Battery cap to prevent oxidation corrosion

Abstract

The utility model discloses a battery cap of preventing oxidation corrosion relates to battery cap technical field, the utility model discloses a outer tube, fixed disc no.

Description

Technical Field

[0001] This utility model belongs to the field of battery cap technology, and in particular relates to a battery cap that prevents oxidation and corrosion. Background Technology

[0002] The battery cap is a sophisticated composite safety system. It acts as the positive terminal of the battery, responsible for current conduction, and works in conjunction with a sealing ring through laser welding to ensure the battery's airtightness. Sealing the lithium battery cap is a crucial manufacturing process, its core purpose being to ensure the battery's safety, lifespan, and performance by forming a fully sealed system. This sealing system relies primarily on two key elements: first, an engineering plastic sealing ring as an insulating component, typically made of corrosion-resistant polypropylene or polyphenylene sulfide; and second, a laser welding process that uses a high-energy laser to instantly fuse the battery's metal cap to the casing. During this process, the sealing ring, tightly compressed between the metal parts, achieves effective physical isolation. However, battery caps still have the following drawbacks in practical use: When traditional battery caps are pressed into the battery steel shell, the steel shell is directly pressed into the cap, and the cap is directly pushed to the corresponding position of the sealing structure. The steel shell may directly impact or excessively compress the internal sealing structure or vent valve, causing it to bend, be damaged, or fail to seal. Secondly, batteries produce gas during charging, discharging, or abnormal conditions (such as overheating), which increases internal pressure. Traditional battery caps may not be able to safely release these gases while ensuring the long-term sealing of the battery, posing a risk of bulging or even explosion. On the other hand, simple pressure relief devices may sacrifice sealing, allowing external contaminants to enter. Utility Model Content

[0003] The purpose of this utility model is to provide a battery cap that prevents oxidation and corrosion. By setting an outer cylinder, a first fixing plate, a second fixing plate, and a sealing component, it solves the problems that the internal structure of the battery cap is easily damaged by the pressure of the battery steel shell during installation, and that the internal pressure of the battery is not safely released and the structural sealing is not good enough.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a battery cap for preventing oxidation and corrosion, comprising an outer cylinder, a first fixing plate, a second fixing plate, and a sealing assembly. The first fixing plate is fixed to the upper inner part of the outer cylinder, and a limiting groove is fixed on the inner wall of the outer cylinder above the first fixing plate. The second fixing plate is fixed on the inner wall of the outer cylinder below the first fixing plate. The sealing assembly is fixed to the bottom of the outer cylinder. The sealing assembly includes a connecting cap, an outer sealing plate, and a one-way breathable filter element. The connecting cap is fixed to the bottom of the outer cylinder, and the outer sealing plate is fixed to the lower inner part of the connecting cap. A one-way breathable filter element is vertically fixed through the center of the outer sealing plate. The first fixing plate, the second fixing plate, and the sealing assembly are fixed from top to bottom inside the outer cylinder. A limiting groove is provided above the first fixing plate for positioning the battery steel shell. The sealing assembly at the bottom of the outer cylinder is connected to the outer cylinder through the connecting cap. The outer sealing plate and the one-way breathable filter element inside it enable one-way gas discharge.

[0005] Furthermore, two sealing rings are fixed to the lower inner part of the outer cylinder. The two sealing rings are respectively fixed to the edges of the top and bottom of the second fixed disk. The lower inner part of the outer cylinder is provided with two sealing rings, which are located at the top and bottom edges of the second fixed disk, respectively, to enhance the sealing between the second fixed disk and the outer cylinder.

[0006] Furthermore, a fixing ring is fixed on the inner wall of the outer cylinder between the limiting groove and the sealing ring. The fixing ring is fixed on the circumference of the fixing disk one. The fixing ring is fixed on the inner wall of the outer cylinder between the limiting groove and the sealing ring. The fixing ring surrounds the fixing disk one around one side to enhance the connection strength between the fixing disk one and the outer cylinder.

[0007] Furthermore, a vent hole is vertically fixed inside the first fixed disk, and a sealing sleeve is fixed outside the vent hole at the bottom of the first fixed disk. The bottom end of the sealing sleeve is fixed to the top end of the second fixed disk. The first fixed disk has a through vent hole, and a sealing sleeve is installed outside the vent hole at its bottom end. The bottom end of the sealing sleeve is fixed to the top end of the second fixed disk, which is used to guide the gas inside the battery downward and keep it sealed.

[0008] Furthermore, a fixed cylinder is vertically fixed inside the fixed disk II, and a one-way vent valve is fixed on the inner wall of the fixed cylinder. The fixed disk II has a fixed cylinder, and the fixed cylinder is equipped with a one-way vent valve, which is used to control the one-way flow of gas inside the battery into the sealed assembly.

