Efficient opening and closing device for lithium battery shell

Abstract

The invention relates to the technical field of lithium batteries, in particular to a lithium battery shell efficient opening and closing device which comprises a shell and a rubber ring, an opening is formed in the top of the shell, the rubber ring is embedded in the opening, and a limiting module base, a limiting module and a limiting module cover plate are arranged between the rubber ring and a top cover. According to the invention, the defects caused by a traditional disposable lithium battery full-sealing structure can be avoided, a professional forcible entry tool is not needed, the defects caused by a traditional single-layer rubber pad and other sealing schemes are avoided, the linkage control design of unlocking-lithium supplement-sealing maintenance is integrated, and meanwhile, the high air tightness between the shell and the top cover is maintained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery, in particular to a lithium battery shell efficient opening and closing device. BACKGROUND

[0002] Under the background of rapid development of new energy industry, lithium ion battery has become the core power source due to its high energy density and other advantages, but its cycle life problem is outstanding: with the increase of charge and discharge times, the active lithium is irreversibly consumed due to side reactions such as lithium precipitation and SEI film thickening, resulting in battery capacity attenuation and internal resistance increase, and finally failure and scrap. However, the current commercial lithium battery generally adopts a full-sealing structure from inside to outside, and the cell is packaged inside the shell and connected only through the terminal and external circuit. Although this design ensures safety and chemical stability, it leads to the fact that the battery with reduced cycle life cannot be repaired by supplementing lithium, and can only be scrapped as a whole, causing resource waste and rising use cost.

[0003] In the prior art, the traditional sealing structure is mostly designed for one-time use, and professional disassembly tools are required for opening, which is complicated and easy to damage the cell or cause safety problems such as electrolyte leakage and short circuit. It is difficult to restore the original sealing performance after opening; some openable structures do not consider the particularity of lithium supplementing - lithium supplementing may involve the injection of high-pressure active lithium source, which requires high airtightness between the shell and the top cover, while the traditional single-layer rubber pad sealing scheme is easy to age and fail after multiple disassembly and assembly. In addition, the existing opening mechanism lacks collaborative design with the lithium supplementing process, and does not integrate the linkage control design of "unlocking - lithium supplementing - sealing maintenance", which is complicated to operate and difficult to ensure the position accuracy after opening. Therefore, the existing battery shell technology cannot meet the demand of lithium supplementing for the cell with reduced cycle life.

[0004] In summary, in view of the demand for repairing the cell by supplementing lithium after the cycle life is reduced, a new type of battery shell structure is needed: maintaining high sealing reliability during normal use, quickly opening and providing a safe lithium supplementing channel for the cell after the life is reduced, and repeatedly sealing after opening.

[0005] Therefore, it is necessary to invent a lithium battery shell efficient opening and closing device to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a lithium battery shell efficient opening and closing device, which avoids the problems caused by the traditional one-time lithium battery full-sealing structure, does not require professional disassembly tools, avoids the defects caused by the traditional single-layer rubber pad sealing scheme, integrates the linkage control design of "unlocking - lifting (while supplementing lithium) - sealing maintenance", and maintains high airtightness between the shell and the top cover.

[0007] In order to achieve the above object, the present application provides the following technical scheme: comprising a shell and a rubber ring, the top of the shell is provided with an opening, the opening accommodates the rubber ring, a limiting module base, a limiting module and a limiting module cover plate are arranged between the rubber ring and the top cover, the limiting module comprises an elastic component, a columnar body and a pole; the elastic component is arranged between the pole and the columnar body; The bottom end of the limiting module base is provided with a through hole, the edge of the through hole is provided with a gasket groove, the elastic component and the button are arranged on both sides of the limiting module base; the pole is arranged in the middle of the limiting module base; the pole interferes with the buttons on both sides; the top of the top cover and both sides are provided with a through hole, and the inside of the top cover is provided with an annular groove; the diameter of the bottom of the rubber ring is greater than the width of the limiting module base.

[0008] Preferably, the limiting module is arranged between the limiting module base and the limiting module cover plate; the width of the limiting module is equal to the width of the internal groove of the top cover.

[0009] Preferably, the limiting module base, the limiting module and the limiting module cover plate are connected through bolts.

[0010] Preferably, the bottom of the pole is embedded with the top end of the elastic component, and the bottom of the elastic component is in contact with the upper surface of the bottom of the limiting module base.

