Busbar welding device

Abstract

The application provides a busbar welding device, which comprises a welding bearing table and a welding head. The welding head is arranged above the welding bearing table, and an electromagnetic heating assembly is arranged in the welding head. The welding head is used for pressing a welding wire group at the end of a battery string to a busbar on the welding bearing table, and heating the pressed welding wire group and the busbar through the electromagnetic heating assembly. A protruding part is arranged at the bottom of the welding head, or a protruding part is arranged on the welding bearing table. When the welding head presses the welding wire group at the end of the battery string to the busbar on the welding bearing table, the protruding part is used for bending the welding wire group between the battery piece at the end of the battery string and the bearing surface downward or upward. The busbar welding device provided by the application can bend the welding wire group between the battery piece at the end of the battery string and the bearing surface upward or downward. The bent part of the welding wire group is away from the welding area, so that the potential difference in the welding wire group is reduced, the induced current in the welding wire group is small, and the risk of melting of the welding wire is reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module production equipment, specifically a busbar welding device. Background Technology

[0002] After the battery strings are arranged into battery string groups, a busbar welding device is needed to weld the busbars to the welding wire group at the end of the battery string.

[0003] The busbar welding device includes a welding support platform and a welding head. The welding support platform has a bearing plane for supporting the busbar. The welding head is provided with a receiving cavity, and an electromagnetic heating component is installed in the receiving cavity. A base plate covers the bottom opening of the receiving cavity, and the bottom surface of the base plate is flat and used to press the welding wire assembly.

[0004] The welding head presses the welding wire assembly at the end of the battery string onto the busbar on the welding platform via a base plate. Then, an electromagnetic heating component inside the welding head electromagnetically heats the busbar and welding wire assembly to weld them together. Due to the electromagnetic influence of the heating component, an induced current is generated within the welding wire, causing it to heat up. When the welding wire is very thin, the wire is prone to melting due to excessive heating when using this busbar welding device. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a busbar welding device, the detailed technical solution of which is as follows:

[0006] A busbar welding device is used to weld welding wire assemblies from the ends of battery strings to busbars. The busbar welding device includes a welding support platform and a welding head, wherein:

[0007] The welding support platform is equipped with a bearing surface for supporting the busbar;

[0008] The welding head is positioned above the welding support platform. An electromagnetic heating component is installed inside the welding head. A pressing surface is provided at the bottom of the welding head. The welding head is used to press the welding wire group at the end of the battery string onto the busbar located on the welding support platform via the pressing surface, and to heat the pressed welding wire group and busbar via the electromagnetic heating component.

[0009] The bottom of the welding head is provided with a protrusion, which is located on the side of the clamping surface and the bottom of the protrusion is lower than the clamping surface; or, the welding support platform is provided with a protrusion, which is located on the side of the support surface and the top of the protrusion is higher than the support surface.

[0010] When the welding head presses the welding wire group at the end of the battery string to the busbar located on the welding support platform, the protrusion is used to bend the welding wire group located between the battery cell at the end of the battery string and the support surface downward or upward.

[0011] The busbar welding device provided in this application has a protrusion at the bottom of the welding head or on the welding support platform. When the welding head presses the welding wire group at the end of the battery string onto the busbar located on the welding support platform, the protrusion can bend the welding wire group located between the battery cell at the end of the battery string and the support surface upward or downward.

[0012] The bent portion of the welding wire is moved away from the welding area, thus reducing the potential difference within the wire bundle. Consequently, the induced current within the wire bundle decreases, reducing wire heating and ultimately lowering the risk of wire meltdown.

[0013] In some embodiments, the protrusion is a ridge extending along a first direction, the ridge being used to bend all the welding wires in the welding wire group; or, the protrusion includes a plurality of protrusions spaced apart along the first direction, each protrusion being used to bend at least one welding wire in the welding wire group; wherein, the first direction is parallel to the length direction of the bearing surface.

