Cover assembly and battery

Abstract

The utility model relates to battery technology field especially relates to a cover plate assembly and battery. The utility model discloses a cover plate assembly including cover plate, along the multiple pole post of interval of being equipped with on cover plate in preset direction, with riveting block that the one -to -one arrangement of pole post is corresponded to and is equipped with between multiple riveting block and cover plate first insulating portion, each riveting block all is equipped with the riveting hole of through arrangement, and pole post includes board body part and column body part, and board body part and riveting block are located respectively on the two opposite sides of cover plate, and column body part is worn and is equipped in riveting hole, and is riveted and is connected with riveting block. The utility model discloses a cover plate assembly, through along the multiple pole post of interval of being equipped with on cover plate in preset direction, and setting up riveting block that the one -to -one arrangement of pole post is corresponded to, thus, can make single pole post and corresponding riveting block rivet alone, can effectively guarantee the flatness after riveting of riveting block, thereby is favorable to the full play of battery performance.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate assembly. This utility model also relates to a battery using this cover plate assembly. Background Technology

[0002] With the increasing maturity of lithium-ion battery technology, it has been widely used as an important power battery in the field of electric vehicles. Lithium-ion batteries are mainly composed of lithium-ion cells, and the cell cover structure is a key component of the lithium-ion cell, mainly including the cover, riveting blocks, and insulating components.

[0003] In existing battery structures, to improve overcurrent capacity during fast charging, the battery top cover typically features two or more terminals. However, usually, the riveting block and the upper plastic layer are separate structures. After the top cover is riveted, the flatness of the riveting block is difficult to guarantee under the combined riveting pressure of the two terminals. This negatively impacts the precision of series or parallel welding between multiple batteries, hindering the full realization of battery performance. Utility Model Content

[0004] In view of this, the present invention aims to provide a cover plate assembly to effectively ensure the flatness of the riveting blocks after riveting, thereby facilitating the full performance of the battery.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A cover plate assembly is applied to a battery casing, including a cover plate, a plurality of terminals spaced apart on the cover plate along a predetermined direction, riveting blocks corresponding to each of the terminals, and a first insulating portion disposed between the plurality of riveting blocks and the cover plate.

[0007] Each of the riveting blocks is provided with a through riveting hole. The pole includes a plate part and a column part. The plate part and the riveting block are respectively located on two opposite sides of the cover plate. The column part passes through the riveting hole and is riveted to the riveting block.

[0008] Furthermore, the poles are two poles spaced apart along the preset direction, and the rivet blocks are two poles corresponding to each other; the first insulating part includes an upper plastic sandwiched between the two rivet blocks and the cover plate.

[0009] Furthermore, the upper plastic has a positioning notch at at least one end in the preset direction, and the positioning notch is used for the positioning protrusion of the connector to be inserted, and the connector is used to connect the adjacent cover plate assembly.

[0010] Furthermore, each of the riveting blocks is elongated, and the riveting hole is eccentrically positioned along the length of the riveting block; and / or, the riveting hole is a round hole.

[0011] Furthermore, the upper plastic has a groove and a dividing rib disposed in the groove, the dividing rib dividing the groove into two sub-grooves arranged sequentially along the preset direction; the sub-grooves are arranged one-to-one with the riveting blocks, and the riveting blocks are embedded in the corresponding sub-grooves.

[0012] Furthermore, the upper plastic is elongated, and the length direction of the upper plastic is the same as the preset direction; the groove is formed to correspond to the riveting block.

[0013] Furthermore, the groove has a first sidewall located at both ends of the upper plastic along its length direction, and a second sidewall located at both ends of the upper plastic along its width direction; the thickness of the first sidewall is greater than the thickness of the second sidewall, and the thickness of the first sidewall is greater than the thickness of the dividing rib.

[0014] Furthermore, one side of the upper plastic is provided with a recessed platform located at the opening of the slot, and the recessed platform is provided in a one-to-one correspondence with the slot.

[0015] Furthermore, the end of the riveting block away from the cover plate is provided with a recess, which is connected to the riveting hole; a cover is provided inside the recess to cover the column part.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The cover plate assembly of this utility model has multiple poles spaced apart along a preset direction on the cover plate, and a riveting block corresponding to each pole. In this way, each pole can be riveted to the corresponding riveting block individually, which can effectively ensure the flatness of each riveting block after riveting, thereby facilitating the full performance of the battery.

