CN218069995U

CN218069995U - Battery shell and battery

Info

Publication number: CN218069995U
Application number: CN202222010688.4U
Authority: CN
Inventors: 刘飞; 武冬冬; 金敏
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-12-16
Anticipated expiration: 2032-08-01

Abstract

The utility model discloses a battery case and battery relates to the battery field. The battery shell comprises a shell main body, wherein the shell main body comprises a plurality of shell walls, and the shell walls jointly enclose a containing cavity for containing a battery cell; at least one of the shell walls is provided with a pressure relief portion, and the pressure relief portion is obtained by thinning the wall thickness of the corresponding shell wall. The utility model provides a battery case can promote the pressure release effect of battery.

Description

Battery shell and battery

Technical Field

The utility model relates to a battery field particularly, relates to a battery case and battery.

Background

At present, for a square battery, a mode of welding an explosion-proof valve on a top cover is generally adopted to realize pressure relief and explosion prevention.

In fact, the welding quality of the explosion-proof valve can seriously affect the actual explosion pressure and air tightness of the explosion-proof valve, so that the pressure relief effect is unstable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery case, its pressure release effect that can promote the battery.

Another object of the utility model is to provide a battery, it has the more reliable and stable characteristics of pressure release effect.

The utility model provides a technical scheme:

a battery case comprising a case body comprising a plurality of case walls that collectively enclose a housing cavity for housing a battery cell;

and at least one of the shell walls is provided with a pressure relief part, and the pressure relief part is obtained by reducing the wall thickness of the corresponding shell wall.

Further, the inner surface and/or the outer surface of the pressure relief portion are/is concavely provided with annular grooves.

Further, the cross section of the ring groove is V-shaped or U-shaped.

Further, the ring groove is coaxial with the pressure relief portion.

Further, the inner surface of the pressure relief portion is flush with the inner surface of the corresponding housing wall, and the outer surface of the pressure relief portion is recessed relative to the outer surface of the corresponding housing wall.

Further, the outer surface of the pressure relief portion is flush with the outer surface of the corresponding housing wall, and the inner surface of the pressure relief portion is recessed relative to the inner surface of the corresponding housing wall.

Further, the outer surface of the pressure relief portion is recessed with respect to the outer surface of the corresponding housing wall, and the inner surface of the pressure relief portion is recessed with respect to the inner surface of the corresponding housing wall.

Further, the plurality of shell walls comprise a bottom wall and a side wall, and the relief portion is arranged on the bottom wall and/or the side wall.

Further, the thickness of the relief portion is smaller than the wall thickness of the plurality of housing walls.

The utility model also provides a battery, including aforementioned battery case, battery case includes the shell main part, the shell main part includes a plurality of conch walls, a plurality of conch walls enclose into the holding chamber that is used for holding the electric core jointly; and at least one of the shell walls is provided with a pressure relief part, and the pressure relief part is obtained by thinning the wall thickness of the corresponding shell wall.

Compared with the prior art, the utility model provides a battery case, attenuate thickness obtains the relief portion in the casing main part, realizes explosion-proof effect. The pressure relief portion and the shell wall are integrally formed, so that the influence of welding quality on blasting parameters and air tightness is avoided. Therefore, the utility model provides a battery case's beneficial effect includes: the pressure relief effect of the battery can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is a cross-sectional view of a battery case provided by an embodiment of the present invention;

fig. 2 is a cross-sectional view of a battery case according to another embodiment of the present invention;

fig. 3 is a cross-sectional view of a battery case according to another embodiment of the present invention.

Icon: 100-a battery housing; 110-a housing body; 111-a bottom wall; 1111-a pressure relief portion; 1112-a ring groove; 112-a side wall; 113-a containing cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that a product of the present invention is usually placed when used, or orientations or positional relationships that a person skilled in the art usually understands, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Examples

Referring to fig. 1, fig. 1 is a cross-sectional view of a battery case 100 according to the present embodiment.

The battery casing 100 provided by the embodiment includes a casing main body 110, and the casing main body 110 includes a plurality of casing walls, and the plurality of casing walls jointly enclose a containing cavity 113 for containing the battery cells. At least one of the plurality of shell walls is provided with a relief portion 1111, and the relief portion 1111 is obtained by thinning the wall thickness of the corresponding shell wall.

In this embodiment, the housing main body 110 is a rectangular parallelepiped structure, the plurality of housing walls include a bottom wall 111 and a plurality of side walls 112 erected on the periphery of the bottom wall 111, the bottom wall 111 and the plurality of side walls 112 enclose a rectangular accommodating cavity 113 with an open top, and the pressure relief portion 1111 is disposed on the bottom wall 111. In other embodiments, relief 1111 may also be disposed on sidewall 112.

The relief portion 1111 is integrally formed with the bottom wall 111, and in practical production, the relief portion 1111 may be formed by thinning a certain thickness on the outer surface or the inner surface of the bottom wall 111 by a punching process. It is understood that the outer surface and the inner surface referred to in this embodiment are described with reference to the receiving cavity 113, and the surface surrounding the receiving cavity 113 is the inner surface, and the surface contacting with the outside is the outer surface.

It can be seen that, in this embodiment, thereby the shaping relief portion 1111 on diapire 111 attenuate thickness, relief portion 1111 has played the same effect with welding the relief valve on the top cap among the prior art, can realize the blasting pressure release of fixed point. Compared with the prior art, the pressure relief portion 1111 is directly formed on the shell wall and integrally formed with the shell wall, so that a welding process is omitted, the influence of the welding process on actual blasting pressure and air tightness is eliminated, and the pressure relief effect is greatly improved.

