CN216213742U - Battery cover plate assembly and battery - Google Patents

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 at least partially arranged in the liquid injection hole so as to seal the liquid injection hole; the insulating part is positioned on the lower surface and comprises a bottom wall and a side wall, and at least one of the bottom wall and the side wall is provided with a through hole; wherein, the orthographic projection of the one end of the sealing member close to the diapire on the diapire all is located the diapire, and sets up with the through-hole interval, can avoid other structures inside the battery to pass through the through-hole and form the electricity with the sealing member and be connected to guarantee reliable insulating effect, thereby improve the performance of battery cover plate subassembly.

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 related art, the battery shell is provided with the liquid injection hole, the sealing of the liquid injection hole can adopt a blind rivet pull-riveting sealing structure, the assembly is simple, and the sealing effect is good.

However, since the lower part of the rivet seal structure occupies a certain internal space, the lower part of the rivet seal structure is close to the battery cell, and the risk of insulation failure exists.

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 at least partially arranged in the liquid injection hole so as to seal the liquid injection hole;

the insulating part is positioned on the lower surface and comprises a bottom wall and a side wall, and at least one of the bottom wall and the side wall is provided with a through hole;

wherein, the orthographic projection of the one end of sealing member near the diapire on the diapire all is located the diapire, and sets up with the through-hole interval.

The battery cover plate component comprises a cover plate body, a sealing element and an insulating element, wherein the sealing element is arranged in the liquid injection hole so as to realize the sealing of the liquid injection hole, the insulating element is arranged on the lower surface of the cover plate body and comprises a bottom wall and a side wall, at least one of the bottom wall and the side wall is provided with a through hole, so that electrolyte can be normally injected through the liquid injection hole and the through hole, the orthographic projection of one end, close to the bottom wall, of the sealing element on the bottom wall is positioned in the bottom wall and is arranged at intervals with the through hole, and other structures in the battery can be prevented from being electrically connected with the sealing element through the through hole, so that the reliable insulating effect is ensured, and the service performance of the battery cover plate component is improved.

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 an insulating element, the sealing element is arranged in a liquid injection hole so as to realize the sealing of the liquid injection hole, the insulating element is arranged on the lower surface of the cover plate body and comprises a bottom wall and a side wall, at least one of the bottom wall and the side wall is provided with a through hole, so that electrolyte can be injected normally through the liquid injection hole and the through hole, the orthographic projections of one end, close to the bottom wall, of the sealing element on the bottom wall are located in the bottom wall and are arranged at intervals with the through hole, and the situation that other structures in the battery are electrically connected with the sealing element through the through hole can be avoided, so that the reliable insulating effect is ensured, and the service performance of the battery is improved.

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 cross-sectional structure of a battery cover plate assembly, according to an exemplary embodiment;

fig. 3 is a schematic structural view illustrating a cover plate body of a battery cover plate assembly according to an exemplary embodiment;

fig. 4 is a schematic cross-sectional structure view of a cover plate body of a battery cover plate assembly according to an exemplary embodiment;

fig. 5 is a perspective view structural diagram illustrating an insulator of a battery cover plate assembly according to an exemplary embodiment;

fig. 6 is a schematic view illustrating another perspective structure of an insulating member of a battery cover plate assembly according to an exemplary embodiment.

The reference numerals are explained below:

10. a cover plate body; 11. a liquid injection hole; 12. an upper surface; 13. a lower surface; 14. a groove; 141. a first opening; 142. a second opening; 15. a reinforcing portion; 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 seal ring; 40. an insulating member; 41. a bottom wall; 42. a side wall; 43. a through hole; 44. a supporting strip; 45. an intersection portion.

