Negative-pressure suction nozzle assembly, suction nozzle, and lithium battery formation device

Abstract

Disclosed are a negative-pressure suction nozzle assembly, a suction nozzle, and a lithium battery formation device. The negative-pressure suction nozzle assembly comprises: a suction nozzle, the suction nozzle comprising a suction nozzle body, the suction nozzle body being formed along a first direction with a suction channel that penetrates through, the suction nozzle body comprising a first end and a second end along the first direction, and the first end being used for assembling with an opening of a battery; and a guide member, the guide member comprising a guide body and a guide portion, the guide body being provided at the outer periphery of the suction nozzle body, an assembly gap being provided between the guide body and the outer periphery of the suction nozzle body, the guide portion being provided at a first end of the guide body, the first end of the guide body protruding from the first end of the suction nozzle body in a first direction, and the guide portion being used for providing guidance for assembling an opening of a battery to the assembly gap.

Description

A negative pressure suction nozzle assembly, a suction nozzle, and a lithium battery formation device

[0001] This application claims priority to Chinese patent application No. 202422499661.5 filed on October 15, 2024, and Chinese patent application No. 202422499646.0 filed on October 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of semiconductor technology, and in particular to a negative pressure suction nozzle assembly, a suction nozzle, and a lithium battery formation device. Background Technology

[0003] During the formation process in the lithium battery production line, some gases are generated. Therefore, negative pressure cups and nozzles are used to draw and collect these gases during formation. The nozzles are tightly connected to the openings of the open batteries to create a seal, preventing the battery's interior from contacting the external atmosphere. This ensures that the negative pressure environment inside the battery is not disturbed by outside air during formation, guaranteeing the stability and consistency of the formation process. However, when the open batteries are pressed together by cylinders during operation, the nozzles may not be precisely positioned relative to the battery openings. This can cause the nozzle's suction channel to deviate from the cell's electrolyte filling port, preventing the proper negative pressure extraction. Invention Overview

[0004] According to a first aspect of this application, a negative pressure suction nozzle assembly is disclosed for use in a lithium battery formation device to connect a negative pressure cup and a battery opening, comprising:

[0005] The suction nozzle includes a suction nozzle body, which has a through suction channel formed along a first direction. The suction nozzle body includes a first end and a second end along the first direction, and the first end is used to assemble with the opening of the battery.

[0006] A guide member, comprising a guide body and a guide portion, wherein the guide body is disposed on the outer periphery of the nozzle body and there is an assembly gap between the guide body and the outer periphery of the nozzle body, and the guide portion is disposed at a first end of the guide body, the first end of the guide body protruding beyond the first end of the nozzle body in a first direction, and the guide portion is used to provide guidance for assembling the opening of the battery into the assembly gap.

[0007] According to a second aspect of this application, a suction nozzle is also disclosed for use on a lithium battery formation device to connect a negative pressure cup and an opening of a battery, and to cooperate with a guide member. The nozzle includes a nozzle body, wherein a through adsorption channel is formed along a first direction, and the nozzle body includes a first end and a second end along the first direction. The first end is used to assemble with the opening of the battery, and the second end of the nozzle body is formed with a first protrusion along the first direction. The first protrusion is used to cooperate with a clearance hole of the guide member.

[0008] According to a third aspect of this application, a lithium battery formation apparatus is also disclosed, including a mounting frame, a negative pressure cup, and a negative pressure nozzle assembly. The negative pressure cup is mounted on the mounting frame, and the negative pressure nozzle assembly is connected to the negative pressure cup. The negative pressure nozzle assembly includes the negative pressure nozzle assembly described in any of the above embodiments; or...

[0009] It includes a mounting bracket, a negative pressure cup, and a suction nozzle. The negative pressure cup is mounted on the mounting bracket, and the suction nozzle is connected to the negative pressure cup. The suction nozzle includes the suction nozzle described in any of the above embodiments.

[0010] The beneficial effects of this application include at least the following:

[0011] In the negative pressure suction nozzle assembly and lithium battery formation equipment provided in this application, the suction nozzle includes a suction nozzle body. The suction nozzle body forms a through adsorption channel along a first direction, which is used to provide a flow channel for gas and overflowing electrolyte when the lithium battery formation equipment is working, so that the inside of the battery cell is connected to the negative pressure cup under negative pressure. The first end is used for assembly with the opening of the battery, ensuring a tight connection between the suction nozzle and the opening of the battery, preventing gas leakage and electrolyte overflow. The guide includes a guide body, which is located on the outer periphery of the suction nozzle body and has an assembly gap with the suction nozzle body, which can provide a certain assembly space for the opening of the battery, so that the opening of the battery can be inserted and connected to the suction nozzle. The guide part is located at the first end of the guide body and protrudes from the first end of the suction nozzle body in the first direction. During the assembly process, it provides guidance for the opening of the battery. When the opening of the battery deviates, it guides the opening of the battery to smoothly enter the assembly gap, ensuring the accuracy and efficiency of the assembly. The guide section provides clear guidance for the battery opening to the assembly gap, allowing for quick and accurate alignment of the battery opening with the suction nozzle for assembly. This enables the suction channel of the nozzle to align with the liquid injection port of the battery cell to complete the negative pressure action, reducing assembly time and error rate, and improving production efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, 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.

[0013] Figure 1 is a schematic diagram of a negative pressure suction nozzle assembly provided in an embodiment of this application;

[0014] Figure 2 is a magnified view of part A in Figure 1;

[0015] Figure 3 is a schematic diagram of the structure of a negative pressure suction nozzle assembly display manifold provided in an embodiment of this application;

[0016] Figure 4 is a magnified view of part B in Figure 3;

[0017] Figure 5 is one of the structural schematic diagrams of a guide component of a negative pressure suction nozzle assembly provided in an embodiment of this application;

[0018] Figure 6 is a second schematic diagram of the structure of a guide component of a negative pressure suction nozzle assembly provided in an embodiment of this application;

[0019] Figure 7 is one of the structural schematic diagrams of the suction nozzle provided in the embodiment of this application;

[0020] Figure 8 is a magnified view of part C in Figure 7;

[0021] Figure 9 is a second schematic diagram of the structure of the suction nozzle provided in the embodiment of this application;

[0022] Figure 10 is a schematic diagram of the structure of the magnetic component provided in an embodiment of this application;

