CN219419266U - Cover plate assembly, battery and battery device - Google Patents

Abstract

The utility model discloses a cover plate assembly, a battery and a battery device, wherein the cover plate assembly comprises: the top cover plate is provided with two surfaces which are away from each other and provided with mounting holes; a pole assembly comprising a pole; the pole is arranged in the mounting hole, the first end of the pole is provided with an extension section extending towards the direction far away from the mounting hole, and the extension section is opposite to the second end face; the seal is installed between extension and second terminal surface, and the seal has first seal section, and first seal section extends to the direction away from the mounting hole, and first seal section surpasses the radial periphery of extension at least partially. The utility model also provides a battery with the cover plate assembly. According to the utility model, the first sealing section of the sealing element extends along the periphery of the third end and at least partially exceeds the periphery of the third end, so that the gap between the third end and the second end face of the top cover plate is blocked, and electrolyte is prevented from flowing into the battery pole from the gap, thereby relatively enhancing the insulating property of the battery pole.

Description

Cover plate assembly, battery and battery device

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a cover plate assembly, a battery and a battery device.

Background

Currently, with the promotion and development of a power battery system, CIR, CTP, CTC and other technologies are applied to the battery system successively, and the safety performance of the battery system is becoming more and more interesting.

In the prior art, when the battery post and the battery cover plate are assembled, in order to ensure the sealing and insulating properties between the battery post and the top cover plate, a sealing first insulating member needs to be installed between the battery post and the top cover plate. In the prior art, since the battery is placed in the normal position, a sealing member is disposed in a gap between the battery post and the upper opening of the mounting hole of the top cover sheet to seal the upper openings of the mounting holes of the battery post and the top cover sheet; when the battery is inverted, a gap is formed between the lower end face of the top cover sheet and the battery pole, free electrolyte can be gathered on the lower surface of the top cover sheet, so that the electrolyte is easy to enter the gap between the battery pole and the lower end face of the top cover sheet and flows into the battery pole from the gap, and the risk of reduced insulating performance of the battery pole is easily caused.

Disclosure of Invention

In order to overcome the deficiencies of the prior art, it is an object of the present utility model to provide a cover plate assembly that seals the gap between the battery post and the lower end face of the top cap piece by extending the first seal segment of the seal along and at least partially beyond the radial outer periphery of the third end of the post.

It is a second object of the present utility model to provide a battery in which the first seal segment of the seal member extends along and at least partially beyond the radial outer periphery of the third end of the post by the cover plate assembly, thereby sealing the gap between the battery post and the lower end face of the top cap plate.

It is a further object of the present utility model to provide a battery device in which the battery is inverted by disposing the cover plate assembly of the battery toward the bottom plate.

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 plate is provided with a mounting hole which is communicated from the first end face to the second end face;

a pole assembly comprising a pole; the pole is arranged in the mounting hole and provided with a first end extending out of the second end surface, the first end is provided with an extension section extending towards the direction away from the mounting hole, and the extension section is opposite to the second end surface;

the sealing piece is arranged between the extending section and the second end face and is provided with a first sealing section, the first sealing section extends away from the direction of the mounting hole, and the first sealing section at least partially exceeds the radial periphery of the extending section.

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

according to the cover plate assembly, the first sealing section of the sealing element extends along the periphery of the third end and at least partially exceeds the periphery of the third end, when the battery is inverted, free electrolyte can be gathered on the lower surface of the top cover plate, but due to the fact that the sealing element partially exceeds the periphery of the third end, the sealing element can seal the gap between the third end and the second end face of the top cover plate, and the electrolyte is prevented from flowing into the battery pole from the gap, so that the insulating performance of the battery pole is relatively enhanced.

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

a battery, comprising: the cover plate assembly, the battery cell and the battery shell are arranged in the battery shell, and the cover plate assembly is used for sealing the battery shell and is electrically connected with the battery cell.

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

according to the battery, the first sealing section of the sealing element extends along the periphery of the third end and at least partially exceeds the periphery of the third end on the cover plate assembly, when the battery is inverted, free electrolyte can be gathered on the lower surface of the top cover plate, but due to the fact that the sealing element partially exceeds the periphery of the third end, the sealing element can seal the gap between the third end and the second end face of the top cover plate, and electrolyte is prevented from flowing into the battery pole from the gap, so that the insulating performance of the battery pole is relatively enhanced.

