A laser welding device for capacitor terminals to aluminum foil in contact.

Abstract

This invention relates to the field of capacitor processing technology, specifically to a laser welding device for capacitor terminals and aluminum foil in contact, comprising a main body; a mating interface is provided on one side of the main body, and a limiting frame is provided on the top of the main body near the mating interface; a welding unit, the welding unit including a mounting shell slidably connected to the mating interface, mounting cavities being provided on both sides of the bottom of the mounting shell, a connecting seat being provided on the top of the inner side of the mounting cavity, and a swing frame with a pressure roller rotatably mounted on one end being hinged to the outer wall of the connecting seat; a connecting frame is provided on the top of the mounting shell, which slidably engages with the limiting frame, and a pressure block is slidably mounted in the connecting frame. This invention, through the coordinated operation of various components, solves the problems of blind spots and heat-induced warping in welding large-volume capacitor terminals and wide-width aluminum foil, improving welding quality and mass production efficiency, achieving precise positioning, stable welding, and rapid component reset, and adapting to high-reliability mass production requirements.

Description

Technical Field

[0001] This invention relates to the field of capacitor processing technology, and in particular to a laser welding device for capacitor terminals to contact aluminum foil. Background Technology

[0002] Large-volume, high-capacity capacitors are core energy storage components in power electronic systems across multiple fields. As downstream applications continue to demand higher current carrying capacity, lower equivalent series resistance, higher ripple current tolerance, and longer service life for devices, the welding quality of the leads and wide-width electrode aluminum foil of these large-volume capacitors has become a key process that restricts the upper limit of product performance and mass production yield.

[0003] Currently, high-end production lines for these large-volume capacitors are gradually adopting laser welding to replace traditional ultrasonic welding and riveting processes. The tight, seamless bonding and compression between the large-size welding surface of the terminal and the wide aluminum foil is a core prerequisite for welding quality. Existing mass production technologies generally use a ring-shaped pressure head with a fixed through-hole in the center for bonding and compression. This solution has inherent contradictions that cannot be overcome when adapting to the large-size welding surfaces of large-volume capacitors, and its defects are amplified dramatically: to avoid the laser beam path, the core welding area in the center of the pressure head has no pressure, forming a permanent bonding blind zone. The larger the welding surface, the wider the bonding blind zone, easily leading to fatal defects such as incomplete soldering, cratering, and porosity. Simultaneously, the pressure distribution is severely uneven, easily resulting in the dilemma of over-pressure damaging the aluminum foil at the edges and under-pressure causing poor bonding in a large central area for large-size welding surfaces. During welding, the unconstrained large-size central area experiences more severe heat warping and deformation, further drastically expanding the bonding gap, resulting in extremely poor consistency in long-stroke continuous welding, making it completely unsuitable for the mass production requirements of high-reliability scenarios such as new energy and rail transportation. Summary of the Invention

[0004] This invention provides a laser welding device for capacitor terminals and aluminum foil in contact, to solve the problems mentioned in the background art, such as the large blind area between the terminals of large-volume capacitors and the wide aluminum foil, which easily leads to poor welding, explosions, and porosity, or the large central area warping due to heat during welding and the rapid expansion of the bonding gap, making it unsuitable for continuous welding of large welding surfaces.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a laser welding device for contact welding of capacitor terminals and aluminum foil, comprising a main body; A connection interface is provided on one side of the main body, and a limit frame is provided on the top of the main body near the connection interface. The welding unit includes a mounting shell that is slidably connected to the docking interface. The mounting shell has mounting cavities on both sides of its bottom. A connecting seat is provided on the top of the inner side of the mounting cavity. A swing frame with a pressure roller rotatably mounted on one end is hinged to the outer wall of the connecting seat. The top of the mounting shell is provided with a connecting frame that slides with the limiting frame. A pressure block is slidably installed inside the connecting frame. A pushing component with one end connected to the limiting frame is provided on the top of the pressure block. A pressing assembly is slidably connected inside the mounting housing. The pressing assembly includes a sliding frame slidably installed inside the mounting housing. One end of the sliding frame has a docking cavity. A pressure plate is slidably installed at the bottom of the docking cavity. A bearing frame is provided near the top of the docking cavity. A welding assembly is slidably installed inside the bearing frame.

