Power battery cover plate and power battery

Abstract

The utility model relates to battery technical field provides a power battery cover plate and power battery, power battery cover plate includes light aluminum sheet, convex hull, first upper plastic, second upper plastic and insulating top patch, convex hull is along the thickness direction of light aluminum sheet and is arranged on the upper surface of light aluminum sheet, and the both ends of convex hull along the length direction of light aluminum sheet are formed with first sunken groove and second sunken groove respectively with the upper surface of light aluminum sheet, first upper plastic is adapted with first sunken groove, and the thickness of first upper plastic is not greater than the thickness of convex hull, the top of first upper plastic is provided with first recess, and one side of first recess away from convex hull is equipped with first gap, second upper plastic is adapted with second sunken groove, and the thickness of second upper plastic is not greater than the thickness of convex hull, the top of second upper plastic is provided with second recess, and one side of second recess away from convex hull is equipped with second gap, the utility model can make insulating top patch can cover convex hull and upper plastic surface completely, and the pressure of water cooling plate is borne through this integral plane structure jointly, avoids the problem that pole post is damaged under the stress alone.

Description

Technical Field

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

[0002] With the development of new energy technologies, the fast-charging performance and safety of power batteries, as core energy storage components, have become a key focus of the industry. In fast-charging scenarios, the terminal area of ​​the cell cover is prone to generating a large amount of heat due to the large current passing through it. If heat dissipation is not timely, it can lead to a decline in battery performance or even safety risks.

[0003] In the prior art, the aluminum sheet of the cover plate usually has a protrusion, and the pole, connecting piece and other components protrude from the surface of the aluminum sheet, forming an irregular protrusion structure. This makes it impossible for the entire package of water cooling plate to fit tightly with the surface of the cover plate. If the water cooling plate is forced to directly contact the pole, its service life will be shortened because the pole bears the force alone. In severe cases, the pole and connecting piece may fall off, which poses a significant structural hazard.

[0004] Meanwhile, the irregular protruding structure of the cover plate makes it difficult to apply traditional insulating film smoothly, which can easily lead to problems such as lifting and loose adhesion, resulting in unstable insulation performance and increasing the risk of battery short circuit. Utility Model Content

[0005] This utility model provides a power battery cover and a power battery to solve the problems in the prior art where the irregular protrusion structure formed by the terminal post protrusion of the power battery cover makes it difficult to smoothly adhere the traditional insulating film and the water cooling plate cannot be tightly attached to the surface of the cover.

[0006] In a first aspect, this utility model provides a power battery cover, comprising: Plain aluminum sheet; A convex bulge is disposed on the upper surface of the aluminum sheet along the thickness direction of the aluminum sheet, and the two ends of the convex bulge along the length direction of the aluminum sheet respectively form a first groove and a second groove with the upper surface of the aluminum sheet. The first upper plastic is adapted to the first sink, and the thickness of the first upper plastic is not greater than the thickness of the protrusion; the top of the first upper plastic is provided with a first groove, and the side of the first groove opposite to the protrusion is provided with a first notch; The second upper plastic is adapted to the second sink, and the thickness of the second upper plastic is not greater than the thickness of the protrusion; the top of the second upper plastic is provided with a second groove, and the side of the second groove opposite to the protrusion is provided with a second notch.

[0007] The power battery cover provided by this utility model also includes an insulating top patch, which is arranged parallel to the light aluminum sheet and covers the upper surfaces of the convex bulge, the first upper plastic and the second upper plastic.

[0008] According to the power battery cover provided by this utility model, the insulating top patch includes: The main insulating section is in contact with the upper surface of the convex hull; End insulating sections are respectively disposed at both ends of the main insulating section. The end insulating sections are in contact with at least a portion of the upper surfaces of the first upper plastic and the second upper plastic, and have the same shape as the upper surfaces of the first upper plastic and the second upper plastic.

[0009] According to the power battery cover provided by this utility model, the end insulating section is integrally formed with the main insulating section, and the end insulating section is a ring structure with a notch.

[0010] The power battery cover provided by this utility model also includes: A pair of rivet blocks, the pair of rivet blocks being adapted to the first groove and the second groove respectively, and the thickness of the rivet blocks being less than the thickness of the convex bulge.

