CN217182288U

CN217182288U - Casing and cylindrical battery

Info

Publication number: CN217182288U
Application number: CN202221040927.4U
Authority: CN
Inventors: 单雪燕
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-04-30
Filing date: 2022-04-30
Publication date: 2022-08-12
Anticipated expiration: 2032-04-30

Abstract

The utility model discloses a casing and cylinder battery, this casing mainly used cylinder battery, this casing include lateral wall, discoid bottom and top cap, and wherein the lateral wall is cylindric, and discoid bottom is connected to the bottom of lateral wall, and the top cap is connected to the top of lateral wall, and the top cap is equipped with towards the inside sunken depressed part of lateral wall, and the depressed part is formed by the top of top cap towards bottom roll extrusion. The utility model discloses be equipped with the depressed part on the top cap of casing, thereby make the top cap have certain resilience, after the cylinder battery produced steam, perhaps the cylinder battery is extruded at the use kind of back, the lateral wall is along radially extruding the top cap, can be along radial inside application of force towards after the top cap periphery atress, and then make the depressed part be close to each other and warp along radial both sides, external force removes the back, the depressed part both sides are along radial reconversion, thereby make the top cap also can resume to original state, and then can make the cylinder battery can maintain the prototype.

Description

Casing and cylindrical battery

Technical Field

The utility model relates to a lithium cell field of making, concretely relates to casing and cylinder battery.

Background

As one of the most core components of new energy vehicles, lithium ions have the advantages of high energy density, long cycle life, safety, environmental protection, and the like, so that lithium batteries are becoming the mainstream direction of the electric era.

Lithium ion batteries are morphologically divided into hard shell batteries, soft package batteries and cylindrical batteries, wherein the cylindrical batteries gradually become the mainstream direction of the market along with the development of the technology due to the advantages of high volume energy density, simple structure, easy grouping, convenience for standardization and the like.

The cylindrical battery comprises a shell and a cylindrical battery core. The shell comprises a top cover, a bottom cover and a side wall, the top cover and the bottom cover are respectively connected to the top and the bottom of the side wall, the cylindrical battery cell is installed in the shell, two output poles are arranged at two ends of the cylindrical battery cell, one output pole is a negative pole, the negative pole is close to the top cover and is output through the top cover, the other output pole is a positive pole, the positive pole is close to the bottom cover and is output through a rivet of the bottom cover, and the rivet and the bottom cover are arranged in an insulating mode.

The cylinder battery can produce steam at the in-process of using to make inflation in the middle of the lateral wall, and the top can extrude the top cap and make the top cap warp, and the top cap warp the back, generally is difficult for kick-backing, and then makes the whole discovery of cylinder battery deformation, influences the use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a casing and cylinder battery to solve the problem that exists among the above-mentioned prior art.

In order to solve the above problem, according to an aspect of the present invention, there is provided a case for a cylindrical battery, the case including:

a sidewall, the sidewall being cylindrical;

a disk-shaped bottom cover connected to a bottom of the side wall;

the top cover, the top cover is connected to the top of lateral wall, just the top cover is equipped with the orientation the inside sunken depressed part of lateral wall, the depressed part by the top of top cover is towards the bottom roll extrusion and is formed.

In one embodiment, the width dimension of the recess in the radial direction gradually decreases from the top to the bottom of the housing.

In one embodiment, the recess extends in a circumferential direction of the top cover.

In one embodiment, the recess is located at an edge of the top cover.

In one embodiment, the depressed part is annular, the top cover is provided with an explosion-proof valve, and the explosion-proof valve and the depressed part are arranged at a radial interval and are positioned at the radial inner part of the depressed part.

In one embodiment, the top cover is further provided with a protrusion, the protrusion extends along the circumferential direction of the top cover, and the outer periphery of the protrusion is connected with the inner periphery of the concave part.

In one embodiment, the recess is located in the center of the top cover.

In one embodiment, the recess is circular in radial cross-section.

The utility model discloses still relate to a cylinder battery, include:

the above-mentioned housing;

the cylindrical battery cell is arranged in the shell, and the negative electrode of the cylindrical battery cell is positioned at the top of the shell;

the adapter is connected with the top cover and the negative pole of the cylindrical battery cell.

In one embodiment, the adaptor comprises:

the adapter plate is connected with the negative electrode of the cylindrical battery cell;

the connecting piece, the connecting piece is the Z type is folding, and follows the folding one end of connecting piece Z type is connected the switching piece, the other end is connected the bottom of depressed part.