[0011] Preferably, the columnar body with a limiting part is arranged in the through hole on both sides of the top cover.

[0012] Preferably, the diameter of the through hole on both sides of the top cover is the same as the diameter of the button.

[0013] Preferably, the diameter of the opening at the top end of the shell gradually decreases from large to small.

[0014] Preferably, the bottom of the limiting module base is provided with a disc, and the diameter of the disc is equal to the inner diameter of the bottom end of the shell.

[0015] In the above technical scheme, the present application provides the following technical effects and advantages: The elastic component, the columnar body (the pole) and the button are integrated to form an integrated reversible opening and closing mechanism: in normal state, the elastic component pushes to keep locking, the pole moves downward and the interlocking state is released by pressing the buttons on both sides, then the columnar body is lifted to drive the limiting module and the base to move linearly along the guide path formed by the through hole and the internal annular groove of the top cover, so that the opening edge enters the recess of the top cover and is continuously pressed, and the rubber ring maintains high airtightness and high sealing property in the up and down clamping and elastic deformation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0017] Figure 1 It is an exploded perspective view of the present application embodiment 1; Figure 2 It is an enlarged view of A in the present application Figure 1 Figure 3 It is a rubber ring perspective view of the present application embodiment 1; Figure 4 It is a rubber ring side sectional view of the present application embodiment 1; Figure 5 It is a limit module cover plate perspective view of the present application embodiment 1; Figure 6 It is a limit module base perspective view of the present application embodiment 1; Figure 7 It is a limit module base and limit module cover plate assembled structure schematic view of the present application embodiment 1; Figure 8 It is a top cover perspective view of the present application embodiment 1; Figure 9 It is a top cover side sectional view of the present application embodiment 1; Figure 10 It is a limit module perspective view of the present application embodiment 1; Figure 11 It is an exploded perspective view of the present application embodiment 2; Figure 12 It is a whole lifting frame un-lifted sectional view of the present application embodiment 2; Figure 13 It is a whole lifting frame lifted sectional view of the present application embodiment 2; Explanation of reference signs: 100, shell; 200, rubber ring; 300, opening; 400, top cover; 501, limit module base; 502, limit module; 503, limit module cover plate; 511, disc; 512, elastic component; 522, columnar body; 532, pole; 600, through hole; 700, gasket groove; 800, perforation; 900, groove; 901, button; 1001, whole shell; 1002, whole lifting frame; 1003, middle locking seat; 1004, deformation bottom glue; 1005, bolt; 1006, fixing hole; 1016, first fixing hole; 1026, second fixing hole; 1036, third fixing hole; 1007, bottom plate; 1008, spring. DETAILED DESCRIPTION​

[0018] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0019] Embodiment 1: The present application provides a high-efficiency opening and closing device for a lithium battery shell as shown in the drawings, which comprises a shell 100 and a rubber ring 200. Figures 1-10 The shell 100 is provided with an opening 300 at the top, which accommodates the rubber ring 200 to be embedded, and the shell 100 bears and encloses the battery cell and electrolyte, and the opening 300 at the top is used for maintenance and lithium supplement.

[0020] The rubber ring 200 serves as a sealing element and produces elastic deformation under pressure to achieve air tightness between the shell 100 and the top cover 400; the rubber ring 200, the top cover 400 and the limiting module base 501 are respectively bonded by adhesive to form a double sealing surface.

[0021] The limiting module base 501, the limiting module 502 and the limiting module cover plate 503 are arranged between the rubber ring 200 and the top cover 400, and the limiting module 502 comprises an elastic component 512, a columnar body 522 and a pole 532.

[0022] The limiting module base 501 bears and positions the elastic component 512, the columnar body 522 and the pole 532; the edge gasket groove 700 is used to place a sealing gasket to improve the sealing performance of the connecting surface; the elastic component 512 is arranged between the pole 532 and the columnar body 522.

[0023] The limiting module base 501 is provided with a through hole 600 at the bottom end, and the through hole 600 is provided with a gasket groove 700 at the edge; the gasket groove 700 is located at the edge of the limiting module base 501, and the gasket groove 700 can be selectively assembled with a sealing gasket to enhance the static sealing of the connecting surface with the shell 100.

