Sealing rubber nail

Abstract

The utility model provides a sealing rubber nail, and relates to the technical field of lithium batteries, the sealing rubber nail comprises a sealing upper cover and a rubber nail main body, the upper end of the rubber nail main body is connected with the lower end face of the sealing upper cover; the sealing upper cover is used for being welded with a battery cover plate, and the plastic nail main body is used for sealing the liquid injection hole. According to the sealing rubber nail provided by the utility model, the sealing upper cover and the rubber nail main body are integrated, the rubber nail main body is arranged at the lower end of the sealing upper cover, the rubber nail main body is used for sealing a liquid injection hole, and the sealing upper cover is used for being welded with a battery cover plate; due to the fact that the rubber nail body and the sealing upper cover are integrated, when the sealing rubber nail is used for sealing the liquid injection hole, the problem that the rubber nail body protrudes to cause poor welding of the sealing upper cover and the battery cover plate is solved, one-step installation technology can be reduced, and the technology cost is reduced to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a sealing glue nail. Background Art

[0002] The existing method of sealing the injection hole is to insert a sealing nail into the injection hole after the secondary injection of the battery is completed, then draw negative pressure inside the battery cell and fill it with helium, press the sealing nail to the same position as the injection hole, and then weld a sealing aluminum nail to the injection hole to seal the injection hole.

[0003] The existing liquid injection hole sealing technology is divided into two steps. If the sealing nails are of different sizes or the air pressure inside the battery cell is too high, causing the sealing nails to bulge, it will cause poor welding results such as explosion of the sealing aluminum nails, and reduce the battery yield.

[0004] Since the sealing nails are mainly made of elastic material, if the size is not properly matched, the sealing nails will fall off from the injection hole and fall into the battery cell, thereby affecting the sealing of the lithium-ion battery and posing a safety hazard. Utility Model Content

[0005] The utility model aims to provide a sealing glue nail, so as to alleviate and solve the technical problem that the sealing glue nail and the sealing aluminum nail are separated, resulting in poor matching and causing poor welding.

[0006] The utility model provides a sealing glue nail, comprising a sealing upper cover and a glue nail body, wherein the upper end of the glue nail body is connected to the lower end surface of the sealing upper cover;

[0007] The sealing upper cover is used for welding with the battery cover plate, and the glue nail body is used for sealing the liquid injection hole.

[0008] In an optional embodiment, a lower protruding column is provided on the lower end surface of the sealing upper cover, a lower clamping plate is provided on the lower end surface of the lower protruding column, and a limiting clamping groove is formed between the edge of the lower clamping plate and the sealing upper cover;

[0009] An annular protrusion is arranged on the main body of the rubber nail, and an inwardly extending clamping protrusion is arranged at the upper end of the annular protrusion; and the clamping protrusion matches the limiting clamping groove.

[0010] In an optional embodiment, a first assembly groove is provided at the lower end of the sealing upper cover, and a first side limiting groove is provided on the peripheral side of the first assembly groove;

[0011] The upper end of the glue nail body matches the first assembly groove, and a first side limiting protrusion matching the first side limiting groove is arranged on the peripheral side of the glue nail body.

[0012] In an optional embodiment, a second assembly groove is provided on the lower end surface of the sealing upper cover, and a second side limiting groove is provided on the second assembly groove; a first fixing groove is provided on a side of the second side limiting groove away from the upper end surface of the sealing upper cover;

[0013] The upper end of the glue nail body matches the second assembly groove, a second side limiting protrusion is arranged on the glue nail body, and a first fixing clamping platform matching the first fixing slot is arranged on the side of the second side limiting protrusion facing the first fixing slot.

[0014] In an optional embodiment, an arc-shaped groove is provided on the upper end surface of the sealing upper cover.

[0015] In an optional embodiment, a plurality of air-permeable grooves are arranged around the main body of the adhesive nail, and the air-permeable grooves extend toward an end away from the sealing upper cover.

[0016] In an optional embodiment, the surface of the air-permeable groove is an arc-shaped surface, and the axis of the arc-shaped surface is in the same direction as the length direction of the nail body.

[0017] In an optional embodiment, three air permeable grooves are provided on the glue nail body, and the three air permeable grooves are evenly arranged along the circumference of the glue nail body.

[0018] In an optional embodiment, an abutment portion is formed between two adjacent air-permeable grooves, and the abutment portion abuts against the inner wall of the injection hole to pre-install the glue nail body on the injection hole.

