Sizing screen printing plate, sizing mechanism and battery string sizing equipment

Abstract

The utility model discloses a sizing screen printing plate, a sizing mechanism and battery string sizing equipment, the sizing screen printing plate comprises a sizing plate, the sizing plate is provided with at least one sizing area, and each sizing area can be divided into a first side area, a middle area and a second side area along a first direction, a plurality of meshes penetrating through the sizing plate are formed in the first side area, the middle area and the second side area; the area of each mesh of the middle region is smaller than the area of each mesh of the first side region and the second side region. The area of each mesh in the middle area of the sizing plate of the sizing screen is smaller than that of each mesh in the first side area and the second side area, and when the scraper assembly presses the screen, the mesh area of the middle area is basically the same as that of the first side area and that of the second side area; and therefore, the mesh glue outlet amount of the middle area is basically the same as the mesh glue outlet amount of the first side area and the second side area, and the overall gluing uniformity of the gluing screen printing plate is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell assembly production, and in particular to a gluing screen, a gluing mechanism, and a cell string gluing device. Background Art

[0002] After multiple battery cells are serially soldered to the solder ribbons, in order to ensure a reliable connection between the solder ribbons and the battery cells, it is usually necessary to apply glue to the solder ribbons through a glue application device. After the glue cures, the solder ribbons are bonded and fixed to the surface of the battery cells.

[0003] Existing glue-applying devices include a glue-applying screen and a scraper assembly. The glue-applying screen is provided with a mesh area, which is provided with a plurality of mesh holes of the same size distributed in an array. When applying glue, the scraper assembly presses down on the mesh area of ​​the glue-applying screen and moves horizontally to scrape the glue on the glue-applying screen into the mesh holes. The glue then flows through the mesh holes to the surface of the solder ribbon and the solar cell. However, during the actual glue-applying process, when the scraper assembly presses the screen, the deformation of the middle part of the screen is relatively large, while the deformation of the side parts of the screen is relatively small. This causes the mesh holes in the middle part of the mesh area to be larger in shape, while the mesh holes on the side parts of the mesh area are smaller in shape. As a result, each mesh hole in the middle part of the mesh area has a large amount of glue output, while the mesh holes on the side parts have a small amount of glue output, resulting in uneven glue application on the glue-applying screen. Utility Model Content

[0004] The purpose of the present application is to provide a glue applying screen to solve the problem of uneven glue application in the glue applying screen of the existing glue applying device; in addition, another purpose of the present application is to provide a glue applying mechanism including the glue applying screen and a battery string glue applying device including the glue applying mechanism.

[0005] To achieve this goal, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a sizing screen, which includes a sizing plate, wherein:

[0007] At least one gluing area is provided on the gluing plate, and each gluing area can be divided into a first side area, a middle area, and a second side area along a first direction, and a plurality of mesh holes penetrating the gluing plate are provided in the first side area, the middle area, and the second side area;

[0008] The area of ​​each mesh in the middle region is smaller than the area of ​​each mesh in the first side region and the second side region.

[0009] The area of ​​each mesh in the middle area of ​​the sizing plate of the sizing screen proposed in the present application is smaller than the area of ​​each mesh in the first side area and the second side area. When the scraper assembly presses the screen, the deformation of the middle area of ​​the screen is relatively large, that is, the mesh area of ​​the middle area of ​​the screen will increase, so that the mesh area of ​​the middle area is basically the same as the mesh area of ​​the first side area and the second side area, and thus the glue output of the mesh in the middle area is basically the same as the glue output of the mesh in the first side area and the second side area, thereby ensuring the overall uniformity of sizing of the sizing screen.

[0010] Optionally, a protrusion is provided on the bottom surface of the gluing plate, and each mesh hole passes through the gluing plate and the protrusion.

[0011] By providing a raised portion on the bottom surface of the glue-applying plate, when the raised portion on the glue-applying plate abuts or the gap is arranged above the current battery cell for glue application, there will be a gap between the glue-applying plate and the adjacent battery cell that has been glued that is approximately equal to the thickness of the raised portion, thereby avoiding the glue-applying plate from abutting against the adjacent battery cell that has been glued, and further avoiding the uncured glue on the adjacent battery cell that has been glued from adhering to the glue-applying plate, thereby ensuring the glue application quality of the glue screen.

