Battery cell cover plate and battery cell

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cell cover plate and a battery cell. The battery cell cover plate comprises: a pole comprising a first pole body part and a second pole body part; the riveting piece is riveted with the pole column, and part of the circumferential side wall of the second column body part expands outwards to form a material expansion part; the section, perpendicular to the axial direction, of the first cylinder part is of a strip-shaped structure, K is the maximum length size of the first cylinder part, M is the maximum width size of the first cylinder part, and K / M is larger than 1 and smaller than or equal to 2; and the maximum size of the second cylinder part in the length direction of the cover plate main body is D, D is more than or equal to 3mm and less than M, and D / M is more than or equal to 35% and less than or equal to 65%. According to the utility model, the size proportion of the length and the width of the first cylinder part and the size relation between the first cylinder part and the second cylinder part are limited, so that the riveting strength is ensured while the first cylinder part can effectively increase the overflowing capacity, and the structural strength of the cover plate main body is not influenced; and the structural strength of the battery cell cover plate meets the battery cell use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a battery. Background Art

[0002] As lithium-ion battery technology matures, it's widely used as a power battery in electric vehicles and energy storage applications, leading to increasing demands for performance and safety. The lithium-ion battery cover is a key component in lithium-ion batteries, welding to the battery case to form a sealed cavity, extracting the positive and negative electrodes, and serving as an assembly carrier.

[0003] At present, with the continuous improvement of the demand for fast charging and overcurrent capacity of batteries, the structure of the double cylindrical pole can no longer meet the fast charging requirements of 4C, 5C or even 6C. Therefore, it is necessary to increase the surface area of ​​the pole to increase the overcurrent capacity. Although increasing the rod diameter of the circular pole can increase the overcurrent, for example, in blade batteries, the thickness of the battery is relatively small, so that increasing the rod diameter of the circular pole is subject to the influence of the thickness of the entire battery, and the effect of increasing the area is not obvious, and the cost is relatively high. Increasing the rod diameter of the pole will correspondingly increase the opening size of the through hole on the top cover for installing the pole, thereby reducing the structural strength of the top cover and failing to ensure the safety of the battery cell. In addition, the existing pole is fixed by riveting with the rivet block. During the use of the battery cell, it will be subjected to the force of vibration and impact, which will cause the rivet block to be subjected to corresponding thrust and torsion. Insufficient riveting strength can easily lead to insulation and sealing failure of the cover plate. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cell cover and a battery cell to solve the problem that the existing battery cell cover cannot ensure the structural strength of the top cover plate by increasing the rod diameter of the circular pole to improve the current capacity, thereby affecting the safety performance of the battery cell.

[0005] A first aspect of the present invention provides a cell cover, wherein the cell cover comprises:

[0006] The cover plate body is provided with a mounting hole;

[0007] The pole comprises a first column portion and a second column portion sequentially arranged along the axial direction of the pole, the first column portion being passed through the mounting hole, and the second column portion being arranged on a side of the cover plate body facing the outside of the battery cell;

[0008] A rivet, riveted to the pole, wherein a portion of the circumferential side wall of the second column portion expands outward to form a bulging portion riveted to the rivet;

[0009] The cross section of the first column portion perpendicular to the axial direction of the pole is formed into a strip structure, K is the maximum dimension of the first column portion in the length direction of the cover plate body, in mm; M is the maximum dimension of the first column portion in the width direction of the cover plate body, in mm; 1<K / M≤2;

[0010] Before riveting, the maximum dimension of the second column portion in the length direction of the cover plate main body is D, in mm; 3mm≤D<M, 35%≤D / M≤65%.

[0011] Preferably, the strip structure extends along the length direction of the cover plate body.

[0012] Preferably, a shape of a cross section of the first column portion perpendicular to the axial direction of the pole is different from a shape of a cross section of the second column portion perpendicular to the axial direction of the pole.

[0013] Preferably, the height dimension of the bulging portion in the thickness direction of the cover plate body is h, the height dimension of the second column portion in the thickness direction of the cover plate body is H, and 40%≤h / H≤60%.

[0014] Preferably, the maximum dimension of the bulging portion in the length direction of the cover plate body is D1, and 0.5 mm ≤ D1 - D ≤ 2 mm.

[0015] Preferably, the pole further comprises a plate portion provided at an end of the first column portion away from the second column portion, and the plate portion is provided on a side of the cover plate body facing the interior of the battery cell.