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 6, 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 seal member 20, at least part of the seal member 20 being provided in the pour hole 11 to seal the pour hole 11; the insulating part 40, the insulating part 40 locates at the lower surface 13, the insulating part 40 includes the bottom wall 41 and sidewall 42, there is through hole 43 on at least one in bottom wall 41 and sidewall 42; wherein, the orthographic projection of one end of the sealing member 20 close to the bottom wall 41 on the bottom wall 41 is located in the bottom wall 41 and spaced from the through hole 43.

The battery cover plate component comprises a cover plate body 10, a sealing element 20 and an insulating element 40, 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, the insulating element 40 is arranged on the lower surface 13 of the cover plate body 10, the insulating element 40 comprises a bottom wall 41 and a side wall 42, a through hole 43 is formed in at least one of the bottom wall 41 and the side wall 42 so that electrolyte can be normally injected through the liquid injection hole 11 and the through hole 43, the orthographic projections of one end, close to the bottom wall 41, of the sealing element 20 on the bottom wall 41 are both positioned in the bottom wall 41 and are arranged at intervals with the through hole 43, and other structures in the battery can be prevented from being electrically connected with the sealing element 20 through the through hole 43, so that the reliable insulating effect is ensured, and the use performance of the battery cover plate component is improved.

It should be noted that the through hole 43 is communicated with the liquid injection hole 11, so as to ensure that the electrolyte can be injected normally through the liquid injection hole 11 and the through hole 43, and the insulating member 40 can achieve the effect of reliable insulation. The orthographic projection of one end of the sealing element 20 close to the bottom wall 41 on the bottom wall 41 is located in the bottom wall 41 and is arranged at an interval with the through hole 43, namely, the insulating element 40 directly corresponding to the sealing element 20 is of a solid structure, so that the reliable insulation of the sealing element 20 and the internal structure of the battery can be ensured, and the conductive structure is not easily electrically connected with the sealing element 20 through the through hole 43.

The bottom wall 41 and the side wall 42 of the insulating member 40 form a receiving groove structure, and at least one of the bottom wall 41 and the side wall 42 is provided with a through hole 43, and the through hole 43 is communicated with the electrolyte injection hole 11, so that the electrolyte can be normally injected through the electrolyte injection hole 11 and the through hole 43.

It should be noted that the cover plate body 10 includes two opposite upper surfaces 12 and lower surfaces 13, and the lower surface 13 corresponds to the cell of the battery, i.e. the lower surface 13 corresponds to the internal space of the battery.

In some embodiments, the bottom wall 41 of the insulating member 40 is provided with at least two through holes 43, and the number of the through holes 43 may be at least two.

In some embodiments, the sidewall 42 of the insulator 40 is provided with at least two through holes 43, and the number of the through holes 43 may be at least two.

In some embodiments, the bottom wall 41 and the side wall 42 of the insulating member 40 are provided with independent through holes 43, and the number of the through holes 43 on the bottom wall 41 can be at least two, and the number of the through holes 43 on the side wall 42 can be at least two.

In some embodiments, the bottom wall 41 and the side wall 42 of the insulating member 40 are both provided with through holes 43, the through holes 43 may span the bottom wall 41 and the side wall 42, and the number of the through holes 43 may be at least two.

In one embodiment, the bottom wall 41 of the insulator 40 may be formed of a flat plate, which may be provided with a through hole 43. The sidewall 42 of the insulating member 40 may be a through hole section provided on the insulating member 40, and the sidewall of the through hole section is the sidewall 42 of the insulating member 40. Alternatively, the bottom wall 41 and the side wall 42 of the insulating member 40 may be a recessed bottom wall 41 and side wall 42.

In one embodiment, the bottom wall 41 comprises at least two support bars 44, which ensure both a reliable structural strength and an effective insulation effect.

In one embodiment, as shown in fig. 5 and 6, the through holes 43 are formed between the supporting strips 44, so that the bottom wall 41 can be provided with the through holes 43 to facilitate the filling of the electrolyte.

