CN220138509U

CN220138509U - Battery pack sealing structure and battery pack

Info

Publication number: CN220138509U
Application number: CN202321482879.9U
Authority: CN
Inventors: 周元; 周红权; 徐宇虹; 陈河盛
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-12-05
Anticipated expiration: 2033-06-12

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack sealing structure and a battery pack. The battery pack sealing structure comprises a boundary beam and an upper cover, wherein the boundary beam comprises a first sealing surface and a second sealing surface; the upper cover comprises a body, the edge of the body is provided with a downward bent flanging, the flanging comprises a horizontal section and an inclined section, the sealing cover of the horizontal section is arranged on the first sealing surface, and the sealing cover of the inclined section is arranged on the second sealing surface. The battery pack sealing structure has good sealing performance, and improves the safety performance of the battery pack. The battery pack comprises a battery box, and the battery box comprises the battery pack sealing structure. The battery pack adopts the battery pack sealing structure, so that the sealing performance is better, the service life of the battery pack is prolonged, and the use safety of the battery pack is improved.

Description

Battery pack sealing structure and battery pack

Technical Field

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

Background

With the steady increase of the market share and the conservation amount of the new energy automobiles, the number of faults of the new energy automobiles also presents a larger base number, wherein the battery pack faults are the main reasons of the faults of the new energy automobiles.

In the existing battery pack, only one sealing structure is generally arranged between the upper cover and the side beam of the shell, and along with the extension of the service time, the sealing performance of the sealing structure gradually fails, so that external water vapor and dust can enter the battery pack to cause short circuit of the battery pack and even cause safety accidents.

Therefore, there is a need to provide a battery pack sealing structure and a battery pack to solve the above problems.

Disclosure of Invention

According to one aspect of the utility model, the utility model provides a battery pack sealing structure, which has better sealing performance and improves the safety performance of the battery pack.

To achieve the purpose, the utility model adopts the following technical scheme:

battery package seal structure includes:

the side beam comprises a first sealing surface and a second sealing surface;

the upper cover comprises a body, the edge of the body is provided with a turned edge which is bent downwards, the turned edge comprises a horizontal section and an inclined section, the sealing cover of the horizontal section is arranged on the first sealing surface, and the sealing cover of the inclined section is arranged on the second sealing surface.

Optionally, the boundary beam includes main part and inclined rib, the top plane of main part is first sealed face, inclined rib slope ring locates the edge of first sealed face, inclined rib orientation the surface of inclined section is the second sealed face.

Optionally, the diagonal rib is located on a side of the main body portion adjacent to the interior of the battery pack.

Optionally, the edge of the body is bent downwards once to form the inclined section, and then bent upwards once to form the horizontal section.

Optionally, the angle between the inclined section and the horizontal section is 105 ° -120 °.

Optionally, the battery pack sealing structure further comprises a first seal member disposed between the horizontal segment and the first sealing surface in a compressed state.

Optionally, the first seal is bonded to the first sealing surface.

Optionally, a rivet nut is arranged on the first sealing surface, and a bolt penetrates through the horizontal section to be in threaded connection with the rivet nut.

Optionally, the battery pack sealing structure further comprises a second seal disposed in a compressed state between the inclined section and the second sealing surface.

Optionally, the second sealing surface is parallel to the inclined section; or alternatively, the first and second heat exchangers may be,

the second sealing surface is arranged at an included angle with the inclined section, the distance between the second sealing surface and the inclined section is gradually increased from the first end of the second sealing surface to the second end of the second sealing surface, the first end is connected with the first sealing surface, and the second end is far away from the first sealing surface.

Optionally, an included angle between the horizontal section and the inclined section is smaller than or equal to an included angle between the first sealing surface and the second sealing surface.

Optionally, the second seal is bonded to the second sealing surface.

Optionally, the inclined section is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged at intervals along the length direction of the inclined section.

According to another aspect of the present utility model, the present utility model further provides a battery pack, including a battery box, where the battery box includes the battery pack sealing structure according to any one of the above technical solutions.

