the utility model.

[0023] Figure 7 Is a structural schematic diagram of the embodiment seven of the utility model.

[0024] In the drawing: grid line area 1 blank area 2 reduced tension hole 3 reduced tension slit 4 longitudinal slit 41 transverse slit 42. CONCRETE IMPLEMENTATION

[0025] The utility model will be further described in combination with the specific implementation and the accompanying drawings.

[0026] Embodiment one, as Figure 1 shown, a kind of net plate tension adjustment structure, including net plate, the middle part of the net plate is equipped with grid line area 1, blank area 2 is equipped in the two sides of grid line area 1, reduced tension structure is equipped on blank area 2, and the reduced tension structure includes the reduced tension hole 3 that is through net plate in thickness direction.

[0027] The overall shape of the net plate is rectangular, and in the embodiment, the four reduced tension holes 3 are respectively located near the four corners of the rectangular net plate. The four reduced tension holes 3 are symmetrically arranged in the left-right direction and the up-down direction of the net plate. The shape of the reduced tension hole 3 is circular.

[0028] In conventional design, there is no reduced tension structure on the net plate. According to the test, the tension at the middle position of an existing battery piece net plate is about 11N, and the tension at the edge position on both sides is about 25N. In the actual printing process, due to the different tensions, the consistency after printing is poor. After improving the battery piece net plate to the structure in the embodiment, the tension at the middle position is about 12N, and the tension at the same position near the edge on both sides is about 14N, and the consistency of the battery piece after printing in the embodiment is good. Therefore, the improvement of the embodiment improves the uniformity of the tension and improves the quality of the battery piece.

[0029] Embodiment two, as Figure 2 shown, a kind of net plate tension adjustment structure, including net plate, the middle part of the net plate is equipped with grid line area 1, blank area 2 is equipped in the two sides of grid line area 1, reduced tension structure is equipped on blank area 2, and the reduced tension structure includes the reduced tension hole 3 that is through net plate in thickness direction.

[0030] The overall shape of the mesh plate is rectangular. In this embodiment, there are four tension-reducing holes 3, which are located near the four corners of the rectangular mesh plate. The four tension-reducing holes 3 are symmetrically arranged along both the left-right and up-down directions of the mesh plate. The shape of the tension-reducing holes 3 is circular.

[0031] The tension-reducing structure also includes a tension-reducing slit 4, which is located near the tension-reducing hole 3 and is formed by cutting on the mesh plate. During the cell processing, the tension-reducing hole 3 is first processed, and then tension tests are performed at various locations on the cell. If the test results show that the tension at some locations is still too high, a tension-reducing slit 4 is set at the corresponding location for further tension reduction.

[0032] In this embodiment, before setting the tension reduction slit 4, according to the test, the tension value at the edge of the battery cell is still larger than the tension value at the middle position of the battery cell. Therefore, it is necessary to add the tension reduction slit 4 to further balance the tension at different positions.

[0033] When mass-producing solar cells, only one standard solar cell needs to be tested for tension before and after processing, and the number of tension-reducing slits 4 is determined accordingly. Subsequent solar cells are mass-produced according to the determined values.

[0034] Example 3, as Figure 3 As shown, a tension adjustment structure for a mesh plate includes a mesh plate, a grid line area 1 in the middle of the mesh plate, blank areas 2 on both sides of the grid line area 1, and a tension reduction structure on the blank areas 2. The tension reduction structure includes tension reduction holes 3 penetrating the mesh plate in the thickness direction.

[0035] The overall shape of the mesh plate is rectangular. In this embodiment, there are four tension-reducing holes 3, which are located near the four corners of the rectangular mesh plate. The four tension-reducing holes 3 are symmetrically arranged along both the left-right and up-down directions of the mesh plate. The shape of the tension-reducing holes 3 is circular.

[0036] The tension-reducing structure also includes tension-reducing slits 4, which are located near the tension-reducing holes 3 and are formed by cutting on the mesh plate. The tension-reducing slits 4 include longitudinal slits 41 along the length of the mesh plate and transverse slits 42 along the width of the mesh plate. The positions of the tension-reducing slits 4 are axially symmetrical in both the left-right and up-down directions of the mesh plate.

