CN220984807U

CN220984807U - Battery top cover structure and battery

Info

Publication number: CN220984807U
Application number: CN202322299706.XU
Authority: CN
Inventors: 靳玲玲; 李俊义; 刘建明
Original assignee: Zhuhai Cosmx Power Battery Co Ltd
Current assignee: Zhuhai Cosmx Power Battery Co Ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-05-17
Anticipated expiration: 2033-08-25

Abstract

The application relates to the technical field of new energy batteries, in particular to a battery top cover structure and a battery. The battery top cover structure comprises a pole, a top cover plate, upper plastic and a gasket, wherein the first corner, the second corner and the third corner are positioned in a preset included angle range taking the fourth corner as an endpoint, the preset included angle range is composed of a first ray and a second ray, the expression of the first ray is y ₁＝kx+b₁, and the expression of the second ray is y ₂＝kx+b₂; wherein, k is more than or equal to 20 and more than or equal to 0, and b ₁>b₂ -5 is more than or equal to 5. Can make the assembly of top cap piece and last plastic simpler and the turn-ups yield of first bellying high. When the first corner, the second corner and the third corner are located outside the two rays y ₁＝kx+b₁ and y ₂＝kx+b₂, the problem of difficult assembly of the top cover sheet and the upper plastic occurs, and the flanging yield of the first protruding portion is reduced.

Description

Battery top cover structure and battery

Technical Field

The application relates to the technical field of new energy batteries, in particular to a battery top cover structure and a battery.

Background

Under the large background of global energy conservation, emission reduction and sustainable development, new energy is expected to replace fossil energy, and the new energy technology is widely applied to the fields of automobiles, heavy trucks, agricultural unmanned aerial vehicles, electric tools and the like.

The power battery has the characteristics of high energy density, long cycle life, no memory effect, environmental friendliness and the like, and is widely applied to plug-in hybrid electric vehicles, hybrid electric vehicles and pure electric vehicles. The energy storage battery is mainly used for solar power generation equipment and wind power generation equipment and can store renewable energy.

However, in the production and working processes of the power battery and the energy storage battery, in the current pole column installation process of the battery top cover, a welding process or a riveting process is mainly adopted to install and fix the pole column in the top cover, and the welding or riveting installation process has low product yield, easy sealing failure, complex process and high cost. Therefore, how to manufacture a battery top cover structure without welding or riveting is a technical problem that needs to be solved in the art.

Disclosure of utility model

In view of this, the application provides a battery top cover structure and a battery, which do not need to fix a pole by adopting welding, riveting and other processes, thereby improving the yield of product production and simplifying the production process.

In a first aspect, the present application provides a battery top cover structure, including: the pole comprises a column part and a first protruding part, and the first protruding part is arranged at the top end of the column part; a top cover sheet including a first through hole through which the column portion passes; the upper plastic comprises a first ring body and a second ring body which are connected with each other, the first ring body is positioned between the upper surface of the top cover sheet and the first protruding part, and the second ring body is at least partially positioned between the column body and the hole wall of the first through hole; the gasket is provided with a second through hole, the second through hole is sleeved on the column part, and the gasket is arranged between the lower surface of the first protruding part and the upper surface of the first ring body; the first corner is a corner at the upper junction between the first ring body and the second ring body, the second corner is a corner at the top of the second through hole, the third corner is a corner at the upper junction between the first protruding portion and the column portion, and the fourth corner is a corner at the top of the first through hole; the preset included angle range is formed by a first ray and a second ray, the first ray and the second ray are based on a preset coordinate system, the preset coordinate system takes the fourth corner as a coordinate origin and a plumb face as an X-Y plane, the expression of the first ray is Y ₁＝kx+b₁, and the expression of the second ray is Y ₂＝kx+b₂; wherein, k is more than or equal to 20 and more than or equal to 0, and b ₁>b₂ -5 is more than or equal to 5.

