WO2023143083A1

WO2023143083A1 - Battery cover plate assembly, battery housing, and battery

Info

Publication number: WO2023143083A1
Application number: PCT/CN2023/071731
Authority: WO
Inventors: 梁立维; 汤国胜; 张剑; 欧阳进忠
Original assignee: 比亚迪股份有限公司
Priority date: 2022-01-27
Filing date: 2023-01-10
Publication date: 2023-08-03
Also published as: CN216980726U

Abstract

A battery cover plate assembly, a battery housing, and a battery. The battery cover plate assembly comprises a cover plate body and a pole; a pole hole is formed on the cover plate body; the pole comprises an inserting portion and a covering portion; the inserting portion is inserted into the pole hole; the covering portion protrudes out of the cover plate body in the axial direction of the pole hole; the covering portion extends in the radial direction of the pole hole, so that the projection of the covering portion on the cover plate body in the axial direction of the pole hole is located in the cover plate body; and a distance between the edge of the covering portion far away from the pole hole in the radial direction of the pole hole and the hole wall of the pole hole is greater than or equal to 1.5 mm.

Description

Battery cover assembly, battery case, and battery

This application claims the priority of a Chinese patent application with application number 202220234704.5 and application title "Battery Cover Assembly, Battery Case, and Battery" filed with the China Patent Office on January 27, 2022, the entire contents of which are incorporated herein by reference. Applying.

technical field

The present disclosure relates to the technical field of batteries, and in particular, to a battery cover assembly, a battery casing and a battery.

Background technique

An existing battery includes a battery cell and a battery cover disposed above the battery cell, and the electrodes on the battery cell body need to output electric energy through poles on the battery cover. The pole on the battery cover needs to be connected to the cell body inside the battery case and the load outside the battery case. In order to ensure that the chemical reaction that generates electric energy inside the cell body is not affected by external water vapor, it is very important to seal the pole hole. important. In the prior art, the pole includes an insertion part and a cover part. The insertion part is inserted into the pole hole, and the cover part covers the pole hole. However, due to the short effective sealing length between the pole and the battery cover, some External water vapor can still enter the interior of the battery casing through the gap between the covering part and the battery cover, causing a problem of sealing failure.

Contents of the invention

The purpose of the present disclosure is to provide a battery cover assembly, a battery casing and a battery to solve the technical problems in the related art.

In order to achieve the above purpose, according to the first aspect of the present disclosure, a battery cover assembly is provided, including:

A cover plate body, where pole holes are formed on the cover plate body;

The pole includes an insertion part and a cover part, the insertion part is inserted into the pole hole, the cover part protrudes from the cover body along the axial direction of the pole hole, and the cover part protrudes from the cover body along the pole hole. The radial extension of the pole hole is such that the projection of the covering part on the cover body along the axial direction of the pole hole is located in the cover body, and the covering part is located along the pole The distance between the edge of the pole hole radially away from the pole hole and the hole wall of the pole hole is greater than or equal to 1.5 mm. The covering part of the present disclosure extends radially along the pole hole, and by extending the radial dimension of the covering part, the flow path for external water vapor to enter the battery casing through the gap between the covering part and the cover plate body can be increased, thereby reducing the The leak rate improves the stability of the battery, and the above method will not increase the axial size of the pole, which is more convenient for the installation and arrangement of the battery body.

Optionally, the cover part protrudes downward from the cover plate body along the axial direction of the pole hole, so that the cover part can be located inside the battery case, and the cover part is used for cooperating with the The tabs of the cells inside the battery case are electrically connected.

Optionally, the covering portion protrudes upward from the cover plate body along the axial direction of the pole hole, so that the covering portion can be located outside the battery casing, and the insertion portion is used to communicate with the battery The tabs of the cells inside the casing are electrically connected.

Optionally, the tab is a positive tab of the cell.

Optionally, the tab is a negative tab of the cell.

Optionally, the insertion part includes a conductive column and a conductive plate, the conductive column is formed on the cover part, and the conductive plate protrudes from the outer peripheral surface of the conductive column along the radial direction of the conductive column. The conductive pillar.

