CN218896714U

CN218896714U - Battery top cover, battery unit and battery thereof

Info

Publication number: CN218896714U
Application number: CN202223148398.2U
Authority: CN
Inventors: 夏天军; 刘静; 高飞; 张放南
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-21
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a battery top cover, a battery monomer and a battery thereof, wherein the battery top cover comprises: the cover plate is provided with an assembly end, an installation boss which is bent towards one side of the assembly end and protrudes out of the assembly end is formed on the cover plate, and the installation boss is arranged close to the edge of the cover plate. The thickness of the battery top cover is reduced, so that the space utilization rate inside the battery core is improved, and the battery capacity and the energy density are improved.

Description

Battery top cover, battery unit and battery thereof

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery top cover, a battery monomer and a battery thereof.

Background

With the development of society and the increasing demands of people, reserves of traditional energy sources are at risk. Novel energy sources, especially the automobile industry, are greatly developed in China. Nowadays, more and more automobile enterprises begin to develop and manufacture electric automobiles, and as a core component and an energy source of the electric automobiles, a power battery is an important point of research. The storage capacity of the power battery determines the endurance mileage of the automobile. The storage unit of the power battery is the electric core. The effective utilization rate of the internal space of the cell structure is positively related to the thickness of the cover plate and the shell under the condition that the external dimension is unchanged. The thickness of the cover plate and the shell is reduced, the weight of the structure is reduced, and the energy density is improved while the capacity of the battery cell is increased.

In order to meet the matching requirement of the shell and the cover plate and the laser welding requirement of the shell and the cover plate, the thickness of the cover plate is required to be larger than 1.2mm (generally 1.5-3.0 mm), and the thicker cover plate leads to the reduction of the space for containing active substances in the battery cell, heavier weight and lower capacity and energy density of the battery cell.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an objective of the present utility model is to provide a battery top cover, which solves the problems of small internal space of the battery cell, and reduced capacity and energy density of the battery cell caused by too thick cover plate in the prior art.

The utility model also aims to provide a battery cell for applying the battery top cover.

The utility model also aims to provide a battery for applying the battery cell.

According to an embodiment of the utility model, a battery top cover includes: the cover plate is provided with an assembly end, an installation boss which is bent towards one side of the assembly end and protrudes out of the assembly end is formed on the cover plate, and the installation boss is arranged close to the edge of the cover plate.

According to the battery top cover provided by the embodiment of the utility model, the mounting boss which is bent towards one side of the mounting end and protrudes out of the mounting end is arranged at the position close to the edge of the cover plate, so that the overall thickness of the cover plate is reduced, the space in the battery cell is increased, and meanwhile, the capacity and the energy density of the battery cell are improved.

In some embodiments, the mounting boss is annular disposed about a circumferential edge of the cover plate.

In some embodiments, the cover plate has a top end disposed opposite to the assembly end, a distance between an end surface of the mounting boss away from the top end and the top end is H1, and a thickness of the cover plate is T1, wherein a ratio of H1 to T1 is 2-4.

In some embodiments, the curved portion of the mounting boss is formed with a groove having a groove width L1, wherein a ratio of L1 to H1 is 1.5 to 3.

In some embodiments, a pressing portion is formed between an edge surface of the cover plate and the mounting boss.

In some embodiments, the cover plate is made of metal.

According to an embodiment of the present utility model, a battery cell includes: a battery housing having an opening; the battery top cover is characterized in that the assembling end is abutted against the battery shell, and the mounting boss is arranged in the opening and abutted against the inner wall of the battery shell. Thereby, the capacity and energy density of the battery cell are improved.

In some embodiments, the thickness of the cover plate is T1, the wall thickness of the battery case is T2, and the ratio of T1 to T2 is 1 to 5.

In some embodiments, a pressing part is formed between the edge surface of the cover plate and the mounting boss, the pressing part has a width direction perpendicular to the edge surface, a dimension of the pressing part in the width direction is L2, and a wall thickness of the battery case is T2, wherein T1 and T2 are equal.