The utility model has the beneficial effects that:

the utility model provides a battery pack sealing structure which comprises side beams and an upper cover. The flanging horizontal section sealing cover is arranged on the first sealing surface of the side beam to form a first layer of sealing of the battery pack, and the flanging inclined section sealing cover is arranged on the second sealing surface of the side beam to form a second layer of sealing of the battery pack. That is, the battery pack sealing structure has two layers of sealing, compared with the battery pack with only one sealing structure in the prior art, the sealing performance of the battery pack is improved, the risk of sealing failure of the battery pack is reduced, the risk of short circuit of the battery pack due to sealing failure is further reduced, the service life of the battery pack is prolonged, and the safety performance of the battery pack is improved. And under the condition that the internal space of the battery pack is insufficient, the width of the first sealing surface can be properly reduced while the sealing performance of the battery pack is ensured, and more space is provided for arrangement of parts in the battery pack.

The utility model also provides a battery pack, which comprises a battery box, wherein the battery box comprises the battery pack sealing structure. The battery pack adopts the battery pack sealing structure, so that the battery pack has better sealing performance and lower short circuit risk.

Drawings

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

Fig. 1 is a partial schematic view of a battery pack sealing structure according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of an edge beam according to an embodiment of the present utility model;

fig. 3 is a partial schematic view of an upper cover according to an embodiment of the present utility model.

In the figure:

100. edge beams; 110. a main body portion; 111. a first sealing surface; 120. diagonal ribs; 121. a second sealing surface; 130. pulling and riveting a nut; 140. a bolt; 150. a mounting surface; 160. a shaft sleeve; 200. an upper cover; 210. a horizontal section; 220. an inclined section; 230. reinforcing ribs; 300. a first seal; 400. and a second seal.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a battery pack sealing structure, and sealing performance is better, has improved the security performance of battery pack.

Specifically, as shown in fig. 1 and 2, the battery pack sealing structure includes a side rail 100 and an upper cover 200, wherein the side rail 100 includes a first sealing surface 111 and a second sealing surface 121, and the first sealing surface 111 and the second sealing surface 121 are used for sealing between the side rail 100 and the upper cover 200. The upper cover 200 comprises a body, the edge of the body is provided with a downward bent flanging, the flanging comprises a horizontal section 210 and an inclined section 220, the horizontal section 210 is sealed and arranged on the first sealing surface 111 to form a first layer of sealing of the battery pack, and the inclined section 220 is sealed and arranged on the second sealing surface 121 to form a second layer of sealing of the battery pack. That is, the battery pack sealing structure has two layers of sealing, even if the sealing between the horizontal section 210 and the first sealing surface 111 fails along with the extension of the service time, the battery pack can maintain good sealing performance due to the sealing between the inclined section 220 and the second sealing surface 121. And, in the case that the internal space of the battery pack is insufficient, the width of the first sealing surface 111 can be appropriately reduced while ensuring the sealing performance of the battery pack, providing more space for the arrangement of the internal components of the battery pack.

Optionally, with continued reference to fig. 2, in this embodiment, the side beam 100 includes a main body 110 and an inclined rib 120, where a top plane of the main body 110 is a first sealing surface 111, the inclined rib 120 is obliquely looped around an edge of the first sealing surface 111, and a surface of the inclined rib 120 facing the inclined section 220 is a second sealing surface 121. In other embodiments, the first sealing surface 111 and the second sealing surface 121 may be arranged in other manners, and may be arranged according to actual needs.

Further, with continued reference to fig. 1, in the present embodiment, the diagonal rib 120 is located on the side of the main body 110 near the inside of the battery pack, and this arrangement can avoid increasing the size of the battery pack.

Further, with continued reference to fig. 1, in this embodiment, the edge of the body needs to be bent twice to form the inclined section 220 and the horizontal section 210, specifically, the edge of the body is bent downward once to form the inclined section 220, and then bent upward once to form the horizontal section 210. The angle between the inclined section 220 and the horizontal section 210 may be 105 ° -120 °, and may be 105 °, 110 °, 115 °, 120 ° or the like, for example, according to actual needs.

Further, the above-mentioned battery pack sealing structure further includes a first sealing member 300, wherein the first sealing member 300 is configured to seal between the horizontal segment 210 and the first sealing surface 111, and specifically, the first sealing member 300 is disposed between the horizontal segment 210 and the first sealing surface 111 in a compressed state. By compressing the first seal 300, the first seal 300 can be made to more adhere to the horizontal segment 210 and the first sealing surface 111, thereby improving the sealing performance between the horizontal segment 210 and the first sealing surface 111.

Alternatively, the first seal 300 may be a sealing ring. The first sealing member 300 may be made of foamed silica gel type material having a high compression ratio, typically up to 30% -60%, and having excellent sealing performance in a compressed state, and having a V-0 class flame retardant rating, which is not easy to burn.

