Screen printing device and glue printing equipment

Abstract

The utility model provides a screen printing device and glue printing equipment. The screen printing device comprises a rack, a screen printing plate driving mechanism, a screen printing plate mounting frame and a screen printing plate. The screen driving mechanism is arranged on the rack; the screen printing plate mounting frame is connected with a movable part of the screen printing plate driving mechanism, an inserting groove with an open bottom is formed in the screen printing plate mounting frame, the screen printing plate is inserted into the screen printing plate mounting frame through the inserting groove, and an equal-height block is arranged at the position, exposed out of the inserting groove, of the lower surface of the screen printing plate; the height difference between the upper groove face of the inserting groove and the lower groove face of the inserting groove is larger than the thickness of the screen printing plate located in the inserting groove. The screen printing plate driving mechanism is at least used for driving the screen printing plate mounting frame to ascend and descend between a high position and a low position, and when the screen printing plate mounting frame ascends to the high position, the screen printing plate is supported on the lower groove face of the inserting groove; and when the screen mounting frame descends to a low position, the screen is supported on the bearing surface where the workpiece to be printed is located through the equal-height blocks and is separated from the lower groove surface of the inserting groove. According to the screen printing device, automatic leveling of the screen printing plate and the bearing face is achieved, and therefore the screen printing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell assembly production, and specifically to a screen printing device and a glue printing device. Background Art

[0002] In a conventional screen printing device, the screen is fixedly inserted in a screen installation frame, and the screen installation frame is installed on the driving end of the screen driving mechanism through mechanical locking parts such as screws.

[0003] Before printing glue dots on the battery cells, in order to ensure the quality of glue dot printing, the screen mounting frame needs to be leveled before printing to ensure that the screen in the screen mounting frame is parallel to the supporting surface where the battery cells are located. Due to the high requirements for the parallelism between the screen and the supporting surface, the screen mounting frame leveling operation process is complicated and time-consuming, which affects the efficiency of glue printing. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a screen printing device, which adopts the following technical solutions:

[0005] A screen printing device comprises a frame, a screen driving mechanism, a screen mounting frame and a screen, wherein:

[0006] The screen driving mechanism is arranged on the frame;

[0007] The screen installation frame is connected to the movable part of the screen driving mechanism, and a plug-in slot with an open bottom is provided in the screen installation frame. The screen is plugged into the screen installation frame through the plug-in slot, and a height block is provided at a portion of the lower surface of the screen exposed to the plug-in slot, wherein the height difference between the upper slot surface of the plug-in slot and the lower slot surface of the plug-in slot is greater than the thickness of the screen located in the plug-in slot;

[0008] The screen driving mechanism is at least used to drive the screen mounting frame to rise and fall between a high position and a low position. When the screen mounting frame rises to a high position, the screen is supported on the lower groove surface of the plug-in slot; when the screen mounting frame descends to a low position, the screen is supported on the supporting surface where the workpiece to be printed is located through equal height blocks and is separated from the lower groove surface of the plug-in slot.

[0009] Since the lower surface of the screen is exposed to the plug-in slot and is provided with a height block, and the height difference between the upper slot surface of the plug-in slot and the lower slot surface of the plug-in slot is greater than the thickness of the screen in the plug-in slot, when the screen installation frame is driven by the screen drive mechanism to descend, the height block first contacts the supporting surface where the workpiece to be printed is located. As the screen installation frame continues to descend, the screen cannot continue to descend due to the obstruction of the supporting surface, so it moves relative to the screen installation frame and detaches from the lower slot surface of the plug-in slot. Finally, the screen is supported on the supporting surface where the workpiece to be printed is located by the height block. In other words, when the screen installation frame descends to a low position, the screen is automatically leveled with the supporting surface, and no additional leveling operation is required, thereby improving the efficiency of screen printing.

[0010] In some embodiments, when the screen is supported on the lower groove surface of the insertion groove, the lower surface of the contour block is lower than the lower surface of the screen installation frame.