[0018] The poles are two spaced apart along a preset direction, and the rivet blocks are also two corresponding to the poles. In this way, the flatness of the rivet blocks after riveting can be effectively guaranteed while ensuring the current carrying capacity of the rivet blocks. The first insulating part includes an upper plastic sandwiched between the two rivet blocks and the cover plate, which can reduce processing costs and provide better insulation.

[0019] The upper plastic has a positioning notch at at least one end in a preset direction for the positioning protrusion of the connector to be inserted, and the connector is used to connect adjacent cover assemblies. With this configuration, the positioning notch and the positioning protrusion can effectively ensure the positioning effect of the connector when connected to the cover assembly, which is conducive to improving the connection accuracy of multiple cover assemblies, reducing problems such as poor contact or poor welding caused by connection deviation, and is conducive to the full utilization of battery performance.

[0020] Each rivet block is designed as a long strip, and the rivet holes are eccentrically positioned along the length of the rivet block. The rivet holes are round. In this way, the long strip shape of the rivet block can provide a larger connection area, which is conducive to ensuring the current carrying capacity of the rivet block. The eccentrically positioned rivet holes can also provide sufficient connection area for the connection of palladium sheets while ensuring the current carrying capacity of the rivet block, thereby improving the connection strength of the palladium sheets. The round rivet holes are easy to process and position, which can effectively ensure the dimensional accuracy and shape accuracy of the rivet holes, thereby improving the riveting quality.

[0021] A groove is set on the upper plastic, and a dividing rib is set in the groove to divide the groove into two sub-grooves arranged in a predetermined direction. The sub-grooves correspond one-to-one with the riveting blocks, and the riveting blocks are embedded in the corresponding sub-grooves. In this way, the positioning of the riveting blocks embedded in each sub-groove can be accurately guaranteed, while strengthening the structural strength of the upper plastic and avoiding the risk of plastic cracking due to material expansion during the riveting process.

[0022] The upper plastic is made into a long strip with the same length direction as the preset direction, and the groove is set according to the corresponding rivet block. In this way, the bottom of the groove will also have a through hole corresponding to the rivet hole on the rivet block, so as to facilitate the pole to pass through. It can also make the shape of the groove fit the rivet block, thus achieving a better positioning effect and making full use of space. While ensuring the connection stability, it is also conducive to the compact design of the cover plate assembly.

[0023] The groove has a first sidewall located at both ends of the upper plastic along its length and a second sidewall located at both ends of the upper plastic along its width. The thickness of the first sidewall is greater than the thickness of the second sidewall, and the thickness of the first sidewall is greater than the thickness of the partition rib. In this way, while ensuring the insulation of the upper plastic, it can also provide sufficient structural strength, effectively preventing the upper plastic from cracking due to material expansion when the eccentrically set riveting holes are riveted to the pole.

[0024] One side of the upper plastic is provided with a recessed platform at the slot opening, and the recessed platform is set one-to-one with the slot. In this way, the rivet block can be provided with a clear installation position, which can effectively ensure that it can be quickly embedded into the slot during assembly. This can reduce assembly errors, improve assembly speed, and reduce the possibility of foreign objects entering through the gap between the upper plastic and the rivet block, which is beneficial to improving the battery's sealing performance.

[0025] The end of the rivet block away from the cover plate is provided with a groove connected to the rivet hole, and a cover is provided in the groove to cover the column part. The cover can effectively isolate the electrode from the external electrolyte, moisture and oxygen, thereby effectively preventing the electrode from oxidation and improving the overall performance of the battery.

[0026] Another objective of this utility model is to provide a battery in which the aforementioned cover assembly is provided on the battery casing.

