Power battery cover plate and power battery

Abstract

The utility model provides a power battery cover plate and a power battery, and the power battery cover plate comprises a top cover plate with a mounting hole; the pole is arranged in the mounting hole in a penetrating manner; the upper plastic part is crimped between the top cover plate and the upper part of the pole; the sealing ring is provided with a first annular part and a second annular part, the first annular part is arranged around the axial center line of the mounting hole, the first annular part is clamped between the bottom wall of the mounting hole and the bottom of the pole, the second annular part is arranged on the peripheral wall of the first annular part, the second annular part is arranged around the first annular part, and the second annular part is clamped between the bottom wall of the mounting hole and the bottom of the pole. A first groove is formed between the top of the second annular part and the peripheral wall of the upper part of the first annular part, a second groove is formed between the bottom of the second annular part and the peripheral wall of the lower part of the first annular part, and the second annular part is clamped between the side wall of the mounting hole and the bottom of the pole. The sealing structure can reliably seal the gap between the pole and the top cover plate, avoids the problems that the sealing ring is not compressed in place, deviates, leaks air and the like, and improves the sealing reliability.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular, to a power battery cover plate and a power battery. Background Art

[0002] A power battery is a storage battery that provides power for electric vehicles, electric trains, electric bicycles, etc. As an important component of a power battery, the quality of the power battery cover plate directly affects the working performance of the power battery.

[0003] The Chinese utility model patent with the authorization publication number of CN 220984671 U discloses an integrally formed pole column assembly of a power battery cover plate, including a pole column and a circumferential plastic provided on the circumferential side of the pole column. An L-shaped sealing ring is provided on the bottom side of the pole column, and a fixing ring is embedded at the bottom of the circumferential plastic. The fixing ring is arranged in a covering manner on the side of the L-shaped sealing ring away from the pole column. Although it can control the compression amount of the L-shaped sealing ring during the working process, thereby improving the sealing reliability of the L-shaped sealing ring for the power battery, however, due to the relatively thick thickness of the vertical part in the L-shaped sealing ring, it is difficult for the vertical part in the L-shaped sealing ring to be compressed in place during the compression process, and there is still a problem of poor sealing reliability. Summary of the Utility Model

[0004] Embodiments of the present application provide a power battery cover plate and a power battery to solve the problems existing in the related art. The technical solutions are as follows:

[0005] In a first aspect, embodiments of the present application provide a power battery cover plate, including:

[0006] A top cover plate, the top cover plate has a mounting hole, and the mounting hole penetrates through the top cover plate both vertically and horizontally;

[0007] A pole column, the pole column passes through the mounting hole;

[0008] An upper plastic part, the upper plastic part is press-connected between the top cover plate and the upper part of the pole column;

[0009] A sealing ring, the sealing ring is provided with a first annular part and a second annular part. The first annular part is arranged around the axial center line of the mounting hole, the first annular part is clamped between the bottom wall of the mounting hole and the bottom of the pole column, the second annular part is arranged on the outer peripheral wall of the first annular part, the second annular part surrounds the first annular part, a first groove is formed between the top of the second annular part and the upper outer peripheral wall of the first annular part, a second groove is formed between the bottom of the second annular part and the lower outer peripheral wall of the first annular part, and the second annular part is clamped between the side wall of the mounting hole and the bottom of the pole column.

[0010] In one embodiment, the power battery cover plate further includes:

[0011] a middle plastic part, which is clamped between the side wall of the mounting hole and the lower outer peripheral wall of the pole column.

[0012] In one embodiment, the lower outer diameter of the pole column is greater than the upper outer diameter of the pole column, and the middle plastic part covers the lower part of the pole column.

[0013] In one embodiment, the top of the second annular part also abuts against the bottom of the middle plastic part.

[0014] In one embodiment, the upper plastic part is provided with an extension part, and the extension part is clamped between the side wall of the mounting hole and the middle outer peripheral wall of the pole column.

[0015] In one embodiment, the top of the middle plastic part has a plurality of third grooves, and the plurality of third grooves are arranged around the axial center line of the mounting hole, and the extension part covers the top of the middle plastic part.

[0016] In one embodiment, the top of the top cover plate is provided with a bending part, the bending part is arranged around the top opening of the mounting hole, the bending part is bent towards the axial center line of the mounting hole, and the upper plastic part covers the bending part.

[0017] In one embodiment, the number of the bending parts is multiple, and the multiple bending parts are arranged at intervals around the axial center line of the mounting hole.