[0014] By using continuous raised strips to unify all the welding wires in the bending welding wire group, the complexity of the protrusion preparation and the difficulty of cleaning the protrusions are reduced. Using several spaced protrusions in conjunction with the bending welding wire group allows for the release of expansion stress under high-temperature conditions. The minute expansion of each protrusion can be absorbed within its own local area, thus preventing bending deformation of the protrusions and ensuring the bending effect.

[0015] In some embodiments, the welding head includes a base and a bottom plate, wherein: the base has a downwardly opening mounting cavity, the electromagnetic heating assembly is disposed in the mounting cavity, the bottom plate is detachably mounted on the bottom of the base and closes the mounting cavity, and the lower surface of the bottom plate forms a pressing surface; the protrusion is fixedly connected to the bottom plate, or the protrusion is integrally formed on the bottom plate, and the protrusion is used to bend the welding wire assembly downward.

[0016] By providing a downward-opening mounting cavity within the base and detachably mounting the base plate to the bottom of the base, the disassembly and maintenance of the electromagnetic heating assembly are facilitated. The protrusion is fixedly connected to the base plate, allowing for maintenance and replacement of the protrusion. The protrusion being integrally molded onto the base plate enhances its structural stability.

[0017] In some embodiments, the base plate is a non-metallic plate, and the protrusion is a non-metallic protrusion.

[0018] The non-metallic base plate and protrusions can avoid interference with the electromagnetic heating component, allowing the electromagnetic heating component to smoothly perform electromagnetic induction heating on the busbar and welding wire.

[0019] In some embodiments, the bottom of the base is provided with a plurality of first air inlets at intervals along the length of the pressing surface, and the first air inlets are used to blow air toward the welding wire group located outside the bearing surface.

[0020] During the welding process, air is blown onto the welding wire assembly through the first air inlet at the bottom of the base to cool the welding wire and further reduce the risk of the welding wire melting.

[0021] In some embodiments, the welding support platform includes a mounting base and a plurality of welding stations, wherein each welding station is mounted on the mounting base in a vertically floating manner and is spaced apart along a first direction, the top surface of the plurality of welding stations constitutes a bearing surface, and the plurality of welding stations are used to cooperate in bearing a busbar extending along the first direction; a protrusion is mounted on the mounting base and located on one side of each welding station, the top of the protrusion is higher than the top surface of the welding station after being compressed, the protrusion is fixedly connected to or integrally formed on the mounting base, and the protrusion is used to bend the welding wire assembly upward.

[0022] The welding support platform is set up with several welding stations that can float up and down to ensure that when the welding head is pressed down, all the welding wires in the welding wire group can be pressed tightly onto the busbar on the corresponding welding station. This avoids the possibility that some welding wires cannot be pressed tightly onto the busbar due to the uneven bearing surface of the welding support platform, resulting in a false weld.

[0023] The protrusion is fixedly connected to the mounting base, allowing for maintenance and replacement. The protrusion being integrally molded onto the mounting base enhances its structural stability.

[0024] In some embodiments, the protrusion is a ridge extending along a first direction, the ridge being used to bend all the welding wires in the welding wire group; or, the protrusion includes a plurality of protrusions spaced apart along the first direction, each protrusion being used to bend at least one welding wire in the welding wire group.

[0025] By using continuous raised strips to unify all the welding wires in the bending welding wire group, the complexity of the protrusion preparation and the difficulty of cleaning the protrusions are reduced. Using several spaced protrusions in conjunction with the bending welding wire group allows for the release of expansion stress under high-temperature conditions. The minute expansion of each protrusion can be absorbed within its own local area, thus preventing bending deformation of the protrusions and ensuring the bending effect.

[0026] In some embodiments, the welding support platform includes a mounting base and a plurality of welding stations, wherein each welding station is mounted on the mounting base in a vertically floating manner and is spaced apart along a first direction, the top surface of the plurality of welding stations constitutes a bearing surface, and the plurality of welding stations are used to cooperate in bearing a busbar extending along the first direction; a protrusion is mounted on the first side surface of each welding station, the top of the protrusion is higher than the top surface of the welding station, the protrusion is fixedly connected to or integrally formed on the welding station, and the protrusion is used to bend the welding wire assembly upward.

