Ultrasonic welding head and welding equipment

Abstract

The utility model discloses an ultrasonic welding head and welding equipment, the ultrasonic welding head comprises a body, welding teeth and a shaping jig, and the welding teeth are arranged at one end of the body; the shaping jig comprises a telescopic assembly and a shaping piece connected with the telescopic assembly, the telescopic assembly is installed on the body, the shaping piece is annularly arranged on the periphery of the welding tooth, the shaping piece is provided with an avoiding hole for the welding tooth to pass through, and the shaping piece can move in the telescopic direction of the telescopic assembly so that the welding tooth can stretch out or retract from the avoiding hole. According to the ultrasonic welding head, the risk of interference between the welding teeth and the shaping piece can be reduced, the processing efficiency can be improved, the tab welding missing problem is reduced, and the product yield is increased.

Description

Technical Field

[0001] This application relates to the field of ultrasonic welding technology, and in particular to an ultrasonic welding head and welding equipment. Background Technology

[0002] During the manufacturing process of battery devices, the tabs of the battery cells and the adapters need to be welded together using an ultrasonic welding head. The method of shaping the tabs first and then welding them in related technologies poses a risk of interference between the shaping fixture and the welding head, and the process efficiency is low. Utility Model Content

[0003] The main objective of this application is to provide an ultrasonic welding head and welding equipment, which aims to at least improve the technical problems of interference between the shaping fixture and the welding head and low process efficiency during the welding process of the electrode tab and the adapter.

[0004] To achieve the above objectives, according to some embodiments of this application, this application provides an ultrasonic welding head, including a body, welding teeth, and a shaping fixture. The welding teeth are disposed at one end of the body. The shaping fixture includes a telescopic component and a shaping element connected to the telescopic component. The telescopic component is mounted on the body, and the shaping element is arranged around the periphery of the welding teeth. The shaping element is provided with a clearance hole for the welding teeth to pass through. The shaping element can move along the telescopic direction of the telescopic component so that the welding teeth extend or retract from the clearance hole.

[0005] By setting the shaping fixture to include a telescopic component and a shaping component, the shaping component is provided with a clearance hole for the welding tooth to pass through and is arranged around the periphery of the welding tooth. The shaping component can move along the telescopic direction of the telescopic component so that the welding tooth extends or retracts from the clearance hole. This can reduce the risk of interference between the welding tooth and the shaping component, improve process efficiency, reduce electrode tab leakage problems, and improve product yield.

[0006] In some embodiments, the telescopic assembly includes a base and a telescopic member, with both ends of the telescopic member connected to the base and the shaping member respectively. The base is fitted onto the body, and one end of the body extends out of the base. The shaping member is movable along the telescopic direction of the telescopic member, and the welding teeth are disposed at the end of the body that extends out of the base.

[0007] By setting telescopic components to connect to the base and the shaping component respectively, the end connected to the shaping component is a free end, which allows the shaping component to make linear movements of extending or retracting, so that the welding teeth can extend or retract through the clearance hole. When extended, the corresponding welding process facilitates welding of the electrode tabs, and when retracted, it can protect the welding teeth. Moreover, the clearance hole set by the shaping component itself will not interfere with the shaping component.

[0008] In some embodiments, there are multiple telescopic members, which are arranged around the body and each telescopic member extends toward the direction of the welding tooth and is connected to the shaping member.

[0009] By setting multiple shaping components around the main body, the uniformity of force on the shaping components can be improved, keeping the shaping components flat and improving the shaping effect.

[0010] In some embodiments, the shaping member is an annular frame, the clearance hole is the inner hole of the annular frame, and a plurality of the telescopic members are spaced apart on the annular frame.

[0011] By setting the shaping component as a ring frame, the inner hole of the ring frame serves as a clearance hole to avoid interference with the welding teeth. Multiple telescopic components are evenly distributed on the ring frame to ensure that the ring frame is subjected to balanced force, maintaining flatness and contact with the electrode tab.

[0012] In some embodiments, the telescopic member includes a spring, with its two ends connected to the shaping member and the base, respectively.

[0013] By incorporating a telescopic component including a spring, not only is manufacturing easier, but the extension and retraction of the shaping component can also be achieved during the movement of the main body, while also providing a cushioning effect.

[0014] In some embodiments, the telescopic member includes a first link, a spring, and a second link connected in sequence, wherein the end of the first link away from the spring is connected to the shaping member, and the end of the second link away from the spring is connected to the base.

[0015] By setting the telescopic component to include a first link, a spring, and a second link connected in sequence, with the end of the first link away from the spring connected to the shaping component and the end of the second link away from the spring connected to the base, the length of the spring can be reduced. The same effect can be achieved by selecting a spring with a larger elastic modulus, and the risk of spring compression or elongation displacement can be reduced.