Optionally, the conductive plate is integrally formed with the conductive column.

Optionally, the conductive plate is connected to the conductive column.

Optionally, the conductive pillar is inserted into the pole hole.

Optionally, the conductive column includes a column body and an annular flange formed at an end of the column body away from the cover portion, and a first through hole is formed on the conductive plate and connected to the first through hole. connected second through holes, the diameter of the first through hole is smaller than the diameter of the second through hole, so that a stepped surface is formed between the first through hole and the second through hole, and the cylinder Inserted into the first through hole, the annular flange is located in the second through hole and connected to the stepped surface.

Optionally, the outer surface of the annular flange is flush with the outer surface of the conductive plate.

Optionally, the annular flange abuts against the stepped surface.

Optionally, the maximum dimension of the insertion part in the radial direction of the pole hole is in the range of 0.8mm-1.5mm.

Optionally, the battery cover assembly further includes an insulator, the insulator is mounted on the pole and clamped between the cover part and the cover body.

Optionally, the insulating member has a thickness ranging from 0.1 mm to 0.2 mm.

Optionally, the insulator is sealed and connected to the cover portion and the cover body respectively.

Optionally, the outer edge of the insulator protrudes beyond the outer edge of the cover part along the radial direction of the pole hole, and the outer edge of the insulator and the outer edge of the cover body are in the The radial spacing of the pole holes is 1mm-1.5mm; or,

The outer edge of the cover part protrudes from the outer edge of the insulator along the radial direction of the pole hole, or is flush with the outer edge of the insulator, and the outer edge of the cover part is aligned with the cover The distance between the outer edge of the plate body in the radial direction of the pole hole is 1mm-1.5mm.

According to a second aspect of the present disclosure, there is provided a battery case, comprising a case seat and the battery cover assembly as described above, the cover body of the battery cover assembly is covered on the case seat.

According to a third aspect of the present disclosure, there is provided a battery, including the above-mentioned battery case and a battery cell installed in the battery case.

Through the above technical solution, the pole includes an insertion portion and a cover portion, and the cover portion extends along the radial direction of the pole hole, so that the projection of the cover portion on the cover body along the axial direction of the pole hole is located in the cover body, and The distance between the cover portion away from the edge of the pole hole along the radial direction of the pole hole and the hole wall of the pole hole is greater than or equal to 1.5mm. Compared with the prior art, the cover portion of the present disclosure is more By extending the size of the cover part in the radial direction of the pole hole, and making the distance between the cover part away from the edge of the pole hole and the hole wall of the pole hole along the radial direction of the pole hole greater than or equal to 1.5mm , can increase the flow path of external water vapor entering the inside of the battery case through the gap between the cover part and the cover plate body, thereby reducing the leakage rate (that is, the water vapor flowing from the outside of the pole hole into the pole hole within a unit time quantity), improve the stability of the battery.

Moreover, since the battery cover assembly provided by the present disclosure increases the effective sealing length between the pole and the cover body by increasing the radial dimension of the cover part of the pole, the above-mentioned method will not cause the pole to be in the axial direction. The increase in size will not lead to an increase in the axial size of the battery, nor will it interfere with the installation and arrangement of the battery cells.

It can be understood that the greater the distance between the cover portion away from the edge of the pole hole in the radial direction of the pole hole and the hole wall of the pole hole, that is, the longer the effective sealing length, the smaller the leakage rate, and the corresponding , the better the sealing effect on the pole hole. Therefore, according to the actual use requirements of the battery, the distance between the edge of the cover part away from the pole hole and the pole hole wall along the radial direction of the pole hole can be selected, as long as An effective sealing effect can be achieved when the distance between the covering portion away from the edge of the pole hole along the radial direction of the pole hole and the hole wall of the pole hole is greater than or equal to 1.5 mm.

