A helium injection device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-26
- Publication Date
- 2026-08-11
Smart Images
Figure CN224622660U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery processing and manufacturing technology, and specifically relates to a helium injection device. Background Technology
[0002] During the battery production process, helium testing is required to check the battery's airtightness.
[0003] Helium filling of batteries generally involves primary and secondary helium filling. During primary filling, the helium filling nozzle of the filling device is moved downwards until it makes tight contact with the battery surface, and helium is injected into the battery while ensuring an airtight seal. Secondary helium filling is performed after sealing and welding. Because the testing objectives and battery conditions differ between primary and secondary helium testing, the requirements for the filling position and method also differ. Most existing helium filling devices are fixed and non-adjustable; to meet different testing needs, the only solution is to change the cavity fixture.
[0004] However, this replacement process is not only cumbersome but also extremely time-consuming. Each replacement requires specialized technicians to disassemble and install the parts according to strict operating procedures, and the entire switchover process can take several hours or even longer, severely impacting production continuity and efficiency. Utility Model Content
[0005] This utility model provides a helium injection device to solve the problems of low efficiency and high cost in the helium injection process.
[0006] To solve the above-mentioned technical problems, this utility model is implemented as follows:
[0007] This application provides a helium injection device, including: a drive mechanism, a helium injection assembly, a helium injection nozzle, a vacuum gauge, and a housing;
[0008] The helium injection assembly includes a gas source connector and a gas delivery pipe;
[0009] The gas source connector and the gas guide pipe are interconnected;
[0010] The vacuum gauge is connected to the gas delivery tube;
[0011] The helium injection assembly is fixedly connected to the moving part of the drive mechanism. The end of the gas guide tube away from the drive mechanism passes through the cover plate of the housing and extends into the housing. The helium injection nozzle is fixedly installed at the end of the gas guide tube away from the drive mechanism. The housing has a receiving cavity for placing the battery cell to be injected with helium.
[0012] The drive mechanism is used to drive the helium injection nozzle to move up and down relative to the housing, so as to abut or separate from the hole wall at the cell injection hole in the housing.
[0013] Optionally, the helium injection device further includes a fixing component;
[0014] The fixing component includes a first fixing member and a second fixing member;
[0015] The first fixing member is fixedly connected to the cover plate of the box body, and the second fixing member is sleeved on the air guide pipe and fixedly connected to the first fixing member;
[0016] The first fastener has a first through hole, and the second fastener has a second through hole, wherein the central axis of the first through hole coincides with the central axis of the second through hole.
[0017] Optionally, the helium injection device further includes a third fixing member and a fourth fixing member;
[0018] The third fastener is fixedly connected to the second fastener on the side away from the first fastener;
[0019] The fourth fixing member is sleeved between the air guide tube and the first fixing member; the fourth fixing member is composed of two tubular cylinders with different diameters, and the diameter of the fourth fixing member on the side closer to the third fixing member is larger than the diameter of the fourth fixing member on the side farther away from the third fixing member.
[0020] The third fixing member has a third through hole, and the fourth fixing member has a fourth through hole. The central axis of the third through hole coincides with the central axis of the fourth through hole. The inner diameters of the third through hole and the fourth through hole are the same and are the same as the diameter of the air guide tube.
[0021] The gas guide tube has a limiting device on the side away from the helium injection nozzle. The limiting device is a ring with a diameter larger than that of the gas guide tube and is integrally formed with the gas guide tube.
[0022] Optionally, the helium injection device further includes a sealing assembly;
[0023] The sealing assembly includes a first seal and a second seal;
[0024] The inner wall of the fourth fastener is provided with a first annular groove and a second annular groove;
[0025] The first annular groove is used to place the first seal, and the second annular groove is used to place the second seal.
[0026] Optionally, the sealing assembly further includes a third seal;
[0027] The third sealing element is disposed between the first fixing element and the fourth fixing element.
[0028] Optionally, the sealing assembly further includes a fourth seal;
[0029] The first fixing member has a fourth annular groove on the side near the box body;
[0030] The fourth annular groove is used to place the fourth seal.
[0031] Optionally, the helium injection assembly further includes a connecting valve;
[0032] The connecting valve is provided with a first interface, a second interface, and a third interface, and the first interface, the second interface, and the third interface are interconnected.
[0033] The first interface is connected to the vacuum gauge, the second interface is connected to the gas guide tube, and the third interface is connected to the gas source connector.
[0034] The connecting valve is fixedly connected to the moving part of the drive mechanism.
[0035] Optionally, the helium injection device further includes a fifth fixing element;
[0036] The fifth fixing member is fixedly connected to the fixing part of the drive mechanism, thereby fixing the drive mechanism in a specific position.
