Independent pole and cover plate assembly

Abstract

The utility model relates to the technical field of batteries, in particular to an independent pole and a cover plate assembly, and the independent pole comprises a connecting piece, a pole assembly and an insulating layer, a pole hole is formed in the connecting piece, and the connecting piece is configured to be electrically connected with the cover plate body; the pole assembly is inserted into the pole hole, and the pole assembly is electrically connected with the connecting piece; the insulating layer is arranged between the pole assembly and the connecting piece; wherein the pole assembly comprises a pole body and a riveting block, the riveting block and the pole body are riveted in the thickness direction of the pole body, one side, far away from the pole body, of the riveting block is provided with an extension part, the extension part and the cover plate body are riveted in the thickness direction of the pole body, and the inner end of the riveting block is inserted into the pole hole; according to the independent pole provided by the utility model, the height of the pole can be reduced, so that the energy density of a battery cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an independent electrode post and cover plate assembly. Background Technology

[0002] The rapid advancement of new energy technologies has placed more stringent demands on battery cell technology, especially in terms of improving the space utilization rate of battery cells, which is crucial for enhancing the energy density of battery cells.

[0003] In existing technologies, the riveting structure of the terminals is typically located on the outside of the battery cover. This requires the terminals to protrude significantly outward to accommodate the riveting requirements, resulting in an increased overall height, which is detrimental to improving energy density. Furthermore, battery covers generally employ a one-piece design. While this facilitates installation and maintenance, it leaves considerable redundant space around the terminal assembly, further increasing the overall height of the terminals and indirectly reducing the cell's energy density. It is important to understand that cell energy density is a key indicator of a battery's energy storage capacity per unit volume or mass, directly impacting battery performance, driving range, and the compactness of product design. Therefore, reducing unnecessary space occupation is a crucial technical problem that needs to be addressed in this project to improve cell energy density. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an independent electrode post and cover plate assembly that can reduce the height of the electrode post and thus improve the energy density of the battery cell.

[0005] To achieve the above and other related objectives, this utility model provides an independent pole, comprising:

[0006] A connector having a pole hole and configured to be electrically connected to the cover plate body;

[0007] An electrode assembly is inserted into the electrode hole, and the electrode assembly is electrically connected to the connector, and an insulating layer is provided between the electrode assembly and the connector;

[0008] The pole assembly includes a pole body and a riveting block. The riveting block is riveted to the pole body in the thickness direction of the pole body. An extension is provided on the side of the riveting block away from the pole body. The extension is riveted to the connector in the thickness direction of the pole body. The inner end of the riveting block is inserted into the pole hole.

[0009] As an optional embodiment of this case, the connector includes a stepped portion for engaging with the cover plate body, and the connector is welded to the cover plate body through the stepped portion.

[0010] As an optional embodiment of this case, the insulating layer is ring-shaped and at least covers the sidewall of the pole hole and the area near the edge of the pole hole on the inner and outer sides of the connector, and the inner ring sidewall of the insulating layer abuts against the circumferential outer wall of the riveting block; the insulating layer includes an insulating ring and / or a sealing ring.

[0011] As an optional embodiment of this case, the riveting block is provided with a stepped hole for the pole body to be inserted for riveting, and the outer diameter of the stepped hole is larger than the inner diameter.

[0012] As an optional embodiment of this case, the extension is disposed at the outer end of the riveting block and extends radially along the pole hole, and the edge of the extension extends beyond the outer periphery of the pole hole.

[0013] As an optional embodiment of this case, the outer end face of the pole body is disposed close to the outer side relative to the outer end face of the rivet block, and the outer end face of the pole body constitutes a welding surface for welding the busbar.

[0014] As an optional embodiment of this case, the outer end face of the riveting block is disposed close to the outer side relative to the outer end face of the pole body, and the outer end face of the riveting block constitutes a welding surface for welding the busbar.

[0015] As an optional embodiment of this case, the distance H between the outer end face of the riveting block and the outer end face of the pole body is at least 0.2 mm.

[0016] As an optional embodiment of this case, the pole body and / or riveting block are made of a first conductive material, and the inner end of the pole body and riveting block is provided with a pole base plate made of a second conductive material.

