Photovoltaic solder strip coating machine

Abstract

The utility model relates to a kind of photovoltaic welding strip coating machines, including rack, brushing assembly, coating assembly and feed assembly.Brushing assembly includes shell, brushing roller and driving part.The circumferential side of brushing roller is equipped with multiple annular grooves.Brushing roller circumferential side is immersed in welding material.Photovoltaic welding strip enters shell from welding strip import, after passing through corresponding annular groove along the tangent direction of annular groove, it is from welding strip export and is worn out shell.Feed assembly is used to provide welding material to material groove.Coating assembly includes first coating diaphragm.A plurality of first coating holes are evenly and spacedly provided on first coating diaphragm.First coating hole is passed through from its inside for welding strip, and first coating gap is formed between its inner wall and the surface of strip material.The utility model can uniformly coat welding material to the surface of welding strip by the cooperation of brushing assembly and coating assembly, and the thickness of welding material coating is controllable, and then realizes that welding material is efficiently and high quality coated.

Description

Technical Field

[0001] This utility model relates to the technical field of photovoltaic ribbon coating machines, and in particular to a photovoltaic ribbon coating machine. Background Technology

[0002] Photovoltaic ribbon is a key conductive material in the manufacture of solar cell modules, mainly used to connect cells in series and collect and transmit current. It is usually made of high-purity copper substrate plated with tin, which has both excellent conductivity and oxidation resistance. Its precisely designed thickness and width directly affect the power output of the module.

[0003] In existing technologies, coating machines work by passing solder ribbons through a container filled with liquid soldering material, which coats the surface of the ribbons with the material. Commonly used soldering materials include solder paste and silver paste. However, after the solder ribbons pass through the container, the uniformity of the soldering material coating on the surface is poor, leading to a deterioration in the quality of the solder ribbon products. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a photovoltaic ribbon coating machine.

[0005] The photovoltaic ribbon coating machine provided by this utility model adopts the following technical solution:

[0006] A photovoltaic ribbon coating machine includes a frame, a brushing assembly, a coating assembly, and a feeding assembly. The brushing assembly includes a housing, a brushing roller, and a driving component. The housing has an internal receiving space. A material trough is formed on the inner bottom wall of the housing for holding welding material. The receiving space communicates with the material trough. A feeding hole is formed in the material trough. Multiple annular grooves are formed on the circumference of the brushing roller. The axis of the brushing roller is perpendicular to the conveying direction of the welding ribbon. The annular grooves are coaxial with the brushing roller, and the multiple annular grooves are spaced apart along the axis of the brushing roller. The brushing roller is mounted within the receiving space. The portion of the brushing roller facing the material trough is immersed radially into the welding material in the material trough. The housing has multiple welding ribbon inlets and multiple welding ribbon outlets. The welding ribbon inlets and the annular grooves... The groove and the welding strip outlet correspond one-to-one; the photovoltaic welding strip enters the housing from the welding strip inlet, passes through the corresponding annular groove along the tangential direction of the annular groove, and exits the housing from the welding strip outlet; the driving component is mounted on the frame and is used to drive the brush roller to rotate, so that the annular groove carries welding material in the material groove and coats the welding material onto the surface of the photovoltaic welding strip; the feeding component is used to supply welding material to the material groove; the feeding component has a discharge port, which communicates with the feeding hole; the coating component includes a first coating film; a plurality of first coating holes are evenly spaced on the first coating film; the first coating holes correspond one-to-one with the welding strip outlet and are directly opposite each other; the welding strip passes through the first coating hole, and a first coating gap is formed between its inner wall and the surface of the welding strip.

[0007] Optionally, the outer casing includes a shell and two surrounding bodies; the shell is hollow; the material groove is formed on the inner bottom wall of the shell; each surrounding body has an arc-shaped surface; the arc-shaped surface is part of a cylindrical surface, and its axis is the same as the axis of the brush roller; the two surrounding bodies are arranged symmetrically and at intervals with respect to the axial section of the brush roller in the vertical direction; the receiving space is formed between the two arc-shaped surfaces; an upper opening is formed between the tops of the two surrounding bodies, and a lower opening is formed between their bottoms; the top of the brush roller protrudes from the upper opening into the receiving space so that the welding strip can pass through the annular groove; the lower opening communicates with the material groove; the bottom of the brush roller protrudes from the lower opening into the receiving space and is immersed in the welding material.

