Battery sealing assembly, battery cover plate assembly and battery

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a battery sealing assembly, a battery cover plate assembly and a battery, the battery sealing assembly comprises a nail cap, a nail rod, a first sealing ring and a second sealing ring, a liquid injection hole is formed in a battery cover plate, the nail cap is mounted in the liquid injection hole, and the nail rod is mounted in a mounting through hole of the nail cap; the first sealing ring is mounted between the nail rod and the hole wall of the mounting through hole, and the first sealing ring is in a compressed and tensioned state; the second sealing ring is installed between the nail cap and the hole wall of the liquid injection hole, and the second sealing ring is in a compressed and tensioned state. Therefore, the sealing effect is achieved through interference fit of all parts, namely, the assembly is physically assembled, so that the potential risk of welding internal cracks of a sealing nail is avoided, the requirements for electrolyte residues of a liquid injection opening and the purity of a cover plate material are low, laser welding burst points caused by foreign matter generated in the sealing process are avoided, and the sealing effect is good. And moreover, the structure is simple, and the cost is relatively low.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a battery sealing assembly, a battery cover assembly and a battery. Background Art

[0002] At present, in recent years, lithium battery manufacturing technology has been rapidly developed, and aluminum shell batteries are increasingly widely used. Sealing pin welding is the last step in the battery cell assembly process. It is common to use round cap-shaped aluminum sealing pins for laser welding to achieve sealing. The battery cell is isolated from the external environment to form a sealed electrochemical system. Therefore, the sealing pin welding yield significantly affects the overall battery production yield and cost.

[0003] The effect of laser welding is affected by factors such as the cleanliness of the injection port, laser parameters, and the shape of the aluminum nails. Common problems such as cracks, explosion points, and pinholes often occur, affecting the reliability and safety of the entire battery. There are ways to optimize and solve the defects in the appearance of the sealing nails after welding, but the discovery and optimization of internal cracks has always been a difficult point. Utility Model Content

[0004] The purpose of the present application is to provide a battery sealing assembly, a battery cover assembly and a battery, which to a certain extent solves the technical problem in the prior art that in the aluminum shell battery manufacturing process, the sealing pins are fixed to the bare aluminum plate by welding, and welding cracks are extremely prone to occur inside the sealing pins.

[0005] The present application provides a battery sealing assembly, which is applied to a battery cover plate, and the battery cover plate is formed with a liquid injection hole, and the battery sealing assembly comprises: a nail cap, a nail rod, a first sealing ring and a second sealing ring; wherein the nail cap is installed in the liquid injection hole, and the nail rod is installed in the installation through hole of the nail cap;

[0006] The first sealing ring is installed between the nail rod and the hole wall of the installation through hole, and the first sealing ring is in a compressed and tightened state; the second sealing ring is installed between the nail cap and the hole wall of the injection hole, and the second sealing ring is in a compressed and tightened state.

[0007] In the above technical solution, further, the nail cap includes a clamping section, a sealing assembly section and a deformation section connected in sequence; wherein the clamping section is arranged on the outer side of the battery cover; the sealing assembly section is arranged in the injection hole; and the deformation section is arranged on the inner side of the battery cover.

[0008] In any of the above technical solutions, further, the second sealing ring includes a first sealing segment, a second sealing segment and a third sealing segment connected in sequence; wherein the first sealing segment is arranged on the outer side of the battery cover plate and is compressed between the pressing segment and the outer side of the battery cover plate;

[0009] The second sealing section is arranged in the injection hole and is compressed between the sealing assembly section and the hole wall of the injection hole; the third sealing section is arranged on the inner side of the battery cover plate and is compressed and sealed at the inner opening of the injection hole by the nail rod.

[0010] In any of the above technical solutions, further, the outer side wall of the third sealing section is formed with a guide cone surface, and along the thickness direction of the battery cover plate and from the inside to the outside, the guide cone surface is gradually expanded.

