Sealing ring, bell lower disc and liquid injection device

Abstract

The application discloses a sealing ring, a bell lower disc and a liquid injection device. The sealing ring comprises a ring-shaped body part and a ring-shaped cover part. The body part comprises opposite inner and outer sides and opposite first and second ends. The cover part is arranged at the first end of the body part. The cover part protrudes relative to the inner side of the body part to form a first protruding eave. The cover part protrudes relative to the outer side of the body part to form a second protruding eave. At least one of the first and second protruding eaves is provided with a groove close to the first end surface of the body part.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a sealing ring, a bell jar lower plate, and a liquid injection device. Background Technology

[0002] Secondary batteries and other energy storage devices are widely used as the main power source for electrical devices such as mobile phones, laptops, vehicles, and drones due to their recyclability. In the battery manufacturing process, the electrolyte injection process is one of the key steps. This process requires the battery to be placed in a sealed chamber before the electrolyte is injected into the battery, allowing it to conduct electrons between the positive and negative electrodes. Currently, the airtightness of the battery chamber is typically achieved by using a dovetail-shaped sealing ring between two components to be sealed (e.g., an upper and lower component).

[0003] However, during the injection process, foreign matter, such as electrolyte crystals, can easily accumulate between the dovetail structure and the part to be sealed, affecting the sealing effect of the sealing ring and thus leading to poor sealing of the chamber. Summary of the Invention

[0004] In view of the above problems, this application provides a sealing ring, a bell jar lower plate, and a liquid injection device.

[0005] In a first aspect, this application provides a sealing ring. The sealing ring includes an annular body portion and an annular cover portion. The body portion includes an inner side and an outer side facing away from each other, and a first end and a second end facing each other. The cover portion is disposed at the first end of the body portion, the cover portion protruding relative to the inner side of the body portion to form a first eave, the cover portion protruding relative to the outer side of the body portion to form a second eave, and at least one of the first eave and the second eave has a groove near the first end face of the body portion.

[0006] In the above technical solution, during the process of the sealing ring engaging with the upper and lower sealing components, the sealing ring is compressed by the upper and / or lower sealing components, causing the sides of the groove to deform outwards. The gas inside the groove is squeezed out, and the compressed body portion fills the groove until the bottom surface of the groove is tightly fitted with the lower sealing component, thus forming a good seal. Furthermore, if there are small foreign objects in the groove, the pressure will expel them along with the groove, and the bottom surface of the groove will also tightly fit with the lower sealing component, forming a good seal. If the foreign object is large, the groove can accommodate it. In this case, the first end face of the first eaves and the first end face of the second eaves can remain tightly fitted with the lower sealing component, still forming a good seal.

[0007] As an optional technical solution of this application, the groove is cut into an annular cross section by a plane perpendicular to the axial direction of the sealing ring, and the bottom surface of the groove is arc-shaped.

[0008] In the above technical solution, the arc shape has no sharp corners, which ensures that the two sides of the groove deform outwards. When the gas inside the groove is squeezed out, the bottom surface of the groove completely fits the surface of the lower part to be sealed, making it difficult for gas to remain. In addition, the arc-shaped bottom surface can also distribute the force more evenly when the sealing ring is subjected to compressive force, so that the bottom surface of the groove can evenly and completely fit the upper surface of the lower part to be sealed.

[0009] As an optional technical solution of this application, when both the first and second eaves have grooves on their first end faces, the two grooves are symmetrically arranged about the body portion.

[0010] In the above technical solution, the two grooves are symmetrically arranged about the body, which allows the first and second protrusions to be evenly stressed during the process of pressing the sealing ring down on the upper part to be sealed, ensuring that the bottom surfaces of the two grooves can fit perfectly with the upper surface of the lower part to be sealed, thus forming good airtightness.

[0011] As an optional technical solution of this application, the two grooves have the same capacity and the same bottom surface shape.

[0012] In the above technical solution, the capacity and bottom shape of the two grooves are the same, which can ensure that the deformation response of the two grooves to the extrusion force is consistent during the process of the sealing ring being subjected to extrusion force, ensuring that the sealing ring is subjected to uniform force, and thus ensuring that the bottom surface of the two grooves fits perfectly with the upper surface of the lower part to be sealed to form good airtightness.

[0013] As an optional technical solution of this application, the covering part includes a second end face opposite to the first end face, and the second end face is arched.

[0014] In the above technical solution, firstly, the second end face is arched, meaning it has a certain upward convex arc. Compared to a flat second end face or one with a dovetail groove, the second end face allows electrolyte crystals to slide off the arched surface, preventing electrolyte crystals from remaining on the second end face. This ensures that there is no gap after the sealing ring is pressed against the upper sealing element, improving airtightness. Secondly, the arched shape of the second end face also prevents the formation of a negative pressure zone when the second end face is pressed against the upper sealing element, which would result in a large suction force between the second end face and the bell housing. This would cause the sealing ring to be pulled out of the limiting groove on the lower sealing element and fall off during the process of the upper sealing element rising and separating from the lower sealing element, affecting the sealing effect between the upper and lower sealing elements and the bell housing and flange assembly.