[0008] Optionally, each of the enclosures has a plurality of guide blocks evenly spaced along the axial direction of the brush roller on its upper side; a guide groove is formed between two adjacent guide blocks on the same enclosure; the guide groove corresponds one-to-one with the annular groove and is used to guide the welding strip.

[0009] Optionally, the direction of movement of the brush roller at the tangent position to the welding strip is the same as the conveying direction of the welding strip; multiple baffles are evenly spaced along the axial direction of the brush roller on the arc-shaped surface of the enclosure located downstream of the welding strip conveying direction; each baffle corresponds to one of the annular grooves; one end of each baffle is disposed on the arc-shaped surface, and the other end extends to the opening of the corresponding annular groove.

[0010] Optionally, the coating assembly further includes a second coating film; the second coating film is located downstream of the first coating film in the conveying direction of the solder strip; a plurality of second coating holes are uniformly spaced on the second coating film; each of the second coating holes corresponds to a solder strip outlet; the solder strip passes through the second coating hole, and a second coating gap is formed between the inner wall of the second coating hole and the surface of the solder strip; the interval between two adjacent second coating holes is equal to the interval between two adjacent first coating holes; the width of the second coating gap is equal to the width of the first coating gap.

[0011] Optionally, the first coated film is disposed on the side of the housing where the solder strip outlet is located.

[0012] Optionally, the opening diameter of the first coating hole and the second coating hole located upstream in the welding strip conveying direction is larger than the opening diameter located downstream in the welding strip conveying direction; the first coating gap is the gap between the inner wall of the smaller opening of the first coating hole and the surface of the welding strip; the second coating gap is the gap between the inner wall of the smaller opening of the second coating hole and the surface of the welding strip.

[0013] Optionally, the feeding assembly includes a conveying pump assembly, a gravity flow assembly, or a pressurized conveying assembly.

[0014] Optionally, the pressurized conveying assembly includes a clamping caliper, a material syringe, an air supply plate, and a discharge head; the clamping caliper is mounted on the frame; the material syringe is clamped in the clamping caliper; a piston is disposed inside the material syringe; the piston divides the material syringe into a pressure zone and a storage zone; the discharge head is mounted on the frame and is connected to the head of the material syringe; the discharge port is located on the discharge head, communicates with the storage zone, and is connected to the feed hole through a pipeline; the air supply plate is located at the tail of the material syringe and has an air hole; one side of the air hole is connected to an air source, and the other side is connected to the pressure zone, for introducing compressed air into the pressure zone to push the piston.

[0015] Optionally, the photovoltaic ribbon coating machine further includes a controller, a weight sensor, and an alarm device; the weight sensor is mounted on the outer casing and is communicatively connected to both the controller and the alarm device, used to weigh the total weight of the outer casing and the objects inside it and transmit the total weight to the controller; the controller has a preset weight threshold; the controller is communicatively connected to the air source of the air supply plate, used to control the air source of the air supply plate to stop supplying air when the total weight is greater than or equal to the weight threshold, and to control the air source of the air supply plate to continue supplying air when the total weight is less than the weight threshold, and also used to control the alarm device to issue an alarm when the air source of the air supply plate continues to supply air but the total weight does not change.

[0016] As described above, the photovoltaic ribbon coating machine of this invention has at least the following beneficial effects:

[0017] 1. By combining the brushing component and the coating component, welding material can be uniformly coated onto the surface of the welding strip, and the thickness of the welding material coating is controllable, thereby achieving efficient and high-quality coating of welding material.

[0018] 2. Through closed-loop control formed between the controller and the weight sensor, the feeding timing of the feeding mechanism can be accurately controlled, ensuring sufficient welding material in the material trough. This guarantees normal and efficient brushing by the brush roller, further improving the coating quality and efficiency. An alarm device can promptly remind workers that the material syringe is empty and needs replenishment, contributing to improved efficiency of the photovoltaic ribbon coating machine. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic ribbon coating machine.

[0020] Figure 2 This is a schematic diagram of the solder ribbon passing through the brush assembly.

[0021] Figure 3 This is a schematic diagram of the internal structure of the outer shell.

[0022] Figure 4 This is a schematic diagram of the brush roller structure and the way the annular groove and the stop bar work together.

[0023] Figure 5 This is a schematic diagram of the material trough structure.

[0024] Figure 6 This is a schematic diagram of the feed hole structure.

[0025] Figure 7 This is a schematic diagram of the first coated film structure.

[0026] Figure 8 yes Figure 1A magnified view of part A in the middle.

