Cover plate assembly and battery with same
The screw-threaded connection between the terminal and connection block in battery covers simplifies manufacturing, reduces costs, and improves product quality by securing connections without welding, facilitating easy maintenance.
Patent Information
- Application Number
- CN202421554342.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-03
AI Technical Summary
In the existing battery cover design, the welding process between the pole pillars and pins is complicated, resulting in high production costs, many quality problems and high replacement costs.
The cover plate assembly with threaded connection is adopted to achieve a fixed connection between the pole pillar and the connecting block through the threaded connection between the pole pillar and the connecting block, and avoid welding operations.
The process flow is simplified, production efficiency is improved, replacement cost is reduced, connection stability and airtightness are ensured, and battery usage quality is improved.
Smart Images
Figure CN223109020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery with the same. Background Art
[0002] At present in the market, the designs of battery top covers generally adopt the minimalist type and the riveting type. However, their common pain points lie in the complex welding process of the pole columns and pins during the manufacturing process, which not only increases the production cost, but also easily leads to various quality problems such as welding holes, explosion and fire, false soldering, and welding deviation, as well as problems such as unqualified pin pulling force and insufficient penetration depth after welding. Especially in the application of laser welding, the handling of defective products is not only difficult, but also results in high replacement costs, greatly reducing the product quality.
[0003] Therefore, there is an urgent need for a cover plate assembly and a battery with the same to solve the problems existing in the prior art. Summary of the Utility Model
[0004] The first object of the utility model is to provide a cover plate assembly for solving the technical problems that the connection method between traditional pole columns and pins leads to low production quality and poor safety and reliability of products.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] The cover plate assembly includes a base plate, a connection block, connection pins and pole columns. The connection block is arranged on the top of the base plate, the connection pins are arranged on the bottom of the base plate. A first assembly hole is opened on the base plate, a second assembly hole is opened on the connection pins, a threaded hole is opened on the connection block. The pole column includes a terminal seat and a column body. The column body is arranged on the terminal seat, and an external thread section is arranged on the column body. The column body passes through the first assembly hole and the second assembly hole and is threadedly connected to the connection block. The top surface of the terminal seat is attached to and pressed against the bottom surface of the connection pin, so that the connection pin is clamped between the terminal seat and the base plate.
[0007] Preferably, a boss protrudes from the bottom of the connection block, and the threaded hole is formed in the boss. The boss passes through the first assembly hole and is threadedly connected to the column body.
[0008] Preferably, the column body includes an assembly part and a relief part. The external thread section is arranged on the assembly part, and the relief part is located between the terminal seat and the assembly part.
[0009] Preferably, the outer sidewall of the terminal block has a first inclined surface, and the inner sidewall of the second assembly hole has a second inclined surface. The first inclined surface and the second inclined surface have the same inclination angle, and the first inclined surface fits and abuts against the second inclined surface to press the connection pin on the substrate.
[0010] Preferably, the outer sidewall of the terminal block further has a flat portion, and the flat portion is connected to the first inclined surface so that the cross-sectional shape of the terminal block is trapezoidal.
[0011] Preferably, the inclination angle range of the first inclined surface and the second inclined surface is 20° to 60°.
[0012] Preferably, the inclined surface lengths of the first inclined surface and the second inclined surface range from 3 to 4 mm.
[0013] Preferably, the surface roughness range of the first inclined surface and the second inclined surface is 1.0 mm to 3.2 mm.
[0014] Preferably, a chamfer is provided at the opening of the second assembly hole.
[0015] Preferably, the inner diameter dimension of the second assembly hole is larger than the outer diameter dimension of the column body.
[0016] The beneficial effects of the cover plate assembly provided by the present utility model: By means of threaded connection between the pole column and the connection block, the installation and fixation of the pole column and the connection block are completed, and by screwing the pole column in the direction towards the connection block, the terminal block can fit and abut against the bottom surface of the connection pin, and can continue to clamp the connection pin between the terminal block and the substrate, thereby realizing the fixed connection between the connection pin and the pole column, and also ensuring the airtightness between the pole column and the connection pin. In this way, it is no longer necessary to use welding to fix the pole column and the connection pin, thus simplifying the process flow and improving the production efficiency. In addition, only by screwing out the pole column and loosening the connection between the components, the faulty components can be replaced and repaired, avoiding the scrapping of the entire cover plate assembly, and thus also being able to save the replacement cost.
[0017] The second object of the present utility model is to provide a battery. By using the above-mentioned cover plate assembly, the operation of welding the pole column and the connection pin can be omitted, thereby simplifying the process flow, improving the production efficiency, and effectively improving the use quality of the battery.
