A battery connection welding device

Abstract

The application discloses a battery connecting piece welding device, and relates to the technical field of electromagnetic eddy current welding. The device comprises a machine table, an electromagnetic eddy current heater, a fixing column and a limiting mechanism. The electromagnetic eddy current heater is arranged on the machine table and is used for inductively heating a welding ring and a workpiece. The fixing column is arranged in a heating area and is used for positioning the battery connecting piece. The limiting mechanism is arranged above the fixing column and is used for exerting a limiting force on the connecting plate in the radial and axial directions to inhibit displacement of the workpiece. The device can further comprise a frame body, a blowing nozzle and a detection unit mounted on the frame body. The blowing nozzle is used for spraying controllable airflow to a predetermined area of the workpiece, and the detection unit is used for monitoring a temperature field in real time. Through cooperation of mechanical limiting and airflow regulation based on real-time temperature feedback, the problems of local overheating caused by the geometric shape of the workpiece, surface coating interference and workpiece instability in a dynamic electromagnetic environment are solved, and the quality and consistency of automatic welding of the battery connecting piece are improved.

Description

Technical Field

[0001] This application relates to the field of electromagnetic eddy current welding technology, and in particular to a battery connector welding device. Background Technology

[0002] As the core electrical and mechanical connection components between the battery pack and external circuits and structural parts, the welding quality of battery connectors directly affects the conductivity, mechanical strength, and long-term operational safety and reliability of the battery system. Especially in applications such as new energy vehicles and energy storage systems, connectors need to withstand frequent vibrations, mechanical shocks, and high-current loads, requiring strict standards for weld consistency, uniformity, and reliability.

[0003] Traditional battery connector welding typically employs manual or semi-automatic methods, such as manually applying solder paste to the connector head before heating and welding it to the connecting plate. This method suffers from low production efficiency, the uniformity of solder distribution is highly dependent on operator skill, and it is prone to defects such as incomplete soldering and porosity, making it difficult to meet the demands of large-scale, high-quality manufacturing.

[0004] To improve efficiency and consistency, electromagnetic eddy current induction heating technology has been introduced into this field. This technology utilizes a high-frequency alternating magnetic field to directly induce eddy currents within the metal workpiece, achieving rapid, non-contact heating through the workpiece's own resistance, thus enabling automated welding. However, when applied to complex battery connectors that often contain right angles and sharp edges, this technology exposes a series of deep-seated technical problems inherent in physical properties that are difficult to address effectively with existing methods. The specific manifestations and root causes are as follows: 1. Inherent thermal runaway problems caused by geometry When workpieces to be welded have features such as right angles or sharp edges, especially connecting plates, which act as current carriers and are often designed in L-shapes, Z-shapes, or other bent structures for layout purposes, severe edge effects can occur in high-frequency alternating magnetic fields. Magnetic field lines become abnormally concentrated at sharp corners, resulting in a significantly higher magnetic field strength in these areas compared to flat or rounded regions. According to Faraday's law of electromagnetic induction, the induced eddy current density is proportional to the magnetic field strength, leading to a significant increase in eddy current density at right angles. More importantly, the generation of Joule heat is proportional to the square of the eddy current density. Therefore, not only are eddy currents concentrated at right angles, but the rate of heat generation per unit volume also increases quadratically, rapidly becoming the main area for internal heat generation. Simultaneously, the small heat dissipation area and poor heat conduction path in right-angle regions result in heat generation far exceeding heat dissipation, creating uncontrollable instantaneous localized overheating. This leads to coarse grains, decreased mechanical properties, and even localized melting at the right angles, while the central planar region may be underheated, resulting in uneven weld strength or even weld failure. Existing technologies can improve the situation to some extent by optimizing the coil shape or adjusting the heating parameters, but they cannot fundamentally and dynamically eliminate this inherent thermal field distortion determined by the geometry.

[0005] 2. Interference problem caused by the superposition of insulating surface coatings To prevent corrosion or meet other process requirements, battery connectors often have a micron-level insulating oxide layer or organic coating, such as anti-fingerprint oil, on their surface. When such coatings cover areas like right angles, a combined effect of insulation barrier and smoldering occurs. The coating first blocks the magnetic field, preventing the underlying metal from generating induced eddy currents in the initial stage, resulting in severely delayed heating. Subsequently, the coating decomposes and carbonizes under the influence of surrounding heat conduction. When it breaks and fails, the high-intensity magnetic field acts directly on the preheated metal right angle, triggering a rapid increase in eddy currents and heat, with an extremely fast and unpredictable temperature rise rate. Simultaneously, the gases and carbon slag produced by coating decomposition contaminate the welding interface, severely hindering the wetting of the base material by the molten solder, leading to porosity, inclusions, and incomplete welds, drastically reducing joint reliability. Existing single-mode induction heating processes lack effective online treatment methods for this type of interface contamination problem.

