Device for processing photovoltaic welding strip before tin plating

Abstract

The utility model provides a processing device used before tin plating of a photovoltaic welding strip, and relates to the technical field of photovoltaic welding strips. The device comprises a box body, a copper strip is conveyed into the box body to be processed, a plurality of sand blasting nozzles communicated with sand blasting equipment are respectively arranged in the box body on the two sides of a copper strip conveying track, and a plurality of air nozzles communicated with an air source are respectively arranged in the box body on the two sides of the copper strip conveying track, the sand blasting nozzle and the air blasting nozzle are sequentially arranged according to the conveying track of the copper strip, a dust collection opening communicated with dust collection equipment is further formed in the box body, and a filter screen is arranged in the dust collection opening. According to the utility model, the copper strip is subjected to sand blasting before tin plating so as to improve the surface roughness, so that a tin coating is meshed with the copper strip, and the tin coating is prevented from falling off due to long-term thermal circulation.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic soldering technology, specifically to a treatment device for photovoltaic soldering strips before tin coating. Background Technology

[0002] Photovoltaic solder ribbon, also known as tin-plated copper ribbon or tin-coated copper ribbon, comes in two forms: busbars and interconnects. It is used to connect the cells of photovoltaic modules, playing a crucial role in conductivity and current collection. Solder ribbon is a vital raw material in the photovoltaic module welding process; its quality directly affects the current collection efficiency of the photovoltaic module, significantly impacting its power output.

[0003] In existing technologies, photovoltaic solder ribbons are subjected to long-term thermal cycling, especially in areas with large temperature differences between day and night, such as deserts. The tin coating of the photovoltaic solder ribbon is prone to peeling off, which affects the conductivity of the photovoltaic solder ribbon. Utility Model Content

[0004] The purpose of this invention is to develop a pre-tinning treatment device for photovoltaic solder strips that involves sandblasting copper strips before tinning to improve surface roughness, thereby enabling the tin coating to adhere to the copper strip and preventing the tin coating from peeling off due to long-term thermal cycling.

[0005] This utility model is achieved through the following technical solution:

[0006] A pretreatment apparatus for photovoltaic solder ribbon before tin coating, comprising:

[0007] The copper strip is fed into the enclosure for processing.

[0008] Multiple sandblasting nozzles connected to the sandblasting equipment are respectively located in the boxes on both sides of the copper belt conveyor track;

[0009] Multiple air nozzles connected to the air source are respectively located in the boxes on both sides of the copper belt conveyor track;

[0010] The sandblasting nozzle and the air jet nozzle are arranged sequentially according to the conveying trajectory of the copper strip. The box is also equipped with a dust suction port that is connected to the dust collection equipment, and a filter screen is installed in the dust suction port.

[0011] Optionally, the housing is provided with two partitions, which divide the housing into three chambers: an inlet chamber, a sandblasting chamber, and an outlet chamber. The housing and partitions are provided with multiple first strip holes at corresponding positions for multiple copper strips to pass through. The inlet chamber and the outlet chamber are provided with copper strip conveying mechanisms for controlling the conveying and tensioning of copper strips. The sandblasting nozzle and the air jet nozzle are located in the sandblasting chamber.

[0012] Optionally, the sandblasting chamber is provided with two sets of partition components, which divide the sandblasting chamber into a first chamber and a second chamber. The sandblasting nozzle is located in the first chamber, and the air jet nozzle is located in the second chamber. The angle between the spraying direction of the sandblasting nozzle and the air jet nozzle and the copper strip conveying trajectory is an acute angle.

[0013] Optionally, the separating component includes two baffles located on both sides of the copper strip conveying track. The ends of the two baffles that are close to each other are connected, and the remaining parts are connected to the inner wall of the box. A plurality of second strip holes are provided at the connection between the two baffles to allow multiple copper strips to pass through.

[0014] Optionally, the two baffles are curved in an arc shape away from the copper strip, and the dust suction port is located at the bottom of the box where the baffles connect to the side wall of the box.

[0015] Optionally, the inner walls of both the first and second perforated sections are covered with a number of bristles.

[0016] Optionally, the copper strip conveying mechanism includes a conveying roller and a drive roller group that are rotatably arranged. The drive roller group includes a driving roller and a driven roller. The conveying roller and the driven roller are respectively provided with a conveying belt groove and a driven belt groove that are positioned accordingly. The driving roller is provided with a driving ring that makes rolling contact with the inner wall of the driven belt groove.