When the lug boss is used, the first lug boss is formed through the flanging process, the pole post is limited and fixed from the upper part through the top cover plate and the upper plastic, and the pole post is fixed without adopting the processes of welding, riveting and the like, so that the yield of product production is improved, and the production process is simplified. The gasket is interposed between the first protruding portion and the upper plastic, so that the upper plastic can be protected from direct pressure of the first protruding portion in the flanging process. The preset included angle range can limit the assembly size, can adjust the assembly difficulty of the top cover sheet and the upper plastic, and controls the flanging yield of the first protruding part. When the first corner, the second corner and the third corner are located between the two rays y ₁＝kx+b₁ and y ₂＝kx+b₂, the assembly of the top cover sheet and the upper plastic is easier and the flanging yield of the first protruding portion is high. When the first corner, the second corner and the third corner are located outside the two rays y ₁＝kx+b₁ and y ₂＝kx+b₂, the problem of difficult assembly of the top cover sheet and the upper plastic occurs, and the flanging yield of the first protruding portion is reduced.

With reference to the first aspect, in one possible implementation manner, the pole further includes a second protruding portion, where the second protruding portion is disposed on a peripheral surface of the bottom of the column portion; wherein, this battery top cap structure still includes: the lower plastic comprises a third through hole, the third through hole is used for being sleeved on the column part, the cross section of the inner edge of the third through hole is oblique or arc, and the caliber of the third through hole gradually increases or gradually decreases along the direction of the first protruding part towards the second protruding part; and the sealing ring is sleeved on the pole, and the sealing ring is positioned between the third through hole and the pole.

With reference to the first aspect, in a possible implementation manner, the top cover sheet includes a positioning recess disposed around the first through hole, the positioning recess is recessed in a top surface of the top cover sheet, and the positioning recess is configured to limit the upper plastic.

With reference to the first aspect, in a possible implementation manner, the lower plastic includes a third protruding portion disposed around the third through hole, the third protruding portion protruding from a top surface of the lower plastic, and the third protruding portion is configured to form a recessed area on a bottom surface of the lower plastic, and an edge profile of the recessed area matches an edge profile of the second protruding portion.

With reference to the first aspect, in one possible implementation manner, a thickness of the sealing ring is greater than or equal to a thickness of the third protrusion.

With reference to the first aspect, in a possible implementation manner, the top cover sheet includes a recess disposed around the first through hole, the recess is recessed in a bottom surface of the top cover sheet, and an edge contour of the recess matches an edge contour of the third protrusion.

With reference to the first aspect, in one possible implementation manner, a ratio of a pore diameter of the first through hole to a sum of dimensions, which is a sum of a diameter of the cylinder portion and a wall thickness of the second ring body, is greater than 1.

With reference to the first aspect, in one possible implementation manner, a ratio of an outer diameter of the spacer and an aperture of the first through hole is greater than or equal to 1 and less than or equal to 2.

With reference to the first aspect, in one possible implementation manner, a wall thickness of the second ring body is greater than or equal to 0.1mm and less than or equal to 3mm.

With reference to the first aspect, in one possible implementation manner, the pole further includes a fourth protruding portion, and the fourth protruding portion is disposed on a top surface of the column portion.

With reference to the first aspect, in a possible implementation manner, an annular groove is provided between the fourth protruding portion and the first protruding portion.

With reference to the first aspect, in a possible implementation manner, a cross-sectional shape of a wall surface of the annular groove facing to the outer side is an oblique line or an arc line.

With reference to the first aspect, in one possible implementation manner, the method further includes: the shape of the first auxiliary gasket is annular, the first auxiliary gasket is arranged at the bottom of the gasket, and the first auxiliary gasket is embedded between the column part and the second ring body.

With reference to the first aspect, in one possible implementation manner, the upper plastic further includes: and the third ring body is arranged on the top surface of the second ring body, and the third ring body surrounds the outer side of the first protruding part.

With reference to the first aspect, in one possible implementation manner, the method further includes: the shape of the second auxiliary gasket is annular, the second auxiliary gasket is arranged at the top of the gasket, and the second auxiliary gasket is embedded between the first protruding part and the third ring body.

In a second aspect, the present application provides a battery comprising a battery top cover structure as described in any one of the preceding claims.

The second aspect includes the first aspect, and technical effects of the second aspect are not described herein.

Drawings

Fig. 1 is a schematic structural diagram of a battery top cover structure according to an embodiment of the application.

Fig. 2 is a schematic view of a portion of a top cover structure of a battery according to another embodiment of the present application.