[0027] The battery described in this utility model, by setting the above-mentioned cover plate assembly, can effectively avoid problems such as poor connection and increased internal resistance of the battery caused by insufficient flatness of the rivet block, thereby facilitating the full utilization of battery performance and improving the overall performance of the battery. Attached Figure Description

[0028] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the cover plate assembly described in an embodiment of the present utility model;

[0030] Figure 2 This is an exploded view of the cover plate assembly described in an embodiment of the present utility model;

[0031] Figure 3 This is a cross-sectional view of the cover plate assembly described in an embodiment of the present utility model;

[0032] Figure 4 for Figure 3 Schematic diagram of the structure at point A;

[0033] Figure 5 This is a schematic diagram of the structure of the upper plastic as described in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the riveting block described in an embodiment of the present utility model;

[0035] Figure 7 This is a schematic diagram of the pole structure described in an embodiment of the present utility model;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Cover plate;

[0038] 2. Pole post; 21. Column part; 22. Plate part;

[0039] 3. Riveting block; 31. Riveting hole; 311. First part; 312. Second part; 313. Countersunk groove;

[0040] 4. Apply plastic; 41. Positioning notch; 42. Groove; 421. Dividing rib; 422. Slot; 43. Through hole; 44. First side wall; 45. Second side wall; 46. Recessed platform;

[0041] 5. Cover; 6. Lower plastic; 7. Seal. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0043] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0045] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] In existing battery structures, to improve overcurrent capacity during fast charging, the battery top cover typically has two or more terminals 2. However, usually, the riveting block 3 and the upper plastic 4 are separate structures. After the top cover is riveted, the flatness of the terminals 2 and the riveting block 3 is difficult to guarantee under the combined effect of riveting pressure. This negatively impacts the accuracy of series or parallel welding between multiple batteries, hindering the full utilization of battery performance.

[0048] In view of this, this embodiment specifically proposes a cover plate assembly to effectively ensure the flatness of the riveting block 3 after riveting, thereby facilitating the full utilization of battery performance. In terms of the overall structure, as... Figures 1 to 7 As shown, the battery includes a cover plate 1, multiple terminal posts 2 spaced apart on the cover plate 1 along a predetermined direction, riveting blocks 3 corresponding to each terminal post 2, and a first insulating portion disposed between the multiple riveting blocks 3 and the cover plate 1. Each riveting block 3 has a through riveting hole 31. The terminal post 2 includes a plate portion 22 and a column portion 21. The plate portion 22 and the riveting block 3 are located on opposite sides of the cover plate 1, respectively. The column portion 21 passes through the riveting hole 31 and is riveted to the riveting block 3. The advantage of this arrangement is that it allows each terminal post 2 to be riveted to the riveting block 3 individually, effectively ensuring the flatness of each riveting block 3 after riveting, thus facilitating the full utilization of battery performance.

[0049] Furthermore, the column portion 21 passes through the cover plate 1 and is riveted to the riveting block 3, tightly integrating the electrode post 2 and the riveting block 3 into a single unit. This enhances the connection strength and stability between the two. The riveting connection method also effectively reduces the contact resistance between the electrode post 2 and the riveting block 3, minimizing energy loss during transmission, improving the battery's energy transfer efficiency, and ultimately enhancing the battery's output performance. When the cover plate 1 structure is applied to the battery casing, the plate portion 22 is typically located inside the battery casing.

[0050] Additionally, it should be noted that the preset direction mentioned in this embodiment refers to the length direction of the cover plate assembly in this embodiment.

[0051] In this embodiment, as a preferred implementation, such as Figure 1 and Figure 3 As shown, there are two pole posts 2 spaced apart along a preset direction, and two riveting blocks 3 corresponding to each pole post 2. The first insulating part includes an upper plastic 4 sandwiched between the two riveting blocks 3 and the cover plate 1. The advantage of this arrangement is that it can effectively ensure the flatness of the riveting blocks 3 after riveting while ensuring the current carrying capacity of the riveting blocks 3. The first insulating part, including the upper plastic sandwiched between the two riveting blocks 3 and the cover plate, can reduce processing costs and has a better insulation effect.

[0052] Furthermore, in specific implementations, there can be multiple pole posts 2, and multiple riveting blocks 3 corresponding to each pole post 2. This increases the total cross-sectional area of ​​the pole posts 2, thereby improving the current carrying capacity of the battery cell. Similarly, there can be multiple upper plastic sheets 4 corresponding to each riveting block 3. This ensures the insulation capacity of the upper plastic sheets 4 while effectively preventing cracking of the upper plastic sheets 4 due to material expansion during the riveting of the pole posts 2 and riveting blocks 3.

