CN220368005U

CN220368005U - Battery case

Info

Publication number: CN220368005U
Application number: CN202321966905.5U
Authority: CN
Inventors: 李敏
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2024-01-19
Anticipated expiration: 2033-07-25

Abstract

The battery shell comprises a shell body, wherein at least one opening is formed in the shell body, a cover body for sealing the opening is arranged at the opening, a thickened body which is arranged around the opening is formed on the shell body, and the thickness of the thickened body is gradually increased along the corresponding opening direction; the thickening body is formed on the outer surface of the shell; compared with the prior art, through the thickening body that sets up in casing opening part, and the thickness of thickening body increases gradually along corresponding open-ended direction, and the lid sets up on the opening, and the thickness of casing opening part is greater than the thickness of casing main part region, has guaranteed the joint strength of lid and casing opening part, has reduced the manufacturing cost of battery simultaneously, has improved the energy density of battery.

Description

Battery case

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery shell.

Background

With the rapid development of new energy industry, especially in the field of lithium batteries, applications such as energy storage, new energy vehicles, ships and the like gradually use lithium batteries as power sources or reserve energy sources. In order to reduce multiple strings in a system or pack and improve the consistency of lithium batteries in products; meanwhile, the energy density of the lithium battery is improved, the cost of the lithium battery is reduced, and a single battery with larger capacity needs to be developed.

In the process of developing larger single batteries, the connection strength of the battery shell, the bottom plate and the top cover needs to be improved as the volume and the weight of the batteries are increased along with the capacity, so that the mechanical strength of the battery shell is ensured, and the damage and the leakage in the production, the transportation and the actual use processes are prevented. However, when the case link strength of the larger unit cell is increased, it is often necessary to increase the thickness of the case, which significantly reduces the energy density of the battery and also increases the manufacturing cost of the battery.

The chinese patent of application number 201310042935.1 discloses battery case, and above-mentioned disclosed battery case includes the casing, is equipped with the utmost point post on the casing, the utmost point post includes positive electrode post and negative electrode post, its characterized in that: a shell cover is further arranged above the shell, a wire connecting hole is formed in the side portion of the shell cover, corresponding to the pole, and an operating hole is formed in the top of the shell cover, corresponding to the pole. The battery post is arranged in the battery shell cover, so that the battery post is not exposed, the battery post is effectively protected, the possibility of battery short circuit caused by collision of the battery post is reduced, the safety performance of the battery is improved, the vibration resistance of the battery is enhanced, the structure is simple, the manufacture is convenient, and the production cost is reduced.

In the prior art disclosed in the above, the battery shell is designed to have a uniform thickness, and the thickness of the shell is closely related to the welding strength, so that when the welding strength and stability of the shell and the top cover or the bottom plate are ensured, the shell is required to ensure a certain thickness, and when the weight or volume of the required single battery is large, or the welding strength requirement of the product application working condition on the battery is high, the thicker aluminum shell is required to be used for ensuring the welding strength and stability of the shell, thus the manufacturing cost of the battery is intangibly increased, the energy density of the battery is reduced, and the product loses competitiveness.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the battery shell which can improve the energy density of the battery, reduce the manufacturing cost of the battery and improve the welding strength of the battery shell.

In order to achieve the above object, the present utility model adopts the following technical scheme: the battery shell comprises a shell body, wherein at least one opening is formed in the shell body, a cover body for sealing the opening is arranged at the opening, a thickened body which is arranged around the opening is formed on the shell body, and the thickness of the thickened body is gradually increased along the corresponding opening direction; the thickening body is formed on the outer surface of the shell.

As a preferable mode of the utility model, the shell is a hollow structure with the opening formed at the top, and the top of the shell is provided with a top cover covering the opening.

As a preferred embodiment of the present utility model, the size of the top cover corresponds to the size of the opening.

As a preferable mode of the utility model, the top cover is welded at the opening.

As a preferred embodiment of the utility model, the top of the thickened body is flush with the top of the housing.