[0016] In some embodiments, the base is further provided with a sleeve, which is fitted onto the second connecting rod.

[0017] By setting a sleeve that fits around the outer periphery of the second link, the second link can be positioned to ensure that its installation direction is perpendicular to the base.

[0018] In some embodiments, the telescopic member includes a telescopic cylinder, the telescopic cylinder including a cylinder body and a telescopic rod connected to the cylinder body, the cylinder body being mounted on the base, and the telescopic rod being connected to the shaping member.

[0019] By setting up a telescopic cylinder, the telescopic rod of which is connected to the workpiece, precise control of the time nodes of the forming process can be achieved.

[0020] In some embodiments, the shaping member and the telescopic component are arranged to form a receiving space, the receiving space is connected to the clearance hole, and the ultrasonic welding head includes a welding state and a shaping state.

[0021] When the ultrasonic welding head is in the shaping state, the welding teeth are located within the accommodating space;

[0022] When the ultrasonic welding head is in the welding state, the welding teeth extend from the clearance hole.

[0023] By providing a receiving space, the welding teeth are positioned within this space during the shaping process, which protects them and prevents interference with the shaped component. During the welding process, the welding teeth extend from the clearance hole to weld the electrode tab to the adapter.

[0024] In some embodiments, the shaping fixture further includes a pressure sensor disposed on the side of the shaping member away from the telescopic assembly, the pressure sensor being used to detect the pressure of the shaping member on the workpiece to be processed.

[0025] By setting up a pressure sensor, the pressure sensor can detect the pressure of the workpiece in real time, reducing the risk of the electrode tab cracking during welding due to excessive pressure or deformation.

[0026] In some embodiments, the shaping fixture further includes an image acquisition component, which is used to acquire image information of the workpiece to be processed.

[0027] By setting up an image acquisition device, the state of the tabs on the shaped part can be identified, and the position of the welding teeth can be adjusted according to the position of the tabs to achieve a certain range of tolerance.

[0028] In some embodiments, the base is detachably connected to the body; or, the base and the body are integrally formed.

[0029] By rationally designing the connection between the main body and the base, the advantages of convenient installation and maintenance, or ease of manufacturing, can be achieved.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0033] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0034] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0035] Figure 4 This is a three-dimensional structural schematic diagram of an ultrasonic welding head according to some embodiments of this application;

[0036] Figure 5 This is a schematic diagram of the structure of an ultrasonic welding head according to some embodiments of this application;

[0037] Figure 6 This is a structural schematic diagram of the ultrasonic welding head from another perspective of some embodiments of this application;

[0038] Figure 7 This is a schematic diagram of the structure of a shaping fixture for an ultrasonic welding head according to some embodiments of this application;

[0039] Figure 8 This is another structural schematic diagram of the shaping fixture for the ultrasonic welding head in some embodiments of this application.

[0040] Explanation of icon numbers:

[0041] 1000, vehicles;

[0042] 100. Battery device; 200. Control device; 300. Motor;

[0043] 10. Box body; 11. First part; 12. Second part;

[0044] 20. Battery cell;

[0045] 1. Electrode assembly; 2. End cap; 21. Electrode terminal; 22. Explosion-proof valve; 3. Adapter mechanism; 4. Support structure; 5. Insulating component; 6. Housing;

[0046] 30. Ultrasonic welding head;

[0047] 210. Body; 220. Welding teeth; 230. Shaping fixture; 231. Shaping part; 2311. Annular frame; 232. Clearance hole; 233. Telescopic part; 2331. First connecting rod; 2332. Second connecting rod; 2333. Spring; 2334. Telescopic cylinder; 23341. Cylinder body; 23342. Telescopic rod; 234. Base; 235. Sleeve; 236. Accommodation space; 240. Connecting shaft; 250. Threaded end.

[0048] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, it should be considered that such a combination does not exist and is not within the scope of protection claimed in this application. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0054] The descriptions of directions such as "up", "down", "front", "back", "left", and "right" in this application are based on the directions shown in the figure and are only used to explain the relative positional relationship between the components in the posture shown in the figure. If the specific posture changes, the directional indication will also change accordingly.

[0055] In the manufacturing process of battery devices, ultrasonic waves are used to connect the tabs of the battery cells to the adapters. This connection includes welding and shaping processes. The applicant has found that the connection process between the tabs and the adapters in related technologies is very inefficient. Specifically, the conventional process involves first shaping the tabs together using a shaping fixture, and then welding them using an ultrasonic welding head. To improve process efficiency, the interval between the shaping and welding processes needs to be shortened, which can easily lead to interference on the production line, i.e., the shaping fixture colliding with the ultrasonic welding head. Furthermore, if the shaped tabs shrink or curl, it can easily lead to incomplete welding of the tabs.

