Negative pressure formation suction nozzle and battery production line
By designing a buffer chamber structure in the negative pressure formation nozzle, the problem of electrolyte backflow was solved, the fatigue resistance and sealing performance of the nozzle were improved, and the replacement cost was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-24
AI Technical Summary
When using a negative pressure nozzle, electrolyte may adhere to the electrolyte inlet or remain on the battery casing, affecting subsequent manufacturing processes.
A negative pressure formation nozzle was designed, comprising a nozzle body and a nozzle head. The nozzle body has a negative pressure channel, and the nozzle head has an air intake channel. A bend is provided at the end of the air intake channel to form a buffer cavity. The bend fits the inner wall of the negative pressure channel with a clearance to prevent electrolyte backflow.
After the negative pressure device is completed, the residual electrolyte is stored in the buffer chamber to prevent it from flowing back to the battery filling port or the outer casing, which improves the fatigue resistance and sealing of the nozzle and reduces replacement costs.
Smart Images
Figure CN224036405U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a negative pressure formation nozzle and a battery production line. Background Technology
[0002] The formation process is one of the most critical processes in the production of lithium-ion batteries. Negative pressure formation is achieved by adjusting the internal gas pressure of the battery through a pressure control system and drawing away the gas generated during formation from the battery's liquid injection port through a negative pressure suction nozzle.
[0003] When using the negative pressure nozzle in the related technology, electrolyte may adhere to the electrolyte port or remain on the battery casing. Utility Model Content
[0004] In view of the above problems, this application provides a negative pressure formation nozzle and a battery production line, which can solve the problem that when the negative pressure nozzle is used, the electrolyte will adhere to the electrolyte port or remain on the battery casing.
[0005] To solve the above-mentioned technical problems, in a first aspect, this application proposes a negative pressure formation nozzle, comprising:
[0006] The nozzle body has a negative pressure channel inside, which is used to connect to the air pipe connector of the negative pressure device.
[0007] The suction head has an air intake channel inside and is located at the end of the suction head away from the air tube connector. The air intake channel is connected to the negative pressure channel.
[0008] The air intake channel has a bend at one end facing the negative pressure channel, and the bend is located at the end of the negative pressure channel facing the air intake channel;
[0009] The bent portion extends along a first direction, and a gap is provided between the bent portion and the inner wall of the negative pressure channel. The bent portion and the end of the negative pressure channel facing the intake channel form a buffer cavity, wherein the first direction intersects the axial direction.
[0010] In the technical solution of this application embodiment, when the vacuuming action of the negative pressure device ends, the electrolyte remaining in the air tube and the mouthpiece body will be stored in the buffer chamber and will not flow back along the inner wall of the mouthpiece body; when the negative pressure device is completed and the vacuum is broken, the electrolyte remaining in the mouthpiece body and the buffer chamber is subjected to sudden change in environmental pressure and has a tendency to flow back. However, due to the limitation of the structure of the buffer chamber itself, the electrolyte can only flow inside the buffer chamber, avoiding its backflow to the battery filling port, which would cause the electrolyte to adhere to the electrolyte port or remain on the battery casing.
[0011] In some embodiments, the negative pressure channel includes a first channel and a second channel that are axially connected, wherein the diameter of the first channel is larger than the diameter of the second channel;
[0012] The end of the first channel away from the second channel is used to connect to the air pipe connector of the negative pressure device, and the second channel is connected to the inhalation channel;
[0013] The air intake channel has a bend at one end facing the second channel, and the bend is located at the end of the second channel facing the air intake channel;
[0014] There is a gap between the bent portion and the inner wall of the second channel, and the bent portion and the end of the second channel facing the suction channel form a buffer cavity. Since the diameter of the second channel is smaller than that of the first channel, the radial wall thickness of the second channel is larger, and the overall deformation of the lower end of the nozzle body is small. During formation, the lower end of the nozzle body will not undergo severe deformation when subjected to suction pressure, resulting in high fatigue strength.
[0015] In some embodiments, the bottom wall of the buffer cavity has a concave structure. This allows the buffer cavity to hold a larger amount of electrolyte.
[0016] In some embodiments, the end of the first channel away from the second channel is chamfered, and the diameter of the chamfer gradually increases along the direction from the second channel to the first channel. This facilitates the insertion of the air tube from the negative pressure device into the first channel.
[0017] In some embodiments, the nozzle body and the nozzle head are detachably connected. This allows the nozzle head to be removed from the nozzle body and replaced when it becomes worn, avoiding the need to replace the entire negative pressure forming nozzle and effectively reducing costs.