[0027] The welding support platform is configured with several floating welding stations to ensure that when the welding stations press down, all the welding wires in the welding wire group are pressed firmly onto the busbars on the corresponding welding stations. This prevents some welding wires from failing to be pressed onto the busbars due to uneven bearing surfaces of the welding support platform, which could result in incomplete welding. Protrusions are installed on the first side of each welding station, allowing the protrusions to float up and down with the welding stations. This ensures that the top of the protrusion is always higher than the top surface of the welding station, allowing the protrusions to bend the welding wire group.

[0028] The protrusions are fixedly connected to the first side of each welding station, facilitating maintenance and replacement. The protrusions are integrally molded onto the welding station, thus improving their structural stability.

[0029] In some embodiments, the protrusion includes a protrusion corresponding to a welding station, each protrusion being mounted on a first side of the corresponding welding station, and each protrusion being used to bend a welding wire carried by the corresponding welding station.

[0030] The protrusions are configured as protrusions that correspond one-to-one with the soldering station, so that each protrusion can rise, fall and float independently with its corresponding soldering station.

[0031] In some embodiments, the mounting base is provided with a mounting groove for each welding station, the lower end of the welding station is inserted into the corresponding mounting groove, and a spring is provided between the bottom of the welding station and the bottom of the corresponding mounting groove.

[0032] The welding station is spring-loaded and elastically mounted in a mounting slot on the mounting base, allowing it to float up and down relative to the base. This ensures that during welding, when the welding wire is compressed, all the wires are tightly pressed against the busbar, preventing incomplete welds. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the busbar welding device according to the first embodiment of this application;

[0034] Figure 2 A schematic diagram of the welding wire assembly after being bent by the busbar welding device of the first embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the welding support platform in the first embodiment of this application;

[0036] Figure 4 This is a cross-sectional schematic diagram of the welding support platform in the first embodiment of this application;

[0037] Figure 5 A schematic diagram of the welding head in the first embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the welding head structure after the base plate is removed in the first embodiment of this application;

[0039] Figure 7 This is a schematic diagram of an assembly method for the welding support platform and the protrusion in the second embodiment of this application;

[0040] Figure 8 A schematic diagram of the welding wire assembly after being bent by the busbar welding device of the second embodiment of this application;

[0041] Figure 9 This is a schematic diagram of the welding head structure in the second embodiment of this application;

[0042] Figure 10 This is a schematic diagram of another assembly method for the welding support platform and protrusion in the second embodiment of this application.

[0043] Figures 1 to 10 Includes:

[0044] Welding support platform 1: mounting base 11, welding station 12, mounting groove 13, spring 14, suction cup 15, air blowing block 16, second air blowing port 17;

[0045] Welding head 2: base 21, bottom plate 22, mounting cavity 23, first air outlet 24;

[0046] Protrusion 3;

[0047] Welding wire assembly 100, busbar 200, battery cell 300, bending section 101; Detailed Implementation

[0048] 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.

[0049] As described in the background section, in existing busbar welding devices, the welding head presses the welding wire assembly at the end of the battery string onto the busbar on the welding support platform via a base plate. Subsequently, an electromagnetic heating component inside the welding head electromagnetically heats the busbar and the welding wire assembly to weld them together. However, when the welding wire is very thin, the welding wire is prone to melting and breaking when using the busbar welding device with the above structure.

[0050] In view of this, this application provides a busbar welding apparatus for welding the welding wire group at the end of the battery string to the busbar. The busbar welding apparatus provided in this application will be described exemplarily below through embodiments. Example

[0051] like Figures 1 to 2 As shown, the busbar welding device in this embodiment includes a welding support platform 1 and a welding head 2, wherein:

[0052] The welding support platform 1 is provided with a support surface for supporting the busbar.

[0053] The welding head 2 is positioned above the welding support platform 1. An electromagnetic heating component is installed inside the welding head 2. A pressing surface is provided at the bottom of the welding head 2. The welding head 2 is used to press the welding wire group 100 at the end of the battery string onto the busbar 200 located on the welding support platform 1 via the pressing surface, and to heat the pressed welding wire group 100 and busbar 200 via the electromagnetic heating component, thereby welding the welding wire group 100 onto the busbar 200.