The number of the supporting bars 44 may be two, two supporting bars 44 are arranged to cross each other, and two supporting bars 44 are arranged to be perpendicular to each other, so that 4 through holes 43 may be formed. At least two support bars 44 may be integrally formed.

It should be noted that the bottom wall 41 may be formed by only at least two support bars 44. Alternatively, the bottom wall 41 may comprise at least two support bars 44 and a plate-like structure, to which the at least two support bars 44 are connected.

In one embodiment, as shown in fig. 5, the supporting bars 44 intersect to form an intersection 45, and one end of the sealing member 20 close to the bottom wall 41 is opposite to the intersection 45, so that one end of the sealing member 20 close to the bottom wall 41 is ensured to be directly opposite to a solid structure, thereby avoiding other structures inside the battery from being electrically connected with the sealing member 20 through the through hole 43 to ensure a reliable insulation effect.

In one embodiment, along the height direction of the liquid injection hole 11, the height of the side wall 42 is 1mm-5mm, the height of the side wall 42 is too low, which results in that the internal battery core is closer to the sealing element 20, causing the risk of insulation failure, and the height of the side wall 42 is too high, occupying a larger space inside the battery, and reducing the utilization rate of the whole space inside the battery. The height of the side wall 42 is 1mm-5mm, which not only can effectively realize the insulation effect, but also can prevent the bottom wall 41 and the side wall 42 from occupying larger internal space of the battery.

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. 2 and 4, the groove 14 is arranged on the lower surface 13, the liquid injection hole 11 is communicated with the groove 14, part of the sealing element 20 is positioned in the groove 14, the groove 14 is arranged on the lower surface 13 of the cover plate body 10, and part of the sealing element 20 is positioned in the groove 14, so that the sealing element 20 can be prevented from occupying a large space in the battery, and the utilization rate of the space in the battery is improved. The sealing member 20 is partially positioned in the groove 14, so that the sealing member 20 occupies a certain thickness space of the cap plate body 10, thereby reducing the space occupied by the sealing member 20 inside the battery and improving the utilization rate of the space inside the battery.

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 the cover plate body 10 is provided with at least two liquid injection holes 11, and the number of the liquid injection 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, as shown in FIG. 2, 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, and at least a portion of the sealing body 22 is located in the pour hole 11 and the recess 14. 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. A part of the sealing body 22 is positioned in the groove 14, so that the space occupied by the sealing body 22 in the battery can be reduced, and the utilization rate of the space in the battery can be improved.

In one embodiment, one end of the sealing main body 22 protrudes out of the bottom wall of the groove 14, 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, and reliable limit of the sealing element 20 is realized.

During installation, part of the sealing main body 22 can be positioned outside the liquid injection hole 11, when the mandrel body 26 is pulled, the sealing core 25 moves upwards, and meanwhile, 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, the part of the sealing main body 22 positioned outside the liquid injection hole 11 forms a protruding part 23, and the protruding part 23 can prevent the sealing main body 22 from being separated from the cover plate body 10, namely the sealing cap 21 and the protruding part 23 clamp the cover plate body 10, and reliable limiting of the sealing element 20 is realized.

In one embodiment, the upper surface 12 of the cover plate body 10 can be disposed in a recess, the sealing cap 21 is located in the recess, and the recess is in communication with the injection hole 11, the recess can not only accommodate the sealing cap 21, but also prevent the electrolyte from leaking out 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, the groove 14 includes a first opening 141 and a second opening 142, the second opening 142 is closer to the lower surface 13 than the first opening 141, and the aperture of the second opening 142 is larger than the aperture of the first opening 141, so that the assembly of the sealing member 20 can be facilitated, the assembly efficiency of the sealing member 20 can be improved, and when the sealing member 20 is a rivet sealing structure, a sufficient space can be provided for the expansion of the sealing member 20, so as to ensure that the sealing member 20 is reliably connected to the cover plate body 10, and the sealing member 20 can be prevented from being located in the groove 14 to the maximum extent, so that the sealing member 20 can be prevented from occupying a large space inside the battery, the utilization rate of the space inside the battery can be improved, and the use performance of the battery cover plate assembly can be improved.

