Novel sealing rubber nail, battery cover plate and battery

Abstract

The utility model relates to a novel sealing rubber nail, a battery cover plate and a battery, the sealing rubber nail is used for being installed on the battery cover plate, and the battery cover plate is provided with a liquid injection hole; the sealing rubber nail comprises a rubber nail body, a sealing lug is formed on the wall face of the rubber nail body, a sealing groove allowing the sealing lug to be embedded is formed in the position of the liquid injection hole, and a rotating annular channel is further formed in the inner wall face of the liquid injection hole and communicates with the sealing groove. The sealing lug and the first assembly face of the rotary ring channel and the plastic nail body and the second assembly face of the liquid injection hole are connected in a sealed mode. The sealing rubber nail is ingenious in structure, the sealing lug is designed, the sealing groove is formed in the liquid injection hole, the rotating annular channel capable of blocking the sealing lug is formed in the inner wall of the liquid injection hole, and the sealing lug and the rotating annular channel are vertically matched and mutually extruded, so that the position of the sealing rubber nail is fixed, and the problem that the rubber nail is prone to falling off is solved; and the safety performance of the battery is ensured while the sealing performance of the liquid injection hole is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a novel sealing glue nail, a battery cover plate and a battery. Background Art

[0002] Lithium battery is a chemical power source that uses lithium metal or lithium ions as electrode materials. They have the characteristics of high energy density, long life, low self-discharge rate and fast charging capability. Lithium batteries are widely used in many fields such as portable electronic devices, electric vehicles, energy storage systems, etc. The battery usually includes multiple battery cells, and multiple battery cells are connected in series or in series-parallel. Among them, the battery cell generally has a battery cover, that is, a battery top cover, and the battery cover is provided with a liquid injection hole, and then a sealing nail is used to seal and connect it to the liquid injection hole of the top cover.

[0003] The sealing process of the liquid injection port of the lithium battery cover is usually Fig.10 The existing sealant nail 4' shown in the figure realizes sealing. The existing sealant nail 4' is currently often used in an interference fit manner to seal with the existing injection hole 3'. When the sealing ring material is too hard, the existing sealant nail 4' is easily scratched during the insertion process. Fig.11 and Fig.12 As shown, when the battery is vacuumed under negative pressure, the existing sealing nail 4' will be subjected to an upward force, causing the material scratched by the existing sealing nail 4' to fall off, affecting the safety performance of the battery. When the material is soft and the interference fit is insufficient, on the one hand, the existing sealing nail 4' will fall off during the vacuuming and helium filling process, and on the other hand, it will also cause the existing sealing nail 4' to be insufficiently sealed, and even cause the existing sealing nail 4' to fall off the cover plate, seriously affecting the safety performance of the battery. In addition, during the helium filling process, the uncertainty of the fit between the existing sealing nail 4' and the existing injection hole 3' will also affect the rate of helium filling, thereby affecting the manufacturing efficiency of the battery.

[0004] This section merely provides background information related to the present disclosure and is not necessarily prior art. Utility Model Content

[0005] In order to overcome the defects in the above-mentioned prior art, the first utility model purpose of the utility model is to provide a new type of sealing nail. The new type of sealing nail has a simple and ingenious structure. By designing the injection hole and the sealing nail, the sealing nail can be prevented from falling into the battery, thereby ensuring the performance of the battery. The second utility model purpose of the utility model is to provide a battery cover, which, by applying the above-mentioned new type of sealing nail, also has the advantages of good sealing performance and excellent use effect. The third utility model purpose of the utility model is to provide a battery, which, by applying the above-mentioned battery cover, also has the advantages of the above-mentioned battery cover.

[0006] The above-mentioned new sealing nails, battery cover and battery are technically related to each other and belong to the same utility model concept.

[0007] In order to achieve the above-mentioned first utility model purpose, the utility model adopts the following technical scheme: a new type of sealing nail, used to be installed on a battery cover, the battery cover is provided with a liquid injection hole; the sealing nail includes a nail body, a sealing ear is formed on the wall surface of the nail body, a sealing groove for the sealing ear to be embedded is formed at the liquid injection hole, and a rotating ring channel is also formed on the inner wall surface of the liquid injection hole, and the rotating ring channel is connected to the sealing groove; the assembly surface one of the sealing ear and the rotating ring channel and the assembly surface two of the nail body and the liquid injection hole are both sealed. Connection.

