A welding device for lithium battery module busbars

Abstract

The present application relates to lithium battery production welding equipment technical field, especially to a kind of welding device for lithium battery module busbar, including welding head, and its welding end is towards the part to be welded;Anti-splashing component includes the anti-splashing cover of cover in the part to be welded outside;Metal adsorption component is located in anti-splashing cover, metal adsorption component is inverted bowl-shaped structure, metal adsorption component cover is located in the part to be welded outside;Temperature generating portion is located on metal adsorption component, and the temperature generating end of temperature generating portion is towards bowl-shaped structure;Temperature sensor is located in the inside of bowl-shaped structure;The present application is by being provided with anti-splashing cover and bowl-shaped metal adsorption component, effectively adsorbs and blocks the metal liquid drop splashed in welding process, prevents its pollution battery module inside.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology for lithium battery production, and in particular to a welding device for lithium battery module busbars. Background Technology

[0002] Lithium polymer batteries typically consist of several identical parallel sub-cells to increase the discharge current, or several battery packs connected in series to increase the usable voltage. Although lithium polymer batteries are often simply referred to as lithium batteries or lithium-ion batteries, they are not strictly speaking the same thing.

[0003] In related technologies, Chinese utility model patent with authorization announcement number CN206250266U discloses a lithium battery bus structure, which includes a lithium battery frame, ten battery cells installed in the lithium battery frame, the ten battery cells are arranged in sequence along the horizontal direction and abut against each other, a positive battery terminal is welded to one end of the battery cell, and a negative battery terminal is welded to the other end of the battery cell.

[0004] The lithium battery frame has a top cover, on which are provided metal connecting pieces that connect adjacent cells. The top cover also has a busbar through-hole, within which the metal connecting pieces are nested. Metal connectors are soldered to both ends of the metal connecting pieces, and brazing filler metal is located below each connector. One end of the metal connector is soldered to the positive terminal of one of the cells via the brazing filler metal, while the other end is soldered to the negative terminal of an adjacent cell via the brazing filler metal. The ten cells are connected into a single circuit according to electrical principles.

[0005] When installing a lithium polymer battery, ten cells are installed sequentially into the lithium battery frame. The metal connecting piece is then installed on the top cover, which is then placed over the lithium battery frame. The laser head on the laser welding machine welds the metal connector on the metal connecting piece to the positive or negative battery terminal, thus completing the installation of the lithium polymer battery.

[0006] Regarding the aforementioned technologies, laser welding of lithium battery module busbars typically employs a focused laser spot with a Gaussian energy distribution. This structure results in extremely high energy density and temperatures far exceeding the metal boiling point in the center region of the weld joint, triggering violent vaporization and generating an upward vapor backflow force. Conversely, the edge region suffers from insufficient energy and lower temperatures, creating a steep temperature gradient and surface tension difference, driving intense convection in the molten pool. This extreme temperature imbalance between the center and edge causes the molten pool to become unstable. In the overheated center, molten metal droplets are "exploded" by vaporization pressure, while in the low-temperature edge region, rapid solidification of the molten pool leads to gas stagnation, ultimately forming pores inside the weld or causing secondary spatter due to sudden gas escape. The spatter radius can reach 50–80 cm, severely contaminating the interior of the battery module. To address these issues, this invention proposes a welding device for lithium battery module busbars. Summary of the Invention

[0007] To achieve the above objectives, the present invention provides a welding apparatus for a lithium battery module busbar, comprising: The welding head, with its welding end facing the part to be welded; An anti-splash component is disposed between the welding head and the part to be welded. The anti-splash component includes an anti-splash cover covering the part to be welded. The top plate of the anti-splash cover is provided with a welding hole for the welding head to perform welding operations. A metal adsorption component is disposed inside the anti-splash cover. The metal adsorption component has an inverted bowl-shaped structure. The metal adsorption component covers the part to be welded to adsorb splashed metal droplets. The end of the metal adsorption component away from the opening is provided with a connecting hole that communicates with the welding hole. A temperature regulating section is provided on the metal adsorption component, with the temperature generating end of the temperature regulating section facing the inside of the bowl-shaped structure, so as to balance the temperature of the central overheated area and the edge low-temperature area of ​​the part to be welded by raising the temperature inside the bowl-shaped structure. A temperature sensor is located on the inner side of the bowl-shaped structure, with the temperature measuring end of the temperature sensor facing the part to be welded.