[0024] The limiting module base 501 is provided with an elastic component 512 and a button 901 on both sides; the limiting module base 501 is provided with a pole 532 in the middle; the top cover 400 is provided with a through hole 800 at the top and on both sides, and the inside of the top cover 400 is provided with an annular groove 900; the top cover 400 serves as the outermost cover; the through hole 600 is used to arrange the pole 532 (i.e., the through hole 600 is penetrated by the pole 532), thereby realizing that the pole 532 interferes with the two buttons 901; the through holes 600 on both sides are used for the buttons 901 to pass out; the annular groove 900 / arc-shaped groove 900 is arranged inside to accommodate the relative movement and guide of the rubber ring 200 and the limiting module base 501.

[0025] The annular groove 900 functions as follows: the groove 900 cooperates with the outer edge of the limiting module base 501 to serve as a guide rail, and the groove 900 provides space for the deformation and axial displacement of the rubber ring 200, thereby avoiding the jamming of the rubber ring 200 during operation.

[0026] The bottom diameter of the rubber ring 200 is greater than the width of the limiting module base 501. The rubber ring 200 is embedded in the opening 300 of the shell 100, and the top of the rubber ring 200 is embedded in the groove 900 at the lower part of the top cover 400 and is bonded by adhesive. In the closed state, the upper and lower ends of the rubber ring 200 are clamped and pressed by the opening 300 of the shell 100 and the disc 511 below the limiting module base 501, respectively, forming double-seal.

[0027] The limiting module 502 is composed of an elastic component 512, a cylindrical body 522, and a pole 532. Through the interlocking logic of "downward displacement of the pole 532 → unlocking of the button 901 → pressable", the opening stroke and safety sequence are controlled. The elastic component 512 normally pushes the button 901 out to the locked position; after the lithium supplement is completed (i.e., in the pressed state), the elastic component 512 automatically resets the limiting module 502 and relocks it.

[0028] When the limiting module 502 drives the disc 511 below the limiting module base 501 to move upward, the bottom of the rubber ring 200 follows, the rubber ring 200 moves relative to the top cover 400 and deforms, causing the edge of the opening 300 to enter the groove 900 of the top cover 400 and be continuously pressed and sealed, so that good sealing performance can be maintained during opening or closing. This "unlocking first, then lifting, and then deforming and sealing" path takes into account both the sealing reliability and the durability of repeated opening and closing.

[0029] The limiting module cover plate 503 functions as follows: it axially limits and guides the limiting module 502, and provides a guide hole for the button 901.

[0030] The perforations 800 at the top of the top cover 400 are used for the pole 532 to pass through, and the perforations 800 on both sides of the top cover 400 are used for the button 901 to pass through.

[0031] The limiting module 502 is arranged between the limiting module base 501 and the limiting module cover plate 503; the limiting module 502 is the core functional component that realizes the opening and closing control function of the battery shell 100.

[0032] The limiting module base 501 and the limiting module cover plate 503: they clamp and fix the limiting module 502, providing a stable installation space for the limiting module 502 and ensuring the position of the limiting module 502 in the device.

[0033] The width of the limiting module 502 is equal to the inner diameter width of the annular groove 900 in the top cover 400 (i.e., the distance between the grooves 900), which realizes the clearance fit of the limiting module 502 and the top cover 400. This design enables the limiting module 502 to be precisely fitted in the groove 900 in the top cover 400. When the limiting module 502 moves inside the top cover 400, it can move smoothly along the groove 900, ensuring the linearity and accuracy of the movement, avoiding the shaking and deviation of the limiting module 502 during the movement, and thus ensuring the stability and reliability of the entire opening and closing device.

[0034] The limiting module 502 is attached between the limiting module base 501 and the limiting module cover 503. This attachment mode stably limits the limiting module 502 between the two, enhancing the overall structure and stability. It enables the limiting module 502, the limiting module base 501, and the limiting module cover 503 to form a relatively independent component, facilitating the overall installation, disassembly, and maintenance, and avoiding the full-sealing structure of traditional lithium batteries. At the same time, this connection mode also helps to effectively transmit and distribute the force between the components.

[0035] The limiting module base 501, the limiting module 502, and the limiting module cover 503 are connected by bolts. The connection of the limiting module base 501, the limiting module 502, and the limiting module cover 503 by bolts can provide sufficient connection strength, ensuring that these three components will not loosen or separate during the use of the battery case 100. Even when the battery case 100 is subjected to external forces such as vibration and impact, the connection remains stable, ensuring the normal operation of the entire opening and closing device.

