Conveying device and glue printing equipment

Abstract

The utility model discloses a conveying device and glue printing equipment. Wherein the conveying device is used for conveying a welded battery string to a gluing station below the screen printing mechanism, and the battery string comprises a battery piece and a welding strip which is at least welded with the upper surface of the battery piece; the conveying device comprises a conveying belt and a conveying bottom plate, wherein the conveying bottom plate is arranged below the conveying surface of the conveying belt; the conveying belt is configured to bear and convey welded battery strings, and the conveying bottom plate is configured to support a conveying surface of the conveying belt; a groove is formed in the top face of the conveying bottom plate, the groove is located below the gluing station, and the groove is configured to provide a downward floating space for the currently-glued battery piece and a conveying belt below the battery piece when a screen printing plate of the screen printing mechanism extrudes the currently-glued battery piece; according to the application, when the screen printing plate of the screen printing mechanism is pressed down to apply glue, a downward floating space can be provided for the current glue-printed battery piece and the conveying belt below the current glue-printed battery piece, the local pressure of a welding strip on the battery piece is reduced, and then the subfissure of the battery piece is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell manufacturing, and in particular to a conveying device and a printing glue device. Background Art

[0002] A current low-temperature soldering technique involves applying glue dots to the solder ribbons on the surface of the cell string after soldering. The glue dots solidify, further bonding the ribbons to the cell cells and improving the connection strength between the ribbons and the cell cells. When applying glue to the surface of the cell string after soldering using screen printing, the cell string with the solder ribbons welded to its surface is conveyed by a conveyor to the underside of the screen printing mechanism. The screen printing mechanism's scraper descends and presses against the screen. As the scraper moves along the screen, it causes the glue on the screen to penetrate through the mesh and be printed onto the cell string's solder ribbons.

[0003] Because the screen is close to the battery string, the scraper can easily cause the screen to dent and deform during scraping, squeezing the solder ribbon on the battery string. This in turn squeezes the cells underneath the ribbon, causing localized pressure on the cells. The battery string is rigidly supported by the conveyor belt and the conveyor floor beneath it. When the solder ribbon is compressed, the localized pressure on the cells can easily cause hidden cracks in the cells within the battery string. Utility Model Content

[0004] In order to solve the problems of the prior art, the present application provides a conveying device and a glue printing device, which can solve the problem that when a battery string with solder strips welded on the surface is transported by a conveying device to the bottom of the screen of a silk screen printing mechanism for glue printing, it is squeezed by the concave and deformed screen, causing hidden cracks in the battery cells in the battery string.

[0005] Specifically, in a first aspect, the present application provides a conveying device for conveying a welded battery string to a glue application station below a screen printing mechanism, wherein the battery string includes battery cells and a welding ribbon welded to at least the upper surface of the battery cells; the conveying device includes a conveyor belt and a conveyor bottom plate, wherein:

[0006] The conveying bottom plate is arranged below the conveying surface of the conveyor belt;

[0007] The conveyor belt is configured to carry and convey the welded battery strings, and the conveyor bottom plate is configured to support the conveying surface of the conveyor belt;

[0008] A groove is provided on the top surface of the conveying bottom plate, which is located below the glue application station. The groove is configured to provide downward floating space for the currently printed battery cell and the conveyor belt below the battery cell when the screen of the silk-screen printing mechanism squeezes the currently printed battery cell.

[0009] The conveying device provided in the present application has a groove on the top surface of the conveying bottom plate supporting the conveyor belt in the conveying device. The groove is located at the silk screen printing station. When the screen of the silk screen printing mechanism is pressed down to apply glue, it can provide downward floating space for the currently printed glue battery cell and the conveyor belt underneath it that are squeezed by the deformation of the screen, thereby reducing the local pressure caused by the welding belt on the battery cell, thereby avoiding hidden cracks in the battery cell due to excessive local pressure.

[0010] In some embodiments, the conveying bottom plate includes at least two connected bottom plates, the bottom plate located below the glue application station is further provided with adsorption holes, the adsorption holes are located outside the groove, and the conveying belt is provided with through holes corresponding to the adsorption holes;

[0011] The adsorption holes are configured to adsorb and fix the welded battery strings on the conveyor belt through the through holes, and fix the welded battery strings on the gluing station.

