Power battery top cover and manufacturing method thereof

Abstract

A power battery top cover, comprising a cover plate provided with a pole hole, a sealing ring installed around the pole hole, a riveting ring and an insulation body integrally injection molded together, and a pole crimped below the riveting ring and sealing the pole hole, the pole hole comprising a through hole, a recess formed on the outer periphery of the through hole from the surface of the cover plate, and a plurality of riveting columns formed upward from the surface of the recess, the sealing ring being installed on the recess around the through hole, the riveting ring comprising a riveting surface fitted to the surface of the recess, a crimping inclined wall extending inward and upward from the middle of the riveting surface, and a plurality of riveting holes penetrating the riveting surface, the crimping inclined surface being pressed by the crimping inclined wall and the insulation body thereon, and the riveting columns being riveted and fixed in the riveting holes. The application also comprises a manufacturing method of the power battery top cover.

Description

TECHNICAL FIELD

[0001] The application relates to the field of power batteries, and particularly relates to a power battery top cover and a manufacturing method thereof. BACKGROUND

[0002] A power battery comprises a plurality of battery monomers, a current collection assembly for connecting the battery monomers in parallel, and a pair of pole posts for electrically connecting the current collection assembly and transmitting electric energy. The power battery is internally filled with liquid substances such as electrolyte, and needs to maintain the sealing property. To maintain the sealing property, the power battery further comprises an outer shell, a top cover for sealing the outer shell, and the pole posts are fixed to the top cover and need to be electrically isolated by the cover plate of the top cover. The power battery top cover disclosed in the patent application No. 202110666517.4 of the People's Republic of China comprises a cover plate provided with a pole post hole, a riveting ring welded to the outer periphery of the pole post hole, a sealing ring, a pole post, and an insulating body integrally formed and fixed in the pole post hole and the riveting ring. In the manufacturing process of the top cover, the welding surface of the riveting ring is first welded and fixed to the recessed part of the pole post hole, then the sealing ring is sleeved around the pole post hole of the cover plate, and then the pole post is placed into the riveting ring from the top of the riveting ring and is pressed against the sealing ring. In this process, the top of the riveting ring is provided with a misaligned protruding part, the pole post is placed at a certain position and then rotated by a certain position to realize alignment and restriction, the pole post is positioned, and then injection molding is performed to fix the pole post in the riveting ring. The structure of the pole post and the riveting ring in the above scheme is complex, and the processing difficulty is high. At the same time, the assembly and manufacturing process is complex, which greatly increases the manufacturing cost. The cover plate needs to be placed in the mold together for injection molding, which increases the requirements on the injection molding equipment. SUMMARY

[0003] In view of this, it is necessary to provide a power battery top cover with good sealing property and easy manufacturing, and a manufacturing method thereof.

[0004] To solve the above technical problems, the application provides a power battery top cover, which comprises a cover plate provided with a pole hole, a sealing ring installed around the pole hole, a riveting ring and an insulating body integrally injection molded together, and a pole riveted to the lower part of the riveting ring and sealing the pole hole, wherein the pole hole comprises a through hole, a recess formed on the outer periphery of the through hole by being recessed from the surface of the cover plate, and a plurality of riveting columns formed by being protruded upward from the surface of the recess; the sealing ring is installed on the recess around the through hole; the riveting ring comprises a riveting surface attached to the surface of the recess, a riveting inclined wall formed by being torn from the middle of the riveting surface and extending inward and upward, and a plurality of riveting holes penetrating through the riveting surface; the pole comprises an upper connecting part, a lower connecting part, and a riveting inclined surface formed between the upper connecting part and the lower connecting part; the lower connecting part is riveted to the sealing ring around the through hole and seals the through hole; the upper connecting part is exposed to the outside; the riveting inclined surface is pressed by the riveting inclined wall and the insulating body thereon; and the riveting columns are riveted and fixed in the riveting holes.

[0005] Preferably, the combination of the riveting ring and the insulating body forms an upper and lower open accommodating cavity in the riveting inclined wall, the lower end opening of the accommodating cavity is larger than the upper end opening, and the pole is installed in the accommodating cavity.

[0006] Preferably, the riveting inclined wall of the riveting ring and the riveting inclined surface of the pole are separated by the insulating body to electrically separate the riveting ring and the pole, and the lower connecting part of the pole is pressed on the sealing ring to electrically separate the pole and the cover plate.