Further, the first sealing member 300 is adhered to the first sealing surface 111, glue can be coated on the first sealing member 300, and then the first sealing member 300 is adhered to the first sealing surface 111, so that the first sealing member 300 is prevented from being shifted in the process of installing the upper cover 200, the difficulty in installing the battery pack sealing structure can be reduced, and the accuracy of the installation position of the first sealing member 300 is guaranteed.

Optionally, with continued reference to fig. 1, a blind rivet nut 130 is provided on the first sealing surface 111, and a bolt 140 is threaded through the horizontal segment 210 with the blind rivet nut 130 to effect the securing of the upper cover 200 to the side rail 100. During the connection of the bolt 140 to the blind rivet nut 130, the first seal 300 is compressed by tightening the bolt 140, achieving a good seal between the horizontal segment 210 and the first seal 300. The blind rivet nut 130 is generally made of steel type material, and itself contains sealant, so that the blind rivet nut has excellent sealing performance. The bolts 140 can be flange bolts of M5 or hexagon bolts with gaskets, and the bolts can be selected according to actual needs.

Optionally, a plurality of blind rivet nuts 130 are provided, the plurality of blind rivet nuts 130 are arranged at intervals along the length direction of the first sealing surface 111, the distance between two adjacent blind rivet nuts 130 can be 80mm-90mm, etc., the diameter of the blind rivet nuts 130 can be 7mm, and the blind rivet nuts can be set according to actual needs.

Further, the width of the horizontal section 210 is generally greater than the width of the first sealing surface 111 to ensure installation of the upper cover 200.

Further, with continued reference to fig. 1, the above-described battery pack sealing structure further includes a second seal 400, where the second seal 400 is configured to seal between the inclined section 220 and the second sealing surface 121, and specifically, the second seal 400 is disposed between the inclined section 220 and the second sealing surface 121 in a compressed state. By compressing the second seal 400, the second seal 400 may be made to more conform to the inclined section 220 and the second sealing surface 121, thereby improving the sealing performance between the inclined section 220 and the second sealing surface 121.

Alternatively, the second seal 400 may be a sealing ring. The second sealing member 400 can be made of foamed silica gel materials, and the materials have high compression ratio, the compression ratio can reach 30% -60% in general, and the V-0 flame retardant grade is not easy to burn while the sealing member has excellent sealing performance in a compressed state.

Further, the second sealing member 400 is adhered to the second sealing surface 121, glue can be coated on the second sealing member 400, and then the second sealing member 400 is adhered to the second sealing surface 121, so that the arrangement mode can avoid the second sealing member 400 from being shifted in the process of installing the upper cover 200, not only can reduce the installation difficulty of the battery pack sealing structure, but also is beneficial to ensuring the accuracy of the installation position of the second sealing member 400.

Specifically, in the present embodiment, when the horizontal section 210 is covered on the first sealing surface 111 by the bolts 140, the inclined section 220 moves in a direction approaching the second sealing surface 121 as the upper cover 200 moves down, compressing the second seal 400.

Alternatively, the width of the second seal 400 may be smaller than the width of the second sealing surface 121 to ensure that the second seal 400 is fully compressed.

Preferably, in one embodiment, the second sealing surface 121 is disposed parallel to the inclined section 220, so that the pressure applied to the second sealing member 400 can be balanced, and the sealing performance is better. In another embodiment, the second sealing surface 121 may also be disposed at an angle with respect to the inclined section 220, and the distance between the second sealing surface 121 and the inclined section 220 increases gradually from a first end of the second sealing surface 121 to a second end of the second sealing surface 121, wherein the first end is connected to the first sealing surface 111 and the second end is far away from the first sealing surface 111. By the arrangement mode, the sealing performance of the position far away from the inside of the battery pack can be improved, and the risk that external water and dust enter the inside of the battery pack can be reduced. In other embodiments, the included angle between the horizontal section 210 and the inclined section 220 may be smaller than or equal to the included angle between the first sealing surface 111 and the second sealing surface 121, so as to improve the sealing performance between the upper cover 200 and the boundary beam 100, which is set according to actual needs.

Further, with continued reference to fig. 1 and 3, the inclined section 220 is provided with a plurality of reinforcing ribs 230, and the plurality of reinforcing ribs 230 are spaced apart along the length direction of the inclined section 220, and the reinforcing ribs 230 may be made of the same material as the upper cover 200. While the inclined section 220 and the second sealing surface 121 form pressure on the second sealing member 400, the inclined section 220 receives a repulsive force, and by providing the reinforcing ribs 230, the strength of the inclined section 220 can be improved, so that the strength and shape of the upper cover 200 after receiving the repulsive force are effectively ensured to be unchanged, and the sealing effect is ensured.