[0015] As an optional technical solution of this application, the second end of the main body is provided with a plurality of mutually spaced openings, which are used to adjust the force inside the main body.

[0016] In the above technical solution, the second end of the main body is provided with multiple openings spaced apart from each other. When the openings are squeezed and expanded, the sidewalls on both sides of the openings are stretched open, and the inner and outer sides of the main body can fit more tightly against the sidewall of the limiting groove on the lower sealing component. This increases the friction between the main body and the sidewall of the limiting groove on the lower sealing component, preventing the sealing ring from being pulled out of the limiting groove on the lower sealing component and falling off by the upper sealing component during the process of the upper sealing component rising and separating from the lower sealing component, thus affecting the sealing effect when the upper sealing component and the lower sealing component re-join.

[0017] As an optional technical solution of this application, the sealing ring further includes a mating member disposed in the opening, the mating member being used to press against the sidewall of the opening.

[0018] In the above technical solution, the sidewall of the opening is expanded by the fitting part, and the sidewalls on both sides of the opening are spread open by the fitting part. The inner and outer sides of the main body can be more closely attached to the sidewall of the limiting groove on the lower sealing part, thereby increasing the friction between the main body and the sidewall of the limiting groove on the lower sealing part. This prevents the sealing ring from being pulled out of the limiting groove on the lower sealing part and falling off by the upper sealing part during the process of the upper sealing part rising and separating from the lower sealing part, which would affect the sealing effect when the upper sealing part and the lower sealing part re-join.

[0019] As an optional technical solution of this application, there are multiple openings, and adjacent openings are evenly distributed in the circumferential direction of the body.

[0020] In the above technical solution, adjacent openings are evenly distributed in the circumferential direction of the body, that is, the circumferential spacing of adjacent openings on the body is the same. This allows for the uniform application of compressive force in the circumferential direction of the body, enabling all parts of the body to fit more tightly against the side wall of the upper limit groove of the lower sealing element. This prevents the sealing ring from being pulled out of the limit groove on the lower sealing element by the upper sealing element during the process of the upper sealing element rising and separating from the lower sealing element, thus affecting the sealing effect when the upper and lower sealing elements re-join.

[0021] As an optional technical solution of this application, in the axial direction of the sealing ring, the depth of the opening is less than or equal to half the length of the body portion.

[0022] In the above technical solution, the depth of the opening is less than or equal to half the length of the body, so that after the sealing ring is pressed down on the upper sealing element, the inner and outer sides of the body remain tightly attached to the limiting groove and will not sink into the opening, thus ensuring the sealing effect of the sealing ring.

[0023] As an optional technical solution of this application, in the direction perpendicular to the axial direction of the sealing ring, the ratio of the size W1 of the opening to the size W2 of the body portion ranges from [1 / 2, 2 / 3].

[0024] In the above technical solution, the ratio of the opening size W1 to the body size W2 is in the range of [1 / 2, 2 / 3], which can ensure that the thickness of the side wall of the opening is appropriate, that is, it can transmit the extrusion force of the mating part on the side wall of the opening to the side wall of the limiting groove on the lower sealing part, increase the extrusion force between the body and the side wall of the limiting groove, and also support the sealing ring in the axial direction of the sealing ring.

[0025] This application provides a bell-shaped lower plate. The bell-shaped lower plate includes a flange assembly and a sealing ring as described in any embodiment. The sealing ring is mounted on the flange assembly.

[0026] In the above technical solution, during the process of the sealing ring engaging with the upper sealing element (bell jar) and the lower plate of the bell jar, the sealing ring is compressed by the upper sealing element and / or the flange assembly (lower sealing element). The sides of the groove deform outwards, the gas inside the groove is squeezed out, and the compressed body portion fills the groove until the bottom surface of the groove is tightly fitted with the flange assembly, thus forming a good seal. Furthermore, if there are small foreign objects in the groove, the pressure will expel them along with the groove, and the bottom surface of the groove will also tightly fit with the flange assembly, forming a good seal. If the foreign objects are large, the groove can accommodate them. In this case, the first end face of the first eaves and the first end face of the second eaves can remain tightly fitted with the flange assembly, still forming a good seal.

[0027] As an optional technical solution of this application, the flange assembly includes a flange and a mounting plate installed on the flange. The upper surface of the mounting plate is provided with an annular limiting groove, the body portion is accommodated in the limiting groove, and the covering portion is located outside the limiting groove and fits against the upper surface of the mounting plate.

[0028] In the above technical solution, the main body of the sealing ring is located in the limiting groove. When the bell jar presses down on the lower plate of the bell jar, the main body can be tightly filled in the limiting groove. The cover part is located outside the limiting groove. When the bell jar presses down on the lower plate of the bell jar, the cover part can fit between the bell jar and the mounting plate, thereby achieving a good seal between the sealing ring and the flange assembly.

[0029] As an optional technical solution of this application, the flange includes a bottom, a side, and a plurality of flange portions. The side extends from the periphery of the bottom, and the plurality of flange portions protrude from the side towards the central axis of the flange. The plurality of flange portions are spaced apart from each other around the central axis of the flange. The bottom, the side, and the flange portions form a receiving cavity, and the mounting plate is housed in the receiving cavity. In the direction of the central axis of the flange, the gap between the plurality of flange portions corresponds to the covering portion.

