Vehicle body assembly and vehicle

Abstract

A vehicle body assembly (100) and a vehicle, wherein the vehicle body assembly (100) includes a body (6), a battery pack (5), and a seat mounting cross member (199), the body (6) having a mounting notch (61), the battery pack (5) being provided on the body (6) and shielding the mounting notch (61), the battery pack (5) being arranged to constitute at least a portion of the floor of the vehicle body assembly (100), at least a portion of the seat mounting cross member (199) being located in the mounting notch (61) and connected to the body (6), the seat mounting cross member (199) being a plurality, and at least one seat mounting cross member (199) defining a plurality of cavities.

Description

Technical Field

[0002]

[0001] This application is filed based on the Chinese patent application with application number 202311069700.1 and filing date August 22, 2023, claims the priority of the above Chinese patent application, and incorporates all the content of the above Chinese patent application by reference in this application. This application relates to the field of vehicles, particularly to a vehicle body assembly of a vehicle and a vehicle having the vehicle body assembly.

Background Art

[0002] In the related art, the power battery of a vehicle and the vehicle body exist independently as two separate systems. The power battery of the vehicle and the vehicle body are not related to each other. Since the weights of both the power battery of the vehicle and the vehicle body are large, the overall weight of the vehicle increases, which is disadvantageous for improving the cruising range of the vehicle.

Summary of the Invention

Problems to be Solved by the Invention

[0003] This application aims to solve at least one of the technical problems in the related art to a certain extent.

[0004] For this reason, one object of this application is to provide a vehicle body assembly of a vehicle, which is beneficial for the lightweight design of the vehicle and beneficial for improving the cruising range of the vehicle.

[0005] This application further provides a vehicle.

Means for Solving the Problems

[0006] The vehicle body assembly according to the present invention includes a body body, a battery pack, and a seat mounting cross member, wherein the body body has a mounting notch, the battery pack is provided on the body body and shields the mounting notch, the battery pack is arranged to constitute at least a portion of the floor of the vehicle body assembly, at least a portion of the seat mounting cross member is located in the mounting notch and connected to the body body, the seat mounting cross member is plurality, and at least one of the seat mounting cross member defines a plurality of cavities.

[0007] The vehicle body assembly according to the present invention is advantageous for lightweight vehicle design and improved vehicle range because, by arranging the battery pack to constitute at least a portion of the floor of the vehicle body assembly, a portion of the floor of the conventional vehicle body can be omitted. Furthermore, by providing at least a portion of the seat mounting cross member in a mounting notch and having at least one seat mounting cross member define multiple cavities, the structural strength of the vehicle body assembly is increased, thereby improving vehicle safety.

[0008] The vehicle according to this application includes the vehicle body assembly described above.

[0009] Additional aspects and advantages of the present application are partially shown in the following description, partially become apparent from the following description, or are understood through the implementation of the present application. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram of the vehicle body assembly described in the embodiment of the present invention. [Figure 2] This is a partially enlarged view of the front seat mounting cross member, side sill beam, and seal assembly described in the embodiment of the present invention. [Figure 3] This is a schematic cross-sectional view of the front cross member body described in the embodiment of the present invention. [Figure 4] This is a schematic diagram of the vehicle body assembly described in the embodiment of the present invention. [Figure 5]This is a partially enlarged view of the cross member, side sill beam, and seal assembly after the front seat mounting as described in the embodiment of the present invention. [Figure 6] This is a schematic cross-sectional view of the rear cross member body described in the embodiment of the present invention. [Figure 7] This is a schematic diagram of the vehicle body assembly described in the present embodiment, viewed from another angle. [Figure 8] This is an enlarged view of portion A in Figure 7. [Figure 9] This is a schematic diagram of the side sill beam described in the embodiment of the present invention. [Figure 10] This is a schematic cross-sectional view of some of the structures of the side sill beam, battery pack, and seat mounting cross member described in the embodiment of the present invention. [Figure 11] This is a schematic cross-sectional view of the side sill beam described in the embodiment of the present invention. [Figure 12] This is a schematic cross-sectional view of the side sill beam described in the embodiment of the present invention. [Figure 13] This is a schematic diagram of the structure of the sheet mounting cross member and reinforcing beam described in the embodiment of the present invention. [Figure 14] This is a schematic cross-sectional view of a part of the structure of the vehicle body assembly described in the embodiment of the present invention. [Figure 15] This is a schematic cross-sectional view of a part of the structure of the vehicle body assembly described in the embodiment of the present invention. [Figure 16] This is a plan view of the vehicle body assembly described in the embodiment of the present invention. [Figure 17] This is a bottom view of the vehicle body assembly described in the present embodiment. [Figure 18] This is a schematic cross-sectional view of the vehicle body assembly described in the embodiment of the present invention. [Figure 19] This is an enlarged schematic diagram of a part of the structure in Figure 18. [Figure 20] This is a schematic cross-sectional view of the front end panel described in the embodiment of the present invention. [Figure 21] This is a schematic cross-sectional view of the left seal component described in the embodiment of the present invention. [Figure 22] This is a schematic cross-sectional view of the right seal component described in the embodiment of the present invention. [Figure 23] It is a schematic cross-sectional view of the rear seal component described in the embodiment of the present application. [Figure 24] It is an assembly schematic diagram of the front end panel and the seal assembly described in the embodiment of the present application (the connection arm is omitted). [Figure 25] It is an assembly schematic diagram of the seal assembly described in the embodiment of the present application (the connection arm is omitted).

Mode for Carrying Out the Invention

[0011] The following will explain the embodiments of the present application in detail. The examples of the embodiments are shown in the drawings. Here, the same or similar markings throughout indicate the same or similar elements, or elements having the same or similar functions. The embodiments described with reference to the following drawings are exemplary and are used only for the purpose of explaining the present application and should not be construed as limiting the present application.

[0012] Hereinafter, the vehicle body assembly 100 according to the embodiment of the present application will be described with reference to FIGS. 1 to 23.

[0013] As shown in FIGS. 1 to 23, the vehicle body assembly 100 according to the embodiment of the present application includes a vehicle body main body 6, a battery pack 5, and a seat mounting cross member 199.

[0014] The vehicle body 6 has a mounting notch 61 that penetrates the vehicle body 6 along the vehicle height direction (i.e., the Z direction shown in Figure 18), the battery pack 5 is provided in the vehicle body 6 and the battery pack 5 shields the mounting notch 61, and the battery pack 5 is arranged to constitute at least a portion of the floor of the vehicle body assembly 100, in some selectable embodiments of the present invention, at least a portion of the structure of the battery pack 5 can be located within the mounting notch 61, and the top cover of the battery pack 5 can be arranged as at least a portion of the floor of the vehicle body assembly 100. By having the vehicle body 6 have a mounting notch 61 and arranging the battery pack 5 to constitute at least a portion of the floor of the vehicle body assembly 100, a portion of the floor of the conventional vehicle body can be omitted, thereby reducing the weight of the vehicle body 6, which is advantageous for lightweight vehicle design and advantageous for improving the vehicle's driving range.

[0015] At least a portion of the seat mounting crossmember 199 is located within the mounting notch 61, and the seat mounting crossmember 199 is connected to the vehicle body 6. In some optional embodiments of the present invention, the seat mounting crossmember 199 may be directly connected to the vehicle body 6, or it may be indirectly connected to the vehicle body 6. There may be multiple seat mounting crossmembers 199; for example, there may be two seat mounting crossmembers 199, which may be spaced apart along the longitudinal direction of the vehicle (i.e., the X direction shown in Figure 16). At least one seat mounting crossmember 199 defines multiple cavities.

[0016] Here, the seat mounting cross member 199 can extend along the width direction of the vehicle (i.e., the Y direction shown in Figure 16).

[0017] Furthermore, by positioning at least a portion of the seat mounting cross member 199 within the mounting notch 61, when a side collision occurs, the seat mounting cross member 199 is supported within the mounting notch 61, reducing the degree of crumpling of the mounting notch 61. This protects the safety of passengers in the passenger compartment. Additionally, the support of the seat mounting cross member 199 within the mounting notch 61 reduces the pressing force on the battery pack 5, which is advantageous in reducing the probability of dangerous situations such as thermal runaway or explosion occurring in the battery pack 5.

[0018] As a result, by arranging the battery pack 5 to constitute at least a portion of the floor of the vehicle body assembly 100, a portion of the floor of the conventional vehicle body can be omitted, which is advantageous for lightweight vehicle design and for improving the vehicle's driving range. Furthermore, by providing at least a portion of the seat mounting cross member 199 in the mounting notch 61, and having at least one seat mounting cross member 199 define multiple cavities, it is advantageous for improving the structural strength of the vehicle body assembly 100, which is advantageous for improving vehicle safety.

[0019] In some embodiments of the present invention, as shown in Figures 7 to 13, the vehicle body 6 may include a side sill beam 40 and a reinforcing beam 42.

[0020] Here, the side sill beam 40 can define a dwelling cavity 41, and the side sill beam 40 can extend along the longitudinal direction of the vehicle (i.e., the X direction shown in Figure 7), and the side sill beam 40 can be provided on both sides of the vehicle along the width direction of the vehicle (i.e., the Y direction shown in Figure 7). In some selectable embodiments of the present invention, the side sill beam 40 can include a side sill inner panel 43 and a side sill outer panel 44, the side sill inner panel 43 and the side sill outer panel 44 are arranged along the width direction of the vehicle (i.e., the Y direction shown in Figure 7), and the side sill inner panel 43 and the side sill outer panel 44 can be provided connected, the side sill outer panel 44 is provided on the side away from the vehicle of the corresponding side sill inner panel 43, and the side sill inner panel 43 and the side sill outer panel 44 can jointly define a dwelling cavity 41.

[0021] The reinforcing beam 42 is provided within the housing cavity 41 and is fixed to the side sill beam 40. In some optional embodiments of the present invention, the reinforcing beam 42 may extend along the longitudinal direction of the vehicle (i.e., the X direction shown in Figure 7), and the side sill beam 40 may extend along the longitudinal direction of the vehicle (i.e., the X direction shown in Figure 7). Along the width direction of the vehicle (i.e., the Y direction shown in Figure 7, i.e., the first direction of the vehicle body assembly 100), the orthographic projection of the reinforcing beam 42 and the orthographic projection of the seat mounting cross member 199 have an overlapping region.

[0022] Specifically, a plane is set up, which is perpendicular to the width direction of the vehicle (i.e., the Y direction shown in Figure 7), meaning that the normal to the plane is parallel to the width direction of the vehicle, and the orthographic projection of the reinforcing beam 42 on the plane and the orthographic projection of the seat mounting cross member 199 on the plane have an overlapping region. With this setup, when the vehicle is subjected to a side collision and the reinforcing beam 42 penetrates inward into the vehicle, the orthographic projection of the reinforcing beam 42 and the orthographic projection of the seat mounting cross member 199 of the vehicle have an overlapping region, so the reinforcing beam 42 comes into contact with the seat mounting cross member 199, and the seat mounting cross member 199 can effectively support the reinforcing beam 42, thereby reducing the probability that the reinforcing beam 42 will continue to penetrate inward into the passenger compartment.

[0023] As a result, when the vehicle is subjected to a side collision, the reinforcing beam 42 comes into contact with the seat mounting cross member 199 as it penetrates inward into the vehicle, allowing the seat mounting cross member 199 to effectively support the reinforcing beam 42. This reduces the probability that the reinforcing beam 42 will continue to penetrate inward into the passenger compartment, thereby ensuring the protection of passengers in the passenger compartment of the vehicle and contributing to improved vehicle safety.

[0024] Furthermore, when the vehicle is subjected to a side collision, the impact force received by the reinforcing beam 42 can be transmitted to other structures of the vehicle body via the seat mounting cross member 199.

