CN117913443A

CN117913443A - Sealing structure of battery pack integrated vehicle body and vehicle

Info

Publication number: CN117913443A
Application number: CN202410220009.7A
Authority: CN
Inventors: 车跃光; 栾爱东; 杨磊
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2024-02-28
Filing date: 2024-02-28
Publication date: 2024-04-19

Abstract

The application relates to the technical field of automobile parts, in particular to a sealing structure of a battery pack integrated automobile body and an automobile. According to the application, the vehicle body frame assembly, the battery upper cover plate and the battery frame assembly are integrated together, so that the installation and arrangement requirements of various products of the whole vehicle are met, the performance of the whole vehicle can be improved, the production efficiency is improved, the weight and the cost are reduced, the sealing element can deform to increase the contact area with the vehicle body frame assembly when being subjected to pressure, and the sealing performance is improved.

Description

Sealing structure of battery pack integrated vehicle body and vehicle

Technical Field

The invention relates to the technical field of automobile parts, in particular to a sealing structure of a battery pack integrated automobile body and an automobile.

Background

Currently, most electric vehicles are assembled by CTP (integrated battery), such as fig. 1, a vehicle body 100 is assembled to a battery 200, and a battery pack is integrated with a vehicle body to have a small number of structures. The novel sealing system structure can meet the installation and arrangement requirements of various products of the whole vehicle, improve the performance of the whole vehicle, improve the production efficiency, and reduce the weight and the cost.

Most of the sealing elements in the integrated vehicle body sealing systems of the battery packs adopted by the vehicle models are mostly silica gel foam or butyl rubber, and the sealing performance of the parts is poor and the cost is high. The sealing element with good manufacturability and low cost is required to meet the sealing requirement of the integrated vehicle body structure of the battery pack.

Disclosure of Invention

The invention aims to provide a sealing structure of a battery pack integrated vehicle body and a vehicle, so as to solve the problems of poor technological performance and high cost of sealing elements in the prior art;

in order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

A seal structure of integrated automobile body of battery package, its characterized in that: the battery top cover plate is characterized by comprising a vehicle body frame assembly, a battery top cover plate and a battery frame assembly which are sequentially connected from top to bottom, wherein a sealing piece is arranged between the vehicle body frame assembly and the battery top cover plate, and when the vehicle body frame assembly extrudes the sealing piece, the sealing piece deforms and the contact area of the sealing piece and the vehicle body frame assembly is increased.

According to the application, the vehicle body frame assembly, the battery upper cover plate and the battery frame assembly are integrated together, so that the installation and arrangement requirements of various products of the whole vehicle are met, the performance of the whole vehicle can be improved, the production efficiency is improved, the weight and the cost are reduced, the sealing element can deform to increase the contact area with the vehicle body frame assembly when being subjected to pressure, and the sealing performance is improved.

Further, the sealing member includes supporter and deformation body, the deformation body cladding is in on the supporter, the supporter is close to battery upper cover plate one side is provided with the tie coat, the supporter is based on the tie coat is connected to battery upper cover plate, deformation body keep away from supporter one end butt extremely the automobile body frame assembly, the supporter is close to deformation body one side is provided with a plurality of archs along width direction, bellied length direction with the length direction of supporter is the same.

According to the application, the support body with the protruding structure and the deformation body are arranged, so that deformation generated when the deformation body is pressed can be limited, the deformation body can be filled along the part without the protruding structure, and the sealing performance of the deformation body and the vehicle body frame assembly is ensured.

Further, the side of the deformation body far away from the supporting body is arc-shaped.

In the application, the arc-shaped deformation body is arranged, so that the direction of force of the deformation body is directed to the support piece at the axis of the sealing piece when the deformation body is stressed, the deformation body cannot deflect under the action of the support piece, and the sealing performance of the sealing piece is ensured.

Further, a reinforcing core is arranged in the support body along the length direction.

In the application, the reinforcing core is used for ensuring the length dimension of the support body and preventing the length change of the support body, which is easy to cause after deformation in the use process.

Further, the protrusions are symmetrically arranged based on the reinforcing core, and the height of the protrusions arranged away from the reinforcing core is higher than the height of the protrusions arranged close to the reinforcing core.

