Pole structure, cover plate assembly and battery

Abstract

This application relates to the field of power battery technology and provides a terminal post structure, a cover plate assembly, and a battery. The terminal post structure of this application includes a terminal post body and a connector. A groove is provided at the top of the terminal post body along its height, and the connector is disposed in the groove. The terminal post body is made of copper and is used to connect to the tabs of the electrode assembly. The connector is made of aluminum and is used to connect to external conductive components. The terminal post structure described in this application, through the cooperative arrangement of the terminal post body and the connector, uses a copper terminal post body to connect to the tabs and has good corrosion resistance, preventing chemical reactions between the electrolyte and the terminal post that could damage it, thereby ensuring the battery's operational stability. Simultaneously, the use of an aluminum connector for connecting to external conductive components reduces the material cost of the terminal post while meeting conductivity requirements, thus helping to reduce the overall production and processing costs of the battery.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a terminal structure, a cover plate assembly, and a battery. Background Technology

[0002] The battery terminals are key components connecting the internal electrode assembly to the external circuitry, and their performance directly affects the battery's conductivity, safety, and manufacturing cost. Most common terminal structures are made of a single metal material; however, terminals made of a single material struggle to ensure reliable connection to the internal tabs, resistance to electrolyte corrosion, and simultaneously achieve both economic efficiency and safety when connecting to the external circuitry. Summary of the Invention

[0003] In view of this, this application aims to propose a pole structure to reduce production costs.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0005] An electrode post structure includes an electrode post body and a connector; in the height direction of the electrode post body, a groove is provided at the top end of the electrode post body, and the connector is disposed in the groove; the electrode post is made of copper and is used to connect with the electrode tab of an electrode assembly; the connector is made of aluminum and is used to connect with an external conductive component.

[0006] Furthermore, in the height direction of the pole body, the bottom of the pole body has a downwardly extending connecting portion, which is used to connect with the electrode tab.

[0007] Furthermore, the pole body includes a first component having the groove formed thereon, and a second component disposed at the bottom of the first component; the second component includes a transverse plate connected to the first component, and a vertical plate extending downward from the transverse plate in the height direction of the pole body, and the connecting portion is formed by the vertical plate.

[0008] Furthermore, in the height direction of the pole body, the bottom of the first component is provided with a mounting groove, the transverse plate is embedded in the mounting groove and welded to the first component.

[0009] Compared with related technologies, this application has the following advantages:

[0010] (1) The electrode structure described in this application, through the cooperation of the electrode body and the connector, uses a copper electrode body to connect to the tab and has good corrosion resistance, which can prevent the electrolyte from reacting chemically with the electrode to cause damage to the electrode or failure of the connection between the electrode and the tab, thereby ensuring the working stability of the battery. At the same time, the use of an aluminum connector for connection with external conductive parts can reduce the material cost of the electrode while meeting the conductivity requirements, thereby helping to reduce the overall production and processing cost of the battery.

[0011] (2) By setting the connecting part, a connection base is provided for the electrode. At the same time, the connecting part extends downward to ensure that there is sufficient connection area between the electrode and the connecting part to ensure connection strength, and provides sufficient operating space for the connection and fixing of the electrode and the connecting part, which facilitates battery assembly.

[0012] (3) By providing a first component with a groove and a second component with a horizontal plate and a vertical plate, the groove on the first component provides an installation base for the connector, and the horizontal plate can increase the connection area between the first component and the second component to ensure the connection effect between the first component and the second component and improve the structural stability of the pole body. At the same time, the vertical plate can extend downward to ensure that there is sufficient connection area between the electrode tab and the second component to ensure the connection stability between the electrode tab and the pole body.

[0013] (4) By providing a mounting groove at the bottom of the first component for embedding the transverse plate, a stable positioning reference is provided for the assembly of the first and second components, ensuring the accuracy of the assembly position of the second component and preventing the second component from shifting. At the same time, the transverse plate is welded to the first component, and the mounting groove can cover the transverse plate, increasing the welding area between the first and second components and further enhancing the connection strength between the first and second components.