As a preferred embodiment of the present utility model, the housing has a hollow structure in which the openings are formed at the top and bottom, and two of the openings are located at opposite ends of the housing.

As a preferable mode of the utility model, the top of the shell is provided with a top cover for covering the opening at the top, and the bottom of the shell is provided with a bottom plate for covering the opening at the bottom.

As a preferred aspect of the present utility model, the top cover is sized to conform to the size of the opening at the top and the bottom plate is sized to conform to the size of the opening at the bottom.

As a preferred embodiment of the present utility model, the top and bottom of the housing are each formed with a thickened body disposed around the opening corresponding thereto.

As a preferred embodiment of the present utility model, the top cover is welded to the top opening, and the bottom plate is welded to the bottom opening.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the thickening body arranged at the opening of the shell, the thickness of the thickening body is gradually increased along the direction corresponding to the opening, the cover body is arranged on the opening, the thickness of the opening of the shell is larger than that of the main body area of the shell, the connection strength of the cover body and the opening of the shell is ensured, meanwhile, the manufacturing cost of the battery is reduced, and the energy density of the battery is improved;

2. further, openings are formed at the two ends of the shell, thickened bodies are arranged at the openings, and the top cover and the bottom plate are welded to the openings, so that the thickness of the two ends of the shell is larger than that of the shell body, the welding strength of the top cover and the bottom plate and the openings is guaranteed, the weight of the battery shell is reduced, and the energy density of the battery is improved while raw materials are saved.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is an enlarged view of the structure at a in fig. 2;

FIG. 4 is a schematic diagram of a second embodiment of the present utility model;

FIG. 5 is a cross-sectional view of FIG. 4;

fig. 6 is an enlarged view of the structure at B in fig. 5;

FIG. 7 is an enlarged view of the structure at C in FIG. 5

Reference numerals: a shell 1, a cover body 2, a top cover 201, a bottom plate 202, a thickened body 3 and an opening 4.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Embodiment one:

as shown in fig. 1-3, a battery shell comprises a shell 1, wherein at least one opening 4 is arranged on the shell 1, a cover body 2 for covering the opening 4 is arranged at the opening 4, a thickening body 3 arranged around the opening 4 is formed on the shell 1, and the thickness of the thickening body 3 gradually increases along the direction of the corresponding opening 4; the thickening body 3 is formed on the outer surface of the housing 1.

Specifically, the casing 1 is of a rectangular aluminum structure, the opening 4 is positioned at the end part of the casing 1, the battery is placed into the casing 1 through the opening 4, the cover body 2 is of a rectangular aluminum plate, the cover body 2 is matched with the opening 4, and the opening 4 is sealed through the cover body 2; the thickening body 3 sets up on the outer wall of casing 1, and thickening body 3 adopts the aluminium material preparation, realizes thickening the shell wall of casing 1 opening 4 department through thickening body 3 to the structural strength of casing 1 opening 4 department has been increased.

The case 1 is a hollow structure having an opening 4 formed at the top thereof, and the top of the case 1 is provided with a top cover 201 covering the opening 4, specifically, a battery is placed in the case 1 through the opening 4, and then sealing of the opening 4 of the case 1 is achieved through the top cover 201.

Further, the size of the top cover 201 is consistent with the size of the opening 4, the top cover 201 is welded at the opening 4, when the top cover 201 is welded with the opening 4, the top cover 201 and the opening 4 are ensured to be completely sealed, the welding quality of the top cover 201 is ensured, and the situation that the opening 4 of the shell 1 is cracked in the production and transportation processes of the battery, so that the battery is damaged and leaked, is avoided.

The thickened body 3 top and casing 1 top parallel and level, further assurance when carrying out the welding with the opening 4 of casing 1 with top cap 201, top cap 201 can be in the same place with the welding of thickened body 3 to make top cap 201 and thickened body 3 and opening link together, thereby guaranteed the welding strength of top cap 201 and opening 4, further promoted the quality of battery case.