The battery according to the embodiment of the utility model comprises the battery cell. Thereby, the capacity and energy density of the battery are improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of the structure of a battery top cover in an embodiment of the present utility model;

FIG. 2 is a top view of FIG. 1 of the present utility model;

FIG. 3 isbase:Sub>A cross-sectional view taken along the direction A-A of FIG. 2 in accordance with the present utility model;

FIG. 4 is an enlarged view of section I of FIG. 3 in accordance with the present utility model;

FIG. 5 is a cross-sectional view of the present utility model taken along the direction B-B of FIG. 2;

fig. 6 is a schematic structural view of a battery cell according to an embodiment of the present utility model;

fig. 7 is an enlarged view of section II of fig. 6 in accordance with the present utility model.

Reference numerals:

100. a battery top cover;

10. a cover plate; 101. an assembly end; 102. a mounting boss; 1021. a groove; 103. an edge surface; 104. a pressing part;

1000. a battery cell;

200. and a battery case.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, 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 will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 7, a battery top cover 100 according to an embodiment of the present utility model is described below.

As shown in fig. 1 to 3, the battery top cover 100 according to the embodiment of the present utility model includes a cover plate 10.

The cover plate 10 has a fitting end 101, and the cover plate 10 is formed with a mounting boss 102 bent toward the fitting end 101 side and protruding from the fitting end 101, the mounting boss 102 being disposed near the edge of the cover plate 10.

It will be appreciated that in the prior art, to meet the requirements of assembly with the housing, the thickness of the cover is typically thicker, which reduces the space within the cell for the active material, resulting in a reduction in the capacity and energy density of the cell. In order to solve the above problem, the present application bends near the edge of the cover plate 10 to form a mounting boss 102 with a certain height, where the height of the mounting boss 102 is equal to the thickness of the cover plate 10 in the prior art, so that the thickness of the cover plate 10 itself in the present application is obviously reduced, the mounting end 101 may refer to the end of the cover plate 10 assembled with the battery case 200, and the mounting boss 102 can meet the requirement of the battery case 200, so that the space in the battery cell is increased, and the capacity and energy density of the battery cell are also improved.

According to the battery top cover 100 of the embodiment of the present utility model, by providing the mounting boss 102 bent toward the mounting end 101 side and protruding the mounting end 101 at the position close to the edge of the cover plate 10, the overall thickness of the cover plate 10 is reduced, the space within the battery cell is increased, and the capacity and energy density of the battery cell are improved.

In some embodiments, referring to fig. 3-4, the mounting boss 102 is annular disposed about the circumferential edge of the cover plate 10. It can be understood that the mounting boss 102 is a continuous ring structure, thereby ensuring high rigidity and high mounting reliability of the cover plate 10 after being connected to the battery case 200.

In some embodiments, referring to fig. 4, the cover plate 10 has a top end disposed opposite to the mounting end 101, a distance H1 between an end surface of the mounting boss 102 remote from the top end and the top end, and a thickness T1 of the cover plate 10, wherein a ratio of H1 to T1 is 2 to 4. It will be appreciated that the ratio of H1 to T1 is set to 2 to 4 in order to ensure that the cover plate 10 and the housing are better coupled to each other. The ratio of H1 to T1 may be any value from 2 to 4, and may be, for example, 2, 2.5, 3, 3.5, or 4.

In some embodiments, referring to fig. 4, the curved portion of the mounting boss 102 is formed with a groove 1021, and the groove width of the groove 1021 is L1, wherein the ratio of L1 to H1 is 1.5 to 3. It is understood that the groove width is the width of the groove 1021 in the left-right direction, and in order to secure manufacturability of the cover plate 10 bent into the groove 1021, the ratio of L1 to H1 is set to 1.5 to 3. The ratio of L1 to H1 may be any value from 1.5 to 3, and may be, for example, 1.5, 1.8, 2.0, 2.5, or 3.