Other features and advantages of the present disclosure will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the description, together with the following specific embodiments, are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the attached picture:

FIG. 1 is a cross-sectional view of a battery cover assembly provided in a first exemplary embodiment of the present disclosure;

Fig. 2 is an enlarged view of part A of Fig. 1;

3 is a cross-sectional view of a battery cover assembly provided in a second exemplary embodiment of the present disclosure;

Fig. 4 is a cross-sectional view of a battery cover assembly provided in a third exemplary embodiment of the present disclosure;

5 is a cross-sectional view of a battery cover assembly provided in a fourth exemplary embodiment of the present disclosure;

Fig. 6 is a perspective view of a battery provided in an exemplary embodiment of the present disclosure.

Description of reference signs: 1-battery cover assembly; 2-battery shell; 3-shell seat; 4-battery core; 10-cover body; 11-pole hole; 20-pole; -conductive column; 2100-column; 2101-annular flange; 211-conductive plate; 2111-step surface; 22-covering part;

Detailed ways

Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

In the present disclosure, unless otherwise stated, "up and down directions" refer to up and down in a normal use state of the battery, which can be specifically shown with reference to the direction of the drawing in FIG. 1 . "Far and near" means far and near from the corresponding structure. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

Referring to FIGS. 1-6 , according to a first aspect of the present disclosure, a battery cover assembly 1 is provided, including: a cover body 10 and a pole 20 , and a pole hole 11 is formed on the cover body 10 ; The pole includes an insertion portion 21 and a cover portion 22. The insertion portion 21 is inserted into the pole hole 11. The cover portion 22 protrudes from the cover body 10 along the axial direction of the pole hole 11. The cover portion 22 protrudes along the pole hole 11. Extend radially, so that the projection of the covering part 22 on the cover body 10 along the axial direction of the pole hole 11 is located in the cover body 10, thereby covering the pole hole 11, and the covering part 22 is along the radial direction of the pole hole 11 The distance L between the edge away from the pole hole 11 and the hole wall of the pole hole 11 is greater than or equal to 1.5 mm, so as to increase the effective sealing length between the pole and the cover plate body.

Through the above technical solution, the pole includes an insertion portion 21 and a cover portion 22, and the cover portion 22 extends along the radial direction of the pole hole 11, so that the projection of the cover portion 22 on the cover body 10 along the axial direction of the pole hole 11 Located in the cover plate body 10, and the distance L between the edge of the pole hole 11 away from the edge of the pole hole 11 and the hole wall of the pole hole 11 along the radial direction of the pole hole 11 is greater than or equal to 1.5 mm, which is comparable to the prior art In contrast, the covering part 22 of the present disclosure extends along the radial direction of the pole hole 11, by extending the size of the covering part 22 in the radial direction of the pole hole 11, and making the covering part 22 away from the pole along the radial direction of the pole hole 11 The distance L between the edge of the hole 11 and the hole wall of the pole hole 11 is greater than or equal to 1.5mm, which can increase the flow path for external water vapor to enter the interior of the battery case 2 through the gap between the cover part 22 and the cover body 10, Therefore, the leakage rate (that is, the amount of water vapor flowing from the outside of the pole hole 11 into the pole hole 11 within a unit time) is reduced, and the stability of the battery is improved. The covering part of the present disclosure extends radially along the pole hole, and by extending the radial dimension of the covering part, the flow path for external water vapor to enter the battery casing through the gap between the covering part and the cover plate body can be increased, thereby reducing the The leak rate improves the stability of the battery, and the above method will not increase the axial size of the pole, which is more convenient for the installation and arrangement of the battery body.

Moreover, since the battery cover assembly 1 provided in the present disclosure increases the effective sealing length between the pole and the cover body 10 by increasing the radial dimension of the cover portion 22 of the pole, the above method will not cause extreme The increase in the axial dimension of the column will not lead to an increase in the axial dimension of the battery, nor will it interfere with the installation arrangement of the battery cell 4 .