[0036] The bottom of the pole 532 is embedded with the top of the elastic component 512, and the bottom of the elastic component 512 is in contact with the upper surface of the bottom of the limiting module base 501. This structure design enables the elastic component 512 to exert an upward elastic force on the pole 532, and the elastic component 512 plays a buffering and supporting role between the pole 532 and the limiting module base 501.

[0037] The pole 532 is an important operating component for controlling the opening and closing of the device. The pole 532 not only serves as the operating force point of the button 901 and other components, but also is associated with the control logic of the entire opening and closing.

[0038] The elastic component 512 is an elastic element that has the function of storing and releasing energy. In this device, the elastic component 512 is mainly used to provide elastic force and realize the reset function.

[0039] The connection relationship between the pole column 532 and the elastic component 512 is the key to realize the interlocking design that the two side buttons 901 can be pressed inwards only after the pole column 532 is displaced downwards. When the pole column 532 is in the initial position, the elastic component 512 is in a natural or pre-compressed state, and an upward force is applied to the pole column 532, so that the button 901 is in a locked state and cannot be pressed. Only when the pole column 532 is displaced downwards, the elastic component 512 is further compressed, changing the relative position relationship between the pole column 532 and the button 901, so that the button 901 can be pressed, realizing the sequential control of operation and the interlocking function.

[0040] After completing the opening operation, the elastic force of the elastic component 512 can restore the pole column 532 and the button 901 and other components to the initial closed position. When the external force disappears, the elastic component 512 releases the stored energy and pushes the pole column 532 upwards, driving the entire limiting module 502 back to the closed state, ensuring that the device can automatically recover to the normal working state, that is, the reset function is realized.

[0041] The top cover 400 is provided with a limiting columnar body 522 in the two side perforations 800, which provides a space for the installation and movement of the button 901 and other components, and is an important channel for the linear movement of the button 901 in the device. The top cover 400, the base and the cover plate are all made of polytetrafluoroethylene material, which is strong and wear-resistant, and can also isolate the positive and negative poles.

[0042] The limiting columnar body 522: It can usually be a column with a shoulder, boss or other limiting structure, which can provide guiding and limiting functions for the button 901 and other components.

[0043] The limiting columnar body 522 is installed in the two side perforations 800 of the top cover 400, providing precise linear motion guidance for the button 901 and other components. When the button 901 is pressed or reset, the columnar body 522 can ensure that the button 901 moves along the predetermined linear trajectory, avoiding the offset or shaking of the button 901 during movement, so that the limiting columnar body 522 ensures that the button 901 can accurately trigger the corresponding operation, improving the accuracy and reliability of the device operation.

[0044] The limiting structure on the columnar body 522 can limit the movement stroke of the button 901. When the button 901 moves to the maximum stroke, the limiting structure of the columnar body 522 can prevent the button 901 from continuing to move, preventing the button 901 from over-movement and causing component damage or device failure. At the same time, the limiting structure can also ensure that the button 901 is in the correct state at the initial position, providing protection for the normal operation of the device.

[0045] The cylindrical body 522 with a limiting part is installed in the holes 800 on both sides of the top cover 400, which increases the overall structural strength and stability of the top cover 400. It can share the force generated by the button 901 and other components during movement, reduce the possibility of deformation of the top cover 400 when subjected to force, and ensure the structural integrity of the top cover 400 and the entire device.

[0046] The diameter of the holes 800 on both sides of the top cover 400 is the same as the diameter of the button 901, which is a direct component for operating the opening and closing of the device. The user controls the components such as the pole 532 by pressing the button 901, thereby controlling the opening and closing of the battery shell 100. The diameter of the holes 800 on both sides of the top cover 400 is the same as the diameter of the button 901, which can provide accurate guidance and positioning for the button 901. When the button 901 moves in the hole 800, it can tightly fit with the inner wall of the hole 800, ensuring that the button 901 moves in a straight line, avoiding shaking or deviation of the button 901 during movement, thereby ensuring that the button 901 can accurately trigger the corresponding operation, improving the accuracy and reliability of the device operation.

