Power battery cover plate

Abstract

The utility model discloses a power battery cover plate. The power battery cover plate comprises a cover plate, a positive pole riveting groove is formed in the top surface of the positive pole column, a positive pole riveting part is formed on the outer side part of the positive pole riveting groove, and the positive pole column is used for riveting and fixing a positive pole injection molding part on the cover plate through the positive pole riveting part; a negative pole riveting groove is formed in the top surface of the negative pole column, a negative pole riveting part is formed on the outer side part of the negative pole riveting groove, and the negative pole column is used for riveting and fixing a negative pole injection molding part on the cover plate through the negative pole riveting part; according to the utility model, the problem that pressure holes are formed in the centers of the tops of the positive pole and the negative pole of the traditional power battery, so that when the positive pole and the negative pole are subjected to plastic deformation, the material is broken due to overlarge pressure can be solved.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, specifically to a power battery cover. Background Technology

[0002] The power battery cover consists of a cover plate base, terminals, upper plastic, lower plastic, sealing ring, explosion-proof valve, etc. Traditional power batteries have pressure holes at the center of the top of the positive and negative terminals for riveting the upper and lower plastic; however, the positive and negative terminals are at risk of material fracture due to excessive pressure during plastic deformation. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a power battery cover.

[0004] To achieve the above objectives, the technical solution adopted by this utility model includes: a cover plate; a positive electrode post, the top surface of which is provided with a positive electrode riveting groove, the outer side of which forms a positive electrode riveting part, the positive electrode post being riveted and fixed to the cover plate through the positive electrode riveting part; and a negative electrode post, the top surface of which is provided with a negative electrode riveting groove, the outer side of which forms a negative electrode riveting part, the negative electrode post being riveted and fixed to the cover plate through the negative electrode riveting part.

[0005] This application, by selecting the location of the positive electrode riveting groove on the positive electrode post and the location of the negative electrode riveting groove on the negative electrode post, can control the thickness of the positive electrode riveting part and the negative electrode riveting part, improve the vertical riveting strength of the positive electrode riveting part to the positive electrode injection molded part and the negative electrode riveting part to the negative electrode injection molded part, reduce the problem of damage to the positive electrode injection molded part and the negative electrode injection molded part caused by the power battery being subjected to external forces in the vertical direction, and reduce the probability of the positive electrode post and the negative electrode post falling off.

[0006] In the preferred embodiment of the above-mentioned power battery cover, the positive electrode injection molding part includes an upper positive electrode plastic disposed on the upper side of the cover and a lower positive electrode plastic disposed on the lower side of the cover. The positive electrode post passes through the lower positive electrode plastic, the cover and the upper positive electrode plastic in sequence. By applying an external force toward the cover towards the positive electrode riveting part, the positive electrode riveting part is cold-plastically deformed, and the upper positive electrode plastic is pressed tightly to the cover.

[0007] The negative electrode injection molded part includes an upper negative electrode plastic disposed on the upper side of the cover plate and a lower negative electrode plastic disposed on the lower side of the cover plate. The negative electrode post passes through the lower negative electrode plastic, the cover plate and the upper negative electrode plastic in sequence. By applying an external force toward the cover plate to the negative electrode riveting part, the negative electrode riveting part is cold-plastically deformed, pressing the upper negative electrode plastic onto the cover plate.

[0008] In the preferred technical solution of the above-mentioned power battery cover, the positive electrode riveting groove and the negative electrode riveting groove are closed ring structures, or are composed of multiple groove segments distributed circumferentially; the cross-sectional shape of the closed ring structure is circular, rectangular or polygonal.

[0009] In the preferred embodiment of the above-mentioned power battery cover, the radial width of the positive electrode riveting part and the negative electrode riveting part is 0.5-2mm.

[0010] In the preferred embodiment of the above-mentioned power battery cover, the axial height of the positive electrode riveting part and the negative electrode riveting part is 1-3mm.

[0011] In the preferred embodiment of the aforementioned power battery cover, the top surface of the cover is provided with a first step structure for positioning the plastic on the positive electrode and a second step structure for positioning the plastic on the negative electrode. By restricting the position of the plastic on the positive electrode with the first step structure and the position of the plastic on the negative electrode with the second step structure, the limiting effect of the positive electrode post on the positive electrode injection molded part and the limiting effect of the negative electrode post on the negative electrode injection molded part can be further improved, reducing the possibility of the positive electrode post and the negative electrode post detaching from the cover.