It can be understood that the greater the distance L between the cover portion 22 away from the edge of the pole hole 11 in the radial direction of the pole hole 11 and the hole wall of the pole hole 11, that is, the longer the effective sealing length, the greater the leakage rate. The smaller the size, the better the sealing effect on the pole hole 11. Therefore, according to the actual use requirements of the battery, the cover part 22 can be selected to be away from the edge of the pole hole 11 along the radial direction of the pole hole 11 and the pole hole. The distance between the hole walls of 11, as long as the distance L between the cover part 22 away from the edge of the pole hole 11 along the radial direction of the pole hole 11 and the hole wall of the pole hole 11 is greater than or equal to 1.5mm can be effective sealing effect.

The above-mentioned covering part 22 can cover the pole hole 11 from the inside of the cover body 10 (ie, the side of the cover body 10 close to the battery 4 ), or it can cover the pole hole 11 from the outside of the cover body 10 (ie, the cover body is away from the battery 4 ). side) to cover the pole hole 11. For example, in one embodiment provided by the present disclosure, as shown in FIG. 1 , FIG. 2 , FIG. 4 and FIG. 6 , the covering portion 22 may protrude downward from the cover plate body 10 along the axial direction of the pole hole 11 , The cover part 22 can be located inside the battery case 2 , and the cover part 22 is used for conductive connection with the tab 40 of the battery cell 4 inside the battery case 2 . In this embodiment, the covering part 22 is arranged inside the battery case 2 to cover the pole hole 11 from the inner side of the cover body 10, since the covering part 22 is also used for conductive connection with the tab 40 of the battery cell 4, and The radial dimension of the cover part 22 is longer, which is beneficial to increase the connection area between the tab 40 and the cover part 22 .

In another embodiment provided by the present disclosure, as shown in FIG. 3 and FIG. 5 , the covering part 22 can protrude upward from the cover plate body 10 along the axial direction of the pole hole 11, so that the covering part 22 can be located in the battery Outside the casing 2 , the insertion portion 21 is used for conductive connection with the tab 40 of the battery cell 4 inside the battery casing 2 . In this embodiment, the cover part 22 is arranged outside the battery case 2, which facilitates the installation and disassembly of the cover part 22 and the subsequent maintenance of the cover part 22, and, precisely because the cover part 22 protrudes from the cover body 10, it is also more convenient to connect the battery with external electrical equipment.

Here, it should be noted that, in the embodiment in which the cover part 22 is located inside the battery case 2, the cover part 22 may be electrically connected to the positive tab 40 of the battery cell 4 located in the battery case 2, or may be connected to the positive tab 40 located in the battery case 2. The negative tab 40 of the battery cell 4 inside 2 is electrically connected, and similarly, in the embodiment where the cover portion 22 is located outside the battery case 2, the insertion portion 21 can be electrically connected to the positive tab 40 of the battery cell 4 inside the casing, It can also be electrically connected to the negative tab 40 of the battery cell 4 located in the battery case 2 , which is not limited in the present disclosure.

Optionally, in an embodiment provided by the present disclosure, as shown in FIG. 4 and FIG. 5 , the insertion portion 21 may be columnar, and the columnar insertion portion 21 is inserted into the pole hole 11 .

Optionally, in another embodiment provided by the present disclosure, as shown in FIGS. From the outer peripheral surface of the conductive column 210 protrudes from the conductive column 210 along the radial direction of the conductive column 210, the conductive plate 211 can be integrally formed with the conductive column 210, or the conductive plate 211 can be connected to the conductive column 210 (as shown in Figure 1 and Figure 3 shown). The conductive plate 211 protrudes from the outer peripheral surface of the conductive post 210 to the conductive post 210 along the radial direction of the conductive post 210. That is to say, the cooperation between the conductive plate 211 and the conductive post 210 can increase the size of the insertion portion 21 along the axis of the post hole 11. The projected area on the cover plate body 10 in the direction provides a larger contact area for the electrical connection between the tab 40 of the battery cell 4 in the battery case 2 or the electrical connection between the external electrical equipment and the insertion part 21, which is more convenient for external power consumption. Connection of the device or tab 40 to the insertion part 21 .

