CN213636121U

CN213636121U - Anti-deformation cylindrical battery shell

Info

Publication number: CN213636121U
Application number: CN202022176260.8U
Authority: CN
Inventors: 吴应强; 曾严
Original assignee: Dongguan Wotaitong New Energy Co ltd
Current assignee: Dongguan Langtaitong Technology Co.,Ltd.
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-07-06
Anticipated expiration: 2030-09-28

Abstract

The utility model discloses an anti-deformation cylindrical battery shell, which comprises a hollow cylindrical shell and a cover body; openings are formed in the ends, close to each other, of the shell and the cover body; one side of the shell, which is close to the opening, is provided with an anti-deformation component; the anti-deformation assembly comprises first limiting grooves which are formed in the inner wall of the shell and are arranged on two opposite sides of the inner wall of the shell along one diameter direction, and a first limiting rod arranged between the two first limiting grooves; the middle part of the first limiting rod is provided with a pole lug hole for a pole lug to pass through; the first limiting rod is sleeved with an insulating spring; when the cover body is tightly sleeved on the shell in an interference manner, the spring is pressed to press the inner wall of the shell along the direction away from each other. The utility model discloses a spring is established to the cover on first gag lever post, and spring pressurized back is applyed simultaneously to the inner wall of casing and is closed the opposite elasticity of pressure with the lid, maintains a stress balance state, avoids the casing to be close to open-ended one end and inwards contracts and produce deformation to bring the potential safety hazard.

Description

Anti-deformation cylindrical battery shell

[ technical field ] A method for producing a semiconductor device

The utility model relates to a battery assembly device technical field especially relates to a prevent cylinder battery case that deforms.

[ background of the invention ]

With the development of science and technology, lithium ion batteries are developed more and more widely. In the assembly process of the existing lithium battery, the enclosure and the cover body are usually closed by making the edge of the cover body into a rolling groove and then covering the edge of the cover body with the shell body. However, this method is cumbersome in assembly and may also require laser welding to enhance the strength of the connection. Therefore, the cover body and the shell are tightly sleeved in an interference fastening mode to be closed, and the cover has the advantages of being simple in assembling process and low in cost. However, the existing interference fastening method also has its own defects, which can cause the opening end of the casing to be forced to contract inwards to deform, and can also extrude the battery cell arranged in the casing while reducing the connection strength, thereby causing potential safety hazards such as short circuit.

In view of the above, it is desirable to provide an anti-deformation cylindrical battery case to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at providing a prevent cylinder battery case that deforms, when aiming at improving current battery case and adopting interference fastening equipment to assemble, lead to shell opening one end to be compelled to the problem that the internal contraction produced deformation, reduce the potential safety hazard risk because of deformation brings.

In order to achieve the above object, the present invention provides an anti-deformation cylindrical battery case, which comprises a hollow cylindrical case and a cover body; openings are formed in the ends, close to each other, of the shell and the cover body; one side of the shell, which is close to the opening, is provided with an anti-deformation component; the anti-deformation assembly comprises first limiting grooves which are formed in the inner wall of the shell and are arranged on two opposite sides of the inner wall of the shell along one diameter direction, and a first limiting rod arranged between the two first limiting grooves; the middle part of the first limiting rod is provided with a pole lug hole for a pole lug to pass through; the first limiting rod is sleeved with an insulating spring; when the cover body is tightly sleeved on the shell in an interference fit manner, the spring is pressed to press the inner wall of the shell along the direction away from each other.

In a preferred embodiment, a limiting block is arranged in the middle of the first limiting rod, and the lug hole penetrates through the limiting block; the number of the springs is two, and the springs are respectively sleeved on the parts, located on the two sides of the limiting block, of the first limiting rod.

In a preferred embodiment, the limiting block is further provided with a second limiting rod, and the second limiting rod is perpendicular to the first limiting rod; second limiting grooves are formed in two opposite sides of the inner wall of the shell along the direction of the second limiting rod; two ends of the second limiting rod are respectively positioned in the two second limiting grooves; the parts of the second limiting rod, which are positioned on the two sides of the limiting block, are provided with insulating springs, and the springs are pressed to press the inner wall of the shell along the direction away from each other.