[0011] The power battery cover provided by this utility model also includes: Connecting piece, the connecting piece comprising: The main body is adapted to the first groove or the second groove and contacts the upper surface of the rivet block; An extension portion is connected to the side of the main body away from the convex bulge along the length direction of the aluminum sheet and is integrally formed with the main body. The extension portion can extend outward from the first notch or the second notch along the length direction of the aluminum sheet.

[0012] According to the power battery cover provided by this utility model, a first through hole is provided in the first sink, and the first through hole penetrates the aluminum sheet along the thickness direction of the aluminum sheet. A second through hole is provided in the second sink, and the second through hole penetrates the aluminum sheet along the thickness direction of the aluminum sheet.

[0013] The power battery cover provided by this utility model also includes: A lower plastic is disposed on the lower surface of the aluminum sheet. The lower plastic has a first through hole and a second through hole respectively opened along the length direction of the aluminum sheet. The first through hole corresponds to the first through hole, and the second through hole corresponds to the second through hole. A positive electrode post, which is adapted to the first through hole and the first through hole, and the positive electrode post passes through the first through hole along the thickness direction of the aluminum sheet and is connected to the first upper plastic and the riveting block in sequence. The negative electrode post is adapted to the second through hole and the second through hole, and the negative electrode post passes through the second through hole along the thickness direction of the aluminum sheet and is connected to the second upper plastic and the riveting block in sequence.

[0014] According to the power battery cover provided by this utility model, a sealing ring is provided at the connection between the positive terminal post and the lower plastic, and at the connection between the negative terminal post and the lower plastic. The sealing ring is sleeved on the positive terminal post and the negative terminal post.

[0015] Secondly, this utility model provides a power battery, including a power battery cover as described in the first aspect.

[0016] This utility model provides a power battery cover and a power battery, including: a light aluminum sheet, a raised bump, a first upper plastic, a second upper plastic, and an insulating top patch; by adopting the matching design of the first upper plastic with the first recess and the second upper plastic with the second recess, the upper plastic can be tightly embedded in the recessed area formed by the light aluminum sheet and the raised bump, avoiding incomplete insulation coverage due to positional displacement of the upper plastic; by adopting the design that the thickness of the first and second upper plastics is no greater than the thickness of the raised bump, the overall height of the upper plastic is basically the same as the height of the raised bump, ensuring that the top of the upper plastic is basically flush with the top of the raised bump, providing a flat surface for the subsequent covering of the insulating top patch, so that the insulating top patch can completely cover the surface of the raised bump and the upper plastic, further enhancing the overall insulation effect of the cover; the groove of the upper plastic can accurately accommodate the riveting block and connecting piece, preventing these components from shifting or loosening during battery charging, discharging, and vibration; the notch on the side of the first and second grooves facing away from the raised bump provides operating space for the subsequent installation and maintenance of the riveting block and connecting piece 7, and the component installation position can be quickly located through the notch.

[0017] Furthermore, the flat insulating surface can be fitted with the upper water-cooling plate of the battery pack, reducing stress concentration caused by local protrusions or gaps. This solves the problem that traditional cover plates cannot be fitted with water-cooling plates due to protruding structures such as terminals. The cooling capacity of the water-cooling plate can be efficiently conducted to the cover plate and the area near the terminals through the flat contact surface, achieving cooling of the terminals and effectively meeting the heat dissipation requirements in fast charging scenarios. At the same time, the overall planar structure shares the pressure of the water-cooling plate, avoiding the problem of the terminals being damaged by stress due to the water-cooling plate being directly fitted to the terminals, reducing the risk of terminals and connecting pieces falling off, and improving the stability and service life of the overall cover plate structure. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is an exploded view of the structure of a power battery cover provided in an embodiment of this utility model.

[0020] Figure 2 This is a front view of the insulating top patch provided in this embodiment of the utility model.

[0021] Figure 3 This is a schematic diagram of the connecting piece provided in an embodiment of the present utility model.

[0022] Figure 4 This is an assembly effect diagram of a power battery cover for an electronic device provided by this utility model.

