CN218849725U

CN218849725U - Top cover structure and power battery

Info

Publication number: CN218849725U
Application number: CN202320448621.0U
Authority: CN
Inventors: 吴俊�; 邓芳泽; 李一乐
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-04-11
Anticipated expiration: 2033-03-10

Abstract

The application provides a top cap structure and power battery. Wherein, this roof structure includes: the connecting block, the first negative pole, the second negative pole and the substrate; the connecting block is arranged on one side of the substrate; the connecting block comprises a connecting block body, a first connecting part and a second connecting part, and the first negative pole penetrates through the substrate and the connecting block body to be connected with the first connecting part; the second negative pole column penetrates through the substrate and the connecting block body to be connected with the second connecting part; the first negative pole column and the second negative pole column are integrally formed, the first connecting portion is made of the same material as the first negative pole column, and the second connecting portion is made of the same material as the second negative pole column. This application can share some respectively and overflow the demand through setting up two negative pole posts, every negative pole post, and then can improve this top cap structure's the ability of overflowing.

Description

Top cover structure and power battery

Technical Field

The application relates to the field of batteries, in particular to a top cover structure and a power battery.

Background

Currently, in order to shorten the power supplementing speed of an electric automobile, a power battery is generally required to have a fast charging capacity of 3C or even 4C. But at present, the battery cell with the quick charging capability is generally thin, so that the width of the top cover is smaller, the structure of the corresponding pole is correspondingly limited, and the traditional top cover structure cannot meet the requirement of the quick charging current capability.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the embodiment of the present application is to provide a top cover structure and a power battery, which can improve the overcurrent capacity of the top cover structure.

In a first aspect, an embodiment of the present application provides a roof structure, including: the connecting block, the first negative pole, the second negative pole and the substrate; the connecting block is arranged on one side of the substrate; the connecting block comprises a connecting block body, a first connecting part and a second connecting part, and the first negative pole penetrates through the substrate and the connecting block body to be connected with the first connecting part; the second negative pole column penetrates through the substrate and the connecting block body to be connected with the second connecting portion.

In the implementation process, because the battery cell with the quick charging capability is based on the overcurrent requirement of quick charging, the battery cell is relatively weak, the width of the top cover of the battery cell with the structure is small, the diameter of the pole is relatively small, and the overcurrent requirement is difficult to meet. By arranging the two negative pole posts, each negative pole post can share part of overcurrent requirements respectively, and the overcurrent capacity of the top cover structure can be improved.

In one embodiment, the first negative electrode post and the second negative electrode post are integrally formed, the first connection portion is made of the same material as the first negative electrode post, and the second connection portion is made of the same material as the second negative electrode post.

In the above-mentioned realization process, through setting up first negative pole post and second negative pole post as integrated into one piece, can solve because of friction stir welding technology to the negative pole post of minor diameter, its welding strength is low, the problem that the defective rate is high, improves the reliability and the security of this first negative pole post and second negative pole post.

In one embodiment, a first groove and a second groove are respectively arranged at two ends of the connecting block body; the first connecting part is embedded into the first groove, and the second connecting part is embedded into the second groove; the material of the first connecting portion and the material of the second connecting portion are different from the material of the connecting block body.

In one embodiment, the surfaces of the first connecting portion and the first groove, which are not parallel to each other, and the surfaces of the second connecting portion and the second groove, which are not parallel to each other, are inclined surfaces, and a gap is formed between the first connecting portion and the second connecting portion and the connecting block body through the inclined surfaces.

In the above implementation process, when the first connecting portion and the second connecting portion are respectively embedded into the connecting block body, a gap exists between the first connecting portion and the second connecting portion, so that the first connecting portion and the connecting block body can be increased, the bonding strength of the second connecting portion and the connecting block body is increased, and the connection reliability of the first negative pole column and the second negative pole column and the connecting block body is improved.

In one embodiment, the angle between the inclined surface of the first connecting portion and the connecting block body is 25 ° to 60 °; the angle between the inclined plane of the second connecting part and the connecting block body is 25-60 degrees.

In the above-mentioned realization process, angle between the inclined plane and the connecting block body through setting up first connecting portion and angle between the inclined plane and the connecting block body of second connecting portion all are 25 to 60, can make the angle between the inclined plane and the connecting block body of first connecting portion and the angle between the inclined plane and the connecting block body of first connecting portion keep in a better scope, can form the angle and then increase bonding strength in, guarantee that the connecting portion thickness after condensing again is enough, improve joint strength.

