CN219739095U - Cover plate assembly and battery thereof - Google Patents

Abstract

The utility model discloses a cover plate assembly and a battery, wherein a mounting hole is formed in a top cover sheet of the cover plate assembly, a pole is mounted in the mounting hole, and a pole riveting block is used for riveting the pole into the mounting hole on a first end face; the first insulating piece is clamped between the pole riveting block and the first end face, the lower surface of the first connecting section of the first insulating piece is higher than the lower surface of the second connecting section, and a space exists between the second connecting section and the first end face; the blocking part is abutted with the first connecting section. The utility model also provides a battery, which comprises the battery core and the cover plate assembly, wherein the cover plate assembly is electrically connected with the battery core. According to the cover plate assembly, the gap is formed between the cover plate and the first insulating piece at intervals, when the cover plate assembly is assembled and fixed, pressure is applied to the riveting block at the top of the pole to fix the pole, air in the pole can be discharged through the gap, and therefore air pressure balance in the pole is guaranteed.

Description

Cover plate assembly and battery thereof

Technical Field

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

Background

At present, along with the improvement and development of a power battery system, the technical level of a power battery is correspondingly and rapidly improved, and as the power battery is applied to the new energy automobile industry and is very important to the requirements on the performance of a battery core, how to improve the working and safety performance of the battery core becomes one of the main current research and development trends.

In the prior art, the cover plate assembly generally employs an elastic insulating pad to insulate the upper surfaces of the pole and the cover plate, and there is no space between the insulating member and the battery cover plate and the riveting block at the top of the pole.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a cover plate assembly, which is characterized in that a space is arranged between a second connecting section of a first insulating piece and a first end surface, and a blocking part is arranged on the first end surface to block electrolyte from flowing into a mounting hole, so that the safety performance of a battery is improved, and the service life of the battery is prolonged.

The second object of the present utility model is to provide a battery, in which a space is provided between the second connection section and the first end surface of the first insulating member of the cover assembly, and a blocking portion is provided on the first end surface to block the electrolyte from flowing into the mounting hole, so that the safety performance of the battery is improved, and the service life of the battery is prolonged.

One of the purposes of the utility model is realized by adopting the following technical scheme:

a cover plate assembly comprising:

a top cover sheet having a first end face and a second end face facing away from each other; the top cover sheet is provided with a mounting hole which is communicated from the first end face to the second end face;

the pole assembly comprises a pole, a pole riveting block and a first insulating piece, wherein the pole is installed in the installation hole, and the pole riveting block is used for riveting the pole into the installation hole on the first end face; the first insulating piece is clamped between the pole riveting block and the first end face and comprises a first connecting section and a second connecting section, the lower surface of the first connecting section is higher than the lower surface of the second connecting section, and the first connecting section is close to the mounting hole; the second connecting section is far away from the mounting hole, and a gap is formed between the second connecting section and the first end face at intervals;

the blocking part is arranged on the first end face and at least surrounds part of the mounting hole, and is used for blocking electrolyte from flowing into the mounting hole and is abutted with the first connecting section.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the cover plate assembly, the gap is arranged between the cover plate and the first insulating piece, when the cover plate assembly is assembled and fixed, pressure is applied to the riveting block at the top of the pole to fix the pole, and air in the pole can be discharged through the gap, so that air pressure balance in the pole is ensured.

2. According to the cover plate assembly, the blocking part is arranged on the half circumference of the through hole of the cover plate, which is at least close to the liquid injection hole, and because of the existence of the interval, when electrolyte is injected into the liquid injection hole, the electrolyte which drops on the surface of the cover plate can flow into the pole to corrode the sealing ring through the interval, so that the blocking part is arranged on the half circumference of the through hole of the cover plate, which is at least close to the liquid injection hole, and the upper surface of the blocking part is higher than the lower surface of the second insulating piece, so that the electrolyte can be effectively prevented from flowing into the pole from the interval, and the risk that the electrolyte corrodes the sealing ring is reduced.

The second purpose of the utility model is realized by adopting the following technical scheme:

a battery, comprising: the battery cell and the cover plate assembly are electrically connected with the battery cell.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the battery disclosed by the utility model, the space is arranged between the cover plate and the first insulating piece, when the cover plate assembly is assembled and fixed, and the riveting block at the top of the pole is pressurized to fix the pole, air in the pole can be discharged through the space, so that the air pressure balance in the pole is ensured.

