Battery top cover assembly and battery

Abstract

The utility model relates to battery technical field provides a kind of battery top cover assembly and battery, battery top cover assembly includes: top cover body, is formed with pole hole;First insulating part, first side is connected in top cover body, the second side is formed with baffle, baffle is provided with gap in the area of directly opposite pole hole axial projection;First insulating part is formed with the first through-hole opposite with pole hole;Pole, is arranged in pole hole and first through-hole, and the end of pole is exposed in first through-hole. The battery top cover assembly is directly constrained by setting gap on the baffle of first insulating part and cooperating with fixed mould, and the exposed part of pole end portion can be directly constrained, ensure the coaxial degree of pole and pole hole, first through-hole, reduce artificial adjustment dependence, avoid the deviation caused by assembly deviation of pole, ensure the accuracy of pole and top cover body assembly.

Description

Technical Field

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

[0002] With the widespread application of lithium-ion batteries in new energy vehicles, energy storage systems, and consumer electronics, the reliability and safety of battery structures have become important directions for technological research and development. As one of the main components of battery packaging, the battery top cover's design directly affects the battery's sealing performance, electrical connection stability, and resistance to mechanical shock.

[0003] In traditional battery top cover assemblies, the concentricity of the terminals, upper and lower plastic parts, and top cover relies on manual or complex tooling adjustments. Assembly deviations can easily lead to uneven pressure on the sealing ring, causing problems such as sealing or insulation failure. Utility Model Content

[0004] This utility model provides a battery top cover assembly and a battery to solve the problems that the concentricity of the terminals, upper and lower plastic parts, and top cover depends on manual or complex tooling adjustments, and is prone to uneven pressure on the sealing ring due to assembly deviations, leading to sealing or insulation failure.

[0005] In a first aspect, this utility model provides a battery top cover assembly, comprising: The top cover body has pole hole; A first insulating member has a first side connected to the top cover body and a baffle formed on the second side. The baffle has a notch in the area directly opposite the axial projection of the pole hole. A first through hole is formed on the first insulating member opposite to the pole hole. The electrode post is inserted into the electrode post hole and the first through hole, and the end of the electrode post is exposed in the first through hole.

[0006] According to the present invention, a battery top cover assembly is provided, wherein the terminal post includes: a post body and a terminal post base plate; The column is inserted into the pole hole and the first through hole, the pole base plate is connected to the column, and the pole base plate is located on the second side of the first insulating member.

[0007] According to the present invention, a battery top cover assembly is provided, wherein a limiting groove adapted to the shape of the electrode base plate is formed on the second side of the first insulating member.

[0008] According to the present invention, the battery top cover assembly has a notch with a length of 2-10 mm along the length direction of the top cover body.

[0009] According to the present invention, one of the top cover body and the first insulating member is provided with a positioning post, and the other is provided with a positioning hole. The top cover body is fixed to the first insulating member by the positioning post and the positioning hole.

[0010] According to the present invention, a battery top cover assembly is provided, wherein multiple positioning holes and positioning posts are provided correspondingly.

[0011] According to the present invention, a battery top cover assembly further includes: The second insulating member is connected to the side of the top cover body away from the first insulating member. A mounting groove is formed on the side away from the top cover body. A second through hole for the pole to pass through is formed in the mounting groove at the position corresponding to the pole hole. A riveting block is disposed in the mounting groove, and a third through hole is formed at the position corresponding to the pole hole for the pole to pass through.

[0012] According to the present invention, a battery top cover assembly further includes: A sealing ring is fitted onto the pole post, and the sealing ring forms a seal with at least one of the sidewall of the first through hole, the sidewall of the pole post hole, and the sidewall of the second through hole.

[0013] According to the present invention, a battery top cover assembly is provided, wherein a liquid injection hole is formed on the top cover body. The first insulating member has a protective cover that communicates with the injection hole, and the protective cover has a communicating hole that is offset from the injection hole.

