A reusable lithium battery sealant

Abstract

A reusable lithium battery sealing nail, belonging to the field of lithium battery manufacturing technology, includes a rotation adjustment mechanism, a spring-loaded internal support mechanism, and a sealing plug. The rotation adjustment mechanism adjusts the extension and retraction of the spring-loaded internal support mechanism, internally supporting the nail-like structure of the sealing plug, thereby effectively sealing the lithium battery injection hole. Furthermore, the internal support for the nail-like structure can be eliminated, allowing the sealing plug to be removed from the injection hole, enabling multiple reuses and reducing production costs. Finally, the lithium battery sealing nail provided in this application has a simple structure and is easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically to a reusable lithium battery sealing nail. Background Technology

[0002] In the lithium battery manufacturing process, after the first electrolyte filling, the lithium battery needs to undergo processes such as high-temperature wetting and pre-charging to ensure sufficient electrolyte wetting. After the above processes are completed, a second electrolyte replenishment is required. Before the second electrolyte replenishment is completed, the electrolyte filling port on the lithium battery cannot be sealed.

[0003] During the process between the primary and secondary electrolyte filling stages, it is crucial to prevent moisture and foreign matter from entering the battery. Therefore, the traditional method uses sealing rubber staples for temporary sealing, which are removed before the secondary electrolyte filling. However, in practical applications, controlling the size of the rubber material is difficult. If the size is too large, the staples are difficult to insert, and friction during insertion can introduce foreign matter. If the size is too small, they are prone to falling out and allowing moisture to enter. This leads to defects such as water absorption and lithium deposition, resulting in product scrap. Furthermore, the used rubber staples are subject to dimensional changes due to compression and electrolyte contamination, making them unusable and typically disposable, significantly increasing battery manufacturing costs. Utility Model Content

[0004] To solve the sealing problem of the injection hole before secondary electrolyte injection in lithium batteries, improve yield, and reduce manufacturing costs, this utility model provides a reusable lithium battery sealing nail.

[0005] A reusable lithium battery sealing nail includes: a rotation adjustment mechanism, a spring-loaded internal support mechanism, and a sealing plug; one end of the sealing plug is a nail-shaped structure with a hollow interior, which is inserted into the electrolyte filling hole of the lithium battery; the spring-loaded internal support mechanism is disposed inside the sealing plug and extends and retracts in the hollow position of the nail-shaped structure, causing the nail-shaped structure to expand after being supported internally; the rotation adjustment mechanism is disposed at the other end of the sealing plug and controls the extension and retraction of the spring-loaded internal support mechanism within the nail-shaped structure by compression.

[0006] Preferably, the sealing plug is made of a corrosion-resistant elastic material, and the inner wall of the sealing plug is provided with an annular groove, and the rotation adjustment mechanism is engaged in the annular groove.

[0007] Preferably, one end of the rotation adjustment mechanism is a clamping cap, and the other end is a spiral-shaped extrusion plate; the rotation adjustment mechanism is provided with an annular protrusion, which is disposed in the annular groove; the extrusion plate is correspondingly disposed with the spring-loaded inner support mechanism.

[0008] Preferably, one end of the spring-loaded internal support mechanism is an internal support column with a spring sleeved on it; the other end is a spiral-shaped pressure plate; the pressure plate is correspondingly arranged with the extrusion plate, and when the extrusion plate rotates, it propels the spring-loaded internal support mechanism to move, and the internal support column expands the internal support of the nail-like structure.

[0009] Preferably, the diameter of the inner support column exceeds the hollow diameter of the nail-like structure.

[0010] Preferably, the rotation adjustment mechanism and the spring-loaded inner support mechanism are made of POM wear-resistant material and are injection molded.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] The technical solution provided by this utility model includes: a rotation adjustment mechanism, a spring-loaded internal support mechanism, and a sealing plug; the rotation adjustment mechanism adjusts the extension and retraction of the spring-loaded internal support mechanism to internally support the nail-like structure of the sealing plug, thereby achieving effective sealing of the lithium battery injection hole; in addition, the internal support for the nail-like structure can be eliminated, and the sealing plug can be removed from the injection hole, enabling multiple reuses and reducing production costs; finally, the lithium battery sealing nail structure provided by this application is simple and easy to operate. Attached Figure Description

[0013] Figure 1 This is an exploded schematic diagram of the lithium battery sealing nail in this utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of the lithium battery sealing nail in this utility model;

[0015] Figure 3 This is a schematic diagram of the telescopic extension and retraction of the spring-loaded internal support mechanism in this utility model;

[0016] Among them, 1-rotation adjustment mechanism; 2-spring-back internal support mechanism; 3-sealing plug; 101-clamping cap; 102-compression plate; 103-annular protrusion; 201-internal support column; 202-spring; 203-pressure plate; 301-nail structure; 302-annular groove. Detailed Implementation

[0017] To better understand this utility model, the following description, in conjunction with the accompanying drawings and examples, will further illustrate its contents.

