Integrated welding device for composite current collector

Abstract

The invention relates to the technical field of welding equipment, and discloses an integrated welding device for a composite current collector, which is used for welding the composite current collector, and comprises a workbench, a support arm and a soldering aid piece arranged at the top of the workbench, a console arranged in front of the support arm, a main electrode arranged at the bottom of the console, and an adapter piece arranged at the bottom of the main electrode, and the positioning equipment is arranged at the top of the soldering-aid piece. According to the integrated welding device for the composite current collector, by arranging the positioning equipment, when the composite current collector is laid, one corner of the composite current collector can be placed in the placing opening, positioning is conducted through the placing opening, then layer-by-layer stacking is conducted, the composite current collector is pressed and fixed through the pressing assembly, and finally welding is conducted through the switching piece; in the process, the position of the composite current collector can be adjusted by moving the sliding block, so that the situation that the welding effect is affected and the product quality is reduced due to dislocation or deviation in the laying process of the composite current collector can be avoided.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an integrated welding device for composite current collectors. Background Technology

[0002] With the trend of lithium batteries developing towards higher energy density and higher safety, composite current collectors have become core key materials due to their advantages of being lightweight, thin, and having high tensile strength. Reliable welding of the current collector with the adapter is the core process of battery cell packaging. Integrated welding equipment has become the mainstream application equipment for this process because it can integrate multiple processes to achieve continuous operation.

[0003] Composite current collectors, as a core lightweight material in the lithium battery field, have a "metal-polymer-metal" sandwich structure, which places extremely high demands on the precision and strength of the welding process between the tabs and the adapter plates. Currently, for the welding of multilayer composite current collectors, the industry is gradually adopting integrated welding equipment, which integrates feeding, welding, and testing units to attempt to achieve automated mass production.

[0004] However, existing integrated welding equipment still faces significant technical bottlenecks in welding composite current collectors and adapter plates, especially in terms of positioning references and dynamic error prevention, which severely restricts the feasibility of automated docking and welding yield.

[0005] Specifically, existing devices generally lack standardized mechanical positioning reference structures. During the clamping process before welding, there are no reliable rigid positioning constraints between the composite current collector sheets, or between the composite current collector, adapter sheet, and flux sheet; stacking often relies on manual labor or simple tooling. Because the metal layer of the composite current collector is extremely thin (typically only 3-12 μm) and its overall structure is flexible, horizontal alignment deviations are very likely to occur during manual stacking, causing the welding guide on the adapter sheet to deviate from the pre-set welding area of ​​the composite current collector. This initial positioning error directly leads to problems such as incomplete welds, misaligned welds, and even edge penetration during subsequent welding.

[0006] More critically, existing devices fail to address the dynamic misalignment issue during the welding process. During the welding penetration stage, the high voltage applied by the main electrode and the thermal stress generated during welding create complex external forces acting on the stacked components. Due to the lack of an effective real-time positioning and locking mechanism, the composite current collector and the adapter plate are highly susceptible to relative slippage or torsion during the critical processes of weld nugget formation and the insertion of the drive body. This dynamic misalignment during welding can prevent the drive body from accurately piercing the polymer layer at the preset position, causing conduction failure in the metal layer, or leading to tearing and delamination of the composite current collector's metal layer due to uneven local stress. Summary of the Invention

[0007] Given that existing integrated welding devices lack standardized mechanical positioning benchmarks, the stacking of composite current collectors, adapter plates, and welding flux plates is prone to initial alignment deviations, and there is no effective real-time positioning and locking mechanism, the welding process is easily affected by external forces such as high pressure, thermal stress, and vibration, which can lead to problems such as incomplete welding, misaligned welding, and metal layer tearing and delamination. This seriously restricts the feasibility of automated docking and welding yield. Therefore, an integrated welding device for composite current collectors is proposed.

[0008] This application provides an integrated welding device for composite current collectors, the purpose of which is to: design a standardized rigid positioning reference structure to achieve precise initial positioning of the composite current collector, adapter piece and welding flux piece, and add a real-time positioning and locking mechanism during the welding process to effectively suppress dynamic misalignment caused by external forces, improve welding positioning accuracy and structural stability, ensure the consistency and reliability of welding of composite current collector and adapter piece, improve the automation docking capability of production line and overall welding yield, and meet the needs of large-scale lithium battery production.