[0037] Optionally, the helium injection device further includes a support rod;
[0038] The support rod is disposed between the first fixing member and the fifth fixing member, with one end of the support rod fixedly connected to the first fixing member and the other end fixedly connected to the fifth fixing member.
[0039] Optionally, the helium injection nozzle is a flexible helium injection nozzle.
[0040] In this embodiment, the helium injection device drive mechanism allows the helium injection nozzle to move up and down relative to the housing. This ensures that during the first helium injection, the nozzle abuts against the wall of the cell's liquid injection hole; after liquid injection and battery welding are complete, during the second helium injection, the nozzle moves away from the cell's liquid injection hole. This design eliminates the need to change two devices or two fixtures during helium testing; two helium tests can be completed using a single device. This effectively improves the efficiency and accuracy of the helium injection operation, thereby increasing overall production efficiency and reducing production costs. Attached Figure Description
[0041] Figure 1 This is a schematic diagram of a helium injection device provided in an embodiment of this application;
[0042] Figure 2 yes Figure 1 Side view of the helium injection unit;
[0043] Figure 3 yes Figure 2 Cross-sectional view along the middle AA;
[0044] Figure 4 This is a schematic diagram of the first fastener in an embodiment of this application;
[0045] Figure 5 yes Figure 4 Front view of the first fastener;
[0046] Figure 6 yes Figure 5 Cross-sectional view of the middle BB.
[0047] Figure 7 This is a schematic diagram of the fourth fastener in the embodiments of this application;
[0048] Figure 8 yes Figure 7 Front view of the fourth fastener;
[0049] Figure 9 yes Figure 8 Cross-sectional view along the CC line.
[0050] Explanation of reference numerals in the attached figures:
[0051] Drive mechanism-10, helium injection assembly-20, gas source connector-201, gas guide pipe-202, connecting valve-203, helium injection nozzle-30, vacuum gauge-40, housing-50, fixing assembly-60, first fixing member-601, fourth annular groove-6011, second fixing member-602, third fixing member-603, fourth fixing member-604, first annular groove-6041, second annular groove-6042, fifth fixing member-605, sealing assembly-70, first seal-701, second seal-702, third seal-703, fourth seal-704, support rod-80. Detailed Implementation
[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0053] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0054] The helium injection device provided by the present invention will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0055] During battery production, a helium leak test (referred to as "helium test") is required to check the battery's airtightness. Airtightness issues can lead to battery leakage, affecting battery performance and even causing safety incidents. Therefore, helium leak testing is crucial for ensuring battery quality.
[0056] Helium filling of batteries is generally divided into primary helium filling and secondary helium filling.
[0057] The first helium injection is the initial helium test performed on the battery during the battery production process. This process is typically carried out after the cover plate of the battery cell has been welded before electrolyte injection. Before helium injection, the helium injection device needs to be pre-charged to ensure it is functioning properly. During pre-charging, air is extracted from the cell using a vacuum pump, and then helium is injected into the cell. Simultaneously, the pressure difference is used to detect any leaks inside the battery. If a leak is found at this stage, the helium injection process must be repeated until no leaks are found in any part of the battery.
[0058] Secondary helium injection is a helium testing step performed after the cell is sealed and welded. In this step, a pre-charged helium injection device is used to place the battery into a sealed cavity, inject a certain concentration of helium gas, and maintain this position for a certain period to simulate the actual usage conditions of the cell. Then, the sealed cavity is closed, and the battery's sealing performance is tested using the helium leakage rate. Because helium has low permeability, even tiny pores can be quickly penetrated by helium; therefore, monitoring helium leakage can determine whether the battery's sealing performance meets the standards.
[0059] This application provides the following technical solution to facilitate battery helium testing.
[0060] Example 1
[0061] refer to Figures 1 to 3Embodiment 1 of this application provides a helium injection device, including: a drive mechanism 10, a helium injection assembly 20, a helium injection nozzle 30, a vacuum gauge 40, and a housing 50; the helium injection assembly 20 includes a gas source connector 201 and a gas guide pipe 202; the gas source connector 201 and the gas guide pipe 202 are interconnected; the vacuum gauge 40 is interconnected with the gas guide pipe 202; the helium injection assembly 20 is fixedly connected to the moving part of the drive mechanism 10; one end of the gas guide pipe 202 away from the drive mechanism 10 passes through the cover plate of the housing 50 and extends into the housing 50; the helium injection nozzle 30 is fixedly installed at one end of the gas guide pipe 202 away from the drive mechanism 10; the housing 50 has a receiving cavity for placing the battery cell to be injected with helium; the drive mechanism 10 drives the helium injection nozzle 30 to move up and down relative to the housing 50, so as to abut or separate from the hole wall at the battery cell injection hole in the housing 50.
