Liquid injection sleeve head for lithium ion battery liquid injection machine
By designing an injection nozzle for a lithium-ion battery injection machine, the problem of electrolyte impacting the top of the core was solved, achieving internal tightness and stability of the battery, reducing operational difficulty and safety risks, and extending battery life.
Patent Information
- Application Number
- CN202423038493.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In existing lithium-ion battery electrolyte injection methods, if the injection speed is too fast, the electrolyte may directly impact the top of the core, causing it to loosen, affecting the internal tightness and stability of the battery, and even posing a safety hazard.
The lithium-ion battery filling machine uses a filling head, which includes a filling channel, a flat baffle, and cylindrical and conical parts inside the filling head body. The conical part is provided with several filling openings. The electrolyte is injected from multiple directions through multiple small streams. Combined with the design of threaded grooves, anti-slip textures, sealing grooves and monitoring holes, it ensures stable connection, sealing and real-time monitoring.
It improves the uniformity of liquid injection, avoids local loosening of the battery cells, enhances the internal compactness and stability of the battery, reduces the difficulty of operation and safety hazards, and extends the battery life.
Smart Images
Figure CN223566841U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of lithium battery manufacturing, in particular to a liquid injection sleeve head for a lithium ion battery liquid injection machine. BACKGROUND
[0002] As the core of modern energy storage technology, lithium ion batteries are widely used in portable electronic devices, electric vehicles and energy storage systems, etc. One of the core manufacturing processes is electrolyte injection, which directly relates to the performance and safety of the battery. The electrolyte injection process not only requires uniform distribution of electrolyte, but also needs to strictly control the injection amount to avoid negative effects on battery performance. To achieve this goal, lithium ion battery manufacturers generally use automatic liquid injection equipment, and the liquid injection gun as a key component is responsible for accurately and efficiently delivering electrolyte to the inside of the battery cell.
[0003] In the related art, the lithium ion battery liquid injection is to insert the liquid injection gun into the liquid injection port of the battery cell cover plate, and then inject the electrolyte into the battery cell through the gun port. The defect of this liquid injection method is that when the liquid injection speed is too fast, the electrolyte may directly impact the top of the winding core, causing the impacted area to become loose, affecting the tightness and stability of the battery interior, and even potential safety hazards may occur, so there is room for improvement. Utility model content
[0004] In order to solve the problem that the liquid injection gun easily causes impact on the winding core, the application provides a liquid injection sleeve head for a lithium ion battery liquid injection machine.
[0005] The application provides a liquid injection sleeve head for a lithium ion battery liquid injection machine, which adopts the following technical scheme:
[0006] A liquid injection sleeve head for a lithium ion battery liquid injection machine, comprising a sleeve head main body arranged at the liquid injection gun port, a liquid injection channel is formed in the sleeve head main body, a flat baffle is arranged at the bottom of the sleeve head main body, the sleeve head main body comprises a cylindrical part and a conical part, the cylindrical part and the conical part are in communication, the conical part is arranged on the side of the cylindrical part away from the liquid injection gun, a plurality of liquid injection openings are arranged on the conical part, and the plurality of liquid injection openings are arranged in sequence along the circumferential direction of the conical part.
[0007] The lithium ion battery liquid injection is to insert the liquid injection gun into the cover plate of the battery cell through the gun mouth to inject the electrolyte into the battery cell, and the defect of the liquid injection method is that when the liquid injection speed is too fast, the electrolyte may directly impact the top of the winding core, so that the impacted area becomes loose, which affects the tightness and stability of the battery, and even safety hazards may occur; by adopting the technical scheme, the sleeve head body, the sleeve head body inner shape injection channel, the flat baffle is installed at the bottom of the sleeve head body, the sleeve head body is composed of a cylindrical part and a conical part, and a plurality of injection openings are penetrated on the conical part; by arranging the sleeve head body and the plurality of injection openings, a plurality of injection openings are penetrated on the conical part, and the openings are arranged along the circumferential direction of the conical part; when the electrolyte is injected into the battery cell, the electrolyte is no longer impacted at a single point at a high speed, but is dispersed into a plurality of small streams and injected from multiple directions, which greatly reduces the direct impact force of the electrolyte on the top of the battery cell, avoids the loosening problem of the local area, improves the liquid injection uniformity, ensures the tightness and stability of the battery cell, and prolongs the service life of the battery.