The cambered surface part in the middle of the deformation body can be extruded into the valleys of the supporting body to form a stable sealing structure, and the deformation caused by stress can not be separated from the vehicle body frame assembly.

Further, the vehicle body frame assembly is composed of a front cabin assembly, a rear cabin assembly, a threshold assembly left and a threshold assembly right which are fixedly connected, wherein the threshold assembly left and the threshold assembly right comprise a threshold beam and a connecting piece.

Further, the bottom surfaces of the front cabin assembly, the rear cabin assembly, the left threshold assembly and the right threshold assembly are on the same plane.

Further, the battery frame assembly comprises a battery frame beam and a limiting sleeve, wherein the limiting sleeve is used for fixedly connecting the battery frame beam to the vehicle body frame assembly, and a gap for installing the sealing element is reserved between the battery frame beam and the vehicle body frame assembly.

According to the application, the position between the battery frame beam and the vehicle body frame assembly is fixed through the limiting sleeve, and the mounting gap is reserved for the sealing element, so that the sealing performance is ensured.

Further, the connecting piece is a screw.

A vehicle includes a vehicle body and a sealing structure of a battery pack-integrated vehicle body as described above.

The invention has the beneficial effects that:

1. According to the application, the vehicle body frame assembly, the battery upper cover plate and the battery frame assembly are integrated together, so that the installation and arrangement requirements of various products of the whole vehicle are met, the performance of the whole vehicle can be improved, the production efficiency is improved, the weight and the cost are reduced, the sealing element can deform to increase the contact area with the vehicle body frame assembly when being subjected to pressure, and the sealing performance is improved.

2. According to the application, the support body with the protruding structure and the deformation body are arranged, so that deformation generated when the deformation body is pressed can be limited, the deformation body can be filled along the part without the protruding structure, and the sealing performance of the deformation body and the vehicle body frame assembly is ensured.

3. In the application, the cambered surface part in the middle of the deformation body can be extruded into the valleys of the support body to form a stable sealing structure, and the deformation caused by stress can not be separated from the vehicle body frame assembly.

Drawings

FIG. 1 is a schematic view of the CTP structure mentioned in the background;

FIG. 2 is an axial schematic view of the sealing system of the present invention;

FIG. 3 is a schematic axle view of the body frame assembly;

FIG. 4 is an exploded view of the body frame assembly;

FIG. 5 is a schematic view of a seal cross-section of the sealing system of the present invention;

FIG. 6 is a schematic cross-sectional view of a sealing surface;

FIG. 7 is a schematic illustration of a preferred construction of the seal;

FIG. 8 is a schematic view of another preferred configuration of the seal in the width direction;

FIG. 9 is a force diagram of the seal when vertically stressed;

FIG. 10 is a force diagram of a seal at manufacturing variances;

wherein,

1. A body frame assembly; 11. a front cabin assembly; 12. a rear compartment assembly; 13. the left side of the threshold assembly; 131. a threshold beam; 132. a connecting piece; 14. the right side of the threshold assembly;

2. a seal; 21. a deformation body; 22. a reinforcing core; 23. a support body; 231. a protrusion; 24. a bonding layer;

3. A battery upper cover plate;

4. a battery frame assembly; 41. a battery frame beam; 42. a limit sleeve;

5. An upper sealing surface;

6. a lower sealing surface;

100. A vehicle body;

200. And a battery.

Detailed Description

Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

As shown in fig. 2to 10, the present application proposes a sealing structure of a battery pack integrated vehicle body, comprising a vehicle body frame assembly 1, a battery upper cover plate 3 and a battery frame assembly 4, which are sequentially connected from top to bottom. A seal 2 is provided between the vehicle body frame assembly 1 and the battery upper cover 3. When the body frame assembly 1 presses the seal member 2, the seal member 2 can be deformed and the contact area with the body frame assembly 1 is increased, thereby ensuring the sealing performance of the seal member 2.