[0054] The bottom of the welding head 2 is provided with a protrusion 3, which is located on the side of the clamping surface of the welding head 2 (e.g., the left side), and the bottom of the protrusion 3 is lower than the clamping surface of the welding head 2.

[0055] When the welding head 2 presses the welding wire assembly 100 at the end of the battery string to the busbar 200 located on the welding support table 1, the protrusion 3 is used to bend the welding wire assembly 100 between the battery cell 300 at the end of the battery string and the support surface of the welding support table 1 downward, thereby forming a downwardly bent section 101 on the welding wire assembly 100.

[0056] The bent portion (i.e., the bent section 101) of the welding wire assembly 100 is away from the welding area. As a result, during the welding process, the potential difference within the welding wire assembly 100 is reduced, and correspondingly, the induced current within the welding wire assembly 100 is reduced, thereby reducing the heating of the welding wire and thus reducing the risk of the welding wire melting and breaking.

[0057] like Figure 5 As shown, the protrusion 3 can be a ridge extending along a first direction (such as the X direction), which is used to bend all the welding wires in the welding wire group 100, wherein the first direction is parallel to the length direction of the bearing surface.

[0058] Using continuous convex strips to uniformly bend all the welding wires in the welding wire group 100 can reduce the complexity of the preparation of the protrusion 3 and facilitate the cleaning of the protrusion 3.

[0059] Of course, the protrusion 3 may also include a number of protrusions spaced apart along the first direction, each protrusion being used to bend at least one welding wire in the welding wire group 100.

[0060] By using a number of spaced protrusions in conjunction with the bending welding wire assembly 100, the expansion stress under high temperature environment can be released. The slight expansion of each protrusion can be absorbed within its own local area, thereby avoiding bending deformation of the protrusion 3 and ensuring the bending effect of the welding wire assembly 100.

[0061] like Figures 5 to 6As shown, optionally, the welding head 2 includes a base 21 and a bottom plate 22, wherein: the base 21 is provided with a downward-opening mounting cavity 23, the electromagnetic heating component is disposed in the mounting cavity 23, the bottom plate 22 is detachably installed at the bottom of the base 21 and closes the mounting cavity 23, and the lower surface of the bottom plate 22 forms a pressing surface.

[0062] The protrusion 3 can be fixedly connected to the base plate 22, for example, by adhesive bonding or by screwing it onto the base plate 22. Of course, the protrusion 3 can also be integrally formed on the base plate 22.

[0063] By providing a downward-opening mounting cavity 23 within the base 21 and detachably mounting the base plate 22 to the bottom of the base 21, the disassembly and maintenance of the electromagnetic heating assembly are facilitated. The protrusion 3 is fixedly connected to the base plate 22, facilitating the maintenance and replacement of the protrusion 3. The protrusion 3 is integrally formed on the base plate 22, thereby improving the structural stability of the protrusion 3.

[0064] Optionally, the base plate 22 can be a non-metallic plate, such as a ceramic plate, carbon fiber plate, or mica plate. The protrusion 3 can also be a non-metallic protrusion, such as a ceramic protrusion, a carbon fiber protrusion, or a mica protrusion.

[0065] Since the base plate 22 and the protrusion 3 are both made of non-metallic materials, they can avoid interference with the electromagnetic heating component, allowing the electromagnetic heating component to successfully perform electromagnetic induction heating on the busbar and welding wire.

[0066] like Figures 5 to 6 As shown, optionally, the bottom of the base 21 is provided with a plurality of first air inlets 24 at intervals along the length of the pressing surface. The first air inlets 24 are used to blow air toward the welding wire group 100 located outside the bearing surface of the welding bearing table 1.

[0067] During the welding process, air is blown onto the welding wire assembly 100 through the first air outlet 24 at the bottom of the base 21 to cool the welding wire and further reduce the risk of the welding wire melting.