In one embodiment, the material of the first connection portion, the material of the first negative electrode pillar, the material of the second connection portion, and the material of the second negative electrode pillar are copper or a copper alloy, and the material of the connection block body is aluminum or an aluminum alloy.

In the above-mentioned realization process, the material through setting up first connecting portion, first negative pole post and second connecting portion, second negative pole post is copper or copper alloy, because copper or copper alloy have better electric conductivity, and resistance is less, can improve the electric conductivity of this top cap structure.

In one embodiment, the material of the first connection portion, the material of the first negative electrode post, the material of the second connection portion, and the material of the second negative electrode post are aluminum or an aluminum alloy, and the material of the connection block body is copper or a copper alloy.

In the above-mentioned realization process, the material through setting up first connecting portion, first negative pole post and second connecting portion, second negative pole post is aluminium or aluminum alloy, because aluminium or aluminum alloy's melting point is lower, can reduce the welding degree of difficulty, improves this top cap structure's production efficiency.

In one embodiment, the upper surface of the first connecting portion is flush with the upper surface of the connector block body, and the upper surface of the second connecting portion is flush with the upper surface of the connector block body.

In the above implementation process, the upper surfaces of the first connecting portions and the connecting block body, and the upper surfaces of the second connecting portions and the connecting block body are set to be flush with each other, so that the first connecting portions and the second connecting portions can be prevented from exceeding the connecting block body. And then can reduce the thickness of this connecting block, and when improving the roughness of connecting block, increase the combined strength of first connecting portion, second connecting portion and connecting block body.

In one embodiment, the first negative post comprises a first longitudinal extension and a first lateral extension, and the second negative post comprises a second longitudinal extension and a second lateral extension; the first longitudinal extension part and the first transverse extension part are integrally formed, the first transverse extension part is positioned on one side of the base plate, which is far away from the connecting block body, and the first longitudinal extension part penetrates through the base plate and the connecting block body to be connected with the first connecting part; the second longitudinal extension part and the second transverse extension part are integrally formed, the second transverse extension part is positioned on one side, away from the connecting block body, of the base plate, and the second longitudinal extension part penetrates through the base plate and the connecting block body to be connected with the second connecting part.

In the implementation process, the first negative pole is provided with a structure of a first transverse extension part and a first longitudinal extension part, and the second negative pole is provided with a structure of a second transverse extension part and a second longitudinal extension part. The first longitudinal extending part and the second longitudinal extending part are used for being connected with the connecting block, and the first transverse extending part and the second transverse extending part are used for being transversely fixed so as to integrally connect the base plate, the connecting block, the insulating part, the sealing part and the like together, and the integral sealing property and the insulating property of the top cover structure are improved.

In a second aspect, an embodiment of the present application further provides a power battery, including: the cap structure of the first aspect, or any one of the possible embodiments of the first aspect.

In the implementation process, the top cover structure of the power battery is set to the structure, so that the power battery can meet the overcurrent requirement of quick charging, and the reliability and safety of the power battery are improved while the overcurrent requirement of the power battery is improved.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is an exploded view of a top cover structure provided in an embodiment of the present application;

fig. 2 is a cross-sectional view of a battery top cap after a first negative electrode tab and a first connection portion and a second negative electrode tab and a second connection portion are connected according to an embodiment of the present application;

fig. 3 is an overall schematic view of a battery top cap after a first negative electrode post and a first connection portion and a second negative electrode post and a second connection portion are connected according to an embodiment of the present application;

fig. 4 is a schematic diagram of a connection block provided in an embodiment of the present application.

Description of the drawings: 110-connecting block, 111-connecting block body, 1111-third through hole, 1112-fourth through hole, 1121-first through hole, 11211-step part, 112-first connecting part, 113-second connecting part, 1131-second through hole, 120-first negative pole column, 130-second negative pole column, 140-substrate, 150-upper plastic, 160-lower plastic, 170-sealing element, 171-first sealing ring and 172-second sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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 or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the product of the application is usually called upon when using, and are only used for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and therefore, should not be construed as limiting the present application.

Throughout the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The battery top cover is used as an important part of a structural part of the power battery, and the battery top cover is sealed by isolating the internal environment and the external environment after being welded with the aluminum shell. In addition, connect interior outer circuit, conduct the inside electric current of battery to the outside through utmost point post, play the effect that switches on.