[0007] Preferably, the recess is formed with a raised edge protruded upward from the outer periphery of the through hole, the top of the raised edge is higher than the surface of the recess and lower than the surface of the cover plate, the sealing ring comprises a riveting surface located on the upper side of the raised edge, a sleeve hole penetrating through the riveting surface, an inner side wall extending downward from both the inner and outer sides of the riveting surface, an outer side wall, and a buckling groove formed between the inner side wall and the outer side wall to accommodate the raised edge.

[0008] Preferably, the surface of the lower connecting part of the pole is pressed on the riveting surface of the sealing ring and extrudes the riveting surface with the raised edge to achieve sealing.

[0009] Preferably, the riveting surface of the riveting ring is limited in the recess, the riveting columns correspond to the riveting holes one by one and are riveted and fixed, and the riveting columns are of a tapered structure.

[0010] Preferably, a plurality of flow holes are formed through the connection between the riveting surface of the riveting ring and the riveting inclined wall, the flow holes are filled with the insulating body, and the insulating body comprises a base and a wrapping part extending obliquely inward and upward from the base and wrapping around both the inner and outer sides of the riveting inclined wall.

[0011] Preferably, a gap exists between the rivet post and the radially inner wall surface of the recess.

[0012] Preferably, the power battery top cover further comprises an inner shell assembled to the bottom of the cover plate, the inner shell comprising an inner shell body covering the bottom surface of the cover plate, a through hole formed through the inner shell body and corresponding to the through hole, and a plurality of hot melt posts formed extending upward from the inner shell body, the cover plate bottom surface being provided with a plurality of hot melt holes corresponding to positions of the hot melt posts, the hot melt posts being fixed by hot melting after extending into the hot melt holes, the hot melt holes being blind holes not penetrating through the upper surface of the cover plate.

[0013] To solve the above technical problems, the application further provides a manufacturing method of the power battery top cover, comprising the following steps:

[0014] S10, providing the riveting ring and injection molding the insulating body outside the riveting ring;

[0015] The pressure contact inclined wall is formed with an accommodating cavity with an upper and lower opening, and the inner wall surface of the accommodating cavity is covered by the insulating body to form a wrapping part;

[0016] S20, providing the pole post and loading the pole post upward into the accommodating cavity in the riveting ring and the wrapping part;

[0017] The pressure contact inclined surface of the pole post is tightly limited on the inner wall surface of the accommodating cavity and is electrically isolated from the riveting ring through the wrapping part;

[0018] S30, providing the cover plate and the sealing ring and assembling the sealing ring on the recessed part around the through hole; this step can be placed before S20 or S10;

[0019] S40, pressing the combination of the riveting ring loaded with the pole post and the insulating body downward into the recessed part, the rivet post of the cover plate is correspondingly inserted upward into the riveting hole, and the rivet post is expanded radially by being pressed downward to be fixed in the riveting hole.

[0020] The manufacturing method of the power battery top cover of the application first injection molds the riveting ring to form a combination of the riveting ring and the insulating body, and then assembles the combination to the cover plate and rivets and fixes by the rivet post and the riveting hole, avoiding the problem of high requirement for the machine and low efficiency of large injection molding caused by the in-mold injection molding of the entire cover plate assembly in the prior art; at the same time, the riveting ring and the pole post of the power battery top cover of the application are simpler in structure compared with the existing welded ring and pole post design, some complex machining structures are removed, and the manufacturing cost of the assembly is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0022] Figure 1 A perspective assembly view of the power battery top cover of the present application;

[0023] Figure 2 A perspective exploded view of the power battery top cover of the present application;

[0024] Figure 3 A perspective exploded view of the pole, the insulating body, the riveting ring and the sealing ring of the power battery top cover of the present application;

[0025] Figure 4 A perspective exploded view of the pole, the insulating body, the riveting ring and the sealing ring of the power battery top cover of the present application from another angle;

[0026] Figure 5 A sectional view of the combination of the insulating body and the riveting ring, the pole and the sealing ring of the power battery top cover of the present application;

[0027] Figure 6 A sectional view along the A-A line shown in Figure 1 .