[0012] In the preferred embodiment of the above-mentioned power battery cover, the top plastic surface of the positive electrode is provided with a first groove to accommodate the deformed positive electrode riveting part, and the top plastic surface of the negative electrode is provided with a second groove to accommodate the deformed negative electrode riveting part.

[0013] In the preferred embodiment of the above-mentioned power battery cover, a first insulating element is sandwiched between the positive electrode post, the lower plastic of the positive electrode and the cover, and a second insulating element is sandwiched between the negative electrode post, the lower plastic of the negative electrode and the cover.

[0014] In the preferred technical solution of the above-mentioned power battery cover, the positive electrode post is an electrode post integrally stamped from aluminum material.

[0015] In the preferred technical solution of the above-mentioned power battery cover, the negative electrode post is a stamped electrode post formed by stamping copper-aluminum composite plate.

[0016] The beneficial effects of this utility model are that, by selecting the location of the positive electrode riveting groove on the positive electrode post and the location of the negative electrode riveting groove on the negative electrode post, this application can control the thickness of the positive electrode riveting part and the negative electrode riveting part, improve the vertical riveting strength of the positive electrode riveting part on the positive electrode injection molded part and the negative electrode riveting part on the negative electrode injection molded part, reduce the problem of damage to the positive electrode injection molded part and the negative electrode injection molded part caused by the power battery being subjected to external forces in the vertical direction, and reduce the probability of the positive electrode post and the negative electrode post falling off. Attached Figure Description

[0017] Figure 1 This is an exploded view of the present invention;

[0018] Figure 2 A cross-sectional view of this utility model Figure 1 ;

[0019] Figure 3 A cross-sectional view of this utility model Figure 2 ;

[0020] Figure 4 This is a schematic diagram of the positive terminal.

[0021] Figure 5 This is a cross-sectional view of the negative electrode post;

[0022] Figure 6 This is a schematic diagram of the cover plate.

[0023] Figure 7 This is a schematic diagram of the plastic on the positive electrode;

[0024] Figure 8 This is a schematic diagram of the plastic on the negative electrode;

[0025] In the diagram: cover plate 1, first step structure 11, second step structure 12, positive electrode post 2, positive electrode riveting groove 21, positive electrode riveting part 22, negative electrode post 3, negative electrode riveting groove 31, negative electrode riveting part 32, explosion-proof valve 41, explosion-proof valve film 42, upper plastic of positive electrode 51, first recessed groove 511, lower plastic of positive electrode 52, upper plastic of negative electrode 61, second recessed groove 611, lower plastic of negative electrode 62, first insulating component 71, second insulating component 72. Detailed Implementation

[0026] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figures 1 to 8 As shown, the power battery cover plate 1 of this utility model includes: a cover plate 1; a positive electrode post 2, the top surface of which is provided with a positive electrode riveting groove 21, and the outer side of the positive electrode riveting groove 21 forms a positive electrode riveting part 22, the positive electrode post 2 riveting and fixing the positive electrode injection molded part to the cover plate 1 through the positive electrode riveting part 22; and a negative electrode post 3, the top surface of which is provided with a negative electrode riveting groove 31, and the outer side of the negative electrode riveting groove 31 forms a negative electrode riveting part 32, the negative electrode post 3 riveting and fixing the negative electrode injection molded part to the cover plate 1 through the negative electrode riveting part 32.

[0030] See Figure 1 , Figure 6 The cover plate 1 has a first end and a second end. A first perforation is provided near the first end, and a positive electrode post 2 and a positive electrode injection molded part are provided. A second perforation is provided near the second end, and a negative electrode post 3 and a negative electrode injection molded part are provided. An explosion-proof port is provided in the middle of the cover plate 1, and an explosion-proof valve 41 and an explosion-proof valve film 42 are provided on the explosion-proof port.