[0047] The diameter of the opening 300 at the top of the shell 100 gradually decreases from large to small (i.e., the diameter of the top of the opening 300 is the smallest), and in the closed state, the opening 300 with a large diameter gradually decreases better cooperates with the sealing components such as the rubber ring 200. The large end of the opening 300 can more easily make the rubber ring 200 enter and fit, while the small end can produce a greater extrusion effect on the rubber ring 200, allowing the rubber ring 200 to fit more tightly between the edge of the opening 300 and the top cover 400, thereby improving the sealing effect, preventing the leakage of electrolyte inside the battery and the entry of dust, moisture and other external factors into the battery interior, and ensuring the safety and performance of the battery.

[0048] The bottom of the limiting module base 501 is provided with a disc 511, and the diameter of the disc 511 is equal to the inner diameter of the bottom end of the shell 100 (i.e., the smallest inner diameter of the shell 100). When the top cover 400 remains fixed, if the pole 532 is pulled upward, the pole 532 will first move to the upper limit position; then, the pole 532 begins to pull the entire limiting module 502 upward along the groove 900 inside the top cover 400, and the disc 511 below the limiting module base 501 connected thereto also moves upward synchronously. Since the top of the rubber ring 200 is pre-buried in the groove 900 below the top cover 400 (or below the cover plate), during the upward movement of the disc 511, the disc 511 will drive the bottom of the rubber ring 200 to move upward together - and at this time the top cover 400 is fixed in position, the bottom of the rubber ring 200 and the top cover 400 form a relative movement. This relative movement causes the rubber ring 200 to elastically deform.

[0049] When the limiting module 502 moves to the innermost position of the top cover 400, the disc 511 below it will exert an upward pulling force on the shell 100, so that the top of the shell 100 is lifted and clamped into the top position of the rubber ring 200. At this time, the top of the shell 100 and the top of the rubber ring 200 are jointly embedded in the groove 900 inside the top cover 400. At the same time, the elastic device 512 inside the limiting module 502 will make the button 901 pop out, and the button 901 is clamped into the through hole 600 on both sides of the top cover 400, thereby forming a locked state. Although the disc 511 below the limiting module base 501 has a tendency to return to its original position due to the pulling force, the button 901 has been firmly clamped into the through hole 600 on both sides of the top cover 400, effectively preventing the disc 511 from bouncing back. In this state, the rubber ring 200 is continuously squeezed in the middle position, thereby ensuring the sealing effect of the entire device, that is, ensuring that the shell 100 and the top cover 400 maintain high airtightness.

[0050] After the pole piece is completed and formed, the core tab is connected with the bottom of the disc 511. The bottom of the disc 511 can be connected with the tab in various ways: it can be connected by a reserved through hole 600 to realize bolt connection and other mechanical hard connection, or it can be connected by welding, adhesive and other chemical connection processes; in addition, the bottom of the disc 511 can also not be provided with a through hole 600, and the specific connection form is not limited. After the connection between the tab and the disc 511 is completed, the top cover 400 module and the battery core are assembled into the shell 100, and only the position of the top cover 400 needs to be fixed, and then the final assembly can be completed by lifting the pole 532.

[0051] The elastic component 512 of the embodiment is preferably a spring 1008.

[0052] According to the above assembly method, when the battery charging and discharging cycle reaches a certain number of times, the top cover 400 can be opened for lithium supplementation. The structural design scheme of the embodiment is preferably suitable for the lithium trifluoromethyl sulfinate lithium supplementation method developed by Fudan University.

[0053] Embodiment 2: as Figures 11-13The difference between the present embodiment and embodiment 1 is that the device above the shell 100 is redesigned, and the position scheme of the spring 1008 in the present embodiment is different from that of the elastic component 512 (preferably the spring 1008) in embodiment 1. The present embodiment provides an efficient opening and closing device for a lithium battery shell, which includes a shell 100 and a deformation bottom glue 1004. The shell 100 is provided with an opening 300 at the top, which accommodates the embedding of the deformation bottom glue 1004. The deformation bottom glue 1004 is circular in front view, and is a circular elastic body seal in front view, which is arranged between the opening 300 and the middle locking seat 1003 of the shell 100. The deformation bottom glue 1004 realizes end face sealing through its own elastic compression, and does not lose stability under shear and extrusion deformation during opening and closing. The inner edge of the opening 300 cooperates with the deformation bottom glue 1004 to realize the pre-sealing of the opening 300 surface and the uniform distribution of stress. The deformation bottom glue 1004 is preferably perfluoroether rubber FFKM. The reason for selection is that FFKM almost contains no C-H bond in the molecular chain, is inert to most chemical media, can withstand strong acid, strong base, strong oxidizing agent and various organic solvents (such as ether, ketone, ester, alcohol, amine), and shows excellent stability to 1600+ chemicals. At the same time, it has good resistance to plasma and gas corrosion, is suitable for strong oxidation, strong polarity and oxygen-containing or fluorine-containing systems that may be contacted during battery maintenance, and reduces the risk of swelling, aging and failure.