[0008] Optionally, the metal adsorption component includes: The number of first electrodes is set to be several; The second electrode is provided in a plurality of them, and the plurality of second electrodes and the plurality of first electrodes are alternately connected in a bowl-shaped structure. The first electrode and the second electrode are arranged opposite to each other. When energized, a magnetic field is generated between the opposing second electrode and the first electrode to attract splashed metal droplets to adhere to the first electrode or the second electrode by magnetic force.

[0009] Optionally, the temperature-regulating part is a ring structure, and the number of such ring-shaped temperature-regulating parts is set to a plurality of them. The plurality of temperature-regulating parts are arranged along the axial direction of the metal adsorption member, and the diameter of the metal adsorption member increases sequentially from the welding hole to the part to be welded in the axial direction.

[0010] Optionally, the temperature-regulating part is a block structure, and the number of temperature-regulating parts is set to several. The several temperature-regulating parts form multiple ring structures in the circumferential direction of the metal adsorption component, and the multiple ring structures are arranged along the axial direction of the metal adsorption component. The diameter of the ring structure increases gradually from the welding hole to the part to be welded in the axial direction of the metal adsorption component.

[0011] Optionally, it also includes a cleaning component disposed within the splash guard, the cleaning component comprising: A permanent magnet rotor is movably disposed within a rotating groove, which is located on the inner side of the bowl-shaped structure and has an annular structure. A permanent magnet coil is disposed on the outside of the bowl-shaped structure, and the permanent magnet coil is radially wrapped around the permanent magnet rotor. A connecting rod is located inside the bowl-shaped structure and connected to the permanent magnet rotor. The connecting rod abuts against the inner wall of the bowl-shaped structure.

[0012] Optionally, the cleaning component further includes: A cleaning plate is disposed on the connecting rod, and the end of the cleaning plate away from the connecting rod abuts against the temperature-regulating part, wherein the number of cleaning plates matches the number of temperature-regulating parts.

[0013] Optional, also includes: A first drive rod is disposed on the welding head; A first driver, the driving end of which is connected to the end of the first driving rod away from the welding head; A mounting base is connected to the first driver and is attached to the housing of the welding device.

[0014] Optionally, it also includes a connecting portion for connecting the first drive rod and the splash guard, the connecting portion comprising: A fixing rod is provided on the first drive rod; The support is connected to the fixing rod; A telescopic assembly is provided on the support, and one end of the telescopic assembly away from the support is connected to the splash guard.

[0015] Optionally, the metal adsorption component is movably disposed within the splash guard, and the welding device for the lithium battery module busbar further includes a driving component, the driving component comprising: The second actuator is located on the splash guard; The second drive rod is located on the drive end of the second driver. The second drive rod is movably inserted into the top plate of the splash shield. The end of the second drive rod away from the second driver is connected to the metal adsorption component.

[0016] Optionally, it also includes a sealing member disposed between the inner top wall of the splash shield and the metal adsorption member, the sealing member comprising: A sealing ring is disposed on the metal adsorption component. The central axis of the sealing ring coincides with the central axis of the cavity of the welding hole. The sealing ring is movably disposed in the sealing groove, which is disposed on the anti-splash cover, and the cavity of the sealing groove has a ring-shaped structure.

[0017] The beneficial effects of this invention are as follows: This invention effectively adsorbs and blocks molten metal droplets splashed during welding by setting up an anti-splatter cover and a bowl-shaped metal adsorption component, preventing them from contaminating the inside of the battery module. At the same time, the temperature control unit actively raises the temperature at the edge of the welding area, and with the real-time monitoring of the temperature sensor, it balances the temperature gradient between the overheated area at the center of the weld and the low-temperature area at the edge, thereby suppressing the problems of molten metal droplet splashing and gas retention caused by molten pool instability, and significantly improving welding quality and battery safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the welding device for lithium battery module busbars of the present invention; Figure 2 This invention relates to a welding device for lithium battery module busbars. Figure 1 A partial cross-sectional view of a structural schematic diagram of one embodiment; Figure 3 This invention relates to a welding device for lithium battery module busbars. Figure 2 Schematic diagram of a partial three-dimensional structure; Figure 4 This invention relates to a welding device for lithium battery module busbars. Figure 2 Enlarged schematic diagram of structure A in the middle; Figure 5 This invention relates to a welding device for lithium battery module busbars. Figure 2 Another embodiment of the structural schematic diagram; Figure 6 This invention relates to a welding device for lithium battery module busbars. Figure 5 Enlarged schematic diagram of the B-structure.

