Structure for sealing and welding sealing nail

Abstract

The structure comprises a top cover plate, a liquid injection opening is formed in the top cover plate, the liquid injection opening is divided into a circular truncated cone section and a cylindrical section, the sealing nail is inserted into the liquid injection opening, the sealing nail is divided into a sealing cover and a sealing nail body, the sealing nail body is inserted into the cylindrical section of the liquid injection opening, and the sealing cover is arranged on the sealing nail body. The sealing cover is clamped in the circular truncated cone section, the top of the sealing cover extends outwards and is erected on the top face of the top cover plate, and a groove is formed in the position, located on the outer side of a welding seam of the sealing cover and the top cover plate, of the top face of the top cover plate. According to the invention, the welding mode of the battery cell liquid injection port is optimized, the electrolyte pollution of the liquid injection port and the adverse effect of the gap size of the liquid injection port on the sealing welding are reduced, the welding difficulty is reduced, the welding yield is improved, the rework operation is simplified, and the stability and firmness of the liquid injection port welding are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing nails, and in particular to a structure of a sealing welding sealing nail. Background Art

[0002] After the existing sealing pin is matched with the liquid injection port, the welding method is gap welding, that is, the gap between the sealing pin and the liquid injection port is welded. However, due to the influence of electrolyte contaminants and the like in the liquid injection port, adverse effects such as welding explosion points are prone to occur; in addition, its welding method is gap welding, which is easily affected by the size of the gap between the sealing pin and the liquid injection port. In order to meet the welding firmness, it is necessary to increase the welding energy, which is easy to affect the sealing structure of the liquid injection port. Moreover, if the welding is poor in this welding method, it is not convenient to perform secondary welding, and the rework process is more troublesome. Summary of the Invention

[0003] The object of the present invention is to provide a sealing welding nail structure to solve the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure for sealing and welding sealing nails, comprising a top cover plate, a liquid injection port being provided on the top cover plate, the liquid injection port being divided into a truncated cone section and a cylindrical section, a sealing nail being inserted into the liquid injection port, the sealing nail being divided into a sealing cover and a sealing nail body, the sealing nail body being inserted into the cylindrical section of the liquid injection port, the sealing cover being clamped in the truncated cone section, the top of the sealing cover extending outward and being erected on the top surface of the top cover plate, a groove being provided on the top surface of the top cover plate on the outside of the weld between the sealing cover and the top cover plate.

[0005] A groove is provided on the top of the top cover plate. The groove is located below the extension of the sealing cover and between the liquid injection port and the groove.

[0006] The edge of the groove outlet is rounded.

[0007] 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, the top of the nail head is fixedly connected to the bottom of the nail rod, a circular ring is fixedly sleeved on the outer side of the middle part of the nail rod, and a first sealing ring is arranged between the circular ring and the top of the nail head and is sleeved on the nail rod.

[0008] Furthermore, a ring groove is provided on the side surface of the circular ring, and a second sealing ring is provided in the ring groove and sleeved on the outer side of the circular ring.

[0009] Furthermore, the first sealing ring and the second sealing ring are both interference fit with the liquid injection port.

[0010] Furthermore, a triangular slope is provided at a corner where the outer side surface of the sealing cover contacts the top surface of the top cover plate.

[0011] Furthermore, a vertical groove is provided on the top surface of the sealing cover.

[0012] In the above technical solution, the sealing welding nail structure provided by the present invention has the beneficial effects of:

[0013] The present invention optimizes the welding method of the battery cell injection port, reduces the adverse effects of electrolyte contamination of the injection port and the gap size of the injection port on the sealing welding, reduces the welding difficulty, improves the welding yield, simplifies the rework operation, and ensures the stability and firmness of the injection port welding.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0015] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0018] Figure 2 The embodiment of the present invention provides Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 The embodiment of the present invention provides Figure 1 Enlarged view of point B in the middle.

[0020] Description of reference numerals:

[0021] 1. Top cover plate; 11. Groove; 12. Liquid filling port; 2. Sealing cover; 21. Vertical groove; 22. Triangular slope; 3. Sealing nail body; 31. Nail head; 32. Nail rod; 33. Circular ring; 331. Ring groove; 4. First sealing ring; 5. Second sealing ring; 6. Groove. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0023] See also Figure 1-Figure 3 The cam 12 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12. The sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12. The sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12, 13 and 14, and the sealing member 3 is provided with a plurality of sealing members 12,

[0024] Specifically, refer to Figure 1 The top of the sealing cover 2 is mounted on the top cover plate 1, and the area where the long side extending from the sealing cover 2 and the top surface of the top cover plate 1 is located is the welding area. A groove 11 is opened on the outside of the welding area, which can be used to release the internal stress of the welding during welding. Since the welding area is far away from the liquid filling port 12, the influence of welding heat on the sealing part inside the liquid filling port 12 can be effectively avoided. In addition, when poor welding occurs, the nails can be directly lifted, and the welding surface can be polished and then welded again. The current welding method of the battery cell liquid filling port 12 is optimized, the electrolyte contamination of the liquid filling port 12 and the adverse effects of the gap size of the liquid filling port 12 on the sealing welding are reduced, the welding difficulty is reduced, the welding yield is improved, and the rework operation is simplified, thereby ensuring the stability and firmness of the welding of the liquid filling port 12.

