A welding device for isolation bars and busbars

Abstract

The utility model relates to photovoltaic welding equipment field, concretely for a kind of welding device for isolation strip and busbar. Including placing mechanism, and the upper pressing mechanism of being arranged above the placing mechanism;The placing mechanism includes welding base, heating piece is provided in the welding base, the top surface of the heating piece is provided with the ceramic sheet of placing busbar, and the welding base is located on the both sides of the ceramic sheet and is provided with heat insulating sheet;The upper pressing mechanism includes the cylinder being arranged above the welding base, the cylinder output end is provided with needle and roller, the needle is located just above the ceramic sheet, and the roller is located above the busbar end portion. The purpose of the placement, welding and bending of busbar and isolation strip is realized.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic welding equipment, specifically a welding device for separator strips and busbars. Background Technology

[0002] With the rapid development of clean energy sources such as solar energy, the photovoltaic manufacturing industry has also developed rapidly. Photovoltaic modules can convert solar energy into electrical energy and are gradually being widely used. In the production process of photovoltaic modules, solar cells need to be connected into strings, and then multiple strings of cells connected in series are connected by upper and lower busbars to form a cell array. In order to prevent short circuits between busbars, which would cause photovoltaic module failure, isolating strips are used to isolate the busbars, thereby reducing the probability of producing defective photovoltaic modules.

[0003] To improve efficiency, the separators and busbars are typically welded together before the busbars are welded to the solar cells. Therefore, a device needs to be designed to weld the separators and busbars together. Utility Model Content

[0004] To address the problems in the prior art, this application provides a welding apparatus for a separator strip and a busbar, thereby enabling the separator strip and the busbar to be welded together.

[0005] The technical solution is as follows: A welding device for separator strips and busbars includes a placement mechanism and an upper pressing mechanism disposed above the placement mechanism; the placement mechanism includes a welding base, a heating element is disposed inside the welding base, a ceramic sheet for placing the busbar is disposed on the top surface of the heating element, and heat insulation sheets are disposed on both sides of the ceramic sheet on the welding base; the upper pressing mechanism includes a cylinder disposed above the welding base, a pressure needle and a roller are disposed at the output end of the cylinder, the pressure needle is located directly above the ceramic sheet, and the roller is located above the end of the busbar.

[0006] Specifically, the placement mechanism further includes a mounting base, the welding base is disposed inside the mounting base, the mounting base is provided with positioning grooves at both ends of the ceramic sheet, the positioning grooves are provided with adsorption holes, the mounting base is provided with a connector, and the mounting base is provided with a channel connecting the adsorption holes and the connector.

[0007] Specifically, the mounting base is provided with positioning pins on both sides of the positioning groove.

[0008] Preferably, the positioning groove is provided with an adsorption groove.

[0009] Specifically, the welding base is provided with a through hole, and the side of the mounting base is provided with a heat dissipation hole communicating with the through hole.

[0010] Preferably, the welding base is provided with heat dissipation fins on its side.

[0011] Specifically, the piston rod of the cylinder is connected to a top plate, and the top plate is provided with an integrated plate through a connecting rod. The pressure needles are spaced apart on the integrated plate. A bracket is provided on one side of the integrated plate on the top plate, and the roller is provided at the bottom of the bracket.

[0012] Preferably, the distance from the roller to the welding base is greater than the distance from the pressure needle to the welding base.

[0013] In summary, by incorporating a placement mechanism and a pressing mechanism, the placement, welding, and bending of the busbars and separators are achieved. The placement mechanism includes a heating element to provide heat for welding, while a ceramic plate is mounted on the placement surface. The ceramic plate has relatively good thermal conductivity, allowing for more even heat distribution and preventing localized overheating and incomplete welds. Furthermore, heat insulation plates are installed on both sides of the ceramic plate to insulate against heat radiating from the welding base after the heating element stops heating, preventing heat from affecting the cooling of the solder and thus the welding result.

[0014] Simultaneously, the pressing mechanism is equipped with a pressure needle and rollers. The pressure needle presses against the surface of the separator strip, pressing the busbar and separator strip together, while the rollers bend one end of the busbar downwards. Therefore, bending can be performed simultaneously with welding the separator strip and busbar, greatly saving process time and improving overall efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the placement mechanism of this utility model; Figure 3 This is a schematic diagram of the internal structure of the welding base of this utility model.