[0068] like Figures 3 to 4 As shown, optionally, the welding support platform 1 includes a mounting base 11 and a plurality of welding stations 12, wherein each welding station 12 is mounted on the mounting base 11 in a floating manner and is spaced apart along a first direction (such as the X direction), the top surface of the plurality of welding stations 12 constitutes a bearing surface, and the plurality of welding stations 12 are used to cooperate in bearing the busbar extending along the first direction.

[0069] The welding support platform 1 is configured as a number of welding stations 12 that can float up and down, so that when the welding head 2 presses down, it can press all the welding wires in the welding wire group 100 onto the busbar 200 on the corresponding welding station 12. This avoids the possibility that some welding wires cannot be pressed onto the busbar 200 due to the uneven bearing surface of the welding support platform 1, resulting in a false weld.

[0070] like Figure 4 As shown, optionally, each soldering station 12 is provided with a mounting groove 13 on the mounting base 11, the lower end of the soldering station 12 is inserted into the corresponding mounting groove 13, and a spring 14 is provided between the bottom of the soldering station 12 and the bottom of the corresponding mounting groove 13.

[0071] The welding station 12 is elastically mounted in the mounting groove 13 on the mounting base 11 by a spring 14, allowing the welding station 12 to float up and down relative to the mounting base 11. This ensures that during the welding process, when the busbar 200 is pressed, all the welding stations 12 can be in close contact with the bottom surface of the busbar 200, thereby ensuring that the busbar 200 is in contact with each welding wire and preventing incomplete welding.

[0072] like Figure 3 As shown, optionally, the welding support platform 1 also includes at least two suction cups 15 spaced apart on the mounting base 11 along a first direction. When the busbar is placed on the welding stations 12, each suction cup 15 is used to cooperate in adsorbing the busbar, thereby adsorbing and positioning the busbar on the welding stations 12 and preventing the busbar from shifting position.

[0073] like Figures 3 to 4 As shown, optionally, the welding support platform 1 also includes an air blowing block 16 disposed on the side wall of the mounting base 11. The air blowing block 16 is provided with a plurality of second air blowing ports 17 at intervals along the first direction. The second air blowing ports 17 are used to blow air toward the welding station 12 so that the solder between the heated welding wire and the busbar can solidify quickly. Example

[0074] The busbar welding device in this embodiment has a basically the same structure as the busbar welding device in the first embodiment. For the sake of brevity, the following description only focuses on the differences between this embodiment and the first embodiment. For the other similar parts, please refer to the relevant description in the first embodiment.

[0075] For example, the welding head 2 in this embodiment is the same as the welding head 2 in the first embodiment, except that it no longer has the protrusion 3. Therefore, the specific structure of the welding head 2 will not be described in detail below.

[0076] like Figures 7 to 9As shown in the embodiment of this application, the protrusion 3 is no longer provided on the welding head 2, but is instead provided on the welding support table 1 and located on the side of the support surface of the welding support table 1. The top of the protrusion 3 is higher than the support surface of the welding support table 1.

[0077] With this configuration, when the welding head 2 presses the welding wire group 100 at the end of the battery string to the busbar 200 located on the welding support platform 1, the protrusion 3 bends upward the welding wire group 100 located between the battery sheet 300 at the end of the battery string and the support surface, thereby forming an upwardly bent section 101 on the welding wire group 100.

[0078] Similarly, since the bent portion of the welding wire assembly 100 (i.e., the bent section 101) is far from the welding area, the potential difference within the welding wire assembly 100 decreases during welding. Consequently, the induced current within the welding wire assembly 100 decreases, reducing the heating of the welding wire and thus lowering the risk of the welding wire melting off.

[0079] like Figure 7 As shown, to ensure that when the welding head 2 is pressed down, all the welding wires in the welding wire group 100 are pressed tightly onto the busbar 200 on the corresponding welding station 12, the welding support platform 1 may optionally include a mounting base 11 and a plurality of welding stations 12, wherein each welding station 12 is respectively mounted on the mounting base 11 in a vertically floating manner and is spaced apart along a first direction (such as the X direction), the top surface of the plurality of welding stations 12 constitutes a bearing surface, and the plurality of welding stations 12 are used to cooperate in bearing the busbar extending along the first direction.