[0030] In the above technical solution, after the bell jar descends to fit against the lower plate of the bell jar, there are gaps between the multiple flange portions, and these gaps correspond to the covering portions. When the bell jar and the lower plate of the bell jar are engaged, the protrusions on the bell jar pass through the gaps, and the lower end of the bell jar applies pressure to the covering portion of the sealing ring for the first time, pressing the sealing ring tightly between the bell jar and the flange assembly to form a good seal. Furthermore, if the flange assembly rotates, the sealing ring will rotate with the flange assembly, and the bell jar will apply pressure to the sealing ring again, making the sealing ring even more tightly located between the bell jar and the flange assembly, thus improving the sealing effect.

[0031] This application provides a liquid injection device. The liquid injection device includes a bell jar and a lower plate of the bell jar, wherein the bell jar is movably disposed above the lower plate of the bell jar.

[0032] In the above technical solution, during the assembly of the bell housing and its lower plate, the sealing ring is compressed by the bell housing and / or flange assembly. The sides of the groove deform outwards, expelling the gas inside the groove. The compressed body portion fills the groove until the bottom surface of the groove is tightly fitted with the flange assembly, forming a good seal. Furthermore, if there are small foreign objects in the groove, the pressure will expel them along with the groove, and the bottom surface of the groove will also tightly fit with the flange assembly, forming a good seal. If the foreign object is large, the groove can accommodate it. In this case, the first end face of the first eaves and the first end face of the second eaves can remain tightly fitted with the flange assembly, still forming a good seal.

[0033] As an optional technical solution of this application, the outer side wall of the bell jar near the lower plate of the bell jar is provided with a plurality of mutually spaced protrusions, and the plurality of protrusions correspond to the plurality of gaps between the plurality of flange portions on the flange of the flange assembly.

[0034] In the above technical solution, the multiple protrusions correspond to the multiple gaps between the multiple flange portions on the flange plate in the flange assembly. When the bell and the lower plate of the bell are joined, the protrusions on the bell pass through the gaps, causing the sealing ring to be pressed tightly between the bell and the flange assembly, forming a good seal. Furthermore, if the flange assembly rotates, the sealing ring will rotate with the flange assembly, and the bell will apply pressure to the sealing ring again, making the sealing ring more tightly located between the bell and the flange assembly, thus improving the sealing effect.

[0035] 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

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments 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:

[0037] Figure 1 This is a perspective view of an injection device according to some embodiments of this application;

[0038] Figure 2 for Figure 1 A schematic diagram of the assembly of the lower plate of the bell jar of the liquid injection device shown;

[0039] Figure 3 for Figure 2 An exploded view of the lower plate of the bell jar shown;

[0040] Figure 4 for Figure 2 A cross-sectional assembly diagram of the lower plate of the bell jar is shown.

[0041] Figure 5 for Figure 2 An exploded cross-sectional view of the lower plate of the bell jar shown.

[0042] Figure 6 for Figure 3 A three-dimensional schematic diagram of the sealing ring in the lower plate of the bell jar;

[0043] Figure 7 for Figure 6 An enlarged schematic diagram of the sealing ring VII shown;

[0044] Figure 8 for Figure 7 An enlarged schematic diagram of the sealing ring VIII shown;

[0045] Figure 9 for Figure 4 An enlarged schematic diagram of the lower plate IX of the bell jar shown.

[0046] Explanation of key component designations:

[0047] Injection device 1000; bell jar 100; outer wall 10; protrusion 20; lower plate of bell jar 300;

[0048] Sealing ring 30; Body part 31; Inner side 311; Outer side 313; First end 315; Second end 317; Opening 3171; Side wall 31711; Covering part 33; First protrusion 331; Second protrusion 333; Groove 332; Bottom surface 3320; First groove 3321; Second groove 3323; First end face 335; Second end face 337; Mating part 35;

[0049] Flange assembly 50; flange 51; bottom 511; side 513; flange part 515; clearance 5151; receiving cavity 517; mounting plate 53; upper surface 531; limiting groove 533; side wall 5331; axis X. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0054] 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.

[0055] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0056] 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", "circumferential", etc., 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 do not 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.

[0057] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components.

[0058] Please see Figure 1 and Figure 2 This application provides a liquid injection device 1000, which includes a bell jar 100 and a lower plate of the bell jar 300, with the bell jar 100 movably disposed above the lower plate of the bell jar 300.

[0059] Specifically, the electrolyte injection device 1000 is a device used during battery manufacturing to inject electrolyte into the battery. The electrolyte injection device 1000 includes two parts to be sealed, such as an upper part and a lower part. During the electrolyte injection process, after the battery is placed in the electrolyte injection device 1000, the upper and lower parts are tightly pressed together to form a sealed chamber. Then, methods such as isobaric settling are used to evacuate and pressurize the interior of the chamber, allowing the electrolyte to enter the battery.