[0016] Reference numerals: 1. Mounting base; 2. Welding base; 3. Heating element; 4. Ceramic plate; 5. Heat insulation plate; 6. Positioning pin; 7. Positioning groove; 8. Adsorption hole; 9. Connector; 10. Heat dissipation fins; 11. Heat dissipation hole; 12. Through hole; 13. Cylinder; 14. Top plate; 15. Bracket; 16. Roller; 17. Integrated plate; 18. Pressure needle; 19. Isolation strip; 20. Busbar. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0018] like Figure 1 As shown, the placement mechanism and pressing mechanism are arranged from bottom to top. The placement mechanism is used to place the busbar 20 and the isolation strip 19, and the pressing mechanism is used to press the isolation strip 19 and the busbar 20, while simultaneously bending one end of the busbar 20. Figure 2 and Figure 3 As shown, the placement mechanism includes a mounting base 1 with a recess at its center. A welding base 2 is installed within the recess, and a limiting groove is formed within the welding base 2. The shape of the limiting groove is set according to the shape of the heating element 3. The heating element 3 is installed within the limiting groove. A ceramic plate 4 is installed on the top surface of the heating element 3, and heat insulation plates 5 are installed on both sides of the ceramic plate 4 on the welding base 2. (Continue referring to...) Figure 1 As shown, the pressing mechanism includes a cylinder 13, which is positioned above the welding base 2. A pressing needle 18 and a roller 16 are installed at the output end of the cylinder 13. The cylinder 13 drives the pressing needle 18 and the roller 16 to move up and down, pressing the isolation strip 19 and the busbar 20 together, and bending one end of the busbar 20.

[0019] It should be noted that solder is applied between the isolation strip 19 and the busbar 20. The solder is melted by heating, thereby welding the isolation strip 19 and the busbar 20 together. Generally, infrared heating is used for heating, so the heating element 3 here is an infrared heater.

[0020] The busbar 20 and the spacer strip 19, coated with solder, are placed with the busbar 20 facing down on the ceramic sheet 4 and the spacer strip 19 facing up. The cylinder 13 controls the descent of the pressure needle 18 and the roller 16. The pressure needle 18 first presses against the surface of the spacer strip 19, pressing the busbar 20 and the spacer strip 19 together. The roller 16 then bends one end of the busbar 20 downwards. The heating element 3 then generates heat, melting the solder between the spacer strip 19 and the busbar 20. Finally, the heating element 3 stops working, and the solder solidifies under pressure, forming a metallurgical bond, thus welding the busbar 20 and the spacer strip 19 together. The ceramic sheet 4 has relatively good thermal conductivity, quickly and evenly transferring and diffusing the heat generated by the heating element 3 to a larger surface area, allowing for more even heat release, avoiding localized overheating, and ensuring more uniform solder melting, thus preventing incomplete soldering. Meanwhile, the heat insulation sheet 5 can isolate the heat emitted from the upper surface of the welding base 2 after the heating element 3 stops heating, so as to avoid the heat affecting the cooling of the solder and thus affecting the welding result.

[0021] like Figure 1 As shown, positioning grooves 7 are provided at both ends of the ceramic sheet 4 on the mounting base 1. The size and shape of the positioning grooves 7 are set according to the manifold 20. Adsorption holes 8 are opened in the positioning grooves 7. A connector 9 is installed on the mounting base 1. A channel connecting the adsorption holes 8 and the connector 9 is opened inside the mounting base 1. The two ends of the manifold 20 are placed in the positioning grooves 7 for positioning. The connector 9 is connected to an external air source. The external air source draws air to generate suction, adsorbing and fixing the manifold 20. This can effectively prevent the manifold 20 from shifting during welding and avoid affecting the heat transfer.

[0022] It should be noted that the ceramic plate 4 is installed higher than the heat insulation plate 5, therefore there is a gap between the ceramic plate 4 and the heat insulation plate 5, which is generally set to be less than 1mm. During cooling, heat can also be discharged to the outside through the gap, improving the cooling effect.

[0023] like Figure 2 As described above, an adsorption groove is provided on the positioning groove 7 at the adsorption hole 8, so that the adsorption hole 8 is located in the adsorption groove. The area of ​​the adsorption groove is larger than the area of ​​the adsorption hole 8, thereby increasing the contact area with the busbar 20 and improving the adsorption effect.

[0024] like Figure 2 As shown, positioning pins 6 are provided on both sides of the positioning groove 7 on the mounting base 1, and the distance between the positioning pins 6 is set according to the width of the isolation strip 19. The two ends of the isolation strip 19 are positioned by the positioning pins 6.

[0025] The busbar 20 and the isolation strip 19 are positioned by the positioning groove 7 and the positioning pin 6 respectively, so that the relative positions between the busbar 20 and the isolation strip 19 will not change, thus avoiding displacement during welding and affecting subsequent process operations.

[0026] like Figure 2 and Figure 3 As shown, a through hole 12 is provided on one side of the welding base 2, located on the side of the heating element 3, and a heat dissipation hole 11 is provided on the side of the mounting base 1. The heat dissipation hole 11 and the through hole 12 are interconnected. The heat inside the welding base 2 can be discharged to the outside through the through hole 12 and the heat dissipation hole 11. When the heating element 3 stops heating, the solder needs to cool and solidify to achieve welding. If the heat dissipation effect is poor, the solder will not be able to solidify in time, thus affecting the welding effect. Therefore, after the heating element 3 stops heating, the heat can be quickly discharged to the outside through the through hole 12 and the heat dissipation hole 11, which can quickly dissipate heat and improve the welding quality.

[0027] To further improve the heat dissipation effect, refer to Figure 2 and Figure 3 As shown, heat dissipation fins 10 are provided on the outer side of the welding base 2. The heat dissipation fins 10 can increase the contact area with the outside air, thereby increasing the heat exchange area and ultimately further improving the heat dissipation effect.