[0012] Optionally, the raised portion includes a plurality of protrusions arranged in an array, and each protrusion is provided with a mesh.

[0013] By configuring the raised portion to include a plurality of protrusions arranged in an array, with a mesh hole provided on each protrusion, a gap is formed between the bottom surface of the glue-applying plate and the glue-applied battery cell during glue application, while reducing the contact area between the raised portion and the battery cell, thereby reducing the risk of the raised portion crushing the battery cell. Furthermore, the protrusions can also play a reinforcing role, which can reduce the deformation of the scraper assembly when pressing the screen to a certain extent, thereby ensuring the overall uniformity of glue application on the glue-applying screen.

[0014] Optionally, the plurality of bumps may be divided into a first end bump region, a middle bump region, and a second end bump region along the second direction, the first end bump region including at least one column of bumps, the middle bump region including multiple columns of bumps, and the second end bump region including at least one column of bumps, each column of bumps being arranged along the first direction;

[0015] Two adjacent rows of bumps in the middle bump area are staggered, and the first direction is perpendicular to the second direction.

[0016] By staggering the two adjacent columns of bumps in the middle bump area, the number of glue points can be reduced while taking into account the reliability of the connection between the battery cell and the solder ribbon, thereby reducing the amount of glue used.

[0017] Optionally, the second end bump region includes two columns of bumps, and a column spacing between the two columns of bumps in the second end bump region is smaller than a column spacing between the columns of bumps in the middle bump region.

[0018] By setting the column spacing between two columns of bumps in the second end bump area to be smaller than the column spacing between each column of bumps in the middle bump area, the connection strength between the soldering tape on the current battery cell corresponding to the second end bump area and the battery cell is improved.

[0019] Optionally, the raised portion includes a plurality of long convex ribs arranged in parallel and at intervals and extending along the second direction, and a plurality of mesh holes are arranged on each long convex rib at intervals along the second direction, and the second direction is perpendicular to the first direction.

[0020] By setting the raised portion as a plurality of long convex ribs extending along the second direction, and a plurality of mesh holes are arranged at intervals along the second direction on each long convex rib, a gap is formed between the bottom surface of the glue-applying plate and the glue-applied battery cell when applying glue, and another raised portion with a simple structure and easy processing is provided; and the long convex ribs can also play a reinforcing role, which can reduce the deformation of the scraper assembly when pressing the screen to a certain extent, which is conducive to ensuring the overall uniformity of glue application on the glue-applying screen.

[0021] Optionally, the mesh holes are any of long holes, round holes, square holes or special-shaped holes.

[0022] By setting the mesh holes to be any of long holes, round holes, square holes or special-shaped holes, a variety of mesh structures that are easy to process are provided.

[0023] Optionally, the mesh holes are long strip holes, and the length difference between each mesh hole in the middle area and the length of the mesh holes in the first side area and the second side area is in the range of 0.1 mm to 0.2 mm.

[0024] By setting the mesh holes as long strip holes and setting the difference between the length of the mesh holes in the middle area and the length of the mesh holes in the first side area and the second side area to 0.1mm~0.2mm according to the difference in deformation between the middle area and the two side areas during gluing, the overall uniformity of gluing on the gluing screen is further ensured.

[0025] Optionally, two gluing areas are spaced apart along the second direction on the gluing plate, the distance between the two gluing areas ranges from 10 mm to 20 mm, and the second direction is perpendicular to the first direction.

[0026] By arranging two adhesive application areas along the second direction on the adhesive application plate and setting the distance between the two adhesive application areas to 10mm to 20mm, the adhesive application plate can apply adhesive to two battery cells at the same time, thereby improving the adhesive application efficiency of the adhesive application plate.

[0027] Optionally, the height of the raised portion is 0.1 mm to 0.5 mm.

[0028] According to the glue application amount of each glue point in the specific glue application process, the height of the protrusion is set to 0.1mm to 0.5mm to ensure that the uncured glue on the adjacent glued battery cells will not stick to the glue application board.