[0023] Figure label: 1. Plain aluminum sheet; 2. Convex bulge; 3. First upper plastic sheet; 4. Second upper plastic sheet; 5. Insulating top patch; 51. Main insulating section; 52. End insulating section; 6. Riveting block; 7. Connecting piece; 71. Main body; 72. Extension; 8. First through hole; 9. Second through hole; 10. Lower plastic sheet; 11. Positive electrode post; 12. Negative electrode post; 13. Sealing ring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The following is combined with Figures 1-4 This utility model describes a power battery cover and a power battery.

[0026] Reference Figure 1 , Figure 4 This utility model provides a power battery cover plate, including: a light aluminum sheet 1, a convex bulge 2, a first upper plastic 3, a second upper plastic 4, and an insulating top patch 5.

[0027] The convex bulge 2 is disposed on the upper surface of the aluminum sheet 1 along the thickness direction of the aluminum sheet 1. The two can be integrally formed. The two ends of the convex bulge 2 along the length direction of the aluminum sheet 1 form a first groove and a second groove with the upper surface of the aluminum sheet 1, respectively. The first upper plastic 3 is adapted to the first groove, and the thickness of the first upper plastic 3 is not greater than the thickness of the convex bulge 2. The top of the first upper plastic 3 is provided with a first groove for accommodating the riveting block 6 and the connecting piece 7. The side of the first groove away from the convex bulge 2 is provided with a first notch. The second upper plastic 4 is adapted to the second groove, and the thickness of the second upper plastic 4 is not greater than the thickness of the convex bulge 2. The top of the second upper plastic 4 is provided with a second groove for accommodating the riveting block 6 and the connecting piece 7. The side of the second groove away from the convex bulge 2 is provided with a second notch.

[0028] As can be seen from the above scheme, this utility model, by adopting the matching design of the first upper plastic 3 with the first recess and the second upper plastic 4 with the second recess, allows the upper plastic to be tightly embedded in the recessed area formed by the light aluminum sheet 1 and the convex 2, avoiding incomplete insulation coverage due to positional displacement of the upper plastic; by adopting the design that the thickness of the first upper plastic 3 and the second upper plastic 4 is no greater than the thickness of the convex 2, the overall height of the upper plastic is basically the same as the height of the convex 2, ensuring that the top of the upper plastic is basically flush with the top of the convex 2, providing a flat surface for the subsequent covering of the insulating top patch 5, so that the insulating top patch 5 can completely cover the convex 2 and the surface of the upper plastic, further enhancing the overall insulation effect of the cover plate; the groove of the upper plastic can accurately accommodate the riveting block 6 and the connecting piece 7, preventing these components from shifting or loosening during battery charging and discharging and vibration; the notch on the side of the first groove and the second groove facing away from the convex 2 provides operating space for the subsequent installation and maintenance of the riveting block 6 and the connecting piece 7, and the installation position of the components can be quickly located through the notch.

[0029] Furthermore, the flat insulating surface can be fitted with the upper water-cooling plate of the battery pack, reducing stress concentration caused by local protrusions or gaps. This solves the problem that traditional cover plates cannot be fitted with water-cooling plates due to protruding structures such as terminals. The cooling capacity of the water-cooling plate can be efficiently conducted to the cover plate and the area near the terminals through the flat contact surface, achieving cooling of the terminals and effectively meeting the heat dissipation requirements in fast charging scenarios. At the same time, the overall planar structure shares the pressure of the water-cooling plate, avoiding the problem of the terminals being damaged by stress due to the water-cooling plate being directly fitted to the terminals, reducing the risk of terminals and connecting pieces 7 falling off, and improving the stability and service life of the overall cover plate structure.

[0030] In this embodiment, one side of the first upper plastic 3 is attached to one end face of the convex pack 2 along the length direction of the light aluminum sheet 1, and the distance between the opposite sides of the first upper plastic 3 is the same as the width of the convex pack 2. One side of the second upper plastic 4 is attached to the other end face of the convex pack 2 along the length direction of the light aluminum sheet 1, and the distance between the opposite sides of the second upper plastic 4 is the same as the width of the convex pack 2.

[0031] In this embodiment, an insulating top patch 5 is also included. The insulating top patch 5 is arranged parallel to the light aluminum sheet 1 and covers the upper surfaces of the convex bulge 2, the first upper plastic 3 and the second upper plastic 4.