2. According to the battery disclosed by the utility model, the blocking part is arranged on the half circumference of the through hole of the cover plate, which is at least close to the liquid injection hole, and because of the existence of the interval, when electrolyte is injected into the liquid injection hole, the electrolyte which drops on the surface of the cover plate can flow into the pole column through the interval to corrode the sealing ring, so that the blocking part is arranged on the half circumference of the through hole of the cover plate, which is at least close to the liquid injection hole, and the upper surface of the blocking part is higher than the lower surface of the second insulating part, so that the electrolyte can be effectively prevented from flowing into the pole column from the interval, and the risk that the electrolyte corrodes the sealing ring is reduced.

Drawings

FIG. 1 is a schematic structural view of a cover plate assembly provided by an embodiment of the present disclosure;

FIG. 2 is an exploded schematic view of a cover plate assembly provided by an embodiment of the present disclosure;

fig. 3 is a partial cross-sectional view of a cover plate assembly provided by an embodiment of the present disclosure.

In the figure: 1. a pole assembly; 11. a pole; 12. a pole rivet block; 2. a top cover sheet; 21. a mounting hole; 211. a blocking portion; 22. a liquid injection hole; 3. a first insulating member; 31. a first connection section; 32. a second connection section; 33. spacing; 34. riveting space; 4. a seal; 41. a first seal segment; 42. a second seal section; 5. and a second insulating member.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and detailed description below:

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The utility model is described in further detail below with reference to the accompanying drawings.

In the case of example 1,

a cover plate assembly as shown in fig. 1 to 3, comprising a top cover plate 2, a pole assembly 1 and a blocking part 211, wherein the top cover plate 2 is provided with a first end surface and a second end surface which are away from each other; the top cover sheet 2 is provided with a mounting hole 21, and the mounting hole 21 penetrates from the first end surface to the second end surface.

The pole assembly 1 comprises a pole 11, a pole riveting block 12 and a first insulating piece 3, wherein the pole 11 is installed in a mounting hole 21, and the pole riveting block 12 is used for riveting the pole 11 into the mounting hole 21 on a first end face; the first insulating part 3 is clamped between the pole riveting block 12 and the first end face, the first insulating part 3 comprises a first connecting section 31 and a second connecting section 32, the lower surface of the first connecting section 31 is higher than the lower surface of the second connecting section 32, and the first connecting section 31 is close to the mounting hole 21; the second connecting section 32 is remote from the mounting hole 21 and a gap 33 is provided between the second connecting section 32 and the first end face.

The blocking portion 211 is disposed on the first end surface and at least encloses a portion of the mounting hole 21, the blocking portion 211 is used for blocking the electrolyte from flowing into the mounting hole 21, and the blocking portion 211 abuts against the first connecting section 31.

On the basis of the above-described structure, in the present embodiment, specifically, the direction in which the pole 11 faces is taken as the upper end face of the top cover sheet 2, that is, the first end face of the top cover sheet 2, and the second end face is the lower end face of the top cover sheet 2. When the pole 11 is mounted in the mounting hole 21, the pole 11 passes through the mounting hole 21 from bottom to top, and is riveted into the mounting hole 21 by the pole riveting block 12, and the first insulator 3 is sandwiched between the pole riveting block 12 and the top cover sheet 2.

The first connecting section 31 of the first insulating member 3 is higher than the second connecting section 32, and a gap 33 exists between the second connecting section 32 and the first end surface of the top cover sheet 2, and when the pole rivet block 12 applies pressure downward to fix the pole 11, the pre-existing air inside the pole 11 can be discharged outward through this gap 33, thereby maintaining the air pressure balance of the battery.

In addition, in the present embodiment, the top cover sheet 2 is further provided with a liquid injection hole 22, and this liquid injection hole 22 is used for injecting the electrolyte into the battery cell, but since there is a gap 33 between the second connection section 32 of the first insulating member 3 and the first end surface of the top cover sheet 2, when the electrolyte is injected into the liquid injection hole 22, the electrolyte easily drops onto the first end surface of the top cover sheet 2, and the electrolyte dropped onto the top cover sheet 2 easily flows into the mounting hole 21 along the gap and flows into the pole 11, and there is a risk of corroding the seal ring.