[0062] The drive mechanism 10 is used to drive the helium injection nozzle 30 to move up and down relative to the housing 50, which can accurately contact the battery cell injection hole, ensuring that helium can be accurately injected into the battery cell, improving the accuracy and stability of helium injection, and effectively avoiding the problem of poor helium injection effect caused by helium injection position deviation.
[0063] The vacuum gauge 40 is connected to the gas delivery tube 202, which can monitor parameters such as pressure in the gas delivery tube 202 in real time. This allows for understanding of the helium injection status, and the helium injection operation can be adjusted in a timely manner based on the monitoring data to ensure the smooth progress of the helium injection process. For example, when the vacuum gauge 40 shows an abnormality, it can determine whether there are problems such as gas leakage and deal with them in a timely manner.
[0064] The gas source connector 201 and the gas guide pipe 202 in the helium injection assembly 20 are interconnected, providing a stable channel for the transmission of helium and ensuring that helium can be continuously and stably transmitted from the gas source to the helium injection nozzle 30, thereby ensuring the efficiency and quality of helium injection.
[0065] The enclosure 50 provides a relatively enclosed space for the helium filling process of the battery cell, reducing the impact of external factors (such as dust, moisture, etc.) on the helium filling of the battery cell, improving the success rate of helium filling and the quality of the battery cell, and at the same time, it can also prevent helium from leaking into the external environment to a certain extent.
[0066] The helium injection assembly 20 is fixedly connected to the moving part of the drive mechanism 10, which ensures the stability and reliability of the helium injection nozzle 30 during the lifting and lowering process, enabling the helium injection nozzle 30 to accurately dock and separate from the battery cell injection hole, thereby improving the overall performance and service life of the helium injection device.
[0067] Specifically, during a single helium injection, helium gas is precisely injected into the battery cell. The helium injection device uses a drive mechanism 10 to precisely bring the helium injection nozzle 30 into contact with the wall of the cell's injection port. The helium injection assembly 20 transmits helium from the gas source through the gas source connector 201 and the gas guide tube 202 to the helium injection nozzle 30, and then injects it into the cell. This process precisely controls the amount and location of helium injection, ensuring uniform and accurate entry of helium into the cell, laying the foundation for accurate subsequent helium testing. Simultaneously, a vacuum gauge 40 monitors the pressure inside the gas guide tube 202 in real time, allowing for timely detection of abnormalities during the helium injection process, such as helium leakage or abnormal injection pressure, enabling timely adjustments and ensuring the quality of the helium injection.
[0068] During the second helium filling process, the helium filling device works in conjunction with the testing equipment to assist in testing the battery's sealing performance. After helium filling is completed, the battery is placed in the helium detection equipment. Since helium has already been injected into the cell, if there is a sealing problem, helium will leak out. At this time, the housing 50 of the helium filling device provides a relatively enclosed space for the battery, which helps reduce the interference of the external environment on the detection, allowing the helium detection equipment to more accurately detect the leaked helium. The above detection process can improve the sensitivity and accuracy of helium detection. The enclosed housing 50 can prevent external helium from mixing in or internal helium from diffusing too quickly, allowing the helium detection equipment to more accurately detect helium leaking from the battery and reduce the probability of false positives and false negatives. In addition, the stable structure and reliable performance of the helium filling device ensure that the battery's helium filling and testing environment are relatively stable during the two helium testing processes, which is conducive to improving the consistency and reliability of the test results, thereby improving the control level of battery production quality.
[0069] In summary, the design of the helium injection device's drive mechanism allows the helium injection nozzle to move up and down relative to the housing. This ensures that during the first helium injection, the nozzle is in contact with the battery cell's injection port, and during the second helium injection, the nozzle moves away from the injection port. This design eliminates the need to change between two devices or fixtures during helium testing; two helium tests can be completed using a single device. This effectively improves the efficiency and accuracy of the helium injection operation, thereby increasing overall production efficiency and reducing production costs.
[0070] Example 2
[0071] Embodiment 2 of this application is a further improvement on the helium injection device in Embodiment 1 of this application. (See reference...) Figures 1 to 3 The helium injection device also includes a fixing component 60; the fixing component 60 includes a first fixing member 601 and a second fixing member 602; the first fixing member 601 is fixedly connected to the cover plate of the housing 50, and the second fixing member 602 is sleeved on the gas guide tube 202 and fixedly connected to the first fixing member 601; the first fixing member 601 has a first through hole, and the second fixing member 602 has a second through hole, the central axis of the first through hole coincides with the central axis of the second through hole, so that the first fixing member 601 and the second fixing member 602 are assembled with the same central axis.
[0072] The fixing component 60 provides a certain degree of protection for the gas delivery tube 202, preventing it from being damaged by external forces such as squeezing or collisions during use. At the same time, it also prevents the gas delivery tube 202 from sagging or deforming due to long-term use or its own weight, ensuring a smooth helium transmission channel and facilitating the normal operation of helium injection.