In a preferred embodiment, a pressing piece is arranged on one side, close to the shell, of the bottom wall of the cover body, and a ring of first clamping teeth are arranged on the edge of the pressing piece; a circle of second clamping teeth are arranged on the surface of the end part of the shell, which is close to one side of the cover body; the first latch and the second latch are meshed to seal the end part of the shell with the pressing piece.

In a preferred embodiment, the first latch and the second latch are triangular in cross section.

In a preferred embodiment, the first latch and the second latch are rectangular in cross section.

In a preferred embodiment, the side wall of the cover body is provided with the first limiting ring parallel to the bottom wall of the cover body; a second limiting ring parallel to the first limiting ring is arranged on the outer wall of the shell close to one side of the cover body; when the cover body is sleeved with the shell, the second limiting ring is positioned between the first limiting ring and the bottom wall of the cover body.

In a preferred embodiment, the number of the first spacing rings is multiple, and the first spacing rings are arranged in parallel at intervals; the number of the second limiting rings is consistent with that of the first limiting rings, and the second limiting rings are arranged in parallel at intervals consistent with the interval distance between the adjacent first limiting rings; the plurality of first spacing rings and the plurality of second spacing rings are arranged in a staggered mode.

In a preferred embodiment, the surfaces of the first spacing ring and the second spacing ring are both in cambered surface transition.

The utility model discloses compare in prior art's beneficial effect and lie in: the inner wall of the shell is provided with a first limiting groove and a first limiting rod; the spring is sleeved on the first limiting rod, the effect of supporting the spring in a contracting mode is achieved, the spring is pressed and simultaneously exerts elastic force opposite to the covering pressure of the cover body on the inner wall of the shell, a stress balance state is maintained, and the situation that the shell is close to one end of the opening and deforms due to inward contraction is avoided, so that potential safety hazards are brought.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a front cross-sectional view of an anti-deformation cylindrical battery case provided by the present invention;

fig. 2 is a top cross-sectional view of the deformation-preventing cylindrical battery case shown in fig. 1.

Reference numbers in the figures: 100. an anti-deformation cylindrical battery case; 10. a housing; 20. a cover body; 30. an anti-deformation component; 31. a first limit groove; 32. a first limit rod; 33. a spring; 321. a pole ear hole; 322. a limiting block; 34. a second limiting rod; 35. a second limit groove; 21. a pressing part; 211. a first latch; 11. a second latch; 22. a first spacing collar; 12. and a second limiting ring.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

The embodiment of the utility model provides an in, provide a prevent deformation cylinder battery case 100 for carry out final assembly with electric core (not shown in the figure) and become finished product battery and seal electric core, prevent the electrolyte seepage, promote the seal of electric core equipment, simplify assembly process simultaneously, reduce the assembly degree of difficulty.

As shown in fig. 1, the deformation-preventing cylindrical battery case 100 includes a case 10 and a lid 20 each having a hollow cylindrical shape. The ends of the case 10 and the cover 20 close to each other are provided with openings. Specifically, the cover 20 and the housing 10 are both cylindrical, and have a receiving groove structure therein. The accommodating groove structure of the casing 10 is used for accommodating the battery cell, and the accommodating groove structure of the cover 20 is used for accommodating the casing 10 after the battery cell is assembled. During assembly, the cover 20 tightly fastens and sleeves the end, provided with the opening, of the casing 10, so as to complete the sealing of the battery cell.

As shown in fig. 1 and 2, the housing 10 is provided with a deformation preventing member 30 on a side thereof adjacent to the opening. The anti-deformation assembly 30 includes two first limiting grooves 31 and a first limiting rod 32 with two ends respectively extending into the two first limiting grooves 31. The first limiting grooves 31 are formed in two opposite sides of the inner wall of the housing 10 along a diameter direction, that is, the two first limiting grooves 31 are respectively located at two ends of one diameter of the circular cross section of the housing 10, the first limiting rod 32 is limited by the two first limiting grooves 31, and one end of the first limiting rod cannot fall off from the first limiting grooves 31. The middle part of the first limiting rod 32 is provided with a tab hole 321 for a tab to pass through, and specifically, the tab hole 321 is located at the center of the cross section of the casing 10 and is used for fixing the tab. The first limiting rod 32 is sleeved with an insulating spring 33, and the spring 33 can be made of insulating plastic and the like, so that the short circuit of the battery cell is avoided. When lid 20 interference fastening cup jointed in casing 10, spring 33 was in by the compression state, produced and closed the elasticity that pressure direction is opposite with lid 20 inner wall lid to keep away from the direction pressfitting each other with casing 10's inner wall, and then reach and prevent that casing 10 inner wall from being forced to produce the effect of deformation, avoid extrudeing potential safety hazards such as electric core causes the short circuit.