Therefore, in this embodiment, by providing the blocking portion 211 at the periphery of the mounting hole 21, the blocking portion 211 is at least surrounded on one side of the mounting hole 21 close to the liquid injection hole 22, and the blocking portion 211 can block the electrolyte from flowing into the mounting hole 21, so as to reduce the risk of the electrolyte corroding the seal ring; and this blocking portion 211 abuts against the first connection section 31 of the first insulating member 3, that is, the height of the blocking portion 211 is higher than the height of the gap 33 between the second connection section 32 and the first end face, and the blocking portion 211 cooperates with the first connection section 31 to more effectively block the flow of the electrolyte into the mounting hole 21.

Further, the gap 33 has a height D, the barrier 211 has a height D, D/D is in the range of 0 < D/D.ltoreq.0.9, and D is in the range of 0mm < d.ltoreq.0.1 mm.

On the basis of the above structure, the height D of the gap 33 between the second connecting section 32 and the first end face ranges from more than 0mm to less than or equal to 0.1mm, and the ratio between the height D of the blocking portion 211 and the height D of the gap 33 is more than 0 and less than or equal to 0.9.

Taking d as 0mm as an example, that is, the second connecting section 32 is attached to the first end face at this time, no gap 33 exists between the second connecting section 32 and the first end face, that is, when pressure is applied to the pole riveting block 12 to fix the pole 11, the pole riveting block 12 applies pressure downwards to squeeze the pole 11, a part of gas in the pole 11 can not be discharged, a certain internal pressure is caused in the pole 11, and the internal pressure can continuously apply pressure to the interior of the pole 11, so that the welding life of the interior of the pole 11 is affected. And at this time, since the gap 33 does not exist between the second connection section 32 and the first end face, the electrolyte dropped on the first end face cannot flow into the mounting hole 21 of the pole 11 through the gap 33 regardless of the height of the stopper 211, and corrodes the seal 4.

Taking D as 0.1mm as an example and D/D as 0.9, the height of the blocking portion 211 is about 0.111mm, and the height of the blocking portion 211 is slightly higher than the height of the gap 33 between the second connecting section 32 and the first end surface, that is, when pressure is applied to the pole riveting block 12 to fix the pole 11, the pole riveting block 12 applies pressure downwards to press the pole 11, and a part of gas originally existing inside the pole 11 is discharged through the gap 33, so that balance of internal and external air pressures is maintained. And at this time, since the gap 33 exists between the second connecting section 32 and the first end face, the height of the blocking portion 211 is slightly higher than the height of the gap 33, and when the electrolyte dropped on the first end face flows to the mounting hole 21 through the gap 33, the electrolyte is blocked by the blocking portion 211, so that the risk that the electrolyte enters the inside of the pole 11 and corrodes the sealing member 4 is reduced.

Taking D as 0.1mm as an example and D/D as 0.5, the height of the blocking portion 211 is 0.2mm, and the height of the blocking portion 211 is higher than the height of the gap 33 between the second connecting section 32 and the first end surface, that is, when pressure is applied to the pole riveting block 12 to fix the pole 11, the pole riveting block 12 applies pressure downwards to press the pole 11, and a part of gas originally existing inside the pole 11 is discharged through the gap 33, so that balance of internal and external air pressures is maintained. And at this time, since the gap 33 exists between the second connection section 32 and the first end face, the height of the blocking portion 211 is higher than the height of the gap 33, and when the electrolyte dropped on the first end face flows to the mounting hole 21 through the gap 33, the electrolyte is blocked by the blocking portion 211, thereby further reducing the risk that the electrolyte enters the inside of the pole 11 and corrodes the sealing member 4.

From the above, the greater the height of d, the easier the air inside the pole is discharged; and as the value of D/D is smaller, the gap between the height D of the gap 33 and the height of the blocking portion 211 is larger, and at this time, the blocking portion 211 is more effective in blocking the electrolyte from flowing into the mounting hole 21, further reducing the risk of the electrolyte entering the inside of the mounting hole 21 and corroding the sealing member 4.

Example 2, on the basis of example 1,

further, the blocking portion 211 is a boss protruding from the first end surface, and at least a portion of the mounting hole 21 is surrounded by the boss.