[0031] See Figures 1 to 5 Both the positive electrode post 2 and the negative electrode post 3 have a "T" shaped cross section, that is, both the positive electrode post 2 and the negative electrode post 3 have a vertical part and a horizontal part. The top surface of the vertical part of the positive electrode post 2 is provided with a positive electrode riveting groove 21, and the vertical part of the positive electrode post 2 forms a positive electrode riveting part 22 on the outer side of the positive electrode riveting groove 21. The top surface of the vertical part of the negative electrode post 3 is provided with a negative electrode riveting groove 31, and the vertical part of the negative electrode post 3 forms a negative electrode riveting part 32 on the outer side of the negative electrode riveting groove 31. Before riveting and fixing the positive electrode injection molded part and the negative electrode injection molded part, the vertical part of the positive electrode post 2 needs to pass through the first through hole of the positive electrode injection molded part and the cover plate 1, and the vertical part of the negative electrode post 3 needs to pass through the second through hole of the negative electrode injection molded part and the cover plate 1.

[0032] See Figure 4 , Figure 5 The positive electrode riveting groove 21 on the top surface of the vertical part of the positive electrode post 2 is relatively close to the outer side of the vertical part of the positive electrode post 2, so that the positive electrode riveting part 22 has a suitable thickness, avoiding the problem that the radial width of the positive electrode riveting part 22 is too thick and difficult to rivet. Correspondingly, the negative electrode riveting groove 31 on the top surface of the vertical part of the negative electrode post 3 is relatively close to the outer side of the vertical part of the negative electrode post 3, so that the negative electrode riveting part 32 has a suitable thickness, which facilitates the plastic deformation of the negative electrode riveting part 32 while ensuring the riveting and fixing effect of the negative electrode injection molded part.

[0033] This application creates a positive electrode riveting groove 21 on the top surface of the vertical portion of the positive electrode post 2 and a negative electrode riveting groove 31 on the top surface of the vertical portion of the negative electrode post 3. This results in a positive electrode riveting part 22 forming on the outside of the positive electrode riveting groove 21 at the top of the vertical portion of the positive electrode post 2, and a negative electrode riveting part 32 forming on the outside of the negative electrode riveting groove 31 at the top of the vertical portion of the negative electrode post 3. Compared to the conventional design where an external force is directly applied to the top of the positive electrode post 2 (without a positive electrode riveting groove 21) and the negative electrode post 3 (without a negative electrode riveting groove 31), this design allows the positive electrode post 2 to rivet the positive electrode injection molded part to the cover plate 1, and the negative electrode post 3 to rivet the negative electrode injection molded part to the cover plate 1. In terms of method, this application has the structural characteristics of the positive electrode riveting part 22 riveting and fixing the positive electrode injection molded part stably, and the negative electrode riveting part 32 riveting the negative electrode injection molded part to the cover plate 1. In addition, by selecting the position of the positive electrode riveting groove 21 on the positive electrode post 2 and the position of the negative electrode riveting groove 31 on the negative electrode post 3, the thickness of the positive electrode riveting part 22 and the negative electrode riveting part 32 can be controlled, thereby improving the vertical riveting effect of the positive electrode riveting part 22 on the positive electrode injection molded part and the negative electrode riveting part 32 on the negative electrode injection molded part, reducing the problem of damage to the positive electrode injection molded part and the negative electrode injection molded part caused by the power battery being subjected to external forces in the vertical direction, and reducing the probability of the positive electrode post 2 and the negative electrode post 3 falling off.

[0034] In one or more embodiments, the positive electrode injection molding part includes an upper positive electrode plastic 51 disposed on the upper side of the cover plate 1 and a lower positive electrode plastic 52 disposed on the lower side of the cover plate 1. The positive electrode post 2 passes through the lower positive electrode plastic 52, the cover plate 1 and the upper positive electrode plastic 51 in sequence. By applying an external force toward the cover plate 1 to the positive electrode riveting part 22, the positive electrode riveting part 22 is cold-plastically deformed, pressing the upper positive electrode plastic 51 onto the cover plate 1. The negative electrode injection molding part includes an upper negative electrode plastic 61 disposed on the upper side of the cover plate 1 and a lower negative electrode plastic 62 disposed on the lower side of the cover plate 1. The negative electrode post 3 passes through the lower negative electrode plastic 62, the cover plate 1 and the upper negative electrode plastic 61 in sequence. By applying an external force toward the cover plate 1 to the negative electrode riveting part 32, the negative electrode riveting part 32 is cold-plastically deformed, pressing the upper negative electrode plastic 61 onto the cover plate 1.