[0006] The present invention is further configured such that the swing frame is inclined, and an elastic element with one end connected to the mounting cavity is provided on one side of the swing frame.

[0007] The present invention is further configured such that symmetrical docking grooves are opened on both sides of the connecting frame, a limiting slider is provided on the outer wall of the pressure block, the limiting slider is locked inside the docking groove and slidably connected, and an extrusion surface is opened at the bottom of the pressure block.

[0008] The present invention is further configured such that an elastic element three is provided on one side of the sliding frame and one end is connected to the mounting shell, and a limiting groove one and a limiting groove two are symmetrically opened inside the mounting shell, and a limiting strip one and a limiting strip two are correspondingly provided on the outer wall of the sliding frame, and the limiting strip one and the limiting strip two are slidably connected to the limiting groove one and the limiting groove two, respectively.

[0009] The present invention is further configured such that a limiting plate is provided inside the docking cavity, and docking interfaces three are symmetrically opened on both sides of the pressure plate, the limiting plate passes through the docking interfaces three, and an elastic element two is provided between the bottom of the limiting plate and the pressure plate.

[0010] The present invention is further configured such that a drive screw is rotatably installed inside the bearing frame, the drive screw passes through the welding assembly and is threadedly connected to it, a drive motor is provided on the outer wall of the sliding frame at the position corresponding to the drive screw, the output end of the drive motor is connected to the drive screw, and a second connection interface is provided at one end of the pressure plate at the position corresponding to the welding assembly.

[0011] The present invention is further configured such that a connection port is provided at the top of the sliding frame corresponding to the position of the pressure block, and a mating slope is provided inside the connection port corresponding to the position of the extrusion surface.

[0012] The present invention is further configured such that a plurality of transmission shafts are rotatably mounted inside the main body, and a first conveyor belt and a second conveyor belt are sleeved on the outside of the transmission shafts, with a support platform connected to the main body provided between the two conveyor belts.

[0013] The beneficial effects of the laser welding equipment for capacitor terminals to aluminum foil contact according to the present invention are as follows: 1. Through the coordinated operation of various components, this system effectively solves problems such as blind spots in the bonding of large-volume capacitor terminals and wide aluminum foil, heat-induced warping, and poor welding consistency, significantly improving welding quality and mass production efficiency. The main body, drive shaft, conveyor belt one, conveyor belt two, and support platform work together. The drive shaft drives the conveyor belts to smoothly transport the wide aluminum foil, ensuring that the aluminum foil welding points accurately land on and are positioned on the support platform, preventing welding misalignment and laying the foundation for subsequent welding. The mounting shell, connecting seat, swing frame, pressure roller, and elastic element work in tandem. As the welding unit descends, the pressure rollers press against the aluminum foil and roll to both sides, flattening the foil and solving the problem of aluminum foil warping and wrinkles, ensuring a smooth bonding.

[0014] 2. The connecting frame, pressure block, pushing assembly, and limiting frame work together to drive the welding unit to rise and fall stably, reserving material feeding space while ensuring alignment accuracy. In the pressing assembly, the sliding frame, mating cavity, pressure plate, limiting plate, and elastic element 2 work together to ensure that the pressure plate presses the terminal welding tongue and aluminum foil together without gap, eliminating blind spots in the fit and reducing defects such as incomplete soldering. This design balances pressing and light path avoidance at interface 2.

[0015] 3. The support frame, welding components, drive screw, and drive motor work together to move the welding components horizontally, achieving welding without dead angles and solving the problem of uneven welding over long strokes. The pressure block and sliding frame work together to enable continuous welding, preventing heat-induced warping and widening of gaps, adapting to high-reliability mass production requirements. The elastic element three works with the sliding frame to achieve rapid component reset, improving work efficiency and ensuring stable batch welding. Attached Figure Description