On the basis of the above structure, on the first end face, the blocking portion 211 is shaped as a boss surrounding at least part of the mounting hole 21, and the part is a half of the circumference near the pouring hole 22, that is, a boss structure is provided around at least the half of the circumference of the mounting hole 21 near the pouring hole 22, the boss abuts against the first connection section 31 of the first insulating member 3, and the height of the boss is higher than the second connection section 32 of the first insulating member 3.

The boss protruding from the first end face is arranged on the side, close to the liquid injection hole 22, of the mounting hole 21, and through the cooperation of the boss and the first connecting section 31, electrolyte flowing in through a gap 33 between the second connecting section 32 and the first end face can be effectively prevented from entering the mounting hole 21 by the boss, so that the sealing element 4 is corroded, the working performance of the battery cell is affected, and the service life of the battery is reduced.

It should be noted that, the blocking portion 211 may be provided in other manners besides the boss, for example, a barrier may be provided to block the inflow of the electrolyte, or a waterproof ring may be provided to block the electrolyte, or the like, or may be provided by other manners in the prior art, so long as the sealing member 4 that can effectively block the electrolyte from flowing into the mounting hole 21 and corrode the inside of the pole 11 may be selected and set according to the actual situation.

Further, as shown in fig. 2, the blocking portion 211 is an annular boss, and the annular boss is enclosed in the mounting hole 21.

Based on the above structure, the blocking portion 211 is an annular boss protruding from the first end surface of the cover sheet 2, and the annular boss encloses the entire mounting hole 21.

By surrounding the annular boss on the circumference of the whole mounting hole 21, electrolyte can be further prevented from flowing into the pole 11 from the periphery of the mounting hole 21, so that the sealing element 4 is corroded, the blocking effect of the blocking part 211 is further enhanced, and the working performance and the safety performance of the battery cell are improved.

It should be noted that, the boss may be formed in an irregular shape around the outer periphery of the mounting hole 21, and in this embodiment, the shape of the boss is not limited, and may be rectangular, annular, or the like, and may be selected and set according to the actual situation.

Example 3, on the basis of all the examples described above,

further, as shown in fig. 3, the blocking portion 211 has a third end face and a fourth end face, which are away from each other, the third end face abuts against the first connecting section 31, and the fourth end face is higher than the second end face to form a containing space, and the cover plate assembly further includes a sealing member 4, where the containing space is used for containing the sealing member 4.

On the basis of the above-described structure, in the present embodiment, the third end face of the blocking portion 211 refers to the upper end face of the blocking portion 211, the fourth end face of the blocking portion 211 refers to the lower end face of the blocking portion 211, the third end face of the blocking portion 211 abuts against the first connecting section 31 of the first insulating member 3, and the fourth end face of the blocking portion 211 is higher than the second end face of the top cover sheet 2, so that an accommodation space is formed between the fourth end face of the blocking portion 211 and the second end face of the top cover sheet 2, which can be used to accommodate the sealing member 4.

In the prior art, when the pole 11 is installed in the installation hole 21, the pole 11 passes through the installation hole 21 and fixes the pole 11 in the installation hole 21 through the pole riveting block 12, the transfer sheet is positioned below the pole 11 and is electrically connected with the lower surface of the pole 11, and the sealing piece 4 is arranged among the pole 11, the top cover sheet 2 and the transfer sheet and is used for sealing the installation gap among the pole 11, the top cover sheet 2 and the transfer sheet.

When the pole riveting block 12 pushes down the pole 11 to be fixed, the sealing member 4 pushes up the pole 11 and the switching piece, and in the process of using the battery, the continuous pushing up of the sealing member 4 to the switching piece, the top cover piece 2 and the pole 11 can affect the welding or the connection strength among the pole 11, the top cover piece 2 and the switching piece, which may cause connection failure, and easily cause the electrical connection loss between the battery core and the outside.

Therefore, in this embodiment, an accommodating space is formed between the fourth end surface of the blocking portion 211 and the second end surface of the top cover sheet 2 to accommodate the sealing member 4, so that the compression amount of the sealing member 4 is reduced, the pressure of the sealing member 4 to the top cover sheet 2, the pole 11 and the switching sheet is dispersed, and meanwhile, the blocking portion 211 is equivalent to a reinforcing rib, so that the structural strength of the top cover sheet 2 around the pole 11 can be improved, the connection strength and the connection stability between the top cover sheet 2, the pole 11 and the switching sheet are relatively enhanced, and the service life of the battery cell is further prolonged.