[0018] To achieve this purpose, the present utility model adopts the following technical solutions:
[0019] The battery includes a battery housing, a battery cell body, and the above-mentioned cover plate assembly. The battery cell body is accommodated in the battery housing, and the cover plate assembly is sealingly connected to the opening of the battery housing and connected to the battery cell body.
[0020] The beneficial effects of the battery provided by the present utility model: In this battery, the above-mentioned cover plate assembly is connected to the opening of the battery housing. Compared with the prior art, the operations of welding the pole column and the connection pin are omitted, thereby simplifying the process flow, improving the production efficiency, and effectively improving the use quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic structural diagram of an existing cover plate assembly;
[0022] Figure 2 is a schematic structural diagram of the cover plate assembly provided by an embodiment of the present utility model;
[0023] Figure 3 is an exploded view of the cover plate assembly provided by an embodiment of the present utility model;
[0024] Figure 4 is a cross-sectional view of the cover plate assembly provided by an embodiment of the present utility model;
[0025] Figure 5 is Figure 4 a partial enlarged view of part A in
[0026] Figure 6 is Figure 5 an exploded schematic diagram of part of the structure in
[0027] In the figure:
[0028] 1. Connection block; 101. Threaded hole; 102. Boss; 11. Positive connection block; 12. Negative connection block;
[0029] 2. Pole column; 201. Terminal seat; 2011. First inclined surface; 2012. Flat part; 202. Column body; 2021. Assembly part; 2022. Relief part; 203. External thread section; 21. Positive pole column; 22. Negative pole column;
[0030] 3. Substrate; 31. First assembly hole;
[0031] 4. Connection pin; 401. Second assembly hole; 4011. Second inclined surface; 402. Chamfer; 403. First connection part; 404. Second connection part; 41. Positive connection pin; 42. Negative connection pin;
[0032] 51. Positive upper plastic part; 52. Negative upper plastic part;
[0033] 61. Plastic part under the positive electrode; 62. Plastic part under the negative electrode;
[0034] 7. Sealing ring;
[0035] 8. Explosion-proof valve structure. Detailed implementation manners
[0036] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.
[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.
[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", and "left" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, 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 thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.
[0040] Such as Figure 1As shown, in the conventional cover plate assembly, the connection block 1 is first riveted to the pole column 2 to fix and clamp other components between the connection block 1 and the pole column 2, and then the pole column 2 and the connection pin 4 are laser welded. This not only makes the manufacturing process complex, increases the production cost, but also easily causes various quality problems such as welding holes, false soldering, explosion, and welding deviation between the pole column 2 and the connection pin 4, as well as problems such as unqualified pulling force of the connection pin 4 and insufficient penetration depth after welding, making the replacement cost of the cover plate assembly high and the production quality difficult to meet the actual use requirements.
[0041] To solve the technical problems existing in the existing cover plate assembly, this embodiment provides a cover plate assembly that can improve the connection firmness between the connection block 1 and the connection pin 4, thereby facilitating cost savings in replacement and bringing stronger market competitiveness.
[0042] Combined Figures 2 to 6 As shown, the cover plate assembly provided in this embodiment includes a substrate 3, a connection block 1, a connection pin 4, and a pole column 2. Among them, a connection block 1 is provided on the top of the substrate 3, a connection pin 4 is provided on the bottom of the substrate 3, and a first assembly hole 31 is opened on the substrate 3; a threaded hole 101 is opened on the connection block 1; a second assembly hole 401 is opened on the connection pin 4; the pole column 2 includes a terminal seat 201 and a column body 202, the column body 202 is provided on the terminal seat 201, and an external thread section 203 is provided on the column body 202. The column body 202 passes through the first assembly hole 31 and the second assembly hole 401 and is threadedly connected to the connection block 1. The top surface of the terminal seat 201 is attached to and presses against the bottom surface of the connection pin 4 to press the connection pin 4 between the terminal seat 201 and the substrate 3.
[0043] It can be seen that in this embodiment, the pole column 2 and the connection block 1 are installed and fixed by threadedly connecting the pole column 2 and the connection block 1. And by screwing the pole column 2 in the direction towards the connection block 1, the terminal seat 201 can be attached and abutted against the bottom surface of the connection pin 4, and the connection pin 4 can continue to be clamped between the terminal seat 201 and the substrate 3, thereby realizing the fixed connection between the connection pin 4 and the pole column 2 and ensuring the airtightness between the pole column 2 and the connection pin 4. In this way, it is no longer necessary to use welding to fix the pole column 2 and the connection pin 4, thus simplifying the process flow, improving the production efficiency, and eliminating the technical problems of low production quality and poor safety and reliability caused by welding. In addition, only by selecting the pole column 2 and loosening the connection between the components, the problematic components can be replaced and repaired, avoiding the scrapping of the entire cover plate assembly, thereby also being able to save the replacement cost and greatly improving the market competitiveness of this cover plate assembly.
