Seal

Abstract

The utility model discloses a sealing element, and belongs to the technical field of battery preparation, the sealing element is used for sealing a liquid injection hole of a single battery, and the sealing element comprises a main body part, a first sealing part, a second sealing part and an identification part. The first sealing part is connected with the main body part; the second sealing part is arranged on the side, away from the first sealing part, of the main body part and connected with the main body part, and the first sealing part and the second sealing part are used for sealing the liquid injection hole; the identification part is used for indicating the first sealing part. By arranging the first sealing part and the second sealing part, one end can be switched to the other end for continuous use after being abraded, so that the use frequency of the sealing element can be increased, the production cost is reduced, and the production efficiency is improved. And the first sealing part and the second sealing part can be distinguished by arranging the identification part, so that an operator or a machine can quickly and accurately determine the use condition of the sealing element, and the production efficiency can be further improved.

Description

Technical Field

[0001] This application belongs to the technical field of battery preparation, and particularly relates to a seal. Background Art

[0002] With the booming development of power batteries, the control of the battery manufacturing process has been continuously strengthened. During the battery manufacturing process, moisture causes great damage to the battery performance, and in severe cases, it may even cause an explosion. Therefore, after the assembled battery is baked at high temperature, a seal is generally used to seal the liquid injection hole to isolate air. The current seal is generally made of corrosion-resistant rubber, with one end being a holding area and the other end being a locking area. The locking area is used to seal the liquid injection hole. During the production process, due to the wear of the locking area, the seal is generally used only once, resulting in high production costs and low production efficiency. Summary of the Utility Model

[0003] Purpose of the Utility Model: The embodiments of this application provide a seal, aiming to solve the technical problems of high production costs and low production efficiency of the seal.

[0004] Technical Solution: The embodiments of this application provide a seal for sealing the liquid injection hole of a single battery, including:

[0005] A main body portion;

[0006] A first sealing portion, which is connected to the main body portion;

[0007] A second sealing portion, which is arranged on the side of the main body portion away from the first sealing portion and is connected to the main body portion. The first sealing portion and the second sealing portion are used to seal the liquid injection hole;

[0008] An identification portion, which is used to indicate the first sealing portion.

[0009] In some embodiments, the identification portion is arranged on the main body portion, and the distance L1 between the identification portion and the first sealing portion is less than the distance L2 between the identification portion and the second sealing portion.

[0010] In some embodiments, the identification portion is a groove, and the groove is arranged circumferentially around the main body portion.

[0011] In some embodiments, the identification portion is a convex structure, and the convex structure is arranged circumferentially around the main body portion.

[0012] In some embodiments, the seal includes a first convex portion assembly, which is arranged around the outer periphery of the first sealing portion. The first convex portion assembly includes a plurality of first convex grains spaced apart from each other.

[0013] In some embodiments, the seal includes a second convex portion assembly, which is arranged around the outer periphery of the second sealing portion. The second convex portion assembly includes a plurality of second convex grains spaced apart from each other.

[0014] In some embodiments, the shape of the first convex particle is one of spherical, conical and cylindrical;

[0015] The shape of the second convex particle is one of spherical, conical and cylindrical.

[0016] In some embodiments, the seal has a first direction that intersects the axis of the main body portion;

[0017] The first convex portion assembly has a minimum outer diameter D1 mm in the first direction, and the maximum size of the liquid injection hole is d mm, satisfying: 0.05 ≤ (D1 - d) / d ≤ 0.1.

[0018] In some embodiments, a reinforcing member is wrapped inside the seal, and the reinforcing member extends along the axis of the main body portion.

[0019] In some embodiments, the first sealing portion includes a first body and a first guiding head connected to each other, and the first guiding head is located on the side of the first body away from the main body portion;

[0020] The second sealing portion includes a second body and a second guiding head connected to each other, and the second guiding head is located on the side of the second body away from the main body portion.

[0021] In some embodiments, the first body includes a first end connected to the main body portion and a second end connected to the first guiding head; from the first end to the second end, the outer diameter of the first body decreases;

[0022] The second body includes a third end connected to the main body portion and a fourth end connected to the second guiding head; from the third end to the fourth end, the outer diameter of the second body decreases.

[0023] In some embodiments, the axis of the main body portion, the axis of the first sealing portion and the axis of the second sealing portion coincide with each other.