[0014] Another object of this application is to provide a cover plate assembly comprising a cover plate and a pole structure as described above.

[0015] Furthermore, it also includes a positive electrode post disposed on the cover plate, the electrode post structure constituting a negative electrode post; the bottom of the positive electrode post is provided with a downwardly extending extension portion, the extension portion being used to connect with the electrode tab of the electrode assembly.

[0016] Furthermore, the positive electrode post is made of aluminum and includes a first part and a second part connected to the bottom of the first part;

[0017] In the height direction of the pole body, the second part extends downwards from the first part, and the extended part is disposed on the second part.

[0018] Furthermore, in the height direction of the pole body, the bottom of the first part is provided with an embedding groove, and the second part includes a horizontal plate embedded in the embedding groove and a vertical plate extending to the bottom of the horizontal plate; the vertical plate constitutes an extension portion.

[0019] Furthermore, it also includes two connecting blocks disposed on the cover plate, with the two connecting blocks corresponding one-to-one with the positive terminal and the negative terminal;

[0020] Each of the connecting blocks is provided with a through mounting hole and folded portions located at both ends of the mounting hole along its axial direction. Each folded portion is folded away from the axis of the mounting hole. A reinforcing ring is provided on the outer sleeve of the connecting block. In the height direction of the pole body, the reinforcing ring abuts against the folded portion at the bottom end.

[0021] Compared with related technologies, this application has the following advantages:

[0022] (1) The cover plate assembly described in this application, through the setting of the cover plate and the above-mentioned electrode structure, can improve the corrosion resistance of the electrode while ensuring the conductivity of the electrode, thus ensuring the working stability of the cover plate assembly and the battery as a whole. Furthermore, by using aluminum connectors, the material cost of the cover plate assembly can be reduced, thereby helping to reduce the overall production and processing cost of the battery.

[0023] (2) By setting a positive terminal post on the cover plate and making the terminal post structure form a negative terminal post, it is convenient to connect the positive and negative terminals of the internal electrode group of the battery, thus realizing the positive and negative terminal connection function of the cover plate assembly. At the same time, by setting the extension part, it is possible to ensure that there is sufficient connection area between the terminal and the extension part to ensure connection strength, and provide sufficient operating space for the connection and fixation of the terminal and the extension part, which facilitates the battery assembly operation.

[0024] (3) By using aluminum positive electrode posts, the material cost of the cover plate assembly can be further reduced, thereby reducing the overall production and processing cost of the battery. In addition, due to the high potential of the positive electrode posts, the corrosion resistance of the positive electrode posts can be guaranteed. At the same time, the first split can ensure the fixing effect of the positive electrode posts on the cover plate and the stable connection with external conductive parts, while the second split can ensure the compatibility of the connection between the extension part of the positive electrode posts and the electrode tabs.

[0025] (4) By using the fitting groove and the horizontal plate together, a stable positioning reference can be provided for the assembly of the first part and the second part, ensuring the positional accuracy of the second part. At the same time, by using the vertical plate to form the extension part, sufficient connection area can be ensured between the electrode tab and the extension part, so as to ensure the electrical connection effect and connection strength between the electrode tab and the positive electrode post.

[0026] (5) By setting a connecting block on the cover plate, an installation base is provided for the positive and negative terminals. The folded part on the connecting block can limit the connection block, thereby preventing the connecting block itself, as well as the positive and negative terminals, from coming off the cover plate, thus improving the installation stability of the positive and negative terminals on the cover plate. At the same time, by setting a reinforcing ring, the reinforcing ring can reinforce the area of ​​the folded part of the cover plate, so as to prevent the folded part from directly abutting the cover plate and causing damage to the cover plate, and further prevent the connecting block from coming off the cover plate.

[0027] Another object of this application is to provide a battery pack having a cover assembly as described above.

