Welding pressing assembly and welding device

Abstract

The utility model discloses a welding pressing assembly and a welding device. The welding pressing assembly comprises a welding pressing nozzle, the welding pressing nozzle is provided with a first welding channel, the welding pressing nozzle comprises a pressing nozzle connecting part and a pressing nozzle main body part, the heat resistance of the pressing nozzle main body part is larger than that of the pressing nozzle connecting part, the pressing nozzle main body part is connected with the pressing nozzle connecting part, and the pressing nozzle main body part is used for pressing a to-be-welded part. The first welding channel penetrates through the pressing nozzle connecting part and the pressing nozzle body part so that part of the to-be-welded part can be exposed through the first welding channel. Therefore, the to-be-welded part can be pressed through the pressing nozzle main body part, the exposed to-be-welded part is welded through the first welding channel, and the heat resistance of the pressing nozzle main body part is larger than that of the pressing nozzle connecting part, so that the welding pressing nozzle can better bear heat generated in the welding process through the pressing nozzle main body part; and the risk of overheating deformation of the welding pressing nozzle is reduced, so that the service life of the welding pressing assembly is prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a welding pressing assembly and welding apparatus. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] During battery manufacturing, the adapter pieces need to be welded. During the welding process, the welding pressing components need to be pressed by welding pressing components. However, the heat resistance of the welding pressing components in the existing technology is poor, which makes the welding pressing components prone to overheating and deformation, resulting in a low service life of the welding pressing components. Utility Model Content

[0004] The main objective of this application is to provide a welding pressing assembly and a welding device, which aims to solve the technical problem of low service life of welding pressing assemblies in the prior art.

[0005] To address the aforementioned problems, this application provides a welding pressing assembly. The welding pressing assembly includes a welding nozzle with a first welding channel. The welding nozzle includes a nozzle connecting portion and a nozzle body portion. The heat resistance of the nozzle body portion is greater than that of the nozzle connecting portion. The nozzle body portion and the nozzle connecting portion are connected. The nozzle body portion is used to press the workpiece to be welded. The first welding channel penetrates through the nozzle connecting portion and the nozzle body portion, exposing a portion of the workpiece to be welded. Therefore, the workpiece to be welded can be pressed by the nozzle body portion, and welding can be performed on the exposed workpiece through the first welding channel. The heat resistance of the nozzle body portion is greater than that of the nozzle connecting portion, allowing the welding nozzle to better withstand the heat generated during the welding process, reducing the risk of overheating and deformation of the welding nozzle, thereby improving the service life of the welding pressing assembly.

[0006] In some embodiments, the welding nozzle includes a nozzle contact portion connected to the side of the nozzle body opposite to the nozzle connection portion. The nozzle body presses the workpiece to be welded through the nozzle contact portion. Therefore, the welding nozzle can directly contact the workpiece to be welded through the nozzle contact portion, reducing the risk of wear and slag shedding caused by direct contact between the nozzle body and the workpiece, and improving the service life of the welding nozzle.

[0007] In some embodiments, the thickness of the nozzle contact portion is greater than or equal to 1 mm and less than or equal to 2 mm. Therefore, by setting the thickness of the nozzle contact portion to be smaller, the risk of heat accumulation and deformation of the nozzle contact portion can be reduced, thereby improving the service life of the welding nozzle.

[0008] In some embodiments, a heat dissipation structure is provided on the side of the nozzle body opposite to the first welding channel. This heat dissipation structure improves the heat dissipation efficiency of the nozzle body, helps reduce heat accumulation in the nozzle body, thereby mitigating the risk of softening and deformation of the nozzle body due to high temperatures and extending the service life of the welding nozzle.

[0009] In some embodiments, the heat dissipation structure includes a heat dissipation protrusion that protrudes from the nozzle body on the side opposite to the first welding channel. Therefore, the heat dissipation protrusion increases the contact area between the heat dissipation structure and the air, improving the heat dissipation effect and mitigating the risk of the nozzle body softening and deforming due to high temperatures.

[0010] In some embodiments, the heat dissipation structure includes a heat dissipation groove located on the side of the nozzle body opposite to the first welding channel. This heat dissipation groove increases the contact area between the heat dissipation structure and the air, improving the heat dissipation effect and mitigating the risk of the nozzle body softening and deforming due to high temperatures.

[0011] In some embodiments, the welding nozzle is further provided with a first air inlet channel, which is connected to a first welding channel. Thus, protective gas can be supplied to the first welding channel through the first air inlet channel, improving welding quality and thereby enhancing the reliability of the welding nozzle. Furthermore, the protective gas can absorb welding heat, enhancing the heat dissipation effect of the welding nozzle.

[0012] In some embodiments, the welding nozzle is further provided with an air intake channel, which is connected to the first welding channel. This allows negative pressure to be applied to the first welding channel through the air intake channel, facilitating the guidance of the protective gas through the first air intake channel and the air intake channel to form a unidirectional, continuous protective airflow. This improves the flowability of the protective gas within the first welding channel and enhances the heat dissipation effect of the welding nozzle.

[0013] In some embodiments, the welding pressing assembly includes an upper cover connected to the nozzle connecting portion on the side opposite to the nozzle body. The upper cover has a nozzle mating portion with a second welding channel communicating with a first welding channel. Thus, the nozzle mating portion of the upper cover can cooperate with the nozzle body to press the workpiece to be welded, and welding can be performed on the exposed workpiece through the first and second welding channels, improving welding quality.