[0009] Furthermore, the sealing assembly also includes a fixing protrusion ring and a filter membrane. The top of the connecting cap is fixed with a fixing protrusion ring, and the inner ring of the fixing protrusion ring is fixed with a filter membrane. The top of the connecting cap of the sealing assembly is provided with a fixing protrusion ring, and the fixing protrusion ring is equipped with a filter membrane for filtering the gas discharged from the battery, which is then discharged through a one-way breathable filter element to prevent external air from entering.

[0010] This utility model has the following beneficial effects: This utility model solves the problem of the internal structure of the battery cap being easily damaged by the pressure of the battery steel shell during installation by setting an outer cylinder. When it is necessary to install the outer cylinder on the battery steel shell, first align the end of the outer cylinder away from the sealing component with the open end of the battery steel shell, then put the outer cylinder on the top of the battery steel shell. After the battery steel shell is pressed into the outer cylinder, it enters the limiting groove inside the outer cylinder to restrict its position, preventing the battery steel shell from pressing on the fixing plate and causing deformation, thus ensuring the stability of the installation.

[0011] This invention solves the problems of insufficient pressure release and structural sealing of the battery cap by setting up an outer cylinder, a first fixed plate, a second fixed plate, and a sealing assembly. The gas generated inside the battery steel shell is transported to the outer cylinder, then to the first fixed plate, and then to the second fixed plate through the vent hole on the first fixed plate. From there, the gas is transported to the fixed cylinder. The one-way vent valve inside the fixed cylinder allows the gas inside the battery steel shell to pass through to the bottom of the second fixed plate. After passing through the filter membrane, the gas is vented through the one-way vent filter on the outer sealing plate. The one-way vent filter also prevents the battery from being oxidized by contact with air during operation, thus improving the oxidation resistance of the battery cap. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A three-dimensional view of the structure of a battery cap that prevents oxidation and corrosion, after being cut open. Figure 2 This is a three-dimensional view of the outer cylinder section after it has been cut open. Figure 3 A three-dimensional view of the structure after a section of the fixing disk has been cut open. Figure 4 This is a three-dimensional structural view of fixed disk two; Figure 5 A three-dimensional view of the structure of the enclosed component after it has been partially cut open. Figure 6 This is a three-dimensional view of a battery cap assembly structure designed to prevent oxidation and corrosion.

[0014] Figure label: 1. Outer cylinder; 101. Limiting groove; 102. Fixing ring; 103. Sealing ring; 2. Fixing disc one; 201. Vent hole; 202. Sealing sleeve; 3. Fixing disc two; 301. Fixing cylinder; 302. One-way vent valve; 4. Sealing assembly; 401. Connecting cap; 402. Fixing protrusion ring; 403. Filter membrane; 404. Outer sealing disc; 405. One-way vent filter element. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0016] Please see Figure 1-2 This utility model is a battery cap to prevent oxidation and corrosion, including an outer cylinder 1, a first fixing plate 2, a second fixing plate 3, and a sealing assembly 4. The first fixing plate 2 is fixed to the upper inner part of the outer cylinder 1. During operation, the outer cylinder 1 is sleeved with the battery steel shell. The first fixing plate 2 initially separates the internal structure of the battery from the second fixing plate 3. A limiting groove 101 is fixed on the inner wall of the outer cylinder 1 above the first fixing plate 2. The limiting groove 101 limits the entry of the battery steel shell into the outer cylinder 1. The second fixing plate 3 is fixed on the inner wall of the outer cylinder 1 below the first fixing plate 2. The second fixing plate 3 further seals the outer cylinder 1 and the battery steel shell. The structure includes a sealing component 4 fixed at the bottom of the outer cylinder 1. The sealing component 4 includes a connecting cap 401, an outer sealing plate 404, and a one-way breathable filter element 405. The connecting cap 401 is fixed at the bottom of the outer cylinder 1. The outer sealing plate 404 is fixed in the lower part of the connecting cap 401. The one-way breathable filter element 405 is vertically fixed in the center of the outer sealing plate 404. When the sealing component 4 is working, the outer cylinder 1 and the outer sealing plate 404 are connected through the connecting cap 401. The one-way breathable filter element 405 is connected to the connecting cap 401 through the outer sealing plate 404. The gas generated in the battery is unidirectionally breathed out through the one-way breathable filter element 405.

[0017] Specifically, two sealing rings 103 are fixed to the lower inner part of the outer cylinder 1. The two sealing rings 103 are fixed to the edges of the top and bottom of the fixed disk 2 3 respectively. The outer cylinder 1 seals the top and bottom of the fixed disk 2 3 through the sealing rings 103.

[0018] Furthermore, a fixing ring 102 is fixed on the inner wall of the outer cylinder 1 between the limiting groove 101 and the sealing ring 103. The fixing ring 102 is fixed on the periphery of the fixing plate 2. The limiting groove 101 will increase the connection strength between the fixing plate 2 and the inner wall of the outer cylinder 1 through the fixing ring 102.