[0012] By opening adsorption holes on the outside of the groove on the conveyor bottom plate and through holes corresponding to the adsorption holes on the conveyor belt, the welded battery string can be fixed on the conveyor belt to prevent the battery string from sliding on the conveyor belt and causing position deviation, while ensuring that the battery cell with the current glue printing floats into the groove when squeezed by the screen.

[0013] In some embodiments, the conveying bottom plate includes a first bottom plate and a second bottom plate connected to each other, the first bottom plate and the second bottom plate are arranged along a first direction, and the first direction is parallel to the running direction of the conveyor belt;

[0014] The first bottom plate is located below the gluing station, and the groove is provided on the first bottom plate;

[0015] The second bottom plate is provided with adsorption holes, and the conveyor belt is provided with through holes corresponding to the adsorption holes;

[0016] The adsorption holes are configured to adsorb and fix the welded battery strings on the conveyor belt through the through holes, and fix the welded battery strings on the gluing station.

[0017] Adsorption holes are opened on the second bottom plate adjacent to the glue application station, and through holes corresponding to the adsorption holes are opened on the conveyor belt, which can fix the battery string and at the same time ensure that the battery cell currently printed with glue floats into the groove when squeezed by the screen.

[0018] In some embodiments, the depth of the groove is greater than 0.1 mm.

[0019] The depth of the groove is greater than 0.1 mm, which can provide sufficient downward floating space for the battery cell currently printed with glue and the conveyor belt below the battery cell, thereby preventing the battery cell currently printed with glue from being squeezed by the screen and cracked.

[0020] In some embodiments, the battery cell currently printed with glue is at least one battery cell, the size of the groove is larger than the outer size of the battery cell currently printed with glue, and the battery cell currently printed with glue can be accommodated in the groove.

[0021] The size of the groove is larger than the outer size of the battery cell with the current printing glue. The battery cell with the current printing glue can be accommodated in the groove, so that the entire battery cell with the current printing glue can float downward completely, further reducing the risk of hidden cracks in the battery cell.

[0022] In some embodiments, the groove is a rectangular groove, and the distance between at least one side edge of the battery sheet currently printed with glue and the edge of the adjacent groove is ≥5 mm.

[0023] The distance between at least one side edge of the currently printed battery cell and the edge of the adjacent groove is ≥5mm, which can provide sufficient space for the conveyor belt under the currently printed battery cell to float downward with the battery cell, ensuring the currently printed battery cell to float downward.

[0024] In some embodiments, the distances between the four side edges of the current printed solar cell and the edges of the adjacent grooves are all ≥5 mm.

[0025] The distances between the four side edges of the currently printed battery cell and the edges of the adjacent grooves are all ≥5mm, which can provide sufficient space for the conveyor belt below the currently printed battery cell to float downward with the battery cell, and provide sufficient deviation margin for the currently printed battery cell and the conveyor belt below to float downward.

[0026] In some embodiments, the conveying device further comprises two rollers, the two rollers being arranged at both ends of the conveying base plate, the conveyor belt being wound around the two rollers, and at least one roller being connected to a drive assembly;

[0027] The roller is configured to be driven to rotate by the driving assembly to drive the conveyor belt to operate.

[0028] The two rollers are driven to rotate by a driving assembly to drive a conveyor belt wound around the two rollers to transport the battery strings. The structure is simple, the cost is low, and the operation is stable.

[0029] In some embodiments, the conveying device further comprises a bracket, and the conveying base plate is fixedly connected to the bracket;

[0030] The bracket is configured to fixedly support the conveying bottom plate.

[0031] The conveying bottom plate is fixed on the bracket and its relative position with the screen in the screen printing mechanism fixed above is kept fixed. When the screen in the screen printing mechanism squeezes the battery cell currently printed with glue, it can accurately and stably provide downward floating space for the battery cell currently printed with glue and the conveyor belt below the battery cell.