[0032] With this design, since the thickness of the first upper plastic 3 and the second upper plastic 4 is not greater than the thickness of the convex 2, the overall height of the upper plastic is basically the same as the height of the convex 2. The insulating top patch 5 can cover the upper surface of the convex 2, the first upper plastic 3 and the second upper plastic 4. The overall insulation of the plane is achieved by the insulating top patch 5, which solves the problems in the prior art where it is difficult to stick the insulating film to the irregular structure formed by the protrusions such as the aluminum sheet 1, the convex 2 and the pole, and the problem that the insulating film is easy to lift when pasted on the narrow side.

[0033] like Figure 1 As shown, in some embodiments, the insulating top patch 5 includes: a main insulating section 51 and an end insulating section 52. The main insulating section 51 is in contact with the upper surface of the convex 2. The end insulating sections 52 are respectively disposed at both ends of the main insulating section 51 and are in contact with the upper surfaces of the first upper plastic 3 and the second upper plastic 4, and have the same shape as the upper surfaces of the first upper plastic 3 and the second upper plastic 4.

[0034] like Figure 2 As shown, the main insulating section 51 can be a rectangular plate structure with the same surface size as the upper surface of the convex pack 2, completely covering the upper surface of the convex pack 2. Since the first upper plastic 3 and the second upper plastic 4 are both provided with grooves and have notches on the side away from the convex pack 2, the end insulating section 52 is set as a rectangular ring structure with notches, so that the insulating top patch 5 completely covers the upper surfaces of the convex pack 2 and the two upper plastics, forming a continuous and uniformly high plane.

[0035] With this configuration, the main insulating section 51 and the end insulating section 52 respectively cover the upper surface of the convex package 2 and the upper plastic. Combined with the design that the upper plastic is flush with and at the same height as the convex package 2, the insulating top patch 5 forms a flat outer surface that can be tightly bonded to the upper water-cooling plate of the entire package. By precisely contacting the upper surface of the convex package 2 with the main insulating section 51, and setting the end insulating section 52 to have the same shape and fit with the upper surface of the first upper plastic 3 and the second upper plastic 4, the problem of insulation layer wrinkles and easy lifting caused by shape mismatch can be avoided. This ensures that the insulating top patch 5 is tightly bonded to each contact surface, significantly improving the local insulation reliability of the convex package 2 and the upper plastic area, and eliminating the risk of leakage at the gaps in the irregular structure.

[0036] Preferably, the end insulating section 52 is integrally formed with the main insulating section 51, and the end insulating section 52 is a ring structure with a notch; by integrally forming the main insulating section 51 and the end insulating section 52, the insulating top patch 5 forms a continuous and complete insulating structure, avoiding the risk of cracking and falling off at the joint of the segmented insulating layer; extending the service life of the insulating top patch 5; the integrated insulating top patch 5 not only avoids the damage to the pole caused by the water-cooled plate directly contacting the pole through the overall load-bearing of the cover plate, but also ensures that the cold energy is efficiently conducted to the convex 2 and the upper plastic area through the flat contact surface, realizing indirect cooling of the pole, meeting the heat dissipation requirements in the fast charging scenario, and taking into account insulation, heat dissipation and structural safety.

[0037] In this embodiment, a pair of rivet blocks 6 are also included. The pair of rivet blocks 6 are adapted to the first groove and the second groove respectively, and the thickness of the rivet block 6 is less than the thickness of the protrusion 2. The rivet block 6 is used to connect with the pole post. Preferably, the thickness of the rivet block 6 is at least 0.5 mm less than the thickness of the protrusion 2.

[0038] With this configuration, the rivet block 6 is adapted to the first groove and the second groove, and its thickness is less than that of the convex 2. This prevents the rivet block 6 from protruding from the plane formed by the convex 2 and the upper plastic, ensuring that the upper surface of the convex 2 and the upper plastic can form a continuous and flat base plane. This ensures the insulation effect and plane consistency of the insulating top patch 5, and avoids wrinkles or insulation failure of the top patch caused by the protrusion of the rivet block 6.

[0039] Furthermore, it also includes a connecting piece 7, which comprises a main body 71 and an extension 72, such as... Figure 3 As shown, both the main body 71 and the extension 72 can be rectangular structures. The main body 71 is adapted to the first groove or the second groove and contacts the upper surface of the rivet block 6. The extension 72 is connected to the side of the main body 71 away from the protrusion 2 along the length direction of the aluminum sheet 1 and is integrally formed with the main body 71. The extension 72 can extend outward from the first notch or the second notch along the length direction of the aluminum sheet 1.