[0011] In any of the above technical solutions, further, along the thickness direction of the battery cover, the projection of the first sealing section is located within the projection of the sealing assembly section.

[0012] In any of the above technical solutions, further, the nail rod includes a lifting section and a pressing section connected in sequence; wherein the lifting section is passed through the first sealing ring, and one end of the lifting section can extend to the outside of the battery cover plate for the operator to hold and lift;

[0013] The extrusion section is located on the inner side of the battery cover plate and is used to compress the first sealing ring, the second sealing ring and the structure of the nail cap located on the inner side of the battery cover plate so that the three are deformed and blocked at the inner opening of the injection hole.

[0014] In any of the above technical solutions, further, the nail rod also includes a guide section, which is connected between the lifting section and the extrusion section, and is tapered along the thickness direction of the battery cover and from the inside to the outside.

[0015] In any of the above technical solutions, further, an inner wall of one end of the first sealing ring close to the inner side of the battery cover is formed with a guiding conical surface corresponding to the guiding section.

[0016] In any of the above technical solutions, further, the nail rod is assembled with the nail cap, the first sealing ring, the second sealing ring and the battery cover through a riveting process.

[0017] In any of the above technical solutions, further, the nail cap is made of aluminum alloy.

[0018] In any of the above technical solutions, further, the nail rod is made of aluminum alloy.

[0019] The present application also provides a battery cover assembly, comprising a battery cover and a battery sealing assembly as described in any of the above technical solutions, wherein the battery cover is formed with a liquid injection hole, and the battery sealing assembly is installed on the liquid injection hole and is used to block the liquid injection hole. Therefore, all the beneficial technical effects of the battery sealing assembly are obtained, and no further description is given here.

[0020] The present application also provides a battery, comprising a battery cover assembly as described in any of the above technical solutions, and thus having all the beneficial technical effects of the battery cover assembly, which will not be elaborated here.

[0021] Compared with the prior art, the beneficial effects of this application are:

[0022] The battery sealing assembly provided by the present application is composed of a nail cap, a nail rod, a first sealing ring and a second sealing ring. The sealing effect is achieved through the interference fit between the various components, that is, the assembly adopts physical assembly, thereby avoiding the potential risk of internal cracks in the sealing nail welding, and has low requirements for the residual electrolyte at the injection port and the purity of the cover material. During the sealing process, there will be no laser welding explosion points due to the generation of foreign matter, which improves the battery process yield, and there is no need to use a laser welding mechanism, which greatly reduces the equipment cost, which helps to reduce the production cost. In addition, the battery sealing assembly provided by the present application has a simple structure, the material is easy to obtain, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the assembly process of a battery sealing assembly and a battery cover provided in an embodiment of the present application;

[0025] Figure 2 A diagram of the battery sealing assembly and the battery cover provided in the embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of a nail cap provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a nail rod provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the structure of a second sealing ring provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of the first sealing ring provided in an embodiment of the present application.

[0030] Reference numerals:

[0031] 1-nail cap, 11-pressing section, 12-sealing assembly section, 13-deformation section, 14-mounting through hole, 2-nail rod, 21-lifting section, 22-guide section, 23-extrusion section, 3-first sealing ring, 31-guiding cone surface, 4-second sealing ring, 41-first sealing section, 42-second sealing section, 43-third sealing section, 431-guide cone surface, 5-battery cover. DETAILED DESCRIPTION

[0032] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0033] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0034] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Refer to the following Figures 1 to 6The invention describes a battery sealing assembly, a battery cover assembly and a battery according to some embodiments of the present application.