[0018] A reusable lithium battery sealant nail, the exploded view of which is shown below. Figure 1 As shown in the schematic cross-sectional view Figure 2As shown, it includes: a rotation adjustment mechanism 1, a spring-loaded internal support mechanism 2, and a sealing plug 3; one end of the sealing plug 3 is a nail-shaped structure 301, hollow inside, elastic, and inserted into the liquid injection hole of the lithium battery; the sealing plug has a cylindrical mounting cavity, the spring-loaded internal support mechanism 2 is disposed inside the sealing plug 3, and extends and retracts in the hollow position of the nail-shaped structure 301. When the spring-loaded internal support mechanism extends to the hollow position of the nail-shaped structure 301, the nail-shaped structure 301 expands after being supported internally, thereby completely blocking and sealing the liquid injection hole; the rotation adjustment mechanism 1 is disposed at the other end of the sealing plug 3, and controls the extension and retraction of the spring-loaded internal support mechanism 2 within the nail-shaped structure 301 by compression.

[0019] The sealing plug 3 is made of corrosion-resistant elastic material. The inner sidewall of the sealing plug 3 is provided with an annular groove 302. The rotation adjustment mechanism 1 is engaged in the annular groove 302 and can rotate.

[0020] One end of the rotation adjustment mechanism 1 is a clamping cap 101, which is used to operate the rotation adjustment mechanism 1 to rotate; the other end is a spiral-shaped extrusion plate 102, such as... Figure 1 The structure shown in the figure; the rotation adjustment mechanism 1 is provided with an annular protrusion 103, which is disposed in the annular groove 302; the extrusion plate 102 is correspondingly disposed with the spring-loaded inner support mechanism 2.

[0021] The spring-loaded internal support mechanism 2 has an internal support column 201 at one end, on which a spring 202 is fitted; the other end is a spiral-shaped pressure plate 203, such as... Figure 1 The structure shown is as follows: the pressure plate 203 is correspondingly arranged with the extrusion plate 102. When the extrusion plate 102 rotates, it pushes the spring-loaded inner support mechanism 2 to move, the spring 202 is compressed, and the inner support column 201 expands the internal support of the nail-shaped structure 301. At this time, the state is as follows. Figure 3 As shown. When the rotation adjustment mechanism 1 rotates, the spring 202 resets the spring-loaded inner support mechanism 2, and the inner support column 201 retracts from the hollow position of the nail-shaped structure 301. Without the inner support, the nail-shaped structure 301 softens and can be removed from the lithium battery's injection hole. At this time, its state is as follows. Figure 2 As shown.

[0022] The diameter of the inner support column 201 exceeds the hollow diameter of the nail-shaped structure 301, ensuring that the nail-shaped structure 301 can be effectively supported.

[0023] The rotation adjustment mechanism 1 and the spring-loaded inner support mechanism 2 are made of POM wear-resistant material and are injection molded.

[0024] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A reusable lithium battery sealant nail, characterized by, The sealing nail includes: a rotation adjustment mechanism (1), a spring-loaded inner support mechanism (2), and a sealing plug (3); One end of the sealing plug (3) is a nail-shaped structure (301) with a hollow interior, which is inserted into the liquid injection hole of the lithium battery; the spring-loaded internal support mechanism (2) is located inside the sealing plug (3) and extends and retracts in the hollow position of the nail-shaped structure (301), and the nail-shaped structure (301) expands after being supported internally; the rotation adjustment mechanism (1) is located at the other end of the sealing plug (3) and controls the extension and retraction of the spring-loaded internal support mechanism (2) in the nail-shaped structure (301) by squeezing.

2. A reusable lithium battery sealant stud as defined in claim 1, wherein, The sealing plug (3) is made of corrosion-resistant elastic material. The inner wall of the sealing plug (3) is provided with an annular groove (302), and the rotation adjustment mechanism (1) is engaged in the annular groove (302).

3. The reusable lithium battery sealing nail as described in claim 2, characterized in that, The rotation adjustment mechanism (1) has a clamping cap (101) at one end and a spiral-shaped extrusion plate (102) at the other end; The rotation adjustment mechanism (1) is provided with an annular protrusion (103), which is located in the annular groove (302); the extrusion plate (102) is correspondingly provided with the spring-loaded inner support mechanism (2).

4. The reusable lithium battery sealing nail as described in claim 3, characterized in that, The spring-loaded internal support mechanism (2) has an internal support column (201) at one end, on which a spring (202) is fitted; and a spiral-shaped pressure plate (203) at the other end. The pressure plate (203) is correspondingly arranged with the extrusion plate (102). When the extrusion plate (102) rotates, it propels the spring-loaded inner support mechanism (2) to move, and the inner support column (201) expands the internal support of the nail-shaped structure (301).

5. A reusable lithium battery sealing nail as described in claim 4, characterized in that, The diameter of the inner support column (201) exceeds the hollow diameter of the nail-like structure (301).

6. The reusable lithium battery sealing nail as described in claim 4, characterized in that, The rotation adjustment mechanism (1) and the spring-loaded inner support mechanism (2) are made of POM wear-resistant material and are injection molded.

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