[0023] Figure 11 is a third schematic diagram of the structure of the suction nozzle provided in the embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10-Nose; 11-Nose body; 111-Adsorption channel; 112-First cylindrical surface; 113-First elastic boss; 1131-First elastic protruding ring; 1132-Second elastic protruding ring; 114-First boss; 1141-Elastic flange; 1142-Third elastic protruding ring; 115-Ring groove; 116-Magnetic component; 1161-Second clearance hole; 1162-Third clearance hole; 117-Conical adsorption surface; 1171-Reinforcing support protrusion;

[0026] 20-Guide component; 21-Guide body; 211-Second cylindrical surface; 22-Guide part; 221-Guide inclined surface; 2211-Frustoconical surface; 23-Connecting part; 231-First clearance hole; 2311-Counterpart; 232-Anti-rotation part;

[0027] 30 - Assembly clearance; 40 - Clearance clearance; 50 - Mounting bracket; 60 - Negative pressure cup; 70 - Battery. Implementation methods of this application

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In this application, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0031] During the formation process in the lithium battery production line, some gases are generated. Therefore, negative pressure cups and nozzles are used to draw and collect these gases during formation. The nozzles are tightly connected to the openings of the open batteries to create a seal, preventing the battery's interior from contacting the external atmosphere. This ensures that the negative pressure environment inside the battery is not disturbed by outside air during formation, guaranteeing the stability and consistency of the formation process. However, when the open batteries are pressed together by cylinders during operation, the nozzles may not be precisely positioned relative to the battery openings. This can cause the nozzle's suction channel to deviate from the cell's electrolyte filling port, preventing the proper negative pressure extraction.

[0032] In view of this, some embodiments of this application provide a negative pressure suction nozzle assembly, a suction nozzle, and a lithium battery formation device, which can provide guidance for the opening of the battery during the assembly process. When the opening of the battery deviates, it guides the opening of the battery to smoothly enter the assembly gap, ensuring the accuracy and efficiency of the assembly. The setting of the guide part provides a clear guide for the battery opening to be assembled into the assembly gap, which can quickly and accurately align the opening of the battery with the suction nozzle for assembly, so that the suction channel of the suction nozzle is aligned with the liquid injection port of the battery cell to complete the negative pressure action, reducing assembly time and error rate, and improving production efficiency.

[0033] The present application will be described in detail below through specific embodiments:

[0034] The negative pressure suction nozzle assembly of this application embodiment is used in a lithium battery formation device for connecting a negative pressure cup 60 and a battery 70 through an opening, as shown in Figures 1 to 8, and includes:

[0035] The suction nozzle 10 includes a suction nozzle body 11, which has a through suction channel 111 formed along a first direction. The suction nozzle body 11 includes a first end and a second end along the first direction, and the first end is used to assemble with the opening of the battery 70.

[0036] The guide 20 includes a guide body 21 and a guide portion 22. The guide body 21 is disposed on the outer periphery of the mouthpiece body 11, and there is an assembly gap 30 between the guide body 21 and the outer periphery of the mouthpiece body 11. The guide portion 22 is disposed at the first end of the guide body 21, and the first end of the guide body 21 protrudes from the first end of the mouthpiece body 11 in a first direction. The guide portion 22 is used to provide guidance for assembling the opening of the battery 70 into the assembly gap 30.

[0037] The negative pressure suction nozzle assembly provided in this application embodiment includes a suction nozzle 10 comprising a suction nozzle body 11. The suction nozzle body 11 forms a through adsorption channel 111 along a first direction, which is used to provide a flow channel for gas and overflowing electrolyte when the lithium battery formation equipment is working, so that the inside of the battery 70 is connected to the negative pressure cup 60 under negative pressure. The first end is used to assemble with the opening of the battery 70, ensuring a tight connection between the suction nozzle 10 and the opening of the battery 70, ensuring the accurate positioning between the adsorption channel 111 of the suction nozzle 10 and the electrolyte injection port of the battery cell, and preventing gas leakage and electrolyte overflow. The guide member 20 includes a guide body 21, which is disposed on the outer periphery of the suction nozzle body 11 and has an assembly gap 30 between it and the suction nozzle body 11, which can provide a certain assembly space for the opening of the battery 70, so that the opening of the battery 70 can be inserted and connected to the suction nozzle 10. The guide portion 22 is located at the first end of the guide body 21 and protrudes from the first end of the nozzle body 11 in a first direction. During assembly, it provides guidance for the opening of the battery 70. When the opening of the battery 70 deviates, it guides the opening of the battery 70 smoothly into the assembly gap 30, ensuring the accuracy and efficiency of the assembly. The configuration of the guide portion 22 provides clear guidance for the assembly of the opening of the battery 70 into the assembly gap 30, allowing the opening of the battery 70 to be quickly and accurately aligned with the nozzle 10 for assembly. This enables the suction channel 111 of the nozzle 10 to align with the liquid injection port of the battery cell to complete the negative pressure action, reducing assembly time and error rate, and improving production efficiency.

[0038] The first direction is the direction indicated by arrow X in Figure 7, which is also the adsorption direction of the nozzle 10.

[0039] The guide portion 22 can be implemented in various ways. In one possible implementation, the guide portion 22 is a guide slope 221. The guide slope 221 is disposed on the side of the first end of the guide body 21 facing the nozzle body 11. The lower edge of the guide slope 221 is radially away from the nozzle body 11 compared to the upper edge of the guide slope 221.

[0040] The guide ramp 221 provides a gradually narrowing guide path for the opening of the battery 70. When the opening of the battery 70 approaches the first end of the nozzle body 11, the lower edge of the guide ramp 221 first contacts the opening of the battery 70. As the opening of the battery 70 continues to approach, guided by the ramp, the opening of the battery 70 will naturally slide along the ramp towards the nozzle body 11, accurately entering the assembly gap 30. This gradual guidance method makes the assembly process smoother and reduces assembly difficulties and time waste caused by inaccurate alignment. Due to the presence of the guide ramp 221, the initial alignment accuracy requirement between the opening of the battery 70 and the nozzle 10 assembly is relatively reduced. Even if the opening of the battery 70 deviates from the center position of the nozzle body 11 within a certain range, the guide ramp 221 can still guide the opening of the battery 70 to the correct assembly position through its large guiding range. In actual production, this can reduce assembly problems caused by factors such as equipment precision and operational errors, and improve the feasibility and stability of production.

[0041] In other possible implementations, the guide portion 22 may also be a guide surface, or the guide portion may be provided with guide rollers or the like to provide guidance for the opening of the battery 70.