[0019] The operation process of this embodiment is as follows: When it is necessary to install the outer cylinder 1 on the battery steel shell, first align the end of the outer cylinder 1 away from the sealing component 4 with the end of the battery steel shell that is open. Then, after the outer cylinder 1 is put on the top of the battery steel shell, the battery steel shell is pressed into the outer cylinder 1 and enters the limiting groove 101 inside the outer cylinder 1 to limit its position and prevent the battery steel shell from pressing onto the fixing plate 2 and causing deformation. Specific Implementation Example 2

[0020] Please see Figure 1-6 Based on the first specific embodiment, a vent hole 201 is vertically fixed inside the fixed disk 2. A sealing sleeve 202 is fixed outside the vent hole 201 at the bottom of the fixed disk 2. The bottom end of the sealing sleeve 202 is fixed to the top end of the fixed disk 3. The fixed disk 2 delivers the air generated inside the battery steel shell to the sealing sleeve 202 through the vent hole 201 and then to the fixed cylinder 301.

[0021] Specifically, a fixed cylinder 301 is vertically fixed inside the fixed disk 2 3. A one-way vent valve 302 is fixed on the inner wall of the fixed cylinder 301. The one-way vent valve 302 is connected to the fixed disk 2 3 through the fixed cylinder 301. The gas generated inside the battery steel shell is transported to the filter membrane 403 through the one-way vent valve 302. After being filtered by the filter membrane 403, the gas is transported to the connecting cap 401.

[0022] Furthermore, the sealing assembly 4 also includes a fixing protrusion ring 402 and a filter membrane 403. The top of the connecting cap 401 is fixed with the fixing protrusion ring 402, and the inner ring of the fixing protrusion ring 402 is fixed with the filter membrane 403. The sealing assembly 4 is connected to the filter membrane 403 through the fixing protrusion ring 402. The filtered gas inside the battery is discharged into the connecting cap 401 through the filter membrane 403 and discharged through the one-way breathable filter element 405.

[0023] The operation process of this embodiment is as follows: During operation, the gas generated inside the battery steel shell is transported to the outer cylinder 1, and then to the fixed plate 2 through the outer cylinder 1. It is then transported to the fixed plate 3 through the vent hole 201 on the fixed plate 2, and then to the fixed cylinder 301 through the fixed plate 3. The gas inside the battery steel shell is released through the one-way vent valve 302 in the fixed cylinder 301 to the bottom of the fixed plate 3. After passing through the filter membrane 403, the gas is vented through the one-way vent filter element 405 on the outer sealing plate 404. The one-way vent filter element 405 prevents the battery from being oxidized by contact with air during operation, thus improving the anti-oxidation performance of the battery cap.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A battery cap for preventing oxidation and corrosion, comprising an outer cylinder (1), a first fixing disk (2), a second fixing disk (3), and a sealing assembly (4), characterized in that: The upper inner part of the outer cylinder (1) is fixed with a first fixing plate (2). A limiting groove (101) is fixed on the inner wall of the outer cylinder (1) above the first fixing plate (2). A second fixing plate (3) is fixed on the inner wall of the outer cylinder (1) below the first fixing plate (2). A sealing component (4) is fixed at the bottom of the outer cylinder (1). The sealing component (4) includes a connecting cap (401), an outer sealing plate (404), and a one-way breathable filter element (405). The bottom of the outer cylinder (1) is fixed with a connecting cap (401). The lower part of the connecting cap (401) is fixed with an outer sealing plate (404). A one-way breathable filter element (405) is vertically fixed in the center of the outer sealing plate (404).

2. The battery cap for preventing oxidation and corrosion according to claim 1, characterized in that: Two sealing rings (103) are fixed to the lower inner part of the outer cylinder (1), and the two sealing rings (103) are respectively fixed to the edges of the top and bottom of the fixed disk (3).

3. A battery cap for preventing oxidation and corrosion according to claim 1, characterized in that: A fixing ring (102) is fixed on the inner wall of the outer cylinder (1) between the limiting groove (101) and the sealing ring (103), and the fixing ring (102) is fixed on the periphery of the fixing disk (2).

4. A battery cap for preventing oxidation and corrosion according to claim 1, characterized in that: A vent hole (201) is vertically fixed inside the fixed plate one (2). A sealing sleeve (202) is fixed outside the vent hole (201) at the bottom of the fixed plate one (2). The bottom end of the sealing sleeve (202) is fixed to the top end of the fixed plate two (3).

5. A battery cap for preventing oxidation and corrosion according to claim 1, characterized in that: A fixed cylinder (301) is vertically fixed inside the fixed plate 2 (3), and a one-way vent valve (302) is fixed on the inner wall of the fixed cylinder (301).

6. A battery cap for preventing oxidation and corrosion according to claim 1, characterized in that: The sealing assembly (4) further includes a fixing ring (402) and a filter membrane (403). The top end of the connecting cap (401) is fixed with the fixing ring (402), and the inner ring of the fixing ring (402) is fixed with the filter membrane (403).

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