Negative pressure suction nozzle and lithium battery formation equipment

Abstract

The utility model discloses a negative pressure suction nozzle and lithium battery formation equipment, the negative pressure suction nozzle comprises a suction nozzle body, a through adsorption channel and a flow channel used for providing gas and overflowing electrolyte are formed in the suction nozzle body along a first direction, the suction nozzle body comprises a first end and a second end along the first direction, the first end is used for being assembled with the opening of the battery, tight connection between the suction nozzle and the opening of the battery is ensured, gas leakage is prevented, a first boss is formed at the second end of the suction nozzle body in the first direction, and the first boss is used for being matched with the first receding hole of the guide part. And when the opening of the battery deviates, the guide piece is matched with the guide piece to guide the opening of the battery to be smoothly assembled, so that the accuracy and the high efficiency of assembly are ensured, the assembly time is shortened, the error rate is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of semiconductor technology, and in particular to a negative pressure suction nozzle and lithium battery formation equipment. Background Technology

[0002] 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. Utility Model Content

[0003] This application discloses a negative pressure 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 cooperates with the guide to guide the opening of the battery to be assembled smoothly, ensuring the accuracy and efficiency of the assembly, reducing the assembly time and error rate, and improving production efficiency.

[0004] To achieve the above objectives, this application discloses a negative pressure suction nozzle for use in a lithium battery formation device to connect a negative pressure cup and a battery opening, and to cooperate with a guide member. The nozzle body includes a suction nozzle body with a through adsorption channel formed along a first direction. The suction 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. The second end of the suction nozzle body has a first protrusion formed along the first direction, and the first protrusion is used to cooperate with the clearance hole of the guide member.

[0005] In one possible implementation, the outer peripheral surface of the nozzle body is a first cylindrical surface.

[0006] In one possible implementation, a first elastic boss is formed at the first end of the nozzle body along the first direction, and the outer peripheral wall of the first elastic boss is used to cooperate with the reduced diameter portion of the opening of the battery.

[0007] In one possible implementation, a first elastic protrusion is provided on the outer peripheral wall of the first elastic boss, the first elastic protrusion being used to engage with the reduced diameter portion of the opening of the battery.

[0008] In one possible implementation, a second elastic protrusion is provided on the outer edge of the nozzle body. The second elastic protrusion is used to cooperate with the reduced diameter portion of the opening of the battery, and a deformation space is formed between the first elastic protrusion and the second elastic protrusion.

[0009] In one possible implementation, an annular groove is provided on the outer peripheral wall of the suction nozzle body.

[0010] In one possible implementation, the edge of the first boss is provided with an elastic flange for overlapping with the edge of the first clearance hole of the guide.

[0011] In one possible implementation, the outer peripheral wall of the first boss is provided with a third elastic protruding ring.

[0012] In one possible implementation, the third elastic protrusion ring comprises a plurality of third elastic protrusion rings, which are axially distributed along the outer peripheral surface of the first boss.

[0013] In one possible implementation, the nozzle body is provided with a magnetic element.

[0014] In one possible implementation, the magnetic component is a conical structure, with the large-diameter end of the conical structure close to the first end of the suction nozzle body, and a second clearance hole corresponding to the adsorption channel is provided in the middle of the conical structure.

[0015] In one possible implementation, the tapered structure is provided with a third clearance hole for avoiding the injection molding liquid.

[0016] In one possible implementation, a tapered adsorption surface is formed at the first end of the nozzle body, and the adsorption channel extends through the small-diameter end of the tapered adsorption surface.

[0017] In one possible implementation, the conical adsorption surface is provided with a plurality of reinforcing support protrusions surrounding the adsorption channel.

[0018] This application also discloses a lithium battery formation device, including a mounting frame, a negative pressure cup, and a negative pressure nozzle. The negative pressure cup is mounted on the mounting frame, and the negative pressure nozzle is connected to the negative pressure cup. The negative pressure nozzle includes any of the negative pressure nozzles described above.