[0014] In some embodiments, the welding nozzle is provided with a first suction groove, which communicates with a first welding channel, and a nozzle mating part covers the opening of the first suction groove; and / or, the nozzle mating part is provided with a second suction groove, which communicates with a second welding channel, and a nozzle connecting part covers the opening of the second suction groove. Thus, a negative pressure can be applied to the first welding channel through the first and second suction grooves, thereby removing welding slag from the first and second welding channels, reducing the risk of welding slag adhering to the first and second welding channels and contaminating the workpiece to be welded, and improving the reliability of the welding nozzle.

[0015] In some embodiments, the welding nozzle is further provided with a first air inlet channel, which is connected to the first welding channel, and the nozzle mating part is provided with a second air inlet channel, which is connected to the first air inlet channel. Thus, the first and second air inlet channels can cooperate to provide protective gas to the first welding channel, improving welding quality and thereby increasing the reliability of the welding nozzle. Furthermore, the protective gas can absorb welding heat, enhancing the heat dissipation effect of the welding pressing assembly.

[0016] In some embodiments, the nozzle connecting portion has a first floating groove on each side, and the nozzle mating portion has a second floating groove on each side. A first wall portion of the first floating groove, away from the nozzle body, is located within the second floating groove, and a second wall portion of the second floating groove, near the nozzle connecting portion, is located within the first floating groove. The first floating groove is configured to allow the second wall portion to move within it, and the second floating groove is configured to allow the second wall portion to move within it. Thus, by allowing the first wall portion to move within the first floating groove and the second wall portion to move within the second floating groove, the nozzle mating portion and the nozzle connecting portion can move relative to each other, thereby flexibly adjusting the pressing force of the welding pressing assembly on the workpiece to be welded and improving welding stability.

[0017] In some embodiments, there are at least two welding nozzles located on the same side of the upper cover. The upper cover has at least two nozzle mating parts, with each welding nozzle corresponding to one nozzle mating part. Therefore, by setting at least two welding nozzles and corresponding nozzle mating parts, the welding pressing assembly can simultaneously press and weld at least two parts to be welded, improving production efficiency.

[0018] To address the aforementioned problems, this application also provides a welding apparatus, which includes the aforementioned welding pressing assembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments 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 these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a welding apparatus according to one or more embodiments of this application;

[0021] Figure 2 This is an exploded view of a battery cell according to one or more embodiments of this application;

[0022] Figure 3 This is a first structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0023] Figure 4 This is a second structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0024] Figure 5 This is a third structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0025] Figure 6 This is a fourth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0026] Figure 7 This is a fifth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0027] Figure 8 This is a sixth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0028] Figure 9 This is a seventh structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0029] Figure 10 This is an eighth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application;

[0030] Figure 11 This is a ninth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application.

[0031] Reference numerals: 1. Welding device; 2. Welding pressing assembly; 3. Battery cell; 31. Casing; 311. End cap; 312. Electrode; 32. Adapter piece; 33. Welding nozzle; 10. First welding channel; 11. Nozzle connection part; 12. Nozzle body part; 13. Heat dissipation structure; 131. Heat dissipation protrusion; 1311. Heat dissipation groove; 1312. Nozzle contact part; 14. First air intake channel; 15. Suction channel; 16. First suction groove; 161. First floating groove; 17. First wall part; 171. Upper cover; 20. Nozzle mating part; 21. Second welding channel; 211. Second suction groove; 212. Second air intake channel; 213. Second floating groove; 22. Second wall part; 221. Detailed Implementation

[0032] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0041] During battery manufacturing, the adapter pieces need to be welded. During the welding process, the welding pressing components need to be pressed by the welding pressing components. However, the welding pressing components have poor heat resistance, which makes them prone to overheating and deformation, resulting in a short service life.

[0042] To address the technical problems existing in related technologies, a welding pressing assembly and a welding device are provided. The welding pressing assembly includes a welding nozzle, which includes a nozzle connecting part and a nozzle body. The nozzle body can press the workpiece to be welded and weld the exposed workpiece through a first welding channel. The heat resistance of the nozzle body is greater than that of the nozzle connecting part, which allows the welding nozzle to better withstand the heat generated during the welding process, reducing the risk of overheating and deformation of the welding nozzle, thereby improving the service life of the welding pressing assembly.

[0043] Combination Figure 1 , Figure 1 This is a schematic diagram of the structure of a welding apparatus according to one or more embodiments of this application.

[0044] This application also provides a welding apparatus 1, which includes a welding pressing component 2. The welding apparatus 1 can be used to weld parts to be welded, and the welding pressing component 2 can press and position the parts to be welded during the welding process, thereby improving welding stability. The welding apparatus 1 may also include, but is not limited to, a laser welding component, a dust removal component, etc., wherein the laser welding component can be used to generate a welding laser to weld the parts to be welded, and the dust removal component can be used to remove welding slag and impurities generated during the welding process. The parts to be welded can be components that need to be welded during battery production.

[0045] Combination Figure 2 , Figure 2 This is an exploded view of a battery cell according to one or more embodiments of this application.

[0046] A battery typically includes a casing and individual battery cells 3, with the individual battery cells 3 housed within the casing. There can be multiple individual battery cells 3, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple individual battery cells 3 are connected in both series and parallel configurations. Multiple individual battery cells 3 can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these cells is housed within the casing. Alternatively, the battery can be composed of multiple individual battery cells 3 first connected in series, parallel, or a combination thereof to form a battery module, and then these modules are further connected in series, parallel, or a combination thereof to form a single unit, which is then housed within the casing. The battery may also include other structures; for example, it may include a busbar component for electrical connection between the multiple individual battery cells 3.