As shown in fig. 3 and 4, the vehicle body frame assembly 1 is composed of a front cabin assembly 11, a rear cabin assembly 12, a rocker assembly left 13, and a rocker assembly right 14. The front and rear compartment assemblies 11, 12 are of unitary cast aluminum construction. The left side 13 of the threshold assembly and the right side 14 of the threshold assembly are both aluminum profile structures. The body frame assembly 1 not only serves as a part of the body frame assembly, but also provides a mounting point for the battery pack integrated body. The bottom surfaces of the front cabin assembly 11, the rear cabin assembly 12, the threshold assembly left 13 and the threshold assembly right 14 are on the same plane, so that a horizontal plane can be formed. The horizontal plane can be used as a sealing surface a, the sealing surface a consists of an aluminum profile with a cavity and an integrated aluminum casting, a reliable basic installation condition is provided for the sealing performance of the sealing element, and the sealing surface a has good rigidity and high precision.

The battery pack consisting of the battery top cover plate 3 and the battery frame assembly 4 provides the sealing member 2 with a lower sealing surface b for installation. The lower sealing surface b is a horizontal surface and has no convex or concave structure. The lower sealing surface b is formed by the battery upper cover plate 3. The battery frame assembly 4 provides support for it. The battery frame assembly 4 is of a cavity structure formed by aluminum profiles, and is reliable in structure and good in rigidity.

The rocker assembly left 13 and the rocker assembly right 14 each include a rocker beam 131 and a connecting member 132. The battery frame assembly 4 includes a battery frame beam 41 and a stopper sleeve 42. When the battery frame assembly 4 is assembled to the vehicle body frame assembly 1, the battery frame beam 41 is fixedly connected to the rocker beam 131 based on the stopper bushings 42 and the connecting members 132. Here the connection 132 may be a bolt, a screw or a screw. The stop collar 42 is used to ensure a clearance value between the upper sealing surface a and the lower sealing surface b to facilitate the installation of the seal 2.

The sealing elements used in the industry generally adopt silica gel foam, PVC sealing strips, TPV sealing strips and TPE sealing strips. The application designs a special EPDM sealing piece for ensuring the reliability and durability of the sealing and considering the cost, the process and the maintainability. As shown in fig. 7, the seal 2 includes a support 23 and a deformation body 21. The deformation body 21 is coated on the supporting body 23, and an adhesive layer 24 is arranged on one side of the supporting body 23 close to the upper battery cover plate 3. The support 23 is connected to the battery upper cover 3 based on an adhesive layer 24. The deformation body 21 is abutted to the vehicle body frame assembly 1 on the side away from the support body 23. The support 23 is provided with a plurality of projections 231 in the width direction on the side close to the deformation body 21. The length direction of the protrusion 231 is the same as the length direction of the support 23. The side of the deformation body 21 remote from the support body 23 is arc-shaped. A reinforcing core 22 is provided in the support 23 in the longitudinal direction.

Preferably, the deformable body 21 is made of foam rubber and is used for deformation when being subjected to pressure; the reinforcing core 22 is a fiber yarn for ensuring the length dimension of the sealing member; the supporting body 23 is compact glue and is used for supporting the deformation body 21; the adhesive layer 24 is an adhesive tape. Preferably, the protrusions 231 may be symmetrically disposed or asymmetrically disposed; further, the protrusion 231 may be an arc-shaped protrusion, a cone-shaped protrusion, or the like. In the present application, the projection 231 is provided for guiding the deformation manner of the deformation body 21 so that the deformation body 21 can be more closely fitted to the body frame assembly.

The protrusions 231 are symmetrically disposed based on the reinforcing core 22, and the height of the protrusions 231 disposed away from the reinforcing core 22 is higher than the height of the protrusions 231 disposed close to the reinforcing core 22. The body frame assembly 1 depresses the seal 2 when the seal 2 is in an assembled or vehicle service condition. The forces applied to the semicircular arc-shaped deformation body 21 are directed to the axial position of the sealing element 2, and the forces are in the position of the support body 23, so that when the peak-shaped support body 23 is stressed, the width of the deformation body 21 is increased after being stressed, and the held self-material is extruded into the valleys between the bulges 231 to form a stable structure, so that the influence on other structures caused by stress deformation can be avoided.