[0028] Explanation of reference signs

[0029] Inner shell - 10; inner shell body - 11; hot melt column - 12; through hole - 13; fence - 14; liquid injection through hole - 15; end - 16; cover plate - 20; plate body - 21; pole hole - 22; perforation - 221; recess - 222; rivet column - 223; raised edge - 224; explosion-proof port - 23; liquid injection hole - 24; pole - 30; upper connecting part - 31; lower connecting part - 32; crimped inclined surface - 33; sealing ring - 40; crimping surface - 41; sleeve hole - 42; inner side wall - 43; outer side wall - 44; buckling groove - 45; riveting ring - 50; riveting surface - 51; riveting hole - 511; crimping inclined wall - 52; flow hole - 521; insulating body - 60; base - 61; wrapping part - 62; protective film - 72; explosion-proof sheet - 71; accommodating cavity - S. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0031] The present application is based on Figure 1The X direction shown is the lateral direction, the Y direction is the longitudinal direction, and the Z direction is the vertical direction.

[0032] Please continue to refer to Figure 1 , Figure 2 As shown, the power battery top cover of the application comprises a cover plate 20 provided with a pole hole 22, a riveting ring 50 riveted to the periphery of the pole hole 22, a sealing ring 40 sleeved on the upper periphery of the pole hole 22, a pole 30, an insulation body 60 integrally formed outside the riveting ring 50 and isolating the riveting ring 50 and the pole 30, and an inner shell 10 fixed to the bottom surface of the cover plate 20 by hot melting.

[0033] The cover plate 20 comprises a plate body 21, the pole hole 22 formed through the plate body 21, an anti-explosion port 23, and a liquid injection hole 24. The pole hole 22 comprises a through hole 221, a recessed portion 222 formed downward from the plate body 21 and located at the periphery of the through hole 221, a raised edge 224 formed upward from the periphery of the through hole 221, and a plurality of rivet columns 223 formed upward from the periphery of the recessed portion 222. The rivet columns 223 are uniformly distributed on the annular structure of the recessed portion 22, and there is a certain gap between the rivet columns 223 and the lateral inner wall of the recessed portion 222. In the initial state, the free end of the rivet column 223 is in a conical structure. The height of the raised edge 224 is not higher than the surface of the plate body 21.

[0034] The inner shell 10 comprises an inner shell body 11 covering the bottom surface of the plate body 21, a through hole 13 formed through the inner shell body 11 and corresponding to the through hole 221, a liquid injection through hole 15 formed through the inner shell body 11 corresponding to the liquid injection hole 24, a fence 14 formed below the anti-explosion port 23, and an end portion 16 covering the lateral sides of the plate body 21. The inner shell body 11 is extended upward to form a plurality of hot melting columns 12, and a plurality of hot melting holes (not shown) are formed on the bottom surface of the plate body 21 corresponding to the positions of the hot melting columns 12. After the hot melting columns 12 are inserted into the hot melting holes, they are fixed by hot melting. The hot melting holes are blind holes that do not penetrate the upper surface of the plate body 21. The middle position of the fence 14 is recessed downward and does not directly contact the bottom side of the anti-explosion port 23. The bottom side of the anti-explosion port 23 is welded with an anti-explosion sheet 71, and the top of the anti-explosion port 23 is fixed with a protective film 72.

[0035] Please continue to refer to Figures 2 to 6As shown, the pole column 30 includes a positive pole column and a negative pole column, each of which includes an upper connecting portion 31, a lower connecting portion 32 opposite to the upper connecting portion 31, and a crimping inclined surface 33 formed between the upper connecting portion 31 and the lower connecting portion 32. The outer diameter of the lower connecting portion 32 is greater than that of the upper connecting portion 31, so that the crimping inclined surface 33 has an inclined surface structure that expands outwardly and upwardly. The pole column 30 has no special structural design, and its outer shape can be manufactured by simple stamping. The positive pole column is made of aluminum alloy. The negative pole column is made of two materials combined together, that is, the upper half of the pole column 30 is made of aluminum alloy, and the lower half of the pole column 30 is made of copper alloy.