[0008] Optionally, a threaded slot for connecting with the liquid injection gun mouth is arranged in the sleeve head body, and the threaded slot is arranged in the cylindrical part of the sleeve head body.
[0009] By adopting the technical scheme, the threaded slot is arranged in the cylindrical part of the sleeve head body; by arranging the threaded slot, the liquid injection gun mouth can be connected with the sleeve head body tightly and stably, firmly and reliably, and the threaded slot is convenient to install and disassemble; the operator only needs to rotate the sleeve head body to realize the connection or separation of the liquid injection gun, thereby improving the disassembly efficiency and reducing the operation difficulty.
[0010] Optionally, anti-slip textures for increasing friction are arranged on the outer wall of the cylindrical part, and the anti-slip textures are arranged along the length direction of the cylindrical part.
[0011] By adopting the technical scheme, the anti-slip textures are integrally formed on the outer wall of the cylindrical part; by arranging the anti-slip textures, the friction between the hands of the operator and the outer wall of the cylindrical part can be increased, so that the operation is stable when the sleeve head body is disassembled, the risk that the liquid injection sleeve head slips from the hands of the operator due to the electrolyte, oil stains or other factors is reduced, and the stability of disassembly is ensured.
[0012] Optionally, a plurality of dispersion grooves for guiding the electrolyte are arranged on the flat baffle, and the plurality of dispersion grooves are sequentially arranged from the center of the flat baffle to the direction of the corresponding injection opening.
[0013] By adopting the technical scheme, the several dispersion grooves are arranged on the flat baffle; the flow path and the contact area of the electrolyte on the flat baffle are increased through the arrangement of the several dispersion grooves, the flow speed of the electrolyte is slowed down, the electrolyte can be guided along the dispersion grooves and dispersed to different areas inside the battery cell, and the electrolyte is helped to be injected at different positions of the battery cell, thereby reducing the local impact on the battery cell and improving the uniformity of the injection.
[0014] Optionally, a sealing groove is arranged at the interface of the cylindrical part, and a sealing gasket for sealing is arranged in the sealing groove.
[0015] By adopting the technical scheme, the sealing groove is arranged at the interface of the cylindrical part, and the sealing gasket is arranged in the sealing groove; through the arrangement of the sealing groove and the sealing gasket, the sealing property between the injection sleeve head and the injection gun is ensured, the sealing gasket is usually made of elastic material such as rubber or silicone, and can be tightly filled in the sealing groove to reduce the risk of leakage of the electrolyte from the connection during the injection process.
[0016] Optionally, an assembly groove is arranged on the bottom wall of the sealing groove, and an annular protrusion for matching the assembly groove is arranged on the sealing gasket.
[0017] By adopting the technical scheme, the assembly groove is arranged on the bottom wall of the sealing groove, and the sealing gasket is integrally formed with the annular protrusion, and the annular protrusion matches the assembly groove; through the arrangement of the assembly groove and the annular protrusion, the assembly groove provides a positioning point for the sealing gasket, ensures the correct position of the sealing gasket, and guarantees the reliability of the sealing.
[0018] Optionally, a monitoring hole for monitoring the flow condition of the internal electrolyte is arranged through the cylindrical part, and the monitoring hole is arranged at a height of three-quarters of the height of the cylindrical part.
[0019] By adopting the technical scheme, the monitoring hole is arranged on the cylindrical part; when the injection sleeve head is blocked, the electrolyte cannot flow smoothly into the inside of the battery cell, but gradually fills the internal space of the injection sleeve head; at this time, the electrolyte will seep out from the gap between the threaded connection of the cylindrical part and the injection gun, and flow out through the monitoring hole; by observing whether the electrolyte flows out of the monitoring hole, the operator can timely find the blocking condition and take corresponding solving measures; through the arrangement of the monitoring hole, the flow condition of the electrolyte can be monitored in real time, and the internal electrolyte condition of the injection sleeve head can be directly observed, which helps to reduce the production interruption and safety accidents caused by injection blockage.
[0020] Optionally, a drip-proof ring groove for preventing dripping is arranged on the outside of the cylindrical part, the drip-proof ring groove is arranged along the circumferential direction of the cylindrical part, and the monitoring hole is in communication with the drip-proof ring groove.
[0021] By adopting the technical scheme, the anti-dripping ring groove is arranged on the cylindrical part, and the monitoring hole is in communication with the anti-dripping ring groove; through the arrangement of the anti-dripping ring groove, the dripping of the electrolyte from the outside of the liquid injection sleeve head during the electrolyte injection process is effectively reduced, an additional collection area is provided, the electrolyte can flow along the ring groove instead of directly dripping onto the equipment or the ground, and the working environment is kept clean and safe.
