Negative pressure suction nozzle assembly and lithium battery formation equipment

Abstract

The utility model discloses a negative pressure suction nozzle assembly and lithium battery formation equipment, the negative pressure suction nozzle assembly comprises a suction nozzle, the suction nozzle comprises a suction nozzle body, a through adsorption channel is 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 an opening of the battery; the guide part comprises a guide body and a guide part, the guide body is arranged on the periphery of the suction nozzle body, an assembly gap is formed between the guide body and the periphery of the suction nozzle body, the guide part is arranged at the first end of the guide body, and the guide part is arranged at the second end of the guide body. The first end of the guide body protrudes out of the first end of the suction nozzle body in the first direction, and the guide part is used for guiding the opening of the battery to be assembled to the assembly gap, so that the opening of the battery can be quickly and accurately aligned with the suction nozzle for assembly, the assembly time is shortened, the error rate is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor technology, and in particular to a negative pressure nozzle assembly and a lithium battery formation equipment. BACKGROUND

[0002] In the lithium battery back-end production line formation process, some gas will be generated, so a negative pressure cup and a nozzle are used to suck and collect the gas in the formation process. The nozzle is tightly connected with the opening of the open battery, plays a sealing role, avoids the contact between the inside of the battery and the external atmosphere, and thus ensures that the negative pressure environment in the battery is not disturbed by the external air during the formation process, and ensures the stability and consistency of the formation process. However, when the open battery is pressed tightly by a pneumatic cylinder during work, the nozzle may not be accurately positioned with the opening of the open battery, which causes the suction channel of the nozzle to deviate from the liquid injection port of the battery cell, and thus the normal negative pressure suction action cannot be completed. CONTENT OF THE UTILITY MODEL

[0003] The present application discloses a negative pressure nozzle assembly and a lithium battery formation equipment, which can provide guidance for the opening of the battery during assembly, guide the opening of the battery to smoothly enter the assembly gap when the opening of the battery deviates, and ensure the accuracy and efficiency of assembly. The provision of the guide part provides clear guidance for the assembly of the opening of the battery to the assembly gap, the opening of the battery can be quickly and accurately aligned with the nozzle for assembly, the suction channel of the nozzle is aligned with the liquid injection port of the battery cell to complete the negative pressure suction action, the assembly time and error rate are reduced, and the production efficiency is improved.

[0004] In order to achieve the above-mentioned purpose, the present application discloses a negative pressure nozzle assembly for connecting a negative pressure cup and an opening of a battery on a lithium battery formation equipment, comprising:

[0005] a nozzle, the nozzle comprising a nozzle body, the nozzle body being formed with a through suction channel in a first direction, the nozzle body comprising a first end and a second end in the first direction, the first end being used for assembly with the opening of the battery;

[0006] a guide piece, the guide piece comprising a guide body and a guide part, the guide body being arranged on the outer periphery of the nozzle body, the guide body and the outer periphery of the nozzle body having an assembly gap therebetween, the guide part being arranged on the first end of the guide body, the first end of the guide body protruding from the first end of the nozzle body in the first direction, the guide part being used for providing guidance for the assembly of the opening of the battery to the assembly gap.

[0007] In a possible implementation manner, the guide part is a guide slope, the guide slope being arranged on the side of the first end of the guide body facing the nozzle body, the lower edge of the guide slope being radially away from the nozzle body compared with the upper edge of the guide slope.

[0008] In a possible implementation, the outer circumferential surface of the nozzle body is a first cylindrical surface, and an inner surface of the guide body for forming the assembly gap is a second cylindrical surface, and the first cylindrical surface and the second cylindrical surface are coaxially arranged.

[0009] In a possible implementation, the guide inclined surface is a frustum, and a smaller-diameter end of the frustum is connected with the second cylindrical surface.

[0010] In a possible implementation, a first elastic boss is formed on the first end of the nozzle body in the first direction, and an outer circumferential wall of the first elastic boss is used to cooperate with the reduced-diameter part of the opening of the battery.

[0011] In a possible implementation, a first elastic convex ring is arranged on the outer circumferential wall of the first elastic boss, and the first elastic convex ring is used to cooperate with the reduced-diameter part of the opening of the battery.

[0012] In a possible implementation, a second elastic convex ring is arranged on the outer edge of the nozzle body, the second elastic convex ring is used to cooperate with the reduced-diameter part of the opening of the battery, and a deformation space is formed between the first elastic convex ring and the second elastic convex ring.

[0013] In a possible implementation, the guide further includes a connecting part, the connecting part is arranged at the second end of the guide body, and the connecting part is used to be connected with the lithium battery formation equipment.

[0014] In a possible implementation, a first boss is formed on the second end of the nozzle body in the first direction, a first avoiding hole is formed on the connecting part in the first direction, the first boss is arranged in the first avoiding hole and has an avoiding gap with the first avoiding hole.

[0015] In a possible implementation, the guide body includes a plurality of avoiding notches, the plurality of avoiding notches are arranged at intervals around the outer circumferential surface of the nozzle body, an annular groove is arranged on the outer circumferential wall of the nozzle body, and a dismounting space is formed between the annular groove and the plurality of avoiding notches.