[0036] The riveting ring 50 includes a riveting surface 51 fitted to the surface of the recessed portion 222, a crimping inclined wall 52 extending obliquely inward and upward from the inner side of the riveting surface 51, a plurality of riveting holes 511 penetrating through the riveting surface 51, and a plurality of flow holes 521 provided at the connection between the crimping inclined wall 52 and the riveting surface 51. The outer diameter of the riveting surface 51 is not greater than the inner diameter of the recessed portion 222, so that the riveting surface 51 completely enters the recessed portion 222 downward. The riveting columns 223 upwardly protruding in the recessed portion 222 one-to-one correspond to the riveting holes 511 on the riveting surface 51, and the top ends of the riveting columns 223 protrude upwardly beyond the surface of the riveting holes 511. The riveting columns 223 need to be finally pressed downward for riveting, so that the riveting columns 223 are fixed in the riveting holes 511. At this time, the riveting holes 511 can be designed as an inclined surface structure to increase the holding force of the riveting columns 223 and the riveting holes 511 after riveting. The crimping inclined wall 52 extends obliquely inward and upward to form an inclined wall surface, and the inner diameter of the bottom of the crimping inclined wall 52 is greater than that of the top.

[0037] The insulating body 60 is integrally formed outside the riveting ring 50. Specifically, the riveting ring 50 is molded by in-mold injection, and the insulating body 60 is wrapped outside the riveting ring 50. The insulating body 60 includes a base 61 flush with the bottom surface of the riveting surface 51, and a wrapping portion 62 extending obliquely inward and upward from the base 61 and wrapped around the inner and outer sides of the crimping inclined wall 52. The inner side of the wrapping portion 62 has the same inclined surface structure as the crimping inclined wall 52. The top and bottom openings of the crimping inclined wall 52 of the riveting ring 50 and the wrapping portion 62 of the insulating body 60 are in an open state and form a containing cavity S containing the pole column 30.

[0038] The pole column 30 is upwardly fitted into the riveting ring 50 and the insulating body 60, and the upper connecting part 31 of the pole column 30 is exposed outside the top opening of the riveting ring 50 and the insulating body 60, and the lower connecting part 31 of the pole column 30 is exposed outside the bottom opening of the riveting ring 50 and the insulating body 60. The crimping inclined surface 33 of the pole column 30 is attached to the inner surface of the wrapping part 62, and the pole column 30 is fixed downwardly by the force of the crimping inclined wall 52 of the riveting ring 50, and the crimping inclined surface 33 of the pole column 30 and the crimping inclined wall 52 are insulated and electrically isolated by the wrapping part 62 of the insulating body 60.

[0039] The sealing ring 40 comprises a crimping surface 41, a sleeve hole 42 formed through the crimping surface 41, an inner side wall 43 and an outer side wall 44 respectively extending downwardly from both sides of the crimping surface 41, and a buckling groove 45 formed between the inner side wall 43 and the outer side wall 44. The vertical length of the inner side wall 43 is greater than the vertical length of the outer side wall 44. The sealing ring 40 is pressed into the flange 224 of the periphery of the through hole 221, that is, the flange 224 is buckled into the buckling groove 45, and the inner side wall 43 is attached to the inner wall surface of the through hole 221.

[0040] The pole column 30 is crimped downwardly on the crimping surface 41 of the sealing ring 40, specifically, the lower connecting part 32 closes the through hole 221, and the surface of the lower connecting part 32 is pressed on the crimping surface 41 of the sealing ring 40 to achieve sealing.

[0041] In the design of the cover plate 20, the pole column 30 and the riveting ring 50 of the power battery top cover, the structure design of the components is simplified to the greatest extent, and the machining difficulty and machining cost caused by the complication of components are avoided as much as possible. Compared with the structure of the pole column and the welding ring in the prior art, the power battery top cover is easier to process, and the manufacturing cost is greatly reduced while ensuring reliability.

[0042] The manufacturing method of the power battery top cover comprises the following steps:

[0043] S10, providing a riveting ring 50, and injection molding an insulating body 60 outside the riveting ring 50;

[0044] In this step, the insulating ring 50 includes a riveting surface 51 in a horizontal annular structure and a compression inclined wall 52 extending obliquely upward from the riveting surface 51. A plurality of riveting holes 511 are uniformly formed in the riveting surface 51. The insulating body 60 is wrapped around the riveting ring 50, and the compression inclined wall 52 is wrapped with the insulating body 60 on both the inner and outer sides to form a wrapped part 62. The wrapped part 62 is attached to one side of the inner surface of the compression inclined wall 52 to electrically isolate the riveting ring 50 and the pole 30. The combination of the riveting ring 50 and the insulating body 60 is open at the top and bottom, and an upper and lower open accommodating cavity S is formed in the compression inclined wall 52.