[0029] In a second aspect, the present application further proposes a sizing mechanism, which includes a scraper assembly and the above-mentioned sizing screen, wherein:

[0030] The scraper assembly is arranged above the sizing screen, and the scraper assembly includes a drive assembly and a scraper. The drive end of the drive assembly is connected to the scraper, and the drive assembly is configured to drive the scraper to rise and fall and move laterally;

[0031] The drive assembly drives the scraper to descend and press against the glue plate and then move horizontally to scrape the glue on the glue plate into the mesh. The glue flows through the mesh to the surface of the solder strip and battery cell to be glued.

[0032] The cooperation of the scraper assembly and the glue screen realizes the automatic glue application to the battery cell; at the same time, the glue application of the glue screen is uniform, which ensures the glue application quality of the glue application mechanism.

[0033] In a third aspect, the present application further proposes a battery string gluing device, which includes a battery string conveying mechanism, a first gluing mechanism, a first curing mechanism, a flipping mechanism, a second gluing mechanism, and a second curing mechanism, wherein the first gluing mechanism and the second gluing mechanism are both the above-mentioned gluing mechanisms, wherein:

[0034] A first gluing station, a first curing station, a flipping station, a second gluing station, and a second curing station are sequentially arranged on a conveying path of the battery string conveying mechanism. The battery string conveying mechanism is configured to convey the battery string in a stepwise manner along the second direction.

[0035] The first glue applying mechanism is arranged above the first glue applying station, and is configured to apply glue to the front surface of the battery cell passing through the first glue applying station;

[0036] The first curing mechanism is disposed at the first curing station, and is configured to cure the glue points on the front surface of the battery cell passing through the first curing station;

[0037] The flipping mechanism is provided at the flipping station, and is configured to flip the battery string cured by the first curing mechanism at the flipping station so that the back sides of all battery cells in the battery string face upwards;

[0038] The second glue applying mechanism is arranged above the second glue applying station, and the second glue applying mechanism is configured to apply glue to the back side of the battery cell passing through the second glue applying station;

[0039] The second curing mechanism is disposed at the second curing station, and the second curing station is configured to cure the glue spots on the back side of the battery cell passing through the second curing station.

[0040] Through the cooperation of the battery string conveying mechanism, the first gluing mechanism, the first curing mechanism, the flipping mechanism, the second gluing mechanism and the second curing mechanism, automatic double-sided gluing and curing of the battery string are achieved; at the same time, the gluing uniformity of the first gluing mechanism and the second gluing mechanism is good, ensuring the gluing quality of the battery string.

[0041] Optionally, the mesh density of the gluing area of ​​the first gluing mechanism is greater than the mesh density of the gluing area of ​​the second gluing mechanism.

[0042] By setting the mesh density of the gluing area of ​​the first gluing mechanism to be greater than the mesh density of the gluing area of ​​the second gluing mechanism, the amount of glue used in the gluing on the back of the battery string is reduced while ensuring the connection reliability of the gluing part on the back of the battery string. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 3D schematic diagram of the sizing screen of the first sizing mechanism provided in an embodiment of the present application;

[0044] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0045] Figure 3 1 is a structural schematic diagram of the gluing area of ​​the gluing screen of the first gluing mechanism provided in an embodiment of the present application;

[0046] Figure 4 This is another structural schematic diagram of the gluing area of ​​the gluing screen of the first gluing mechanism provided in an embodiment of the present application;

[0047] Figure 5 It is a schematic diagram of the three-dimensional structure of the sizing screen of the second sizing mechanism provided in an embodiment of the present application.

[0048] Figures 1 to 5 The following reference numerals are included:

[0049] Glue plate 10 : glue application area 11 , first side area 110 , middle area 111 , second side area 112 , first end bump area 113 , middle bump area 114 , second end bump area 115 , mesh 12 , protrusion 13 , bump 130 . DETAILED DESCRIPTION

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] After multiple battery cells are serially soldered to the solder ribbons, in order to ensure a reliable connection between the solder ribbons and the battery cells, it is usually necessary to apply glue to the solder ribbons through a glue application device. After the glue cures, the solder ribbons are bonded and fixed to the surface of the battery cells.