[0047] The manufacturing methods for battery cells 3 include stacking and winding, meaning battery cells 3 are divided into two types: stacked cells and wound cells. Stacked cells have uniform current collection, low internal resistance, and high specific power. However, to improve precision, extremely high precision requirements are placed on the molds, resulting in high equipment investment, complex processes, and low production efficiency. Wound cells are simple to manufacture, with less stringent precision requirements for equipment during the sheet fabrication and assembly processes. They offer high production efficiency and lower costs. In terms of performance, wound cells possess excellent high and low temperature performance, very rapid charging, ultra-long lifespan, stable high output voltage, robust structure, and strong shock resistance.

[0048] A battery cell 3 refers to the smallest unit that makes up a battery. A battery cell 3 may include a casing 31, electrode assemblies, and other functional components.

[0049] The outer casing 31 includes an end cap 312 and a housing 311. The end cap 312 is a component that covers the opening of the housing 311 to isolate the internal environment of the battery cell 3 from the external environment. The shape of the end cap 312 can be adapted to the shape of the housing 311 to fit it. Optionally, the end cap 312 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 312 is less prone to deformation under pressure and impact, allowing the battery cell 3 to have higher structural strength and improved safety performance. Functional components such as electrode terminals can be provided on the end cap 312. The electrode terminals can be used for electrical connection with electrode assemblies to output or input electrical energy to the battery cell 3. In some embodiments, the electrode terminals can include terminals. Terminals can include positive and negative terminals for current output and connection to external circuits. In some embodiments, the end cap 312 can also be provided with an explosion-proof component for releasing internal pressure when the internal pressure or temperature of the battery cell 3 reaches a threshold. The end cap 312 may be made of materials including, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating element may be provided on the inner side of the end cap 312. The insulating element can be used to isolate the electrical connection components within the housing 311 from the end cap 312 to reduce the risk of short circuits. For example, the insulating element may include, but is not limited to, plastic and rubber.

[0050] The housing 311 is a component used to cooperate with the end cap 312 to form the internal environment of the battery cell 3. This internal environment can accommodate electrode components, electrolyte, and other components. The housing 311 and the end cap 312 can be independent components. An opening can be provided on the housing 311, and the end cap 312 closes the opening to form the internal environment of the battery cell 3. Alternatively, the end cap 312 and the housing 311 can be integrated. Specifically, the end cap 312 and the housing 311 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 311, the end cap 312 closes the housing 311. The housing 311 can have various shapes and sizes, including but not limited to cuboid, cylindrical, and hexagonal prism shapes. Specifically, the shape of the housing 311 can be determined according to the specific shape and size of the electrode components. The material of the housing 311 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0051] The electrode assembly is the component in the battery cell 3 where the electrochemical reaction occurs. The casing 311 may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is 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 the electrode assembly, while the portions without active material each constitute a tab 32. The positive and negative tabs can be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the positive and negative tabs can be connected to the electrode terminals on the end cap 312 via an adapter 33 to form a current loop.

[0052] The components to be welded can include, but are not limited to, adapter piece 33, tab 32, and end cap 312. For example, taking adapter piece 33 as the component to be welded, the adapter piece 33 can be fixed to the end cap 312 by laser welding or other methods, and then the positive and negative tabs can be connected to the adapter piece 33. During the laser welding of the adapter piece 33, the adapter piece 33 can be pressed and positioned on the end cap 312 by the welding pressing component 2.

[0053] During the welding process, the welding pressing component 2 absorbs some of the welding heat. Under continuous welding conditions, the heat tends to accumulate on the welding pressing component 2, which can lead to problems such as heat accumulation deformation and short service life.

[0054] Combination Figure 3 , Figure 3 This is a first structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application.

[0055] The welding pressing assembly 2 includes a welding nozzle 10, which has a first welding channel 11. The welding nozzle 10 includes a nozzle connecting part 12 and a nozzle body part 13. The heat resistance of the nozzle body part 13 is greater than that of the nozzle connecting part 12. The nozzle body part 13 and the nozzle connecting part 12 are connected. The nozzle body part 13 is used to press the workpiece to be welded. The first welding channel 11 passes through the nozzle connecting part 12 and the nozzle body part 13 to expose part of the workpiece to be welded.

[0056] The welding nozzle 10 can be used to press the workpiece to be welded, thereby fixing the workpiece and improving the welding stability. The nozzle connecting part 12 can be used to connect the nozzle body 13 and other components of the welding pressing assembly 2. The nozzle body 13 can directly or indirectly contact the workpiece to be welded to press it. The first welding channel 11 passes through the nozzle connecting part 12 and the nozzle body 13, and part of the workpiece to be welded can be exposed on the side of the nozzle connecting part 12 away from the nozzle body 13 through the first welding channel 11. It should be noted that the welding heat source can weld the exposed part of the workpiece to be welded through the first welding channel 11. For example, when the welding heat source is a laser welding assembly, the laser welding assembly can emit a welding laser from the side of the nozzle connecting part 12 away from the nozzle body 13 through the first welding channel 11 to the workpiece to be welded, thereby welding the workpiece. It is understandable that during the welding process, some of the welding heat released by welding heat sources such as welding lasers will be transferred to the welding nozzle 10, which will cause the temperature of the welding nozzle 10 to rise. In the state of continuous welding, heat will continue to accumulate on the welding nozzle 10. The nozzle body 13 is closer to the welding area on the workpiece to be welded than the nozzle connecting part 12, and the heat is mainly borne by the nozzle body 13.

