CN218385469U

CN218385469U - Cylindrical battery shell sealing mechanism

Info

Publication number: CN218385469U
Application number: CN202222652646.0U
Authority: CN
Inventors: 王国东
Original assignee: Anhui Wanyi Science and Technology Co Ltd
Current assignee: Anhui Wanyi Science and Technology Co Ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-01-24
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a sealing mechanism of a cylindrical battery shell, which comprises a sealing base body with an opening at one end and a closed end at the other end, wherein a stepped cavity for inserting the cylindrical battery shell is arranged in the sealing base body; a plurality of first sealing bodies and a plurality of first intermediate bodies are arranged in the stepped cavity, the first sealing bodies and the first intermediate bodies are distributed at intervals, the first sealing bodies are sealing bodies with elastic deformation capacity, the first sealing bodies and the first intermediate bodies are of annular structures, and the first sealing bodies and the first intermediate bodies are sleeved on the outer wall of the cylindrical battery shell; a gap is formed between the end of the cylindrical battery shell and the cavity bottom of the stepped cavity. The utility model discloses can seal cylinder battery case's tip on cylinder battery case's radial direction to accomplish cylinder battery case's gas tightness and detect. By this means, the problem of sealing the cylindrical battery case at its end in the prior art can be effectively solved.

Description

Cylindrical battery shell sealing mechanism

Technical Field

The utility model relates to an air tightness detection technology, in particular to cylinder battery case sealing mechanism.

Background

The cylindrical battery shell has thinner wall thickness, and the explosion-proof structure is generally positioned on the cylindrical shell, so the shell needs to be subjected to air tightness detection. Because the casing is thin, the phenomenon of cutting the sealing ring easily appears when the casing carries out end face seal, causes the sealing ring life-span short, and it is frequent to change, and not only the reliability is poor, and use cost is high, and the time consuming and power consuming of change operation moreover.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiencies in the prior art, the present invention provides a sealing mechanism for a cylindrical battery case to solve the problems pointed out by the background art.

The utility model provides a technical scheme that its technical problem adopted does: a sealing mechanism of a cylindrical battery shell comprises a sealing base body with one open end and the other closed end, wherein a stepped cavity used for being inserted into the cylindrical battery shell is arranged in the sealing base body;

a plurality of first sealing bodies and a plurality of first intermediate bodies are arranged in the stepped cavity, the first sealing bodies and the first intermediate bodies are distributed at intervals, the first sealing bodies are sealing bodies with elastic deformation capacity, the first sealing bodies and the first intermediate bodies are of annular structures, and the first sealing bodies and the first intermediate bodies are sleeved on the outer wall of the cylindrical battery shell;

a gap is formed between the end of the cylindrical battery shell and the cavity bottom of the stepped cavity.

Optionally, the first sealing body is a rubber sealing ring, and the first intermediate body is a hard annular block.

Optionally, when the cylindrical battery shell is in a sealed state, the first seal body is tightly attached to the outer wall of the cylindrical battery shell and the inner wall of the stepped cavity.

Optionally, a plurality of second sealing bodies and a plurality of second intermediates are arranged inside the cylindrical battery shell, and the second sealing bodies and the first sealing bodies are both of annular structures.

Optionally, the second sealing body is a rubber sealing ring, and the second intermediate body is a hard annular block.

Adopt above-mentioned technical scheme, compared with the prior art, the utility model, it can seal cylinder battery case's tip on cylinder battery case's radial direction to accomplish cylinder battery case's gas tightness and detect. Through this mode, can effectual solution prior art, the problem that causes is sealed to it at the tip of cylinder battery case.

Drawings

Fig. 1 is a state diagram of the cylindrical battery case of the present invention when it is not sealed;

fig. 2 is a state diagram of the cylindrical battery case of the present invention when sealed.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and fig. 2, the utility model discloses a cylinder battery case sealing mechanism, this mechanism include one end opening, other end confined sealing base 1, are equipped with the ladder chamber 3 that is used for inserting cylinder battery case 2 in the sealing base 1.