[0028] The battery pack described in this application and / or the aforementioned terminal structure and cover assembly have the same technical effects as related technologies, and will not be described in detail here. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a schematic diagram of the overall structure of the pole post structure described in the embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the first and second parts as described in the embodiments of this application;

[0032] Figure 3 for Figure 1 A sectional view at the location shown in AA;

[0033] Figure 4 This is a schematic diagram of the cover plate assembly described in an embodiment of this application;

[0034] Figure 5 for Figure 4 A cross-sectional view at the location shown in BB;

[0035] Figure 6 for Figure 5 A magnified view of the position shown in C;

[0036] Figure 7 This is a schematic diagram of the positive electrode post described in an embodiment of this application;

[0037] Figure 8 This is a schematic diagram of the structure of the first and second parts described in the embodiments of this application;

[0038] Figure 9 This is a schematic diagram of the battery structure described in an embodiment of this application;

[0039] Figure 10 for Figure 9 A cross-sectional view at the location shown in DD;

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Main body of the pole; 101. First part; 1011. Groove; 1012. Mounting groove; 102. Second part; 1021. Horizontal plate; 1022. Vertical plate;

[0042] 2. Connector;

[0043] 3. Cover plate; 301, lower plastic;

[0044] 4. Positive terminal; 401. First component; 4011. Mounting slot; 402. Second component; 4021. Horizontal plate; 4022. Vertical plate;

[0045] 5. Negative terminal;

[0046] 6. Connecting block; 601. Mounting hole; 602. Folding part; 603. Reinforcing ring;

[0047] 7. Upper sealing element;

[0048] 8. Lower seal;

[0049] 9. Housing; 901. Electrode assembly; 902. Electrode tab. Detailed Implementation

[0050] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0052] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Furthermore, in the description of this application, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0054] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0056] An embodiment of the first aspect of this application provides a pole post structure.

[0057] In related technologies, the battery terminals are key components connecting the internal electrode assembly to the external circuitry, and their performance directly affects the battery's conductivity, safety, and manufacturing cost. Most common terminal structures are made of a single metal material; however, terminals made of a single material struggle to ensure reliable connection to the internal tabs, resistance to electrolyte corrosion, and simultaneously achieve both economic efficiency and safety when connecting to the external circuitry.

[0058] In view of this, in order to overcome the shortcomings of related technologies, the pole structure of this embodiment combines... Figure 1 , Figure 2 and Figure 3 As shown, the overall design includes a pole body 1 and a connector 2.

[0059] In the height direction of the electrode body 1, a groove 1011 is provided at the top of the electrode body 1, and the connector is disposed in the groove 1011. The electrode body 1 is made of copper and is used to connect with the electrode tab 902 of the electrode group 901. The connector 2 is made of aluminum and is used to connect with external conductive components.

[0060] Therefore, through the cooperative arrangement of the electrode body 1 and the connector 2, the copper electrode body 1 can connect to the tab 902 and has good corrosion resistance, preventing chemical reaction between the electrolyte and the electrode that could damage the electrode or cause the connection between the electrode and the tab 902 to fail, thus ensuring the battery's operational stability. Meanwhile, the aluminum connector 2 is used for connection to external conductive components, which can reduce the material cost of the electrode while meeting conductivity requirements, thereby helping to reduce the overall production and processing costs of the battery.

[0061] Based on the above general description, specifically, in this embodiment, the groove 1011 on the pole body 1 is oblong, and the connector 2 is a sheet-like structure disposed in the groove 1011. Furthermore, the pole body 1 and the connector 2 can be welded together to ensure the connection effect between the connector 2 and the pole body 1.

[0062] In some of the exemplary implementations, combined with Figure 2 , Figure 10 As shown, in the height direction of the electrode body 1, the bottom of the electrode body 1 has a downwardly extending connecting portion, which is used to connect with the tab 902. By setting the connecting portion, a connection base is provided for the tab 902. At the same time, the downward extension of the connecting portion ensures that there is sufficient connection area between the tab 902 and the connecting portion to ensure connection strength, and provides sufficient operating space for connecting and fixing the tab 902 and the connecting portion, which facilitates the battery assembly operation.

