Cover plate assembly and battery cell

Abstract

The utility model belongs to the technical field of batteries, particularly relates to a cover plate assembly and a battery cell, and solves the technical problems that the space required by the cover plate assembly is large and the internal space of the battery is reduced. The cover plate assembly comprises a substrate, a side plate, a pole and a separator, the substrate is provided with a mounting hole, and the mounting hole penetrates through the substrate along the thickness direction of the substrate. The side plate is arranged on one side of the base plate in the thickness direction of the base plate and surrounds the mounting hole, and a flanging is arranged at the end, away from the base plate, of the side plate and is adjacent to the mounting hole. The poles and the side plates are located on the same side of the substrate, and part of the poles are located in the mounting holes and spaced from the mounting holes. The separator is arranged between the pole and the substrate and between the pole and the side plate, and abuts against the pole and the flanging. The cover plate assembly is simple in structure, simple in manufacturing process and low in manufacturing cost, meanwhile, the height of the cover plate assembly is reduced, and the internal space of the battery is increased.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of batteries, and particularly to a cover plate assembly and an electric core. Background Art

[0002] With the rapid development of economy and technology, batteries are more and more widely used. A battery is a power source that provides power for electrical equipment such as electric vehicles, electric trains, electric bicycles, golf carts, televisions, computers, mobile phones, AR devices (Augmented Reality), or VR devices (Virtual Reality).

[0003] A battery includes an electric core, which usually includes a housing, electrode plates disposed in the housing, and a cover plate assembly buckled on the housing. The housing usually contains electrolyte. A good seal needs to be formed between the housing and the cover plate assembly during the assembly process to prevent electrolyte leakage. For this reason, the parts of the cover plate assembly are usually connected by welding.

[0004] However, the above-mentioned cover plate assembly requires a large space, further compressing the internal space of the battery. Summary of the Utility Model

[0005] In view of the above problems, the embodiments of the present utility model provide a cover plate assembly and an electric core, which reduce the overall height of the cover plate assembly and increase the internal space of the battery.

[0006] The first aspect of the embodiments of the present utility model provides a cover plate assembly, which includes:

[0007] A substrate having a mounting hole that penetrates the substrate along the thickness direction of the substrate;

[0008] A side plate disposed on one side of the substrate along the thickness direction of the substrate and surrounding the mounting hole. One end of the side plate away from the substrate has a flanging that is adjacent to the mounting hole;

[0009] A pole column located on the same side of the substrate as the side plate. Part of the pole column is located in the mounting hole and is spaced from the mounting hole;

[0010] An isolation member disposed between the pole column and the substrate and the side plate and abutting against both the pole column and the flanging.

[0011] In some possible embodiments, the flanging is formed by a rolling process and abuts against the surface of the isolation member away from the substrate.

[0012] In some possible embodiments, a groove is further provided on a surface of the base plate adjacent to the side plate, the mounting hole is provided at the bottom of the groove, and the side plate surrounds the groove.

[0013] In some possible embodiments, the side plate completely surrounds the groove, the inner circumference of the side plate is aligned with the side wall of the groove, and the side plate is formed by stamping.

[0014] In some possible embodiments, a limiting portion is formed on a side surface of the pole, and the limiting portion extends outward from the mounting hole;

[0015] The isolating member comprises a sealing ring and an insulating plate in contact with each other, wherein the sealing ring and the insulating plate are both sleeved on the pole, and the insulating plate is located on a side of the sealing ring close to the side plate, and the limiting portion also extends between the sealing ring and the insulating plate.

[0016] In some possible embodiments, the sealing ring is arranged on a side of the limiting portion adjacent to the substrate;

[0017] The insulating plate includes a body and a first baffle, wherein the body is arranged on a side of the limiting portion away from the mounting hole and abuts against the limiting portion, and the first baffle is arranged on a side of the body adjacent to the mounting hole and abuts against the sealing ring.

[0018] In some possible embodiments, the sealing ring extends outward from the limiting portion, and the first baffle abuts against a surface of the sealing ring away from the mounting hole;

[0019] Alternatively, the first baffle extends outward from the limiting portion, and the first baffle abuts against the outer peripheral surface of the sealing ring.