The utility model discloses in, be equipped with a plurality of first seals 4 and a plurality of first midbody 5 in ladder chamber 3, interval distribution on cylindrical battery case 2's outer wall between first seal 4 and the first midbody 5, and first seal 4 is the seal that has elastic deformation ability, first seal 4 and first midbody 5 are the loop configuration, and first seal 4 all overlaps at cylindrical battery case 2's outer wall with first midbody 5, first seal 4 all can follow cylindrical battery case 2's outer wall with first midbody 5 and slide. During sealing, the driving unit can drive the first intermediate body 5 to extrude towards the direction of the first sealing body 4, so that the first sealing body 4 is pressed to expand, and the two ends of the first sealing body 4 are respectively in close contact with the inner wall of the stepped cavity 3 and the outer wall of the cylindrical battery shell 2 to realize sealing. The driving unit may employ a ram, and the ram is contacted and pressed with the first intermediate body 5 and the second intermediate body 7 by a mechanical device to move the first intermediate body 5 and the second intermediate body 7 toward the step cavity 3.

Furthermore, the utility model discloses in, because the wall thickness of cylinder battery case 2 is little, take unilateral sealing, cause cylinder battery case 2 to warp easily, consequently, also be provided with second seal 6 and second midbody 7 in the inside of cylinder battery case 2, second seal 6 and first seal 4 one-to-one for second seal 6 and first seal 4 form the clamping state to the wall portion of cylinder battery case 2. Specifically, at the axis position in ladder chamber 3, be equipped with the back shaft 8 that is used for cup jointing second seal 6 and second midbody 7, simultaneously, be equipped with the cylinder 9 that sets up along the axis in the chamber bottom position in ladder chamber 3, the diameter of cylinder 9 is greater than the diameter of back shaft 8 for form the step between cylinder 9 and the back shaft 8, moreover, the tip of cylinder 9 is located same radial plane with the step position in ladder chamber 3.

The utility model discloses in, insert the back in ladder chamber 3 with cylinder battery housing 2, have the clearance between the tip of cylinder battery housing 2 and the chamber end in ladder chamber 3.

The utility model discloses in, the first seal 4, the second seal 6 of adoption are rubber seal, and first midbody 5 and second midbody 7 are stereoplasm annular block. The first sealing body 4 and the second sealing body 6 have the same thickness, and the first intermediate body 5 and the second intermediate body 7 have the same thickness.

When sealing the cylindrical battery case 2, firstly, preparing a sealing base 1, a first sealing body 4, a second sealing body 6, a first intermediate body 5 and a second intermediate body 7, and inserting the cylindrical battery case 2 into the stepped cavity 3 of the sealing base 1, wherein a gap is formed between the end part of the cylindrical battery case 2 and the cavity bottom of the stepped cavity 3; secondly, sequentially sleeving a first sealing body 4 and a first intermediate body 5 on the outer wall of the cylindrical battery shell 2 to ensure that the first sealing body 4 and the first intermediate body 5 are distributed at intervals, and sleeving a second sealing body 6 and a second intermediate body 7 into a supporting shaft 8 to ensure that the second sealing body 6 and the second intermediate body 7 are distributed at intervals; and finally, extruding the first intermediate body 5 and the second intermediate body 7 through the driving unit to enable the first sealing body 4 and the second sealing body 6 to deform from the middle to two ends, and enabling the inner wall and the outer wall of the cylindrical battery shell 2 and the inner wall of the stepped cavity 3 to be tightly attached to the first sealing body 4 and the second sealing body 6 to finish sealing.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features disclosed herein, and that other combinations of features disclosed herein or their equivalents, in any combination, are also encompassed by the invention without departing from the spirit of the invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Besides the technical features described in the specification, other technical features are known to those skilled in the art, and are not described herein again in order to highlight the innovative features of the present invention.

Claims

1. A sealing mechanism for a cylindrical battery shell is characterized by comprising a sealing base body with one open end and the other closed end, wherein a stepped cavity for inserting the cylindrical battery shell is arranged in the sealing base body;

2. The cylindrical battery housing seal mechanism of claim 1, wherein said first seal body is a rubber seal ring and said first intermediate body is a hard annular block.

3. The cylindrical battery housing seal mechanism of claim 2, wherein the first seal body is in intimate contact with the outer wall of the cylindrical battery housing and the inner wall of the stepped cavity when the cylindrical battery housing is in the sealed state.

4. The cylindrical battery case sealing mechanism according to claim 3, wherein a plurality of second sealing bodies and a plurality of second intermediate bodies are provided inside the cylindrical battery case, and the second sealing bodies and the first sealing bodies are both of an annular structure.

5. The cylindrical battery housing seal mechanism of claim 4, wherein said second seal body is a rubber seal ring and said second intermediate body is a hard annular block.