Lithium battery pack sampling connection plate automatic welding equipment and control method thereof

Abstract

The application discloses a kind of lithium battery pack sampling connection plate automatic welding equipment and its control method, lithium battery pack sampling connection plate automatic welding equipment includes rack, positioning mechanism, variable distance clamping mechanism, welding mechanism and control mechanism.Adjustable spacing is driven by variable distance clamping mechanism, and the clamping part of multiple clamping wires is self-adaptive, can quickly complete the accurate alignment of multiple wires and each welding area of substrate, solve the problem of insufficient alignment accuracy of flexible wire under narrow spacing;N welding heads less than the total number of wires are used to complete point-by-point welding by step movement with positioning seat, which not only breaks through the limitation of physical size of welding head on narrow spacing multi-welding point welding, but also greatly improves the welding efficiency compared with single welding head welding in turn, can also reduce the local heating time of substrate, reduce the risk of substrate heating deformation, finally get the sampling connection plate with stable welding quality and high alignment accuracy, can better meet the requirements of golf cart lithium battery pack on sampling connection reliability.

Description

Technical Field

[0001] This application relates to the field of lithium battery pack manufacturing technology, and in particular to an automatic welding equipment for lithium battery pack sampling connection plates. Background Technology

[0002] Golf carts, as a widely used course vehicle, are undergoing a comprehensive upgrade in their power systems, moving from traditional lead-acid batteries to lithium batteries. Lithium batteries offer significant advantages such as high energy density, long cycle life, and light weight, effectively extending the driving range of golf carts, reducing overall weight, and lowering maintenance costs.

[0003] In lithium-ion battery packs, the sampling connection board is a key component of the battery management system (BMS), used to collect and transmit the voltage and temperature signals of each individual cell to the BMS. The sampling connection board typically consists of a substrate and multiple wires. The substrate has several soldering areas, and one end of each wire needs to be soldered to a corresponding soldering area on the substrate. The other end of the wire connects to the cell or the data acquisition circuit. The reliability of the sampling connection directly affects the accuracy of the BMS's monitoring of the cell status, thus impacting the safety and lifespan of the entire battery pack. Under the vibration conditions of a golf cart, if the solder joints of the sampling connection board have poor soldering or insufficient strength, they are prone to loosening over long-term vibration, leading to signal loss or deviation, and even posing a short-circuit risk.

[0004] Currently, wire welding on sampling connection boards mainly relies on manual labor or semi-automatic equipment. Manual operation requires manually positioning each wire and welding point by point, which is labor-intensive, inefficient, and the welding quality is highly dependent on the operator's skill level, making it difficult to meet the stringent reliability requirements of lithium battery packs used in golf carts. When using semi-automatic equipment for welding, the welding areas on the substrate are usually arranged with narrow spacing, making it difficult to accurately align the flexible wires with the welding areas. Moreover, due to the physical size limitations of the welding head, it is impossible to configure an independent welding head for each wire under narrow spacing, and welding can only be done sequentially with a single welding head, which is inefficient and the substrate is prone to heat deformation. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an automatic welding equipment for lithium battery pack sampling connection plates, which aims to solve the technical problems of insufficient alignment accuracy, low production efficiency, and unstable welding quality in existing welding solutions, and improve the welding qualification rate and production efficiency of narrow-pitch multi-weld-point sampling connection plates.

[0006] This application also proposes a control method for an automatic welding equipment for lithium battery pack sampling connection plates.

[0007] According to the first aspect of the present application, an automatic welding device for a lithium battery pack sampling connection plate includes a substrate and wires. The substrate has multiple welding zones arranged in a row, and the wires are welded to each of the welding zones. The automatic welding device includes: a frame; a positioning mechanism disposed on the frame, the positioning mechanism including a positioning seat and a first driving component, the positioning seat for positioning the substrate, and the first driving component connected to the positioning seat; a variable-pitch clamping mechanism including a mounting frame, multiple clamping parts, and a second driving component, the mounting frame being disposed on the frame, the multiple clamping parts being slidably arranged on the mounting frame, each clamping part for clamping a wire, and the second driving component connected to the clamping part; and a welding mechanism disposed on the frame and above the positioning seat, the welding mechanism for welding the wires to the corresponding welding zones, the welding mechanism including N... A welding head and a third driving component, where N is a positive integer less than the number of wires, and the third driving component is connected to the welding head; a control mechanism, including a vision detection component and a controller, wherein the vision detection component is used to acquire images of the substrate and confirm the set spacing of the welding areas, and the controller is connected to the vision detection component, the first driving component, the second driving component, and the third driving component respectively; wherein, the controller is used to confirm the target spacing between the clamping parts according to the set spacing, and control the second driving component and the third driving component to drive the clamping parts and the welding head to move respectively, so that the wires on the clamping parts and the welding head are aligned with the corresponding welding areas one by one; the controller is also used to control the first driving component to drive the positioning seat to move step by step along the arrangement direction of the welding areas at a preset step distance, so that the welding head welds the wires one by one to the corresponding welding areas.

[0008] The automatic welding equipment for lithium battery pack sampling connection plates according to the first aspect of the present application has at least the following advantages: by using a variable-pitch clamping mechanism to drive the clamping parts of multiple clamping wires to adaptively adjust the spacing, it can quickly and accurately align multiple wires with each welding area of ​​the substrate, solving the problem of insufficient alignment accuracy of flexible wires under narrow spacing; by using N welding heads, which are fewer than the total number of wires, in conjunction with the positioning seat to move step by step to complete point-by-point welding, it not only breaks through the limitation of the physical size of the welding head on welding multiple welding points with narrow spacing, but also greatly improves the welding efficiency compared with welding with a single welding head in sequence, and can also reduce the local heating time of the substrate, reduce the risk of substrate deformation due to heat, and finally obtain a sampling connection plate with stable welding quality and high alignment accuracy, which can better meet the requirements of golf cart lithium battery packs for sampling connection reliability.