[0014] Secondly, this utility model also provides a battery, comprising: The battery casing, battery electrode assembly, and battery top cover assembly are provided, wherein the battery electrode assembly is located inside the casing and the battery top cover assembly is fixed to the opening of the casing.

[0015] The battery top cover assembly and battery provided by this utility model can directly constrain the exposed part of the end of the terminal post by setting a notch on the first insulating baffle and cooperating with the fixed mold, ensuring the coaxiality of the terminal post, the terminal post hole and the first through hole, reducing the reliance on manual adjustment, avoiding deviations caused by assembly deviations of the terminal post, and ensuring the accuracy of the assembly of the terminal post and the top cover body. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the front of the battery top cover assembly provided by this utility model.

[0018] Figure 2 This is a disassembly diagram of the battery top cover assembly provided by this utility model.

[0019] Figure 3 This is a side view of the battery top cover assembly provided by this utility model.

[0020] Figure 4 This is a schematic diagram of the back side of the first insulating component provided by this utility model.

[0021] Figure 5 This is a schematic diagram of the front of the first insulating component provided by this utility model.

[0022] Figure 6 This is a front view of the battery top cover assembly provided by this utility model.

[0023] Figure 7 yes Figure 6 A schematic diagram of section AA.

[0024] Figure 8 This is a three-dimensional structural diagram of the battery provided by this utility model.

[0025] Figure label: 1. Battery top cover assembly; 11. Top cover body; 111. Injection hole; 112. Terminal hole; 113. Positioning hole; 12. First insulating component; 121. First through hole; 122. Baffle; 1221. Notch; 123. Protective cover; 124. Limiting groove; 125. Positioning post; 13. Terminal post; 131. Post body; 132. Terminal post base plate; 14. Sealing ring; 15. Riveting block; 151. Third through hole; 16. Second insulating component; 161. Second through hole; 2. Shell. Detailed Implementation

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0028] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The following is combined Figures 1-8 This invention describes the battery top cover assembly 1 and the battery provided by this utility model.

[0031] This application provides a battery top cover assembly 1. For example... Figures 1 to 7 As shown, the battery top cover assembly 1 includes: a top cover body 11, a first insulating member 12, and a terminal post 13. The top cover body 11 has a terminal post hole 112. The first side of the first insulating member 12 is connected to the top cover body 11, and a baffle 122 is formed on the second side. The baffle 122 has a notch 1221 in the area directly opposite the axial projection of the terminal post hole 112. The notch 1221 is used to set a fixing mold. The first insulating member 12 has a first through hole 121 opposite to the terminal post hole 112. The terminal post 13 passes through the terminal post hole 112 and the first through hole 121, and the end of the terminal post 13 is exposed in the first through hole 121. The fixing mold is used to fix the end of the terminal post 13 through the notch 1221 so that the terminal post 13 is coaxial with the first through hole 121 and the terminal post hole 112.

[0032] In this embodiment, the first insulating member 12 is disposed on the top cover body 11, and the pole hole 112 on the top cover body 11 corresponds to the first through hole 121 on the first insulating member 12. Without limiting the position of the pole 13, if the pole 13 is installed normally, the pole 13 is easily located on a different axis from the pole hole 112 and the first through hole 121, affecting the accuracy of the assembly between the pole 13 and the top cover body 11.

[0033] Therefore, in this embodiment, during assembly, the first insulating component 12 is first installed on the top cover body 11, ensuring its first side fits tightly against the top cover body 11 to guarantee a strong and airtight connection. Then, the pole post 13 is sequentially passed through the pole post hole 112 of the top cover body 11 and the first through hole 121 of the first insulating component 12, so that the end of the pole post 13 is exposed in the first through hole 121. At this time, by using a fixing mold in conjunction with the notch 1221 on the baffle 122 of the first insulating component 12 (since the notch 1221 is located in the area directly opposite the axial projection of the pole post hole 112), the end of the pole post 13 can be fixed (e.g., clamped). The fixing mold can be designed according to the size and shape of the pole post 13 to achieve the best fixing effect, ensuring that the pole post 13 will not wobble or shift during assembly, thereby guaranteeing the coaxiality of the pole post 13 with each hole.