[0017] The sealing ring is disposed between the inner end of the connector and the outer end of the electrode base plate, so that the first conductive material on the inner side of the battery cover is covered and sealed by the second conductive material, the sealing ring and / or the insulating ring.

[0018] To achieve the above and other related objectives, this utility model provides a cover plate assembly, including the aforementioned independent pole and cover plate body;

[0019] The cover plate body is provided with mounting holes, and the edge of the mounting holes is welded to the connector of the independent pole.

[0020] As an optional embodiment of this case, the cover plate body includes an integrally formed first plate, two second plates, and a transition portion connecting the first plate and the second plates;

[0021] The two second plates are spaced apart and are both positioned closer to the outer side relative to the first plate, and the mounting holes are located on the two second plates.

[0022] To achieve the above and other related objectives, this utility model provides a secondary battery, including the aforementioned cover plate assembly, a battery cell, and a housing. The housing is connected to the cover plate assembly to form a cavity for housing the battery cell, which is housed within the cavity, and the battery cell's tabs are electrically connected to the terminal body.

[0023] In summary, this invention designs the battery cover as a separately formed cover body and connector, first assembling the connector, terminal assembly, and insulation layer to form an independent terminal structure, and then welding the connector to the cover body in a subsequent step to form the cover assembly. This reduces unnecessary redundant space, allowing for more or larger capacity cells to be accommodated without increasing external dimensions, thus improving the battery's volumetric energy density. This invention also utilizes part of the height space of the cover assembly by inserting the rivet block into the terminal hole, effectively reducing the overall height of the terminal assembly. This design not only improves battery compactness but also saves space in structural design, thereby increasing the battery's volumetric energy density. Furthermore, the independent terminal is directly electrically connected to the cover body via the connector, simplifying the assembly process and preventing the integrated battery cover from directly connecting to the terminal assembly and hindering welding connections between the inner end of the terminal assembly and other components such as the tabs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an independent pole structure in one embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the cover plate assembly structure in one embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the connector structure in one embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the riveting block structure in one embodiment of the present invention;

[0029] Figure 5This is a three-dimensional structural diagram of the cover plate assembly in the second embodiment of the present utility model;

[0030] Figure 6 for Figure 5 A structural cross-sectional view at point AA;

[0031] Figure 7 This is a cross-sectional view of the cover plate assembly structure in the third embodiment of this utility model;

[0032] Figure 8 This is a schematic diagram of the cover plate assembly structure in the fourth embodiment of the present utility model;

[0033] Figure 9 This is a three-dimensional structural diagram of the cover plate body in one embodiment of the present utility model;

[0034] Figure 10 This is a cross-sectional view of the cover plate body structure in one embodiment of the present utility model;

[0035] Component labeling description: Cover plate body 11, first plate 111, second plate 112, mounting hole 1121, transition part 113, connector 12, pole hole 121, step part 122, pole assembly 2, pole body 21, riveting block 22, extension part 221, step hole 222, outer section 2221, inner section 2222, pole base plate 23, insulating layer 3, insulating ring 31, sealing ring 32, insulating plate 4. Detailed Implementation

[0036] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0037] Please see Figures 1 to 10It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0038] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0039] In the description of this utility model, the terms "inner" and "outer" are based on the battery cavity, that is, the side or end closer to the battery cavity is the inner side or inner end, and the side or end farther from the battery cavity is the outer side or outer end; for example Figure 1 As shown, the outer end is located on the side closest to the top of the cover plate assembly. The thickness direction is... Figure 2 The X direction.

[0040] A secondary battery, also known as a rechargeable battery or energy storage battery, is a battery that can be charged by an external electrical source and release electrical energy when needed. A secondary battery consists of a casing, battery cells, and a cover. The battery cells are housed inside the casing, and the cover is connected to the casing to enclose the battery cells within the casing. The cover typically has terminals, the inner end of which connects to the tabs of the battery cells, while the outer end of the terminals protrudes from the cover and is used to connect to a busbar.