[0009] The technical solution of the present invention is as follows: an integrated welding device for composite current collectors, used for welding composite current collectors, including a worktable, a support arm and a flux plate disposed on the top of the worktable, a control console disposed in front of the support arm, a main electrode disposed at the bottom of the control console, a transition piece disposed at the bottom of the main electrode, and a positioning device disposed on the top of the flux plate. The positioning device includes an adjustment groove opened on the top of the flux plate, sliding grooves opened on both sides of the inner wall of the adjustment groove, a sliding rod disposed between the two sliding grooves, a sliding block disposed on the outside of the sliding rod, a placement opening disposed on the top of the sliding block, and a pressing component disposed in the placement opening. The adapter piece is located directly above the flux piece, the adjustment groove is located at the right rear corner of the flux piece, the placement port is located at the left front corner of the sliding block, the composite current collector is laid on top of the flux piece, and its right rear corner is placed inside the placement port, and the pressing component is pressed on top of the composite current collector.

[0010] Furthermore, the pressing assembly includes a vertical sliding groove formed on the inner wall of the placement opening, multiple vertical sliding blocks disposed inside the placement opening, a pressure plate disposed on the outer side of the vertical sliding blocks, and magnetic sheets disposed on the surface of the vertical sliding blocks and the bottom wall of the placement opening. The pressure plate is slidably installed in the vertical groove, and multiple magnetic sheets are located on the same straight line. The vertical slider and the composite current collector are stacked alternately.

[0011] Furthermore, the pressing assembly also includes an interface opened at the right rear corner of the placement opening, a horizontal slide groove opened at the bottom wall of the interface, a translation slider disposed inside the horizontal slide groove, a control rod disposed at the top of the translation slider, and an insert disposed on the side of the control rod near the vertical slider. The translation slider extends upward into a horizontal groove, and the control rod is rotatably connected to the translation slider, with the control rod located within the interface.

[0012] Furthermore, the vertical slider has a notch corresponding to the insert on the side near the control rod.

[0013] Furthermore, a smoothing component is provided on the outside of the main electrode. The smoothing component includes a rotating groove opened on the outside of the main electrode, a pushing arm disposed inside the rotating groove, and a roller disposed at the bottom of the pushing arm. The push arm is located on the side of the adapter plate, and the lower end of the push arm extends to the bottom of the adapter plate.

[0014] Furthermore, the smoothing assembly also includes a movable slide groove opened on the outside of the main electrode, a movable slider disposed in the movable slide groove, a connecting arm disposed on the side of the movable slider away from the movable slide groove, a fixed seat disposed on the outside of the pressing arm, and a slot disposed on the side of the fixed seat away from the pressing arm. The connecting arm overlaps the outside of the push arm, and the lower end of the connecting arm is rotatably connected to the fixed seat through a slot.

[0015] Furthermore, the slots are arranged in a linear array on the outside of the fixing base, and there are no fewer than two of them.

[0016] Furthermore, the bottom end of the push arm expands outward, with an angle of not less than five degrees with the central axis of the main electrode.

[0017] Furthermore, the main electrode extends downward from the movable slide, and a limiting groove arranged in a linear array is provided at the lower opening of the movable slide, with a limiting bolt provided in one of the limiting grooves; The limiting bolt is located below the movable slider.

[0018] The beneficial effects of this invention are: 1. By setting up a positioning device, when laying the composite manifold, one corner can be placed in the placement opening for positioning. Then, layers are stacked, and a pressing component is used to press and fix it. Finally, an adapter plate is used for welding. During this process, the position of the composite manifold can be adjusted by moving the sliding block. This prevents misalignment or displacement of the composite manifold during laying, which could affect the welding effect and lead to a decrease in product quality.

[0019] 2. By setting up multiple layers of vertical sliders, when laying the composite manifold, a vertical slider slides down to press and fix it after each layer is laid. The vertical sliders are connected by magnetic adsorption. This can prevent the composite manifold laid later from affecting the composite manifold laid earlier, making the laying process more stable and the laying more neat.

[0020] 3. By setting the insert, after welding is completed, push the control rod to insert the insert into the notch, and then rotate the control rod to lift the insert and separate the vertical slider. This makes it easier to remove the welded composite current collector, making the equipment more convenient to use and improving work efficiency.

[0021] 4. By setting up a smoothing component, during welding, the main electrode pushes the adapter plate down. Before the adapter plate contacts the composite current collector, the roller contacts the composite current collector first and is pushed. The pushing arm drives the roller to open outward, smoothing the composite current collector from the center outward. This can ensure the flatness of the composite current collector during welding and improve the welding quality.