[0054] Perfluoroether rubber FFKM material can be used in an environment up to 327°C for a long time, and can withstand higher temperature for a short time. Even at 316°C constant temperature or 343°C intermittent high temperature, it can still maintain elasticity without hardening or embrittlement. In the high temperature compression permanent deformation test, the compression deformation rate of perfluoroether rubber FFKM material at 300°C can be controlled below 50%, which is beneficial to the reliable resetting and maintenance of airtightness of the sealing surface after multiple disassembly and high temperature working conditions.

[0055] The effect of using perfluoroether rubber FFKM for the deformation bottom glue 1004 is that it has good resilience after long-term compression, excellent resistance to electrolyte and excellent airtightness.

[0056] The top of the deformation underglue 1004 is embedded in the middle locking seat 1003, the outer surface of the middle locking seat 1003 is wrapped with the overall shell 1001, the middle locking seat 1003 serves as a sealed and locked execution seat body, the middle locking seat 1003 is preferably an aluminum alloy 6000 / 7000 series, because the aluminum alloy 6000 / 7000 series is a heat treatable strengthening alloy, the strength is significantly higher than that of the 5000 / 1000 series; wherein the 7000 series has the highest strength in the group, and is suitable for bearing the structural load caused by locking, lifting and vibration; in the scene where weight reduction is required without excessive sacrifice of strength, the 6000 series provides a more balanced strength-weight ratio. At the same time, the aluminum alloy 6000 / 7000 series body has good thermal conductivity, which helps to quickly diffuse the heat generated during the use of lithium supplement or locally, reduce the risk of heat concentration and seal aging; under the same weight, the aluminum base material is more conducive to heat diffusion and structural lightweighting than steel parts.

[0057] The outer surface of the middle locking seat 1003 cooperates with the overall shell 1001 to form the bearing and positioning boundary of the shell; the middle locking seat 1003 internally has sealing and guiding structures, and cooperates with the deformation underglue 1004 to form a repeatable main sealing channel. The middle locking seat 1003 is covered outside the deformation underglue 1004 and the middle locking seat 1003, constituting an outer protective barrier of the device, and the middle locking seat 1003 provides a linear guide and bearing platform for the overall lifting frame 1002.

[0058] The overall lifting frame 1002 is a key execution component for realizing the opening and closing actions of the device, which penetrates the deformation underglue 1004, the middle locking seat 1003 and the overall shell 1001, and the bottom plate 1007 is arranged at the bottom of the overall lifting frame 1002, and the upper surface of the bottom plate 1007 at the bottom of the overall lifting frame 1002 is attached to the lower surface of the deformation underglue 1004. Through the action of external force, the overall lifting frame 1002 can realize the rising and falling movement, thereby driving the middle locking seat 1003 and the overall shell 1001 to move together, realizing the opening (lifting the middle locking seat 1003 and the overall shell 1001, separating the deformation underglue 1004 from the opening 300 of the shell 100, forming a lithium supplement channel) and closing (lowering the middle locking seat 1003 and the overall shell 1001, attaching the deformation underglue 1004 to the opening 300 of the shell 100, restoring the seal) functions of the device. At the same time, it penetrates other components, ensuring the relative position and movement coordination between components. The spring 1008 is embedded between the overall lifting frame 1002 and the middle locking seat 1003, the spring 1008 serves as an elastic link, absorbs the impact and vibration energy in the opening and closing process, reduces the impact stress and stick-slip wear between the deformation underglue 1004 and the metal middle locking seat 1003, avoids the failure of lip edge rolling and indentation caused by hard contact, prolongs the service life of the sealing and guiding parts, and is especially beneficial to the working conditions requiring multiple opening and closing such as lithium supplement.