[0009] According to the automatic welding equipment for lithium battery pack sampling connection board according to the first aspect of the present application, the clamping part is provided with a displacement sensor. The displacement sensor is used to monitor the actual position of the clamping part in real time. The displacement sensor is connected to the controller. The controller is used to determine whether the actual position has reached the target position of the clamping part. If it has not reached the target position, the controller controls the second driving component to drive the clamping part to move until the clamping part reaches the target position.

[0010] According to the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of the present application, the variable pitch clamping mechanism further includes a wire feeding assembly, which is disposed on the side of the clamping part away from the positioning seat, and is used to feed wires to the clamping part.

[0011] According to the automatic welding equipment for lithium battery pack sampling connection board according to the first aspect of the present application, the wire feeding assembly is connected to a pre-treatment assembly, the pre-treatment assembly is disposed on the frame, the pre-treatment assembly is used to pre-treat the wire, and the pre-treatment assembly includes an unwinding unit, a stripping unit, a shaping unit, a tinning unit and a cutting unit arranged sequentially along the wire feeding direction.

[0012] According to the automatic welding equipment for lithium battery pack sampling connection board according to the first aspect of the present application, the visual inspection component includes a CCD camera and / or a laser contour sensor.

[0013] According to the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of the present application, there are 2 to 4 welding heads, which are equidistantly arranged along the arrangement direction of the welding area, and the distance between adjacent welding heads is equal to an integer multiple of the distance between adjacent welding areas.

[0014] The automatic welding equipment for lithium battery pack sampling connection plates according to the first aspect of the present application further includes an exhaust gas treatment mechanism. The exhaust gas treatment mechanism includes a gas collection hood, an exhaust pipe, and an exhaust fan. The gas collection hood is disposed on the side of the welding mechanism. The gas collection hood is provided with a first air intake and a second air intake. The first air intake is located on the side of the gas collection hood close to the welding mechanism, and the second air intake is located on the top of the gas collection hood. The exhaust pipe is connected to the gas collection hood, and the exhaust fan is connected to the exhaust pipe.

[0015] The control method for the automatic welding equipment for lithium battery pack sampling connection plates according to the second aspect embodiment of this application, applied to the automatic welding equipment for lithium battery pack sampling connection plates according to the first aspect embodiment of this application, includes: S1: The substrate is positioned by a positioning mechanism; S2: Acquire an image of the substrate using a vision inspection component and obtain the set spacing between the welding areas; S3: Confirm the target spacing between the clamping parts according to the set spacing; S4: According to the target spacing, control the second driving component and the third driving component to drive the clamping part and the welding head to move respectively, so that the wires on the clamping part and the welding head are aligned with the corresponding welding areas one by one; S5: Control the welding mechanism to weld the wire to the corresponding welding area; The welding mechanism includes N welding heads, where N is a positive integer less than the number of wires; step S5 includes: controlling the first driving component to drive the positioning seat to move step by step along the arrangement direction of the welding area at a preset step distance, so that the welding area enters the working area of ​​the welding head in sequence; and controlling the welding head to weld the wires one by one to the corresponding welding area.

[0016] The control method of the automatic welding equipment for lithium battery pack sampling connection plate according to the second aspect embodiment of this application has at least the following beneficial effects: The control method of the automatic welding equipment for lithium battery pack sampling connection plate according to the second aspect embodiment of this application obtains the set distance between welding areas through a vision inspection component, confirms the target distance between clamping parts, and then drives the clamping parts of multiple clamping wires to adaptively adjust the distance through a variable-pitch clamping mechanism, which can quickly complete the precise alignment of multiple wires with each welding area of ​​the substrate, solving the problem of insufficient alignment accuracy of flexible wires under narrow spacing; using N welding heads, which are fewer than the total number of wires, in conjunction with the positioning seat to move step by step to complete point-by-point welding, not only breaks through the limitation of the physical size of the welding head on the welding of multiple welding points in narrow spacing, but also greatly improves the welding efficiency compared with welding with a single welding head in sequence, and can also reduce the local heating time of the substrate, reduce the risk of substrate deformation due to heat, and finally obtain a sampling connection plate with stable welding quality and high alignment accuracy, which can better meet the requirements of golf cart lithium battery packs for sampling connection reliability.

[0017] According to the control method of the automatic welding equipment for lithium battery pack sampling connection board according to the second aspect embodiment of this application, the clamping part is provided with a displacement sensor, which is used to monitor the actual position of the clamping part in real time; step S4 includes: obtaining the actual position, determining whether the actual position has reached the target position of the clamping part, and if not, controlling the second driving component to drive the clamping part to move until the clamping part reaches the target position, so that the wires on the clamping part are aligned with the corresponding welding areas one by one.

[0018] According to the control method of the automatic welding equipment for lithium battery pack sampling connection plate according to the second aspect embodiment of this application, the variable pitch clamping mechanism further includes a wire feeding assembly, which is used to compensate the wire to the clamping part; in step S4, when the first driving assembly drives the clamping part to move to increase the pitch, the wire feeding assembly feeds the wire away from the clamping part; when the first driving assembly drives the clamping part to move to decrease the pitch, the wire feeding assembly retracts the wire towards the clamping part.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the sampling connection plate in the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of this application; Figure 2 This is a schematic diagram of the structure of an automatic welding device for a lithium battery pack sampling connection plate according to the first aspect of this application; Figure 3 This is a block diagram of the control connection system of the automatic welding equipment for the lithium battery pack sampling connection board according to the first aspect of this application; Figure 4 This is a schematic diagram of the positioning seat in the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of this application; Figure 5 This is a schematic diagram of the variable-pitch clamping mechanism in the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of this application; Figure 6 This is a schematic diagram of the wire feeding assembly in the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of this application; Figure 7 This is a schematic diagram of the welding mechanism in the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of this application; Figure 8 This is a block diagram of the connection system of the control mechanism in the automatic welding equipment for the sampling connection plate of the lithium battery pack according to the first aspect of this application; Figure 9 This is a schematic diagram of the waste gas treatment mechanism in the automatic welding equipment for lithium battery pack sampling connection plate according to the first aspect of this application; Figure 10 This is a flowchart of a control method for an automatic welding device for a lithium battery pack sampling connection plate, which is an embodiment of the second aspect of this application.