[0034] The battery top cover assembly 1 provided by this utility model can directly constrain the exposed part of the end of the pole post 13 by setting a notch 1221 on the baffle 122 of the first insulating component 12 and cooperating with the fixed mold, so as to ensure the coaxiality of the pole post 13 with the pole post hole 112 and the first through hole 121, reduce the reliance on manual adjustment, avoid the deviation of the pole post 13 caused by assembly deviation, and ensure the accuracy of the assembly and positioning of the pole post 13 and the top cover body 11.

[0035] It should be noted that, in order to fix the end of the pole post 13, the notch 1221 is generally aligned with the center of the pole post hole along the axis. However, the actual position of the notch 1221 can be adjusted according to the shape of the notch 1221 and the mold to be fixed. It is not limited to aligning the two completely. For example, the notch 1221 only needs to be set in an area that is aligned with the axial projection of the pole post hole 112. This area can be used to adjust the mold position within a certain range to avoid errors in actual operation.

[0036] In some embodiments, such as Figures 1 to 4 As shown, the pole post 13 includes: a pole body 131 and a pole post base plate 132; the pole body 131 passes through the pole post hole 112 and the first through hole 121, the pole post base plate 132 is connected to the pole body 131, and the pole post base plate 132 is located on the second side of the first insulating member 12. The fixing mold is used to fix the pole post base plate 132 through the notch 1221 so that the pole body 131 is coaxial with the first through hole 121 and the pole post hole 112. That is, the fixing mold effectively constrains the exposed part of the end of the pole post 13, and further enhances the stability between the pole post 13, the top cover body 11 and the first insulating member 12 by fixing the pole post base plate 132.

[0037] During assembly, the terminal base plate 132, secured by a fixed mold, ensures more precise positioning of the post 131 within the terminal hole 112 and the first through hole 121, reducing the risk of terminal 13 offset due to assembly deviations. Simultaneously, the tight fit between the terminal base plate 132 and the first insulating component 12 provides better electrical insulation and mechanical support for the battery top cover assembly 1. Furthermore, the terminal base plate 132 facilitates connection to other battery components or external circuits during subsequent battery assembly, improving the convenience and reliability of battery assembly.

[0038] like Figure 4 As shown, a limiting groove 124 adapted to the shape of the pole base plate 132 is also formed on the second side of the first insulating member 12. The interaction between the limiting groove 124 and the pole base plate 132 further enhances the positioning accuracy and stability of the pole base plate 132 on the first insulating member 12.

[0039] When the fixed mold fixes the pole base plate 132 through the notch 1221, the limiting groove 124 can effectively prevent the pole base plate 132 from shifting in the lateral and longitudinal directions, ensuring that the pole 131, the first through hole 121 and the pole hole 112 maintain a precise coaxial state.

[0040] In addition, the limiting groove 124 can also play a certain role in buffering and shock absorption. During battery operation, it can reduce the loosening or displacement of the terminal base plate 132 caused by vibration and other factors, thereby extending the battery's service life and enhancing its safety.

[0041] In some embodiments, such as Figures 1 to 3 As shown, the length of the notch 1221 along the length direction of the top cover body 11 is 2-10mm, that is, the width of the notch 1221 is 2-10mm. Practical verification has shown that this width range can effectively meet the fixing requirements between the pole post 13 and the baffle 122, ensuring that the pole post 13 remains stable during assembly, while avoiding problems such as insecure fixing or assembly difficulties caused by the notch 1221 being too wide or too narrow.

