CN219591465U

CN219591465U - Battery cell

Info

Publication number: CN219591465U
Application number: CN202320713439.3U
Authority: CN
Inventors: 瞿博
Original assignee: Weilai Battery Technology Anhui Co ltd
Current assignee: Weilai Battery Technology Anhui Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-08-25
Anticipated expiration: 2033-03-31

Abstract

The utility model relates to a battery, which comprises a first cover plate, a second cover plate, a shell and a pole core, wherein openings are formed in two sides of the shell, the first cover plate and the second cover plate are respectively arranged on two sides of the shell and are connected with the shell to form a closed cavity, the pole core is arranged in the cavity, pole lugs of the pole core are respectively arranged at two end parts of the pole core and are electrically connected with pole posts respectively arranged on the first cover plate and the second cover plate, the first cover plate is provided with a first bending part, and the pole posts on the first cover plate are arranged on the surface of the first bending part and are perpendicular to the first bending part. The utility model can avoid the risk of short circuit and corrosion caused by the folding of the polar lugs and save the space occupied by the polar posts.

Description

Battery cell

Technical Field

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

Background

At present, square hard shell batteries are widely applied to the fields of electric automobiles and energy storage. As an efficient energy storage device, increasing capacity and energy density are major developments of lithium ion batteries, and in reality increasing battery capacity and energy density is mainly achieved by increasing space utilization inside the battery. In the existing square hard-shell battery, most of the battery cells adopt a mode of discharging lugs from two sides (positive lugs and negative lugs extend out from two sides of the battery cells respectively), then the lugs are connected with a cover plate through connecting sheets, and the problem of space waste can be solved by adopting a mode of folding the lugs due to long current transmission paths, but after the lugs are folded, the lugs are easy to squeeze a diaphragm to cause contact of the positive and negative plates, and finally short circuit is caused, or the folded lugs are in contact with the inner wall of a battery shell to cause corrosion.

Disclosure of Invention

The utility model aims to provide a battery, so as to avoid short circuit and corrosion risks caused by tab folding and save space occupied by a pole.

The aim of the utility model is achieved by adopting the following technical scheme. The battery comprises a first cover plate, a second cover plate, a shell and a pole core, wherein openings are formed in two sides of the shell, the first cover plate and the second cover plate are respectively arranged on two sides of the shell and are connected with the shell to form a closed cavity, the pole core is arranged in the cavity, pole lugs of the pole core are respectively arranged at two end parts of the pole core and are electrically connected with pole posts respectively arranged on the first cover plate and the second cover plate, the first cover plate is provided with a first bending part, and the pole posts on the first cover plate are arranged on the surface of the first bending part and are perpendicular to the first bending part.

In some embodiments, the second cover plate has a second bent portion, and the pole on the second cover plate is disposed on a surface of the second bent portion and perpendicular to the second bent portion.

In some embodiments, the pole on the first cover plate is disposed in a direction away from the pole core and perpendicular to the first fold.

In some embodiments, the post on the first cover plate is disposed on the surface of the first fold portion by welding.

In some embodiments, the tabs of the pole core are connected to the poles of the first cover plate and the second cover plate through the adapter plate.

In some embodiments, the first cover plate is structurally identical to the second cover plate.

In some embodiments, the first cover plate further includes a first vertical portion and a second vertical portion, the bottom of the first vertical portion is connected to the first end of the first bending portion, the second end of the first bending portion is connected to the top of the second vertical portion, and the first vertical portion and the second vertical portion are perpendicular to the first bending portion.

In some embodiments, the first vertical portion, the first bent portion, and the second vertical portion are integrally formed.

In some embodiments, the first cover plate and the second cover plate are integrated on both sides of the housing as part of the housing, respectively.

The beneficial effects of the utility model at least comprise:

according to the utility model, the first cover plate is provided with the first bending part, and the pole on the first cover plate is arranged on the surface of the first bending part and is perpendicular to the first bending part, so that the space occupied by the pole is saved, the pole lug of the pole core can naturally extend out of the pole core, the short circuit and corrosion risk caused by folding the pole lug are avoided, and meanwhile, the production process is simplified.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model given in conjunction with the accompanying drawings.

Drawings

Fig. 1 is an exploded view of a battery according to an embodiment of the present utility model;

fig. 2 is a schematic view of a battery assembly structure according to an embodiment of the present utility model;

fig. 3 is a schematic view illustrating an assembled structure of a battery according to another embodiment of the present utility model.

Detailed Description

In order to further describe the technical means of the present utility model, the following detailed description of a specific embodiment of a battery according to the present utility model is given with reference to the accompanying drawings and preferred embodiments. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the term "comprising" in the description of the utility model and the claims and in the description of the figures above and any variants thereof.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and may be a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, the battery according to the present utility model includes a first cover plate 1, a second cover plate 2, a housing 3, and a pole core 4, wherein openings are formed on two sides of the housing 3, the shapes of the openings on two sides of the housing 3 are adapted to those of the first cover plate 1 and the second cover plate 2, the first cover plate 1 and the second cover plate 2 are respectively disposed on two sides of the housing 3 and are connected with the housing 3 to form a closed cavity, and the pole core 4 is disposed inside the cavity. In one or more embodiments, the first cover plate 1 and the second cover plate 2 are respectively connected with the housing 3 by welding to form a closed cavity. In one or more embodiments, the pole piece 4 is configured as a cuboid. In one or more embodiments, the positive electrode tab 41 and the negative electrode tab 42 of the electrode core 4 are respectively disposed at two ends of the electrode core 4 in the length direction, and are electrically connected to the electrode posts 14 respectively disposed on the first cover plate 1 and the second cover plate 2. In one or more embodiments, the positive tab 41 and the negative tab 42 may be located relatively at the same height at both ends of the electrode core 4. In some other embodiments, the positive tab 41 and the negative tab 42 may also be located at different heights at the two ends of the pole piece 4.