[0052] Existing glue-applying devices include a glue-applying screen and a scraper assembly. The glue-applying screen is provided with a mesh area, which is provided with a plurality of mesh holes of the same size distributed in an array. When applying glue, the scraper assembly presses down on the mesh area of ​​the glue-applying screen and moves horizontally to scrape the glue on the glue-applying screen into the mesh holes. The glue then flows through the mesh holes to the surface of the solder ribbon and the solar cell. However, during the actual glue-applying process, when the scraper assembly presses the screen, the deformation of the middle part of the screen is relatively large, while the deformation of the side parts of the screen is relatively small. This causes the mesh holes in the middle part of the mesh area to be larger in shape, while the mesh holes on the side parts of the mesh area are smaller in shape. As a result, each mesh hole in the middle part of the mesh area has a large amount of glue output, while the mesh holes on the side parts have a small amount of glue output, resulting in uneven glue application on the glue-applying screen.

[0053] Therefore, in the first aspect, the present application proposes a sizing screen, see Figures 1 to 3 As shown, the sizing screen proposed in the embodiment of the present application includes a sizing plate 10, on which at least one sizing area 11 is provided. Each sizing area 11 is arranged along a first direction ( Figure 3 The sizing plate 10 can be divided into a first side area 110, a middle area 111 and a second side area 112. The first side area 110, the middle area 111 and the second side area 112 are all provided with a plurality of mesh holes 12 passing through the sizing plate 10; the area of ​​each mesh hole 12 in the middle area 111 is smaller than the area of ​​each mesh hole 12 in the first side area 110 and the second side area 112.

[0054] When the present application is used to apply glue to battery cells after string welding, the size of the glue application area 11 matches the size of the battery cell to be glued.

[0055] When applying glue, glue is stored on the glue applying plate 10. The scraper assembly is used to scrape the glue applying plate 10, and the glue on the glue applying plate 10 flows through the mesh 12 to the surface of the solder strip and the battery cell to be glued, so as to form glue points on the surface of the solder strip to be glued. The first direction is perpendicular to the extension direction of the solder strip on the battery cell to be glued.

[0056] The area of ​​each mesh hole 12 in the middle region 111 on the sizing plate 10 of the sizing screen proposed in the present application is equal, the area of ​​each mesh hole 12 in the first side region 110 and the second side region 112 is equal, and the area of ​​each mesh hole 12 in the middle region 111 is smaller than the area of ​​each mesh hole 12 in the first side region 110 and the second side region 112. When the scraper assembly presses the screen, the deformation of the middle region 111 of the screen is relatively large, that is, the area of ​​the mesh holes 12 in the middle region 111 of the screen will increase, so that the area of ​​the mesh holes 12 in the middle region 111 is basically the same as the area of ​​the mesh holes 12 in the first side region 110 and the second side region 112, and thus the glue output of the mesh holes 12 in the middle region 111 is basically the same as the glue output of the mesh holes 12 in the first side region 110 and the second side region 112, thereby ensuring the overall uniformity of sizing of the sizing screen.

[0057] As an embodiment, a raised portion 13 is provided on the bottom surface of the sizing plate 10 , and each mesh 12 passes through the sizing plate 10 and the raised portion 13 .

[0058] By arranging a raised portion 13 on the bottom surface of the glue-applying plate 10, when the raised portion 13 on the glue-applying plate 10 abuts against or is arranged in a gap above the current battery cell for glue application, the glue-applying plate 10 will have a gap approximately equal to the thickness of the raised portion 13 with the adjacent glue-applied battery cell, thereby avoiding the glue-applying plate 10 from abutting against the adjacent glue-applied battery cell, and further avoiding the uncured glue on the adjacent glue-applied battery cell from adhering to the glue-applying plate 10, thereby ensuring the gluing quality of the glue-applying screen.

[0059] As an embodiment, the raised portion 13 includes a plurality of protrusions 130 arranged in an array, and each protrusion 130 is provided with a mesh 12 .

