CN215644688U

CN215644688U - Battery cover plate assembly and battery

Info

Publication number: CN215644688U
Application number: CN202122331943.0U
Authority: CN
Inventors: 孙倩倩
Original assignee: CALB Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-01-25
Anticipated expiration: 2031-09-26

Abstract

The utility model relates to the technical field of batteries and provides a battery cover plate assembly and a battery. The battery cover plate assembly includes: the cover plate comprises a cover plate body, wherein a liquid injection hole is formed in the cover plate body, and the cover plate body comprises an upper surface and a lower surface; the sealing element is arranged in the liquid injection hole to seal the liquid injection hole; a reinforcement is arranged between the sealing element and the upper surface, and/or a reinforcement is arranged between the sealing element and the lower surface. The sealing member is arranged in the liquid injection hole, so that the sealing of the liquid injection hole is realized, and the reinforcing member is arranged on at least one of the upper surface and the lower surface of the cover plate body, so that the damage to the cover plate body caused by the sealing of the sealing member in the process of injecting the liquid into the liquid injection hole can be avoided, and the performance of the battery cover plate assembly is improved.

Description

Battery cover plate assembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly and a battery.

Background

In the prior art, the battery shell is provided with the liquid injection hole, the self-plugging rivet pull-riveting sealing structure can be adopted for sealing the liquid injection hole, the assembly is simple, and the sealing effect is good.

However, when the casing hardness is less or the casing wall thickness is thinner, adopt self-plugging rivet to rivet seal structure, because the casing can receive the great extrusion of rivet riveting power, rivet seal structure bottom needs the inflation to realize sealed, and is serious to the casing extrusion, and there is the deformation risk casing is thinner.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery cover plate component and a battery, which are used for improving the performance of the battery cover plate component.

According to a first aspect of the present invention, there is provided a battery cover plate assembly comprising:

the cover plate comprises a cover plate body, wherein a liquid injection hole is formed in the cover plate body, and the cover plate body comprises an upper surface and a lower surface;

the sealing element is arranged in the liquid injection hole to seal the liquid injection hole;

a reinforcement is arranged between the sealing element and the upper surface, and/or a reinforcement is arranged between the sealing element and the lower surface.

The battery cover plate component comprises a cover plate body, a sealing element and a reinforcing element, wherein the sealing element is arranged in the liquid injection hole so as to realize the sealing of the liquid injection hole, and the reinforcing element is arranged on at least one of the upper surface and the lower surface of the cover plate body so as to avoid the damage to the cover plate body in the process of sealing the liquid injection hole by the sealing element and improve the performance of the battery cover plate component.

According to a second aspect of the present invention, there is provided a battery comprising the above battery cover plate assembly.

The battery comprises a battery cover plate assembly, the battery cover plate assembly comprises a cover plate body, a sealing element and a reinforcing element, the sealing element is arranged in the liquid injection hole so as to realize the sealing of the liquid injection hole, and the reinforcing element is arranged on at least one of the upper surface and the lower surface of the cover plate body so as to avoid the damage to the cover plate body in the process of sealing the liquid injection hole by the sealing element and improve the performance of the battery cover plate assembly.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic illustration of a seal and rivet combination according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partial structure of a battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a cross-sectional configuration of a battery according to an exemplary embodiment;

fig. 4 is an enlarged schematic view of a structure at a in fig. 3.

The reference numerals are explained below:

10. a cover plate body; 11. a liquid injection hole; 12. an upper surface; 13. a lower surface; 20. a seal member; 21. a sealing cap; 22. a sealing body; 23. a projection; 24. riveting; 25. sealing the core; 26. a mandrel body; 27. a weakened portion; 30. a reinforcement; 40. a seal ring; 70. and (4) a bracket.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery cover assembly, referring to fig. 1 to 4, the battery cover assembly including: the cover plate comprises a cover plate body 10, wherein a liquid injection hole 11 is formed in the cover plate body 10, and the cover plate body 10 comprises an upper surface 12 and a lower surface 13; a sealing member 20, the sealing member 20 being provided in the pour hole 11 to seal the pour hole 11; a reinforcement 30 is provided between the seal 20 and the upper surface 12, and/or a reinforcement 30 is provided between the seal 20 and the lower surface 13.