[0032] In a second aspect, the present application provides a rubber printing device, comprising a screen printing mechanism and a conveying device as provided in any one of the first aspects, wherein the screen printing mechanism is disposed above the conveying device;

[0033] The conveying device is configured to convey the welded battery strings to a gluing station below the screen printing mechanism;

[0034] The screen printing mechanism includes a scraper and a screen with mesh holes. The scraper is used to press the screen downward and move along the surface of the screen to scrape the glue on the side of the screen away from the battery string through the mesh holes onto the battery cell in the battery string where the glue is currently printed, printing glue dots on the solder strips of the battery cells.

[0035] The groove is configured to provide downward floating space for the battery cell currently printed with glue and the conveyor belt below the battery cell when the screen squeezes the battery cell currently printed with glue.

[0036] The glue printing equipment provided in the present application has a groove formed on the conveying bottom plate supporting the conveyor belt in the conveying device below the screen printing mechanism. When the scraper in the screen printing mechanism presses the screen downward and moves along the surface of the screen to print glue, the groove provides downward floating space for the battery cells squeezed by the screen and the conveyor belt below the battery cells, thereby preventing the battery cells currently being printed from cracking due to excessive local pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the figures represent similar components, where:

[0038] Figure 1 This is a top view of a conveying device according to one embodiment of the present application;

[0039] Figure 2 yes Figure 1 Middle AA section view;

[0040] Figure 3 is a schematic diagram of a bottom plate in a conveying device according to one embodiment of the present application;

[0041] Figure 4 This is a schematic diagram of a bottom plate cooperating with a downwardly floating battery cell in a conveying device according to one embodiment of the present application;

[0042] Figure 5 yes Figure 4 Middle BB cross-section;

[0043] Figure 6 This is a schematic diagram of a conveying device in one embodiment of the present application, in which a bottom plate cooperates with two downwardly floating battery cells;

[0044] Figure 7 This is a three-dimensional diagram of a rubber printing device according to one embodiment of the present application;

[0045] Figure 8 This is a schematic diagram of the cooperation between the conveying device and the screen printing mechanism in the glue printing equipment of one embodiment of the present application;

[0046] Among them: 100, conveying device; 110, conveyor belt; 120, conveying bottom plate; 121, bottom plate; 122, adsorption holes; 130, groove; 200, silk screen mechanism; 210, screen; 220, scraper; 300, battery string; 310, battery cell. DETAILED DESCRIPTION

[0047] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application.

[0048] As described in the background technology, when low-temperature welding is currently performed on battery strings, the battery strings with solder strips welded on the surface need to be transported by a conveying device to the bottom of the screen of the silk screen printing mechanism. The scraper of the silk screen printing mechanism descends to press the screen and moves along the screen, so that the glue on the screen passes through the mesh holes on the screen and is printed on the solder strips of the battery string.

[0049] When the scraper is scraping the screen, the screen is prone to concave deformation and thus squeeze the solder ribbon on the battery string, thereby squeezing the battery cells under the solder ribbon and causing local pressure on the battery cells, resulting in hidden cracks in the battery cells in the battery string.

[0050] In order to solve the above problems, the present application creatively proposes a conveying device and a glue printing device. By opening a groove on the conveying bottom plate supporting the conveyor belt in the conveying device, the groove is located at the silk screen printing station. When the screen of the silk screen printing mechanism is pressed down to apply glue, it can provide a downward floating space for the current glue-printed battery cell and the conveyor belt underneath it that are squeezed by the deformation of the screen, thereby reducing the local pressure caused by the welding belt on the battery cell and avoiding hidden cracks in the battery cell due to excessive local pressure.

[0051] The present application will be described in detail below through specific embodiments.

[0052] The embodiment of the present application provides a conveying device 100, referring to Figure 1 and Figure 2As shown, the conveying device 100 is used to convey the welded battery string 300 to the glue application station below the screen printing mechanism 200. The battery string 300 includes a battery cell 310 and a welding ribbon (not shown) welded to at least the upper surface of the battery cell 310. The battery string 300 can be a battery string with welding ribbons welded on both sides, or a battery string with welding ribbons welded on one side, such as an IBC (back contact) battery string.