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, a detailed description is provided below in conjunction with the accompanying drawings.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] Figure 1This is a three-dimensional structural diagram of a laser welding device for capacitor terminals and aluminum foil contact according to the present invention; Figure 2 This is a partial diagram of a laser welding device for contacting the terminals of a capacitor with aluminum foil, according to the present invention. Figure 3 This is an enlarged view of the welding unit of a laser welding device for contact welding capacitor terminals and aluminum foil according to the present invention; Figure 4 This is a diagram showing the separation of the welding unit in a laser welding device for contacting the terminals of a capacitor with aluminum foil, according to the present invention. Figure 5 This is an enlarged view of the pressure component of a laser welding device for contacting the terminals of a capacitor with aluminum foil, according to the present invention. Figure 6 This is a diagram showing the separation of the pressure assembly in a laser welding device for contacting the terminals of a capacitor with aluminum foil, according to the present invention. Figure 7 This is an enlarged view of the pressure block of a laser welding device for contacting the terminals of a capacitor with aluminum foil, according to the present invention.

[0019] The diagram is labeled as follows: 1. Main body; 11. Limiting frame; 12. Docking interface one; 2. Welding unit; 21. Mounting shell; 211. Limiting groove one; 212. Limiting groove two; 22. Connecting frame; 221. Docking slide; 23. Mounting cavity; 231. Connecting seat; 232. Swing frame; 233. Pressure roller; 234. Elastic element one; 24. Pressure block; 241. Limiting slider; 242. Extrusion surface; 25. Pushing assembly; 26. Pressing assembly; 261. Sliding frame; 261 1. Limiting strip one; 2612. Limiting strip two; 262. Docking cavity; 2621. Limiting plate; 263. Pressure plate; 2631. Docking interface two; 2632. Docking interface three; 2633. Elastic component two; 264. Bearing frame; 2641. Drive screw; 2642. Drive motor; 265. Welding assembly; 266. Elastic component three; 267. Connection port; 2671. Docking slope; 3. Drive shaft; 31. Conveyor belt one; 32. Conveyor belt two; 4. Bearing platform. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention 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 the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two elements or the interaction between two elements.

[0022] Please see Figure 1 - Figure 7 A laser welding device for contact welding of capacitor terminals with aluminum foil, comprising a main body 1; A connection interface 12 is provided on one side of the main body 1, and a limit frame 11 is provided on the top of the main body 1 near the connection interface 12; Welding unit 2 includes a mounting shell 21 that is slidably connected to the docking interface 12. The mounting shell 21 has mounting cavities 23 on both sides of its bottom. A connecting seat 231 is provided on the top of the inner side of the mounting cavity 23. A swing frame 232 with a pressure roller 233 rotatably mounted on one end is hinged to the outer wall of the connecting seat 231. The swing frame 232 is inclined. An elastic element 234 with one end connected to the mounting cavity 23 is provided on one side of the swing frame 232. The top of the mounting shell 21 is provided with a connecting frame 22 that slides with the limiting frame 11. A pressure block 24 is slidably installed inside the connecting frame 22. A pushing component 25 with one end connected to the limiting frame 11 is provided on the top of the pressure block 24. A pressing component 26 is slidably connected inside the mounting housing 21. The pressing component 26 includes a sliding frame 261 slidably installed inside the mounting housing 21. A docking cavity 262 is opened at one end of the sliding frame 261. A pressure plate 263 is slidably installed at the bottom inside the docking cavity 262. A bearing frame 264 is provided near the top inside the docking cavity 262. A welding component 265 is slidably installed inside the bearing frame 264. Several drive shafts 3 are rotatably installed inside the main body 1. Conveyor belt 1 31 and conveyor belt 2 32 are sleeved on the outside of the drive shafts 3. A support platform 4 connected to the main body 1 is provided between the two conveyor belts 1 31.

[0023] By adopting the above technical solution, the main body 1 is provided with a first interface 12 and a limiting frame 11, and a drive shaft 3 is rotatably installed. The drive shaft 3 is fitted with a first conveyor belt 31 and a second conveyor belt 32. A support platform 4 is located between the two first conveyor belts 31, which can stably transport aluminum foil and accurately position it. The mounting shell 21 is slidably connected to the first interface 12. The connecting seat 231 in its mounting cavity 23 is hinged to the tilting swing frame 232. The swing frame 232 has a pressure roller 233 and an elastic element 234, which can fit the aluminum foil and help to flatten it. The connecting frame 22 slides with the limiting frame 11. The pressure block 24 drives the welding unit 2 to rise and fall. The pressing component 26 can realize the pressing and welding of the terminal and the aluminum foil.