[0053] In addition, the electrode post 2 in this embodiment can be made of copper-aluminum composite material, copper material or aluminum material. Furthermore, when this cover plate assembly is used as a negative electrode cover plate, the electrode post 2 can be made of aluminum material or copper-aluminum composite material. When this cover plate assembly is used as a positive electrode cover plate, the electrode post 2 can be made of aluminum material.

[0054] In this embodiment, as a preferred implementation, such as Figure 1 and Figure 3 As shown, the upper plastic 4 has a positioning notch 41 at at least one end in a preset direction, and the positioning notch 41 is used for the positioning protrusion of the connector to be inserted. The connector is used to connect adjacent cover assemblies. With this configuration, the positioning notch 41 and the positioning protrusion can effectively ensure the positioning effect of the connector when connected to the cover assembly, which is conducive to improving the connection accuracy of multiple cover assemblies, reducing problems such as poor contact or poor welding caused by connection deviation, and is conducive to the full utilization of battery performance.

[0055] In addition, it should be noted that the connector in this embodiment is a conventional structure used by those skilled in the art. It can not only be used to connect adjacent battery cells, but also as a support for the deployment of sensors.

[0056] In this embodiment, as a preferred implementation, such as Figure 3 and Figure 6 As shown, each rivet block 3 is elongated, and the rivet hole 31 is eccentrically positioned along the length of the rivet block 3. This elongated shape provides a larger connection area, which is beneficial for ensuring the current-carrying capacity of the rivet block 3. The eccentrically positioned rivet hole 31 also provides sufficient connection area for the palladium sheet connection while ensuring the current-carrying capacity of the rivet block 3, thereby improving the connection strength of the palladium sheet. Furthermore, designing the rivet hole 31 as a round hole facilitates easy machining and positioning of the rivet hole 31, effectively ensuring the dimensional and shape accuracy of the rivet hole 31, thus improving the riveting quality.

[0057] In this embodiment, as a preferred implementation, such as Figure 3 and Figure 5 As shown, the upper plastic 4 has a groove 42 and a partition rib 421 disposed in the groove 42. The partition rib 421 divides the groove 42 into two slots 422 arranged sequentially along a preset direction. The slots 422 are arranged in a one-to-one correspondence with the riveting blocks 3, and the riveting blocks 3 are embedded in the corresponding slots 422. In this way, the positioning of the riveting blocks 3 embedded in each slot 422 can be accurately guaranteed, while strengthening the structural strength of the upper plastic 4 and effectively avoiding the risk of cracking of the upper plastic due to material expansion during the riveting process.

[0058] In addition, in specific implementation, the slots 422 can be multiple, corresponding to each pole post 2 and the rivet block 3. This arrangement simplifies the design and ensures the current carrying capacity of the pole post 2 without significantly increasing the manufacturing cost, making it easy to implement in mass production.

[0059] In this embodiment, as a preferred implementation, the following continues... Figure 5 As shown, the upper plastic 4 is a long strip, and the length direction of the upper plastic 4 is the same as the preset direction. The groove 422 is set according to the corresponding rivet block 3. In this way, the bottom of the groove 422 will also have a through hole 43 corresponding to the rivet hole 31 on the rivet block 3, so that the pole post 2 can pass through. It can also make the shape of the groove 422 fit the rivet block 3, so as to have a good positioning effect and make full use of space. While ensuring the connection stability, it is conducive to the compact design of the cover plate assembly.

[0060] Furthermore, in this embodiment, as Figure 2 As shown, the upper plastic 4 mainly serves to insulate the rivet block 3 from the cover plate 1. Specifically, the upper plastic 4 also has a protrusion extending towards one side of the cover plate 1, and the protrusion is arranged circumferentially along the clearance hole. Simultaneously, corresponding to the protrusion, one end of the cover plate 1 has a recess 313 into which the protrusion is inserted. Therefore, the upper plastic 4 not only provides a positioning effect but also further improves the insulation effect between the rivet block 3 and the cover plate 1.

