Sealing rubber nail structure and cylindrical battery

Abstract

The utility model discloses a sealing rubber nail structure and a cylindrical battery, the sealing rubber nail structure comprises an upper sealing element, a lower sealing element and a deformation sealing element, the upper sealing element comprises a sealing cover and a main body part, the main body part is provided with a limiting groove, and the limiting groove comprises a connecting channel and a limiting groove; the lower sealing piece is provided with a limiting buckle, the limiting buckle comprises a connecting column and a clamping hook part, the connecting column is used for being inserted into the connecting channel, and the clamping hook part is used for being inserted into the limiting groove; an upper connecting seat is arranged on the upper sealing element, a lower connecting seat is arranged on the lower sealing element, and the deformation sealing element is connected between the upper connecting seat and the lower connecting seat; and in the state that the deformation sealing piece does not deform, a distance is formed between the upper sealing piece and the limiting buckle. The cylindrical battery sealing structure solves the problems that an existing cylindrical battery sealing structure is complex in installation and poor in sealing performance.

Description

Technical Field

[0001] The utility model mainly relates to a sealing glue nail structure and a cylindrical battery. Background Art

[0002] Cylindrical batteries are a common structure of lithium batteries, usually including a cylindrical metal shell and a cover plate installed at the opening of the shell. Cylindrical batteries need to be filled with electrolyte before sealing, so holes for liquid injection are reserved on the cover plate. After the electrolyte is filled, the holes on the cover plate are sealed.

[0003] The existing cylindrical battery sealing structure usually includes a sealing pin and a sealing cover, and the sealing pin and the sealing cover cooperate with each other to achieve the sealing of the hole. However, the sealing pin and the sealing cover are two independent parts, each of which realizes its own function. The structure and installation process are relatively complicated, and the sealing performance is poor.

[0004] In view of this, it is necessary to improve the existing sealing structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sealing glue nail structure and a cylindrical battery to solve the problems of complex installation and poor sealing of the sealing structure of the existing cylindrical battery.

[0006] The utility model discloses a sealing nail structure, comprising an upper sealing member, a lower sealing member and a deformable sealing member, wherein the upper sealing member comprises a sealing cover and a main body, the main body is provided with a limiting groove, the limiting groove comprises a connecting channel and a limiting groove; the lower sealing member is provided with a limiting buckle, the limiting buckle comprises a connecting column and a hook portion, the connecting column is used to be inserted into the connecting channel, and the hook portion is used to be inserted into the limiting groove; the upper sealing member is provided with an upper connecting seat, the lower sealing member is provided with a lower connecting seat, and the deformable sealing member is connected between the upper connecting seat and the lower connecting seat; when the deformable sealing member is not deformed, a distance is provided between the upper sealing member and the limiting buckle.

[0007] Preferably, the sealing cover is circular, the main body is a round rod, one end of the main body is coaxially mounted at the center of the sealing cover, and the limiting groove is arranged on the end surface of the main body away from the sealing cover.

[0008] Preferably, the lower sealing member is a round rod, and the limiting buckle is installed on an end surface of the lower sealing member.

[0009] Preferably, the limit buckle is elastic, the connecting column is a hollow cylinder, the connecting column and the lower seal are coaxially arranged, the hook portion is a reverse hook structure, and the hook portion is installed at the end of the connecting column away from the lower seal.

[0010] Preferably, the upper connecting seat is arranged on the end surface of the main body away from the sealing cover, and the lower connecting seat is arranged on the end surface of the lower sealing member on which the limiting buckle is arranged.

[0011] Preferably, the upper connecting seat and the lower connecting seat are both annular stepped structures.

[0012] Preferably, a positioning groove is provided on the end surface of the main body facing away from the sealing cover, and a connecting boss is provided on the end surface of the lower connecting seat provided with the limiting buckle, and the connecting boss is used to be inserted into the positioning groove.

[0013] Preferably, the positioning groove is an annular structure, the positioning groove is arranged around the limiting groove, and the connecting boss is an annular structure, and the connecting boss is arranged around the limiting buckle.