[0056] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The electrical equipment can be the vehicle 1000, which can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a control device 200 and a motor 300. The control device 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0057] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a cavity for the battery cell 20, and can employ various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a cavity for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the cavity; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0059] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0060] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0061] Reference Figure 3 The battery cell 20 refers to the smallest unit that makes up the battery device 100. The battery cell 20 includes an end cap 2, a housing 6, an electrode assembly 1, a connecting mechanism 3, a support structure 4, and other functional components.

[0062] The outer casing 6 is a hollow structure with an opening on one side. The end cap 2 is a component that covers the opening of the outer casing 6 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 2 can be adapted to the shape of the outer casing 6 to fit it. Optionally, the end cap 2 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 2 is less prone to deformation under pressure and impact, allowing the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 21 and explosion-proof valves 22 can be provided on the end cap 2. The electrode terminals 21 can be electrically connected to the electrode assembly 1 through the adapter mechanism 3 for outputting or inputting electrical energy into the battery cell 20. In some embodiments, the end cap 2 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 2 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this.

[0063] In some embodiments, an insulating element 5 (lower plastic) may be provided on the inner side of the end cap 2. The insulating element 5 can be used to isolate the electrical connection components inside the housing 6 from the end cap 2 to reduce the risk of short circuit. The insulating element 5 may be provided with multiple hot-melt points, which are arranged at intervals along the circumference of the insulating element 5. The battery cell 20 may also include an insulating film, which is bonded to the hot-melt points by a hot-melt process to assemble the electrode assembly 1, the end cap 2, and the insulating film together. After the electrode assembly 1, the end cap 2, and the insulating film are assembled, they are then installed into the housing 6 together, which facilitates assembly. For example, the insulating element 5 may be a plastic part, a rubber part, etc.

[0064] The outer casing 6 is a component used to cooperate with the end cap 2 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 1, the insulating component 5, the electrolyte, and other components. The outer casing 6 and the end cap 2 can be independent components. An opening can be provided on the outer casing 6, and the end cap 2 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 2 and the outer casing 6 can be integrated. Specifically, the end cap 2 and the outer casing 6 can form a common connecting surface before other components are inserted into the casing. When it is necessary to encapsulate the interior of the outer casing 6, the end cap 2 closes the outer casing 6. The outer casing 6 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the outer casing 6 can be determined according to the specific shape and size of the electrode assembly 1. The material of the outer casing 6 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0065] Electrode assembly 1 is the component in the battery cell 20 where electrochemical reactions occur. Electrode assembly 1 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of electrode assembly 1, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs can be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging process of the battery cell 20, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals 21 via the adapter mechanism 3 to form a current loop.

[0066] Reference Figures 4-6 According to some embodiments of this application, this application provides an ultrasonic welding head 30, including a body 210, welding teeth 220 and a shaping fixture 230. The welding teeth 220 are disposed at one end of the body 210. The shaping fixture 230 includes a telescopic component and a shaping member 231 connected to the telescopic component. The telescopic component is installed on the body 210. The shaping member 231 is arranged around the periphery of the welding teeth 220. The shaping member 231 is provided with a clearance hole 232 for the welding teeth 220 to pass through. The shaping member 231 can move along the telescopic direction of the telescopic component so that the welding teeth 220 extend or retract from the clearance hole 232.

[0067] The body 210 refers to the main body of the ultrasonic welding head 30. The welding teeth 220 are the parts used to contact and weld with the workpiece to be processed. Here, the workpiece to be processed refers to the electrode tab, or the electrode tab and the adapter. The welding teeth 220 generate a weld to weld the electrode tab and the adapter together. The shaping fixture 230 is used to shape the electrode tab or the electrode tab and the adapter. The shaping process is a necessary process before the welding process. In the above embodiments of this application, the shaping fixture 230 includes a telescopic component and a shaping component 231. The shaping component 231 is used to contact and abut with the electrode tab to shape it. One end of the telescopic component is mounted on the body 210, and the other end is connected to the shaping component 231, so that the shaping component 231 can extend and retract in the telescopic direction of the telescopic component. For example, when the shaping component 231 abuts with the electrode tab, if the body 210 continues to move downward so that the welding teeth 220 contact the workpiece to be processed, the telescopic component will be compressed under the push of the shaping component 231. When welding is not required, or when the shaping part 231 is not in contact with the workpiece, the telescopic component can return to its original position, allowing the shaping part 231 to extend along the telescopic direction. At this time, since the shaping part 231 is arranged around the welding tooth 220 and has a clearance hole 232 for the welding tooth 220 to pass through, firstly, when the shaping part 231 extends or retracts, the welding tooth 220 can pass through the clearance hole 232 without interfering with the telescopic component. Secondly, when welding is not required, the shaping part 231 can protect the welding tooth 220 on the outer periphery of the welding tooth 220 without interference.