[0027] Reference numerals: 1. Frame; 11. Base plate; 12. Support; 2. Brushing assembly; 21. Outer shell; 211. Housing; 212. Enclosure; 2121. Arc-shaped surface; 2122. Top opening; 2123. Bottom opening; 213. Material trough; 214. Feeding hole; 215. Welding strip inlet; 216. Welding strip outlet; 217. Guide block; 218. Guide groove; 22. Brushing roller; 221. Annular groove; 23. Drive Moving parts; 230, stop bar; 3, coating assembly; 31, first coating film; 311, first coating hole; 32, second coating film; 321, second coating hole; 4, feeding assembly; 41, clamping caliper; 411, mounting plate; 412, movable buckle; 413, pull rod; 42, material syringe; 43, air supply plate; 44, discharge head; 45, limiting component; 46, limiting groove; 5, welding strip; 6, string welding machine cutter. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0029] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0030] Please refer to Figure 1-8This utility model discloses a photovoltaic ribbon coating machine, which includes a frame 1, a brushing assembly 2, a coating assembly 3, and a feeding assembly 4.

[0031] First, it should be noted that during the coating process, the weld strip 5 is unwound from its roll, passes through the photovoltaic weld strip coating machine, and is then rewound or introduced into equipment such as a string welding machine. During its passage through the photovoltaic weld strip coating machine, the weld strip 5 remains taut and its conveying direction is fixed. Furthermore, to improve coating efficiency, the photovoltaic weld strip coating machine can simultaneously coat multiple parallel-conveyed weld strips 5, such as ten, twenty, forty, or more.

[0032] Please refer to Figures 2-6 The brush assembly 2 is used to apply welding material to the surface of the welding strip 5. The brush assembly 2 includes a housing 21, a brush roller 22, and a drive component 23.

[0033] The brush roller 22 is cylindrical in shape, with multiple annular grooves 221 on its circumference. The axis of the brush roller 22 is perpendicular to the conveying direction of the welding strip 5. The annular grooves 221 are coaxial with the brush roller 22, and the multiple annular grooves 221 are arranged at intervals along the axial direction of the brush roller 22.

[0034] The outer casing 21 has an internal receiving space. A material groove 213 is formed on the inner bottom wall of the outer casing 21 for holding welding materials. The receiving space communicates with the material groove 213. A feeding hole 214 is formed inside the material groove 213. The feeding hole 214 can be located on either the side wall or the bottom wall of the material groove 213. In this embodiment, the feeding hole 214 is located on the bottom wall of the material groove 213.

[0035] The outer casing 21 has multiple welding strip inlets 215 and multiple welding strip outlets 216. Each welding strip inlet 215, annular groove 221, and welding strip outlet 216 corresponds to another welding strip inlet 215. The number of welding strip inlets 215, annular grooves 221, and welding strip outlets 216 is the same as the number of strands of welding strip 5 transported in parallel. The welding strip 5 enters the outer casing 21 through the welding strip inlet 215, passes through the corresponding annular groove 221 along the tangential direction of the annular groove 221, and exits the outer casing 21 through the corresponding welding strip outlet 216.

[0036] The brush roller 22 is mounted within the receiving space. The portion of the brush roller 22 facing the material trough 213 is immersed radially into the welding material within the material trough 213. The drive unit 23 is mounted on the frame 1 and is used to drive the brush roller 22 to rotate.

[0037] The frame 1 includes a base plate 11 and a support 12. The base plate 11 is flat. The support 12 is mounted on the base plate 11 and protrudes from the upper surface of the base plate 11. The outer shell 21 is mounted on the upper part of the support 12, so that the height of the welding strip inlet 215 and the welding strip outlet 216 is consistent with the height of the welding strip 5 being conveyed, so that the welding strip 5 can smoothly enter the outer shell 21.

[0038] As a portion of the periphery of the brush roller 22 is immersed in the welding material within the trough 213, the welding material in the trough 213 fills the portion of the annular groove 221 located within the trough 213. When the brush roller 22 rotates, the welding material carried in the annular groove 221 within the trough 213 rotates with the brush roller 22 until it contacts the welding ribbon 5 at its upper part, thus applying the welding material onto the welding ribbon 5. A portion of the welding material located at the upper part of the brush roller 22 is applied to the welding ribbon, while the remaining portion returns to the trough 213 as the brush roller 22 rotates.