[0042] Specifically, as shown in Figures 5 and 6, the outer peripheral surface of the suction nozzle body 11 is a first cylindrical surface 112, and as shown in Figure 11, the inner surface of the guide body 21 used to form the assembly gap 30 is a second cylindrical surface 211. The first cylindrical surface 112 and the second cylindrical surface 211 are coaxially arranged.

[0043] The coaxial arrangement ensures that the nozzle body 11 and the guide body 21 have the same central axis in the radial direction. When the opening of the battery 70 enters the assembly gap 30 along the guide portion 22, the concentricity of the opening of the battery 70 and the nozzle body 11 is guaranteed. This ensures the accuracy of the assembly and avoids problems such as loose connection and poor sealing caused by eccentricity. After the opening of the battery 70 is connected to the nozzle 10, the coaxial cylindrical design ensures that the assembly gap 30 between the nozzle body 11 and the guide body 21 is evenly distributed in the circumferential direction. This ensures that the opening of the battery 70 is subjected to uniform force in all directions, avoiding deformation or damage caused by excessive local force. During the lithium battery formation process, uniform force helps maintain the stability of the connection and prevents loosening or leakage due to external forces.

[0044] In this embodiment, the outer peripheral surface of the suction nozzle body 11 is a cylindrical surface. Correspondingly, the inner surface of the guide body 21 used to form the assembly gap 30 is an arc-shaped cylindrical surface coaxial with the cylindrical surface. Of course, in other embodiments, the inner surface of the guide body 21 used to form the assembly gap 30 may not be coaxial with the outer peripheral surface of the suction nozzle body 11, or both may be set as prism surfaces. This is not limited here.

[0045] Optionally, as shown in Figures 5 and 6, the guide slope 221 is a frustum surface 2211, and the smaller end of the frustum surface 2211 is connected to the second cylindrical surface 211.

[0046] The shape of the frustum surface 2211 provides a transition area that gradually narrows from a larger diameter to a smaller diameter. When the opening of the battery 70 approaches the negative pressure nozzle assembly, the larger diameter end of the frustum surface 2211 first provides a wider guiding range for the opening of the battery 70, making it easier for the opening of the battery 70 to enter the guiding area. As the opening of the battery 70 gradually moves towards the smaller diameter end along the frustum surface 2211, its position is continuously adjusted and precisely guided, eventually accurately entering the assembly gap 30 with the nozzle body 11. This gradually narrowing guiding method can achieve more precise assembly guidance, improving the accuracy and efficiency of assembly.

[0047] In this embodiment, as shown in Figures 7 to 9, a first elastic boss 113 is formed at the first end of the nozzle body 11 along the first direction, and the outer peripheral wall of the first elastic boss 113 is used to cooperate with the reduced diameter portion of the opening of the battery 70.

[0048] The first elastic protrusion 113 can fit tightly against the narrowed portion of the opening of the battery 70. Due to its elasticity, it can generate a certain pressure on the contact surface, forming a good seal. During the formation process, the relative position between the nozzle 10 and the opening of the battery 70 may change slightly due to factors such as temperature changes and vibration. The first elastic protrusion 113 can adapt to these changes through its own elastic deformation, always maintaining a good seal. When the first elastic protrusion 113 engages with the narrowed portion of the opening of the battery 70, the elastic protrusion generates a certain frictional force and clamping force, making the connection between the nozzle 10 and the opening of the battery 70 more secure. This can effectively prevent the nozzle 10 from accidentally loosening or falling off during operation, ensuring the smooth progress of the formation process.

[0049] Of course, in other embodiments, the first end of the nozzle body 11 can also be directly fitted with the opening of the battery 70 to ensure a tight seal after fitting.

[0050] Optionally, as shown in FIG8, a first elastic protrusion ring 1131 is provided on the outer peripheral wall of the first elastic protrusion 113, and the first elastic protrusion ring 1131 is used to cooperate with the reduced diameter portion of the opening of the battery 70.

[0051] The first elastic protrusion 113 itself can already form a certain seal with the narrowed diameter of the opening of the battery 70. Adding the first elastic protrusion ring 1131 on this basis is equivalent to adding another layer of sealing protection, which can significantly improve the reliability of the seal and effectively prevent leakage of gas and electrolyte during the lithium battery formation process. During the lithium battery formation process, the internal pressure may change. The first elastic protrusion ring 1131 can elastically deform according to the pressure changes, better adapting to different pressure conditions.

[0052] Alternatively, a sealing ring or elastic gasket may be provided on the outer peripheral wall of the first elastic boss 113 to achieve a seal between the first elastic boss 113 and the opening of the battery 70.

[0053] Optionally, as shown in FIG8, a second elastic protrusion ring 1132 is provided on the outer edge of the nozzle body 11. The second elastic protrusion ring 1132 is used to cooperate with the reduced diameter portion of the opening of the battery 70, and a deformation space is formed between the first elastic protrusion ring 1131 and the second elastic protrusion ring 1132.

[0054] The first elastic protruding ring 1131 and the second elastic protruding ring 1132 work together to cooperate with the narrowed diameter portion of the opening of the battery 70, forming a deformation space. This greatly improves the reliability of the seal and effectively prevents leakage of gas and electrolyte during the lithium battery formation process, ensuring a stable formation environment. Protruding rings at different positions can contact the opening of the battery 70 from different angles and positions, adapting to any slight irregularities in the opening of the battery 70, further enhancing the sealing performance. The second elastic protruding ring 1132 increases the contact area and clamping force with the opening of the battery 70. Together with the first elastic protruding ring 1131, it makes the connection between the nozzle 10 and the opening of the battery 70 more secure. Even under vibration, external impact, or other conditions, it effectively prevents the nozzle 10 from loosening or falling off, ensuring the smooth progress of the formation process.

[0055] The guide member 20 can be fixed in various ways. In one possible implementation, as shown in FIG7, the guide member 20 further includes a connecting part 23, which is located at the second end of the guide body 21 and is used to connect with the lithium battery formation equipment.

[0056] Therefore, the connecting part 23 connects the guide 20 to the lithium battery formation equipment, ensuring that the guide 20 maintains a stable position during operation. This, combined with the suction nozzle 10, ensures a good fit between the nozzle 10 and the opening of the battery 70, preventing displacement or loosening of the negative pressure suction nozzle assembly and ensuring the smooth progress of the formation process. The design of the connecting part 23 typically considers the need for quick connection and disassembly from the lithium battery formation equipment. For example, the connecting part 23 may have screw holes, allowing the guide 20 to be connected to the lithium battery formation equipment using bolts. This also facilitates easy removal of the guide 20 from the lithium battery formation equipment, improving operational convenience and efficiency.

