Sealing nail structure and battery

Abstract

The utility model relates to a sealing nail structure and a battery, and relates to the technical field of new energy batteries. The utility model provides a sealing nail structure which is arranged in a liquid injection hole of a top cover, and the liquid injection hole is communicated with a first through hole and a second through hole. The sealing nail structure comprises a sealing nail and a sealing rubber nail, the sealing nail is arranged in the first through hole, and the sealing rubber nail is arranged in the second through hole; a protrusion is arranged at the bottom of the sealing nail and abuts against the top face of the sealing rubber nail. The bottom of the sealing nail is provided with the protrusion, the protrusion abuts against the top face of the sealing rubber nail, and the sealing rubber nail is ejected out through the protrusion at the bottom of the sealing nail, so that whether the situation that the sealing performance does not conform to a standard product due to poor welding exists or not can be checked in helium detection, and the subsequent production problem caused by missed welding is avoided.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, specifically to a sealing nail structure and a battery. Background Technology

[0002] Currently, sealing the injection hole position of the top cover plate is achieved by inserting a plastic nail into the bottom hole of the injection hole and then welding a flat sealing aluminum nail onto the surface of the top cover plate.

[0003] The inventors discovered that during assembly, plastic nails are first inserted into the injection hole before the sealing aluminum nails are welded. Before welding the sealing aluminum nails, the interference fit between the plastic nails and the injection hole already provides a seal. However, because the upper surface of the plastic nail and the lower surface of the sealing aluminum nail do not contact each other, if welding problems occur during the welding process, they cannot be detected during helium testing, leading to missed detections. Utility Model Content

[0004] The purpose of this invention is to provide a sealing nail structure and a battery that can prevent missed detection during helium testing.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, the present invention provides a sealing nail structure, wherein the sealing nail structure is disposed in the injection hole of the top cover, and the injection hole is connected to a first through hole and a second through hole;

[0007] The sealing nail structure includes a sealing nail and a sealing glue nail, wherein the sealing nail is disposed in the first through hole and the sealing glue nail is disposed in the second through hole;

[0008] The bottom of the sealing nail has a protrusion that abuts against the top surface of the sealing nail.

[0009] Optionally, the first through hole and the second through hole form a step, and the bottom of the sealing nail is connected to the step so that the protrusion pushes the sealing nail out along the second through hole.

[0010] Optionally, the sealing nail is interference-fitted with the second through hole;

[0011] The sealing nail is welded to the step.

[0012] Optionally, the protrusion includes an arcuate protrusion, the bottom of which abuts against the top surface of the sealing nail.

[0013] Optionally, the protrusion includes a cylindrical protrusion, the bottom of which abuts against the top surface of the sealing nail.

[0014] Optionally, the bottom of the columnar protrusion is provided with a groove.

[0015] Optionally, the first through hole and the second through hole are coaxially arranged, and the diameter of the first through hole is larger than the diameter of the second through hole.

[0016] Optionally, the sidewall of the first through hole is a slope;

[0017] The sidewall of the sealing pin is inclined to match the sidewall of the first through hole.

[0018] Secondly, this utility model provides a battery, comprising: the sealing nail structure described in any one of the above claims and the top cover.

[0019] Optionally, the battery further includes a casing and a battery cell, the battery cell being disposed within the casing, and the casing being sealed to the top cover.

[0020] The beneficial effects of the sealing nail structure and battery provided in this embodiment of the utility model include:

[0021] By setting a protrusion at the bottom of the sealing nail, which abuts against the top surface of the sealing nail, the sealing nail is pushed out by the bottom protrusion of the sealing nail. This allows the sealing nail to be detected during helium testing for cases where poor welding results in non-standard sealing performance, thus avoiding missed detections and subsequent production problems. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a top view of the battery provided in this embodiment;

[0024] Figure 2 This is a cross-sectional view of the battery provided in this embodiment;

[0025] Figure 3 for Figure 2 A partial schematic diagram of A in the middle;

[0026] Figure 4 This is a partial schematic diagram of the injection hole provided in this embodiment;

[0027] Figure 5 This is a schematic diagram of the first structure of the sealing nail provided in this embodiment;

[0028] Figure 6This is a schematic diagram of the second structure of the sealing nail provided in this embodiment;

[0029] Figure 7 This is a schematic diagram of the third structure of the sealing nail provided in this embodiment.

[0030] Icons: 010-Battery; 100-Top cover; 110-Injection hole; 111-First through hole; 112-Second through hole; 113-Step; 120-Positive terminal assembly; 130-Negative terminal assembly; 140-Explosion-proof sheet; 200-Shell; 300-Cell; 400-Sealing nail structure; 410-Sealing nail; 411-Disc body; 412-Protrusion; 4121-Groove; 420-Sealing adhesive nail. Detailed Implementation

[0031] The inventors discovered that during assembly, plastic nails are first inserted into the injection hole before the sealing aluminum nails are welded. Before welding the sealing aluminum nails, the interference fit between the plastic nails and the injection hole already provides a seal. However, because the upper surface of the plastic nail and the lower surface of the sealing aluminum nail do not contact each other, if welding problems occur during the welding process, they cannot be detected during helium testing, leading to missed detections.