The stress of the sealing element 2 is shown as a vertical stress schematic diagram in fig. 9 under theoretical conditions, the stress state is optimal at the moment, the actual manufacturing tolerance is considered in actual use, the included angle condition exists between the upper sealing surface 5 and the lower sealing surface 6, and the stress F of the sealing element 2 is shown as a force diagram in the manufacturing deviation of fig. 10 at the moment. Because of the semicircular arc deformation body 21 and the peak-shaped support body 23 in the sealing element 2, when the forces under different working conditions are applied, the applied forces can act on the middle part of the support body 23 in the sealing element 2, so that the sealing element 2 is ensured not to turn over and lose efficacy due to the lateral force.

The sealing system of the battery pack integrated vehicle body structure consists of a stable upper sealing surface 5, a reliable lower sealing surface 6 and a sealing element 2 with good sealing effect, wherein the precision, the sealing clearance stability, the sealing surface rigidity of the upper sealing surface 5 and the lower sealing surface 6 and the performance of the sealing element 2 determine the excellent sealing performance of the device structure.

The application also provides a vehicle, which comprises a vehicle body and the sealing structure of the battery pack integrated vehicle body.

The above embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention.

Claims

1. A seal structure of integrated automobile body of battery package, its characterized in that: including automobile body frame assembly (1), battery upper cover plate (3) and battery frame assembly (4) that from the top down connects gradually, automobile body frame assembly (1) with be provided with sealing member (2) between battery upper cover plate (3), work as automobile body frame assembly (1) extrusion sealing member (2) when, sealing member (2) take place deformation and with area of contact of automobile body frame assembly (1) increases.

2. The sealing structure of a battery pack integrated vehicle body according to claim 1, wherein the sealing member (2) comprises a supporting body (23) and a deformation body (21), the deformation body (21) is coated on the supporting body (23), an adhesive layer (24) is arranged on one side, close to the battery upper cover plate (3), of the supporting body (23), the supporting body (23) is connected to the battery upper cover plate (3) based on the adhesive layer (24), one end, away from the supporting body (23), of the deformation body (21) is abutted to the vehicle body frame assembly (1), a plurality of protrusions (231) are arranged on one side, close to the deformation body (21), of the supporting body (23), in the width direction, and the length direction of the protrusions (231) is identical to the length direction of the supporting body (23).

3. The sealing structure of the battery pack-integrated vehicle body according to claim 2, wherein the side of the deformation body (21) remote from the support body (23) is arc-shaped.

4. The sealing structure of a battery pack-integrated vehicle body according to claim 2, wherein a reinforcing core (22) is provided in the support body (23) in the longitudinal direction.

5. The sealing structure of a battery pack-integrated vehicle body according to claim 4, wherein the protrusions (231) are symmetrically disposed based on the reinforcing core (22), and the height of the protrusions (231) disposed away from the reinforcing core (22) is higher than the height of the protrusions (231) disposed close to the reinforcing core (22).

6. The battery pack-integrated vehicle body sealing structure according to claim 1, wherein the vehicle body frame assembly (1) is composed of a front cabin assembly (11), a rear cabin assembly (12), a threshold assembly left (13) and a threshold assembly right (14) which are fixedly connected, and the threshold assembly left (13) and the threshold assembly right (14) each include a threshold beam (131) and a connecting member (132).

7. The sealing structure of a battery pack-integrated vehicle body according to claim 6, wherein bottom surfaces of the front cabin assembly (11), the rear cabin assembly (12), the left rocker assembly (13) and the right rocker assembly (14) are on the same plane.

8. The sealing structure of a battery pack integrated vehicle body according to claim 1, wherein the battery frame assembly (4) includes a battery frame beam (41) and a stopper sleeve (42), the stopper sleeve (42) is used for fixedly connecting the battery frame beam (41) to the vehicle body frame assembly (1), and a gap for mounting the sealing member (2) is preset between the battery frame beam (41) and the vehicle body frame assembly (1).

9. The sealing structure of a battery pack-integrated vehicle body according to claim 6, wherein the connection member (132) is a screw.

10. A vehicle characterized in that it comprises a vehicle body and a sealing structure of the battery pack-integrated vehicle body according to any one of claims 1 to 9.