[0041] In existing technologies, the outer ends of the terminals often employ metal riveting structures, such as aluminum riveting structures. These riveting structures are located on the outside of the battery cover to ensure the connection strength and reliability of the terminals. However, this design, while emphasizing connection stability, introduces significant drawbacks: to meet the installation requirements of the riveting structure, the terminals often need to protrude relatively high outwards. This not only increases the overall battery height but also negatively impacts the cell's energy density. Furthermore, in existing technologies, the battery cover is generally a one-piece design. This one-piece design often leaves considerable redundant space around the terminal assembly 2 to ensure ease of installation and maintenance, resulting in a relatively high overall terminal height. This affects the cell's energy density, which refers to the electrical energy stored per unit volume or mass of battery. This parameter directly relates to the battery's performance, range, and overall design compactness.

[0042] Therefore, reducing the overall height and increasing the cell energy density while ensuring the reliability of the terminal connection structure and the ease of cover installation has become a key technical challenge in current rechargeable battery design. Optimizing the structural design of the terminals and cover not only optimizes the internal space of the rechargeable battery but also promotes the increase in cell energy density, thereby improving the overall performance and market competitiveness of the battery. Against this backdrop, new design solutions are urgently needed to meet the growing demand for high-performance, high-density batteries in future electric vehicles and energy storage systems.

[0043] like Figures 1 to 4 As shown, this utility model provides an independent pole, including a connector 12, a pole assembly 2, and an insulating ring layer 3; the connector 12 has a pole hole 121 and is configured to be welded to the cover plate body 11; the pole assembly 2 is inserted into the pole hole 121 and is riveted to the connector 12; the insulating layer 3 is disposed between the pole assembly 2 and the connector 12.

[0044] The pole assembly 2 includes a pole body 21 and a riveting block 22. The riveting block 22 is riveted to the pole body 21 in the thickness direction of the pole body 21. An extension 221 is provided on the side of the riveting block 22 away from the pole body 21. The extension 221 is riveted to the connector 12 in the thickness direction of the pole body 21. The inner end of the riveting block 22 is inserted into the pole hole 121.

[0045] In this case, the connector 12 is first installed together with the electrode assembly 2 and the insulating layer 3 to form an independent electrode. Then, or finally, the connector 12 is welded to the cover plate body 11 or connected with fasteners to form a cover plate assembly. This cover plate assembly is used to cooperate with the housing (not shown) to form a cavity for housing the battery cell. The electrode assembly 2 is electrically connected to the electrode tabs of the battery cell, guiding the input and output terminals of the battery cell to the outside of the housing. Along the Y direction perpendicular to the thickness direction, the cross-section of the connector 12 is circular, elliptical, approximately elliptical, or square; the cross-section of the insulating layer 3 is circular, elliptical, approximately elliptical, or square; and the cross-section of the electrode assembly 2 is circular, elliptical, approximately elliptical, or square. The specific design can be customized according to actual needs.

[0046] In a specific embodiment, both the cover plate body 11 and the connector 12 can be made of metal, such as a plain aluminum plate; the pole assembly 2 can be formed by connecting several parts together, or it can be independently formed from a metal material, such as aluminum. In a specific embodiment, the insulating layer 3 can be made of, for example, plastic and / or rubber; the rivet block 22 is made of a conductive material, such as aluminum.

[0047] This invention designs the battery cover as a separately formed cover body 11 and connector 12. The connector 12, terminal post assembly 2, and insulating layer 3 are first assembled into an independent terminal post structure. Subsequently, the connector 12 is welded to the cover body 11 to form the cover assembly. This reduces unnecessary redundant space, allowing for more or larger capacity cells to be accommodated without increasing external dimensions, thus improving the battery's volumetric energy density. Specifically, by dividing the battery cover into the cover body 11 and connector 12, the design of these two parts can be optimized separately. The connector 12 is specifically used to install the terminal post assembly 2 and insulating layer 3, while the cover body 11 mainly provides overall structural support. This separate design allows each part to be optimized according to its specific function, thereby reducing unnecessary space waste. Furthermore, by inserting the riveting block 22 into the terminal post hole 121, this invention utilizes part of the height space of the connector 12, effectively reducing the overall height of the terminal post assembly 2. This design not only helps improve the compactness of the battery but also saves space in the structural design and increases the flexibility of the overall layout. The thickness direction of the electrode body 21 is the same as the height direction of the battery, which is... Figure 2 The X direction in the equation.