[0060] In this application, the upper sealing element is a bell jar 100. The bell jar 100 is movably positioned above the lower bell jar plate 300 via a lifting assembly or similar structure. The bell jar 100 can move towards and abut against the lower bell jar plate 300, forming a sealed compartment. It is understood that the bell jar 100 and the lower bell jar plate 300 are separable. The bell jar 100 can move towards the lower bell jar plate 300 (downward) and press against it, achieving a connection with the lower bell jar plate 300; conversely, the bell jar 100 can move away from the lower bell jar plate 300 (upward) and separate from it.

[0061] Specifically, please refer to Figure 1 and Figure 2 As an optional technical solution of this application, the outer wall 10 of the bell jar 100 near the lower plate 300 of the bell jar is provided with a plurality of mutually spaced protrusions 20. The circumferential spacing of the protrusions 20 on the outer wall 10 may be consistent, inconsistent, or partially consistent. The shape of the protrusions 20 may be a cylinder, cuboid, cone, or other shape, and is not limited herein. In some embodiments, the protrusions 20 and the bell jar 100 are an integral structure, that is, the protrusions 20 and the bell jar 100 are a single integral structure, which can improve the bonding strength between the protrusions 20 and the bell jar 100, prevent the protrusions 20 from separating from the bell jar 100 during the operation of the liquid injection device 1000, thereby ensuring the stability and reliability of the operation of the liquid injection device 1000. In other embodiments, the protrusions 20 and the bell jar 100 are separate structures, that is, the protrusions 20 and the bell jar 100 are two different structures. In one example, the protrusion 20 and the bell jar 100 can be joined together by a detachable connection, including but not limited to snap-fit ​​connections or threaded connections. In another example, the protrusion 20 and the bell jar 100 can be joined together by a non-detachable connection, including but not limited to adhesive bonding or welding.

[0062] Please see Figures 2 to 5 The bell-shaped lower plate 300 provided in this application includes a sealing ring 30 and a flange assembly 50. The sealing ring 30 is installed on the flange assembly 50. In this application, the lower element to be sealed is the flange assembly 50.

[0063] Please see Figures 6 to 9 The sealing ring 30 provided in this application includes an annular body portion 31 and an annular covering portion 33. The body portion 31 includes an inner side 311 and an outer side 313 facing away from each other, and a first end 315 and a second end 317 facing each other. The covering portion 33 is disposed at the first end 315 of the body portion 31. The covering portion 33 protrudes from the inner side 311 of the body portion 31 to form a first eave 331, and the covering portion 33 protrudes from the outer side 313 of the body portion 31 to form a second eave 333. At least one of the first eave 331 and the second eave 333 has a groove 332 near the first end face 335 of the body portion 31.

[0064] Specifically, the body portion 31 of the sealing ring 30 is the part of the sealing ring 30 embedded within the flange assembly 50, and the cover portion 33 is the part of the sealing ring 30 exposed outside the flange assembly 50. In some embodiments, the body portion 31 and the cover portion 33 are an integral structure, that is, the body portion 31 and the cover portion 33 are a single unit, thereby improving the bonding strength between the body portion 31 and the cover portion 33 and preventing separation of the body portion 31 and the cover portion 33 during the operation of the sealing ring 30, thus ensuring the stability and reliability of the sealing ring 30. In other embodiments, the body portion 31 and the cover portion 33 are separate structures, that is, the body portion 31 and the cover portion 33 are two different structures. In this application, the body portion 31 and the cover portion 33 are an integrally formed structure. It is understood that the sealing ring 30 is made of a material with a certain degree of elasticity, such as silicone, polyurethane, or rubber, and is not limited in this application.

[0065] The inner side 311 of the body portion 31 is the side closer to the axis X of the sealing ring 30, and the outer side 313 of the body portion 31 is the side farther away from the axis X of the sealing ring 30. The first end 315 of the body portion 31 is the top end of the body portion 31, and the second end 317 of the body portion 31 is the bottom end of the body portion 31. The first end 315 of the body portion 31 is closer to the bell jar 100 than the second end 317 of the body portion 31.

[0066] The first eave 331 is a structure formed by the covering portion 33 protruding from the inner side 311 of the body portion 31 towards the axis X close to the sealing ring 30. The second eave 333 is a structure formed by the covering portion 33 protruding from the outer side 313 of the body portion 31 towards the axis X away from the sealing ring 30. The groove 332 is a spatial structure recessed from the body portion 31 towards the covering portion 33. The groove 332 may be provided only on the first eave 331, only on the second eave 333, or both the first and second eaves 331 may have grooves 332. The cross-section of the groove 332 obtained by a plane perpendicular to the axis X of the sealing ring 30 may be quadrilateral, cylindrical, triangular, or arc-shaped, etc., and is not limited here.

[0067] In traditional designs, a gap exists between the dovetail structure of the sealing ring and the lower component to be sealed (e.g., flange assembly 50). Electrolyte crystals can easily enter and crystallize in this gap. During the assembly of the upper component to be sealed (e.g., bell jar 100) and the lower plate 300 of the bell jar, the sealing ring should ideally be squeezed by the upper component to expel the air from the gap, achieving a tight seal with the lower component and thus an airtight effect. However, the crystallization of electrolyte in the gap hinders the seal between the sealing ring and the lower component, resulting in a persistent gap and poor airtightness.