[0060] By configuring the raised portion 13 to include a plurality of protrusions 130 arranged in an array, with a mesh 12 provided on each protrusion 130, a gap is formed between the bottom surface of the glue-applying plate 10 and the glue-applied battery cell during glue application, while reducing the contact area between the raised portion 13 and the battery cell, thereby reducing the risk of the raised portion 13 crushing the battery cell; and the protrusions 130 can also play a reinforcing role, which can reduce the deformation of the scraper assembly when pressing the screen to a certain extent, and is conducive to ensuring the overall uniformity of glue application on the glue-applying screen.

[0061] See also Figure 4 As shown, as an embodiment, a plurality of bumps 130 are arranged along the second direction ( Figure 4 The first end bump area 113 includes at least one column of bumps 130, the middle bump area 114 includes multiple columns of bumps 130, and the second end bump area 115 includes at least one column of bumps 130. Each column of bumps 130 is arranged along the first direction ( Figure 4 two adjacent columns of bumps 130 in the middle bump area 114 are staggered, and the first direction is perpendicular to the second direction.

[0062] By staggering the bumps 130 in two adjacent rows in the middle bump area 114 , the number of glue points can be reduced while ensuring the reliability of the connection between the cell and the soldering ribbon, thereby reducing the amount of glue used.

[0063] As an embodiment, the second end bump region 115 includes two columns of bumps 130 , and the column spacing between the two columns of bumps 130 in the second end bump region 115 is smaller than the column spacing between the columns of bumps 130 in the middle bump region 114 .

[0064] Specifically, the second end bump area 115 includes two columns of bumps 130 , which can apply two columns of glue dots with a smaller column spacing on the current battery cell corresponding to the second end bump area 115 .

[0065] By setting the column spacing between the two columns of bumps 130 in the second end bump area 115 to be smaller than the column spacing between the columns of bumps 130 in the middle bump area 114, the connection strength between the soldering tape on the current cell corresponding to the second end bump area 115 and the cell is improved.

[0066] The specific glue application locations of the second-end bump region 115 are described in detail below. For ease of description, the cell currently being glued is labeled as cell A, and the cell adjacent to cell A and awaiting glue application is labeled as cell B. Cells A and B are connected via multiple parallel solder ribbons C, i.e., the first half of solder ribbon C is soldered to the upper surface of cell A, and the second half of solder ribbon C is soldered to the lower surface of cell B. Because cell A and cell B are prone to misalignment during the transfer process of the cell string, the first end of the first half of solder ribbon C should be reinforced when applying glue to the front of the cell string. The first end of the first half of solder ribbon C is adjacent to the end of cell B, so the second-end bump region 115 can be used to apply two tight glue points to the first end of the first half of solder ribbon C for reinforcement, ensuring that the first end of the first half of solder ribbon C is firmly connected to cell A after solidification.

[0067] See also Figure 1 and Figure 2 As shown, as an embodiment, the raised portion 13 includes a plurality of long ribs arranged in parallel and spaced apart and extending along the second direction, and a plurality of meshes 12 are arranged on each long rib at intervals along the second direction, and the second direction is perpendicular to the first direction.

[0068] By setting the raised portion 13 as a plurality of long convex ribs extending along the second direction, and a plurality of mesh holes 12 are arranged at intervals along the second direction on each long convex rib, a gap is formed between the bottom surface of the glue-applying plate and the glue-applied battery cell when gluing is achieved, and another raised portion with a simple structure and easy processing is provided; and the long convex ribs can also play a reinforcing role, which can reduce the deformation of the scraper assembly when pressing the screen to a certain extent, which is beneficial to ensure the overall uniformity of the glue application on the glue-applying screen.

[0069] See also Figure 2 and Figure 3 As shown, as an embodiment, the mesh 12 is any one of a long hole, a round hole, a square hole or a special-shaped hole.

[0070] By setting the mesh 12 as any of long holes, round holes, square holes or special-shaped holes, a variety of mesh 12 structures that are easy to process are provided.

[0071] As an embodiment, the meshes 12 are long strips, and the length difference between each mesh 12 in the middle area 111 and the length of the meshes 12 in the first side area 110 and the second side area 112 is in the range of 0.1 mm to 0.2 mm.