The battery cover plate component of one embodiment of the utility model comprises a cover plate body 10, a sealing element 20 and a reinforcing element 30, wherein the sealing element 20 is arranged in the liquid injection hole 11 so as to realize the sealing of the liquid injection hole 11, and the reinforcing element 30 is arranged on at least one of the upper surface 12 and the lower surface 13 of the cover plate body 10 so as to avoid the damage to the cover plate body 10 in the process of sealing the liquid injection hole 11 by the sealing element 20, thereby improving the performance of the battery cover plate component.

It should be noted that, because the reinforcing member 30 is disposed between the sealing member 20 and the upper surface 12, and/or the reinforcing member 30 is disposed between the sealing member 20 and the lower surface 13, the reinforcing member 30 can achieve a reinforcing effect on the cover plate body 10, in the installation process of the sealing member 20, no matter the sealing member 20 directly presses the upper surface 12 of the cover plate body 10, or presses the lower surface 13 of the cover plate body 10, the existence of the reinforcing member 30 can increase the capability of the cover plate body 10 against the pressing force, so that the cover plate body 10 can be prevented from being deformed greatly.

In one embodiment, a reinforcement 30 is disposed between the sealing member 20 and the upper surface 12, and if the sealing member 20 directly presses the reinforcement 30, the cover body 10 is not substantially damaged. Alternatively, the sealing member 20 directly presses the cap body 10, but since the presence of the reinforcing member 30 reinforces the cap body 10, the cap body 10 is not likely to be largely deformed.

In one embodiment, a reinforcement 30 is disposed between the sealing member 20 and the lower surface 13, and the sealing member 20 may directly press the reinforcement 30, or the sealing member 20 directly presses the cap body 10.

In one embodiment, the reinforcement 30 is disposed between the sealing member 20 and the upper surface 12, the reinforcement 30 is disposed between the sealing member 20 and the lower surface 13, and the sealing member 20 needs to directly press the reinforcement 30, so that the protection performance of the cover plate body 10 is better.

In one embodiment, the cover body 10 may be a substantially flat plate structure. In certain embodiments, the cover plate body 10 may comprise a receiving space, i.e. the cover plate body 10 may be used to receive at least part of the cell.

It should be noted that, as shown in fig. 2, the lid body 10 is provided with at least two pour holes 11, and the number of the pour holes 11 may be at least two. The sealing member 20 may be press-fitted into the pour hole 11, or the sealing member 20 may be riveted into the pour hole 11.

In one embodiment, the sealing member 20 is a rivet seal structure, so that it is possible to ensure that the sealing member 20 is stably mounted on the cap body 10. The sealing core 25 is arranged in the sealing element 20, the sealing core 25 is riveted with the sealing element 20, and the sealing core 25 can enable the sealing element 20 to swell along the radial direction of the sealing core 25 so as to fix the sealing element 20.

As shown in connection with fig. 1, the blind rivet sealing structure may further include a rivet 24, the rivet 24 including a seal core 25, a mandrel body 26, and a weakened portion 27 between the seal core 25 and the mandrel body 26, the seal core 25 having a radial dimension of the rivet 24 not smaller than the mandrel body 26, the weakened portion 27 having a radial dimension of the rivet 24 smaller than the mandrel body 26. The seal core 25 and the mandrel body 26 can be located within the seal 20, and when the mandrel body 26 is pulled, the seal core 25 will move upward, compressing the seal 20 in a radial direction causing it to expand and increase in size in a radial direction. When pulled to some extent, the rivet 24 can break at the weakened portion 27, allowing the mandrel body 26 to be removed.

In one embodiment, as shown in FIG. 4, the sealing member 20 comprises a sealing cap 21 and a sealing body 22, the sealing cap 21 is located on the upper surface 12, at least a portion of the sealing body 22 is located in the pour hole 11, and the sealing core 25 is located in the sealing body 22. The sealing cap 21 can prevent the sealing member 20 from entering the battery through the pour hole 11, and the sealing body 22 can achieve reliable sealing of the pour hole 11.