[0068] Furthermore, in the embodiments of this application, the shaping fixture 230 and the welding teeth 220 are arranged together. During the movement of the body 210 toward the workpiece, the welding teeth 220 and the shaping fixture 230 also move toward the workpiece. The shaping fixture 230 first contacts the electrode tab to shape it. After the shaping is completed, the shaped part 231 retracts to expose the welding teeth 220. The welding teeth 220 contact the workpiece to weld it, which is equivalent to performing the shaping process simultaneously in the pre-welding preparation process (the body 210 moves toward the workpiece). The embodiments of this application have at least the following advantages: 1. The interval between the shaping process and the welding process is very short, or they may overlap in some parts. The shaping process is completed together with the preparation part of the welding process, that is, it is completed together when the welding teeth 220 move toward the workpiece. By integrating the shaping process and the welding process together, the interval between the two processes is reduced, which greatly improves the process efficiency. Furthermore, since welding is performed immediately after shaping, and the shaped part 231 can still contact the tab during welding, the risk of shrinkage or warping of the shaped tab before welding is reduced, thus reducing the occurrence of tab leakage welding problems.

[0069] By setting the shaping fixture 230 to include a telescopic component and a shaping component 231, the shaping component 231 is provided with a clearance hole 232 for the welding tooth 220 to pass through and is arranged around the periphery of the welding tooth 220. The shaping component 231 can move along the telescopic direction of the telescopic component so that the welding tooth 220 extends or retracts from the clearance hole 232. This can reduce the risk of interference between the welding tooth 220 and the shaping component 231, improve process efficiency, reduce electrode tab leakage problems, and improve product yield.

[0070] Reference Figure 4 and Figure 5 In some embodiments, the telescopic component includes a base 234 and a telescopic member 233. The two ends of the telescopic member 233 are connected to the base 234 and the shaping member 231, respectively. The base 234 is fitted onto the body 210, and one end of the body 210 extends out of the base 234. The shaping member 231 can move along the telescopic direction of the telescopic member 233. Welding teeth 220 are disposed at the end of the body 210 that extends out of the base 234.

[0071] The telescopic component 233 can extend and retract along its central axis, allowing the shaping component 231 to move and enabling the welding teeth 220 to extend out of or retract through the clearance hole 232. The base 234 is fitted onto the body 210, specifically onto its outer circumferential surface. This connection can be fixed or detachable, but once installed, its position remains unchanged without disassembly. The base 234 provides a connection and support point for the telescopic component 233. The connection between the telescopic component 233 and the base 234 is the fixed end, while the connection to the shaping component 231 is the movable end, allowing the shaping component 231 to move along the telescopic direction of the telescopic component 233. One end of the body 210 extends beyond the base 234, and the welding teeth 220 are positioned on the extended portion of the body 210.

[0072] By setting the telescopic component 233 to be connected to the base 234 and the shaping component 231 respectively, and the end connected to the shaping component 231 is a free end, the shaping component 231 can make linear movements of extending or retracting, so that the welding tooth 220 can extend or retract through the clearance hole 232. When extended, the corresponding welding process is convenient for welding the electrode tab, and when retracted, it can protect the welding tooth 220. Moreover, through the clearance hole 232 set by the shaping component 231 itself, the welding tooth 220 will not interfere with the shaping component 231.

[0073] Reference Figure 4 In some embodiments, there are multiple telescopic members 233, which are arranged around the body 210, and each telescopic member 233 extends toward the direction of the welding tooth 220 and is connected to the shaping member 231.

[0074] Multiple can be at least two, for example, it can be two, three, or four. Figure 4 Four are shown in the figure. Those skilled in the art can reasonably select the number of telescopic components 233 according to actual needs; this application does not impose specific limitations on this. Multiple telescopic components 233 are arranged parallel to each other, and each telescopic component 233 extends from the body 210 towards the welding tooth 220 to connect with the shaping component 231. Setting multiple telescopic components 233 increases the telescopic force and restricts the extension or retraction of the shaping component 231 from multiple points, improving the uniformity of force on the shaping component 231, reducing the risk of uneven shaping surface due to uneven force, and improving the shaping effect. The shaping surface refers to the side of the shaping component 231 facing the electrode tab. Specifically, the multiple telescopic components 233 are evenly distributed on the shaping component 231.