[0025] In some embodiments of the present invention, along a first direction, the orthographic projection of the reinforcing beam 42 can cover the orthographic projection of the seat mounting cross member 199. Specifically, a plane is set up that is perpendicular to the first direction (i.e., the width direction of the vehicle, i.e., the Y direction as shown in Figure 7), and the orthographic projection of the reinforcing beam 42 in this plane covers the orthographic projection of the seat mounting cross member 199 in this plane, or in other words, the orthographic projection of the seat mounting cross member 199 in this plane is located within the orthographic projection of the reinforcing beam 42 in this plane. By setting them up in this way, the installation positions of the reinforcing beam 42 and the seat mounting cross member 199 can be appropriately adjusted, and when the vehicle is subjected to a side collision, the seat mounting cross member 199 can effectively support the reinforcing beam 42, which is advantageous in improving the safety of the vehicle.

[0026] In some embodiments of the present invention, as shown in Figures 7 to 13, the upper surface of the reinforcing beam 42 may be lower than the upper surface of the seat mounting cross member 199 along the second direction of the vehicle body assembly 100 (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 10), and conversely, the upper surface of the seat mounting cross member 199 may be higher than the upper surface of the reinforcing beam 42. Here, the second direction is perpendicular to the first direction. Alternatively, the upper surface of the reinforcing beam 42 may be flush with the upper surface of the seat mounting cross member 199. By installing them in this manner, the positioning of the reinforcing beam 42 and the seat mounting cross member 199 can be appropriately adjusted, and when the vehicle is subjected to a side collision, the seat mounting cross member 199 can effectively support the reinforcing beam 42, which is advantageous in improving the safety of the vehicle.

[0027] In some embodiments of the present invention, as shown in Figure 10, the distance between the upper surface of the reinforcing beam 42 and the upper surface of the seat mounting cross member 199 may be H1, and H1 can satisfy the relationship 0 mm ≤ H1 ≤ 4 mm. In other words, along the second direction of the vehicle body assembly 100 (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 10), the distance between the upper surface of the reinforcing beam 42 and the upper surface of the seat mounting cross member 199 may be any value from 0 mm to 4 mm, for example, H1 may be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, etc., but is not limited to these. By installing in this manner, the distance between the upper surface of the reinforcing beam 42 and the upper surface of the seat mounting cross member 199 can be made appropriate, and when the vehicle is subjected to a side collision, the seat mounting cross member 199 can effectively support the reinforcing beam 42, which is advantageous in improving the safety of the vehicle.

[0028] In some selectable embodiments of the present invention, the reinforcing beam 42 can be moved downward by setting the upper surface of the reinforcing beam 42 lower than or flush with the upper surface of the seat mounting cross member 199, and setting the distance between the upper surface of the reinforcing beam 42 and the upper surface of the seat mounting cross member 199 to H1, so that the reinforcing beam 42 and other structures of the vehicle (e.g., the battery pack 5) have an overlapping region in the orthographic projection along the first direction of the vehicle body assembly 100 without increasing the dimensions of the reinforcing beam 42 along the second direction, thereby protecting the battery pack 5 with the reinforcing beam 42.

[0029] In some selectable embodiments of the present invention, the upper surface of the reinforcing beam 42 and the upper surface of the seat mounting cross member 199 may be flush with each other. By installing them in this manner, the seat mounting cross member 199 can effectively support the reinforcing beam 42 when the vehicle is subjected to a side collision, which is advantageous in improving vehicle safety.

[0030] In some embodiments of the present invention, as shown in Figure 10, the lower surface of the reinforcing beam 42 is suitable to be lower than the lower surface of the seat mounting cross member 199 along the second direction of the vehicle body assembly 100 (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 10), meaning that the lower surface of the seat mounting cross member 199 may be higher than the lower surface of the reinforcing beam 42. Alternatively, the lower surface of the reinforcing beam 42 may be flush with the lower surface of the seat mounting cross member 199. That is, the lower surface of the seat mounting cross member 199 and the lower surface of the reinforcing beam 42 are at the same height. By installing them in this manner, the installation positions of the reinforcing beam 42 and the seat mounting cross member 199 can be appropriately determined, and when the vehicle is subjected to a side collision, the seat mounting cross member 199 can effectively support the reinforcing beam 42, which is advantageous in improving the safety of the vehicle.

[0031] In some embodiments of the present invention, as shown in Figure 10, the distance between the lower surface of the reinforcing beam 42 and the lower surface of the seat mounting cross member 199 may be H2, and H2 can satisfy the relationship 0 mm ≤ H2 ≤ 16 mm. In other words, along the second direction of the vehicle body assembly 100 (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 10), the distance between the lower surface of the reinforcing beam 42 and the lower surface of the seat mounting cross member 199 may be any value from 0 mm to 16 mm, for example, H2 may be 0 mm, 5 mm, 10 mm, 13 mm, 16 mm, etc., but is not limited to these. In other words, the lower surface of the reinforcing beam 42 may be lower than the lower surface of the seat mounting cross member 199, or the lower surface of the reinforcing beam 42 may be flush with the lower surface of the seat mounting cross member 199.

[0032] By installing it in this manner, the distance between the lower surface of the reinforcing beam 42 and the lower surface of the seat mounting cross member 199 can be appropriately adjusted, so that when the vehicle is subjected to a side collision, the seat mounting cross member 199 can effectively support the reinforcing beam 42, which is advantageous in improving the safety of the vehicle.

[0033] In some selectable embodiments of the present invention, the seat mounting cross member 199 may include a front seat mounting cross member 1 and a rear seat mounting cross member 2, the distance between the lower surface of the reinforcing beam 42 and the lower surface of the rear seat mounting cross member 2 may be H2, and the distance between the upper surface of the reinforcing beam 42 and the upper surface of the rear seat mounting cross member 2 may be H1.

[0034] In some embodiments of the present invention, as shown in Figure 10, the orthographic projection of the reinforcing beam 42 and the orthographic projection of the battery pack 5 can have an overlapping region along a first direction. Specifically, a plane is set up, which is perpendicular to the first direction (i.e., the width direction of the vehicle, i.e., the Y direction shown in Figure 10), and the orthographic projection of the reinforcing beam 42 and the orthographic projection of the battery pack 5 on this plane have an overlapping region. By installing it in this way, the battery pack 5 can be protected by the reinforcing beam 42, and when the vehicle is subjected to a side collision, it is possible to avoid the battery pack 5 being hit or to reduce the impact force received by the battery pack 5, thereby reducing the probability that a dangerous situation such as explosion will occur as a result of the battery pack 5 being hit.

[0035] In some embodiments of the present invention, as shown in Figure 10, the lower surface of the reinforcing beam 42 may be lower than the upper surface of the battery pack 5 along the second direction of the vehicle body assembly 100 (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 10), and the upper surface of the battery pack 5 may be higher than the lower surface of the reinforcing beam 42. Here, the second direction is perpendicular to the first direction. By installing in this manner, the relative position of the reinforcing beam 42 and the battery pack 5 can be appropriately adjusted, so that when the vehicle is subjected to a side collision, the reinforcing beam 42 can protect the battery pack 5, and the probability of dangerous situations such as explosion occurring due to the impact on the battery pack 5 can be reduced.

[0036] In some embodiments of the present invention, as shown in Figure 10, the distance between the lower surface of the reinforcing beam 42 and the upper surface of the battery pack 5 may be H3, and H3 can satisfy the relationship 2mm ≤ H3 ≤ 8mm. In other words, along the second direction of the vehicle body assembly 100 (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 10), the distance between the lower surface of the reinforcing beam 42 and the upper surface of the battery pack 5 may be any value from 2mm to 8mm, for example, H3 may be 2mm, 5mm, 8mm, etc., but is not limited to these. By installing in this manner, the distance between the lower surface of the reinforcing beam 42 and the upper surface of the battery pack 5 can be made appropriate, and when the vehicle is subjected to a side collision, the reinforcing beam 42 can protect the battery pack 5, preventing the battery pack 5 from being hit or reducing the impact force received by the battery pack 5.

[0037] Furthermore, when the vehicle is subjected to a side collision, the impact force received by the reinforcing beam 42 can be transmitted to other structures of the vehicle body via the seat mounting cross member 199, thereby reducing the probability that the reinforcing beam 42 will press against the battery pack 5.

[0038] In some embodiments of the present invention, as shown in Figure 14, the side sill beam 40 and the battery pack 5 are spaced apart along a first direction to form an assembly space 51 for mounting components. In some optional embodiments of the present invention, the battery pack 5 can be mounted on the vehicle body 6 by a bolt connection.

[0039] Along the first direction of the vehicle body assembly 100, that is, the width direction of the vehicle (the Y direction shown in Figure 14), the side sill beam 40 and the battery pack 5 are spaced apart, thereby forming an assembly space 51 for mounting the parts 66. In other words, along the first direction of the vehicle body assembly 100, the side sill beam 40 and the battery pack 5 are installed spaced apart, and an assembly space 51 for mounting the parts 66 is formed between the side sill beam 40 and the battery pack 5. The vehicle body 6 includes two side sill beams 40, and along the first direction of the vehicle body assembly 100, the two side sill beams 40 are installed on both sides of the battery pack 5, and both side sill beams 40 are installed spaced apart from the battery pack 5, thereby forming an assembly space 51 for mounting the parts 66.

[0040] The assembly space 51 can be used to mount vehicle components 66. For example, as shown in Figures 14 and 15, the assembly space 51 can be used to mount vehicle piping 661, and of course, the assembly space 51 can also be used to mount other vehicle components 66, and the present invention is not limited thereto. The present invention will describe the use of the assembly space 51 to mount vehicle piping 661 as an example. The piping 661 may be brake piping 661, electrical piping 661, etc., but is not limited thereto. At least a portion of the piping 661 can be placed within the assembly space 51, and by placing at least a portion of the piping 661 within the assembly space 51, the piping 661 can be protected by the side sill beam 40 and the battery pack 5. Furthermore, compared to the conventional technology, by placing at least a portion of the piping 661 within the assembly space 51, the piping 661 can be moved upward, thereby reducing the probability of the piping 661 being subjected to impacts from stones and debris scattered from the road surface, and reducing the impact force when the piping 661 is subjected to impacts from stones and debris scattered from the road surface, thereby reducing the probability of damage to the piping 661 and being advantageous in extending the service life of the piping 661.

[0041] Therefore, by spacing the side sill beam 40 and the battery pack 5 along the first direction of the vehicle body assembly 100 to form an assembly space 51, at least some of the vehicle's piping 661 can be installed within the assembly space 51, the piping 661 can be protected by the side sill beam 40 and the battery pack 5, and the piping 661 can be moved upward, thereby reducing the probability of damage to the piping 661.

[0042] Furthermore, by installing at least some of the piping 661 within the assembly space 51, damage to the piping 661 can be reduced when the vehicle is subjected to a side collision.

[0043] Furthermore, by installing at least some of the piping 661 within the assembly space 51, maintenance of the piping 661 can be facilitated.

[0044] In some embodiments of the present invention, as shown in Figures 14 and 15, the battery pack 5 may have a battery pack connector 53, which may be bolted to the side sill beam 40. Along a second direction of the vehicle body assembly 100, i.e., the vehicle height direction (i.e., the Z direction shown in Figure 14), the battery pack connector 53 may be located below the assembly space 51, and the battery pack connector 53 may shield the open end of the assembly space 51. By positioning the battery pack connector 53 below the assembly space 51, the battery pack connector 53 can be used to protect components 66 (e.g., piping 661) installed in the assembly space 51, further reducing the probability that the piping 661 installed in the assembly space 51 will be subjected to impacts from stones or debris flying from the road surface, thereby further reducing the probability that the piping 661 will be damaged.