[0022] In summary, the present application has at least one of the following beneficial technical effects:
[0023] Through the arrangement of the sleeve head body and the plurality of liquid injection openings, a plurality of liquid injection openings are arranged through the conical part, and the openings are arranged along the circumferential direction of the conical part. When the electrolyte is injected into the battery, the electrolyte is no longer impacted from a single point at high speed, but is dispersed into multiple small streams and injected from multiple directions, greatly reducing the direct impact force of the electrolyte on the top of the battery, avoiding the problem of looseness in the local area, improving the uniformity of liquid injection, ensuring the tightness and stability of the battery, and prolonging the service life of the battery.
[0024] Through the arrangement of the threaded slot, the liquid injection gun nozzle can be tightly and stably connected with the sleeve head body, which is firm and reliable, and facilitates installation and disassembly. The operator only needs to rotate the sleeve head body to realize connection or separation of the liquid injection gun, thereby improving the disassembly efficiency and reducing the operation difficulty.
[0025] Through the arrangement of the monitoring hole, the flow of the electrolyte can be monitored in real time, and the electrolyte inside the liquid injection sleeve head can be directly observed, which helps to reduce production interruption and safety accidents caused by liquid injection blockage. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a structure diagram of a liquid injection sleeve head for a lithium ion battery liquid injection machine in an embodiment of the present application.
[0027] Figure 2 is a top view of a liquid injection sleeve head for a lithium ion battery liquid injection machine in an embodiment of the present application.
[0028] Figure 3 is Figure 2 A-A sectional view in
[0029] Figure 4 is Figure 3 A portion of
[0030] Figure 5 is a front view of a liquid injection sleeve head for a lithium ion battery liquid injection machine in an embodiment of the present application.
[0031] Explanation of reference signs: 1, sleeve body; 11, cylindrical part; 12, conical part; 2, liquid injection channel; 3, flat baffle; 4, liquid injection opening; 5, threaded notch; 6, anti-skid texture; 7, dispersion groove; 8, sealing groove; 81, assembly groove; 9, sealing washer; 91, annular protrusion; 10, monitoring hole; 13, anti-dripping ring groove. DETAILED DESCRIPTION
[0032] The following will be described in detail in combination with the accompanying Figures 1-5 Further detailed description will be made to the present application.
[0033] The present application discloses a kind of lithium ion battery liquid injection machine with liquid injection sleeve. Refer to Figure 1 , lithium ion battery liquid injection machine with liquid injection sleeve includes sleeve body 1, sleeve body 1 is installed in the liquid injection gun mouth of liquid injection machine in the present embodiment.
[0034] Refer to Figure 1 And Figure 2 , liquid injection channel 2 is formed in sleeve body 1, liquid injection channel 2 can be supplied with electrolyte in liquid injection gun into the inside of sleeve body 1, flat baffle 3 is installed at the bottom of sleeve body 1, while sleeve body 1 includes cylindrical part 11 and conical part 12, cylindrical part 11 is integrally formed with conical part 12, and conical part 12 is located at the side of cylindrical part 11 away from liquid injection gun.
[0035] Refer to Figure 2 And Figure 4 , sealing groove 8 is provided at the interface of cylindrical part 11, sealing washer 9 is installed in sealing groove 8, and the sealing washer 9 in the present embodiment is usually made of elastic material, such as rubber or silicone, which can be tightly filled in sealing groove 8, reducing the risk of electrolyte leakage during liquid injection.
[0036] Refer to Figure 2 And Figure 4 , assembly groove 81 is provided on the bottom wall of sealing groove 8, annular protrusion 91 is integrally formed on sealing washer 9, annular protrusion 91 is matched with assembly groove 81, assembly groove 81 provides a positioning point for sealing washer 9, ensuring the correct position of sealing washer 9 and ensuring the reliability of sealing.
[0037] Refer to Figure 2 And Figure 3 , threaded notch 5 is provided in cylindrical part 11 of sleeve body 1, and the liquid injection gun of the liquid injection machine in the present embodiment has a threaded part matched therewith, so that the liquid injection gun mouth can be tightly and stably connected with the sleeve body 1, which is firm and reliable, and is convenient to install and disassemble. The operator only needs to rotate the sleeve body 1 to realize the connection or separation of the liquid injection gun, which improves the disassembly efficiency and reduces the operation difficulty.