[0017] Optionally, the conveying rollers and drive rollers are arranged sequentially in the inlet cavity according to the conveying trajectory of the copper strip, and the drive rollers and conveying rollers are arranged sequentially in the outlet cavity according to the conveying trajectory of the copper strip.

[0018] Optionally, a tensioning assembly is provided between the conveyor roller and the drive roller group. The tensioning assembly includes multiple elastically sliding tensioning wheels. Each tensioning wheel has a tensioning groove corresponding to the position of the conveyor belt groove and the driven belt groove. A column is provided inside the housing on the side of the multiple tensioning wheels. A spring telescopic rod connected to the column is rotatably connected to each tensioning wheel.

[0019] Optionally, the inner walls of the conveyor belt groove, tension belt groove, and driven belt groove are all provided with a layer of rubber material, and the driving ring is made of rubber.

[0020] The beneficial effects of this utility model are:

[0021] This invention involves sandblasting the copper strip before tin coating and then using clean gas to flush away any residue on the surface of the copper strip, thus creating a rough surface. In subsequent processes, the copper strip is cleaned and then chemically roughened before tin coating, which allows the tin coating to adhere to the copper strip, preventing the tin coating from peeling off due to long-term thermal cycling. The rough surface of the copper strip also increases the contact area between the tin coating and the copper strip, improving the conductivity of the photovoltaic solder ribbon. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the present utility model;

[0024] Figure 2 This is a structural diagram of the copper belt conveyor mechanism.

[0025] Reference numerals: 1. Box body; 2. Inlet chamber; 3. Sandblasting chamber; 4. Outlet chamber; 5. Baffle; 6. Conveyor roller; 7. Tensioner wheel; 8. Column; 9. Spring telescopic rod; 10. Driving roller; 11. Driven roller; 12. Driving ring; 13. Sandblasting nozzle; 14. Baffle; 15. Dust suction port; 16. Air nozzle; 17. First belt hole; 18. Conveyor belt groove; 19. Tensioner belt groove; 20. Driven belt groove. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0027] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2 As shown, this utility model discloses a processing device for photovoltaic solder ribbon before tin coating, including a box 1. The box 1 is provided with two vertically arranged and parallel partitions 5. The two partitions 5 divide the box 1 into three cavities. After the copper ribbon enters the box 1, it passes through the three cavities in sequence and is then output. In the copper ribbon conveying direction, the three cavities are, in sequence, the inlet cavity 2, the sandblasting cavity 3, and the output cavity 4.

[0031] Both the inlet chamber 2 and the outlet chamber 4 are equipped with copper strip conveying mechanisms, which are symmetrical about the sandblasting chamber 3. Specifically, the copper strip conveying mechanism in the inlet chamber 2 includes a conveying roller 6 and a drive roller group, which are arranged sequentially according to the copper strip conveying direction. Correspondingly, in the outlet chamber 4, the drive roller group and the conveying roller 6 are arranged sequentially according to the copper strip conveying direction. A tensioning assembly is provided between the conveying roller 6 and the drive roller group.

[0032] Figure 2 The copper strip conveying mechanism in cavity 2 only conveys one copper strip. The conveying roller 6 is vertically rotating and has multiple conveyor belt grooves 18 arranged at equal intervals along its axial direction. The conveyor belt grooves 18 are coaxially opened along the outer circumference of the conveying roller 6, and the width of the conveyor belt grooves 18 is adapted to the copper strip.

[0033] The drive roller assembly includes a vertically rotating drive roller 10 and a driven roller 11. The driven roller 11 is provided with multiple driven belt grooves 20 whose positions and numbers correspond to the conveyor belt grooves 18. The width of the driven belt grooves 20 is also adapted to the copper belt. The multiple driven belt grooves 20 are at the same horizontal height as the multiple conveyor belt grooves 18.

[0034] The driving roller 10 is located on the side of the driven roller 11. The driving roller 10 is provided with multiple driving rings 12 corresponding to the positions of multiple driven grooves 20. The driving rings 12 are sleeved on the driving roller 10. The width of the driving rings 12 does not exceed the width of the driven grooves 20, and the thickness of the driving rings 12 is not less than the depth of the driven grooves 20. The driving roller 10 is close to the driven roller 11, so that the outer wall of the driving rings 12 is in close rolling contact with the inner wall of the driven grooves 20. The driving roller 10 is driven by a drive source located inside or outside the housing 1. The drive source can be a motor or a rotating platform.