[0018] In some embodiments, a positioning hole is provided at the end of the nozzle body facing the nozzle head, and a positioning post is provided at the end of the nozzle head facing the nozzle body, the positioning post engaging with the positioning hole. In this way, the nozzle head and nozzle body can be easily connected together through the engagement of the positioning post and the positioning hole.
[0019] In some embodiments, the nozzle body and the nozzle head are integrally formed.
[0020] In some embodiments, the nozzle body has protrusions on its circumferential sidewalls. This increases the overall strength of the nozzle body and prevents deformation during operation.
[0021] In some embodiments, the end of the nozzle head facing away from the nozzle body is a planar structure. This allows the nozzle head to fit tightly against the battery filling port, facilitating communication between the air intake channel and the filling port.
[0022] Secondly, this application proposes a battery production line, including a negative pressure formation nozzle as described in any one of the embodiments of this application.
[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0025] Figure 1 This is a schematic diagram of the structure of a negative pressure forming nozzle provided in some embodiments of this application;
[0026] Figure 2 for Figure 1 Internal structure diagram;
[0027] Figure 3 for Figure 1 A sectional view;
[0028] Figure 4 for Figure 3 A partial schematic diagram;
[0029] Figure 5 This is a schematic diagram of the structure of another negative pressure formation nozzle provided in some embodiments of this application;
[0030] Figure 6 for Figure 5 A schematic diagram of the nozzle head;
[0031] Figure 7 for Figure 6 A sectional view.
[0032] The reference numerals in the detailed embodiments are as follows:
[0033] 10. Nozzle body; 101. Negative pressure channel; 102. First channel; 103. Second channel; 104. Protrusion; 105. Chamfer; 106. Boss; 11. Nozzle head; 111. Suction channel; 112. Bending part; 113. Buffer cavity; 1131. Bottom wall; 12. Positioning hole; 13. Positioning post. Detailed Implementation
[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0040] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0042] The formation process is one of the most critical processes in the production of lithium-ion batteries. Negative pressure formation is achieved by adjusting the internal gas pressure of the battery through a pressure control system and drawing away the gas generated during formation from the battery's liquid injection port through a negative pressure suction nozzle.
[0043] As the gas generated during battery formation is removed, a portion of the gaseous electrolyte is also removed, and a portion of the liquid electrolyte is drawn off the battery along the inner wall of the gas tube.
[0044] After the gas produced by the chemical reaction is completely removed, the inside of the battery is basically under high negative pressure. At the moment of separation between the formation nozzle and the battery filling port, the electrolyte remaining in the formation nozzle and the air tube will overflow or spray. The overflowing electrolyte adheres to the electrolyte port or remains on the battery casing, thus affecting subsequent manufacturing processes.
[0045] Based on the above considerations, in order to solve the problem that electrolyte may adhere to the electrolyte port or remain on the battery casing during use, a negative pressure formation nozzle is designed. This negative pressure formation nozzle includes a nozzle body and a nozzle head. The nozzle body has a negative pressure channel for connecting to the air pipe connector of a negative pressure device. The nozzle head has an air intake channel located at the end of the nozzle body away from the air pipe connector, and the air intake channel is connected to the negative pressure channel. A bend is provided at the end of the air intake channel facing the negative pressure channel. The bend extends along a first direction, and a gap is provided between the bend and the inner wall of the negative pressure channel. The bend and the end of the negative pressure channel facing the air intake channel form a buffer cavity, wherein the first direction intersects the axial direction.
[0046] In the technical solution of this application embodiment, when the vacuuming action of the negative pressure device ends, the electrolyte remaining in the air tube and the mouthpiece body will be stored in the buffer chamber and will not flow back along the inner wall of the mouthpiece body; when the negative pressure device is completed and the vacuum is broken, the electrolyte remaining in the mouthpiece body and the buffer chamber is subjected to sudden change in environmental pressure and has a tendency to flow back. However, due to the limitation of the structure of the buffer chamber itself, the electrolyte can only flow inside the buffer chamber, avoiding its backflow to the battery filling port, which would cause the electrolyte to adhere to the electrolyte port or remain on the battery casing.