[0011] Ensure that when the screen installation frame is driven by the screen drive mechanism to descend, the contour blocks first contact the supporting surface of the workpiece to be printed. After the screen installation frame descends into place, the screen is finally supported on the supporting surface of the workpiece to be printed by the contour blocks.

[0012] In some embodiments, the screen printing device also includes a scraper driving mechanism and a scraper. The scraper driving mechanism is arranged on a frame, and the scraper is connected to a movable part of the scraper driving mechanism and is located above the screen. The scraper driving mechanism is used to drive the scraper to descend so that the scraper rests on the screen supported on the supporting surface. The scraper driving mechanism is also used to drive the scraper to translate close to the screen, so that the printing material on the screen passes downward through the screen and is printed on the workpiece to be printed.

[0013] By setting a scraper drive mechanism and a scraper, after the screen is lowered into place, the scraper is driven by the scraper drive mechanism to abut against the screen and translate closely to the screen, thereby printing the material on the screen onto the workpiece to be printed.

[0014] In some embodiments, the screen mounting frame includes a top limit frame and a plug-in board arranged in pairs at both ends of the top limit frame, wherein: a horizontal support portion is formed at the lower end of the plug-in board, and a plug-in slot is formed between the horizontal support portion and the top limit frame, wherein the upper surface of the horizontal support portion constitutes the lower slot surface of the plug-in slot, and the lower surface of the top limit frame located directly above the horizontal support portion constitutes the upper slot surface of the plug-in slot; or, horizontal limit portions are respectively formed at the upper and lower ends of the plug-in board, and a plug-in slot is formed between the two horizontal limit portions, wherein the upper surface of the horizontal limit portion located at the lower end constitutes the lower slot surface of the plug-in slot, and the lower surface of the horizontal limit portion located at the upper end constitutes the upper slot surface of the plug-in slot; plug-in ears are respectively formed on opposite sides of the screen, and the two plug-in ears are respectively plugged into the two plug-in slots, and the height difference between the upper slot surface and the lower slot surface of the plug-in slot is greater than the thickness of the plug-in ear portions.

[0015] Since the two ends of the screen installation frame form plugging grooves, only the plugging ears on both sides of the screen are plugged into the plugging grooves, so the middle area of ​​the lower surface of the screen is exposed to the plugging groove.

[0016] In some embodiments, at least three equal-height blocks are disposed on the lower surface of the screen, and the lower surfaces of the at least three equal-height blocks are located at the same height.

[0017] At least three equal-height blocks support the screen from different positions, so that the screen can be stably supported on the supporting surface where the workpiece to be printed is located.

[0018] In some embodiments, three equal-height blocks are disposed on the lower surface of the screen, and the three equal-height blocks are arranged in an isosceles triangle; or, four equal-height blocks are disposed on the lower surface of the screen, and the four equal-height blocks are located at the four corners of the lower surface of the screen.

[0019] Three equal-height blocks arranged in an isosceles triangle support the screen from three positions, or four equal-height blocks support the screen from four corners of the screen, further ensuring the stability of the screen.

[0020] In some embodiments, the height difference between the lower surface of the contour block and the lower surface of the screen is 1.9 mm to 2.4 mm.

[0021] In order to ensure the printing quality of the workpiece to be printed, after the screen is supported on the supporting surface of the workpiece to be printed by the contour block, a predetermined printing distance needs to be formed between the lower surface of the screen and the workpiece to be printed. For this purpose, the height difference between the lower surface of the contour block and the lower surface of the screen needs to be adaptively set. In the case of printing the glue on the surface of the battery cell, the height difference between the lower surface of the contour block and the lower surface of the screen is set to 1.9mm~2.4mm, which can avoid the distance between the lower surface of the screen and the battery cell being too small, causing the printed glue dots to be flattened, and avoid the distance between the lower surface of the screen and the battery cell being too large, causing the glue to be unable to be printed on the battery cell.

[0022] In some embodiments, a pressing assembly is provided on the screen mounting frame, and the pressing assembly is used to press the screen downward.