[0019] Explanation of reference numerals in the attached figures 1. Welding head; 2. Anti-splash component; 21. Anti-splash cover; 22. Welding hole; 3. Metal adsorption component; 31. First electrode; 32. Second electrode; 4. Temperature control section; 5. Cleaning component; 51. Permanent magnet rotor; 52. Rotating groove; 53. Permanent magnet coil; 54. Connecting rod; 55. Cleaning plate; 6. First drive rod; 7. First driver; 8. Fixing base; 9. Connecting part; 91. Fixing rod; 92. Support base; 93. Telescopic assembly; 931. Telescopic rod; 932. Telescopic cylinder; 933. Telescopic spring; 10. Temperature sensor; 11. Drive component; 111. Second driver; 112. Second drive rod; 12. Sealing component; 121. Sealing ring; 122. Sealing groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0021] To address the problems existing in the prior art, embodiments of the present invention provide a welding device for lithium battery module busbars, such as... Figure 1 and Figure 2 As shown, the assembly includes a welding head 1 with its welding end facing the part to be welded, an anti-spatter component 2, a metal adsorption component 3, a temperature control unit 4, and a temperature sensor 10. This embodiment fundamentally solves the problem of molten pool instability during laser welding of busbars through multi-level synergistic action: the anti-spatter cover 21 and the bowl-shaped metal adsorption component 3 form a physical barrier, effectively capturing molten metal droplets with a radius of 50-80cm, preventing internal contamination of the battery module; the temperature control unit 4 actively raises the temperature of the welding edge area, and with the real-time monitoring feedback from the temperature sensor 10, accurately balances the steep temperature gradient between the overheated area at the center of the weld and the low-temperature area at the edge, suppressing the violent molten pool convection driven by the surface tension difference; this design combines passive protection with active thermal management, avoiding the "explosion" of droplets caused by the central vaporization pressure, and preventing gas retention and porosity defects caused by rapid solidification at the edge, thereby simultaneously achieving spatter suppression and weld quality improvement, significantly enhancing the safety and reliability of lithium batteries.

[0022] In one embodiment, such as Figure 1 and Figure 2As shown, the anti-spatter component 2 is disposed between the welding head 1 and the part to be welded. The anti-spatter component 2 includes an anti-spatter cover 21 covering the part to be welded. The top plate of the anti-spatter cover 21 is provided with a welding hole 22 for the welding head 1 to perform welding operations. In this embodiment, the anti-spatter cover 21 is arranged between the welding head 1 and the part to be welded, and a welding hole 22 is opened on its top plate. This forms a physical barrier covering the area to be welded, effectively intercepting splashed metal droplets with a radius of 50-80cm, preventing them from contaminating the inside of the battery module. At the same time, the welding hole 22 ensures unobstructed laser beam incidence, achieving compatibility between protective function and welding operability. Meanwhile, this cover structure provides installation space and a closed environment for the internally integrated metal adsorption component 3, temperature control unit 4, etc., so that multiple functions can work together. Thus, without affecting welding accessibility, the problem of spatter diffusion caused by molten pool instability is controlled from the root.

[0023] In one embodiment, such as Figure 2 As shown, the metal adsorption component 3 is disposed inside the anti-spatter cover 21. The metal adsorption component 3 has an inverted bowl-shaped structure and covers the part to be welded to adsorb splashed metal droplets. The end of the metal adsorption component 3 away from the opening is provided with a connecting hole that communicates with the welding hole 22. This embodiment, by designing the metal adsorption component 3 as an inverted bowl-shaped structure and covering the part to be welded, can form a local sealed capture space around the welding point, so that the splashed metal droplets are immediately confined within the bowl-shaped space after they are generated, which greatly improves the adsorption efficiency and reliability. At the same time, the connecting hole at the end of the bowl-shaped structure away from the opening ensures that the laser or welding torch of the welding head 1 can pass through unobstructed and be aimed at the welding part, realizing a seamless combination of spatter protection and efficient welding operation.