[0022] 5. By setting a connecting arm, the engagement position of the connecting arm and the slot, and the insertion position of the limit bolt and the limit slot can be changed, thus adjusting the tilt angle of the push arm, which can be applied to composite current collectors of different sizes and stacking layers. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the main electrode of the present invention; Figure 3 This is a schematic diagram of the flux sheet of the present invention; Figure 4 This is a schematic diagram of the sliding block of the present invention; Figure 5 This is a disassembled diagram of the pressing component of the present invention; Figure 6 For the present invention Figure 5 Second-person perspective; Figure 7 This is a top view of the sliding block of the present invention; Figure 8 For the present invention Figure 7 Sectional view at point AA; Figure 9 This is a schematic diagram of the smoothing component of the present invention; Figure 10 This is an exploded view of the smoothing component of the present invention; Figure 11 This is a schematic diagram of the connecting arm of the present invention.

[0024] In the picture: 1. Workbench; 2. Support arm; 3. Flux plate; 4. Control console; 5. Main electrode; 6. Adapter plate; 7. Positioning device; 71. Adjustment groove; 72. Sliding groove; 73. Sliding rod; 74. Sliding block; 75. Placement port; 76. Pressing assembly; 761. Vertical slide groove; 762. Vertical slider; 763. Pressure plate; 764. Magnetic sheet; 765. Interface; 766. Horizontal slide groove; 767. Translation slider; 768. Control rod; 769. Insert plate; 8. Smoothing assembly; 81. Rotating groove; 82. Pushing arm; 83. Roller; 84. Moving slide groove; 85. Moving slider; 86. Connecting arm; 87. Fixed base; 88. Slot; 89. Limiting groove; 810. Limiting bolt. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Example 1, referring to Figures 1-8 This is the first embodiment of the present invention, which provides an integrated welding device for welding composite current collectors. The device includes a workbench 1, a support arm 2 and a flux plate 3 disposed on the top of the workbench 1, a control console 4 disposed in front of the support arm 2, a main electrode 5 disposed at the bottom of the control console 4, a transition piece 6 disposed at the bottom of the main electrode 5, and a positioning device 7 disposed on the top of the flux plate 3. The positioning device 7 includes an adjustment groove 71 opened on the top of the flux plate 3, sliding grooves 72 opened on both sides of the inner wall of the adjustment groove 71, a sliding rod 73 disposed between the two sliding grooves 72, a sliding block 74 disposed on the outside of the sliding rod 73, a placement opening 75 disposed on the top of the sliding block 74, and a pressing component 76 disposed in the placement opening 75.

[0027] Specifically, the support arm 2 is fixed to the workbench 1 by bolts, the flux plate 3 is snapped onto the top of the workbench 1, the flux plate 3 is located in front of the support arm 2, and the top of the flux plate 3 is provided with a flux surface, the control console 4 is fixed to the support arm 2 by bolts, the main electrode 5 is fixed to the control console 4 by bolts, the adapter plate 6 is fixed to the main electrode 5 by bolts, the adapter plate 6 is located directly above the flux plate 3, the adjustment groove 71 is located at the right rear corner of the flux plate 3, the projection area of ​​the adapter plate 6 on the surface of the flux plate 3 does not intersect with the adjustment groove 71, the sliding rod 73 slides in the sliding groove 72, controlling the longitudinal movement of the sliding block 74, the sliding block 74 slides outside the sliding rod 73, which can realize the lateral movement of the sliding block 74, the bottom of the sliding block 74 is in contact with the bottom wall of the adjustment groove 71, the placement port 75 is located at the left front corner of the sliding block 74, the composite current collector is laid on top of the flux plate 3, and the right rear corner is placed in the placement port 75, and the pressing component 76 is pressed on top of the composite current collector.

[0028] The adapter plate 6 has a connecting surface A facing the main electrode 5 and a connecting surface B facing the composite current collector; the flux plate 3 has a connecting surface C facing the composite current collector and a connecting surface D facing the worktable 1. In this invention, the multilayer composite current collector is welded using the adapter plate 6 and the welding method proposed in this application. The process is simple, efficient, and produces stable quality, and is easily automated. An auxiliary electrode is provided below the flux plate 3. Both ends of the main electrode 5 and the auxiliary electrode have terminals for connecting cables to form positive and negative electrodes. Resistance adjustment grooves are provided on the outer sides of both the main electrode 5 and the auxiliary electrode to adjust their internal resistance and create localized high-heat zones.