[0035] See Figures 1 to 5 The positive electrode injection molding part includes upper positive electrode plastic 51 and lower positive electrode plastic 52, and the negative electrode injection molding part includes upper negative electrode plastic 61 and lower negative electrode plastic 62.

[0036] When installing the upper positive electrode plastic 51 and the lower positive electrode plastic 52 onto the cover plate 1 using the positive electrode post 2, first place the upper positive electrode plastic 51 on the upper side of the first through hole in the cover plate 1, place the lower positive electrode plastic 52 on the lower side of the first through hole in the cover plate 1, and then pass the positive electrode post 2 through the lower positive electrode plastic 52, the cover plate 1 and the upper positive electrode plastic 51 in sequence. Use a riveting or spinning device to squeeze and deform the positive electrode riveting part 22 of the positive electrode post 2 and press it tightly onto the top of the upper positive electrode plastic 51, thereby fixing the position of the positive electrode injection molded part, the positive electrode post 2 and the cover plate 1.

[0037] When installing the upper negative electrode plastic 61 and the lower negative electrode plastic 62 onto the cover plate 1 using the negative electrode post 3, first place the upper negative electrode plastic 61 on the upper side of the second through hole in the cover plate 1, and place the lower negative electrode plastic 62 on the lower side of the second through hole in the cover plate 1. Then, pass the negative electrode post 3 through the lower negative electrode plastic 62, the cover plate 1, and the upper negative electrode plastic 61 in sequence. Use a riveting or spinning device to squeeze and deform the negative electrode riveting part 32 of the negative electrode post 3 and press it tightly onto the top of the upper negative electrode plastic 61, thereby fixing the position of the negative electrode injection molded part, the negative electrode post 3, and the cover plate 1.

[0038] It should be noted that during the riveting process, the external force applied by the riveting or spinning equipment must exceed the yield strength to ensure that the positive riveting part 22 of the positive electrode post 2 or the negative riveting part 32 of the negative electrode post 3 can undergo plastic deformation. In addition, the amount of plastic deformation is controlled within the range of 5%-15% to avoid material cracking.

[0039] In one or more embodiments, the positive electrode riveting groove 21 and the negative electrode riveting groove 31 are closed ring structures, or are composed of multiple groove segments distributed circumferentially; the cross-sectional shape of the closed ring structure is circular, rectangular or polygonal.

[0040] It should be noted that the positive electrode crimping groove 21 and the negative electrode crimping groove 31 have two implementation methods:

[0041] In the first embodiment, the positive electrode crimping groove 21 and the negative electrode crimping groove 31 are closed ring structures, and the cross-section of the closed ring structure can be circular, rectangular, or polygonal. When the vertical portions of the positive electrode post 2 and the negative electrode post 3 are cylindrical, the positive electrode crimping groove 21 of the positive electrode post 2 and the negative electrode crimping groove 31 of the negative electrode post 3 are circular; when the vertical portions of the positive electrode post 2 and the negative electrode post 3 are rectangular, the positive electrode crimping groove 21 of the positive electrode post 2 and the negative electrode crimping groove 31 of the negative electrode post 3 are rectangular. This arrangement allows the present application to adapt to positive electrode posts 2 and negative electrode posts 3 of different shapes, thus improving the applicability of the present application.

[0042] In the second embodiment, the positive electrode riveting groove 21 and the negative electrode riveting groove 31 are composed of multiple groove segments distributed circumferentially. That is, after the positive electrode riveting part 22 of the positive electrode post 2 is riveted and formed, and the negative electrode riveting part 32 of the negative electrode post 3 is riveted and formed, multiple discontinuous riveting segments can be formed, so as to achieve the pressing of different sides of the plastic 51 on the positive electrode and the plastic 61 on the negative electrode. In addition, this method can facilitate the riveting and forming of the positive electrode riveting part 22 and the negative electrode riveting part 32 by the spinning equipment or the riveting equipment, reduce the risk of material breakage, further improve the pressing effect on the positive electrode injection molded part and the negative electrode injection molded part, and reduce the possibility of the positive electrode post 2 or the negative electrode post 3 falling off.