[0024] In one embodiment, such as Figure 2 As shown, the temperature-regulating part 4 is disposed on the metal adsorption component 3, and the temperature generating end of the temperature-regulating part 4 faces the inside of the bowl-shaped structure, so as to balance the temperature of the central overheated area and the edge low-temperature area of ​​the part to be welded by raising the temperature inside the bowl-shaped structure. In this embodiment, the temperature-regulating part 4 is directly integrated on the metal adsorption component 3 and its temperature output faces the inside of the bowl-shaped structure. It can actively and accurately provide auxiliary heating to the edge of the welding area, thereby effectively raising the temperature of the edge low-temperature area, reducing the huge temperature difference between it and the central overheated area, balancing the temperature field of the entire molten pool from the source, suppressing the violent convection and surface tension difference of the molten pool caused by the temperature gradient, and thus significantly reducing the spatter caused by metal vapor explosion and the porosity formed by gas retention, ultimately improving the stability and reliability of the welding quality.

[0025] In one embodiment, the temperature-regulating part 4 can be made of high-emissivity high-temperature resistant ceramic or a metal alloy with a ceramic coating. The high-emissivity high-temperature resistant ceramic or ceramic coating can efficiently and uniformly project the heat generated by the temperature-regulating part 4 into the welding area within the bowl-shaped structure in the form of far-infrared radiation. This radiative heating method is non-contact, pollution-free, and can rapidly increase the local ambient temperature. Simultaneously, the excellent high-temperature resistance and insulation properties of the selected material ensure its reliability and stability during long-term operation under welding spatter and high-temperature environments, thus sustainably and effectively playing its key role in balancing the temperature field of the welding area.

[0026] In one embodiment, such as Figure 2 As shown, the temperature sensor 10 is located inside the bowl-shaped structure, with its measuring end facing the area to be welded. This embodiment directly mounts the temperature sensor 10 inside the bowl-shaped structure and precisely positions its measuring end towards the area to be welded. This allows for real-time, close-range monitoring of the actual temperature changes in the molten pool and its surrounding area during welding. This provides precise feedback signals for the power output of the temperature control unit 4, thereby achieving closed-loop intelligent control of the entire welding temperature field. This ensures that the temperature difference between the center and edge areas is dynamically maintained within the optimal range, fundamentally improving the accuracy and response speed of temperature balance and guaranteeing the stability of welding quality.

[0027] In one embodiment, the number of temperature sensors 10 can be multiple, and they are evenly distributed along the circumference of the bowl-shaped structure. The advantage of this arrangement is that by arranging multiple temperature sensors 10, temperature data from multiple points around the welding area can be collected simultaneously from different angles, thereby constructing a more comprehensive and three-dimensional temperature field distribution model, effectively avoiding misjudgments caused by the one-sidedness of data from a single measuring point. This not only greatly improves the accuracy and reliability of temperature monitoring, but also provides a data basis for the temperature control unit 4 to perform more refined zoned temperature control, ultimately achieving a more accurate balance of the temperature gradient in the welding heat-affected zone.

[0028] In one embodiment, the temperature sensor 10 can be a non-contact infrared temperature sensor or a laser thermometer. The non-contact temperature measurement method avoids direct contact with the high-temperature molten pool or spatter, which not only prevents the sensor from being damaged by high temperature, but also eliminates the interference that contact temperature measurement may cause to the welding process. At the same time, infrared or laser temperature measurement can achieve a rapid response at the millisecond level, accurately capturing the instantaneous dynamic changes in the temperature of the molten pool during the welding process, providing highly timely data support for the real-time and precise control of the temperature control unit 4, thereby ensuring the sensitivity and accuracy of temperature balance control.

[0029] In one embodiment, such as Figure 2 and Figure 3As shown, the metal adsorption component 3 includes: a plurality of first electrodes 31; a plurality of second electrodes 32, wherein the plurality of second electrodes 32 and the plurality of first electrodes 31 are alternately connected and form a bowl-shaped structure, wherein the first electrodes 31 and the second electrodes 32 are arranged opposite to each other, and when energized, a magnetic field is generated between the opposing second electrodes 32 and the first electrodes 31, so as to attract splashed metal droplets to adhere to the first electrodes 31 or the second electrodes 32 by magnetic force.

[0030] This embodiment connects and arranges several first electrodes 31 and second electrodes 32 alternately in a bowl-shaped structure, so that a strong magnetic field with uniform distribution and alternating direction can be generated in the internal space of the component after energization. When the hot splashed metal droplets (which are good conductors) pass through the magnetic field, eddy currents will be generated due to electromagnetic induction, and then they will be subjected to a strong magnetic force (Lorentz force). They will be actively and efficiently adsorbed and firmly attached to the electrode surface, realizing active magnetic capture of the splashes, greatly improving the adsorption efficiency and reliability, and effectively preventing the droplets from bouncing or scattering again.