[0045] In some embodiments of the present invention, as shown in Figures 14 and 15, the orthographic projection of the assembly space 51 can be located within the range of the orthographic projection of the battery pack connection section 53 along a second direction, i.e., the vehicle height direction (i.e., the Z direction shown in Figure 1). Specifically, a plane can be set up such that the plane is perpendicular to the vehicle height direction, i.e., the normal of the plane is parallel to the vehicle height direction, and the orthographic projection of the assembly space 51 on the plane can be located within the range of the orthographic projection of the battery pack connection section 53 on the plane. By setting it up in this way, the probability of the piping 661 installed in the assembly space 51 being subjected to impacts from stones and debris scattered from the road surface can be further reduced, thereby further reducing the probability of the piping 661 being damaged.

[0046] In some embodiments of the present invention, as shown in Figures 14 and 15, the distance between the side sill beam 40 and the battery pack connection part 53 along the first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 14), may be I1, where I1 can satisfy the relationship 7mm ≤ I1 ≤ 13mm, meaning the distance between the side sill beam 40 and the battery pack connection part 53 may be any value between 7mm and 13mm. For example, the distance between the side sill beam 40 and the battery pack connection part 53 may be 7mm, 10mm, 13mm, etc., but is not limited to these. By installing in this manner, the distance between the side sill beam 40 and the battery pack connection part 53 can be made appropriate, reducing the probability of interference between the side sill beam 40 and the battery pack connection part 53 when installing the battery pack 5, thereby reducing the difficulty of installing the battery pack 5.

[0047] As some of the selectable embodiments of the present invention, as shown in Figure 14, the side sill beam 40 may include a side sill inner panel 43, the side sill inner panel 43 may include an inner panel body 431 and inner panel connecting plates 432 provided at both ends of the inner panel body 431, and the distance between the inner panel connecting plate 432 at the lower end of the inner panel body 431 and the battery pack connecting portion 53 may be I1 along the first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 14).

[0048] In some embodiments of the present invention, as shown in Figures 14 and 15, the battery pack 5 may further have a battery pack body 52, the battery pack body 52 may be connected to a battery pack connection 53, the side sill beam 40 may be spaced apart from the battery pack body 52 to form an assembly space 51, and the distance between the side sill beam 40 and the battery pack body 52 along the first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 14), may be I2, and I2 may satisfy the relationship 7mm ≤ I2 ≤ 13mm. That is, the distance between the side sill beam 40 and the battery pack body 52 may be any value between 7mm and 13mm, for example, the distance between the side sill beam 40 and the battery pack body 52 may be 7mm, 10mm, 13mm, etc., but is not limited to these. By installing it in this manner, the distance between the side sill beam 40 and the battery pack body 52 can be appropriately adjusted, reducing the probability of interference between the side sill beam 40 and the battery pack body 52 when installing the battery pack 5, thereby reducing the difficulty of installing the battery pack 5.

[0049] Furthermore, I2 can be understood as the distance between the side wall surface of the side sill beam 40 facing the battery pack body 52 and the battery pack body 52. ​​The side wall surface of the side sill beam 40 facing the battery pack body 52 is not necessarily perpendicular to the horizontal plane, and the side wall surface of the side sill beam 40 facing the battery pack body 52 and the battery pack body 52 are not necessarily parallel. Therefore, I2 can be understood as the distance between any position on the inner wall 411 of the side sill beam 40 facing the battery pack body 52 and the battery pack body 52 along the first direction. Alternatively, the distance between the side sill beam 40 and the battery pack body 52 along the first direction can be understood as approximately I2.

[0050] In some selectable embodiments of the present invention, the side sill beam 40 may include a side sill inner panel 43, the side sill inner panel 43 may include an inner panel body 431 and inner panel connecting plates 432 provided at both ends of the inner panel body 431, and the distance between the inner panel body 431 and the battery pack body 52 along a first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 14), may be I2.

[0051] In some embodiments of the present invention, as shown in Figures 14 and 15, the surface of the side sill beam 40 facing the assembly space 51 may have a first recess 49, and along the first direction, the first recess 49 may be recessed away from the battery pack 5. The vehicle body 6 may include two side sill beams 40, and along the first direction of the vehicle body assembly 100, the two side sill beams 40 may be installed on both sides of the battery pack 5, each side sill beam 40 may have a side sill inner panel 43, the surface of the side sill beam 40 facing the assembly space 51 is the same as the surface of the side sill inner panel 43 facing the assembly space 51, and the surface of the side sill inner panel 43 facing the assembly space 51 may have a first recess 49, and along the first direction, the first recess 49 may be recessed away from the battery pack 5. By installing it in this manner, the space in the Y direction of the assembly space 51 can be increased, which makes it easier to install the parts 66 within the assembly space 51, and also provides space for mounting the battery pack 5, which is advantageous for increasing the volume of the battery pack 5, and thereby can increase the driving range of the vehicle.

[0052] In some selectable embodiments of the present invention, the first recess 49 can be positioned below the center of the side sill beam 40 along a second direction of the vehicle body assembly 100, i.e., the vehicle height direction (i.e., the Z direction shown in Figure 14). This positioning allows for appropriate placement of the first recess 49 and reduces the probability of the component 66 (e.g., piping 661) installed in the first recess 49 interfering with the battery pack 5.

[0053] In some embodiments of the present application, as shown in Figures 14 and 15, the distance between the inner wall 411 of the first recess 49 and the battery pack 5 along the first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 1), may be I3, and I3 can satisfy the relationship 23 mm ≤ I3 ≤ 32 mm. Specifically, the distance between the inner wall 411 of the first recess 49 and the battery pack body 52 may be I3, that is, the distance between the inner wall 411 of the first recess 49 and the battery pack body 52 may be any value between 23 mm and 32 mm. For example, the distance between the inner wall 411 of the first recess 49 and the battery pack body 52 may be 23 mm, 27.5 mm, 32 mm, etc., but is not limited to these. By installing it in this manner, the distance between the inner wall 411 of the first recess 49 and the battery pack body 52 can be appropriately set, which not only makes it easier to place the components 66 in the assembly space 51, but also provides space for mounting the battery pack 5, which is advantageous for increasing the volume of the battery pack 5.

[0054] In some embodiments of the present invention, as shown in Figures 14 and 15, the vehicle body assembly 100 may further include a connecting component 64 which can be used to mount a component 66, and the connecting component 64 and the side sill beam 40 are detachably connected. For example, the connecting component 64 can be used to mount a pipe 661.

[0055] In some selectable embodiments of the present invention, the connecting component 64 may have a first connecting portion and a second connecting portion, the first connecting portion may be used to mount a component 66, for example, the first connecting portion may define a first mounting hole, and the piping 661 may be drilled into the first mounting hole, and the second connecting portion may be detachably connected to the side sill beam 40, for example, the second connecting portion may be engaged with the side sill beam 40. By providing the connecting component 64, the component 66 (e.g., piping 661) can be detachably mounted to the side sill beam 40, and the component 66 (e.g., piping 661) can be prevented from swinging within the assembly space 51.

[0056] In some selectable embodiments of the present invention, there may be multiple connecting components 64, and the multiple connecting components 64 may be installed at intervals along the extending direction of the piping 661.

[0057] In some embodiments of the present invention, as shown in Figure 15, the connecting component 64 may have either an engaging portion 65 or an engaging opening 4311, the side sill beam 40 may have the other of the engaging portion 65 and the engaging opening 4311, and the engaging portion 65 may engage with the engaging opening 4311.

[0058] In some selectable embodiments of the present invention, the connecting component 64 may have an engaging portion 65, and the side sill beam 40 may have an engaging opening 4311. In some selectable embodiments of the present invention, the connecting component 64 may have an engaging opening 4311, and the side sill beam 40 may have an engaging portion 65. For example, when the connecting component 64 has an engaging portion 65 and the side sill beam 40 has an engaging opening 4311, the engaging opening 4311 may be located in the side sill inner panel 43 of the side sill beam 40, and the engaging opening 4311 may penetrate the side sill inner panel 43 along the thickness direction of the side sill inner panel 43, the engaging portion 65 may be drilled into the engaging opening 4311 and engage with the surface of the side sill inner panel 43 away from the battery pack 5, or the engaging portion 65 may be drilled into the engaging opening 4311 and engage with the inner wall of the engaging opening 4311. By installing it in this manner, the connecting component 64 can be engaged and connected with the side sill beam 40, thereby ensuring that the component 66 (e.g., piping 661) is securely attached to the side sill beam 40.

[0059] In some optional embodiments of the present invention, the engagement opening 4311 can be provided in the first recess 49.

[0060] In some selectable embodiments of the present invention, the engaging portion 65 may include an engaging column and a plurality of engaging hooks connected to the end of the engaging column, one end of each engaging hook may be connected to the end of the engaging column away from the battery pack 5, and along a first direction, the engaging hooks may extend toward the battery pack 5, and the distance between the engaging hooks and the engaging column gradually increases along the first direction from away from the battery pack 5 toward the battery pack 5.

[0061] In some embodiments of the present invention, as shown in Figures 14 and 15, the battery pack 5 may have a plurality of battery pack connection parts 53, each of which can be connected to a corresponding side sill beam 40. For example, the side sill beam 40 may include a left side sill beam 47 and a right side sill beam 48, and each of the battery pack connection parts 53 can be connected to the corresponding left side sill beam 47 and right side sill beam 48. Specifically, the battery pack 5 may have two battery pack connection parts 53, and along the width direction of the vehicle (i.e., the Y direction shown in Figure 14), the two battery pack connection parts 53 are located on the left and right sides of the battery pack 5, respectively. That is, one of the two battery pack connection parts 53 is installed close to the left side sill beam 47, and the other battery pack connection part 53 is installed close to the right side sill beam 48. The battery pack connection part 53 installed close to the right side sill beam 48 can be connected to the right side sill beam 48, and the battery pack connection part 53 installed close to the left side sill beam 47 can be connected to the left side sill beam 47.

[0062] In some optional embodiments of the present invention, as shown in Figures 14 and 15, the battery pack connection portion 53 is located below the side sill beam 4 and can be connected to the side sill beam 4 by bolts. In some optional embodiments of the present invention, the battery pack connection portion 53 can be connected to the side sill inner panel 43 of the side sill beam 4 by bolts. By installing it in this manner, the battery pack 5 can be connected to the side sill beam 4, and the mounting strength of the battery pack 5 can be increased.

[0063] In some embodiments of the present invention, as shown in Figures 10 to 12, the reinforcing beam 42 is installed at a distance from the inner wall 411 of the housing cavity 41 along a first direction of the vehicle body assembly 100, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 10). Specifically, the reinforcing beam 42 is installed at a distance from the inner wall of the side sill inner panel 43, and the inner wall of the side sill inner panel 43 is understood as the wall of the side sill inner panel 43 facing the housing cavity 41. By installing the reinforcing beam 42 at a distance from the inner wall 411 of the housing cavity 41 along the first direction of the vehicle body assembly 100, a distance can be maintained between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41.

[0064] When a vehicle is subjected to a side collision, there is a gap between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41. Therefore, if the collision force is small, the gap between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 can completely absorb the amount of intrusion of the reinforcing beam 42. This prevents the reinforcing beam 42 from intruding toward the interior of the vehicle and prevents the reinforcing beam 42 from transmitting collision energy to the interior of the vehicle or the battery pack 5. If the collision force is large, the gap between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 can absorb a portion of the amount of intrusion of the reinforcing beam 42. This reduces the amount of intrusion of the reinforcing beam 42 toward the interior of the vehicle and reduces the collision force transmitted by the reinforcing beam 42 to the interior of the vehicle or the battery pack 5.