[0057] Heat resistance refers to the comprehensive ability of a material to maintain its physical, chemical, and mechanical properties under high-temperature conditions. For example, the softening temperature of the nozzle body 13 may be higher than that of the nozzle connecting part 12, the melting point of the nozzle body 13 may be higher than that of the nozzle connecting part 12, the coefficient of thermal expansion of the nozzle body 13 may be lower than that of the nozzle connecting part 12, and the thermal conductivity of the nozzle body 13 may be greater than that of the nozzle connecting part 12. Optionally, the material of the nozzle body 13 may be, but is not limited to, tungsten-copper alloy, etc., and the material of the nozzle connecting part 12 may be, but is not limited to, stainless steel, etc. The copper content in the tungsten-copper alloy may be greater than or equal to 20% and less than or equal to 80%. For example, the copper content may be between 20% and 50%, or between 40% and 60%, or between 50% and 80%. Optionally, the copper content may be, but is not limited to, 20%, 30%, 40%, 45%, 50%, 60%, 80%, etc. The stainless steel may include, but is not limited to, SUS316 stainless steel, etc.

[0058] As an example, taking the nozzle body 13 as a tungsten-copper alloy and the nozzle connecting part 12 as SUS316 stainless steel, the melting point of the tungsten-copper alloy is much higher than that of SUS316 stainless steel, which can increase the temperature that the nozzle body 13 can withstand and reduce the risk of the nozzle body 13 melting or deforming. The tungsten-copper alloy also has high strength and hardness, which can help the nozzle body 13 better withstand the stress and pressure generated during the welding process, further reducing the risk of the nozzle body 13 melting or deforming. The tungsten-copper alloy also has good oxidation resistance and a low coefficient of thermal expansion, which reduces the risk of oxidation of the nozzle body 13, extends the service life of the nozzle body 13, and reduces the stress and deformation caused by thermal expansion, which helps to maintain the precise size and shape of the nozzle body 13. At the same time, the tungsten-copper alloy also has good processing performance, which reduces the processing difficulty of the nozzle body 13 and saves costs. It is understandable that by making the heat resistance of the nozzle body 13 greater than that of the nozzle connecting part 12, the nozzle body 13 can better withstand the heat absorbed during the welding process, reduce the risk of the nozzle body 13 softening and deforming at high temperatures, and thus extend the service life of the welding nozzle 10.

[0059] Through the above embodiments, the workpiece to be welded can be pressed by the main body 13 of the nozzle, and the exposed workpiece to be welded can be welded through the first welding channel 11. The heat resistance of the main body 13 of the nozzle is greater than that of the nozzle connecting part 12, which makes it easier for the welding nozzle 10 to better withstand the heat generated during the welding process through the main body 13 of the nozzle, reducing the risk of overheating and deformation of the welding nozzle 10, thereby improving the service life of the welding pressing assembly 2.

[0060] In some embodiments, the welding nozzle 10 includes a nozzle contact portion 14, which is connected to the nozzle body 13 on the side opposite to the nozzle connecting portion 12. The nozzle body 13 presses the workpiece to be welded through the nozzle contact portion 14. It is understood that during the welding process, the nozzle contact portion 14 is located between the nozzle body 13 and the workpiece to be welded. The nozzle contact portion 14 can be used to directly contact the workpiece to be welded. Exemplarily, the nozzle contact portion 14 can directly contact and press the workpiece to be welded under the action of the nozzle body 13. The nozzle contact portion 14 can be made of a material with good wear resistance. The material of the nozzle contact portion 14 can include, but is not limited to, stainless steel, wherein stainless steel can include, but is not limited to, SUS316 stainless steel, etc. Understandably, the nozzle body 13 presses against the workpiece to be welded via the nozzle contact portion 14, effectively reducing the risk of wear on the nozzle body 13 during welding. In some applications, the nozzle body 13 is made of tungsten-copper alloy, and the nozzle contact portion 14 effectively reduces the risk of copper metal debris falling onto the workpiece due to wear of the tungsten-copper alloy, thus improving the reliability of the workpiece. It should be noted that the first welding channel 11 can also penetrate the nozzle contact portion 14. Therefore, the welding nozzle 10 can directly contact the workpiece to be welded via the nozzle contact portion 14, reducing the risk of wear and slag shedding caused by direct contact between the nozzle body 13 and the workpiece, and improving the service life of the welding nozzle 10.

[0061] In some embodiments, the thickness of the nozzle contact portion 14 is greater than or equal to 1 mm and less than or equal to 2 mm. Exemplarily, the thickness of the nozzle contact portion 14 may be greater than or equal to 1 mm and less than or equal to 1.5 mm, or greater than or equal to 1.4 mm and less than or equal to 2 mm. Specifically, the thickness of the nozzle contact portion 14 may be, but is not limited to, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.9 mm, 2 mm, etc. The thickness of the nozzle contact portion 14 refers to the thickness dimension of the nozzle contact portion 14 in the direction from the nozzle connecting portion 12 to the nozzle body portion 13. It should be noted that by setting the thickness of the nozzle contact portion 14 to be greater than or equal to 1 mm and less than or equal to 2 mm, the nozzle contact portion 14 can stably press the workpiece to be welded. At the same time, it minimizes the deformation space of the nozzle contact portion 14. Even if the heat accumulated on the welding nozzle 10 causes the nozzle contact portion 14 to reach its softening temperature, the smaller deformation space reduces the risk of deformation and improves the structural stability of the nozzle contact portion 14. Therefore, by setting the thickness of the nozzle contact portion 14 to be smaller, the risk of heat accumulation and deformation can be reduced, thereby increasing the service life of the welding nozzle 10.