[0043] In one or more embodiments, the radial width of the positive electrode riveting portion 22 and the negative electrode riveting portion 32 is 0.5-2 mm. See also Figures 4 to 5 The radial width of the positive electrode riveting part 22 is the portion between the outer side of the vertical part of the positive electrode post 2 and the inner wall of the positive electrode riveting groove 21, and the radial width of the negative electrode riveting part 32 is the portion between the outer side of the vertical part of the negative electrode post 3 and the inner wall of the negative electrode riveting groove 31. It should be noted that the determination of the radial width of the positive electrode riveting part 22 and the negative electrode riveting part 32 needs to be selected according to the actual production needs, and there is no specific restriction.

[0044] In one or more embodiments, the axial height of the positive electrode riveting portion 22 and the negative electrode riveting portion 32 is 1-3 mm. See also Figures 4 to 5 The axial height of the positive electrode riveting part 22 is the same as the depth of the positive electrode riveting groove 21, and the axial height of the negative electrode riveting part 32 is the same as the depth of the negative electrode riveting groove 31. The axial heights of the positive electrode riveting part 22 and the negative electrode riveting part 32 need to be selected according to actual production needs, and there are no specific restrictions.

[0045] In one or more embodiments, the top surface of the cover plate 1 is provided with a first step structure 11 for positioning the plastic 51 on the positive electrode and a second step structure 12 for positioning the plastic 61 on the negative electrode.

[0046] See Figure 6 The first step structure 11 on the top surface of the cover plate 1 is located on the outer periphery of the first perforation, used to accommodate the plastic 51 on the positive electrode and restrict its position. The second step structure 12 on the top surface of the cover plate 1 is located on the outer periphery of the second perforation, used to accommodate the plastic 61 on the negative electrode and restrict its position. Combined with the positive electrode riveting part 22 of the positive electrode post 2 pressing the plastic 51 on the positive electrode in the vertical direction, the fixation of the positions of the plastic 51 on the positive electrode and the plastic 52 on the lower positive electrode can be further improved. Correspondingly, combined with the negative electrode riveting part 32 of the negative electrode post 3 pressing the plastic 61 on the negative electrode in the vertical direction, the positions of the plastic 61 on the upper negative electrode and the plastic 62 on the lower negative electrode can be further restricted, reducing the possibility of the positive electrode post 2 and the negative electrode post 3 falling off.

[0047] In one or more embodiments, the top surface of the plastic 51 on the positive electrode is provided with a first recess 511 to accommodate the deformed positive electrode riveting part 22, and the top surface of the plastic 61 on the negative electrode is provided with a second recess 611 to accommodate the deformed negative electrode riveting part 32.

[0048] See Figure 7 , Figure 8 When the positive electrode riveting part 22 is deformed by pressure, the positive electrode riveting part 22 is at least partially located in the first sink 511. The top surface of the positive electrode riveting part 22 after being deformed by pressure does not exceed the top surface of the plastic 51 on the positive electrode, thereby reducing the risk of the positive electrode riveting part 22 being lifted by pressure deformation, and further reducing the possibility of the positive electrode post 2 falling off the cover plate 1 in this application.

[0049] See Figure 2 , Figure 3 , Figure 7 , Figure 8 When the negative electrode riveting part 32 is deformed by pressure, the negative electrode riveting part 32 is at least partially located in the second recess 611 of the plastic 61 on the negative electrode. The top surface of the negative electrode riveting part 32 after being deformed by pressure does not exceed the top surface of the plastic 61 on the negative electrode, so as to reduce the risk of the deformed negative electrode riveting part 32 being lifted up, and further reduce the possibility of the negative electrode post 3 falling off the cover plate 1 in this application.

[0050] In one or more embodiments, a first insulating element 71 is sandwiched between the positive electrode post 2, the lower positive electrode plastic 52 and the cover plate 1, and a second insulating element 72 is sandwiched between the negative electrode post 3, the lower negative electrode plastic 62 and the cover plate 1.