Long-term research shows that the overcurrent requirement of the battery cell can be met only by one pole and one pole riveting block of the traditional top cover, but the battery cell with 3C or 4C quick charging capability is generally thin, so that the width of the top cover is small, the structure of the pole is limited correspondingly, and the overcurrent requirement is difficult to meet.

Moreover, the conventional pole is generally divided into a cylindrical connection part and a bottom surface welding part, and for the conventional negative pole, the copper metal of the cylindrical connection part and the aluminum metal of the bottom surface welding part are generally connected together by friction stir welding, but the friction stir welding process has more control parameters and more uncontrollable factors, and particularly for the negative pole with a small diameter, the welding strength is low, and the reject ratio is high.

In view of this, the present application provides a top cover structure, which improves the terminal post overcurrent capability of a top cover with a small width by designing a double-cathode post. In addition, the problem of low strength of the pole connecting part and the bottom surface welding part of the small-diameter pole is further solved by designing the pole into an integrated molding mode. The integrally formed pole has high reliability and low cost.

It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.

Referring to fig. 1 and 2, the top cover structure includes: connection block 110, first negative pole post 120, second negative pole post 130, and substrate 140.

Wherein, the connection block 110 is disposed at one side of the substrate 140; the connection block 110 includes a connection block body 111, a first connection part 112, and a second connection part 113, and the first negative electrode tab 120 is connected to the first connection part 112 through the substrate 140 and the connection block body 111; the second negative electrode tab 130 is connected to the second connection part 113 through the substrate 140 and the connection block body 111.

The first connection portion 112 is provided with a first through hole 1121, the second connection portion 113 is provided with a second through hole 1131, and the connection block body 111 is further provided with a third through hole 1111 and a fourth through hole 1112. The first negative pole 120 passes through the first through hole 1121 and the third through hole 1111, and the second negative pole 130 passes through the second through hole 1131 and the fourth through hole 1112. Or, the first negative pole 120 passes through the first through hole 1121 and the fourth through hole 1112, and the second negative pole 130 passes through the second through hole 1131 and the third through hole 1111. The arrangement positions of the third through hole 1111 and the fourth through hole 1112 can be adjusted according to actual situations, and the application is not particularly limited.

As shown in fig. 4, stepped portions 11211 are provided inside the third through hole 1111 and the fourth through hole 1112. That is, each of the third through hole 1111 and the fourth through hole 1112 includes a plurality of through holes having different diameters. The diameter of the first through hole 1121 may be the same as one or more of the through holes in the third through hole 1111 and the fourth through hole 1112, or may be different from the through holes in the third through hole 1111 and the fourth through hole 1112, and the relationship between the first through hole 1121 and the through holes in the third through hole 1111 and the fourth through hole 1112 may be adjusted according to actual situations, which is not specifically limited in this application. The diameter of the second through hole 1131 may be the same as one or more of the through holes in the third through hole 1111 and the fourth through hole 1112, or may be different from the through holes in the third through hole 1111 and the fourth through hole 1112, and the relationship between the second through hole 1131 and the through holes in the third through hole 1111 and the fourth through hole 1112 may be adjusted according to actual situations, which is not specifically limited in this application.

Correspondingly, a plurality of cylinders are arranged on the first negative pole 120, and the plurality of cylinders are fitted with a plurality of through holes with different diameters in the third through hole 1111 or the fourth through hole 1112, so as to be riveted with the connection block body 111 through the plurality of cylinders. The second negative pole 130 may also be provided with a plurality of cylinders, and the plurality of cylinders are engaged with the plurality of through holes with different diameters in the third through hole 1111 or the fourth through hole 1112, so as to be riveted with the connection block body 111 through the plurality of cylinders.

The substrate 140 is a metal substrate 140, and the material of the substrate 140 may be aluminum, copper, aluminum alloy, copper alloy, or the like. The specific material of the substrate 140 can be selected according to practical situations, and the application is not particularly limited.

It is understood that the first negative electrode tab 120 may be integrally formed of the same material, and the first negative electrode tab 120 may also be formed by welding two different materials. Similarly, the second negative electrode tab 130 may be integrally formed of the same material, and the second negative electrode tab 130 may also be formed by welding two different materials. Alternatively, the materials, structures, and the like of the first negative electrode tab 120 and the second negative electrode tab 130 may be completely the same, may be partially the same, or may be different.