Further, with continued reference to fig. 1 and 2, the side rail 100 further includes a mounting surface 150, and a bushing 160 is provided on the mounting surface 150, and a top surface of the bushing 160 abuts against the chassis of the vehicle body to firmly mount the battery pack on the chassis of the vehicle body. The sleeve 160 may be made of the same material as the side sill 100, such as an aluminum alloy.

The installation flow of the battery pack sealing structure is as follows:

mounting the blind rivet nut 130 in a mounting hole previously provided on the first sealing surface 111;

bonding the first seal 300 to the first sealing surface 111 and the second seal 400 to the second sealing surface 121;

installing the upper cover 200, wherein the installation holes on the horizontal section 210 of the upper cover 200 are in one-to-one correspondence with the installation holes on the first sealing surface 111;

the bolts 140 are installed and tightened, and the first and second seals 300 and 400 are compressed to form a good seal during tightening of the bolts 140.

The battery pack sealing structure provided in this embodiment increases the sealing between the inclined section 220 and the second sealing surface 121 under the condition that the space of the battery pack allows, and can provide more sealing guarantee when the sealing performance between the horizontal section 210 and the first sealing surface 111 is damaged, so that the sealing performance of the battery pack is better. In addition, under the condition of insufficient space of the battery pack, the width of the first sealing surface 111 can be reduced, more width dimensions are provided for arrangement of parts in the battery pack, and the overall design reliability of the battery pack is ensured.

The embodiment also provides a battery pack, which comprises a battery box, wherein the battery box comprises the battery pack sealing structure. The battery pack adopts the battery pack sealing structure, so that the battery pack has better sealing performance and lower short circuit risk.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Battery package seal structure, its characterized in that includes:

-a side rail (100), the side rail (100) comprising a first sealing surface (111) and a second sealing surface (121);

the upper cover (200), upper cover (200) include the body, the edge of body has the turn-ups of bending downwards, the turn-ups includes horizontal segment (210) and inclined segment (220), horizontal segment (210) sealed lid is located first sealed face (111), inclined segment (220) sealed lid is located second sealed face (121).

2. The battery pack sealing structure according to claim 1, wherein the side rail (100) includes a main body portion (110) and an inclined rib (120), a top plane of the main body portion (110) is the first sealing surface (111), the inclined rib (120) is obliquely looped around an edge of the first sealing surface (111), and a surface of the inclined rib (120) facing the inclined section (220) is the second sealing surface (121).

3. The battery pack sealing structure according to claim 2, wherein the inclined rib (120) is located at a side of the main body portion (110) adjacent to the inside of the battery pack.

4. The battery pack sealing structure according to claim 1, wherein the edge of the body is bent downward once to form the inclined section (220), and is bent upward once to form the horizontal section (210).

5. The battery pack sealing structure according to claim 1, wherein an angle between the inclined section (220) and the horizontal section (210) is 105 ° -120 °.

6. The battery pack sealing structure according to claim 1, further comprising a first seal (300), the first seal (300) being disposed in a compressed state between the horizontal segment (210) and the first sealing surface (111).

7. The battery pack sealing structure according to claim 1, wherein a blind rivet nut (130) is provided on the first sealing surface (111), and a bolt (140) is screwed with the blind rivet nut (130) through the horizontal section (210).

8. The battery pack sealing structure according to claim 1, further comprising a second seal (400), the second seal (400) being disposed in a compressed state between the inclined section (220) and the second sealing surface (121).

9. The battery pack sealing structure according to claim 8, wherein the second sealing surface (121) is parallel to the inclined section (220); or alternatively, the first and second heat exchangers may be,

the second sealing surface (121) and the inclined section (220) are arranged at an included angle, the distance between the second sealing surface (121) and the inclined section (220) is gradually increased from the first end of the second sealing surface (121) to the second end of the second sealing surface (121), the first end is connected with the first sealing surface (111), and the second end is far away from the first sealing surface (111).

10. The battery pack sealing structure according to claim 8, wherein an angle between the horizontal section (210) and the inclined section (220) is smaller than or equal to an angle between the first sealing surface (111) and the second sealing surface (121).

11. A battery pack comprising a battery case comprising the battery pack sealing structure according to any one of claims 1 to 10.