Lithium ion battery sealing nail

Abstract

The utility model discloses a lithium ion battery sealing nail, which belongs to the technical field of battery sealing nails and comprises a sealing nail body, a top groove is arranged on the sealing nail body, and the concave depth of the top groove is 0.5-1.5 mm. The rubber plug is installed in a liquid injection opening of a battery, the rubber plug and the sealing nail body are integrally formed, and the rubber plug is of a cylindrical structural body. According to the lithium ion battery sealing nail disclosed by the utility model, the sealing nail body and the rubber plug form an integrated structure, the original two station steps are changed into one step, so that the production efficiency of a production line is improved, the sealing nail body is provided with the top groove, so that the sealing nail body has a space to release stress during welding, and the sealing nail body is prevented from being damaged. The crack phenomenon caused by stress release during welding is reduced, the qualified rate of batteries is increased, and the production income is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery sealing nail technical field especially relates to a lithium ion battery sealing nail. BACKGROUND

[0002] Battery sealing nail is the important component of battery pack, especially plays the key role in the assembly process of square aluminum shell lithium ion battery, it is mainly used for closing the liquid injection port after electrolyte injection battery, and realizes the sealing of battery through laser welding. This process is the last process of the cell assembly section, aims at realizing the isolation of battery cell and external environment, forms the sealed electrochemical system, thereby guaranteeing the sealing safety, reliability and overall performance of battery.

[0003] The existing sealing nail is usually split type structure, needs to put the sealing rubber plug into the liquid injection port first, then puts the sealing nail and welds, the existing sealing nail is flat face structure, during laser seam welding, due to the stress relation of material itself, welding can appear crack phenomenon, crack can influence battery sealing, leads to the decrease of battery qualification rate, and the sealing rubber plug and sealing nail are split type, need two-step operation, has certain influence on production line efficiency. UTILITY MODEL CONTENT

[0004] The utility model overcomes the insufficient of prior art, provides a lithium ion battery sealing nail to solve the problem in prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a lithium ion battery sealing nail, including

[0006] The sealing nail body is provided with a top groove, and the inner recess depth of the top groove is 0.5-1.5mm.

[0007] The rubber plug is installed in the liquid injection port of the battery, and the rubber plug is integrally formed with the sealing nail body, and the rubber plug is a cylindrical structure.

[0008] In a preferred embodiment of the utility model, the edge width of the sealing nail body is 0.6-2.0mm.

[0009] In a preferred embodiment of the utility model, the sealing nail body is provided with a cylindrical protrusion, and the cylindrical protrusion is embedded in the rubber plug and integrally formed with the rubber plug.

[0010] In a preferred embodiment of the utility model, the sealing nail body, the cylindrical protrusion and the rubber plug are coaxially arranged.

[0011] In a preferred embodiment of the utility model, the top groove is located at the center position of the sealing nail body.

[0012] The utility model solves the defects in the background art, the utility model has the following beneficial effects:

[0013] The lithium ion battery sealing nail of the utility model forms integral structure with the sealing nail body and the rubber plug, changes from two work station steps to one step, thereby improves the production efficiency of the production line, the sealing nail body is provided with top recess, makes the sealing nail body have space to release stress when welding, reduces the crack phenomenon caused by stress release problem when welding, improves the battery qualification rate, improves the production income. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further described below in combination with the drawings and examples;

[0015] Figure 1 It is the overall structure schematic view of preferred embodiment of the utility model;

[0016] Figure 2 It is the top view of preferred embodiment of the utility model;

[0017] Figure 3 It is Figure 2 The sectional view of A-A surface;

[0018] In the drawing: 10, sealing nail body; 11, top recess; 12, cylindrical protrusion; 20, rubber plug. DETAILED DESCRIPTION

[0019] The plurality of embodiments of the utility model will be disclosed below by drawing, for the purpose of clear description, many details on the actual object will be described in the following description. However, it should be understood that these details on the actual object should not be used to limit the utility model. That is to say, in some embodiments of the utility model, these details on the actual object are unnecessary. In addition, for the purpose of simplifying the drawing, some conventional structures and components will be drawn in a simple schematic way in the drawing.

[0020] In addition, in the utility model, the description such as "first", "second" is only for the purpose of description, and is not the meaning of special order or sequence, and is not used to limit the utility model, which is only for distinguishing the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0021] The embodiment provides a lithium ion battery sealing nail, which integrates a sealing nail body 10 and a rubber plug 20 into an integral structure, changes two original steps into one step, thereby improving the production efficiency of a production line, the sealing nail body 10 is provided with a top groove 11, so that the sealing nail body 10 has space to release stress during welding, reduces crack phenomenon caused by stress release during welding, improves the qualified rate of the battery, and improves production benefits.

[0022] In combination Figures 1 to 3 As shown in the figure, the lithium ion battery sealing nail of the embodiment comprises a sealing nail body 10 and a rubber plug 20, the rubber plug 20 is integrally formed with the sealing nail body 10, the sealing nail body 10 and the rubber plug 20 are integrated into an integral structure, and two original steps are changed into one step, thereby improving the production efficiency of a production line.