[0072] Specifically, the length of each mesh 12 in the middle area 111 is equal, the length of each mesh 12 in the first side area 110 and the second side area 112 is equal, and the difference between the length of each mesh 12 in the middle area 111 and the length of the mesh 12 in the first side area 110 and the second side area 112 can be: 0.1mm, 0.15mm or 0.2mm.

[0073] Specifically, the elongated hole is a rectangular hole or a waist-shaped hole.

[0074] By setting the mesh 12 as a long strip hole and, based on the difference in deformation between the middle area and the two side areas during gluing, setting the difference in length of the mesh 12 in the middle area 111 and the length of the mesh 12 in the first side area 110 and the second side area 111 to 0.1mm~0.2mm, the overall uniformity of gluing on the gluing screen is further ensured.

[0075] See also Figure 1 and Figure 3 As shown in FIG. 1 , as an embodiment, two gluing areas 11 are spaced apart along the second direction on the gluing plate 10, and the distance between the two gluing areas 11 is in the range of 10 mm to 20 mm, that is, Figure 3 The value range of D shown in is 10 mm to 20 mm, and the second direction is perpendicular to the first direction.

[0076] Specifically, the distance between the two gluing areas 11 may be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm.

[0077] By providing two glue application areas 11 spaced apart along the second direction on the glue application plate 10, and setting the distance between the two glue application areas 11 to 10 mm to 20 mm, the glue application plate 10 can apply glue to two battery cells simultaneously, thereby improving the glue application efficiency of the glue application plate 10. Of course, three or more glue application areas 11 can also be provided as needed to apply glue to three or more battery cells simultaneously.

[0078] Please refer to Figure 2 As shown, as an embodiment, the height of the protrusion 13 is 0.1 mm to 0.5 mm.

[0079] Specifically, the height of the protrusion 13 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0080] According to the glue application amount of each glue point in the specific glue application process, the height of the protrusion 13 is set to 0.1 mm to 0.5 mm to ensure that the uncured glue on the adjacent glued battery cells will not adhere to the glue application plate 10.

[0081] The sizing screen proposed in this embodiment has the following advantages compared with the prior art:

[0082] 1) The area of ​​each mesh in the middle area of ​​the sizing plate is smaller than the area of ​​each mesh in the first side area and the second side area. When the scraper assembly presses the screen, the mesh area in the middle area is basically the same as the mesh area in the first side area and the second side area. Therefore, the amount of glue output from the mesh in the middle area is basically the same as the amount of glue output from the mesh in the first side area and the second side area, thereby ensuring the overall uniformity of glue application on the sizing screen.

[0083] 2) The mesh is set on the raised part. When applying glue to the current battery cell, there is a certain gap between the glue-applying plate and the adjacent glue-applied battery cell to prevent the uncured glue on the adjacent glue-applied battery cell from adhering to the glue-applying plate, thereby ensuring the gluing quality of the glue-applying screen.

[0084] 3) The raised portion includes a plurality of protrusions arranged in an array, and each protrusion is provided with a mesh hole. When applying glue, a gap is formed between the bottom surface of the glue-applying plate and the glue-applied battery cell, while reducing the contact area between the raised portion and the battery cell, thereby reducing the risk of the raised portion crushing the battery cell; and the protrusion can also play a reinforcing role, which can reduce the deformation of the scraper assembly when pressing the screen to a certain extent, which is conducive to ensuring the overall uniformity of the glue application on the glue-applying screen.

[0085] 4) The two adjacent rows of bumps in the middle bump area are staggered, which can reduce the number of glue points and thus reduce the amount of glue used while taking into account the reliability of the connection between the battery cell and the solder ribbon.

[0086] 5) The second end bump area includes two rows of bumps, which can apply two rows of glue dots with a smaller row spacing on the current battery cell corresponding to the second end bump area, thereby improving the connection strength between the solder strip on the current battery cell corresponding to the second end bump area and the battery cell.

[0087] On the second aspect, the embodiment of the present application also proposes a glue applying mechanism, which includes a scraper assembly and the above-mentioned glue applying screen. The scraper assembly is arranged above the glue applying screen. The scraper assembly includes a drive assembly and a scraper. The drive end of the drive assembly is connected to the scraper. The drive assembly is configured to drive the scraper to rise and fall and move laterally; the drive assembly drives the scraper to descend and press against the glue applying plate and then move laterally to scrape the glue on the glue applying plate into the mesh, and the glue flows through the mesh to the surface of the solder strip and the battery cell to be glued.