[0068] In the above technical solution, during the engagement of the bell jar 100 and the lower plate 300, the sealing ring 30 of this application is compressed by the bell jar 100 and / or the flange assembly 50. The two sides of the groove 332 deform outwards, the gas inside the groove 332 is squeezed out, and the compressed covering part 33 fills the groove 332 until the bottom surface 3320 of the groove 332 is tightly fitted with the flange assembly 50, thus forming a good seal. Furthermore, if there are small foreign objects in the groove 332, the pressure will expel these foreign objects together, and the bottom surface 3320 of the groove 332 will be tightly fitted with the flange assembly 50, also forming a good seal. If the foreign objects are large, the groove 332 can accommodate them. In this case, the first end face 335 of the first eaves 331 and the first end face 335 of the second eaves 333 can remain tightly fitted with the flange assembly 50, still forming a good seal.

[0069] Please see Figure 6 and Figure 9 As an optional technical solution of this application, the groove 332 is cut by a plane perpendicular to the axis X of the sealing ring 30, and the bottom surface 3320 of the groove 332 is arc-shaped.

[0070] Specifically, the bottom surface 3320 of the groove 332 is arc-shaped, and the curvature of the arc is not limited in this application. Furthermore, the shape of the bottom surface 3320 of the groove 332 can be semi-circular.

[0071] In the above technical solution, the arc shape has no sharp corners, which ensures that the two sides of the groove 332 deform outward. When the gas in the groove 332 is squeezed out, the bottom surface 3320 of the groove 332 completely fits the upper surface of the lower part to be sealed (the upper surface 531 of the mounting plate 53 of the flange assembly 50 described below), making it difficult for gas to remain. In addition, the arc-shaped bottom surface 3320 can also distribute the force more evenly when the sealing ring 30 is subjected to compressive force, so that the bottom surface 3320 of the groove 332 fits evenly and completely with the upper surface 531 of the mounting plate 53.

[0072] Furthermore, when the bottom surface 3320 of the groove 332 is semi-circular, the groove 332 can provide a larger accommodating space, thereby accommodating larger foreign objects. At the same time, the bottom surface 3320 of the groove 332 can also maintain a tight fit with the upper surface 531 of the mounting plate 53, ensuring the sealing performance of the sealing ring 30.

[0073] Please see Figures 6 to 9 As an optional technical solution of this application, when both the first end face 335 of the first eaves 331 and the second eaves 333 are provided with grooves 332, the two grooves 332 are symmetrically arranged about the body part 31.

[0074] Specifically, the groove 332 provided on the first eaves 331 is the first groove 3321, and the groove 332 provided on the second eaves 333 is the second groove 3323.

[0075] In the above technical solution, the first groove 3321 and the second groove 3323 are symmetrically arranged about the body part 31, which can make the first eaves 331 and the second eaves 333 evenly stressed during the process of the bell jar 100 pressing down the sealing ring 30, ensuring that the bottom surface 3320 of the first groove 3321 and the second groove 3323 can fit perfectly with the upper surface 531 of the mounting plate 53 to form good airtightness.

[0076] Please continue reading. Figures 6 to 9 As an optional technical solution of this application, the capacity of the two grooves 332 and the shape of the bottom surface 3320 of the two grooves 332 are the same.

[0077] Specifically, the capacity of groove 332 is the volume of groove 332 when it is not deformed. The first groove 3321 and the second groove 3323 have the same capacity, and the shape of the bottom surface 3320 of the first groove 3321 is the same as the shape of the bottom surface 3320 of the second groove 3323, meaning that the geometry of the first groove 3321 and the second groove 3323 is completely identical.

[0078] In the above technical solution, the first groove 3321 and the second groove 3323 have the same capacity, and the bottom surface 3320 of the first groove 3321 and the second groove 3323 also have the same shape. This ensures that the first groove 3321 and the second groove 3323 have the same deformation response to the extrusion force during the process of the sealing ring 30 being subjected to extrusion force, thus ensuring that the sealing ring 30 is subjected to uniform force. This, in turn, ensures that the bottom surface 3320 of the first groove 3321 and the second groove 3323 are perfectly fitted with the upper surface 531 of the mounting plate 53 to form good airtightness.

[0079] Please continue reading. Figure 6 and Figure 9As an optional technical solution of this application, the covering part 33 includes a second end face 337 opposite to the first end face 335, and the second end face 337 is arched.

[0080] Specifically, the first end face 335 of the covering portion 33 is the surface close to the main body portion 31, and the second end face 337 of the covering portion 33 is the surface away from the main body portion 31. The second end face 337 is arched, that is, the second end face 337 is a surface that protrudes and curves from the first end face 335 toward the second end face 337.

[0081] In traditional designs, the dovetail structure of the sealing ring has a dovetail groove. Electrolyte crystals easily accumulate in this groove. During the bonding process between the upper sealing element (bell jar 100) and the lower sealing element (flange assembly 50), the sealing ring should ideally be squeezed by the upper sealing element to expel air from the dovetail groove, achieving a tight seal and airtightness. However, the electrolyte crystals in the dovetail groove hinder the bonding between the sealing ring and the upper sealing element, resulting in a persistent gap and poor airtightness.