[0016] Preferably, it also includes:

[0017] The first insulating member is sandwiched between the cover plate body and the rivet member. Part of the first insulating member is formed into an annular structure sleeved on the outside of the rivet member, and the axis of the annular structure extends along the axial direction of the pole.

[0018] Preferably, it also includes:

[0019] The second insulating member is arranged on a side of the cover plate body facing the interior of the battery cell, and a portion of the second insulating member is sandwiched between the cover plate body and the plate body.

[0020] Preferably, it also includes:

[0021] The sealing member is formed into an annular structure sleeved on the outside of the first column portion, the axis of the annular structure extends along the axial direction of the pole, and part of the sealing member is sandwiched between the cover plate body and the plate portion.

[0022] A second aspect of the present invention provides a battery cell, comprising the battery cell cover plate described in any of the above technical solutions.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] In the battery cell cover of the present invention, the cross-section of the first column portion perpendicular to the axial direction of the pole is formed into a strip structure, K is the maximum dimension of the first column portion in the length direction of the cover plate body, M is the maximum dimension of the first column portion in the width direction of the cover plate body, 1<K / M≤2, and the maximum dimension of the second column portion in the length direction of the cover plate body before riveting is D, 3mm≤D<M, 35%≤D / M≤65%. The dimensional ratio of the length and width of the first column portion, as well as the dimensional relationship between the first column portion and the second column portion are limited in this way, ensuring that the first column portion can effectively increase the flow capacity while ensuring the riveting strength, and the structural strength of the cover plate body is not affected, ensuring that the structural strength of the battery cell cover plate meets the use requirements of the battery cell, and the battery cell meets the fast charging requirements while also having reliable safety performance.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of a cell cover provided in an embodiment of the present utility model;

[0028] Figure 2 A schematic structural diagram of a cell cover provided by an embodiment of the present utility model from another perspective;

[0029] Figure 3 For the Figure 2 Cross-section taken at AA in the middle;

[0030] Figure 4 For the Figure 2 Cross-section taken at CC;

[0031] Figure 5 A schematic diagram of the structure of the battery cover before the pole is riveted provided by an embodiment of the present invention;

[0032] Figure 6A schematic structural diagram of a battery cell cover plate provided by an embodiment of the present invention before the pole is riveted from another perspective;

[0033] Figure 7 A schematic structural diagram of a battery cell cover plate provided by an embodiment of the present invention before the pole is riveted from another perspective;

[0034] Figure 8 A schematic diagram of the structure of the battery cover after the poles are riveted provided by an embodiment of the utility model;

[0035] Figure 9 A schematic structural diagram of the battery cover provided by an embodiment of the present invention after the poles are riveted from another perspective;

[0036] Figure 10 This is a structural schematic diagram of the battery cell cover provided by an embodiment of the present invention after the poles are riveted from another perspective.

[0037] Icons: 10- rivet; 20- cover body; 21- mounting hole; 22- liquid injection hole; 30- pole; 31- first column part; 32- second column part; 321- material expansion part; 33- plate part; 40- sealing part; 50- first insulating part; 60- second insulating part. DETAILED DESCRIPTION

[0038] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0039] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0040] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0041] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0042] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0043] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0044] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0045] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0046] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0047] According to a first aspect of the present invention, a cell cover is provided, which specifically includes a cover body 20 , a pole 30 and a rivet 10 .

[0048] Hereinafter, the specific structure of the cell cover plate as described above according to this embodiment will be described.

[0049] In this embodiment, if Figures 1 to 4 As shown, the cover body 20 is formed into a rectangular plate structure, as shown in FIG. Figure 2 and Figure 3 As shown, the cover body 20 is arranged perpendicularly in each of its length, width, and thickness directions. Mounting holes 21 and injection holes 22 are provided on the cover body 20. Both mounting holes 21 and injection holes 22 are through-hole structures that extend through the cover body 20. The mounting holes 21 are used to mount the poles 30, and the injection holes 22 are used to inject electrolyte and evacuate the inside of the cell from the outside of the cell after the cell cover and cell housing are assembled. The number of mounting holes 21 corresponds to the number of poles 30.

[0050] In this embodiment, if Figures 1 to 10 As shown, the pole 30 includes a first column portion 31 and a second column portion 32 arranged in sequence along its axial direction. The first column portion 31 and the second column portion 32 are both formed into a columnar structure, which has an axis extending along the thickness direction of the cover body 20. The first column portion 31 is passed through the mounting hole 21, so that the hole wall of the mounting hole 21 is surrounded by the circumferential side wall of the first column portion 31, and the second column portion 32 is arranged on the side of the cover body 20 facing the outside of the battery cell, that is, after the pole 30 is assembled with the cover body 20, the second column portion 32 passes through the mounting hole 21 for connection with components such as the bus bar outside the battery cell.

