Anti-falling sealing component

Abstract

The utility model discloses an anti-falling sealing component. The sealing component comprises a sealing component body, wherein the sealing component body comprises a columnar nail body and a nail head with a guide inclined plane; the negative pressure fixing piece is arranged around the periphery of the nail body, and the negative pressure side of the negative pressure fixing piece faces the nail head, so that when the nail head is inserted into the hole, the negative pressure fixing piece is in contact with the surface where the hole top is located, and a negative pressure environment is formed between the negative pressure side and the surface where the hole top is located. According to the scheme of the embodiment of the invention, after the sealing part is inserted into the battery liquid injection hole, the negative pressure side of the negative pressure fixing part and the surface of the battery shell where the battery liquid injection hole is located are gradually close to each other, contact and extrude along with the increase of the insertion depth of the nail head, so that a negative pressure environment is formed between the negative pressure side of the negative pressure fixing part and the surface of the battery shell; and the tightness of connection between the sealing part and the battery liquid injection hole is enhanced in a negative pressure fixing manner, so that electrolyte leakage caused by falling of the sealing part is effectively prevented.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of machining. More particularly, the present disclosure relates to a fall-preventing sealing component. BACKGROUND

[0002] Battery injection is a key step in the manufacturing process of lithium ion batteries, and its main purpose is to inject electrolyte into the battery to establish a medium for ion transmission between the positive and negative electrodes of the battery.

[0003] In the existing battery manufacturing process, after the injection is completed, the electrolyte needs to be fully soaked into the pores of the electrode sheet. This process requires the use of a sealing component to block the injection hole of the battery to prevent the electrolyte from evaporating. After using the sealing component to block the injection hole of the battery, the battery needs to be sent to a high-temperature room for high-temperature standing. During the standing process of the battery, due to the increase in the internal gas pressure of the battery under high-temperature environment, the sealing component used in the existing process is prone to being ejected from the injection hole under the action of the gas pressure, resulting in the overflow of the electrolyte from the battery, which damages the performance of the battery, and the overflowed electrolyte also pollutes the environment.

[0004] Therefore, there is an urgent need to provide a fall-preventing sealing component that can improve the tightness of the cooperation between the sealing component and the injection hole, and prevent the sealing component from falling off during the standing process of the battery. SUMMARY

[0005] In order to at least solve one or more of the above-mentioned technical problems, the present disclosure proposes a fall-preventing sealing component in various aspects.

[0006] The present disclosure provides a fall-preventing sealing component, which comprises: a sealing component body, the sealing component body comprising a columnar nail body and a nail head with a guide inclined surface; and a negative pressure fixing member, which is arranged around the outer periphery of the nail body, and the negative pressure side of the negative pressure fixing member faces the nail head, so that when the nail head is inserted into the hole, the negative pressure fixing member is in contact with the hole top surface, and a negative pressure environment is formed between the negative pressure side and the hole top surface.

[0007] In some embodiments, the sealing component further comprises: a buckle; the buckle is arranged on the outer periphery of the nail body, and the outer periphery of the nail body has a structure for cooperating with the buckle to achieve a buckle fixing state; and the buckle is located on the positive pressure side of the negative pressure fixing member to limit the movement of the negative pressure fixing member towards the positive pressure side in the fixing state.

[0008] In some embodiments, the sealing component further comprises: a buffer member; the buffer member is arranged around the outer periphery of the nail body and located between the buckle and the negative pressure fixing member, so as to transmit the force applied by the buckle to the positive pressure side of the negative pressure fixing member, so that the negative pressure fixing member is in contact with the hole top surface, and a negative pressure environment is formed between the negative pressure side and the hole top surface.

[0009] In some embodiments, the negative pressure fixing member is fixedly connected to the outer periphery of the nail body.

[0010] In some embodiments, the negative pressure fixing member includes a suction cup, the concave side of which is the negative pressure side and faces the nail head.

[0011] In some embodiments, the contact surface between the buckle and the nail body is provided with an internal thread, and the outer periphery of the nail body is provided with an external thread that matches the internal thread.