[0062] In some embodiments, a heat dissipation structure 131 is provided on the side of the nozzle body 13 facing away from the first welding channel 11. The heat dissipation structure 131 can be used to improve the heat dissipation efficiency of the nozzle body 13. The heat dissipation structure 131 can have high thermal conductivity. Exemplarily, the first welding channel 11 penetrates through the nozzle body 13, and the heat dissipation structure 131 is disposed on the outer wall of the nozzle body 13 facing away from the first welding channel 11. The number of heat dissipation structures 131 can be one or more. For example, when the number of heat dissipation structures 131 is multiple, multiple heat dissipation structures 131 can be spaced apart on the outer periphery of the nozzle body 13. Optionally, the heat dissipation structure 131 can include, but is not limited to, heat dissipation fins, heat dissipation particles, heat dissipation protrusions, and heat dissipation grooves, etc. Among them, heat dissipation particles can increase the roughness of the outer surface of the nozzle body 13, thereby improving the heat dissipation efficiency. The heat dissipation particles can be formed by means including but not limited to etching or sandblasting of the nozzle body 13. It should be noted that various heat dissipation structures 131 can also be mixed and arranged. For example, multiple heat dissipation structures 131 may include multiple heat dissipation protrusions and multiple heat dissipation grooves, which can be spaced apart from each other. Thus, the heat dissipation efficiency of the nozzle body 13 can be improved by the heat dissipation structure 131, which helps to reduce the heat accumulation of the nozzle body 13, thereby mitigating the risk of softening and deformation of the nozzle body 13 due to high temperature and improving the service life of the welding nozzle 10.

[0063] Combination Figures 4-5 , Figure 4 This is a second structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application; Figure 5 This is a third structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application.

[0064] In some embodiments, the heat dissipation structure 131 includes a heat dissipation protrusion 1311, which protrudes from the side of the nozzle body 13 away from the first welding channel 11. Exemplarily, the heat dissipation protrusion 1311 may protrude from the outer wall of the nozzle body 13. The material of the heat dissipation protrusion 1311 may include, but is not limited to, copper, aluminum, etc. The number of heat dissipation protrusions 1311 may be one or more. Exemplarily, when there are multiple heat dissipation protrusions 1311, the multiple heat dissipation protrusions 1311 may be spaced apart on the outer periphery of the nozzle body 13. Optionally, the multiple heat dissipation protrusions 1311 may also be arranged in an array on the outer wall of the nozzle body 13. It should be noted that the multiple heat dissipation protrusions 1311 can effectively disperse heat and reduce the risk of local heat concentration in the nozzle body 13. It is understood that the heat dissipation protrusion 1311 can increase the contact area between the welding nozzle 10 and the air, and the heat dissipation protrusion 1311 has high thermal conductivity, thereby improving the heat dissipation effect of the welding nozzle 10. In some applications, the heat dissipation protrusion 1311 is made of copper strip. Therefore, the heat dissipation protrusion 1311 can increase the contact area between the heat dissipation structure 131 and the air, improve the heat dissipation effect of the heat dissipation structure 131, and thus alleviate the risk of softening and deformation of the nozzle body 13 due to high temperature.

[0065] In some embodiments, the heat dissipation structure 131 includes a heat dissipation groove 1312, which is located on the side of the nozzle body 13 opposite to the first welding channel 11. Exemplarily, the heat dissipation groove 1312 may be disposed on the outer wall of the nozzle body 13. The number of heat dissipation grooves 1312 can be one or more. Exemplarily, when the number of heat dissipation grooves 1312 is multiple, the multiple heat dissipation grooves 1312 may be spaced apart on the outer periphery of the nozzle body 13. Optionally, the multiple heat dissipation grooves 1312 may also be arranged in an array on the outer wall of the nozzle body 13. It should be noted that the multiple heat dissipation grooves 1312 can effectively disperse heat and reduce the risk of local heat concentration in the nozzle body 13. Viewed in the opening direction of the heat dissipation groove 1312, the shape of the heat dissipation groove 1312 can be any shape, including but not limited to a circle, square, or other irregular shapes. Therefore, the heat dissipation groove 1312 can increase the contact area between the heat dissipation structure 131 and the air, improve the heat dissipation effect of the heat dissipation structure 131, and thus alleviate the risk of softening and deformation of the nozzle body 13 due to high temperature.

[0066] Combination Figure 6 , Figure 6 This is a fourth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application.

[0067] In some embodiments, the welding nozzle 10 further includes a first air inlet channel 15, which communicates with the first welding channel 11. Exemplarily, the first air inlet channel 15 may penetrate the nozzle connecting portion 12 and a portion of the nozzle body portion 13 and communicate with the first welding channel 11. It should be noted that a protective gas can be provided to the first welding channel 11 through the first air inlet channel 15, thereby protecting the workpiece to be welded during the welding process and reducing the risk of the workpiece reacting with air at high temperatures. The protective gas can be an inert gas, including but not limited to helium and nitrogen. It is understood that the protective gas can also absorb heat from the welding nozzle 10, improving the heat dissipation efficiency of the welding nozzle 10. Exemplarily, the first air inlet channel 15 may be connected to an air pump, facilitating the pumping of protective gas into the first air inlet channel 15. In some applications, the welding pressing assembly 2 may also include a vortex tube connected to the first air intake channel 15. Shielding gas can enter the first air intake channel 15 through the vortex tube. It should be noted that the vortex tube can lower the temperature of the shielding gas, thereby allowing the low-temperature shielding gas to better absorb heat from the welding nozzle 10. Optionally, the temperature of the shielding gas can be lowered to 0 to 10°C through the vortex tube. It is understood that shielding gas can be supplied to the first welding channel 11 through the first air intake channel 15 during welding and after welding, thereby better reducing the temperature of the welding nozzle 10. Thus, providing shielding gas to the first welding channel 11 through the first air intake channel 15 improves welding quality, thereby increasing the reliability of the welding nozzle 10. Furthermore, the shielding gas absorbs welding heat, enhancing the heat dissipation effect of the welding nozzle 10.