[0018] In one embodiment, the power battery cover plate further includes:

[0019] a lower plastic part, the lower plastic part covers the bottom of the top cover plate, the lower plastic part is provided with a connecting part, the connecting part is inserted into the bottom opening of the mounting hole, and the connecting part is arranged around the axial center line of the mounting hole.

[0020] In a second aspect, an embodiment of the present application provides a power battery, including the above-mentioned power battery cover plate.

[0021] The advantages or beneficial effects in the above technical solutions at least include:

[0022] For the power battery cover of the present utility model, the upper plastic part is crimped between the top cover plate and the upper part of the pole column. At the same time, the first annular part is clamped between the bottom wall of the mounting hole and the bottom of the pole column to limit the axial movement of the pole column, thereby realizing the insulating fixation of the pole column without forming a pole column ring and without welding the pole column. The assembly process is less, and the assembly efficiency can be effectively improved. At the same time, a first groove is formed between the top of the second annular part and the outer peripheral wall of the upper part of the first annular part, and a second groove is formed between the bottom of the second annular part and the outer peripheral wall of the lower part of the first annular part, which can play a role in thinning the second annular part, realizing the reduction of the compression difficulty of the second annular part, enabling the second annular part to be reliably clamped between the side wall of the mounting hole and the bottom of the pole column, ensuring that the second annular part is in close contact with the side wall of the mounting hole and the second annular part is in close contact with the bottom of the pole column, thereby reliably sealing the gap between the pole column and the top cover plate, avoiding problems such as incomplete compression of the sealing ring, deviation of the sealing ring, and air leakage, and improving the sealing reliability. In addition, a second groove is formed between the bottom of the second annular part and the outer peripheral wall of the lower part of the first annular part, which can play a role in avoiding the sealing ring and the top cover plate, and avoiding the assembly interference problem between the sealing ring and the top cover plate.

[0023] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the drawings, unless otherwise specified, the same reference numerals throughout the several views represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0025] Figure 1 is a cross-sectional view of the power battery cover of the present utility model;

[0026] Figure 2 is Figure 1 a partial enlarged view of part A in

[0027] Figure 3 is an exploded view of the power battery cover of the present utility model;

[0028] Figure 4 is a three-dimensional structural schematic diagram of the sealing ring in the present utility model.

[0029] REFERENCE NUMERALS

[0030] 1. Top cover plate; 11. Mounting hole; 12. Bending part; 2. Terminal post; 3. Upper plastic part; 31. Extension part; 4. Sealing ring; 41. First annular part; 42. Second annular part; 43. First groove; 44. Second groove; 5. Middle plastic part; 51. Third groove; 6. Lower plastic part; 61. Connection part. Detailed implementation mode

[0031] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are considered to be exemplary in nature rather than restrictive.

[0032] Refer to Figures 1-4 , which shows a power battery cover plate in a preferred embodiment of the present utility model, including:

[0033] Top cover plate 1, the top cover plate 1 has a mounting hole 11, and the mounting hole 11 penetrates through the top cover plate 1 both vertically and horizontally;

[0034] Terminal post 2, the terminal post 2 is inserted through the mounting hole 11;

[0035] Upper plastic part 3, the upper plastic part 3 is crimped between the top cover plate 1 and the upper part of the terminal post 2;

[0036] Sealing ring 4, the sealing ring 4 is provided with a first annular part 41 and a second annular part 42. The first annular part 41 is arranged around the axial center line of the mounting hole 11, the first annular part 41 is clamped between the bottom wall of the mounting hole 11 and the bottom of the terminal post 2, the second annular part 42 is arranged on the outer peripheral wall of the first annular part 41, the second annular part 42 is arranged around the first annular part 41, a first groove 43 is formed between the top of the second annular part 42 and the upper outer peripheral wall of the first annular part 41, a second groove 44 is formed between the bottom of the second annular part 42 and the lower outer peripheral wall of the first annular part 41, and the second annular part 42 is clamped between the side wall of the mounting hole 11 and the bottom of the terminal post 2.