[0012] In some embodiments, the outer periphery of the nail body includes a threaded outer periphery and a smooth outer periphery; the threaded outer periphery is disposed on the side of the nail body away from the nail head, the external thread is disposed on the threaded outer periphery, and the snap fastener is disposed around the threaded outer periphery; the smooth outer periphery is disposed on the side of the nail body close to the nail head, and the negative pressure fastener is disposed around the smooth outer periphery.

[0013] In some embodiments, the buckle includes: a pin; the outer periphery of the pin body has a plurality of pin holes arranged along the axis, so that the buckle is fixed when the pin is inserted into the pin hole.

[0014] In some embodiments, the buffer includes a spring, wherein the inner diameter of the spring is larger than the diameter of the nail body.

[0015] In some embodiments, the radial dimension of the nail head decreases along the insertion direction of the sealing member, which is the direction from the nail body to the nail head.

[0016] In this embodiment, a negative pressure fixing component is added to the outer periphery of the sealing component body, with the negative pressure side of the negative pressure fixing component facing the nail head side of the sealing component body. After the battery is filled with electrolyte, the nail head can be aligned with the battery filling hole and inserted by means of the guide slope of the nail head. As the insertion depth of the nail head increases, the negative pressure side of the negative pressure fixing component gradually approaches, contacts, and is squeezed with the surface of the battery case where the battery filling hole is located, thereby forming a negative pressure environment between the negative pressure side of the negative pressure fixing component and the surface of the battery case. The tightness of the connection between the sealing component and the battery filling hole is strengthened by the negative pressure fixing method, effectively preventing electrolyte leakage caused by the detachment of the sealing component. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 An exemplary structural diagram of a sealing component for preventing detachment according to some embodiments of this disclosure is shown;

[0019] Figure 2An exemplary structural diagram of a sealing component for preventing detachment according to some embodiments of this disclosure is shown;

[0020] Figure 3 An exemplary structural diagram of a sealing component for preventing detachment according to some embodiments of this disclosure is shown;

[0021] Figure 4 An exemplary structural diagram of a snap fastener according to some embodiments of this disclosure is shown;

[0022] Figure 5 An exemplary structural diagram of a sealing component for preventing detachment according to some embodiments of this disclosure is shown;

[0023] Explanation of reference numerals in the attached figures:

[0024] 10 - Sealing component body, 11 - Nail head, 12 - Nail body, 121 - Threaded outer periphery, 122 - Smooth outer periphery, 123 - Pin hole, 20 - Negative pressure fixing component, 30 - Buckle, 31 - Circular collar, 32 - Pin, 40 - Buffer component. Detailed Implementation

[0025] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0028] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0029] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0030] Exemplary application scenarios

[0031] The manufacturing process of lithium-ion batteries includes, in sequence, electrode manufacturing, cell assembly, and formation and packaging. Electrolyte injection is a step in the cell assembly process, which involves injecting electrolyte into the cell. The electrolyte reacts chemically with the electrodes and simultaneously acts as a medium for ion transport.

[0032] In existing battery manufacturing processes, sealing components are crucial for achieving complete isolation between the battery's internal structure and the external environment. The specific process is as follows: After the battery cell is manufactured, it needs to be encapsulated in a battery casing. An electrolyte injection hole is left at the top of the casing. After the electrolyte is injected, a sealing component is inserted into the injection hole to prevent electrolyte evaporation. While waiting for the electrolyte to wet the electrode pores, the battery needs to be placed in a high-temperature chamber for high-temperature settling. Due to the increased internal pressure of the battery under high temperature, the sealing components used in existing processes are prone to popping out of the injection hole under pressure, causing electrolyte to overflow from the battery, damaging its performance. Furthermore, the overflowing electrolyte also pollutes the environment.

[0033] Exemplary application scheme

[0034] In view of this, the present disclosure provides a sealing component that prevents detachment. It is suitable for the battery electrolyte filling process and can enhance the tightness of the fit between the sealing component and the battery electrolyte filling hole through the negative pressure fixing effect of the negative pressure fixing component. This prevents the sealing component from falling off from the battery electrolyte filling hole under high temperature environment, which would cause electrolyte leakage.