[0008] As a preferred solution of the utility model, the first assembly surface between the sealing ear and the rotating ring channel and the second assembly surface between the glue nail body and the injection hole both adopt interference fit.

[0009] As a preferred solution of the utility model, a ventilation groove is formed on the wall surface of the liquid injection hole, and the ventilation groove passes through the liquid injection hole. The sealing ear can cover the ventilation groove along the rotating ring.

[0010] As a preferred solution of the utility model, the glue nail body is a straight-inserted cylindrical type; the thickness of the sealing ear is adapted to the height of the rotating ring.

[0011] As a preferred solution of the utility model, blocking parts capable of blocking the movement of the sealing ears are formed at both ends of the rotating ring, and the blocking parts are arranged close to the positions of the ventilation groove and the sealing groove.

[0012] As a preferred solution of the utility model, a rotation groove is formed on the top surface of the rubber nail body.

[0013] As a preferred solution of the utility model, the rotating groove is in a cross shape.

[0014] As a preferred solution of the present invention, the bottom of the rubber nail body is designed with rounded corners.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: a new type of sealing nail in the utility model has an ingenious structure. A sealing groove is formed at the injection hole by designing a sealing ear, and a rotating ring channel that can block the sealing ear is formed on the inner wall of the injection hole. The position of the sealing nail is fixed by the upper and lower cooperation of the sealing ear and the rotating ring channel and the mutual extrusion between them, and there will be no problem of the nail falling off easily, thereby ensuring the sealing of the injection hole while ensuring the safety performance of the battery.

[0016] Furthermore, the utility model forms a vent groove on the injection hole, so that the gas can flow out directly through the vent groove, thereby ensuring the stability of gas outflow. After the helium is filled, the sealing nail is rotated to make the sealing ear block the vent groove, thereby avoiding the phenomenon of slag falling due to plugging and unplugging. The interference fit between the sealing ear and the vent groove realizes the sealing of the cover plate by the sealing nail.

[0017] In order to achieve the above second utility model purpose, the utility model adopts the following technical solution: a battery cover plate, using the above new type of sealing nail.

[0018] Compared with the prior art, the beneficial effect of the present invention is that a battery cover in the present invention also has the advantage of good sealing performance by applying the above-mentioned new type of sealing nails.

[0019] In order to achieve the third utility model objective, the utility model adopts the following technical solution: a battery, including the battery cover.

[0020] Compared with the prior art, the beneficial effect of the utility model is that a battery in the utility model has the advantages of excellent performance and long life by applying the above-mentioned battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the battery cover in the embodiment of the utility model;

[0022] Figure 2 This is a structural cross-sectional view of a battery cover in an embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A schematic diagram of the structure enlarged at B in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the battery cover in the embodiment of the utility model;

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure enlarged at C in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of the sealing nail in the embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of the initial state of the assembly of the sealing nail and the injection hole in the embodiment of the utility model;

[0028] Figure 8 It is a schematic diagram of the ventilation state of the sealing nail and the injection hole in the embodiment of the utility model;

[0029] Fig. 9This is a schematic diagram of the closed state of the sealing nail and the injection hole in the embodiment of the utility model;

[0030] Fig.10 It is a structural schematic diagram of a battery cover in the prior art;

[0031] Fig.11 It is a schematic diagram of the vacuum state of the sealing nail in the prior art;

[0032] Fig.12 It is a schematic diagram of the helium-filled state of a sealing nail in the prior art.

[0033] Figure numerals: 1, battery cover; 2, mounting groove; 3, injection hole; 4, sealing nail; 4-1, nail body; 4-2, sealing ear; 4-3, rotation groove; 5, assembly surface one; 6, assembly surface two; 7, ventilation groove; 8, sealing groove; 9, rotation ring; 3', existing injection hole; 4', existing sealing nail. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0036] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0037] The existing sealant nail 4' is currently often used in an interference fit manner to seal with the existing injection hole 3'. When the sealing ring material is too hard, the existing sealant nail 4' is easily scratched during the insertion process. Fig.11 and Fig.12As shown, when the battery is vacuumed under negative pressure, the existing sealant nail 4' will be subjected to an upward force, causing the material scratched by the existing sealant nail 4' to fall off, affecting the safety performance of the battery. When the material is soft and the interference fit is insufficient, on the one hand, the existing sealant nail 4' will fall off during the vacuuming and helium filling process, and on the other hand, the sealing performance of the existing sealant nail 4' will be insufficient, and even the existing sealant nail 4' will fall off the cover plate, seriously affecting the safety performance of the battery.