Further, the sealing member 4 includes a first sealing section 41 and a second sealing section 42, the first sealing section 41 is clamped between the pole 11 and the inner wall of the mounting hole 21, and the second sealing section 42 is clamped in the accommodating space.

On the basis of the structure, the sealing element 4 is an L-shaped sealing ring, wherein the first sealing section 41 is an L-shaped vertical section, and the first sealing section 41 is clamped between the pole 11 and the inner wall of the mounting hole 21; the second seal segment 42 is L-shaped horizontal segment, and second seal segment 42 centre gripping is in accommodation space, and first seal segment 41 and second seal segment 42 coact with top cap piece 2, utmost point post 11 and changeover piece in close contact respectively to realize closely laminating between the part and sealed, play sealed effect, improved the gas tightness of battery cover plate.

Of course, the sealing member 4 can also seal the gaps among the pole 11, the top cover sheet 2 and the adapter sheet by adopting different shapes, and can be L-shaped, inverted L-shaped or other shapes in the prior art, and the sealing member 4 can be in close contact with the top cover sheet 2, the pole 11 and the adapter sheet respectively, and can be selected and set according to the actual situation.

Further, the first seal segment 41 and the second seal segment 42 are integrally formed.

In the assembly process, as the first sealing section 41 and the second sealing section 42 are of an integrated structure, an assembly gap 33 cannot be generated, so that the sealing performance of the sealing element 4 can be ensured in the assembly process, in the connection process, the pole riveting block 12 is used for propping against the pole 11, welding the pole 11 and the rotating sheet, the compression amount of the sealing element 4 is ensured through two connection positions, and when the sealing element 4 is compressed, the first sealing section 41 and the second sealing section 42 cannot easily move relatively, so that the gap 33 is generated between the first sealing section 41 and the second sealing section 42, and the sealing performance of the sealing element 4 is reduced.

Of course, besides the above structural arrangement, other embodiments may be adopted, such as that the first sealing section 41 and the second sealing section 42 are separately arranged, and the sealing performance of the sealing element 4 is ensured by compressing the first sealing section 41 and the second sealing section 42, so that the processing difficulty of the sealing element 4 can be reduced, and in the assembling process, the first sealing section 41 is clamped between the pole 11 and the top cover sheet 2, the second sealing section 42 is clamped between the accommodating spaces, so that the sealing element 4 can be better abutted against the top cover sheet 2, the pole 11 and the adapting sheet, which is more convenient, and can be selected and arranged according to the needs of practical situations.

Further, a riveting space 34 is provided on the second connecting section 32, and the riveting space 34 is used for providing a riveting space for the pole riveting block 12.

On the basis of the above structure, in the present embodiment, the second connecting section 32 is provided with the riveting space 34, and this riveting space 34 is disposed on the upper end face of the second connecting section 32, when the pole riveting block 12 presses the pole 11 downward and rivets it to the mounting hole 21, the riveting space 34 on the second connecting section 32 can provide the space for adjusting the pole riveting block 12, so that the pole riveting block 12 can rivet the pole 11 more firmly, and the connection strength of the cover plate assembly is improved.

In the prior art, when the first insulating member 3 is processed, the upper end face of the second connecting section 32 of the first insulating member 3 is sometimes not particularly flat, and if the caulking space 34 is not present, the pole riveting block 12 may not be sufficiently tight in caulking due to partial distortion of the upper end face of the second connecting section 32 during caulking, so that there is a risk of falling off the pole 11.

Therefore, in this embodiment, by providing a riveting space 34 on the upper end surface of the second connection section 32, when the pole riveting block 12 applies pressure downward to fix, a space can be provided for the pole riveting block 12 to adjust, so that the pole 11 can be riveted more firmly, and the connection strength and the connection stability can be enhanced.

Further, the cover plate assembly further comprises a switching piece and a second insulating piece 5, the switching piece is mounted on the second end face and is electrically connected with the pole 11, and the second insulating piece 5 is clamped between the switching piece and the second end face.