[0019] In an optional embodiment, the sealing upper cover is made of aluminum, and the rubber nail body is made of polypropylene.

[0020] The sealing upper cover of the sealing nail provided by the utility model is integrated with the nail body, the nail body is arranged at the lower end of the sealing upper cover, the nail body is used to seal the liquid injection hole, and the sealing upper cover is used to be welded with the battery cover plate; since the nail body and the sealing upper cover are integrated, when the sealing nail is used to seal the liquid injection hole, the nail body will not bulge, causing the problem of poor welding between the sealing upper cover and the battery cover plate, and the one-step installation process can be reduced, thereby reducing the process cost to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of the sealing nail provided by the embodiment of the utility model;

[0023] Figure 2 for Figure 1 The structural schematic diagram of the AA section of the sealing nail shown;

[0024] Figure 3 for Figure 1 Another structural schematic diagram of the AA section of the sealing nail shown;

[0025] Figure 4 for Figure 1 Another structural schematic diagram of the AA section of the sealing nail shown;

[0026] Figure 5 for Figure 1 A schematic structural diagram of the sealing nail from another angle shown;

[0027] Figure 6 for Figure 1 A schematic structural diagram of a longitudinal section of a sealing upper cover of a sealing glue nail shown;

[0028] Figure 7 for Figure 1 The schematic diagram of the structure of the sealing nail body is shown.

[0029] Icon: 100-sealing upper cover; 101-arc groove; 102-second side limiting groove; 103-first fixed slot; 104-second assembly groove; 105-first assembly groove; 106-first side limiting groove; 107-lower protruding column; 108-lower clamping plate; 109-limiting slot; 200-glue nail body; 201-second side limiting protrusion; 202-first fixed clamping platform; 203-first side limiting protrusion; 204-annular protrusion; 205-clamping protrusion; 206-ventilation groove; 207-abutment part. DETAILED DESCRIPTION

[0030] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0033] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0034] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings.

[0035] The utility model provides a sealing nail, comprising a sealing upper cover 100 and a nail body 200, wherein the upper end of the nail body 200 is connected to the lower end surface of the sealing upper cover 100;

[0036] The sealing upper cover 100 is used for welding with the battery cover plate, and the glue nail body 200 is used for sealing the injection hole.

[0037] In some embodiments, the sealing upper cover 100 of the sealing nail is made of a material that can be welded to the battery cover plate, and the nail body 200 can be inserted into the injection hole to achieve sealing of the injection hole.

[0038] Since the nail body 200 and the sealing cover 100 are integrated, after the nail body 200 is inserted into the injection hole, the sealing cover 100 can be moved to completely insert the nail body 200 into the injection hole, so that the nail body 200 will not bulge, avoiding adverse consequences such as explosion welding of the sealing aluminum nail.

[0039] Generally, the main body 200 of the nail and the injection hole are interference fit, and the sealing cover 100 and the battery cover are welded in one step to achieve a sealing effect.

[0040] The material of the nail body 200 is mainly PP material, and can also be other materials; the PP material and the sealing cover 100 are film-formed by injection molding, so that the nail body 200 and the sealing cover 100 can achieve a tight fit effect.

[0041] In an optional embodiment, a lower protruding column 107 is provided on the lower end surface of the sealing upper cover 100, a lower clamping plate 108 is provided on the lower end surface of the lower protruding column 107, and a limiting clamping groove 109 is formed between the edge of the lower clamping plate 108 and the sealing upper cover 100;

[0042] The nail body 200 is provided with an annular protrusion 204 , and the upper end of the annular protrusion 204 is provided with an inwardly extending clamping protrusion 205 ; and the clamping protrusion 205 matches the limiting clamping groove 109 .

[0043] In some embodiments, a lower protruding column 107 is provided at the lower end of the sealing upper cover 100, and a lower clamping plate 108 is provided on the lower protruding column 107. The diameter of the lower clamping plate 108 is larger than the diameter of the lower protruding column 107, and the lower clamping plate 108 is concentrically arranged with the lower protruding column 107; a limiting clamping groove 109 is formed between the part of the lower clamping plate 108 protruding from the lower protruding column 107 and the sealing upper cover 100.

[0044] When the plastic nail body 200 is injected, an annular protrusion 204 is formed on the plastic nail body 200, and the annular protrusion 204 surrounds the lower clamping plate 108 and the lower protruding column 107, and a clamping protrusion 205 is formed on the annular protrusion 204 and inserted into the limiting clamping groove 109; thereby, the plastic nail body 200 is tightly connected to the sealing upper cover 100.