[0019] Compared with the prior art, the beneficial effects of this application are as follows:

[0020] In the negative pressure suction nozzle and lithium battery formation equipment provided in this application, the suction nozzle includes a nozzle body. The 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 to assemble with the opening of the battery, ensuring a tight connection between the nozzle and the opening of the battery, preventing gas leakage and electrolyte overflow. The second end of the nozzle body has a first protrusion formed along the first direction. The first protrusion is used to cooperate with the first clearance hole of the guide, 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 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. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is one of the structural schematic diagrams of a negative pressure suction nozzle provided in an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 A magnified view of a portion at point C;

[0024] Figure 3 This is a second schematic diagram of the structure of a negative pressure suction nozzle provided in an embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of the structure of a magnetic component of a negative pressure suction nozzle provided in an embodiment of this utility model;

[0026] Figure 5 This is the third schematic diagram of a negative pressure suction nozzle provided in an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Negative pressure nozzle; 11-Nozzle 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. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (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, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0032] 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.

[0033] In view of this, some embodiments of this application provide a negative pressure 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 cooperates with the guide to guide the opening of the battery to be assembled smoothly, ensuring the accuracy and efficiency of the assembly, reducing the assembly time and error rate, and improving production efficiency.

[0034] The present application will be described in detail below through specific embodiments:

[0035] The negative pressure suction nozzle 10 of this application embodiment is used in a lithium battery formation device to connect the negative pressure cup and the battery opening, and cooperates with the guide member, such as... Figure 1-5As shown, the negative pressure 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.

[0036] The negative pressure suction nozzle 10 provided in this application 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 negative pressure 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.

[0037] The first direction is Figure 1 The direction indicated by the middle arrow X is also the suction direction of the negative pressure nozzle 10.

[0038] Specifically, such as Figure 5 As shown, the outer peripheral surface of the nozzle body 11 is the first cylindrical surface 112.

[0039] 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 ensures concentricity between the battery opening and the nozzle body 11 when the battery opening is assembled according to the guidance provided by the negative pressure nozzle 10 and the guide. This guarantees assembly accuracy and avoids problems such as loose connections and poor sealing caused by eccentricity. After the battery opening is connected to the negative pressure 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.

[0040] In this embodiment, as Figure 1-3 As shown, a first elastic protrusion 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 protrusion 113 is used to cooperate with the reduced diameter portion of the opening of the battery.

[0041] 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 negative pressure nozzle 10 and the battery opening may change slightly due to factors such as temperature changes and vibrations. 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.

[0042] 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.

[0043] Furthermore, such as Figure 2 As shown, a first elastic protrusion 1131 is provided on the outer peripheral wall of the first elastic protrusion 113, and the first elastic protrusion 1131 is used to cooperate with the reduced diameter part of the opening of the battery.

[0044] 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.

[0045] 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.

[0046] Furthermore, such as Figure 2 As shown, 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 part of the opening of the battery. A deformation space is formed between the first elastic protrusion ring 1131 and the second elastic protrusion ring 1132.

[0047] 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's shape and further 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.

[0048] In one possible implementation, such as Figure 1 As shown, an annular groove 115 is provided on the outer peripheral wall of the nozzle body 11.

[0049] The purpose of the annular groove 115 is to create a disassembly space for the negative pressure nozzle 10 when the guide component 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 negative pressure nozzle 10 more compact and reasonable. The disassembly space provides sufficient operating space for disassembly tools. When it is necessary to disassemble the negative pressure nozzle 10, the operator can insert the tool into the disassembly space to easily clamp or pry the nozzle body 11, achieving quick disassembly.

[0050] 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.

[0051] In another possible implementation, such as Figure 3 As shown, 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.

[0052] 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 negative pressure suction nozzle 10. This arrangement of the elastic flange 1141 increases the tightness and firmness of the connection, preventing loosening or separation between the suction 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.

[0053] Furthermore, such as Figure 3 As shown, the outer peripheral wall of the first boss 114 is provided with a third elastic protrusion ring 1142.

[0054] 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 further enhance the sealing performance and effectively prevent gas and liquid leakage.

