Structure for sealing and welding sealing nail
By optimizing the interference fit sealing ring and triangular bevel welding structure of the sealing pin, the problem of poor weld between the sealing pin and the injection port was solved, resulting in a higher welding yield and improved stability of the injection port.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中汽新能(滁州)电池科技有限公司
- Filing Date
- 2025-02-08
- Publication Date
- 2026-05-12
AI Technical Summary
The existing gap welding method between the sealing nail and the injection port is easily affected by electrolyte contaminants, resulting in a high welding failure rate and difficulty in secondary repair. It also requires a large welding energy, which affects the stability of the injection port sealing structure.
The design employs an interference fit sealing ring and a triangular bevel welding structure, combined with the design of grooves and vertical slots, to optimize the welding method, reduce welding difficulty, and simplify the rework process.
It reduces the adverse effects of electrolyte contamination on welding, improves welding yield, ensures the stability and firmness of the injection port, and simplifies secondary welding operations.
Smart Images
Figure CN224232899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing nail technology, specifically to the structure of a sealing nail for sealing welding. Background Technology
[0002] The existing sealing pin and injection port are welded using a slit welding method, which involves welding the gap between the sealing pin and the injection port. However, due to the presence of electrolyte contaminants at the injection port, welding spalls and other adverse effects are prone to occur. Furthermore, the slit welding method is easily affected by the size of the gap between the sealing pin and the injection port. To ensure weld strength, it is necessary to increase the welding energy, which can easily affect the sealing structure of the injection port. Moreover, if a weld defect occurs using this method, it is not convenient to perform secondary welding, and the rework process is quite troublesome. Utility Model Content
[0003] The purpose of this invention is to provide a structure for sealing welded nails to address the aforementioned shortcomings in the prior art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a structure for a sealing welded nail, comprising a top cover plate, wherein a liquid injection port is provided on the top cover plate, the liquid injection port being divided into a frustum section and a cylindrical section, a sealing nail being inserted into the liquid injection port, the sealing nail being divided into a sealing cap and a sealing nail body, the sealing nail body being inserted into the cylindrical section of the liquid injection port, the sealing cap being snapped into the frustum section, the top of the sealing cap extending outward and mounted on the top surface of the top cover plate, and a groove being provided on the top surface of the top cover plate outside the weld between the sealing cap and the top cover plate.
[0005] Furthermore, the sealing nail body is divided into a nail head and a nail rod. The top of the nail rod is fixedly connected to the bottom of the sealing cover, and the top of the nail head is fixedly connected to the bottom of the nail rod. A ring is fixedly sleeved on the outer side of the middle part of the nail rod, and a first sealing ring is provided between the ring and the top of the nail head and sleeved on the nail rod.
[0006] Furthermore, an annular groove is provided on the side of the ring, and a second sealing ring is provided in the annular groove and sleeved on the outside of the ring.
[0007] Furthermore, both the first and second sealing rings are interference-fitted with the injection port.
[0008] Furthermore, a triangular bevel is provided at the corner where the outer side of the sealing cover contacts the top surface of the top cover plate.
[0009] Furthermore, a vertical groove is formed on the top surface of the sealing cover.
[0010] In the above technical solution, the structure of the sealing weld nail provided by this utility model has the following beneficial effects:
[0011] This invention optimizes the welding method of the electrolyte injection port of the battery cell, reduces electrolyte contamination at the injection port and the adverse effects of the injection port gap size on the sealing welding, reduces welding difficulty, improves welding yield and simplifies rework, and ensures the stability and firmness of the injection port welding.
[0012] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.
[0013] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0015] Figure 1 A structural schematic diagram provided for an embodiment of this utility model;
[0016] Figure 2 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle;
[0017] Figure 3 Provided for the embodiments of this utility model Figure 1 Enlarged view of section B in the middle.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Top cover plate; 11. Groove; 12. Injection port; 2. Sealing cap; 3. Nail; 21. Vertical groove; 22. Triangular bevel; 3. Sealing nail body; 31. Nail head; 32. Nail rod; 33. Ring; 331. Ring groove; 4. First sealing ring; 5. Second sealing ring. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0021] Please see Figures 1 to 3A sealing weld nail structure includes a top cover plate 1, on which a liquid injection port 12 is provided. The liquid injection port 12 is divided into a frustum section and a cylindrical section. A sealing nail is inserted into the liquid injection port 12. The sealing nail is divided into a sealing cap 2 and a sealing nail body 3. The sealing nail body 3 is inserted into the cylindrical section of the liquid injection port 12. The sealing cap 2 is snapped into the frustum section. The top of the sealing cap 2 extends outward and is mounted on the top surface of the top cover plate 1. A groove 11 is provided on the top surface of the top cover plate 1 outside the weld between the sealing cap 2 and the top cover plate 1.