[0044] In this embodiment, referring to Figure 3As shown, the substrate 3 is made of light aluminum sheet, which is light and has good durability. A first assembly hole 31 is respectively provided at both ends of the substrate 3; the connection block 1 includes a positive connection block 11 and a negative connection block 12, and threaded holes 101 are provided on both the positive connection block 11 and the negative connection block 12; the connection pins 4 include a positive connection pin 41 and a negative connection pin 42, and second assembly holes 401 are provided on both the positive connection pin 41 and the negative connection pin 42; the pole columns 2 include a positive pole column 21 and a negative pole column 22, and the positive pole column 21 and the negative pole column 22 have the same structure and both have an external thread section 203, so that both the positive pole column 21 and the negative pole column 22 in the cover assembly are fixedly connected to the positive connection block 11 and the negative connection block 12 by means of threaded connection, thereby effectively improving the production quality and use reliability of the cover assembly.
[0045] For the convenience of description, in the following, the positive pole column 21 on the substrate 3 and multiple components connected to the positive pole column 21 will be taken as examples for illustration.
[0046] Specifically, in combination with Figures 4 to 6 As shown, in this embodiment, a boss 102 is provided on the surface of the positive connection block 11 close to the substrate 3. The boss 102 has the above-mentioned threaded hole 101. The boss 102 passes through the first assembly hole 31 and is threadedly connected to the column body 202. The provision of the boss 102 increases the thread length of the threaded hole 101 on the positive connection block 11, which in turn helps to provide a more firm fixation for the positive connection block 11 and the positive pole column 212, ensuring the stability of the connection between the positive pole column 212 and the positive connection block 11.
[0047] Specifically, referring to Figure 6 As shown, in this embodiment, on the positive connection pin 41, a chamfer 402 is provided at the opening of the second assembly hole 401 to eliminate the sharp corner of the second assembly hole 401, so that when the positive pole column 212 is screwed in or out, the wear between the terminal block 201 and the positive connection pin 41 can be reduced, ensuring the use strength of the positive connection pin 41.
[0048] Further, in this embodiment, both the positive connection pin 41 and the negative connection pin 42 include a first connection portion 403 and a second connection portion 404. One end of the first connection portion 403 is connected to one end of the second connection portion 404 to form an L-shaped structure. The first connection portion 403 is used to connect to the positive electrode post 212, and a second assembly hole 401 is penetrated through the surface of the first connection portion 403. The second connection portion 404 is used to connect to the battery cell body. Through the above arrangement, the L-shaped positive connection pin 41 can connect the positive electrode tabs at different positions on the battery cell body to the positive electrode post 212, and the L-shaped negative connection pin 42 also functions to connect the negative electrode tabs at different positions on the battery cell body to the negative electrode post 222, thereby reasonably utilizing the internal space of the battery housing and improving the space utilization rate inside the single battery.
[0049] Furthermore, in this embodiment, the inner diameter dimension of the second assembly hole 401 is larger than the outer diameter dimension of the column body 202, so as to facilitate the column body 202 to pass through the second assembly hole 401 and at the same time reduce the wear of the outer thread section 203 on the column body 202 to the inner side wall of the second assembly hole 401.
[0050] Specifically, referring to Figure 6 As shown, in this embodiment, the column body 202 includes an assembly portion 2021 and a relief portion 2022. An outer thread section 203 is provided on the assembly portion 2021, and the relief portion 2022 is located between the terminal seat 201 and the assembly portion 2021 to ensure the cutting quality of the outer thread section 203.
[0051] In this embodiment, the thread length range of the outer thread section 203 on the assembly portion 2021 is 2 - 3 mm. For example, it can be 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm. If the thread length of the outer thread section 203 is less than 2.0 mm, it is likely to result in poor firmness between the positive electrode post 212 and the positive connection block 11 and easy loosening. If the thread length of the outer thread section 203 is greater than 3.0 mm, there will be a problem of inconvenient disassembly of the positive electrode post 212. Therefore, those skilled in the art can adjust the thread length of the outer thread section 203 according to the actual situation on the basis of ensuring the assembly comfort, and the present invention does not limit this.
