阅读说明：本技术 一种具有抽真空、注液功能的电池泄爆结构 (Battery explosion venting structure with vacuumizing and liquid injection functions ) 是由 张三学 雷政军 翟腾飞 刘毅 郑高锋 于 2021-08-04 设计创作，主要内容包括：本申请公开了一种具有抽真空、注液功能的电池泄爆结构,包括壳体,设置在所述壳体内的泄爆结构,所述泄爆结构包括用于密封所述壳体第一通孔的阀瓣、设置在所述阀瓣凹槽内且用于限制所述阀瓣移动的第一弹性件、与所述阀瓣连接且用于调整所述第一弹性件弹力和所述阀瓣位置的调整结构；其中,所述调整结构与所述壳体连接。本申请结构简单,可将抽真空、注液、泄爆三个功能集为一体,一个通孔利于电池的密封,还可以重复多次使用。(The application discloses a battery explosion venting structure with vacuumizing and liquid injection functions, which comprises a shell and an explosion venting structure arranged in the shell, wherein the explosion venting structure comprises a valve clack used for sealing a first through hole of the shell, a first elastic piece arranged in a groove of the valve clack and used for limiting the movement of the valve clack, and an adjusting structure connected with the valve clack and used for adjusting the elasticity of the first elastic piece and the position of the valve clack; wherein the adjustment structure is connected with the housing. This application simple structure can be as an organic whole with the three function collection of evacuation, notes liquid, let out and explode, and a through-hole does benefit to the sealed of battery, can also repeat the repetitious usage.)

1. A battery explosion venting structure with vacuumizing and liquid injection functions comprises a shell and an explosion venting structure arranged in the shell, and is characterized in that the explosion venting structure comprises a valve clack used for sealing a first through hole of the shell, a first elastic piece arranged in a groove of the valve clack and used for limiting the movement of the valve clack, and an adjusting structure connected with the valve clack and used for adjusting the elasticity of the first elastic piece and the position of the valve clack;

wherein the adjustment structure is connected with the housing.

2. The battery explosion venting structure with vacuum pumping and liquid filling functions as claimed in claim 1, comprising a sealing member disposed below the valve flap, wherein the sealing member seals the first through hole of the housing.

3. The battery explosion venting structure with vacuum pumping and liquid injection functions as claimed in claim 2, wherein the sealing member is fixedly connected to the bottom surface of the valve flap.

4. The battery explosion venting structure with vacuum pumping and liquid filling functions as claimed in claim 2, wherein the bottom of the groove of the valve flap is provided with a plurality of second through holes along the edge.

5. The battery explosion venting structure with vacuum pumping and liquid injection functions as claimed in claim 1, wherein the adjusting structure comprises a main adjusting structure for adjusting the threshold value of the explosion venting structure, and a secondary adjusting structure for displacing the valve flap.

6. The battery explosion venting structure with vacuum pumping and liquid injection functions as claimed in claim 5, wherein the main adjusting structure is an adjusting nut.

7. The battery explosion venting structure with vacuum pumping and liquid injection functions as claimed in claim 6, wherein the secondary adjustment structure comprises: the bolt column, the pressing sheet, the elastic nut and the second elastic piece;

the lower end of the bolt column penetrates through the first elastic piece to be connected with the center of the valve clack groove, and the upper end of the bolt column penetrates through a third through hole in the center of the pressing sheet and a gasket to be connected with the elastic nut;

the second elastic piece is arranged between the valve clack and the shell;

wherein, the preforming realizes spacingly through main adjustment structure.

8. The battery explosion venting structure with vacuum pumping and liquid injection functions as claimed in claim 7, wherein the first elastic member and the second elastic member are springs.

Technical Field

The application relates to the technical field of lithium batteries, in particular to a battery explosion venting structure with vacuumizing and liquid injection functions.

Background

Electrolyte substances are arranged in the lithium battery, the electrolyte substances are vaporized and expanded after being overheated, when the electrolyte substances are expanded to a certain internal pressure, the welding joint of the battery shell can be cracked, the cracked crack is leaked, and the leaked electrolyte is very easy to ignite or explode.