[0023] When the screen installation frame is in a high position, the clamping assembly presses the screen against the lower slot surface of the plug-in slot. When the screen installation frame is lowered to a low position, the screen is supported on the supporting surface of the workpiece to be printed by the equal height block, and the clamping assembly presses the screen against the supporting surface. The clamping assembly presses the screen downward, thereby achieving the clamping and positioning of the screen, preventing the screen from shifting during the descent process or during the printing process, which affects the printing quality.

[0024] In some embodiments, a clamping hole located above the plug-in slot is provided on the screen mounting frame, and the clamping hole is connected to the plug-in slot; the clamping assembly includes a clamping cylinder, which is installed on the screen mounting frame and located above the clamping hole, and the telescopic rod of the clamping cylinder can extend downward into the plug-in slot through the clamping hole to clamp the screen downward.

[0025] A clamping assembly with a simple structure is provided, which can realize rapid clamping and releasing of a screen.

[0026] The present application also provides a glue printing device for printing glue on a battery string, the glue printing device includes a conveying device and the silk-screen printing device described in any one of the above items; the conveying device includes a mounting bracket, a supporting plate, a conveyor belt driving mechanism and a conveyor belt, wherein the conveyor belt driving mechanism is arranged on the mounting bracket, and the conveyor belt is sleeved on the conveyor belt driving mechanism; the supporting plate is installed on the mounting bracket, and is used to support the conveying surface of the conveyor belt; the conveyor belt driving mechanism is used to drive the conveyor belt to convey the battery string, so as to convey the battery cells in the battery string to the silk-screen printing station in sequence; the silk-screen printing device is arranged above the silk-screen printing station, and the silk-screen printing device is used to print glue on the battery cells conveyed to the silk-screen printing station, wherein, when the screen mounting frame is lowered to a low position, the screen is supported on the supporting surface of the supporting plate by equal height blocks.

[0027] Through the cooperation of the conveying device and the screen printing device, the printing device provided in the embodiment of the present application realizes the sequential printing of the battery cells in the battery string. Before printing the glue, the screen printing device does not need to perform a leveling operation, which improves the efficiency of printing the glue on the battery string.

[0028] The present application also provides another glue printing device, which is used to print glue on battery cells. The glue printing device includes a carrier platform and any of the above-mentioned screen printing devices; the carrier platform is arranged below the screen printing device, and is used to carry the battery cells to be printed with glue; the screen printing device is used to print glue on the battery cells carried on the carrier platform, wherein when the screen mounting frame is lowered to a low position, the screen is supported on the supporting surface of the carrier platform via equal height blocks.

[0029] Through the cooperation of the support platform and the screen printing device, the glue printing device provided by the present application realizes automatic glue printing on the battery cell. Before printing the glue, the screen printing device does not need to perform a leveling operation, thereby improving the efficiency of glue printing on the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the screen printing device in the embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the screen installation frame and the screen in the embodiment of the present application;

[0032] Figure 3 It is a bottom view structural diagram of the screen installation frame and the screen in the embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of the printing process of the screen printing device in the embodiment of the present application treating a printing workpiece at a first viewing angle;

[0034] Figure 5 It is a schematic diagram of the printing process of the screen printing device in the embodiment of the present application treating the printing workpiece at a second viewing angle (the frame and the screen driving mechanism are omitted);

[0035] Figure 6 for Figure 5 A partial enlarged view of the A area;

[0036] Figure 7 It is a schematic diagram of the printing process of the screen printing device in the embodiment of the present application treating a printed workpiece from a third viewing angle (the frame and the screen driving mechanism are omitted).

