CN221080188U

CN221080188U - Sealing structure and pole thereof

Info

Publication number: CN221080188U
Application number: CN202322911428.9U
Authority: CN
Inventors: 汪静; 郑旭; 舒宽金
Original assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Current assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Priority date: 2023-10-27
Filing date: 2023-10-27
Publication date: 2024-06-04
Anticipated expiration: 2033-10-27

Abstract

The utility model provides a sealing structure and a pole thereof, wherein the sealing structure comprises: the pole comprises a body part, a main body part and a limiting part connected between the body part and the main body part, wherein the body part, the main body part and the limiting part enclose a limiting groove; a seal; the mounting cover is provided with a through hole, the through hole comprises a first hole and a second hole, and the diameter of the second hole is larger than that of the first hole so as to form a limiting step surface; the pole penetrates through the through hole, and the sealing piece is located in the limiting groove and abuts against the limiting step surface. The axial movement of the sealing element is limited by the limiting groove and the limiting step surface, so that sealing fit between the sealing element and the pole and mounting cover is realized, and the sealing element has higher assembly stability, thereby improving the technical problem of poor sealing effect of the top cover and the pole in the related technology.

Description

Sealing structure and pole thereof

Technical Field

The utility model relates to the technical field of batteries, in particular to a sealing structure and a pole thereof.

Background

The positive and negative pole posts are sleeved with sealing rings to realize sealing connection with the battery top cover. The positive and negative poles generally comprise a pole bottom, a pole body and a pole head which are sequentially arranged, and the pole body is generally a smooth pole body, so that the risk of axial sealing failure of the sealing ring and the pole body exists, and the sealing effect between the top cover and the pole body of the battery is poor.

Disclosure of utility model

The embodiment of the utility model provides a sealing structure and a pole thereof, which can solve the technical problem of poor sealing effect of a battery top cover and the pole.

In a first aspect, embodiments of the present utility model provide a sealing structure, comprising:

The pole comprises a body part, a main body part and a limiting part connected between the body part and the main body part, wherein the body part, the main body part and the limiting part enclose a limiting groove;

A seal; and

The mounting cover is provided with a through hole, the through hole comprises a first hole and a second hole, and the diameter of the second hole is larger than that of the first hole so as to form a limit step surface;

The pole penetrates through the through hole, and the sealing piece is located in the limiting groove and abuts against the limiting step surface.

In one embodiment, the mounting cover includes a base plate and a mounting member positioned over the base plate, a first hole is provided in the mounting member, and a second hole is provided in the base plate.

In one embodiment, a bottom groove is formed in the bottom of the body.

In one embodiment, the bottom groove has a groove depth of 0.2-0.3 times the height of the body portion.

In one embodiment, the included angle between the groove wall of the bottom groove and the groove bottom of the bottom groove is 105-150 degrees.

In an embodiment, the body portion includes a first portion connected to the limiting portion and a second portion extending from a bottom of the first portion, a first mounting groove and a second mounting groove are formed in a bottom of the substrate and are communicated with the second hole, the first portion is mounted in the first mounting groove, the second portion is mounted in the second mounting groove, and the bottom of the second portion is provided with the bottom groove.

In an embodiment, the device further comprises a pressing block, wherein a top groove is formed in the top of the main body portion, and a part of the pressing block is arranged on the groove wall of the top groove.

In an embodiment, the device further comprises an insulating part, a third mounting groove communicated with the first hole is formed in the top of the mounting part, and the insulating part is mounted in the third mounting groove, surrounds the first pole and is located between the pressing block and the mounting part.

In an embodiment, the first pole is a composite structure, the limiting portion includes a first limiting portion and a second limiting portion which are connected with each other, the second limiting portion is located on one side, far away from the body portion, of the first limiting portion, materials of the first limiting portion and the body portion are the same, materials of the second limiting portion and the body portion are the same, and materials of the first limiting portion and the second limiting portion are different.

In one embodiment, the thickness of the seal is greater than the width of the limit groove.

In a second aspect, embodiments of the present utility model provide a pole for mounting a cap, the mounting cap being provided with a through hole, the through hole including a first hole and a second hole, the second hole having a diameter larger than that of the first hole to form a limit step surface;

The pole comprises a body part, a main body part and a limiting part connected between the body part and the main body part, wherein the body part, the main body part and the limiting part enclose a limiting groove, the limiting groove is configured for embedding a sealing element, and the sealing element is configured to be abutted against the limiting step surface.