[0075] By setting multiple shaping components 231 around the body 210, the uniformity of force on the shaping components 231 can be improved, so that the shaping components 231 remain flat and the shaping effect is improved.

[0076] Reference Figure 4 In some embodiments, the shaping member 231 is an annular frame 2311, the clearance hole 232 is the inner hole of the annular frame 2311, and multiple telescopic members 233 are distributed at intervals on the annular frame 2311.

[0077] The annular frame 2311 here can be a square frame, a circular frame, or a frame of other shapes. The inner hole of the annular frame 2311 is the clearance hole 232. The frame part of the annular frame 2311 is used to abut against the electrode tab and shape it. After shaping, the welding teeth 220 pass through the clearance hole 232, that is, through the middle of the annular frame 2311 to weld the electrode tab and the adapter. Since it passes through the clearance hole 232 in the middle of the annular frame 2311, it will not interfere with or collide with the frame part of the annular frame 2311. The multiple telescopic members 233 are evenly distributed on the annular frame 2311 to ensure that the annular frame 2311 is subjected to uniform force and reduce the risk of unevenness of the annular frame 2311. Specifically, when the annular frame 2311 is a square frame, the number of telescopic members 233 can be four, and the four telescopic members 233 are respectively set at the four top corners of the square frame.

[0078] By setting the shaping component 231 as an annular frame 2311, the inner hole of the annular frame 2311 serves as a clearance hole 232 to avoid interference with the welding teeth 220. Multiple telescopic components 233 are evenly distributed on the annular frame 2311, so that the annular frame 2311 is subjected to balanced force and remains flat and in contact with the electrode tab.

[0079] In some embodiments, the telescopic member 233 includes a spring 2333, with the two ends of the spring 2333 connected to the shaping member 231 and the base 234, respectively.

[0080] The telescopic component 233 can be a spring 2333. The spring 2333 has an elastic modulus. When the shaping component 231 abuts against the electrode tab, it can shape the electrode tab. As the body 210 moves downward, the pressure between the shaping component 231 and the electrode tab increases, causing the spring 2333 to compress. The shaping component 231 moves towards the base 234 and retracts, exposing the welding teeth 220. The electrode tab and the adapter are welded through the welding teeth 220. After welding, the shaping component 231 separates from the electrode tab. Under the restoring force of the spring 2333, the shaping component 231 extends, so that the welding teeth 220 are enclosed within the receiving space 236 formed by the shaping fixture 230, which protects the welding teeth 220. Furthermore, the spring 2333 also acts as a buffer, preventing excessive pressure from the shaping component 231 on the electrode tab, which could damage the electrode tab or cause it to warp.

[0081] By setting the telescopic component 233, including the spring 2333, it is not only easy to manufacture, but also allows the shaping component 231 to extend and retract during the movement of the main body 210, while also playing a buffering role.

[0082] Reference Figure 7 In some embodiments, the telescopic member 233 includes a first link 2331, a spring 2333, and a second link 2332 connected in sequence. The end of the first link 2331 away from the spring 2333 is connected to the shaping member 231, and the end of the second link 2332 away from the spring 2333 is connected to the base 234.

[0083] Both the first link 2331 and the second link 2332 are circular rods. If the spring 2333 is too long, it may shift during compression or extension, potentially causing uneven force on the shaping component 231 and resulting in tilting. Therefore, the first link 2331 and the second link 2332 can be connected to the two ends of the spring 2333 respectively. The first link 2331 is connected to the shaping component 231, and the second link 2332 is connected to the base 234. This reduces the length of the spring 2333. Compared to using the spring 2333 as the entire component, this embodiment can use springs 2333 with different elastic moduli to achieve the same effect and reduce the risk of shifting during compression or extension of the spring 2333.

[0084] By setting the telescopic component 233, which includes a first connecting rod 2331, a spring 2333, and a second connecting rod 2332 connected in sequence, the end of the first connecting rod 2331 away from the spring 2333 is connected to the shaping component 231, and the end of the second connecting rod 2332 away from the spring 2333 is connected to the base 234, the length of the spring 2333 can be reduced. By selecting a spring 2333 with a larger elastic modulus, the same effect can be achieved, and the risk of the spring 2333 shifting due to compression or elongation can be reduced.

[0085] Reference Figure 7 In some embodiments, a sleeve 235 is also provided on the base 234, and the sleeve 235 is fitted onto the second connecting rod 2332. The second connecting rod 2332 can be movably installed on the sleeve 235 or fixedly installed on the sleeve 235. The central axis of the sleeve 235 is concentric with the central axis of the second connecting rod 2332. The sleeve 235 is installed perpendicular to the base 234, and the sleeve 235 can serve a positioning function. For example, if the sleeve 235 is provided on the base 234, and then the second connecting rod 2332 is installed inside the sleeve 235, it can be ensured that the installation direction of the second connecting rod 2332 is perpendicular to the base 234.