[0061] In addition, in specific implementation, such as Figure 3 and Figure 4 As shown, a lower plastic 6 is sandwiched between the plate portion 22 of the electrode post 2 and the cover plate 1. The lower plastic 6 is attached to the cover plate 1 and has a groove 42 adapted to the plate portion 22 of the electrode post 2. Furthermore, the plate portion 22 of the electrode post 2 is embedded in the groove 42, thereby improving the stability of the lower plastic 6 and further enhancing the insulation effect between the electrode post 2 and the cover plate 1.

[0062] In this embodiment, as a preferred implementation, such as Figure 5 As shown, the groove 42 has first sidewalls 44 located at both ends along the length of the upper plastic 4, and second sidewalls 45 located at both ends along the width of the upper plastic 4. The thickness of the first sidewall 44 is greater than the thickness of the second sidewall 45, and the thickness of the first sidewall 44 is greater than the thickness of the partition rib 421. This arrangement ensures the insulation of the upper plastic 4 while providing sufficient structural strength, effectively preventing the upper plastic 4 from cracking due to material expansion when the eccentrically positioned riveting hole 31 is riveted to the pole post 2.

[0063] Furthermore, in specific implementation, the thickness of the second sidewall 45 is preferably set between 1.5mm and 4mm. This effectively avoids insufficient structural strength to support the rivet block 3 due to insufficient thickness of the second sidewall 45, and also effectively avoids shrinkage of the injection molded part due to excessive thickness of the second sidewall 45, which could affect the dimensions of the upper plastic 4. Similarly, the thickness of its partition rib 421 is preferably set between 0.5mm and 4mm to effectively avoid the same problem as the second sidewall 45. The first sidewall 44 can refer to existing structures, and only needs to meet the requirements of insulation performance and support strength for the rivet block 3. The upper plastic 4 in this embodiment can be made of materials well known to those skilled in the art, and any material that can meet the insulation performance requirements of the rivet block 3 and the cover plate 1 is acceptable, which will not be elaborated further.

[0064] In addition, it should be noted that the distance between the edge of the rivet hole 31 and the first side wall 44 and the second side wall 45 in this embodiment should be greater than 1mm to ensure the strength of the injection molded part and prevent the upper plastic 4 from cracking due to material expansion when riveting the pole post 2 and the rivet block 3.

[0065] In this embodiment, as a preferred implementation, it is also as follows: Figure 5 As shown, a recessed platform 46 is provided on one side of the upper plastic 4 at the opening of the slot 422, and the recessed platform 46 is set one-to-one with the slot 422. This arrangement provides a clear installation position for the rivet block 3, effectively ensuring that it can be quickly and accurately embedded into the slot 422 during assembly. This reduces assembly errors, increases assembly speed, and reduces the possibility of debris entering the battery pack through the gap between the upper plastic 4 and the rivet block 3, which is beneficial to improving the battery's sealing performance.

[0066] In addition, the recessed platform 46 can also support the riveting block 3, reduce the force on the cover plate 1 during riveting, and protect the cover plate 1. After the riveting block 3 and the pole post 2 are riveted, the pole post 2 and the riveting block 3 are interlocked. The cooperation between the recessed platform 46 and the riveting block 3 can also improve the stability of the assembly of the riveting block 3 and the pole post 2, which is conducive to improving the safety of the battery.

[0067] In this embodiment, as a preferred implementation, such as Figure 6 As shown, the end of the riveting block 3 furthest from the cover plate 1 is provided with a recess 313, which is connected to the riveting hole 31. A cover 5 covering the post portion 21 is provided within the recess 313. The advantage of this arrangement is that the cover 5 can isolate the post 2 from external electrolyte, moisture, and oxygen, thereby effectively preventing oxidation of the post 2 and improving the overall battery performance. In specific implementations, the cover 5 in this embodiment can be a rubber sheet. Any cover 5 that can isolate the post 2 from external electrolyte, moisture, and oxygen is acceptable.

[0068] Furthermore, in a specific implementation, the riveting hole 31 includes a first portion 311 and a second portion 312 arranged sequentially along its axial direction. The inner diameter of the second portion 312 is larger than that of the first portion 311. The second portion 312 is close to and communicates with the recess 313. Thus, the second portion 312, which is close to and communicates with the recess 313, can provide a larger coverage area for the cover 5, allowing the colloid to more fully cover the gaps in the riveting hole 31 and the recess 313, which is beneficial to improving the overall sealing performance of the battery.