[0065] As a result, by installing the reinforcing beam 42 with a gap between it and the inner wall 411 of the housing cavity 41 and the first direction of the vehicle body assembly 100, when the vehicle is subjected to a side collision, the gap between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 can absorb the amount of intrusion of the reinforcing beam 42. This prevents the reinforcing beam 42 from intruding into the vehicle, or reduces the amount of intrusion the reinforcing beam 42 intrudes into the vehicle, prevents the reinforcing beam 42 from transmitting collision energy to the interior of the vehicle or the battery pack 5, or reduces the collision force transmitted by the reinforcing beam 42 to the interior of the vehicle or the battery pack 5. This is advantageous in enhancing the impact resistance of the vehicle, is advantageous in protecting the battery pack 5, and can reduce the probability of a safety accident occurring.

[0066] In some optional embodiments of the present invention, the material of the reinforcing beam 42 may be aluminum, but is not limited thereto.

[0067] In some embodiments of the present invention, as shown in Figure 11, the distance between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 may be E1, and E1 can satisfy the relationship 2mm ≤ E1 ≤ 8mm. Specifically, the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 can be spaced apart along the first direction of the vehicle body assembly 100, and the distance between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 may be E1, and E1 may be any value between 2mm and 8mm, for example, E1 may be 2mm, 5mm, 8mm, etc., but is not limited to these. By installing in this manner, the distance between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 can be made appropriate, and the distance between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 can effectively absorb the amount of intrusion of the reinforcing beam 42 and avoid occupying the mounting space of the battery pack 5.

[0068] In some embodiments of the present application, as shown in Figure 11, the distance between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 may be E1 along the first direction, i.e., the width direction of the vehicle (i.e., the Y direction in Figure 11), and the width dimension of the reinforcing beam 42 may be E2, and E1 and E2 can satisfy the relationship 0.04 ≤ E1 / E2 ≤ 0.05. That is, E1 / E2 may be any value between 0.04 and 0.05, for example, E1 / E2 may be 0.04, 0.045, 0.05, etc., but is not limited to these. In one specific embodiment of the present application, the distance E1 between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 may be 5 mm, and the width dimension E2 of the reinforcing beam 42 may be 115 mm, i.e., E1 / E2 may be 0.043478. By installing it in this manner, the ratio relationship between the distance E1 between the reinforcing beam 42 and the inner wall 411 of the housing cavity 41 and the width dimension E2 of the reinforcing beam 42 can be appropriately adjusted, which is advantageous in improving the impact resistance of the vehicle.

[0069] In some embodiments of the present invention, as shown in Figures 7 to 9, the vehicle body assembly 100 may further include a first connecting component 45, at least a portion of which may be located within a housing cavity 41, the first connecting component 45 located at one end of a reinforcing beam 42 along a second direction, the first connecting component 45 connected between a side sill beam 40 and a reinforcing beam 42, and the second direction is perpendicular to the first direction.

[0070] Here, the side sill inner panel 43 may have an inner panel body portion 431, and the end of the inner panel body portion 431 may have an inner panel connecting plate 432, the side sill outer panel 44 may have an outer panel body portion 441, and the end of the outer panel body portion 441 may have an outer panel connecting plate 442, and the inner panel connecting plate 432 is connected to the outer panel connecting plate 442, thereby connecting the side sill inner panel 43 and the side sill outer panel 44, and the inner panel body portion 431 and the outer panel body portion 441 can jointly surround the accommodation cavity 41.

[0071] At least a portion of the first connecting component 45 can be located within the housing cavity 41, and in some optional embodiments of the present invention, a portion of the structure of the first connecting component 45 can be located within the housing cavity 41, and the other portion of the structure of the first connecting component 45 can be located between the inner panel connecting plate 432 and the outer panel connecting plate 442. Along a second direction (i.e., the vehicle height direction, i.e., the Z direction as shown in Figure 8), the first connecting component 45 can be located at one end of the reinforcing beam 42, and the first connecting component 45 can be connected between the side sill beam 40 and the reinforcing beam 42.

[0072] The longitudinal direction (X), width direction (Y), and height direction (Z) of the vehicle described in this application are all perpendicular to each other.

[0073] By providing the first connecting component 45, the side sill beam 40 and the reinforcing beam 42 can be connected, thereby firmly fixing the reinforcing beam 42 within the housing cavity 41. When the vehicle is subjected to a side collision, the first connecting component 45 can restrain the position of the reinforcing beam 42. When the collision force is small, the restraint by the first connecting component 45 prevents the reinforcing beam 42 from penetrating inward into the vehicle. When the collision force is large, the restraint by the first connecting component 45 reduces the amount the reinforcing beam 42 penetrates inward into the vehicle, which is advantageous in improving the impact resistance of the vehicle.

[0074] In some embodiments of the present application, as shown in Figure 9, the first connecting component 45 may include a first connecting plate 451 and a second connecting plate 452 connected to each other, and an angle may be formed between the first connecting plate 451 and the second connecting plate 452. In some optional embodiments of the present application, the cross section of the first connecting component 45 may be configured to be substantially "L" shaped, i.e., the angle between the first connecting plate 451 and the second connecting plate 452 may be 90° or approximately 90°. The first connecting plate 451 may be connected to a reinforcing beam 42, and the second connecting plate 452 may be connected to a side sill beam 40. In some optional embodiments of the present application, the first connecting plate 451 and the second connecting plate 452 may be integrally molded parts.

[0075] In some selectable embodiments of the present invention, the first connecting plate 451 can be connected to the top wall of the reinforcing beam 42, and the second connecting plate 452 can be connected to the inner panel connecting plate 432 of the side sill inner panel 43. Alternatively, the second connecting plate 452 can be connected to the inner panel connecting plate 432 of the side sill inner panel 43, and the second connecting plate 452 can be connected to the outer panel connecting plate 442 of the side sill outer panel 44. For example, the second connecting plate 452 can be installed between the inner panel connecting plate 432 and the outer panel connecting plate 442. By installing it in this manner, the structural form of the first connecting component 45 can be made appropriate, thereby enabling a strong connection between the reinforcing beam 42 and the side sill beam 40.

[0076] As one of several selectable embodiments of the present invention, as shown in Figure 8, the second connecting plate 452 may have a notch 4521 that penetrates the second connecting plate 452 along the thickness direction of the second connecting plate 452, and in an embodiment in which the second connecting plate 452 is installed between the inner panel connecting plate 432 and the outer panel connecting plate 442, by providing the notch 4521 in the second connecting plate 452, the inner panel connecting plate 432 and the outer panel connecting plate 442 can be directly welded through the notch 4521, and the second connecting plate 452 and the inner panel connecting plate 432 can be directly welded, and the second connecting plate 452 and the outer panel connecting plate 442 can be directly welded, thereby allowing any two of the three to have a direct connection relationship, which is advantageous for improving the strength of the connection between the reinforcing beam 42 and the side sill beam 40.

[0077] As some optional embodiments of the present invention, reinforcing ribs 4522 may be provided on the second connecting plate 452 and / or the first connecting plate 451, as shown in Figures 8 and 9. As some optional embodiments of the present invention, weight-reducing holes 4523 may be provided on the second connecting plate 452 and / or the first connecting plate 451.

[0078] In some embodiments of the present invention, as shown in Figures 7 to 9, the vehicle body assembly 100 may further include a second connecting component 46, the second connecting component 46 may be located within a housing cavity 41, the second connecting component 46 may be located at the other end of a reinforcing beam 42 along a second direction, and the second connecting component 46 may be connected between a side sill beam 40 and a reinforcing beam 42.

[0079] Here, the entire structure of the second connecting component 46 can be located within the housing cavity 41. Along the second direction (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 9), the first connecting component 45 can be located at one end of the reinforcing beam 42, and the second connecting component 46 can be located at the other end of the reinforcing beam 42. In other words, along the second direction, the first connecting component 45 and the second connecting component 46 can be located at both ends of the reinforcing beam 42, respectively. By installing them in this manner, the installation positions of the first connecting component 45 and the second connecting component 46 can be appropriately determined, and the space of the housing cavity 41 can be fully utilized. The second connecting component 46 can be connected between the side sill beam 40 and the reinforcing beam 42.

[0080] By providing the second connecting component 46, the side sill beam 40 and the reinforcing beam 42 can be connected, thereby firmly fixing the reinforcing beam 42 within the housing cavity 41. When the vehicle is subjected to a side collision, the second connecting component 46 can restrain the position of the reinforcing beam 42. When the collision force is small, the restraint by the second connecting component 46 prevents the reinforcing beam 42 from penetrating inward into the vehicle. When the collision force is large, the restraint by the second connecting component 46 reduces the amount the reinforcing beam 42 penetrates inward into the vehicle, which is advantageous in improving the impact resistance of the vehicle.

[0081] In some embodiments of the present application, as shown in Figures 8 and 9, the second connecting component 46 may include a connecting component body 461, a first connecting flange 462, and a second connecting flange 463, both of which can be connected to the connecting component body 461. In some optional embodiments of the present application, the connecting component body 461, the first connecting flange 462, and the second connecting flange 463 may be integrally molded parts.

[0082] The connecting component body 461 can be connected to the reinforcing beam 42, the first connecting flange 462 can be connected to the bottom wall of the housing cavity 41, and the second connecting flange 463 can be connected to the inner wall 411 of the housing cavity 41. In some selectable embodiments of the present invention, the connecting component body 461 can be connected to the bottom wall of the reinforcing beam 42, the first connecting flange 462 can be connected to the bottom wall of the inner panel body portion 431 of the side sill inner panel 43, and the second connecting flange 463 can be connected to the inner wall 411 of the housing cavity 41, the inner wall 411 of the housing cavity 41 can be understood as the side wall of the inner panel body portion 431 of the side sill inner panel 43.

[0083] By installing it in this manner, the structural form of the second connecting component 46 can be made appropriate, and the second connecting component 46 can have a connection relationship with the reinforcing beam 42, the bottom wall of the housing cavity 41, and the inner wall 411 of the housing cavity 41, thereby firmly connecting the reinforcing beam 42 and the side sill beam 40.

[0084] As some of the selectable embodiments of this application, the connection method between the side sill outer panel 44 and the side sill inner panel 43, the connection method between the first connecting component 45 and the reinforcing beam 42, the connection method between the first connecting component 45 and the side sill beam 40, the connection method between the second connecting component 46 and the reinforcing beam 42, and the connection method between the second connecting component 46 and the side sill beam 40 may be, but are not limited to, welding, screw connection, riveting, etc.

[0085] In some embodiments of the present application, as shown in FIGS. 8 and 9, the connection component body 461 can include a first plate body 4611, a second plate body 4612, and a third plate body 4613. Here, the first plate body 4611 and the third plate body 4613 are opposed to each other and installed at an interval, and the second plate body 4612 is connected between the first plate body 4611 and the third plate body 4613. Specifically, one end of the second plate body 4612 can be connected to the first plate body 4611, and the other end of the second plate body 4612 can be connected to the third plate body 4613. As some selectable embodiments of the present application, the first plate body 4611, the second plate body 4612, and the third plate body 4613 may be integrally formed components. The second plate body 4612 can be connected to the reinforcing beam 42. As some selectable embodiments of the present application, the second plate body 4612 can be connected to the bottom wall of the reinforcing beam 42.

[0086] As some selectable embodiments of the present application, both the first plate body 4611 and the third plate body 4613 can extend away from the reinforcing beam 42 along the second direction. That is, the first plate body 4611, the second main body part, and the third plate body 4613 can be configured as a substantially "ji" - shaped structure. By installing in this way, the second connection component 46 can have high structural strength.