[0035] The tensioning assembly includes a vertically mounted column 8 inside the housing 1. Multiple tensioning rollers 7 are arranged at equal intervals in the vertical direction on the side of the column 8. The positions of the tensioning rollers 7 correspond to multiple conveyor belt grooves 18 and driven belt grooves 20, respectively. Tensioning grooves 19 are formed on the tensioning rollers 7, and their widths are adapted to the copper strip. The positions of the multiple tensioning grooves 19 correspond to the multiple conveyor belt grooves 18 and driven belt grooves 20, respectively. A spring-loaded telescopic rod 9 connects the tensioning rollers 7 and the column 8. The spring-loaded telescopic rod 9 is perpendicular to the conveying direction of the copper strip within the housing 1. One end of the spring-loaded telescopic rod 9 is fixedly connected to the column 8, and the other end is rotatably connected to the tensioning rollers 7.

[0036] The inner walls of the conveyor belt trough 18, driven belt trough 20, and tension belt trough 19 are all provided with a layer of rubber material, and the driving ring 12 is also made of rubber.

[0037] On the side wall of the housing 1, which is away from the sandblasting chamber 3, there are multiple first belt holes 17 corresponding to multiple conveyor belt grooves 18. On the two partitions 5, there are multiple first belt holes 17 corresponding to multiple driven belt grooves 20. The width and thickness of the first belt holes 17 are slightly larger than the copper strip. The inner wall of the first belt holes 17 is covered with bristles, which serve to block dust.

[0038] Multiple copper strips, corresponding to the number of conveyor belt grooves 18, are fed into the cavity 2 via multiple first belt holes 17 on the side box 1 of the cavity 2. The copper strips are respectively wound around multiple conveyor belt grooves 18 on the conveyor roller 6, tension belt grooves 19 on multiple tension rollers 7, and driven belt grooves 20 on the driven roller 11, and then enter the sandblasting cavity 3 via the first belt hole 17 on the partition 5. The copper strips leave the sandblasting cavity 3 via the first belt hole 17 on another partition 5 and enter the output cavity 4. In the output cavity 4, the copper strips are respectively wound around multiple driven belt grooves 20 on the driven roller 11, tension belt grooves 19 on multiple tension rollers 7, and conveyor belt grooves 18 on the conveyor roller 6, and then exit the box 1 via the first belt hole 17 on the side box 1 of the output cavity 4.

[0039] The sandblasting chamber 3 is equipped with two sets of partition components, which divide the sandblasting chamber 3 into a first chamber and a second chamber. The first chamber and the second chamber are arranged sequentially according to the conveying direction of the copper strip.

[0040] The separating component includes two baffles 14 located on both sides of the copper strip conveying track. The two baffles 14 are curved in an arc shape away from the copper strip. The ends of the two baffles 14 that are close to each other are connected, and the ends that are far from each other are connected to the side wall of the housing 1. The top and bottom of the two baffles 14 are connected to the top and bottom of the housing 1, respectively. At the connection between the two baffles 14, there are multiple second strip holes corresponding to the positions of multiple first strip holes 17 on the partition 5. The width and thickness of the second strip holes are adapted to the first strip holes 17. The length of the second strip holes (the length in the copper strip conveying direction) is longer than the first strip holes 17. The inner wall of the second strip holes is also covered with a number of dust-blocking bristles.

[0041] Both the first chamber and the second chamber are provided with two dust suction ports 15. The two dust suction ports 15 are located on both sides of the copper belt conveyor track and at the bottom of the box 1 where the baffle 14 is connected to the box 1. The dust suction ports 15 are provided with filters with larger pore sizes. The filters are mainly used to prevent larger dust particles not generated by sandblasting from entering the dust suction ports 15. The dust suction ports 15 are connected to the dust collection equipment (not shown in the figure).

[0042] The first cavity contains first support rods on both sides of the copper strip conveying track. Each first support rod is equipped with multiple sandblasting nozzles 13, the number and position of which correspond to the copper strip. The spraying direction of the sandblasting nozzles 13 forms an acute angle with the copper strip conveying track. The sandblasting nozzles 13 are connected to a sandblasting device (not shown in the figure), and the sandblasting nozzles 13 spray out microbeads that bombard the surface of the copper strip.