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

a battery device, comprising:

the battery box body comprises a bottom plate and a main frame, and the main frame is connected with the bottom plate;

and a plurality of batteries are arranged in the battery box body, and the cover plate component is arranged towards the bottom plate.

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

the battery device of this application sets up towards the bottom plate through the apron subassembly of battery, when the battery inverts, and free electrolyte can gather at the lower surface of top cap piece, but because the sealing member part surpasss the periphery of third end, consequently the sealing member can shutoff third end and this clearance of the second terminal surface of top cap piece to block the electrolyte and flow into the battery post from this clearance, thereby strengthened the insulating properties of battery post relatively.

Drawings

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

FIG. 2 is a partially exploded schematic illustration 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 top cover sheet; 11. a first end face; 12. a second end face; 13. a mounting hole; 2. a pole assembly; 21. a pole; 211. a first end; 212. an extension section; 22. a first insulating member; 221. a first insulating section; 222. a second insulating section; 23. a second insulating member; 24. a pole rivet block; 3. a seal; 31. a first seal segment; 32. and a second seal segment.

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 1, a pole assembly 2 and a sealing member 3, the top cover plate 1 having a first end face 11 and a second end face 12 facing away from each other; the top cover sheet 1 is provided with a mounting hole 13, and the mounting hole 13 penetrates from the first end face 11 to the second end face 12; the pole assembly 2 comprises a pole 21; the pole 21 is installed in the installation hole 13, the pole 21 is provided with a first end 211 extending out of the second end face 12, the first end 211 is provided with an extension section 212 extending towards the direction away from the installation hole 13, and the extension section 212 is opposite to the second end face 12; the seal 3 is mounted between the extension 212 and the second end face 12, the seal 3 having a first seal segment 31, the first seal segment 31 extending away from the mounting hole 13, the first seal segment 31 at least partially exceeding the radial outer periphery of the extension 212.

On the basis of the above-described structure, in the present embodiment, specifically, the direction in which the pole 21 faces is taken as the upper end face of the top cover sheet 1, that is, the first end face 11 of the top cover sheet 1 is the upper end face of the top cover sheet 1, the second end face 12 of the top cover sheet 1 is the lower end face of the top cover sheet 1, and the first end 211 of the pole 21 protruding from the second end face 12 is the lower end of the pole 21.

During assembly, the pole 21 is mounted in the mounting hole 13 with the first end 211 of the pole 21 projecting downwardly from the pole 21, an extension 212 extending away from the mounting hole 13 being provided at the first end 211 and the extension 212 being opposite the second end face 12 of the cap piece 1, i.e. a gap is formed between the extension 212 and the cap piece 1, and the seal 3 is clamped in this gap, the first seal section 31 of the seal 3 extending away from the mounting hole 13 and beyond the extension 212.

When the battery is inverted, free electrolyte accumulates in the direction of the second end face 12 of the top cap sheet 1 and the first end 211 of the pole 21, and if electrolyte enters from the gap between the second end face 12 of the top cap sheet 1 and the first end 211 of the pole 21, the electrolyte has conductivity, and after entering the gap, electrical connection between the pole 21 and the top cap sheet 1 is easily caused, which may cause a short circuit of the pole 21.

Therefore, in this embodiment, the first sealing section 31 of the sealing member 3 extends away from the mounting hole 13 and exceeds the extension section 212, and this sealing member 3 is sandwiched in the gap between the second end face 12 of the top cover sheet 1 and the first end 211 of the pole 21, after the battery is inverted, the free electrolyte is blocked by the first sealing section 31 of this sealing member 3, so that the probability that the electrolyte enters the pole 21 and the mounting hole 13 through the gap is reduced, and since the first sealing section 31 exceeds the extension section 212, the portion exceeding the extension section 212 can further block the free electrolyte, which is equivalent to enlarging the blocking area of the sealing member 3, and further reducing the probability that the electrolyte enters the gap between the top cover sheet 1 and the pole 21.

Further, as shown in fig. 3, the seal member 3 includes a second seal segment 32, the second seal segment 32 is connected to the first seal segment 31, and the second seal segment 32 extends in a direction away from the second end face 12 and wraps around the outer peripheral surface of the extension segment 212.