[0025] 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 circular ring 33 is fixedly sleeved on the outer side of the middle part of the nail rod 32. A first sealing ring 4 sleeved on the nail rod 32 is provided between the circular ring 33 and the top of the nail head 31. A ring groove 331 is provided on the side of the circular ring 33. A second sealing ring 5 sleeved on the outer side of the circular ring 33 is provided in the ring groove 331. The first sealing ring 4 and the second sealing ring 5 are both interference fit with the liquid injection port 12.

[0026] Specifically, by clamping the first sealing ring 4 between the nail head 31 and the ring 33, the first sealing ring 4 is restricted from moving in the vertical direction and its deformation is 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 liquid filling port 12 by adopting an interference fit, its deformation is mainly manifested in the horizontal direction, and the sealing effect is better. 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.

[0027] Furthermore, a triangular slope 22 is formed at the corner where the outer side surface of the sealing cover 2 contacts the top surface of the top cover plate 1 .

[0028] Specifically, by providing the triangular inclined surface 22 , the welding area between the top surface of the top cover plate 1 and the sealing cover 2 is increased, thereby reducing the welding difficulty, improving the welding strength, and reducing the welding defect rate.

[0029] Furthermore, a vertical groove 21 is formed on the top surface of the sealing cover 2 .

[0030] Specifically, the vertical groove 21 is two vertical rectangular slots arranged side by side. When poor welding occurs, the sealing cover 2 is tilted up, and pliers are inserted into the vertical groove 21 to pull out the sealing cover 2 and the sealing nail body 3, thereby optimizing the nail removal method and improving the secondary welding efficiency.

[0031] In the present invention, reference is made to Figures 1 to 3 First, make the first sealing ring 4 and the second sealing ring 5 interference fit with the liquid injection port 12 so that the sealing nail is inserted into the liquid injection port 12. Due to the obstruction of the frustum section of the liquid injection port 12 and the long side extending from the top of the sealing cover 2 is mounted on the top cover plate 1, the sealing nail is positioned. Then, 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 nail is tested. After passing the test, the installation of the sealing nail is completed. If there is a poor welding, hit the position of the sealing cover 2 directly above the groove 6 to make the sealing cover 2 tilt up. Use a flat-blade screwdriver to expand the tilting amplitude of the sealing cover 2, insert pliers into the vertical groove 21 to clamp out the sealing nail, and grind the welding area, and re-install it.

[0032] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A sealing welding nail structure, comprising a top cover plate (1), characterized in that: The top cover plate (1) is provided with a liquid injection port (12), the liquid injection port (12) is divided into a truncated cone section and a cylindrical section, a sealing nail is inserted into the liquid injection port (12), the sealing nail is divided into a sealing cover (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 cover (2) is clamped in the truncated cone section, the top of the sealing cover (2) extends outward and is mounted on the top surface of the top cover plate (1), and a groove (11) is provided on the top surface of the top cover plate (1) on the outside of the weld between the sealing cover (2) and the top cover plate (1). A groove (6) is provided on the top of the top cover plate (1), the groove (6) is located below the extension of the sealing cover (2), and the groove (6) is located between the liquid injection port (12) and the groove (11). The outlet edge of the groove (6) is rounded.

2. The sealing nail structure for sealing welding 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). The top of the nail head (31) is fixedly connected to the bottom of the nail rod (32). A circular ring (33) is fixedly sleeved on the outer side of the middle of the nail rod (32). A first sealing ring (4) sleeved on the nail rod (32) is provided between the circular ring (33) and the top of the nail head (31).

3. The sealing nail structure for sealing welding according to claim 2, characterized in that: A ring groove (331) is provided on the side surface of the circular ring (33), and a second sealing ring (5) is provided in the ring groove (331) and sleeved on the outside of the circular ring (33).

4. The sealing nail structure for sealing welding according to claim 3, characterized in that: The first sealing ring (4) and the second sealing ring (5) are both interference fit with the liquid injection port (12).

5. The sealing nail structure for sealing welding according to claim 1, characterized in that: A triangular inclined surface (22) is provided at the corner where the outer side surface of the sealing cover (2) contacts the top surface of the top cover plate (1).

6. The sealing nail structure for sealing welding according to claim 1, characterized in that: A vertical groove (21) is provided on the top surface of the sealing cover (2).

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