[0006] 3. Workpiece instability during dynamic processes During electromagnetic eddy current heating, a complex Lorentz force is generated between the alternating magnetic field acting on the workpiece and the eddy currents induced within it. This force can cause sheet-like connecting plates to bounce or vibrate perpendicular to the welding surface, and may also generate rotational torque in non-axisymmetric workpieces. This microscopic displacement or vibration during heating disrupts the tight fit of the welding interface, alters the gaps in the capillary filling of the solder, and directly leads to fluctuations and decreased consistency in weld quality. Traditional mechanical fixtures only provide static fixation and are insufficient to continuously ensure the absolute stability of workpieces, especially thin-walled parts, in a dynamic electromagnetic environment.

[0007] In summary, existing battery connector welding technologies using electromagnetic eddy current heating face three intertwined core technical challenges: unavoidable localized instantaneous overheating determined by the rectangular geometry of the workpiece; heating delay, interface contamination, and secondary overheating caused by the surface insulating coating; and the difficulty in maintaining workpiece stability under dynamic electromagnetic environments. These problems result in severely uneven welding temperature fields, narrow process windows, poor joint quality consistency, and insufficient reliability, seriously hindering the application of this technology in the automated production of high-performance battery connectors. Currently, the industry lacks a systematic welding solution capable of simultaneously identifying, actively intervening in, and collaboratively resolving these complex problems online. Summary of the Invention

[0008] To address the aforementioned problems, this application provides a battery connector welding apparatus.

[0009] A battery connector welding apparatus includes a machine base, an electromagnetic eddy current heater, a fixing column, and a limiting mechanism. The electromagnetic eddy current heater is disposed on the machine base and generates an alternating magnetic field to inductively heat a welding ring and a workpiece placed within its heating area. The fixing column is disposed within the heating area and positions and supports the battery connector to be welded. The limiting mechanism is disposed above the fixing column and applies radial and axial limiting forces to a connecting plate superimposed on the battery connector to suppress workpiece displacement during the welding process.

[0010] Compared with existing technologies, the above-mentioned technical solution forms a basic structure for an electromagnetic eddy current welding device. The fixed column, in conjunction with the limiting mechanism positioned above it, applies spatial constraints to the connecting plate before welding begins, providing a structural basis for overcoming workpiece instability under subsequent dynamic electromagnetic conditions.

[0011] Furthermore, the limiting mechanism includes a radial limiting component for providing a radial limiting force. The radial limiting component includes a drive cylinder, the output shaft of which is disposed toward the heating area of ​​the electromagnetic eddy current heater and can be controllably extended downward to press against the connecting plate.

[0012] Compared with existing technologies, the above-mentioned technical solution utilizes a driving cylinder to provide active and controllable downward pressure. This radial force is used to resist the bouncing or vibration of the connecting plate caused by the Lorentz force during electromagnetic eddy current heating, ensuring that the welding interface remains tightly fitted throughout the heating process, which helps to solve the problem of dynamic instability.

[0013] Furthermore, the limiting mechanism also includes an axial limiting component for providing axial limiting force. The axial limiting component includes an adjusting block and at least one limiting post. The adjusting block is connected to the output shaft of the driving cylinder, and at least one limiting post is mounted on the adjusting block and can be adjusted to press the connecting plate from the side.

[0014] Compared with existing technologies, the above-mentioned technical solution provides adjustable lateral clamping force through the limiting post. This constitutes a multi-dimensional constraint on the workpiece, which helps to prevent the connecting plate from sliding or rotating in the horizontal direction, ensures welding alignment accuracy, and enhances the stability of the workpiece system under electromagnetic force and thermal stress.

[0015] Furthermore, the adjusting block is provided with a sliding groove, and the end of the limiting post is provided with a slider that is adapted to the sliding groove. The slider is slidably installed in the sliding groove. The limiting post is fixed relative to the adjusting block by a first locking member.