[0088] The collaboration between the scraper assembly and the glue screen enables automatic glue application to the cell. The glue screen also ensures uniform glue application, ensuring the quality of the glue application mechanism. The scraper assembly is an existing device, so its specific structure will not be described in detail here.

[0089] On the third aspect, the embodiment of the present application further proposes a battery string gluing device, which includes a battery string conveying mechanism, a first gluing mechanism, a first curing mechanism, a flipping mechanism, a second gluing mechanism and a second curing mechanism, and the first gluing mechanism and the second gluing mechanism are both the above-mentioned gluing mechanisms, wherein: the first gluing station, the first curing station, the flipping station, the second gluing station and the second curing station are sequentially arranged on the conveying path of the battery string conveying mechanism, and the battery string conveying mechanism is configured to convey the battery string in a step-by-step manner along the second direction; the first gluing mechanism is arranged above the first gluing station, and the first gluing mechanism is configured to apply glue to the front of the battery cell passing through the first gluing station. glue; a first curing mechanism is arranged at the first curing station, and the first curing mechanism is configured to cure the glue spots on the front side of the battery cell that has passed the first curing station; a flipping mechanism is arranged at the flipping station, and the flipping mechanism is configured to flip the battery string that has been cured by the first curing mechanism on the flipping station, so that the back sides of all battery cells in the battery string face upward; a second gluing mechanism is arranged above the second gluing station, and the second gluing mechanism is configured to apply glue to the back side of the battery cell that has passed the second gluing station; a second curing mechanism is arranged at the second curing station, and the second curing station is configured to cure the glue spots on the back side of the battery cell that has passed the second curing station.

[0090] Through the cooperation of the battery string conveying mechanism, the first gluing mechanism, the first curing mechanism, the flipping mechanism, the second gluing mechanism and the second curing mechanism, automatic double-sided gluing and curing of the battery string are achieved; at the same time, the gluing uniformity of the first gluing mechanism and the second gluing mechanism is good, ensuring the gluing quality of the battery string.

[0091] In this application, the battery string conveying mechanism is the conveying line, and the first curing mechanism, the flipping mechanism and the second curing mechanism are all existing equipment, so the specific structure will not be described in detail here.

[0092] See also Figure 1 and Figure 5 As shown, Figure 1 : is a schematic diagram of the three-dimensional structure of the sizing screen of the first sizing mechanism provided in an embodiment of the present application, Figure 5 It is a structural diagram of the sizing screen of the second sizing mechanism provided in an embodiment of the present application. As an implementation mode, the mesh density of the sizing area 11 of the first sizing mechanism is greater than the mesh density of the sizing area 11 of the second sizing mechanism.

[0093] By setting the mesh density of the adhesive application area 11 of the first adhesive application mechanism to be greater than the mesh density of the adhesive application area 11 of the second adhesive application mechanism, the amount of adhesive applied on the back of the battery string is reduced while ensuring the connection reliability of the adhesive application portion on the back of the battery string. In other words, the connection strength requirement between the solder ribbon and the battery cell on the back of the battery string is generally lower than that on the front, so the amount of adhesive applied on the back can be correspondingly reduced compared to the front.

[0094] The above embodiments merely illustrate the basic principles and features of the present application. The present application is not limited by the above examples. Various changes and modifications may be made to the present application without departing from the spirit and scope of the present application. Such changes and modifications are intended to fall within the scope of the present application. The scope of protection claimed in the present application is defined by the appended claims and their equivalents.

Claims

1. A sizing screen, characterized in that: The sizing screen comprises a sizing plate, wherein: The glue plate is provided with at least one glue application area, each of the glue application areas can be divided into a first side area, a middle area, and a second side area along a first direction, and the first side area, the middle area, and the second side area are all provided with a plurality of mesh holes penetrating the glue plate; An area of ​​each mesh of the middle region is smaller than an area of ​​each mesh of the first side region and the second side region.