[0039] Please refer to Figure 3 , Figure 5 Specifically, the outer casing 21 includes a housing 211 and two surrounding bodies 212. The housing 211 is hollow. The housing 211 can be cuboid or other suitable shapes. In this embodiment, the housing 211 is cuboid. The width direction of the housing 211 is parallel to the conveying direction of the welding strip 5, and the length direction is parallel to the axial direction of the brush roller 22. The welding strip inlet 215 is located on the side of the housing 211 upstream of the conveying direction of the welding strip 5 in the width direction. The welding strip outlet 216 is located on the other side of the housing 211 in the width direction.

[0040] A material groove 213 is formed on the inner bottom wall of the housing 211. The opening of the material groove 213 faces the brush roller 22 so that the brush roller 22 can enter the material groove 213. The shape of the opening of the material groove 213 is just large enough for the brush roller 22 to enter it. The edge of the opening of the material groove 213 fits against the periphery of the brush roller 22 to reduce the situation where welding material enters the annular groove 221 and then falls out of the annular groove 221. Therefore, in a preferred embodiment of this utility model, the material groove 213 is a cuboid groove. And the size of the opening of the material groove 213 is such that during the rotation of the brush roller 22, the periphery of the brush roller 22 fits against the edge of the material groove 213.

[0041] The two enclosures 212 are identical in shape. Each enclosure 212 has an arcuate surface 2121. The arcuate surface 2121 is part of a cylindrical surface, and its axis is the same as the axis of the brush roller 22. The two enclosures 212 are arranged symmetrically and at intervals with respect to the axial section of the brush roller 22 in the vertical direction. A receiving space is formed between the two arcuate surfaces 2121. An upper opening 2122 is formed between the tops of the two enclosures 212, and a lower opening 2123 is formed between their bottoms. The top of the brush roller 22 protrudes from the upper opening 2122 into the receiving space so that the welding strip 5 can pass through the annular groove 221. The lower opening 2123 communicates with the material trough 213. The bottom of the brush roller 22 protrudes from the lower opening 2123 into the receiving space and is immersed in the welding material. The bottom surface of the enclosure 212 is in contact with the inner bottom wall of the shell 211, and the side opposite to the arcuate surface 2121 and the inner wall of the shell 211 that is close to it, thereby reducing the leakage of welding material from the gap between the enclosure 212 and the inner wall of the shell 211.

[0042] More specifically, the inner diameter of the receiving space is larger than the diameter of the brush roller. However, if the inner diameter of the receiving space is too large, the welding material will fall through the gap between the brush roller 22 and the inner wall of the receiving space during its movement to the top of the brush roller 22, affecting the brushing quality of the brush roller 22. Therefore, the inner diameter of the receiving space is 1-3 mm larger than the diameter of the brush roller 22, for example, 1 mm, 2 mm, or 3 mm.

[0043] Please continue to refer to Figure 3 , Figure 5 The direction of movement of the brush roller 22 at the tangent position to the welding strip 5 is the same as the conveying direction of the welding strip 5. Multiple stop bars 230 are evenly spaced along the axial direction of the brush roller 22 on the arc-shaped surface 2121 of the enclosure 212 located downstream of the conveying direction of the welding strip 5. Each stop bar 230 corresponds to a corresponding annular groove 221. One end of each stop bar 230 is positioned on the arc-shaped surface 2121, and the other end extends to the opening of the corresponding annular groove 221.

[0044] During the process of coating the welding strip 5 with welding material within the annular groove 221, it may bend, deviate from its original conveying direction, or even break due to the pressure of the welding material. To reduce the deviation of the welding strip 5 from the conveying direction, multiple guide blocks 217 are evenly spaced along the axial direction of the brush roller 22 on the upper side of each enclosure 212. A guide groove 218 is formed between two adjacent guide blocks 217 on the same enclosure 212. The guide groove 218 corresponds one-to-one with the annular groove 221, and is directly aligned with its corresponding annular groove 221. The interval between two adjacent guide blocks 217, i.e., the width of the guide groove 218, is less than or equal to the width of the annular groove 221. By setting the guide groove 218, the welding strip 5 is guided both when entering and leaving the annular groove 221, which can effectively reduce the deviation of the welding strip 5 from the conveying direction.

[0045] The drive component 23 can be a servo motor, which is mounted on the upper part of the bracket 12, adjacent to the housing 211. One end of the brush roller 22 is coaxially connected to a drive shaft and extends out of the housing 211. The end of the drive shaft extending out of the housing 211 is driven by a gear chain or by a belt and pulley.