[0047] According to some embodiments of this application, Figure 1 This is a schematic diagram of the negative pressure formation nozzle in this application. Figure 2 for Figure 1 Internal structure diagram. Figure 3 for Figure 1 sectional view, Figure 4 for Figure 3 A partial schematic diagram. (For example...) Figures 1-4 As shown, this application provides a negative pressure formation nozzle, which includes a nozzle body 10 and a nozzle head 11. The nozzle body 10 has a negative pressure channel 101 for connecting to the tracheal connector of a negative pressure device. The nozzle head 11 has an air intake channel 111 and is located at the end of the nozzle body 10 away from the tracheal connector. The air intake channel 111 is connected to the negative pressure channel 101. A bend 112 is provided at the end of the air intake channel 111 facing the negative pressure channel 101. The bend 112 is located at the end of the negative pressure channel 101 facing the air intake channel 111. The bend 112 extends along a first direction and has a gap with the inner wall of the negative pressure channel 101. The bend 112 and the end of the negative pressure channel 101 facing the air intake channel 111 form a buffer cavity 113. The first direction intersects with the axial direction.
[0048] In this embodiment, the suction head 11 can be integrally formed with the suction head body 10, or the suction head 11 can be connected to the suction head body 10 by bolts. The specific method can be determined according to the actual situation, and this embodiment does not limit it.
[0049] refer to Figure 3 As shown, the X-axis direction is the axial direction, and the Y-axis direction is the first direction. The bent portion 112 at the upper end of the suction channel 111 is integrally formed with the suction channel 111, and the upper end of the suction channel 111 is connected to the negative pressure channel 101 through the suction channel 111.
[0050] In this embodiment, the bent portion 112 extends along the Y-axis direction. At the same time, there is a gap between the bent portion 112 and the inner wall of the negative pressure channel 101, and the bent portion 112 is located inside the negative pressure channel 101. In this way, the bent portion 112 and the lower end of the negative pressure channel 101 form a buffer cavity 113. At this time, since the bent portion 112 extends along the Y-axis direction, the bent portion 112 can at least block the opening portion on the upper side of the buffer cavity 113, so as to reduce the opening portion on the upper side of the buffer cavity 113.
[0051] During the battery formation process, the suction channel 111 on the suction head 11 is aligned with the electrolyte inlet of the matching battery. The negative pressure channel 101 is connected to the air pipe connector of the negative pressure device to generate negative pressure, so that the suction channel 111 and the negative pressure channel 101 generate negative pressure. In this way, the suction force generated at the contact point between the suction channel 111 and the electrolyte inlet draws out the gas generated during formation. At this time, a portion of the gaseous or liquid electrolyte will also be drawn away. The drawn-out electrolyte is drawn away sequentially through the electrolyte inlet of the battery, the suction channel 111, and the negative pressure channel 101.
[0052] When the negative pressure device finishes its suction operation, the electrolyte remaining in the air tube and the mouthpiece body 10 will be stored in the buffer chamber 113 and will not flow back along the inner wall of the mouthpiece body 10.
[0053] When the negative pressure device is completed and the vacuum is broken, the residual electrolyte in the nozzle body 10 and the buffer chamber 113 is subjected to a sudden change in environmental pressure and has a tendency to flow back. However, due to the limitation of the structure of the buffer chamber 113 itself, the bend 112 prevents the electrolyte in the buffer chamber 113 from flowing back. The electrolyte can only flow inside the buffer chamber 113, preventing it from flowing back to the battery filling port, causing the electrolyte to adhere to the electrolyte port or remain on the battery casing.
[0054] According to some embodiments of this application, such as Figure 3 As shown, the negative pressure channel 101 includes a first channel 102 and a second channel 103 connected along the axial direction, wherein the diameter of the first channel 102 is larger than the diameter of the second channel 103; the end of the first channel 102 away from the second channel 103 is used to connect to the air pipe connector of the negative pressure device, and the second channel 103 is connected to the inhalation channel 111; a bend 112 is provided at the end of the inhalation channel 111 facing the second channel 103, and the bend 112 is located at the end of the second channel 103 facing the inhalation channel 111; there is a gap between the bend 112 and the inner wall of the second channel 103, and the bend 112 and the end of the second channel 103 facing the inhalation channel 111 form a buffer cavity 113.
[0055] In this embodiment, since the diameter of the second channel 103 is smaller than the diameter of the first channel 102, the wall thickness of the nozzle body 10 in the radial direction at the second channel 103 is larger. This results in greater overall strength at the lower end of the nozzle body 10 and less deformation. During formation, the lower end of the nozzle body 10 will not undergo severe deformation when subjected to suction pressure, exhibiting high fatigue resistance.
[0056] According to some embodiments of this application, such as Figure 4 As shown, the bottom wall 1131 of the buffer cavity 113 has a concave structure. In this way, the buffer cavity 113 can hold a larger amount of electrolyte.