[0040] With this configuration, the connecting piece 7 serves as a conductive connector. Its main body 71 contacts the upper surface of the rivet block 6, enabling electrical connection between the positive terminal 11, the negative terminal 12, and the external circuit. This ensures that the internal current of the power battery is transmitted outward through the connecting piece 7. Simultaneously, the matching relationship between the main body 71 and the first groove allows for the positioning and installation of the connecting piece 7 on the cover plate. The main body 71 adopts a rectangular structure and is adapted to the first groove, allowing it to fit tightly against the groove and the surface of the rivet block 6, preventing displacement of the connecting piece 7 during assembly or use. The extension 72 is integrally formed with the main body 71 and extends from the notch along the length of the aluminum sheet 1. It can flexibly extend to the external connection point according to the overall circuit layout, adapting to the spatial structure requirements of the entire power battery pack.

[0041] In this embodiment, the first sink and the second sink are the same size. The first sink is provided with a first through hole 8, which penetrates the aluminum sheet 1 along the thickness direction of the aluminum sheet 1. The second sink is provided with a second through hole 9, which penetrates the aluminum sheet 1 along the thickness direction of the aluminum sheet 1.

[0042] like Figure 1 As shown, it also includes: a lower plastic 10, a positive electrode post 11, and a negative electrode post 12. The lower plastic 10 is disposed on the lower surface of the aluminum sheet 1. The lower plastic 10 has a first through hole and a second through hole respectively opened along the length direction of the aluminum sheet 1. The first through hole corresponds to the first through hole 8, and the second through hole corresponds to the second through hole 9. The lower plastic 10 provides support for the electrode post and, through the material properties of the lower plastic 10, prevents the electrode post from directly conducting electricity with the aluminum sheet 1.

[0043] The positive terminal 11 is adapted to the first through hole and the first through hole 8, and the positive terminal 11 passes through the first through hole 8 along the thickness direction of the aluminum sheet 1 and is connected to the first upper plastic 3 and the riveting block 6 in sequence; the negative terminal 12 is adapted to the second through hole and the second through hole 9, and the negative terminal 12 passes through the second through hole 9 along the thickness direction of the aluminum sheet 1 and is connected to the second upper plastic 4 and the riveting block 6 in sequence. The material of the riveting block 6 can be aluminum or aluminum alloy. The two terminals and the riveting block 6 are connected by mechanical riveting, which firmly connects the riveting block 6 and the terminals. The positive terminal 11 passes through the first through hole 8 and is connected to the first upper plastic 3 and the riveting block 6 in sequence. The negative terminal 12 is connected in the same way, forming a continuous current conduction path. This structural design enables the current to be efficiently conducted from the terminals to the connecting piece 7 through the riveting block 6.

[0044] With this configuration, the first through hole 8 of the first recess and the second through hole 9 of the second recess correspond to the first through hole and the second through hole of the lower plastic 10, respectively, forming a channel through which the electrode post penetrates the light aluminum sheet 1. The positive electrode post 11 is adapted to the first through hole 8 and the first through hole, and the negative electrode post 12 is adapted to the second through hole 9 and the second through hole. This ensures that the assembly position of the electrode post along the thickness direction of the light aluminum sheet 1 is accurate, avoiding the electrode post from tilting or shifting. This provides a foundation for the stable connection between the electrode post and the upper plastic and the rivet block 6, reducing poor contact or structural loosening caused by assembly deviation.

[0045] like Figure 1 As shown, the upper plastic is provided with through holes that are compatible with the pole posts, and the rivet block 6 is also provided with through holes. After the two pole posts pass through the corresponding upper plastic respectively, they are initially positioned with the through holes of their respective rivet blocks 6 through interference fit or transition fit. Then, the pole post ends or rivet blocks 6 are locally plastically deformed through the riveting process to form a tightly interlocking fastened connection.

[0046] Preferably, a sealing ring 13 is provided at the connection between the positive electrode post 11 and the lower plastic 10, and at the connection between the negative electrode post 12 and the lower plastic 10, and the sealing ring 13 is sleeved on the positive electrode post 11 and the negative electrode post 12.