[0046] Please refer to Figure 1 , Figure 7 After the welding strip 5 passes through the annular groove 221, its surface is coated with welding material. However, the distribution of welding material on the welding strip 5 is still uneven. In order to make the welding material on the welding strip 5 evenly distributed and reach the specified thickness, the welding strip 5 also needs to pass through the coating component 3.

[0047] Specifically, the coating assembly 3 includes a first coating film 31. The first coating film 31 is elongated. A plurality of first coating holes 311 are evenly spaced along the length of the first coating film 31. The first coating holes 311 correspond one-to-one with the solder strip outlet 216 and are directly opposite each other. The solder strip 5 passes through the first coating holes 311, and a first coating gap is formed between the inner wall of the first coating hole 311 and the surface of the solder strip 5.

[0048] After the welding strip 5 coated with welding material passes through the first coating hole 311, the welding material on its surface is scraped evenly by the first coating hole 311, and the thickness of the welding material is the width of the first coating gap, so that the welding material is evenly coated on the surface of the welding strip 5 and the thickness is the width of the first coating gap.

[0049] More specifically, the length of the first coating film 31 is equal to the length of the housing 211, and it is disposed on the side of the housing 211 where the solder strip outlet 216 is provided. This eliminates the need for a separate structure to install the first coating film 31 on the frame 1, thereby reducing the space occupied by the first coating film 31.

[0050] Please refer to Figure 7 In a preferred embodiment of the present invention, the stop bar 230 penetrates the enclosure 212 and the first coated film 31, making the stop bar 230 more securely installed.

[0051] In practical applications, during the process of the solder ribbon 5 passing through the first coating hole 311, a small amount of welding material will overflow from the outlet of the first coating hole 311. The overflowed welding material is prone to clumping and falling off at the outlet of the first coating hole 311, and then adhering to the solder ribbon 5, affecting the coating quality of the solder ribbon 5.

[0052] To remove the clumps of welding material adhering to the solder ribbon 5, the coating assembly 3 further includes a second coating film 32. The second coating film 32 is located downstream of the first coating film 31 in the conveying direction of the solder ribbon 5. The second coating film 32 has a plurality of second coating holes 321. Each second coating hole 321 corresponds one-to-one with the solder ribbon outlet 216. The solder ribbon 5 passes through the second coating holes 321, and a second coating gap is formed between its inner wall and the surface of the solder ribbon 5. The width of the second coating gap is equal to the width of the first coating gap.

[0053] The opening diameter of the first coating hole 311 and the second coating hole 321 upstream in the conveying direction of the welding strip 5 is larger than the opening diameter of the opening downstream in the conveying direction of the welding strip 5. The first coating gap is the gap between the inner wall of the smaller diameter opening of the first coating hole 311 and the surface of the welding strip 5. The second coating gap is the gap between the inner wall of the smaller diameter opening of the second coating hole 321 and the surface of the welding strip 5. That is, both the first coating hole 311 and the second coating hole 321 are funnel-shaped, which facilitates the entry of the welding strip 5 into them, and the thickness of the welding material coating on the surface of the welding strip 5 can be controlled by controlling the size of the first coating gap and the second coating gap.

[0054] It should be noted that, Figure 1 The structure to which the second coated film 32 is attached is not shown. The position of the second coated film 32 and its distance from the first coated film 31 can be adaptively set according to actual production needs. Figure 1 The image shows the situation where the welding strip 5 passes through the second coated film 32 and enters the wire bonding machine cutter 6.

[0055] The feeding assembly 4 is used to supply welding material to the material trough 213. The feeding assembly 4 has a discharge port that communicates with the feeding hole 214. The feeding assembly 4 can be a conveying pump assembly, a gravity flow assembly, a pressurized conveying assembly, or other suitable components with feeding functions.

[0056] The delivery pump assembly includes a delivery pump and a barrel. The welding material is stored in the barrel. The outlet of the delivery pump is the discharge port. The delivery pump is connected to the barrel and pumps the welding material in the barrel to the feed port 214.

[0057] The gravity-fed assembly includes a barrel, the outlet of which is the discharge port. The barrel is positioned at a height higher than the feed port 214, allowing the welding material inside the barrel to flow automatically to the feed port 214 under gravity.