The utility model discloses be equipped with the depressed part on the top cap of casing, thereby make the top cap have certain resilience, after the cylinder battery produced steam, perhaps the cylinder battery is after the use kind is extruded, the lateral wall is along radial extrusion top cap, can be along radial inside application of force towards after the top cap periphery atress, and then make the depressed part be close to each other and warp along radial both sides, external force removes the back, the depressed part both sides are along radial reconversion, thereby make the top cap also can resume to original state, and then can make the cylinder battery can maintain the prototype.

Drawings

Fig. 1 is a schematic view of a top cover according to an embodiment of the present invention.

Fig. 2 is a schematic view of a top cover according to another embodiment of the present invention.

Fig. 3 is a schematic view of a top cover according to yet another embodiment of the present invention.

Fig. 4 is a schematic view of the top cap of the embodiment shown in fig. 1 applied to a cylindrical battery.

Reference numerals: 100. a cylindrical battery; 1. a top cover; 11. a recessed portion; 12. a side wall; 13. a disc-shaped bottom cover; 14. a protrusion; 15. an explosion-proof valve; 2. a cylindrical cell; 3. an adapter; 31. a patch; 32. a connecting member.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment can be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

The utility model relates to a casing, this casing mainly used cylindrical battery 100, this casing include lateral wall 12, discoid bottom 13 and top cap 1, and wherein lateral wall 12 is cylindric, and discoid bottom 13 is connected to the bottom of lateral wall 12, and top cap 1 is connected to the top of lateral wall 12, and top cap 1 is equipped with the depressed part 11 towards the inside sunken of lateral wall 12, and depressed part 11 is formed by the top of top cap 1 towards bottom roll extrusion. The utility model discloses be equipped with depressed part 11 on top cap 1 of casing, thereby make top cap 1 have certain resilience, after cylinder battery 100 produces steam, perhaps cylinder battery 100 is extruded at the use kind, lateral wall 12 is along radial extrusion top cap 1, can be along radial inside application of force towards after the top cap 1 periphery atress, and then make depressed part 11 be close to each other and warp along radial both sides, external force removes the back, the radial reconversion of depressed part 11 both sides, thereby make top cap 1 also can resume to original state, and then can make cylinder battery 100 can maintain the prototype.

Alternatively, the width dimension of the recess 11 in the radial direction is gradually reduced from the top to the bottom of the housing. As shown in fig. 1, the recess 11 is open towards the top, with the radial dimension at the opening being greater than the radial dimension at the bottom of the recess 11. In addition, the inner wall of depressed part 11 along radial both sides can be the cambered surface, also can be other shapes, and in the embodiment of fig. 1, depressed part 11 is trapezoidal, and depressed part 11 both sides are the inclined plane, and the inclined plane of depressed part 11 both sides is the symmetry setting moreover, and of course, the inclined plane of both sides also can asymmetric setting, does not influence the utility model discloses an implement.

Alternatively, in one embodiment, the recess 11 extends in the circumferential direction of the top cover 1, and as shown in fig. 1 and 4, the recess 11 is an annular groove as a whole when viewed from the top of the top cover 1, and the recess 11 can be restored when the top cover 1 is pressed at any of the outer peripheries thereof.

Optionally, the recess 11 is located at the edge of the top cover 1. The concave part 11 is closer to the top cover 1, so that the top cover 1 is more favorably deformed after being squeezed, and the original shape of the top cover 1 is also favorably restored as soon as possible. The distance between the recess 11 and the top cover 1 may be designed according to the size of the cylindrical battery 100, and in addition, the size of the recess 11 also needs to be designed according to the size of the cylindrical battery 100 and the energy density of the cylindrical battery 100, and the size of the recess 11 is not limited herein.

Optionally, the top cover 1 is provided with an explosion-proof valve 15, the explosion-proof valve 15 and the recess 11 being radially spaced apart and located radially inward of the recess 11. When the thermal runaway of the cylindrical battery 100 occurs, the explosion-proof valve 15 is blown away by the hot air inside the cylindrical battery 100, and the heat dissipation of the hot air is allowed, so that the heat is prevented from being accumulated inside the cylindrical battery 100, and the runaway of the whole electronic device is caused. It should be understood that the explosion-proof valve 15 may be disposed at other positions of the top cover 1 by those skilled in the art, and the position of the explosion-proof valve 15 is not limited herein.