[0055] Specifically, such as Figure 3 As shown, the third elastic protrusion ring 1142 includes multiple third elastic protrusion rings 1142, which are axially distributed along the outer peripheral surface of the first boss 114.

[0056] 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.

[0057] 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.

[0058] In one possible implementation, such as Figure 3 and Figure 4 As shown, the nozzle body 11 is provided with a magnetic component 116.

[0059] 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 negative pressure 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. For example, the magnetic component 116 can be a metal component or a plastic component containing magnetic materials, etc., and is not limited thereto.

[0060] Specifically, such as Figure 4 As shown, 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.

[0061] Alternatively, in other embodiments, the magnetic element 116 may be a plurality of magnetic particles or magnetic sheets distributed in the nozzle body 11.

[0062] In this embodiment, as Figure 4 As shown, the conical structure is provided with a third clearance hole 1162, which is used to avoid the injection molding liquid.

[0063] 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.

[0064] In this embodiment, as Figure 5 As shown, 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.

[0065] 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.

[0066] 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.

[0067] Furthermore, such as Figure 5 As shown, 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 follows: Figure 5 The wedge-shaped structure shown can also be set as a ring structure, and there is no limitation here.

[0068] 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.

[0069] This application also discloses a lithium battery formation device, including a mounting frame, a negative pressure cup, and a negative pressure nozzle 10. The negative pressure cup is mounted on the mounting frame, and the negative pressure nozzle 10 is connected to the negative pressure cup. The negative pressure nozzle 10 in this lithium battery formation device is the negative pressure nozzle 10 described above. Therefore, the lithium battery formation device in this embodiment has roughly the same technical effect as the negative pressure nozzle 10 described above. Since the technical effect of the negative pressure nozzle 10 has been fully explained, it will not be repeated here.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 utility model.

Claims

1. A negative pressure suction nozzle, used in a lithium battery formation equipment for connecting a negative pressure cup and an opening of a battery, and cooperating with a guide member, characterized in that, The device 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. 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.

2. The negative pressure suction nozzle according to claim 1, characterized in that, The outer peripheral surface of the suction nozzle body (11) is a first cylindrical surface (112).

3. The negative pressure suction nozzle according to claim 1, characterized in that, The first end of the nozzle body (11) is formed with a first elastic boss (113) 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.

4. The negative pressure suction nozzle according to claim 3, characterized in that, The outer peripheral wall of the first elastic boss (113) is provided with a first elastic protrusion ring (1131), which is used to cooperate with the reduced diameter portion of the opening of the battery.

5. The negative pressure suction nozzle according to claim 1, characterized in that, The outer peripheral wall of the suction nozzle body (11) is provided with an annular groove (115).

6. The negative pressure suction nozzle according to claim 1, characterized in that, The first boss (114) has an elastic flange (1141) on its edge, which is used to overlap with the edge of the first clearance hole of the guide member. The outer peripheral wall of the first boss (114) is provided with a third elastic ring (1142).

7. The negative pressure suction nozzle according to claim 1, characterized in that, The nozzle body (11) is provided with a magnetic component (116).

8. The negative pressure suction nozzle according to claim 7, characterized in that, The magnetic component (116) has a conical structure. The large-diameter end of the conical structure is close to the first end of the suction nozzle body (11). The middle part of the conical structure is provided with a second clearance hole (1161) corresponding to the adsorption channel (111).

9. The negative pressure suction nozzle according to claim 1, characterized in that, The first end of the suction nozzle body (11) is formed with a conical adsorption surface (117), and the adsorption channel (111) passes through the small diameter end of the conical adsorption surface (117).

10. The negative pressure suction nozzle according to claim 9, characterized in that, The conical adsorption surface (117) is provided with a plurality of reinforcing support protrusions (1171) surrounding the adsorption channel (111).

11. A lithium battery formation apparatus, characterized in that, It includes a mounting bracket, a negative pressure cup, and a negative pressure nozzle (10). The negative pressure cup is mounted on the mounting bracket, and the negative pressure nozzle (10) is connected to the negative pressure cup. The negative pressure nozzle (10) is the negative pressure nozzle (10) according to any one of claims 1-10.

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