[0087] A first connection flange 462 can be provided at the end of the first plate body 4611 away from the second plate body 4612, or a first connection flange 462 can be provided at the end of the third plate body 4613 away from the second plate body 4612, or first connection flanges 462 can be provided at both the end of the first plate body 4611 away from the second plate body 4612 and the end of the third plate body 4613 away from the second plate body 4612. As some selectable embodiments of the present application, first connection flanges 462 are provided at both the end of the first plate body 4611 away from the second plate body 4612 and the end of the third plate body 4613 away from the second plate body 4612. By installing in this way, the second connection component 46 can have more first connection flanges 462, and the connection firmness between the second connection component 46 and the side sill beam 40 can be enhanced.

[0088] A second connecting flange 463 can be provided on the side edge of the first plate 4611, or on the side edge of the third plate 4613, or on both the side edge of the first plate 4611 and the side edge of the third plate 4613. In some selectable embodiments of the present invention, a second connecting flange 463 can be provided on both the side edge of the first plate 4611 and the side edge of the third plate 4613, and by installing it in this manner, the second connecting component 46 can have more second connecting flanges 463, further increasing the strength of the connection between the second connecting component 46 and the side sill beam 40.

[0089] Furthermore, along the second direction, the second connecting component 46 can be supported between the reinforcing beam 42 and the side sill beam 40.

[0090] In some optional embodiments of the present invention, the second plate 4612 and / or the first connecting flange 462 may be provided with weight-reducing holes 4523.

[0091] In some optional embodiments of the present invention, both the first connecting part 45 and the second connecting part 46 may be cold-pressed parts.

[0092] In some embodiments of the present invention, as shown in Figure 11, the reinforcing beam 42 can be installed at a distance from the outer wall 412 of the accommodation cavity 41 along a first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 11). Specifically, the reinforcing beam 42 can be installed at a distance from the inner wall of the side sill outer panel 44, the inner wall of the side sill outer panel 44 can be understood as the wall on which the side sill outer panel 44 faces the accommodation cavity 41, in other words, the outer wall 412 of the accommodation cavity 41 can be understood as the side wall of the outer panel body 441 of the side sill outer panel 44. By installing the reinforcing beam 42 at a distance from the outer wall 412 of the housing cavity 41 and along the first direction of the vehicle body assembly 100, when the vehicle is subjected to a side collision, the outer wall 412 of the housing cavity 41 can crumple toward the reinforcing beam 42, absorbing energy and preventing the transmission of collision energy to the interior and battery pack 5, or reducing the impact force transmitted to the interior and battery pack 5, which is advantageous in improving the impact resistance of the vehicle.

[0093] In some embodiments of the present invention, as shown in Figure 11, the distance between the reinforcing beam 42 and the outer wall 412 of the housing cavity 41 may be E3, and E3 can satisfy the relationship 5mm ≤ E3 ≤ 13mm. Specifically, along the first direction of the vehicle body assembly 100, there can be a gap between the reinforcing beam 42 and the outer wall 412 of the housing cavity 41, and the distance between the reinforcing beam 42 and the outer wall 412 of the housing cavity 41 may be E3, and E3 may be any value between 5mm and 13mm, for example, E3 may be 5mm, 8mm, 13mm, etc., but is not limited to these. By installing in this manner, the distance between the reinforcing beam 42 and the outer wall 412 of the housing cavity 41 can be made appropriate, the difficulty of assembling the side sill assembly 4 can be reduced, and the outer wall 412 of the housing cavity 41 can have an appropriate crumple space. In some embodiments of the present invention, as shown in Figure 10, the maximum width of the side sill beam 40 may be E4 and the width of the reinforcing beam 42 may be E2 along the first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 11), and E4 and E2 can satisfy the relationship 0.75E4 ≤ E2 ≤ 0.9E4. That is, E2 may be any value between 0.75E4 and 0.9E4, for example, E2 may be 0.75E4, 0.85E4, 0.9E4, etc., but is not limited to these. In one specific embodiment of the present invention, the maximum width E4 of the side sill beam 40 may be 141.1 mm, and the width dimension E2 of the reinforcing beam 42 may be 115 mm, i.e., E2 may be 0.815E4. By installing in this manner, the ratio relationship between the maximum width E4 of the side sill beam 40 and the width E2 of the reinforcing beam 42 can be appropriately adjusted, which is advantageous for improving the impact resistance of the vehicle.

[0094] The maximum width E4 of the side sill beam 40 may be the total maximum width of the side sill beam 40. In some selectable embodiments of this application, a reinforcing plate may be provided on the outside of the side sill outer panel 44, and the maximum width E4 of the side sill beam 40 may be the width from the reinforcing plate to the side sill inner panel 43.

[0095] In some embodiments of the present invention, as shown in Figures 10 to 12, the reinforcing beam 42 can have a plurality of buffer cavities 423, and the plurality of buffer cavities 423 can be arranged sequentially along a first direction, i.e., the width direction of the vehicle (i.e., the Y direction shown in Figure 11). By installing in this manner, the side impact performance of the reinforcing beam 42 can be effectively improved, which is advantageous for improving the side impact performance of the vehicle. Furthermore, by arranging the plurality of buffer cavities 423 of the reinforcing beam 42 sequentially along the first direction, it is advantageous to reduce the difficulty of manufacturing the reinforcing beam 42 and to improve the manufacturing efficiency of the reinforcing beam 42.

[0096] As some of the selectable embodiments of the present invention, as shown in Figures 10 to 12, the reinforcing beam 42 defines a first cavity 424, and a plurality of partition plates 425 can be provided within the first cavity 424, and the plurality of partition plates 425 can be arranged sequentially at intervals along a first direction, thereby dividing the first cavity 424 into a plurality of buffer cavities 423.

[0097] In some optional embodiments of the present invention, the reinforcing beam 42 may be a single molded part, or the reinforcing beam 42 may be divided into multiple segments and then welded. In some optional embodiments of the present invention, the thickness of both the reinforcing beam 42 and the partition plate 425 may be 4 mm.

[0098] In some embodiments of the present application, as shown in Figure 13, the seat mounting cross member 199 may include a front seat mounting cross member 1 and a front seat mounting cross member 2 spaced apart along a third direction of the vehicle body assembly 100, where the third direction may be the longitudinal direction of the vehicle, i.e., the X direction shown in Figure 7. In some optional embodiments of the present application, the front seat mounting cross member 1 may be installed in front of the front seat mounting cross member 2.

[0099] Along the first direction of the vehicle body assembly 100, the orthographic projection of the reinforcing beam 42 and the vehicle's front seat mounting cross member 1 can have an overlapping region, and the orthographic projection of the reinforcing beam 42 and the vehicle's front seat mounting cross member 2 can also have an overlapping region. With this configuration, when the vehicle is subjected to a side collision, the reinforcing beam 42 will come into contact with the front seat mounting cross member 1 and the front seat mounting cross member 2 as it penetrates inward into the vehicle. The front seat mounting cross member 1 and the front seat mounting cross member 2 can effectively support the reinforcing beam 42, reducing the probability that the reinforcing beam 42 will continue to penetrate inward into the passenger compartment. This ensures the protection of passengers in the vehicle's passenger compartment and is advantageous in improving vehicle safety.

[0100] In some embodiments of the present invention, as shown in Figure 13, the reinforcing beam 42 extends along a third direction (i.e., the longitudinal direction of the vehicle, i.e., the X direction shown in Figure 7), and the reinforcing beam 42 may have opposing first end 421 and second end 422, where the first end 421 is closer to the front seat mounting cross member 1 than the second end 422, and the second end 422 is closer to the rear seat mounting cross member 2 than the first end 421. Along the third direction, the first end 421 is suitable for being installed at a distance from the front seat mounting cross member 1, and the second end 422 is suitable for being installed at a distance from the rear seat mounting cross member 2.

[0101] Furthermore, side sill beams 40 can be provided on both sides of the vehicle along the width direction of the vehicle (i.e., the Y direction shown in Figure 13). Reinforcement beams 42 are provided within the housing cavity 41 of each side sill beam 40. With this setup, the two reinforcement beams 42, the front seat mounting cross member 1, and the front seat mounting cross member 2 can form a roughly U-shaped structure, and the two reinforcement beams 42, the front seat mounting cross member 1, and the front seat mounting cross member 2 can form a complete load transmission path. When the vehicle is subjected to a side collision, the load is effectively transmitted between the two reinforcement beams 42, the front seat mounting cross member 1, and the front seat mounting cross member 2, effectively reducing vehicle body deformation. This ensures that passengers in the passenger compartment are protected, and the battery pack 5 is also protected.

[0102] In some embodiments of the present invention, as shown in Figure 13, the distance between the first end 421 and the front sheet mounting cross member 1 may be H4, and H4 can satisfy the relationship 50 mm ≤ H4 ≤ 70 mm. In the third direction, the first end 421 of the reinforcing beam 42 is located in front of the front sheet mounting cross member 1, and the distance between the first end 421 and the front sheet mounting cross member 1 may be any value between 50 mm and 70 mm. For example, H4 may be 50 mm, 60 mm, 70 mm, etc., but is not limited to these.

[0103] Alternatively, the distance between the second end 422 and the cross member 2 after the front sheet is attached may be H5, and H5 can satisfy the relationship 50mm ≤ H5 ≤ 70mm. In the third direction, the second end 422 of the reinforcing beam 42 is located behind the cross member 2 after the front sheet is attached, and the distance between the second end 422 and the cross member 2 after the front sheet is attached may be any value between 50mm and 70mm. For example, H5 may be 50mm, 60mm, 70mm, etc., but is not limited to these.

[0104] Alternatively, the distance between the first end 421 and the front seat mounting cross member 1 may be H4, and H4 can satisfy the relationship 50mm ≤ H4 ≤ 70mm. The distance between the second end 422 and the front seat mounting cross member 2 may be H5, and H5 can satisfy the relationship 50mm ≤ H5 ≤ 70mm. By installing in this manner, the distance between the first end 421 and the front seat mounting cross member 1 can be appropriately set, and the distance between the second end 422 and the front seat mounting cross member 2 can also be appropriately set, which is advantageous for effectively transmitting the load between the two reinforcing beams 42, the front seat mounting cross member 1, and the front seat mounting cross member 2.

[0105] In some embodiments of the present invention, as shown in Figure 13, the length of the reinforcing beam 42 may be H6, the side sill beam 40 may extend along a third direction, and the length of the side sill beam 40 may be H7, and H6 and H7 can satisfy the relationship 0.66H7 ≤ H6 ≤ 0.76H7. That is, H6 may be any value between 0.66H7 and 0.76H7, for example, H6 may be 0.66H7, 0.71H7, 0.76H7, etc., but is not limited to these. In one specific embodiment of the present invention, the length of the reinforcing beam 42 may be two-thirds of the length of the side sill beam 40. By installing them in this way, the ratio relationship between the length of the reinforcing beam 42 and the length of the side sill beam 40 can be made appropriate, and by making the length of the reinforcing beam 42 smaller than the length of the side sill beam 40, it is advantageous to save material for the reinforcing beam 42, which is advantageous for lightweight vehicle design.

[0106] In some selectable embodiments of the present invention, the length of the reinforcing beam 42 may be adjusted according to the wheelbase of the vehicle, thereby increasing the versatility of the reinforcing beam 42.

[0107] In some embodiments of the present application, as shown in Figures 1 to 3, the front seat mounting front cross member 1 may include a front cross member body portion 10, and the vehicle body assembly 100 may include a first mounting component 11.