[0021] Figure label: Sampling connection plate 1000; substrate 1001; wire 1002; soldering area 1003; 100 racks; Positioning mechanism 200; positioning seat 210; base plate 211; positioning plate 212; positioning groove 213; suction hole 214; mounting groove 215; pressure block 216; spring 217; first drive assembly 220; Variable pitch clamping mechanism 300; mounting frame 310; clamping part 320; fixed base 321; clamping cylinder 322; clamping block 323; displacement sensor 324; second drive assembly 330; wire feeding assembly 340; wire feeding frame 341; active wire feeding roller 342; driven pressure roller 343; wire feeding motor 344; pretreatment assembly 350; unwinding unit 351; peeling unit 352; shaping unit 353; tinning unit 354; cutting unit 355; Welding mechanism 400; welding head 410; third drive assembly 420; Control mechanism 500; vision inspection component 510; controller 520; Waste gas treatment mechanism 600; gas collection hood 610; first air intake 611; second air intake 612; exhaust pipe 620; exhaust fan 630. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this application, unless otherwise expressly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this application based on the specific content of the technical solution. In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] Reference Figure 1 In a golf cart lithium battery pack, the sampling connection board 1000 is a key component of the battery management system (BMS), used to collect and transmit the voltage and temperature signals of each individual cell to the BMS. The sampling connection board 1000 includes a substrate 1001 and wires 1002. The substrate 1001 has multiple welding areas 1003, and multiple wires 1002 are provided. One end of each wire 1002 is welded to a welding area 1003, while the other end connects to a cell or the data acquisition circuit. The voltage and temperature parameters of the cells during operation are transmitted to the BMS through the sampling connection board 1000, enabling real-time monitoring of the operating status of each individual cell in the lithium battery pack, ensuring the safe and stable operation of the battery pack. The welding quality of the sampling connection board 1000 directly affects the reliability of the sampling signal transmission. Inaccurate welding alignment or welding defects can lead to signal transmission interruption, excessive contact resistance, or even poor solder joints and detachment, resulting in inaccurate monitoring by the BMS and affecting the normal operation of the entire lithium battery pack. The automatic welding equipment and control method described in this application, designed for the processing requirements of sampling connection plates with more than 1,000 welding points, narrow spacing, and batch production, realizes fully automated processing from wire 1002 pretreatment, adaptive alignment to step-by-step welding, which can effectively ensure welding accuracy and production efficiency, and reduce processing costs and defect rate.

[0027] Reference Figures 2 to 9The first aspect of this application provides an automatic welding device for lithium battery pack sampling connection plates, including a frame 100, a positioning mechanism 200, a variable-pitch clamping mechanism 300, a welding mechanism 400, and a control mechanism 500. The control mechanism 500 is connected to the positioning mechanism 200, the variable-pitch clamping mechanism 300, and the welding mechanism 400 respectively, to coordinate and control each mechanism to complete automated operations according to a preset process. The operator only needs to complete the loading and unloading operations, and the rest of the welding process is completed automatically by the equipment, which greatly reduces the skill requirements of the operator, avoids the precision errors caused by manual welding, and improves product consistency.

[0028] Reference Figure 2 and Figure 4 The positioning mechanism 200 is disposed on the frame 100. The positioning mechanism 200 includes a positioning seat 210 and a first driving assembly 220. The positioning seat 210 is used to position the substrate 1001, and the first driving assembly 220 is connected to the positioning seat 210. Specifically, the positioning seat 210 includes a base plate 211 and a positioning plate 212. The base plate 211 is disposed on the first driving assembly 220, and the positioning plate 212 is disposed on the base plate 211. The positioning plate 212 is provided with a positioning groove 213, which is adapted to the substrate 1001. During operation, the substrate 1001 is placed in the positioning groove 213 to achieve positioning of the substrate 1001.

[0029] Furthermore, the positioning groove 213 is provided with an adsorption hole 214, and the base plate 211 is provided with a negative pressure channel, which is connected to the adsorption hole 214 and a vacuum adsorption system. During operation, the vacuum adsorption system creates a negative pressure at the adsorption hole 214 through the negative pressure channel, firmly adsorbing and fixing the placed substrate 1001 onto the positioning seat 210, preventing the substrate 1001 from shifting during the welding process, and further improving the positioning accuracy and the stability of the welding process.

[0030] In this embodiment, the positioning plate 212 is detachably mounted on the base plate 211. Specifically, the base plate 211 is provided with a mounting groove 215, a pressure block 216 is slidably mounted on the mounting groove 215, and a spring 217 is provided between the pressure block 216 and the groove wall of the mounting groove 215. The positioning plate 212 is disposed in the mounting groove 215 and is pressed and fixed by the pressure block 216. When it is necessary to process substrates 1001 of different specifications and sizes, the positioning plate 212 of the corresponding specifications can be replaced to adapt to different production needs, without the need to replace the entire positioning mechanism 200, thereby reducing equipment modification costs and improving equipment compatibility.

[0031] The first drive assembly 220 drives the positioning seat 210 to move stepwise along the arrangement direction of the welding areas 1003 at preset step distances, thereby cooperating with the welding mechanism 400 to complete the point-to-point welding operation. Specifically, the first drive assembly 220 can adopt a ball screw transmission module, which has the advantages of high transmission accuracy and good operational stability. It can accurately control the step displacement of the positioning seat 210, ensuring that each welding area 1003 can accurately move to the corresponding working position of the welding mechanism 400, thus guaranteeing welding efficiency and welding quality. Of course, the first drive assembly 220 can also adopt other linear drive structures such as linear motor modules and synchronous belt drive modules to achieve the same function, all of which fall within the protection scope of this application.

[0032] Furthermore, the first drive component 220 can also drive the positioning seat 210 to adjust its lateral position in the direction perpendicular to the arrangement of the welding area 1003, thereby enabling precise positioning of the welding area 1003 and adapting to welding operations of substrates 1001 with different widths, further improving the adaptability of the equipment.