[0037] Figures 1 to 7 Included:

[0038] Rack 1;

[0039] Screen driving mechanism 2: first lifting driving unit 21, X-axis driving unit 22, Y-axis driving unit 23, rotation adjusting unit 24;

[0040] Screen installation frame 3: plug-in slot 31, top limit frame 32, plug-in board 33, horizontal support part 34;

[0041] Screen 4: equal height block 41, plug-in ear 42, printing mesh 43;

[0042] Scraper driving mechanism 5: a second lifting driving unit 51 and a translation driving unit 52;

[0043] Scraper 6;

[0044] Compression assembly 7;

[0045] Support plate 10 , conveyor belt 20 , battery string 100 . DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figures 1 to 3 As shown, the screen printing device in the embodiment of the present application includes a frame 1, a screen driving mechanism 2, a screen mounting frame 3 and a screen 4, wherein:

[0048] The screen driving mechanism 2 is arranged on the frame 1 .

[0049] The screen installation frame 3 is connected to the movable part of the screen driving mechanism 2, and a plug-in slot 31 with an open bottom is provided in the screen installation frame 3, and the screen 4 is plugged into the screen installation frame 4 through the plug-in slot 31. The lower surface of the screen 4 exposed to the plug-in slot 31 is provided with a height block 41, wherein the height difference between the upper slot surface of the plug-in slot 31 and the lower slot surface of the plug-in slot 31 is greater than the thickness of the screen 4 located in the plug-in slot 31.

[0050] The screen driving mechanism 2 is at least used to drive the screen mounting frame 3 to move up and down between the high position and the low position. When the screen mounting frame 3 is raised to the high position, the screen 4 is supported on the lower groove surface of the insertion groove 31. When the screen mounting frame 3 is lowered to the low position, the screen 4 is supported on the supporting surface where the workpiece to be printed is located through the equal height block 41 and is separated from the lower groove surface of the insertion groove 31.

[0051] Since the lower surface of the screen 4 is exposed to the plug-in slot 31 and the height difference between the upper slot surface of the plug-in slot 31 and the lower slot surface of the plug-in slot 31 is greater than the thickness of the screen 4 located in the plug-in slot 31, when the screen installation frame 3 is driven by the screen drive mechanism 2 to descend, the height block 41 first contacts the supporting surface where the workpiece to be printed is located. As the screen installation frame 3 continues to descend, the screen 4 cannot continue to descend due to the obstruction of the supporting surface, so it moves relative to the screen installation frame 3 and detaches from the lower slot surface of the plug-in slot 31. Finally, the screen 4 is supported on the supporting surface where the workpiece to be printed is located by the height block 41. In other words, when the screen installation frame 3 descends to a low position, the screen 4 is automatically leveled with the supporting surface. Therefore, before the workpiece to be printed is screen-printed, no additional leveling operation is required, thereby improving the screen printing efficiency.

[0052] Optionally, when the screen 4 is supported on the lower groove surface of the insertion groove 31, the lower surface of the contour block 41 is lower than the lower surface of the screen installation frame 3. In this way, when the screen installation frame 3 is driven by the screen drive mechanism 2 to descend, the contour block 41 can first contact the supporting surface where the workpiece to be printed is located. Finally, after ensuring that the screen installation frame 3 continues to descend into place, the screen 4 is supported on the supporting surface by the contour block 41.

[0053] Optionally, at least three equal-height blocks 41 are provided on the lower surface of the screen 4, and the lower surfaces of the at least three equal-height blocks 41 are located at the same height. The at least three equal-height blocks 41 support the screen 4 from different positions, so that the screen can be stably supported on the supporting surface where the workpiece to be printed is located.

[0054] like Figure 3As shown, the screen 4 is generally rectangular, and the printing mesh 43 is arranged in the middle area of ​​the screen 4. Optionally, four equal height blocks 41 are arranged on the lower surface of the screen 4, and the four equal height blocks 41 are located at the four corners of the lower surface of the screen 1. After the screen mounting frame 3 is driven by the screen driving mechanism 2 to descend to the position, the screen 4 is supported on the supporting surface by the equal height blocks 41 at the four corners, thereby ensuring the stability of the screen 4.