[0051] In a preferred embodiment, Figures 1 to 3 As shown, a plurality of poles 30 are provided, and the plurality of poles 30 are spaced apart along the length direction of the cover body 20 .

[0052] In this embodiment, if Figures 1 to 4 As shown, the rivet 10 is formed into a block-shaped structure. A through-hole is formed on the rivet 10 for the second column portion 32 to penetrate. In order to achieve riveting with the pole 30, the number of through-holes on the rivet 10 is the same as the number of the poles 30. Specifically, a portion of the circumferential sidewall of the second column portion 32 expands outward to form a bulging portion 321 that is riveted to the rivet 10. The bulging portion 321 is arranged on the side of the second column portion 32 away from the first column portion 31 in the axial direction of the pole 30. Preferably, the through-hole on the rivet 10 is a stepped hole structure to accommodate the outwardly expanding bulging portion 321, so that the bulging portion 321 can be snapped onto the step of the stepped hole, thereby achieving fixation of the pole 30 relative to the cover plate body 20.

[0053] In this embodiment, if Figures 1 to 10 As shown, the cross section of the first column portion 31 perpendicular to the axial direction of the pole 30 is formed into a strip structure, that is, the cross section of the first column portion 31 is a strip structure. The strip structure can be an ellipse, a runway shape with semicircular ends and a rectangle in the middle, or a polygon. Preferably, the strip structure extends along the length direction of the cover body 20, that is, the length direction of the strip structure is the same as the length direction of the cover body 20. In this way, compared with the cylindrical pole 30 in the prior art, the current capacity can be increased without expanding the size of the mounting hole 21 in the width direction of the cover body 20, thereby reducing the impact on the structural strength of the cover body 20.

[0054] Furthermore, in this embodiment, Figure 6 As shown, K is the maximum dimension of the first column portion 31 along the length of the cover plate body 20, in mm; M is the maximum dimension of the first column portion 31 along the width of the cover plate body 20, in mm; 1<K / M≤2; the maximum dimension of the second column portion 32 along the length of the cover plate body 20 before riveting is D, in mm; 3mm≤D<M. This defines the length-to-width ratio of the first column portion 31 and the dimensional relationship between the first and second column portions 31, 32. This ensures that the first column portion 31 effectively increases the current flow capacity while maintaining riveting strength. Without compromising the structural strength of the cover plate body 20, this further enhances the current flow capacity of the cell cover and the connection reliability of the rivet 10, thereby ensuring the insulation and sealing performance of the cell. If D is less than 3mm, riveting becomes more difficult.

[0055] After the cell cover is assembled into a cell, multiple cells will be assembled in series and / or in parallel into a battery pack, wherein an aluminum sheet will be welded on the surface of the rivet 10 after the multiple cells are connected; the cell will be subjected to vibration and impact during actual use, causing the rivet 10 to be subjected to corresponding thrust and torsion. The rivet 10 needs to have a certain load-bearing capacity so that it can be reliably connected to the pole 30 to ensure the strength requirements of the rivet 10 and the pole 30.

[0056] In this embodiment, if Figure 6 As shown, 35%≤D / M≤65%. In this way, while achieving the improvement of the overcurrent capacity, the riveting strength between the rivet 10 and the pole 30 is guaranteed, so that the rivet 10 can withstand the force applied in a certain direction along the axial direction of the pole 30, thereby avoiding the rivet 10 from falling off when the battery cell is subjected to vibration, impact, etc.

[0057] The following is an investigation into whether the limiting conditions of 1<K / M≤2 and 35%≤D / M≤65% in this application can guarantee the load-bearing capacity of the rivet 10 to meet the insulation and sealing performance requirements of the battery cell. The battery cover plate after assembly of the poles 30 with different K, M, and D sizes is subjected to an ultimate thrust test and a fatigue test of the rivet 10. When the rivet 10 can withstand a thrust of greater than 2000N applied to the surface of the rivet 10 facing away from the cover plate body 20 along the axial direction of the pole 30, it is considered to have passed the ultimate thrust test. When the rivet 10 can withstand a thrust of 1000N applied 50,000 times along the axial direction of the pole 30 to the surface of the rivet 10 facing away from the cover plate body 20, it is considered to have passed the fatigue test and met the battery cell performance requirements. The test results are shown in Tables 1 and 2.