[0058] Please refer to Figure 1 , Figure 8In this embodiment, the feeding assembly 4 is a pressurized conveying assembly. The pressurized conveying assembly includes a clamping clamp 41, a material syringe 42, an air supply plate 43, and a discharge head 44. The clamping clamp 41 is mounted on the frame 1. The material syringe 42 is clamped in the clamping clamp 41. A piston is installed inside the material syringe 42. The piston divides the inside of the material syringe 42 into a pressure zone and a storage zone. The discharge head 44 is mounted on the frame 1 and is connected to the head of the material syringe 42. The discharge port is located on the discharge head 44, communicates with the storage zone, and is connected to the feeding hole 214 through a pipeline. The air supply plate 43 is located at the tail of the material syringe 42 and has an air hole. One side of the air hole is connected to an air source, and the other side is connected to the pressure zone, for introducing compressed air into the pressure zone to push the piston.

[0059] Specifically, the clamping caliper 41 includes a mounting plate 411, two movable latches 412, and two pull rods 413. The mounting plate 411 is fixedly mounted on the base plate 11 of the frame 1 and is located on the side of the discharge head 44 near the tail of the material syringe 42. The two movable latches 412 are spaced apart on the upper side of the mounting plate 411, with the material syringe 42 positioned between the two movable latches 412. A pull rod 413 is fixedly mounted on each movable latch 412. When the movable latches 412 open or close, they can drive the two pull rods 413 to move axially along the material syringe 42. The ends of the two pull rods 413 away from the movable latches 412 are fixedly connected to the air supply plate 43.

[0060] When the two movable latches 412 are closed, the two pull rods 413 move towards the discharge head 44, causing the air supply plate 43 to move towards the discharge head 44, thereby pressing the head of the material syringe 42 against the discharge head 44. When the two movable latches 412 are opened, the two pull rods 413 move away from the discharge head 44, causing the air supply plate 43 to move away from the discharge head 44, thereby releasing the head of the material syringe 42 from the discharge head 44, allowing the material syringe 42 to be disassembled.

[0061] To ensure precise alignment between the head of the material syringe 42 and the discharge head 44, the clamping caliper 41 also includes a limiting member 45. The limiting member 45 is mounted on the base plate 11, located between the discharge head 44 and the mounting plate 411. A limiting groove 46, with a diameter matching that of the material syringe 42, is provided on the upper side of the limiting member 45. The limiting groove 46 is coaxial with the material syringe 42. The material syringe 42 is embedded in the limiting groove 46 and can slide axially within it. The limiting groove 46 prevents the material syringe 42 from shifting during alignment with the discharge head 44, ensuring that the welding material inside the material syringe 42 is smoothly discharged from the discharge head 44.

[0062] In a preferred embodiment of this invention, the photovoltaic ribbon coating machine further includes a controller, a weight sensor, and an alarm device. The weight sensor is mounted on the housing 21 and is communicatively connected to both the controller and the alarm device. It is used to weigh the total weight of the housing 21 and the objects inside it, and transmit the total weight to the controller. The controller has a preset weight threshold. The controller is communicatively connected to the air source of the air supply plate 43. It is used to stop supplying air to the air supply plate 43 when the total weight is greater than or equal to the weight threshold, and to continue supplying air to the air supply plate 43 when the total weight is less than the weight threshold. It is also used to control the alarm device to sound an alarm when the air supply plate 43 continues to supply air but the total weight does not change.

[0063] Since only the weight of the welding material changes over time within the outer casing 21, the total weight only changes with the weight of the welding material. The total weight when the material tank 213 is full of welding material is the weight threshold. For example, the preset weight threshold in the controller is 400g. When the total weight is greater than or equal to 400g, it indicates that there is enough welding material in the material tank 213 to ensure normal brushing by the brush roller 22. When the total weight is less than 400g, it indicates that there is insufficient welding material in the material tank 213, which may affect the normal brushing by the brush roller 22. In this case, the controller controls the air supply plate 43 to supply air to the material syringe 42 in a timely manner, so that the material syringe 42 continuously supplies material to the material tank 213 until the total weight is greater than or equal to 400g again. When the air supply plate 43 continues to supply air but the total weight does not change, it indicates that there is no welding material in the material syringe 42, and the material syringe 42 needs to be replaced or welding material needs to be added to the material syringe 42. The alarm device can issue alarms in the form of sound alarm and light alarm.

[0064] Through closed-loop control formed between the controller and the weight sensor, the feeding timing of the feeding mechanism can be accurately controlled, ensuring sufficient welding material in the material trough 213, thereby guaranteeing normal and efficient material brushing by the brush roller 22. An alarm device can promptly remind workers that the material syringe 42 is empty of welding material and needs to be replenished, which helps improve the working efficiency of the photovoltaic ribbon coating machine.

