CN217719807U

CN217719807U - Composite shell and battery

Info

Publication number: CN217719807U
Application number: CN202221849895.2U
Authority: CN
Inventors: 张佩; 武冬冬; 金敏
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-11-01
Anticipated expiration: 2032-07-18

Abstract

The utility model discloses a composite housing and battery relates to the battery field. This compound shell includes aluminium system shell and first insulation inside lining, and first insulation inside lining sets up in the inside of aluminium system shell, and first insulation inside lining encloses into the accommodation space that is used for holding electric core. The utility model provides a composite housing can alleviate battery weight to can prevent that the shell from being corroded by the electrolyte.

Description

Composite shell and battery

Technical Field

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

Background

At present, in order to reduce the overall weight of the lithium ion battery, aluminum shells are often used for packaging in the market.

With the increase of the service time, the aluminum shell is easily corroded by the electrolyte, so that the liquid leakage phenomenon is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a composite housing, it can lighten battery weight to can prevent that the shell from receiving the electrolyte and corroding.

Another object of the present invention is to provide a battery, which has the advantages of lighter weight and higher safety.

The utility model provides a technical scheme:

the utility model provides a composite shell, includes aluminium system shell and first insulating inside lining, first insulating inside lining set up in the inside of aluminium system shell, just first insulating inside lining encloses into the accommodation space that is used for holding electric core.

Further, the inner side wall of the aluminum outer shell is attached to the outer side wall of the first insulating lining, and/or,

the inner bottom wall of the aluminum outer shell is attached to the outer bottom wall of the first insulating liner.

Further, the thickness of the first insulating liner is in a range of 5 μm to 1000 μm.

Further, the aluminum can has a thickness in a range of 50 μm to 500 μm.

Further, the density of the first insulating liner is less than the density of the aluminum outer shell.

Further, the first insulating liner is configured to be injection molded from an organic polymer insulating material;

the first insulating liner is bonded to the aluminum housing.

Further, the first insulating liner is configured to be overmolded on an inner wall of the aluminum outer shell by an organic polymer insulating material.

The utility model also provides a battery, reach including electric core compound shell, compound shell includes aluminium system shell and first insulation inside lining, first insulation inside lining set up in the inside of aluminium system shell, just first insulation inside lining encloses into the accommodation space, electric core holding in the accommodation space.

Further, the battery also comprises a composite top cover, the composite top cover comprises an aluminum top cover and a second insulating lining arranged on one side of the aluminum top cover, and the second insulating lining covers the accommodating space.

Furthermore, an electrode post is arranged on the aluminum top cover, and an electrode lug of the battery cell is connected with the electrode post with the same polarity on the aluminum top cover through a switching piece.

Compared with the prior art, the utility model provides a composite housing is formed by aluminium system shell and first insulation bush complex, and utensil weight is lighter. And first insulation bush encloses into the accommodation space and is used for holding electric core to realized the isolation to aluminium system shell and electrolyte, avoided aluminium system shell to receive electrolyte corruption. Therefore, the utility model provides a composite housing's beneficial effect includes: the weight of the battery can be reduced and the case can be prevented from being corroded by the electrolyte.

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 partial structural sectional view of a battery according to an embodiment of the present invention.

An icon: 100-a composite shell; 110-aluminum housing; 120-a first insulating liner; 121-an accommodating space; 200-a composite top cover; 210-aluminum top cover; 220-second insulating liner.

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 present invention, presented in the accompanying drawings, 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 in the present invention, all other embodiments obtained by a person skilled in the art without 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 is to 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 are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, 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 partial sectional view of a battery provided in this embodiment.

The battery provided in this embodiment includes a composite housing 100 and a composite top cap 200, and further includes conventional components such as a battery core and an interposer, which are not described in this embodiment.

The composite casing 100 includes an aluminum casing 110 and a first insulating lining 120, the first insulating lining 120 is disposed inside the aluminum casing 110, and the first insulating lining 120 encloses an accommodating space 121 for accommodating the battery cells.

Compared with a steel shell configured by a part of existing batteries, the aluminum shell 110 is lighter in weight, and the first insulating bush encloses the accommodating space 121 for accommodating the battery cell, so that the aluminum shell 110 is isolated from the electrolyte, and the electrolyte is prevented from corroding the aluminum shell 110.

In this embodiment, the inner sidewall of the aluminum outer shell 110 is attached to the outer sidewall of the first insulating liner 120, and the inner bottom wall of the aluminum outer shell 110 is attached to the outer bottom wall of the first insulating liner 120, i.e. there is no gap between the aluminum outer shell 110 and the first insulating liner 120.