[0057] Specifically, as shown in Figures 2, 5 and 7, a first boss 114 is formed at the second end of the nozzle body 11 along the first direction, and a first clearance hole 231 is formed on the connecting part 23 along the first direction. The first boss 114 is disposed in the first clearance hole 231 and has a clearance gap 40 with the first clearance hole 231.

[0058] The first protrusion 114 is located within the first clearance hole 231, serving a positioning function during installation. Installers can accurately insert the first protrusion 114 into the first clearance hole 231 to quickly determine the relative position of the nozzle body 11 and the connecting part 23, thereby improving installation efficiency and accuracy. Since the negative pressure cup 60 rod is inserted into the nozzle body 11 via an interference fit, the clearance gap 40 allows for fine-tuning of the nozzle body 11 within a certain range when the negative pressure cup 60 rod is installed, adapting to installation conditions. Simultaneously, the clearance gap 40 facilitates disassembly when maintenance or replacement of the nozzle body 11 or the guide 20 is required.

[0059] Of course, in other embodiments, the outer peripheral wall of the second end of the suction nozzle body 11 may be disposed in the first clearance hole 231 of the connecting portion 23 and have a clearance gap 40 with the first clearance hole 231.

[0060] In this embodiment, as shown in FIG7, the guide body 21 includes multiple clearance notches, which are spaced apart around the outer periphery of the nozzle body 11. The outer peripheral wall of the nozzle body 11 is provided with an annular groove 115, and a disassembly space is formed between the annular groove 115 and the multiple clearance notches.

[0061] Multiple clearance notches are spaced around the outer periphery of the nozzle body 11, creating a disassembly space without excessively occupying additional space. This optimizes space utilization while ensuring ease of disassembly, resulting in a more compact and rational structure for the entire negative pressure nozzle assembly. The disassembly space provides ample operating space for disassembly tools. When disassembly of the nozzle 10 is required, the operator can insert tools into the disassembly space to easily clamp or pry the nozzle body 11 for quick disassembly.

[0062] In other possible disassembly methods, such as disassembly from the first and second ends of the nozzle body 11, the annular groove 115 may not be provided, or a protrusion may be provided on the outer peripheral wall of the nozzle body 11 at a position corresponding to, for example, an avoidance notch, so that the operator can hold the protrusion to disassemble.

[0063] In another possible implementation, as shown in FIG9, the guide 20 further includes a connecting portion 23, which is disposed at the second end of the guide body 21 and is used to connect with the suction nozzle 10.

[0064] The connecting part 23 is connected to the nozzle 10. The connecting part 23 serves as a connecting bridge between the guide body 21 and the nozzle 10, providing a more secure connection. The connecting part 23 can ensure that the connection between the guide 20 and the nozzle 10 will not easily loosen or separate, and at the same time, it can also ensure the relative positional stability between the guide 20 and the nozzle 10, thereby enhancing the structural stability of the negative pressure nozzle assembly.

[0065] Specifically, as shown in Figure 9, a first clearance hole 231 is formed on the connecting part 23 along the first direction, and a first boss 114 is formed on the second end of the suction nozzle body 11 along the first direction. The first boss 114 is disposed in the first clearance hole 231, and an elastic flange 1141 is provided on the edge of the first boss 114. The elastic flange 1141 overlaps with the edge of the first clearance hole 231.

[0066] The first protrusion 114 is disposed within the first clearance hole 231, providing positioning and support for the connection between the nozzle body 11 and the connecting part 23. The elastic flange 1141 overlaps with the edge of the first clearance hole 231, further increasing the tightness and firmness of the connection and preventing loosening or separation between the nozzle body 11 and the connecting part 23. The elasticity of the elastic flange 1141 allows it to automatically deform during insertion, smoothly entering the first clearance hole 231 and overlapping with the edge of the hole, making the installation and disassembly process simpler and faster, and improving production efficiency. This connection structure design is compact and does not occupy too much space.

[0067] The elastic flange 1141 can be directly overlapped above the edge of the first clearance hole 231. In order to improve the assembly reliability, as shown in Figures 4 and 6, the edge of the first clearance hole 231 is provided with a groove 2311, and the elastic flange 1141 overlaps in the groove 2311.

[0068] The recess 2311 provides a specific receiving space for the elastic flange 1141, allowing the elastic flange 1141 to engage more tightly with the edge of the hole. This embedded connection method increases the contact area and friction of the connection, thereby significantly improving the connection strength between the nozzle body 11 and the connecting part 23. The recess 2311 can also serve a positioning and guiding function, ensuring that the elastic flange 1141 is accurately overlapped in the predetermined position. During installation, the operator can more easily insert the first boss 114 of the nozzle body 11 into the first clearance hole 231 and allow the elastic flange 1141 to smoothly enter the recess 2311. This design is more compact and efficient, making full use of limited space.

[0069] In this embodiment, as shown in FIG4, the outer peripheral wall of the first boss 114 is interference-fitted with the inner wall of the first clearance hole 231.

[0070] The interference fit creates a tight bond between the first boss 114 and the first clearance hole 231, preventing relative displacement during use and effectively preventing gas and liquid leakage. During installation, the installer can more easily and accurately insert the nozzle body 11 into the connecting part 23, ensuring correct installation position without requiring additional space for fasteners or other connecting devices, thus improving installation efficiency.

[0071] In other possible implementations, the outer peripheral wall of the first boss 114 and the inner wall of the first clearance hole 231 may also be connected by threads, or a sealing ring may be fitted between them for assembly.

[0072] Optionally, as shown in Figure 9, the outer peripheral wall of the first boss 114 is provided with a third elastic protrusion ring 1142.

[0073] The third elastic protruding ring 1142 can generate additional friction and clamping force when the first boss 114 contacts the inner wall of the first clearance hole 231, and can also withstand some deformation. When the negative pressure cup 60 rod is inserted into the nozzle body 11, the elastic characteristics of the third elastic protruding ring 1142 can adapt to this dimensional change, and ensure the tightness of the connection through its own deformation. At the same time, the third elastic protruding ring 1142 can further enhance the sealing performance and effectively prevent gas and liquid leakage.

[0074] Specifically, as shown in Figure 9, the number of third elastic protrusions 1142 is set to multiple, and the multiple third elastic protrusions 1142 are axially distributed along the outer peripheral surface of the first boss 114.