[0045] S20, providing a pole 30, and loading the pole 30 into the accommodating cavity S in the riveting ring 50 and the wrapped part 62;

[0046] In this step, the pole 30 includes an upper connecting part 31 exposed outside the top of the accommodating cavity S, a lower connecting part 32 exposed outside the bottom of the accommodating cavity S, and a compression inclined surface 33 formed between the upper connecting part 31 and the lower connecting part 32. After the pole 30 is loaded into the accommodating cavity S, the compression inclined surface 33 of the pole 30 is held below the compression inclined wall 52 and is electrically isolated from the riveting ring 50 by the wrapped part 62 of the insulating body 60.

[0047] S30, providing a cover plate 21 with a pole hole 22 formed therethrough and a sealing ring 40, and assembling the sealing ring 40 on the pole hole 22; this step can be placed before S20 or S10;

[0048] The cover plate 20 includes a plate body 21 and a pole hole 22 formed through the plate body 21. The pole hole 22 includes a through hole 221 passing through the upper and lower parts, a recessed part 222 recessed downward from the plate body 21 and located at the outer periphery of the through hole 221, a raised edge 224 protruding upward from the periphery of the through hole 221, and a plurality of rivet columns 223 protruding upward from the outer periphery of the recessed part 222. The rivet columns 223 are uniformly distributed on the annular structure of the recessed part 22, and there is a certain gap between the rivet columns 223 and the lateral inner wall of the recessed part 222. In the initial state, the free end of the rivet column 223 is in a conical structure. The height of the raised edge 224 is not higher than the surface of the plate body 21.

[0049] The sealing ring 40 includes a compression surface 41, a sleeve hole 42 formed through the compression surface 41, an inner side wall 43 and an outer side wall 44 extending downward from the radial two sides of the compression surface 41, and a buckling groove 45 formed between the inner side wall 43 and the outer side wall 44. The vertical length of the inner side wall 43 is greater than the vertical length of the outer side wall 44.

[0050] The convex edge 224 is clamped into the clamping groove 45 of the sealing ring 40, the sleeve hole 42 corresponds to the through hole 221, the inner side wall 43 is attached to the inner wall surface of the through hole 221, and the outer side wall 44 is attached to the radial outer wall surface of the convex edge 224.

[0051] S40, the combination of the riveting ring 50 loaded in the pole 30 and the insulating body 60 is pressed downward into the recess 222, the rivet column 223 of the cover plate 20 is correspondingly inserted upward into the riveting hole 511, and the rivet column 223 is pressed downward to expand radially and be fixed in the riveting hole 511;

[0052] In this step, the lower connecting part 32 of the pole 30 is supported on the crimping surface 41 of the sealing ring 40 around the through hole 221 to seal the through hole 221, and the crimping inclined surface 33 of the pole 30 is pressed downward by the crimping inclined wall 52, 62 formed by the combination of the riveting ring 50 and the insulating body 60 to tightly press the crimping surface 41 of the sealing ring 40.

[0053] The manufacturing method of the power battery top cover of the application first injection molds the riveting ring 50 to form the combination of the riveting ring 50 and the insulating body 60, and then assembles the combination to the cover plate 20 and fixes it by the rivet column 223 and the riveting hole 511, avoiding the problem of high requirement for the machine and low efficiency of large injection molding in the prior art. At the same time, compared with the structure of the existing welding ring and the pole, the riveting ring 50 of the power battery top cover of the application is simpler, some complex machining structures are removed, and the manufacturing cost of the assembly is reduced.