[0024] Beneficial effects: The seal of the embodiment of the present application is used to seal the liquid injection hole of a single battery, and includes a main body portion, a first sealing portion, a second sealing portion and an identification portion. The first sealing portion is connected to the main body portion; the second sealing portion is arranged on the side of the main body portion away from the first sealing portion and is connected to the main body portion. The first sealing portion and the second sealing portion are used to seal the liquid injection hole; the identification portion is used to indicate the first sealing portion. By providing the first sealing portion and the second sealing portion, it can be switched to the other end for continuous use after one end is worn, so that the number of uses of the seal can be increased, the production cost can be reduced, and the production efficiency can be improved. By providing the identification portion, the first sealing portion and the second sealing portion can be distinguished, which is convenient for operators or machines to quickly and accurately determine the use situation of the seal, thereby further improving the production efficiency. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of a seal in an embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of a seal in another embodiment of the present application;

[0028] Figure 3 is a schematic structural diagram of a top cover in yet another embodiment of the present application;

[0029] Figure 4 is Figure 3 an enlarged view of part A of;

[0030] Figure 5 is a schematic structural diagram of a single cell in an embodiment of the present application;

[0031] Figure 6 is a schematic structural diagram of a single cell in another embodiment of the present application;

[0032] Figure 7 is Figure 6 a sectional view taken along line A-A of.

[0033] Reference numerals: 1, main body part; 2, first sealing part; 3, second sealing part; 4, identification part; 5, first convex part assembly; 6, second convex part assembly; 20, first body; 21, first guiding head; 30, second body; 31, second guiding head; 40, groove; 41, raised structure; 50, first convex grain; 60, second convex grain; 100, single cell; 101, liquid injection hole; 200, first end; 201, second end; 300, third end; 301, fourth end; X, first direction. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, and "at least one" means one, two, or more, unless otherwise specifically defined. In the description of the present application, "vertical" means completely vertical at 90° or almost completely vertical. For example, within the range of an included angle of 80° to 100°, it is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel. For example, within the range of 10° of complete parallelism, it is considered parallel.

[0036] With the vigorous development of power batteries, the control of the battery manufacturing process has been continuously strengthened. During the battery manufacturing process, moisture causes great damage to the battery performance and may even cause an explosion in severe cases. Therefore, after the assembled battery is baked at a high temperature, it is generally necessary to use a seal to seal the liquid injection hole to isolate the air. The material of the current seal is generally corrosion-resistant rubber, with one end being a gripping area and the other end being a locking area. The locking area is used to seal the liquid injection hole. During the production process, due to the wear of the locking area, the seal is generally used only once, resulting in high production costs and low production efficiency.

[0037] In view of this, an embodiment of the present application provides a seal for sealing the liquid injection hole of a single battery. The seal includes a main body portion, a first sealing portion, a second sealing portion, and an identification portion. The first sealing portion is connected to the main body portion; the second sealing portion is disposed on a side of the main body portion away from the first sealing portion and is connected to the main body portion. The first sealing portion and the second sealing portion are used to seal the liquid injection hole; the identification portion is used to indicate the first sealing portion. By providing the first sealing portion and the second sealing portion, it is possible to switch to the other end for continued use after one end is worn, thereby increasing the number of times the seal can be used, reducing production costs, and improving production efficiency. By providing the identification portion, it is possible to distinguish between the first sealing portion and the second sealing portion, facilitating operators or machines to quickly and accurately determine the usage situation of the seal, and thus further improving production efficiency.

[0038] The following will describe the cover protection film and vehicle of the present application in detail with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0039] Figure 1 It is a schematic structural diagram of a seal in an embodiment of the present application; Figure 2 It is a schematic structural diagram of a seal in another embodiment of the present application; Figure 3 It is a schematic structural diagram of a vehicle roof in still another embodiment of the present application; Figure 4 is Figure 3 an enlarged view of part A of Figure 5 It is a schematic structural diagram of a single battery 100 in an embodiment of the present application; Figure 6 It is a schematic structural diagram of a single battery 100 in another embodiment of the present application; Figure 7 is Figure 6 a sectional view taken along line A-A of