In one embodiment, the aperture of the first opening 141 along the extending direction of the second opening 142 gradually increases, that is, the aperture of the groove 14 is a variable aperture structure, so that the groove 14 is not too large on the basis of facilitating the assembly of the sealing member 20 and providing sufficient expansion space, thereby ensuring the structural strength of the cover plate body 10.

It should be noted that, as shown in fig. 4, the groove 14 includes a first opening 141 and a second opening 142, the first opening 141 and the second opening 142 can be respectively understood as openings formed at two opposite ends of a side wall of the groove 14, the opening located on the lower surface 13 is the second opening 142, and the opening located on the bottom wall of the groove 14 is the first opening 141. The aperture of the first opening 141 gradually increases along the extending direction of the second opening 142, that is, the side wall of the groove 14 is inclined from inside to outside, so as to form a variable aperture groove structure.

In one embodiment, as shown in fig. 3 and 4, the upper surface 12 is provided with a reinforcement 15; the reinforcing part 15 and the orthographic projection of the groove 14 on the lower surface 13 are at least partially overlapped, so that the assembling strength of the sealing element 20 can be improved, and the sealing failure caused by the deformation of the cover plate body 10 can be avoided.

In one embodiment, the upper surface 12 is provided with a reinforcement 15; the reinforcing part 15 and the groove 14 are arranged adjacent to each other in the orthographic projection of the lower surface 13, that is, the reinforcing part 15 can improve the assembling strength of the sealing element 20 and avoid the deformation of the cover plate body 10 to cause the sealing failure.

It should be noted that, the reinforcing portion 15 and the groove 14 are disposed adjacent to each other in the orthographic projection of the lower surface 13, that is, the strength of the position where the cover plate body 10 has the groove 14 may be reduced, and in the process of connecting the sealing member 20 and the cover plate body 10, an acting force may be directly applied to the position where the cover plate body 10 has the groove 14, so that the reinforcing portion 15 and the groove 14 are disposed adjacent to each other in the orthographic projection of the lower surface 13, the assembling strength of the sealing member 20 may be improved, and the sealing failure caused by the deformation of the cover plate body 10 may be avoided.

In one embodiment, the sealing member 20 is pressed on the reinforcing portion 15, which not only can prevent the sealing member 20 from crushing the cover plate body 10, but also can ensure the sealing performance of the sealing member 20 to the liquid injection hole 11.

In one embodiment, as shown in FIG. 2, the reinforcement part 15 is provided around the pour hole 11 to form a stepped hole with the pour hole 11, and the battery cover plate assembly further includes: and the sealing ring 30 is positioned between the step surface of the step hole and the sealing element 20, and the sealing ring 30 is matched with the sealing element 20, so that the reliable sealing of the liquid injection hole 11 is realized.

The sealing cap 21 of the sealing element 20 is pressed on the top end of the reinforcing part 15, and the sealing ring 30 is positioned between the stepped surface of the stepped hole and the sealing cap 21, so that not only can the reliable sealing of the sealing ring 30 on the liquid injection hole 11 be ensured, but also the compression amount of the sealing ring 30 can be controlled, and the sealing ring 30 is prevented from being crushed.

In one embodiment, the battery cover plate assembly further includes a sealing ring 30, the sealing ring 30 may be located within the groove 14, and the sealing ring 30 may be compressed between the protrusion 23 and the bottom wall of the groove 14.

In one embodiment, the reinforcement 15 is provided around the pour hole 11 so as to form a stepped hole with the pour hole 11, and the seal member 20 is pressed against the stepped surface of the stepped hole, i.e., a part of the seal member 20 can be located in the stepped hole, so that the seal member 20 can be prevented from occupying a large space of the battery as a whole.