[0068] In some embodiments, the welding nozzle 10 is further provided with a suction channel 16, which is connected to the first welding channel 11. It should be noted that a negative pressure can be applied to the first welding channel 11 through the suction channel 16, thereby drawing the gas in the first welding channel 11 out through the suction channel 16. It is understood that the protective gas enters the first welding channel 11 through the first inlet channel 15 and can be drawn out through the suction channel 16 under the action of negative pressure, thus forming a unidirectional continuous protective gas flow between the first inlet channel 15, the first welding channel 11, and the suction channel 16. This improves the fluidity of the protective gas, enhances the cooling effect of the protective gas on the welding nozzle 10, and extends the service life of the welding nozzle 10. Simultaneously, the protective gas flow can also carry welding slag, dust, and other impurities in the first welding channel 11 out of the first welding channel 11 through the suction channel 16, thereby improving the cleanliness of the welding environment and improving welding quality. Exemplarily, the suction channel 16 can be connected to a vacuum generator, thereby facilitating the application of negative pressure to the suction channel 16. Therefore, negative pressure can be applied to the first welding channel 11 through the suction channel 16, which facilitates the guidance of protective gas to form a unidirectional continuous protective airflow through the first intake channel 15 and the suction channel 16. This helps to improve the flow of protective gas in the first welding channel 11 and enhance the heat dissipation effect of the welding nozzle 10.

[0069] Combination Figures 7-8 , Figure 7 This is a fifth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application; Figure 8 This is a sixth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application.

[0070] In some embodiments, the welding pressing assembly 2 includes an upper cover 20, which is connected to the nozzle connecting portion 12 on the side opposite to the nozzle body 13. The upper cover 20 has a nozzle mating portion 21, which has a second welding channel 211 that communicates with the first welding channel 11. The upper cover 20 can provide an installation base for the welding nozzle 10, thereby providing fixation and support for the welding nozzle 10. The nozzle mating portion 21 is used to connect with the nozzle connecting portion 12, and the nozzle connecting portion 12 can be installed with the upper cover 20 through the nozzle mating portion 21. The nozzle connecting portion 12 can be detachably connected to the nozzle mating portion 21. The nozzle mating part 21 is provided with a second welding channel 211. It is understood that the workpiece to be welded can be exposed on the side of the upper cover 20 away from the welding nozzle 10 through the first welding channel 11 and the second welding channel 211. The welding heat source can weld the exposed part of the workpiece through the second welding channel 211 and the first welding channel 11. For example, when the welding heat source is a laser welding assembly, the laser welding assembly can emit a welding laser from the side of the upper cover 20 away from the welding nozzle 10 through the second welding channel 211 and the first welding channel 11, thereby welding the workpiece. Thus, the nozzle mating part 21 of the upper cover 20 can cooperate with the nozzle body 13 to press the workpiece to be welded, and the exposed workpiece can be welded through the first welding channel 11 and the second welding channel 211, improving the welding quality.

[0071] Combination Figures 9-11 , Figure 9 This is a seventh structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application; Figure 10 This is an eighth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application; Figure 11 This is a ninth structural schematic diagram of a welding pressing assembly according to one or more embodiments of this application.

[0072] In some embodiments, the welding nozzle 10 is provided with a first suction groove 161, which communicates with the first welding channel 11. The nozzle mating part 21 covers the opening of the first suction groove 161. It should be noted that the first suction groove 161 can independently form the suction channel 16, or the first suction groove 161 can cooperate with the nozzle mating part 21 to form the suction channel 16. For example, the nozzle mating part 21 covers the opening of the first suction groove 161 and can cooperate with the first suction groove 161 to form the suction channel 16. Negative pressure can be applied to the first welding channel 11 through the suction channel 16, thereby drawing the gas in the first welding channel 11 out from the first suction groove 161. The first suction groove 161 is recessed relative to the nozzle mating portion 21. The first suction groove 161 can be formed on the nozzle connecting portion 12, or a portion of the first suction groove 161 can be formed on the nozzle connecting portion 12, with the remainder formed on the nozzle body portion 13. It is understood that during the process of gas being drawn out of the first welding channel 11 from the first suction groove 161, impurities such as welding slag and dust in the first welding channel 11 will also be drawn out from the first suction groove 161, thereby improving the cleanliness of the welding environment and improving welding quality. For example, the first suction groove 161 can be connected to a vacuum generator, thereby facilitating the application of negative pressure within the first suction groove 161.

[0073] In some embodiments, the nozzle mating part 21 is provided with a second suction groove 212, which communicates with the second welding channel 211. The nozzle connecting part 12 covers the opening of the second suction groove 212. It should be noted that the nozzle connecting part 12 covering the opening of the second suction groove 212 forms an air extraction channel with the second suction groove 212. Negative pressure can be applied to the second welding channel 211 through the air extraction channel, thereby drawing gas out of the second welding channel 211 from the second suction groove 212. The second suction groove 212 is recessed relative to the nozzle connecting part 12. It is understood that during the process of drawing gas out of the second welding channel 211 from the second suction groove 212, welding slag, dust, and other impurities in the first and second welding channels 11 will also be drawn out from the second suction groove 212, thereby improving the cleanliness of the welding environment and improving welding quality. For example, the second suction groove 212 can be connected to a vacuum generator, thereby facilitating the application of negative pressure to the second suction groove 212.