In some embodiments, the first negative electrode tab 120 and the first connection portion 112 may be connected by welding, integrated arrangement, etc., and the second negative electrode tab 130 and the second connection portion 113 may be connected by welding, integrated arrangement, etc. The connection manner of the first negative electrode tab 120 and the first connection portion 112 and the connection manner of the second negative electrode tab 130 and the second connection portion 113 may be adjusted according to actual situations, and the application is not particularly limited.

In the implementation process, because the battery cell with the quick charge capability is based on the overcurrent demand of quick charge, the battery cell is relatively weak, the width of the top cover of the battery cell with the structure is also small, the diameter of the pole is relatively small, and the overcurrent demand is difficult to meet. By arranging the two negative pole posts, each negative pole post can share part of overcurrent requirements respectively, and the overcurrent capacity of the top cover structure can be improved.

In one possible implementation manner, the first negative electrode tab 120 and the second negative electrode tab 130 are integrally formed, the material of the first connection portion 112 is the same as that of the first negative electrode tab 120, and the material of the second connection portion 113 is the same as that of the second negative electrode tab 130.

Here, the first negative electrode tab 120 may be one of pure copper, pure aluminum, a copper alloy, an aluminum alloy, and the like, and the second negative electrode tab 130 may be one of pure copper, pure aluminum, a copper alloy, an aluminum alloy, and the like. The material of the first negative pole 120 and the second negative pole 130 may be the same or different, and the material selection of the first negative pole 120 and the second negative pole 130 may be adjusted according to the actual situation, which is not specifically limited in this application.

Correspondingly, the material of the first connecting portion 112 may also be one of pure copper, pure aluminum, copper alloy, aluminum alloy and other conductive metals, and the material of the second connecting portion 113 may also be one of pure copper, pure aluminum, copper alloy, aluminum alloy and other conductive metals.

It is understood that each of the first and second

negative posts

120 and 130 described above may include a connection part and a bottom surface, wherein the connection part and the bottom surface are integrally formed.

In the implementation process, the first negative pole post 120 and the second negative pole post 130 are integrally formed, so that the problems of low welding strength and high reject ratio of the small-diameter negative pole post due to the friction stir welding process can be solved, and the reliability and safety of the first negative pole post 120 and the second negative pole post 130 are improved.

In a possible implementation manner, a first groove and a second groove are respectively arranged at two ends of the connecting block body 111; the first connecting part 112 is embedded in the first groove, and the second connecting part 113 is embedded in the second groove; the material of the first connecting portion 112 and the material of the second connecting portion 113 are different from the material of the connecting block body 111.

Alternatively, the inner diameter of the first groove and the outer diameter of the first connecting portion 112 may be the same or different. The inner diameter of the second groove and the outer diameter of the second connecting portion 113 may be the same or different. The arrangement of the first groove and the first connection portion 112, and the arrangement of the second groove and the second connection portion 113 may be adjusted according to actual situations, and the present application is not limited specifically.

In some embodiments, the first connection portion 112 and the second connection portion 113 are made of aluminum, and the connection portion body is made of copper. Alternatively, the first connecting portion 112 and the second connecting portion 113 are made of aluminum alloy, and the connecting portion body is made of copper alloy. The first connection portion 112 and the second connection portion 113 are made of aluminum, and the connection portion body is made of copper alloy. Alternatively, the first connecting portion 112 and the second connecting portion 113 are made of aluminum alloy, and the connecting portion body is made of copper.

In other embodiments, the first connection portion 112 and the second connection portion 113 are made of copper, and the connection portion body is made of aluminum. Alternatively, the first connecting portion 112 and the second connecting portion 113 are made of copper alloy, and the connecting portion body is made of aluminum alloy. Alternatively, the first connection portion 112 and the second connection portion 113 are made of copper alloy, and the connection portion body is made of aluminum. Alternatively, the first connecting portion 112 and the second connecting portion 113 are made of copper, and the connecting portion body is made of aluminum alloy.

It is understood that the joint block body 111 is combined with the first and

second connection portions

112 and 113, respectively, by a hot rolling method, an explosion cladding method, an explosion rolling method, or the like.

In one possible implementation manner, the surface of the first connecting portion 112 that is not parallel to the bottom surface of the first groove and the surface of the second connecting portion 113 that is not parallel to the bottom surface of the second groove are both inclined surfaces, and the first connecting portion 112 and the second connecting portion 113 have a gap with the connector block body 111 through the inclined surfaces.