[0058] Table 1

[0059]

[0060]

[0061] Table 2

[0062]

[0063]

[0064] As can be seen from Table 1, Examples 1 to 16 all satisfy the defined conditions of 1 < K / M ≤ 2 and 35% ≤ D / M ≤ 65%, the limit stress test and fatigue test of the rivet 10 on the assembled cell cover plate all pass, and the use requirements of the cell cover plate are met. As can be seen from Table 2, Comparative Examples 1 to 16, the parameter D / M is not within the range of 35% to 65%, resulting in a limit thrust value less than 2000N or a fatigue test failure, and the rivet 10 is easily detached from the cell cover plate, thereby easily causing cell insulation and sealing failure.

[0065] In the present embodiment, as shown in Figures 1 to 10 , the shape of the cross section of the first cylindrical portion 31 perpendicular to the axial direction of the pole 30 is different from the shape of the cross section of the second cylindrical portion 32 perpendicular to the axial direction of the pole 30. Specifically, the second cylindrical portion 32 is circular in cross section perpendicular to the axial direction of the pole 30, which ensures that the expansion portion 321 uniformly expands in all directions during stamping of the second cylindrical portion 32, so that the edge of the cross section of the expansion portion 321 perpendicular to the axial direction of the pole 30 is circular, thereby ensuring reliable connection of the rivet 10 and the pole 30, and avoiding the rivet 10 from being detached from the cell cover plate.

[0066] In the present embodiment, as shown in Figure 10 , the height dimension of the expansion portion 321 in the thickness direction of the cover plate body 20 is h, and the height dimension of the second cylindrical portion 32 in the thickness direction of the cover plate body 20 is H, 40% ≤ h / H ≤ 60%, thereby ensuring the riveting strength of the pole 30 and the rivet 10.

[0067] Further, in the present embodiment, as shown in Figure 6 and Figure 9 , the maximum dimension of the expansion portion 321 in the length direction of the cover plate body 20 is D1, 0.5mm ≤ D1-D ≤ 2mm, thereby further ensuring the riveting strength of the pole 30 and the rivet 10.

[0068] In the present embodiment, as shown in Figure 1 and Figure 10 , the pole 30 further includes a plate portion 33 arranged at one end of the first cylindrical portion 31 away from the second cylindrical portion 32, i.e., the second cylindrical portion 32, the first cylindrical portion 31 and the plate portion 33 are sequentially arranged along the axial direction of the pole 30, the plate portion 33 is arranged on the side of the cover plate body 20 facing the inside of the cell, for connecting the pole group inside the cell, and the plate portion 33 is formed as a plate structure parallel to the cover plate body 20, for example, a polygonal plate structure, so as to facilitate connection of the tabs on the pole group with the plate portion 33.

[0069] In the present embodiment, as shown in Figures 1 to 4As shown, the cell cover further includes a first insulating member 50 and a second insulating member 60. The first insulating member 50 and the second insulating member 60 can be formed of insulating materials such as PP (polypropylene), PPS (polyphenylene sulfide) or LCP (liquid crystal polymer) to play a role in insulation protection.

[0070] Specifically, the first insulating member 50 is sandwiched between the cover body 20 and the rivet 10 to separate the cover body 20 from the rivet 10. The first insulating member 50 is formed of an insulating material, thereby providing insulation protection for the cover body 20 and preventing the risk of short circuit caused by overlapping of the cover body 20 with the rivet 10 or the terminal 30. Preferably, a portion of the first insulating member 50 is formed into an annular structure that is sleeved on the outside of the rivet 10 to surround the circumferential side wall of the rivet 10. The axis of the annular first insulating member 50 extends along the axial direction of the terminal 30, thereby improving the reliability of the insulation protection for the cover body 20.

[0071] More specifically, the second insulating member 60 is disposed on the side of the cover body 20 facing the interior of the cell to prevent contact between the electrode group and the electrode post 30 disposed within the cell and the cover body 20, thereby further providing insulation protection for the cover body 20. Preferably, a portion of the second insulating member 60 is sandwiched between the cover body 20 and the plate portion 33. This prevents overlapping contact between the cover body 20 and the plate portion 33 of the electrode post 30, which could cause a short circuit, thereby enhancing the insulation protection provided by the second insulating member 60 to the cover body 20.