In one embodiment, the upper surface 12 of the cover plate body 10 can be disposed in a groove, the sealing cap 21 is disposed in the groove, and the groove is connected to the injection hole 11, the groove can not only accommodate the sealing cap 21, but also prevent the electrolyte from leaking during the injection process. Alternatively, the upper surface 12 of the cap body 10 may be a flat surface, and the sealing cap 21 is disposed to protrude from the upper surface 12 of the cap body 10.

In one embodiment, as shown in fig. 4, one end of the sealing main body 22 protrudes from the lower surface 13, and a protrusion 23 is formed along the radial direction of the sealing main body 22, and the protrusion 23 can prevent the sealing main body 22 from separating from the cover plate body 10, that is, the sealing cap 21 and the protrusion 23 clamp the cover plate body 10, thereby realizing reliable limit of the sealing element 20.

During installation, at least part of the sealing main body 22 can be located in the liquid injection hole 11, and when the mandrel body 26 is pulled, the sealing core 25 moves upwards, and simultaneously, the sealing main body 22 is pressed in the radial direction to expand in the radial direction and increase in size, so that the sealing main body 22 can be in interference fit or transition fit with the liquid injection hole 11, and the sealing cap 21 and the cover plate body 10 are fixedly connected.

Or, during the installation process, part of the sealing main body 22 can be located outside the liquid injection hole 11, and when the mandrel body 26 is pulled, the sealing core 25 moves upwards, and simultaneously, the sealing main body 22 is pressed in the radial direction, so that the sealing main body 22 expands in the radial direction and increases in size, and the part of the sealing main body 22 located outside the liquid injection hole 11 forms the bulge 23, and the bulge 23 can prevent the sealing main body 22 from being separated from the cover plate body 10, namely the sealing cap 21 and the bulge 23 clamp the cover plate body 10, and reliable limit of the sealing element 20 is realized.

In one embodiment, as shown in fig. 4, the reinforcement 30 is located between the lower surface 13 and the protrusion 23, so that the reinforcement 30 can be directly pressed during the process of forming the protrusion 23 in the sealing body 22 to avoid damage to the cap body 10.

In one embodiment, as shown in fig. 4, the battery cover plate assembly further includes: the sealing ring 40 is arranged between the sealing cap 21 and the upper surface 12, the sealing ring 40 is matched with the sealing element 20, and therefore reliable sealing of the liquid injection hole 11 is achieved.

In one embodiment, the battery cover plate assembly further comprises: the seal ring 40 is provided between the reinforcement 30 and the lower surface 13. The sealing ring 40 and the sealing member 20 cooperate to achieve a reliable seal of the pour hole 11.

It should be noted that the sealing ring 40 may be disposed on the upper surface 12 of the cover plate body 10, and/or the sealing ring 40 may be disposed on the lower surface 13 of the cover plate body 10, and the sealing ring 40 may cooperate with the sealing member 20, so as to achieve reliable sealing of the liquid filling hole 11.

In one embodiment, the compression amount of the seal ring 40 is 10% -%, so as to avoid the seal ring 40 from being compressed insufficiently or excessively, thereby improving the sealing effect of the liquid filling hole 11.

In some embodiments, the compression of the seal ring 40 is 20% to 30%, thereby ensuring that the compression of the seal ring 40 is within a reliable range and also ensuring the service life of the seal ring 40.

In one embodiment, the thickness of the reinforcing member 30 clamped between the sealing member 20 and the upper surface 12 is 1mm to 3mm, which not only ensures the protection effect of the reinforcing member 30 on the cover plate body 10, but also does not excessively increase the thickness of the reinforcing member 30.

In one embodiment, the thickness of the reinforcing member 30 clamped between the sealing member 20 and the lower surface 13 is 1mm to 3mm, which not only ensures the protection effect of the reinforcing member 30 on the cover plate body 10, but also does not excessively increase the thickness of the reinforcing member 30.

In one embodiment, the thickness of the cover plate body 10 is 0.1mm to 1mm, and the reinforcement member 30 is provided to prevent the sealing member 20 from damaging the cover plate body 10.

In one embodiment, the material of the reinforcement 30 is selected from electrolyte-resistant hard plastic, which can prevent the reinforcement 30 from being corroded by electrolyte, and one or more of Polyethylene (PE), polypropylene (PP) or plastic material (PPs), wherein the hard plastic has good insulating property and avoids causing safety risk of the battery.