[0047] This configuration not only enhances the tightness of the connection between the electrode post, the lower plastic 10, and the aluminum sheet 1, ensuring the stability of the overall structure during long-term use, but also blocks the contact path between the electrolyte inside the cell and the external environment through elastic sealing, effectively preventing electrolyte leakage. At the same time, it prevents external moisture and impurities from entering the cell, significantly improving the sealing reliability of the cell and reducing safety risks such as short circuits and corrosion.

[0048] This utility model also provides a power battery, including the power battery cover plate mentioned above. Since it adopts the power battery cover plate mentioned above, it has all the advantages, which will not be repeated here.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A power battery cover, characterized in that, include: Plain aluminum sheet; A convex bulge is disposed on the upper surface of the aluminum sheet along the thickness direction of the aluminum sheet, and the two ends of the convex bulge along the length direction of the aluminum sheet respectively form a first groove and a second groove with the upper surface of the aluminum sheet. The first upper plastic is adapted to the first sink, and the thickness of the first upper plastic is not greater than the thickness of the protrusion; the top of the first upper plastic is provided with a first groove, and the side of the first groove opposite to the protrusion is provided with a first notch; The second upper plastic is adapted to the second sink, and the thickness of the second upper plastic is not greater than the thickness of the protrusion; the top of the second upper plastic is provided with a second groove, and the side of the second groove opposite to the protrusion is provided with a second notch.

2. The power battery cover according to claim 1, characterized in that, It also includes an insulating top patch, which is arranged parallel to the light aluminum sheet and covers the upper surfaces of the convex bulge, the first upper plastic and the second upper plastic.

3. The power battery cover according to claim 2, characterized in that, The insulating top patch includes: The main insulating section is in contact with the upper surface of the convex hull; End insulating sections are respectively disposed at both ends of the main insulating section. The end insulating sections are in contact with at least a portion of the upper surfaces of the first upper plastic and the second upper plastic, and have the same shape as the upper surfaces of the first upper plastic and the second upper plastic.

4. The power battery cover according to claim 3, characterized in that, The end insulating section is integrally formed with the main insulating section, and the end insulating section is a ring structure with a notch.

5. The power battery cover according to claim 2, characterized in that, Also includes: A pair of rivet blocks, the pair of rivet blocks being adapted to the first groove and the second groove respectively, and the thickness of the rivet blocks being less than the thickness of the convex bulge.

6. The power battery cover according to claim 5, characterized in that, Also includes: Connecting piece, the connecting piece comprising: The main body is adapted to the first groove or the second groove and contacts the upper surface of the rivet block; An extension portion is connected to the side of the main body away from the convex bulge along the length direction of the aluminum sheet and is integrally formed with the main body. The extension portion can extend outward from the first notch or the second notch along the length direction of the aluminum sheet.

7. The power battery cover according to claim 5, characterized in that, A first through hole is provided in the first settling tank, and the first through hole penetrates the aluminum sheet along the thickness direction of the aluminum sheet; A second through hole is provided in the second sink, and the second through hole penetrates the aluminum sheet along the thickness direction of the aluminum sheet.

8. The power battery cover according to claim 7, characterized in that, Also includes: A lower plastic is disposed on the lower surface of the aluminum sheet. The lower plastic has a first through hole and a second through hole respectively opened along the length direction of the aluminum sheet. The first through hole corresponds to the first through hole, and the second through hole corresponds to the second through hole. A positive electrode post, which is adapted to the first through hole and the first through hole, and the positive electrode post passes through the first through hole along the thickness direction of the aluminum sheet and is connected to the first upper plastic and the riveting block in sequence. The negative electrode post is adapted to the second through hole and the second through hole, and the negative electrode post passes through the second through hole along the thickness direction of the aluminum sheet and is connected to the second upper plastic and the riveting block in sequence.

9. The power battery cover according to claim 8, characterized in that, A sealing ring is provided at the connection between the positive electrode post and the lower plastic part, and at the connection between the negative electrode post and the lower plastic part. The sealing ring is sleeved on the positive electrode post and the negative electrode post.

10. A power battery, characterized in that, Including the power battery cover as described in any one of claims 1-9.

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