[0080] like Figure 7 As shown, the protrusion 3 can be mounted on the mounting base 11 and located on one side (e.g., the right side) of each soldering station 12, with the top of the protrusion 3 higher than the top surface of the soldering station 12 after being pressed. The protrusion 3 can be fixedly connected to the mounting base 11, for example, by adhesive bonding or by screwing it onto the mounting base 11. Of course, the protrusion 3 can also be integrally formed on the mounting base 11.

[0081] Since the top of the protrusion 3 is higher than the top surface of the welding station 12 after being pressed, when the welding head 2 presses down and presses each welding wire in the welding wire group 100 onto the corresponding welding station 12, the protrusion 3 can bend the welding wire group 100 upward.

[0082] The protrusion 3 is fixedly connected to the mounting base 11, which facilitates the maintenance and replacement of the protrusion 3. The protrusion 3 is integrally formed on the mounting base 11, which improves the structural stability of the protrusion 3.

[0083] The protrusion 3 can be a raised strip extending along the first direction, and the raised strip is used to bend all the welding wires in the welding wire group 100. Using a continuous raised strip to bend all the welding wires in the welding wire group 100 can reduce the manufacturing complexity of the protrusion 3 and facilitate the cleaning of the protrusion 3.

[0084] Of course, the protrusion 3 may also include a number of protrusions spaced apart along the first direction, each protrusion being used to bend at least one welding wire in the welding wire assembly 100. By using a number of spaced protrusions in conjunction with the bending welding wire assembly 100, the expansion stress under high temperature conditions can be released. The slight expansion of each protrusion can be absorbed within its own local area, thereby avoiding bending deformation of the protrusion 3 and ultimately ensuring the bending effect of the welding wire assembly 100.

[0085] like Figure 10 As shown, the protrusion 3 can also be installed on the first side of each soldering station 12, with the top of the protrusion 3 higher than the top surface of the soldering station 12. The protrusion 3 can be fixedly connected to the soldering station 12, for example, by adhesive bonding or by screwing it onto the soldering station 12. Of course, the protrusion 3 can also be integrally formed on the soldering station 12.

[0086] To avoid the protrusion 3 obstructing the independent floating of each welding station 12, the protrusion 3 may optionally include a protrusion corresponding to each welding station 12. Each protrusion is installed on the first side of the corresponding welding station 12, and each protrusion is used to bend a welding wire carried by the corresponding welding station 12.

[0087] like Figure 10 As shown in this embodiment, optionally, the base plate 22 is a non-metallic plate, such as a ceramic plate, carbon fiber plate, mica plate, etc. The protrusion 3 can be a non-metallic protrusion or a metallic protrusion.

[0088] Since the base plate 22 is made of non-metallic material, it can avoid interference with the electromagnetic heating component, allowing the electromagnetic heating component to smoothly perform electromagnetic induction heating on the busbar and welding wire; since the protrusion 3 is set on the welding support platform, it will not interfere with the electromagnetic heating component, so its material can be arbitrarily selected.

[0089] This application provides a sufficiently detailed and specific description. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within its protection scope. The scope of protection claimed in this application is defined by the claims, not by the above descriptions in the embodiments. Without contradiction, some optional components in one embodiment can also be used in another embodiment, and some preferred structures of the same component in one embodiment are also applicable to another embodiment. Furthermore, there may be slight differences in the wording of the names of certain components in different embodiments; these slight differences will not affect the understanding of the technical solution of the present invention by those skilled in the art.