[0075] Multiple third elastic protrusions 1142 provide multiple clamping forces at different positions. When the first protrusion 114 is inserted into the first clearance hole 231, the connection between the nozzle body 11 and the connecting part 23 becomes more secure. During the connection process, a certain amount of stress is generated due to the interference fit and the action of the elastic protrusions. The distribution of multiple third elastic protrusions 1142 can disperse the stress to different positions, reduce local stress concentration, and extend the service life of the connecting part 23.

[0076] For example, there are two third elastic protrusions 1142. Of course, in other embodiments, there may be one, three or more third elastic protrusions 1142, which is not limited here.

[0077] In this embodiment, as shown in Figures 4 and 6, the connecting part 23 is provided with an anti-rotation part 232, which is used for locking the lithium battery formation equipment to prevent the guide 20 from rotating relative to the nozzle 10.

[0078] During the operation of lithium battery formation equipment, various vibrations and external forces may occur. If the guide member 20 rotates relative to the nozzle 10, it may cause the connection to loosen, affecting the normal operation of the equipment. The anti-rotation part 232 can effectively prevent the guide member 20 from rotating, ensuring that the connection between the nozzle 10 and the guide member 20 remains firm, thus improving the stability and reliability of the equipment. Alternatively, a stop member can be provided on the nozzle body 11, which cooperates with the connecting part to prevent the guide member 20 from rotating relative to the nozzle 10.

[0079] In one possible implementation, as shown in FIG6, the anti-rotation part 232 includes a positioning pin that extends in a first direction toward a direction away from the nozzle 10.

[0080] The positioning pin provides a clear positioning constraint in the first direction and can precisely match the corresponding mating structure (such as positioning hole or slot) on the lithium battery formation equipment to ensure that the guide 20 cannot rotate in this direction. This effectively prevents the connection from becoming loose or the position from deviating due to the accidental rotation of the guide 20, and ensures the accurate docking and stable connection between the nozzle 10 and the opening of the battery 70. The positioning pin usually has a certain strength and rigidity and can withstand a large external force without deformation or damage.

[0081] In another possible implementation, the positioning pin can also extend along the first direction toward the direction close to the nozzle 10, and a corresponding positioning groove can be provided on the nozzle body 11.

[0082] In this embodiment, as shown in Figures 9 and 10, a magnetic component 116 is provided inside the suction nozzle body 11. This allows the negative pressure suction nozzle assembly to be easily removed by magnetic attraction, making it convenient to use and disassemble. Exemplarily, the magnetic component 116 can be a metal component or a plastic component containing magnetic materials, etc., and is not limited thereto.

[0083] The magnetic component 116 can be implemented in various ways. For example, as shown in Figure 10, the magnetic component 116 has a conical structure. The large-diameter end of the conical structure is close to the first end of the nozzle body 11, and the middle of the conical structure is provided with a second clearance hole 1161 corresponding to the adsorption channel 111. Since the large-diameter end of the conical structure is close to the first end of the nozzle body 11, when the magnetic component 116 is subjected to force, the force acts towards the edge of the first end of the nozzle body 11, so that the force is directed towards the contact point between the nozzle body 11 and the opening of the battery 70, further improving the sealing effect.

[0084] Alternatively, in other embodiments, the magnetic element 116 may be a plurality of magnetic particles or magnetic sheets distributed in the nozzle body 11.

[0085] In this embodiment, as shown in Figure 10, the conical structure is provided with a third clearance hole 1162, which is used to avoid the injection molding liquid. In the manufacturing process of the nozzle body 11, injection molding is typically used. Providing the third clearance hole 1162 allows the injection molding liquid to flow more smoothly in the mold, avoiding interference from the magnetic component 116 on the injection molding process. This ensures that the nozzle body 11 can be completely formed, improving production efficiency and product quality.

[0086] In this embodiment, as shown in FIG11, a conical adsorption surface 117 is formed at the first end of the nozzle body 11, and the adsorption channel 111 passes through the small diameter end of the conical adsorption surface 117.

[0087] Compared to a planar adsorption surface, the conical adsorption surface 117 has a larger surface area, providing a larger adsorption area when in contact with the electrolyte injection port of the battery cell. This enhances the adsorption capacity for gases and any potentially overflowing electrolyte, improving adsorption stability. The shape of the conical adsorption surface 117 guides the flow of gas and electrolyte towards the adsorption channel 111. Since the smaller diameter end is located at the center of the conical adsorption surface 117, the gas and electrolyte are more easily concentrated and flow towards the adsorption channel 111 under the guidance of the conical surface, improving adsorption efficiency.

[0088] Of course, in other embodiments, for ease of manufacture and simple structure, the first end of the nozzle body 11 can also be set as a horizontal adsorption surface.

[0089] Optionally, the conical adsorption surface 117 is provided with a plurality of reinforcing support protrusions 1171 surrounding the adsorption channel 111. Exemplarily, the reinforcing support protrusions 1171 can be provided with a wedge-shaped structure as shown in FIG11, or they can be provided with a ring-shaped structure, which is not limited here.

[0090] When the conical adsorption surface 117 is aligned with the liquid injection port of the battery cell and subjected to various external forces, it is prone to deformation or damage. The setting of the reinforced support protrusion 1171 can increase the strength of the conical adsorption surface 117 in key parts, improve its ability to resist external forces, disperse local stress, prevent the conical adsorption surface 117 from being excessively deformed under pressure, thereby extending the service life of the nozzle 10, preventing the adsorption surface from collapsing, and ensuring the unobstructed adsorption channel 111 and the normal operation of the negative pressure system.

[0091] This application also discloses a suction nozzle. The suction nozzle 10 of this application embodiment is used in a lithium battery formation device to connect the opening of the negative pressure cup and the battery, and cooperates with the guide member. As shown in Figures 7 to 11, the suction nozzle 10 includes a suction nozzle body 11. The suction nozzle body 11 has a through adsorption channel 111 formed along a first direction. The suction nozzle body 11 includes a first end and a second end along the first direction. The first end is used to assemble with the opening of the battery. The second end of the suction nozzle body 11 has a first boss 114 formed along the first direction. The first boss 114 is used to cooperate with the first clearance hole of the guide member.