[0020] In some possible embodiments, the sealing ring is disposed on a side of the limiting portion adjacent to the substrate and extends to a side surface of the limiting portion;

[0021] The insulating plate comprises a body, which is arranged on a side of the limiting portion away from the mounting hole and abuts against the limiting portion.

[0022] In some possible embodiments, the insulating plate further includes a second baffle disposed on a side of the body away from the mounting hole, an outer peripheral surface of the second baffle being concave inwardly from an outer peripheral surface of the body, and the flange being located on a side of the second baffle away from the pole.

[0023] The cover plate assembly of the embodiment of the utility model has at least the following advantages:

[0024] In the embodiment of the present utility model, the cover plate assembly includes a substrate, a side plate, a pole column, and a spacer. The substrate has a mounting hole, and along the thickness direction of the substrate, the mounting hole penetrates through the substrate. Along the thickness direction of the substrate, the side plate is arranged on one side of the substrate and surrounds the mounting hole. One end of the side plate away from the substrate has a flanging, and the flanging is adjacent to the mounting hole. The pole column and the side plate are on the same side of the substrate, and part of the pole column is located in the mounting hole and is spaced from the mounting hole. The spacer is arranged between the pole column and the substrate and the side plate, and abuts against both the pole column and the flanging. The spacer is used to prevent the pole column from contacting the substrate and the side plate, and the flanging is used to fix the spacer and the pole column relative to the substrate without welding. The structure of the cover plate assembly is simple, the manufacturing process is simple, the manufacturing cost is reduced. At the same time, the height of the cover plate assembly is decreased, and the internal space of the battery is increased.

[0025] In the second aspect of the embodiment of the present utility model, a battery cell is further provided, which includes a housing and the cover plate assembly as described above. The housing has an opening, and the cover plate assembly is buckled on the opening. Since the battery cell includes the above cover plate assembly, it has at least the advantages of simple structure, simple manufacturing process, and reduced height. For specific effects, please refer to the above, and details will not be repeated here.

[0026] In addition to the technical problems solved by the embodiments of the present utility model, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions described above, other technical problems that can be solved by the cover plate assembly and the battery cell provided by the embodiments of the present utility model, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manners. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Schematic diagram of the cover plate assembly in the embodiment of the present utility model;

[0029] Figure 2 Stereogram of the cover plate assembly in the embodiment of the present utility model;

[0030] Figure 3 Forming process diagram of the flanging in the embodiment of the present utility model.

[0031] Description of the reference numerals:

[0032] 10 - Substrate;

[0033] 11 - Mounting hole;

[0034] 20 - Side plate;

[0035] 21 - Flange;

[0036] 30 - Insulating plate;

[0037] 40 - Sealing ring;

[0038] 50 - Terminal post;

[0039] 51 - Limiting part. Specific embodiments

[0040] In the related art, the structures in the cover plate assembly are fixed by welding for sealing. However, the space required for welding and sealing is greatly increased, the internal space of the battery is further compressed, the weight of the battery is increased, the assembly process is cumbersome, and the weight of the battery core and electrolyte that can be carried becomes lower.

[0041] In view of this, the embodiments of the present invention provide a cover plate assembly and a battery core. The cover plate assembly includes a base plate, a side plate, a terminal post and a separator. The base plate has a mounting hole. The side plate is disposed on one side of the base plate and surrounds the mounting hole. The end of the side plate away from the base plate has a flanged portion. The terminal post is located in the mounting hole and is spaced from the mounting hole. The separator separates the terminal post from the base plate and the terminal post from the side plate, and abuts against both the terminal post and the flange. The separator and the terminal post are fixed relative to the base plate by using the flange, without welding. The structure of the cover plate assembly is simple, the manufacturing process is simple, the manufacturing cost is reduced. At the same time, the height of the cover plate assembly is decreased, and the internal space of the battery is increased.

[0042] In order to make the above objects, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] The embodiments of the present invention provide a battery core. The battery core can be in a columnar shape, such as a cylinder or an elliptical cylinder; the battery core can also be in a cubic shape, such as a cube or a cuboid. The battery core includes a housing (not shown in the figure) and a cover plate assembly. The housing provides support and protection for the structures therein, and its material can be an insulating material. The housing has an opening, for example, one end or both ends of the housing are formed with openings. The cover plate assembly is buckled on the opening to block the opening and realize the external connection of the battery core.

[0044] The battery cell further includes a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolyte. The electrolyte can transfer active ions during the charging and discharging process of the battery cell, enabling the battery cell to operate normally. The active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode plate and the negative electrode plate. The separator is used to prevent the positive electrode plate and the negative electrode plate from short-circuiting and allows the active ions to pass through.

[0045] The positive electrode plate forms the positive electrode of the battery cell and includes a positive electrode current collector and positive electrode active material disposed on at least one surface of the positive electrode current collector. The negative electrode plate forms the negative electrode of the battery cell and includes a negative electrode current collector and negative electrode active material disposed on at least one surface of the negative electrode current collector. Both the positive electrode current collector and the negative electrode current collector can adopt existing structures and materials, and both the positive electrode active material and the negative electrode active material can adopt existing materials, which will not be elaborated here.

[0046] Refer to Figures 1 to 3 , the cover plate assembly includes a base plate 10, a side plate 20, a terminal 50 and a spacer. Among them, the base plate 10 has a mounting hole 11. Along the thickness direction of the base plate 10, the mounting hole 11 penetrates through the base plate 10, that is, the mounting hole 11 is a through hole penetrating the base plate 10. Among them, the thickness direction of the base plate 10 refers to the direction in which the base plate 10 faces away from the housing ( Figure 1 the Z direction shown), the material of the base plate 10 includes metals with good ductility, such as aluminum, copper, gold, etc. The shape of the mounting hole 11 can be circular, oval, rectangular, etc., which is not limited in the embodiments of the present application.

[0047] Along the thickness direction of the base plate 10, the side plate 20 is disposed on one side of the base plate 10 and surrounds the mounting hole 11. One end of the side plate 20 away from the base plate 10 has a flange 21, and the flange 21 is adjacent to the mounting hole 11. As Figure 1 shown, the side plate 20 is disposed on the upper side of the base plate 10. The side plate 20 can completely surround the mounting hole 11. For example, the side plate 20 is in a cylindrical shape and surrounds the mounting hole 11 for a full circle. The side plate 20 can also partially surround the mounting hole 11. For example, the side plate 20 surrounds the mounting hole 11 for half a circle or three-quarters of a circle. The side plate 20 can also surround the mounting hole 11 at intervals. For example, the side plate 20 has a plurality of sub-plates, and the plurality of sub-plates are arranged at intervals along the circumferential direction of the mounting hole 11.

[0048] As Figures 1 to 3 shown, the side plate 20 is spaced from the mounting hole 11, that is, the inner circumferential surface of the side plate 20 protrudes from the inner circumferential surface of the mounting hole 11, so that the mounting hole 11 is completely exposed in the area enclosed by the side plate 20. And, the part of the base plate 10 exposed in the area enclosed by the side plate 20 can also provide support and limit for the terminal 50, making it difficult for the terminal 50 to completely pass through the mounting hole 11, thus facilitating the relative fixation of the terminal 50 and the base plate 10.

[0049] In some possible examples, a groove is further provided on the surface of the substrate 10 adjacent to the side plate 20, and a mounting hole 11 is provided at the bottom of the groove. The side plate 20 also surrounds the groove. Wherein, the shape of the groove can be adapted to the shape of the mounting hole 11. For example, both the groove and the mounting hole 11 are circular holes. The size of the groove is larger than the size of the mounting hole 11. For example, the groove wall protrudes from the inner peripheral surface of the mounting hole 11, so that the groove and the mounting hole 11 form a stepped shape.

[0050] The side plate 20 completely surrounds the groove, and the inner peripheral surface of the side plate 20 is aligned with the side wall of the groove. The side plate 20 has a certain ductility, so that the side plate 20 can be formed by stamping. In some possible examples, the side plate 20 and the substrate 10 are of an integral structure, that is, the side plate 20 and the substrate 10 are a whole, which is convenient for connecting the side plate 20 and the substrate 10 and can ensure the reliability of the connection between the side plate 20 and the substrate 10.

[0051] Specifically, the substrate 10 is placed in a stamping die for stamping, and vertical protrusions are formed on the surface of one side of the substrate 10, and these vertical protrusions form the side plate 20. Further, the side plate 20 and the groove are formed simultaneously by stamping. In this way, the size of the side plate 20 can be increased, so that the side plate 20 has a sufficient height.

[0052] Wherein, the side plate 20 further has a flanging 21, and the flanging 21 is located at one end away from the substrate 10 and turns inward towards the mounting hole 11. Wherein, the flanging 21 is formed by a rolling process, that is, the end of the side plate 20 away from the substrate 10 is flattened by using a rolling tooling.

[0053] Specifically, after the substrate 10, the separator and the pole column 50 are assembled, the side plate 20 is flattened by using processes such as rolling to form the flanging 21, and the flanging 21 abuts against the surface of the separator facing away from the substrate 10 to realize the fixation and sealing of the substrate 10, the separator and the pole column 50. In this way, the structure of the cover plate assembly is simple, the sealing performance is good, the weight is light, the manufacturing process is simple, the manufacturing cost is reduced, and at the same time, the height of the cover plate assembly is reduced, and the internal space of the battery is increased.

[0054] Continue to refer to Figures 1 to 3 , the pole column 50 and the side plate 20 are located on the same side of the substrate 10, and part of the pole column 50 is located in the mounting hole 11 and is spaced from the mounting hole 11. Such a setting makes the pole column 50 pass through the mounting hole 11 on the one hand to realize the connection inside and outside the battery cell; on the other hand, it avoids the contact between the pole column 50 and the side wall of the mounting hole 11, thereby avoiding the contact conduction between the pole column 50 and the substrate 10 and ensuring the normal operation of the battery cell.

[0055] Wherein, the pole column 50 can include a positive pole column and a negative pole column, and the positive pole column and the negative pole column are spaced apart. The positive pole column is connected to the positive electrode plate, and the negative pole column is connected to the negative electrode plate. The material of the positive pole column can be an aluminum-containing metal, and the material of the negative pole column can be a copper-containing metal.

[0056] In some possible examples, a limiting portion 51 is formed on the side surface of the terminal post 50, and the limiting portion 51 extends out of the mounting hole 11. The limiting portion 51 may be an annular structure. Exemplarily, in the thickness direction of the cover plate, the terminal post 50 includes a first split body, a second split body, and a third split body that are sequentially connected. The outer peripheral surface of the second split body protrudes from the outer peripheral surface of the first split body and protrudes from the outer peripheral surface of the third split body. The part of the second split body that protrudes from the first split body and the third split body forms the limiting portion 51.

[0057] Among them, the first split body passes through the mounting hole 11 and is spaced from the mounting hole 11 to avoid contact between the first split body and the mounting hole 11. Other structures, such as a stopper, etc., can be accommodated in the gap between the first split body and the mounting hole 11. Both the second split body and the third split body extend out of the mounting hole 11 and are electrically isolated from the housing and the side plate 20 through an isolation member.

[0058] The shapes of the first split body, the second split body, and the third split body may be the same, for example, all are cylinders. The first split body, the second split body, and the third split body may be an integral structure and are coaxially arranged so that the terminal post 50 has good symmetry. The outer peripheral surface of the first split body may also be recessed from the outer peripheral surface of the third split body. In this way, while ensuring the connection between the first split body and the positive electrode plate / negative electrode plate, the contact between the first split body and the mounting hole 11 is avoided to the greatest extent.

[0059] Continue to refer to Figure 1 and Figure 2 , the isolation member is arranged between the terminal post 50 and the substrate 10, and between the terminal post 50 and the side plate 20, and is used to isolate the terminal post 50 from the substrate 10 and the terminal post 50 from the side plate 20, avoiding contact between the terminal post 50 and the substrate 10 and contact between the terminal post 50 and the side plate 20. The isolation member also abuts against both the terminal post 50 and the flanging 21, thereby limiting the isolation member and the terminal post 50 and realizing the relative fixation of the isolation member and the terminal post 50 with respect to the substrate 10.

[0060] Among them, the isolation member includes a sealing ring 40 and an insulating plate 30, and the sealing ring 40 and the insulating plate 30 are in contact with each other. Both the sealing ring 40 and the insulating plate 30 are sleeved on the terminal post 50. The insulating plate 30 is located on the side of the sealing ring 40 close to the side plate 20. The limiting portion 51 of the terminal post 50 also extends between the sealing ring 40 and the insulating plate 30, so that the sealing ring 40 and the insulating plate 30 can limit the terminal post 50, thereby realizing the relative fixation of the terminal post 50 and the isolation member.

[0061] The material of the insulating plate 30 includes polyphenylene sulfide (PPS), and the material of the sealing ring 40 includes materials such as rubber. The insulating plate 30 is located within the area enclosed by the side plate 20, or the insulating plate 30 is located within the area enclosed by the side plate 20 and within the groove of the substrate 10.

[0062] In some embodiments, the sealing ring 40 is disposed on one side of the limiting portion 51 adjacent to the substrate 10. As shown in Figure 1 , the sealing ring 40 is disposed below the limiting portion 51. The insulating plate 30 includes a body and a first baffle. The body is disposed on one side of the limiting portion 51 away from the mounting hole 11 and abuts against the limiting portion 51. As shown in Figure 1 , the body is disposed above the limiting portion 51. The first baffle is disposed on one side of the body adjacent to the mounting hole 11 and abuts against the sealing ring 40. As shown in Figure 1 , the first baffle is disposed on the side surface of the limiting portion 51, and the outer peripheral surface of the first baffle may be aligned with the outer peripheral surface of the body.

[0063] In some possible implementation manners, the sealing ring 40 extends out of the limiting portion 51, and the first baffle abuts against the surface of the sealing ring 40 facing away from the mounting hole 11. As shown in Figure 1 , the outer peripheral surface of the sealing ring 40 protrudes from the outer peripheral surface of the limiting portion 51. The first baffle is disposed outside the limiting portion 51 and abuts against the surface of the sealing ring 40 facing away from the mounting hole 11 ( Figure 1 the upper surface shown in), so as to press the sealing ring 40 between the limiting portion 51 and the substrate 10, and sealing between the limiting portion 51 and the substrate 10 can be achieved, and the sealing effect is better, and the structure of the sealing ring 40 is simple.

[0064] In some possible implementation manners, the first baffle extends out of the limiting portion 51, that is, the first baffle extends to the side surface of the sealing ring 40, and the first baffle abuts against the outer peripheral surface of the sealing ring 40, so as to press the sealing ring 40 between the limiting portion 51 and the substrate 10 to achieve sealing between the limiting portion 51 and the substrate 10.

[0065] In some other embodiments, the sealing ring 40 is disposed on one side of the limiting portion 51 adjacent to the substrate 10 and extends to the side surface of the limiting portion 51. The sealing ring 40 contacts the surface of the limiting portion 51 adjacent to the mounting hole 11 and faces the outer peripheral surface of the limiting portion 51. The insulating plate 30 includes a body. The body is disposed on one side of the limiting portion 51 away from the mounting hole 11 and abuts against the limiting portion 51. The body abuts against the surface of the limiting portion 51 facing away from the mounting hole 11. In this way, the structure of the insulating plate 30 can be simplified.

[0066] In the above two embodiments, the insulating plate 30 further includes a second baffle disposed on one side of the body away from the mounting hole 11. The outer peripheral surface of the second baffle is recessed from the outer peripheral surface of the body, and the flanging 21 is located on the side of the second baffle away from the pole column 50. As shown in Figure 1As shown, the second baffle is close to the terminal post 50. Exemplarily, the inner peripheral surface of the second baffle is flush with the inner peripheral surface of the body. The outer peripheral surface of the second baffle is concave with respect to the outer peripheral surface of the body, such that a step is formed between the second baffle and the body. The flanging 21 is located on the body and does not exceed the second baffle. On the one hand, it facilitates the positioning and formation of the flanging 21, and on the other hand, it can prevent the flanging 21 from contacting the terminal post 50.

[0067] As Figure 3 shown, the cover plate assembly in the embodiment of the present application can be formed through the following process: placing the substrate 10 into a stamping die for stamping or milling the substrate 10 to form a side plate 20 on one side surface of the substrate 10 and forming a mounting hole 11 in the area enclosed by the side plate 20; sequentially placing the sealing ring 40, the insulating plate 30, and the terminal post 50 into the area enclosed by the side plate 20 according to the geometric center point, with one end of the terminal post 50 extending into the mounting hole 11; using a rolling tooling to press the end of the side plate 20 away from the substrate 10 flat onto the insulating plate 30 to form a seal.

[0068] In summary, the cover plate assembly in the embodiment of the present application includes a substrate 10, a side plate 20, a terminal post 50, and a spacer. The substrate 10 has a mounting hole 11, and along the thickness direction of the substrate 10, the mounting hole 11 penetrates through the substrate 10. Along the thickness direction of the substrate 10, the side plate 20 is disposed on one side of the substrate 10 and surrounds the mounting hole 11. The end of the side plate 20 away from the substrate 10 has a flanging 21, and the flanging 21 is adjacent to the mounting hole 11. The terminal post 50 and the side plate 20 are located on the same side of the substrate 10, and a part of the terminal post 50 is located in the mounting hole 11 and is spaced from the mounting hole 11. The spacer is disposed between the terminal post 50 and the substrate 10 and the side plate 20, and abuts against both the terminal post 50 and the flanging 21. The spacer is used to prevent the terminal post 50 from contacting the substrate 10 and the side plate 20, and the flanging 21 is used to fix the spacer and the terminal post 50 relative to the substrate 10 without welding. The structure of the cover plate assembly is simple, the manufacturing process is simple, the manufacturing cost is reduced, and at the same time, the height of the cover plate assembly is decreased, improving the internal space of the battery.

[0069] In the present specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other.

[0070] Those skilled in the art should understand that in the disclosure of this utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this utility model.

[0071] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of this utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this utility model, rather than to limit it; although this utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cover plate assembly, characterized in that: include: A substrate, wherein the substrate has a mounting hole, and the mounting hole penetrates the substrate along a thickness direction of the substrate; A side plate, along the thickness direction of the base plate, the side plate is arranged on one side of the base plate and surrounds the mounting hole, and one end of the side plate away from the base plate has a flange, and the flange is adjacent to the mounting hole; A pole, wherein the pole and the side plate are located on the same side of the base plate, and part of the pole is located in the mounting hole and spaced apart from the mounting hole; The isolating member is arranged between the pole and the base plate and the side plate, and abuts against the pole and the flange.

2. The cover plate assembly according to claim 1, characterized in that: The flange is formed by a rolling process and abuts against a surface of the isolation member facing away from the substrate.

3. The cover plate assembly according to claim 1, characterized in that: A groove is further arranged on the surface of the base plate adjacent to the side plate, the bottom of the groove is provided with the mounting hole, and the side plate surrounds the groove.

4. The cover plate assembly according to claim 3, characterized in that: The side plate completely surrounds the groove, the inner circumference of the side plate is aligned with the side wall of the groove, and the side plate is formed by stamping.

5. The cover plate assembly according to claim 1, characterized in that: A limiting portion is formed on the side of the pole, and the limiting portion extends outward from the mounting hole; The isolating member comprises a sealing ring and an insulating plate in contact with each other, wherein the sealing ring and the insulating plate are both sleeved on the pole, and the insulating plate is located on a side of the sealing ring close to the side plate, and the limiting portion also extends between the sealing ring and the insulating plate.

6. The cover plate assembly according to claim 5, characterized in that: The sealing ring is arranged on a side of the limiting portion adjacent to the substrate; The insulating plate includes a body and a first baffle, wherein the body is arranged on a side of the limiting portion away from the mounting hole and abuts against the limiting portion, and the first baffle is arranged on a side of the body adjacent to the mounting hole and abuts against the sealing ring.

7. The cover plate assembly according to claim 6, characterized in that: The sealing ring extends outward from the limiting portion, and the first baffle abuts against a surface of the sealing ring away from the mounting hole; Alternatively, the first baffle extends outward from the limiting portion, and the first baffle abuts against the outer peripheral surface of the sealing ring.

8. The cover plate assembly according to claim 5, characterized in that: The sealing ring is arranged on a side of the limiting portion adjacent to the substrate and extends to a side surface of the limiting portion; The insulating plate comprises a body, which is arranged on a side of the limiting portion away from the mounting hole and abuts against the limiting portion.

9. The cover plate assembly according to claim 6 or 8, characterized in that: The insulating plate further comprises a second baffle plate arranged on a side of the body away from the mounting hole, the outer peripheral surface of the second baffle plate is concave inwardly of the outer peripheral surface of the body, and the flange is located on a side of the second baffle plate away from the pole.

10. A battery cell, characterized in that: include: A shell, and a cover assembly as described in any one of claims 1 to 9, wherein the shell has an opening, and the cover assembly is buckled on the opening.

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