[0055] Optionally, three equal-height blocks 41 may be provided on the lower surface of the screen 4, and the three equal-height blocks are arranged in an isosceles triangle around the printing mesh 43. In this way, it can also be ensured that the screen 4 can be stably supported on the supporting surface.

[0056] The screen printing device of the embodiment of the present application is suitable for printing glue on a battery cell, that is, applying glue to the surface of the battery cell by screen printing. Of course, it can also print other workpieces to be printed.

[0057] like Figures 4 to 7 As shown, in an application example, the battery string 100 to be printed with glue is conveyed by a conveyor belt 20, and the battery cells thereon arrive at the glue printing station located below the screen printing device in sequence. The screen printing device prints the glue onto the battery cells located at the glue printing station. Among them, the conveying surface of the conveyor belt 20 is supported on the supporting plate 10. For the sake of simplicity of the diagram, only a section of the conveyor belt 20 and the supporting plate 10 located below the screen printing device are shown in the figure. After the current battery cell to be printed in the battery string 100 arrives at the glue printing station, the conveyor belt 20 stops conveying, and the screen driving mechanism 2 drives the screen mounting frame 3 to descend to a low position, so that the screen 4 is supported on the supporting surface of the supporting plate 10 through the equal height block 41.

[0058] like Figures 5 and 6 As shown, optionally, the screen installation frame 3 includes a top limit frame 32 and a plug-in board 33 arranged in pairs at both ends of the top limit frame 32. A horizontal support portion 34 is formed at the lower end of the plug-in board 33, and a plug-in slot 31 is formed between the horizontal support portion 34 and the top limit frame 32. The upper surface of the horizontal support portion 34 constitutes the lower slot surface of the plug-in slot 31, and the lower surface of the top limit frame 32 located directly above the horizontal support portion constitutes the upper slot surface of the plug-in slot 31. Of course, horizontal limit portions can also be provided at the upper and lower ends of the plug-in board 33, respectively, and a plug-in slot 31 is formed between the two horizontal limit portions, the upper surface of the horizontal limit portion located at the lower end constitutes the lower slot surface of the plug-in slot 31, and the lower surface of the horizontal limit portion located at the upper end constitutes the upper slot surface of the plug-in slot 31.

[0059] Correspondingly, two opposite sides of the screen 4 are respectively formed with plug-in ears 42, and the two plug-in ears 42 are respectively plugged into the two plug-in slots 31. The height difference H between the upper slot surface of the plug-in slot 31 and the lower slot surface of the plug-in slot is greater than the thickness D of the plug-in ears 42. When the screen installation frame 3 rises to a high position, the plug-in ears 42 at both ends of the screen 4 are supported on the lower slot surface of the plug-in slot 31. When the screen installation frame 3 drops to a low position, the screen 4 is supported on the supporting surface where the workpiece to be printed is located through the equal height block 41, and the plug-in ears 42 at both ends of the screen 4 are separated from the lower slot surface of the plug-in slot 31.

[0060] Since the insertion slots 31 are formed at both ends of the screen installation frame 3 , only the insertion ears 42 at both sides of the screen 4 are inserted into the insertion slots 31 , so the middle area of ​​the lower surface of the screen 4 can expose the insertion slots 31 .

[0061] In order to ensure the printing quality of the workpiece to be printed, the screen 4 is supported on the supporting surface of the workpiece to be printed by the equal height block 41, and a predetermined printing distance needs to be formed between the lower surface of the screen 4 and the workpiece to be printed, so as to ensure that the material is smoothly printed on the surface of the workpiece to be printed. To this end, the height difference between the lower surface of the equal height block 41 and the lower surface of the screen 4 needs to be adaptively set.

[0062] For example, in the case of printing the adhesive on the surface of the battery cell, the height difference between the lower surface of the contour block 41 and the lower surface of the screen 4 is optionally 1.9 mm to 2.4 mm, so that it can avoid that the printing distance between the lower surface of the screen 4 and the battery cell is too small, causing the printed adhesive dots to be flattened, and it can also avoid that the printing distance between the lower surface of the screen and the battery cell is too large, causing the adhesive to be unable to be effectively printed on the battery cell. The height difference between the lower surface of the contour block 41 and the lower surface of the screen 4 can be, for example, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm or 2.4 mm, preferably 2.1 mm to 2.2 mm.