[0037] For the power battery cover of the present utility model, the upper plastic part 3 is crimped between the top cover plate 1 and the upper part of the pole column 2. At the same time, the first annular part 41 is clamped between the bottom wall of the mounting hole 11 and the bottom of the pole column 2 to limit the axial movement of the pole column 2, thereby realizing the insulation fixation of the pole column 2. There is no need to form a pole column ring nor weld the pole column 2, with fewer assembly processes, which can effectively improve the assembly efficiency. At the same time, a first groove 43 is formed between the top of the second annular part 42 and the upper outer peripheral wall of the first annular part 41, and a second groove 44 is formed between the bottom of the second annular part 42 and the lower outer peripheral wall of the first annular part 41, which can play a role in thinning the second annular part 42, realizing the reduction of the compression difficulty of the second annular part 42, enabling the second annular part 42 to be reliably clamped between the side wall of the mounting hole 11 and the bottom of the pole column 2, ensuring that the second annular part 42 is in close contact with the side wall of the mounting hole 11 and the bottom of the pole column 2, thereby reliably sealing the gap between the pole column 2 and the top cover plate 1, avoiding problems such as the sealing ring 4 not being compressed in place, the sealing ring 4 running off, air leakage, etc., and improving the sealing reliability. In addition, a second groove 44 is formed between the bottom of the second annular part 42 and the lower outer peripheral wall of the first annular part 41, which can play a role in avoiding the sealing ring 4 and the top cover plate 1, avoiding the problem of assembly interference between the sealing ring 4 and the top cover plate.

[0038] See Figure 2 and Figure 3 , in an embodiment, the power battery cover further includes:

[0039] The middle plastic part 5 is clamped between the side wall of the mounting hole 11 and the lower outer peripheral wall of the pole column 2 to limit the radial movement of the pole column 2, which can further improve the assembly stability of the pole column 2 and, at the same time, improve the insulation reliability of the pole column 2.

[0040] See Figure 2 , in an embodiment, the lower outer diameter of the pole column 2 is greater than the upper outer diameter of the pole column 2, and the middle plastic part 5 covers the lower part of the pole column 2 to increase the contact area between the middle plastic part 5 and the pole column 2, thereby improving the connection reliability between the middle plastic part 5 and the pole column 2 and further improving the assembly stability of the pole column 2.

[0041] See Figure 2 , in an embodiment, the top of the second annular part 42 also abuts against the bottom of the middle plastic part 5. Since the middle plastic part 5 covers the lower part of the pole column 2, it is equivalent to increasing the lower outer diameter of the pole column 2. Therefore, by abutting the top of the second annular part 42 against the bottom of the middle plastic part 5, it is equivalent to increasing the contact area between the second annular part 42 and the bottom of the pole column 2, making the second annular part 42 and the bottom of the pole column 2 fit tightly, which is beneficial to improving the further sealing performance.

[0042] See Figure 2, in one embodiment, the upper plastic part 3 is provided with an extension part 31, and the extension part 31 is clamped between the side wall of the mounting hole 11 and the middle outer peripheral wall of the pole column 2, so as to increase the contact area between the upper plastic part 3 and the pole column 2, which is beneficial to further improve the assembly stability of the pole column 2. At the same time, it can also improve the insulation effect of the pole column 2.

[0043] See Figure 3 , in one embodiment, the top of the middle plastic part 5 has a plurality of third grooves 51, and the plurality of third grooves 51 are arranged around the axial center line of the mounting hole 11, and the extension part 31 covers the top of the middle plastic part 5. Since the middle plastic part 5 is coated on the lower part of the pole column 2, and the extension part 31 on the upper plastic part 3 covers the top of the middle plastic part 5, it is equivalent to increasing the contact area between the upper plastic part 3 and the pole column 2. At the same time, because the top of the middle plastic part 5 has a plurality of third grooves 51 and the extension part 31 on the upper plastic part 3 covers the top of the middle plastic part 5, a part of the extension part 31 extends into the plurality of third grooves 51, which can play an anti-rotation role for the pole column 2 and is beneficial to further improve the assembly stability of the pole column 2.

[0044] See Figures 2-3 , in one embodiment, the top of the top cover plate 1 is provided with a bending part 12, the bending part 12 is arranged around the top opening of the mounting hole 11, and the bending part 12 is bent towards the axial center line of the mounting hole 11, and the upper plastic part 3 covers the bending part 12, so as to increase the contact area between the upper plastic part 3 and the pole column 2, which is beneficial to further improve the assembly stability of the pole column 2.

[0045] See Figures 2-3 , in one embodiment, the number of the bending parts 12 is multiple, and the multiple bending parts 12 are arranged at intervals around the axial center line of the mounting hole 11, so that a part of the upper plastic part 3 is filled between the adjacent bending parts 12, which can reliably fix the upper plastic part 3 on the top cover plate 1, and at the same time, it is beneficial to further improve the assembly stability of the pole column 2.