[0063] In specific implementation, the connecting part of this embodiment extends downward and along the extension direction of the groove 1011, that is, the length direction of the cover plate 3, to further ensure that the connecting part has sufficient area for connection with the tab 902.

[0064] In some exemplary embodiments, the pole body 1 includes a first component 101 with a groove 1011 and a second component 102 disposed at the bottom of the first component 101. The second component 102 includes a transverse plate 1021 connected to the first component 101 and a vertical plate 1022 extending downward of the transverse plate 1021 in the height direction of the pole body 1, and the connecting portion is formed by the vertical plate 1022.

[0065] By providing a first component 101 with a groove 1011 and a second component 102 with a horizontal plate 1021 and a vertical plate 1022, the groove 1011 on the first component 101 provides an installation base for the connector 2. The horizontal plate 1021 increases the connection area between the first component 101 and the second component 102, ensuring the connection effect between the first component 101 and the second component 102 and improving the structural stability of the pole body 1. At the same time, the vertical plate 1022 can extend downward to ensure that there is sufficient connection area between the tab 902 and the second component 102, ensuring the connection stability between the tab 902 and the pole body 1.

[0066] In a specific implementation, in this embodiment, the tabs 902 of the internal electrode group 901 of the battery can be connected to one side of the vertical plate 1022. Furthermore, in this embodiment, the opposite sides of the vertical plate 1022 of the second component 102 can be connected to the tabs 902 of two electrode groups 901, facilitating the connection between the terminal post and multiple electrode groups 901. In addition, in this embodiment, the horizontal plate 1021 and the vertical plate 1022 are integrally formed, and the horizontal plate 1021 is formed by bending one end of the vertical plate 1022.

[0067] In some exemplary embodiments, a mounting groove 1012 is provided at the bottom of the first component 101 along the height direction of the pole body 1. A transverse plate 1021 is embedded in the mounting groove 1012 and welded to the first component 101. By providing a mounting groove 1012 at the bottom of the first component 101 for embedding the transverse plate 1021, a stable positioning reference is provided for the assembly of the first component 101 and the second component 102, ensuring the accuracy of the assembly position of the second component 102 and preventing the second component 102 from shifting. At the same time, the transverse plate 1021 is welded to the first component 101, and the mounting groove 1012 can cover the transverse plate 1021, increasing the welding area between the first component 101 and the second component 102, further enhancing the connection strength between the first component 101 and the second component 102.

[0068] The electrode structure of this embodiment adopts the design described above. Through the cooperation of the electrode body 1 and the connector 2, the copper electrode body 1 connects to the tab 902 and has good corrosion resistance, preventing chemical reactions between the electrolyte and the electrode that could damage the electrode or cause the connection between the electrode and the tab 902 to fail, thus ensuring the battery's operational stability. Simultaneously, the aluminum connector 2 is used for connection to external conductive components, which reduces the material cost of the electrode while meeting conductivity requirements, thereby helping to reduce the overall production and processing costs of the battery.

[0069] An embodiment of the second aspect of this application provides a cover plate assembly, which, in terms of overall structure, combines... Figure 4 ,Figure 5 As shown, the cover plate assembly includes a cover plate 3 and a pole post structure as described above disposed on the cover plate 3.

[0070] Therefore, by setting the cover plate 3 and the above-mentioned electrode structure, the conductivity of the electrode can be guaranteed while the corrosion resistance of the electrode can be improved, ensuring the working stability of the cover plate assembly and the battery as a whole. Furthermore, by using aluminum connector 2, the material cost of the cover plate assembly can be reduced, which in turn helps to reduce the overall production and processing cost of the battery.

[0071] Based on the above overall introduction, specifically, in this embodiment, the cover plate 3 has a lower plastic 301 on the side facing the inside of the battery.