In some embodiments, referring to fig. 3-5, a pinch 104 is formed between the edge surface 103 of the cover plate 10 and the mounting boss 102. That is, the pressing part 104 is a flat surface of the rim portion of the cap plate 10, and the width direction of the pressing part 104 is parallel to the thickness direction of the battery case 200. When the cap plate 10 and the battery case 200 are coupled, the pressing part 104 may be closely coupled to the upper port of the battery case 200, so that the cap plate 10 and the battery case 200 are firmly coupled. Specifically, the pressing part 104 may be welded to the battery case 200 by laser.

In some embodiments, the cover plate 10 is made of metal. Preferably, the metal may be aluminum or stainless steel. By using aluminum or stainless steel as the material of the cap plate 10, connection with the battery case 200 is facilitated and the material is easily available.

The battery cell 1000 according to an embodiment of the present utility model includes: battery case 200 and battery top cover 100 described above.

Referring to fig. 6, the battery case 200 has an opening; wherein the mounting end 101 abuts against the battery case 200, and the mounting boss 102 is provided in the opening and abuts against the inner wall of the battery case 200. Thereby, the capacity and energy density of the battery cell 1000 are improved.

It can be understood that one end of the battery top cover 100 having the mounting boss 102 is disposed in the opening of the battery case 200, the side surface of the mounting boss 102 is stopped against the inner wall of the battery case 200, and the space in the battery cell is increased by reducing the thickness of the battery top cover 100 by providing the mounting boss 102.

According to the battery cell 1000 of the embodiment of the present utility model, the capacity and energy density of the battery cell 1000 are improved by assembling the battery top cover 100 having the mounting boss 102 with the battery case 200. It should be noted that the features and advantages described above with respect to the battery top cover 100 are equally applicable to the battery cell 1000, and are not repeated here.

In some embodiments, referring to fig. 7, the thickness of the cover plate 10 is T1, and the wall thickness of the battery case 200 is T2, wherein the ratio of T1 to T2 is 1 to 5. It is understood that the ratio of T1 to T2 is set to 1 to 5 in order to secure the connection quality between the battery case 200 and the cap plate 10. The ratio of T1 to T2 may be any value from 1 to 5, for example, 1, 2, 3, 4, or 5.

In some embodiments, referring to fig. 1 and 7, a pressing part 104 is formed between the edge surface 103 of the cap plate 10 and the mounting boss 102, the pressing part 104 has a width direction perpendicular to the edge surface 103, the pressing part 104 has a dimension L2 in the width direction, and the battery case 200 has a wall thickness T2, wherein T1 and T2 are equal. It will be understood that by setting the width L2 of the pressing part 104 and the wall thickness T2 of the battery case 200 to be equal, the pressing part 104 has a thickness L2 to make the combination with the battery case 200 more stable, and the ends of the two remain flush in the up-down direction, so that the overall structure is attractive. The "dimension in the width direction of the pressing portion 104" is specifically analyzed according to circumstances, and as shown in fig. 1, the width direction of the pressing portion 104 may be the left-right direction in fig. 1 for the pressing portion 104 on the left and right sides, and the width direction of the pressing portion 104 may be the front-rear direction in fig. 1 for the pressing portion 104 on the front and rear sides.

The battery according to the embodiment of the present utility model includes at least one of the above-described battery cells 1000. Thereby, the capacity and energy density of the battery are improved. The specific type of the battery is not particularly limited, and may be a battery pack or a battery pack. Those skilled in the art will recognize that the battery pack is a module formed by at least one battery cell 1000, and the battery pack is a module formed by a plurality of battery packs, which will not be described herein. Meanwhile, the features and advantages described above with respect to the battery top cover 100 and the battery cell 1000 are equally applicable to the battery, and are not repeated here.

One embodiment of the battery top cover 100 of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1 to 7, a battery top cover 100 includes a cover plate 10.

The cover plate 10 has a fitting end 101, and the cover plate 10 is formed with a mounting boss 102 bent toward the fitting end 101 side and protruding from the fitting end 101, the mounting boss 102 being disposed near the edge of the cover plate 10. The mounting boss 102 is annular disposed about the peripheral edge of the cover plate 10.