[0046] See Figures 1-3 , in one embodiment, the power battery cover plate further includes:

[0047] A lower plastic part 6, the lower plastic part 6 is coated on the bottom of the top cover plate 1, the lower plastic part 6 is provided with a connecting part 61, and the connecting part 61 is inserted into the bottom opening of the mounting hole 11, and the connecting part 61 is arranged around the axial center line of the mounting hole 11. Since the connecting part 61 is inserted into the bottom opening of the mounting hole 11, the contact area between the lower plastic part 6 and the top cover plate 1 can be increased, so that the lower plastic part 6 and the top cover plate 1 are reliably assembled together. At the same time, the lower plastic part 6 plays an insulating role.

[0048] A power battery provided by a preferred embodiment of the present invention includes the above-mentioned power battery cover plate.

[0049] For the power battery of the present utility model, since the above-mentioned power battery cover plate is adopted, and also because a first groove 43 is formed between the top of the second annular portion 42 and the upper outer peripheral wall of the first annular portion 41, and a second groove 44 is formed between the bottom of the second annular portion 42 and the lower outer peripheral wall of the first annular portion 41, it can play a role in thinning the second annular portion 42, realizing the reduction of the compression difficulty of the second annular portion 42, enabling the second annular portion 42 to be reliably clamped between the side wall of the mounting hole 11 and the bottom of the pole column 2, ensuring that the second annular portion 42 is in close contact with the side wall of the mounting hole 11 and the bottom of the pole column 2, thereby reliably sealing the gap between the pole column 2 and the top cover plate 1, avoiding problems such as incomplete compression of the sealing ring 4, deviation of the sealing ring 4, and air leakage, and improving the sealing reliability.

[0050] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0052] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. Power battery cover plate, characterized in that Comprising: A top cover plate, the top cover plate having a mounting hole that penetrates the top cover plate both vertically and horizontally; A terminal post, the terminal post being inserted through the mounting hole; An upper plastic part, the upper plastic part being press-fitted between the top cover plate and the upper part of the terminal post; A sealing ring, the sealing ring having a first annular part and a second annular part, the first annular part being arranged around the axial center line of the mounting hole, the first annular part being clamped between the bottom wall of the mounting hole and the bottom of the terminal post, the second annular part being arranged on the outer peripheral wall of the first annular part, the second annular part surrounding the first annular part, a first groove being formed between the top of the second annular part and the upper outer peripheral wall of the first annular part, a second groove being formed between the bottom of the second annular part and the lower outer peripheral wall of the first annular part, the second annular part being clamped between the side wall of the mounting hole and the bottom of the terminal post.

2. The power battery cover plate according to claim 1, characterized in that, The power battery cover plate further comprises: A middle plastic part, the middle plastic part being clamped between the side wall of the mounting hole and the lower outer peripheral wall of the terminal post.

3. The power battery cover plate according to claim 2, wherein, The outer diameter of the lower part of the terminal post is larger than the outer diameter of the upper part of the terminal post, and the middle plastic part covers the lower part of the terminal post.

4. The power battery cover plate according to claim 2, wherein The top of the second annular part also abuts against the bottom of the middle plastic part.

5. The power battery cover plate according to claim 2, characterized in that The upper plastic part is provided with an extension part, and the extension part is clamped between the side wall of the mounting hole and the middle outer peripheral wall of the terminal post.

6. The power battery cover plate according to claim 5, wherein The top of the middle plastic part has a plurality of third grooves, the plurality of third grooves being arranged around the axial center line of the mounting hole, and the extension part covers the top of the middle plastic part.

7. The power battery cover plate according to claim 1, characterized in that, The top of the top cover plate is provided with a bent part, the bent part being arranged around the top opening of the mounting hole, the bent part being bent towards the axial center line of the mounting hole, and the upper plastic part covers the bent part.

8. The power battery cover plate according to claim 7, characterized in that, The number of the bent parts is multiple, and the multiple bent parts are arranged at intervals around the axial center line of the mounting hole.

9. The power battery cover plate according to claim 1, characterized in that The power battery cover plate further comprises: A lower plastic part, the lower plastic part covering the bottom of the top cover plate, the lower plastic part being provided with a connecting part, the connecting part being inserted into the bottom opening of the mounting hole, and the connecting part being arranged around the axial center line of the mounting hole.

10. Power battery, characterized in that, Including the power battery cover plate according to any one of claims 1-9.

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