Optionally, in another embodiment, the top cover 1 is further provided with a protrusion 14, the protrusion 14 extends along the circumferential direction of the top cover 1, and the outer circumference of the protrusion 14 is connected with the inner circumference of the recess 11. As shown in fig. 2, the protrusion 14 is formed by the bottom of the top cover 1 being concave towards the top, and the protrusion 14 and the concave part 11 are combined, so that the top cover 1 has greater resilience in the radial direction, and the top cover 1 can be quickly restored after being pressed and deformed. The projection 14 and the recess 11 may be provided at an interval, and the projection 14 may be provided on the outer periphery of the recess 11, and the positional relationship between the projection 14 and the recess 11 is not limited herein. Also, the shape of the projection 14 is not limited.

Alternatively, in another embodiment, the recess 11 is located in the center of the top cover 1. As shown in fig. 3, the recess 11 is located at the center of the top cover 1, and the periphery of the recess 11 is close to the edge of the top cover 1, and the sidewall 12 of the recess 11 along the radial direction can make the top cover 1 have certain resilience to prevent the top cover 1 from being deformed by compression.

Alternatively, with continued reference to fig. 3, the recess 11 is circular in radial cross-section, with the side wall 12 of the recess 11 being cambered. It should be understood that the shape of the recess 11 is not limited herein, and the recess 11 may be formed in other shapes by those skilled in the art. In addition, the size and depth of the recess 11 may be designed according to the size of the cylindrical battery 100, and are not limited herein.

The utility model discloses still relate to a cylindrical battery 100, as shown in FIG. 4, this cylindrical battery 100 includes cylinder electricity core 2, adaptor 3 and foretell casing, wherein, the casing has confined accommodation space, and cylinder electricity core 2 installs in the casing, the both ends of cylinder electricity core 2 have anodal and negative pole, and the anodal bottom of being close to the casing, the negative pole is located the top of casing, and adaptor 3 can electrically conduct, and adaptor 3 connects the negative pole of top cap 1 and cylinder electricity core 2 for with the current output of negative pole.

Further, with continued reference to fig. 4, the adaptor 3 includes an adaptor piece 31 and a connecting piece 32, wherein the adaptor piece 31 is connected to the negative electrode of the cylindrical battery cell 2, and the connecting piece 32 is folded along the "Z" shape of the axis of the cylindrical battery cell, and one end of the connecting piece 31 along the "Z" shape of the connecting piece 32 is connected to the bottom of the recess 11, and the other end is connected to the bottom of the recess. In the manufacturing process of the cylindrical battery 100, the adaptor sheet 31 is welded to the negative electrode of the cylindrical battery core 2 by laser, and then the bottom of the concave part 11 of the top cover 1 and the top of the adaptor 3 are welded by laser welding, so that the top cover 1 can transmit a circuit. Additionally, in the embodiment of FIG. 4, the attachment member 32 may be folded radially once, although it should be understood that in other embodiments, the attachment member 32 may be folded radially multiple times. In addition, in the embodiment of fig. 1 and 3, the connecting member 32 may be connected to the top of the recess 11, and in the embodiment of fig. 2, the dimensions of the recess 11 and the protrusion 14 in the radial direction are relatively small, so that the connecting member 32 may be connected to the vicinity of the center of the top cover 1.

The utility model discloses a change top cap 1's shape to make top cap 1 after receiving radial extrusion, all can the quick recovery original state, maintain cylindrical battery 100's original state then.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. A housing for a cylindrical battery, the housing comprising:

a sidewall, the sidewall being cylindrical;

a disk-shaped bottom cover connected to a bottom of the side wall;

2. The housing of claim 1, wherein the recess tapers in width dimension in the radial direction from the top to the bottom of the housing.

3. The housing of claim 2, wherein the recess extends circumferentially of the top cover.

4. The housing of claim 3, wherein the recess is located at an edge of the top cover.

5. The housing of claim 4, wherein the recess is annular and the top cover is provided with an explosion-proof valve, the explosion-proof valve being radially spaced from and radially inward of the recess.

6. The housing of claim 2, wherein the top cover further comprises a protrusion extending circumferentially along the top cover, and an outer periphery of the protrusion is connected to an inner periphery of the recess.

7. The housing of claim 1, wherein the recess is located in a center of the top cover.

8. The housing of claim 7, wherein the recess is circular in radial cross-section.

9. A cylindrical battery, comprising:

the housing of any one of claims 1-8;

10. The cylindrical battery as claimed in claim 9, wherein the adaptor comprises: