Cover plate assembly, battery monomer and electric equipment

Abstract

The embodiment of the utility model provides a cover plate assembly, a battery monomer and electric equipment. The cover plate assembly comprises an insulating part and a cover plate, wherein the insulating part comprises a first surface and a second surface which are oppositely arranged along a first direction, the first surface is arranged close to the pole core, and the cover plate is connected to the second surface; the insulating part is provided with a first lead-out hole penetrating through the insulating part along the first direction; the first surface is provided with a tab guide part which inclines towards the second surface and extends to the first lead-out hole, and the tab guide part is used for guiding a tab to the first lead-out hole. In the cover plate assembly provided by the embodiment of the invention, the structure of the insulating part is simple, the bending angle of the tab is reduced, the height space of the battery monomer shell occupied by the insulating part is also reduced, and the cover plate assembly adapts to the current development trend of high safety performance and high volume energy density of the battery monomer.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a cover plate assembly, a battery cell, and an electrical device. Background Art

[0002] In a battery cell, the tab is led out from the electrode core and connected to the cover plate. An insulating member is also provided between the cover plate and the electrode core to prevent the tab from contacting the electrode core and causing a battery short circuit.

[0003] In the related art, the insulating member is provided with a top insulating plate for separating the electrode core from the cover plate. The tab can pass through the top insulating plate and be connected to the terminal post. In the case of only providing the top insulating plate, the bending angle of the tab is too large, which affects the safety performance of the battery cell; adding a side insulating plate can separate the electrode core from the housing and at the same time reduce the bending angle of the tab, but adding a side insulating plate will occupy the height space of the insulating member in the battery cell housing and does not adapt to the current development trend of high volumetric energy density. Utility Model Content

[0004] This application aims to provide a cover plate assembly, a battery cell, and an electrical device to solve the problems that the insulating plate in the existing cover plate assembly is not conducive to the safety performance of the battery cell and does not adapt to the trend of high volumetric energy density.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a cover plate assembly, including: an insulating member and a cover plate; wherein,

[0007] The insulating member includes a first surface and a second surface disposed away from each other in a first direction. The first surface is close to the electrode core, and the cover plate is connected to the second surface;

[0008] The insulating member is provided with a first lead-out hole penetrating the insulating member in the first direction;

[0009] The first surface is provided with an ear tab guiding portion that inclines towards the second surface and extends to the first lead-out hole. The ear tab guiding portion is used to guide the ear tab to the first lead-out hole.

[0010] Optionally, the included angle between the ear tab guiding portion and the first surface is α, satisfying: 20° ≤ α ≤ 45°.

[0011] Optionally, the number of the ear tab guiding portions on the first surface is two. The two ear tab guiding portions are symmetrically disposed on both sides of the first lead-out hole along a second direction, and the second direction intersects with the first direction.

[0012] Optionally, the cover plate assembly further includes a tab lead-out plate, the tab is connected to the tab lead-out plate, and passes through the first lead-out hole together with the tab lead-out plate.

[0013] Optionally, the cover plate assembly further includes a pole, one end of which protrudes from the cover plate, and the other end of which passes through the cover plate and the insulating member and is connected to the pole lug lead-out piece.

[0014] Optionally, the pole lug lead-out piece includes a pole lug connection portion and a pole column connection portion arranged along a third direction, the pole lug connection portion passes through the first lead-out hole, and the pole column connection portion is connected to the first surface, wherein the pole lug is connected to the pole lug connection portion, the pole is connected to the pole column connection portion, and the third direction intersects with the first direction.

[0015] Optionally, the first surface is provided with a receiving groove, the receiving groove is opposite to the pole connecting portion along the first direction, and the pole connecting portion is at least partially received in the receiving groove.

[0016] Optionally, a buckle is provided on the first surface, the buckle protrudes from the first surface, and the tab connecting portion is buckled to the buckle.

[0017] Optionally, the number of the buckles is two, and the two buckles are arranged on both sides of the first lead-out hole along the third direction.

[0018] Optionally, the cover plate is provided with a second lead-out hole, and the cover plate assembly also includes a cover cap, which is connected to the side of the cover plate away from the insulating member and is enclosed with the cover plate to form a first accommodating cavity, and the pole ear passes through the first lead-out hole and the second lead-out hole and is at least partially accommodated in the first accommodating cavity.

[0019] In the second aspect, the present application also discloses a battery cell, comprising: a shell, a pole core and a cover assembly as described above, wherein the shell comprises a second accommodating cavity having an opening, the pole core is arranged in the second accommodating cavity, and the cover assembly is connected to the pole core and blocks the opening; wherein the pole ear comprises two ends arranged in opposite directions, one end of the pole ear is connected to the pole core, and the other end is accommodated in the cover assembly.

[0020] In a third aspect, the present application also discloses an electrical device, comprising the battery cell as described above.

[0021] In the embodiments of the present application, the cover plate assembly includes a cover plate and an insulating member. Among them, the first lead-out hole on the insulating member can be used for passing through the tab. The first surface of the insulating member is disposed close to the electrode core and abuts against the electrode core. Since the tab guiding portion inclines towards the second surface and extends to the first lead-out hole, the tab guiding portion actually forms an inclined surface on the first surface. The tab can pass through the first lead-out hole from the side of the insulating member close to the electrode core to the side of the insulating member away from the electrode core closely attached to the surface of the tab guiding portion. The tab guiding portion can provide a guiding effect for the tab, avoiding the random movement of the tab in the housing of the battery cell. Since the tab guiding portion forms an inclined surface on the first surface, the bending angle of the tab is reduced, and the safety performance of the battery cell is improved. In the cover plate assembly provided by the embodiments of the present application, the structure of the insulating member is simple, which not only reduces the bending angle of the tab, but also reduces the height space of the battery cell housing occupied by the insulating member, adapting to the current development trend of high safety performance and high volume energy density of the battery cell.

[0022] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is a schematic structural diagram of a battery cell in the embodiments of the present application;

[0025] Figure 2 is one of the schematic structural diagrams of the insulating member in the embodiments of the present application;

[0026] Figure 3 is another schematic structural diagram of the insulating member in the embodiments of the present application;

[0027] Figure 4 is one of the sectional views of the battery cell in the embodiments of the present application;

[0028] Figure 5 is another sectional view of the battery cell in the embodiments of the present application;

[0029] Reference numerals: 100 - cover plate assembly, 10 - insulating member, 101 - first surface, 102 - second surface, 11 - first lead-out hole, 12 - tab guiding portion, 13 - receiving groove, 14 - buckle, 15 - first through hole, 20 - cover plate, 21 - second lead-out hole, 22 - second through hole, 30 - tab lead-out piece, 31 - tab connecting portion, 32 - pole column connecting portion, 40 - pole column, 50 - cap, 501 - first receiving cavity, 60 - explosion-proof valve, 200 - housing, 300 - electrode core, 301 - tab, x - first direction, y - second direction, z - third direction. Detailed implementation manners

[0030] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0031] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

[0033] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0034] The embodiments of the present application provide a cover plate assembly, which can be used to block the housing of a battery cell, and at the same time, a pole column is provided for the conduction between the battery and an external circuit. According to the cover plate assembly provided by the embodiments of the present application, the insulating member has a simple structure and is convenient for assembly, and at the same time, it is beneficial to improve the safety performance and energy density of the battery cell.

[0035] The following further elaborates on the cover plate assembly provided in the embodiments of the present application in conjunction with the accompanying drawings and specific embodiments:

[0036] It should be noted that as Figures 1 to 5 shown, in the embodiments of the present application, the first direction is the direction indicated by arrow x, the second direction is the direction indicated by arrow y, and the third direction is the direction indicated by arrow z.

[0037] Referring to Figure 1 , it is an exploded view of a battery cell adopting the cover plate assembly 100 provided in the embodiments of the present application. As Figure 1 shown, the cover plate assembly 100 disclosed in the embodiments of the present application may include: an insulating member 10 and a cover plate 20. Among them, the cover plate 20 is generally a metal structure and seals the housing 200 of the battery cell. The insulating member 10 is disposed in the housing 200 and is located between the cover plate 20 and the electrode core 300. The insulating member 10 has insulating properties, so as to play an insulating role between the metal cover plate 20 and the electrode core 300.

[0038] Specifically, as Figure 2 、 Figure 3As shown, the insulating member 10 includes a first surface 101 and a second surface 102 which are arranged in opposite directions along a first direction x. In actual applications, the first surface 101 is suitable for being arranged close to the pole core 300, and the cover plate 20 is connected to the second surface 102; the insulating member 10 is provided with a first lead-out hole 11 which passes through the insulating member 10 along the first direction x; the first surface 101 is provided with a pole ear guide portion 12 which is inclined toward the second surface 102 and extends to the first lead-out hole 11, and the pole ear guide portion 12 is used to guide the pole ear 301 to the first lead-out hole. In actual applications, pole ears 301 are provided on both sides of the pole core 300 along the second direction y, and the pole ears 301 are led out from the inside of the pole core 300. The first surface 101 of the insulating member 10 abuts against the pole core 300. The size of the pole ear 301 along the third direction z is smaller than the size of the first lead-out hole 11 along the third direction z. Along the third direction z, the size of the pole ear guide portion 12 can be set to be the same as the size of the first lead-out hole 11. The pole ear 301 can be led out from the side edge of the pole core 300 to the first lead-out hole 11 along the pole ear guide portion 12, and pass through the insulating member 10 from the first lead-out hole 11 to the side of the insulating member 10 away from the pole core 300. The first lead-out hole 11 also provides a certain convergence effect on the pole ear 301, which can prevent the pole ear 301 from moving around at will. Since the pole lug 301 is generally composed of multiple layers of very thin aluminum / copper foil, it has a low hardness and is easily deformed during the assembly process. There is a risk of hidden cracks when the bending angle is too large. When the pole lug guide portion 12 of the insulating member 10 is a plane, the bending angle of the pole lug 301 is approximately a right angle. Since the pole lug guide portion 12 is an inclined surface, and is inclined from the first surface 101 toward the second surface 102 and extends to the first lead-out hole 11, the actual bending angle of the pole lug 301 is reduced, which is beneficial to ensuring the reliability of the pole lug 301 and ensuring the safety performance and service life of the battery cell.

[0039] It should be noted that if Figure 2 , Figure 3 As shown, the first surface 101 and the second surface 102 are roughly a plane, but in actual applications, considering the arrangement of the cover plate assembly 100 and other structural components in the pole core 300, the first surface 101 and the second surface 102 can be provided with a plurality of grooves of different shapes and sizes, which can reduce the overall mass of the insulating member 10 while playing an avoidance role.

[0040] like Figure 2 As shown, the angle between the tab guide portion 12 and the first surface 101 is α. Optionally, the angle α between the tab guide portion 12 and the first surface 101 satisfies: 20°≤α≤45°.

[0041] In practical applications, when α is less than 20°, the bending angle of the tab 301 is large, the structure is easily damaged, and a short circuit of the battery cell is caused. When α is greater than 45°, more space in the housing 200 is occupied, which is not conducive to improving the power density of the battery cell.

[0042] Optionally, the number of tab guiding portions 12 on the first surface 101 is two, and the two tab guiding portions 12 are symmetrically arranged on both sides of the first lead-out hole 11 along the second direction y, and the second direction y intersects with the first direction x.

[0043] In practical applications, lead tabs 301 are arranged on both sides of the electrode core 300 along the second direction y. By providing two tab guiding portions 12, the tab guiding portions 12 can simultaneously guide the lead tabs 301 on both sides of the electrode core 300. Further, the first lead-out hole 11 is arranged at the middle position of the insulating member 10 along the second direction y. Since the two tab guiding portions 12 are symmetrically arranged on both sides of the first lead-out hole 11 along the second direction y, the guiding and limiting effects of the two tab guiding portions 12 on the lead tabs 301 are more uniform, and the insulating member 10 can be well maintained in the middle position, which is beneficial to the subsequent assembly of the cover plate assembly 100; at the same time, the lead tabs 301 on both sides are more evenly stressed, ensuring the structural safety of the lead tabs 301.

[0044] In an embodiment of the present application, the cover plate assembly 100 further includes a tab lead-out piece 30. The lead tab 301 is connected to the tab lead-out piece 30 and passes through the first lead-out hole 11 together with the tab lead-out piece 30.

[0045] Since the pole post 40 and the lead tab 301 may not be completely opposite along the height direction of the battery cell sometimes, providing the tab lead-out piece 30 can serve as an intermediate connecting member to connect the lead tab 301 and the pole post 40 respectively, facilitating the electrical connection between the lead tab 301 and the pole post 40.

[0046] In an embodiment of the present application, the cover plate assembly 100 further includes a pole post 40. One end of the pole post 40 protrudes from the cover plate 20, and the other end passes through the cover plate 20 and the insulating member 10 and is connected to the tab lead-out piece 30.

[0047] Specifically, as Figure 1 、 Figure 5 shown, the pole post 40 is arranged on one side of the pole cap in the cover plate assembly 100 along the third direction z, while the lead tab 301 passes through the first lead-out hole 11 of the insulating member 10 and the second lead-out hole 21 of the cover plate 20 and is located at the middle position of the cover plate assembly 100 along the third direction z. In this structure, the lead tab 301 cannot be directly connected to the pole post 40. By providing the tab lead-out piece 30 and connecting the pole post 40 and the tab lead-out piece 30, the connection between the lead tab 301 and the pole post 40 can be facilitated. Since the pole post 40 is arranged on one side of the cover plate assembly 100, the height of the cover plate assembly 100 can be reduced, thereby reducing the overall height of the battery cell, which is beneficial to improving the volume power density of the battery cell.

[0048] In an embodiment of the present application, the tab lead piece 30 includes a tab connection portion 31 and a pole connection portion 32 arranged along the third direction z. The tab connection portion 31 passes through the first lead hole 11, and the pole connection portion 32 is connected to the first surface 101. Among them, the tab 301 is connected to the tab connection portion 31, and the pole 40 is connected to the pole connection portion 32. The third direction z intersects with the first direction x.

[0049] As Figure 1 shown, the tab 301 is located at the middle position of the electrode core 300 along the third direction z, and the pole 40 is located at the edge position of the electrode core 300 along the third direction z. The tab lead piece 30 includes a tab connection portion 31 and a pole connection portion 32. The tab 301 can be connected to the tab connection portion 31 and jointly pass through the first lead hole 11 with the tab connection portion 31. The pole connection portion 32 is arranged on one side of the tab connection portion 31. Since the pole 40 passes through the cover plate 20, the insulating member 10 and is connected to the pole connection portion 32, the pole connection portion 32 does not need to pass through the first lead hole 11. Therefore, the part of the insulating member 10 opposite to the pole connection portion 32 along the first direction x does not need to be opened. The size of the first lead hole 11 only needs to allow the tab 301 and the tab connection portion 31 to pass through.

[0050] In an embodiment of the present application, a receiving groove 13 is provided on the first surface 101. The receiving groove 13 is opposite to the pole connection portion 32 along the first direction x, and at least a part of the pole connection portion 32 is received in the receiving groove 13.

[0051] Specifically, the receiving groove 13 is a groove recessed in the first surface 101. Generally, the pole 40 is circular, so the pole connection portion 32 is also set to be circular. Correspondingly, the receiving groove 13 is also set to be a substantially circular shape larger than the pole connection portion 32.

[0052] A first through hole 15 is also provided on the insulating member 10 at a position opposite to the pole connection portion 32. Correspondingly, a second through hole 22 is also provided on the cover plate 20 at a position opposite to the pole connection portion 32. The settings of the first through hole 15 and the second through hole 22 can be used for the pole 40 to pass through the cover plate 20 and the insulating member 10 to realize electrical connection with the pole connection portion 32 on the tab lead piece 30.

[0053] In an embodiment of the present application, a buckle 14 is provided on the first surface 101. The buckle 14 protrudes from the first surface 101, and the tab connection portion 31 is snap-connected to the buckle 14.

[0054] Specifically, a slot can be set on the buckle 14, and a protrusion can be set at a position opposite to the tab lead-out piece 30 and the buckle 14, so that the protrusion of the tab lead-out piece 30 is stuck in the slot, and the two can be connected. In addition, a slot can be set at a position opposite to the tab lead-out piece 30 and the buckle 14, so that the buckle 14 is stuck in the slot of the tab lead-out piece 30, and the two can also be connected. The present application does not specifically limit the details of the connection between the tab lead-out piece 30 and the insulating member 10.

[0055] The tab lead-out piece 30 is located between the insulating member 10 and the pole core 300 and is connected to the first surface 101 of the insulating member 10. A buckle 14 is provided to engage with the tab connecting portion 31 of the tab lead-out piece 30, which can effectively prevent the tab lead-out piece 30 from moving in all directions and improve the connection effect between the tab lead-out piece 30 and the insulating member 10.

[0056] Optionally, the number of the buckles 14 is two, and the two buckles 14 are arranged on both sides of the first lead-out hole 11 along the third direction z.

[0057] It can be understood that since the clip 14 is used for the clip connection between the pole tab lead-out piece 30 and the insulating member 10, when two clips 14 are provided, the connection strength between the pole tab lead-out piece 30 and the insulating member 10 can be enhanced, and relative displacement between the insulating member 10 and the pole tab lead-out piece 30 can be effectively prevented, thereby further improving the structural stability of the cover plate assembly 100, which is beneficial to ensuring the performance of the cover plate assembly 100, improving the reliability of the battery cell, and extending the service life of the battery cell.

[0058] In one embodiment of the present application, the cover plate 20 is provided with a second lead-out hole 21, and the cover plate assembly 100 also includes a cap 50, which is connected to the side of the cover plate 20 facing away from the insulating member 10, and is enclosed with the cover plate 20 to form a first accommodating cavity 501, and the pole ear 301 passes through the first lead-out hole 11 and the second lead-out hole 21 and is at least partially accommodated in the first accommodating cavity 501.

[0059] Specifically, the cap 50 is a hollow structure similar to a cuboid and has an opening. The size of the second lead-out hole 21 on the cover plate 20 is adapted to the opening of the cap 50. When the cap 50 is connected to the cover plate 20, it can be enclosed with the cover plate 20 to form a first accommodating cavity 501. Since the pole lug 301 can pass through the first lead-out hole 11 and the second lead-out hole 21 and be accommodated in the first accommodating cavity 501, the pole lug 301 can be arranged in the space below the cover plate 20 without being folded, thereby avoiding the accumulation of the pole lug 301 between the cover plate 20 and the pole core 300. In addition, without considering the space occupied by the accumulation of the pole lug 301, a pole core 300 of a larger volume can be arranged in the shell 200 of the battery cell, which is conducive to achieving a high volume energy density of the battery cell.

[0060] In practical applications, the cover assembly 100 further includes an explosion-proof valve 60. The cover 20 and the insulating member 10 are also provided with liquid injection holes, and the explosion-proof valve 60 is connected to the liquid injection holes and seals the liquid injection holes.

[0061] The present application also discloses a battery cell, including: a housing 200, a core 300, and the cover assembly 100 as described above. The housing 200 includes a second accommodation cavity with an opening. The core 300 is disposed in the second accommodation cavity, and the cover assembly 100 is connected to the core 300 and seals the opening. Among them, the tab 301 includes two ends disposed away from each other. One end of the tab 301 is connected to the core 300, and the other end is accommodated in the cover assembly 100.

[0062] It should be noted that for the battery cell provided by the embodiments of the present application, when the cover assembly 100 as described above is adopted, not only is the insulation effect between the core 300 and the cover 20 good, but the insulating member 10 also does not occupy too much height space of the housing 200. When the housing 200 is certain, the size of the core 300 can be increased, thereby improving the power density of the battery cell. Similarly, when the core 300 is certain, the size of the housing 200 can be reduced, thereby reducing the overall volume of the battery cell, which is beneficial to the layout of the battery cell in the battery pack or the electrical device.

[0063] The present application also discloses an electrical device, including the battery cell as described above. Among them, the battery cell can be disposed in a battery pack, and the battery pack can include multiple battery cells. The type of the electrical device of the present application may not be specifically limited. Exemplarily, the electrical device can be a mobile phone, a tablet computer, a household appliance, an electric vehicle, a medical device, etc.

[0064] In summary, the cover assembly provided by the embodiments of the present application has at least the following advantages:

[0065] In the embodiments of the present application, the cover assembly includes a cover and an insulating member. Among them, the first lead-out hole on the insulating member can be used to pass through the tab. The first surface of the insulating member is close to the core and abuts against the core. Since the tab guiding portion inclines towards the second surface and extends to the first lead-out hole, the tab guiding portion actually forms an inclined surface on the first surface. The tab can closely adhere to the surface of the tab guiding portion and pass through the first lead-out hole from the side of the insulating member close to the core to the side of the insulating member away from the core. The tab guiding portion can provide a guiding function for the tab, avoiding the tab from randomly moving in the housing of the battery cell. Since the tab guiding portion forms an inclined surface on the first surface, the bending angle of the tab is reduced, and the safety performance of the battery cell is improved. In the cover assembly provided by the embodiments of the present application, the structure of the insulating member is simple, which not only reduces the bending angle of the tab but also reduces the height space of the battery cell housing occupied by the insulating member, adapting to the current development trend of high safety performance and high volume energy density of the battery cell.

[0066] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, characterized in that: include: Insulation and cover; wherein, The insulating member comprises a first surface and a second surface which are arranged in a first direction away from each other, the first surface is arranged close to the pole core, and the cover plate is connected to the second surface; The insulating member is provided with a first lead-out hole penetrating the insulating member along the first direction; The first surface is provided with a tab guide portion which is inclined toward the second surface and extends to the first lead-out hole, and the tab guide portion is used to guide the tab to the first lead-out hole.

2. The cover plate assembly according to claim 1, characterized in that: The included angle between the tab guide portion and the first surface is α, which satisfies: 20°≤α≤45°.

3. The cover plate assembly according to claim 1, characterized in that: The number of the tab guide portions on the first surface is two, and the two tab guide portions are symmetrically arranged on both sides of the first lead-out hole along a second direction, and the second direction intersects with the first direction.

4. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly further includes a tab lead-out plate, the tab is connected to the tab lead-out plate, and passes through the first lead-out hole together with the tab lead-out plate.

5. The cover plate assembly according to claim 4, characterized in that: The cover plate assembly also includes a pole, one end of which protrudes from the cover plate, and the other end of which passes through the cover plate and the insulating member and is connected to the pole lug lead-out piece.

6. The cover plate assembly according to claim 5, characterized in that: The pole lug lead-out piece includes a pole lug connection portion and a pole column connection portion arranged along a third direction, the pole lug connection portion passes through the first lead-out hole, and the pole column connection portion is connected to the first surface, wherein the pole lug is connected to the pole lug connection portion, the pole is connected to the pole column connection portion, and the third direction intersects with the first direction.

7. The cover plate assembly according to claim 6, characterized in that: The first surface is provided with a receiving groove, the receiving groove is opposite to the pole connecting portion along the first direction, and the pole connecting portion is at least partially received in the receiving groove.

8. The cover plate assembly according to claim 6, characterized in that: The first surface is provided with a buckle, the buckle protrudes from the first surface, and the tab connecting portion is buckled with the buckle.

9. The cover plate assembly according to claim 8, characterized in that: The number of the buckles is two, and the two buckles are arranged on both sides of the first lead-out hole along the third direction.

10. The cover plate assembly according to claim 1, characterized in that: The cover plate is provided with a second lead-out hole, and the cover plate assembly also includes a cover cap, which is connected to the side of the cover plate away from the insulating member and encloses the cover plate to form a first accommodating cavity, and the pole ear passes through the first lead-out hole and the second lead-out hole and is at least partially accommodated in the first accommodating cavity.

11. A battery cell, characterized in that: include: A shell, a pole core and a cover plate assembly as described in any one of claims 1 to 10, wherein the shell includes a second accommodating cavity with an opening, the pole core is arranged in the second accommodating cavity, and the cover plate assembly is connected to the pole core and blocks the opening; wherein the pole ear includes two ends arranged in opposite directions, one end of the pole ear is connected to the pole core, and the other end is accommodated in the cover plate assembly.

12. An electrical equipment, characterized in that: Comprising the battery cell as claimed in claim 11.

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