[0045] In an optional embodiment, a first assembly groove 105 is provided at the lower end of the sealing upper cover 100, and a first side limiting groove 106 is provided on the peripheral side of the first assembly groove 105;

[0046] The upper end of the glue nail body 200 matches the first assembly groove 105 , and a first side limiting protrusion 203 matching the first side limiting groove 106 is provided on the circumference of the glue nail body 200 .

[0047] In some embodiments, a first assembly groove 105 is disposed on the sealing upper cover 100 , and a first side limiting groove 106 is disposed around the first assembly groove 105 . The first side limiting groove 106 is disposed at a middle position around the first assembly groove 105 .

[0048] The upper end of the nail body 200 can be inserted into the first assembly groove 105, and a first side limiting protrusion 203 that can be inserted into the first side limiting groove 106 is formed on the nail body 200; in this way, the nail body 200 is connected to the sealing upper cover 100, and the nail body 200 will not be separated from the sealing upper cover 100, that is, the nail body 200 will not fall into the battery from the injection hole.

[0049] In an optional embodiment, a second assembly groove 104 is provided on the lower end surface of the sealing upper cover 100, and a second side limiting groove 102 is provided on the second assembly groove 104; a first fixing groove 103 is provided on a side of the second side limiting groove 102 away from the upper end surface of the sealing upper cover 100;

[0050] The upper end of the nail body 200 matches the second assembly groove 104 , and a second side limiting protrusion 201 is provided on the nail body 200 . A first fixing base 202 matching the first fixing groove 103 is provided on the side of the second side limiting protrusion 201 facing the first fixing groove 103 .

[0051] In some embodiments, a second assembly groove 104 is provided on the sealing upper cover 100, and a second side limiting groove 102 is provided on the peripheral side of the second assembly groove 104, and the second side limiting groove 102 is provided at one end of the second assembly groove 104 away from the nail body 200; a first fixing slot 103 is provided in the second side limiting groove 102.

[0052] The upper end of the nail body 200 can be inserted into the second assembly groove 104, and a second side limiting protrusion 201 is formed on the nail body 200, and a first fixed clamping platform 202 is arranged on the second side limiting protrusion 201; this assembly method is the most secure among the three assembly methods, the first fixed clamping platform 202 is clamped in the first fixed clamping groove 103, and the second side limiting protrusion 201 is clamped in the second side limiting groove 102, so as to realize the secure connection between the nail body 200 and the sealing upper cover 100.

[0053] In an optional embodiment, an arc groove 101 is provided on the upper end surface of the sealing upper cover 100 .

[0054] An arc groove 101 is provided on the upper end surface of the sealing upper cover 100 , and the arc groove 101 can absorb the impact force during laser welding.

[0055] In an optional embodiment, a plurality of air-permeable grooves 206 are disposed around the circumference of the nail body 200 , and the air-permeable grooves 206 extend toward an end away from the sealing upper cover 100 .

[0056] In some embodiments, a plurality of air permeable grooves 206 are provided on the peripheral side of the nail body 200, and one end of the nail body 200 is inserted into the injection hole. At this time, the sealing nail is pre-fixed in the injection hole. At this time, the air permeable grooves 206 can connect the inside and outside of the battery; during the battery shaping process, air enters the battery or the outside of the battery through the air permeable grooves 206.

[0057] In an optional embodiment, the surface of the air-permeable groove 206 is an arc-shaped surface, and the axis of the arc-shaped surface is in the same direction as the length direction of the nail body 200 .

[0058] In some embodiments, the surface of the air groove 206 is an arc-shaped surface, which can effectively increase the effective air permeability area of ​​the air groove 206. While ensuring the same effective air permeability area of ​​the sealing nail, the abutment area between the nail body 200 and the inner wall of the injection hole is increased, so that the friction between the nail body 200 and the inside of the injection hole is increased, making it difficult for the nail body 200 to move relative to the injection hole.

[0059] In an optional embodiment, three air-permeable grooves 206 are disposed on the glue nail body 200 , and the three air-permeable grooves 206 are evenly arranged along the circumference of the glue nail body 200 .

[0060] In an optional embodiment, an abutment portion 207 is formed between two adjacent vent grooves 206 , and the abutment portion 207 abuts against the inner wall of the injection hole to pre-install the glue nail body 200 on the injection hole.