[0016] Compared with existing technologies, by adopting the above technical solution, the cooperative design of the slide and the slider allows the extension length or angle of the limiting post to be continuously adjusted within a certain range. This structure is easy to adapt to connecting plates of different sizes or shapes, improving the adjustment efficiency of the device.

[0017] Furthermore, it also includes a rotating plate, the output shaft of the driving cylinder is fixedly connected to the rotating plate; the adjusting block is rotatably connected to the rotating plate through a rotating shaft, so that the posture of the adjusting block is adjustable; the adjusting block is fixed relative to the rotating shaft through a second locking member.

[0018] Compared with existing technologies, the above technical solution achieves the adjustment of the overall posture and tilt angle of the adjusting block through a rotating shaft connection. This allows the axial limiting component to adapt to the non-horizontal state or special structure of the connecting plate, ensuring the effective application of lateral clamping force.

[0019] Furthermore, it also includes a frame, which is mounted on the machine base, and the limiting mechanism is mounted on the frame.

[0020] Compared with existing technologies, by adopting the above technical solution, the frame provides a stable mounting platform for components such as the limiting mechanism, the nozzle, and the detection unit. This arrangement facilitates assembly and adjustment, while ensuring the stability of the spatial positional relationship of each component relative to the heating area.

[0021] Furthermore, it also includes at least one blow nozzle mounted on the frame and directed toward the heating area of ​​the electromagnetic eddy current heater for spraying a controllable airflow onto a predetermined area of ​​the workpiece.

[0022] Compared with existing technologies, by adopting the above technical solution, the blow nozzle is used to spray a controllable airflow onto a specific area of ​​the workpiece. On the one hand, it can blow away coating decomposition products during the pretreatment stage; on the other hand, it can cool overheated areas during the welding stage, providing a means to achieve thermal field management.

[0023] Furthermore, it also includes a detection unit, which is installed on the frame and has a field of view covering the heating area of ​​the electromagnetic eddy current heater, for real-time monitoring of the temperature field distribution during the welding process.

[0024] Compared with existing technologies, by adopting the above technical solution, the detection unit can acquire the temperature information of the workpiece surface in a non-contact, full-field, and rapid manner, providing a basis for sensing thermal field distortion and identifying overheated areas.

[0025] Furthermore, it also includes a fixing plate, which is mounted on the machine base. The fixing plate is provided with a mounting groove for engaging the end of the connecting plate and a threaded hole for locking the connecting plate.

[0026] Compared with existing technologies, by adopting the above technical solution, the fixing plate provides the initial positioning and fixing point for the connecting plate. The fit between its mounting groove and threaded hole enables the clamping of the connecting plate, which, together with the limiting mechanism, forms a workpiece fixing system.

[0027] Furthermore, it also includes a welding stand, which is disposed on the machine base, and the electromagnetic eddy current heater and the fixing column are both mounted on the welding stand.

[0028] Compared to existing technologies, the above-mentioned technical solution integrates the electromagnetic eddy current heater and the fixed column into one unit using a welding base. This modular design facilitates installation and maintenance, while the insulating and heat-resistant material provides thermal insulation.

[0029] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a limiting mechanism consisting of a driving cylinder and a limiting post, radial and axial forces are applied to the connecting plate to form spatial constraints, suppressing workpiece displacement caused by Lorentz force and thermal stress during electromagnetic eddy current heating, and ensuring the stability of the welding interface.

[0030] 2. By integrating a detection unit and a blower nozzle, and in conjunction with a control unit, a temperature field control system based on real-time temperature feedback is constructed. This system can identify and intervene online in localized overheating caused by edge effects, and can treat surface insulating coatings through a combination of low-power heating and airflow purging, thereby improving thermal field uniformity and reducing interface contamination.

[0031] 3. Through the coordination of the fixed column, fixed plate, and limiting mechanism, as well as the cooperation of the blow nozzle and detection unit, this device combines mechanical limiting with temperature field control to form a systematic solution. This solution helps to address issues of stability, uniformity, and cleanliness in welding, thereby improving the consistency of welding quality. Attached Figure Description

[0032] Figure 1 This is a three-dimensional view of the device, mainly showing its overall structure; Figure 2 This is a partial view of the device, mainly showing the state of the connectors and connecting plates during welding; Figure 3 This is a partial view of the device, mainly showing the welding base and the fixing column.