[0024] Symmetrical docking grooves 221 are provided on both sides of the connecting frame 22. A limiting slider 241 is provided on the outer wall of the pressure block 24. The limiting slider 241 is locked inside the docking groove 221 and slidably connected. An extrusion surface 242 is provided at the bottom of the pressure block 24. An elastic element 266 is provided on one side of the sliding frame 261, with one end connected to the mounting shell 21. A limiting groove 1 211 and a limiting groove 212 are symmetrically provided inside the mounting shell 21. A limiting strip 1 2611 and a limiting strip 2612 are provided on the outer wall of the sliding frame 261. The limiting strip 1 2611 and the limiting strip 2612 are slidably connected to the limiting groove 1 211 and the limiting groove 212, respectively. A connecting port 267 is provided at the top of the sliding frame 261 at the position corresponding to the pressure block 24. A docking inclined surface 2671 is provided inside the connecting port 267 at the position corresponding to the extrusion surface 242.

[0025] By adopting the above technical solution, docking grooves 221 are opened on both sides of the connecting frame 22. The limiting slider 241 on the outer wall of the pressure block 24 slides into the docking grooves 221, which can limit the sliding trajectory of the pressure block 24 and prevent deviation. Limiting groove 1 211 and limiting groove 212 are opened in the mounting shell 21. Limiting strip 1 2611 and limiting strip 2612 of the sliding frame 261 are slidably connected to them to ensure the smooth sliding of the sliding frame 261. The elastic element 3 266 on one side of the sliding frame 261 is connected to the mounting shell 21 and can drive the sliding frame 261 to reset. The docking inclined surface 2671 in the connecting port 267 of the sliding frame 261 corresponds to the pressing surface 242 of the pressure block 24, which facilitates the pressing and driving of the sliding frame 261 to move.

[0026] A limiting plate 2621 is provided inside the docking cavity 262. The pressure plate 263 has symmetrically opened docking interfaces 2632 on both sides. The limiting plate 2621 passes through the docking interfaces 2632. An elastic element 2633 is provided between the bottom of the limiting plate 2621 and the pressure plate 263. A drive screw 2641 is rotatably installed inside the bearing frame 264. The drive screw 2641 passes through the welding assembly 265 and is threadedly connected to it. A drive motor 2642 is provided on the outer wall of the sliding frame 261 at the position corresponding to the drive screw 2641. The output end of the drive motor 2642 is connected to the drive screw 2641. A docking interface 2631 is opened at one end of the pressure plate 263 at the position corresponding to the welding assembly 265.

[0027] By adopting the above technical solution, the limiting plate 2621 is located in the docking cavity 262 and passes through the third docking interface 2632 of the pressure plate 263. An elastic element 2633 is provided between the limiting plate 2621 and the pressure plate 263, which restricts the pressure plate 263 to slide vertically without deviation, while simultaneously achieving adaptive elastic clamping through the elastic element 2633. The drive motor 2642 is mounted on the outer wall of the sliding frame 261 and connected to the drive screw 2641 inside the bearing frame 264. The drive screw 2641 drives the welding assembly 265 via thread, smoothly and precisely moving the welding assembly 265 horizontally. The second docking interface 2631 of the pressure plate 263 faces the welding assembly 265, thus avoiding the laser beam path and exposing only the area to be welded while clamping the rest of the parts.

[0028] Working principle and usage process of this invention: In the initial state of the equipment, the pressure block 24 cooperates with the docking groove 221 through the limiting slider 241 to realize the bearing and limiting of the entire welding unit 2, and pushes the component 25 to pull the pressure block 24 to rise, thereby driving the entire welding unit 2 to rise synchronously, reserving sufficient space for aluminum foil feeding, while ensuring that the welding unit 2 does not deviate during the lifting process, and ensuring the positioning accuracy of subsequent welding.

[0029] In operation, the drive shaft 3 rotates, driving conveyor belts 31 and 32 to move synchronously, thus moving the wide aluminum foil smoothly. When the welding point corresponding to the terminal on the aluminum foil surface moves to the interface 12 position, it falls precisely on the support platform 4, and conveyor belts 31 and 32 stop rotating, achieving precise positioning of the aluminum foil and preventing welding misalignment caused by foil displacement during welding, thus solving the problem of inaccurate welding positioning in existing technologies. Subsequently, a robotic arm precisely aligns the welding tongue at the end of the terminal with the welding point on the aluminum foil surface, laying the foundation for subsequent tight bonding welding.