Fig. 3 is a schematic structural view of a pole in a battery top cover structure according to another embodiment of the present application.

Fig. 4 is a schematic cross-sectional view of fig. 3.

Fig. 5 is a schematic view showing a part of a top cover structure of a battery according to another embodiment of the application.

Fig. 6 is a schematic structural diagram of a gasket in a battery top cover structure according to an embodiment of the application.

Fig. 7 is a schematic structural diagram of a gasket in a battery top cover structure according to another embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

An exemplary battery top cover structure is as follows:

Fig. 1 is a schematic structural diagram of a battery top cover structure according to an embodiment of the application. Fig. 2 is a schematic view of a portion of a top cover structure of a battery according to another embodiment of the present application. Fig. 3 is a schematic structural view of a pole in a battery top cover structure according to another embodiment of the present application. Fig. 4 is a schematic cross-sectional view of fig. 3. The application provides a battery top cover structure, which is shown by referring to fig. 1, 2, 3 and 4, and comprises a pole 2, a top cover plate 1, an upper plastic 6 and a gasket 3.

The pole 2 includes a cylindrical portion 20 and a first protruding portion 21, and the first protruding portion 21 is provided at the tip end of the cylindrical portion 20. The top sheet 1 comprises a first through hole 11, said column portion 20 passing through said first through hole 11. The upper plastic 4 comprises a first ring 41 and a second ring 42 which are connected with each other, the first ring 41 is located between the upper surface of the top cover sheet 1 and the first protruding portion 21, and the second ring 42 is located at least partially between the column portion 20 and the wall of the first through hole 11. The gasket 3 is provided with a second through hole, the second through hole is sleeved on the column part 20, and the gasket 3 is arranged between the lower surface of the first protruding part 21 and the upper surface of the first ring body 41. Wherein a first corner, a second corner and a third corner are located in a preset included angle range taking a fourth corner as an end point, the first corner is an upper junction between the first ring body 41 and the second ring body 42, the second corner is a corner at the top of the second through hole, the third corner is an upper junction between the first protruding portion 21 and the column portion 20, and the fourth corner is a corner at the top of the first through hole 11; the preset included angle range is formed by a first ray and a second ray, the first ray and the second ray are based on a preset coordinate system, the preset coordinate system takes the fourth corner as a coordinate origin and a plumb face as an X-Y plane, the expression of the first ray is Y ₁＝kx+b₁, and the expression of the second ray is Y ₂＝kx+b₂; wherein, k is more than or equal to 20 and more than or equal to 0, and b ₁>b₂ -5 is more than or equal to 5.

When the embodiment is applied, the first protruding part 21 is formed through a flanging process, the pole 2 is limited and fixed from above through the top cover plate 1 and the upper plastic 4, and the pole is fixed without adopting welding, riveting and other processes, so that the yield of product production is improved, and the production process is simplified. The upper plastic 4 can be protected from the direct pressure of the first boss 21 during the flanging process by the interposition of the gasket 3 between the first boss 21 and the upper plastic 4. The preset angle range can limit the assembly size, can adjust the assembly difficulty of the top cover sheet 1 and the upper plastic 4, and control the flanging yield of the first protruding portion 21. When the first corner, the second corner and the third corner are located between the two rays y ₁＝kx+b₁ and y ₂＝kx+b₂, the assembly of the top cover sheet 1 and the upper plastic 4 is easier and the flanging yield of the first boss 21 is high. When the first, second and third corners are located outside the two rays y ₁＝kx+b₁ and y ₂＝kx+b₂, the problem of difficult assembly of the top sheet 1 and the upper plastic 4 occurs and the burring yield of the first boss 21 is lowered.

Preferably, the first set of preferred parameters for the first ray and the second ray are: k=0.1, b ₁＝3、b₂ = -3; the second set of preferred parameters for the first ray and the second ray are: k=10, b ₁＝4、b₂ = -4, under these two sets of preferred parameters, the assembly of the cover sheet 1 and the upper plastic 4 is easier and the flanging yield of the first bulge 21 is high.

In one embodiment, referring to fig. 1, 2, 3 and 4, the battery top cover structure comprises a pole 2, a lower plastic 6, a sealing ring 5, a top cover 1, an upper plastic 6 and a gasket 3.