[0033] Explanation of reference numerals in the attached drawings: 1. Machine base; 11. Frame; 111. Blowing nozzle; 112. Detection unit; 12. Fixing plate; 13. Fixing column; 14. Welding seat; 2. Electromagnetic eddy current heater; 31. Drive cylinder; 32. Rotating plate; 33. Limiting column; 34. Adjusting block; 341. Slide groove; 342. Sliding block; 4. Connecting piece; 5. Connecting plate. Detailed Implementation

[0034] The embodiments illustrated in the accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of protection of this application. Other implementation methods obtained by those skilled in the art based on the described embodiments without inventive effort are all within the scope of protection of this application.

[0035] This application discloses a battery connector welding device, comprising: Reference Figure 1 The machine base 1 serves as the supporting foundation for the entire device. Machine base 1 is typically made of a rigid metal material, such as steel plate, to provide a stable and level mounting platform for other functional components.

[0036] Reference Figure 3 The welding base 14 is fixedly mounted on the table surface of the machine base 1. The welding base 14 is preferably made of an insulating and heat-resistant material, such as ceramic or mica plate, to support and position the core heating component, while providing heat insulation.

[0037] Reference Figure 2 and Figure 3 The electromagnetic eddy current heater 2, serving as the core heat source, is fixedly mounted on the welding base 14. The electromagnetic eddy current heater 2 integrates a high-frequency induction coil, which generates a high-frequency alternating magnetic field when energized. The effective range of this magnetic field constitutes its heating zone. The electromagnetic eddy current heater 2 is used for non-contact induction heating of the welding ring and workpiece placed within this heating zone; the heat is generated by eddy currents within the workpiece.

[0038] Reference Figure 2 and Figure 3 The fixing post 13 is coaxially positioned at the center of the heating area of ​​the electromagnetic eddy current heater 2 and vertically fixed to the welding base 14. The diameter of the fixing post 13 matches the mounting hole at the bottom of the battery connector 4 to be welded, and is used to position and support the connector 4 during the welding process. The connector 4 is inserted into the fixing post 13 through the mounting hole at its bottom to achieve initial positioning.

[0039] Reference Figure 2 and Figure 3 A fixing plate 12 is mounted on the machine base 1 and located on one side of the welding seat 14. The fixing plate 12 has a mounting groove and a threaded hole. The shape of the mounting groove matches the contour of one end of the connecting plate 5 to be welded, and is used to snap and pre-position the end of the connecting plate 5. The threaded hole is used to pass through screws or other locking devices to lock the end of the connecting plate 5 inserted into the mounting groove onto the fixing plate 12, thereby fixing one end of the connecting plate 5.

[0040] Reference Figure 1 The frame 11, in the form of a gantry or cantilever structure, is securely mounted on the machine base 1 and spans above the welding seat 14 and the fixed column 13. The frame 11 provides mounting points for various execution and monitoring components.

[0041] Reference Figure 1 and Figure 2 The limiting mechanism is integrally mounted on the crossbeam of the frame 11 and located directly above the fixed column 13. During electromagnetic eddy current heating, the limiting mechanism applies stable and controllable radial (vertically downward) and axial (horizontal) limiting forces to the connecting plate 5 superimposed on the connecting member 4, thereby suppressing workpiece bouncing, vibration, or displacement caused by Lorentz force and thermal stress. The limiting mechanism specifically includes a radial limiting component and an axial limiting component.

[0042] Reference Figure 1 and Figure 2 The radial limiting component includes a drive cylinder 31, whose cylinder body is fixed on the frame 11, and whose output shaft is vertically downward toward the heating area of ​​the fixed column 13 and the electromagnetic eddy current heater 2. The drive cylinder 31 is controlled to move, and when its output shaft extends downward, it can apply vertical downward pressure to the connecting plate 5 below, providing radial limiting force, overcoming the upward repulsive force caused by the magnetic field, and ensuring a tight fit of the welding interface.