[0073] The first fixing component 601 is fixedly connected to the cover plate of the housing 50, and the gas guide pipe 202 is firmly connected to the housing 50, making the structure of the entire helium injection device more stable. When the drive mechanism 10 drives the helium injection nozzle 30 to move up and down, it can better withstand the force generated by the movement, reduce wear and loosening between components, and improve the reliability and service life of the device.
[0074] The second fixing member 602 is sleeved on the gas guide tube 202 and fixedly connected to the first fixing member 601. Both are coaxially installed. The first and second through holes ensure the coaxiality of the gas guide tube 202, keeping its position relatively fixed and preventing it from shaking or shifting. This helps ensure accurate alignment between the helium injection nozzle 30 and the battery cell injection port, preventing inaccurate helium injection position due to movement of the gas guide tube 202, and improving the accuracy and stability of helium injection.
[0075] It should be noted that the first fastener 601 can be designed as a plate structure. Its dimensions need to be customized according to the installation area of the cover plate of the housing 50. The plate surface has threaded holes or through holes that match the mounting holes of the cover plate of the housing 50, and fastening is achieved by bolts, screws, or other connecting parts. The first fastener 601 can also be designed as a structure with a central boss. The second fastener 602 can be designed as a cylindrical shape with an inner diameter that matches the outer diameter of the air duct 202. Alternatively, flanges can be provided at one or both ends of the cylindrical structure. The flanges have mounting holes for connecting to the first fastener 601, and the flanges are fastened to the first fastener 601 by bolts or screws. This embodiment of the application does not impose specific limitations here.
[0076] It should also be noted that the first fastener 601 and the second fastener 602 can be made of materials such as stainless steel or aluminum alloy, and this embodiment of the application does not make specific limitations.
[0077] Example 3
[0078] Embodiment 3 of this application is a further improvement on the helium injection device in Embodiment 2 of this application. (See reference...) Figure 3The helium injection device also includes a third fixing member 603 and a fourth fixing member 604; the third fixing member 603 is fixedly connected to the side of the second fixing member 602 away from the first fixing member 601; the fourth fixing member 604 is sleeved between the gas guide tube 202 and the first fixing member 601; the fourth fixing member 604 is composed of two tubular cylinders with different diameters, and the diameter of the side of the fourth fixing member 604 closer to the third fixing member 603 is larger than the diameter of the side of the fourth fixing member 604 away from the third fixing member 603; the third The fixing member 603 has a third through hole, and the fourth fixing member 604 has a fourth through hole. The central axis of the third through hole coincides with the central axis of the fourth through hole, so that the third fixing member 603 and the fourth fixing member 604 are installed on the same central axis. The inner diameter of the third through hole and the fourth through hole is the same as that of the gas guide tube 202. The gas guide tube 202 has a limiting device on the side away from the helium injection nozzle 30. The limiting device is a ring with a diameter larger than that of the gas guide tube 202 and is integrally formed with the gas guide tube 202.
[0079] The third fixing member 603 and the fourth fixing member 604 are coaxially installed, and the inner diameters of the third and fourth through holes are the same as the diameter of the gas guide tube 202. This provides precise positioning for the gas guide tube 202, ensuring its fixed position in the device and preventing the gas guide tube 202 from shaking or shifting during helium injection, thereby ensuring the stability and accuracy of the helium injection operation.
[0080] The third fixing member 603 is fixedly connected to the second fixing member 602 on the side away from the first fixing member 601, and the fourth fixing member 604 is sleeved between the air guide tube 202 and the first fixing member 601. This multi-layer fixing structure enhances the stability of the entire device. In particular, the fourth fixing member 604 is composed of two tubular cylinders with different diameters. The diameter of the cylinder closer to the third fixing member 603 is larger, which increases the contact area and connection stability with the third fixing member 603. This allows the air guide tube 202 to better withstand pressure when subjected to external forces, reduces the risk of component damage, and improves the overall reliability of the device.
[0081] The third fixing member 603 and the fourth fixing member 604 are coaxially mounted, and their through-hole inner diameters are the same as the diameter of the gas guide tube 202, providing precise positioning and support for the gas guide tube 202. The limiting device is a ring integrally formed with the gas guide tube 202 on the side of the gas guide tube 202 away from the helium injection nozzle 30, and its diameter is larger than the diameter of the gas guide tube 202. Since the diameter of the limiting device is the same as the inner diameter of the second fixing member 602, the limiting device can move freely within the second fixing member 602. Furthermore, since the third fixing member 603 is located on the side of the second fixing member 602 away from the first fixing member 601, and the inner diameter of the third fixing member 603 is smaller than the diameter of the limiting device; the fourth fixing member 604 is sleeved between the gas guide tube 202 and the first fixing member 601, and the inner diameter of the fourth fixing member 604 is smaller than the diameter of the limiting device, therefore, during the movement of the gas guide tube 202, the limiting device can restrict the axial movement of the gas guide tube 202, so that the axial movement of the gas guide tube 202 is controlled within a certain range, ensuring that the helium injection nozzle 30 and the battery cell injection hole always maintain a suitable distance and relative position, and avoiding deviation of the helium injection position due to excessive movement of the gas guide tube 202.