[0035] Figure 1 Exemplary structural diagrams of anti-detachment sealing components according to some embodiments of this disclosure are shown, such as... Figure 1As shown, the sealing component includes at least two parts: First, a sealing component body 10, which is cylindrical. One end of the sealing component body 10 is a nail head 11, which is the part of the sealing component body 10 that first contacts the battery filling hole when the sealing component is used to plug it. Furthermore, the nail head 11 has a guide bevel for assisting in aligning the battery filling hole. The portion between the other end of the sealing component body 10 and the nail head 11 is the nail body 12. Second, a negative pressure fixing component 20. The function of the negative pressure fixing component 20 is to create a negative pressure environment between the contact surface of the sealing component and the battery filling hole, thereby strengthening the connection tightness between the sealing component and the battery filling hole through the principle of negative pressure.

[0036] Normally, the battery filling hole is circular, and the nail body 12 is also cylindrical to accommodate it. In some embodiments, if a square or other shaped battery filling hole is present, the shape of the nail body 12 can also be adjusted to be square or other corresponding shapes to accommodate the battery filling hole.

[0037] In some embodiments, to facilitate smoother insertion of the sealing component body 10 into the battery filling hole, the shape of the nail head 11 can be designed to provide a guiding function. For example... Figure 1 As shown, the radial dimension of the nail head 11 decreases along the insertion direction of the sealing component, which is the direction in which the nail body 12 points towards the nail head 11. Because the radial dimension of the nail head 11 decreases along the insertion direction of the sealing component, there is a significant dimensional difference between the nail head 11 and the battery filling hole when the sealing component is inserted. Even if there is a certain offset between the axis of the nail body 12 and the axis of the battery filling hole, the nail head 11 can still be smoothly inserted into the battery filling hole, greatly reducing the accuracy requirements for alignment during the use of the sealing component. Furthermore, the gradually decreasing radial dimension of the nail head 11 can provide a guide slope, which acts as a guide to help the sealing component body 10 be correctly inserted into the battery filling hole. As an example, the nail head 11 can be frustum-shaped. As another example, the nail head 11 can also be conical.

[0038] The negative pressure fastener 20 can be divided into a negative pressure side and a positive pressure side. The negative pressure side refers to the side of the negative pressure fastener 20 where the pressure is lower than atmospheric pressure during use, and the positive pressure side refers to the side of the negative pressure fastener 20 where the pressure is higher than atmospheric pressure during use. The negative pressure fastener 20 achieves its fastening function through the suction force formed by the pressure difference between the positive and negative pressure sides.

[0039] In this disclosed embodiment, the negative pressure fixing member 20 is disposed on the nail body 12. Specifically, the negative pressure fixing member 20 is disposed around the outer periphery of the nail body 12, and the negative pressure side of the negative pressure fixing member 20 faces the nail head 11. During the process of inserting the sealing member into the battery filling hole, the nail head 11 is inserted into the battery filling hole first. At this time, the negative pressure side of the negative pressure fixing member 20 will face the plane where the battery filling hole is located, that is, the surface of the battery case where the battery filling hole is located. As the insertion depth of the nail head 11 increases, the negative pressure side of the negative pressure fixing member 20 gradually approaches the surface of the battery case where the battery filling hole is located, and then contacts and even presses against the surface of the battery case. Since the negative pressure side of the negative pressure fixing member 20 is in contact with the surface of the battery case, the air pressure between the battery injection hole and the negative pressure fixing member 20 can be in a negative pressure state, that is, the air pressure is lower than atmospheric pressure. The other side of the negative pressure fixing member 20 is in a positive pressure state, thereby forming a suction force to fix the negative pressure fixing member 20 to the surface of the battery case where the battery injection hole is located, and then fix the sealing member body 10 inside the battery injection hole.