The cover plate 10 has a tip end disposed opposite to the fitting end 101, a distance between an end face of the mounting boss 102 remote from the tip end and the tip end is H1, and a thickness of the cover plate 10 is T1, wherein a ratio of H1 and T1 is 2.

The curved portion of the mounting boss 102 is formed with a groove 1021, and the groove width of the groove 1021 is L1, where the ratio of L1 and H1 is 2. A pressing portion 104 is formed between the edge surface 103 of the cover plate 10 and the mounting boss 102, and the cover plate 10 is made of stainless steel.

The battery cell 1000 according to the embodiment of the present utility model includes the battery case 200 and the battery top cap 100 described above. The battery case 200 has an opening; wherein the mounting end 101 abuts against the battery case 200, and the mounting boss 102 is provided in the opening and abuts against the inner wall of the battery case 200.

The thickness of the cover plate 10 is T1, and the wall thickness of the battery case 200 is T2, wherein the ratio of T1 to T2 is 2. A pressing portion 104 is formed between the edge surface 103 of the cover plate 10 and the mounting boss 102, the pressing portion 104 having a width direction perpendicular to the edge surface 103, the pressing portion 104 having a dimension L2 in the width direction, and the battery case 200 having a wall thickness T2, wherein T1 and T2 are equal. The thickness of the cover plate 10 is T1, and the wall thickness of the battery case 200 is T2, wherein the ratio of T1 to T2 is 2.

A pressing portion 104 is formed between the edge surface 103 of the cover plate 10 and the mounting boss 102, the pressing portion 104 having a width direction perpendicular to the edge surface 103, the pressing portion 104 having a dimension L2 in the width direction, and the battery case 200 having a wall thickness T2, wherein T1 and T2 are equal.

The battery according to the embodiment of the present utility model includes one of the above-described battery cells 1000.

In the description of the present specification, reference to the terms "some embodiments," "optionally," "further," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery top cover, comprising: the cover plate (10), the cover plate (10) has assembly end (101), be formed with on the cover plate (10) towards assembly end (101) one side crooked and protruding installation boss (102) of assembly end (101), installation boss (102) are close to the edge setting of cover plate (10).

2. The battery top cover according to claim 1, wherein the mounting boss (102) is annular disposed around a circumferential edge of the cover plate (10).

3. The battery top cover according to claim 1, characterized in that the cover plate (10) has a top end disposed opposite to the fitting end (101), a distance between an end surface of the mounting boss (102) remote from the top end and the top end is H1, and a thickness of the cover plate (10) is T1, wherein a ratio of H1 and T1 is 2 to 4.

4. A battery top cover according to claim 3, wherein the curved portion of the mounting boss (102) is formed with a groove (1021), the groove width of the groove (1021) being L1, wherein the ratio of L1 to H1 is 1.5 to 3.

5. The battery top cover according to claim 1, wherein a pressing portion (104) is formed between an edge surface (103) of the cover plate (10) and the mounting boss (102).

6. The battery top cover according to claim 1, characterized in that the material of the cover plate (10) is metal.

7. A battery cell, comprising:

a battery case (200), the battery case (200) having an opening;

the battery top cover according to any one of claims 1 to 6, wherein the fitting end (101) abuts against the battery case (200), and the mounting boss (102) is provided in the opening and abuts against an inner wall of the battery case (200).

8. The battery cell according to claim 7, wherein the thickness of the cover plate (10) is T1, and the wall thickness of the battery case (200) is T2, wherein the ratio of T1 to T2 is 1 to 5.

9. The battery cell according to claim 7, wherein a pressing portion (104) is formed between an edge surface (103) of the cover plate (10) and the mounting boss (102), the pressing portion (104) having a width direction perpendicular to the edge surface (103), a dimension of the pressing portion (104) in the width direction being L2, a wall thickness of the battery case (200) being T2, wherein T1 and T2 are equal.

10. A battery, comprising:

at least one battery cell according to any one of claims 7 to 9.