[0038] Embodiment 1: In order to solve the above technical problems, Figures 1 to 9 As shown, a new type of sealing nail in this embodiment is used to be installed on the battery cover 1. The battery cover 1 is provided with an injection hole 3. The injection hole 3 is for injecting electrolyte in the final stage of battery assembly. The electrolyte is a key component in the battery. It can provide an ion transmission medium, thereby realizing the charging and discharging process of the battery. In order to prevent the volatilization or leakage of the electrolyte during the charging and discharging process of the battery, and also to prevent the invasion of external moisture and impurities, the sealing nail 4 is sealed and installed at the injection hole 3. Specifically, the sealing nail 4 in this embodiment adopts a knob-type design, which can avoid the plugging and unplugging phenomenon during the disassembly and assembly process, thereby reducing the probability of slag falling. Specifically, the sealing nail 4 includes a nail body 4-1. The nail body 4-1 can adopt a straight-inserted cylindrical type. During installation, the nail body 4-1 can be directly inserted into the injection hole 3. In order to prevent the nail body 4-1 from falling into the battery, in this embodiment, a sealing ear 4-2 is integrally formed on the wall surface of the nail body 4-1. Correspondingly, a sealing groove 8 for the sealing ear 4-2 to be embedded is formed at the opening of the above-mentioned liquid injection hole 3, and a rotating ring channel 9 is also formed on the inner wall surface of the above-mentioned liquid injection hole 3. The rotating ring channel 9 is a circular ring channel. The above-mentioned rotating ring channel 9 is connected to the above-mentioned sealing groove 8. The above-mentioned sealing ear 4-2 falls from the above-mentioned sealing groove 8 to the above-mentioned rotating ring channel 9, and then the sealing nail 4 is rotated to make the sealing ear 4-2 rotate to a position away from the above-mentioned sealing groove 8, thereby forming an upper and lower obstruction, that is, the upper and lower walls of the above-mentioned rotating ring channel 9 obstruct the above-mentioned sealing ear 4-2, so as to avoid the sealing nail from falling off and the occurrence of slag. The assembly surface 1 5 between the sealing ear 4-2 and the rotating ring 9 and the assembly surface 2 6 between the nail body 4-1 and the injection hole 3 are both sealed, thereby ensuring the sealing of the injection hole 3 when the new sealing nail is installed and used.

[0039] In order to simplify the installation steps in this embodiment, the assembly surface 1 5 between the sealing ear 4-2 and the rotating ring channel 9 and the assembly surface 2 6 between the glue nail body 4-1 and the injection hole 3 are both interference fit. The interference fit can provide higher connection strength to ensure that the sealing glue nail 4 will not loosen due to vibration or impact during use, thereby ensuring the sealing of the connection and preventing electrolyte leakage.

[0040] The sealing ear 4 - 2 may be designed to be fan-shaped, and the opening angle of the sealing groove 8 may be slightly larger than the opening angle of the sealing ear 4 - 2 , so that the sealing ear 4 - 2 may be easily assembled into the sealing groove 8 .

[0041] In the prior art, during the helium filling process, the uncertainty of the cooperation between the existing sealing nail 4' and the existing injection hole 3', and the lack of a special inflation channel, will also affect the rate of helium filling. In order to solve this technical problem, in this embodiment, a vent groove 7 is formed on the wall of the injection hole 3, and the vent groove 7 runs through the injection hole 3. By rotating the sealing ear 4-2, the sealing ear 4-2 can block the vent groove 7 along the rotating ring 9, that is, when the battery needs to be filled with helium, the sealing ear 4-2 can be rotated to a position away from the vent groove 7 to form an inflation channel that runs through from top to bottom, thereby ensuring the stability of helium filling and greatly improving the safety of battery use. When the inflation is completed, the sealing ear 4-2 only needs to be rotated to the vent groove 7 and completely block the vent groove 7, thereby avoiding the leakage of helium and electrolyte.