[0040] As an example, some embodiments of this disclosure may employ Figure 1 The suction cup shown serves as a negative pressure fixing component 20. The concave surface of the suction cup is the negative pressure side. By applying pressure to expel air from the concave surface of the suction cup, a negative pressure is created, generating suction. In this embodiment, the concave surface of the suction cup faces the nail head. As the insertion depth of the nail head increases, the concave surface of the suction cup gradually approaches the surface of the battery casing where the battery filling hole is located, eventually contacting and even pressing against the surface of the battery casing. As the air between the concave surface of the suction cup and the surface of the battery casing is expelled, the suction cup deforms, creating a negative pressure environment between the concave surface of the suction cup and the surface of the battery casing, thereby generating suction.

[0041] The above describes the process of achieving negative pressure fixation using a squeeze-type suction cup. In practical applications, a vacuum pump exhaust-type suction cup can also be used to achieve negative pressure fixation. A control valve injects compressed air from an air pump through a nozzle; the flow of compressed air generates a high-speed jet, which carries away the air inside the suction cup, creating negative pressure. In practical applications, other types of suction cups, such as airflow negative pressure suction cups, can also be used to achieve negative pressure fixation. Airflow negative pressure suction cups connect a vacuum pump to the suction port of the suction cup body, extracting air from the suction cup body to form a negative pressure chamber.

[0042] It should be noted that this disclosure does not impose strict restrictions on the type of suction cup used. Considering manufacturing costs and operational complexity, extrusion suction cups may be preferred.

[0043] As another example, the embodiments disclosed herein can also use a plate with an air extraction channel as a negative pressure fixing component. Unlike a suction cup, a plate with an air extraction channel does not need to deform when forming a negative pressure environment. It is connected to a vacuum pump through the air extraction channel on the plate. The vacuum pump continuously extracts air from the negative pressure side of the plate from the air extraction channel, thereby forming a negative pressure environment between the negative pressure side and the surface of the battery casing.

[0044] In practical applications, suction cups are preferred as negative pressure fixing components due to considerations of ease of operation and cost. Suction cups can be made of materials such as silicone, nitrile rubber, and thermoplastic elastomers; there are no major restrictions here.

[0045] It should be noted that, in order to ensure that the sealing component body 10 can be inserted into the battery filling hole, the radial dimension of the sealing component body 10 should be less than or equal to the radial dimension of the battery filling hole. Furthermore, to ensure a tight seal, the difference in radial dimension between the sealing component body 10 and the battery filling hole should not be too large. As an example, the difference in radial dimension between the sealing component body 10 and the battery filling hole can be controlled to be less than 1 mm.

[0046] It should be noted that the numerical range of the radial dimension difference between the sealing component body 10 and the battery filling hole described above is only an example. In actual applications, the range and specific value of the radial dimension difference between the sealing component body 10 and the battery filling hole can be adjusted according to actual needs. For example, the radial dimension difference between the sealing component body 10 and the battery filling hole can be controlled to be less than 0.5mm or 1.5mm.

[0047] It should be further explained that when the negative pressure fixing component 20 forms a negative pressure fixing with the surface of the battery case where the battery filling hole is located, the negative pressure fixing component 20 needs to be in a relatively fixed state with the sealing component body 10, so as to ensure that when the negative pressure fixing component 20 is fixed on the surface of the battery case where the battery filling hole is located, the sealing component body 10 is also fixed inside the battery filling hole.

[0048] In some embodiments, the negative pressure fixing member 20 can be permanently fixed to the sealing member body 10. The negative pressure fixing member 20 can be fixedly connected to the outer periphery of the nail body 12 by a non-removable connection method such as welding and bonding. In this case, applying a force directly to the sealing member body 10 in the direction of the nail head will allow the negative pressure side of the negative pressure fixing member 20 to contact the surface of the battery case.