[0048] As an optional embodiment of this case, such as Figure 2 and Figure 3As shown, the connector 12 includes a stepped portion 122 for engaging with the cover plate body 11. The connector 12 is welded to the cover plate body 11 via the stepped portion 122. The specific shape of the stepped portion 122 can be designed according to actual usage requirements and convenience, thereby facilitating subsequent welding connection between the cover plate body 11 and the connector 12, improving connection convenience and structural stability.

[0049] As an optional embodiment of this case, such as Figure 2 and Figure 3 As shown, the insulating layer 3 is ring-shaped, and the insulating layer 3 covers at least the side wall of the pole hole 121 and the area near the edge of the pole hole 121 on the outside of the connector 12, and the inner ring side wall of the insulating layer 3 abuts against the circumferential outer wall of the riveting block 22; the insulating layer 3 includes an insulating ring 31 and / or a sealing ring 32.

[0050] It should be noted that the insulating layer 3 can also cover the area inside the connector 12 near the edge of the terminal hole 121. The insulating layer 3 is set between the terminal assembly 2 and the connector 12 to effectively isolate the current and prevent safety hazards such as short circuits. This design ensures the safety of the battery during operation and improves the reliability of the overall battery system.

[0051] As an optional embodiment of this case, such as Figure 2 and Figure 4 As shown, the riveting block 22 is provided with a stepped hole 222 for the pole body 21 to be inserted and riveted. The outer section 2221 of the stepped hole 222 has a larger diameter than the inner section 2222.

[0052] It should be noted that the pole body 21 is a stepped shaft structure that conforms to the shape of the stepped hole 222. The structural design of the stepped hole 222 forms a stepped surface between the outer section 2221 and the inner section 2222. The stepped surface can effectively bear the riveting force between the pole body 21 and the riveting block 22 in the thickness direction of the pole body 21.

[0053] As an optional embodiment of this case, such as Figure 2 and Figure 4 As shown, the extension 221 is disposed at the outer end of the riveting block 22 and extends radially along the pole hole 121, and the edge of the extension 221 extends beyond the outer periphery of the pole hole 121.

[0054] It should be noted that the fact that the edge of the extension 221 extends beyond the outer periphery of the terminal hole 121 means that the projected outline of the extension 221 in the thickness direction can cover the terminal hole 121 (excluding overlap). In other words, the extension 221 can compress the insulating ring 31 region circumferentially around the terminal hole 121 in the thickness direction of the terminal body 21. This allows the extension 221 to compress the connector 12 region outwards, similar to a riveting effect. Through this compression, the extension 221 firmly fixes the terminal body 21 to the connector 12, enhancing the connection's strength. This design ensures that the connection between the connector 12 and the terminal is not easily loosened, especially under vibration and impact during battery operation, maintaining a stable structure.

[0055] As an optional embodiment of this case, such as Figure 2 or Figure 4 As shown, the inner end face of the rivet block 22 is flush with the inner end face of the connector 12; this ensures that the rivet block 22 shares part of the height space with the connector 12 to the maximum extent, thereby reducing the height of the pole assembly 2 and ensuring a reasonable fit between the rivet block 22 and the connector 12, avoiding intrusion into the inner side of the connector 12.

[0056] like Figure 2 As shown, the pole assembly 2 also includes a pole base plate 23, and the inner ends of the pole body 21 and the riveting block 22 are both connected to the pole base plate 23.

[0057] As an optional embodiment of this case, such as Figure 2 or Figure 6 or Figure 7 As shown, the electrode body 21 and / or the riveting block 22 are made of the first conductive material. The sealing ring 32 is disposed between the inner end of the connector 12 and the outer end of the electrode base plate 23, so that the first conductive material on the inner side of the battery cover is covered and sealed by the second conductive material, the sealing ring 32 and / or the insulating ring 32. When the materials of the electrode body 21, the riveting block 22 and the electrode base plate 23 are different, the corrosion of the galvanic cell can be avoided when the two different conductive materials come into contact with the electrolyte at the same time.

[0058] As an optional embodiment of this case, the first conductor material is aluminum and the second conductive material is copper.