[0014] Preferably, a buffer is provided at the end of the lower sealing member facing away from the limiting buckle.

[0015] The utility model discloses a cylindrical battery, comprising any of the above-mentioned sealing glue nail structures, and also comprising a cover plate and a current collecting plate, wherein the cover plate is provided with a liquid injection hole and a sinking hole, wherein the sinking hole is located at the edge of the liquid injection hole, the main body and the lower sealing member are inserted into the liquid injection hole, and the sealing cover is embedded in the sinking hole.

[0016] The beneficial effects of the utility model are:

[0017] The sealing nail is made into two separate structures, an upper sealing part and a lower sealing part, and a compressible deformable sealing part is arranged between the two structures; when the sealing nail is inserted into the injection hole and the limiting buckle is completely inserted into the limiting groove, the upper and lower seals can be firmly connected as one, and at the same time, the connecting boss is embedded in the positioning groove for fixing, and the deformable sealing part seals the injection hole by deformation. Therefore, during installation, it is only necessary to press the sealing nail downward to the limit position, and the installation is simpler and faster. A part of the deformable sealing part fills the gap between the sealing nail and the injection hole, and the other part seals the edge of the injection hole through elastic abutment, and the sealing effect is better. Therefore, the utility model solves the problems of complex installation and poor sealing of the existing cylindrical battery sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the sealing glue nail structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the sealing nail structure installed on the cover plate and the current collecting plate in the cylindrical battery of the present invention.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. Upper sealing member; 11. Sealing cover; 12. Main body; 121. Limiting groove; 1211. Connecting channel; 1212. Limiting groove; 122. Positioning groove; 123. Upper connecting seat; 2. Lower sealing member; 21. Limiting buckle; 211. Connecting column; 212. Hook portion; 22. Connecting boss; 23. Lower connecting seat; 3. Deformable sealing member; 4. Buffer member; 5. Cover plate; 51. Injection hole; 52. Sinking hole; 6. Collecting plate. DETAILED DESCRIPTION

[0022] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0023] Example 1

[0024] Reference Figure 1 , is a sealing nail structure disclosed by the utility model, comprising an upper sealing member 1, a lower sealing member 2, a deformable sealing member 3 and a buffer member 4, wherein the upper sealing member 1 comprises a sealing cover 11 and a main body 12, the sealing cover 11 is a circular plate structure, the main body 12 is a round rod structure, the main body 12 is coaxially fixed at the center of the circle of the lower surface of the sealing cover 11, and a limiting groove 121 is provided on the end surface of the main body 12 away from the sealing cover 11, the limiting groove 121 is a long strip structure, the limiting groove 121 is located at the axis center of the main body 12, the limiting groove 121 comprises a connecting channel 1211 and a limiting groove 1212, the connecting channel 1211 is a long strip circular hole, the limiting groove 1212 is arranged at the end of the connecting channel 1211 located in the main body 12, and is communicated with the connecting channel 1211.

[0025] Reference Figure 1 A positioning groove 122 is provided on the end surface of the main body 12 away from the sealing cover 11. The positioning groove 122 is an annular groove. The positioning groove 122 surrounds the outer side of the connecting channel 1211 and is coaxially arranged with the main body 12. The positioning groove 122 is used to cooperate with the lower sealing member 2 to achieve a positioning connection; in addition, an upper connecting seat 123 is also provided on the edge of the end surface of the main body 12 away from the sealing cover 11. The upper connecting seat 123 is a stepped structure formed by the edge of the main body 12. The upper connecting seat 123 is annular and is used to install the buffer member 4.