[0031] Specifically, when the alternating first electrode 31 and second electrode 32 are energized, an alternating magnetic field is formed between the opposing electrodes. When the hot-temperature splashed metal droplets pass through this magnetic field as good conductors, eddy currents are induced inside. The interaction between the eddy currents and the magnetic field generates a Lorentz force, which is always perpendicular to the direction of droplet movement and points towards the electrode surface. This achieves active deflection and adsorption control of the droplet's trajectory, forcing it to be adsorbed and attached to the electrode, thus achieving the purpose of efficiently capturing the splashed material.

[0032] In one embodiment, the number of the first electrode 31 and the second electrode 32 can be specifically 4 to 8 pairs, and they are evenly and alternately arranged along the circumference of the bowl-shaped structure. The 4 to 8 pairs of electrodes can form a uniformly distributed annular magnetic field region with moderate magnetic field strength inside the bowl-shaped structure. This ensures effective adsorption of splashed metal droplets from all directions, covering all areas without dead zones, while avoiding the structural complexity and high energy consumption problems caused by an insufficient number of electrode pairs leading to uneven magnetic field or an excessive number of pairs. Thus, an optimal balance is achieved between adsorption efficiency, manufacturing cost, and operational reliability.

[0033] In one embodiment, such as Figure 2 As shown, the temperature regulating part 4 has a circular structure, and there are several such circular temperature regulating parts 4. These several temperature regulating parts 4 are arranged along the axial direction of the metal adsorption member 3, and the diameter of the metal adsorption member 3 increases sequentially from the welding hole 22 toward the part to be welded in the axial direction.

[0034] This embodiment, by arranging multiple annular heating sections 4 with progressively increasing diameters along the axial direction of the metal adsorption component 3, can construct a gradient heating ring that matches the inner contour of the bowl-shaped structure from top to bottom. This allows for synchronous and targeted radiative heating of different parts of the welding area from near to far (from the center to the edge), effectively compensating for edge heat loss caused by the Gaussian distribution of laser energy. It achieves uniform and precise temperature field control over the entire molten pool area, especially the low-temperature edge zone, thereby suppressing molten pool instability and spatter caused by temperature gradients at the source.

[0035] In one embodiment, the temperature-regulating part 4 is a block structure, and the number of temperature-regulating parts 4 is set to several. The several temperature-regulating parts 4 form multiple ring structures in the circumferential direction of the metal adsorption member 3, and the multiple ring structures are arranged along the axial direction of the metal adsorption member 3. The diameter of the metal adsorption member 3 increases gradually from the welding hole 22 to the part to be welded in the axial direction of the metal adsorption member 3.

[0036] This embodiment uses discrete block structures combined into a ring shape. Compared with the integral circular ring structure, its arrangement is more flexible and facilitates non-uniform arrangement according to the actual heat field distribution inside the bowl-shaped structure, so as to achieve precise heat compensation for specific high-temperature or low-temperature areas. At the same time, the block structure increases the heat dissipation surface area, improves heating efficiency and uniformity, and the multi-layered layout with increasing diameter can also form a gradient temperature field, accurately matching the contour of the welding area, thereby more flexibly and efficiently balancing the temperature difference between the center and the edge and suppressing spatter.

[0037] In one embodiment, such as Figure 2 and Figure 4 As shown, the welding device for the lithium battery module busbar also includes a cleaning component 5 disposed within the anti-splash cover 21. The cleaning component 5 includes: a permanent magnet rotor 51, movably disposed within a rotating groove 52, the rotating groove 52 being disposed on the inner side of the bowl-shaped structure and having an annular structure; a permanent magnet coil 53, disposed on the outer side of the bowl-shaped structure, the permanent magnet coil 53 covering the permanent magnet rotor 51 radially around the bowl-shaped structure; and a connecting rod 54, located inside the bowl-shaped structure and connected to the permanent magnet rotor 51, the connecting rod 54 abutting against the inner wall of the bowl-shaped structure.

[0038] In this embodiment, the outer permanent magnet coil 53 drives the inner permanent magnet rotor 51 to rotate in the annular rotating groove 52, which in turn drives the connecting rod 54 to move circumferentially along the inner wall of the bowl-shaped structure. This allows the connecting rod 54 to automatically scrape off the splash residue adhering to the inner wall of the metal adsorption component 3, achieving self-cleaning of the adsorption component and preventing the accumulation of splashes from affecting its adsorption efficiency, temperature uniformity, and subsequent welding quality, thus ensuring the long-term stable operation of the device.