[0016] In a possible implementation, the guide further includes a connecting part, the connecting part is arranged at the second end of the guide body, and the connecting part is used to be connected with the nozzle.

[0017] In a possible implementation, a first avoiding hole is formed on the connecting part in the first direction, a first boss is formed on the second end of the nozzle body in the first direction, the first boss is arranged in the first avoiding hole, an elastic flange is arranged on the edge of the first boss, and the elastic flange overlaps with the hole of the first avoiding hole.

[0018] In a possible implementation, the hole of the first avoiding hole is provided with a groove, and the elastic flange is overlapped in the groove.

[0019] In a possible implementation, the outer peripheral wall of the first boss is in interference fit with the inner wall of the first avoiding hole.

[0020] In a possible implementation, the outer peripheral wall of the first boss is provided with a third elastic flange.

[0021] In a possible implementation, the third elastic flange includes a plurality of third elastic flanges, and the plurality of third elastic flanges are distributed along the outer peripheral surface of the first boss in the first direction.

[0022] In a possible implementation, the connecting portion is provided with a rotation stopping portion, and the rotation stopping portion is used for clamping the lithium battery formation equipment, so as to prevent the guide from rotating relative to the suction nozzle.

[0023] In a possible implementation, the rotation stopping portion includes a positioning pin, and the positioning pin extends in the first direction away from the suction nozzle.

[0024] In a possible implementation, the suction nozzle body is provided with a magnetic member.

[0025] In a possible implementation, the magnetic member is a conical structure, a large-diameter end of the conical structure is close to the first end of the suction nozzle body, and a middle part of the conical structure is provided with a second avoiding hole corresponding to the adsorption channel.

[0026] In a possible implementation, the conical structure is provided with a third avoiding hole, and the third avoiding hole is used for avoiding injection liquid.

[0027] In a possible implementation, the first end of the suction nozzle body is formed with a conical adsorption surface, and the adsorption channel penetrates a small-diameter end of the conical adsorption surface.

[0028] In a possible implementation, a plurality of reinforcing support protrusions are arranged around the adsorption channel on the conical adsorption surface.

[0029] The application further discloses a lithium battery formation equipment, including a mounting frame, a negative pressure cup and a negative pressure suction nozzle assembly, the negative pressure cup is assembled on the mounting frame, the negative pressure suction nozzle assembly is connected with the negative pressure cup, and the negative pressure suction nozzle assembly includes the negative pressure suction nozzle assembly in any one of the above.

[0030] Compared with the prior art, the application has the following beneficial effects:

[0031] In the negative pressure nozzle assembly and the lithium battery formation equipment provided in the application, the nozzle comprises a nozzle body, the nozzle body forms a through suction channel in a first direction, and is used for providing a flow channel of gas and overflowed electrolyte when the lithium battery formation equipment works, so that the inside of the battery cell is communicated with the negative pressure cup under the action of negative pressure. The first end is used for assembling with the opening of the battery, so as to ensure the close connection between the nozzle and the opening of the battery, prevent gas leakage and electrolyte overflow. The guide piece comprises a guide body, is arranged on the outer periphery of the nozzle body, has an assembly gap between the nozzle body, can provide a certain assembly space for the opening of the battery, and enables the opening of the battery to be inserted and connected with the nozzle. The guide part is located at the first end of the guide body and protrudes from the first end of the nozzle body in the first direction, provides a guide for the opening of the battery during assembly, guides the opening of the battery to smoothly enter the assembly gap when the opening of the battery deviates, and ensures the accuracy and efficiency of assembly. The arrangement of the guide part provides a clear guide for the assembly of the opening of the battery to the assembly gap, enables the opening of the battery to be quickly and accurately assembled with the nozzle, enables the suction channel of the nozzle to be aligned with the liquid injection port of the battery cell to complete the negative pressure extraction action, reduces the assembly time and error rate, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0033] Figure 1 A structure diagram of a negative pressure nozzle assembly provided by the present application embodiment is shown in the figure.

[0034] Figure 2 A partial enlarged view of A in the figure. Figure 1

[0035] Figure 3 A structure diagram of a negative pressure nozzle assembly provided by the present application embodiment is shown in the figure.

[0036] Figure 4 A partial enlarged view of B in the figure. Figure 3

[0037] A structure diagram of a guide piece of a negative pressure nozzle assembly provided by the present application embodiment is shown in the figure. Figure 5

[0038] A structure diagram of a guide piece of a negative pressure nozzle assembly provided by the present application embodiment is shown in the figure. Figure 6

[0039] A structure diagram of a guide piece of a negative pressure nozzle assembly provided by the present application embodiment is shown in the figure.​Figure 7 Figure 1 is a structural schematic view of a suction nozzle of a negative pressure suction nozzle assembly according to an embodiment of the present application;

[0040] Figure 8 Figure 2 is a partial enlarged view of C of figure 1; Figure 7

[0041] Figure 9 Figure 3 is another structural schematic view of a suction nozzle of a negative pressure suction nozzle assembly according to an embodiment of the present application;

[0042] Figure 10 Figure 4 is a structural schematic view of a magnetic part of a negative pressure suction nozzle assembly according to an embodiment of the present application;

[0043] Figure 11 Figure 5 is a third structural schematic view of a suction nozzle of a negative pressure suction nozzle assembly according to an embodiment of the present application.