[0049] Taking the case where the negative pressure fixing component 20 uses a suction cup as an example, the suction cup can be adhered to the nail body 12 of the sealing component body 10. In use, after aligning the nail head 11 with the battery filling hole, it is inserted into the battery filling hole, and a force is applied to the sealing component body 10 in the direction of the nail head, causing the sealing component body 10 to move towards the battery filling hole. As the insertion depth increases, the suction cup gradually approaches the surface of the battery case where the battery filling hole is located, until the concave surface of the suction cup contacts and presses against the surface of the battery case where the battery filling hole is located. Under the action of the compression force, the air in the concave surface of the suction cup is discharged from the concave surface of the suction cup, thereby creating a negative pressure environment between the concave surface of the suction cup and the surface of the battery case where the battery filling hole is located.

[0050] In other embodiments, the negative pressure fixing member 20 is disposed on the outer periphery of the nail body 12 in a detachable connection manner, and the negative pressure fixing member 20 can be fixed to the sealing member body 10 only when negative pressure is formed. In other words, the negative pressure fixing member 20 has two states: one is an active state that moves along the axial direction of the nail body, and the other is a fixed state that is stationary relative to the nail body.

[0051] The aforementioned detachable connection method allows the distance between the negative pressure fixing component 20 and the nail head 11 to be adjustable, which in turn facilitates flexible adjustment of the length of the sealing component body 10 inserted into the battery filling hole during negative pressure fixing, thereby adapting to different battery models.

[0052] Based on the detachable negative pressure fastener 20, some embodiments of this disclosure provide exemplary sealing component structures. Figure 2 Exemplary structural diagrams of anti-detachment sealing components according to some embodiments of this disclosure are shown, such as... Figure 2 As shown, the sealing component may also be provided with a buckle 30, which is provided on the outer periphery of the nail body 12 and is located on the positive pressure side of the negative pressure fixing component 20.

[0053] In this embodiment, the function of the buckle 30 is to limit the negative pressure fixing member 20 in the fixed state. Specifically, the buckle 30 is fixed at a certain position on the outer periphery of the nail body 12 in the fixed state. When the sealing member is inserted into the battery filling hole, as the insertion depth increases, since the negative pressure fixing member 20 is detachably connected to the outer periphery of the nail body 12, it moves towards its positive pressure side under the push of the battery casing surface where the battery filling hole is located. Since the buckle 30 is located on the positive pressure side of the negative pressure fixing member 20 and fixed at a certain position on the outer periphery of the nail body 12, as the negative pressure fixing member 20 moves towards its positive pressure side, the buckle 30 will limit the negative pressure fixing member 20. Finally, the negative pressure fixing member 20 is clamped between the buckle 30 and the battery casing surface and comes into contact with both.

[0054] Taking the suction cup as an example, as the suction cup moves toward its convex side, the buckle 30 will eventually squeeze the convex side of the suction cup and form a squeezing force. The squeezing force causes the air between the concave side of the suction cup and the surface of the battery case to be expelled, thereby creating a negative pressure environment between the concave side of the suction cup and the surface of the battery case.

[0055] In this embodiment, in order to achieve the fixed state of the buckle 30, the outer periphery of the nail body 12 has a structure that cooperates with the buckle 30 to achieve the fixed state of the buckle.

[0056] As an example, the buckle 30 can be like Figure 2 As shown, the contact surface between the internal thread and the nail body 12 is provided with an internal thread, and correspondingly, the outer circumference of the nail body 12 is provided with an external thread that matches the internal thread. The engagement between the internal and external threads enables threaded transmission. Rotating the latch 30 allows it to move axially along the nail body 12, and stopping the rotation fixes the latch 30 in the designated position on the nail body 12. Compared to directly pressing the sealing component, this method of indirectly generating force by rotating the latch is more labor-saving in operation.