[0042] Furthermore, the number of notches 1221 is flexible, and one or more can be set according to actual needs. When a single notch 1221 is set, basic fixing requirements can be met, and the operation is relatively simple and convenient; while setting multiple notches 1221 can further enhance the fixing effect of the pole post 13, improve the stability and reliability of the assembly, and is especially suitable for scenarios with high assembly precision requirements, so that the battery top cover assembly 1 can adapt to pole posts 13 of different specifications and sizes, and has wide applicability and compatibility.

[0043] In some embodiments, such as Figures 2 to 5 As shown, one of the top cover body 11 and the first insulating member 12 is provided with a positioning post 125, and the other is provided with a positioning hole 113. The top cover body 11 is fixed to the first insulating member 12 by the positioning post 125 and the positioning hole 113.

[0044] In this embodiment, the first insulating component 12 is provided with a positioning post 125, and the top cover body 11 is provided with a positioning hole 113. The cooperation between the positioning post 125 and the positioning hole 113 can quickly guide the relative position of the top cover body 11 and the first insulating component 12, reducing the time and effort required for manual alignment and making the assembly process smoother and more efficient. The precise cooperation between the positioning post 125 and the positioning hole 113 can effectively prevent the top cover body 11 and the first insulating component 12 from shifting or misaligning during assembly, thereby ensuring the coaxiality of the terminal hole 112 and the first through hole 121. In addition, the cooperation between the positioning post 125 and the positioning hole 113 not only plays a positioning role, but also increases the connection strength between the top cover body 11 and the first insulating component 12, so that the two can remain stable during battery operation and are not easy to loosen or separate.

[0045] To further ensure the positioning of the top cover body 11 and the first insulating component 12, multiple positioning holes 113 and positioning posts 125 are provided. By setting multiple positioning posts 125 and positioning holes 113 in a mating structure, the connection force between the top cover body 11 and the first insulating component 12 can be distributed more evenly, further improving the tightness of their fit and positional accuracy. Moreover, since multiple positioning posts 125 and multiple positioning holes 113 are located in different positions, it can effectively prevent the top cover body 11 and the first insulating component 12 from rotating or shifting during assembly, and can also ensure the coaxiality of the pole post hole 112 and the first through hole 121, improving the overall stability of the pole post 13 assembly.

[0046] In some embodiments, such as Figures 1 to 7 As shown, the battery top cover assembly 1 further includes a second insulating member 16 and a riveting block 15. The second insulating member 16 is connected to the side of the top cover body 11 away from the first insulating member 12, and a mounting groove is formed on the side away from the top cover body 11. A second through hole 161 for the terminal post 13 to pass through is formed in the mounting groove at a position corresponding to the terminal post hole 112. The riveting block 15 is disposed in the mounting groove, and a third through hole 151 for the terminal post 13 to pass through is formed in the position of the riveting block 15 corresponding to the terminal post hole 112.

[0047] In this embodiment, the first insulating component 12 is the lower plastic of the cover plate body, and the second insulating component 16 is the upper plastic of the cover plate body. The second insulating component 16 has a mounting groove for mounting the riveting block 15. The riveting block 15 is mainly used to enhance the connection strength between the pole post 13 and the top cover body 11. The pole post 13 passes through the first through hole 121, the pole post hole 112, the second through hole 161, and the third through hole 151.

[0048] During the battery assembly process, the riveting block 15 can be riveted to the top cover body 11, thereby firmly riveting the terminal post 13 to the top cover body 11.

[0049] To achieve a seal on the terminal post 13, the battery top cover assembly 1 further includes a sealing ring 14. The sealing ring 14 is sleeved on the terminal post 13, and forms a seal with at least one of the sidewalls of the first through hole 121, the terminal post hole 112, and the second through hole 161. The sealing ring 14 fills the tiny gap between the terminal post 13 and the through hole through its elastic deformation, thereby preventing external liquids, gases, or impurities from entering the battery. Simultaneously, the sealing ring 14 also effectively prevents leakage of the electrolyte inside the battery.