And, having removed welding relief valve on the top cap from for the top cap obtains bigger usable area, can realize arranging each component more rationally.

In this embodiment, the inner surface of the relief portion 1111 is flush with the inner surface of the bottom wall 111, and the outer surface of the relief portion 1111 is recessed relative to the outer surface of the bottom wall 111. That is, in the production process, the thickness of the bottom wall 111 is reduced by punching on the outer surface of the bottom wall 111, so that the relief portion 1111 is formed, and the outer surface of the relief portion 1111 and the outer surface of the bottom wall 111 form a stepped structure.

Referring to fig. 2, fig. 2 is a cross-sectional view of a battery case 100 according to another embodiment.

In this embodiment, the outer surface of the relief portion 1111 is flush with the outer surface of the bottom wall 111, and the inner surface of the relief portion 1111 is recessed relative to the inner surface of the bottom wall 111. That is, in the production process, the thickness of the bottom wall 111 is reduced by punching on the inner surface of the bottom wall 111, so that the relief portion 1111 is formed, and the inner surface of the relief portion 1111 and the inner surface of the bottom wall 111 form a stepped structure.

Referring to fig. 3, fig. 3 is a cross-sectional view of a battery case 100 according to another embodiment.

In this embodiment, the outer surface of the relief portion 1111 is recessed relative to the outer surface of the bottom wall 111, and the inner surface of the relief portion 1111 is recessed relative to the inner surface of the bottom wall 111. That is, in the production process, the thickness of the bottom wall 111 is reduced by punching at the positions corresponding to the inner surface and the outer surface of the bottom wall 111, so as to form the relief portion 1111, the outer surface of the relief portion 1111 and the outer surface of the bottom wall 111 form a stepped structure, and the inner surface of the relief portion 1111 and the inner surface of the bottom wall 111 form a stepped structure.

It will be appreciated that in other embodiments, the relief portion 1111 may be die cut into the interior and/or exterior surfaces of the side wall 112 as well, as the relief portion 1111 is formed into the side wall 112 of the housing body 110.

It should be noted that, whether the relief portion 1111 is formed on the bottom wall 111 or the side wall 112, the thickness of the relief portion 1111 should be smaller than the thickness of all other housing walls, i.e. the minimum pressure-bearing strength at the relief portion 1111 is ensured. Therefore, through the thickness of the pressure relief portion 1111 that is controlled in the actual production process, when the pressure in the accommodating cavity 113 reaches the pressure relief threshold value, the pressure relief portion 1111 is exploded to relieve pressure.

In addition, in order to ensure that the pressure relief portion 1111 can be blasted in time, in the embodiment, an annular groove 1112 is coaxially and concavely arranged on the outer surface of the pressure relief portion 1111, and the thickness of the pressure relief portion 1111 in the path of the annular groove 1112 is further reduced, that is, a specific area of blasting is further defined. In actual manufacturing, the ring groove 1112 is formed on the outer surface of the pressure relief portion 1111 by a stamping process, and in other embodiments, the ring groove 1112 may be formed on the inner surface of the pressure relief portion 1111.

In addition, in order to concentrate stress and realize rapid explosion and pressure relief, in this embodiment, the cross section of the annular groove 1112 is V-shaped, and in other embodiments, the shape of the annular groove 1112 may be adjusted according to actual application conditions, for example, the annular groove 1112 may be adjusted to have a U-shaped cross section.

To sum up, the battery case 100 provided by the embodiment can improve the pressure relief effect of the battery, is stable and reliable, can save the available area of the top cover, and optimizes the arrangement mode of each element.

The present embodiment further provides a battery, which includes the battery case 100, and in addition to the battery case 100, the battery further includes conventional elements such as a battery core, an adaptor, and a lower plastic, i.e., a top cover, which are not described in the present embodiment. Therefore, the battery that this embodiment provided has the more reliable and stable characteristics of pressure release effect equally, and manufacturing cost is lower, the security is higher.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery shell is characterized by comprising a shell main body, wherein the shell main body comprises a plurality of shell walls, and the shell walls jointly enclose a containing cavity for containing a battery cell;

and at least one of the shell walls is provided with a pressure relief part, and the pressure relief part is obtained by thinning the wall thickness of the corresponding shell wall.

2. The battery shell according to claim 1, wherein the inner surface and/or the outer surface of the pressure relief portion is/are recessed with a ring groove.

3. The battery case according to claim 2, wherein the ring groove has a V-shaped or U-shaped cross section.

4. The battery case of claim 2, wherein the ring groove is disposed coaxially with the relief portion.

5. The battery case of claim 1, wherein an inner surface of the pressure relief portion is flush with an inner surface of the corresponding wall, and an outer surface of the pressure relief portion is recessed relative to an outer surface of the corresponding wall.

6. The battery case according to claim 1, wherein an outer surface of the pressure relief portion is flush with an outer surface of the corresponding wall, and an inner surface of the pressure relief portion is recessed with respect to an inner surface of the corresponding wall.

7. The battery case according to claim 1, wherein an outer surface of the pressure relief portion is recessed with respect to an outer surface of the corresponding wall, and an inner surface of the pressure relief portion is recessed with respect to an inner surface of the corresponding wall.

8. The battery case according to claim 1, wherein the plurality of housing walls include a bottom wall and a side wall, and the relief portion is provided on the bottom wall and/or the side wall.

9. The battery case according to claim 1, wherein the thickness of the pressure relief portion is smaller than the wall thickness of the plurality of the shell walls.

10. A battery comprising a battery housing according to any one of claims 1 to 9.