At present, the cover body of the lithium battery is generally provided with an exhaust hole, a vacuum pumping hole and a liquid injection hole, and the cover body is also welded with an explosion venting film for the safety of the battery. These holes and the welded structure have a certain influence on the sealing of the battery. Wherein, the explosion venting reliability of the explosion venting film is to be solved.

Patent number CN201812870U discloses a power lithium cell ball formula relief valve, including valve gap, valve body, spring, ball valve, sealing washer, be provided with spring and ball valve in its valve body, the bottom is provided with the ladder through-hole in the valve body, is provided with the sealing washer in the last rank downthehole, and the ball valve supports in sealing washer and through-hole, valve gap and the hookup of valve body hole, the spring lower extreme support on the ball valve, the spring upper end supports on the valve gap, can realize evacuation and sealed explosion-venting function.

Patent number CN211852920U discloses a well open formula safety valve, including the valve body, its inside axial accommodation space that has, the spring sets up in the valve body, can stretch out and draw back along the axial in the valve body, and the sealing member is transversal personally submitting type of falling T part, and the sealing member is pegged graft with the recess, and the upper end of sealing member penetrates the one end contact with the spring in to the recess from the through-hole, and the lower tip of sealing member is located the recess outside, can peg graft with first gas outlet. The invention can make the valve clack opening height between the micro-opening and the full-opening.

Patent No. CN211852926U discloses a micro-open type high pressure safety valve, similar to the safety valve disclosed in patent No. CN211852920U, the inlet and outlet of the valve body are vertical.

The valve body disclosed by the prior art and the patent only has a simple explosion venting or vacuum pumping structure, and does not have the function of combining vacuum pumping, liquid injection and explosion venting.

Disclosure of Invention

In order to solve the technical problem, the technical scheme adopted by the application is as follows:

the embodiment of the application provides a battery explosion venting structure with vacuumizing and liquid injection functions, which comprises a shell and an explosion venting structure arranged in the shell, wherein the explosion venting structure comprises a valve clack used for sealing a first through hole of the shell, a first elastic piece arranged in a groove of the valve clack and used for limiting the movement of the valve clack, and an adjusting structure connected with the valve clack and used for adjusting the elasticity of the first elastic piece and the position of the valve clack; wherein the adjustment structure is further connected with the housing.

In embodiments provided herein, a seal disposed below the valve flap is included, the seal sealing the first through-hole of the housing. The sealing element is fixedly connected to the bottom surface of the valve clack. And a plurality of second through holes are formed in the bottom of the valve clack groove along the edge.

In the embodiment provided by the application, the adjusting structure comprises a main adjusting structure used for adjusting the threshold value of the explosion venting structure and a secondary adjusting structure used for enabling the valve clack to displace. The main adjusting structure is an adjusting nut. The sub-adjustment structure includes: the bolt column, the pressing sheet, the elastic nut and the second elastic piece; the lower end of the bolt column penetrates through the first elastic piece to be connected with the center of the valve clack groove, and the upper end of the bolt column penetrates through a third through hole in the center of the pressing sheet and a gasket to be connected with the elastic nut; the second elastic piece is arranged between the valve clack and the shell; wherein, the preforming realizes spacingly through main adjustment structure.

In embodiments provided herein, the first and second elastic members are springs.

This application uses earlier main adjustment structure will let out and explode the structure adjustment to required threshold value, when battery internal pressure reached the threshold value, makes valve clack/sealing member take place the displacement under the combined action of the inside atmospheric pressure of battery and second elastic component, realizes letting out and explodes the function. When the battery is vacuumized or injected with liquid, the secondary adjusting structure is adjusted to enable the first elastic piece and the valve body to contract and drive the sealing piece to leave the sealing port, so that the battery and the explosion venting structure are communicated, vacuumizing and/or liquid injection operation is performed, and after the operation is completed, the secondary adjusting structure is adjusted to enable the first elastic piece to recover to the original state.

The adjusting structure of the application does not change the original explosion venting pressure threshold.

This application simple structure can realize evacuation, notes liquid, let out and explode the function, and single tube mouth does benefit to the sealed of battery, can also repeat the repetitious usage.