[0042] The above-mentioned glue nail body 4-1 is a straight-insert cylindrical type. Compared with designs such as threaded types, the straight-insert cylindrical type is usually simpler, easier to manufacture and assemble, and the straight-insert design allows for quick insertion and fixation, which can improve the efficiency and speed of assembly. The thickness of the above-mentioned sealing ear 4-2 is adapted to the height of the above-mentioned rotating ring channel 9, and the adapted size can ensure a close fit between the sealing ear 4-2 and the rotating ring channel 9, thereby improving the stability of the overall structure. In applications that require sealing, the adapted size can prevent liquid or gas from leaking through the gap between the sealing ear 4-2 and the rotating ring channel 9. The adapted size helps to disperse the force, improve the bearing capacity and durability of the structure, and thereby ensure the stability of the connection between the sealing ear 4-2 and the rotating ring channel 9.

[0043] Both ends of the rotating ring channel 9 are formed with blocking parts that can block the movement of the sealing ear 4-2. The blocking parts are designed to limit the movement of the sealing ear 4-2. The blocking parts can limit the movement of the sealing ear 4-2 in the rotating ring channel 9 to ensure that it is in the correct position to maintain the stability and functionality of the structure. Since the sealing ear 4-2 and the rotating ring channel 9 need to be sealed, the blocking parts can enhance the sealing effect and prevent leakage. The blocking parts are arranged close to the positions of the ventilation groove 7 and the sealing groove 8, so that the sealing ear 4-2 can be easily aligned with the ventilation groove 7 and the sealing groove 8 to reduce the difficulty of operation.

[0044] The top surface of the above-mentioned nail body 4-1 is formed with a rotation groove 4-3 that can rotate the above-mentioned nail body 4-1 itself. The rotation groove 4-3 increases the flexibility of the use of the nail body 4-1, so that it can adapt to different installation angles or directions, and is convenient for operators to operate. Through the rotation groove 4-3, the position of the nail body 4-1 can be adjusted without applying too much force, reducing the stress during the assembly process. The rotation groove 4-3 can also reduce the contact between the nail body 4-1 and other parts during the rotation process, thereby reducing wear. The above-mentioned rotation groove 4-3 is in a concave cross shape. The cross-shaped rotation groove 4-3 allows the nail body 4-1 to rotate in four basic directions (up, down, left, and right), providing greater flexibility. The concave cross-shaped groove can also facilitate the grasping and operation of users or mechanical tools, improving the convenience and accuracy of operation. The above-mentioned rotation groove 4-3 can also be a straight line or other shapes, the main purpose of which is to enable the above-mentioned nail body 4-1 to rotate itself, so that it can be assembled at the injection hole 3 to ensure the sealing at the injection hole 3.

[0045] The bottom of the above-mentioned nail body 4-1 is rounded, which helps the nail maintain its shape when it is repeatedly used or impacted, thereby improving durability. The rounded corners can also reduce the wear of the nail when it contacts other parts during use, thereby ensuring the service life of the nail and reducing the user's use cost.

[0046] The seal nail in this embodiment can avoid the plugging and unplugging phenomenon in the prior art by using a knob-type design, thereby solving the problem of seal nails falling off during use. The seal nail in this embodiment, by designing the sealing ear 4-2 and the rotating ring 9, adopts an upper and lower blocking design and an interference fit method, thereby solving the problems of seal nails falling into the battery and insufficient sealing at the seal nail installation site in the prior art. In this embodiment, a venting groove 7 is also designed, that is, an open gas injection channel is used to ensure that helium can be filled in sufficient quantity, thereby ensuring the performance of the battery and improving the safety of battery use.

[0047] like Figure 7 As shown, it is the initial state of the sealing nail 4, and its sealing ear 4-2 is located in the sealing groove 8. Figure 8 As shown, it is a ventilated state. In the ventilated state, the sealing ear 4-2 is located in the middle of the rotating ring 9, specifically, it is located in the middle of the venting groove 7 and the sealing groove 8; Fig. 9 As shown, it is in a closed state. When closed, the airway is sealed by rotating the sealing ear 4-2 to the ventilation groove 7 to achieve the closure of the ventilation groove 7.