[0037] During the cell processing, tension-reducing holes 3 are first machined, and then tension tests are performed at various locations on the cell. If the test results show that the tension at some locations is still too high, tension-reducing slits 4 are set at the corresponding locations for further tension reduction.

[0038] In the tension test, the tension in the longitudinal direction and the tension in the transverse direction are tested at the same time, and different numbers of longitudinal slits 41 and transverse slits 42 are set according to the test structure. When multiple longitudinal slits 41 or transverse slits 42 need to be set, step-by-step testing can be performed, that is, only one tension-reducing slit 4 is newly added each time, and tension testing is performed after each tension-reducing slit 4 is set until the result of the tension test reaches the target. In this embodiment, since the tension in the transverse direction of the edge of the battery piece is greater than the tension in the longitudinal direction before the tension-reducing slit 4 is set, four transverse slits 42 are set according to the results of multiple tests.

[0039] When batch production of battery pieces is performed, only the tension test before and after processing of a standard battery piece needs to be performed, and the number of tension-reducing slits 4 is determined in sequence, and subsequent battery pieces are batch-processed according to the determined value.

[0040] In the tension test, the tension in the longitudinal direction and the tension in the transverse direction are tested at the same time, and different numbers of longitudinal slits 41 and transverse slits 42 are set according to the test structure. When multiple longitudinal slits 41 or transverse slits 42 need to be set, step-by-step testing can be performed, that is, only one tension-reducing slit 4 is newly added each time, and tension testing is performed after each tension-reducing slit 4 is set until the result of the tension test reaches the target. In this embodiment, since the tension in the transverse direction of the edge of the battery piece is greater than the tension in the longitudinal direction before the tension-reducing slit 4 is set, four transverse slits 42 are set according to the results of multiple tests. Figure 4 As shown in FIG. 4, a mesh plate tension adjustment structure includes a mesh plate, a grid line area 1 is arranged in the middle of the mesh plate, blank areas 2 are arranged on both sides of the grid line area 1, a tension-reducing structure is arranged on the blank area 2, and the tension-reducing structure includes tension-reducing holes 3 that penetrate through the mesh plate in the thickness direction.

[0041] The mesh plate has a rectangular overall shape, and the four groups of tension-reducing holes 3 are arranged at positions close to the four corners of the mesh plate. Each group of tension-reducing holes 3 includes a plurality of unit mesh holes.

[0042] Before batch processing of battery pieces is performed, a standard battery piece for testing the number of unit mesh holes needs to be processed first. When the standard battery piece is processed, only one unit mesh hole is processed at a time, and the unit mesh holes are added one by one. After each unit mesh hole is added, a tension test is performed. With each newly processed unit mesh hole, the tension at the edge position of the battery piece decreases until the tension at the edge position of the battery piece meets the needs, and the number of unit mesh holes required by the battery piece is determined. In subsequent batch processing, the test results of the standard battery piece are followed, and no further testing is required.

[0043] Specifically, in this embodiment, the plurality of unit mesh holes of each group of tension-reducing holes 3 are arranged in a 2*3 rectangular array. The four groups of tension-reducing holes 3 are arranged symmetrically in the left-right direction and the up-down direction of the mesh plate. The shape of the unit mesh hole is circular. The distance between adjacent unit mesh holes is not more than 2 mm to ensure the structural strength and avoid tension changes caused by damage to the connection between the unit mesh holes.

[0044] As shown in FIG. 5, a mesh plate tension adjustment structure includes a mesh plate, a grid line area 1 is arranged in the middle of the mesh plate, blank areas 2 are arranged on both sides of the grid line area 1, a tension-reducing structure is arranged on the blank area 2, and the tension-reducing structure includes tension-reducing holes 3 that penetrate through the mesh plate in the thickness direction. Figure 5As shown, a tension adjustment structure for a mesh plate includes a mesh plate, a grid line area 1 in the middle of the mesh plate, blank areas 2 on both sides of the grid line area 1, and a tension reduction structure on the blank areas 2. The tension reduction structure includes tension reduction holes 3 penetrating the mesh plate in the thickness direction.