[0082] In the above technical solution, on the one hand, the second end face 337 is arched, that is, the second end face 337 has a certain upward convex arc. Compared with the second end face being flat or having a dovetail groove, the second end face 337 allows electrolyte crystals to slide off from the arched surface, avoiding electrolyte crystals remaining on the second end face 337. This ensures that there is no gap after the sealing ring 30 is pressed against the bell jar 100, improving airtightness. On the other hand, the arched shape of the second end face 337 also avoids the generation of a negative pressure zone when the second end face 337 is pressed against the bell jar 100, which would cause a large suction force between the second end face 337 and the bell jar 100. Consequently, during the process of the bell jar 100 rising and separating from the lower plate 300 of the bell jar, the sealing ring 30 would be pulled out of the limiting groove 533 on the flange assembly 50 and fall off, affecting the sealing effect when the bell jar 100 and the lower plate 300 of the bell jar reassemble.

[0083] Please continue reading. Figures 6 to 9 As an optional technical solution of this application, the second end 317 of the body part 31 is provided with a plurality of mutually spaced openings 3171, which are used to adjust the force inside the body part 31.

[0084] Specifically, in this application, the opening 3171 is a blind hole, penetrating the second end 317 of the body portion 31 but not the first end 315. The number of openings 3171 in this application is not limited; it can be two, six, or other numbers. The spacing between multiple openings 3171 around the body portion 31 can be the same, different, or partially the same. The opening 3171 can be compressed and expanded, thereby adjusting the internal force of the body portion 31. For example, when the opening 3171 is compressed and expanded, the sidewall 31711 of the opening 3171 is stretched open, and the inner side 311 and outer side 313 of the body portion 31 can fit more tightly against the limiting groove 533.

[0085] In the above technical solution, the second end 317 of the main body 31 is provided with a plurality of mutually spaced openings 3171. When the openings 3171 are squeezed and expanded, the sidewalls 31711 of the openings 3171 are stretched open, so that the inner side 311 and the outer side 313 of the main body 31 can fit more tightly against the limiting groove 533, thereby increasing the contact area between the main body 31 and the sidewalls 5331 of the limiting groove 533. Figure 4 The friction between the bell 100 and the lower plate 300 prevents the bell 100 from rising and separating from the lower plate 300. During this process, the sealing ring 30 is pulled out of the limiting groove 533 on the flange assembly 50 by the bell 100 and falls off, affecting the sealing effect between the bell 100 and the lower plate 300 and the bell 100 and the flange assembly 50.

[0086] Please continue reading. Figures 6 to 9 As an optional technical solution of this application, the sealing ring 30 may also include a mating part 35, which is disposed in the opening 3171 and is used to press the side wall 31711 of the opening 3171.

[0087] Specifically, the mating part 35 is a structure used to expand the opening 3171. The mating part 35 can be made of a rigid material, such as plastics like PP, ABS, or PBT, and is not limited in this application. The number of mating parts 35 can be one or more. It is understood that in some embodiments, the number of mating parts 35 is consistent with the number of openings 3171. In the direction perpendicular to the circumference of the body part 31, the size of the mating part 35 is slightly larger than the size of the opening 3171. Therefore, after the mating part 35 is installed into the opening 3171, the mating part 35 can form an interference fit with the opening 3171, thereby compressing the sidewall 31711 of the opening 3171.

[0088] In the above technical solution, the sidewall 31711 of the opening 3171 is expanded by the fitting part 35, and the sidewall 31711 of the opening 3171 is stretched open by the fitting part, so that the inner side 311 and the outer side 313 of the body part 31 can fit more tightly against the sidewall 5331 of the limiting groove 533. Figure 4As shown, this increases the friction between the main body 31 and the side wall 5331 of the limiting groove 533, preventing the sealing ring 30 from being pulled out of the limiting groove 533 on the flange assembly 50 and falling off during the process of the bell 100 rising and separating from the lower plate 300 of the bell 100, thus affecting the sealing effect between the bell 100 and the flange assembly 50 when the bell 100 and the lower plate 300 re-join.

[0089] Furthermore, the mating part 35 can be a plastic ball. The diameter of the plastic ball is slightly larger than the dimension of the opening 3171 in the direction perpendicular to the circumference of the body part 31. The plastic mating part 35 does not react with the electrolyte, and at the same time, the spherical mating part 35 has a small contact area with the opening 3171, making it easy to extrude and replace.

[0090] Please see Figure 4 and Figure 6 As an optional technical solution of this application, there are multiple openings 3171, and adjacent openings 3171 are evenly distributed in the circumferential direction of the body part 31.