[0108] The front cross member body 10 is suitable for connection to the vehicle body, and the front cross member body 10 can extend along a first direction, which may be the width direction of the vehicle (i.e., the Y direction of the vehicle as shown in Figure 1). The front cross member body 10 can be connected to the side sill beam 40 of the vehicle. The front cross member body 10 may have a first mounting portion 101, and in some selectable embodiments of the present application, the first mounting portion 101 may be configured as a second mounting hole 1011, the first mounting portion 101 being suitable for mounting a vehicle seat, for example, the first mounting portion 101 may be located on the top wall of the front cross member body 10, and the first mounting portion 101 may penetrate the top wall of the front cross member body 10 along the thickness direction of the top wall of the front cross member body 10, the vehicle seat can be mounted to the front cross member body 10 by passing a connecting component (e.g., a bolt) through the seat mounting structure, the first mounting portion 101 and bolting it to a nut provided on the front cross member body 10.

[0109] The first mounting component 11 is detachably provided on the front cross member body 10. Here, the first mounting component 11 can be detachably connected to the front cross member body 10, for example, by bolting to the front cross member body 10, or by welding to the front cross member body 10. Even if the first mounting component 11 is welded to the front cross member body 10, it can be removed from the front cross member body 10 by methods such as cutting, and therefore, welding the first mounting component 11 to the front cross member body 10 is also included in the detachable connection described in this application. The first mounting component 11 is suitable for mounting a seat, and for example, the first mounting component 11 can be connected to the seat mounting structure via connecting components (e.g., bolts).

[0110] As one of several selectable embodiments of the present invention, as shown in Figure 2, the top wall of the first mounting component 11 may have a relief notch 113 for accommodating a connecting component (e.g., a bolt).

[0111] Furthermore, since the first mounting part 11 has a certain height, when the first mounting part 11 is attached to the front cross member body 10 without changing the dimensions of the front cross member body 10, and the seat is attached via the first mounting part 11, the seat height can be increased compared to when the seat is attached via the first mounting part 101. Specifically, when it is necessary to increase the seat height, the first mounting part 11 can be attached to the front cross member body 10, and the seat can be attached via the first mounting part 11. When it is necessary to decrease the seat height, the first mounting part 11 can not be attached to the front cross member body 10, or the first mounting part 11 can be removed from the front cross member body 10, and the seat can be attached directly to the front cross member body 10. By installing it in this way, the front cross member body 10 of the same dimensions can be applied to both vehicles with high seats and vehicles with low seats, thereby allowing the front cross member body 10 of the same dimensions to be applied to different vehicle models.

[0112] As a result, by providing a first mounting portion 101 on the front cross member body 10 and a first mounting component 11 on the front cross member body 10 in a removable manner, when it is necessary to lower the seat height, the vehicle seat can be mounted via the first mounting portion 101, and when it is necessary to raise the seat height, the first mounting component 11 can be provided on the front cross member body 10 and the vehicle seat can be mounted via the first mounting component 11. This makes it possible to apply the same dimensions of the front cross member body 10 to different vehicle models, which is advantageous in expanding the range of application of the front seat mounting front cross member 1 and increasing the versatility of the front seat mounting front cross member 1.

[0113] In some optional embodiments of the present invention, a nut may be provided within the first mounting component 11, and the seat can be attached to the first mounting component 11 by engaging the bolt and the nut.

[0114] As some of the selectable embodiments of the present invention, as shown in Figure 1, the number of first mounting components 11 can be multiple, for example, four first mounting components 11 can be installed, the four first mounting components 11 can be spaced apart along the Y direction shown in Figure 1, and can be used to mount one sheet for every two first mounting components 11.

[0115] In some embodiments of the present invention, as shown in Figure 3, the front cross member body portion 10 includes a front cross member top wall 102, a front cross member front side wall 103, a front cross member bottom wall 104, and a front cross member rear side wall 105 that are sequentially connected, and the front cross member top wall 102, front cross member front side wall 103, front cross member bottom wall 104, and front cross member rear side wall 105 can jointly define the front cross member cavity 106. Specifically, one end of the front cross member top wall 102 can be connected to one end of the front cross member front side wall 103, the other end of the front cross member front side wall 103 can be connected to one end of the front cross member bottom wall 104, the other end of the front cross member bottom wall 104 can be connected to one end of the front cross member rear side wall 105, and the other end of the front cross member rear side wall 105 can be connected to the other end of the front cross member top wall 102, and the cross section of the front cross member main body 10 may be a completely closed section. By installing it in this manner, the structural strength of the front cross member main body 10 can be increased.

[0116] Both the first mounting portion 101 and the first mounting component 11 can be provided on the front cross member top wall 102. In some selectable embodiments of the present invention, the first mounting portion 101 can be configured as a second mounting hole 1011, and the first mounting portion 101 can be provided penetrating the front cross member top wall 102. The first mounting component 11 can be provided on the front cross member top wall 102, and in some selectable embodiments of the present invention, the first mounting component 11 can be provided on the outer surface of the front cross member top wall 102. By installing them in this manner, the installation positions of the first mounting portion 101 and the first mounting component 11 can be appropriately adjusted, which is advantageous in reducing the difficulty of installing the vehicle seat.

[0117] As some of the selectable embodiments of the present invention, as shown in Figure 2, the first mounting component 11 may have a plurality of third connecting flanges 111 and a plurality of fourth connecting flanges 112, the plurality of third connecting flanges 111 may be connected to the top wall 102 of the front cross member by bolting or welding, but not limited to these, some of the fourth connecting flanges 112 may be connected to the front side wall 103 of the front cross member by bolting or welding, but not limited to these, and some of the other fourth connecting flanges 112 may be connected to the rear side wall 105 of the front cross member by bolting or welding, but not limited to these. By installing in this manner, the difficulty of installing the first mounting component 11 can be reduced, and the strength of the connection between the first mounting component 11 and the front cross member body 10 can be increased.

[0118] In some selectable embodiments of this application, the plate thickness of the front cross member top wall 102, front cross member front side wall 103, front cross member bottom wall 104, and front cross member rear side wall 105 may all be 1.4 mm. In some selectable embodiments of this application, the material of the front cross member main body 10 may be, but is not limited to, first-generation DP high-tensile steel HC1000 / 1470DP.

[0119] In some selectable embodiments of the present invention, the front cross member body 10 may be an integrally molded part. Conventional seat cross members typically include a left front seat cross member, a right front seat cross member, and a center cross member, and the seat cross member is formed by welding the left front seat cross member, the right front seat cross member, and the center cross member together. Such a seat cross member has a complex structure and cannot reliably transmit the collision force of the vehicle, i.e., it does not have a good load transmission effect. However, in the present invention, the front cross member body 10 may be an integrally molded part. By installing it in this way, the structural strength of the front cross member body 10 can be improved, the torsional rigidity of the vehicle body can also be improved, and the front cross member body 10 can effectively transmit the collision force in both the frontal (X direction) and side (Y direction) collision processes. This reduces the width of the crumple in the vehicle's passenger compartment, which is advantageous in protecting the safety of the occupants and improves the safety performance of the vehicle.

[0120] Furthermore, by constructing the front cross member body 10 as an integrally molded part, the number of parts is reduced, saving on mold costs for parts and development costs for welding jigs, while also reducing man-hours, which is advantageous in lowering the production cost of the front seat mounting front cross member 1. In some selectable embodiments of the present invention, the front cross member body 10 may be a roller press cross member.

[0121] As some of the selectable embodiments of this invention, multiple harness mounting holes can be provided in both the front side wall 103 and the rear side wall 105 of the front cross member, and the vehicle's harness can be drilled into the harness mounting holes, thereby reducing the difficulty of wiring the vehicle.

[0122] In some embodiments of the present invention, as shown in Figure 3, the top wall 102 of the front cross member can be gradually inclined toward the rear wall 105 of the front cross member in the direction from the front side wall 103 of the front cross member to the rear side wall 105 of the front cross member. Specifically, along the X direction shown in Figure 3, and in the direction from the front side wall 103 of the front cross member to the rear side wall 105 of the front cross member, the top wall 102 of the front cross member can be gradually inclined toward the rear side wall 105 of the front cross member. By installing it in this way, the top wall 102 of the front cross member can be fitted with the slide rail of the seat, which is advantageous in reducing the difficulty of installing the seat.

[0123] In some embodiments of the present application, as shown in Figure 3, the front cross member bottom wall 104 may include a first sub-bottom wall 1041 and a second sub-bottom wall 1042, where one end of the first sub-bottom wall 1041 may be connected to the front side wall 103 of the front cross member, the other end of the first sub-bottom wall 1041 may be connected to one end of the second sub-bottom wall 1042, and the other end of the second sub-bottom wall 1042 may be connected to the rear side wall 105 of the front cross member to form a chamfered portion 1043, and the distance between the first connection portion 1045 of the first sub-bottom wall 1041 and the second sub-bottom wall 1042 and the chamfered portion 1043 may be D1, and D1 may satisfy the relationship 5mm ≤ D1 ≤ 20mm. In other words, D1 may be any value between 5mm and 20mm, for example, D1 may be 5mm, 10mm, 12mm, 15mm, 20mm, etc., but is not limited to these. By installing it in this manner, the distance between the first connection portion 1045 between the first sub-bottom wall 1041 and the second sub-bottom wall 1042 and the chamfered portion 1043 can be appropriately adjusted, which is advantageous in increasing the structural strength of the front cross member main body 10. Furthermore, by providing the first connection portion 1045 between the first sub-bottom wall 1041 and the second sub-bottom wall 1042 on the front cross member bottom wall 104, it is advantageous in increasing the structural strength of the front cross member main body 10, and both front cross member main body 10 can effectively transmit the impact force.

[0124] In some selectable embodiments of the present invention, the first sub-bottom wall 1041 and the second sub-bottom wall 1042 can be welded by laser welding, which can smooth the front cross member bottom wall 104 and is advantageous in ensuring the smoothness of the front cross member bottom wall 104. The front cross member main body 10 may be integrally molded, and after molding the front cross member main body 10, the cross section of the front cross member main body 10 can be constructed as a completely closed cross section by welding the first sub-bottom wall 1041 and the second sub-bottom wall 1042 by laser welding.

[0125] In some embodiments of the present application, as shown in Figure 3, the distance between the front side wall 103 and the rear side wall 105 of the front cross member gradually decreases in the direction from the bottom wall 104 to the top wall 102 of the front cross member. Specifically, along the Z direction shown in Figure 3, the distance between the front side wall 103 and the rear side wall 105 of the front cross member gradually decreases in the direction from the bottom wall 104 to the top wall 102 of the front cross member.

[0126] In some selectable embodiments of the present invention, the front side wall 103 of the front cross member may be parallel to the Z direction shown in Figure 3, and the rear side wall 105 of the front cross member is installed to gradually approach the front side wall 103 of the front cross member along the Z direction shown in Figure 3 and in the direction from the bottom wall 104 of the front cross member to the top wall 102 of the front cross member.

[0127] In some selectable embodiments of the present invention, the rear side wall 105 of the front cross member may be parallel to the Z direction shown in Figure 3, and the front side wall 103 of the front cross member is installed to gradually approach the rear side wall 105 of the front cross member along the Z direction shown in Figure 3 and in the direction from the bottom wall 104 of the front cross member to the top wall 102 of the front cross member.

[0128] As one of several selectable embodiments of the present invention, as shown in Figure 3, the front side wall 103 of the front cross member is installed to gradually approach the rear side wall 105 of the front cross member, and the rear side wall 105 of the front cross member is installed to gradually approach the front side wall 103 of the front cross member, along the Z direction shown in Figure 3 and in the direction from the bottom wall 104 of the front cross member to the top wall 102 of the front cross member. Installing it in this manner is advantageous in further increasing the structural strength of the main body portion 10 of the front cross member.