[0038] Refer toFigure 2 And Figure 5 At the same time, the outer wall of the cylindrical part 11 is integrally formed with anti-skid textures 6 arranged along the length direction of the cylindrical part 11, which can increase the friction between the hands of the operator and the outer wall of the cylindrical part 11, so that the operation is stable when the sleeve head body 1 is disassembled and assembled, and the risk of the liquid injection sleeve head slipping from the hands of the operator due to the smoothness caused by the electrolyte, oil stains or other factors is reduced, and the stability of disassembly and assembly is ensured.
[0039] Referring to Figure 2 And Figure 5 , the monitoring holes 10 are provided through the cylindrical part 11, and in the embodiment, the monitoring holes 10 are provided at three-fourths of the height of the cylindrical part 11, and the number of monitoring holes 10 can be multiple groups; when the liquid injection sleeve head is blocked, the electrolyte cannot flow smoothly into the inside of the battery cell, but gradually fills the internal space of the liquid injection sleeve head. At this time, the electrolyte will seep out from the gap between the cylindrical part 11 and the threaded connection of the liquid injection gun, and flow out through the monitoring holes 10. By observing whether the electrolyte flows out of the monitoring holes 10, the operator can timely find the blocking condition and take corresponding solving measures; the electrolyte flow condition can be monitored in real time, and the internal electrolyte condition of the liquid injection sleeve head can be directly observed, which helps to reduce production interruption and safety accidents caused by liquid injection blockage.
[0040] Referring to Figure 2 And Figure 5 , the anti-dripping ring groove 13 is provided on the outside of the cylindrical part 11, and the anti-dripping ring groove 13 is provided along the circumferential direction of the cylindrical part 11. The plurality of monitoring holes 10 are connected with the inside of the anti-dripping ring groove 13; the electrolyte can be effectively prevented from dripping from the outside of the liquid injection sleeve head during the liquid injection process, an additional collection area can be provided, the electrolyte can flow along the ring groove instead of directly dripping onto the equipment or the ground, and the working environment can be kept clean and safe.
[0041] Referring to Figure 2 And Figure 5 , the plurality of liquid injection openings 4 are provided through the conical part 12, and the plurality of liquid injection openings 4 are arranged in sequence and spaced along the circumferential direction of the conical part 12. In the embodiment, the liquid injection openings 4 are inclinedly provided towards the direction of the bottom flat baffle 3; when the electrolyte is injected into the battery cell, the electrolyte is no longer impacted from a single point at high speed, but is dispersed into a plurality of small streams and injected from the plurality of liquid injection openings 4, so that the direct impact force of the electrolyte on the top of the battery cell is greatly reduced, and the problem of looseness in the local area is avoided.
[0042] Referring to Figure 2The flat baffle plate 3 is provided with a plurality of dispersion grooves 7, and in this embodiment, the plurality of dispersion grooves 7 are sequentially provided from the center of the flat baffle plate 3 towards the corresponding liquid injection opening 4, thereby increasing the flow path and contact area of the electrolyte on the flat baffle plate 3, slowing down the flow rate of the electrolyte, guiding and dispersing the electrolyte into different areas inside the battery cell along the dispersion grooves 7, and helping to reduce the concentrated injection of the electrolyte at a certain point on the top of the battery cell, thereby reducing the local impact on the battery cell and improving the uniformity of the liquid injection.
[0043] The implementation principle of the injection sleeve head of the lithium ion battery liquid injection machine according to the embodiment of the application is as follows: when the battery cell is being injected, the injection sleeve head body 1 is installed on the liquid injection gun and is tightly fixed by thread groove 5 and the liquid injection gun port, the liquid injection machine is started, the electrolyte flows into the injection channel 2 in the sleeve head body 1 through the liquid injection gun, the electrolyte enters the tapered portion 12 through the cylindrical portion 11, and flows out from the plurality of liquid injection openings 4 uniformly distributed on the tapered portion 12, when the predetermined injection amount is reached, the liquid injection machine is turned off, and the sleeve head body 1 is removed for cleaning and maintenance.