[0044] Explanation of reference signs:

[0045] 10 - suction nozzle; 11 - suction nozzle body; 111 - suction channel; 112 - first cylindrical surface; 113 - first elastic boss; 1131 - first elastic boss ring; 1132 - second elastic boss ring; 114 - first boss; 1141 - elastic flange; 1142 - third elastic boss ring; 115 - annular groove; 116 - magnetic part; 1161 - second avoiding hole; 1162 - third avoiding hole; 117 - conical suction surface; 1171 - reinforcing support protrusion;

[0046] 20 - guide part; 21 - guide body; 211 - second cylindrical surface; 22 - guide portion; 221 - guide inclined surface; 2211 - conical frustum surface; 23 - connecting portion; 231 - first avoiding hole; 2311 - sink groove; 232 - rotation stopping portion;

[0047] 30 - assembly gap; 40 - avoiding gap; 50 - mounting rack; 60 - negative pressure cup; 70 - battery. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] ​In the present application, the terms "mount", "set", "provided with", "connect", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and configurations may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0051] In the lithium battery back-end production line formation process, some gases will be generated, so a negative pressure cup and a suction nozzle are used to suck and collect the gas during the formation process. The suction nozzle is tightly connected with the opening of the open battery through the suction nozzle and the opening of the open battery, which plays a sealing role, avoids the contact between the inside of the battery and the outside atmosphere, and thus ensures that the negative pressure environment inside the battery during the formation process is not disturbed by the outside air, and the stability and consistency of the formation process are ensured. However, when the open battery is pressed tightly up and down by the air cylinder during work, the suction nozzle and the opening of the open battery may not be accurately positioned, resulting in that the suction channel of the suction nozzle deviates from the liquid injection port of the battery cell, and the normal negative pressure suction action cannot be completed.

[0052] In view of this point, some embodiments of the present application provide a negative pressure suction nozzle assembly and a lithium battery formation equipment, which can provide guidance for the opening of the battery during assembly, guide the opening of the battery to smoothly enter the assembly gap when the opening of the battery deviates, ensure the accuracy and efficiency of assembly, and provide clear guidance for the assembly of the opening of the battery to the assembly gap through the setting of the guide part. The opening of the battery can be quickly and accurately aligned 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 suction action, reduce the assembly time and error rate, and improve the production efficiency.

[0053] The present application will be described in detail below through specific embodiments:

[0054] The negative pressure suction nozzle assembly of the embodiments of the present application is used to connect the negative pressure cup 60 and the opening of the battery 70 on the lithium battery formation equipment, as shown in Figures 1-8 , comprising:

[0055] The suction nozzle 10 comprises a suction nozzle body 11, the suction nozzle body 11 is formed with a through suction channel 111 in a first direction, and the suction nozzle body 11 comprises a first end and a second end in the first direction, and the first end is used for assembly with the opening of the battery 70;

[0056] The guide 20 includes a guide body 21 and a guide portion 22. The guide body 21 is arranged at the outer periphery of the nozzle body 11, and has an assembly gap 30 between the guide body 21 and the outer periphery of the nozzle body 11. The guide portion 22 is arranged at the first end of the guide body 21, and protrudes from the first end of the nozzle body 11 in the first direction. The guide portion 22 is used to guide the opening of the battery 70 to the assembly gap 30.

[0057] The negative pressure nozzle assembly provided by the embodiment of the application includes a nozzle body 11. The nozzle body 11 forms a through suction channel 111 in the first direction, and is used to provide a flow channel for gas and overflowed 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 the action of negative pressure. The first end is used to assemble with the opening of the battery 70, so as to ensure the close connection between the nozzle 10 and the opening of the battery 70, and ensure the accurate position between the suction channel 111 of the nozzle 10 and the liquid injection port of the battery, so as to prevent gas leakage and electrolyte overflow. The guide 20 includes a guide body 21 arranged at the outer periphery of the nozzle body 11, and has an assembly gap 30 between the guide body 21 and the nozzle body 11. The guide body 21 can provide a certain assembly space for the opening of the battery 70, so that the opening of the battery 70 can be inserted into and connected to the 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 the first direction. The guide portion 22 provides guidance for the opening of the battery 70 during assembly, and guides the opening of the battery 70 to smoothly enter the assembly gap 30 when the opening of the battery 70 deviates, so as to ensure the accuracy and efficiency of assembly. The guide portion 22 provides clear guidance for the opening of the battery 70 to the assembly gap 30, so that the opening of the battery 70 can be quickly and accurately aligned with the nozzle 10 for assembly. The suction channel 111 of the nozzle 10 is aligned with the liquid injection port of the battery for negative pressure suction, so as to reduce the assembly time and error rate, and improve the production efficiency.