[0032] To address the aforementioned problems, this utility model provides a sealing nail structure 400 and a battery 010, which can prevent missed detection during helium testing, thereby improving the above-mentioned issues.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0039] The following describes in detail the overall structure, working principle, and technical effects of the sealing nail structure 400 and battery 010 provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0040] Please refer to Figure 1 The sealing nail structure 400 provided by this utility model is applied in the new energy battery 010.

[0041] Please refer to Figure 1 and Figure 2 In this embodiment, the battery 010 includes a sealing nail structure 400, a top cover 100, a housing 200, and a battery cell 300. The battery cell 300 is disposed inside the housing 200, and the housing 200 is sealed to the top cover 100. The sealing nail structure 400 is disposed on the top cover 100.

[0042] In this embodiment, the battery 010 includes a top cover 100.

[0043] Please see below. Figure 2 The top cover 100 is used to laser weld to the housing 200 to wrap and fix the battery cell 300 and achieve a sealing effect.

[0044] In this embodiment, please refer to Figure 1 The top cover 100 is a rectangular plate; please refer to [link / reference]. Figure 4 The top cover 100 is provided with a liquid injection hole 110. The liquid injection hole 110 is a first through hole 111 and a second through hole 112 that are connected and coaxially arranged. The first through hole 111 is located near the top of the top cover 100, and the second through hole 112 is located near the bottom of the top cover 100. The first through hole 111 and the second through hole 112 form a step 113.

[0045] The electrolyte injection hole 110 is used to inject electrolyte into the battery 010, and the sealing nail structure 400 is used to seal the electrolyte injection hole 110.

[0046] The first through hole 111 and the second through hole 112 are both round holes, and the diameter of the first through hole 111 is larger than the diameter of the second through hole 112.

[0047] The first through hole 111 is used to accommodate the sealing nail 410, the top surface of the step 113 limits the sealing nail 410 and is used to weld it to the bottom of the sealing nail 410, and the second through hole 112 is used to seal and install the sealing nail 420.

[0048] Please see below. Figure 4 The sidewall of the first through hole 111 is inclined so that the diameter of the first through hole 111 gradually decreases from the top to the bottom.

[0049] Optionally, please see Figure 1 and Figure 2 The top cover 100 is also connected to a positive terminal assembly 120 and a negative terminal assembly 130; the positive terminal assembly 120 and the negative terminal assembly 130 are set and welded to the positive and negative terminals of the battery cell 300 to ensure the function of the battery cell 300 to conduct charging and discharging current.

[0050] Optionally, please see Figure 1 The top cover 100 is also provided with an explosion-proof hole and an explosion-proof plate 140 on the explosion-proof hole, so that if the battery 010 malfunctions and the internal air pressure increases to a certain value, the explosion-proof plate 140 will be squeezed open and the pressure will be released, reducing the risk of battery 010 explosion.

[0051] Optionally, the bottom of the top cover 100 is provided with a lower plastic, which supports the top cover 100 and the battery cell 300.

[0052] In this embodiment, the battery 010 includes a sealing pin structure 400.

[0053] Among them, the sealing nail structure 400 is used to seal the injection hole 110.

[0054] Please see Figure 1 and Figure 3 In this embodiment, the sealing nail structure 400 is disposed in the injection hole 110 of the top cover 100, and the injection hole 110 is connected to the first through hole 111 and the second through hole 112; the sealing nail structure 400 includes a sealing nail 410 and a sealing glue nail 420, the sealing nail 410 is disposed in the first through hole 111, and the sealing glue nail 420 is disposed in the second through hole 112; the bottom of the sealing nail 410 is provided with a protrusion 412, and the protrusion 412 abuts against the top surface of the sealing glue nail 420.

[0055] Understandably, the existing flat sealing nail 410 does not contact the plastic nail. Therefore, when there is a problem with the welding of the flat sealing nail 410, it will still be considered sealed during helium testing, which can easily lead to missed detection. This application provides a protrusion 412 at the bottom of the sealing nail 410, which abuts against the top surface of the sealing nail 420. The protrusion 412 at the bottom of the sealing nail 410 pushes the sealing nail 420 out, allowing it to be detected during helium testing and avoiding missed detection that could cause subsequent production problems.

[0056] In this embodiment, please refer to Figure 3 The sealing nail structure 400 includes a sealing nail 410; wherein the sealing nail 410 is disposed in the first through hole 111 and connected to the step 113.

[0057] In this embodiment, please refer to Figures 5-7 The sealing nail 410 includes a disc body 411 and a protrusion 412 disposed at the bottom of the disc body 411. The disc body 411 and the protrusion 412 are coaxially arranged, and the height of the disc body 411 and the protrusion 412 is the same as the height of the second through hole 112.

[0058] Optionally, the outer wall of the disc body 411 of the sealing pin 410 is also beveled to match the beveled surface around the second through hole 112.