In other embodiments, the arrangement of the first insulating bush in the aluminum outer shell 110 may also be adjusted according to practical application requirements, for example, only the outer side wall of the first insulating bush circumferentially fits the inner side wall of the aluminum outer shell 110, and a gap exists between the outer bottom wall of the first insulating bush and the inner bottom wall of the aluminum outer shell 110. Alternatively, only the outer bottom wall of the first insulating bush circumferentially abuts the inner bottom wall of the aluminum outer shell 110, and a circumferentially surrounding gap exists between the outer side wall of the first insulating bush and the inner side wall of the aluminum outer shell 110.

In order to prevent the first insulation bushing from being excessively heavy to increase the overall weight of the composite casing 100, in the present embodiment, the density of the first insulation bushing is lower than that of the aluminum casing 110.

In order to prevent the first insulating bush from being corroded by the electrolyte and form effective insulation protection, the material of the first insulating bush is actually an organic polymer, and may include one or more of polystyrene, polyvinylidene fluoride, polyvinyl chloride, polycarbonate, and the like.

In the actual manufacturing process, the organic polymer may be coated on the inner sidewall and the inner bottom wall of the aluminum outer shell 110, and the first insulating bush attached to the inner wall of the aluminum outer shell 110 may be obtained by curing after the coating.

In addition, a liquid organic polymer may be injected into a prepared module by injection molding, and after curing and molding, the first insulating bushing may be obtained by drawing a mold, in which case, the first insulating bushing may be connected to the aluminum housing 110 by gluing, bonding, hot pressing, or the like.

In this embodiment, the thickness of the first insulating liner 120 is controlled to be in the range of 5 μm to 1000 μm, and the thickness of the aluminum outer shell 110 is in the range of 50 μm to 500 μm, taking the protective and insulating ability and the lightweight effect into consideration.

The composite top cap 200 includes an aluminum top cap 210 and a second insulating liner 220 disposed on one side of the aluminum top cap 210, wherein the second insulating liner 220 covers the accommodating space 121.

In fact, one side of the aluminum top cover 210 is attached to one side of the second insulating lining 220, and in this embodiment, the second insulating lining 220 is the same as the first insulating lining 120, and is also an organic polymer, and may include one or more of polystyrene, polyvinylidene fluoride, polyvinyl chloride, and polycarbonate.

In the production of the composite top cap 200, a liquid organic polymer may be directly coated on one side of the aluminum top cap 210 and cured to be formed. Similarly, the cured second insulating lining 220 may be separately prepared by injection molding, and the second insulating lining 220 and the aluminum top cover 210 are connected by gluing, bonding, hot pressing, and the like.

Like the composite casing 100, in the present embodiment, the thickness of the second insulating liner 220 is also in the range of 5 μm to 1000 μm, and the thickness of the aluminum top cover 210 is in the range of 50 μm to 500 μm.

It can be understood that the aluminum top cover 210 is provided with a pole, and the pole ear of the battery cell is connected with the pole with the same polarity on the aluminum top cover 210 through the adapter sheet. The second insulating liner 220 serves to isolate the aluminum top cap 210 from the electrolyte, protecting the aluminum top cap 210 from the electrolyte.

In summary, the composite housing 100 and the composite top cover 200 of the battery provided by the embodiment both have the characteristics of light weight and corrosion resistance, and therefore, the battery provided by the embodiment has the characteristics of lighter weight, longer service life and higher safety.

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. The utility model provides a composite shell, its characterized in that includes aluminium system shell and first insulating inside lining, first insulating inside lining set up in the inside of aluminium system shell, just first insulating inside lining encloses into the accommodation space that is used for holding electric core.

2. The composite shell of claim 1, wherein an inner sidewall of the aluminum shell is conformed to an outer sidewall of the first insulating liner, and/or,

3. The composite shell of claim 2, wherein the thickness of the first insulating liner is in a range of 5 μ ι η to 1000 μ ι η.

4. The composite shell of claim 2, wherein the aluminum shell has a thickness in a range of 50 μ ι η to 500 μ ι η.

5. The composite shell of claim 2, wherein the first insulating liner has a density less than a density of the aluminum shell.

6. The composite shell of any of claims 1-5, wherein the first insulating liner is configured to be injection molded from an organic polymer insulating material;

the first insulating liner is bonded to the aluminum housing.

7. The composite shell of any of claims 1-5, wherein the first insulating liner is configured to be coated from an organic polymer insulating material on an inner wall of the aluminum shell.

8. A battery comprising a cell and the composite casing of any one of claims 1-7, wherein the cell is accommodated in the accommodating space.

9. The battery of claim 8, further comprising a composite top cover comprising an aluminum top cover and a second insulating liner disposed on one side of the aluminum top cover, the second insulating liner covering the receiving space.

10. The battery of claim 9, wherein the aluminum top cover is provided with a pole, and the pole ear of the battery cell is connected with the pole with the same polarity on the aluminum top cover through an adapter sheet.