[0045] The overall shape of the mesh plate is rectangular. There are four sets of tension-reducing holes 3, which are respectively located near the four corners of the mesh plate. Each set of tension-reducing holes 3 includes several strip holes, which are spaced apart in the width direction of the mesh plate, and the length direction of the strip holes is the same as the length direction of the mesh plate.

[0046] Before mass production of solar cells, a standard solar cell needs to be fabricated to test the number of cell mesh openings. During the fabrication of the standard cell, only one slot is fabricated at a time, and slots are added gradually. After each addition, a tension test is performed. With each newly fabricated slot, the tension at the edge of the cell decreases until the tension at the edge meets the requirements. Once this is achieved, the required number of cell mesh openings for the solar cell is determined. Subsequent mass production follows the test results of the standard cell, eliminating the need for further testing.

[0047] Specifically, each group of tension-reducing holes 3 comprises three parallel strip-shaped holes. The four groups of tension-reducing holes 3 are axially symmetrically arranged in both the left-right and up-down directions of the mesh plate. The shape of the unit mesh holes is circular. The distance between adjacent unit mesh holes does not exceed 2mm to ensure structural strength and avoid tension changes caused by damage at the connection points between unit mesh holes.

[0048] Example 6, as Figure 6 As shown, a tension adjustment structure for a mesh plate includes a mesh plate, a grid line area 1 in the middle of the mesh plate, blank areas 2 on both sides of the grid line area 1, and a tension reduction structure on the blank areas 2. The tension reduction structure includes tension reduction holes 3 penetrating the mesh plate in the thickness direction.

[0049] The overall shape of the mesh plate is rectangular. In this embodiment, there are four tension-reducing holes 3, which are located near the four corners of the rectangular mesh plate. The four tension-reducing holes 3 are symmetrically arranged along both the left-right and up-down directions of the mesh plate. The shape of the tension-reducing holes 3 is circular.

[0050] The tension-reducing structure also includes tension-reducing slits 4, which are located near the tension-reducing holes 3 and are formed by cutting on the mesh plate. The tension-reducing slits 4 include longitudinal slits 41 along the length of the mesh plate and transverse slits 42 along the width of the mesh plate. The positions of the tension-reducing slits 4 are axially symmetrical in both the left-right and up-down directions of the mesh plate.

[0051] The reinforcing structure is arranged on the grid line area 1, and the reinforcing structure includes reinforcing ribs arranged along the length direction of the screen plate. The reinforcing structure can improve the tension of the grid line area 1 and balance the tension at different positions.

[0052] In the battery piece processing, the tension holes 3 are first processed, and then the tension at each position of the battery piece is tested. If the tension at some positions is still too large in the test result, the tension is further reduced by arranging the tension cutting seam 4 at the corresponding position.

[0053] In the tension test, the tension in the longitudinal direction and the tension in the transverse direction are tested at the same time, and different numbers of longitudinal cutting seams 41 and transverse cutting seams 42 are arranged according to the test structure. When multiple longitudinal cutting seams 41 or transverse cutting seams 42 need to be arranged, step-by-step testing can be performed, that is, only one tension reduction cutting seam 4 is added each time, and tension testing is performed after each tension reduction cutting seam 4 is arranged until the tension test result reaches the target. In this embodiment, since the tension in the transverse direction of the edge of the battery piece is greater than the tension in the longitudinal direction before the tension reduction cutting seam 4 is arranged, four transverse cutting seams 42 are arranged according to the test results.

[0054] In the batch production of battery pieces, only the tension test before and after processing of a standard battery piece is needed, and the number of tension reduction cutting seams 4 is determined in sequence, and the subsequent battery pieces are batch processed according to the determined value.