[0092] The suction nozzle 10 provided in this embodiment includes a suction nozzle body 11. The suction nozzle body 11 forms a through adsorption channel 111 along a first direction, which is used to provide a flow channel for gas and overflowing electrolyte when the lithium battery formation equipment is working, so that the inside of the battery is connected to the negative pressure cup under negative pressure. The first end is used to assemble with the opening of the battery to ensure a tight connection between the suction nozzle and the opening of the battery, and to ensure the accurate positioning between the adsorption channel 111 of the suction nozzle 10 and the liquid injection port of the battery cell, preventing gas leakage and electrolyte overflow. The second end of the suction nozzle body 11 forms a first protrusion 114 along the first direction. The first protrusion 114 is used to cooperate with the first clearance hole of the guide member, thereby providing guidance for the opening of the battery during the assembly process. When the opening of the battery deviates, it cooperates with the guide member to guide the opening of the battery to be assembled smoothly, ensuring the accuracy and efficiency of assembly, reducing assembly time and error rate, and improving production efficiency.

[0093] The first direction is the direction indicated by arrow X in Figure 7, which is also the adsorption direction of the nozzle 10.

[0094] Specifically, as shown in Figure 11, the outer peripheral surface of the nozzle body 11 is a first cylindrical surface 112.

[0095] The outer circumferential surface of the nozzle body 11 is designed as a cylinder to ensure that it has a central axis aligned radially with the guide. This guarantees concentricity between the battery opening and the nozzle body 11 when the battery opening is assembled according to the guidance provided by the nozzle 10 and the guide. This ensures assembly accuracy and avoids problems such as loose connections and poor sealing caused by eccentricity. After the battery opening is connected to the nozzle 10, the coaxial cylindrical design ensures that the assembly space is evenly distributed circumferentially. This ensures that the battery opening experiences uniform force in all directions, preventing deformation or damage caused by excessive localized force. During lithium battery formation, uniform force helps maintain connection stability and prevents loosening or leakage due to external forces.

[0096] In this embodiment, as shown in Figures 7 to 9, a first elastic boss 113 is formed at the first end of the nozzle body 11 along the first direction, and the outer peripheral wall of the first elastic boss 113 is used to cooperate with the reduced diameter portion of the opening of the battery.

[0097] The first elastic protrusion 113 can fit tightly against the narrowed portion of the battery opening. Due to its elasticity, it can generate a certain pressure on the contact surface, forming a good seal. During the formation process, the relative position between the nozzle 10 and the battery opening may change slightly due to factors such as temperature changes and vibration. The first elastic protrusion 113 can adapt to these changes through its own elastic deformation, always maintaining a good seal. When the first elastic protrusion 113 engages with the narrowed portion of the battery opening, the elastic protrusion generates a certain frictional force and clamping force, making the connection between the nozzle and the battery opening more secure. This effectively prevents the nozzle from accidentally loosening or falling off during operation, ensuring the smooth progress of the formation process.

[0098] Of course, in other embodiments, the first end of the nozzle body 11 can also be directly fitted with the opening of the battery to ensure a tight seal after fitting.

[0099] Optionally, as shown in FIG8, a first elastic protrusion ring 1131 is provided on the outer peripheral wall of the first elastic protrusion 113, and the first elastic protrusion ring 1131 is used to cooperate with the reduced diameter portion of the opening of the battery.

[0100] The first elastic protrusion 113 itself can already form a certain seal with the narrowed diameter of the battery opening. Adding the first elastic protrusion ring 1131 on this basis is equivalent to adding an extra layer of sealing protection, which can significantly improve the reliability of the seal and effectively prevent leakage of gas and electrolyte during the lithium battery formation process. During the lithium battery formation process, the internal pressure may change. The first elastic protrusion ring 1131 can elastically deform according to the pressure changes, better adapting to different pressure conditions.

[0101] Alternatively, a sealing ring or elastic gasket may be provided on the outer peripheral wall of the first elastic boss 113 to further achieve the sealing between the first elastic boss 113 and the opening of the battery.

[0102] Optionally, as shown in Figure 8, a second elastic protrusion ring 1132 is provided on the outer edge of the nozzle body 11. The second elastic protrusion ring 1132 is used to cooperate with the narrowed diameter portion of the opening of the battery, and a deformation space is formed between the first elastic protrusion ring 1131 and the second elastic protrusion ring 1132.

[0103] The first elastic protruding ring 1131 and the second elastic protruding ring 1132 work together to cooperate with the narrowed diameter of the battery opening, forming a deformation space. This greatly improves the reliability of the seal and effectively prevents leakage of gas and electrolyte during the lithium battery formation process, ensuring a stable formation environment. Protruding rings at different positions can contact the battery opening from different angles and locations, adapting to any slight irregularities in the battery opening and enhancing sealing performance. The second elastic protruding ring 1132 increases the contact area and clamping force with the battery opening, and together with the first elastic protruding ring 1131, makes the connection between the nozzle and the battery opening more secure. Even under vibration or external impact, it effectively prevents the nozzle from loosening or falling off, ensuring the smooth progress of the formation process.

[0104] In one possible implementation, as shown in FIG7, an annular groove 115 is provided on the outer peripheral wall of the nozzle body 11.

[0105] The purpose of the annular groove 115 is to create a disassembly space for the nozzle 10 when the guide is assembled on the negative pressure formation equipment. This design does not occupy excessive additional space, and while ensuring ease of disassembly, it optimizes space utilization, making the structure of the nozzle 10 more compact and reasonable. The disassembly space provides sufficient operating space for disassembly tools. When it is necessary to disassemble the nozzle 10, the operator can insert the tool into the disassembly space to easily clamp or pry the nozzle body 11, achieving quick disassembly.

[0106] In other possible disassembly methods, such as disassembly from the first and second ends of the nozzle body 11, the annular groove 115 may not be provided, or a protrusion may be provided on the outer peripheral wall of the nozzle body 11 to facilitate disassembly by the operator holding the protrusion.

[0107] In another possible implementation, as shown in FIG9, the edge of the first boss 114 is provided with an elastic flange 1141, which is used to overlap with the edge of the first clearance hole of the guide.

[0108] Specifically, the guide component of the first protrusion 114 is positioned within the first clearance hole of the guide component. Therefore, the elastic flange 1141 overlaps with the edge of the first clearance hole of the guide component, and the guide component is assembled with the nozzle 10. This arrangement of the elastic flange 1141 increases the tightness and firmness of the connection, preventing loosening or separation between the nozzle body 11 and the guide component. The elasticity of the elastic flange 1141 allows it to automatically deform during insertion, smoothly entering the first clearance hole and overlapping with its edge, making installation and disassembly simpler and faster, thus improving production efficiency. This connection structure design is compact and does not occupy excessive space.

[0109] Optionally, as shown in Figure 9, the outer peripheral wall of the first boss 114 is provided with a third elastic protrusion ring 1142.