[0033] Reference Figure 5 The variable-pitch clamping mechanism 300 is disposed on the frame 100 and located behind the positioning seat 210 to clamp the wires 1002 and adjust the spacing between the wires 1002. Specifically, the variable-pitch clamping mechanism 300 includes a mounting frame 310, multiple clamping parts 320, and a second drive assembly 330. The mounting frame 310 is disposed on the frame 100, and the multiple clamping parts 320 are slidably arranged on the mounting frame 310. Each of the multiple clamping parts 320 is used to clamp one wire 1002. The second drive assembly 330 is connected to the clamping parts 320 and drives the clamping parts 320 to move to adjust the spacing between the clamping parts 320, so that the wires 1002 on the clamping parts 320 are aligned with the corresponding welding areas 1003, thereby adapting to the production requirements of different welding spacings.

[0034] The clamping part 320 includes a fixed base 321, a clamping cylinder 322, and two clamping blocks 323. The fixed base 321 is slidably disposed on the mounting frame 310. The clamping cylinder 322 is fixedly mounted on the fixed base 321. The two clamping blocks 323 are symmetrically connected to the two output ends of the clamping cylinder 322. The clamping cylinder 322 can drive the two clamping blocks 323 to move synchronously in opposite directions to clamp and fix the end of the wire 1002. The action response is fast and the clamping stability is good. Among them, the clamping blocks 323 adopt an insulating structure with anti-slip teeth, which increases the friction between the clamping blocks 323 and the outer sheath of the wire 1002, preventing the wire 1002 from shifting during the clamping process. At the same time, it prevents the conductivity of the clamping blocks 323 from causing signal interference to the equipment control circuit, thereby improving the operational stability of the equipment. Of course, the two clamping blocks 323 can also adopt a fixed-movement clamping structure, that is, one clamping block 323 is fixed and the other clamping block 323 is pushed by the driving component to complete the clamping action. The structure is simpler and can reduce manufacturing costs, which also falls within the protection scope of this application.

[0035] In this embodiment, the second drive assembly 330 is provided with an independent drive unit for each clamping part 320. Each drive unit can independently drive the corresponding clamping part 320 to make linear displacement adjustment along the arrangement direction of the welding area 1003, thereby flexibly adapting to any unequal spacing distribution of the welding area 1003 layout without the need to change the special clamping fixture. The equipment has stronger adaptability and can meet the rapid production changeover requirements of multi-specification sampling connection plates 1000. In some other embodiments, a linkage pitch-changing mechanism can also be used, in which a single drive component drives multiple clamping parts 320 to make synchronous pitch-changing movements. This can also achieve synchronous adjustment of the spacing between the clamping parts 320, with a simpler structure, lower control difficulty, and reduced equipment manufacturing costs. This also falls within the protection scope of this application.

[0036] Furthermore, the second driving component 330 can also drive the clamping part 320 to move closer to or further away from the substrate 1001, thereby driving all clamping parts 320 to feed synchronously after alignment is completed, so that the end of the wire 1002 to be soldered is precisely abutted against the corresponding soldering area 1003, ensuring that the wire 1002 and the soldering area 1003 are tightly fitted during the soldering process, avoiding defects such as incomplete soldering or detachment due to gaps in the fit, and improving the reliability of the soldered connection. Of course, the height of the clamping part 320 can also be fixed, and then the substrate 1001 can be raised and lowered by the positioning seat 210, which can also achieve tight contact between the wire 1002 and the soldering area 1003, making the structural design more flexible. This application does not impose specific limitations on this.

[0037] Reference Figure 6In some embodiments of this application, the variable-pitch clamping mechanism 300 further includes a wire feeding assembly 340. The wire feeding assembly 340 is disposed on the side of the clamping part 320 away from the positioning seat 210, and is used to feed wire to the clamping part 320. Specifically, the wire feeding assembly 340 includes a wire feeding frame 341, an active wire feeding roller 342, and a driven pressure roller 343. The active wire feeding roller 342 is rotatably mounted on the wire feeding frame 341, and the driven pressure roller 343 is elastically pressed against the upper part of the active wire feeding roller 342. The wire 1002 passes between the active wire feeding roller 342 and the driven pressure roller 343. The active wire feeding roller 342 is connected to a wire feeding motor 344, which can drive the active wire feeding roller 342 to rotate, thereby driving the wire 1002 to move toward or away from the clamping part 320, completing the compensation action of the wire 1002 length.

[0038] When the clamping parts 320 move away from each other to increase the spacing, the length of the wire 1002 between adjacent clamping parts 320 increases, and the wire feeding assembly 340 feeds the wire 1002 of the corresponding length away from the clamping parts 320, so as to prevent the clamping parts 320 from pulling the wire 1002 and causing the wire 1002 to fall off or shift. When the clamping parts 320 move closer to each other to decrease the spacing, the redundant wire 1002 between adjacent clamping parts 320 is retracted by the wire feeding assembly 340, so as to prevent the wire 1002 from slack and bending, affecting the alignment accuracy, ensuring that all wires 1002 are in the correct taut position, and further improving the welding accuracy.

[0039] A pre-processing component 350 is connected upstream of the wire feeding assembly 340 along the conveying direction of the conductor 1002. The pre-processing component 350 is mounted on the frame 100 and is used to continuously process the entire roll of raw conductor 1002, sequentially completing the unwinding, stripping, shaping, tinning, and cutting processes. This eliminates the need for manual processing of the conductor 1002 beforehand, achieving fully automated continuous operation of conductor 1002 processing and welding, significantly reducing labor intensity and improving production efficiency. Specifically, the pre-processing component 350 is sequentially equipped with an unwinding unit 351, a stripping unit 352, a shaping unit 353, a tinning unit 354, and a cutting unit 355 along the conveying direction of the conductor 1002. The unwinding unit 351, stripping unit 352, shaping unit 353, tinning unit 354, and cutting unit 355 are all prior art and will not be described further in this application. During operation, the entire reel of raw conductor 1002 to be processed is first unwound by the unwinding unit 351 and conveyed to the stripping unit 352 to remove the insulation at the ends, exposing the internal metal core wire. Then, the shaping unit 353 flattens and shapes the stripped core wire to keep it straight and regular, facilitating subsequent soldering operations. After shaping, the tinning unit 354 pre-tinsifies the exposed core wire, forming a uniform tin plating layer on the surface of the core wire to prevent oxidation and improve the reliability of subsequent soldering. Finally, the pre-processed conductor 1002 is cut to the set length by the cutting unit 355 and then conveyed to the variable pitch clamping mechanism 300 and clamped and fixed by the clamping part 320. The entire pre-processing process does not require manual intervention, has good processing accuracy and consistency, and high processing efficiency.