Additional advantages, objects, and features of the application will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of the overall structure of the embodiment of the present application.

FIG. 2 is a schematic view of a valve flap according to an embodiment of the present disclosure.

Fig. 3 is an internal structural anatomical diagram of an embodiment of the present application.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

The terms "first" and "second," and the like, in the description and in the claims of the embodiments of the present application are used for distinguishing between different objects and not for describing a particular order of the objects.

In the description of the embodiments of the present application, terms such as "upper" and "lower" are explained based on the drawings of the present application, and do not represent a specific positional relationship.

In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified.

The technical solution of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 3, an embodiment of the present application provides a battery explosion venting structure with vacuum pumping and liquid injection functions, including a housing 1 and an explosion venting structure disposed in the housing 1, where the explosion venting structure includes a valve flap 2 for sealing a first through hole 8 of the housing 1, a first elastic member 4 disposed in a groove of the valve flap 2 and used for limiting movement of the valve flap 2, and an adjusting structure connected to the valve flap 2 and used for adjusting an elastic force of the first elastic member 4 and a position of the valve flap; wherein the adjustment structure is further connected with the housing 1.

Optionally, in order to ensure the sealing performance of the valve flap 2 and the first through hole 8, in the embodiment provided by the present application, a flexible sealing member 7 is included below the valve flap 2, and the first through hole 8 of the housing 1 is sealed by using the sealing member 7.

Further, in the embodiment provided by the present application, the sealing member 7 is fixedly connected to the bottom surface of the valve flap 2, and the worker can select different connection modes.

Optionally, in order to guarantee the effective quick eruption of gas in the battery during pressure release, perhaps inside electrolyte can be effective quick entering battery during notes liquid, in the embodiment that this application provided, 2 recess bottoms of valve clack are equipped with a plurality of second through-holes 6 along the edge, and the setting can avoid sealing member 7 to shelter from second through-hole 6 at the bottom edge.

It can be understood that, in order to realize the function of explosion venting or liquid injection, in the embodiment provided by the application, the adjusting structure comprises a main adjusting structure 3 for adjusting the threshold value of the explosion venting structure, and a secondary adjusting structure 5 for displacing the valve flap.

Optionally, the main adjusting structure 3 is an adjusting nut.

Optionally, the secondary adjustment structure 5 includes: a bolt column 51, a pressing sheet 54, a loose nut 52 and a second elastic member 9; the lower end of the bolt column 51 passes through the first elastic piece 4 to be connected with the center of the groove of the valve clack 2, and the upper end of the bolt column 51 passes through a third through hole (not shown) in the center of the pressing piece 54 and a gasket 53 to be connected with the elastic nut 52; the second elastic piece is arranged between the valve clack and the shell and used for assisting the air pressure in the battery to jack the valve clack/sealing piece open so that the interior of the battery and the explosion venting structure form a passage for facilitating pressure relief; wherein, the pressing sheet 54 is limited by the adjusting nut.

Further, a third through hole (not shown) is formed in the center of the pressing piece 54, and the inner diameter of the third through hole is larger than the outer diameter of the bolt column.

In the embodiments provided herein, preferably, the first elastic member and the second elastic member are springs.

The working principle of this application does: this application uses earlier main adjustment structure 3 will let out and explode the structure and adjust to required threshold value, when battery internal pressure reached the threshold value, make valve clack/sealing member take place the displacement under the combined action of battery inside atmospheric pressure and second elastic component, make the battery with let out explode the structure intercommunication, realize letting out explode the function.

When battery evacuation or notes liquid, adjust inferior adjustment structure 5 makes first elastic component 4 and valve clack 4 shrink, drive sealing member 7 leaves first through-hole 8, makes the battery and let out and explode the structure intercommunication to carry out the evacuation or annotate the liquid operation, after the operation is accomplished, adjust inferior adjustment structure 5 makes first elastic component 4 resumes to the original state, realizes annotating liquid/evacuation function.

Although the embodiments of the present application have been disclosed above, they are not limited to the applications listed in the description and the embodiments. It can be applied in all kinds of fields suitable for the present application. Additional modifications will readily occur to those skilled in the art. Therefore, the application is not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.