[0058] The first direction is the direction indicated by the arrow X in the figure, and is also the suction direction of the nozzle 10. Figure 7 The first direction is the direction indicated by the arrow X in the figure, and is also the suction direction of the nozzle 10.

[0059] The guide portion 22 can have various implementation manners. In one possible implementation manner, the guide portion 22 is a guide slope 221 arranged at 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 farther away from the nozzle body 11 in the radial direction than the upper edge of the guide slope 221.

[0060] The guide slope 221 can provide a gradually converging guide path for the opening of the battery 70. When the opening of the battery 70 approaches the first end of the suction nozzle body 11, the lower edge of the guide slope 221 first contacts the opening of the battery 70. As the opening of the battery 70 continues to approach, the opening of the battery 70 naturally slides along the slope under the guidance of the slope and finally accurately enters the assembly gap 30. This gradual guiding manner makes the assembly process smoother and reduces the difficulty and time waste caused by inaccurate alignment. Due to the presence of the guide slope 221, the initial alignment accuracy requirement of the opening of the battery 70 and the suction nozzle 10 assembly is relatively reduced. Even if the opening of the battery 70 deviates from the central position of the suction nozzle body 11 within a certain range, the guide slope 221 can guide the opening of the battery 70 to the correct assembly position through its large guiding range. In actual production, assembly problems caused by equipment precision, operation errors and other factors can be reduced, and the feasibility and stability of production can be improved.

[0061] In other possible implementations, the guide portion 22 can also be a guide curve, or the guide portion is provided with a guide roller or the like to guide the opening of the battery 70.

[0062] Specifically, as shown in Figures 5-6 , 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 for forming the assembly gap 30 is a second cylindrical surface 211. The first cylindrical surface 112 and the second cylindrical surface 211 are coaxially arranged.

[0063] The coaxial arrangement makes the suction nozzle body 11 and the guide body 21 have consistent central axes 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 suction nozzle body 11 can be ensured, so that the assembly accuracy can be ensured and problems such as loose connection and poor sealing caused by eccentricity can be avoided. After the opening of the battery 70 is connected with the suction nozzle 10, the coaxial cylindrical surface design makes the assembly gap 30 between the suction nozzle body 11 and the guide body 21 uniformly distributed in the circumferential direction, so that the force received by the opening of the battery 70 in each direction is uniform, and deformation or damage caused by excessive local stress can be avoided. In the lithium battery formation process, uniform stress helps to maintain the stability of the connection and prevent loosening or leakage due to external force.

[0064] In this embodiment, the outer peripheral surface of the suction nozzle body 11 is a cylindrical surface, and correspondingly, the inner surface of the guide body 21 for forming the assembly gap 30 is an arc cylindrical surface coaxially arranged with the cylindrical surface. Of course, in other embodiments, the inner surface of the guide body 21 for forming the assembly gap 30 can also be arranged non-coaxially with the outer peripheral surface of the suction nozzle body 11, or both are arranged as prismatic surfaces, which are not limited herein.

[0065] Further, as shown in Figures 5-6 The guide slope 221 is a frustum 2211, and the smaller-diameter end of the frustum 2211 is connected to the second cylindrical surface 211.

[0066] The shape of the frustum 2211 can provide a transition area gradually shrinking from a larger diameter to a smaller diameter. When the opening of the battery 70 approaches the negative pressure suction nozzle assembly, the larger-diameter end of the frustum 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 along the frustum 2211 to the smaller-diameter end, its position is constantly adjusted and accurately guided, and finally accurately enters the assembly gap 30 with the suction nozzle body 11. This gradually shrinking guiding mode can achieve more accurate assembly guidance and improve the accuracy and efficiency of assembly.

[0067] In this embodiment, as shown in Figures 7-9 The first end of the suction nozzle body 11 is formed with a first elastic boss 113 in the first direction, and the outer peripheral wall of the first elastic boss 113 is used to cooperate with the reduced diameter part of the opening of the battery 70.

[0068] The first elastic boss 113 can tightly fit with the reduced diameter part of the opening of the battery 70. Since it has elasticity, it can generate a certain pressure on the contact surface to form a good seal. During the formation process, the relative position between the suction nozzle 10 and the opening of the battery 70 may change slightly due to factors such as temperature changes and vibrations. The first elastic boss 113 can adapt to these changes through its elastic deformation, and always maintain a good sealing state. When the first elastic boss 113 cooperates with the reduced diameter part of the opening of the battery 70, the elastic boss will generate a certain friction and clamping force, making the connection between the suction nozzle 10 and the opening of the battery 70 more secure. This can effectively prevent the suction nozzle 10 from accidentally loosening or falling off during operation, and ensure the smooth progress of the formation process.

[0069] Of course, in other embodiments, the first end of the suction nozzle body 11 can directly cooperate with the opening of the battery 70 to ensure the sealing performance after cooperation.

[0070] Further, as shown in Figure 8 The outer peripheral wall of the first elastic boss 113 is provided with a first elastic boss ring 1131, which is used to cooperate with the reduced diameter part of the opening of the battery 70.