[0059] Furthermore, such as Figure 6 or Figure 7As shown, the distance H between the outer end face of the riveting block 22 and the outer end face of the pole body 21 is at least 0.2 mm. The reason for setting the distance between the outer end face of the riveting block 22 and the outer end face of the pole body 21 to at least 0.2 mm is primarily to balance the reliability of the connection with the overall height of the assembly. During the design process, if the distance between the riveting block 22 and the pole body 21 is too close, slight deformations caused by the connection of the busbar may be transmitted to adjacent components during actual use, leading to riveting failure and affecting the stability and safety of the assembly.

[0060] Conversely, if the spacing is too large, it may increase the overall height of the pole assembly 2, which is detrimental to the compactness of the equipment and the efficiency of installation space utilization. Therefore, setting a spacing of 0.2mm can effectively reduce potential structural problems while maintaining an appropriate height of the assembly and optimizing the overall design. This design concept not only improves product performance but also enhances the operability of the manufacturing and assembly process.

[0061] Example 2, as Figure 5 and Figure 6 As shown, the outer end face of the terminal body 21 is positioned closer to the outer side than the outer end face of the riveting block 22, and the outer end face of the terminal body 21 forms a welding surface for welding the busbar. By positioning the outer end face of the terminal body 21 further outward, ensuring that only the terminal body 21 is connected to the busbar, it is possible to effectively prevent the force on the busbar from being simultaneously transmitted to the riveting block 22. This design reduces the impact of external forces on the riveting area, thereby reducing the risk of connection failure and ensuring the reliability of the battery system.

[0062] Example 3, as Figure 6 As shown, the outer end face of the riveting block 22 is positioned closer to the outer end face of the pole body 21, and the outer end face of the riveting block 22 forms a welding surface for welding the busbar. The non-flush outer end faces of the pole body 21 and the riveting block 22 ensure that only the riveting block 22 is connected to the busbar, preventing the force on the busbar from being simultaneously transmitted to both the pole body 21 and the riveting block 22, thus avoiding riveting failure between the two.

[0063] like Figure 2 , Figure 9 and Figure 10 As shown, this utility model also provides a cover plate assembly, including the aforementioned independent pole and cover plate body 11; the cover plate body 11 is provided with a mounting hole 1121, the edge of the mounting hole 1121 is welded to the connector 12 of the independent pole, it should be understood that the edge of the mounting hole 1121 is adapted to the step portion 222, and the outermost end face of the cover plate body 11 can be flush with the outermost end face of the connector 12.

[0064] As an optional embodiment of this case, such as Figure 2 , Figure 9 and Figure 10 As shown, the cover plate body 11 includes an integrally formed first plate 111, two second plates 112, and a transition portion 113 connecting the first plate 111 and the second plates 112.

[0065] Two second plates 112 are spaced apart, and the entire second plate 112 is positioned further outward relative to the entire first plate 111. Mounting holes 1121 are provided on both second plates 112, and these mounting holes are through holes. Through detailed structural design of the cover plate body 11, the entire cover plate assembly structure can be made more compact.

[0066] It should be noted that, in some embodiments, an insulating plate 4 is provided between the pole base plate 2131 and the cover plate body 11. The insulating plate 4 and the pole base plate 2131 have a receiving cavity for accommodating the tab 101. The pole base plate 2131 has a welding surface for welding the tab 101. The welding surface constitutes one side wall of the receiving cavity. Therefore, in this case, by setting the second plate body 112 to be positioned closer to the outside than the first plate body 111, more space is left for the receiving cavity. This avoids the tab 101 protruding towards the cover plate body 11 after welding, which would cause difficulties in the subsequent installation of the cover plate body 11, the insulating plate 4, etc., thus facilitating the smooth progress of the assembly process.

[0067] Regarding the assembly process of the cover plate assembly: First, the connector 12, the pole assembly 2, and the insulation layer 3 are assembled into one piece to form an independent pole. In the subsequent process, the independent pole passes through the mounting hole 1121 of the cover plate body 11, and the pole base plate 212 is located inside the cover plate body 11, so that the independent pole is assembled with the cover plate body 11. Then, the connector 12 of the independent pole is welded to the cover plate body 11, thereby realizing the assembly of the cover plate assembly.

