CN219350450U

CN219350450U - Battery cell cover plate and battery pack

Info

Publication number: CN219350450U
Application number: CN202223603004.8U
Authority: CN
Inventors: 余金飞
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-07-14
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a battery cell cover plate and a battery pack. The battery cell cover plate comprises a cover plate body with a positive electrode hole and a positive electrode part arranged at the positive electrode hole; the positive electrode part is electrically connected with the cover plate body, the cover plate body comprises a light aluminum plate and a lower plastic part arranged below the light aluminum plate, and the positive electrode part can sequentially pass through the light aluminum plate and the lower plastic part through the positive electrode hole. According to the battery cell cover plate, the connection mode of the positive electrode part and the optical aluminum plate is changed, so that the positive electrode part can be prevented from being connected with the cover plate body by adopting a complex riveting structure, and the battery cell cover plate capable of reducing the weight of the battery cell cover plate and reducing the production cost of the battery cell cover plate is provided.

Description

Battery cell cover plate and battery pack

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery cell cover plate. In addition, the utility model also relates to a battery pack.

Background

The lithium ion battery is a novel rechargeable battery, and is widely applied to various electronic products today with advanced technology. At present, a plurality of companies use the positively charged cell housing to solve the problem of corrosion of the cell housing. And most of positively charged battery cell cover plate pole column positions at present adopt a relatively complex riveting structure, and the positive pole column of the battery cell cover plate adopts a complex riveting structure, so that the weight and the cost of the battery pack are increased.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery cell cover plate, which is simple in structure and low in cost by changing the mounting manner of the positive pole of the battery cell cover plate.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the battery cell cover plate comprises a cover plate body with a positive electrode hole and a positive electrode part arranged at the positive electrode hole, wherein the positive electrode part is made of aluminum, and the positive electrode part is electrically connected with the cover plate body;

the cover plate body comprises a light aluminum plate and a lower plastic part arranged below the light aluminum plate, wherein the positive electrode part can sequentially penetrate through the light aluminum plate and the lower plastic part through the positive electrode hole, and the positive electrode part is integrally formed by stamping or welded connection with the light aluminum plate.

Further, the thickness of the positive electrode portion is 3.5mm to 8mm.

Further, the thickness of the positive electrode portion is 8mm, and/or the thickness of the bottom of the positive electrode portion exceeding the bottom of the photo-aluminum plate is 2mm.

Compared with the prior art, the utility model has the following advantages:

according to the battery core cover plate, the positive electrode hole is formed in the cover plate body, the conventional positive electrode column is replaced by the positive electrode part, the positive electrode part can be connected with the positive electrode hole through laser welding or integral stamping forming, the positive electrode part is prevented from being connected with the cover plate body by using a complex structure, the structure is simple, and the weight and cost of the battery core cover plate can be reduced.

The positive electrode portion and the aluminum plate are made of the same material, and good conductivity can be maintained between the positive electrode portion and the aluminum plate.

Further, the thickness of the positive electrode portion is set to be the same as that of the conventional positive electrode post, and the positive electrode portion can be maintained to the same effect as that of the conventional positive electrode post to the maximum extent after the conventional positive electrode post is replaced with the positive electrode portion.

Another object of the present utility model is to provide a battery pack, which includes a housing having an opening, and the battery pack further includes the above battery cell cover, wherein the cover body of the battery cell cover is used for sealing the opening, and the housing is used for placing the battery cell.

Further, after the cover plate body of the battery cell cover plate is used for blocking the opening, the positive electrode part of the battery cell cover plate penetrates through the positive electrode hole and is electrically connected with the battery cell.

Compared with the prior art, the utility model has the following advantages:

according to the battery pack, the opening of the shell is plugged through the battery core cover plate, the battery core is plugged in the shell, and the positive electrode part is electrically connected with the battery core through the positive electrode hole, so that the weight and cost of the battery can be reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model, wherein the words of front and back, top and bottom, etc. are used to indicate relative position and are not intended to limit the utility model unduly. In the drawings:

fig. 1 is a schematic structural diagram of a battery cell cover plate according to a first embodiment of the utility model;

fig. 2 is a schematic diagram of a connection structure between a positive hole and a positive portion of a battery cell cover plate according to a first embodiment of the present utility model;

fig. 3 is a schematic structural view of a battery pack according to a second embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a positive electrode cover plate according to a third embodiment of the present utility model;

fig. 5 is a schematic structural view of a battery pack according to a third embodiment of the present utility model;

reference numerals illustrate:

1. a positive electrode hole; 2. a cover plate body; 3. a positive electrode section; 4. a polished aluminum plate; 5. a lower plastic part; 6. an opening; 7. a housing; 8. and a positive electrode cover plate.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", etc., are presented, they are merely for convenience of description of the present utility model and simplify the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model if terms such as "first", "second", etc., are presented, they are also merely for descriptive purposes, and are not construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection may be a fixed connection, a removable connection, or an integral connection may be a mechanical connection, or an electrical connection may be a direct connection, or an indirect connection via an intermediary, or a 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 in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The embodiment relates to a battery cell cover plate, and provides a battery cell cover plate with a simple structure and low cost, and an exemplary structure of the battery cell cover plate is shown in fig. 1 and 2.