[0071] The first elastic boss 113 itself can form a certain seal with the reduced diameter part of the opening of the battery 70, and on this basis, the first elastic convex ring 1131 is added, which is equivalent to adding a line of defense for sealing, and can significantly improve the reliability of the seal and effectively prevent the leakage of gas and electrolyte during the formation of the lithium battery. During the formation of the lithium battery, the internal pressure may change, and the first elastic convex ring 1131 can elastically deform according to the change of the pressure, and better adapt to different pressure conditions.

[0072] Alternatively, a sealing ring or elastic gasket is arranged on the outer peripheral wall of the first elastic boss 113 to further realize the sealing of the first elastic boss 113 and the opening of the battery 70.

[0073] Further, as shown in Figure 8 , the outer edge of the suction nozzle body 11 is provided with a second elastic convex ring 1132, and the second elastic convex ring 1132 is used to cooperate with the reduced diameter part of the opening of the battery 70, and a deformation space is formed between the first elastic convex ring 1131 and the second elastic convex ring 1132.

[0074] The first elastic convex ring 1131 and the second elastic convex ring 1132 cooperate with each other to form a deformation space with the reduced diameter part of the opening of the battery 70, which greatly improves the reliability of the seal and effectively prevents the leakage of gas and electrolyte during the formation of the lithium battery, and ensures the stability of the formation environment. The convex rings at different positions can contact the opening of the battery 70 from different angles and positions, adapt to the possible slight irregular shape of the opening of the battery 70, and further enhance the sealing performance. The second elastic convex ring 1132 increases the contact area and clamping force with the opening of the battery 70, and together with the first elastic convex ring 1131, the connection between the suction nozzle 10 and the opening of the battery 70 is more firm, which can effectively prevent the suction nozzle 10 from loosening or falling off even in the case of vibration, external force impact, etc., and ensure the smooth progress of the formation process.

[0075] The fixing mode of the guide 20 can have various implementation manners, and in one possible implementation manner, as shown in Figure 7 , the guide 20 further includes a connecting part 23 arranged at the second end of the guide body 21, and the connecting part 23 is used to be connected with the lithium battery formation equipment.

[0076] Thus, the connecting portion 23 connects the guide 20 to the lithium battery formation equipment, so that the guide 20 maintains a stable position during the operation, and cooperates with the suction nozzle 10 to ensure good assembly between the suction nozzle 10 and the opening of the battery 70, prevent displacement or loosening of the negative pressure suction nozzle assembly, and ensure smooth progress of the formation process. The design of the connecting portion 23 generally takes into account the quick connection and disconnection requirements with the lithium battery formation equipment. For example, screw holes are provided on the connecting portion 23, and the guide 20 can be connected to the lithium battery formation equipment by bolt connection, which can facilitate the disassembly of the guide 20 from the lithium battery formation equipment, improving the convenience and efficiency of the operation.

[0077] Specifically, as shown in Figure 2 、 Figure 5 and Figure 7 , the second end of the suction nozzle body 11 is formed with a first boss 114 in the first direction, the connecting portion 23 is formed with a first avoiding hole 231 in the first direction, the first boss 114 is arranged in the first avoiding hole 231 and has an avoiding gap 40 with the first avoiding hole 231.

[0078] The first boss 114 is arranged in the first avoiding hole 231, which can play a positioning role during installation. The installer can quickly determine the relative position of the suction nozzle body 11 and the connecting portion 23 by accurately inserting the first boss 114 into the first avoiding hole 231, thereby improving the installation efficiency and accuracy. Since the negative pressure cup 60 rod is inserted into the suction nozzle body 11 by interference fit, the avoiding gap 40 allows the suction nozzle body 11 to be fine-tuned within a certain range when the negative pressure cup 60 rod is installed in the suction nozzle body 11, to adapt to the installation conditions. At the same time, when the suction nozzle body 11 or the guide 20 needs to be maintained or replaced, the avoiding gap 40 makes the disassembly process easier.

[0079] Of course, in other embodiments, the outer peripheral wall of the second end of the suction nozzle body 11 can be arranged in the first avoiding hole 231 of the connecting portion 23 and have an avoiding gap 40 with the first avoiding hole 231.

[0080] In this embodiment, as shown in Figure 7 , the guide body 21 includes a plurality of avoiding notches, and the plurality of avoiding notches are arranged at intervals around the outer periphery of the suction nozzle body 11. The outer peripheral wall of the suction nozzle body 11 is provided with a ring groove 115, and the ring groove 115 forms a disassembly space with the plurality of avoiding notches.

[0081] The plurality of avoidance gaps are arranged around the outer periphery of the nozzle body 11, which not only forms a disassembly space but also does not occupy too much additional space, thereby optimizing the space utilization while ensuring the convenience of disassembly, making the structure of the entire negative pressure nozzle assembly more compact and reasonable. The disassembly space provides sufficient operating space for the disassembly tool. When the nozzle 10 needs to be disassembled, the operator can insert the tool into the disassembly space, easily clamp or pry the nozzle body 11, and achieve quick disassembly.