[0068] This utility model provides a secondary battery, including the aforementioned cover plate body, as well as a battery cell and a casing. The casing is connected to the cover plate body to form a cavity for housing the battery cell. The battery cell is housed in the cavity, and the electrode tabs of the battery cell are electrically connected to the terminal body 21.

[0069] In summary, the above solution, by inserting the rivet block 22 into the terminal hole 121, allows the rivet block 22 to share a portion of the height space with the cover plate body 11, thereby effectively reducing the overall height of the terminal. This design improves the space utilization of the battery, thereby increasing the volumetric energy density of the battery. This optimization not only helps improve battery performance but also meets the requirements for thinner and more compact product designs. Simultaneously, the extension 221 firmly fixes the terminal body 21 to the cover plate body 11, enhancing the connection's strength. This design ensures that the connection between the cover plate body 11 and the terminal is not easily loosened, especially under vibration and impact during battery operation, maintaining a stable structure. The non-flush terminal body 21 and the outer end face of the riveting block 22 can ensure that only one of them is connected to the busbar, avoiding the force on the busbar from being transmitted to the terminal body 21 and the riveting block 22 at the same time, causing the riveting between the two to fail. In this case, the battery cover is designed as a split cover body 11 and connector 12, and the connector 12, the terminal assembly 2, and the insulating layer 3 are assembled to form an independent terminal structure. Then, the connector 12 is welded to the cover body 11 to form a cover assembly, thereby reducing unnecessary redundant space. As a result, more cells or larger capacity cells can be accommodated without increasing the external size, thereby improving the volumetric energy density of the battery.

[0070] In summary, this utility model effectively overcomes some practical problems in the prior art, thus having high utilization value and significance.

[0071] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An independent pole piece, characterized in that, include: A connector having a pole hole and configured to be electrically connected to the cover plate body; An electrode assembly is inserted into the electrode hole, and the electrode assembly is electrically connected to the connector, and an insulating layer is provided between the electrode assembly and the connector; The pole assembly includes a pole body and a riveting block. The riveting block is riveted to the pole body in the thickness direction of the pole body. An extension is provided on the side of the riveting block away from the pole body. The extension is riveted to the connector in the thickness direction of the pole body. The inner end of the riveting block is inserted into the pole hole.

2. The independent pole piece according to claim 1, characterized in that, The connector includes a stepped portion for engaging with the cover plate body, and the connector is welded to the cover plate body via the stepped portion.

3. The independent pole piece according to claim 1, characterized in that, The insulating layer is ring-shaped and covers at least the sidewall of the pole hole and the inner and outer regions of the connector near the edge of the pole hole, and the inner ring sidewall of the insulating layer abuts against the circumferential outer wall of the rivet block; the insulating layer includes an insulating ring and / or a sealing ring.

4. The independent pole piece according to claim 1, characterized in that, The riveting block is provided with a stepped hole for the pole body to be inserted and riveted, and the outer diameter of the stepped hole is larger than the inner diameter.

5. The independent pole piece according to claim 4, characterized in that, The extension is disposed at the outer end of the rivet block and extends radially along the pole hole, with the edge of the extension extending beyond the outer periphery of the pole hole.

6. The independent pole piece according to claim 5, characterized in that, The outer end face of the pole body is positioned close to the outer side relative to the outer end face of the rivet block, and the outer end face of the pole body forms a welding surface for welding the busbar.

7. The independent pole piece according to claim 5, characterized in that, The outer end face of the rivet block is positioned close to the outer end face of the pole body, and the outer end face of the rivet block forms a welding surface for welding the busbar.

8. The independent pole piece according to claim 6 or 7, characterized in that, The distance H between the outer end face of the rivet block and the outer end face of the pole body is at least 0.2 mm.

9. The independent pole piece according to claim 3, characterized in that, The electrode body and / or riveting block are made of a first conductive material, and the inner end of the electrode body and riveting block is provided with an electrode base plate made of a second conductive material. The sealing ring is disposed between the inner end of the connector and the outer end of the pole base plate, so that the first conductive material on the inner side of the connector is covered and sealed by the second conductive material, the sealing ring and / or the insulating ring.

10. A cover plate assembly, characterized in that, Includes the independent pole and cover plate body as described in any one of claims 1-9; The cover plate body is provided with mounting holes, and the edge of the mounting holes is welded to the connector of the independent pole.

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