The first connection portion 112 and the second connection portion 113 may be formed in a shape of a truncated pyramid, a circular truncated cone, or the like. The first groove and the second groove can be in the shape of a cube, a cuboid, a cylinder and the like. That is, the first connecting portion 112 has a gap with the connector block body 111 when fitted into the first groove. The second connecting portion 113 has a gap with the connector block body 111 when fitted into the second groove.

In the implementation process, when the first connecting portion 112 and the second connecting portion 113 are respectively embedded into the connection block body 111, a gap exists between the first connecting portion 112 and the second connecting portion 113, so that the bonding strength of the first connecting portion 112 and the connection block body 111, and the bonding strength of the second connecting portion 113 and the connection block body 111 can be increased, and the connection reliability of the first negative pole 120 and the second negative pole 130 with the connection block body is improved.

In one possible implementation, the angle between the inclined surface of the first connection portion 112 and the connection block body 111 is 25 ° to 60 °; an angle between the inclined surface of the second connection portion 113 and the connector block body 111 is 25 ° to 60 °.

In the implementation process, the angle between the inclined plane of the first connecting part 112 and the connecting block body 111 and the angle between the inclined plane of the second connecting part 113 and the connecting block body 111 are 25-60 degrees, so that the angle between the inclined plane of the first connecting part 112 and the connecting block body 111 and the angle between the inclined plane of the first connecting part 112 and the connecting block body 111 are kept in a better range, the thickness of the connecting part after recondensation can be ensured to be enough while forming an angle and further increasing the bonding strength, and the connecting strength is improved.

In one possible implementation manner, the material of the first connection portion 112, the material of the first negative electrode pillar 120, the material of the second connection portion 113, and the material of the second negative electrode pillar 130 are copper or copper alloy, and the material of the connection block body 111 is aluminum or aluminum alloy.

In the implementation process, the first connection portion 112, the first negative pole 120, the second connection portion 113, and the second negative pole 130 are made of copper or copper alloy, so that the copper or copper alloy has good conductivity and low resistance, and the conductivity of the top cover structure can be improved.

In one possible implementation manner, the material of the first connection portion 112, the material of the first negative electrode pillar 120, the material of the second connection portion 113, and the material of the second negative electrode pillar 130 are aluminum or an aluminum alloy, and the material of the connection block body 111 is copper or a copper alloy.

In the above implementation process, the first connection portion 112, the first negative pole post 120, the second connection portion 113 and the second negative pole post 130 are made of aluminum or aluminum alloy, so that the welding difficulty can be reduced and the production efficiency of the top cover structure can be improved due to the fact that the melting point of the aluminum or the aluminum alloy is low.

In one possible implementation, the upper surface of the first connecting portion 112 is flush with the upper surface of the connector block body 111, and the upper surface of the second connecting portion 113 is flush with the upper surface of the connector block body 111.

In the above implementation, by setting the upper surfaces of the first connecting portions 112 and the joint block body 111, and the upper surfaces of the second connecting portions 113 and the joint block body 111 to be flush, the first connecting portions 112 and the second connecting portions 113 can be prevented from partially exceeding the joint block body 111. Therefore, the thickness of the connecting block 110 can be reduced, and the composite strength of the first connecting portion 112, the second connecting portion 113 and the connecting block body 111 can be increased while the flatness of the connecting block 110 is improved.

In one possible implementation, the first negative pole 120 includes a first longitudinal extension and a first lateral extension, and the second negative pole 130 includes a second longitudinal extension and a second lateral extension; a first longitudinal extension part and a first transverse extension part are integrally formed, the first transverse extension part is positioned on one side of the base plate 140 far away from the connecting block body 111, and the first longitudinal extension part penetrates through the base plate 140 and the connecting block body 111 to be connected with the first connecting part 112; a second longitudinally extending portion, which is located on the side of the base plate 140 away from the joint block body 111, and a second laterally extending portion, which passes through the base plate 140 and the joint block body 111 to be connected to the second connecting portion 113, are integrally formed.

Wherein the diameter of the first lateral extension is greater than the diameter of the first longitudinal extension and the diameter of the second lateral extension is greater than the diameter of the second longitudinal extension.

Alternatively, the first longitudinal extension is riveted to the first connecting portion 112 through the base plate 140 and the connecting block body 111 and then welded. The second longitudinally extending portion is also riveted to the second connecting portion 113 through the base plate 140 and the connector block body 111 and then welded. Here, the connection manner of the first longitudinally extending portion and the first connecting portion 112, and the connection manner of the second longitudinally extending portion and the second connecting portion 113 are shown as an example, and the connection manner of the first longitudinally extending portion and the first connecting portion 112, and the connection manner of the second longitudinally extending portion and the second connecting portion 113 may be adjusted according to practical situations, and the application is not particularly limited.