[0072] In some exemplary embodiments, the cover assembly further includes a positive terminal 4 disposed on the cover 3, the terminal structure constituting a negative terminal 5. The bottom of the positive terminal 4 has a downwardly extending extension for connecting to the tab 902 of the electrode assembly 901.

[0073] By setting a positive terminal post 4 on the cover plate 3 and making the terminal post structure form a negative terminal post 5, the positive and negative terminals 902 of the internal electrode assembly 901 of the battery can be connected, realizing the positive and negative terminal connection function of the cover plate assembly. At the same time, the setting of the extension portion ensures that there is sufficient connection area between the terminal post 902 and the extension portion to ensure connection strength, and provides sufficient operating space for connecting and fixing the terminal post 902 and the extension portion, facilitating battery assembly operations.

[0074] Combination Figure 7 , Figure 8 As shown, in some exemplary embodiments, the positive electrode post 4 is made of aluminum and includes a first part 401 and a second part 402 connected to the bottom of the first part 401. In the height direction of the electrode post body 1, the second part 402 extends downwards from the first part 401, with the extended portion disposed on the second part 402. By using an aluminum positive electrode post 4, the material cost of the cover assembly can be further reduced, thereby reducing the overall production and processing cost of the battery.

[0075] Furthermore, since the positive electrode post 4 is used to connect to the positive electrode plate of the electrode assembly 901, the positive electrode plate and the positive electrode post 4 have high potentials, making it less likely for the positive electrode post 4 to chemically react with the electrode liquid, thus ensuring the corrosion resistance of the positive electrode post 4. Simultaneously, the first component 401 ensures the fixation of the positive electrode post 4 on the cover plate 3 and the stable connection with external conductive components, while the second component 402 ensures the compatibility of the connection between the extended portion of the positive electrode post 4 and the tab 902.

[0076] In some exemplary embodiments, in the height direction of the pole body 1, the bottom of the first part 401 is provided with an insert groove 4011, and the second part 402 includes a horizontal plate 4021 fitted into the insert groove 4011, and a vertical plate 4022 extending to the bottom of the horizontal plate 4021. The vertical plate 4022 constitutes an extension portion.

[0077] The fitting of the mounting slot 4011 and the horizontal plate 4021 provides a stable positioning reference for the assembly of the first component 401 and the second component 402, ensuring the positional accuracy of the second component 402. Simultaneously, the vertical plate 4022 forms an extension portion, ensuring sufficient connection area between the tab 902 and the extension portion to guarantee the electrical connection effect and strength between the tab 902 and the positive terminal 4.

[0078] Combination Figure 5 , Figure 6 As shown, in some exemplary embodiments, the cover plate assembly further includes two connecting blocks 6 disposed on the cover plate 3, with the two connecting blocks 6 corresponding one-to-one with the positive terminal 4 and the negative terminal 5. Each connecting block 6 is provided with a through mounting hole 601 and folded portions 602 located at both ends of the mounting hole 601 along its axial direction. Each folded portion 602 is folded away from the axis of the mounting hole 601. A reinforcing ring 603 is provided on the outer sleeve of the connecting block 6, and in the height direction of the terminal body 1, the reinforcing ring 603 abuts against the folded portion 602 at the bottom end.

[0079] By providing a connecting block 6 on the cover plate 3, an installation base is provided for the positive terminal 4 and the negative terminal 5. Furthermore, the folded portion 602 on the connecting block 6 serves to limit its movement, preventing the connecting block 6 itself, as well as the positive and negative terminals 4 and 5, from detaching from the cover plate 3, thus improving the installation stability of the positive and negative terminals 4 and 5 on the cover plate 3. Simultaneously, the reinforcing ring 603 reinforces the area of ​​the cover plate 3 corresponding to the folded portion 602, preventing the folded portion 602 from directly contacting the cover plate 3 and causing damage, and further preventing the connecting block 6 from detaching from the cover plate 3.