[0065] The implementation principle of the photovoltaic ribbon coating machine of this utility model is as follows: The feeding mechanism injects welding material into the material tank 213 through the feeding hole 214 at the bottom of the material tank 213. The brush roller 22 rotates, carrying the welding material in the material tank 213 to the upper part of the brush roller 22 through the annular groove 221. At the same time, the welding ribbon 5 enters the housing 211 from the welding ribbon inlet 215 on the housing 211 and passes through the annular groove 221. The welding material in the annular groove 221 is brushed onto the surface of the welding ribbon 5. Then the welding ribbon 5 exits the housing 21 from the welding ribbon outlet 216. After exiting the housing 21, the welding ribbon 5 first passes through the first coating film 31, and the welding material on the surface of the welding ribbon 5 is scraped evenly through the first coating gap. Then it passes through the second coating film 32, which removes the clumps of welding material carried by the welding ribbon 5 at the first coating hole 311. Finally, the welding ribbon 5 enters the string welding machine or is wound up.

[0066] Compared with the prior art, this utility model, through the cooperation of the brushing component 2 and the coating component 3, can uniformly coat the welding material onto the surface of the welding strip 5, and the thickness of the welding material coating is controllable, thereby achieving efficient and high-quality coating of the welding material.

[0067] Furthermore, the closed-loop control formed between the controller and the weight sensor can accurately control the feeding timing of the feeding mechanism, ensuring sufficient welding material in the material trough 213. This guarantees that the brushing roller 22 brushes the material normally and efficiently, further improving the coating quality and efficiency. An alarm device can promptly remind workers that the material syringe 42 is empty and needs to be replenished, which helps improve the working efficiency of the photovoltaic ribbon coating machine.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A photovoltaic ribbon coating machine, characterized in that, It includes a frame (1), a brushing assembly (2), a coating assembly (3), and a feeding assembly (4); among which, The brush assembly (2) includes a housing (21), a brush roller (22), and a drive component (23). The interior of the outer shell (21) has a receiving space; a material groove (213) is provided on the inner bottom wall of the outer shell (21) for holding welding materials; the receiving space is connected to the material groove (213); a feeding hole (214) is provided in the material groove (213). The brush roller (22) has multiple annular grooves (221) on its circumference; the axis of the brush roller (22) is perpendicular to the conveying direction of the welding strip (5); the annular grooves (221) are coaxial with the brush roller (22), and the multiple annular grooves (221) are arranged at intervals along the axial direction of the brush roller (22); the brush roller (22) is mounted in the accommodating space; the portion of the brush roller (22) facing the material groove (213) is immersed in the welding material in the material groove (213) along the radial direction of the brush roller (22); The outer shell (21) has multiple welding strip inlets (215) and multiple welding strip outlets (216); the welding strip inlets (215), the annular grooves (221) and the welding strip outlets (216) correspond one-to-one; the welding strip (5) enters the outer shell (21) from the welding strip inlet (215), passes through the corresponding annular groove (221) along the tangential direction of the annular groove (221) and exits the outer shell (21) from the welding strip outlet (216); The driving component (23) is mounted on the frame (1) and is used to drive the brush roller (22) to rotate, so that the annular groove (221) carries the welding material in the material groove (213) and applies the welding material to the surface of the photovoltaic welding strip (5); The feeding assembly (4) is used to supply welding material to the material tank (213); the feeding assembly (4) has a discharge port; the discharge port is connected to the feeding hole (214); The coating assembly (3) includes a first coating film (31); a plurality of first coating holes (311) are evenly spaced on the first coating film (31); the first coating holes (311) correspond one-to-one with the solder strip outlet (216) and are directly opposite each other; the first coating holes (311) allow the solder strip (5) to pass through them, and a first coating gap is formed between the inner wall of the first coating hole (311) and the surface of the solder strip (5).

2. The photovoltaic ribbon coating machine according to claim 1, characterized in that: The outer casing (21) includes a shell (211) and two enclosures (212). The shell (211) is hollow; the material trough (213) is formed on the inner bottom wall of the shell (211); Each of the enclosing bodies (212) has an arcuate surface (2121); the arcuate surface (2121) is part of a cylindrical surface, and its axis is the same as the axis of the brush roller (22); the two enclosing bodies (212) are arranged symmetrically and at intervals with respect to the axial section of the brush roller (22) in the vertical direction; the receiving space is formed between the two arcuate surfaces (2121); An upper opening is formed between the tops of the two enclosures (212), and a lower opening is formed between their bottoms; the top of the brush roller (22) protrudes from the upper opening into the receiving space so that the welding strip (5) can pass through the annular groove (221); the lower opening communicates with the material trough (213); the bottom of the brush roller (22) protrudes from the lower opening into the receiving space and is immersed in the welding material.