[0054] The technical features of the above embodiments can be combined in any way. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0055] The above embodiments only express the preferred embodiments of the application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A power battery top cover, characterized in that: The invention comprises a cover plate provided with a pole hole, a sealing ring installed on the periphery of the pole hole, a rivet ring and an insulating body integrally injection-molded together, and a pole pressed under the rivet ring and sealing the pole hole. The pole hole comprises a through-hole and a recessed portion formed on the outer periphery of the through-hole from the surface of the cover plate, and a plurality of rivet posts protruding upward from the surface of the recessed portion. The sealing ring is installed on the recessed portion on the periphery of the through-hole. The rivet ring comprises a rivet surface attached to the surface of the recessed portion, a crimping inclined wall torn from the middle of the rivet surface and extending inward and upward, and a plurality of rivet holes passing through the rivet surface. The pole comprises an upper connecting portion, a lower connecting portion, and a crimped inclined surface formed between the upper connecting portion and the lower connecting portion. The periphery of the lower connecting portion is crimped on the sealing ring and seals the through-hole. The upper connecting portion is exposed to the outside, the crimped inclined surface is pressed by the crimping inclined wall and the insulating body thereon, and the rivet posts are riveted into the rivet holes and fixed.

2. The power battery top cover according to claim 1, characterized in that: The combination of the riveting ring and the insulating body forms an accommodating cavity with upper and lower openings in the crimping inclined wall. The lower end opening of the accommodating cavity is larger than the upper end opening, and the pole is installed in the accommodating cavity.

3. The power battery top cover according to claim 2, characterized in that: The insulating body is spaced between the crimping inclined wall of the rivet ring and the crimped inclined surface of the pole to electrically isolate the rivet ring and the pole. The lower connecting portion of the pole is pressed on the sealing ring to electrically isolate the pole and the cover plate.

4. The power battery top cover according to claim 3, characterized in that: The recessed portion is located at the outer edge of the perforation and protrudes upward to form a convex edge. The top of the convex edge is higher than the surface of the recessed portion and lower than the surface of the cover plate. The sealing ring includes a crimping surface located on the upper side of the convex edge, a sleeve hole formed through the crimping surface, an inner side wall extending downward from the inner and outer sides of the crimping surface, an outer side wall, and a buckle groove formed between the inner side wall and the outer side wall to accommodate the convex edge.

5. The power battery top cover according to claim 4, characterized in that: The lower connection portion surface of the pole is pressed against the crimping surface of the sealing ring and squeezes the crimping surface with the convex edge to achieve sealing.

6. The power battery top cover according to claim 5, characterized in that: The riveting surface of the riveting ring is limited in the recessed portion, the rivet studs correspond to the rivet holes one by one and are fixed by riveting, and the rivet studs are of a conical structure.

7. The power battery top cover according to claim 6, characterized in that: A plurality of flow holes are formed through the connection between the riveted surface of the riveted ring and the crimped inclined wall, and the insulating body fills the flow holes. The insulating body includes a base and a wrapping portion extending obliquely inward and upward from the base and wrapping around the inner and outer sides of the crimped inclined wall.

8. The power battery top cover according to claim 7, characterized in that: There is a gap between the rivet column and the radial inner wall surface of the recessed portion.

9. The power battery top cover according to claim 8, characterized in that: The power battery top cover also includes an inner shell assembled on the bottom of the cover plate, the inner shell includes an inner shell covering the bottom surface of the cover plate, a through hole penetrating the inner shell and corresponding to the perforation, and a plurality of heat-melt columns extending upward from the inner shell. A plurality of heat-melt holes are opened on the bottom surface of the cover plate at positions corresponding to the heat-melt columns. The heat-melt columns are inserted into the heat-melt holes and fixed by heat-melting. The heat-melt holes are blind holes that do not penetrate the upper surface of the cover plate.

10. The method for manufacturing a power battery top cover according to claim 1, wherein: The steps include: S10, providing the riveted ring, and injection molding the insulating body outside the riveted ring; An accommodating cavity with upper and lower openings is formed in the crimping inclined wall, and the inner wall surface of the accommodating cavity is covered by the insulating body to form a wrapping portion; S20, providing the pole, and installing the pole upward into the accommodating cavity within the riveting ring and the wrapping portion; The crimped inclined surface of the pole is tightly confined to the inner wall surface of the accommodating cavity and is electrically isolated from the riveted ring by the wrapping portion; S30, providing the cover plate and the sealing ring, and assembling the sealing ring on the recessed portion around the perforation; this step can also be placed before S20 or S10; S40, pressing the combination of the rivet ring and the insulating body installed in the pole downward into the recessed portion, inserting the rivet studs of the cover plate upward into the corresponding rivet holes, and squeezing the rivet studs downward to expand radially and be fixed in the rivet holes.

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