[0080] In specific implementation, the folded portion 602 at the bottom of the connecting block 6 in this embodiment, that is, the folded portion 602 located inside the battery, is formed by stamping. Specifically, when the connecting block 6 is assembled with the cover plate 3, the folded portion 602 is not yet formed at the bottom of the connecting block 6. When the connecting block 6 is inserted into the cover plate 3 and the folded portion 602 at the top of the connecting block 6 abuts against the top of the cover plate 3, the folded portion 602 of the reinforcing ring 603 abutting against the bottom of the cover plate 3 is formed by stamping at the bottom of the connecting block 6 using corresponding processing equipment, thereby fixing the connecting block 6 to the cover plate 3. Thus, by setting the reinforcing ring 603, damage to the cover plate 3, that is, the lower plastic 301 provided on the cover plate 3, can be prevented by the folded portion 602.

[0081] Furthermore, in this embodiment, an upper sealing element 7 and a lower sealing element 8 are provided between the connecting block 6 and the cover plate 3. The upper sealing element 7 is located between the folded portion 602 at the top of the connecting block 6 and the cover plate 3, and extends upward along the edge of the folded portion 602. The lower sealing element 8 is located radially between the connecting block 6 and the cover plate 3, and between the reinforcing ring 603 and the cover plate 3. The lower sealing element 8 is flush with the lower plastic 301 on the side of the cover plate 3 facing the inner electrode assembly 901 of the battery. The upper sealing element 7 and the lower sealing element 8 seal the gap between the connecting block 6 and the cover plate 3, ensuring the insulation performance between them. Moreover, both the upper sealing element 7 and the lower sealing element 8 in this embodiment can be made of conventional insulating and sealing materials well known to those skilled in the art, such as rubber.

[0082] It is worth noting that, regarding the cover plate assembly of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 4 to 8 As shown, it may include, for example, a cover plate 3 and a pole structure as described above provided on the cover plate 3.

[0083] The cover plate assembly also includes a positive terminal post 4 disposed on the cover plate 3, and the terminal post structure constitutes a negative terminal post 5. The bottom of the positive terminal post 4 has a downwardly extending extension portion, which is used to connect with the tab 902 of the electrode group 901.

[0084] Furthermore, the positive electrode post 4 is made of aluminum and includes a first part 401 and a second part 402 connected to the bottom of the first part 401. In the height direction of the electrode post body 1, the second part 402 extends downwards from the first part 401, with the extension portion disposed on the second part 402. In the height direction of the electrode post body 1, the bottom of the first part 401 has an insert groove 4011, and the second part 402 includes a horizontal plate 4021 fitted into the insert groove 4011 and a vertical plate 4022 extending towards the bottom of the horizontal plate 4021. The vertical plate 4022 constitutes the extension portion.

[0085] In addition, the cover plate assembly also includes two connecting blocks 6 disposed on the cover plate 3, with the two connecting blocks 6 corresponding one-to-one with the positive terminal 4 and the negative terminal 5. Each connecting block 6 is provided with a through mounting hole 601 and a folded portion 602 located at both ends of the mounting hole 601 along its axial direction. Each folded portion 602 is folded away from the axis of the mounting hole 601. A reinforcing ring 603 is provided on the outer sleeve of the connecting block 6. In the height direction of the terminal body 1, the reinforcing ring 603 abuts against the folded portion 602 at the bottom end.

[0086] In the preferred embodiment of the above cover plate assembly, the specific configuration and arrangement of the cover plate 3, positive terminal 4, negative terminal 5, etc. can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the cover plate 3, positive terminal 4, negative terminal 5, etc. can also be referred to the descriptions in the above exemplary embodiments.

[0087] The cover plate assembly of this embodiment adopts the above design. By setting the cover plate 3 and the above-mentioned electrode structure, the conductivity of the electrode is guaranteed, the corrosion resistance of the electrode is improved, the working stability of the cover plate assembly and the battery as a whole is guaranteed, and the material cost of the cover plate assembly can be reduced by using aluminum connector 2, which is conducive to reducing the overall production and processing cost of the battery.