3. The photovoltaic ribbon coating machine according to claim 2, characterized in that: Each of the enclosure bodies (212) has a plurality of guide blocks (217) evenly spaced along the axial direction of the brush roller (22) on its upper side; a guide groove (218) is formed between two adjacent guide blocks (217) on the same enclosure body (212); the guide groove (218) corresponds one-to-one with the annular groove (221) and is directly aligned with the corresponding annular groove (221) for guiding the welding strip (5).

4. The photovoltaic ribbon coating machine according to claim 3, characterized in that: The direction of movement of the brush roller (22) at the position where it is tangent to the welding strip (5) is the same as the conveying direction of the welding strip (5); On the arc-shaped surface (2121) of the enclosure (212) located downstream of the conveying direction of the welding strip (5), a plurality of baffles (230) are evenly spaced along the axial direction of the brush roller (22); the baffles (230) correspond one-to-one with the annular groove (221); One end of the stop bar (230) is disposed on the arc-shaped surface (2121), and the other end extends to the opening of the corresponding annular groove (221).

5. The photovoltaic ribbon coating machine according to claim 1, characterized in that: The coating assembly (3) further includes a second coating film (32); the second coating film (32) is located downstream of the first coating film (31) in the conveying direction of the solder strip (5); The second coating film (32) has a plurality of second coating holes (321) evenly spaced apart; the second coating holes (321) correspond one-to-one with the solder strip outlet (216); the second coating holes (321) allow the solder strip (5) to pass through them, and a second coating gap is formed between the inner wall of the second coating hole (321) and the surface of the solder strip (5); the interval between two adjacent second coating holes (321) is equal to the interval between two adjacent first coating holes (311); the width of the second coating gap is equal to the width of the first coating gap.

6. The photovoltaic ribbon coating machine according to claim 5, characterized in that, The first coated film (31) is disposed on the side of the housing (21) where the solder strip outlet (216) is located.

7. The photovoltaic ribbon coating machine according to claim 5, characterized in that, The opening diameter of the first coating hole (311) and the second coating hole (321) located upstream of the conveying direction of the welding strip (5) is larger than the opening diameter located downstream of the conveying direction of the welding strip (5); The first coating gap is the gap between the inner wall of the smaller opening of the first coating hole (311) and the surface of the solder strip (5); the second coating gap is the gap between the inner wall of the smaller opening of the second coating hole (321) and the surface of the solder strip (5).

8. The photovoltaic ribbon coating machine according to claim 1, characterized in that, The feeding assembly (4) includes a conveying pump assembly, a gravity flow assembly, or a pressurized conveying assembly.

9. The photovoltaic ribbon coating machine according to claim 8, characterized in that, The pressurized conveying assembly includes a clamping clamp (41), a material syringe (42), an air supply plate (43), and a discharge head (44). The clamping caliper (41) is mounted on the frame (1); The material syringe (42) is clamped on the clamping caliper (41); a piston is provided inside the material syringe (42); the piston divides the inside of the material syringe (42) into a pressure zone and a storage zone; The discharge head (44) is mounted on the frame (1) and is connected to the head of the material syringe (42); the discharge port is opened on the discharge head (44), communicates with the storage area, and is connected to the feed hole (214) through a pipeline; The air supply plate (43) is located at the tail of the material syringe (42) and has an air hole on it; one side of the air hole is connected to the air source and the other side is connected to the pressure zone, which is used to introduce compressed air into the pressure zone to push the piston.

10. The photovoltaic ribbon coating machine according to claim 9, characterized in that, The photovoltaic ribbon coating machine also includes a controller, a weight sensor, and an alarm device; The weight sensor is mounted on the housing (21) and is communicatively connected to both the controller and the alarm device. It is used to weigh the total weight of the housing (21) and the objects inside it and transmit the total weight to the controller. The controller has a preset weight threshold; the controller is communicatively connected to the air source of the air supply plate (43), and is used to control the air source of the air supply plate (43) to stop supplying air when the total weight is greater than or equal to the weight threshold, and to control the air source of the air supply plate (43) to continue supplying air when the total weight is less than the weight threshold, and is also used to control the alarm device to issue an alarm when the air source of the air supply plate (43) continues to supply air but the total weight does not change.

Images