[0022] For details, please refer to Figure 1 The top of the sealing cap 2 is mounted on the top cover plate 1. The area where the long side of the sealing cap 2 extends and the top surface of the top cover plate 1 is located is the welding area. A groove 11 is provided on the outside of the welding area to release welding internal stress during welding. Since the welding area is far away from the liquid injection port 12, the influence of welding heat on the sealing component inside the liquid injection port 12 can be effectively avoided. In case of welding defects, the pin can be pried open directly, the welding surface can be ground, and a second welding can be performed. This optimizes the current welding method of the liquid injection port 12 of the battery cell, reduces electrolyte contamination of the liquid injection port 12 and the adverse effects of the gap size of the liquid injection port 12 on the sealing welding, reduces welding difficulty, improves welding yield and simplifies rework, and ensures the stability and firmness of the welding of the liquid injection port 12.
[0023] Furthermore, the sealing nail body 3 is divided into a nail head 31 and a nail rod 32. The top of the nail rod 32 is fixedly connected to the bottom of the sealing cover 2, and the top of the nail head 31 is fixedly connected to the bottom of the nail rod 32. A ring 33 is fixedly sleeved on the outer side of the middle part of the nail rod 32. A first sealing ring 4 is provided between the ring 33 and the top of the nail head 31 and is sleeved on the nail rod 32. A ring groove 331 is provided on the side of the ring 33. A second sealing ring 5 is provided in the ring groove 331 and is sleeved on the outer side of the ring 33. The first sealing ring 4 and the second sealing ring 5 are both interference fit with the injection port 12.
[0024] Specifically, by clamping the first sealing ring 4 between the nail head 31 and the ring 33, the movement of the first sealing ring 4 in the vertical direction and its deformation are restricted, so that the deformation direction of the first sealing ring 4 is mainly in the horizontal direction. When the first sealing ring 4 is installed into the injection port 12 with an interference fit, its deformation is mainly manifested in the horizontal direction, resulting in a better sealing effect. The second sealing ring 5 also adopts an interference fit, and the second sealing ring 5 is located above the first sealing ring 4, the purpose of which is to further improve the sealing effect of the sealing nail.
[0025] Furthermore, a triangular bevel 22 is provided at the corner where the outer side of the sealing cover 2 contacts the top surface of the top cover plate 1.
[0026] Specifically, by creating a triangular bevel 22, the welding area between the top surface of the top cover plate 1 and the sealing cover 2 is increased, reducing the welding difficulty, increasing the welding strength, and reducing the welding defect rate.
[0027] Furthermore, a vertical groove 21 is provided on the top surface of the sealing cover 2.
[0028] Specifically, the vertical groove 21 consists of two vertical rectangular slots arranged side by side. When welding defects occur, the sealing cover 2 is lifted up, and pliers are inserted into the vertical groove 21 to pull out the sealing cover 2 and the sealing nail body 3, thus optimizing the nail removal method and improving the efficiency of secondary welding.
[0029] In this utility model, reference Figures 1 to 3 First, the first sealing ring 4 and the second sealing ring 5 are interference-fitted with the injection port 12 so that the sealing pin is inserted into the injection port 12. Due to the obstruction of the frustum section of the injection port 12 and the long side extending from the top of the sealing cover 2 being mounted on the top cover plate 1, the sealing pin is positioned. Next, the sealing cover 2 is welded to the top surface of the top cover plate 1 along the triangular inclined surface 22. Finally, the sealing performance of the sealing pin is tested. If it passes the test, the installation of the sealing pin is completed. If there is a welding defect, the sealing cover 2 is lifted up, and the sealing pin is clamped out by inserting pliers into the vertical groove 21. The welding area is then ground and reinstalled.
[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A structure for a sealing welded nail, comprising a top cover plate (1), characterized in that: The top cover plate (1) is provided with an injection port (12), which is divided into a frustum section and a cylindrical section. A sealing nail is inserted into the injection port (12), which is divided into a sealing cap (2) and a sealing nail body (3). The sealing nail body (3) is inserted into the cylindrical section of the injection port (12), and the sealing cap (2) is snapped into the frustum section. The top of the sealing cap (2) extends outward and is mounted on the top surface of the top cover plate (1). A groove (11) is provided on the top surface of the top cover plate (1) outside the weld between the sealing cap (2) and the top cover plate (1).
2. The structure of the sealing weld nail according to claim 1, characterized in that, The sealing nail body (3) is divided into a nail head (31) and a nail rod (32). The top of the nail rod (32) is fixedly connected to the bottom of the sealing cover (2), and the top of the nail head (31) is fixedly connected to the bottom of the nail rod (32). A ring (33) is fixedly sleeved on the outer side of the middle part of the nail rod (32). A first sealing ring (4) is provided between the ring (33) and the top of the nail head (31) and sleeved on the nail rod (32).
3. The structure of the sealing welded nail according to claim 2, characterized in that, The ring (33) has an annular groove (331) on its side, and a second sealing ring (5) is provided in the annular groove (331) and sleeved on the outside of the ring (33).
4. The structure of a sealing welded nail according to claim 3, characterized in that, Both the first sealing ring (4) and the second sealing ring (5) are interference fit with the injection port (12).
5. The structure of a sealing welded nail according to claim 1, characterized in that, A triangular bevel (22) is provided at the corner where the outer side of the sealing cover (2) contacts the top surface of the top cover plate (1).
6. The structure of a sealing welded nail according to claim 1, characterized in that, A vertical groove (21) is provided on the top surface of the sealing cover (2).