[0082] In other possible disassembly methods, such as disassembly from the first end and the second end of the nozzle body 11, the ring groove 115 can also not be provided, or a protrusion can be provided on the outer peripheral wall of the nozzle body 11 corresponding to the avoidance gap, which is convenient for the operator to hold the protrusion for disassembly.

[0083] In another possible implementation, as shown in Figure 9 The guide 20 further includes a connecting portion 23, which is arranged at the second end of the guide body 21 and is used to connect with the nozzle 10.

[0084] The connecting portion 23 is connected with the nozzle 10, and serves as a connecting bridge between the guide body 21 and the nozzle 10, which can provide more secure connection. The connecting portion 23 can ensure that the connection between the guide 20 and the nozzle 10 is not easily loose or separated, and can also ensure the stability of the relative position between the guide 20 and the nozzle 10, thereby enhancing the structural stability of the negative pressure nozzle assembly.

[0085] Specifically, as shown in Figure 9 The connecting portion 23 is connected with the nozzle 10, and serves as a connecting bridge between the guide body 21 and the nozzle 10, which can provide more secure connection. The connecting portion 23 can ensure that the connection between the guide 20 and the nozzle 10 is not easily loose or separated, and can also ensure the stability of the relative position between the guide 20 and the nozzle 10, thereby enhancing the structural stability of the negative pressure nozzle assembly.

[0086] The first protrusion 114 is arranged in the first avoidance hole 231, which provides positioning and support for the connection between the nozzle body 11 and the connecting portion 23. The elastic flange 1141 is lapped with the hole edge of the first avoidance hole 231, which further increases the tightness and firmness of the connection and prevents the nozzle body 11 and the connecting portion 23 from being loose or separated. The elasticity of the elastic flange 1141 allows it to deform automatically during insertion, smoothly enter the first avoidance hole 231 and be lapped with the hole edge, making the installation and disassembly process more simple and efficient, and improving the production efficiency. This connection structure is compact and does not occupy too much space.

[0087] The elastic flange 1141 can be directly lapped on the upper side of the hole edge of the first avoidance hole 231. In order to further improve the assembly firmness, as shown in Figure 4And Figure 6 As shown in the figure, the hole along of the first avoiding hole 231 is provided with a groove 2311, and the elastic flange 1141 is overlapped in the groove 2311.

[0088] The groove 2311 provides a specific accommodation space for the elastic flange 1141, so that the elastic flange 1141 can be more closely combined with the hole along, and this embedded connection increases the contact area and friction of the connection, thereby significantly improving the connection firmness between the nozzle body 11 and the connecting part 23. The groove 2311 can play a positioning and guiding role, ensuring that the elastic flange 1141 is accurately overlapped at the predetermined position, and in the installation process, the operator can more easily insert the first boss 114 of the nozzle body 11 into the first avoiding hole 231 and make the elastic flange 1141 smoothly enter the groove 2311. This design is more compact and efficient, and makes full use of the limited space.

[0089] In this embodiment, as shown in the figure, Figure 4 The outer peripheral wall of the first boss 114 is in interference fit with the inner wall of the first avoiding hole 231.

[0090] The interference fit makes the first boss 114 and the first avoiding hole 231 have a close bonding force, thereby avoiding relative displacement between the two during use, and effectively preventing gas and liquid leakage. In the installation process, the installer can more easily and accurately insert the nozzle body 11 into the connecting part 23, ensuring the correctness of the installation position, without occupying additional space to install fasteners or other connecting devices, thereby improving the installation efficiency.

[0091] In other possible implementations, the outer peripheral wall of the first boss 114 and the inner wall of the first avoiding hole 231 can also be threadedly connected, or a sealing ring is assembled between the two.

[0092] Further, as shown in the figure, Figure 9 The outer peripheral wall of the first boss 114 is provided with a third elastic flange 1142.

[0093] The third elastic flange 1142 can generate additional friction and clamping force when the first boss 114 contacts the inner wall of the first avoiding hole 231, and can also bear some deformation amount. When the negative pressure cup 60 rod is loaded into the nozzle body 11, the elastic properties of the third elastic flange 1142 can adapt to this size change, and ensure the tightness of the connection through its own deformation. At the same time, the third elastic flange 1142 can further enhance the sealing performance, which can effectively prevent gas and liquid leakage.

[0094] Specifically, as shown in the figure, Figure 9 The third elastic flange 1142 includes a plurality of third elastic flanges 1142, which are distributed axially along the outer peripheral surface of the first boss 114.

[0095] The plurality of third elastic convex rings 1142 provide multiple clamping forces at different positions, making the connection between the suction nozzle body 11 and the connecting part 23 more secure when the first convex boss 114 is inserted into the first avoiding hole 231. During the connection process, due to the interference fit and the effect of the elastic convex ring, a certain stress will be generated, and the distribution of the plurality of third elastic convex rings 1142 can disperse the stress to different positions, reduce local stress concentration, and prolong the service life of the connecting part 23.

[0096] Exemplarily, the third elastic convex ring 1142 is two, of course, in other embodiments, the third elastic convex ring 1142 can also be one, three or more, which is not limited here.