[0129] In some embodiments of the present invention, as shown in Figure 3, at least one of the outer surfaces of the front cross member top wall 102, the front cross member front side wall 103, the front cross member bottom wall 104, and the front cross member rear side wall 105 is flat. In some selectable embodiments of the present invention, as shown in Figure 3, the outer surfaces of the front cross member top wall 102, the front cross member front side wall 103, the front cross member bottom wall 104, and the front cross member rear side wall 105 are all flat. By installing in this manner, the outer surface of the front cross member main body 10 can be made smooth, the difficulty of installing the front cross member main body 10 can be reduced, and the load transmission of the front cross member main body 10 can be made uniform and smooth.

[0130] In some embodiments of the present invention, a second mounting portion can be provided on the inner wall of the front cross member bottom wall 104, and the second mounting portion can be provided corresponding to the first mounting portion 101. In some selectable embodiments of the present invention, the second mounting portion can be configured as a nut, and when the seat is to be mounted without using the first mounting component 11, the vehicle seat can be mounted to the front cross member body 10 by passing a connecting component (e.g., a bolt) through the seat mounting structure and the first mounting portion 101 and bolting it to the second mounting portion.

[0131] The distance between the first connection portion 1045 and the second mounting portion of the first sub-bottom wall 1041 and the second sub-bottom wall 1042 may be D2, and D2 can satisfy the relationship 5mm ≤ D2 ≤ 20mm. In other words, D2 may be any value between 5mm and 20mm, for example, D2 may be 5mm, 10mm, 12mm, 15mm, 20mm, etc., but is not limited to these. By installing it in this way, the distance between the first connection portion 1045 and the second mounting portion of the first sub-bottom wall 1041 and the second sub-bottom wall 1042 can be made appropriate, which is advantageous in improving the structural strength of the front cross member main body 10.

[0132] In some embodiments of the present invention, as shown in Figures 1 and 2, a first relief hole 1044 facing the second mounting portion can be formed in the front cross member bottom wall 104. The first relief hole 1044 can be used to allow a connecting component to pass through. For example, when mounting a seat without using the first mounting component 11, the connecting component (e.g., a bolt) can be passed through the seat mounting structure and the first mounting portion 101, and bolted to the second mounting portion, thereby allowing the vehicle seat to be mounted to the front cross member body 10, and the connecting component can pass through the first relief hole 1044. By installing it in this way, the difficulty of mounting the seat can be reduced, and the degree of seat mounting can be improved.

[0133] As one of several selectable embodiments of the present invention, as shown in Figure 3, D2 can be understood as the distance between the first connection portion 1045 between the first sub-bottom wall 1041 and the second sub-bottom wall 1042 and the center of the first relief hole 1044.

[0134] In some embodiments of the present invention, as shown in Figures 1 and 2, the front seat mounting front cross member 1 may further include a front cross member connecting component 12, the front cross member connecting component 12 may be provided at the end of the front cross member main body 10, and the front cross member connecting component 12 is suitable for connection to the vehicle's side sill beam 40.

[0135] The front cross member body 10 can extend along a first direction, which may be the width direction of the vehicle (i.e., the Y direction of the vehicle). Along the first direction, front cross member connecting parts 12 can be provided at both ends of the front cross member body 10, and the front cross member connecting parts 12 are connected to the vehicle's side sill beam 40 by welding, bolting, or other methods, but are not limited to these.

[0136] As some of the selectable embodiments of the present invention, as shown in Figure 2, the front cross member connecting component 12 may have a plurality of fifth connecting flanges 121, and the fifth connecting flanges 121 may be connected to the side sill beam 40 by bolting or welding, but are not limited to these. As some of the selectable embodiments of the present invention, the fifth connecting flanges 121 may be connected to the side sill inner panel 43 of the side sill beam 40 by bolting or welding, but are not limited to these. By installing in this manner, the front cross member main body 10 can be easily connected to the side sill beam 40, and the difficulty of mounting between the front cross member main body 10 and the vehicle body can be reduced.

[0137] In some embodiments of the present application, as shown in Figures 1 and 2, the distance between the front cross member body 10 and the corresponding side sill beam 40 may be D3, and D3 can satisfy the relationship 3mm ≤ D3 ≤ 7mm. Note that both ends of the front cross member body 10 have side sill beams 40, and the distance between the ends of the front cross member body 10 and the corresponding side sill beams 40 may be D3, and D3 may be any value between 3mm and 7mm. For example, D3 may be 3mm, 5mm, 7mm, etc., but is not limited to these. By installing them in this manner, the distance between the front cross member body 10 and the side sill beam 40 can be appropriately adjusted. By designing D3 to any value between 3mm and 7mm, it is not only possible to guarantee high connection strength between the front cross member body 10 and the side sill beam 40, but when the side of the vehicle collides, the side sill beam 40 is impacted and penetrates towards the front cross member body 10. Because there is a distance between the front cross member body 10 and the corresponding side sill beam 40, the distance can absorb a certain amount of penetration, which is advantageous in reducing the impact force received by the front cross member body 10.

[0138] In some selectable embodiments of the present invention, the distance between the front cross member body 10 and the corresponding side sill inner panel 43 of the side sill beam 40 may be D3.

[0139] In some embodiments of the present invention, as shown in Figures 1 and 2, the vehicle body assembly 100 may further include a seal assembly 7, which may be provided connected to a side sill inner panel 43.

[0140] The front cross member main body 10 is located on top of the sealing component 71 and can be connected to the sealing component 71. Alternatively, the front cross member connecting component 12 can be connected to the sealing component 71. Alternatively, the front cross member main body 10 is located on top of the sealing component 71 and can be connected to the sealing component 71, and the front cross member connecting component 12 can be connected to the sealing component 71.

[0141] As some of the selectable embodiments of the present invention, as shown in Figure 2, the front cross member connecting component 12 may have a plurality of sixth connecting flanges 122, which may be connected to the sealing component 71 by bolting or welding, but are not limited to these.

[0142] By installing it in this manner, the sealing component 71, the front cross member main body 10, and the side sill beam 40 can be connected, which is advantageous for improving the structural strength of the vehicle body.

[0143] In some embodiments of the present invention, the front cross member body 10 can be spaced apart from the battery pack 5. In some selectable embodiments of the present invention, in the vehicle height direction, the front cross member body 10 can be installed above the battery pack, and the front cross member body 10 can be spaced apart from the battery pack 5, where the distance between the front cross member body 10 and the battery pack 5 may be D4, and D4 can satisfy the relationship 5mm ≤ D4 ≤ 11mm, that is, D4 may be any value between 5mm and 11mm, for example, D4 ​​may be 5mm, 8mm, 11mm, etc., but is not limited to these. By installing it in this manner, a safety gap can be provided between the front cross member body 10 and the battery pack 5, and it is possible to avoid the transmission of forces received by the front cross member body 10 to the battery pack 5 via the front cross member body 10, which is advantageous in ensuring the safety of the battery pack during use.

[0144] In some embodiments of the present invention, as shown in Figure 1, both the front cross member top wall 102 and the front cross member front side wall 103 can be connected to the central passage 9 of the vehicle body assembly 100. That is, the central passage 9 can be connected to the front cross member top wall 102, and the central passage 9 can also be connected to the front cross member front side wall 103. By installing them in this manner, the central passage 9 and the front cross member main body 10 can be connected, and when a vehicle collides head-on, the collision force is transmitted to the front cross member main body 10 via the central passage 9, and the front cross member main body 10 can decompose the collision force transmitted via the central passage 9 along the Y direction, which is advantageous in improving the safety of the vehicle body.

[0145] In some embodiments of the present invention, as shown in Figure 1, the distance between the front cross member body 10 and the cross member 2 after the front seat mounting may be D6, and D6 may be any value between 250 mm and 265 mm. By installing in this manner, the distance between the front cross member body 10 and the cross member 2 after the front seat mounting can be appropriately adjusted.

[0146] In some embodiments of the present invention, the front seat mounting rear cross member 2 includes a rear cross member body 20. The rear cross member body 20 can extend along the width direction of the vehicle (i.e., the Y direction shown in Figure 4), and the rear cross member body 20 can be connected to the vehicle's side sill beam 40. The rear cross member body 20 is integrally molded, i.e., the rear cross member body 20 is an integrally molded part, and by configuring the rear cross member body 20 as an integrally molded part, it is advantageous to reduce the number of parts, save on mold costs and welding jig development costs, and reduce man-hours, thereby lowering the production cost of the front seat mounting rear cross member 2. Furthermore, by constructing the rear cross member body 20 as an integrally molded part, the structural strength of the rear cross member body 20 can be increased, and the torsional rigidity of the vehicle body can be further improved. In both frontal (X-direction) and side (Y-direction) collision processes, the rear cross member body 20 can effectively transmit collision forces. This reduces the width of the crumple in the vehicle's occupant compartment, which is advantageous in protecting occupant safety and improves the vehicle's safety performance.

[0147] In some of the selectable embodiments of this application, the rear cross member body 20 may be a roller press cross member.

[0148] The rear crossmember body 20 defines a plurality of rear crossmember cavities 201, which are arranged along a third direction of the front seat mounting rear crossmember 2, where the third direction may be the longitudinal direction of the vehicle (i.e., the X direction shown in Figure 6). In other words, the plurality of rear crossmember cavities 201 are arranged along the longitudinal direction of the vehicle, and at least two adjacent rear crossmember cavities 201 are spaced apart. In some selectable embodiments of the present invention, each pair of adjacent rear crossmember cavities 201 are spaced apart. By defining a plurality of rear crossmember cavities 201 arranged along the third direction in the rear crossmember body 20, the structural strength of the front seat mounting rear crossmember 2 can be improved.

[0149] As a result, by constructing the rear crossmember body 20 as an integrally molded part, the number of parts can be reduced and the structure of the rear crossmember 2 mounted on the front seat can be simplified, which is advantageous in reducing the production cost of the rear crossmember 2 mounted on the front seat. Furthermore, by constructing the rear crossmember body 20 as an integrally molded part and defining a plurality of rear crossmember cavities 201 arranged along the third direction in the rear crossmember body 20, the structural strength of the rear crossmember 2 mounted on the front seat can be improved, and the rear crossmember 2 mounted on the front seat can reliably transmit the collision force of the vehicle, thereby improving the safety of the vehicle.

[0150] In some embodiments of the present invention, as shown in Figure 6, the rear cross member body 20 may include a rear cross member top wall 202, a rear cross member front wall 203, a rear cross member bottom wall 204, and a rear cross member rear wall 205 that are sequentially connected. Specifically, one end of the rear cross member top wall 202 can be connected to one end of the rear cross member front wall 203, the other end of the rear cross member front wall 203 can be connected to one end of the rear cross member bottom wall 204, the other end of the rear cross member bottom wall 204 can be connected to one end of the rear cross member rear wall 205, the other end of the rear cross member rear wall 205 can be connected to the other end of the rear cross member top wall 202, and the rear cross member bottom wall 204 can be connected to the rear cross member top wall 202. In this way, the rear cross member body 20 defines a plurality of rear cross member cavities 201, and by installing it in this manner, the structural strength of the rear cross member body 20 can be increased.

[0151] In some optional embodiments of the present invention, the cross-section of the rear cross member body portion 20 may be a completely closed section.

[0152] In some selectable embodiments of the present invention, the plate thickness of the rear cross member top wall 202, rear cross member front side wall 203, rear cross member bottom wall 204, and rear cross member rear side wall 205 may all be 1.6 mm. In some selectable embodiments of the present invention, the material of the rear cross member main body 20 may be, but is not limited to, first-generation DP high-tensile steel HC1000 / 1470DP.