[0043] The second chamber has second support rods on both sides of the copper strip conveying track. Each second support rod has multiple air nozzles 16, the number and position of which correspond to the copper strip. The spray direction of the air nozzles 16 forms an acute angle with the copper strip conveying track. The air nozzles 16 are connected to a clean air source, and spray clean gas to wash away residues on the surface of the copper strip.

[0044] When the sandblasting nozzle 13 and air jet nozzle 16 in the first and second chambers are working, the dust collection equipment draws in the dust suction port 15 to collect the microbeads and waste generated by sandblasting.

[0045] This invention involves sandblasting the copper strip before tin coating and then using clean gas to flush away any residue on the surface of the copper strip, thus creating a rough surface. In subsequent processes, the copper strip is cleaned and then chemically roughened before tin coating, which allows the tin coating to adhere to the copper strip, preventing the tin coating from peeling off due to long-term thermal cycling. The rough surface of the copper strip also increases the contact area between the tin coating and the copper strip, improving the conductivity of the photovoltaic solder ribbon.

[0046] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A pretreatment device for photovoltaic solder ribbon before tin coating, characterized in that, include: The copper strip is fed into the enclosure for processing. Multiple sandblasting nozzles connected to the sandblasting equipment are respectively located in the boxes on both sides of the copper belt conveyor track; Multiple air nozzles connected to the air source are respectively located in the boxes on both sides of the copper belt conveyor track; The sandblasting nozzle and the air jet nozzle are arranged sequentially according to the conveying trajectory of the copper strip. The box is also equipped with a dust suction port that is connected to the dust collection equipment, and a filter screen is installed in the dust suction port.

2. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to claim 1, characterized in that, The box is equipped with two partitions, which divide the box into three chambers: an inlet chamber, a sandblasting chamber, and an outlet chamber. The box and the partitions are provided with multiple first strip holes for multiple copper strips to pass through. The inlet chamber and the outlet chamber are equipped with copper strip conveying mechanisms to control the conveying and tensioning of copper strips. The sandblasting nozzle and the air jet nozzle are located in the sandblasting chamber.

3. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to claim 2, characterized in that, The sandblasting chamber is provided with two sets of partition components, which divide the sandblasting chamber into a first chamber and a second chamber. The sandblasting nozzle is located in the first chamber, and the air jet nozzle is located in the second chamber. The spraying direction of the sandblasting nozzle and the air jet nozzle forms an acute angle with the copper strip conveying trajectory.

4. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to claim 3, characterized in that, The separating component includes two baffles located on both sides of the copper strip conveying track. The ends of the two baffles that are close to each other are connected, and the remaining parts are connected to the inner wall of the box. Multiple second strip holes are provided at the connection between the two baffles to allow multiple copper strips to pass through.

5. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to claim 4, characterized in that, The two baffles are curved in an arc shape away from the copper strip, and the dust suction port is located at the bottom of the box where the baffles connect to the side wall of the box.

6. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to claim 4, characterized in that, The inner walls of both the first and second perforated sections are covered with a number of bristles.

7. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to any one of claims 2 to 6, characterized in that, The copper strip conveying mechanism includes a conveying roller and a drive roller group that are rotatably arranged. The drive roller group includes a driving roller and a driven roller. The conveying roller and the driven roller are respectively provided with a conveying strip groove and a driven strip groove that are positioned accordingly. The driving roller is provided with a driving ring that rolls in contact with the inner wall of the driven strip groove.

8. The pretreatment apparatus for photovoltaic solder ribbons before tin coating according to claim 7, characterized in that, The conveying rollers and drive rollers are arranged sequentially in the inlet cavity according to the copper strip's conveying trajectory, and the drive rollers and conveying rollers are arranged sequentially in the outlet cavity according to the copper strip's conveying trajectory.

9. The pretreatment apparatus for photovoltaic solder ribbons before tin coating according to claim 7, characterized in that, A tensioning assembly is also provided between the conveyor roller and the drive roller group. The tensioning assembly includes multiple elastically sliding tensioning wheels. Each tensioning wheel has a tensioning groove corresponding to the position of the conveyor belt groove and the driven belt groove. A column is provided inside the box on the side of the multiple tensioning wheels. A spring telescopic rod connected to the column is rotatably connected to the tensioning wheel.

10. The pretreatment apparatus for photovoltaic solder ribbon before tin coating according to claim 9, characterized in that, The inner walls of the conveyor belt trough, tension belt trough, and driven belt trough are all provided with a layer of rubber material, and the driving ring is made of rubber.

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