[0053] The conveying device 100 includes a conveyor belt 110 and a conveyor base 120, wherein:

[0054] The conveying bottom plate 120 is disposed below the conveying surface of the conveyor belt 110;

[0055] The conveyor belt 110 is configured to carry and convey the welded battery strings 300 , and the conveying base plate 120 is configured to support the conveying surface of the conveyor belt 110 ;

[0056] A groove 130 is provided on the top surface of the conveying base plate 120 and is located below the glue application station. The groove 130 is configured to provide downward floating space for the currently printed battery cell 310 and the conveyor belt 110 below the battery cell 310 when the screen 210 of the silk-screen printing mechanism 200 squeezes the currently printed battery cell 310.

[0057] The conveying device 100 provided in the present application has a groove 130 formed on the top surface of the conveying base plate 120 supporting the conveyor belt 110 in the conveying device 100. The groove 130 is located at the screen printing station and can provide downward floating space for the currently printed glue battery cell 310 and the conveyor belt 110 below it that are deformed and squeezed by the screen 210 when the screen 210 of the screen printing mechanism 200 is pressed down to apply glue, thereby reducing the local pressure caused by the welding ribbon on the battery cell 310, thereby avoiding hidden cracks in the battery cell 310 due to excessive local pressure.

[0058] In some embodiments, the conveying base plate 120 includes at least two base plates 121 connected to each other. Figures 3 to 5 As shown, the bottom plate 121 located below the glue application station is further provided with adsorption holes 122, which are located outside the groove 130, and the conveyor belt 110 is provided with through holes (not shown) corresponding to the adsorption holes 122;

[0059] The adsorption holes 122 are configured to adsorb and fix the welded battery strings 300 on the conveyor belt 110 through the through holes, and fix the welded battery strings 300 on the gluing station.

[0060] By providing adsorption holes 122 on the outside of the groove 130 on the conveying bottom plate 120 and through holes corresponding to the adsorption holes 122 on the conveying belt 110, the welded battery string 300 can be fixed on the conveying belt 110 to prevent the battery string 300 from sliding on the conveying belt 110 and causing position deviation, while ensuring that the battery cell 310 currently printed with glue floats into the groove 130 when squeezed by the screen 210.

[0061] In some embodiments, the conveying bottom plate 120 includes a first bottom plate and a second bottom plate connected to each other, and the first bottom plate and the second bottom plate are arranged along a first direction, and the first direction is parallel to the running direction of the conveyor belt 110;

[0062] The first bottom plate is located below the glue application station, and the groove 130 is provided on the first bottom plate;

[0063] The second bottom plate is provided with adsorption holes 122, and the conveyor belt 110 is provided with through holes corresponding to the adsorption holes 122;

[0064] The adsorption holes 122 are configured to adsorb and fix the welded battery strings 300 on the conveyor belt 110 through the through holes, and fix the welded battery strings 300 on the gluing station.

[0065] Adsorption holes 122 are provided on the second bottom plate adjacent to the glue application station, and through holes corresponding to the adsorption holes 122 are provided on the conveyor belt 110, so as to fix the battery string 300 and at the same time ensure that the battery cell 310 currently printed with glue floats into the groove 130 when squeezed by the screen 210.

[0066] In some embodiments, reference Figure 2 and Figure 5 As shown, the depth of the groove 130 is greater than 0.1 mm. For example, the depth of the groove 130 can be 0.3 mm, 0.7 mm, 1 mm, 2 mm, 5 mm, 7 mm, 10 mm, or any other value that is less than the thickness of the conveying base plate 120 and can provide space for the current printed battery cell 310 and the conveyor belt 110 below the battery cell 310 to float downward.

[0067] The depth of the groove 130 is greater than 0.1 mm, which can provide sufficient downward floating space for the battery cell 310 currently printed with glue and the conveyor belt 110 below the battery cell 310, thereby preventing the battery cell 310 currently printed with glue from being squeezed by the screen 210 and cracked.

[0068] In some embodiments, the battery cell 310 currently printed with adhesive is at least one battery cell, and the size of the groove 130 is larger than the outer size of the battery cell 310 currently printed with adhesive, so that the battery cell 310 currently printed with adhesive can be accommodated in the groove 130 .