[0026] Reference Figure 1The lower seal 2 is a round rod structure, one end of the lower seal 2 is axially facing the upper seal 1, and the other end is axially away from the upper seal 1. A limit buckle 21 is provided at the end of the lower seal 2 facing the upper seal 1, and the limit buckle 21 includes a connecting column 211 and a hook portion 212. The connecting column 211 is a hollow thin-walled cylindrical structure. The connecting column 211 is coaxially fixed with the lower seal 2, and a hook portion 212 is provided at the end of the connecting column 211 away from the lower seal 2. The hook portion 212 is an annular inverted hook structure, and the hook portion 212 and the connecting column 211 can both undergo elastic deformation. After the limit buckle 21 is fully inserted into the limit groove 121, the hook portion 212 can be pressed against the limit groove 1212 under the action of elasticity, thereby preventing the upper seal 1 and the lower seal 2 from separating from each other, and the connecting column 211 is filled in the connecting channel 1211, thereby realizing a fixed connection between the upper seal 1 and the lower seal 2.

[0027] Reference Figure 1 A connecting boss 22 is provided on the end face of the lower seal 2 facing the upper seal 1. The connecting boss 22 is an annular protrusion. The connecting boss 22 surrounds the outer side of the connecting column 211 and is concentrically arranged with the lower seal 2. When the lower seal 2 and the upper seal 1 are connected to each other, the connecting boss 22 will be inserted into the positioning groove 122 of the upper seal 1 to ensure the stability of the connection between the upper seal 1 and the lower seal 2; a lower connecting seat 23 is also provided on the edge of the end face of the lower seal 2 facing the upper seal 1. The lower connecting seat 23 is a stepped structure and is annular. The lower connecting seat 23 is used to cooperate with the upper connecting seat 123 to realize the installation of the buffer 4.

[0028] Reference Figure 1 The deformable seal 3 is a cylindrical structure. The deformable seal 3 is made of rubber material. One end of the deformable seal 3 is sleeved on the upper connecting seat 123, and the other end is sleeved on the lower connecting seat 23. When the deformable seal 3 is installed between the upper seal 1 and the lower seal 2, a closed space can be formed between the upper seal 1 and the lower seal 2. The space is used to ensure the distance between the upper seal 1 and the lower seal 2, and is used for compressing the deformable seal 3. When the upper seal 1 and the lower seal 2 are inserted and connected to each other, the deformable seal 3 can be compressed and deformed to a flat shape. The end of the lower seal 2 facing away from the upper seal 1 is also provided with a buffer 4. The buffer 4 is made of rubber material. The buffer 4 is coated on the end of the lower seal 2 and is used to play a buffering role when the sealing nail is installed.

[0029] Example 2

[0030] The cylindrical battery disclosed in the utility model includes the sealing glue nail structure in embodiment 1, and also includes a cover plate 5 and a current collecting plate 6. Figure 2The cover plate 5 is a metal plate structure, the collecting plate 6 is arranged below the cover plate 5, and a liquid injection hole 51 is opened on the surface of the cover plate 5. The liquid injection hole 51 is a circular through hole and passes through the collecting plate 6. The diameter of the liquid injection hole 51 is the same as the outer diameter of the main body 12 and the outer diameter of the lower sealing member 2. The edge of the liquid injection hole 51 away from the collecting plate 6 is also provided with a sinking hole 52. The sinking hole 52 is circular and is concentric with the liquid injection hole 51. The diameter of the sinking hole 52 is the same as the outer diameter of the sealing member 2. The diameter of the sealing cover 11 is the same, and the depth of the sinking hole 52 is the same as the thickness of the sealing cover 11. When the injection hole 51 needs to be sealed, the above-mentioned sealing nail is inserted from the injection hole 51, and the lower sealing member 2 first enters the injection hole 51 downward, then the buffer member 4 will first abut against the collecting plate 6, and then the upper sealing member 1 moves to the lower sealing member 2, so that the deformable sealing member 3 is continuously compressed until the limit buckle 21 is completely fixed in the limit groove 121. At this time, refer to Figure 2 The sealing cover 11 is completely embedded in the sinking hole 52 , the deformable sealing member 3 is compressed to a flat shape and abuts against the lower surface of the cover plate 5 , thereby achieving the purpose of sealing the injection hole 51 .