[0050] To ensure a good seal, the sealing ring 14 can simultaneously form a seal with the sidewalls of the first through hole 121, the terminal hole 112, and the second through hole 161. This triple seal effectively guarantees the sealing performance of the entire battery top cover assembly 1. The sealing ring 14 can be made of rubber, such as nitrile rubber (NBR) or fluororubber (FKM). These materials have good elasticity and chemical corrosion resistance, and can maintain stable sealing performance over a wide temperature range.

[0051] Furthermore, this embodiment utilizes a fixed mold to fix the end of the pole post 13 with the notch 1221 on the baffle 122 of the first insulating component 12. This ensures the coaxiality of the sealing ring 14 fitted on the pole post 13, preventing uneven pressure on the sealing ring 14 due to assembly deviations, which could lead to sealing or insulation failure.

[0052] To facilitate electrolyte filling of the battery, such as Figures 1 to 3 As shown, a liquid injection hole 111 is formed on the top cover body 11, penetrating the top cover body 11. The liquid injection hole 111 provides a channel for directly injecting electrolyte into the battery, making the liquid injection operation simpler and faster. During battery production, electrolyte can be directly injected into the battery through the liquid injection hole 111. To prevent electrolyte leakage after liquid injection, the liquid injection hole 111 usually needs to be effectively sealed. Liquid injection plugs, welding, or other sealing technologies can be used to seal the liquid injection hole 111 to ensure the battery's sealing performance.

[0053] In this embodiment, a protective cover 123 communicating with the injection hole 111 is formed on the first insulating member 12. That is, the protective cover 123 is provided at the position corresponding to the injection hole 111 on the first insulating member 12. The protective cover 123 is provided with a communicating hole offset from the injection hole 111. The communicating hole communicates with the injection hole 111, allowing electrolyte to pass through. However, by offsetting the hole, the pressure during the injection process can be buffered to avoid direct impact on the battery electrode assembly.

[0054] Furthermore, the protective cover 123 is generally provided with multiple connecting holes. These holes can disperse the pressure during the electrolyte injection process, reducing the possibility of electrolyte ejection due to excessive pressure in a single hole. This helps protect the internal electrode assembly of the battery from damage caused by pressure shocks.

[0055] This application also provides a battery, such as... Figures 1 to 8As shown, the battery includes: a casing, a battery electrode assembly, and a battery top cover assembly 1. The battery electrode assembly is located inside the casing, and the battery top cover assembly 1 is fixed to the opening of the casing. The battery top cover assembly 1 includes: a top cover body 11, a first insulating member 12, and a terminal post 13. The top cover body 11 has a terminal post hole 112. A first side of the first insulating member 12 is connected to the top cover body 11, and a baffle 122 is formed on the second side. The baffle 122 has a notch 1221 for setting a fixing mold. A first through hole 121 is formed on the first insulating member 12, which is opposite to the terminal post hole 112. The terminal post 13 passes through the terminal post hole 112 and the first through hole 121, and the end of the terminal post 13 is exposed in the first through hole 121. The fixing mold is used to fix the end of the terminal post 13 through the notch 1221 so that the terminal post 13 is coaxial with the first through hole 121 and the terminal post hole 112.

[0056] In this embodiment, the first insulating member 12 is disposed on the top cover body 11, and the pole hole 112 on the top cover body 11 corresponds to the first through hole 121 on the first insulating member 12. Without limiting the position of the pole 13, if the pole 13 is installed normally, the pole 13 is easily located on a different axis from the pole hole 112 and the first through hole 121, affecting the accuracy of the assembly between the pole 13 and the top cover body 11.