[0038] Embodiment 1

[0039] See also Figures 1 to 6 As shown, an embodiment of the present application provides a battery sealing assembly, which is applied to a battery cover plate 5, and the battery cover plate 5 is formed with a liquid injection hole, and the battery sealing assembly includes: a nail cap 1, a nail rod 2, a first sealing ring 3 and a second sealing ring 4; wherein the nail cap 1 is installed in the liquid injection hole, and the nail rod 2 is installed in the installation through hole 14 of the nail cap 1;

[0040] The first sealing ring 3 is installed between the nail rod 2 and the hole wall of the installation through hole 14, and the first sealing ring 3 is in a compressed and tightened state. It can be seen that along the thickness direction of the cover plate, the first sealing ring 3 also has through holes running through its two sides for installing the top rod; the second sealing ring 4 is installed between the nail cap 1 and the hole wall of the injection hole, and the second sealing ring 4 is in a compressed and tightened state. It can be seen that along the thickness direction of the cover plate, the second sealing ring 4 also has through holes running through its two sides for installing the nail cap 1.

[0041] According to the structure described above, the battery sealing assembly provided by the present application is composed of a nail cap 1, a nail rod 2, a first sealing ring 3 and a second sealing ring 4. The sealing effect is achieved through the interference fit between the various components, that is, the present assembly adopts physical assembly, thereby avoiding the potential risk of internal cracks in the sealing nail welding, and has low requirements for the residual electrolyte at the liquid filling port and the purity of the cover material. During the sealing process, no laser welding explosion points will be caused due to the generation of foreign matter, thereby improving the battery process yield, and there is no need to use a laser welding mechanism, so the equipment cost is greatly reduced, which also helps to reduce production costs.

[0042] In addition, the battery sealing assembly provided in the present application has a simple structure, the materials are easy to obtain, and the production cost is low.

[0043] In this embodiment, preferably, Figures 1 to 3 As shown, the nail cap 1 includes a pressing section 11, a sealing assembly section 12 and a deformation section 13 which are connected in sequence; wherein the pressing section 11 is arranged on the outer side of the battery cover 5; the sealing assembly section 12 is arranged in the injection hole; and the deformation section 13 is arranged on the inner side of the battery cover 5.

[0044] According to the structure described above, the pressing section 11 is arranged on the outer side of the battery cover plate 5, and forms a relative pulling force with the deformation section 13 after deformation, thereby pressing the nail rod 2, and can also be provided with the first sealing section 41 of the second sealing ring 4 described below, which plays a role in sealing the outer opening of the injection hole; when the nail rod 2 is lifted and tightened, the sealing assembly section 12 expands and changes its center, squeezing the second sealing section 42 of the second sealing ring 4 described below, and at the same time, the nail rod 2 squeezes the middle and upper part of the first sealing ring 3, thereby forming a seal, that is, it plays a role in sealing the inside of the injection hole; when the nail rod 2 is lifted and tightened, the nail rod 2 squeezes the deformation section 13, causing the deformation section 13 to expand and deform, and squeeze the third sealing section 43 of the second sealing ring 4 described below, and at the same time, the nail rod 2 squeezes the lower part of the first sealing ring 3, thereby forming a seal, thereby achieving the sealing of the inner opening of the injection hole.

[0045] Further, preferably, the pressing section 11 has a disc structure and is provided with a mounting through hole 14; the sealing assembly section 12 and the deformation section 13 are adapted cylindrical structures and are provided with mounting through holes 14 inside, and the inner diameter and outer diameter of the sealing assembly section 12 and the deformation section 13 are the same. Of course, it is not limited to this.

[0046] Further, preferably, along the thickness direction of the battery cover 5, the projections of the sealing assembly section 12 and the deformation section 13 completely fall into the clamping section 11, that is, along the thickness direction of the battery cover 5, the cross-sectional dimension of the clamping section 11 is larger than the cross-sectional dimension of the sealing assembly section 12 and the deformation section 13. Based on this, the inner diameter and outer diameter of the sealing assembly section 12 and the deformation section 13 are the same, and the diameter of the clamping section 11 is larger than the outer diameter of the sealing assembly section 12 and the deformation section 13.