The pole 2 includes a cylindrical portion 20, a first protruding portion 21 and a second protruding portion 22, the first protruding portion 21 is formed at the top end of the cylindrical portion 20 through a flanging process, the second protruding portion 22 is located at the bottom of the cylindrical portion 20, and the second protruding portion 22 protrudes on the circumferential surface of the cylindrical portion 20. Specifically, the cylindrical portion 20 is cylindrical, the shape of the second protruding portion 22 is not limited, the first protruding portion 21 is formed on the top of the cylindrical portion 20 by a flanging process, and the first protruding portion 21 may be a ring.

The lower plastic 6 includes a third through hole 60, the column portion 20 passes through the third through hole 60, the lower plastic 6 is configured to limit the second protrusion portion 22 below the third through hole 60, the cross-sectional shape of the inner edge of the third through hole 60 is a slant line or an arc line, and the caliber of the third through hole 60 gradually increases or gradually decreases along the direction of the first protrusion portion 21 toward the second protrusion portion 22.

The sealing ring 5 is sleeved on the column part 20, the diameter of the outer ring of the sealing ring 5 is larger than that of the third through hole 60, and the sealing ring is positioned between the second protruding part 22 and the bottom surface of the lower plastic 6.

The top cover sheet 1 is arranged on the top surface of the lower plastic 6, the top cover sheet 1 comprising a first through hole 11 through which the column portion 20 passes.

The upper plastic 4 comprises a first ring body 41 and a second ring body 42, the first ring body 41 is connected to the outer peripheral surface of the second ring body 42, the first ring body 41 stretches into a first gap, the second ring body 42 stretches into a second gap, the first gap is a gap between the first protruding portion 21 and the top cover sheet 1, and the second gap is a gap between the first through hole 11 and the column body 20.

The gasket 3 is annular in shape, the gasket 3 is sleeved on the column portion 20, and the gasket 3 is arranged between the lower surface of the first protruding portion 21 and the upper surface of the upper plastic.

Wherein the first corner, the second corner and the third corner are located in a preset included angle range taking the fourth corner as an end point, the first corner is a corner where the first ring body 41 and the second ring body 42 intersect, the second corner is a corner at the top of the hole of the gasket 3, the third corner is a corner where the first protruding portion 21 and the column portion 20 intersect, and the fourth corner is a corner at the top of the first through hole 11.

When the method is applied, the first protruding portion 21 is formed through a flanging process, the polar column 2 is limited and fixed from the lower side through the lower plastic 6, the polar column 2 is limited and fixed from the upper side through the top cover plate 1 and the upper plastic 4, and the polar column is not required to be fixed through welding, riveting and other processes, so that the yield of product production is improved, and the production process is simplified. The gap between the pole 2 and the lower plastic 6 is sealed by a sealing ring 5. Since the cross-sectional shape of the inner edge of the third through hole 60 is a slant line or an arc line, the caliber of the third through hole 60 gradually increases or gradually decreases from top to bottom, so that the creepage distance between the pole 2 and the top cover sheet 1 in the up-down direction can be increased, and the short circuit probability between the pole 2 and the top cover sheet 1 can be reduced. In addition, during the flanging process, the first protruding portion 21 gradually turns out and presses down the gasket 3, the upper plastic 4, the top cover sheet 1 and the sealing ring 5, and the sealing ring 5 gradually spreads and expands towards the third through hole 60 in the process of being extruded, so that the sealing ring 5 gradually fills the gap formed by the third through hole 60, the second protruding portion 22, the top cover sheet 1 and the second ring body 42, and during the period, the third through hole 60 with a cross section being a diagonal line or an arc line gradually contacts with the sealing ring 5 which gradually expands, so that the stress of the sealing ring 5 is uniform in the process of filling, and burrs, cracks, scraps and the like are prevented from being formed on the contact surface of the sealing ring 5 and the third through hole 60. Moreover, the gasket 3 is interposed between the first protruding portion 21 and the upper plastic 4, so that the upper plastic 4 can be protected from direct pressure of the first protruding portion 21 during the flanging process. The preset angle range can limit the assembly size, can adjust the assembly difficulty of the top cover sheet 1 and the upper plastic 4, and control the flanging yield of the first protruding portion 21.