[0091] In the above technical solution, adjacent openings 3171 are evenly distributed in the circumferential direction of the body part 31, that is, the circumferential spacing of adjacent openings 3171 on the body part 31 is the same, which can evenly apply extrusion force in the circumferential direction of the body part 31, so that all parts of the body part 31 can fit more tightly against the side wall 5331 of the limiting groove 533. This prevents the sealing ring 30 from being pulled out of the limiting groove 533 on the flange assembly 50 and falling off during the process of the bell cover 100 rising and separating from the lower plate 300 of the bell cover, which would affect the sealing effect between the bell cover 100 and the flange assembly 50 when the bell cover 100 and the lower plate 300 of the bell cover re-join.

[0092] Please see Figure 4 and Figure 9 As an optional technical solution of this application, on the axis X of the sealing ring 30, the depth L1 of the opening 3171 is less than or equal to half the length L2 of the body part 31.

[0093] Specifically, the depth L1 of the opening 3171 can be 1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 6, 1 / 7, 1 / 8, 1 / 9, 2 / 9, or 1 / 10 of the length L2 of the body portion 31. When the depth L1 of the opening 3171 is greater than half the length L2 of the body portion 31, it will cause the inner side 311 and the outer side 313 of the body portion 31 to approach each other and recess into the opening 3171 after the bell jar 100 presses down on the sealing ring 30. This will prevent the inner side 311 and the outer side 313 of the body portion 31 from tightly fitting the limiting groove 533, thus damaging the sealing effect of the sealing ring 30.

[0094] In the above technical solution, the depth L1 of the opening 3171 is less than or equal to half the length L2 of the body part 31. After the bell jar 100 presses down on the sealing ring 30, the inner side 311 and the outer side 313 of the body part 31 still remain tightly attached to the limiting groove 533 and will not sink into the opening 3171, thus ensuring the sealing effect of the sealing ring 30.

[0095] Please continue reading. Figure 4 and Figure 9 As an optional technical solution of this application, in the direction perpendicular to the axis X of the sealing ring 30, the ratio of the size W1 of the opening 3171 to the size W2 of the body part 31 is in the range of [1 / 3, 2 / 3].

[0096] Specifically, the ratio of the size W1 of the opening 3171 to the size W2 of the body 31 can be 1 / 3, 1 / 2, 2 / 5, 3 / 7, 4 / 9, 5 / 11, 6 / 13, 7 / 15, 8 / 17, or 2 / 3, as well as other ratios that satisfy the range of [1 / 3, 2 / 3]. When the ratio of the size W1 of the opening 3171 to the size W2 of the body part 31 is less than 1 / 3, the size W1 of the opening 3171 is too small relative to the size W2 of the body part 31. As a result, the distance between the side wall 31711 of the opening 3171 and the inner side 311 and outer side 313 of the body part 31 is too large, that is, the thickness of the side wall 31711 of the opening 3171 is too large. This results in the deformation of the opening 3171 being too small after the mating part 35 squeezes the side wall 31711 of the opening 3171. The squeezing force of the mating part 35 on the side wall 31711 of the opening 3171 cannot be transmitted to the inner side 311 and outer side 313 of the body part 31, and thus the squeezing force between the body part 31 and the side wall 5331 of the limiting groove 533 cannot be increased. When the ratio of the size W1 of the opening 3171 to the size W2 of the body part 31 is greater than 2 / 3, the thickness of the side wall 31711 of the opening 3171 is too small, which makes the body part 31 unable to support the sealing ring 30. This can easily cause the sealing ring 30 to collapse from the covering part 33 to the body part 31, resulting in the inner side 311 and the outer side 313 of the body part 31 failing to fit the side wall 5331 of the limiting groove 533, resulting in poor sealing effect.

[0097] In the above technical solution, the ratio of the size W1 of the opening 3171 to the size W2 of the body part 31 is in the range of [1 / 3, 2 / 3]. This ensures that the thickness of the side wall 31711 of the opening 3171 is appropriate, that is, it can transmit the extrusion force of the mating part 35 on the side wall 31711 of the opening 3171 to the body part 31, increase the extrusion force between the body part 31 and the side wall 5331 of the limiting groove 533, and also support the sealing ring 30 on the axis X of the sealing ring 30.

[0098] Please refer to the following: Figures 3 to 5As an optional technical solution of this application, the flange assembly 50 includes a flange 51 and a mounting plate 53 installed on the flange 51. The upper surface 531 of the mounting plate 53 is provided with an annular limiting groove 533. The body part 31 of the sealing ring 30 is accommodated in the limiting groove 533. The covering part 33 of the sealing ring 30 is located outside the limiting groove 533 and fits against the upper surface 531 of the mounting plate 53.

[0099] Specifically, the mounting plate 53 is located on the side of the flange 51 near the bell jar 100. In one example, the mounting plate 53 and the flange 51 can be joined together by a detachable connection, including but not limited to snap-fit ​​connections or threaded connections. In another example, the mounting plate 53 and the flange 51 can be joined together by a non-detachable connection, including but not limited to bonding or welding.

[0100] In the above technical solution, the main body 31 of the sealing ring 30 is disposed in the limiting groove 533. When the bell jar 100 presses down on the lower plate 300 of the bell jar, the main body 31 can be tightly filled in the limiting groove 533. The covering part 33 is located outside the limiting groove 533. When the bell jar 100 presses down on the lower plate 300 of the bell jar, the covering part 33 fits between the bell jar 100 and the mounting plate 53, thereby achieving a good seal between the sealing ring 30 and the lower plate 300 of the bell jar 100.