[0029] The composite current collector has more than 10 stacked layers, and a conical drive body is provided on the connection surface B of the adapter plate 6.

[0030] By setting up the positioning device 7, when laying the composite manifold, one corner of it can be placed in the placement port 75 for positioning. Then, it is stacked layer by layer and pressed and fixed by the pressing component 76. Finally, it is welded by the adapter piece 6. During this process, the position of the composite manifold can also be adjusted by moving the sliding block 74. This can avoid misalignment or displacement during the laying of the composite manifold, which would affect the welding effect and lead to a decrease in product quality.

[0031] The pressing assembly 76 includes a vertical slide groove 761 formed in the inner wall of the placement port 75, multiple vertical sliders 762 disposed inside the placement port 75, a pressure plate 763 disposed on the outer side of the vertical sliders 762, and magnetic sheets 764 disposed on the surface of the vertical sliders 762 and the bottom wall of the placement port 75.

[0032] Specifically, there are two vertical slide grooves 761, which correspond to the two sides of the vertical slider 762 respectively, making its sliding state more stable. The vertical slider 762 is integrally formed with the vertical slider 762, and both are made of frosted ceramic material. The pressure plate 763 is slidably installed in the vertical slide groove 761. A damping plate is installed between the pressure plate 763 and the vertical slide groove 761. Multiple magnetic sheets 764 are located on the same straight line. The vertical slider 762 and the composite current collector are stacked alternately.

[0033] By setting up multiple layers of vertical sliders 762, when laying the composite current collector, each layer is laid and then a vertical slider 762 slides down to press and fix it. The vertical sliders 762 are connected by magnetic sheets 764. This can prevent the composite current collector laid later from affecting the composite current collector laid earlier, making the laying process more stable and the laying more neat.

[0034] The pressing assembly 76 also includes an interface 765 located at the right rear corner of the placement port 75, a horizontal slide groove 766 located on the bottom wall of the interface 765, a translation slider 767 located inside the horizontal slide groove 766, a control rod 768 located at the top of the translation slider 767, and an insert 769 located on the side of the control rod 768 near the vertical slider 762.

[0035] Specifically, the translation slider 767 is slidably installed in the horizontal slide groove 766 and extends upward out of the horizontal slide groove 766. The control rod 768 is rotatably connected to the translation slider 767. The control rod 768 is located in the interface 765 and a trigger is provided on the top of the control rod 768. The vertical slider 762 has a notch on the side near the control rod 768 that corresponds to the insert 769, so that the insert 769 can be inserted into the gap of the vertical slider 762.

[0036] After welding is completed by setting the insert 769, push the control rod 768 to insert the insert 769 into the notch. Then rotate the control rod 768 to lift the insert 769 and separate the vertical slider 762. This makes it easier to remove the welded composite current collector, making the equipment more convenient to use and improving work efficiency.

[0037] Example 2, refer to Figures 1-2 , Figures 9-11 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the smoothing component 8 includes a rotating groove 81 arranged in a ring array outside the main electrode 5, a pushing arm 82 disposed inside the rotating groove 81, and a roller 83 disposed at the bottom of the pushing arm 82.

[0038] Specifically, the push arm 82 is rotatably installed in the rotating groove 81. The push arm 82 is located on the side of the adapter plate 6, and the lower end of the push arm 82 extends to the bottom of the adapter plate 6. The roller 83 is rotatably connected to the push arm 82. The bottom end of the push arm 82 expands outward, and the angle between it and the central axis of the main electrode 5 is not less than five degrees. In this way, when the roller 83 contacts the composite current collector, the push arm 82 always rotates outward.

[0039] By setting the smoothing component 8, during welding, the main electrode 5 pushes the adapter plate 6 down. Before the adapter plate 6 contacts the composite current collector, the roller 83 contacts the composite current collector first and is pushed. The pushing arm 82 drives the roller 83 to open outward and smooth the composite current collector from the center outward. This can ensure the flatness of the composite current collector during welding and improve the welding quality.

[0040] A smoothing component 8 is provided on the outside of the main electrode 5. The smoothing component 8 also includes a movable slide groove 84 opened on the outside of the main electrode 5, a movable slider 85 disposed in the movable slide groove 84, a connecting arm 86 disposed on the side of the movable slider 85 away from the movable slide groove 84, a fixed seat 87 disposed on the outside of the pressing arm 82, and a slot 88 disposed on the side of the fixed seat 87 away from the pressing arm 82.