[0110] The third elastic protruding ring 1142 can generate additional friction and clamping force when the first boss 114 contacts the inner wall of the first clearance hole, and can also withstand some deformation. When the negative pressure cup rod is inserted into the nozzle body 11, the elastic characteristics of the third elastic protruding ring 1142 can adapt to this dimensional change, and ensure the tightness of the connection through its own deformation. At the same time, the third elastic protruding ring 1142 can enhance the sealing performance and effectively prevent gas and liquid leakage.

[0111] Specifically, as shown in Figure 9, the number of third elastic protrusions 1142 is set to multiple, and the multiple third elastic protrusions 1142 are axially distributed along the outer peripheral surface of the first boss 114.

[0112] Multiple third elastic protrusions 1142 provide multiple clamping forces at different positions, making the connection between the nozzle body 11 and the connecting part more secure when the first protrusion 114 is inserted into the first clearance hole. During the connection process, a certain amount of stress will be generated due to the interference fit and the action of the elastic protrusions. The distribution of multiple third elastic protrusions 1142 can disperse the stress to different positions, reduce local stress concentration, and extend the service life of the connecting parts.

[0113] For example, there are two third elastic protrusions 1142. Of course, in other embodiments, there may be one, three or more third elastic protrusions 1142, which is not limited here.

[0114] In one possible implementation, as shown in Figures 9 and 10, the nozzle body 11 is provided with a magnetic element 116.

[0115] Disassembly using magnetic force eliminates the need for complex tools or cumbersome procedures. Operators can easily detach the nozzle from the equipment using magnets or other magnetic tools, significantly improving disassembly speed and efficiency, and saving time and labor costs. Especially in situations requiring frequent nozzle replacement or equipment maintenance, magnetic disassembly can greatly improve work efficiency. Simultaneously, magnetic disassembly avoids direct contact with the nozzle 10, reducing the risk of contamination and damage. Compared to traditional disassembly methods, magnetic disassembly reduces the risk of operator injury and equipment damage. The magnetic component 116 does not negatively impact the nozzle's structure and performance; it can be cleverly integrated into the nozzle body 11, occupying no extra space and not affecting the nozzle's normal operation. Exemplarily, the magnetic component 116 can be a metal component or a plastic component containing magnetic materials, etc., and is not limited thereto.

[0116] Specifically, as shown in Figure 10, the magnetic component 116 has a conical structure. The larger diameter end of the conical structure is close to the first end of the nozzle body 11, and the middle of the conical structure is provided with a second clearance hole 1161 corresponding to the adsorption channel 111. Since the larger diameter end of the conical structure is close to the first end of the nozzle body 11, when the magnetic component 116 is subjected to force, the force acts towards the edge of the first end of the nozzle body 11, so that the force is directed towards the contact point between the nozzle body 11 and the opening of the battery, further improving the sealing effect.

[0117] Alternatively, in other embodiments, the magnetic element 116 may be a plurality of magnetic particles or magnetic sheets distributed in the nozzle body 11.

[0118] In this embodiment, as shown in FIG10, a third clearance hole 1162 is provided on the conical structure, and the third clearance hole 1162 is used to avoid the injection molding liquid.

[0119] In the manufacturing process of the nozzle body 11, injection molding is typically used. The third clearance hole 1162 allows the injection molten metal to flow more smoothly in the mold, preventing the magnetic component 116 from interfering with the injection molding process. This ensures that the nozzle body 11 can be completely molded, improving production efficiency and product quality.

[0120] In this embodiment, as shown in FIG11, a conical adsorption surface 117 is formed at the first end of the nozzle body 11, and the adsorption channel 111 passes through the small diameter end of the conical adsorption surface 117.

[0121] Compared to a planar adsorption surface, the conical adsorption surface 117 has a larger surface area, providing a larger adsorption area when in contact with the electrolyte injection port of the battery cell, thereby enhancing the adsorption capacity for gases and potentially overflowing electrolyte. During lithium battery formation, it can more effectively maintain a negative pressure environment, ensuring formation efficiency. The larger adsorption area also improves adsorption stability and reduces the risk of leakage due to uneven local adsorption. The shape of the conical adsorption surface 117 guides the flow of gas and electrolyte towards the adsorption channel 111. Since the smaller diameter end is located at the center of the conical adsorption surface 117, the gas and electrolyte are more easily concentrated and flow towards the adsorption channel 111 under the guidance of the conical surface, improving adsorption efficiency. This guiding effect makes the adsorption process smoother, reduces flow resistance, and ensures the normal operation of the negative pressure system. Simultaneously, when the conical adsorption surface 117 contacts the electrolyte injection port of the battery cell, it forms a gradually narrowing sealing area, which increases the contact pressure, improves the sealing performance, and prevents gas leakage and electrolyte overflow. Compared with the planar adsorption surface, the conical surface has a better sealing effect and can better adapt to pressure changes and vibrations during the formation process. The structure of the conical adsorption surface 117 can, to a certain extent, enhance the structural strength of the nozzle body 11. The conical shape has good mechanical properties and can withstand certain external forces without easily deforming or being damaged.

[0122] Of course, in other embodiments, for ease of manufacture and simple structure, the first end of the nozzle body 11 can also be set as a horizontal adsorption surface.

[0123] Optionally, as shown in FIG11, a plurality of reinforcing support protrusions 1171 are provided on the conical adsorption surface 117 surrounding the adsorption channel 111. Exemplarily, the reinforcing support protrusions 1171 can be configured as a wedge-shaped structure as shown in FIG11, or as a ring-shaped structure, and are not limited thereto.

[0124] The conical adsorption surface 117 is prone to deformation or damage when aligned with the battery cell's filling port and subjected to various external forces. Multiple reinforcing support protrusions 1171 are provided around the adsorption channel 111 on the conical adsorption surface 117. These protrusions increase the strength of the conical adsorption surface 117 at critical locations, improving its resistance to external forces. These reinforcing support protrusions 1171 can disperse localized stress, preventing excessive deformation of the conical adsorption surface 117 under pressure, thereby extending the nozzle's service life. When the nozzle connects to the battery opening and forms a negative pressure, the conical adsorption surface 117 may be subjected to inward pressure and collapse. The reinforcing support protrusions 1171 provide additional support to prevent the adsorption surface from collapsing, ensuring the unobstructed flow of the adsorption channel 111 and the normal operation of the negative pressure system.