[0082] Specifically, during the first helium injection, the gas delivery tube 202 moves towards the battery cell, and the limiting device ensures that the helium injection nozzle 30 just contacts the battery cell's liquid injection hole, preventing it from extending into the battery cell and thus ensuring that the internal structure of the battery cell is not damaged. During the second helium injection, the gas delivery tube 202 moves away from the battery cell, and the limiting device ensures that the helium injection nozzle 30 maintains a certain distance from the battery cell and does not exceed the casing 50, thus completing the second helium injection.
[0083] For repeated helium filling operations involving multiple batteries, this coordination method ensures a high degree of repeatability and consistency in the axial position of the gas guide tube 202 during each filling. Whether it's the first filling or subsequent filling processes, the gas guide tube 202 returns to the same axial position under the action of the limiting device and the third and fourth fixing components 603 and 604, thus achieving precise and repeatable positioning. This ensures that the conditions for each filling are identical, improving the stability and reliability of the filling effect and guaranteeing consistent product quality.
[0084] Because the limiting device ensures the stability of the helium injection position and system, the two helium injection processes are more standardized and regulated, which is crucial for subsequent helium testing. A stable and accurate helium injection process allows for a more uniform and reasonable distribution of helium gas within the cell. During helium testing, issues such as the cell's sealing performance can be detected more accurately, reducing misjudgments or omissions caused by non-standard helium injection processes and improving the accuracy and reliability of helium testing results.
[0085] Example 4
[0086] Embodiment 4 of this application is a further improvement on the helium injection device in Embodiment 3 of this application. (See reference...) Figure 3 , Figures 7 to 9 The helium injection device also includes a sealing assembly 70; the sealing assembly 70 includes a first seal 701 and a second seal 702; the inner wall of the fourth fixing member 604 is provided with a first annular groove 6041 and a second annular groove 6042; the first annular groove 6041 is used to place the first seal 701, and the second annular groove 6042 is used to place the second seal 702.
[0087] The first sealing element 701 and the second sealing element 702 are respectively placed in the first annular groove 6041 and the second annular groove 6042 on the inner wall of the fourth fixing element 604, forming two sealing lines between the gas guide tube 202 and the fourth fixing element 604. When helium is injected, the sealing elements are subjected to a certain pressure and tightly adhere to the inner wall of the gas guide tube 202 and the fourth fixing element 604, effectively preventing helium from leaking out from their gaps, ensuring that all helium can be injected into the battery cell, improving helium injection efficiency and accuracy, and also avoiding helium leakage into the external environment, which would cause waste and safety hazards.
[0088] The dual-seal design increases sealing reliability. The two seals can compensate for different levels of pressure variation and component clearance. Even if one seal experiences slight wear or a leak, the other seal can still provide a seal, thus improving the overall sealing performance and stability of the helium injection system. Furthermore, the annular groove design provides precise installation positioning and fixing methods for the seals, allowing them to function better and further enhancing the sealing effect.
[0089] The sealing component 70 not only prevents helium leakage, but also prevents external dust, impurities and other contaminants from entering the helium injection device. This avoids these contaminants from causing wear or blockage to key components such as the gas delivery pipe 202 and the helium injection nozzle 30, thus protecting the internal structure of the device, extending its service life, and also helping to ensure the purity and stability of the helium injection process and improve product quality.
[0090] It should be noted that the first sealing element 701 and the second sealing element 702 are elastic sealing elements, and their shapes can be O-rings, lip rings, combined sealing rings, wave gaskets or toothed gaskets, etc. The embodiments of this application do not make specific limitations.
[0091] Example 5
[0092] Embodiment 5 of this application is a further improvement on the helium injection device in Embodiment 4 of this application. (See reference...) Figure 3 The sealing assembly 70 also includes a third seal 703; the third seal 703 is disposed between the first fixing member 601 and the fourth fixing member 604.
[0093] A third sealing element 703 is added between the first fixing element 601 and the fourth fixing element 604, providing an additional sealing barrier for the helium injection device and further preventing helium leakage from the gap between the fixing elements. This helps maintain stable pressure during the helium injection process, ensuring that helium is accurately injected into the target location, reducing helium loss, and improving the efficiency and quality of helium injection.