[0040] Referring to Figures 1 to 6 In the embodiment of the present application, a seal is provided for sealing the liquid injection hole 101 of the single battery 100. After the single battery 100 has been assembled and then subjected to high-temperature baking, a seal needs to be provided at the liquid injection hole 101 to isolate air, prevent moisture and foreign objects in the environment from entering the single battery 100, thereby improving the performance and safety of the single battery 100. The seal of the present application includes a main body portion 1, a first sealing portion 2, a second sealing portion 3, and an identification portion 4. An operator or a robotic arm can hold the main body portion 1 to stabilize the seal, avoiding errors or accidents caused by instability during the process of inserting and removing the seal. The main body portion 1 is usually a convex structure 41 to facilitate holding and operation to provide better operation convenience. The first sealing portion 2 is connected to the main body portion 1; the second sealing portion 3 is provided on a side of the main body portion 1 away from the first sealing portion 2 and is connected to the main body portion 1. The first sealing portion 2 and the second sealing portion 3 are used to seal the liquid injection hole 101. By providing the first sealing portion 2 and the second sealing portion 3, it is possible to switch to the other end for continued use after one end is worn, thereby increasing the number of uses of the seal, reducing production costs, and improving production efficiency. The identification portion 4 is used to indicate the first sealing portion 2. By providing the identification portion 4, it is possible to distinguish between the first sealing portion 2 and the second sealing portion 3, facilitating the operator or the machine to quickly and accurately determine the usage situation of the seal, thereby further improving production efficiency.

[0041] In Figure 1In the illustrated embodiment, the identification portion 4 is provided on the main body portion 1, and the distance L1 between the identification portion 4 and the first sealing portion 2 is less than the distance L2 between the identification portion 4 and the second sealing portion 3. With such a setting, it is convenient to distinguish between the first sealing portion 2 and the second sealing portion 3, facilitating the operator or machine to quickly and accurately determine the usage condition of the seal, thereby further improving production efficiency. In other embodiments, the identification portion 4 is provided on the first sealing portion 2. Setting the identification portion 4 on the first sealing portion 2 can improve intuitiveness, enabling the operator or machine to quickly and accurately determine the usage condition of the seal, improving production efficiency, and reducing the possibility of misidentification.

[0042] In Figure 1 In the illustrated embodiment, the identification portion 4 is a groove 40, and the groove 40 is arranged circumferentially around the main body portion 1. The distance L1 between the groove 40 and the first sealing portion 2 is less than the distance L2 between the identification portion 4 and the second sealing portion 3. With such a setting, it is convenient to identify the identification portion 4 and can also reduce the material usage and lower production costs. In Figure 3 In the illustrated embodiment, the identification portion 4 is a protrusion structure 41, and the protrusion structure 41 is arranged circumferentially around the main body portion 1. The protrusion structure 41 can be a visually detectable identifier such as text, icon, etc., and the present application does not limit this. Among them, when the protrusion structure 41 is provided, the protrusion structure 41 is arranged circumferentially around the main body portion 1. When the groove 40 is provided, the groove 40 is arranged circumferentially around the main body portion 1.

[0043] In some embodiments, the seal includes a first convex portion assembly 5, and the first convex portion assembly 5 is arranged around the outer periphery of the first sealing portion 2. The first convex portion assembly 5 includes a plurality of first convex grains 50 spaced apart from each other. In Figure 1 In the illustrated embodiment, the first convex portion assembly 5 can be arranged at intervals along the extending direction of the first sealing portion 2 to form multiple rows of the first convex portion assembly 5, and the present application does not limit this. By providing a plurality of first convex grains 50, the locking strength between the seal and the liquid injection hole 101 can be increased, preventing the seal from falling off due to vibration or other reasons. By improving the sealing performance, the reliability and safety of the single battery 100 can be enhanced.

[0044] In some embodiments, the seal includes a second convex portion assembly 6, and the second convex portion assembly 6 is arranged around the outer periphery of the second sealing portion 3. The second convex portion assembly 6 includes a plurality of second convex grains 60 spaced apart from each other. Figure 1 In the illustrated embodiment, the second convex portion assembly 6 can be arranged at intervals along the extending direction of the second sealing portion 3 to form multiple rows of the second convex portion assembly 6, and the present application does not limit this. By providing a plurality of second convex grains 60, the locking strength between the seal and the liquid injection hole 101 can be increased, preventing the seal from falling off due to vibration or other reasons. By enhancing the sealing performance, the reliability and safety of the single battery 100 can be improved.