[0039] Specifically, the cleaning process is carried out after the welding process. After the welding is completed, the control system starts the permanent magnet coil 53, drives the permanent magnet rotor 51 to drive the connecting rod 54 to rotate along the inner wall of the bowl-shaped structure, scrapes away the metal spatter residues adsorbed and accumulated during the welding process from the inner wall, and makes them fall into the bottom collection area or be discharged directly, thereby ensuring that the inner wall of the metal adsorption component 3 is always kept clean, providing a clean and efficient working environment for the next welding operation, ensuring the continuous stability of welding quality and the long-term reliable operation of the equipment.

[0040] In one embodiment, such as Figure 4 As shown, the cleaning component 5 further includes a cleaning plate 55, disposed on the connecting rod 54. One end of the cleaning plate 55, away from the connecting rod 54, abuts against the temperature-regulating part 4. The number of cleaning plates 55 matches the number of temperature-regulating parts 4. This embodiment, by providing cleaning plates 55 on the connecting rod 54 in a manner matching the number of temperature-regulating parts 4, and ensuring their ends abut against the surface of the temperature-regulating part 4, can simultaneously and effectively scrape the surface of the multi-layered temperature-regulating part 4 while the permanent magnet rotor 51 drives the connecting rod 54 to rotate. This removes metal dust or oxides that may adhere due to high temperatures and splashing environments, preventing the accumulation of contaminants from affecting the heating efficiency and temperature uniformity of the temperature-regulating part 4. This ensures that the temperature-regulating part 4 can persistently and stably play its crucial role in precisely controlling the temperature field of the welding area.

[0041] In one embodiment, such as Figure 1 As shown, the welding device for the lithium battery module busbar further includes: a first drive rod 6, disposed on the welding head 1; a first driver 7, the drive end of which is connected to the end of the first drive rod 6 away from the welding head 1; and a fixed base 8, connected to the first driver 7, which is connected to the housing of the welding device. In this embodiment, the first driver 7 drives the first drive rod 6, enabling precise control of the vertical feed movement of the welding head 1, allowing it to stably align with the part to be welded during welding and quickly lift when not in operation. The fixed base 8 provides a stable support foundation for the entire drive mechanism, ensuring the positioning accuracy and operational stability of the welding head 1 during operation, thereby improving the automation and reliability of the welding operation.

[0042] In one embodiment, the first driver 7 can be a servo motor, stepper motor, linear motor, or cylinder. Servo motors, stepper motors, linear motors, or cylinders enable high-precision digital position and pressure control, meeting the stringent requirements of welding processes for downward stroke and stability. Cylinders, on the other hand, provide a simple, low-cost, and rapidly actuated solution, suitable for applications where control precision requirements are relatively low but efficiency and reliability are paramount. This diverse selection of drivers allows the welding device to flexibly adapt to the actual application needs of different production scales, automation levels, and cost budgets.

[0043] In one embodiment, such as Figure 1 As shown, the welding device for the lithium battery module busbar further includes a connecting part 9 for connecting the first drive rod 6 and the anti-splash cover 21. The connecting part 9 includes: a fixing rod 91, disposed on the first drive rod 6; a support 92, connected to the fixing rod 91; and a telescopic component 93, disposed on the support 92, with one end of the telescopic component 93 away from the support 92 connected to the anti-splash cover 21. In this embodiment, the anti-splash cover 21 and the first drive rod 6 are linked through the connecting part 9, so that the welding head 1 and the anti-splash cover 21 can be raised and lowered synchronously, ensuring that the anti-splash cover 21 can always be stably covered around the area to be welded during the welding operation. The telescopic component 93 provides the necessary longitudinal buffer and floating compensation capabilities, which can ensure that the anti-splash cover 21 maintains flexible contact with the workpiece surface to avoid rigid collision damage, and can also adapt to slight unevenness of the workpiece surface, thereby improving the adaptability and reliability of the entire device while achieving effective protection.

[0044] In one embodiment, such as Figure 1 As shown, the telescopic assembly 93 includes a telescopic cylinder 932 fixedly mounted on the support 92. A telescopic rod 931 is movably inserted into the telescopic cylinder 932. One end of the telescopic rod 931 located outside the telescopic cylinder 932 is connected to the splash guard 21. A telescopic spring 933 is wound around the telescopic rod 931. The two ends of the telescopic spring 933 are respectively fixedly connected to the side wall of the telescopic rod 931 and the outer side wall of the telescopic cylinder 932.