On the basis of the above structure, the seal 3 further includes the second seal segment 32, the second seal segment 32 is on the outside of the first seal segment 31 beyond the extension segment 212, and the second seal segment 32 is connected to the first seal segment 31, the second seal segment 32 extends in a direction away from the second end face 12, i.e., extends downward, and abuts against and covers the outer peripheral surface of the extension segment 212.

In this embodiment, specifically, the first seal segment 31 and the second seal segment 32 are integrally formed, by providing the second seal segment 32, the seal member 3 covers the gap between the extension segment 212 and the top cover sheet 1, and also covers the outer peripheral surface of the extension segment 212, which is equivalent to covering the assembly gap between the extension segment 212 and the first seal member 3, so that the tightness of the seal member 3 is enhanced, the seal member 3 not only has the opportunity of blocking the electrolyte from entering from the gap between the top cover sheet 1 and the extension segment 212 of the pole 21 in the transverse direction, but also can effectively prevent the electrolyte from entering into the gap in the longitudinal direction, and further reduces the probability of the electrolyte from entering into the gap between the top cover sheet 1 and the pole 21.

Example 2 based on the structure of example 1 described above,

further, as shown in fig. 2 and 3, the pole assembly 2 includes a first insulating member 22, the first insulating member 22 is mounted in the mounting hole 13, the first insulating member 22 includes a first insulating section 221 and a second insulating section 222, the first insulating section 221 is clamped between the pole 21 and the inner wall of the mounting hole 13, and the second insulating section 222 is clamped between the extension section 212 and the second end face 12.

On the basis of the above structure, the pole assembly 2 includes the first insulating member 22, and during assembly, the first insulating member 22 is close to the pole 21, and the first insulating section 221 of the first insulating member 22 is clamped between the pole 21 and the inner wall of the mounting hole 13, the second insulating section 222 is clamped between the extension section 212 and the second end face 12, and the sealing member 3 is enclosed around the second insulating section 222.

In the assembly process, insulation is ensured between the pole 21 and the top cover sheet 1, and the pole 21 and the top cover sheet 1 are prevented from being electrically connected to cause a short circuit of the pole 21, so in this embodiment, in order to prevent direct contact between the pole 21 and the top cover sheet 1, a first insulation member 22 needs to be provided to space the pole 21 from the top cover sheet 1. Three opposite faces of the pole 21 and the top cover sheet 1, which need to be insulated, are the first one, wherein the first end face 11 of the top cover sheet 1 and the upper end of the pole 21 are spaced; the second is that the second end face 12 of the cover sheet 1 is spaced from the extension 212 of the pole 21; the third is that the inner wall of the mounting hole 13 is spaced from the post 21.

Therefore, specifically, the first insulating member 22 is an L-shaped structure, the first insulating section 221 is an L-shaped vertical section, the second insulating section 222 is an L-shaped lateral section, the first insulating section 221 is sandwiched between the pole 21 and the inner wall of the mounting hole 13 of the top cover sheet 1, the outer peripheral surface of the pole 21 is spaced apart from the inner wall of the mounting hole 13 of the top cover sheet 1, and the second insulating section 222 is sandwiched between the extending section 212 and the second end face 12, so that the extending section 212 is spaced apart from the second end face 12 of the top cover sheet 1, and the first insulating section 221 and the second insulating section 222 are integrally formed, so that no assembly gap exists between the first insulating section 221 and the second insulating section 222, and the insulating effect is better.

It should be noted that, in addition to the L-shaped structure, the first insulating member 22 may have other structures, such as a two-stage structure in which the first insulating section 221 and the second insulating section 222 are separated, the first insulating section 221 and the second insulating section 222 are separately processed and separately assembled, or other structures in the prior art, only the pole 21 and the top cover sheet 1 need to be spaced apart from each other at several opposite surfaces.

Further, as shown in fig. 3, the first insulating section 221 extends toward the first end face 11 and is higher than the first end face 11.

On the basis of the above structure, the first insulating section 221 extends to a height higher than the first end face 11 of the top cover sheet 1, i.e., the first insulating section 221 completely separates the opposing face between the pole 21 and the inner wall of the mounting hole 13.