Here, the connection of the conductive plate 211 to the conductive column 210 means that the conductive plate 211 and the conductive column 210 are two mutually independent parts, so that when the above-mentioned battery cover plate assembly 1 is assembled, the conductive column 210 can be removed from the One side of the cover body 10 is inserted into the pole hole 11 , and then the conductive plate 211 is connected to the conductive post 210 from the other side of the cover body 10 by riveting or welding.

In the embodiment where the conductive plate 211 is connected to the conductive column 210, as shown in FIGS. Flange 2101, a first through hole and a second through hole communicating with the first through hole are formed on the conductive plate 211, the aperture of the first through hole is smaller than the aperture of the second through hole, so that the first through hole and the second through hole A stepped surface 2111 is formed between the through holes, the cylinder 2100 is inserted into the first through hole, and the annular flange 2101 is located in the second through hole and connected to the stepped surface 2111 . When connecting the conductive plate 211 and the conductive post 210, the post can be inserted into the first through hole first, and the annular flange is abutted on the stepped surface 2111. The outer edge of the flange is welded to the stepped surface 2111 to realize the connection between the annular flange and the conductive plate 211 . Alternatively, the connection between the conductive plate 211 and the conductive post 210 can also be realized through a riveting process. In a word, the present disclosure does not limit the above connection method, as long as the connection between the conductive post 210 and the conductive plate 211 can be realized.

In order to facilitate the connection of the conductive column 210 with the external electrical equipment or the tab 40 in the battery casing 2, when the column 2100 is inserted into the first through hole, the annular flange 2101 is located in the second through hole and connected to the stepped surface 2111 , the outer surface of the annular flange may be flush with the outer surface of the conductive plate 211 .

Since the distance L between the edge of the pole hole 11 and the wall of the pole hole 11 away from the pole hole 11 in the radial direction of the cover portion 22 is larger, the effective sealing length is longer, and the cover portion 22 along the pole hole 11 The distance L between the edge radially away from the pole hole 11 and the hole wall of the pole hole 11 is related to the radial dimension of the pole hole 11, and the radial dimension of the pole hole 11 is related to the insertion part 21 in the pole hole. The maximum dimension d in the radial direction of 11 is related, therefore, optionally, the maximum dimension d of the insertion portion 21 in the radial direction of the pole hole 11 may range from 0.8 mm to 1.5 mm. When the maximum dimension d of the insertion part 21 in the radial direction of the pole hole 11 ranges from 0.8 mm to 1.5 mm, it can meet the requirements of the battery's overcurrent capability without causing the insertion part 21 to cause the radial direction of the pole hole 11. The increase in size leads to the problem that the distance L between the edge of the pole hole 11 and the hole wall of the pole hole 11 away from the cover portion 22 along the radial direction of the pole hole 11 decreases, so as to increase the cover portion 22 as much as possible Along the radial direction of the pole hole 11, the distance L between the edge of the pole hole 11 and the hole wall of the pole hole 11 is far away, so as to achieve the effect of reducing the leakage rate.

It can be understood that, as shown in FIG. 4 and FIG. 5 , for the embodiment in which the insertion portion 21 is columnar, the maximum dimension d of the insertion portion 21 in the radial direction of the pole hole 11 refers to the columnar insertion portion 21 The outer diameter of; for the case where the insertion portion 21 includes a conductive post 210 and a conductive plate 211, the maximum dimension d of the insertion portion 21 in the radial direction of the pole hole 11 refers to the diameter of the conductive plate 211 in the radial direction of the pole hole 11 the maximum size of .

Optionally, as shown in FIGS. 1-5 , the battery cover assembly 1 further includes an insulator 30 installed on the pole and clamped between the cover portion 22 and the cover body 10 . On the one hand, the insulator 30 installed between the cover part 22 and the cover body 10 can play a sealing role, thereby improving the sealing effect of the cover part 22 on the cover body 10; The part 22 and the cover body 10 play the role of insulation. In this way, there is no conductive connection relationship between the cover part 22 and the cover body 10, and the cover part 22 and the cover body 10 can be respectively connected with the electrical connection in the battery case 2. The positive tab 40 and the negative tab 40 of the core 4 are connected, that is, the cover part 22 and the cover body 10 may have different electrical properties.