[0052] Specifically, in combination with Figure 5 and Figure 6As shown in the figure, in this embodiment, the outer sidewall of the terminal block 201 has a first inclined surface 2011, and the inner sidewall of the second assembly hole 401 has a second inclined surface 4011. The inclination angles of the first inclined surface 2011 and the second inclined surface 4011 are the same. After the positive electrode post 212 is fixedly connected to the positive electrode connection block 11, the first inclined surface 2011 can be abutted against the second inclined surface 4011 to press the positive electrode connection pin 41 on the substrate 3. Through the arrangement of the first inclined surface 2011 and the second inclined surface 4011, on the one hand, the positive electrode connection pin 41 can still be pressed tightly on the substrate 3 by the positive electrode post 212, ensuring the tensile strength of the positive electrode connection pin 41; on the other hand, the terminal block 201 can be embedded in the second assembly hole 401, preventing the terminal block 201 from protruding from the lower surface of the positive electrode connection pin 41, thereby reducing the space occupancy rate of the cover plate assembly and further contributing to increasing the energy density of the entire single battery.
[0053] Optionally, the inclination angle range of the first inclined surface 2011 and the second inclined surface 4011 is 20° to 60°. For example, the inclination angles of the first inclined surface 2011 and the second inclined surface 4011 can be 20°, 30°, 40°, 50°, 60°. It should be noted that if the inclination angles of the two are less than 20°, the thickness of the terminal block 201 will be relatively thin. When performing a tensile test on the positive electrode connection pin 41, the terminal block 201 is easily broken and deformed, resulting in the scrapping of the positive electrode post 212 and increasing the use cost; if the inclination angles of the two are greater than 60°, the supporting effect of the first inclined surface 2011 on the second inclined surface 4011 will be reduced, making the positive electrode connection pin 41 still easily pulled off from the positive electrode post 212.
[0054] Optionally, the length range of the first inclined surface 2011 and the second inclined surface 4011 is 3 to 4 mm. For example, the inclined surface lengths of the first inclined surface 2011 and the second inclined surface 4011 can be 3.0 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4.0 mm. It should be noted that if the inclined surface lengths of the two are less than 3.0 mm, the contact area between the first inclined surface 2011 and the second inclined surface 4011 will be reduced, which is not conducive to the support of the terminal block 201 for the positive electrode connection pin 41, and will also increase the force between the positive electrode connection pin 41 and the terminal block 201, easily causing deformation at the contact part between the terminal block 201 and the positive electrode connection pin 41; since the first inclined surface 2011 and the second inclined surface 4011 are rough surfaces, if the inclined surface lengths of the two are greater than 4.0 mm, the friction force between the first inclined surface 2011 and the second inclined surface 4011 will increase, which is not conducive to the screwing-in of the positive electrode post 212 and increases the installation difficulty of the positive electrode post 212.
[0055] Furthermore, in this embodiment, the surface roughness of the first inclined surface 2011 and the second inclined surface 4011 ranges from 1.0 mm to 3.2 mm. For example, the surface roughness of both can be 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm, or 3.2 mm. By defining the surface roughness of both, the sealing performance and assembly quality of the terminal post 2 and the positive connection pin 41 can be ensured, the connection stability between the two can be improved, and it can also avoid the situation where the connection stability is poor due to too small surface roughness of the two, or the installation difficulty caused by too large surface roughness of the two resulting in large assembly resistance of the positive terminal post 212.
[0056] Even further, in this embodiment, a flat surface portion 2012 is further provided on the outer sidewall of the terminal base 201. The flat surface portion 2012 is connected to the first inclined surface 2011, so that the cross-sectional shape of the terminal base 201 is trapezoidal. The setting of the flat surface portion 2012 can facilitate the screwing out of the positive terminal post 212 and reduce the disassembly resistance of the positive terminal post 212.
[0057] Specifically, as shown in combination with Figure 3 , Figure 5 and Figure 6 , the cover assembly further includes an upper plastic part, a lower plastic part, a sealing ring 7, and an explosion-proof valve structure 8. Among them, the upper plastic part includes a positive upper plastic part 51 and a negative upper plastic part 52, and the lower plastic part includes a positive lower plastic part 61 and a negative lower plastic part 62.