[0072] In addition, in this embodiment, Figure 3 and Figure 4 As shown, the cell cover also includes a seal 40, which can be an elastic fluororubber sealing ring. The seal 40 is formed into an annular structure that is sleeved on the outside of the first column portion 31. The axis of the annular seal 40 extends along the axial direction of the pole 30 to achieve complete circumferential sealing of the pole 30 by the seal 40, wherein part of the seal 40 is clamped between the cover body 20 and the plate portion 33. In this way, after the pole 30 is riveted to the rivet 10, the seal 40 is compressed to a certain extent, thereby ensuring the sealing performance of the cell cover.

[0073] According to the electric core cover plate provided by the utility model, the cross section of the first column body part is perpendicular to the pole column axial direction and forms a strip structure, K is the maximum size of the first column body part in the length direction of the cover plate main body, M is the maximum size of the first column body part in the width direction of the cover plate main body, 1 < K / M < 2, the maximum size of the second column body part in the length direction of the cover plate main body before riveting is D, 3mm < D < M, 35% < D / M < 65%, the size ratio of the length and the width of the first column body part and the size relationship between the first column body part and the second column body part are limited, the riveting strength is guaranteed while the first column body part can effectively increase the flow capacity, the structure strength of the cover plate main body is not affected, and the structure strength of the electric core cover plate meets the use requirement of the electric core.

[0074] According to the electric core provided by the utility model, the electric core cover plate is used, the electric core meets the fast charging requirement and also has reliable safety performance.

[0075] Finally, it should be noted that: the above-described embodiments, only for the specific embodiments of the present application, to illustrate the technical solutions of the present application, rather than limit it, the protection scope of the present application is not limited to this, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand: any familiar with the technical field of the technical personnel in the technical range disclosed by the present application, it still can be modified or easily thought of changes to the technical solutions recorded in the foregoing examples, or equivalent replacement to part of the technical features, and these modifications, changes or replacement, do not make the corresponding technical solutions of the essence of the present application deviate from the spirit and scope of the technical solutions of the embodiments of the present application, all should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be the protection scope of the claims.

Claims

1. A battery cover, characterized in that: The battery cover plate includes: The cover plate body is provided with a mounting hole; The pole comprises a first column portion and a second column portion sequentially arranged along the axial direction of the pole, the first column portion being passed through the mounting hole, and the second column portion being arranged on a side of the cover plate body facing the outside of the battery cell; A rivet, riveted to the pole, wherein a portion of the circumferential side wall of the second column portion expands outward to form a bulging portion riveted to the rivet; The cross section of the first column portion perpendicular to the axial direction of the pole is formed into a strip structure, K is the maximum dimension of the first column portion in the length direction of the cover plate body, in mm; M is the maximum dimension of the first column portion in the width direction of the cover plate body, in mm; 1<K / M≤2; Before riveting, the maximum dimension of the second column portion in the length direction of the cover plate main body is D, in mm; 3mm≤D<M, 35%≤D / M≤65%.

2. The cell cover according to claim 1, characterized in that: The strip structure extends along the length direction of the cover plate body.

3. The cell cover according to claim 1, wherein: A shape of a cross section of the first column portion perpendicular to the axial direction of the pole is different from a shape of a cross section of the second column portion perpendicular to the axial direction of the pole.

4. The cell cover according to claim 1, wherein: The height dimension of the rising portion in the thickness direction of the cover plate body is h, the height dimension of the second column portion in the thickness direction of the cover plate body is H, and 40%≤h / H≤60%.

5. The battery cell cover according to claim 1, characterized in that: The maximum dimension of the bulging portion in the length direction of the cover plate body is D1, 0.5 mm ≤ D1 - D ≤ 2 mm.

6. The cell cover according to claim 1, characterized in that: The pole further includes a plate portion provided at one end of the first column portion away from the second column portion, and the plate portion is provided on a side of the cover plate body facing the interior of the battery cell.

7. The battery cell cover according to claim 1, characterized in that: Also includes: The first insulating member is sandwiched between the cover plate body and the rivet member. Part of the first insulating member is formed into an annular structure sleeved on the outside of the rivet member, and the axis of the annular structure extends along the axial direction of the pole.

8. The battery cell cover according to claim 6, characterized in that: Also includes: The second insulating member is arranged on a side of the cover plate body facing the interior of the battery cell, and a portion of the second insulating member is sandwiched between the cover plate body and the plate body.

9. The battery cell cover according to claim 6, characterized in that: Also includes: The sealing member is formed into an annular structure sleeved on the outside of the first column portion, the axis of the annular structure extends along the axial direction of the pole, and part of the sealing member is sandwiched between the cover plate body and the plate portion.

10. A battery cell, characterized in that: The battery cell cover comprises the battery cell cover according to any one of claims 1 to 9.

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