[0040] Reference Figure 7 The welding mechanism 400 is mounted on the frame 100 and located above the positioning seat 210 to weld the wires 1002 to the corresponding welding areas 1003. Specifically, the welding mechanism 400 includes N welding heads 410 and a third drive assembly 420, where N is a positive integer less than the number of wires 1002. The N welding heads 410 are arranged along the direction of the welding areas 1003. The third drive assembly 420 is connected to the welding heads 410 and drives the welding heads 410 to move, so that the welding heads 410 correspond one-to-one with the corresponding welding areas 1003. This allows for flexible adaptation to any unequal spacing of the welding areas 1003, making the equipment more adaptable and meeting the rapid production changeover requirements of multi-specification sampling connection boards 1000. By using N welding heads 410 to weld simultaneously, the overall manufacturing cost of the equipment is significantly reduced compared to a full welding head configuration, while maintaining high welding efficiency. This balances the relationship between equipment cost and production efficiency, adapting to the flexible production needs of small to medium batches of multiple specifications.

[0041] The welding head 410 employs a pulsed thermoforming welding head, which minimizes the heat-affected zone during welding, thus preventing damage to the insulating substrate and wiring of the lithium battery pack sampling connection board 1000 caused by high temperatures. This results in high welding strength, good weld consistency, and resistance to detachment over long-term use. Alternatively, a laser welding head or a resistance spot welding head 410 can also be used, both of which can meet the welding connection requirements between the conductor 1002 and the welding area 1003, and all fall within the scope of protection of this application.

[0042] It should be noted that the specific value of N can be set according to the maximum number of welding points on the sampling connection board 1000. When the number of welding points is less than N, the welding output of the corresponding idle welding head 410 can be turned off through the control program without affecting normal production operations.

[0043] It is conceivable that the third drive assembly 420 can adopt the same structure as the second drive assembly 330, that is, an independent drive unit is set for each welding head 410, and each drive unit can drive the corresponding welding head 410 to make linear displacement adjustment along the arrangement direction of the welding area 1003. Alternatively, a linkage pitch-changing mechanism can be used to drive multiple welding heads 410 to complete pitch adjustment synchronously through a single drive component. This can also adapt to the layout of welding areas 1003 with arbitrary unequal spacing. The structural design is flexible and can be flexibly selected according to actual production batch and cost requirements, all of which fall within the protection scope of this application. Furthermore, the third drive assembly 420 can also drive all welding heads 410 to complete lifting and feeding actions synchronously, or drive the substrate 1001 to lift and lower relative to the welding head 410 through the positioning seat 210 to complete the feeding action, thereby realizing the welding operation. The structure is simple, the control is convenient, and the transmission accuracy is high.

[0044] It is easy to understand that there are 2 to 4 welding heads 410. The welding heads 410 are arranged at equal intervals along the arrangement direction of the welding area 1003. The distance between adjacent welding heads 410 is an integer multiple of the distance between adjacent welding areas 1003. In the step-by-step welding process, only one step of the welding head 410 group is needed to complete the welding of the corresponding number of welding points. Compared with the method of welding point by point with a single welding head 410, the welding operation efficiency can be further improved. At the same time, the number of welding heads 410 is less, the equipment manufacturing cost is lower, and the welding efficiency and equipment cost can be better balanced, which is suitable for the needs of mass production.

[0045] In this embodiment, 24 welding areas 1003 are arranged on the substrate 1001, divided into 4 welding groups, each welding group containing 6 welding areas 1003; 4 clamping parts 320 and 4 welding heads 410 are provided, and the 4 clamping parts 320 and 4 welding heads 410 correspond one-to-one with the first welding area 1003 of the 4 welding groups. After the first welding area 1003 of each group is welded, the first driving component 220 drives the positioning seat 210 to move a preset step distance along the arrangement direction of the welding areas 1003, so that the clamping parts 320 and welding heads 410 correspond to the second welding area 1003 of each group and perform welding, until all welding areas 1003 are welded. The aforementioned grouped, step-by-step welding method ensures welding efficiency through simultaneous operation of multiple welding heads 410, while eliminating the need for the same number of welding heads 410 as the welding area 1003. This significantly reduces the number of welding heads 410, effectively lowering the overall equipment procurement and maintenance costs. For products like the sampling connection plate 1000, which are produced in large batches and have varied welding area 1003 specifications, this method offers better economy and adaptability. Furthermore, for welding areas 1003 of different quantities and groups, only the stepping parameters of the first drive component 220 need to be adjusted for production adaptation, without requiring changes to the hardware structure of the welding mechanism 400, making production changeover adjustments convenient and efficient.

[0046] It should be noted that the number of welding zones 1003, the division of welding groups, and the number of clamping parts 320 and welding heads 410 mentioned above are only specific examples of this application. In actual production, the number of welding zones 1003, the grouping method, and the corresponding configuration of clamping parts 320 and welding heads 410 can be flexibly adjusted according to the specific specifications, production batch and precision requirements of the sampling connection plate 1000. All reasonably adjusted technical solutions are within the protection scope of this application.