[0044] During the injection process, the operator continuously monitors the monitoring hole 10 on the cylindrical portion 11, if it is found that the electrolyte flows out of the monitoring hole 10 and then flows into the external anti-dripping ring groove 13, it indicates that the injection channel 2 may be blocked, once this phenomenon is observed, the operation of the liquid injection machine is immediately stopped, the connection with the electrolyte supply is disconnected, the sleeve head body 1 is disassembled, and whether there is impurity or crystalline blockage in the sleeve head body 1 is checked, appropriate tools (such as a long cleaning needle or compressed air) are used to try to clean the blocked liquid injection openings 4 and possible internal channels, after cleaning is completed, the sleeve head body 1 is reinstalled, and a small flow of electrolyte injection test is performed, whether the electrolyte still flows out of the monitoring hole 10 and the anti-dripping ring groove 13 is observed, and the electrolyte can be ensured to flow out smoothly before the electrolytic injection can be resumed.
[0045] Through the sleeve head body 1 and the plurality of liquid injection openings 4, a plurality of liquid injection openings 4 are provided through the tapered portion 12 and are sequentially and spaced apart along the circumferential direction of the tapered portion 12, when the electrolyte is injected into the battery cell, it is no longer a single point high-speed impact, but is dispersed into multiple small flow beams and injected from multiple directions, greatly reducing the direct impact force of the electrolyte on the top of the battery cell, avoiding the loosening problem of the local area, improving the uniformity of the liquid injection, and ensuring the tightness and stability of the battery cell. At the same time, by optimizing the liquid injection method, the internal damage and safety hazards of the battery cell caused by too fast or too large impact during liquid injection are reduced, and the service life of the battery is prolonged.
[0046] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape, principle of the application should be covered within the protection scope of the application.
Claims
1. A liquid injection sleeve for a lithium ion battery liquid injection machine, comprising a sleeve body (1) arranged at the liquid injection gun nozzle, characterized in that: The sleeve body (1) is provided with a liquid injection channel (2), the bottom of the sleeve body (1) is provided with a flat baffle (3), the sleeve body (1) comprises a cylindrical part (11) and a tapered part (12), the cylindrical part (11) is communicated with the tapered part (12), the tapered part (12) is arranged on the side of the cylindrical part (11) away from the liquid injection gun, a plurality of liquid injection openings (4) are arranged on the tapered part (12), and the plurality of liquid injection openings (4) are arranged in sequence along the circumferential direction of the tapered part (12).
2. The injection sleeve head for a lithium ion battery liquid injection machine according to claim 1, characterized in that: The sleeve body (1) is provided with a liquid injection channel (2), the bottom of the sleeve body (1) is provided with a flat baffle (3), the sleeve body (1) comprises a cylindrical part (11) and a tapered part (12), the cylindrical part (11) is communicated with the tapered part (12), the tapered part (12) is arranged on the side of the cylindrical part (11) away from the liquid injection gun, a plurality of liquid injection openings (4) are arranged on the tapered part (12), and the plurality of liquid injection openings (4) are arranged in sequence along the circumferential direction of the tapered part (12).
3. The injection sleeve head for a lithium-ion battery liquid injection machine according to claim 2, characterized in that: The outer wall of the cylindrical part (11) is provided with anti-skid texture (6) for increasing friction, and the anti-skid texture (6) is arranged along the length direction of the cylindrical part (11).
4. The injection sleeve head for a lithium ion battery liquid injection machine according to claim 1, characterized in that: The flat baffle (3) is provided with a plurality of dispersion grooves (7) for guiding electrolyte, and the plurality of dispersion grooves (7) are sequentially arranged from the center of the flat baffle (3) to the corresponding liquid injection opening (4).
5. The injection sleeve according to claim 1, wherein: The interface of the cylindrical part (11) is provided with a sealing groove (8), and the sealing groove (8) is provided with a sealing gasket (9) for sealing.
6. The injection sleeve head for a lithium ion battery liquid injection machine according to claim 5, characterized in that: The bottom wall of the sealing groove (8) is provided with a mounting groove (81), and the sealing gasket (9) is provided with an annular protrusion (91) matched with the mounting groove (81).
7. The injection sleeve according to claim 1, wherein: The cylindrical part (11) is provided with a monitoring hole (10) for monitoring the flow of internal electrolyte, and the monitoring hole (10) is arranged at three-fourths of the height of the cylindrical part (11).
8. The injection sleeve according to claim 7, characterized in that: The outer part of the cylindrical part (11) is provided with a drip-proof ring groove (13) for preventing dripping, the drip-proof ring groove (13) is arranged along the circumferential direction of the cylindrical part (11), and the monitoring hole (10) is communicated with the drip-proof ring groove (13).