[0030] After alignment, the pusher component 25 pushes the pressure block 24 downward, thereby driving the entire welding unit 2 to descend synchronously. At this time, the pressure rollers 233 on both sides of the bottom of the mounting shell 21 first align with the aluminum foil surface. As the mounting shell 21 continues to fall, the pressure rollers 233 are blocked by the aluminum foil and are squeezed into the mounting cavity 23. Since the swing frame 232 is hinged to one side of the connecting seat 231, and the outer wall of the swing frame 232 is connected to an elastic element 234 with one end connected to the inner wall of the mounting cavity 23, the elastic force of the elastic element 234 keeps the pressure rollers 233 in close contact with the aluminum foil surface. As the mounting housing 21 continues to press down, the swing frame 232 is subjected to the reaction force of the aluminum foil and flips upward around the connecting seat 231. The elastic element 234 is compressed and generates a reverse elastic force, which further enhances the adhesion between the pressure roller 233 and the aluminum foil. At the same time, the pressure roller 233 rolls to both sides, flattening the wide aluminum foil completely, thus completely solving the problem of excessive bonding gap caused by warping and wrinkling when feeding wide aluminum foil in the prior art, and providing a flat base for the tight bonding between the terminal and the aluminum foil.

[0031] As welding unit 2 continues to descend, the bottom of mounting shell 21 presses against the aluminum foil surface, further flattening and fixing the aluminum foil. Simultaneously, pressure plate 263 in the pressing assembly 26 presses against the welding tongue of the terminal. Since pressure plate 263 is slidably connected to mating cavity 262, it moves upward after being blocked by the welding tongue, squeezing the elastic element 2633 connected to the bottom of limiting plate 2621. The reverse elastic force generated by elastic element 2633 applies downward pressure to pressure plate 263, firmly pressing the terminal welding tongue against the aluminum foil, achieving a tight, gapless fit. This avoids the blind spot formed by the lack of pressure in the central area in existing technologies, reducing defects such as incomplete soldering, cratering, and porosity at the source. At this time, the mating interface 2631 at one end of pressure plate 263 exposes the part of the welding tongue to be welded, providing an unobstructed light path for laser welding, balancing tight fit and laser avoidance, and resolving the inherent contradiction between the two.

[0032] Subsequently, the drive motor 2642 starts, driving the drive screw 2641 inside the support frame 264 to rotate. Since the drive screw 2641 passes through the welding component 265 and is threadedly connected to it, when the drive screw 2641 rotates, it drives the welding component 265 to move horizontally inside the support frame 264, realizing all-round welding of the part to be welded on the welding tongue, ensuring that the welding coverage is without dead corners, and solving the problem of uneven welding of large-size welding surfaces over long strokes.

[0033] After the exposed welding portion of interface 2631 is welded, the pushing component 25 continues to push the pressure block 24 downward. The pressing surface 242 at the bottom of the pressure block 24 and the mating slope 2671 in the top connection port 267 of the sliding frame 261 press against each other, thereby driving the entire pressing component 26 to move into the mounting shell 21. During the movement, the pressure plate 263 gradually exposes the unwelded portion of the terminal welding tongue, and the welding component 265 moves synchronously to weld the exposed unwelded portion, realizing a continuous operation mode of moving, exposing, and welding simultaneously. Throughout the process, the unwelded area is always pressed tightly by the pressure plate 263, avoiding the unconstrained area from warping due to heat during the welding process, further expanding the fitting gap, and ensuring the consistency of long-stroke welding.