[0063] Optionally, in addition to driving the screen 4 to rise and fall, the screen drive mechanism 2 can also adjust the position and angle of the screen 4 on the horizontal plane, thereby ensuring that the printing mesh on the screen 4 is aligned with the to-be-printed area on the workpiece to be printed. Figure 1 and Figure 4As shown, the screen driving mechanism 2 includes a first lifting driving unit 21, an X-axis driving unit 22, a Y-axis driving unit 23 and a rotation adjusting unit 24, wherein the screen 4 is connected to the driving end of the X-axis driving unit 22 through the rotation adjusting unit 24, the X-axis driving unit 22 is connected to the driving end of the first lifting driving unit 21, the first lifting driving unit 21 is connected to the driving end of the Y-axis driving unit 23, and the Y-axis driving unit 23 is installed on the frame 1. The first lifting driving unit 21 is used to drive the screen 4 to rise and fall, the X-axis driving unit 22 and the Y-axis driving unit 23 are used to drive the screen 4 to translate in the X-axis direction and the Y-axis direction respectively, so as to adjust the position of the screen 4 on the horizontal plane, and the rotation adjusting unit 24 is used to drive the screen 4 to rotate, so as to adjust the angle of the screen 4 on the horizontal plane.

[0064] Continue to refer Figure 1 and Figure 4 As shown, optionally, the screen printing device in the embodiment of the present application also includes a scraper driving mechanism 5 and a scraper 6. The scraper driving mechanism 5 is arranged on the frame 1, and the scraper 6 is connected to the movable part of the scraper driving mechanism 5 and is located above the screen 4. The scraper driving mechanism 5 is used to drive the scraper 6 to descend so that the scraper 6 rests on the screen 4 supported on the supporting surface. The scraper driving mechanism 5 is also used to drive the scraper to translate closely against the screen 4, so that the printing material on the screen 4 passes downward through the screen 4 and is printed on the workpiece to be printed.

[0065] Optionally, the scraper drive mechanism 5 includes a second lifting drive unit 51 and a translation drive unit 52, wherein the scraper 6 is connected to the driving end of the second lifting drive unit 51, and the second lifting drive unit 51 is connected to the driving end of the translation drive unit 52. The second lifting drive unit 51 is used to drive the scraper 6 to rise and fall, so that the scraper 6 abuts against the screen 4 supported on the supporting surface. The translation drive unit 52 is used to drive the scraper 6 to translate closely against the screen 4, so that the printing material on the screen 4 passes downward through the screen 4 and is printed on the workpiece to be printed.

[0066] like Figure 1 and Figure 2 As shown, optionally, a pressing assembly 7 is provided on the screen mounting frame 3, and the pressing assembly 7 is used to press the screen 4 downward. When the screen mounting frame 3 is in a high position, the pressing assembly 7 presses the screen 4 against the lower groove surface of the plug-in groove 31. When the screen mounting frame 3 is lowered to a low position, the screen 4 is supported on the supporting surface where the workpiece to be printed is located by the equal height block 41, and the pressing assembly 7 presses the screen 4 against the supporting surface.

[0067] The pressing assembly 7 presses the screen 4 downward, thereby achieving pressing and positioning of the screen 4, and preventing the screen 4 from shifting in position during the descending process or during the printing process, thereby affecting the printing quality.

[0068] Optionally, a pressing hole located above the plug-in slot 31 is provided on the screen installation frame 3, and the pressing hole is communicated with the plug-in slot 31. The pressing assembly 7 includes a pressing cylinder, which is installed on the screen installation frame 3 and located above the pressing hole. The telescopic rod of the pressing cylinder can extend downward into the plug-in slot 31 through the pressing hole to press the screen 4 downward. When it is necessary to clean and replace the screen 4, the pressing cylinder 7 controls its telescopic rod to retract upward, so that the screen 4 can be quickly released.