[0069] Reference Figure 4 As shown, the battery cell to be printed with glue is a battery cell 310, and the size of the groove 130 is larger than the outer size of the battery cell 310. Figure 6 As shown, the battery cells currently printed with glue are two battery cells 310, and the size of the groove 130 is larger than the outer size of the two battery cells 310. Of course, the battery cells currently printed with glue can also be three or more battery cells.

[0070] The size of the groove 130 is larger than the outer size of the battery cell 310 with the current printing glue. The battery cell 310 with the current printing glue can be accommodated in the groove 130, so that the entire battery cell with the current printing glue can float downward completely, further reducing the risk of hidden cracks in the battery cell.

[0071] Optionally, the groove 130 is a rectangular groove, and the distance between at least one side edge of the current printed battery cell 310 and the edge of the adjacent groove 130 is ≥5mm. Figure 4 or Figure 6 At least one of L1, L2, L3, and L4 is greater than or equal to 5 mm. For example, the distance between at least one side edge of the printed battery cell 310 and the edge of the adjacent groove 130 is 5 mm, 7 mm, 1 cm, or any other value greater than or equal to 5 mm.

[0072] The distance between at least one side edge of the currently printed battery cell 310 and the edge of the adjacent groove 130 is ≥5 mm, which can provide sufficient space for the conveyor belt below the currently printed battery cell 310 to float downward with the battery cell 310, thereby ensuring the currently printed battery cell 310 to float downward.

[0073] Optional, see Figure 4 and Figure 6 As shown, the distances L1 , L2 , L3 , and L4 between the four side edges of the currently printed battery cell 310 and the edge of the adjacent groove 130 are all ≥5 mm.

[0074] The distances between the four side edges of the currently printed battery cell 310 and the edges of the adjacent grooves 130 are all ≥5 mm, which can provide sufficient space for the conveyor belt below the currently printed battery cell 310 to float downward with the battery cell 310, and provide sufficient deviation margin for the currently printed battery cell 310 and the conveyor belt 110 below to float downward.

[0075] In some embodiments, the conveying device 100 further includes two rollers (not shown), which are disposed at both ends of the conveying base plate 120 , and the conveyor belt 110 is wound around the two rollers, and at least one of the rollers is connected to a drive assembly (not shown);

[0076] The roller is configured to be driven to rotate by the driving assembly to drive the conveyor belt 110 to operate.

[0077] The two rollers are driven to rotate by a driving assembly to drive the conveyor belt 110 wound around the two rollers to run and convey the battery string 300. The structure is simple, the cost is low, and the operation is stable.

[0078] In some embodiments, the conveying device 100 further includes a bracket (not shown), and the conveying base plate 120 is fixedly connected to the bracket;

[0079] The bracket is configured to fixedly support the conveying base plate 120 .

[0080] The conveying base plate 120 is fixed on the bracket and maintains a fixed relative position with the screen 210 in the screen printing mechanism 200 fixed above. When the screen 210 in the screen printing mechanism 200 squeezes the battery cell 310 currently printed with glue, it can accurately and stably provide downward floating space for the battery cell 310 currently printed with glue and the conveyor belt 110 below the battery cell 310.

[0081] The present application also provides a printing glue device, referring to Figure 7 and Figure 8 As shown, the printing device includes a screen printing mechanism 200 and a conveying device 100 as provided in the above embodiment, and the screen printing mechanism 200 is arranged above the conveying device 100;

[0082] The conveying device 100 is configured to convey the welded battery string 300 to the gluing station below the screen printing mechanism 200;

[0083] The screen printing mechanism 200 includes a scraper 220 and a screen 210 with mesh holes. The scraper 220 is used to press the screen 210 downward and move along the surface of the screen 210 to scrape the glue on the side of the screen 210 facing away from the battery string 300 through the mesh holes onto the battery cell 310 in the battery string 300 where the glue is currently printed, thereby printing glue dots on the solder strips of the battery cell 310.

[0084] The groove is configured to provide downward floating space for the battery cell currently printed with glue and the conveyor belt below the battery cell when the screen squeezes the battery cell currently printed with glue.