[0048] Embodiment 2:

[0049] The feature that distinguishes this embodiment from the embodiment 1 is that: a new type of sealing nail in this embodiment, wherein the rotating track 9 adopts an elliptical track, and the cross section of the rotating track 9 is elliptical, that is, the design mode of large spacing in the middle and small spacing at both ends. The sealing fit between the sealing nail 4 and the injection hole 3 is achieved by using the interference fit between the outer wall surface of the cylindrical nail body 4-1 and the injection hole 3 and the interference fit design between the fan-shaped sealing ear 4-2 and the elliptical track, that is, the rotating track 9. During the rotation of the fan-shaped sealing ear 4-2, that is, the change of the sealing ear 4-2 from the length direction to the short direction in the elliptical track, the sealing ear 4-2 will be continuously squeezed, which can also achieve the sealing of the nail and ensure the sealing performance of the battery.

[0050] Embodiment 3:

[0051] A battery cover plate includes a new type of sealing nail in Example 1. By applying the above-mentioned new type of sealing nail, it also has the advantage of excellent sealing performance and can prevent the sealing nail from falling into the battery, thereby ensuring the battery performance.

[0052] Embodiment 4:

[0053] A battery, comprising the battery cover plate in embodiment 2, has the advantages of excellent sealing performance and long service life.

[0054] Embodiment 5:

[0055] An electrical device includes the battery in Example 3. The battery is used to supply power to the electrical device and also has the advantages of excellent performance and long life, thereby enhancing the user experience.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0057] Although this article uses more of the following terms: 1, battery cover; 2, mounting slot; 3, injection hole; 4, sealing nail; 4-1, nail body; 4-2, sealing ear; 4-3, rotation slot; 5, assembly surface 1; 6, assembly surface 2; 7, ventilation slot; 8, sealing slot; 9, rotation loop; 3', existing injection hole; 4', existing sealing nail, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A new type of sealing nail, characterized in that: Used to be installed on a battery cover plate (1), the battery cover plate (1) is provided with a liquid injection hole (3); the sealing nail (4) comprises a nail body (4-1), a sealing ear (4-2) is formed on the wall surface of the nail body (4-1), a sealing groove (8) for the sealing ear (4-2) to be embedded is formed at the liquid injection hole (3), a rotating ring channel (9) is also formed on the inner wall surface of the liquid injection hole (3), and the rotating ring channel (9) is connected to the sealing groove (8); the first assembly surface (5) of the sealing ear (4-2) and the rotating ring channel (9) and the second assembly surface (6) of the nail body (4-1) and the liquid injection hole (3) are both sealed.

2. A new type of sealing nail according to claim 1, characterized in that: The first assembly surface (5) between the sealing ear (4-2) and the rotating ring (9) and the second assembly surface (6) between the nail body (4-1) and the injection hole (3) are both interference fit.

3. A new type of sealing nail according to claim 2, characterized in that: A ventilation groove (7) is formed on the wall surface of the liquid injection hole (3), and the ventilation groove (7) passes through the liquid injection hole (3). The sealing ear (4-2) can cover the ventilation groove (7) along the rotating ring path (9).

4. A new type of sealing nail according to claim 3, characterized in that: The glue nail body (4-1) is a straight-insertion cylindrical type; the thickness of the sealing ear (4-2) is adapted to the height of the rotating ring track (9).

5. A new type of sealing nail according to claim 4, characterized in that: Blocking portions capable of blocking the movement of the sealing ears (4-2) are formed at both ends of the rotating ring channel (9), and the blocking portions are arranged close to the positions of the ventilation groove (7) and the sealing groove (8).

6. A new type of sealing nail according to claim 1, characterized in that: A rotation groove (4-3) is formed on the top surface of the rubber nail body (4-1).

7. A new type of sealing nail according to claim 6, characterized in that: The rotating groove (4-3) is in a cross shape.

8. The novel sealing nail according to claim 1 is characterized in that: The bottom of the rubber nail body (4-1) is designed with rounded corners.

9. A battery cover, characterized in that: A new type of sealing nail as described in any one of claims 1 to 8 is used.

10. A battery, characterized in that: Comprising the battery cover as claimed in claim 9.

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