[0088] An embodiment of the third aspect of this application provides a battery, combined with Figure 9 , Figure 10 As shown, the battery is provided with the cover assembly as described above. The battery also includes a housing 9 with an opening at one end. The housing 9 is provided with the electrode group 901 as described above, and the cover assembly is located at the opening of the housing 9.

[0089] In this embodiment, the battery, through the aforementioned cover assembly, can improve the corrosion resistance of the terminal post while ensuring its conductivity, thus guaranteeing the working stability of the cover assembly and the battery as a whole. Furthermore, by using aluminum connector 2, the material cost of the cover assembly can be reduced, thereby helping to reduce the overall production and processing cost of the battery.

[0090] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A pole post structure, characterized in that: It includes the pole body (1) and the connector (2); In the height direction of the pole body (1), the top end of the pole body (1) is provided with a groove (1011), and the connector (2) is disposed in the groove (1011); The electrode body (1) is made of copper and is used to connect to the electrode tab (902) of the electrode group (901). The connector (2) is made of aluminum and is used to connect to the external conductive parts.

2. The pole post structure according to claim 1, characterized in that: In the height direction of the pole body (1), the bottom of the pole body (1) has a downwardly extending connecting portion, which is used to connect with the electrode tab (902).

3. The pole post structure according to claim 2, characterized in that: The pole body (1) includes a first component (101) having the groove (1011) formed thereon, and a second component (102) disposed at the bottom of the first component (101). The second component (102) includes a transverse plate (1021) connected to the first component (101) and a vertical plate (1022) extending below the transverse plate (1021) in the height direction of the pole body (1), the connecting portion being formed by the vertical plate (1022).

4. The pole post structure according to claim 3, characterized in that: In the height direction of the pole body (1), the bottom of the first component (101) is provided with a mounting groove (1012), and the transverse plate (1021) is embedded in the mounting groove (1012) and welded to the first component (101).

5. A cover plate assembly, characterized in that: Includes a cover plate (3) and a pole structure provided on the cover plate (3) according to any one of claims 1 to 4.

6. The cover plate assembly according to claim 5, characterized in that: It also includes a positive electrode post (4) disposed on the cover plate (3), the electrode post structure constituting a negative electrode post (5); The bottom of the positive electrode post (4) is provided with a downwardly extending portion, which is used to connect with the tab (902) of the electrode group (901).

7. The cover plate assembly according to claim 6, characterized in that: The positive electrode post (4) is made of aluminum and includes a first part (401) and a second part (402) connected to the bottom of the first part (401). In the height direction of the pole body (1), the second part (402) extends downward of the first part (401), and the extended part is disposed on the second part (402).

8. The cover plate assembly according to claim 7, characterized in that: In the height direction of the pole body (1), the bottom of the first part (401) is provided with an insert groove (4011), and the second part (402) includes a horizontal plate (4021) embedded in the insert groove (4011) and a vertical plate (4022) extending to the bottom of the horizontal plate (4021). The vertical plate (4022) constitutes an extension.

9. The cover plate assembly according to any one of claims 6 to 8, characterized in that: It also includes two connecting blocks (6) disposed on the cover plate (3), and the two connecting blocks (6) are disposed one-to-one with the positive terminal (4) and the negative terminal (5); Each of the connecting blocks (6) is provided with a through mounting hole (601) and a folded portion (602) located at both ends of the mounting hole (601) along the axis. Each of the folded portions (602) is folded away from the axis of the mounting hole (601). A reinforcing ring (603) is provided on the outer sleeve of the connecting block (6), and the reinforcing ring (603) abuts against the folded portion (602) at the bottom end in the height direction of the pole body (1).

10. A battery, characterized in that: The battery is provided with a cover plate assembly as described in any one of claims 5 to 9.

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