[0097] In this embodiment, as shown in Figure 4 and Figure 6 , the connecting part 23 is provided with a rotation stopping part 232, which is used for clamping the lithium battery formation equipment, so as to prevent the guide part 20 from rotating relative to the suction nozzle 10.

[0098] During the operation of the lithium battery formation equipment, various vibrations and external forces may be generated, and if the guide part 20 rotates relative to the suction nozzle 10, it may cause the connection to be loose, affecting the normal operation of the equipment. The setting of the rotation stopping part 232 can effectively prevent the rotation of the guide part 20, ensure that the connection between the suction nozzle 10 and the guide part 20 is always firm, and improve the stability and reliability of the equipment. Or a stopper is provided on the suction nozzle body 11, which cooperates with the connecting part to prevent the guide part 20 from rotating relative to the suction nozzle 10.

[0099] In a possible implementation, as shown in Figure 6 , the rotation stopping part 232 includes a positioning pin extending in a first direction away from the suction nozzle 10.

[0100] The positioning pin can provide clear positioning limitation in the first direction, and can be accurately matched with the corresponding matching structure (such as a positioning hole or a clamping groove) on the lithium battery formation equipment, so as to ensure that the guide part 20 cannot rotate in this direction, effectively prevent the connection from being loose or the position from being deviated due to accidental rotation of the guide part 20, and ensure accurate docking and stable connection of the suction 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.

[0101] In another possible implementation, the positioning pin can also extend in the first direction towards the suction nozzle 10, and a corresponding positioning groove is provided on the suction nozzle body 11.

[0102] In this embodiment, as shown in Figures 9-10As shown, the nozzle body 11 is provided with a magnetic member 116. In this way, when the negative pressure nozzle assembly is disassembled, the negative pressure nozzle assembly can be adsorbed and disassembled by magnetic action, which is convenient and easy to disassemble. Illustratively, the magnetic member 116 can be a metal member, or a plastic member containing magnetic material, etc., which is not limited here.

[0103] The magnetic member 116 can have various implementations, for example, as shown in Figure 10 As shown, the magnetic member 116 is 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 part of the conical structure is provided with a second avoiding 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 member 116 is stressed, the force acts towards the edge of the first end of the nozzle body 11, so that the force acts towards the fit of the opening of the nozzle body 11 and the battery 70, further improving the sealing effect.

[0104] Or in other embodiments, the magnetic member 116 can also be a plurality of magnetic particles or magnetic sheet bodies distributed in the nozzle body 11.

[0105] In this embodiment, as shown in Figure 10 As shown, the conical structure is provided with a third avoiding hole 1162 for avoiding injection liquid. In the manufacturing process of the nozzle body 11, injection molding process is usually used. The third avoiding hole 1162 can make the injection liquid flow more smoothly in the mold, avoiding the interference of the magnetic member 116 to the injection process, so that the nozzle body 11 can be completely formed, improving the production efficiency and product quality.

[0106] In this embodiment, as shown in Figure 11 As shown, the first end of the nozzle body 11 is formed with a conical adsorption surface 117, and the adsorption channel 111 penetrates the small-diameter end of the conical adsorption surface 117.

[0107] Compared with the planar adsorption surface, the conical adsorption surface 117 has a larger surface area, and when it contacts with the liquid injection port of the battery cell, it can provide a larger adsorption area, thereby enhancing the adsorption capacity of the gas and the possible overflow of the electrolyte, and improving the stability of the adsorption. The shape of the conical adsorption surface 117 can guide the gas and the electrolyte to flow to the adsorption channel 111. Since the small-diameter end is located at the center position of the conical adsorption surface 117, the gas and the electrolyte are more easily concentrated to flow to the adsorption channel 111 under the guidance of the conical surface, thereby improving the adsorption efficiency.

[0108] Of course, in other embodiments, in order to be convenient for manufacturing and simple in structure, the first end of the nozzle body 11 can also be provided with a horizontal adsorption surface.

[0109] Further, a plurality of reinforcing support protrusions 1171 are arranged on the conical adsorption surface 117 around the adsorption channel 111. Exemplarily, the reinforcing support protrusions 1171 can be arranged in a wedge-shaped structure as shown, or in a ring-shaped structure, which is not limited herein. Figure 11

[0110] The conical adsorption surface 117 is prone to deformation or damage when in contact with the liquid injection port of the battery cell and subjected to various external forces. The arrangement of the reinforcing support protrusions 1171 can increase the strength of the conical adsorption surface 117 at key positions, improve its ability to resist external forces, disperse local stress, prevent the conical adsorption surface 117 from excessive deformation under pressure, thereby prolonging the service life of the suction nozzle 10, preventing the adsorption surface from collapsing, ensuring the smoothness of the adsorption channel 111 and the normal operation of the negative pressure system.