In one embodiment, as shown in fig. 1, the top cover sheet 1 and the lower plastic 6 are of a long plate type structure, and the battery top cover structure further comprises an explosion-proof valve 7 and an explosion-proof valve protection sheet 8, and a hole channel for installing the explosion-proof valve 7 and the explosion-proof valve protection sheet 8 is arranged in the middle of the top cover sheet 1.

Specifically, referring to fig. 1, when the battery top cover structure is assembled, the non-flanged pole 2 is first inserted into the third through hole 60 from the lower side of the lower plastic 6, then the sealing ring 5 is sleeved on the column portion 20, then the first through hole 11 of the top cover 1 is sleeved on the column portion 20 from above, then the upper plastic 4 and the gasket 3 are sleeved in sequence from above, finally the flanging process is performed, and the first protruding portion 21 is turned over by 90 degrees to press the gasket 3.

In one embodiment, as shown in fig. 5, the top cover sheet comprises a positioning recess 10 arranged around the first through hole 11, the positioning recess 10 is recessed in the top surface of the top cover sheet 1, and the positioning recess 10 is configured to limit the upper plastic 4. The positioning recess 10 can reduce the protruding height of the pole 2 upward while limiting the upper plastic 4, thereby reducing the overall height of the battery top cover structure. When the upper plastic 4 further includes the third ring 43, the positioning recess 10 is used for limiting the outer peripheral surface of the third ring 43.

Fig. 5 is a schematic view showing a part of a top cover structure of a battery according to another embodiment of the application. In one embodiment, as shown in fig. 5, the lower plastic 6 includes a third protrusion 61 disposed around the third through hole 60, the third protrusion 61 protrudes from the top surface of the lower plastic 6, and the third protrusion 61 is configured to form a concave region 62 on the bottom surface of the lower plastic 6, and the edge profile of the concave region 62 matches the edge profile of the second protrusion 22. The second protruding portion 22 can be limited from the periphery through the concave region 62, so that the pole 2 and the lower plastic 5 are prevented from being displaced relatively.

In an embodiment, the thickness of the sealing ring 5 is greater than or equal to the thickness of the third protruding portion 61, so that the sealing ring 5 can be extruded and expanded when the first protruding portion 21 is pressed downwards during the flanging process, and thus tightness between the lower plastic 6 and the pole 2 is ensured.

In an embodiment, the top cover sheet 1 comprises a recess 12 arranged around the first through hole 11, the recess 12 is recessed in the bottom surface of the top cover sheet 1, and the edge contour of the recess 12 matches the edge contour of the third protruding portion 61. The third protruding portion 61 is limited from the periphery through the concave portion 12, so that the relative displacement of the top cover sheet 1 and the lower plastic 6 is avoided.

In one embodiment, referring to fig. 2 and 5, the ratio of the inner aperture of the gasket 3 to the diameter L4 of the cylindrical portion 20 is greater than or equal to 1 and less than or equal to 1.5. Ensuring that the gasket 3 can play a good supporting role, and when the ratio is smaller than 1, the gasket 3 cannot be assembled and sleeved on the column part 20; when the ratio is greater than 1.5, the gap between the gasket 3 and the column portion 20 is too large to effectively receive the folding pressure from the first boss 21, and thus the upper plastic 4 cannot be effectively protected.

In one embodiment, referring to fig. 2, the first boss 21 is annular in shape, and the ratio of the outer diameter L3 of the first boss 21 to the outer diameter of the gasket 3 is greater than or equal to 1 and less than or equal to 1.5. Preventing the spacer 3 from being too large, when the ratio is less than 1, the outer side wall of the spacer 3 protrudes from the outer side wall of the first boss to cause difficulty in assembly; when L3/M1>1.5, the outer side wall of the gasket 3 is far away from the outer side wall of the first boss, and residual dirt is easy to accumulate.

In one embodiment, referring to fig. 5, the ratio of the aperture of the first through hole 11 to the sum of the dimensions, which is the sum of the diameter L4 of the cylindrical portion 20 and the wall thickness D1 of the second ring body 42 in the horizontal direction, is greater than 1. When the ratio is less than or equal to 1, there may be a case where the assembly is difficult or even impossible.