Further, in an embodiment, a limit block 322 is disposed in the middle of the first limit rod 32, and the tab hole 321 penetrates through the limit block 322. That is, the first limiting rod 32 can be regarded as two portions respectively located on two sides of the limiting block 322 on a straight line, and therefore, the number of the springs 33 is two, and the two portions of the first limiting rod 32 located on two sides of the limiting block 322 are respectively sleeved with the springs. Therefore, the situation that the elasticity of the spring 33 is influenced due to irreversible change caused by overlarge deformation amplitude of the compressed spring 33 is avoided.

Furthermore, the limiting block 322 is further provided with a second limiting rod 34, and the second limiting rod 34 is perpendicular to the first limiting rod 32 and is almost located on the same plane, that is, two ends of the first limiting rod 32 and two ends of the second limiting rod 34 are respectively located on four quadrant points of the cross section of the housing 10. The inner wall of the housing 10 is provided with second limiting grooves 35 along opposite sides of the second limiting rod 34, two ends of the second limiting rod 34 are respectively located in the two second limiting grooves 35, the second limiting rod 34 is limited only between the two second limiting grooves 35, and one end of the second limiting rod cannot fall off from the second limiting grooves 35. Similarly, the portions of the second limiting rod 34 located at the two sides of the limiting block 322 are both provided with insulating springs 33, and the inner walls of the shell 10 are pressed along the direction away from each other. Therefore, four quadrant points of the cross section of the shell 10 are supported by a cross structure, and the anti-deformation effect is further improved.

Further, in one embodiment, as shown in FIG. 1, a pressing member 21 is provided on a side of the bottom wall of the cover 20 close to the housing 10. It should be noted that the cover 20 and the housing 10 are both cylindrical groove structures, and both include a circular bottom wall and an annular side wall. Specifically, the pressing member 21 is annular and is attached and fixed to the bottom wall of the lid 20. The edge of the pressing member 21 is provided with a ring of first latch 211, that is, the first latch 211 is disposed concentrically with the bottom wall of the cover 20. The end surface of the casing 10 close to the cover 20 is provided with a ring of second latch 11. The second latch 11 surrounds the open end of the sidewall of the housing 10 in a ring shape, and has the same radius as the first latch 211. The cross sections of the first latch 211 and the second latch 11 are triangular or rectangular, that is, the first latch 211 and the second latch 11 are annular triangular or rectangular; meanwhile, the number of the two is the same, and one or more than one can be adopted. Therefore, the first latch 211 and the second latch 11 are engaged to seal the end of the casing 10 with the pressing member 21, and through the engagement of the gears, the contact area between the casing 10 and the cover 20 is increased, the sealing performance is improved, and the electrolyte of the battery cell in the casing 10 is prevented from leaking outwards.

Further, in one embodiment, as shown in fig. 1, a first limiting ring 22 is disposed in the side wall of the cover 20 and parallel to the bottom wall of the cover 20; the outer wall of the casing 10 near the cover 20 is provided with a second spacing ring 12 parallel to the first spacing ring 22. The surfaces of the first spacing ring 22 and the second spacing ring 12 are both cambered surface transition, which is convenient for the second spacing ring 12 to smoothly clamp through the first spacing ring 22. Furthermore, the number of the first spacing rings 22 is multiple, and the first spacing rings are arranged in parallel at intervals; the number of the second stop collars 12 is the same as the number of the first stop collars 22. The spacing distances between the adjacent first spacing rings 22 and the adjacent second spacing rings 12 are consistent, and the plurality of first spacing rings 22 and the plurality of second spacing rings 12 are arranged in a staggered manner. Therefore, when the cover 20 is sleeved with the housing 10, the second position-limiting ring 12 is located between the first position-limiting ring 22 and the bottom wall of the cover 20 to form a fastening structure, and the stability of the cover 20 in sleeving with the housing 10 is improved by the limiting and releasing action of the first position-limiting ring 22 on the second position-limiting ring 12. Particularly, the first limiting rings 22 and the second limiting rings 12 are engaged with each other in pairs to form a gear engagement structure, so as to further improve the connection stability between the housing 10 and the cover 20.