Since insulation between the pole 21 and the top cover sheet 1 is required to be ensured and the pole 21 and the inner wall of the mounting hole 13 are required to be spaced apart during the assembly process, the pole 21 and the inner wall of the mounting hole 13 are effectively prevented from being electrically connected by the first insulation segment 221 by extending the first insulation segment 221 in the direction of the first end face 11, that is, upward, and making the end of the first insulation segment 221 higher than the first end face 11, that is, extending the first insulation segment 221 out of the first end face 11, so that the pole 21 and the inner wall of the mounting hole 13 are completely spaced apart by the first insulation segment 221.

Further, the first insulating member 22 is a hard insulating member; the second insulating section 222 extends away from the mounting hole 13, and the thickness of the second insulating section 222 is equal to that of the first sealing section 31.

On the basis of the above structure, the first insulating member 22 is a hard insulating member, that is, the first insulating member 22 is difficult to compress during the assembly process, the second insulating section 222 is assembled between the extension section 212 and the second end face 12 of the top cover sheet 1, and the thickness of the second insulating section 222 is equal to the thickness of the first sealing section 31 after being compressed, that is, the thickness of the second insulating section 222 defines the thickness of the first sealing section 31, so that the compression is stopped after the first sealing section 31 is compressed to the thickness of the second insulating section 222.

In the present embodiment, the seal member 3 has elasticity, when the seal member 3 is clamped between the extension section 212 and the second end face 12, in order to ensure a good sealing effect of the seal member 3, it is necessary to press the seal member 3 when assembling the seal member 3 so that the seal member 3 completely seals the gap between the extension section 212 and the second end face 12, thereby enabling the seal member 3 to have a good sealing effect, and after the first seal section 31 of the seal member 3 is pressed, the thickness of the first seal section 31 is reduced by compression, thereby enabling the first seal section 31 to completely seal the gap.

If the compression amount of the first seal segment 31 is insufficient, the sealing effect of the first seal segment 31 against the gap between the extension segment 212 and the second end face 12 of the roof sheet 1 is poor; if the amount of compression of the first seal segment 31 is too great, the pressure between the extension segment 212 and the second end face 12 of the top cover sheet 1 after the first seal segment 31 is compressed will also increase, with the risk of damaging the top cover sheet 1 and the pole piece 21.

It is therefore ensured that the amount of compression of the first seal segment 31 cannot be too small nor too large, in this embodiment the amount of compression of the first seal segment 31 is defined by defining the thickness of the second insulating segment 222. In the assembly process, when the first sealing section 31 is simultaneously extruded by the extension section 212 of the pole 21 and the second end face 12 of the top cover plate 1, the thickness extruded to the second insulating section 222 is pushed by the second insulating section 222, so that the first sealing section 31 cannot be continuously extruded, the proper compression amount of the first sealing section 31 is ensured, the sealing performance of the first sealing section 31 is ensured, and the risk of damage to the extension section 212 of the pole 21 and the top cover plate 1 caused by overlarge compression amount of the first sealing section 31 can be effectively reduced.

It should be noted that, the second insulating member 23 is a hard insulating member, and may be made of plastic, or made of a hard insulating material in the prior art, and only needs to be able to space and insulate the pole 21 from the top cover sheet 1.

Further, as shown in fig. 2 and 3, the pole assembly 2 further includes a second insulating member 23 and a pole riveting block 24, the pole riveting block 24 is used for riveting the pole 21 into the mounting hole 13 on the first end face 11, and the second insulating member 23 is sandwiched between the pole riveting block 24 and the first end face 11.

On the basis of the structure, the pole assembly 2 further comprises a pole riveting block 24 and a second insulating piece 23, the pole riveting block 24 is used for fixing the pole 21 in the mounting hole 13, the second insulating piece 23 is used for separating the upper end of the pole 21 from the first end face 11 of the top cover sheet 1, and the upper end of the pole 21 is prevented from being electrically connected with the first end face 11 of the top cover sheet 1 in a contact manner, so that the risk of short circuit of the pole 21 is reduced.

The side of the pole 21 is separated from the inner wall of the mounting hole 13 by the first insulating section 221 of the first insulating member 22, the extending section 212 of the pole 21 is separated from the second end face 12 of the top cover piece 1 by the second insulating section 222, and the upper end of the pole 21 is separated from the first end face 11 of the top cover piece 1 by the second insulating member 23, so that three opposite faces between the pole 21 and the top cover piece 1 are separated by the insulating members, and the risk that the pole 21 and the top cover piece 1 are in contact and electric connection to cause a short circuit of the pole 21 is effectively reduced.