In one embodiment, the ratio of the outer diameter of the spacer 3 to the aperture of the first through hole 11 is greater than or equal to 1 and less than or equal to 2. When the ratio is less than 1, the spacer 3 is too small; when the ratio is greater than 2, the gasket 3 is excessively large, resulting in waste of material.

In one embodiment, the wall thickness of the second ring body 42 is greater than or equal to 0.1mm and less than or equal to 3mm. The wall thickness is smaller than 0.1mm, so that the wall thickness is too thin, and the structural strength and the insulativity of the upper plastic 4 cannot meet the requirements; the wall thickness of more than 3mm results in too thick wall thickness, which causes material waste and increases the cost.

In one embodiment, as shown in fig. 3 and 4, the pole 2 further includes a fourth protrusion 23, and the fourth protrusion 23 is disposed on the top surface of the cylinder portion 20. The fourth protrusion 23 protruding from the top surface of the pillar 20 facilitates bus bar welding.

In an embodiment, an annular groove 24 is provided between the fourth boss 23 and the first boss 21, the annular groove 24 is used as an acting point of flanging device, the first boss 21 before flanging is in an initial state of a circular ring standing on the top surface of the cylinder 20, the acting point of flanging device is abutted in the annular groove 24, and then the first boss 21 in the initial state is pushed outwards, so that the first boss 21 is gradually turned outwards by 90 degrees, and the state in fig. 2-5 is formed.

In one embodiment, as shown in fig. 4, the cross-sectional shape of the wall surface of the annular groove 24 facing the outside is a diagonal line or an arc line, that is, the boundary transition portion between the first protruding portion 21 and the column portion 20 forms a diagonal line or an arc line during the folding process of the first protruding portion 21.

Fig. 6 is a schematic structural diagram of a gasket in a battery top cover structure according to an embodiment of the application. In an embodiment, as shown in fig. 6, the battery top cover structure further includes a first auxiliary gasket 30, the first auxiliary gasket 30 is annular, the first auxiliary gasket 30 is connected to the bottom of the gasket 3, the first auxiliary gasket 30 is embedded between the column portion 20 and the second ring 42, and the first auxiliary gasket 30 can protect the second ring 42 of the upper plastic 4 to prevent the upper plastic 4 from cracking.

In an embodiment, as shown in fig. 2, the upper plastic 4 further includes a third ring 43, the third ring 43 is disposed on the top surface of the second ring 42, the third ring 43 surrounds the outer side of the first protruding portion 21, and the third ring 43 can limit and fix the first protruding portion 21 from the periphery, so as to further avoid displacement between the upper plastic 4 and the pole 2.

Fig. 7 is a schematic structural diagram of a gasket in a battery top cover structure according to another embodiment of the present application. In an embodiment, as shown in fig. 7, the battery top cover structure further includes a second auxiliary gasket 31, the second auxiliary gasket 31 is annular, the second auxiliary gasket 31 is disposed on top of the gasket 3, the second auxiliary gasket 31 is embedded between the first boss 21 and the third ring 43, and the second auxiliary gasket 31 can protect the third ring 43 to prevent the upper plastic 4 from cracking.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the utility model. Thus, the present utility model is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features herein.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is to be construed as including any modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. A battery top cover structure, comprising:

A pole (2) comprising a column portion (20) and a first protruding portion (21), the first protruding portion (21) being provided at the top end of the column portion (20);

A top sheet (1) comprising a first through hole (11), said column portion (20) passing through said first through hole (11);

The upper plastic (4) comprises a first ring body (41) and a second ring body (42) which are connected with each other, the first ring body (41) is positioned between the upper surface of the top cover sheet (1) and the first protruding part (21), and the second ring body (42) is at least partially positioned between the column part (20) and the hole wall of the first through hole (11); and

The gasket (3) is provided with a second through hole, the second through hole is sleeved on the column part (20), and the gasket (3) is arranged between the lower surface of the first protruding part (21) and the upper surface of the first ring body (41);

The first corner, the second corner and the third corner are located in a preset included angle range taking a fourth corner as an end point, the first corner is an upper junction between the first ring body (41) and the second ring body (42), the second corner is a corner of the top of the second through hole, the third corner is an upper junction between the first protruding portion (21) and the column portion (20), and the fourth corner is a corner of the top of the first through hole (11); the preset included angle range is formed by a first ray and a second ray, the first ray and the second ray are based on a preset coordinate system, the preset coordinate system takes the fourth corner as a coordinate origin and a plumb face as an X-Y plane, the expression of the first ray is Y ₁＝kx+b₁, and the expression of the second ray is Y ₂＝kx+b₂; wherein, k is more than or equal to 20 and more than or equal to 0, and b ₁>b₂ -5 is more than or equal to 5.