[0125] This application also discloses a lithium battery formation device, as shown in Figures 1 and 3, including a mounting frame 50, a negative pressure cup 60, and a negative pressure nozzle assembly. The negative pressure cup 60 is mounted on the mounting frame 50, and the negative pressure nozzle assembly is connected to the negative pressure cup 60. The negative pressure nozzle assembly in this lithium battery formation device is the aforementioned negative pressure nozzle assembly. Therefore, the lithium battery formation device in this embodiment has roughly the same technical effect as the aforementioned negative pressure nozzle assembly. Since the technical effect of the negative pressure nozzle assembly has been fully explained, it will not be repeated here.

[0126] Alternatively, the lithium battery formation equipment in this embodiment includes a mounting frame, a negative pressure cup, and a suction nozzle 10. The negative pressure cup is mounted on the mounting frame, and the suction nozzle 10 is connected to the negative pressure cup. The suction nozzle 10 in this lithium battery formation equipment is the suction nozzle 10 described above. Therefore, the lithium battery formation equipment in this embodiment has roughly the same technical effect as the suction nozzle 10 described above. Since the technical effect of the suction nozzle 10 has been fully explained, it will not be repeated here.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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. Such 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.

Claims

1. A negative pressure suction nozzle assembly, configured to be disposed on an opening in a lithium battery formation device for connecting a negative pressure cup and a battery, the negative pressure suction nozzle assembly comprising: The suction nozzle includes a suction nozzle body, which has a through suction channel formed along a first direction. The suction nozzle body includes a first end and a second end along the first direction, and the first end is configured to be assembled with the opening of the battery. A guide member, comprising a guide body and a guide portion, wherein the guide body is disposed on the outer periphery of the nozzle body, and there is an assembly gap between the guide body and the outer periphery of the nozzle body, and the guide portion is disposed at a first end of the guide body, wherein the first end of the guide body protrudes beyond the first end of the nozzle body in a first direction, and the guide portion is configured to provide guidance for the opening of the battery to be assembled into the assembly gap.

2. The negative pressure suction nozzle assembly according to claim 1, wherein, The guide portion is a guide slope, which is disposed on the side of the first end of the guide body facing the nozzle body. The lower edge of the guide slope is radially away from the nozzle body compared to the upper edge of the guide slope.

3. The negative pressure suction nozzle assembly according to claim 1, wherein, The first end of the nozzle body has a first elastic protrusion formed along the first direction. The outer peripheral wall of the first elastic protrusion is configured to cooperate with the reduced diameter portion of the opening of the battery. The outer peripheral wall of the first elastic protrusion is provided with a first elastic ring, which is configured to cooperate with the reduced diameter portion of the opening of the battery.

4. The negative pressure suction nozzle assembly according to claim 1, wherein, The guide also includes a connecting part, which is disposed at the second end of the guide body and is configured to be connected to a lithium battery formation device. A first protrusion is formed at the second end of the nozzle body along the first direction. A first clearance hole is formed on the connecting part along the first direction. The first protrusion is disposed in the first clearance hole and has a clearance gap with the first clearance hole.

5. The negative pressure suction nozzle assembly according to claim 1, wherein, The guide body includes multiple clearance notches, which are spaced apart around the outer periphery of the nozzle body. The outer peripheral wall of the nozzle body is provided with an annular groove, and a disassembly space is formed between the annular groove and the multiple clearance notches.

6. The negative pressure suction nozzle assembly according to claim 1, wherein, The guide further includes a connecting portion, which is disposed at the second end of the guide body and is configured to connect with the suction nozzle. A first clearance hole is formed on the connecting portion along the first direction. A first boss is formed at the second end of the suction nozzle body along the first direction, and the first boss is disposed in the first clearance hole.

7. The negative pressure suction nozzle assembly according to claim 6, wherein, The first boss has an elastic flange on its edge, which overlaps with the edge of the first clearance hole. The edge of the first clearance hole has a recessed groove, and the elastic flange overlaps in the recessed groove. The outer peripheral wall of the first boss is interference-fitted with the inner wall of the first clearance hole. The outer peripheral wall of the first boss has a third elastic ring.

8. The negative pressure suction nozzle assembly according to claim 7, wherein, The connecting part is provided with an anti-rotation part, which is used to engage with the lithium battery formation equipment to prevent the guide from rotating relative to the nozzle. The anti-rotation part includes a positioning pin, which extends along the first direction toward a direction away from the nozzle.

9. The negative pressure suction nozzle assembly according to claim 1, wherein, The nozzle body is equipped with a magnetic component.

10. The negative pressure suction nozzle assembly according to claim 9, wherein, The magnetic component has a conical structure. The large-diameter end of the conical structure is closer to the first end of the suction nozzle body than the middle part of the conical structure. The middle part of the conical structure is provided with a second clearance hole corresponding to the adsorption channel.

11. The negative pressure suction nozzle assembly according to claim 1, wherein, The first end of the nozzle body has a conical adsorption surface, the adsorption channel passes through the small diameter end of the conical adsorption surface, and multiple reinforcing support protrusions are provided on the conical adsorption surface around the adsorption channel.

12. A suction nozzle configured to be disposed on a lithium battery formation device to connect a negative pressure cup and an opening of a battery, and to cooperate with a guide member, the suction nozzle comprising a suction nozzle body having a through adsorption channel formed along a first direction, the suction nozzle body comprising a first end and a second end along the first direction, the first end being configured to assemble with the opening of the battery, the second end of the suction nozzle body having a first protrusion formed along the first direction, the first protrusion being configured to cooperate with a first clearance hole of the guide member.

13. The suction nozzle according to claim 12, wherein, The outer peripheral surface of the suction nozzle body is a first cylindrical surface.

14. The suction nozzle according to claim 12, wherein, The outer peripheral wall of the suction nozzle body is provided with an annular groove.

15. The suction nozzle according to claim 12, wherein, The first boss has an elastic flange along its edge, which is configured to overlap with the edge of the first clearance hole of the guide member, and the outer peripheral wall of the first boss has a third elastic ring.

16. A lithium battery formation apparatus, comprising a mounting frame, a negative pressure cup, and a negative pressure nozzle assembly, wherein the negative pressure cup is mounted on the mounting frame, and the negative pressure nozzle assembly is connected to the negative pressure cup, wherein the negative pressure nozzle assembly is the negative pressure nozzle assembly according to any one of claims 1 to 11; or, It includes a mounting bracket, a negative pressure cup, and a suction nozzle, wherein the negative pressure cup is mounted on the mounting bracket, and the suction nozzle is connected to the negative pressure cup, and the suction nozzle is the suction nozzle according to any one of claims 12 to 15.

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