[0059] The deformed bottom glue 1004, the intermediate locking seat 1003 and the overall shell 1001 are penetrated by the overall lifting frame 1002, and the overall lifting frame 1002 and the intermediate locking seat 1003 and the overall shell 1001 are fixed by penetrating the fixing hole 1006.

[0060] The fixing hole 1006 includes a first fixing hole 1016, a second fixing hole 1026 and a third fixing hole 1036, the first fixing hole 1016 is penetrated by the overall lifting frame 1002, the second fixing hole 1026 is penetrated by the top of the intermediate locking seat 1003, and the third fixing hole 1036 is penetrated by the overall shell 1001. The above three fixing holes cooperate with each other, and the overall lifting frame 1002, the intermediate locking seat 1003 and the overall shell 1001 are firmly connected together by penetrating the bolt 1005. When the device is opened, the bolt 1005 can bear a certain pulling force, so that the overall lifting frame 1002 can smoothly lift the intermediate locking seat 1003 and the overall shell 1001 to form a lithium supplement channel. The above scheme realizes that the shell 100 and the overall shell 1001 maintain high air tightness.

[0061] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A high-efficiency opening and closing device for lithium battery shell, comprising a shell and a rubber ring, wherein an opening is arranged on the top of the shell, and characterized in that, The opening accommodates the rubber ring, and the rubber ring and the top cover are provided with a limiting module base, a limiting module and a limiting module cover plate, the limiting module comprises an elastic component, a columnar body and a pole; the elastic component is arranged between the pole and the columnar body; The bottom end of the limiting module base is provided with a through hole, the edge of the through hole is provided with a gasket groove, and the limiting module base is provided with an elastic component and a button on each side; the limiting module base is provided with a pole in the middle; the pole interferes with the buttons on both sides; the top of the top cover is provided with a through hole on each side, and the inside of the top cover is provided with an annular groove; the diameter of the bottom of the rubber ring is greater than the width of the limiting module base.

2. The lithium battery case high efficiency opening and closing device according to claim 1, characterized in that, The limiting module is arranged between the limiting module base and the limiting module cover plate; the width of the limiting module is equal to the width of the internal groove of the top cover.

3. The lithium battery case high efficiency opening and closing device according to claim 2, wherein, The limiting module base, the limiting module and the limiting module cover plate are connected through bolts.

4. The high efficiency opening and closing device for lithium battery case according to claim 1, wherein, The bottom of the pole is embedded with the top end of the elastic component, and the bottom of the elastic component is in contact with the upper surface of the bottom of the limiting module base.

5. The lithium battery case high efficiency opening and closing device according to claim 1, wherein, The top cover is provided with a columnar body with a limiting portion in each through hole.

6. The lithium battery case high efficiency opening and closing device according to claim 5, wherein The diameter of the through hole on each side of the top cover is the same as the diameter of the button.

7. The lithium battery case high efficiency opening and closing device according to claim 1, wherein The diameter of the opening at the top end of the shell gradually decreases from large to small.

8. The lithium battery case high efficiency opening and closing device of claim 1, wherein, The bottom of the limiting module base is provided with a disc, and the diameter of the disc is equal to the inner diameter of the bottom end of the shell.

9. A high efficiency opening and closing device for lithium battery housing, comprising a housing and a deformation bottom glue, characterized in that, The top of the shell is provided with an opening, the opening accommodates the deformation bottom rubber, the front projection of the deformation bottom rubber is in the shape of a ring, the deformation bottom rubber is embedded into the middle locking seat, the outer surface of the middle locking seat is wrapped with an overall shell, the deformation bottom rubber, the middle locking seat and the overall shell are penetrated by the overall lifting frame, the bottom of the overall lifting frame is provided with a bottom plate, the upper surface of the bottom plate is in contact with the lower surface of the deformation bottom rubber, a spring is embedded between the overall lifting frame and the middle locking seat, and the overall lifting frame, the middle locking seat and the overall shell are provided with a fixing hole.

10. The lithium battery case high efficiency opening and closing device according to claim 9, wherein, The fixing hole comprises a first fixing hole, a second fixing hole and a third fixing hole, the first fixing hole is provided through the overall lifting frame, the second fixing hole is provided through the top of the middle locking seat, and the third fixing hole is provided through the overall shell.

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