[0059] In this embodiment, please refer to Figure 3 The bottom of the disc body 411 of the sealing nail 410 is connected to the step 113 so that the protrusion 412 pushes the sealing nail 420 out along the second through hole 112. The top of the disc body 411 of the sealing nail 410 is flush with the top surface of the top cover 100, and the bottom of the disc body 411 of the sealing nail 410 abuts against and is welded to the surface of the step 113.

[0060] Part of the protrusion 412 abuts against the top surface of the sealing nail 420, and part of the protrusion 412 abuts against the step 113, so that the end of the second through hole 112 is sealed.

[0061] Understandably, the protrusion 412 abuts against the top surface of the sealant nail 420, and the protrusion 412 can push the sealant nail 420 out along the second channel.

[0062] In one embodiment, please refer to Figure 5 The protrusion 412 includes an arc-shaped protrusion, the bottom of which abuts against the top surface of the sealing nail 420.

[0063] In one embodiment, please refer to Figure 6 The protrusion 412 includes a cylindrical protrusion, the bottom of which abuts against the top surface of the sealing nail 420.

[0064] In one embodiment, please refer to Figure 7 The protrusion 412 includes a cylindrical protrusion, wherein the bottom of the cylindrical protrusion 412 is provided with a groove 4121 to form an annular protrusion, and the bottom of the annular protrusion abuts against the top surface of the sealing nail 420.

[0065] Optionally, the disc body 411 of the sealing nail 410 is connected to the step 113 by laser welding.

[0066] Among them, the sealing nail 410 can be a metal structural component, such as an aluminum structural component or a stainless steel structural component.

[0067] In this embodiment, the sealing nail structure 400 includes a sealing nail 420.

[0068] Among them, the sealant nail 420 is set in the second through hole 112.

[0069] Optionally, please see Figure 3 The sealing nail 420 is interference-fitted with the second through hole 112.

[0070] Among them, the sealing nail 420 is a structural component made of rubber, PP+EPDM and other materials.

[0071] The working principle and process of the sealing nail structure 400 provided in this embodiment of the utility model are as follows:

[0072] Please see Figure 3 The sealing nail 420 is interference-fitted into the second through hole 112, and the sealing nail 410 is placed in the first through hole 111, so that the protrusion 412 at the bottom of the sealing nail 410 pushes the sealing nail 420 downward along the second through hole 112; the bottom of the sealing nail 410 is welded to the step 113.

[0073] Because the bottom of the sealing nail 410 contacts the sealing nail 420 and the sealing nail 420 is pushed out by the protrusion 412, it is possible to detect whether the sealing nail 410 has poor welding and therefore does not meet the standard product sealing when performing battery helium testing later, thus avoiding missed detection.

[0074] In summary, the sealing nail structure 400 and battery 010 provided in this embodiment of the present invention, by providing a protrusion 412 at the bottom of the sealing nail 410, the protrusion 412 abuts against the top surface of the sealing nail 420, and the sealing nail 420 is pushed out by the bottom protrusion 412 of the sealing nail 410, so that it can be detected in the helium test whether there is a case of poor welding that results in the sealing performance not meeting the standard product, thus avoiding missed detection and subsequent production problems.

[0075] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A sealing nail structure, characterized in that, The sealing pin structure is disposed in the injection hole of the top cover, and the injection hole is connected to the first through hole and the second through hole; The sealing nail structure includes a sealing nail and a sealing glue nail, wherein the sealing nail is disposed in the first through hole and the sealing glue nail is disposed in the second through hole; The bottom of the sealing nail has a protrusion that abuts against the top surface of the sealing nail.

2. The sealing nail structure according to claim 1, characterized in that, The first through hole and the second through hole form a step, and the bottom of the sealing nail is connected to the step so that the protrusion pushes the sealing nail out along the second through hole.

3. The sealing nail structure according to claim 2, characterized in that, The sealing nail is interference-fitted with the second through hole; The sealing nail is welded to the step.

4. The sealing nail structure according to claim 1, characterized in that, The protrusion includes an arc-shaped protrusion, the bottom of which abuts against the top surface of the sealing nail.

5. The sealing nail structure according to claim 1, characterized in that, The protrusion includes a cylindrical protrusion, the bottom of which abuts against the top surface of the sealing nail.

6. The sealing nail structure according to claim 5, characterized in that, The bottom of the cylindrical protrusion is provided with a groove.

7. The sealing nail structure according to claim 1, characterized in that, The first through hole and the second through hole are coaxially arranged, and the diameter of the first through hole is larger than the diameter of the second through hole.

8. The sealing nail structure according to claim 1, characterized in that, The sidewall of the first through hole is a slope; The sidewall of the sealing pin is inclined to match the sidewall of the first through hole.

9. A battery, characterized in that, include: The sealing pin structure and the top cover as described in any one of claims 1-8.

10. The battery according to claim 9, characterized in that, The battery also includes a casing and a battery cell, the battery cell being disposed inside the casing, and the casing being sealed to the top cover.

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