[0045] In some embodiments, the shape of the first protrusion 50 is one of a spherical shape, a conical shape, and a cylindrical shape. The shape of the second protrusion 60 is one of a spherical shape, a conical shape, and a cylindrical shape. Providing the first protrusion 50 and the second protrusion 60 with a conical shape having a smaller contact tip can provide a more concentrated locking force to increase the tightness and stability between the seal and the liquid injection hole 101. Providing the first protrusion 50 and the second protrusion 60 with a cylindrical shape can increase the contact area with the liquid injection hole 101, improve the sealing performance, and increase the tightness and stability between the seal and the liquid injection hole 101. Providing the first protrusion 50 and the second protrusion 60 with a spherical shape can reduce wear and increase the number of uses of the seal, as Figure 1 shown. The most suitable shapes of the first protrusion 50 and the second protrusion 60 can be determined according to specific conditions such as sealing requirements and vibrations to improve the locking strength between the seal and the liquid injection hole 101 and enhance the reliability and safety of the single cell 100.

[0046] Figure 3 and Figure 4 In the embodiments shown in

[0047] and Figure 1 and Figure 7 shown, the seal and the liquid injection hole 101 are in interference fit, which can increase the contact area and tightness between the seal and the liquid injection hole 101, thereby improving the sealing performance of the seal and avoiding or eliminating the possibility of leakage of air. In some embodiments, the seal has a first direction X, and the first direction X intersects the axis of the main body 1. The first protrusion assembly 5 has a minimum outer diameter D1 mm in the first direction X, and the maximum size of the liquid injection hole 101 is d mm, satisfying: 0.05 ≤ (D1 - d) / d ≤ 0.1. By defining the ratio range of the minimum outer diameter D1 of the first protrusion assembly 5 in the first direction X to the maximum size d of the liquid injection hole 101, the tightness of the interference fit can be controlled. When the minimum outer diameter D1 of the first protrusion assembly 5 in the first direction X and the maximum size d of the liquid injection hole 101 satisfy 0.05 ≤ (D1 - d) / d ≤ 0.1, a certain assembly gap can be allowed between the seal and the liquid injection hole 101, which can not only ensure that the seal can be easily inserted into the liquid injection hole 101, but also provide an appropriate interference fit effect to avoid difficult assembly or damage to the seal due to excessive tightness of the interference fit.

[0048] In Figure 1 and Figure 7In the illustrated embodiment, the seal has a first direction X, and the first direction X intersects the axis of the main body 1; the second sealing portion 3 has a minimum outer diameter D2 mm in the first direction X, and the maximum dimension of the liquid injection hole 101 is d mm, satisfying: 0.05 ≤ (D2 - d) / d ≤ 0.1. By defining the ratio range of the minimum outer diameter D2 of the second convex portion assembly 6 in the first direction X to the maximum dimension d of the liquid injection hole 101, the tightness of the interference fit can be controlled. When the minimum outer diameter D2 of the second convex portion assembly 6 in the first direction X and the maximum dimension d of the liquid injection hole 101 satisfy 0.05 ≤ (D2 - d) / d ≤ 0.1, a certain assembly gap can be allowed between the seal and the liquid injection hole 101, which can not only ensure that the seal can be easily inserted into the liquid injection hole 101, but also provide an appropriate interference fit effect to avoid difficult assembly or seal damage caused by excessive tightness of the interference fit.

[0049] In some embodiments, a reinforcing member (not shown in the figure) is wrapped inside the seal, and the reinforcing member extends along the axis of the main body 1.

[0050] The outside of the seal can be an injection-molded part, and the reinforcing member can be a hard material such as metal. By providing the reinforcing member, the overall structural strength of the seal can be improved. During the process of inserting and removing the seal, the seal can be prevented from breaking.

[0051] In some embodiments, the first sealing portion 2 includes a connected first body 20 and a first guiding head 21, and the first guiding head 21 is located on the side of the first body 20 away from the main body 1. The second sealing portion 3 includes a connected second body 30 and a second guiding head 31, and the second guiding head 31 is located on the side of the second body 30 away from the main body 1. The first guiding head 21 and the second guiding head 31 have smooth curved surfaces to provide a certain guiding function. By providing the smooth curved surfaces, the seal can be correctly inserted into the liquid injection hole 101, reducing stress concentration and damage caused by inaccurate alignment or misalignment.