[0074] In some embodiments, the welding nozzle 10 is provided with a first suction groove 161, which communicates with the first welding channel 11. A nozzle mating part 21 covers the opening of the first suction groove 161, and the nozzle mating part 21 is provided with a second suction groove 212, which communicates with the second welding channel 211. A nozzle connecting part 12 covers the opening of the second suction groove 212. It is understood that the first suction groove 161 and the second suction groove 212 can cooperate to form a suction passage, through which a negative pressure can be applied to the first welding channel 11 and the second welding channel 211, thereby drawing the gas in the first welding channel 11 and the second welding channel 211 out through the first suction groove 161 and the second suction groove 212. Understandably, during the process of gas being drawn out of the first welding channel 11 and the second welding channel 211 from the first suction groove 161 and the second suction groove 212, impurities such as welding slag and dust in the first welding channel 11 and the second welding channel 211 will also be drawn out from the first suction groove 161 and the second suction groove 212, thereby improving the cleanliness of the welding environment and improving the welding quality. Therefore, by applying negative pressure to the first welding channel 11 through the first suction groove 161 and the second suction groove 212, welding slag in the first welding channel 11 and the second welding channel 211 can be removed, reducing the risk of welding slag adhering to the first welding channel 11 and the second welding channel 211 and contaminating the workpiece to be welded, thus improving the reliability of the welding nozzle 10.

[0075] In some embodiments, the welding nozzle 10 is further provided with a first air inlet channel 15, which communicates with the first welding channel 11. The nozzle mating part 21 is provided with a second air inlet channel 213, which communicates with the first air inlet channel 15. Exemplarily, the second air inlet channel 213 can penetrate the nozzle mating part 21 and communicate with the first air inlet channel 15. It should be noted that protective gas can be provided to the first air inlet channel 15 and the first welding channel 11 through the second air inlet channel 213, thereby protecting the workpiece to be welded during the welding process and reducing the risk of the workpiece reacting with air at high temperatures. Exemplarily, the second air inlet channel 213 can be connected to an air pump, thereby facilitating the pumping of protective gas into the second air inlet channel 213. In some applications, the welding pressing assembly 2 may also include a vortex tube connected to the second air intake channel 213. The protective gas can enter the second air intake channel 213 through the vortex tube, thereby reducing the temperature of the protective gas and improving its cooling efficiency on the welding nozzle 10. In some applications, the welding nozzle 10 may also have a suction channel 16 connected to the first welding channel 11. This suction channel 16 can apply negative pressure to the first welding channel 11, the first air intake channel 15, and the second welding channel 211, forming a unidirectional continuous protective gas flow between the first air intake channel 15, the first welding channel 11, and the suction channel 16. This improves the fluidity of the protective gas, enhances its cooling effect on the welding nozzle 10, and extends the service life of the welding nozzle 10. Therefore, the first air intake channel 15 and the second air intake channel 213 can cooperate to provide protective gas to the first welding channel 11, improve the welding quality, thereby improve the reliability of the welding nozzle 10, and the protective gas can absorb the welding heat, thereby enhancing the heat dissipation effect of the welding pressing assembly 2.

[0076] In some embodiments, combined with Figure 11The nozzle connecting portion 12 has first floating grooves 17 on opposite sides, and the nozzle mating portion 21 has second floating grooves 22 on opposite sides. The first wall portion 171 of the first floating groove 17, away from the nozzle body portion 13, is located within the second floating groove 22. The second wall portion 221 of the second floating groove 22, near the nozzle connecting portion 12, is located within the first floating groove 17. The first floating groove 17 is configured to allow the second wall portion 221 to move within it, and the second floating groove 22 is configured to allow the second wall portion 221 to move within it. It can be understood that the first wall portion 171 can move within the second floating groove 22, and the second wall portion 221 can move within the first floating groove, thereby enabling relative movement between the nozzle mating portion 21 and the nozzle connecting portion 12. For example, in the direction from the nozzle mating part 21 to the nozzle connecting part 12, the first floating groove 17 has two spaced-apart sidewalls, wherein the sidewall farther from the nozzle body part 13 is the first wall part 171. The second floating groove 22 also has two spaced-apart sidewalls, wherein the sidewall closer to the nozzle connecting part 12 is the second wall part 221. The first wall part 171 is located between the second wall part 221 and the other sidewall of the second floating groove 22, and can move between the second wall part 221 and the other sidewall of the second floating groove 22. The second wall part 221 is located between the first wall part 171 and the other sidewall of the first floating groove 17, and can move between the first wall part 171 and the other sidewall of the first floating groove 17. The nozzle connecting part 12 can be made of a material with high strength and toughness, such as, but not limited to, SUS16 stainless steel. It should be noted that during the welding process, the relative movement frequency between the first wall portion 171 and the second wall portion 221 is relatively high, and direct contact and collision are likely to occur between them. By forming the nozzle connection portion 12 with a material of high strength and toughness, the structural stability of the first wall portion 171 can be improved, and the service life of the welding pressing assembly 2 can be extended. In some application scenarios, the welding pressing assembly 2 also includes an elastic element, which can be deformably connected between the upper cover 20 and the welding nozzle 10 along the pressing direction of the welding nozzle 10. The elastic element may include, but is not limited to, springs, rubber pads, etc. It can be understood that the elastic element can make the connection between the upper cover 20 and the welding nozzle 10 more stable, making the welding process smoother, and allowing the welding nozzle 10 to press elastically against the workpiece to be welded, enabling more flexible adjustment of the pressing force of the welding nozzle 10 on the workpiece to be welded. Thus, by moving the first wall portion 171 within the first floating groove and the second wall portion 221 within the second floating groove, the nozzle mating portion 21 and the nozzle connecting portion 12 can move relative to each other, thereby flexibly adjusting the pressing force of the welding pressing assembly 2 on the workpiece to be welded and improving the stability of the welding.