[0034] Until the welding assembly 265 completes the welding of the terminal welding tongue to the aluminum foil, the push assembly 25 pulls the pressure block 24 upward. The pressure block 24 drives the entire welding unit 2 to rise synchronously. At the same time, the elastic element 266 connected to one end of the sliding frame 261 generates elastic force, pushing the sliding frame 261 to reset. The elastic element 2633 also pushes the pressure plate 263 downward to reset. All components return to their initial state. The conveyor belt 31 and the conveyor belt 32 start running again, driving the welded aluminum foil to move and enter the next welding cycle, realizing stable batch production.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser welding device for contact welding of capacitor terminals to aluminum foil, characterized in that, include: Main body (1); The main body (1) has a docking interface (12) on one side, and a limit frame (11) is provided on the top of the main body (1) near the docking interface (12). Welding unit (2), the welding unit (2) includes a mounting shell (21) that is slidably connected to the docking interface (12), the mounting shell (21) has mounting cavities (23) on both sides of the bottom, the mounting cavity (23) has a connecting seat (231) on the top of the inner side of the mounting cavity (23), and the outer wall of the connecting seat (231) is hinged to a swing frame (232) with a pressure roller (233) rotatably mounted on one end; The top of the mounting shell (21) is provided with a connecting frame (22) that slides with the limiting frame (11). A pressure block (24) is slidably installed inside the connecting frame (22). A pushing component (25) with one end connected to the limiting frame (11) is provided on the top of the pressure block (24). The mounting housing (21) is slidably connected to a pressing assembly (26). The pressing assembly (26) includes a sliding frame (261) slidably installed inside the mounting housing (21). One end of the sliding frame (261) is provided with a docking cavity (262). A pressure plate (263) is slidably installed at the bottom inside the docking cavity (262). A bearing frame (264) is provided near the top inside the docking cavity (262). A welding assembly (265) is slidably installed inside the bearing frame (264).

2. The laser welding equipment for capacitor terminals and aluminum foil contact as described in claim 1, characterized in that: The swing frame (232) is inclined, and an elastic element (234) is provided on one side of the swing frame (232) and one end is connected to the mounting cavity (23).

3. The laser welding equipment for capacitor terminals and aluminum foil contact as described in claim 1, characterized in that: The connecting frame (22) has symmetrical docking grooves (221) on both sides. The outer wall of the pressure block (24) is provided with a limiting slider (241). The limiting slider (241) is locked inside the docking groove (221) and slidably connected. The bottom of the pressure block (24) has an extrusion surface (242).

4. The laser welding equipment for capacitor terminals and aluminum foil contact as described in claim 1, characterized in that: The sliding frame (261) has an elastic element three (266) on one side that is connected to the mounting shell (21) at one end. The mounting shell (21) has symmetrically opened limiting groove one (211) and limiting groove two (212) inside. The outer wall of the sliding frame (261) is correspondingly provided with limiting strip one (2611) and limiting strip two (2612). The limiting strip one (2611) and limiting strip two (2612) are slidably connected to the limiting groove one (211) and limiting groove two (212) respectively.

5. The laser welding equipment for capacitor terminals to aluminum foil contact as described in claim 1, characterized in that: The docking cavity (262) is provided with a limiting plate (2621), and the pressure plate (263) is provided with symmetrical docking interfaces (2632) on both sides. The limiting plate (2621) passes through the docking interface (2632), and an elastic element (2633) is provided between the bottom of the limiting plate (2621) and the pressure plate (263).

6. The laser welding equipment for capacitor terminals to aluminum foil contact as described in claim 1, characterized in that: The carrying frame (264) is rotatably mounted with a drive screw (2641), which passes through the welding assembly (265) and is threadedly connected to it. The outer wall of the sliding frame (261) is provided with a drive motor (2642) at the position corresponding to the drive screw (2641). The output end of the drive motor (2642) is connected to the drive screw (2641). One end of the pressure plate (263) is provided with a second interface (2631) at the position corresponding to the welding assembly (265).

7. The laser welding equipment for capacitor terminals to aluminum foil contact as described in claim 1, characterized in that: The sliding frame (261) has a connection port (267) at the top corresponding to the pressure block (24), and a mating slope (2671) is provided inside the connection port (267) at the position corresponding to the extrusion surface (242).

8. The laser welding equipment for capacitor terminals to aluminum foil contact as described in claim 1, characterized in that: Several drive shafts (3) are rotatably installed inside the main body (1). A first conveyor belt (31) and a second conveyor belt (32) are sleeved on the outside of the drive shafts (3). A support platform (4) connected to the main body (1) is provided between the two first conveyor belts (31).

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