In one or more embodiments, the first cover plate 1 has first bending parts 12 along the length direction of the pole core 4, the first bending parts 12 are configured as horizontal planes extending along the length direction of the pole core 4, the pole posts 14 on the first cover plate 1 are all arranged on the surface of the first bending parts 12, and the columnar bodies of the pole posts 14 are perpendicular to the first bending parts 12.

According to the utility model, the first cover plate 1 is provided with the first bending part 12, and the pole column on the first cover plate 1 is arranged on the surface of the first bending part 12 and is perpendicular to the first bending part 12, so that the space occupied by the pole column is saved, therefore, the positive pole lug of the pole core 4 can naturally extend out of the pole core 4, the short circuit and corrosion risk caused by folding the positive pole lug 41 are avoided, and the production process is simplified.

In one or more embodiments, the second cover plate 2 has a second bent portion 21, and the pole 14 on the second cover plate 2 is disposed on a surface of the second bent portion 21 and perpendicular to the second bent portion 21. According to the utility model, the second cover plate 2 is provided with the second bending part 21, and the pole 14 on the second cover plate 2 is arranged on the surface of the second bending part 21 and is perpendicular to the second bending part 21, so that the space occupied by the pole is saved, therefore, the pole lug 42 of the pole core 4 can be naturally extended out of the pole core 4, the short circuit and corrosion risk caused by folding the pole lug 42 are avoided, the production process is simplified, and the space occupied by the pole is saved.

The columnar body of the pole 14 on the first cover plate 1 is disposed in a direction away from the pole core and perpendicular to the first bending portion 12, and may be directed upward or downward perpendicular to the first bending portion 12, and as shown in fig. 3, the orientations of the pole 14 on the first cover plate 1 and the second cover plate 2 may be the same or different.

In one or more embodiments, the pole 14 on the first cap plate 1 may be disposed on the surface of the first bent portion 12 by welding.

In one or more embodiments, the first cover plate 1 and the second cover plate 2 are each configured in a "Z" shape, and the first cover plate 1 and the second cover plate 2 are identical in structure. Taking the structure of the first cover plate 1 as an example for illustration, the first cover plate 1 further includes a first vertical portion 11 and a second vertical portion 13, the bottom of the first vertical portion 11 is connected with the first end portion of the first bending portion 12, the second end portion of the first bending portion 12 is connected with the top of the second vertical portion 13, the first vertical portion 11 and the second vertical portion 13 are perpendicular to the length direction of the pole core 4, and the first vertical portion 11 and the second vertical portion 13 are perpendicular to the first bending portion 12.

In one or more embodiments, the first upright portion 11, the first folded portion 12, and the second upright portion 13 are integrally formed.

In one or more embodiments, the positive tab 41 and the negative tab 42 can be connected to the posts 14 of the first cover plate 1 and the second cover plate 2 through tabs.

In one or more embodiments, the first cover plate 1 and the second cover plate 2 may also be integrated on both sides of the housing 3 as part of the housing 3, respectively, while the posts 14 on the first cover plate 1 and the second cover plate 2 are integrated on the housing 3.

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

Claims

1. The utility model provides a battery, its characterized in that includes first apron, second apron, casing and utmost point core, the both sides of casing have the opening, first apron and the second apron set up respectively in the both sides of casing and with the casing is connected in order to form confined cavity, the utmost point core set up in the inside of cavity, just the utmost point ear of utmost point core set up respectively in two tip of utmost point core, and with first apron and utmost point post electricity that sets up respectively on the second apron is connected, first apron has first bending portion, utmost point post on the first apron set up in the surface of first bending portion and perpendicular to first bending portion.

2. The battery of claim 1, wherein the second cover plate has a second bent portion, and the post on the second cover plate is disposed on a surface of the second bent portion and perpendicular to the second bent portion.

3. The battery of claim 1, wherein the post on the first cover plate is disposed in a direction away from the pole core and perpendicular to the first fold.

4. The battery according to claim 1, wherein the post on the first cover plate is disposed on the surface of the first folded portion by welding.

5. The battery of claim 1, wherein the tabs of the pole pieces are connected to the poles of the first cover plate and the second cover plate by tabs.

6. The battery of claim 1, wherein the first cover plate is structurally identical to the second cover plate.

7. The battery of claim 1, wherein the first cover plate further comprises a first vertical portion and a second vertical portion, wherein a bottom of the first vertical portion is connected to a first end of the first folded portion, a second end of the first folded portion is connected to a top of the second vertical portion, and the first vertical portion and the second vertical portion are perpendicular to the first folded portion.

8. The battery of claim 7, wherein the first vertical portion, the first bent portion, and the second vertical portion are integrally formed.

9. The battery of claim 1, wherein the first cover plate and the second cover plate are integrated on both sides of the case as part of the case, respectively.