[0023] In the embodiment, the sealing nail body 10 is provided with a top groove 11, the inner recess depth of the top groove 11 is 0.5-1.5 mm, the size guarantees the strength of the sealing nail body 10 and can release welding stress of the sealing nail body 10 during welding, so as to reduce crack phenomenon of the sealing nail body 10 caused by stress during welding, further improve the qualified rate of the battery, and the edge width of the sealing nail body 10 is 0.6-2.0 mm, the size guarantees the welding qualified rate and sealing performance of the sealing nail body 10 and can guarantee that the edge width is not too wide to cause welding stress to be unable to be released.

[0024] Further, in the embodiment, the rubber plug 20 is installed in a liquid injection port of a battery, the rubber plug 20 is a cylindrical structure, the sealing nail body 10 is provided with a cylindrical protrusion, the cylindrical protrusion 12 is embedded in the rubber plug 20 and integrally formed with the rubber plug 20, the rubber plug 20 of the embodiment is a structure of polypropylene material plus ethylene-propylene terpolymer, which can seal the liquid injection port.

[0025] In the embodiment, the sealing nail body 10, the cylindrical protrusion 12 and the rubber plug 20 are coaxially arranged, and the top groove 11 is located at the center position of the sealing nail body 10.

[0026] In actual use, the lithium ion battery sealing nail of the embodiment is installed at a liquid injection port position of a battery, the lithium ion battery sealing nail integrates the sealing nail body 10 and the rubber plug 20 into an integral structure, changes two original steps into one step, thereby improving the production efficiency of a production line, the sealing nail body 10 is provided with a top groove 11, so that the sealing nail body 10 has space to release stress during welding, reduces crack phenomenon caused by stress release during welding, improves the qualified rate of the battery, and improves production benefits.

[0027] While the present application has been described with reference to various embodiments, it will be understood that many modifications and variations of the present application are possible, as they will occur to those skilled in the art in the scope of the application. That is, the methods, systems, or devices discussed above are examples. It is contemplated that various processes or components can be added, omitted, modified, and / or combined in various manners. For example, in alternative configurations, the methods can be performed in different orders than those described, and / or various stages can be added, omitted, and / or combined. Also, features described with respect to certain configurations can be combined in various other configurations. Different aspects and elements of configurations can be combined in similar fashion. Also, many of the elements described herein are well known in the art. It is also contemplated that the various elements and features could be implemented using software, hardware, firmware, middleware, code, or any combination thereof. Also, techniques, systems, and elements described with respect to the various configurations can be implemented as discrete or integrated devices.

[0028] In the description specific details are set forth in order to provide a thorough understanding of the exemplary configurations including implementations. However, configurations can be practiced without these specific details, e.g., an apparatus can be practiced using fewer than the specific number of elements described above, an apparatus can be practiced using structures other than those described above, and / or an apparatus can be practiced using a different arrangement of elements than those described above. In other instances, well-known structures and techniques have not been described in order to avoid obscuring the configurations being presented. This description provides example configurations only, and is not intended to limit or restrict the scope, applicability, or configurations of the claims. Rather, the preceding description of the configurations will provide enabling descriptions for a skilled artisan to implement the described technologies. Various changes can be made to the function and arrangement of elements without departing from the spirit of the disclosure.

[0029] Also, although each of the operations can be described as a sequential process, many of the operations can occur in parallel, or concurrently. In addition, the order of the operations can be re-arranged. A process might have other steps not discussed for the sake of brevity. Also, the example method can be implemented through hardware, software, firmware, middleware, code, or any combination thereof. When implemented in software, code, or code segments, the various processes can be stored in a non-transitory computer-readable medium such as a storage medium, and executed by a processor as necessary.

[0030] In closing, it is to be understood that the embodiments described above are merely exemplary of the application and should not be considered limiting and that certain changes and modifications might vary widely as a matter of logic and technique for adapting the implementations to a particular situation. It is therefore contemplated to cover in the appended claims all such changes and modifications that fall within the spirit and scope of the applications. Such embodiments of the inventive subject matter may, of course, be employed in any number of embodiments and of like applications other than those described above. None, therefore, of the aspects or elements of the applications should be deemed critical, essential, or indispensable, and the application as described encompasses any and all embodiments and phases thereof.

Claims

1. A sealing nail for a lithium-ion battery, characterized in that, include A sealing nail body (10) is provided with a top groove (11) and the inner depth of the top groove (11) is 0.5-1.5mm. A rubber stopper (20) is installed inside the battery's liquid filling port. The rubber stopper (20) is integrally formed with the sealing nail body (10). The rubber stopper (20) is a cylindrical structure.

2. The lithium-ion battery sealing nail according to claim 1, characterized in that, The edge width of the sealing nail body (10) is 0.6-2.0 mm.

3. A lithium-ion battery sealing nail according to claim 1, characterized in that, The sealing nail body (10) is provided with a cylindrical protrusion, which is embedded in the rubber plug (20) and integrally formed with the rubber plug (20).

4. A lithium-ion battery sealing nail according to claim 3, characterized in that, The sealing nail body (10), the cylindrical protrusion (12), and the rubber plug (20) are arranged coaxially.

5. A lithium-ion battery sealing nail according to claim 1, characterized in that, The top groove (11) is located at the center of the sealing nail body (10).

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