2. The sizing screen according to claim 1, characterized in that: A bulge is provided on the bottom surface of the sizing plate, and each of the mesh holes passes through the sizing plate and the bulge.

3. The sizing screen according to claim 2, characterized in that: The raised portion includes a plurality of convex blocks arranged in an array, and each of the convex blocks is provided with one of the mesh holes.

4. The sizing screen according to claim 3, characterized in that: The plurality of bumps can be divided into a first end bump region, a middle bump region, and a second end bump region along the second direction, wherein the first end bump region includes at least one column of the bumps, the middle bump region includes multiple columns of the bumps, and the second end bump region includes at least one column of the bumps, and the bumps in each column are arranged along the first direction; The bumps in two adjacent columns in the middle bump zone are staggered, and the first direction is perpendicular to the second direction.

5. The sizing screen according to claim 4, characterized in that: The second end bump region includes two columns of bumps, and a column spacing between the two columns of bumps in the second end bump region is smaller than a column spacing between the columns of bumps in the middle bump region.

6. The sizing screen according to claim 2, characterized in that: The raised portion includes a plurality of long convex ribs arranged in parallel and at intervals and extending along a second direction. A plurality of mesh holes are arranged on each of the long convex ribs at intervals along the second direction. The second direction is perpendicular to the first direction.

7. The sizing screen according to claim 1, characterized in that: The mesh holes are any of long holes, round holes, square holes or special-shaped holes.

8. The sizing screen according to claim 1, characterized in that: The mesh holes are long strip holes, and the difference between the length of each mesh hole in the middle area and the length of the mesh holes in the first side area and the second side area is in the range of 0.1 mm to 0.2 mm.

9. The sizing screen according to claim 1, characterized in that: The glue applying plate is provided with two glue applying areas spaced apart along a second direction, the distance between the two glue applying areas is in the range of 10 mm to 20 mm, and the second direction is perpendicular to the first direction.

10. The sizing screen according to claim 2, characterized in that: The height of the raised portion is 0.1 mm to 0.5 mm.

11. A glue applying mechanism, characterized in that: The sizing mechanism comprises a scraper assembly and a sizing screen according to any one of claims 1 to 10, wherein: The scraper assembly is arranged above the sizing screen, and the scraper assembly includes a drive assembly and a scraper, the drive end of the drive assembly is connected to the scraper, and the drive assembly is configured to drive the scraper to rise and fall and move laterally; The drive assembly drives the scraper to descend and press against the glue plate and then move horizontally to scrape the glue on the glue plate into the mesh. The glue flows through the mesh to the surface of the solder strip and battery cell to be glued.

12. A battery string gluing device, characterized in that: The battery string gluing device comprises a battery string conveying mechanism, a first gluing mechanism, a first curing mechanism, a flipping mechanism, a second gluing mechanism, and a second curing mechanism, wherein the first gluing mechanism and the second gluing mechanism are both the gluing mechanisms according to claim 11, wherein: A first gluing station, a first curing station, a flipping station, a second gluing station, and a second curing station are sequentially arranged on a conveying path of the battery string conveying mechanism, and the battery string conveying mechanism is configured to convey the battery string in a stepwise manner along the second direction; The first glue applying mechanism is disposed above the first glue applying station, and is configured to apply glue to the front surface of the battery cell passing through the first glue applying station; The first curing mechanism is disposed at the first curing station, and is configured to cure the glue points on the front surface of the battery cell passing through the first curing station; The flipping mechanism is disposed at the flipping station, and is configured to flip the battery string cured by the first curing mechanism at the flipping station so that the back surfaces of all battery cells in the battery string face upwards; The second glue applying mechanism is arranged above the second glue applying station, and the second glue applying mechanism is configured to apply glue to the back side of the battery cell passing through the second glue applying station; The second curing mechanism is disposed at the second curing station, and the second curing station is configured to cure the glue spots on the back side of the battery cell passing through the second curing station.

13. The battery string gluing device according to claim 12, characterized in that: The mesh density of the gluing area of ​​the first gluing mechanism is greater than the mesh density of the gluing area of ​​the second gluing mechanism.

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