[0047] Reference Figure 8The control mechanism 500 includes a vision inspection component 510 and a controller 520. The vision inspection component 510 is used to acquire images of the substrate 1001 and confirm the set spacing of the welding areas 1003. The controller 520 is connected to the vision inspection component 510, the first drive component 220, the second drive component 230, and the third drive component 420. During operation, the vision inspection component 510 acquires images of the substrate 1001 and confirms the set spacing of the welding areas 1003. The controller 520 confirms the target spacing between the clamping parts 320 according to the set spacing, and then controls the second drive component 330 and the third drive component 420 to drive the clamping parts 320 and the welding head 410 to move, respectively, so that the wires 1002 and the welding head 410 on the clamping parts 320 are aligned with the corresponding welding areas 1003, thereby achieving adaptive alignment welding. Even if there are slight processing deviations in the position of the welding areas 1003 of different batches of substrates 1001, it can still achieve this. By using visual inspection to correct the alignment position in real time, the welding alignment accuracy is further improved and the defect rate is reduced. Moreover, after the welding head 410 completes the welding of the wire 1002 to the corresponding welding area 1003, the controller 520 controls the first drive component 220 to drive the positioning seat 210 to move step by step along the arrangement direction of the welding area 1003 at a preset step distance, so that the welding head 410 welds the wire 1002 to all welding areas 1003 one by one, thereby completing the entire welding process. The whole process does not require manual intervention, has high processing accuracy, stable cycle time, and can stably output qualified products in batches.

[0048] The visual inspection component 510 includes a CCD camera and / or a laser contour sensor, used to acquire images of the substrate 1001 and identify the edge contour, center coordinates, and domain coordinates of the welding area 1003, thereby confirming the set spacing between the welding areas 1003. The acquired set spacing is then transmitted to the controller 520, which calculates and corrects the alignment deviation. This equipment is designed for the batch welding processing needs of lithium battery pack sampling connection boards 1000, and can adapt to the processing of sampling connection boards 1000 of different sizes and specifications. While ensuring welding accuracy and reliability, it effectively reduces the workload and error probability of manual alignment, significantly improving the welding processing efficiency and finished product qualification rate of lithium battery pack sampling connection boards 1000.

[0049] It is conceivable that the clamping part 320 is equipped with a displacement sensor 324, which is used to monitor the actual position of the clamping part 320 in real time. The displacement sensor 324 is connected to the controller 520. During operation, the displacement sensor 324 feeds back the actual position of the clamping part 320 to the controller 520 in real time. The controller 520 determines whether the target position of the clamping part 320 has been reached based on the actual position. If not, it controls the second drive assembly 330 to drive the clamping part 320 to move until the clamping part 320 reaches the target position. This ensures the positional accuracy of the clamping part 320 after the pitch adjustment, avoids the impact of the transmission system's gap error on the alignment accuracy, further improves the alignment accuracy of the wire 1002 and the welding area 1003, and ensures the stability of the welding quality.

[0050] Reference Figure 9 In some embodiments of this application, the automatic welding equipment for lithium battery pack sampling connection plates further includes a waste gas treatment mechanism 600 for collecting welding fumes generated during the welding process, preventing harmful fumes generated by the volatilization of flux and tin plating layer from spreading into the production workshop, improving the working environment of on-site operators, and meeting the requirements of safe production and occupational health. Specifically, the waste gas treatment mechanism 600 includes a gas collection hood 610, an exhaust pipe 620, and an exhaust fan 630. The gas collection hood 610 is located on the side of the welding mechanism 400, and has a first intake port 611 and a second intake port 612. The first intake port 611 is located on the side of the gas collection hood 610 closest to the welding mechanism 400, and the second intake port 612 is located on the top of the gas collection hood 610. The exhaust pipe 620 is connected to the gas collection hood 610, and the exhaust fan 630 is connected to the exhaust pipe 620. During operation, after the exhaust fan 630 is started, a negative pressure is formed inside the gas collection hood 610. The high-temperature fumes generated during welding rise upwards. Most of the fumes enter the gas collection hood 610 from the first intake port 611 on the side, and a small amount of fumes that rise upwards are replenished from the second intake port 612 at the top. This prevents the fumes from escaping from the side and ensures the coverage of the fumes collection. The collected fumes are transported to the waste gas treatment device through the exhaust pipe 620 for centralized purification before being discharged, thus avoiding harmful gas pollution of the workshop environment and ensuring the occupational health and safety of the operators.

[0051] The automatic welding equipment for lithium battery pack sampling connection plates described in the first aspect of this application uses a variable-pitch clamping mechanism 300 to drive the clamping parts 320 of multiple clamping wires 1002 to adaptively adjust the spacing, which can quickly and accurately align multiple wires 1002 with each welding area 1003 of the substrate 1001, solving the problem of insufficient alignment accuracy of flexible wires 1002 under narrow spacing. It uses N welding heads 410, which are fewer than the total number of wires 1002, to cooperate with the positioning seat 210 to complete point-by-point welding in steps. This not only breaks through the limitation of the physical size of the welding head 410 on welding multiple welding points with narrow spacing, but also greatly improves the welding efficiency compared with welding with a single welding head 410. It can also reduce the local heating time of the substrate 1001 and reduce the risk of heat deformation of the substrate 1001. Finally, a sampling connection plate 1000 with stable welding quality and high alignment accuracy is obtained, which can better meet the requirements of golf cart lithium battery packs for sampling connection reliability.

[0052] Reference Figure 10 The second aspect of this application provides a control method for an automatic welding equipment for a lithium battery pack sampling connection plate, applied to the automatic welding equipment for a lithium battery pack sampling connection plate described in the first aspect of this application. The control method includes: S1: Positioning the substrate 1001 using the positioning mechanism 200; S2: The visual inspection component 510 acquires an image of the substrate 1001 and obtains the set spacing between the soldering areas 1003; S3: Confirm the target spacing between the clamping parts 320 according to the set spacing; S4: According to the target spacing, control the second drive component 330 and the third drive component 420 to drive the clamping part 320 and the welding head 410 to move respectively, so that the wires 1002 and the welding head 410 on the clamping part 320 are aligned with the corresponding welding area 1003. S5: Control the welding mechanism 400 to weld the wire 1002 to the corresponding welding area 1003; The welding mechanism 400 includes N welding heads 410, where N is a positive integer less than the number of wires 1002. Step S5 includes: controlling the first driving component 220 to drive the positioning seat 210 to move step by step along the arrangement direction of the welding area 1003 at a preset step distance, so that the welding area 1003 enters the working area of ​​the welding head 410 in sequence; and controlling the welding head 410 to weld the wires 1002 one by one to the corresponding welding area 1003.