[0058] Exemplarily, the cover assembly provided in this embodiment adopts the following assembly method: First, place the positive lower plastic part 61 on the lower surface of the substrate 3, and then fix the positive lower plastic part 61 by ultrasonic hot melting. Then, place the positive upper plastic part 51 on the upper surface of the substrate 3, place the connection block 1 on the positive upper plastic part 51 and fix it. Then, place the sealing ring 7 in the installation groove of the positive lower plastic part 61, place the first connection portion 403 of the positive connection pin 41 in contact with the lower surface of the positive lower plastic part 61. Then, pass the column body 202 of the positive terminal post 212 through the positive connection pin 41, the sealing ring 7, the substrate 3, and the positive upper plastic part 51 in sequence and threadedly connect it to the boss 102 of the positive connection block 11. In this process, the first inclined surface 2011 moves in the direction of the second inclined surface 4011 and finally fits and presses against the second inclined surface 4011 to press the positive connection pin 41 against the lower surface of the positive lower plastic part 61. It can be understood that the installation process of the negative terminal post 222 is the same as that of the positive terminal post 212, so the present invention will not be elaborated here. Finally, install the explosion-proof valve structure 8 in the middle part of the substrate 3. Through the above process, the installation of the cover assembly is completed.
[0059] This embodiment also provides a battery, which includes a battery housing, a battery cell body, and the above-mentioned cover assembly. Among them, the battery cell body is accommodated in the battery housing, the cover assembly is sealingly connected to the opening of the battery housing, and is connected to the tab of the battery cell body through the connection pin 4, and finally the battery housing and the cover assembly are fixedly connected by welding the substrate 3 in the cover assembly to the battery housing. Compared with the prior art, the operation of welding the pole column 2 and the connection pin 4 is eliminated, thereby simplifying the process flow, improving the production efficiency, and effectively improving the use quality of the battery.
[0060] In the description of this specification, the descriptions referring to the terms "some embodiments", "other embodiments", etc. mean 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 invention. In this specification, the schematic representations 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.
[0061] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. Cover plate assembly, characterized in that It includes a substrate (3), a connection block (1), connection pins (4), and a terminal post (2). The connection block (1) is provided on the top of the substrate (3), the connection pins (4) are provided on the bottom of the substrate (3). A first assembly hole (31) is formed in the substrate (3), a second assembly hole (401) is formed in the connection pin (4), and a threaded hole (101) is formed in the connection block (1). The terminal post (2) includes a terminal seat (201) and a column body (202). The column body (202) is provided on the terminal seat (201), and an external thread section (203) is provided on the column body (202). The column body (202) passes through the first assembly hole (31) and the second assembly hole (401) and is threadedly connected to the connection block (1). The top surface of the terminal seat (201) abuts against and presses on the bottom surface of the connection pin (4), so that the connection pin (4) is clamped between the terminal seat (201) and the substrate (3).
2. The cover plate assembly according to claim 1, wherein, A boss (102) protrudes from the bottom of the connection block (1), and the threaded hole (101) is formed in the boss (102). The boss (102) passes through the first assembly hole (31) and is threadedly connected to the column body (202).
3. The cover plate assembly according to claim 1, wherein The column body (202) includes an assembly part (2021) and a relief part (2022). The external thread section (203) is provided on the assembly part (2021), and the relief part (2022) is located between the terminal seat (201) and the assembly part (2021).
4. The cover plate assembly according to claim 1 or 2 or 3, characterized in that, The outer side wall of the terminal seat (201) has a first inclined surface (2011), and the inner side wall of the second assembly hole (401) has a second inclined surface (4011). The inclination angles of the first inclined surface (2011) and the second inclined surface (4011) are the same, and the first inclined surface (2011) abuts against and contacts the second inclined surface (4011) to press the connection pin (4) on the substrate (3).
5. The cover plate assembly according to claim 4, characterized in that The outer side wall of the terminal seat (201) also has a flat part (2012), and the flat part (2012) is connected to the first inclined surface (2011), so that the cross-sectional shape of the terminal seat (201) is trapezoidal.
6. The cover plate assembly according to claim 5, characterized in that The inclination angle range of the first inclined surface (2011) and the second inclined surface (4011) is 20° to 60°.
7. The cover plate assembly according to claim 5, wherein The inclined surface length range of the first inclined surface (2011) and the second inclined surface (4011) is 3 to 4 mm.
8. The cover plate assembly according to claim 7, wherein, The surface roughness range of the first inclined surface (2011) and the second inclined surface (4011) is 1.0 mm to 3.2 mm.
9. The cover plate assembly according to claim 1, characterized in that, A chamfer (402) is provided at the opening of the second assembly hole (401).
10. The cover plate assembly according to claim 1, wherein The inner diameter dimension of the second assembly hole (401) is larger than the outer diameter dimension of the column body (202).
11. A battery, characterized in that, It includes a battery housing, a battery cell body, and a cover plate assembly according to any one of claims 1 to 10. The battery cell body is accommodated in the battery housing, and the cover plate assembly is sealingly connected to the opening of the battery housing and connected to the battery cell body.