Embodiment two:

as shown in fig. 4 to 7, in the present embodiment, the housing 1 has a hollow structure in which openings 4 are formed at the top and bottom, two openings 4 are located at opposite ends of the housing 1, the housing 1 has an aluminum rectangular structure in which openings 4 are formed at both ends, and a battery can be placed in the housing 1 through the openings 4 at both ends of the housing 1.

The top of the shell 1 is provided with a top cover 201 covering the opening 4 at the top, the bottom of the shell 1 is provided with a bottom plate 202 covering the opening 4 at the bottom, further, the top cover 201 and the bottom plate 202 are all made of aluminum plates, the size of the top cover 201 is consistent with that of the opening 4 at the top, the size of the bottom plate 202 is consistent with that of the opening 4 at the bottom, and the sealing effect on the openings 4 at two ends of the shell 1 is realized through the top cover 201 and the bottom plate 202, so that a battery in the shell 1 cannot slide out from the shell 1, and meanwhile, the protection effect on the battery is realized.

The top and the bottom of casing 1 all are formed with the thickening body 3 that encircles corresponding opening 4 and set up, the thickness of thickening body 3 increases gradually along the opening 4 direction at corresponding casing 1 both ends respectively, realize thickening casing 1 both ends opening 4's shell wall through thickening body 3, thereby when making top cap 201 and bottom plate 202 be connected with opening 4, increase the structural strength between opening 4 and top cap 201 and the bottom plate 202 at casing 1 both ends, thereby ensure that battery case can not break between opening 4 and top cap 201 or bottom plate 202 in the in-process of production, transportation, thereby avoided causing the condition of damaging the weeping to the battery, guaranteed battery case's quality.

The top cover 201 is welded to the opening 4 at the top, the bottom plate 202 is welded to the opening 4 at the bottom, the connection between the top cover 201 and the bottom plate 202 is realized in a welded mode, and the connection strength between the opening 4 and the top cover 201 and the bottom plate 202 is ensured, so that the protection effect of the battery shell on the battery is realized.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more herein: the terms housing 1, cover 2, top 201, bottom 202, thickened body 3, opening 4, etc. do not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The battery shell is characterized by comprising a shell (1), wherein at least one opening (4) is formed in the shell (1), a cover body (2) for sealing the opening (4) is arranged at the opening (4), a thickening body (3) arranged around the opening (4) is formed in the shell (1), and the thickness of the thickening body (3) is gradually increased along the direction of the corresponding opening (4); the thickening body (3) is formed on the outer surface of the shell (1).

2. A battery housing according to claim 1, characterized in that the housing (1) is a hollow structure with the opening (4) formed in the top, and that the top of the housing (1) is provided with a top cover (201) covering the opening (4).

3. A battery housing according to claim 2, wherein the top cover (201) is dimensioned to correspond to the size of the opening (4).

4. A battery housing according to claim 3, characterized in that the top cover (201) is welded to the opening (4).

5. A battery housing according to claim 1, characterized in that the top of the thickening body (3) is flush with the top of the housing (1).

6. A battery housing according to claim 1, characterized in that the casing (1) is a hollow structure with the openings (4) formed in both the top and bottom, two of the openings (4) being located at opposite ends of the casing (1).

7. A battery housing according to claim 6, characterized in that the top of the housing (1) is provided with a top cover (201) covering the opening (4) at the top, and the bottom of the housing (1) is provided with a bottom plate (202) covering the opening (4) at the bottom.

8. A battery housing according to claim 7, wherein the top cover (201) is sized to correspond to the top opening (4) and the bottom plate (202) is sized to correspond to the bottom opening (4).

9. A battery housing according to claim 6, characterized in that the top and bottom of the housing (1) are each formed with a thickening body (3) arranged around the corresponding opening (4).

10. A battery housing according to claim 7, wherein the top cover (201) is welded to the top opening (4) and the bottom plate (202) is welded to the bottom opening (4).