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

further, the second insulating member 23 is integrally formed with the first insulating member 22.

On the basis of the above structure, the second insulating member 23 is integrally formed with the first insulating section 221 of the first insulating member 22, that is, during the processing, the second insulating member 23 and the first insulating member 22 are integrally formed, and these two insulating members are combined into one insulating member for processing.

The process that sets up so can reduce the assembly improves assembly efficiency. And the assembly gap between the first insulating piece 22 and the second insulating piece 23 is eliminated, so that the insulating effect of the insulating pieces is improved, the pole column 21 and the top cover sheet 1 can be more effectively separated, and a better insulating effect is achieved.

Of course, the first insulating member 22 and the second insulating member 23 may be separately machined and separately assembled, and when the first insulating member 22 and the second insulating member 23 are separated into two parts, the machining difficulty is reduced, and the first insulating member and the second insulating member may be selected and set according to the actual situation.

Further, the radially outer end face of the second insulating section 222 is provided with a bevel that gradually slopes toward the pole 21 from near the second end face 12 to far from the second end face 12.

On the basis of the above-described structure, on the radially outer end face of the second insulating section 222 of the first insulating member 22, there is provided an oblique angle that gradually slopes toward the pole 21 from near the second end face 12 to far from the second end face 12, i.e., the oblique angle gradually slopes toward the pole 21 from top to bottom.

When the first insulating section 221 of the first insulating member 22 and the second insulating member 23 are integrally formed, in the assembly process, the insulating member needs to be clamped between the pole 21 and the gap of the mounting hole 13 from top to bottom, and an oblique angle is arranged on the radial outer end surface of the second insulating section 222, so that the installation of the insulating member is smoother due to the installation guiding of the oblique angle in the installation process.

Further, the pole assembly 2 includes a plurality of first insulating members 22, and the plurality of first insulating members 22 are disposed at intervals in the circumferential direction of the pole 21.

On the basis of the above-described structure, the pole assembly 2 may include a plurality of first insulating members 22, and these first insulating members 22 are spaced apart in the circumferential direction of the pole 21, so that the plurality of first insulating members 22 can separate the pole 21 from the inner wall of the mounting hole 13 and the second end face 12 of the cap sheet 1 in the circumferential direction of the pole 21.

The plurality of first insulating members 22 are respectively provided at intervals in the circumferential direction of the pole 21, and then the first insulating members 22 are provided between the pole 21 and the inner wall of the mounting hole 13, and between the pole 21 and the second end face 12 of the top cover sheet 1 in the circumferential direction so as to space the pole 21 from the top cover sheet 1. Compared with the arrangement of only one first insulating member 22 surrounding the pole 21 in the circumferential direction, the arrangement of a plurality of first insulating members 22 and the spaced distribution of the first insulating members 22 in the circumferential direction of the pole 21 ensures good insulating effect, and the required cost is reduced instead.

Example 4 based on the above structure,

the application also provides a battery, including as above apron subassembly, electric core and battery case, the electric core is installed in the battery case, and apron subassembly is used for closing cap battery case, utmost point post 21 and electric core electric connection.

On the basis of the above structure, in this embodiment, the battery further includes a battery housing, the battery core is disposed in the battery housing, the cover plate assembly covers the battery housing, and the electrode posts 21 on the cover plate assembly are electrically connected with the battery housing, and at this time, connection between the electrode posts 21 of different batteries and the electrode posts 21 is achieved in series or in parallel, so as to achieve the operation of the battery.

Through adopting foretell apron subassembly, when the battery is invertd, free electrolyte can gather at the lower surface of top cap piece 1 and the lower terminal surface of utmost point post 21, but owing to the sealing member 3 that sets up to first seal segment 31 centre gripping is between the second terminal surface 12 of top cap piece 1 and the extension section 212 of utmost point post 21, and the outer terminal surface of extension section 212 is wrapped to second seal segment 32 to can effectively block the clearance inflow between top cap piece 1 and the utmost point post 21 of electrolyte, the insulating properties of battery utmost point post 21 has been strengthened relatively.