[0053] During operation, the positioning mechanism 200 positions the substrate 1001 to prevent displacement during subsequent alignment and welding processes, ensuring positional stability throughout the welding process. Then, the vision inspection component 510 captures high-resolution images of the substrate 1001 surface and extracts the center coordinates of the welding areas 1003 using an image recognition algorithm. This allows for the calculation of a set distance between adjacent welding areas 1003, which is directly transmitted to the controller 520 as a reference for subsequent alignment adjustments. This allows for real-time compensation for minor processing errors during substrate 1001 production, preventing these errors from being transmitted to the final welding stage. Subsequently, the controller 520 calculates the theoretical position of the clamping part 320 corresponding to each welding area 1003 based on its center coordinates, thus determining the target distance between the clamping parts 320. This provides data for variable distance adjustment, eliminating the need for manual parameter input and allowing direct adaptation to sampling connection plates 1000 with different spacing specifications. No manual adjustment is required during changeover processes. The entire equipment improves production changeover efficiency. Then, based on the target spacing, the second drive assembly 330 and the third drive assembly 420 drive the clamping part 320 and the welding head 410 to move, ensuring that the wires 1002 on the clamping part 320 and the welding head 410 are aligned with the corresponding welding areas 1003. This achieves adaptive alignment welding without manual intervention to adjust alignment parameters, resulting in high alignment accuracy and fast adjustment speed, effectively avoiding errors and inefficiencies caused by manual alignment. After alignment, N welding heads 410 complete the welding action on the welding areas 1003 located in the working area of ​​the welding head 410. Subsequently, the first drive assembly 220 drives the positioning seat 210 to move a preset step distance along the arrangement direction of the welding areas 1003, sending the next group of welding areas 1003 into the working area of ​​the welding head 410. The welding action is repeated until all welding areas 1003 are welded, at which point the processed sampling connection plate 1000 can be unloaded and removed. The entire welding process is automated, with a stable production cycle and good welding accuracy consistency.

[0054] In some embodiments, the clamping part 320 is provided with a displacement sensor 324, which is used to monitor the actual position of the clamping part 320 in real time. Therefore, in step S4, the actual position of the clamping part 320 is first collected in real time by the displacement sensor 324, and then the controller 520 determines whether the actual position has reached the target position of the clamping part 320. If it has not reached the target position, the controller 520 controls the second drive assembly 330 to drive the clamping part 320 to move until the clamping part 320 reaches the target position, ensuring the positional accuracy of the clamping part 320 after the pitch adjustment, avoiding the impact of the gap error of the transmission system on the alignment accuracy, further improving the alignment accuracy of the wire 1002 and the welding area 1003, and ensuring the stability of the welding quality.

[0055] In some embodiments, the variable-pitch clamping mechanism 300 further includes a wire feeding assembly 340, which feeds wires to the clamping portion 320. Therefore, in step S4, during the process of the second driving assembly 330 driving the clamping portion 320 to adjust the spacing, the wire feeding assembly 340 can move synchronously with the position change of the clamping portion 320. When the clamping portions 320 move away from each other to increase the spacing, the length of the wire 1002 between adjacent clamping portions 320 increases, and the wire feeding assembly 340 feeds out a corresponding length of wire 1002 in the direction away from the clamping portion 320, preventing the clamping portion 320 from pulling the wire 1002 and causing it to fall off or shift. When the clamping portions 320 move closer to each other to decrease the spacing, the redundant wire 1002 between adjacent clamping portions 320 is retracted by the wire feeding assembly 340, preventing the wire 1002 from slackening and bending, thus affecting the alignment accuracy and ensuring that all wires 1002 are in the correct taut position, further improving welding accuracy.

[0056] Furthermore, a pre-processing component 350 is connected upstream of the wire feeding assembly 340 along the conveying direction of the conductor 1002. In step S4, before the wire feeding assembly 340 feeds the wire, the conductor 1002 needs to be pre-processed by the conductor 1002 pre-processing component 350. The pre-processing includes, in sequence: unwinding the conductor 1002, stripping the insulation layer from the ends of the conductor 1002, flattening and shaping the core wire after stripping the outer sheath, tinning the flattened core wire, and cutting the conductor 1002 to a set length. The conductor 1002 pre-processing component 350 completes the continuous processing of the entire roll of raw conductor 1002, eliminating the need for operators to manually pre-process the conductor 1002 in advance. This achieves fully automated continuous operation of conductor 1002 processing and welding, significantly reducing manual labor intensity, while ensuring the consistency of the precision of conductor 1002 pre-processing, avoiding the impact of processing errors caused by manual pre-processing on the final welding quality, and effectively improving overall production efficiency.

[0057] It is conceivable that step S5 also includes: continuously absorbing the welding fumes generated during the welding process through the exhaust gas treatment mechanism 600 located on the side of the positioning seat 210. The high-temperature welding fumes are collected under negative pressure and then transported to a centralized purification device for treatment before being discharged, preventing harmful fumes generated by the heat volatilization of flux and tin plating from spreading to the production workshop, ensuring that the on-site production environment meets the requirements for safe production and occupational health, and protecting the occupational health and safety of operators.

[0058] The control method of the automatic welding equipment for lithium battery pack sampling connection board described in the second aspect of this application obtains the set distance between the welding areas 1003 through the vision inspection component 510, which can confirm the target distance between the clamping parts 320. Then, the clamping parts 320 of multiple clamping wires 1002 are driven by the variable-pitch clamping mechanism 300 to adaptively adjust the distance, which can quickly complete the precise alignment of multiple wires 1002 with each welding area 1003 of the substrate 1001, solving the problem of insufficient alignment accuracy of flexible wires 1002 under narrow spacing. The method uses N welding heads 410, which is less than the total number of wires 1002, to cooperate with the positioning seat 210 to complete point-by-point welding in steps. This not only breaks through the limitation of the physical size of the welding head 410 on welding of multiple welding points in narrow spacing, but also greatly improves the welding efficiency compared with welding with a single welding head 410. It can also reduce the local heating time of the substrate 1001 and reduce the risk of heat deformation of the substrate 1001. Finally, a sampling connection board 1000 with stable welding quality and high alignment accuracy is obtained, which can better meet the requirements of golf cart lithium battery packs for sampling connection reliability.