[0028] like Figure 1 As shown, a top plate 14 is provided at the piston rod end of the cylinder 13. An integrated plate 17 is provided on the top plate 14 via a connecting rod. Several pressure needles 18 are installed at intervals on the integrated plate 17. A bracket 15 is installed on one side of the integrated plate 17 on the top plate 14. A roller 16 is installed at the bottom of the bracket 15. The distance from the roller 16 to the welding base 2 is greater than the distance from the pressure needles 18 to the welding base 2. The cylinder 13 controls the top plate 14 to descend, which drives the pressure needles 18 and the roller 16 to descend simultaneously. Since the distance from the pressure needles 18 to the welding base 2 is shorter, the pressure needles 18 will preferentially press on the isolation strip 19, fixing and pressing the isolation strip 19 and the manifold 20 together. Afterwards, the roller 16 will apply a downward force to one end of the manifold 20 and bend it. To prevent the pressure needle 18 from damaging the isolation strip 19, a spring is installed on the pressure needle 18 so that the pressure needle 18 has elasticity. When the integrated plate 17 continues to move downward, the pressure needle 18 can press the isolation strip 19 and retract at the same time to avoid damaging the isolation strip 19. During operation, the busbar 20 and the isolation strip 19, coated with solder, are placed with the busbar 20 facing down on the ceramic sheet 4 and the isolation strip 19 facing up. The two ends of the busbar 20 are positioned in the positioning grooves 7, and the two ends of the isolation strip 19 are positioned by the positioning pins 6. Simultaneously, an external air source draws air to generate suction, adsorbing and fixing the busbar 20. The cylinder 13 controls the pressure needle 18 and roller 16 to descend, performing pressing and bending respectively. The heating element 3 generates heat, melting the solder between the isolation strip 19 and the busbar 20. Afterward, the heating element 3 stops working, and the internal heat is quickly discharged to the outside through the through hole 12 along the heat dissipation hole 11. The solder solidifies under pressure, forming a metallurgical bond, thus welding the busbar 20 and the isolation strip 19 together. Finally, the cylinder 13 controls the pressure needle 18 and roller 16 to move to their initial positions, and the external air source is disconnected. The robotic arm then moves the welded isolation strip 19 and busbar 20 to the next workstation. Repeat the above steps until all the isolation strips 19 and busbars 20 are welded.

[0029] Other embodiments of the present invention will readily conceive of by those skilled in the art upon consideration of the specification and practice of the specific embodiments described herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not described herein. Furthermore, there may be minor differences in the wording of the names of certain components in different embodiments; these minor differences will not affect the understanding of the present invention by those skilled in the art.

Claims

1. A welding apparatus for separator strips and busbars, characterized in that, The device includes a placement mechanism and an upper pressing mechanism disposed above the placement mechanism. The placement mechanism includes a welding base (2), a heating element (3) is disposed inside the welding base (2), a ceramic plate (4) for placing the busbar (20) is disposed on the top surface of the heating element (3), and heat insulation plates (5) are disposed on both sides of the ceramic plate (4) on the welding base (2). The upper pressing mechanism includes a cylinder (13) disposed above the welding base (2), a pressure needle (18) and a roller (16) are disposed at the output end of the cylinder (13), the pressure needle (18) is located directly above the ceramic plate (4), and the roller (16) is located above the end of the busbar (20).

2. The welding device for separator strips and busbars according to claim 1, characterized in that, The placement mechanism also includes a mounting base (1), the welding base (2) is disposed inside the mounting base (1), the mounting base (1) is provided with positioning grooves (7) at both ends of the ceramic sheet (4), the positioning grooves (7) are provided with adsorption holes (8), the mounting base (1) is provided with a connector (9), and the mounting base (1) is provided with a channel connecting the adsorption holes (8) and the connector (9).

3. The welding device for isolation strips and busbars according to claim 2, characterized in that, Positioning pins (6) are provided on both sides of the positioning groove (7) on the mounting base (1).

4. The welding device for separator strips and busbars according to claim 2, characterized in that, An adsorption groove is provided on the positioning groove (7).

5. A welding device for separator strips and busbars according to claim 2, characterized in that, The welding base (2) is provided with a through hole (12), and the side of the mounting base (1) is provided with a heat dissipation hole (11) that communicates with the through hole (12).

6. The welding apparatus for separator strips and busbars according to claim 1, characterized in that, The welding base (2) is provided with heat dissipation fins (10) on its side.

7. The welding apparatus for separator strips and busbars according to claim 1, characterized in that, The piston rod of the cylinder (13) is connected to a top plate (14), and the top plate (14) is provided with an integrated plate (17) via a connecting rod. The pressure needles (18) are spaced apart on the integrated plate (17). A bracket (15) is provided on the top plate (14) on one side of the integrated plate (17), and the roller (16) is provided at the bottom of the bracket (15).

8. The welding apparatus for separator strips and busbars according to claim 1, characterized in that, The distance from the roller (16) to the welding base (2) is greater than the distance from the pressure needle (18) to the welding base (2).

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