[0052] In some embodiments, the first body 20 includes a first end 200 connected to the main body 1 and a second end 201 connected to the first guiding head 21; from the first end 200 to the second end 201, the outer diameter of the first body 20 decreases. The second body 30 includes a third end 300 connected to the main body 1 and a fourth end 301 connected to the second guiding head 31; from the third end 300 to the fourth end 301, the outer diameter of the second body 30 decreases. With such a setting, the first guiding head 21 or the second guiding head 31 can be more easily inserted into the liquid injection hole 101 during the assembly process, and the assembly gap between the seal and the liquid injection hole 101 is increased, thereby simplifying the assembly process, reducing the resistance and friction during assembly, and improving the assembly accuracy and efficiency.

[0053] In some embodiments, the axis of the main body portion 1, the axis of the first sealing portion 2, and the axis of the second sealing portion 3 coincide with each other. By arranging the first sealing portion 2 and the second sealing portion 3 to be collinear with the axis of the main body portion 1, the angle during assembly by the operator or the robotic arm is ensured to be accurate, making the insertion process of the seal more stable and precise, avoiding the risk of seal failure caused by incorrect insertion angles, and improving production efficiency.

[0054] In some embodiments, the main body portion 1, the first sealing portion 2, and the second sealing portion 3 are of an integral structure. The material of the seal is one of ethylene propylene diene monomer (EPDM) rubber and fluororubber. The seal can also be composed of other corrosion-resistant flexible materials to improve the strength, durability, and corrosion resistance of the seal. This application does not limit this. In the embodiments of this application, soft materials resistant to electrolyte corrosion such as EPDM rubber or fluororubber can be melted and then placed in a mold to cool and form. With such an arrangement, the process is simple and the production efficiency can be effectively improved.

[0055] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] The above has introduced in detail a seal provided by the embodiments of this application, and specific examples have been used to elaborate on the principle and implementation manner of this application. The descriptions of the above embodiments are only used to help understand the technical solution and its core idea of this application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A seal for sealing a liquid injection hole of a single battery, characterized in that: include: Main body; a first sealing portion, the first sealing portion being connected to the main body portion; a second sealing portion, the second sealing portion being arranged at a side of the main body away from the first sealing portion and connected to the main body, the first sealing portion and the second sealing portion being used to seal the injection hole; An identification portion, wherein the identification portion is used to indicate the first sealing portion.

2. The seal according to claim 1, characterized in that The identification portion is disposed on the main body portion, and a distance L1 between the identification portion and the first sealing portion is smaller than a distance L2 between the identification portion and the second sealing portion.

3. The seal according to claim 2, characterized in that The identification portion is a groove, and the groove is arranged around the circumference of the main body.

4. The seal according to claim 2, characterized in that The identification portion is a raised structure, and the raised structure is arranged around the circumference of the main body.

5. The seal according to claim 1, characterized in that The sealing element comprises: A first convex component is arranged around the outer periphery of the first sealing portion, and the first convex component includes a plurality of first convex particles spaced apart from each other; And / or, a second protrusion assembly is arranged around the outer circumference of the second sealing portion, and the second protrusion assembly includes a plurality of second protrusions spaced apart from each other.

6. The seal according to claim 5, characterized in that The shape of the first protrusion is one of spherical, conical and cylindrical; The second protrusion has a shape of one of a sphere, a cone, and a cylinder.

7. The seal according to claim 1, characterized in that A reinforcing member is wrapped inside the sealing member, and the reinforcing member is extended along the axis of the main body.

8. The seal according to claim 1, characterized in that The first sealing portion includes a first body and a first guide head connected to each other, and the first guide head is located at a side of the first body away from the main body; The second sealing portion includes a second body and a second guide head connected to each other, and the second guide head is located at a side of the second body away from the main body.

9. The seal according to claim 8, characterized in that The first body comprises a first end connected to the main body and a second end connected to the first guide head; the outer diameter of the first body decreases from the first end to the second end; The second body includes a third end connected to the main body and a fourth end connected to the second guide head; the outer diameter of the second body decreases from the third end to the fourth end.

10. The seal according to claim 1, characterized in that The axis of the main body, the axis of the first sealing portion, and the axis of the second sealing portion coincide with each other.

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