In the present disclosure, the insulating member 30 can be selected from PP glue (polypropylene), or insulating materials including polystyrene (PS), polyethylene (PE), polyester (PET), polyvinyl chloride (PVC), One of polyimide (PI), acrylonitrile butadiene styrene plastic (ABS), polycarbonate (PC), polyamide (PA) and ceramics.

Optionally, the thickness of the insulating member 30 may be between 0.1mm-0.2mm. In addition, the insulator 30 can be hermetically connected to the cover portion 22 and the cover body 10 through a thermocompression sealing process.

Optionally, the outer edge of the insulator 30 may protrude beyond the outer edge of the cover portion 22 in the radial direction of the pole hole 11. As shown in FIGS. The spacing x of the outer edge in the radial direction of the pole hole 11 is 1mm-1.5mm; or, as shown in FIGS. or be flush with the outer edge of the insulator 30, and the distance x between the outer edge of the covering portion 22 and the outer edge of the cover body 10 in the radial direction of the pole hole 11 is 1mm-1.5mm. That is to say, for the case where the outer edge of the insulating member 30 protrudes from the cover portion 22, the distance between the outer edge of the insulating member 30 and the outer edge of the cover body 10 is 1mm-1.5mm. In the case that the outer edge of the cover does not protrude from the covering part 22, the distance between the outer edge of the covering part 22 and the outer edge of the cover body 10 is 1mm-1.5mm. When the seat 3 is welded, the generated heat radiation will affect the insulating member 30 , melt the insulating member 30 , and affect the insulating and sealing effect of the insulating member 30 . Moreover, the distance x between the outer edge of the insulating member 30 or the cover portion 22 and the outer edge of the cover plate in the radial direction of the pole hole 11 is controlled at 1mm-1.5mm, which can avoid heat radiation to the insulating member 30 during the welding process. The effect is that the radial dimension of the covering part 22 can be increased, thereby increasing the effective sealing length, reducing the leakage rate, and improving the stability of the battery.

According to the second aspect of the present disclosure, as shown in Fig. 1, Fig. 2-Fig. The board body 10 is covered on the shell base 3 .

According to a third aspect of the present disclosure, a battery is provided, including the battery casing 2 as described above and the battery cell 4 disposed in the battery casing 2 .

Optionally, one of the positive tab 40 and the negative tab 40 of the cell 4 is connected to the pole, and the other of the positive tab 40 and the negative tab 40 of the cell 4 is connected to the case base 3 or the cover body 10 connect.

The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure. These simple modifications all belong to the protection scope of the present disclosure.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner if there is no contradiction. The combination method will not be described separately.

In addition, various implementations of the present disclosure can be combined arbitrarily, as long as they do not violate the idea of the present disclosure, they should also be regarded as the content disclosed in the present disclosure.

Claims

A battery cover assembly (1), characterized in that it comprises:

a cover plate body (10), and pole holes (11) are formed on the cover plate body (10); and