[0061] In an optional embodiment, the sealing upper cover 100 is made of aluminum, and the nail body 200 is made of polypropylene.

[0062] In some embodiments, the sealing upper cover 100 is made of aluminum, and the nail body 200 can be made of rubber or PP material; the PP material is polypropylene material.

[0063] Three air-permeable grooves 206 are evenly arranged around the circumference of the glue nail body 200, and abutment portions 207 are formed between two connected air-permeable grooves 206, and the abutment portions 207 are used to abut against the inner wall of the injection hole, wherein the size of the air-permeable grooves 206 affects the size of the abutment portions 207; a guide surface is arranged on the glue nail body 200, and the guide surface facilitates the insertion of the glue nail body 200 into the injection hole, and the diameter of the glue nail body 200 at the guide surface is smaller than the inner diameter of the injection hole, which facilitates the insertion of the glue nail body 200.

[0064] The sealing upper cover 100 and the nail body 200 of the sealing nail provided by the utility model are integrated, and the nail body 200 is arranged at the lower end of the sealing upper cover 100, the nail body 200 is used to seal the injection hole, and the sealing upper cover 100 is used to be welded with the battery cover plate; since the nail body 200 and the sealing upper cover 100 are integrated, when the sealing nail is used to seal the injection hole, the nail body 200 will not bulge, causing the problem of poor welding between the sealing upper cover 100 and the battery cover plate, and it can reduce one step of the installation process, thereby reducing the process cost to a certain extent.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A sealing nail, characterized in that: It comprises a sealing upper cover (100) and a glue nail body (200), wherein the upper end of the glue nail body (200) is connected to the lower end surface of the sealing upper cover (100); The sealing upper cover (100) is used for welding with the battery cover plate, and the glue nail body (200) is used for sealing the liquid injection hole.

2. The sealing nail according to claim 1, characterized in that: A lower protruding column (107) is provided on the lower end surface of the sealing upper cover (100), a lower clamping plate (108) is provided on the lower end surface of the lower protruding column (107), and a limiting clamping groove (109) is formed between the edge of the lower clamping plate (108) and the sealing upper cover (100); The rubber nail body (200) is provided with an annular protrusion (204), and the upper end of the annular protrusion (204) is provided with an inwardly extending clamping protrusion (205); and the clamping protrusion (205) matches the limiting clamping groove (109).

3. The sealing nail according to claim 1, characterized in that: A first assembly groove (105) is provided at the lower end of the sealing upper cover (100), and a first side limiting groove (106) is provided on the peripheral side of the first assembly groove (105); The upper end of the glue nail body (200) matches the first assembly groove (105), and a first side limiting protrusion (203) matching the first side limiting groove (106) is provided on the peripheral side of the glue nail body (200).

4. The sealing nail according to claim 1, characterized in that: The lower end surface of the sealing upper cover (100) is provided with a second assembly groove (104), and a second side limiting groove (102) is provided on the second assembly groove (104); a first fixing groove (103) is provided on a side of the second side limiting groove (102) away from the upper end surface of the sealing upper cover (100); The upper end of the glue nail body (200) matches the second assembly groove (104), and a second side limiting protrusion (201) is arranged on the glue nail body (200), and a first fixing base (202) matching the first fixing groove (103) is arranged on the side of the second side limiting protrusion (201) facing the first fixing groove (103).

5. The sealing nail according to claim 1, characterized in that: An arc-shaped groove (101) is provided on the upper end surface of the sealing upper cover (100).

6. The sealing nail according to claim 1, characterized in that: A plurality of air permeable grooves (206) are arranged in the circumference of the glue nail body (200), and the air permeable grooves (206) extend toward an end away from the sealing upper cover (100).

7. The sealant nail according to claim 6, characterized in that: The surface of the vent groove (206) is an arc-shaped surface, and the axis of the arc-shaped surface is in the same direction as the length direction of the nail body (200).

8. The sealing nail according to claim 6, characterized in that: The glue nail body (200) is provided with three air permeable grooves (206), and the three air permeable grooves (206) are evenly arranged along the circumference of the glue nail body (200).

9. The sealing nail according to claim 6, characterized in that: An abutment portion (207) is formed between two adjacent vent grooves (206), and the abutment portion (207) abuts against the inner wall of the injection hole to pre-install the glue nail body (200) on the injection hole.

10. The sealant nail according to claim 1, characterized in that: The sealing upper cover (100) is made of aluminum, and the nail body (200) is made of polypropylene.

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