[0057] According to some embodiments of this application, such as Figure 3 As shown, the end of the first channel 102 away from the second channel 103 is provided with a chamfer 105, the diameter of which gradually increases along the direction from the second channel 103 to the first channel 102. This facilitates the insertion of the air tube on the negative pressure device into the first channel 102.
[0058] According to some embodiments of this application, the nozzle body 10 and the nozzle head 11 are detachably connected.
[0059] In this embodiment, the nozzle body 10 and the nozzle head 11 can be connected together by bolts, or the nozzle body 10 and the nozzle head 11 can be snapped together. The specific connection can be determined according to the actual situation, and this embodiment does not limit the connection.
[0060] Since the nozzle body 10 and the nozzle head 11 are detachably connected, when the nozzle head 11 is worn, it can be removed from the nozzle body 10 and replaced, avoiding the need to replace the entire negative pressure forming nozzle, thus effectively reducing costs.
[0061] According to some embodiments of this application, such as Figure 5 and combined Figure 6 , Figure 7 As shown, a positioning hole 12 is provided at one end of the nozzle body 10 facing the nozzle head 11, and a positioning post 13 is provided at one end of the nozzle head 11 facing the nozzle body 10. The positioning post 13 cooperates with the positioning hole 12.
[0062] In this embodiment, a boss 106 is provided at one end of the suction head 11 of the suction body 10. The boss 106 has a plurality of positioning holes 12 evenly distributed along the axial direction. At the same time, a plurality of positioning posts 13 are also evenly distributed at one end of the suction head 11 facing the suction body 10. The positioning posts 13 can be interference-fitted with the positioning holes 12 so that the suction head 11 can be stably connected to the suction body 10.
[0063] In this embodiment, by inserting the positioning pin 13 into the positioning hole 12, the nozzle head 11 can be easily connected to the nozzle body 10.
[0064] According to some embodiments of this application, the nozzle body 10 and the nozzle head 11 are integrally formed. This ensures a tight seal between the nozzle body 10 and the nozzle head 11, preventing pressure leakage between the nozzle body 10 and the nozzle head 11 during vacuuming.
[0065] According to some embodiments of this application, such as Figure 4 As shown, the nozzle body 10 has protrusions 104 on its circumferential sidewalls. This increases the overall strength of the nozzle body 10 and prevents it from deforming during operation.
[0066] According to some embodiments of this application, such as Figure 5 As shown, the end of the nozzle head 11 facing away from the nozzle body 10 has a flat structure. This allows the nozzle head 11 to fit tightly against the battery filling port, facilitating a tight connection between the air intake channel 111 and the filling port.
[0067] This application also provides a battery production line, including a negative pressure formation nozzle as described in any of the embodiments of this application.
[0068] The specific structure of the negative pressure formation nozzle in this embodiment refers to the above embodiment. Since the battery production line adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A negative pressure formation nozzle, characterized by, The application relates to a negative pressure forming nozzle. The nozzle body is internally provided with a negative pressure channel for connecting a tracheal connector of a negative pressure device. The nozzle head is internally provided with an air suction channel, and the nozzle head is arranged at one end of the nozzle body away from the tracheal connector. The air suction channel is provided with a bending part at one end facing the negative pressure channel. The bending part is provided with a gap with the inner wall of the negative pressure channel.
2. The negative pressure formation mouthpiece of claim 1, wherein, The first channel is provided with a chamfer at one end away from the second channel. The nozzle body and the nozzle head are detachably connected. The nozzle body is provided with a positioning hole at one end facing the nozzle head. The nozzle head is provided with a positioning column at one end facing the nozzle body.
3. The negative pressure formation mouthpiece of claim 2, wherein, The nozzle body and the nozzle head are integrally formed.
4. The negative pressure formation mouthpiece of claim 2, wherein, The nozzle body is provided with a convex part around the circumferential side wall.
5. The negative pressure formation mouthpiece according to any one of claims 1 to 4, characterized in that The nozzle head is provided with a plane structure at one end away from the nozzle body.
6. The negative pressure formation mouthpiece of claim 5, wherein, The application further relates to a negative pressure forming nozzle comprising any one of the negative pressure forming nozzles as claimed in claims 1 to 9.
7. The negative pressure formation mouthpiece according to any one of claims 1 to 4, characterized by 8. The negative pressure formation mouthpiece according to any one of claims 1 to 4, characterized by 9. The negative pressure formation mouthpiece according to any one of claims 1 to 4, characterized by 10. A battery production line, characterized by,