[0069] The embodiment of the present application further provides a glue printing device, which is used to print glue on a battery string. The glue printing device includes a conveying device and the screen printing device in any of the above embodiments.

[0070] like Figures 4 to 7 As shown, the conveying device includes a mounting bracket (not shown in the figure), a supporting plate 10, a conveyor belt driving mechanism (not shown in the figure) and a conveyor belt 20, wherein the conveyor belt driving mechanism is arranged on the mounting bracket, and the conveyor belt 20 is sleeved on the conveyor belt driving mechanism. The supporting plate 10 is mounted on the mounting bracket to support the conveying surface of the conveyor belt 20.

[0071] The conveyor belt driving mechanism is used to drive the conveyor belt 20 to convey the battery string 100, so as to convey the battery cells in the battery string 100 to the screen printing station in sequence. The screen printing device is arranged above the screen printing station, and the screen printing device is used to print glue on the battery cells conveyed to the screen printing station, wherein, when the screen mounting frame 3 is lowered to the low position, the screen 4 is supported on the supporting surface of the supporting plate through the equal height block 41.

[0072] Optionally, the conveyor belt driving mechanism includes a driving motor, an active roller and a driven roller. The active roller and the driven roller are respectively rotatably mounted on a mounting bracket. The driving motor is mounted on the mounting bracket and is drivingly connected to the active roller. The conveyor belt is sleeved between the active roller and the driven roller.

[0073] Through the cooperation of the conveying device and the screen printing device, the printing device provided in the embodiment of the present application realizes the sequential printing of the battery cells in the battery string. Before printing the glue, the screen printing device does not need to perform a leveling operation, which improves the efficiency of printing the glue on the battery string.

[0074] The embodiments of the present application also provide another structure of a glue printing device, which is used to print glue on battery cells. The glue printing device includes a carrier platform and a silk-screen printing device in any of the above embodiments. The carrier platform is arranged below the silk-screen printing device, and is used to carry the battery cells to be printed with glue. The silk-screen printing device is used to print glue on the battery cells carried on the carrier platform, wherein when the screen mounting frame 3 is lowered to a low position, the screen 4 is supported on the supporting surface of the carrier platform via the equal height block 41. Through the cooperation of the carrier platform and the silk-screen printing device, the glue printing device provided in the present application realizes automatic glue printing on battery cells. Before printing glue, the silk-screen printing device does not need to perform a leveling operation, which improves the efficiency of printing glue on the battery string.

[0075] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, not by the above description in the embodiments. Moreover, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

Claims

1. A screen printing device, characterized in that: The screen printing device comprises a frame, a screen driving mechanism, a screen mounting frame and a screen, wherein: The screen driving mechanism is arranged on the frame; The screen installation frame is connected to the movable part of the screen driving mechanism, and a plug-in slot with an open bottom is provided in the screen installation frame, and the screen is plugged into the screen installation frame through the plug-in slot, and a height block is provided at a portion of the lower surface of the screen exposed to the plug-in slot, wherein the height difference between the upper slot surface of the plug-in slot and the lower slot surface of the plug-in slot is greater than the thickness of the screen located in the plug-in slot; The screen driving mechanism is at least used to drive the screen mounting frame to rise and fall between a high position and a low position. When the screen mounting frame rises to a high position, the screen is supported on the lower groove surface of the plug-in slot; when the screen mounting frame descends to a low position, the screen is supported on the supporting surface where the workpiece to be printed is located via the equal height block and is separated from the lower groove surface of the plug-in slot.

2. The screen printing device according to claim 1, characterized in that: When the screen is supported on the lower groove surface of the inserting groove, the lower surface of the equal height block is lower than the lower surface of the screen installation frame.