In general, the battery cell cover plate comprises a cover plate body 2 with a positive electrode hole 1 and a positive electrode part 3 arranged at the positive electrode hole 1, wherein the positive electrode part 3 is electrically connected with the cover plate body 2.

The positive electrode 3 is directly connected with the positive electrode hole 1 of the cover plate body 2, so that the complex structural connection between the positive electrode 3 and the cover plate body 2 can be avoided, the weight of the battery cell cover plate is reduced, and the cost of the battery cell cover plate can be reduced.

Specifically, the cover plate body 2 includes a photo-aluminum plate 4, and a lower molding 5 disposed below the photo-aluminum plate 4, and the positive electrode portion 3 can sequentially pass through the photo-aluminum plate 4 and the lower molding 5 via the positive electrode hole 1.

The positive electrode portion 3 is made of the same aluminum material as the aluminum plate 4, so that the positive electrode portion 3 and the aluminum plate 4 can be formed by laser welding or integral press molding, and good conductivity can be maintained between the positive electrode portion 3 and the aluminum plate 4.

In this embodiment, the thickness of the positive electrode portion 3 is 3.5mm to 8mm. The thickness of the positive electrode portion 3 is close to that of the conventional positive electrode post, and after the positive electrode portion 3 is replaced by the conventional positive electrode post, the positive electrode portion 3 can be maintained to the same effect as the conventional positive electrode post to the maximum extent.

Wherein, when the thickness of the positive electrode portion 3 is 8mm, the thickness of the bottom of the positive electrode portion 3 exceeding the bottom of the photo-aluminum plate 4 is 2mm. In this way, the positive electrode 3 and the battery cell can be normally connected.

The installation principle of the battery cell cover plate of the embodiment is as follows:

the positive electrode part 3 made of aluminum is connected with the positive electrode hole 1 of the cover plate body 2, the connection mode can be laser welding or the positive electrode part 3 made of aluminum and the optical aluminum plate 4 of the cover plate body 2 are integrally formed by stamping, the method that the existing battery cell cover plate adopts a complex riveting structure to connect positive electrode posts can be changed, the complex riveting structure is avoided, the weight of the battery cell cover plate can be reduced, and the cost of the battery cell cover plate during manufacturing can be reduced.

Example two

As shown in fig. 3, the present embodiment relates to a battery pack, which includes a housing 7 having an opening 6, and further includes a battery cell cover according to the first embodiment, wherein the cover body 2 of the battery cell cover is used for sealing the opening 6, and the housing 7 is used for placing the battery cell.

In addition, after the cover plate body 2 of the battery cell cover plate is used for sealing the opening 6, the positive electrode part 3 of the battery cell cover plate passes through the positive electrode hole 1 and is electrically connected with the battery cell.

The installation principle of the battery pack of the present embodiment is as follows:

the two pole ears of the battery pack of the embodiment are positioned at the same end of the shell 7, the lower plastic part 5 faces the opening 6 of the shell 7, the opening 6 of the shell 7 is plugged by the optical aluminum plate 4, and after the opening 6 of the shell 7 is plugged by the optical aluminum plate 4 of the cover plate body 2, the positive pole part 3 of the battery cell cover plate passes through the positive pole hole 1 to be electrically connected with the battery cell, so that the battery pack can keep less weight and lower cost.

Example III

As shown in fig. 4 and 5, the present embodiment relates to a battery pack including a case 7 having openings 6 at both ends.

The battery pack further includes a positive electrode cover plate 8 and a negative electrode cover plate fixed to both ends of the case 7, respectively.

The two pole ears of the battery pack of the embodiment are respectively positioned at two ends of the shell 7, the design of the positive pole is canceled on the positive pole cover plate 8, and only the optical aluminum plate 4 and the lower plastic part 5 are reserved and are directly and electrically connected with the battery cell through the optical aluminum plate 4.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides a electricity core apron which characterized in that:

the cover plate comprises a cover plate body with a positive hole and a positive electrode part arranged at the positive hole, wherein the positive electrode part is made of aluminum and is electrically connected with the cover plate body;

the apron body includes light aluminum plate to and set up in the lower piece of moulding of light aluminum plate below, and anodal portion can pass light aluminum plate in proper order and mould the piece under via anodal hole, and anodal portion and light aluminum plate integrated into one piece stamping forming or welded connection.

2. The cell cover of claim 1, wherein:

the thickness of the positive electrode part is 3.5 mm-8 mm.

3. The cell cover of claim 2, wherein:

the thickness of the positive electrode part is 8mm; and/or the thickness of the bottom of the positive electrode part beyond the bottom of the photo-aluminum plate is 2mm.

4. A battery pack comprising a housing having an opening, characterized in that:

the battery pack further comprises a cell cover plate according to any one of claims 1 to 3,

the cover plate body of the battery cell cover plate is used for blocking the opening, and the shell is used for placing the battery cell.

5. The battery pack according to claim 4, wherein:

after the cover plate body of the battery cell cover plate is used for blocking the opening, the positive electrode part of the battery cell cover plate penetrates through the positive electrode hole and is electrically connected with the battery cell.