It will be appreciated that the cap structure also includes an insulator and seal 170, as shown in fig. 3.

In some embodiments, the insulator may include an upper plastic 150 and a lower plastic 160. The seal 170 may be a gasket.

Here, the upper plastic 150 is disposed between the base plate 140 and the connecting block 110, and the lower plastic 160 is disposed between the base plate 140 and the first and second laterally extending portions.

The above-mentioned sealing rings may include a first sealing ring 171 and a second sealing ring 172. The first seal 171 is disposed over the first longitudinally extending portion to isolate the first longitudinally extending portion from the base 140 and the lower plastic 160. The second seal ring 172 is disposed over the second longitudinally extending portion to isolate the second longitudinally extending portion from the base plate 140 and the lower plastic 160.

In the implementation process, the first negative pole 120 is configured as a structure with a first transverse extension and a first longitudinal extension, and the second negative pole 130 is configured as a structure with a second transverse extension and a second longitudinal extension. The first longitudinal extension part and the second longitudinal extension part are used for welding with the connecting block 110, and the first transverse extension part and the second transverse extension part are used for transverse fixing, so that the base plate 140, the connecting block 110, the insulating member, the sealing member 170 and the like are integrally connected together, and the sealing property and the insulating property of the whole top cover structure are improved.

In a possible implementation manner, the present application further provides a power battery, including: the top cover structure.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, 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 application shall be included in the protection scope of the present application. 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.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A roof structure, comprising: the connecting block, the first negative pole, the second negative pole and the substrate;

the connecting block is arranged on one side of the substrate;

the connecting block comprises a connecting block body, a first connecting part and a second connecting part, and the first negative pole penetrates through the substrate and the connecting block body to be connected with the first connecting part;

the second negative pole column penetrates through the substrate and the connecting block body to be connected with the second connecting portion.

2. The top cover structure according to claim 1, wherein the first negative electrode post and the second negative electrode post are integrally formed, the first connection portion is made of the same material as the first negative electrode post, and the second connection portion is made of the same material as the second negative electrode post.

3. The top cover structure of claim 1, wherein the connecting block body is provided at both ends thereof with a first groove and a second groove, respectively;

the first connecting part is embedded into the first groove, and the second connecting part is embedded into the second groove;

the material of the first connecting portion and the material of the second connecting portion are different from the material of the connecting block body.

4. Roof construction in accordance with claim 3,

the surface of the first connecting part, which is not parallel to the bottom surface of the first groove, and the surface of the second connecting part, which is not parallel to the bottom surface of the second groove, are inclined surfaces, and a gap exists between the first connecting part and the second connecting part and the connecting block body through the inclined surfaces.

5. Roof construction in accordance with claim 4,

the angle between the inclined plane of the first connecting part and the connecting block body is 25-60 degrees;

the angle between the inclined plane of the second connecting part and the connecting block body is 25-60 degrees.

6. The top cover structure of claim 3, wherein the first connecting portion, the first negative electrode pillar, the second connecting portion and the second negative electrode pillar are made of copper or copper alloy, and the connecting block body is made of aluminum or aluminum alloy.

7. The top cover structure according to claim 3, wherein the first connection portion, the first negative electrode column, the second connection portion and the second negative electrode column are made of aluminum or an aluminum alloy, and the connection block body is made of copper or a copper alloy.

8. The cap structure of claim 2, wherein the upper surface of the first connecting portion is flush with the upper surface of the connector block body, and the upper surface of the second connecting portion is flush with the upper surface of the connector block body.

9. The cap structure of claim 1, wherein the first negative post comprises a first longitudinal extension and a first lateral extension, and the second negative post comprises a second longitudinal extension and a second lateral extension;

the first longitudinal extension part and the first transverse extension part are integrally formed, the first transverse extension part is positioned on one side, away from the connecting block body, of the base plate, and the first longitudinal extension part penetrates through the base plate and the connecting block body to be connected with the first connecting part;

the second longitudinal extension part and the second transverse extension part are integrally formed, the second transverse extension part is positioned on one side, away from the connecting block body, of the base plate, and the second longitudinal extension part penetrates through the base plate and the connecting block body to be connected with the second connecting part.

10. A power cell, comprising: the roof structure of any of claims 1-9.