The pole (20) includes an insertion part (21) and a cover part (22), the insertion part (21) is inserted into the pole hole (11), and the cover part (22) is inserted along the pole The axial direction of the hole (11) protrudes from the cover plate body (10), and the covering part (22) extends along the radial direction of the pole hole (11), so that the covering part (22) extends along the The axial projection of the pole hole (11) on the cover body (10) is located inside the cover body (10), and the covering part (22) is along the pole hole (11) The distance between the edge of the pole hole (11) radially away from the hole wall of the pole hole (11) is greater than or equal to 1.5 mm.
The battery cover plate assembly (1) according to claim 1, characterized in that, the cover portion (22) protrudes downward from the cover plate body (10) along the axial direction of the pole hole (11) ), so that the cover part (22) can be located inside the battery case (2), and the cover part (22) is used to communicate with the tab (40) of the cell (4) in the battery case (2) ) conductive connection.
The battery cover plate assembly (1) according to claim 1, characterized in that, the cover portion (22) protrudes upward from the cover plate body (10) along the axial direction of the pole hole (11) so that the cover part (22) can be located outside the battery casing (2), and the insertion part (21) is used to connect with the tab (40) of the battery cell (4) in the battery casing (2) Conductive connection.
The battery cover assembly (1) according to claim 2 or 3, characterized in that the tab (40) is a positive tab of the battery cell (4).
The battery cover assembly (1) according to claim 2 or 3, characterized in that the tab (40) is a negative tab of the battery cell (4).
The battery cover assembly (1) according to any one of claims 1-5, characterized in that the insertion part (21) comprises a conductive post (210) and a conductive plate (211), the conductive post ( 210) is formed on the covering part (22), and the conductive plate (211) protrudes from the outer peripheral surface of the conductive column (210) along the radial direction of the conductive column (210) out of the conductive column ( 210).
The battery cover plate assembly (1) according to claim 6, characterized in that, the conductive plate (211) is integrally formed with the conductive column (210).
The battery cover plate assembly (1) according to claim 6, characterized in that, the conductive plate (211) is connected to the conductive column (210).
The battery cover assembly (1) according to any one of claims 6-8, characterized in that, the conductive post (210) is inserted into the pole post hole (11).
The battery cover plate assembly (1) according to claim 6, characterized in that, the conductive post (210) comprises a post body (2100) and is formed on the post body (2100) away from the cover part (22) An annular flange (2101) at one end of the conductive plate (211), a first through hole and a second through hole communicating with the first through hole are formed on the conductive plate (211), and the diameter of the first through hole is smaller than the first through hole. The diameter of the second through hole, so that a stepped surface (2111) is formed between the first through hole and the second through hole, the column (2100) is inserted into the first through hole, and the ring A shaped flange (2101) is located in the second through hole and connected to the stepped surface (2111).
The battery cover plate assembly (1) according to claim 10, characterized in that, the outer surface of the annular flange (2101) is flush with the outer surface of the conductive plate (211).
The battery cover assembly (1) according to claim 10 or 11, characterized in that, the annular flange (2101) abuts on the stepped surface (2111).
The battery cover plate assembly (1) according to any one of claims 1-12, characterized in that, the range of the maximum dimension of the insertion part (21) in the radial direction of the pole hole (11) is 0.8mm-1.5mm.
The battery cover assembly (1) according to any one of claims 1-12, characterized in that, the battery cover assembly (1) further comprises an insulating member (30), and the insulating member (30) is installed On the pole (20) and clamped between the cover (22) and the cover body (10).
The battery cover plate assembly (1) according to claim 14, characterized in that, the thickness of the insulating member (30) ranges from 0.1 mm to 0.2 mm.
The battery cover plate assembly (1) according to claim 14 or 15, characterized in that the insulating member (30) is respectively in sealing connection with the cover portion (22) and the cover plate body (10).
The battery cover assembly (1) according to any one of claims 14-16, characterized in that, the outer edge of the insulator (30) protrudes radially from the pole hole (11) The distance between the outer edge of the covering part (22), the outer edge of the insulating member (30) and the outer edge of the cover body (10) in the radial direction of the pole hole (11) is 1mm- 1.5mm; or,

The outer edge of the covering part (22) protrudes from the outer edge of the insulating part (30) along the radial direction of the pole hole (11), or is flush with the outer edge of the insulating part (30) , the distance between the outer edge of the cover part (22) and the outer edge of the cover body (10) in the radial direction of the pole hole (11) is 1mm-1.5mm.
A battery case (2), comprising a case seat (3) and the battery cover assembly (1) according to any one of claims 1-17, the cover body of the battery cover assembly (1) ( 10) The cover is arranged on the shell base (3).
A battery (100), characterized in that it comprises the battery casing (2) according to claim 18 and a battery cell (4) installed in the battery casing (2).