Example 5 based on the above structure,

the application also provides a battery device, which comprises a battery box body and a plurality of batteries, wherein the battery box body comprises a bottom plate and a main frame, and the main frame is connected with the bottom plate; the battery is installed in the battery box, and the apron subassembly sets up towards the bottom plate.

On the basis of the above-described structure, in the present embodiment, the lid assembly of the battery is disposed toward the bottom plate, that is, during the assembly of the battery device, the end face of the lid assembly of the battery is first put into the case so that the post 21 of the battery is directed toward the bottom plate of the battery case.

The battery is inverted, the cover plate component of the battery faces downwards, free electrolyte of the battery core can be gathered on the second end face of the top cover plate, and due to the sealing piece 3, the first sealing section 31 is clamped between the second end face 12 of the top cover plate 1 and the extending section 212 of the pole column 21, and the second sealing section 32 covers the outer end face of the extending section 212, so that the electrolyte can be effectively prevented from flowing in from a gap between the top cover plate 1 and the pole column 21, and the insulating performance of the pole column 21 of the battery is relatively enhanced.

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 (11)

1. A cover plate assembly, comprising:

a top cover sheet (1), the top cover sheet (1) having a first end face (11) and a second end face (12) facing away from each other; the top cover sheet (1) is provided with a mounting hole (13), and the mounting hole (13) penetrates from the first end face (11) to the second end face (12);

-a pole assembly (2), the pole assembly (2) comprising a pole (21); the pole (21) is mounted in the mounting hole (13), the pole (21) is provided with a first end (211) extending out of the second end face (12), the first end (211) is provided with an extension section (212) extending towards the direction away from the mounting hole (13), and the extension section (212) is opposite to the second end face (12);

the sealing element (3), the sealing element (3) is installed between extension section (212) and second terminal surface (12), sealing element (3) have first seal section (31), first seal section (31) are to keeping away from mounting hole (13) direction extension, first seal section (31) are at least partly surpassed the radial periphery of extension section (212).

2. The cover plate assembly according to claim 1, wherein the sealing member (3) comprises a second sealing section (32), the second sealing section (32) is connected with the first sealing section (31), and the second sealing section (32) extends towards a direction away from the second end face (12) and is coated on the outer peripheral surface of the extending section (212).

3. The cover plate assembly according to claim 1 or 2, wherein the pole assembly (2) comprises a first insulating member (22), the first insulating member (22) is mounted in the mounting hole (13), the first insulating member (22) comprises a first insulating section (221) and a second insulating section (222), the first insulating section (221) is clamped between the pole (21) and the inner wall of the mounting hole (13), and the second insulating section (222) is clamped between the extension section (212) and the second end face (12).

4. A cover plate assembly according to claim 3, characterized in that the first insulating section (221) extends towards the first end face (11) and is higher than the first end face (11).

5. A cover plate assembly according to claim 3, wherein the first insulating member (22) is a rigid insulating member; the second insulating section (222) extends towards a direction away from the mounting hole (13), and the thickness of the second insulating section (222) is equal to that of the first sealing section (31).

6. A cover plate assembly according to claim 3, wherein the pole assembly (2) further comprises a second insulator (23) and a pole rivet block (24), the pole rivet block (24) being used for riveting the pole (21) into the mounting hole (13) on the first end face (11), the second insulator (23) being sandwiched between the pole rivet block (24) and the first end face (11).

7. The cover plate assembly according to claim 6, wherein the second insulating member (23) is integrally formed with the first insulating member (22).

8. The cover plate assembly according to claim 7, wherein a radially outer end face of the second insulating section (222) is provided with an oblique angle gradually sloping from being closer to the second end face (12) to being farther from the second end face (12) towards the pole (21).

9. A cover plate assembly according to claim 3, wherein the pole assembly (2) comprises a plurality of first insulating members (22), the plurality of first insulating members (22) being arranged at intervals in the circumferential direction of the pole (21).

10. A battery, comprising: the cover plate assembly, the battery cell and the battery case according to any one of claims 1-9, wherein the battery cell is mounted in the battery case, the cover plate assembly is used for sealing the battery case, and the pole (21) is electrically connected with the battery cell.

11. A battery device, characterized by comprising:

the battery box body comprises a bottom plate and a main frame, and the main frame is connected with the bottom plate;

the plurality of cells of claim 10, the cells being mounted in the cell housing, the cover assembly being disposed toward the base plate.