[0086] By setting a sleeve 235, which is fitted onto the outer periphery of the second connecting rod 2332, the second connecting rod 2332 can be positioned to ensure that the installation direction of the second connecting rod 2332 is perpendicular to the base 234.

[0087] Reference Figure 8 In some embodiments, the telescopic member 233 includes a telescopic cylinder 2334, which includes a cylinder body 23341 and a telescopic rod 23342 connected to the cylinder body 23341. The cylinder body 23341 is mounted on the base 234, and the telescopic rod 23342 is connected to the shaping member 231.

[0088] The cylinder 23341 drives the telescopic rod 23342 to extend or retract. When extending, it extends towards the workpiece, and when retracting, it retracts towards the body 210. Specifically, the cylinder 23341 is fixedly mounted on the base 234. One end of the telescopic rod 23342 is mounted on the cylinder 23341, and the other end is connected to the shaping part 231. The cylinder 23341 drives the telescopic rod 23342 to move, thereby driving the shaping part 231 to extend or retract. It should be noted that the connection between the telescopic cylinder 2334 and the shaping part 231 is rigid, allowing for very precise control over the timing of the extension or retraction of the shaping part 231. Specifically, after the shaping part 231 contacts the electrode tab, the telescopic cylinder 2334 does not retract until the shaping process is complete. The telescopic cylinder 2334 and the shaping part 231 are rigidly connected, ensuring the shaping part 231 remains in contact with the electrode tab during shaping without retracting due to pressure. This allows for more precise shaping. When welding is required after shaping, the telescopic cylinder 2334 can drive the shaping part 231 to retract, and the retraction position can be precisely controlled. Furthermore, by using the telescopic cylinder 2334, the telescopic rod 23342 only moves under the drive of the cylinder body 23341, preventing retraction of the shaping part 231 due to excessive force, resulting in better shaping performance.

[0089] By setting up a telescopic cylinder 2334, and connecting the telescopic rod 23342 of the telescopic cylinder 2334 to the shaping part 231, precise control of the time nodes of the shaping process can be achieved.

[0090] In some embodiments, the shaping member 231 and the telescopic component are arranged to form a receiving space 236, the receiving space 236 is connected to the clearance hole 232, and the ultrasonic welding head 30 includes a welding state and a shaping state.

[0091] When the ultrasonic welding head 30 is in the shaping state, the welding teeth 220 are located in the accommodating space 236;

[0092] When the ultrasonic welding head 30 is in the welding state, the welding teeth 220 extend out from the clearance hole 232.

[0093] The shaping component 231 and the telescopic component 233 cooperate to form a non-enclosed but enclosing receiving space 236 that can surround the welding tooth 220. The welding tooth 220 being located within the receiving space 236 reduces the risk of collision with other components. Simultaneously, the clearance hole 232 communicates with the receiving space 236, allowing the welding tooth 220 to extend or retract from it. The welding tooth 220 passing through the clearance hole 232 will not interfere with or collide with the annular frame 2311 of the shaping component 231. When the ultrasonic welding head 30 is in the shaping state, the shaping component 231 is primarily used to shape the electrode tabs; the welding tooth 220 is not required to operate. To avoid the welding tooth 220 affecting the shaping process, it is positioned within the receiving space 236, preventing it from touching the electrode tabs or the shaping component 231. When welding is required, the body 210 continues to press down toward the tab, the shaping part 231 retracts under the action of the telescopic component, and the welding teeth 220 move outward relative to the shaping part 231 to extend out of the clearance hole 232. The welding teeth 220 expose the shaping part 231 to contact the tab, and welding begins on the tab and the adapter.

[0094] By providing a receiving space 236, when in the shaping state, the welding teeth 220 are located within the receiving space 236, which not only protects the welding teeth 220 but also prevents interference with the shaping component 231. When in the welding state, the welding teeth 220 extend from the clearance hole 232 to weld the electrode tab to the adapter.

[0095] In some embodiments, the shaping fixture 230 further includes a pressure sensor disposed on the side of the shaping member 231 away from the telescopic assembly, and the pressure sensor is used to detect the pressure of the shaping member 231 on the workpiece to be processed.