At least a portion of the sealing cap 21 of the sealing member 20 may be located within the stepped bore, and the sealing cap 21 of the sealing member 20 may be directly pressed against the stepped surface of the stepped bore, or the above-described sealing ring 30 may be provided between the sealing cap 21 and the stepped surface of the stepped bore.

In one embodiment, the compression of the seal ring 30 is 10% -50%, so as to avoid the seal ring 30 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 30 is 20% to 30%, thereby ensuring that the compression of the seal ring 30 is within a reliable range and also ensuring the service life of the seal ring 30.

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 assembly, the battery cover plate assembly comprises a cover plate body 10, a sealing element 20 and an insulating element 40, the sealing element 20 is arranged in a liquid injection hole 11 so as to realize the sealing of the liquid injection hole 11, the insulating element 40 is arranged on the lower surface 13 of the cover plate body 10, the insulating element 40 comprises a bottom wall 41 and a side wall 42, a through hole 43 is arranged on at least one of the bottom wall 41 and the side wall 42 so that electrolyte can be injected normally through the liquid injection hole 11 and the through hole 43, the orthographic projection of one end, close to the bottom wall 41, of the sealing element 20 on the bottom wall 41 is positioned in the bottom wall 41 and is arranged at an interval with the through hole 43, and other structures in the battery can be prevented from being electrically connected with the sealing element 20 through the through hole 43, so as to ensure a reliable insulating effect, and further improve the service performance of the battery.

In one embodiment, the battery may include a cell and an electrolyte, the smallest unit capable of performing an electrochemical reaction such as charging/discharging. 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 battery further includes tabs, and two tabs may be led out from the top of the battery cell, that is, the leading direction of the tabs may be perpendicular to the cover plate body 10. Or, two utmost point ears can be drawn forth by two relative lateral parts of electric core, and the direction of drawing forth of utmost point ear can be parallel with apron body 10 promptly, and utmost point ear buckles in both sides, does not occupy the headspace, through being provided with recess 14, can be so that the distance between apron body 10 and the electric core is lower to improve the space utilization of battery.

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 (10)

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 seal member (20), at least a part of the seal member (20) being provided in the pour hole (11) to seal the pour hole (11);

an insulating member (40), the insulating member (40) being located on the lower surface (13), the insulating member (40) including a bottom wall (41) and a side wall (42), at least one of the bottom wall (41) and the side wall (42) being provided with a through hole (43);

wherein, the orthographic projection of one end of the sealing element (20) close to the bottom wall (41) on the bottom wall (41) is positioned in the bottom wall (41) and is arranged at a distance from the through hole (43).

2. The battery cover plate assembly according to claim 1, wherein the bottom wall (41) comprises at least two support bars (44).

3. The battery cover plate assembly according to claim 2, wherein the through holes (43) are formed between the supporting bars (44).

4. The battery cover plate assembly according to claim 2 or 3, wherein each of the support bars (44) intersect to form an intersection (45), and one end of the sealing member (20) near the bottom wall (41) is disposed opposite to the intersection (45).

5. The battery cover plate assembly according to claim 1, wherein the height of the sidewall (42) in the height direction of the pour hole (11) is 1mm to 5 mm.

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

7. The battery cover plate assembly according to claim 6, wherein the lower surface (13) is provided with a groove (14), the liquid injection hole (11) is in communication with the groove (14), and a portion of the sealing member (20) is located in the groove (14).

8. The battery cover plate assembly according to claim 7, 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) and the recess (14).

9. The battery cover plate assembly according to claim 7, wherein the upper surface (12) is provided with a reinforcement (15);

wherein the reinforcement (15) coincides at least partially with the orthographic projection of the groove (14) on the lower surface (13);

alternatively, the reinforcement (15) is arranged adjacent to an orthographic projection of the groove (14) on the lower surface (13).

10. A battery comprising the battery cover plate assembly of any of claims 1-9.

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