[0045] This embodiment, through the insertion and cooperation of the telescopic rod 931 and the telescopic cylinder 932, and the elastic support of the telescopic spring 933, constitutes a simple and reliable passive floating mechanism. This allows the splash shield 21 to adaptively buffer itself according to the terrain undulations when it comes into contact with the workpiece surface, avoiding rigid impact. The preload of the spring can ensure that the splash shield 21 remains stably attached to the workpiece surface to maintain airtightness, and can also provide sufficient restoring force when the welding head 1 is lifted. Thus, while ensuring effective protection, it improves the equipment's tolerance to deviations in the flatness of the workpiece surface.

[0046] In one embodiment, such as Figure 5 As shown, the metal adsorption component 3 is movably disposed within the splash shield 21. The welding device for the lithium battery module busbar also includes a driving component 11, which includes: a second driver 111 disposed on the splash shield 21; and a second driving rod 112 disposed on the driving end of the second driver 111. The second driving rod 112 is movably inserted into the top plate of the splash shield 21, and one end of the second driving rod 112 away from the second driver 111 is connected to the metal adsorption component 3.

[0047] This embodiment independently controls the lifting and lowering of the metal adsorption component 3 by driving component 11, so that it can be flexibly adjusted in position according to the specific height of different welding stations or the needs of different stages in the welding process. For example, it can be lowered before welding to get closer to the workpiece to enhance the sealing and adsorption effect, or raised after welding to facilitate cleaning and maintenance, thereby significantly improving the adaptability of the device to battery modules of different specifications and the flexibility and intelligence level of the overall process operation.

[0048] Specifically, the lower sidewalls of the first electrode 31 and the second electrode 32 are both in contact with the inner sidewall of the splash shield 21. By ensuring that the lower sidewalls of both the first electrode 31 and the second electrode 32 are in contact with the inner sidewall of the splash shield 21, the installation stability of the metal adsorption component 3 within the splash shield 21 can be effectively enhanced, preventing it from shaking when impacted by splashing droplets or when the cleaning component 5 is in operation. At the same time, this close contact also helps to conduct and dissipate the heat generated during electrode operation through the splash shield 21, avoiding local overheating, and ensuring the accuracy of the relative position between the bowl-shaped adsorption structure and the protective shield, thereby maintaining a stable magnetic field distribution and adsorption effect.

[0049] In one embodiment, such as Figure 5 and Figure 6 As shown, the welding device for the lithium battery module busbar also includes a sealing member 12 disposed between the inner top wall of the anti-splash cover 21 and the metal adsorption member 3. The sealing member 12 includes a sealing ring 121 disposed on the metal adsorption member 3. The central axis of the sealing ring 121 coincides with the central axis of the cavity of the welding hole 22. The sealing ring 121 is movably disposed in the sealing groove 122. The sealing groove 122 is disposed on the anti-splash cover 21, and the cavity of the sealing groove 122 has an annular structure.

[0050] This embodiment, through the sliding engagement of the sealing ring 121 and the sealing groove 122 coinciding on the central axis, can maintain a dynamic seal between the metal adsorption component 3 and the inner top wall of the anti-splash cover 21 when the metal adsorption component 3 is adjusted in height. This effectively prevents spatter or metal vapor generated during welding from entering the gap between the two, avoiding mechanism jamming. At the same time, it can also reduce heat loss and ensure the stability of the internal temperature field of the bowl-shaped structure, thereby ensuring the airtightness of the welding process, the accuracy of temperature control, and the reliability of long-term equipment operation.

[0051] In one embodiment, a gap exists between the sealing ring 121 and the sealing groove 122, the gap being 0.05 mm to 0.2 mm in size. This micron-level precision gap ensures that the sealing ring 121 can slide smoothly and without jamming within the sealing groove 122, enabling flexible raising and lowering of the metal adsorption component 3; at the same time, it is small enough to form an effective airtight barrier, sufficient to prevent the entry of minute metal splashes and vapors. While maintaining the necessary degrees of freedom of movement for the moving parts, this ensures the reliability of the dynamic seal and prevents mechanical damage and internal contamination.