[0096] A pressure sensor is used to detect pressure. Specifically, if the pressure of the shaping component 231 on the tab is too high or the shaping is excessive, the tab is prone to cracking during welding. Therefore, to control the pressure of the shaping component 231 on the tab, a pressure sensor is installed on the side of the shaping component 231 away from the telescopic assembly, that is, the side facing the tab. The pressure sensor can detect the pressure of the tab on the shaping component 231, which, according to the principle of action and reaction, is the pressure experienced by the tab. The pressure sensor is used to connect to the controller signal of an external device. The controller can receive the pressure information sent by the pressure sensor. When the pressure value in the pressure information exceeds a preset value, the controller will issue an alarm and simultaneously control the drive component connected to the main body 210 to stop pressing down or move upward to separate from the tab, reducing the risk of the tab cracking due to excessive pressure or excessive shaping.

[0097] By setting up a pressure sensor, the pressure sensor can detect the pressure of the workpiece (tab) in real time, reducing the risk of the tab cracking during welding due to excessive pressure or deformation.

[0098] In some embodiments, the shaping fixture 230 further includes an image acquisition unit for acquiring image information of the workpiece to be processed.

[0099] The shaping fixture 230 can be equipped with an intelligent recognition function. This involves installing an image acquisition device on the fixture 230 to identify the state of the electrode tabs before shaping. The image acquisition device can be a camera or a webcam, used to acquire image information of the workpiece to be processed. This information includes images of the electrode tabs and the adapter. From the image information, it can be determined whether the electrode tabs are misaligned. If there is misalignment but it is within the allowable range, the position of the welding teeth 220 is adjusted appropriately to facilitate welding the electrode tabs and the adapter. If the electrode tabs are set slightly to the left relative to the preset position but within the allowable range, the welding teeth 220 are moved slightly to the left to reduce the difference caused by the electrode tab offset.

[0100] By setting up an image acquisition device, the state of the tabs of the shaping part 231 can be identified, and the position of the welding teeth 220 can be adjusted according to the position of the tabs to achieve a certain range of tolerance.

[0101] In some embodiments, the base 234 is detachably connected to the body 210; or, the base 234 and the body 210 are integrally formed. (Refer to...) Figure 4 In other embodiments, the ultrasonic welding head 30 further includes a connecting shaft 240 and a threaded end 250, the threaded end 250 being used to connect with an external drive, and the connecting shaft 240 being used to connect the body 210 and the external drive.

[0102] The detachable connection means that the body 210 and the base 234 can be separated, meaning that the shaping jig 230 can be independently disassembled and installed from the body 210, improving the convenience of installation and disassembly and facilitating maintenance. The detachable connection can be achieved through snap-fit ​​fixing or bolt connection. Alternatively, the base 234 and the body 210 can be integrally molded, which is more convenient and increases manufacturing efficiency.

[0103] By rationally setting the connection method between the main body 210 and the base 234, the advantages of convenient installation and maintenance, or convenient manufacturing can be achieved.

[0104] According to some embodiments of this application, this application provides an ultrasonic welding head 30, including a body 210, welding teeth 220 and a shaping fixture 230. The welding teeth 220 are disposed at one end of the body 210. The shaping fixture 230 includes a telescopic component and a shaping component 231. The telescopic component includes a base 234 and a telescopic component 233. The two ends of the telescopic component 233 are respectively connected to the base 234 and the shaping component 231. The base 234 is fitted onto the body 210, and one end of the body 210 extends out of the base 234. The shaping component 231 is arranged around the welding teeth 220. The shaping component 231 is provided with a clearance hole 232 for the welding teeth 220 to pass through. The welding teeth 220 are disposed at the end of the body 210 that extends out of the base 234. The shaping component 231 can move along the telescopic direction of the telescopic component 233 so that the welding teeth 220 extend out of or retract from the clearance hole 232. The shaping component 231 is an annular frame 2311, the clearance hole 232 is the inner hole of the annular frame 2311, and there are multiple telescopic components 233. The multiple telescopic components 233 are arranged around the body 210 and are spaced apart on the annular frame 2311. Each telescopic component 233 extends towards the direction of the welding tooth 220 and is connected to the shaping component 231. Specifically, the shaping component 231 and the telescopic component form a receiving space 236, which is connected to the clearance hole 232. The ultrasonic welding head 30 includes a welding state and a shaping state. When the ultrasonic welding head 30 is in the shaping state, the welding tooth 220 is located in the receiving space 236. When the ultrasonic welding head 30 is in the welding state, the welding tooth 220 extends out from the clearance hole 232.