[0041] Specifically, the movable slide 84 is correspondingly provided with the rotating slide 81, the movable slider 85 is slidably installed in the movable slide 84, the connecting arm 86 overlaps the outside of the pushing arm 82, the upper end of the connecting arm 86 is rotatably connected to the movable slider 85, and the lower end of the connecting arm 86 is rotatably connected to the fixed seat 87 through the slot 88. The fixed seat 87 is welded to the pushing arm 82. The slots 88 are linearly arrayed on the outside of the fixed seat 87, and there are no fewer than two of them.

[0042] The main electrode 5 extends downward from the movable slide 84. Limiting grooves 89 arranged in a linear array are provided at the lower opening of the movable slide 84, and a limiting bolt 810 is provided in one of the limiting grooves 89.

[0043] Specifically, the limit bolt 810 is located below the movable slider 85 and is inserted into the limit groove 89 to control the downward position of the movable slider 85.

[0044] By setting the connecting arm 86, the engagement position of the connecting arm 86 and the slot 88, and the insertion position of the limit bolt 810 and the limit slot 89 can be changed, thereby adjusting the tilt angle of the push arm 82, which can be applied to composite current collectors of different sizes and stacking layers.

[0045] The remaining structure is the same as that in Example 1.

[0046] Based on embodiments 1-2, the working principle of the integrated welding device for composite current collectors of the present invention is as follows: Before welding, push all the vertical sliders 762 above the placement opening 75 and keep them at a certain distance. Then, lay the first layer of composite current collector on top of the flux sheet 3 and place one corner of the composite current collector into the placement opening 75 to align its corners. Then slide down another vertical slider 762 until the magnetic sheet 764 on the vertical slider 762 is attracted to the magnetic sheet 764 on the bottom wall of the placement opening 75. The vertical slider 762 will then firmly press the composite current collector. In this way, the composite current collector is laid layer by layer.

[0047] During welding, the control console 4 lowers the main electrode 5 and the adapter plate 6. Before the adapter plate 6 contacts the composite current collector, the roller 83 contacts the composite current collector and is pushed. The pushing arm 82 drives the roller 83 to open outward and smooth the composite current collector from the center outward. The connecting arm 86 pushes the moving slider 85 upward. Then the adapter plate 6 contacts the composite current collector and the outer side is welded.

[0048] After welding is completed, push the control lever 768 along the horizontal slide groove 766 toward the vertical slider 762, so that the insert 769 is inserted into the notch between the vertical sliders 762. Then press the trigger to rotate the control lever 768 away from the vertical slider 762, so that one end of the insert 769 is lifted up, raising the vertical slider 762 upwards. The fixing between the vertical sliders 762 is loosened, and the welded composite current collector is extracted.

[0049] Example 3, referring to Figures 1-11 The third embodiment of the present invention provides a welding method for connecting a composite current collector and an adapter plate, comprising the following steps: S1. Stack the composite current collectors to be soldered together and place them between the adapter plate 6 and the flux plate 3, so that the tip of the drive body on the adapter plate 6 is facing down; align the main electrode 5 with the center of the drive body.

[0050] S2. Start the device. The main electrode 5 and the auxiliary electrode close and apply pressure, causing the tip of the drive body to penetrate the current collector.

[0051] S3. When the terminal of the auxiliary electrode is energized, a circuit is formed with the auxiliary electrode. Because the auxiliary electrode itself has a large resistance, the auxiliary electrode generates resistance heat, which is transferred to the flux 3 and then conducted to the composite current collector, causing the organic matter inside the composite current collector to melt.

[0052] S4. When the terminal of the main electrode 5 is energized, a circuit is formed with the main electrode 5. Because the main electrode 5 has a large resistance, the main electrode 5 generates resistance heat, which is transferred to the adapter plate 6 and the driving body on the surface, and then conducted to the composite current collector, causing the organic matter inside the composite current collector to melt. Under the action of high temperature and pressure, the organic matter layer is squeezed open by the driving body and punctures the composite current collector.

[0053] S5, the switching circuit, switches all the terminals at both ends of the main electrode 5 to positive and all the terminals at both ends of the auxiliary electrode to negative.

[0054] S6. Under the combined action of heat and force, a diffusion connection is formed between the copper foils of the composite current collectors in each layer around the drive body; and a molten nugget is formed between the tip of the drive body on the adapter plate 6 and the flux plate 3.