[0094] During device operation, due to factors such as temperature changes and mechanical stress, the first fixing component 601 and the fourth fixing component 604 may undergo a certain degree of deformation or manufacturing tolerance. The third sealing component 703 has a certain degree of elasticity and flexibility, which can fill the irregular gaps between the fixing components caused by deformation or tolerance, ensuring that the sealing effect is not affected and improving the reliability and stability of the device.
[0095] Similar to the first seal 701 and the second seal 702, the third seal 703 prevents external dust, moisture, and other impurities from entering the device. This helps protect the first fixing member 601, the fourth fixing member 604, and other components they connect to or support, such as the air duct 202, from corrosion, wear, or blockage caused by impurities, thereby extending the overall service life of the device and reducing maintenance costs.
[0096] The third seal 703 can also play a role in buffering and shock absorption to a certain extent. It can absorb the relative movement between the first fixing member 601 and the fourth fixing member 604 caused by mechanical vibration or other external forces, reduce the transmission of vibration between components, thereby reducing the vibration level of the entire device, reducing problems such as component loosening, wear and noise caused by vibration, and improving the operational stability and comfort of the device.
[0097] It should also be noted that the third sealing element 703 is an elastic sealing element, and its shape can be an O-ring, a lip ring, a combined sealing ring, a wave gasket, or a toothed gasket, etc. The embodiments of this application do not specifically limit it.
[0098] Example 6
[0099] Embodiment Six of this application is a further improvement on the helium injection device in Embodiment Four of this application. (See reference...) Figure 3 , Figures 4-6 The sealing assembly 70 also includes a fourth seal 704; the first fixing member 601 is provided with a fourth annular groove 6011 on the side near the housing 50; the fourth annular groove 6011 is used to place the fourth seal 704.
[0100] The fourth seal 704 adds another layer of sealing to the helium injection device, preventing helium from leaking from the connection between the first fixing member 601 and the housing 50. This further improves the overall sealing of the device, ensuring precise control of helium during injection, reducing leakage losses, and improving injection efficiency and quality. It also effectively prevents dust, moisture, and other impurities from entering the device from outside the housing 50, avoiding corrosion, wear, or blockage of the first fixing member 601 and connected components. This protects the normal operation of the internal structure and extends the device's service life.
[0101] During installation, there may be some installation error or gap between the first fixing member 601 and the housing 50. The fourth sealing member 704 has a certain degree of elasticity and plasticity, which can fill these gaps, compensate for installation errors, and make the connection between the first fixing member 601 and the housing 50 tighter and more stable, thus ensuring the overall stability of the device.
[0102] During the operation of the helium injection device, the first fixing component 601 and the housing 50 may deform to a certain extent due to factors such as temperature changes and pressure fluctuations. The fourth sealing component 704 can adapt to these deformations and maintain its sealing performance through its own elastic deformation, ensuring that helium leakage and impurity intrusion can be effectively prevented under various operating conditions.
[0103] It should be noted that the fourth sealing element 704 is an elastic sealing element, and its shape can be an O-ring, a lip ring, a combined sealing ring, a wave gasket, or a toothed gasket, etc. The embodiments of this application do not specifically limit it.
[0104] Example 7
[0105] Embodiment 7 of this application is a further improvement on the helium injection device in Embodiment 1 of this application. (See reference...) Figure 3 The helium injection assembly 20 also includes a connecting valve 203; the connecting valve 203 is provided with a first interface, a second interface and a third interface, which are interconnected; the first interface is interconnected with the vacuum gauge 40, the second interface is interconnected with the gas guide pipe 202, and the third interface is interconnected with the gas source connector 201; the connecting valve 203 is fixedly connected to the moving part of the drive mechanism 10.
[0106] The connecting valve 203 connects the vacuum gauge 40, the gas delivery pipe 202, and the gas source connector 201 through three interfaces, forming a centralized gas path control node. This makes the helium flow path clearer and more controllable, facilitating precise adjustment and monitoring of the entire helium injection process.
[0107] Since the first interface is connected to the vacuum gauge 40, the connecting valve 203 can reflect the pressure changes in the gas delivery pipe 202 in real time. Operators can use the vacuum gauge 40 to monitor the pressure during the helium injection process at any time, promptly detect abnormalities and make adjustments to ensure that the helium injection pressure is stable and meets process requirements.
[0108] The connecting valve 203, being a three-way valve, allows for flexible switching of the gas path's on / off state as needed. For example, before helium injection, the gas delivery tube 202 can be connected to the vacuum gauge 40 via the connecting valve 203 to perform a vacuuming operation; during helium injection, the gas source connector 201 is connected to the gas delivery tube 202 to inject helium. This flexibility improves the convenience and efficiency of the helium injection operation.