[0105] Regarding the specific form of the telescopic component 233, at least the following three types are possible: First, the telescopic component 233 may include a spring 2333, with both ends of the spring 2333 connected to the shaping component 231 and the base 234, respectively. Second, the telescopic component 233 may include a first connecting rod 2331, a spring 2333, and a second connecting rod 2332 connected in sequence. The end of the first connecting rod 2331 away from the spring 2333 is connected to the shaping component 231, and the end of the second connecting rod 2332 away from the spring 2333 is connected to the base 234. Third, the telescopic component 233 may include a telescopic cylinder 2334, which includes a cylinder body 23341 and a telescopic rod 23342 connected to the cylinder body 23341. The cylinder body 23341 is mounted on the base 234, and the telescopic rod 23342 is connected to the shaping component 231. The shaping fixture 230 also includes a pressure sensor and an image acquisition unit. The pressure sensor is located on the side of the shaping part 231 opposite to the telescopic assembly. The pressure sensor is used to detect the pressure of the shaping part 231 on the workpiece to be processed. The image acquisition unit is used to acquire image information of the workpiece to be processed. This ultrasonic welding head 30 can reduce the risk of interference between the welding teeth 220 and the shaping part 231, and can improve process efficiency, reduce electrode tab leakage problems, and improve product yield.

[0106] According to some embodiments of this application, this application provides a welding device, which includes a drive unit and the aforementioned ultrasonic welding head 30. The drive unit is used to drive the ultrasonic welding head 30 to move. Specifically, the drive unit is used to connect to the body 210. The drive unit can be a robot, capable of moving the shaping fixture 230 and welding teeth 220 to the required location via the body 210, thereby achieving automated operation of the welding device. The welding device may also include a controller, which is connected to the drive unit, pressure sensor, image acquisition unit, etc. Since the welding device includes any of the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by any of the above technical solutions, which will not be elaborated here.

[0107] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An ultrasonic welding head, characterized in that, include: ontology; Welding teeth are provided at one end of the body; A shaping fixture includes a telescopic assembly and a shaping component connected to the telescopic assembly. The telescopic assembly is mounted on the body, and the shaping component is arranged around the periphery of the welding tooth. The shaping component is provided with a clearance hole for the welding tooth to pass through. The shaping component can move along the telescopic direction of the telescopic assembly so that the welding tooth extends out or retracts from the clearance hole.

2. The ultrasonic welding head as described in claim 1, characterized in that, The telescopic assembly includes a base and a telescopic member. The two ends of the telescopic member are connected to the base and the shaping member, respectively. The base is fitted onto the body, and one end of the body extends out of the base. The shaping member can move along the telescopic direction of the telescopic member. The welding teeth are provided at the end of the body that extends out of the base.

3. The ultrasonic welding head as described in claim 2, characterized in that, The number of telescopic components is multiple, and the multiple telescopic components are arranged around the body, with each telescopic component extending toward the direction of the welding tooth and connected to the shaping component.

4. The ultrasonic welding head as described in claim 2, characterized in that, The shaping component is an annular frame, the clearance hole is the inner hole of the annular frame, and multiple telescopic components are distributed at intervals on the annular frame.

5. The ultrasonic welding head as described in claim 2, characterized in that, The telescopic component includes a spring, with its two ends connected to the shaping component and the base, respectively.

6. The ultrasonic welding head as described in claim 2, characterized in that, The telescopic component includes a first connecting rod, a spring, and a second connecting rod connected in sequence. The end of the first connecting rod away from the spring is connected to the shaping component, and the end of the second connecting rod away from the spring is connected to the base.

7. The ultrasonic welding head as described in claim 6, characterized in that, The base is also provided with a sleeve, which is fitted onto the second connecting rod.

8. The ultrasonic welding head as described in claim 2, characterized in that, The telescopic component includes a telescopic cylinder, which includes a cylinder body and a telescopic rod connected to the cylinder body. The cylinder body is mounted on the base, and the telescopic rod is connected to the shaping component.

9. The ultrasonic welding head as described in any one of claims 1 to 8, characterized in that, The shaping component and the telescopic component are arranged to form a receiving space, the receiving space is connected to the clearance hole, and the ultrasonic welding head includes a welding state and a shaping state. When the ultrasonic welding head is in the shaping state, the welding teeth are located within the accommodating space; When the ultrasonic welding head is in the welding state, the welding teeth extend from the clearance hole.

10. The ultrasonic welding head as described in any one of claims 1 to 8, characterized in that, The shaping fixture also includes a pressure sensor, which is disposed on the side of the shaping part away from the telescopic assembly. The pressure sensor is used to detect the pressure of the shaping part on the workpiece to be processed.

11. The ultrasonic welding head as described in any one of claims 1 to 8, characterized in that, The shaping fixture also includes an image acquisition component, which is used to acquire image information of the workpiece to be processed.

12. The ultrasonic welding head as described in any one of claims 2 to 8, characterized in that, The base is detachably connected to the body; or the base and the body are integrally molded parts.

13. A welding device, characterized in that, The welding equipment includes a drive unit and an ultrasonic welding head according to any one of claims 1 to 12, wherein the drive unit is used to drive the ultrasonic welding head to move.

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