3. The screen printing device according to claim 1, characterized in that: The screen printing device also includes a scraper driving mechanism and a scraper. The scraper driving mechanism is arranged on the frame, and the scraper is connected to the movable part of the scraper driving mechanism and is located above the screen. The scraper driving mechanism is used to drive the scraper to descend so that the scraper rests on the screen supported on the supporting surface. The scraper driving mechanism is also used to drive the scraper to translate closely against the screen so that the printing material on the screen passes downward through the screen and is printed on the workpiece to be printed.

4. The screen printing device according to claim 1, characterized in that: The screen installation frame includes a top limit frame and plug-in boards arranged in pairs at both ends of the top limit frame, wherein: A horizontal support portion is formed at the lower end of the plug board, and the plug-in slot is formed between the horizontal support portion and the top limit frame, wherein the upper surface of the horizontal support portion constitutes the lower slot surface of the plug-in slot, and the lower surface of the top limit frame located directly above the horizontal support portion constitutes the upper slot surface of the plug-in slot; or, horizontal limit portions are respectively formed at the upper and lower ends of the plug board, and the plug-in slot is formed between the two horizontal limit portions, wherein the upper surface of the horizontal limit portion located at the lower end constitutes the lower slot surface of the plug-in slot, and the lower surface of the horizontal limit portion located at the upper end constitutes the upper slot surface of the plug-in slot; The two opposite sides of the screen are respectively formed with plugging ears, and the two plugging ears are respectively plugged into the two plugging slots, and the height difference between the upper slot surface and the lower slot surface of the plugging slot is greater than the thickness of the plugging ears.

5. The screen printing device according to claim 1, characterized in that: At least three equal-height blocks are arranged on the lower surface of the screen, and the lower surfaces of at least three equal-height blocks are located at the same height.

6. The screen printing device according to claim 5, characterized in that: The lower surface of the screen is provided with three equal-height blocks, which are arranged in an isosceles triangle; or, the lower surface of the screen is provided with four equal-height blocks, which are located at the four corners of the lower surface of the screen.

7. The screen printing device according to claim 1, characterized in that: The height difference between the lower surface of the equal height block and the lower surface of the screen is 1.9 mm to 2.4 mm.

8. The screen printing device according to claim 1, characterized in that: The screen installation frame is provided with a pressing component, and the pressing component is used to press the screen downward.

9. The screen printing device according to claim 8, characterized in that: The screen installation frame is provided with a clamping hole located above the plug-in slot, and the clamping hole is communicated with the plug-in slot; The clamping assembly includes a clamping cylinder, which is installed on the screen installation frame and located above the clamping hole. The telescopic rod of the clamping cylinder can extend downward into the plug-in slot through the clamping hole to clamp the screen downward.

10. A rubber printing device, characterized in that: The glue printing device is used to print glue on the battery string, and the glue printing device includes a conveying device and a screen printing device according to any one of claims 1 to 9; The conveying device comprises a mounting bracket, a supporting plate, a conveyor belt driving mechanism and a conveyor belt, wherein the conveyor belt driving mechanism is arranged on the mounting bracket, and the conveyor belt is sleeved on the conveyor belt driving mechanism; the supporting plate is mounted on the mounting bracket and is used to support the conveying surface of the conveyor belt; The conveyor belt driving mechanism is used to drive the conveyor belt to convey the battery string, so as to sequentially convey the battery cells in the battery string to the screen printing station; The screen printing device is arranged above the screen printing station, and is used to print glue on the battery cells transported to the screen printing station, wherein when the screen mounting frame is lowered to a low position, the screen is supported on the supporting surface of the supporting plate via the equal height blocks.

11. A rubber printing device, characterized in that: The glue printing device is used to print glue on the battery cell, and the glue printing device includes a carrier and a screen printing device according to any one of claims 1 to 9; The carrying platform is arranged below the screen printing device and is used to carry the battery sheet to be printed with glue; The screen printing device is used for printing glue on the battery cell carried on the carrying platform, wherein when the screen installation frame is lowered to a low position, the screen is supported on the supporting surface of the carrying platform via the equal height blocks.

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