[0111] The embodiments of the present application also disclose a lithium battery formation equipment, which, as shown in Figs. Figure 1 and Figure 3 includes a mounting frame 50, a negative pressure cup 60 and a negative pressure suction nozzle assembly. The negative pressure cup 60 is assembled on the mounting frame 50, and the negative pressure suction nozzle assembly is connected with the negative pressure cup 60. The negative pressure suction nozzle assembly in the lithium battery formation equipment is the negative pressure suction nozzle assembly described above. Therefore, the lithium battery formation equipment in the embodiments has substantially the same technical effects as the negative pressure suction nozzle assembly. Since the technical effects of the negative pressure suction nozzle assembly have been fully described, they will not be repeated here.

[0112] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.​

Claims

1. A negative pressure nozzle assembly for use on a lithium battery formation apparatus to connect a negative pressure cup (60) and an opening of a battery (70), characterized by, The application relates to a battery mouthpiece. The battery mouthpiece comprises a mouthpiece body (11) provided with a through suction channel (111) in a first direction, the mouthpiece body (11) comprising a first end and a second end in the first direction, the first end being used for assembling with an opening of the battery (70); The battery mouthpiece further comprises a guide part (22) provided at the first end of the guide body (21), the first end of the guide body (21) protruding from the first end of the mouthpiece body (11) in the first direction, the guide part (22) being used for guiding the opening of the battery (70) to assemble into the assembly gap (30).

2. The negative pressure mouthpiece assembly of claim 1, wherein, The guide part (22) is a guide slope (221) provided at the side of the first end of the guide body (21) facing the mouthpiece body (11), the lower edge of the guide slope (221) being radially away from the mouthpiece body (11) compared with the upper edge of the guide slope (221).

3. The negative pressure mouthpiece assembly of claim 1, wherein, The first end of the mouthpiece body (11) is provided with a first elastic boss (113) in the first direction, the outer wall of the first elastic boss (113) being used for cooperating with the reduced diameter part of the opening of the battery (70), the outer wall of the first elastic boss (113) being provided with a first elastic convex ring (1131) used for cooperating with the reduced diameter part of the opening of the battery (70).

4. The negative pressure mouthpiece assembly of claim 1, wherein, The guide part (20) further comprises a connecting part (23) provided at the second end of the guide body (21), the connecting part (23) being used for connecting with a lithium battery formation equipment, the second end of the mouthpiece body (11) being provided with a first boss (114) in the first direction, the connecting part (23) being provided with a first avoiding hole (231) in the first direction, the first boss (114) being arranged in the first avoiding hole (231) and having an avoiding gap (40) with the first avoiding hole (231).

5. The negative pressure mouthpiece assembly of claim 1, wherein, The guide body (21) comprises a plurality of avoiding notches arranged at intervals around the outer wall of the mouthpiece body (11), the outer wall of the mouthpiece body (11) being provided with a ring groove (115), the ring groove (115) and the plurality of avoiding notches forming a dismounting space.

6. The negative pressure mouthpiece assembly of claim 1, wherein, The guide piece (20) further comprises a connecting portion (23) provided at a second end of the guide body (21), the connecting portion (23) being used for connecting with the suction nozzle (10), a first avoiding hole (231) being formed on the connecting portion (23) along the first direction, a second end of the suction nozzle body (11) being formed with a first boss (114) along the first direction, the first boss (114) being arranged in the first avoiding hole (231).

7. The negative pressure mouthpiece assembly of claim 6, wherein, An elastic flange (1141) is arranged at an edge of the first boss (114), the elastic flange (1141) being overlapped with a hole of the first avoiding hole (231), a groove (2311) being arranged at the hole of the first avoiding hole (231), the elastic flange (1141) being overlapped in the groove (2311), an outer peripheral wall of the first boss (114) being interference-fitted with an inner wall of the first avoiding hole (231), the outer peripheral wall of the first boss (114) being provided with a third elastic flange (1142).

8. The negative pressure mouthpiece assembly of claim 7, wherein, A rotation stopping portion (232) is arranged on the connecting portion (23), the rotation stopping portion (232) being used for clamping the lithium battery formation equipment, so as to prevent the guide piece (20) from rotating relative to the suction nozzle (10), the rotation stopping portion (232) comprising a positioning pin, the positioning pin extending along the first direction towards a direction away from the suction nozzle (10).

9. The negative pressure mouthpiece assembly of claim 1, wherein, A magnetic piece (116) is arranged in the suction nozzle body (11).

10. The negative pressure mouthpiece assembly of claim 9, wherein, The magnetic piece (116) is a conical structure, a large-diameter end of the conical structure being close to a first end of the suction nozzle body (11), a middle part of the conical structure being provided with a second avoiding hole (1161) corresponding to the adsorption channel (111).

11. The negative pressure mouthpiece assembly of claim 1, wherein, A conical adsorption surface (117) is formed at the first end of the suction nozzle body (11), the adsorption channel (111) penetrating a small-diameter end of the conical adsorption surface (117), a plurality of reinforcing support protrusions (1171) being arranged around the adsorption channel (111) on the conical adsorption surface (117).

12. A lithium battery formation apparatus, characterized by, The negative pressure cup (60) is assembled on the mounting frame (50), and the negative pressure nozzle assembly is connected with the negative pressure cup (60), the negative pressure nozzle assembly being the negative pressure nozzle assembly according to any one of claims 1-11.

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