Claims

1. A busbar welding device, characterized in that, The busbar welding device is used to weld the welding wire group at the end of the battery string to the busbar. The busbar welding device includes a welding support platform and a welding head, wherein: The welding support platform is provided with a support surface for supporting the busbar; The welding head is positioned above the welding support platform. An electromagnetic heating component is installed inside the welding head. A pressing surface is provided at the bottom of the welding head. The welding head is used to press the welding wire group at the end of the battery string onto the busbar located on the welding support platform via the pressing surface, and to heat the pressed welding wire group and busbar via the electromagnetic heating component. The bottom of the welding head is provided with a protrusion, which is located on the side of the pressing surface, and the bottom of the protrusion is lower than the pressing surface; or, the welding support platform is provided with a protrusion, which is located on the side of the support surface, and the top of the protrusion is higher than the support surface. When the welding head presses the welding wire group at the end of the battery string to the busbar located on the welding support platform, the protrusion is used to bend the welding wire group located between the battery cell at the end of the battery string and the support surface downward or upward.

2. The busbar welding device as described in claim 1, characterized in that, The protrusion is a convex strip extending along a first direction, and the convex strip is used to bend all the welding wires in the welding wire group; or, the protrusion includes a plurality of protrusions arranged at intervals along the first direction, and each of the protrusions is used to bend at least one welding wire in the welding wire group. Wherein, the first direction is parallel to the length direction of the bearing surface.

3. The busbar welding device as described in claim 1 or 2, characterized in that, The welding head includes a base and a bottom plate, wherein: The base has a downward-opening mounting cavity, the electromagnetic heating assembly is disposed in the mounting cavity, the bottom plate is detachably installed at the bottom of the base and closes the mounting cavity, and the lower surface of the bottom plate constitutes the pressing surface; The protrusion is fixedly connected to the base plate, or the protrusion is integrally formed on the base plate, and the protrusion is used to bend the welding wire assembly downwards.

4. The busbar welding device as described in claim 3, characterized in that, The base plate is a non-metallic plate, and the protrusion is a non-metallic protrusion.

5. The busbar welding device as described in claim 3, characterized in that, The base has a plurality of first air inlets spaced apart along the length of the pressing surface at its bottom. The first air inlets are used to blow air toward the welding wire group located outside the bearing surface.

6. The busbar welding device as described in claim 1, characterized in that, The welding support platform includes a mounting base and a plurality of welding stations, wherein each welding station is respectively mounted on the mounting base in a vertically floating manner and is spaced apart along a first direction, the top surface of the plurality of welding stations constitutes the bearing surface, and the plurality of welding stations are used to cooperate in bearing the busbar extending along the first direction. The protrusion is mounted on the mounting base and located on one side of each welding station. The top of the protrusion is higher than the top surface of the welding station after being compressed. The protrusion is fixedly connected to or integrally formed on the mounting base. The protrusion is used to bend the welding wire assembly upward.

7. The busbar welding device as described in claim 6, characterized in that, The protrusion is a ridge extending along the first direction, and the ridge is used to bend all the welding wires in the welding wire group; or, the protrusion includes a plurality of protrusions arranged at intervals along the first direction, and each of the protrusions is used to bend at least one welding wire in the welding wire group.

8. The busbar welding device as described in claim 1, characterized in that, The welding support platform includes a mounting base and a plurality of welding stations, wherein each welding station is respectively mounted on the mounting base in a vertically floating manner and is spaced apart along a first direction, the top surface of the plurality of welding stations constitutes the bearing surface, and the plurality of welding stations are used to cooperate in bearing the busbar extending along the first direction. The protrusion is installed on the first side of each of the welding stations. The top of the protrusion is higher than the top surface of the welding station. The protrusion is fixedly connected to or integrally formed on the welding station. The protrusion is used to bend the welding wire assembly upward.

9. The busbar welding device as described in claim 8, characterized in that, The protrusion includes a protrusion that corresponds one-to-one with the welding station. Each protrusion is installed on the first side of the corresponding welding station, and each protrusion is used to bend a welding wire carried by the corresponding welding station.

10. The busbar welding apparatus according to any one of claims 6 to 9, characterized in that, Each of the welding stations is provided with a mounting groove on the mounting base. The lower end of the welding station is inserted into the corresponding mounting groove. A spring is provided between the bottom of the welding station and the bottom of the corresponding mounting groove.

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