[0043] Reference Figure 1 and Figure 2The axial limiting assembly includes an adjusting block 34 and a limiting post 33. The adjusting block 34 is fixedly connected to the end of the output shaft of the drive cylinder 31 via a rotating plate 32, so that it can rise and fall synchronously with the output shaft of the drive cylinder 31. At least one limiting post 33 is installed on the adjusting block 34, preferably two limiting posts 33. By adjusting the position of the limiting post 33 relative to the adjusting block 34, its end can abut against and press against the side of the connecting plate 5 from the side, thereby providing axial limiting force and preventing the connecting plate 5 from moving horizontally or rotating. To achieve flexible adjustment, one embodiment of this application is as follows: a groove 341 is opened on the adjusting block 34, and a slider 342 adapted to the groove 341 is provided at the end of the limiting post 33. The slider 342 can slide along the groove 341, thereby changing the extension length or angle of the limiting post 33. After adjustment, the slider 342 is locked in the groove 341 by tightening the first locking member, such as a screw. Furthermore, the adjusting block 34 can be rotatably connected to the rotating plate 32 via a rotating shaft, making the angle of the adjusting block 34 adjustable. After the angle is adjusted, the posture can be fixed by locking the rotating shaft with a second locking component, such as a nut.

[0044] Reference Figure 1 and Figure 2 A blow nozzle 111, mounted on the frame 11, is positioned so that the nozzle is directed towards a predetermined area of ​​the workpiece prone to overheating within the heating zone of the electromagnetic eddy current heater 2, such as the right-angle bend of the connecting plate 5. The blow nozzle 111 is connected to a controllable air source and is used to spray a controllable, room-temperature airflow onto specific areas of the workpiece. Its functions include: in the pretreatment stage, lower-power heating combined with airflow purging removes the insulating coating from the workpiece surface and blows away contaminants; in the welding stage, cooling of the overheated area is implemented according to temperature control commands to balance the thermal field.

[0045] Reference Figure 1 and Figure 2 The detection unit 112, in this embodiment, is configured as a thermal imager, mounted on the frame 11, with its field of view covering the entire heating area of ​​the electromagnetic eddy current heater 2. The detection unit 112 is used to capture and feed back images of the workpiece surface temperature field distribution during the welding process at high frequency in real time, providing temperature data to the control unit.

[0046] The control unit, typically a PLC or industrial computer, is electrically connected to the electromagnetic eddy current heater 2, the drive cylinder 31, the air path control valve of the blow nozzle 111, and the detection unit 112. The control unit contains a pre-stored welding process program, receives signals from the detection unit 112, and adjusts the power output of the electromagnetic eddy current heater 2, as well as the start / stop and airflow of the blow nozzle 111, according to preset logic such as thresholds based on the temperature rise rate or absolute temperature difference, thereby executing the welding process.

[0047] The implementation principle of this application is as follows: First, the workpiece is clamped and positioned. As shown in the attached diagram, the battery connector 4 is inserted into the fixing post 13. Then, the welding ring is fitted onto the connector head of the connector 4, i.e., the welding position, ensuring that the right-angle structure of the connector 4 and the connecting plate 5 to be welded faces the blow nozzle 111. Afterward, the pre-set hole on the connecting plate 5 is fitted onto the connector head of the connector 4, so that the welding ring is pressed between the connecting plate 5 and the connector 4.

[0048] After the above assembly is completed, a mechanical limiting operation is performed before welding. First, one end of the connecting plate 5 is inserted and snapped into the mounting groove of the fixing plate 12, and locked with a threaded fitting to fix one end. Then, the output shaft of the drive cylinder 31 located above the fixing post 13 is extended to drive the adjusting block 34 connected to it to press down, so that the adjusting block 34 abuts against the connector head of the connecting piece 4, completing radial limiting. Next, by sliding the slider 342 installed in the slide groove 341 of the adjusting block 34, or by rotating the adjusting block 34 to move the rotating plate 32 at an angle, the position of the limiting post 33 is adjusted so that its end abuts against and presses against the side of the connecting plate 5, completing axial limiting. This mechanical limiting system works together to effectively resist workpiece displacement caused by electromagnetic force and thermal stress during welding.

[0049] Secondly, the integrated temperature field control system of the device, consisting of a detection unit 112, a blower head 111, and a control unit, is responsible for improving the uniformity of the thermal field. Its working principle is divided into two stages: Pre-treatment stage: For workpieces with an insulating coating, the system activates a low-power heating mode. Simultaneously, the blower nozzle 111 blows a room-temperature airflow into the coated area. The gentle heating promotes coating decomposition, while the airflow carries away the decomposition products, such as gases and carbon residue generated during coating decomposition. The detection unit 112 monitors in real time; when it detects an inflection point where the temperature rise rate significantly increases due to coating failure and the metal substrate beginning to directly generate heat, the pre-treatment is complete.