[0085] The glue printing equipment provided in the present application has a groove formed on the conveying bottom plate supporting the conveyor belt in the conveying device below the screen printing mechanism. When the scraper in the screen printing mechanism presses the screen downward and moves along the surface of the screen to print glue, the groove provides downward floating space for the battery cells squeezed by the screen and the conveyor belt below the battery cells, thereby preventing the battery cells currently being printed from cracking due to excessive local pressure.

[0086] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0088] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A conveying device, characterized in that: The conveying device is used to convey the welded battery string to the gluing station below the screen printing mechanism, wherein the battery string includes battery cells and welding ribbons welded to at least the upper surface of the battery cells; the conveying device includes a conveyor belt and a conveyor bottom plate, wherein: The conveying bottom plate is arranged below the conveying surface of the conveyor belt; The conveyor belt is configured to carry and convey the welded battery strings, and the conveying bottom plate is configured to support the conveying surface of the conveyor belt; A groove is provided on the top surface of the conveying bottom plate, and the groove is located below the glue application station. The groove is configured to provide downward floating space for the battery cell currently printed with glue and the conveyor belt below the battery cell when the screen of the silk-screen printing mechanism squeezes the battery cell currently printed with glue.

2. The conveying device according to claim 1, characterized in that The conveying bottom plate includes at least two connected bottom plates, the bottom plate located below the gluing station is further provided with adsorption holes, the adsorption holes are located outside the groove, and the conveying belt is provided with through holes corresponding to the adsorption holes; The adsorption holes are configured to: adsorb and fix the welded battery strings on the conveyor belt through the through holes, and fix the welded battery strings on the gluing station.

3. The conveying device according to claim 1, characterized in that The conveying bottom plate includes a first bottom plate and a second bottom plate connected to each other, wherein the first bottom plate and the second bottom plate are arranged along a first direction, and the first direction is parallel to the running direction of the conveyor belt; The first bottom plate is located below the gluing station, and the groove is provided on the first bottom plate; The second bottom plate is provided with adsorption holes, and the conveyor belt is provided with through holes corresponding to the adsorption holes; The adsorption holes are configured to: adsorb and fix the welded battery strings on the conveyor belt through the through holes, and fix the welded battery strings on the gluing station.

4. The conveying device according to claim 1, characterized in that The depth of the groove is greater than 0.1 mm.

5. The conveying device according to claim 1, characterized in that The battery cell currently printed with glue is at least one battery cell, the size of the groove is larger than the outer size of the battery cell currently printed with glue, and the battery cell currently printed with glue can be accommodated in the groove.

6. The conveying device according to claim 5, characterized in that The groove is a rectangular groove, and the distance between at least one side edge of the battery cell currently printed with glue and the edge of the adjacent groove is ≥5mm.

7. The conveying device according to claim 6, characterized in that The distances between the four side edges of the current printed battery cell and the edges of the adjacent grooves are all ≥5 mm.

8. The conveying device according to claim 1, characterized in that The conveying device further comprises two rollers, the two rollers being arranged at both ends of the conveying base plate, the conveyor belt being wound around the two rollers, and at least one of the rollers being connected to a driving assembly; The roller is configured to be driven to rotate by the driving assembly to drive the conveyor belt to operate.

9. The conveying device according to claim 1, characterized in that The conveying device further comprises a bracket, and the conveying bottom plate is fixedly connected to the bracket; The bracket is configured to fixedly support the conveying base plate.

10. A rubber printing device, characterized in that: The glue printing device includes a screen printing mechanism and a conveying device according to any one of claims 1 to 9, wherein the screen printing mechanism is arranged above the conveying device; The conveying device is configured to convey the welded battery strings to the gluing station below the screen printing mechanism; The screen printing mechanism includes a scraper and a screen with mesh holes. The scraper is used to press the screen downward and move along the surface of the screen to scrape the glue on the side of the screen away from the battery string through the mesh holes onto the battery cell in the battery string where the glue is currently printed, thereby printing glue dots on the solder strips of the battery cells. The groove is configured to provide downward floating space for the battery cell currently printed with glue and the conveyor belt below the battery cell when the screen squeezes the battery cell currently printed with glue.

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