[0052] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the present invention. Furthermore, the present invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A welding device for a lithium battery module busbar, characterized in that, include: The welding head, with its welding end facing the part to be welded; An anti-splash component is disposed between the welding head and the part to be welded. The anti-splash component includes an anti-splash cover covering the part to be welded. The top plate of the anti-splash cover is provided with a welding hole for the welding head to perform welding operations. A metal adsorption component is disposed inside the anti-splash cover. The metal adsorption component has an inverted bowl-shaped structure. The metal adsorption component covers the part to be welded to adsorb splashed metal droplets. The end of the metal adsorption component away from the opening is provided with a connecting hole that communicates with the welding hole. A temperature regulating section is provided on the metal adsorption component, with the temperature generating end of the temperature regulating section facing the inside of the bowl-shaped structure, so as to balance the temperature of the central overheated area and the edge low-temperature area of ​​the part to be welded by raising the temperature inside the bowl-shaped structure. A temperature sensor is located inside the bowl-shaped structure, with the temperature measuring end of the temperature sensor facing the part to be welded. The metal adsorption component includes: The number of first electrodes is set to be several; The second electrode is provided in a plurality of them, and the plurality of second electrodes and the plurality of first electrodes are alternately connected and arranged in a bowl-shaped structure. The first electrode and the second electrode are arranged opposite to each other. When energized, a magnetic field is generated between the opposing second electrode and the first electrode to attract splashed metal droplets to adhere to the first electrode or the second electrode by magnetic force. The metal adsorption component is movably disposed within the splash guard, and the welding device for the lithium battery module busbar further includes a driving component, which comprises: The second actuator is located on the splash guard; The second drive rod is located on the drive end of the second driver. The second drive rod is movably inserted into the top plate of the splash shield. The end of the second drive rod away from the second driver is connected to the metal adsorption component.

2. The welding device for lithium battery module busbars according to claim 1, characterized in that, The temperature-regulating part is a ring structure, and there are several ring-shaped temperature-regulating parts. These several temperature-regulating parts are arranged along the axial direction of the metal adsorption member, and the diameter of the metal adsorption member increases sequentially from the welding hole to the part to be welded in the axial direction.

3. The welding device for lithium battery module busbars according to claim 1, characterized in that, The temperature-regulating part is a block structure, and the number of temperature-regulating parts is set to several. The several temperature-regulating parts form multiple ring structures in the circumferential direction of the metal adsorption component, and the multiple ring structures are arranged along the axial direction of the metal adsorption component. The diameter of the ring structure increases gradually from the welding hole to the welding part in the axial direction of the metal adsorption component.

4. The welding device for lithium battery module busbars according to claim 1, characterized in that, It also includes a cleaning component disposed within the splash guard, the cleaning component comprising: A permanent magnet rotor is movably disposed within a rotating groove, which is located on the inner side of the bowl-shaped structure and has an annular structure. A permanent magnet coil is disposed on the outside of the bowl-shaped structure, and the permanent magnet coil is radially wrapped around the permanent magnet rotor. A connecting rod is located inside the bowl-shaped structure and connected to the permanent magnet rotor. The connecting rod abuts against the inner wall of the bowl-shaped structure.

5. The welding device for lithium battery module busbars according to claim 4, characterized in that, The cleaning component also includes: A cleaning plate is disposed on the connecting rod, and the end of the cleaning plate away from the connecting rod abuts against the temperature-regulating part, wherein the number of cleaning plates matches the number of temperature-regulating parts.

6. The welding device for lithium battery module busbars according to claim 1, characterized in that, Also includes: A first drive rod is disposed on the welding head; A first driver, the driving end of which is connected to the end of the first driving rod away from the welding head; A mounting base is connected to the first driver and is attached to the housing of the welding device.

7. The welding device for lithium battery module busbars according to claim 6, characterized in that, It also includes a connecting portion for connecting the first drive rod and the splash guard, the connecting portion comprising: A fixing rod is provided on the first drive rod; The support is connected to the fixing rod; A telescopic assembly is provided on the support, and one end of the telescopic assembly away from the support is connected to the splash guard.

8. The welding device for lithium battery module busbars according to claim 1, characterized in that, It also includes a sealing member disposed between the inner top wall of the splash shield and the metal adsorption member, the sealing member comprising: A sealing ring is disposed on the metal adsorption component. The central axis of the sealing ring coincides with the central axis of the cavity of the welding hole. The sealing ring is movably disposed in the sealing groove, which is disposed on the anti-splash cover, and the cavity of the sealing groove has a ring-shaped structure.

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