[0055] As shown in Figure 7 A screen plate tension adjustment structure includes a screen plate, a grid line area 1 is arranged in the middle of the screen plate, blank areas 2 are arranged on both sides of the grid line area 1, a tension reduction structure is arranged on the blank area 2, and the tension reduction structure includes tension reduction holes 3 penetrating through the screen plate in the thickness direction.

[0056] The overall shape of the screen plate is rectangular, and in this embodiment, the four tension reduction holes 3 are respectively arranged near the four corners of the rectangular screen plate. The four tension reduction holes 3 are arranged in axial symmetry in the left-right direction and the up-down direction of the screen plate. The shape of the tension reduction hole 3 is circular.

[0057] The tension reduction structure further includes a tension reduction cutting seam 4, which is arranged near the tension reduction hole 3 and is formed by cutting the screen plate. The tension reduction cutting seam 4 includes longitudinal cutting seams 41 arranged along the length direction of the screen plate and transverse cutting seams 42 arranged along the width direction of the screen plate. The position of the tension reduction cutting seam 4 is also arranged in axial symmetry in the left-right direction and the up-down direction of the screen plate.

[0058] The reinforcing structure is arranged on the grid line area 1, and the reinforcing structure comprises reinforcing sheets arranged along the length direction of the screen plate. The length direction of the reinforcing sheets is consistent with the length direction of the screen plate. The reinforcing structure can improve the tension of the grid line area 1 and balance the tension at different positions.

[0059] During the processing of the battery piece, the tension holes 3 are processed first, and then the tension at each position of the battery piece is tested. If the tension at some positions is still too large in the test results, the tension cutting seams 4 are arranged at the corresponding positions to further reduce the tension.

[0060] During the tension test, the tension in the longitudinal direction and the tension in the transverse direction are tested at the same time, and different numbers of longitudinal cutting seams 41 and transverse cutting seams 42 are arranged according to the test results. When multiple longitudinal cutting seams 41 or transverse cutting seams 42 need to be arranged, step-by-step testing can be performed, that is, only one tension cutting seam 4 is added each time, and the tension test is performed after each tension cutting seam 4 is arranged until the test results reach the target. In this embodiment, since the tension in the transverse direction of the edge of the battery piece is greater than the tension in the longitudinal direction before the tension cutting seam 4 is arranged, four transverse cutting seams 42 are arranged according to the test results.

[0061] When the battery pieces are mass-produced, only the tension test of a standard battery piece before and after processing is needed, and the number of tension cutting seams 4 is determined in sequence. The subsequent battery pieces are mass-produced according to the determined value.

Claims

1. A tension adjustment structure for a mesh plate, comprising a mesh plate, wherein a grid area is provided in the middle of the mesh plate, and blank areas are provided on both sides of the grid area, characterized in that, The blank area is provided with a tension-reducing structure, which includes tension-reducing holes penetrating the mesh in the thickness direction; the tension-reducing structure also includes tension-reducing slits; the tension-reducing slits include longitudinal slits arranged along the length direction of the mesh and transverse slits arranged along the width direction of the mesh.

2. The mesh tension adjustment structure according to claim 1, characterized in that, The tension reduction holes on the blank areas on both sides are arranged symmetrically with the axis of symmetry of the screen plate as the axis.

3. The mesh tension adjustment structure according to claim 1, characterized in that, A reinforcing structure is provided on the grid line area.

4. The mesh tension adjustment structure according to claim 3, characterized in that, The reinforcing structure includes reinforcing ribs arranged along the length of the mesh plate.

5. The mesh tension adjustment structure according to claim 3, characterized in that, The reinforcing structure includes a reinforcing sheet, the length direction of which is consistent with the length direction of the mesh plate.

6. A mesh tension adjustment structure according to any one of claims 1-5, characterized in that, The tension-reducing holes include several unit mesh holes.

7. A mesh tension adjustment structure according to any one of claims 1-5, characterized in that, The tension-reducing holes include a plurality of strip-shaped holes, which are spaced apart in the width direction of the mesh plate.

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