[0057] In some embodiments, the entire outer periphery of the nail body 12 may be provided with external threads to allow the latch 30 to have the largest possible range of motion. In other embodiments, to improve the smoothness of movement of the negative pressure fixing member 20, external threads may be provided only on a portion of the outer periphery of the nail body 12. Figure 2 As shown, the outer periphery of the nail body 12 includes a threaded outer periphery 121 and a smooth outer periphery 122. The threaded outer periphery 121 has external threads, while the smooth outer periphery 122 has a smooth surface. The threaded outer periphery 121 is located on the side of the nail body away from the nail head, while the smooth outer periphery 122 is located on the side of the nail body 12 closer to the nail head 11. A snap-fit ​​30 surrounds the threaded outer periphery 121, and the internal thread of the snap-fit ​​30 can engage with the external thread on the threaded outer periphery 121 to achieve threaded transmission. A negative pressure fixing member 20 surrounds the smooth outer periphery 122. Compared to the threaded outer periphery 121, the smooth outer periphery 122 reduces the friction during the movement of the negative pressure fixing member 20, improving the smoothness of its movement.

[0058] As another example, the latch 30 may also include a pin. Figure 3 An exemplary structural diagram of an anti-detachment sealing component according to some embodiments of this disclosure is shown. Figure 3 As shown, the outer periphery of the nail body 12 has multiple pin holes 123 arranged along the axis. When the pin is inserted into the pin hole, the buckle is in a fixed state.

[0059] In some embodiments, the buckle can be directly formed by a long strip-shaped pin, the length of which must be greater than the diameter of the nail body. When the buckle is in the fixed state, the long strip-shaped pin passes through the pin hole on the periphery of the nail body, and the pin exposed on the outside of the nail body at this time will limit the negative pressure fixing component.

[0060] In other embodiments, Figure 4 Exemplary structural diagrams of the snap fasteners according to some embodiments of this disclosure are shown, such as Figure 4 As shown, the buckle 30 may include a circular collar 31 and a pin 32, wherein the pin 32 is fixed on the circular collar 31 and the sliding direction of the pin 32 is parallel to the plane of the circular collar 31. The circular collar 31 can be arranged around the outer periphery of the nail body 12. When the buckle 30 needs to be fixed on the nail body 12, the pin 32 only needs to be slid towards the inside of the circular collar 31 so that the pin 32 is inserted into the pin hole 123 on the outer periphery of the nail body 12. At this time, the circular collar 31 can limit the negative pressure fixing member 20.

[0061] As another example, the clip can be a cantilever clip, with a protruding male thread and a corresponding groove on the nail body serving as a female thread. As yet another example, the clip can include a circular collar and a screw. The circular collar has a threaded hole on its outer circumference, and the screw is threaded into the hole. Rotating the screw adjusts the length of the screw protruding from the inside of the circular collar. The circular collar surrounds the outer circumference of the nail body. When the length of the screw protruding from the inside of the circular collar reaches a certain point, the friction between the inner circumference of the circular collar and the outer circumference of the nail body reaches a threshold, thus achieving clip fixation.

[0062] The above lists several snap-fit ​​structures applicable to the sealing components in this disclosure. It is understood that, in addition to the snap-fit ​​structures mentioned above, there are many other snap-fit ​​implementation methods that are also applicable to this disclosure in actual applications, which will not be listed here.

[0063] Furthermore, some embodiments disclosed herein also include a buffer 40 between the buckle 30 and the negative pressure fixing member 20, which is used to transfer the force applied by the buckle 30 to the positive pressure side of the negative pressure fixing member 20 and to provide a certain buffer space.

[0064] Figure 5 Exemplary structural diagrams of anti-detachment sealing components according to some embodiments of this disclosure are shown, such as... Figure 5 As shown, the buffer 40 is arranged around the outer periphery of the nail body 12 and is located between the buckle 30 and the negative pressure fixing member 20.

[0065] When the sealing component is inserted into the battery filling hole, as the insertion depth increases, the negative pressure fixing component 20, which is detachably connected to the outer periphery of the nail body 12, moves towards its positive pressure side under the push of the battery casing surface where the battery filling hole is located. As the negative pressure fixing component 20 moves, its positive pressure side comes into contact with the buffer component 40. Under the push of the negative pressure fixing component 20, the buffer component 40 and the negative pressure fixing component 20 move closer together towards the latch 30 until the buffer component 40 contacts the latch 30. When the latch 30 is in the fixed state, the latch 30 contacts and compresses the buffer component 40, applying a force towards the nail head. The buffer component 40 then transmits the force applied by the latch 30 to the positive pressure side of the negative pressure fixing component 20, creating a negative pressure environment on the negative pressure side of the negative pressure fixing component 20.