[0047] Further, preferably, the pressing section 11, the sealing assembly section 12 and the deformation section 13 can be an integrated structure with good strength and not easy to be damaged. Of course, it is not limited to this.

[0048] In this embodiment, preferably, Figure 1 , Figure 2 and Figure 5 As shown, the second sealing ring 4 includes a first sealing segment 41, a second sealing segment 42 and a third sealing segment 43 connected in sequence; wherein the first sealing segment 41 is arranged on the outer side of the battery cover plate 5 and is compressed between the pressing segment 11 and the outer side of the battery cover plate 5;

[0049] The second sealing section 42 is arranged in the injection hole and is compressed between the sealing assembly section 12 and the hole wall of the injection hole; the third sealing section 43 is arranged on the inner side of the battery cover plate 5 and is compressed and sealed at the inner opening of the injection hole by the extrusion section 23 and the guide section 22 of the nail rod 2.

[0050] According to the structure described above, it can be known that the first sealing section 41 cooperates with the pressing section 11 of the nail cap 1 to seal the outside of the injection hole; the second sealing section 42 is interference fit with the sealing assembly section 12 of the nail cap 1 to seal the inside of the injection hole; the third sealing end is interference fit with the deformation section 13 of the nail cap 1 to seal the inner opening of the injection hole.

[0051] Further, preferably, the first sealing section 41 has a disc structure with a through hole, the second sealing section 42 is a cylindrical structure with a through hole, and the third sealing portion is a frustum structure with a through hole. Of course, it is not limited to this.

[0052] Further, preferably, the first sealing segment 41, the second sealing segment 42 and the third sealing segment 43 may be an integrated structure with good strength and not easily damaged, but of course, the present invention is not limited thereto.

[0053] In this embodiment, preferably, Figure 5 As shown, a guide conical surface 431 is formed on the outer side wall of the third sealing section 43 , and the guide conical surface 431 is gradually expanded along the thickness direction of the battery cover plate 5 and from the inside to the outside.

[0054] According to the structure described above, when the nail cap 1 is inserted into the injection hole from the outside of the battery cover plate 5, the guide cone surface 431 plays a guiding role, facilitating the insertion of the nail cap 1 and improving the assembly efficiency.

[0055] In this embodiment, preferably, Figure 2 As shown, along the thickness direction of the battery cover plate 5 , the projection of the first sealing segment 41 is located within the projection of the sealing assembly segment 12 .

[0056] According to the structure described above, the first sealing section 41 is hidden under the sealing assembly section 12 of the nail cap 1, which is more beautiful in appearance, protects the first sealing section 41, and helps to reduce the input of materials. Of course, it is not limited to this. Along the thickness direction of the battery cover plate 5, the projection of the first sealing section 41 is located outside the projection of the sealing assembly section 12, etc., which is specifically designed according to actual needs.

[0057] In this embodiment, preferably, Figure 1 , Figure 2 and Figure 4 As shown, the nail rod 2 includes a lifting section 21 and a pressing section 23 connected in sequence; wherein the lifting section 21 is arranged through the first sealing ring 3, and one end of the lifting section 21 can extend to the outside of the battery cover 5, so that the operator can hold and lift it;

[0058] The extrusion section 23 is located inside the battery cover 5 and is used to compress the first sealing ring 3, the second sealing ring 4 and the structure of the nail cap 1 located inside the battery cover 5 so that the three are deformed and sealed at the inner opening of the injection hole.

[0059] According to the structure described above, the lifting section 21 is convenient for the assembly worker to hold and lift the nail rod 2 upward, thereby forcing the extrusion section 23 of the nail rod 2 to squeeze the first sealing ring 3, the deformation section 13 of the nail cap 1 and the third sealing section 43 of the second sealing ring 4 to deform, thereby forming a seal.