On the basis of the structure, the cover plate assembly further comprises a switching sheet, the switching sheet is welded with the lower surface of the pole 11 and is electrically connected with the pole 11, and the switching sheet is also electrically connected with the battery cell, so that the battery cell can transmit electric energy outwards.

The cover plate component is respectively a pole 11, a top cover sheet 2, a second insulating piece 5 and a switching sheet from top to bottom, and the second insulating piece 5 is clamped between the top cover sheet 2 and the switching sheet. Through being equipped with second insulating piece 5 between changeover piece and top cap piece 2, make insulating between changeover piece and the top cap piece 2, avoid also producing electric connection between changeover piece and the top cap piece 2, make whole apron subassembly electrified, cause the influence to the normal work of electric core.

Example 4, on the basis of all the examples described above,

the utility model also provides a battery, which comprises the cover plate assembly and the battery core, wherein the cover plate assembly is electrically connected with the battery core.

Based on the above structure, in this embodiment, the battery further includes a battery case, the battery cell is disposed in the battery case, the cover plate assembly covers the battery case, and the cover plate assembly is electrically connected to the battery cell. At this time, the batteries can be connected in series or in parallel through the connection between the pole 11 and the pole 11, thereby realizing the operation of the batteries.

By adopting the cover plate assembly, the normal working time of the battery can be effectively prolonged, and the safety performance of the battery is improved.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.

Claims (10)

1. A cover plate assembly, comprising:

a top cover sheet (2), the top cover sheet (2) having a first end face and a second end face facing away from each other; the top cover sheet (2) is provided with a mounting hole (21), and the mounting hole (21) penetrates from the first end face to the second end face;

a pole assembly (1), the pole assembly (1) comprising a pole (11), a pole rivet block (12) and a first insulator (3), the pole (11) being mounted in the mounting hole (21), the pole rivet block (12) being used for riveting the pole (11) into the mounting hole (21) on the first end face; the first insulating piece (3) is clamped between the pole riveting block (12) and the first end face, so that the pole riveting block is insulated from the first end face, the first insulating piece (3) comprises a first connecting section (31) and a second connecting section (32), the lower surface of the first connecting section (31) is higher than the lower surface of the second connecting section (32), and the first connecting section (31) is close to the mounting hole (21); the second connecting section (32) is far away from the mounting hole (21), and a gap (33) is formed between the second connecting section (32) and the first end surface at intervals;

and a blocking part (211), wherein the blocking part (211) is arranged on the first end surface and at least surrounds part of the mounting hole (21), and the blocking part (211) is abutted with the lower surface of the first connecting section (31).

2. The cover plate assembly according to claim 1, wherein the gap (33) has a height D, the barrier (211) has a height D, the D/D is in the range of 0 < D/d.ltoreq.0.9, and the D is in the range of 0mm < d.ltoreq.0.1 mm.

3. The cover plate assembly according to claim 1, wherein the blocking portion (211) is a boss protruding from the first end surface, and the boss encloses at least a portion of the mounting hole (21).

4. A cover plate assembly according to claim 3, wherein the blocking portion (211) is an annular boss surrounding the mounting hole (21).

5. The cover plate assembly according to claim 1, characterized in that the blocking part (211) has a third end face and a fourth end face facing away from each other, the third end face abutting against the first connecting section (31), the fourth end face being higher than the second end face to form a receiving space, the cover plate assembly further comprising a sealing element (4) for receiving the sealing element (4).

6. The cover plate assembly according to claim 5, wherein the sealing member (4) comprises a first sealing section (41) and a second sealing section (42), the first sealing section (41) being clamped between the pole (11) and the inner wall of the mounting hole (21), the second sealing section (42) being clamped in the accommodation space.

7. The cover plate assembly according to claim 6, wherein the first sealing section (41) and the second sealing section (42) are of an integrally formed structure.

8. The cover plate assembly according to claim 1, wherein a riveting space (34) is provided on the second connection section (32), and the riveting space (34) is used for providing a riveting space of the pole riveting block (12).

9. The cover plate assembly according to claim 1, further comprising a transition piece mounted to the second end face and electrically connected to the pole (11) and a second insulating member (5); the second insulating piece (5) is clamped between the switching piece and the second end face.

10. A battery, comprising: the cover assembly and the battery cell of any one of claims 1-9, wherein the cover assembly is electrically connected to the battery cell.