[0101] Please continue to refer to this as well. Figures 3 to 5 As an optional technical solution of this application, the flange 51 includes a bottom 511, a side portion 513, and a plurality of flange portions 515. The side portion 513 extends from the periphery of the bottom 511. The plurality of flange portions 515 protrude from the side portion 513 toward the central axis X of the flange 51, and the plurality of flange portions 515 are spaced apart around the central axis X of the flange 51. The bottom 511, the side portion 513, and the flange portions 515 form a receiving cavity 517, in which the mounting plate 53 is accommodated. In the axial direction X of the flange 51, the gap 5151 between the plurality of flange portions 515 corresponds to the cover portion 33. The gap 5151 corresponds to the protrusion 20 in the direction of the axis X of the lower plate of the bell jar 300. It can be understood that after the bell jar 100 is lowered to fit against the lower plate of the bell jar 300, the protrusion 20 is accommodated in the corresponding gap 5151.

[0102] In the above technical solution, after the bell jar 100 descends to fit against the lower plate 300, there is a gap 5151 between the multiple flange portions 515, and this gap 5151 corresponds to the covering portion 33. When the bell jar 100 and the lower plate 300 are engaged, the protrusion 20 on the bell jar 100 passes through the gap 5151, and the lower end of the bell jar 100 applies pressure to the covering portion 33 of the sealing ring 30 for the first time, pressing the sealing ring 30 tightly between the bell jar 100 and the flange assembly 50 to form a good seal. Furthermore, if the flange assembly 50 rotates, the sealing ring 30 will rotate with the flange assembly 50, and the bell jar 100 will apply pressure to the sealing ring 30 again, making the sealing ring 30 more tightly located between the bell jar 100 and the flange assembly 50, thus improving the sealing effect.

[0103] It should be noted that in this application, the axis X of flange 51, the axis X of sealing ring 30, and the axis X of bell lower plate 300 are coaxial.

[0104] 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 various 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 sealing ring, characterized in that, include: The body part is annular, including an inner side and an outer side facing away from each other, and a first end and a second end facing each other. The second end of the body part is provided with a plurality of mutually spaced openings, which are used to adjust the force inside the body part. An annular covering portion is disposed at the first end of the main body portion. The covering portion protrudes from the inner side of the main body portion to form a first eave, and protrudes from the outer side of the main body portion to form a second eave. At least one of the first eave and the second eave has a groove near the first end face of the main body portion. A fitting component is disposed in the opening and is used to press against the sidewall of the opening.

2. The sealing ring according to claim 1, characterized in that, The groove has an annular cross-section obtained by a plane perpendicular to the axial direction of the sealing ring, and the bottom surface of the groove is arc-shaped.

3. The sealing ring according to claim 1, characterized in that, When both the first and second eaves have grooves on their first end faces: The two grooves are symmetrically arranged about the body portion; and / or, The two grooves have the same capacity and the same bottom surface shape.

4. The sealing ring according to claim 1, characterized in that, The covering portion includes a second end face opposite to the first end face, and the second end face is arched.

5. The sealing ring according to claim 1, characterized in that, There are multiple openings, and adjacent openings are evenly distributed in the circumferential direction of the body.

6. The sealing ring according to claim 1, characterized in that, In the axial direction of the sealing ring, the depth of the opening is less than or equal to half the length of the body portion.

7. The sealing ring according to claim 1, characterized in that, In the direction perpendicular to the axial direction of the sealing ring, the ratio of the size W1 of the opening to the size W2 of the body portion ranges from [1 / 3, 2 / 3].

8. A bell-shaped lower plate, characterized in that, include: Flange assembly; and The sealing ring according to any one of claims 1-7, wherein the sealing ring is installed on the flange assembly.

9. The lower plate of the bell jar according to claim 8, characterized in that, The flange assembly includes: Flanges; and The mounting plate is installed on the flange. The upper surface of the mounting plate is provided with an annular limiting groove. The main body is housed in the limiting groove. The covering part is located outside the limiting groove and is in contact with the upper surface of the mounting plate.

10. The lower plate of the bell jar according to claim 9, characterized in that, The flange includes a bottom, a side, and a plurality of flange portions. The side extends from the periphery of the bottom, and the plurality of flange portions protrude from the side towards the central axis of the flange. The plurality of flange portions are spaced apart from each other around the central axis of the flange. The bottom, the side, and the flange portions form a receiving cavity, and the mounting plate is housed in the receiving cavity. In the direction of the central axis of the flange, the gap between the plurality of flange portions corresponds to the covering portion.

11. A liquid injection device, comprising: Bell jar; and The lower plate of the bell jar according to any one of claims 8-10, wherein the bell jar is movably disposed above the lower plate of the bell jar.

12. The liquid injection device according to claim 11, characterized in that, The outer side wall of the bell jar near the lower plate of the bell jar is provided with a plurality of mutually spaced protrusions, and the plurality of protrusions correspond to the plurality of gaps between the plurality of flange portions on the flange of the flange assembly.

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