[0069] In addition, such as Figures 2 to 4 As shown, a sealing element 7 is also provided between the post body 21 of the terminal post 2 and the cover plate 1. In this way, it can effectively prevent the post body 21 of the terminal post 2 from contacting the cover plate 1, effectively prevent the cover plate 1 from becoming charged, and effectively prevent the leakage of electrolyte and other substances or the entry of external foreign objects into the battery, which would interfere with the normal operation of the battery, thus improving the safety and reliability of the battery.

[0070] The cover plate assembly of this utility model has multiple pole posts 2 spaced apart on the cover plate 1 along a preset direction, and a riveting block 3 corresponding to each pole post 2. In this way, each pole post 2 and the riveting block 3 can be formed separately, which can effectively ensure the flatness of the riveting block 3 after riveting, thereby facilitating the full performance of the battery.

[0071] Example 2

[0072] This embodiment relates to a battery, the battery casing of which is provided with the cover plate assembly of Embodiment 1. The battery of this embodiment, by providing the cover plate assembly of Embodiment 1 on the battery casing, can effectively ensure the flatness of the riveting blocks 3 after riveting, facilitating the connection stability between individual batteries and effectively avoiding problems such as poor connection and increased internal resistance of the battery due to insufficient flatness of the riveting blocks 3. This is beneficial for fully utilizing battery performance and thus improving the overall performance of the battery.

[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cover assembly, applied to a battery casing, characterized in that: It includes a cover plate, a plurality of poles spaced apart on the cover plate along a preset direction, riveting blocks corresponding to each pole, and a first insulating part disposed between the plurality of riveting blocks and the cover plate; Each of the riveting blocks is provided with a through riveting hole. The pole includes a plate part and a column part. The plate part and the riveting block are respectively located on two opposite sides of the cover plate. The column part passes through the riveting hole and is riveted to the riveting block.

2. The cover plate assembly according to claim 1, characterized in that: The pole post is two pole posts spaced apart along the preset direction, and the rivet block is two pole posts corresponding to each other. The first insulating part includes an upper plastic that is sandwiched between the two riveting blocks and the cover plate.

3. The cover plate assembly according to claim 2, characterized in that: The upper plastic has a positioning notch at at least one end in the preset direction, and the positioning notch is used for the positioning protrusion of the connector to be inserted, and the connector is used to connect the adjacent cover plate assembly.

4. The cover plate assembly according to claim 2, characterized in that: Each of the aforementioned riveting blocks is elongated, and the riveting holes are eccentrically positioned along the length of the riveting block; and / or, The rivet hole is a round hole.

5. The cover plate assembly according to claim 4, characterized in that: The upper plastic has a groove and a dividing rib disposed in the groove, the dividing rib dividing the groove into two sub-grooves arranged sequentially along the preset direction; The slots are provided in a one-to-one correspondence with the riveting blocks, and the riveting blocks are embedded in the corresponding slots.

6. The cover plate assembly according to claim 5, characterized in that: The upper plastic is elongated, and the length direction of the upper plastic is the same as the preset direction. The grooves are formed to correspond to the riveting blocks.

7. The cover plate assembly according to claim 6, characterized in that: The groove has a first sidewall located at both ends in the length direction of the upper plastic and a second sidewall located at both ends in the width direction of the upper plastic; The thickness of the first sidewall is greater than the thickness of the second sidewall, and the thickness of the first sidewall is greater than the thickness of the dividing rib.

8. The cover plate assembly according to claim 6, characterized in that: One side of the upper plastic is provided with a recessed platform located at the opening of the slot, and the recessed platform is set in a one-to-one correspondence with the slot.

9. The cover plate assembly according to any one of claims 1 to 8, characterized in that: The end of the rivet block away from the cover plate is provided with a recess, and the recess is connected to the rivet hole; The settling tank is equipped with a cover that covers the column portion.

10. A battery, characterized in that: The battery is provided with a cover assembly as described in any one of claims 1 to 9.

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