[0060] In this embodiment, preferably, Figure 1 , Figure 2 and Figure 4 As shown, the nail rod 2 further includes a guide section 22, which is connected between the lifting section 21 and the extrusion section 23, and is tapered along the thickness direction of the battery cover plate 5 and from the inside to the outside.

[0061] According to the structure described above, during the rising process of the extrusion section 23, that is, during the process of lifting the nail rod 2 from the inner side of the battery cover plate 5 toward the outer side thereof, the guide section 22 plays a guiding role, thereby improving the assembly efficiency.

[0062] Further, preferably, the lifting section 21 is a round rod, the guide section 22 is a frustum structure, the extrusion section 23 is a cylindrical structure, and correspondingly, the first sealing ring 3 is a cylindrical structure with a circular through hole inside. Of course, the structures of each section of the nail rod 2 and the structure of the first sealing ring 3 are not limited to the above.

[0063] Further, preferably, the lifting section 21, the guide section 22 and the extrusion section 23 can be an integrated structure, which, of course, has good strength and is not easily damaged, but is not limited to this.

[0064] Further, preferably, the through hole opened by the second sealing ring 4, the through hole opened by the first sealing ring 3 and the installation through hole 14 opened by the nail cap 1 are all circular holes with regular shapes, which are convenient for processing and manufacturing and improve assembly accuracy. Of course, it is not limited to this.

[0065] In this embodiment, preferably, Figure 1 and Figure 6 As shown, the inner wall of one end of the first sealing ring 3 close to the inner side of the battery cover plate 5 is formed with a guiding conical surface 31 corresponding to the guiding section 22 .

[0066] According to the structure described above, it can be seen that the guiding conical surface 31 cooperates with the guiding section 22 to further improve the assembly efficiency.

[0067] In this embodiment, preferably, Figure 1 and Figure 2As shown, the nail rod 2 is assembled with the nail cap 1, the first sealing ring 3, the second sealing ring 4 and the battery cover 5 through a riveting process.

[0068] According to the structure described above, the nail cap 1, the first sealing ring 3, the second sealing ring 4 and the nail rod 2 are first installed into the injection hole of the battery cover 5 according to the preset assembly position. By pulling the nail rod 2, the deformation section 13 of the nail cap 1 is squeezed to deform and expand, driving the two sealing rings to further increase the interference, forming a tight seal. The sealing area covers the entire assembly area of ​​the rivet and the battery cover 5. The sealing area is large, and the pull riveting assembly is a physical assembly, which effectively avoids internal cracks in laser welding, and has low requirements on the residual electrolyte at the injection port and the purity of the cover material. During the sealing process, no laser welding explosion points will be caused due to the generation of foreign matter, thereby improving the battery process yield.

[0069] It should be noted that when the extrusion section 23 of the nail rod 2 rises to the limit position, the part of the structure of the nail rod 2 exposed to the nail cap 1 will be automatically pulled off, so that the appearance is more beautiful and no subsequent processing is required. Of course, this is not limited to this. Even if the part of the structure of the nail rod 2 exposed to the nail cap 1 is not pulled off, it can be cut off by tools such as shears.

[0070] In this embodiment, preferably, the materials of the nail rod 2 and the nail cap 1 are both aluminum alloy, which meets the strength requirements and can be adaptively deformed to squeeze the sealing ring to form a sealing structure. Of course, the materials of the nail rod 2 and the nail cap 1 are not limited to this, and can also be designed according to actual needs.

[0071] Embodiment 2

[0072] See also Figure 2 As shown, the second embodiment of the present application also provides a battery cover plate 5 assembly, including the battery sealing assembly described in the above-mentioned first embodiment, and thus has all the beneficial technical effects of the battery sealing assembly, and the same technical features and beneficial effects are no longer repeated.

[0073] In this embodiment, preferably, Figure 2 As shown, the battery cover plate 5 assembly also includes a battery cover plate 5, the battery cover plate 5 is formed with a liquid injection hole, and the battery sealing assembly is installed in the liquid injection hole and is used to seal the liquid injection hole.

[0074] According to the structure described above, the aforementioned battery sealing assembly can be used to effectively seal the injection hole, with good sealing effect, and physical assembly is used instead of welding sealing, thereby improving the yield rate of the battery cover plate 5 assembly.

[0075] Embodiment 3

[0076] Embodiment 3 of the present application further provides a battery, including the battery cover plate 5 assembly described in the above embodiment 1, and thus has all the beneficial technical effects of the battery cover plate 5 assembly, and the same technical features and beneficial effects are no longer repeated.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery sealing assembly, applied to a battery cover, wherein the battery cover is formed with a liquid injection hole, characterized in that: The battery sealing assembly comprises: a nail cap, a nail rod, a first sealing ring and a second sealing ring; wherein the nail cap is installed in the injection hole, and the nail rod is installed in the installation through hole of the nail cap; The first sealing ring is installed between the nail rod and the hole wall of the installation through hole, and the first sealing ring is in a compressed and tightened state; the second sealing ring is installed between the nail cap and the hole wall of the injection hole, and the second sealing ring is in a compressed and tightened state.

2. The battery sealing assembly according to claim 1, characterized in that: The nail cap includes a pressing section, a sealing assembly section and a deformation section which are connected in sequence; wherein the pressing section is arranged on the outer side of the battery cover; the sealing assembly section is arranged in the injection hole; and the deformation section is arranged on the inner side of the battery cover.

3. The battery sealing assembly according to claim 2, characterized in that: The second sealing ring includes a first sealing section, a second sealing section and a third sealing section connected in sequence; wherein the first sealing section is arranged on the outer side of the battery cover plate and is compressed between the pressing section and the outer side of the battery cover plate; The second sealing section is arranged in the injection hole and is compressed between the sealing assembly section and the hole wall of the injection hole; the third sealing section is arranged on the inner side of the battery cover plate and is compressed and sealed at the inner opening of the injection hole by the nail rod.

4. The battery sealing assembly according to claim 3, characterized in that: The outer side wall of the third sealing section is formed with a guide cone surface, and the guide cone surface is gradually expanded along the thickness direction of the battery cover plate and from the inside to the outside; and / or Along the thickness direction of the battery cover plate, the projection of the first sealing section is located within the projection of the sealing assembly section.

5. The battery sealing assembly according to claim 1, characterized in that: The nail rod comprises a lifting section and a pressing section connected in sequence; wherein the lifting section is passed through the first sealing ring, and one end of the lifting section can extend to the outside of the battery cover plate for the operator to hold and lift; The extrusion section is located on the inner side of the battery cover plate and is used to compress the first sealing ring, the second sealing ring and the structure of the nail cap located on the inner side of the battery cover plate so that the three are deformed and blocked at the inner opening of the injection hole.

6. The battery sealing assembly according to claim 5, characterized in that: The nail rod also includes a guide section, which is connected between the lifting section and the extrusion section and is tapered along the thickness direction of the battery cover plate from the inside toward the outside.

7. The battery sealing assembly according to claim 6, characterized in that: The inner wall of one end of the first sealing ring close to the inner side of the battery cover is formed with a guiding conical surface corresponding to the guiding section.

8. The battery sealing assembly according to any one of claims 1 to 7, characterized in that: The nail rod is assembled with the nail cap, the first sealing ring, the second sealing ring and the battery cover through a riveting process; and / or The nail cap is made of aluminum alloy; and / or The nail rod is made of aluminum alloy.

9. A battery cover assembly, characterized in that: It comprises a battery cover and a battery sealing assembly as claimed in any one of claims 1 to 8; wherein the battery cover is formed with a liquid injection hole, and the battery sealing assembly is installed on the liquid injection hole and is used to seal the liquid injection hole.

10. A battery, characterized in that: Includes the battery cover assembly as described in claim 9.

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