2. The battery top cover structure according to claim 1, wherein,

The pole (2) further comprises a second protruding part (22), and the second protruding part (22) is arranged on the peripheral surface of the bottom of the column part (20);

Wherein, battery top cap structure still includes:

The lower plastic (6) comprises a third through hole (60), wherein the third through hole (60) is sleeved on the column part (20), the cross section of the inner edge of the third through hole (60) is oblique or arc, and the caliber of the third through hole (60) gradually increases or gradually decreases along the direction of the first protruding part (21) towards the second protruding part (22); and

The sealing ring (5) is sleeved on the pole (2), and the sealing ring (5) is positioned between the third through hole (60) and the pole (2).

3. The battery top cover structure according to claim 1, characterized in that the top cover sheet comprises a positioning recess (10) arranged around the first through hole (11), the positioning recess (10) is recessed in the top surface of the top cover sheet (1), and the positioning recess (10) is configured to limit the upper plastic (4).

4. The battery top cover structure according to claim 2, characterized in that the lower plastic (6) comprises a third protrusion (61) arranged around the third through hole (60), the third protrusion (61) protruding from the top surface of the lower plastic (6), the third protrusion (61) being configured to form a recessed area (62) on the bottom surface of the lower plastic (6), the edge profile of the recessed area (62) matching the edge profile of the second protrusion (22).

5. The battery top cover structure according to claim 4, wherein the thickness of the seal ring is greater than or equal to the thickness of the third boss (61).

6. The battery top cover structure according to claim 4, wherein the top cover sheet (1) includes a recess (12) provided around the first through hole (11), the recess (12) is recessed in a bottom surface of the top cover sheet (1), and an edge profile of the recess (12) matches an edge profile of the third protruding portion (61).

7. The battery top cover structure according to claim 1, wherein the ratio of the aperture of the first through hole (11) to the sum of the dimensions, which is the sum of the diameter of the cylindrical portion (20) and the wall thickness of the second ring body (42), is greater than 1.

8. The battery top cover structure according to claim 7, wherein a ratio of an outer diameter of the gasket (3) and an aperture of the first through hole (11) is greater than or equal to 1 and less than or equal to 2.

9. The battery top cover structure according to claim 7, wherein the wall thickness of the second ring body (42) is greater than or equal to 0.1mm and less than or equal to 3mm.

10. The battery top cover structure according to claim 1, wherein the pole (2) further comprises a fourth protruding portion (23), the fourth protruding portion (23) being provided on the top surface of the column portion (20).

11. The battery top cover structure according to claim 10, characterized in that an annular groove (24) is provided between the fourth boss (23) and the first boss (21).

12. The battery top cover structure according to claim 11, wherein the cross-sectional shape of the wall surface of the annular groove (24) facing the outside is a diagonal line or an arc line.

13. The battery top cover structure according to claim 1, further comprising:

The first auxiliary gasket (30) is annular in shape, the first auxiliary gasket (30) is arranged at the bottom of the gasket (3), and the first auxiliary gasket (30) is embedded between the column part (20) and the second ring body (42).

14. The battery top cover structure of claim 1, wherein the upper plastic further comprises:

And a third ring body (43) arranged on the top surface of the second ring body (42), wherein the third ring body (43) surrounds the outer side of the first protruding part.

15. The battery top cover structure of claim 14, further comprising:

The second auxiliary gasket (31) is annular in shape, the second auxiliary gasket (31) is arranged at the top of the gasket (3), and the second auxiliary gasket (31) is embedded between the first protruding part (21) and the third ring body (43).

16. A battery comprising the battery top cover structure of any one of claims 1 to 15.