Integrated sealing nail

Abstract

The utility model belongs to the technical field of lithium ion batteries, and discloses an integrated sealing nail which comprises a sealing aluminum sheet and a sealing colloidal particle, and the sealing colloidal particle is fixedly connected to the lower end of the sealing aluminum sheet through an injection molding process; the upper end of the sealing aluminum sheet is provided with a stress release groove. According to the utility model, the sealing colloidal particles are fixedly connected to the lower end of the sealing aluminum sheet through the injection molding process, so that battery core parts are reduced, the assembly is convenient, the process cost is reduced, the process error can be reduced, the sealing colloidal particles exist in each battery core, and the liquid leakage risk is reduced; the stress release groove is formed in the upper end of the sealing aluminum sheet, so that during laser welding of the sealing nail, stress can be effectively released, the welding yield is increased, and the liquid leakage risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium-ion batteries, and particularly relates to an integrated sealing nail. Background Art

[0002] With the development of hard-shell battery cells, more and more problems have gradually emerged. Among them, the problem of liquid leakage has always existed and is very difficult to solve. The liquid leakage problem is generally divided into: liquid leakage at the weld, liquid leakage at the pole column, and liquid leakage at the injection hole. The probability of liquid leakage at the injection hole is very high, and many companies in the market have been returned due to liquid leakage at the injection hole, and even accidents have occurred. The main reasons for liquid leakage at the injection hole are the following two: 1. Poor sealing of the sealing rubber particle; 2. Poor welding of the sealing nail.

[0003] In summary, it is necessary to design a new technology to improve the problem of liquid leakage at the injection hole in the existing technology. Content of the Utility Model

[0004] The purpose of the utility model is to provide an integrated sealing nail to solve the above problems existing in the existing technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An integrated sealing nail, comprising a sealing aluminum sheet and a sealing rubber particle. The sealing rubber particle is fixedly connected to the lower end of the sealing aluminum sheet through an injection molding process; a stress relief groove is opened at the upper end of the sealing aluminum sheet.

[0007] As a preferred technical solution in the utility model, a sealing rubber particle fixing hole is opened at the lower end of the sealing aluminum sheet, and the upper part of the sealing rubber particle is fixedly connected in the sealing rubber particle fixing hole.

[0008] As a preferred technical solution in the utility model, the sealing rubber particle fixing hole includes a first through hole and a second through hole that are coaxially communicated from the outside to the inside. The first through hole is a round hole, the second through hole is a tapered hole with an inner diameter that gradually increases from the outside to the inside, and the inner diameter of the end of the second through hole connected to the first through hole is smaller than the inner diameter of the first through hole.

[0009] As a preferred technical solution in the utility model, a positioning hole for visual positioning during the welding of the sealing nail is opened in the middle of the upper end of the sealing aluminum sheet.

[0010] As a preferred technical solution in the utility model, the stress relief groove is an annular groove.

[0011] Beneficial effects: By fixing the sealing rubber particles to the lower end of the sealing aluminum sheet through an injection molding process, the present utility model reduces the number of battery cell parts, facilitates assembly, reduces process costs, can also reduce process errors, ensures that each battery cell has a sealing rubber particle, and reduces the risk of liquid leakage; by providing a stress relief groove 101 at the upper end of the sealing aluminum sheet, stress can be effectively released during laser welding of the sealing nail, increasing the welding yield and reducing the risk of liquid leakage. Description of the Drawings

[0012] Figure 1 is a schematic structural view of the present utility model;

[0013] Figure 2 is a cross-sectional view of the present utility model.

[0014] In the figure: 1 - sealing aluminum sheet; 101 - stress relief groove; 102 - positioning hole; 2 - sealing rubber particle. Detailed Embodiment

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the present utility model in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model.

[0016] Embodiment:

[0017] As Figure 1 and Figure 2 shown, this embodiment provides an integrated sealing nail, including a sealing aluminum sheet 1 and a sealing rubber particle 2. The sealing rubber particle 2 is fixedly connected to the lower end of the sealing aluminum sheet 1 through an injection molding process, thereby integrating the sealing aluminum sheet 1 and the sealing rubber particle 2, reducing the number of battery cell parts, facilitating assembly, reducing process costs, can also reduce process errors, ensuring that each battery cell has a sealing rubber particle, and reducing the risk of liquid leakage; a stress relief groove 101 is provided at the upper end of the sealing aluminum sheet 1, which can effectively release stress during laser welding of the sealing nail, increasing the welding yield and reducing the risk of liquid leakage.

[0018] The present utility model fixes the sealing rubber particle 2 to the lower end of the sealing aluminum sheet 1 through an injection molding process, reducing the number of battery cell parts, facilitating assembly, reducing process costs, can also reduce process errors, ensuring that each battery cell has a sealing rubber particle, and reducing the risk of liquid leakage; by providing a stress relief groove 101 at the upper end of the sealing aluminum sheet 1, stress can be effectively released during laser welding of the sealing nail, increasing the welding yield and reducing the risk of liquid leakage.

[0019] As a preferred implementation in this embodiment, it should be further noted that a sealant pellet fixing hole is formed at the lower end of the sealing aluminum sheet 1, and the upper part of the sealant pellet 2 is fixedly connected to the sealant pellet fixing hole, thereby making the connection between the sealant pellet 2 and the sealing aluminum sheet 1 easier and more stable.

[0020] As a preferred implementation in this embodiment, it should be further noted that the sealant pellet fixing hole includes a first through hole and a second through hole that are coaxially connected from the outside to the inside. The first through hole is a round hole, and the second through hole is a tapered hole with an inner diameter that gradually increases from the outside to the inside. Moreover, the inner diameter of the end of the second through hole connected to the first through hole is smaller than the inner diameter of the first through hole, further improving the stable connection performance between the sealant pellet 2 and the sealing aluminum sheet 1.

[0021] As a preferred implementation in this embodiment, it should be further noted that a positioning hole 102 for visual positioning during the welding of the sealing nail is formed in the middle of the upper end of the sealing aluminum sheet 1, making the welding of the sealing nail more convenient and accurate.

[0022] As a preferred implementation in this embodiment, it should be further noted that the stress relief groove 101 is an annular groove, which can more effectively release the stress from all directions during the laser welding of the sealing nail, and further improve the welding yield.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An integrated sealing nail, characterized in that: The invention comprises a sealing aluminum sheet (1) and a sealing rubber particle (2), wherein the sealing rubber particle (2) is fixedly connected to the lower end of the sealing aluminum sheet (1) by means of an injection molding process; a stress release groove (101) is provided at the upper end of the sealing aluminum sheet (1); and a positioning hole (102) is provided in the middle of the upper end of the sealing aluminum sheet (1) for visual positioning when welding a sealing pin.

2. The integrated sealing nail according to claim 1, characterized in that: A sealing rubber particle fixing hole is provided at the lower end of the sealing aluminum sheet (1), and the upper part of the sealing rubber particle (2) is fixedly connected in the sealing rubber particle fixing hole.

3. The integrated sealing nail according to claim 2, characterized in that: The sealing rubber particle fixing hole includes a first through hole and a second through hole which are coaxially connected from the outside to the inside. The first through hole is a circular hole, and the second through hole is a tapered hole whose inner diameter increases from the outside to the inside, and the inner diameter of one end of the second through hole connected to the first through hole is smaller than the inner diameter of the first through hole.

4. An integrated sealing nail according to any one of claims 1 to 3, characterized in that: The stress release groove (101) is an annular groove.

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