[0066] Alternatively, when the sealing component is inserted into the battery filling hole, the movable latch 30 moves closer to the negative pressure fixing member 20. Pushed by the latch 30, the buffer member 40 moves closer to the negative pressure fixing member 20 along with the latch 30 until the buffer member 40 contacts the negative pressure fixing member 20. Then, the movable latch 30 applies a force towards the nail head to the buffer member 40, which transmits this force to the positive pressure side of the negative pressure fixing member 20, creating a negative pressure environment on the negative pressure side of the negative pressure fixing member 20.

[0067] As an example, buffer 40 can be adopted as follows: Figure 5 The spring shown has an inner diameter larger than the diameter of the nail body, allowing it to be positioned around the outer circumference of the nail body. In this embodiment, the sealing component utilizes the elastic deformation of the spring to absorb impact energy and releases it through the spring's rebound. Springs, as cushioning components, offer advantages such as simple structure, low cost, and ease of maintenance.

[0068] As another example, the buffer 40 can also be a ring made of a buffering material such as a rubber ring, with the inner diameter of the ring being larger than the diameter of the nail body, so that the ring can be set around the outer periphery of the nail body. In this embodiment, the sealing component utilizes the elastic deformation of rubber to absorb impact energy, and the ring made of buffering material has advantages such as low cost, ease of processing, and corrosion resistance as a buffer component.

[0069] As another example, the buffer 40 can also be a mechanical device such as a pneumatic buffer or a hydraulic buffer, but compared with the buffers such as springs and rubber rings mentioned above, such mechanical devices are more expensive. Therefore, in practical applications, buffers that utilize elastic deformation, such as springs and rubber rings, can be preferred.

[0070] In summary, the present disclosure provides a sealing component that prevents detachment. A negative pressure fixing member is provided on the sealing component body. When the sealing component body is inserted into the battery filling hole, the negative pressure side of the negative pressure fixing member can contact and squeeze the surface of the battery case where the battery filling hole is located, thereby forming a negative pressure environment between the negative pressure fixing member and the surface of the battery case where the battery filling hole is located. The principle of negative pressure fixing is used to strengthen the tightness of the connection between the sealing component and the battery filling hole, effectively preventing electrolyte leakage caused by the detachment of the sealing component.

[0071] Based on the above-described sealing component structure, some embodiments disclosed herein provide a sealing component that uses a suction cup as a negative pressure fixing component. The concave surface of the suction cup faces the surface of the battery casing where the battery filling hole is located. When using this sealing component to plug the battery filling hole, the air on the concave surface of the suction cup can be expelled by squeezing the suction cup, thereby creating a negative pressure environment between the concave surface of the suction cup and the surface of the battery casing where the battery filling hole is located. The principle of negative pressure fixing is used to strengthen the tightness of the connection between the sealing component and the battery filling hole, effectively preventing electrolyte leakage caused by the sealing component falling off.

[0072] Furthermore, some embodiments disclosed herein provide a sealing component that prevents detachment, wherein a negative pressure fixing member is fixedly connected to the nail body. When using this sealing component to plug the battery filling hole, by applying a force toward the nail head towards the sealing component body, the negative pressure fixing member can be moved toward the surface of the battery casing where the battery filling hole is located, so that the two come into contact and are squeezed, thereby forming a negative pressure environment. This sealing component has a simple structure and low cost.