[0109] The connecting valve 203 is fixedly connected to the moving part of the drive mechanism 10, making the gas path control component and the drive mechanism 10 a single unit, reducing the space occupied by the device and improving the compactness of the structure. This not only facilitates the installation and layout of the device, but also reduces the complexity of the gas path system, reduces leakage points, and improves the reliability of the device. Furthermore, since the connecting valve 203 is fixedly connected to the moving part of the drive mechanism 10, when the drive mechanism 10 drives the helium injection nozzle 30 to move up and down, the connecting valve 203 will also move synchronously. This ensures that the gas path connection remains stable during the contact or separation process between the helium injection nozzle 30 and the battery cell injection port, avoiding gas path distortion or loosening caused by relative movement, and ensuring the continuity and stability of the helium injection process.
[0110] Example 8
[0111] Embodiment 8 of this application is a further improvement on the helium injection device in Embodiment 2 of this application. (See reference...) Figures 1 to 3 The helium injection device also includes a fifth fixing member 605; the fifth fixing member 605 is fixedly connected to the fixing part of the drive mechanism 10, fixing the drive mechanism 10 in a specific position.
[0112] The fifth fixing component 605 secures the drive mechanism 10 in a specific position, ensuring that the drive mechanism 10 is in an accurate position. This allows connected components such as the helium injection nozzle 30 to precisely align with target positions such as the cell injection hole during operation, improving the accuracy and consistency of helium injection and preventing problems such as incorrect helium injection position or inaccurate helium volume due to positional deviation of the drive mechanism 10. It also provides stable support for the drive mechanism 10, reducing its shaking and vibration during operation. This helps ensure the smoothness of the helium injection process, preventing damage to other components of the helium injection device due to unstable movement of the drive mechanism 10, and also improves the quality and efficiency of helium injection.
[0113] When the drive mechanism 10 is working, the fifth fixing member 605 can effectively transmit the force generated by the drive mechanism 10 to the fixed base, while bearing the reaction force, ensuring that the drive mechanism 10 can normally drive the helium nozzle 30 and other components to work, without causing damage or failure of the mechanism due to imbalance of forces. When maintenance or replacement of the drive mechanism 10 is required, the fifth fixing member 605 can also be quickly positioned and disassembled, reducing maintenance costs and difficulty.
[0114] Example 9
[0115] Embodiment 9 of this application is a further improvement on the helium injection device in Embodiment 8 of this application. (See reference...) Figures 1 to 3 The helium injection device also includes a support rod 80; the support rod 80 is disposed between the first fixing member 601 and the fifth fixing member 605, one end of the support rod 80 is fixedly connected to the first fixing member 601, and the other end is fixedly connected to the fifth fixing member 605.
[0116] The support rod 80 connects the first fixing member 601 and the fifth fixing member 605, enhancing the structural stability of the entire helium injection device. Through the support of the support rod 80, relative displacement or deformation of the first fixing member 601 and the fifth fixing member 605 is effectively prevented when subjected to external forces or vibrations generated during device operation, ensuring that the relative positions of each component remain fixed, thereby guaranteeing the normal operation of the helium injection device. The precise determination of the distance and relative position between the first fixing member 601 and the fifth fixing member 605 ensures that they maintain an appropriate spacing. This is crucial for the layout and space utilization of the internal components, facilitating the proper installation and normal operation of other components such as the helium injection assembly 20 and the sealing assembly 70, and ensuring the overall performance of the helium injection device.
[0117] Because the support rod 80 connects two key fixed components, it increases the rigidity and damping of the structure, effectively absorbing and attenuating the vibrations generated during the operation of the device, reducing the impact of vibrations on the accuracy and stability of the helium injection device, improving the device's vibration resistance, and making the helium injection operation more precise and reliable.
[0118] During the operation of the device, especially when the drive mechanism 10 works to drive the movement of related components, various forces are generated. The support rod 80 can distribute these forces to the first fixing member 601 and the fifth fixing member 605, avoiding excessive local stress, reducing the risk of component damage, and extending the service life of the device.
[0119] Example 10
[0120] Embodiment 10 of this application is a further improvement on the helium injection device in Embodiments 1 to 9 of this application. The helium injection nozzle 30 is a flexible helium injection nozzle.
[0121] The flexible helium filling nozzle automatically adjusts its fit to the shape and size of the cell's filling hole, ensuring a better seal and effectively preventing helium leakage. This guarantees the accuracy and safety of the helium filling process. Because the flexible nozzle can quickly and tightly connect to the filling hole, it reduces helium leakage and filling time, thereby improving overall filling efficiency. Its elasticity provides cushioning upon contact with the cell, preventing damage to the cell surface caused by rigid contact and helping to maintain the cell's integrity and performance.
[0122] The flexible helium injection nozzle has a certain deformation capability, which can adapt to various sizes and shapes of battery cell injection holes, improving the versatility and applicability of the helium injection device and reducing the need to replace the helium injection nozzle 30 due to changes in battery cell specifications.