To sum up, the first limiting groove 31 and the first limiting rod 32 are arranged on the inner wall of the shell 10; the first limiting rod 32 is sleeved with a spring 33, so that a supporting effect is provided for the contraction of the spring 33, the spring 33 is pressed and simultaneously exerts an elastic force opposite to the covering pressure of the cover body 20 on the inner wall of the shell 10, a stress balance state is maintained, and the phenomenon that the end, close to the opening, of the shell 10 is inwardly contracted to generate deformation is avoided, so that potential safety hazards are brought.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. An anti-deformation cylindrical battery shell is characterized by comprising a shell body and a cover body which are both in a hollow cylindrical shape; openings are formed in the ends, close to each other, of the shell and the cover body; one side of the shell, which is close to the opening, is provided with an anti-deformation component; the anti-deformation assembly comprises first limiting grooves which are formed in the inner wall of the shell and are arranged on two opposite sides of the inner wall of the shell along one diameter direction, and a first limiting rod arranged between the two first limiting grooves; the middle part of the first limiting rod is provided with a pole lug hole for a pole lug to pass through; the first limiting rod is sleeved with an insulating spring; when the cover body is tightly sleeved on the shell in an interference fit manner, the spring is pressed to press the inner wall of the shell along the direction away from each other.

2. The deformation-resistant cylindrical battery case according to claim 1, wherein a limiting block is disposed in the middle of the first limiting rod, and the lug hole penetrates through the limiting block; the number of the springs is two, and the springs are respectively sleeved on the parts, located on the two sides of the limiting block, of the first limiting rod.

3. The deformation-resistant cylindrical battery case according to claim 2, wherein the stopper is further provided with a second stopper rod, and the second stopper rod is perpendicular to the first stopper rod; second limiting grooves are formed in two opposite sides of the inner wall of the shell along the direction of the second limiting rod; two ends of the second limiting rod are respectively positioned in the two second limiting grooves; the parts of the second limiting rod, which are positioned on the two sides of the limiting block, are provided with insulating springs, and the springs are pressed to press the inner wall of the shell along the direction away from each other.

4. The deformation-resistant cylindrical battery case of claim 1, wherein a pressing member is provided on a side of the bottom wall of the lid body close to the case body, and a ring of first latch teeth is provided on an edge of the pressing member; a circle of second clamping teeth are arranged on the surface of the end part of the shell, which is close to one side of the cover body; the first latch and the second latch are meshed to seal the end part of the shell with the pressing piece.

5. The deformation-resistant cylindrical battery case of claim 4, wherein the first latch and the second latch are triangular in cross-section.

6. The deformation-resistant cylindrical battery case of claim 4, wherein the first latch and the second latch are rectangular in cross-section.

7. The deformation-resistant cylindrical battery case according to claim 1, wherein the side wall of the lid body is provided with a first stopper ring parallel to the bottom wall of the lid body; a second limiting ring parallel to the first limiting ring is arranged on the outer wall of the shell close to one side of the cover body; when the cover body is sleeved with the shell, the second limiting ring is positioned between the first limiting ring and the bottom wall of the cover body.

8. The deformation-preventing cylindrical battery case according to claim 7, wherein the first retainer rings are provided in plural numbers and arranged in parallel at intervals; the number of the second limiting rings is consistent with that of the first limiting rings, and the second limiting rings are arranged in parallel at intervals consistent with the interval distance between the adjacent first limiting rings; the plurality of first spacing rings and the plurality of second spacing rings are arranged in a staggered mode.

9. The deformation-resistant cylindrical battery case according to claim 7, wherein the surfaces of the first retainer ring and the second retainer ring are both in arc transition.