The embodiment of the utility model has the beneficial effects that:

In the embodiment of the utility model, on one hand, the axial movement of the sealing element is limited by the limiting groove, and on the other hand, the axial movement of the sealing element is limited by the limiting step surface, so that the sealing fit between the sealing element and the pole and the mounting cover is realized, and the assembly stability is higher, thereby improving the technical problem of poor sealing effect of the top cover and the pole in the related technology.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a sealing structure and a pole according to an embodiment of the utility model.

Fig. 2 is an exploded view of a sealing structure and a pole provided by an embodiment of the present utility model.

Fig. 3 is an exploded view of the seal structure and other views of the post provided by embodiments of the present utility model.

Fig. 4 is a cross-sectional view of a pole provided by an embodiment of the present utility model.

Fig. 5 is a sectional view taken along section line V-V in fig. 1.

1. A pole; 11. a body portion; 111. a first portion; 112. a second portion; 1121. a bottom groove; 12. a limit part; 13. a main body portion; 131. a first body; 132. a second body; 133. a top groove; 135. an auxiliary groove; 14. a limit groove; 2. a seal; 3. a mounting cover; 31. a substrate; 311. a second hole; 312. a first mounting groove; 313. a second mounting groove; 32. a mounting member; 321. a first hole; 322. a third mounting groove; 33. a through hole; 34. limiting step surfaces; 4. an insulating member; 5. and (5) briquetting.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Example 1

Referring to fig. 1, 2 and 3, a sealing structure provided by an embodiment of the present application includes a pole 1, a sealing member 2, a mounting cover 3, an insulating member 4 and a pressing block 5.

Referring to fig. 4 and 5, the pole 1 includes a body portion 11, a body portion 13, and a stopper portion 12 connected between the body portion 11 and the body portion 13, the body portion 11, the body portion 13, and the stopper portion 12 enclosing a stopper groove 14;

The mounting cover 3 is provided with a through hole 33, the through hole 33 comprises a first hole 321 and a second hole 311, and the diameter of the second hole 311 is larger than that of the first hole 321 so as to form a limit step surface 34;

Wherein, the pole 1 passes through the through hole 33, and the sealing element 2 is positioned in the limit groove 14 and abuts against the limit step surface 34.

The axial movement of the sealing element 2 is limited by the limit groove 14 and the limit step surface 34, so that the sealing fit between the sealing element 2 and the pole 1 and the mounting cover 3 is realized, and the assembly stability is high, thereby improving the technical problem that the sealing effect of the top cover and the pole 1 is poor in the related art.

Example 2

Referring to fig. 4, the pole 1 includes a body portion 11, a stopper portion 12, and a body portion 13, which are sequentially provided. The body 11 includes a first portion 111 connected to the stopper 12 and a second portion 112 extending from a bottom of the first portion 111 (i.e., a surface of the first portion 111 on a side facing away from the stopper 12), the second portion 112 having a diameter smaller than that of the first portion 111.

The limiting portion 12 includes a first limiting portion 12 and a second limiting portion 12 connected to each other. The second limiting portion 12 is located at a side of the first limiting portion 12 away from the body portion 11. The first and second stopper portions 12 and 12 have the same diameter.

The main body 13 includes a first main body 131 and a second main body 132 extending from the top of the first main body 131, the second main body 132 being located at a side of the first main body 131 away from the limiting portion 12, the second main body 132 having a smaller diameter than the first main body 131, a surface of the first main body 131 facing the second main body 132 and an outer periphery of the second main body 132 forming a top groove 133.

The pole 1 is of a composite structure, the first limiting part 12 is the same as the material of the body part 11, the second limiting part 12 is the same as the material of the body part 13, and the materials of the first limiting part 12 and the second limiting part 12 are different. In this embodiment, taking the electrode 1 as the negative electrode 1 as an example, the materials of the first limiting portion 12 and the main body portion 11 are copper, the materials of the second limiting portion 12 and the main body portion 13 are aluminum, and the electrode 1 is made of a copper-aluminum composite material through a cold heading process. In other embodiments, the pole 1 material may be selected according to the pole 1 type. In the related art, for the pole 1 made of the copper-aluminum composite material, copper-aluminum friction welding is generally adopted due to different plasticity of different materials, but the friction welding process has high cost and unstable quality, and has a certain risk. The cold heading process adopted in the scheme is beneficial to reducing the processing difficulty and the processing cost. In the present embodiment, the pole 1 structure is tightly fitted with the mounting cover 3, and the groove structure is advantageous in reducing the weight of the battery module.

Referring to fig. 5, the mounting cover 3 includes a base plate 31 and a mounting member 32 provided on the base plate 31. The base plate 31 is provided with a second hole 311, the mount 32 is provided with a first hole 321, and the first hole 321 and the second hole 311 communicate to form a through hole 33. The aperture of the second hole 311 is larger than that of the first hole 321, in this embodiment, the hole radius of the second hole 311 is 1.6mm larger than that of the first hole 321, and the hole wall of the first hole 321 and the hole wall of the second hole 311 form a limiting step surface 34. The bottom of the substrate 31 is provided with a first mounting groove 312 and a second mounting groove 313 communicating with the second hole 311. The mounting member 32 is a light aluminum sheet, and the mounting member 32 is configured to be welded with an aluminum case of the battery module.

The sealing element 2 adopts a fluororubber sealing ring, and the thickness of the sealing element 2 is larger than the width of the limit groove 14.

The sealing element 2 is sleeved on the pole 1, part of the sealing element 2 is located in the limiting groove 14, the main body 13 of the pole 1 sequentially penetrates through the second hole 311 and the first hole 321 and then stretches out, the other part of the sealing element 2 is located in the second hole 311, and the sealing element 2 abuts against the limiting step surface 34. The limiting step surface 34 and the limiting groove 14 jointly play a limiting role on the sealing element 2, so that the sealing element 2 is prevented from moving axially, and the tightness between the mounting cover 3 and the pole 1 and the reliability of the sealing structure are improved. Meanwhile, the first portion 111 of the body 11 is located in the first mounting groove 312 of the substrate 31, and the second portion 112 of the body 11 is located in the second mounting groove 313 of the substrate 31. The first groove serves to limit the pole 1 from coming out upward.

The portion of the first body 131 of the body portion 13 is located in the first hole 321, and a gap is provided between the first body 131 and the wall of the first hole 321.

The top of the mounting member 32 is provided with a third mounting groove 322, and the insulator 4 is disposed in the third mounting groove 322 and surrounds the pole 1, and the insulator 4 shields the gap between the first body 131 and the wall of the first hole 321. The insulator 4 is made of plastic material, and plays a role in insulation between the pole 1 and the mounting piece 32.

The pressing block 5 is arranged on the insulating piece 4 and is positioned in the top groove 133 of the main body part 13, and the pressing block 5 is electrically connected with the pole 1 through laser welding with the first main body 131 of the main body part 13.

In this embodiment, the seal 2 has an inner diameter of 8mm, an outer diameter of 13mm and a thickness of 1.1mm; the diameter of the limiting groove 14 is the same as the inner diameter of the sealing element 2, the radius of the limiting part 12 is smaller than 1mm than that of the first main body 131, the width W of the limiting groove 14 is smaller than the thickness H of the sealing element 2, and W is more than or equal to 0.55H and less than or equal to 0.75H. By the above mentioned dimensional parameters of the seal 2, a tight fit between the seal 2 and the mounting cap 3 and the pole 1 is achieved.

Referring to fig. 4 and 5, an end of the second body 132 of the body part 13 facing away from the first body 131 is provided with an auxiliary groove 135, the auxiliary groove 135 is configured to be embedded with a press rivet, and when the pole 1, the mounting cover 3, the insulating member 4 and the pressing block 5 are assembled to a correct position, the press rivet presses the pole 1 through the auxiliary groove 135, so that the outer diameter of the pole 1 is further enlarged, and thus, an assembly gap between the pole 1 and the mounting cover 3, the insulating member 4 and the pressing block 5 is reduced, and the pole 1 is assembled more tightly.

The end of the second portion 112 of the body 11 facing away from the first portion 111 is provided with a bottom slot 1121, the bottom slot 1121 being configured for insertion during the cold heading process of the pole 1, so as to facilitate expansion of the outer diameter of the pole 1 to a desired size. The included angle between the groove wall of the bottom groove 1121 and the groove bottom of the bottom groove 1121 is 105 degrees to 150 degrees, so that the polar column 1 has better stress when expanding the diameter, and the expanding efficiency is improved. The bottom groove 1121 has a groove depth of 0.2-0.3 times the height of the body 11, so that the weight of the pole 1 is reduced without affecting the structural strength of the pole 1.

The embodiment of the application also provides a pole 1, the pole 1 is applied to the mounting cover 3, the mounting cover 3 is provided with a through hole 33, the through hole 33 comprises a first hole 321 and a second hole 311, and the diameter of the second hole 311 is larger than that of the first hole 321 so as to form a limit step surface 34. The pole 1 includes a body 11, a main body 13, and a stopper 12 connected between the body 11 and the main body 13, wherein the body 11, the main body 13, and the stopper 12 define a stopper groove 14. The limit groove 14 is configured for mounting the seal 2, the seal 2 abutting the limit step surface 34.

The embodiment of the application also provides a method for installing the sealing structure, which comprises the following steps:

s1: the sealing element 2 is arranged in the limit groove 14 of the pole 1;

S2: the mounting member 32 is arranged on the base plate 31, and the pole 1 with the sealing member 2 mounted thereon passes through the through hole 33 of the mounting cover 3;

S3: the insulator 4 is arranged in the third installation groove 322 of the installation cover 3, and the pressing block 5 is placed on the insulator 4 and goes deep into the top groove 133;

S4: the second limiting part 12 and the main body part 13 are made of materials which flow to the periphery through the jig to apply pressure, so that the pole 1, the mounting cover 3 and the sealing element 2 are tightly attached, and then the pressing block 5 and the pole 1 are connected and fixed through a laser welding process.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A sealing structure, comprising:

The pole (1) comprises a body part (11), a main body part (13) and a limiting part (12) connected between the body part (11) and the main body part (13), wherein the body part (11), the main body part (13) and the limiting part (12) enclose a limiting groove (14);

A seal (2); and

A mounting cover (3) provided with a through hole (33), wherein the through hole (33) comprises a first hole (321) and a second hole (311), and the diameter of the second hole (311) is larger than that of the first hole (321) so as to form a limit step surface (34);

The pole (1) passes through the through hole (33), and the sealing piece (2) is positioned in the limit groove (14) and abuts against the limit step surface (34).

2. The sealing structure according to claim 1, wherein the mounting cover (3) comprises a base plate (31) and a mounting member (32) located above the base plate (31), a first hole (321) is provided in the mounting member (32), and the second hole (311) is provided in the base plate (31).

3. The sealing structure according to claim 1, characterized in that the bottom of the body part (11) is provided with a bottom groove (1121).

4. A sealing arrangement according to claim 3, characterized in that the groove depth of the bottom groove (1121) is 0.2-0.3 times the height of the body part (11).

5. A sealing arrangement according to claim 3, characterized in that the angle between the wall of the bottom groove (1121) and the bottom of the bottom groove (1121) is 105 ° -150 °.

6. A sealing structure according to claim 3, wherein the body portion (11) includes a first portion (111) connected to the limiting portion (12) and a second portion (112) extending from a bottom of the first portion (111), a first mounting groove (312) and a second mounting groove (313) communicating with the second hole (311) are provided in a bottom of the base plate (31), the first portion (111) is mounted in the first mounting groove (312), the second portion (112) is mounted in the second mounting groove (313), and the bottom of the second portion (112) is provided with the bottom groove (1121).

7. The sealing structure according to claim 2, further comprising a pressing block (5), wherein a top groove (133) is provided at a top of the main body portion (13), and a portion of the pressing block (5) is provided at a groove wall of the top groove (133).

8. The sealing structure according to claim 7, further comprising an insulating member (4), wherein a third mounting groove (322) communicating with the first hole (321) is provided at the top of the mounting member (32), and the insulating member (4) is mounted in the third mounting groove (322), surrounds the first pole (1), and is located between the pressing block (5) and the mounting member (32).

9. The sealing structure according to claim 8, wherein the first pole (1) is a composite structure, the limiting portion (12) includes a first limiting portion (12) and a second limiting portion (12) that are connected to each other, the second limiting portion (12) is located at a side of the first limiting portion (12) away from the body portion (11), materials of the first limiting portion (12) and the body portion (11) are the same, materials of the second limiting portion (12) and the body portion (13) are the same, and materials of the first limiting portion (12) and the second limiting portion (12) are different.

10. The sealing arrangement according to any one of claims 1-9, characterized in that the thickness of the sealing element (2) is greater than the width of the limit groove (14).

11. A pole (1), characterized in that: the mounting cover (3) is used for mounting the cover (3), the mounting cover (3) is provided with a through hole (33), the through hole (33) comprises a first hole (321) and a second hole (311), and the diameter of the second hole (311) is larger than that of the first hole (321) so as to form a limit step surface (34);

The pole (1) comprises a body part (11), a main body part (13) and a limiting part (12) connected between the body part (11) and the main body part (13), wherein the body part (11), the main body part (13) and the limiting part (12) enclose a limiting groove (14), the limiting groove (14) is configured for embedding a sealing element (2), and the sealing element (2) is configured to abut against the limiting step surface (34).