[0073] Other embodiments disclosed herein also provide a sealing component to prevent detachment, wherein a negative pressure fixing member is movably connected to the nail body. A buckle is added to the sealing component to limit the movement of the negative pressure fixing member. The negative pressure fixing member movably connected to the nail body facilitates adjustment of the length of the sealing component body extending into the battery filling hole during negative pressure fixing, thereby expanding the range of battery models compatible with the sealing component. One type of buckle is detachably connected to the nail body via a threaded drive. When using this sealing component to plug the battery filling hole, rotating the buckle moves it to contact the negative pressure fixing member. Further rotation of the buckle pushes the negative pressure fixing member toward the surface of the battery casing where the battery filling hole is located, causing them to contact and press against each other, thus creating a negative pressure environment. Compared to a sealing component where the negative pressure fixing member is fixedly connected to the nail body, this sealing component indirectly generates a force applied to the positive pressure side of the negative pressure fixing member by rotating the buckle, making operation more labor-saving.

[0074] In some embodiments of this disclosure, a sealing component for preventing detachment is also provided, which has a buffer between the negative pressure fixing bracket and the buckle, which can both transmit the force applied by the buckle to the positive pressure side of the negative pressure fixing component and provide a certain buffer space.

[0075] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A sealing component designed to prevent detachment, characterized in that, include: A sealing component body (10), the sealing component body (10) comprising a columnar nail body (12) and a nail head (11) having a guide bevel; and A negative pressure fixing member (20) is arranged around the outer periphery of the nail body (12), and the negative pressure side of the negative pressure fixing member (20) faces the nail head (11), so that when the nail head (11) is inserted into the hole, the negative pressure fixing member (20) contacts the surface where the top of the hole is located, and a negative pressure environment is formed between the negative pressure side and the surface where the top of the hole is located.

2. The sealing component according to claim 1, characterized in that, Also includes: buckle (30); The buckle (30) is disposed on the outer periphery of the nail body (12), and the outer periphery of the nail body (12) has a structure that cooperates with the buckle (30) to achieve a buckle-fixed state; The buckle (30) is located on the positive pressure side of the negative pressure fixing member (20) to limit the movement of the negative pressure fixing member (20) toward its positive pressure side in the fixed state.

3. The sealing component according to claim 2, characterized in that, Also includes: Buffer (40); The buffer (40) is arranged around the outer periphery of the nail body (12) and is located between the buckle (30) and the negative pressure fixing member (20) to transmit the force applied by the buckle (30) to the positive pressure side of the negative pressure fixing member (20), so that the negative pressure fixing member (20) contacts the surface where the top of the hole is located, and a negative pressure environment is formed between the negative pressure side and the surface where the top of the hole is located.

4. The sealing component according to claim 1, characterized in that, The negative pressure fixing member (20) is fixedly connected to the outer periphery of the nail body (12).

5. The sealing component according to any one of claims 1-4, characterized in that, The negative pressure fixing component (20) includes a suction cup, the concave surface of which is the negative pressure side and faces the nail head.

6. The sealing component according to claim 2, characterized in that, The contact surface between the buckle (30) and the nail body (12) is provided with an internal thread, and the outer periphery of the nail body (12) is provided with an external thread that matches the internal thread.

7. The sealing component according to claim 6, characterized in that, The outer periphery of the nail body (12) includes: a threaded outer periphery (121) and a smooth outer periphery (122); The outer periphery of the thread (121) is disposed on the side of the nail body (12) away from the nail head (11), the external thread is disposed on the outer periphery of the thread (121), and the buckle (30) is disposed around the outer periphery of the thread (121); The smooth outer periphery (122) is disposed on the nail body (12) near the nail head (11), and the negative pressure fixing member (20) is disposed around the smooth outer periphery (122).

8. The sealing component according to claim 2, characterized in that, The buckle (30) includes: a pin; The outer periphery of the nail body (12) is provided with a plurality of pin holes (123) arranged along the axis, so that the buckle (30) is in a fixed state when the pin is inserted into the pin hole (123).

9. The sealing component according to claim 3, characterized in that, The buffer (40) includes a spring, the inner diameter of which is larger than the diameter of the nail body (12).

10. The sealing component according to claim 1, characterized in that, The radial dimension of the nail head (11) decreases along the insertion direction of the sealing component, and the insertion direction of the sealing component is the direction in which the nail body (12) points to the nail head (11).

Images