[0050] Welding and Thermal Management Stage: The system switches to normal welding power. At this time, the detection unit 112 continuously scans the workpiece temperature. The algorithm within the control unit analyzes the data in real time. Once an area is identified as being or about to overheat due to edge effects, the control unit immediately instructs the corresponding blow nozzle 111 to activate, spraying room-temperature airflow for targeted cooling of that area. First, the detection unit 112 monitors the temperature field in real time, identifying overheated areas where the temperature or rate of temperature rise exceeds limits. Then, the control unit generates control commands including airflow parameters based on the degree of overheating. Next, the corresponding blow nozzle 111 executes the commands, performing forced convection cooling. Simultaneously, the system dynamically adjusts the airflow based on real-time feedback of the cooling effect until the temperature in that area returns to the set range. Through the synergy of induction heating and airflow cooling under closed-loop control, heat accumulation caused by right angles is suppressed, and temperature fluctuations in the welding area are controlled within a predetermined range.

[0051] This device ensures process stability through mechanical limiting and improves thermal field uniformity through airflow control based on temperature feedback. The combination of these two technologies, applying electromagnetic eddy current heating technology to the welding of battery connectors with complex geometries and surface conditions, helps improve welding quality and consistency.

[0052] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery connector welding device, characterized in that, include: Machine (1); An electromagnetic eddy current heater (2) is installed on the machine base (1) to generate an alternating magnetic field to inductively heat the welding ring and workpiece placed in its heating area. A fixed column (13) is set in the heating area of ​​the electromagnetic eddy current heater (2) for positioning and supporting the battery connector (4) to be welded; A limiting mechanism is provided above the fixed column (13) to apply radial and axial limiting forces to the connecting plate (5) superimposed on the battery connector (4) to suppress workpiece displacement during the welding process.

2. The battery connector welding device according to claim 1, characterized in that, The limiting mechanism includes a radial limiting component for providing radial limiting force. The radial limiting component includes a drive cylinder (31) whose output shaft is disposed toward the heating area of ​​the electromagnetic eddy current heater (2) and can extend downward in a controlled manner to press against the connecting plate (5).

3. The battery connector welding device according to claim 2, characterized in that, The limiting mechanism further includes an axial limiting component for providing axial limiting force. The axial limiting component includes an adjusting block (34) and at least one limiting post (33). The adjusting block (34) is connected to the output shaft of the driving cylinder (31). At least one limiting post (33) is mounted on the adjusting block (34) and its position can be adjusted to press the connecting plate (5) from the side.

4. The battery connector welding device according to claim 3, characterized in that, The adjusting block (34) is provided with a sliding groove (341), and the end of the limiting post (33) is provided with a slider (342) adapted to the sliding groove (341). The slider (342) is slidably installed in the sliding groove (341). The limiting post (33) is fixed relative to the adjusting block (34) by a first locking member.

5. The battery connector welding device according to claim 3, characterized in that, It also includes a rotating plate (32), the output shaft of the driving cylinder (31) is fixedly connected to the rotating plate (32); the adjusting block (34) is rotatably connected to the rotating plate (32) through a rotating shaft, so that the posture of the adjusting block (34) is adjustable; the adjusting block (34) is fixed relative to the rotating shaft through a second locking member.

6. A battery connector welding apparatus according to any one of claims 1 to 5, characterized in that, It also includes a frame (11) which is mounted on the machine base (1) and the limiting mechanism is mounted on the frame (11).

7. A battery connector welding device according to claim 6, characterized in that, It also includes at least one blow nozzle (111) mounted on the frame (11) and directed toward the heating area of ​​the electromagnetic eddy current heater (2) for spraying a controllable airflow onto a predetermined area of ​​the workpiece.

8. A battery connector welding device according to claim 6, characterized in that, It also includes a detection unit (112), which is installed on the frame (11) and its field of view covers the heating area of ​​the electromagnetic eddy current heater (2) for real-time monitoring of the temperature field distribution during the welding process.

9. A battery connector welding device according to claim 1, characterized in that, It also includes a fixing plate (12), which is mounted on the machine base (1). The fixing plate (12) is provided with a mounting groove for engaging the end of the connecting plate (5) and a threaded hole for locking the connecting plate (5).

10. A battery connector welding device according to claim 1, characterized in that, It also includes a welding seat (14), which is disposed on the machine base (1), and the electromagnetic eddy current heater (2) and the fixed column (13) are both mounted on the welding seat (14).

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