[0051] See Figure 2 During assembly, the first insulating component 71 is first placed under the cover plate 1 at the first through hole, followed by the lower positive electrode plastic 52. Then, the vertical portion of the positive electrode post 2 sequentially passes through the lower positive electrode plastic 52, the first insulating component 71, the cover plate 1, and the upper positive electrode plastic 51. The horizontal portion of the positive electrode post 2 can press the upper positive electrode plastic 51 and the first insulating component 71 together. It should be noted that the negative electrode post 3, the lower negative electrode plastic 62, the cover plate 1, and the second insulating component 72 adopt the same assembly method. The first insulating component 71 can further prevent the positive electrode post 2 from conducting with the cover plate 1, and the second insulating component 72 can further prevent the negative electrode post 3 from conducting with the cover plate 1.

[0052] In one or more embodiments, the positive electrode post 2 is a one-piece stamped electrode post made of aluminum. The one-piece stamping of the positive electrode post 2 has the characteristics of high production efficiency and low cost.

[0053] In one or more embodiments, the negative electrode post 3 is a stamped electrode post formed from a copper-aluminum composite sheet. By stamping the negative electrode post 3 from a copper-aluminum composite sheet, the copper and aluminum posts can be replaced by friction welding, reducing the risk of breakage at the copper-aluminum interface of the negative electrode post 3, and featuring high forming efficiency and low cost.

[0054] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A power battery cover, characterized in that, include: Cover plate; A positive electrode post, the top surface of which is provided with a positive electrode riveting groove, the outer side of which forms a positive electrode riveting part, and the positive electrode post is riveted and fixed to the cover plate through the positive electrode riveting part; The negative electrode post has a negative electrode riveting groove on its top surface and a negative electrode riveting part is formed on the outer side of the negative electrode riveting groove. The negative electrode post is riveted and fixed to the cover plate by the negative electrode riveting part.

2. The power battery cover plate according to claim 1, characterized in that: The positive electrode injection molded part includes an upper positive electrode plastic disposed on the upper side of the cover plate and a lower positive electrode plastic disposed on the lower side of the cover plate. The positive electrode post passes through the lower positive electrode plastic, the cover plate and the upper positive electrode plastic in sequence. By applying an external force toward the cover plate to the positive electrode riveting part, the positive electrode riveting part is cold-plastically deformed, pressing the upper positive electrode plastic onto the cover plate. The negative electrode injection molded part includes an upper negative electrode plastic disposed on the upper side of the cover plate and a lower negative electrode plastic disposed on the lower side of the cover plate. The negative electrode post passes through the lower negative electrode plastic, the cover plate and the upper negative electrode plastic in sequence. By applying an external force toward the cover plate to the negative electrode riveting part, the negative electrode riveting part is cold-plastically deformed, pressing the upper negative electrode plastic onto the cover plate.

3. The power battery cover plate according to claim 1, characterized in that: The positive electrode riveting groove and the negative electrode riveting groove are closed ring structures, or are composed of multiple groove segments distributed circumferentially; the cross-sectional shape of the closed ring structure is circular, rectangular or polygonal.

4. The power battery cover according to claim 1 or 3, characterized in that: The radial width of the positive electrode riveting part and the negative electrode riveting part is 0.5-2mm.

5. The power battery cover according to claim 4, characterized in that: The axial height of the positive electrode riveting part and the negative electrode riveting part is 1-3mm.

6. The power battery cover according to claim 2, characterized in that: The top surface of the cover plate is provided with a first step structure for positioning the plastic on the positive electrode and a second step structure for positioning the plastic on the negative electrode.

7. The power battery cover according to claim 2, characterized in that: The positive electrode has a first groove on its plastic top surface to accommodate the deformed positive electrode riveting part, and the negative electrode has a second groove on its plastic top surface to accommodate the deformed negative electrode riveting part.

8. The power battery cover according to claim 2, characterized in that: A first insulating element is sandwiched between the positive electrode post, the lower plastic of the positive electrode, and the cover plate, and a second insulating element is sandwiched between the negative electrode post, the lower plastic of the negative electrode, and the cover plate.

9. The power battery cover according to claim 1, characterized in that: The positive electrode post is a one-piece stamped electrode post made of aluminum.

10. The power battery cover according to claim 1 or 9, characterized in that: The negative electrode post is a stamped electrode post made of copper-aluminum composite plate.

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