[0055] S7. Disconnect the current and remove the main electrode 5. Welding is complete.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An integrated welding device for welding composite current collectors, comprising a worktable (1), a support arm (2) and a welding flux plate (3) disposed on the top of the worktable (1), a control console (4) disposed in front of the support arm (2), a main electrode (5) disposed at the bottom of the control console (4), and a transfer plate (6) disposed at the bottom of the main electrode (5), characterized in that: It also includes a positioning device (7) set on the top of the flux sheet (3). The positioning device (7) includes an adjustment groove (71) opened on the top of the flux sheet (3), a sliding groove (72) opened on both sides of the inner wall of the adjustment groove (71), a sliding rod (73) set between the two sliding grooves (72), a sliding block (74) set on the outside of the sliding rod (73), a placement port (75) set on the top of the sliding block (74), and a pressing component (76) set in the placement port (75). The adapter plate (6) is located directly above the flux plate (3), the adjustment groove (71) is located at the right rear corner of the flux plate (3), the placement port (75) is located at the left front corner of the sliding block (74), the composite current collector is laid on top of the flux plate (3), and the right rear corner is placed inside the placement port (75), and the pressing component (76) is pressed on top of the composite current collector.

2. The integrated welding device for composite current collectors according to claim 1, characterized in that: The pressing assembly (76) includes a vertical groove (761) opened on the inner wall of the placement port (75), multiple vertical sliders (762) disposed inside the placement port (75), a pressure plate (763) disposed on the outer side of the vertical sliders (762), and magnetic sheets (764) disposed on the surface of the vertical sliders (762) and the bottom wall of the placement port (75). The pressure plate (763) is slidably installed in the vertical slide groove (761), and multiple magnetic sheets (764) are located on the same straight line. The vertical slider (762) and the composite current collector are stacked alternately.

3. The integrated welding device for composite current collectors according to claim 2, characterized in that: The pressing assembly (76) also includes an interface (765) opened at the right rear corner of the placement port (75), a horizontal slide groove (766) opened at the bottom wall of the interface (765), a translation slider (767) set inside the horizontal slide groove (766), a control rod (768) set at the top of the translation slider (767), and an insert (769) set on the side of the control rod (768) near the vertical slider (762). The translation slider (767) extends upward into a horizontal groove (766), and the control rod (768) is rotatably connected to the translation slider (767). The control rod (768) is located inside the interface (765).

4. The integrated welding device for composite current collectors according to claim 3, characterized in that: The vertical slider (762) has a notch on the side near the control rod (768) that corresponds to the insert (769).

5. The integrated welding device for composite current collectors according to claim 1, characterized in that: A smoothing component (8) is provided on the outside of the main electrode (5). The smoothing component (8) includes a rotating groove (81) opened on the outside of the main electrode (5), a pushing arm (82) disposed inside the rotating groove (81), and a roller (83) disposed at the bottom of the pushing arm (82). The push arm (82) is located on the side of the adapter plate (6), and the lower end of the push arm (82) extends to the bottom of the adapter plate (6).

6. The integrated welding device for composite current collectors according to claim 5, characterized in that: The smoothing component (8) also includes a movable slide groove (84) opened on the outside of the main electrode (5), a movable slider (85) disposed in the movable slide groove (84), a connecting arm (86) disposed on the side of the movable slider (85) away from the movable slide groove (84), a fixed seat (87) disposed on the outside of the pushing arm (82), and a slot (88) disposed on the side of the fixed seat (87) away from the pushing arm (82). The connecting arm (86) overlaps the outside of the pushing arm (82), and the lower end of the connecting arm (86) is rotatably connected to the fixed seat (87) through the slot (88).

7. The integrated welding device for composite current collectors according to claim 6, characterized in that: The card slots (88) are arranged in a linear array on the outside of the fixing base (87), and there are no fewer than two of them.

8. The integrated welding device for composite current collectors according to claim 6, characterized in that: The bottom end of the push arm (82) expands outward, and the angle between it and the central axis of the main electrode (5) is not less than five degrees.

9. The integrated welding device for composite current collectors according to claim 6, characterized in that: The movable slide (84) extends downward to the main electrode (5), and a limiting groove (89) arranged in a linear array is provided at the opening below the movable slide (84), and a limiting bolt (810) is provided in one of the limiting grooves (89). The limiting bolt (810) is located below the movable slider (85).

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