[0123] During the contact between the helium injection nozzle 30 and the battery cell and the helium injection process, the elastic material can absorb some of the vibration and impact energy, thereby reducing the noise generated during device operation and improving the working environment.
[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A helium injection device, characterized in that, The helium injection device includes: a drive mechanism (10), a helium injection assembly (20), a helium injection nozzle (30), a vacuum gauge (40), and a housing (50); The helium injection assembly (20) includes a gas source connector (201) and a gas delivery pipe (202); The gas source connector (201) and the gas guide pipe (202) are interconnected; The vacuum gauge (40) is connected to the gas guide tube (202); The helium injection assembly (20) is fixedly connected to the moving part of the drive mechanism (10). The end of the gas guide tube (202) away from the drive mechanism (10) passes through the cover plate of the housing (50) and extends into the housing (50). The helium injection nozzle (30) is fixedly installed at the end of the gas guide tube (202) away from the drive mechanism (10). The housing (50) has a receiving cavity for placing the battery cell to be injected with helium. The drive mechanism (10) is used to drive the helium injection nozzle (30) to move up and down relative to the housing (50) so as to abut or separate from the hole wall at the cell injection hole in the housing (50).
2. The helium injection device according to claim 1, characterized in that, The helium injection device also includes a fixing component (60); The fixing components include a first fixing member (601) and a second fixing member (602); The first fixing member (601) is fixedly connected to the cover plate of the box body (50), and the second fixing member (602) is sleeved on the air guide pipe (202) and fixedly connected to the first fixing member (601); The first fastener (601) has a first through hole, and the second fastener (602) has a second through hole, wherein the central axis of the first through hole coincides with the central axis of the second through hole.
3. The helium injection device according to claim 2, characterized in that, The helium injection device also includes a third fixing member (603) and a fourth fixing member (604); The third fastener (603) is fixedly connected to the side of the second fastener (602) away from the first fastener (601); The fourth fixing member (604) is sleeved between the air guide tube (202) and the first fixing member (601); the fourth fixing member (604) is composed of two tubular cylinders with different diameters, and the diameter of the fourth fixing member (604) on the side closer to the third fixing member (603) is larger than the diameter of the fourth fixing member (604) on the side farther away from the third fixing member (603); The third fixing member (603) has a third through hole, and the fourth fixing member (604) has a fourth through hole. The central axis of the third through hole coincides with the central axis of the fourth through hole. The inner diameters of the third through hole and the fourth through hole are the same and the same as the diameter of the air guide tube (202). The gas guide tube (202) has a limiting device on the side away from the helium injection nozzle (30). The limiting device is a ring with a diameter larger than that of the gas guide tube (202) and is integrally formed with the gas guide tube (202).
4. The helium injection device according to claim 3, characterized in that, The helium injection device also includes a sealing assembly (70); The sealing assembly (70) includes a first seal (701) and a second seal (702); The inner wall of the fourth fastener (604) is provided with a first annular groove (6041) and a second annular groove (6042); The first annular groove (6041) is used to place the first seal (701), and the second annular groove (6042) is used to place the second seal (702).
5. The helium injection device according to claim 4, characterized in that, The sealing assembly (70) further includes a third seal (703); The third sealing element (703) is disposed between the first fixing element (601) and the fourth fixing element (604).
6. The helium injection device according to claim 4, characterized in that, The sealing assembly (70) further includes a fourth seal (704); The first fixing member (601) has a fourth annular groove (6011) on the side near the box body (50); The fourth annular groove (6011) is used to place the fourth seal (704).
7. The helium injection device according to claim 1, characterized in that, The helium injection assembly (20) also includes a connecting valve (203); The connecting valve (203) is provided with a first interface, a second interface and a third interface, and the first interface, the second interface and the third interface are interconnected; The first interface is connected to the vacuum gauge (40), the second interface is connected to the gas guide tube (202), and the third interface is connected to the gas source connector (201). The connecting valve (203) is fixedly connected to the moving part of the drive mechanism (10).
8. The helium injection device according to claim 2, characterized in that, The helium injection device also includes a fifth fixing component (605); The fifth fixing member (605) is fixedly connected to the fixing part of the drive mechanism (10) to fix the drive mechanism (10) in a specific position.
9. The helium injection device according to claim 8, characterized in that, The helium injection device also includes a support rod (80); The support rod (80) is disposed between the first fixing member (601) and the fifth fixing member (605). One end of the support rod (80) is fixedly connected to the first fixing member (601), and the other end is fixedly connected to the fifth fixing member (605).
10. The helium injection device according to any one of claims 1-9, characterized in that, The helium injection nozzle (30) is an elastic helium injection nozzle.