[0059] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An automatic welding device for a lithium battery pack sampling connection plate, wherein the sampling connection plate includes a substrate and wires, the substrate has multiple welding areas arranged thereon, and the wires are welded to each of the welding areas, characterized in that, The automatic welding equipment includes: frame; A positioning mechanism is disposed on the frame. The positioning mechanism includes a positioning seat and a first driving component. The positioning seat is used to position the substrate, and the first driving component is connected to the positioning seat. A variable-pitch clamping mechanism includes a mounting frame, multiple clamping parts, and a second drive assembly. The mounting frame is disposed on the frame, and the multiple clamping parts are slidably arranged on the mounting frame. Each of the multiple clamping parts is used to clamp a wire. The second drive assembly is connected to the clamping parts. A welding mechanism is disposed on the frame and located above the positioning seat. The welding mechanism is used to weld the wire to the corresponding welding area. The welding mechanism includes N welding heads and a third driving component, where N is a positive integer less than the number of wires. The third driving component is connected to the welding heads. The control mechanism includes a vision inspection component and a controller. The vision inspection component is used to acquire images of the substrate and confirm the set spacing of the soldering area. The controller is connected to the vision inspection component, the first driving component, the second driving component, and the third driving component, respectively. The controller is used to determine the target spacing between the clamping parts according to the set spacing, and to control the second drive component and the third drive component to drive the clamping part and the welding head to move respectively, so that the wires on the clamping part and the welding head are aligned with the corresponding welding areas one by one; the controller is also used to control the first drive component to drive the positioning seat to move step by step along the arrangement direction of the welding areas at a preset step distance, so that the welding head welds the wires to the corresponding welding areas one by one.

2. The automatic welding equipment for lithium battery pack sampling connection plates according to claim 1, characterized in that, The clamping part is equipped with a displacement sensor, which is used to monitor the actual position of the clamping part in real time. The displacement sensor is connected to the controller, which is used to determine whether the actual position has reached the target position of the clamping part. If it has not reached the target position, the controller controls the second drive component to drive the clamping part to move until the clamping part reaches the target position.

3. The automatic welding equipment for lithium battery pack sampling connection plates according to claim 1, characterized in that, The variable-pitch clamping mechanism further includes a wire feeding assembly, which is disposed on the side of the clamping part away from the positioning seat, and is used to feed wire to the clamping part.

4. The automatic welding equipment for lithium battery pack sampling connection plates according to claim 3, characterized in that, The wire feeding assembly is connected to a pre-processing assembly, which is disposed on the frame. The pre-processing assembly is used to pre-process the wire and includes an unwinding unit, a stripping unit, a shaping unit, a tinning unit, and a cutting unit arranged sequentially along the wire feeding direction.

5. The automatic welding equipment for lithium battery pack sampling connection plates according to claim 1, characterized in that, The visual inspection component includes a CCD camera and / or a laser contour sensor.

6. The automatic welding equipment for lithium battery pack sampling connection plates according to claim 1, characterized in that, The welding head is provided in two to four parts, and the welding heads are arranged at equal intervals along the arrangement direction of the welding area. The distance between adjacent welding heads is equal to an integer multiple of the distance between adjacent welding areas.

7. The automatic welding equipment for lithium battery pack sampling connection plates according to claim 1, characterized in that, It also includes an exhaust gas treatment mechanism, which includes an exhaust hood, an exhaust pipe, and an exhaust fan. The exhaust hood is located on the side of the welding mechanism and has a first air intake and a second air intake. The first air intake is located on the side of the exhaust hood near the welding mechanism, and the second air intake is located on the top of the exhaust hood. The exhaust pipe is connected to the exhaust hood, and the exhaust fan is connected to the exhaust pipe.

8. A control method for an automatic welding equipment for lithium battery pack sampling connection plates, applied to the automatic welding equipment for lithium battery pack sampling connection plates according to any one of claims 1 to 7, characterized in that, The control method includes: S1: The substrate is positioned by a positioning mechanism; S2: Acquire an image of the substrate using a vision inspection component and obtain the set spacing between the welding areas; S3: Confirm the target spacing between the clamping parts according to the set spacing; S4: According to the target spacing, control the second driving component and the third driving component to drive the clamping part and the welding head to move respectively, so that the wires on the clamping part and the welding head are aligned with the corresponding welding areas one by one; S5: Control the welding mechanism to weld the wire to the corresponding welding area; The welding mechanism includes N welding heads, where N is a positive integer less than the number of wires; step S5 includes: controlling the first driving component to drive the positioning seat to move step by step along the arrangement direction of the welding area at a preset step distance, so that the welding area enters the working area of ​​the welding head in sequence; and controlling the welding head to weld the wires one by one to the corresponding welding area.

9. The control method for the automatic welding equipment for lithium battery pack sampling connection plates according to claim 8, characterized in that, The clamping part is equipped with a displacement sensor, which is used to monitor the actual position of the clamping part in real time; step S4 includes: obtaining the actual position, determining whether the actual position has reached the target position of the clamping part, and if not, controlling the second driving component to drive the clamping part to move until the clamping part reaches the target position, so that the wires on the clamping part are aligned with the corresponding welding areas one by one.

10. The control method for the automatic welding equipment for lithium battery pack sampling connection plates according to claim 8, characterized in that, The variable-pitch clamping mechanism further includes a wire feeding assembly for feeding wires to the clamping part; in step S4, when the first driving assembly drives the clamping part to move to increase the pitch, the wire feeding assembly feeds the wire away from the clamping part; when the first driving assembly drives the clamping part to move to decrease the pitch, the wire feeding assembly retracts the wire towards the clamping part.

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