An embodiment of the utility model also provides a battery, which comprises the battery cover plate component.

The battery of one embodiment of the utility model comprises a battery cover plate component, the battery cover plate component comprises a cover plate body 10, a sealing element 20 and a reinforcing element 30, the sealing element 20 is arranged in the liquid injection hole 11 so as to realize the sealing of the liquid injection hole 11, and the reinforcing element 30 is arranged on at least one of the upper surface 12 and the lower surface 13 of the cover plate body 10 so as to avoid the damage to the cover plate body 10 in the process of sealing the liquid injection hole 11 by the sealing element 20, thereby improving the performance of the battery cover plate component.

In one embodiment, as shown in fig. 3 and 4, the battery further includes: the shell piece is connected with the cover plate body 10 to form an accommodating cavity; the battery cell is positioned in the accommodating cavity; the bracket 70 is positioned between the side wall of the accommodating cavity and the battery cell; wherein the reinforcement 30 is connected with the bracket 70. The reinforcing member 30 and the bracket 70 can prevent the battery cell from shaking while improving the strength of the cover plate body 10.

The battery may include a cell and an electrolyte, a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.

The electric core is a laminated electric core, and the electric core is provided with a first pole piece, a second pole piece opposite to the first pole piece in electrical property and a diaphragm piece arranged between the first pole piece and the second pole piece, so that the first pole piece and the second pole piece are stacked to form the laminated electric core.

The battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the cover plate body 10 and the shell member may both form a containing cavity, and after the cover plate body 10 and the shell member are butted, the battery cell is located in a cavity formed by the two containing cavities. The depth of the receiving cavity of the cover plate body 10 and the housing member may be the same or different, and is not limited herein.

In one embodiment, one of the cover body 10 and the housing member is a flat plate, and the other is formed with a receiving cavity.

In one embodiment, the reinforcement member 30 and the bracket 70 may be two separate structures, with the reinforcement member 30 being removably connected to the bracket 70.

In one embodiment, the reinforcing member 30 is integrally formed with the bracket 70, which not only simplifies the manufacturing process, but also ensures sufficient structural strength.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery cover plate assembly, comprising:

the cover plate comprises a cover plate body (10), wherein a liquid injection hole (11) is formed in the cover plate body (10), and the cover plate body (10) comprises an upper surface (12) and a lower surface (13);

a sealing member (20), the sealing member (20) being provided in the pour hole (11) to seal the pour hole (11);

a reinforcement (30), said reinforcement (30) being arranged between said seal (20) and said upper surface (12) and/or said reinforcement (30) being arranged between said seal (20) and said lower surface (13).

2. The battery cover plate assembly of claim 1, wherein the seal (20) is a rivet seal structure.

3. The battery cover plate assembly according to claim 2, wherein the sealing member (20) comprises a sealing cap (21) and a sealing body (22), the sealing cap (21) being located at the upper surface (12), at least part of the sealing body (22) being located within the pour hole (11).

4. The battery cover plate assembly according to claim 3, wherein one end of the sealing body (22) protrudes from the lower surface (13), and a protrusion (23) is formed in a radial direction of the sealing body (22).

5. A battery cover plate assembly according to claim 4, wherein the reinforcement (30) is located between the lower surface (13) and the protrusion (23).

6. The battery cover plate assembly according to any of claims 1 to 5, wherein the thickness of the reinforcement (30) clamped between the seal (20) and the upper surface (12) is 1mm-3 mm; and/or the thickness of the reinforcing element (30) clamped between the sealing element (20) and the lower surface (13) is 1mm-3 mm.

7. The battery cover plate assembly according to any one of claims 1 to 5, wherein the cover plate body (10) has a thickness of 0.1mm-1 mm.

8. A battery comprising the battery cover plate assembly of any one of claims 1 to 7.

9. The battery of claim 8, further comprising:

the cover plate body (10) is connected with the shell piece to form an accommodating cavity;

the battery cell is positioned in the accommodating cavity;

a bracket (70), wherein the bracket (70) is positioned between the side wall of the accommodating cavity and the battery core;

wherein the reinforcement (30) is connected to the bracket (70).

10. The battery according to claim 9, wherein the reinforcement (30) is integrally formed with the bracket (70).