[0057] Therefore, in this embodiment, during assembly, the first insulating member 12 is first installed on the top cover body 11, ensuring its first side fits tightly against the top cover body 11 to guarantee a strong and airtight connection. Then, the pole post 13 is sequentially passed through the pole post hole 112 of the top cover body 11 and the first through hole 121 of the first insulating member 12, so that the end of the pole post 13 is exposed in the first through hole 121. At this point, a fixing mold is used in conjunction with the notch 1221 on the baffle 122 of the first insulating member 12 to fix (e.g., clamp) the end of the pole post 13. The fixing mold can be designed according to the size and shape of the pole post 13 to achieve the best fixing effect, ensuring that the pole post 13 will not shake or shift during assembly, thereby guaranteeing the coaxiality of the pole post 13 with each hole.

[0058] The battery provided by this utility model can directly constrain the exposed part of the end of the pole post 13 by setting a notch 1221 on the baffle 122 of the first insulating component 12 and cooperating with the fixed mold, so as to ensure the coaxiality of the pole post 13, the pole post hole 112, and the first through hole 121, reduce the reliance on manual adjustment, avoid the deviation of the pole post 13 caused by assembly deviation, and ensure the accuracy of the assembly and positioning of the pole post 13 and the top cover body 11.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery top cover assembly (1), characterized in that, include: The top cover body (11) has a pole hole (112). The first insulating member (12) is connected to the top cover body (11) on the first side and a baffle (122) is formed on the second side. The baffle (122) has a notch (1221) in the area directly opposite to the axial projection of the pole hole (112). The first insulating member (12) has a first through hole (121) opposite to the pole hole (112). The pole post (13) is inserted into the pole post hole (112) and the first through hole (121), and the end of the pole post (13) is exposed in the first through hole (121).

2. The battery top cover assembly (1) according to claim 1, characterized in that, The pole post (13) includes: a pole body (131) and a pole post base plate (132); The column (131) is inserted into the pole hole (112) and the first through hole (121), the pole base plate (132) is connected to the column (131), and the pole base plate (132) is located on the second side of the first insulating member (12).

3. The battery top cover assembly (1) according to claim 2, characterized in that, The second side of the first insulating member (12) is also formed with a limiting groove (124) that is adapted to the shape of the pole base plate (132).

4. The battery top cover assembly (1) according to claim 1, characterized in that, The notch (1221) has a length of 2-10 mm along the length direction of the top cover body (11).

5. The battery top cover assembly (1) according to claim 1, characterized in that, One of the top cover body (11) and the first insulating member (12) is provided with a positioning post (125) and the other is provided with a positioning hole (113). The top cover body is fixed to the first insulating member (12) by the positioning post (125) and the positioning hole (113).

6. The battery top cover assembly (1) according to claim 5, characterized in that, The positioning holes (113) and positioning posts (125) are provided in multiples.

7. The battery top cover assembly (1) according to claim 1, characterized in that, The battery top cover assembly (1) also includes: The second insulating member (16) is connected to the side of the top cover body (11) away from the first insulating member (12). A mounting groove is formed on the side away from the top cover body (11). A second through hole (161) is formed in the mounting groove at the position corresponding to the pole hole (112) for the pole (13) to pass through. The riveting block (15) is disposed in the mounting groove, and a third through hole (151) is formed at the position corresponding to the pole hole (112) for the pole (13) to pass through.

8. The battery top cover assembly (1) according to claim 7, characterized in that, The battery top cover assembly (1) also includes: A sealing ring (14) is fitted onto the pole post (13), and the sealing ring (14) forms a seal with at least one of the side wall of the first through hole (121), the side wall of the pole post hole (112), and the side wall of the second through hole (161).

9. The battery top cover assembly (1) according to any one of claims 1-8, characterized in that, A liquid injection hole (111) is formed on the top cover body (11). The first insulating member (12) has a protective cover (123) that communicates with the injection hole (111), and the protective cover (123) has a communicating hole offset from the injection hole (111).

10. A battery, characterized in that, include: The housing (2), the battery electrode assembly and the battery top cover assembly (1) as described in any one of claims 1-9, wherein the battery electrode assembly is located inside the housing (2) and the battery top cover assembly (1) is fixed to the opening of the housing (2).

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