[0077] In some embodiments, there are at least two welding nozzles 10, located on the same side of the upper cover 20. The upper cover 20 is provided with at least two nozzle mating parts 21, with each welding nozzle 10 corresponding to one nozzle mating part 21. For example, taking two welding nozzles 10 and two nozzle mating parts 21 as an example, one welding nozzle 10 is correspondingly set with one nozzle mating part 21, and the other welding nozzle 10 is correspondingly set with the other nozzle mating part 21. It can be understood that the welding pressing assembly 2 can simultaneously press two parts to be welded using the two welding nozzles 10. For example, when the part to be welded is an adapter piece 33, the welding pressing assembly 2 can press and position one adapter piece 33 at the positive electrode terminal using one welding nozzle 10, and press and position the other adapter piece 33 at the negative electrode terminal using the other welding nozzle 10, so that one adapter piece 33 is simultaneously welded to the positive electrode terminal and the other adapter piece 33 is simultaneously welded to the negative electrode terminal. Therefore, by setting at least two welding nozzles 10 and nozzle mating parts 21, it is convenient for the welding pressing assembly 2 to press and weld at least two parts to be welded at the same time, thereby improving production efficiency.

[0078] In summary, the welding pressing assembly 2 provided in this application includes a welding nozzle 10, which has a first welding channel 11. The welding nozzle 10 includes a nozzle connecting portion 12 and a nozzle body portion 13. The heat resistance of the nozzle body portion 13 is greater than that of the nozzle connecting portion 12. The nozzle body portion 13 and the nozzle connecting portion 12 are connected. The nozzle body portion 13 is used to press the workpiece to be welded. The first welding channel 11 penetrates the nozzle connecting portion 12 and the nozzle body portion 13 to expose part of the workpiece to be welded. Thus, the workpiece to be welded can be pressed by the nozzle body portion 13, and welding can be performed on the exposed workpiece through the first welding channel 11. The heat resistance of the nozzle body portion 13 is greater than that of the nozzle connecting portion 12, which allows the welding nozzle 10 to better withstand the heat generated during the welding process, reducing the risk of overheating and deformation of the welding nozzle 10, thereby improving the service life of the welding pressing assembly 2. Compared with other welding pressing components, the welding pressing component 2 provided in this application has better heat resistance, higher reliability, and longer service life.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application 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 or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A welding pressing assembly, characterized in that, The welding pressing assembly includes: A welding nozzle has a first welding channel. The welding nozzle includes a nozzle connecting part and a nozzle body part. The heat resistance of the nozzle body part is greater than that of the nozzle connecting part. The nozzle body part and the nozzle connecting part are connected. The nozzle body part is used to press the workpiece to be welded. The first welding channel passes through the nozzle connecting part and the nozzle body part to expose part of the workpiece to be welded.

2. The welding pressing assembly according to claim 1, characterized in that, The welding nozzle includes a nozzle contact portion, which is connected to the nozzle body portion on the side opposite to the nozzle connection portion. The nozzle body portion presses the workpiece to be welded through the nozzle contact portion.

3. The welding pressing assembly according to claim 2, characterized in that, The thickness of the nozzle contact portion is greater than or equal to 1 mm and less than or equal to 2 mm.

4. The welding pressing assembly according to claim 1, characterized in that, The nozzle body is provided with a heat dissipation structure on the side opposite to the first welding channel.

5. The welding pressing assembly according to claim 4, characterized in that, The heat dissipation structure includes a heat dissipation protrusion, which protrudes from the side of the nozzle body away from the first welding channel.

6. The welding pressing assembly according to claim 5, characterized in that, The heat dissipation structure includes a heat dissipation groove, which is located on the side of the nozzle body opposite to the first welding channel.

7. The welding pressing assembly according to claim 1, characterized in that, The welding nozzle is also provided with a first air inlet channel, which is connected to the first welding channel.

8. The welding pressing assembly according to claim 1, characterized in that, The welding nozzle is also provided with an air intake channel, which is connected to the first welding channel.

9. The welding pressing assembly according to any one of claims 1 to 6, characterized in that, The welding pressing assembly includes an upper cover, which is connected to the nozzle connecting part on the side opposite to the nozzle body. The upper cover is provided with a nozzle mating part, which is provided with a second welding channel, and the second welding channel is connected to the first welding channel.

10. The welding pressing assembly according to claim 9, characterized in that, The welding nozzle is provided with a first suction groove, the first suction groove is connected to the first welding channel, and the nozzle mating part covers the opening of the first suction groove; And / or, the nozzle mating part is provided with a second suction groove, the second suction groove is connected to the second welding channel, and the nozzle connecting part is covered by the groove of the second suction groove.

11. The welding pressing assembly according to claim 9, characterized in that, The welding nozzle is further provided with a first air inlet channel, which is connected to the first welding channel. The nozzle mating part is provided with a second air inlet channel, which is connected to the first air inlet channel.

12. The welding pressing assembly according to claim 9, characterized in that, The nozzle connecting part is provided with a first floating groove on both sides, and the nozzle mating part is provided with a second floating groove on both sides. The first wall portion of the first floating groove away from the nozzle body is located in the second floating groove, and the second wall portion of the second floating groove close to the nozzle connecting part is located in the first floating groove. The first floating groove is configured to allow the second wall portion to move within the first floating groove, and the second floating groove is configured to allow the second wall portion to move within the second floating groove.

13. The welding pressing assembly according to claim 9, characterized in that, There are at least two welding nozzles, and the at least two welding nozzles are located on the same side of the upper cover. The upper cover is provided with at least two nozzle mating parts, and each welding nozzle corresponds to one nozzle mating part.

14. A welding apparatus, characterized in that, The welding apparatus includes a welding pressing assembly as described in any one of claims 1 to 13.

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