[0031] The implementation principle and beneficial effect of the utility model are as follows: the sealing nail is made into two separate structures, the upper sealing part 1 and the lower sealing part 2, and a compressible deformable sealing part 3 is arranged between the two structures; when the sealing nail is inserted into the injection hole 51 and the limiting buckle 21 is completely inserted into the limiting groove 121, the upper and lower seals can be firmly connected as one, and at the same time, the connecting boss 22 is embedded in the positioning groove 122 for fixing, and the deformable sealing part 3 seals the injection hole 51 by deformation, so during installation, it is only necessary to press the sealing nail downward to the limit position, and the installation is simpler and faster. A part of the deformable sealing part 3 is filled in the gap between the sealing nail and the injection hole 51, and the other part is elastically abutted to seal the edge of the injection hole 51, and the sealing effect is better. Therefore, the utility model solves the problems of complex installation and poor sealing of the existing cylindrical battery sealing structure.

[0032] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A sealing nail structure, characterized in that: The invention comprises an upper sealing member (1), a lower sealing member (2) and a deformable sealing member (3); the upper sealing member (1) comprises a sealing cover (11) and a main body (12); a limiting groove (121) is provided on the main body (12); the limiting groove (121) comprises a connecting channel (1211) and a limiting groove (1212); a limiting buckle (21) is provided on the lower sealing member (2); the limiting buckle (21) comprises a connecting column (211) and a hook portion (212); the connecting column (211) is used to be inserted into the connecting channel (1211); and the hook portion (212) is used to be inserted into the limiting groove (1212); An upper connecting seat (123) is provided on the upper sealing member (1), a lower connecting seat (23) is provided on the lower sealing member (2), and the deformable sealing member (3) is connected between the upper connecting seat (123) and the lower connecting seat (23).

2. The sealing nail structure according to claim 1, characterized in that: The sealing cover (11) is circular, the main body (12) is a round rod, one end of the main body (12) is coaxially mounted at the center of the sealing cover (11), and the limiting groove (121) is arranged on the end surface of the main body (12) away from the sealing cover (11).

3. The sealing glue nail structure according to claim 2, characterized in that: The lower sealing member (2) is a round rod, and the limiting buckle (21) is installed on an end surface of the lower sealing member (2).

4. The sealing glue nail structure according to claim 3, characterized in that: The limit buckle (21) is elastic, the connecting column (211) is a hollow cylinder, the connecting column (211) is coaxially arranged with the lower sealing member (2), the hook portion (212) is a reverse hook structure, and the hook portion (212) is installed at the end of the connecting column (211) away from the lower sealing member (2).

5. The sealing glue nail structure according to claim 3 or 4, characterized in that: The upper connecting seat (123) is arranged on the end surface of the main body (12) facing away from the sealing cover (11), and the lower connecting seat (23) is arranged on the end surface of the lower sealing member (2) on which the limiting buckle (21) is arranged.

6. The sealing glue nail structure according to claim 5, characterized in that: The upper connecting seat (123) and the lower connecting seat (23) are both annular stepped structures.

7. The sealing glue nail structure according to claim 3 or 4, characterized in that: A positioning groove (122) is provided on the end surface of the main body (12) facing away from the sealing cover (11), and a connecting boss (22) is provided on the end surface of the lower connecting seat (23) provided with the limiting buckle (21), and the connecting boss (22) is used to be inserted into the positioning groove (122).

8. The sealing nail structure according to claim 7, characterized in that: The positioning groove (122) is an annular structure, and the positioning groove (122) is arranged around the limiting groove (121); the connecting boss (22) is an annular structure, and the connecting boss (22) is arranged around the limiting buckle (21).

9. The sealing glue nail structure according to claim 3 or 4, characterized in that: A buffer component (4) is provided at the end of the lower sealing component (2) facing away from the limiting buckle (21).

10. A cylindrical battery, characterized in that: It comprises the sealing nail structure described in any one of claims 1 to 9, and also comprises a cover plate (5) and a collecting plate (6), the cover plate (5) is provided with an injection hole (51) and a sinking hole (52), the sinking hole (52) is located at the edge of the injection hole (51), the main body (12) and the lower sealing component (2) are inserted into the injection hole (51), and the sealing cover (11) is embedded in the sinking hole (52).

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