[0153] In some embodiments of the present application, as shown in Figure 6, the rear cross member bottom wall 204 may have at least one second recess 2041, the second recess 2041 may be recessed toward the rear cross member top wall 202, and the second recess 2041 may be connected to the rear cross member top wall 202, thereby allowing the rear cross member body 20 to define a plurality of rear cross member cavities 201.

[0154] Here, the bottom wall of the second recess 2041 can be connected to the rear cross member top wall 202, specifically, the bottom wall of the second recess 2041 can be connected to the inner surface of the rear cross member top wall 202, there may be one second recess 2041 or there may be multiple second recesses 2041, one second recess 2041 can define two rear cross member cavities 201 in the rear cross member body 20, two second recesses 2041 can define three rear cross member cavities 201 in the rear cross member body 20, and N second recesses 2041 can define (N+1) rear cross member cavities 201 in the rear cross member body 20. By having the rear cross member bottom wall 204 have at least one second recess 2041, and by having the second recess 2041 recess toward the rear cross member top wall 202 and connect with the rear cross member top wall 202, the rear cross member main body 20 can define multiple rear cross member cavities 201, thereby improving the structural strength of the rear cross member main body 20 and improving vehicle safety by ensuring that the rear cross member main body 20 reliably transmits the collision force of the vehicle. Furthermore, by installing it in this way, there is no need to separately provide partition plates or the like to divide the cavities, which is advantageous in simplifying the structure of the rear cross member main body 20 and is advantageous in reducing the difficulty of producing the rear cross member main body 20.

[0155] In some selectable embodiments of the present invention, the multiple rear crossmember cavities 201 defined by the rear crossmember body 20 can be spaced apart along the longitudinal direction of the vehicle. By installing them in this manner, the rear crossmember body 20 can achieve energy absorption by multi-stage crumple when the vehicle is involved in a head-on collision, which is advantageous in improving the vehicle's head-on collision performance.

[0156] In some embodiments of the present application, as shown in Figure 6, the distance between the two opposing side walls of the second recess 2041 along the third direction may be G1, and G1 can satisfy the relationship 18 mm ≤ G1 ≤ 28 mm.

[0157] The second recess 2041, which is recessed toward the top wall 202 of the rear cross member, may have a bottom wall and two opposing side walls connected to each end of the bottom wall. Along the third direction (i.e., the longitudinal direction of the vehicle, i.e., the X direction of the vehicle), the distance between the two opposing side walls of the second recess 2041 may be G1, and G1 may be any value between 18 mm and 28 mm. For example, G1 may be 18 mm, 23 mm, 28 mm, etc., but is not limited to these. By installing it in this way, the distance between the two opposing side walls of the second recess 2041 can be made appropriate, and the distance between the two rear cross member cavities 201 separated by the second recess 2041 can be made appropriate, which is advantageous for improving the structural strength of the rear cross member body 20 and for improving the load transmission capacity of the rear cross member body 20.

[0158] In some embodiments of the present application, as shown in Figure 6, the rear cross member bottom wall 204 may include a third sub-bottom wall 2042 and a fourth sub-bottom wall 2043, the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 being connected, specifically, one end of the third sub-bottom wall 2042 being connected to the rear cross member front side wall 203, the other end of the third sub-bottom wall 2042 being connected to one end of the fourth sub-bottom wall 2043, the other end of the fourth sub-bottom wall 2043 being connected to the rear cross member rear side wall 205, and the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 may be located in a second recess 2041. For example, the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 can be located on one of the two opposing side walls of the second recess 2041, or the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 can be located on the bottom wall of the second recess 2041. By installing it in this way, the installation position of the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 can be appropriately determined, which is advantageous in improving the structural strength of the rear cross member body 20. Furthermore, by providing the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 in the second recess 2041, welding work can be performed within the space defined by the bottom wall and both side walls of the second recess 2041, which is advantageous in reducing the difficulty of manufacturing the rear cross member body 20.

[0159] Furthermore, since the force exerted on the second recess 2041 is small in both head-on and side-impact collisions, providing the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 in the second recess 2041 is advantageous in reducing the force acting on the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043. This is advantageous in improving the impact resistance of the rear cross member main body 20 and in reducing the probability of fracture occurring at the second connection portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043.

[0160] Furthermore, a portion of the structure of the third sub-bottom wall 2042 is configured as a portion of the structure of the second recess 2041, and a portion of the structure of the fourth sub-bottom wall 2043 is configured as another portion of the structure of the second recess 2041.

[0161] In some embodiments of the present invention, as shown in Figure 6, the second connecting portion 2044 can be located on the bottom wall of the second recess 2041. Specifically, the second connecting portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 can be located on the bottom wall of the second recess 2041. This arrangement allows for a more appropriate placement of the second connecting portion 2044 between the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043, which is advantageous in further improving the structural strength of the rear cross member body 20.

[0162] In some selectable embodiments of the present invention, the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 can be joined by roller spot welding. The rear cross member body 20 may be integrally molded, and after molding the rear cross member body 20, the third sub-bottom wall 2042 and the fourth sub-bottom wall 2043 can be joined by roller spot welding to form a completely closed cross section of the rear cross member body 20.

[0163] In some embodiments of the present invention, as shown in Figure 6, the top wall 202 of the rear cross member can be inclined toward the bottom wall 204 of the rear cross member along the third direction and in the direction from the front side wall 203 of the rear cross member to the rear side wall 205 of the rear cross member. Specifically, along the X direction shown in Figure 6 and in the direction from the front side wall 203 of the rear cross member to the rear side wall 205 of the rear cross member, the top wall 202 of the rear cross member can be gradually inclined toward the rear side wall 205 of the rear cross member. By installing it in this way, the top wall 202 of the rear cross member can be fitted into the slide rail of the seat, which is advantageous in reducing the difficulty of installing the seat, and the front seat mounting rear cross member 2 can be used to mount the front seat of the vehicle.

[0164] Furthermore, by structuring the rear cross member top wall 202 to be inclined along the third direction and gradually toward the rear cross member bottom wall 204 in the direction from the rear cross member front wall 203 to the rear cross member rear wall 205, it is advantageous to expand the passenger space for rear-seat passengers, specifically by expanding the leg and foot space for rear-seat passengers, thereby improving the passenger comfort and overall riding experience for rear-seat passengers.

[0165] In some embodiments of the present application, as shown in Figure 6, the rear cross member top wall 202 may include a first sub-top wall 2021 and a second sub-top wall 2022, the first sub-top wall 2021 and the second sub-top wall 2022 being connected, specifically, one end of the first sub-top wall 2021 being connected to the rear cross member front wall 203, the other end of the first sub-top wall 2021 being connected to one end of the second sub-top wall 2022, and the other end of the second sub-top wall 2022 being connected to the rear cross member rear wall 205, and the inclination gradient of the second sub-top wall 2022 may be greater than the inclination gradient of the first sub-top wall 2021.

[0166] Along the third direction and in the direction from the front side wall 203 of the rear cross member to the rear side wall 205 of the rear cross member, the second sub-top wall 2022 can be inclined toward the bottom wall 204 of the rear cross member, and the first sub-top wall 2021 can also be inclined toward the bottom wall 204 of the rear cross member. Here, the first sub-top wall 2021 can be fitted onto the slide rail of the seat, and inclining the first sub-top wall 2021 toward the bottom wall 204 of the rear cross member is advantageous in reducing the difficulty of installing the seat.

[0167] By inclining the second sub-top wall 2022 toward the rear cross member bottom wall 204, the passenger space for rear-seat occupants can be expanded. Specifically, the legroom and foot space for rear-seat passengers can be increased, which is advantageous for improving the comfort of rear-seat passengers and enhancing their riding experience. Furthermore, by making the inclination gradient of the second sub-top wall 2022 greater than that of the first sub-top wall 2021, it is advantageous to further expand the legroom and foot space for rear-seat passengers, which is advantageous for further improving the comfort of rear-seat passengers and allows for the appropriate structural form of the rear cross member top wall 202.

[0168] In some embodiments of the present invention, as shown in Figure 6, the angle between the second sub-top wall 2022 and the first sub-top wall 2021 may be a, where a satisfies the relationship 166° ≤ a ≤ 179°. That is, a may be any angle between 166° and 179°, for example, a may be 166°, 173°, or 179°, but is not limited to these. By setting the angle a between the second sub-top wall 2022 and the first sub-top wall 2021 to any angle between 166° and 179°, the angle a between the second sub-top wall 2022 and the first sub-top wall 2021 can be appropriately set, allowing the rear cross member top wall 202 to be fitted onto the seat slide rail, which is advantageous for increasing the legroom for rear-seat passengers, and does not affect the structural strength of the rear cross member main body 20.

[0169] In some embodiments of the present application, as shown in Figure 6, the distance between the rear cross member front wall 203 and the rear cross member rear wall 205 can gradually increase in the direction from the rear cross member top wall 202 to the rear cross member bottom wall 204. In other words, the distance between the rear cross member front wall 203 and the rear cross member rear wall 205 can gradually decrease in the direction from the rear cross member bottom wall 204 to the rear cross member top wall 202. Specifically, along the Z direction shown in Figure 6, and in the direction from the rear cross member bottom wall 204 to the rear cross member top wall 202, the distance between the rear cross member front wall 203 and the rear cross member rear wall 205 can gradually decrease.

[0170] In some selectable embodiments of the present invention, the rear cross member front wall 203 may be parallel to the Z direction shown in Figure 6, and the rear cross member rear wall 205 is installed to gradually approach the rear cross member front wall 203 along the Z direction shown in Figure 6 and in the direction from the rear cross member bottom wall 204 to the rear cross member top wall 202.

[0171] In some selectable embodiments of the present invention, the rear side wall 205 of the rear cross member may be parallel to the Z direction shown in Figure 6, and the front side wall 203 of the rear cross member is installed to gradually approach the rear side wall 205 of the rear cross member along the Z direction shown in Figure 6 and in the direction from the bottom wall 204 of the rear cross member to the top wall 202 of the rear cross member.

[0172] As one of several selectable embodiments of the present invention, as shown in Figure 6, the rear cross member front wall 203 is installed to gradually approach the rear cross member rear wall 205 along the Z direction shown in Figure 6, and in the direction from the rear cross member bottom wall 204 to the rear cross member top wall 202, and the rear cross member rear wall 205 is installed to gradually approach the rear cross member front wall 203. Installing it in this manner is advantageous in further increasing the structural strength of the rear cross member main body 20.

[0173] In some embodiments of the present application, as shown in Figure 6, the rear cross member bottom wall 204 may have a second recess 2041, the second recess 2041 may have a first side wall adjacent to the rear cross member front side wall 203 and a second side wall away from the rear cross member front side wall 203, where the distance between the rear cross member front side wall 203 and the first side wall is smaller than the distance between the rear cross member rear side wall 205 and the second side wall.

[0174] In other words, the rear cross member body 20 can define two rear cross member cavities 201 arranged along a third direction, and along the third direction, the X-direction length of the rear cross member cavity 201 close to the rear cross member front side wall 203 is smaller than the X-direction length of the rear cross member cavity 201 away from the rear cross member front side wall 203. By installing it in this way, the X-direction lengths of the two rear cross member cavities 201 can be made appropriate, which is advantageous for improving the impact resistance performance of the rear cross member body 20.

[0175] In some embodiments of the present invention, as shown in Figures 4 and 5, a rear crossmember connecting component 22 can be provided at the end of the rear crossmember main body 20. Specifically, the rear crossmember connecting component 22 can be provided at both ends of the rear crossmember main body 20, the rear crossmember main body 20 can extend along the width direction of the vehicle (i.e., the Y direction of the vehicle), and the rear crossmember connecting component 22 can be connected to the vehicle's side sill beam 40 by methods such as welding or bolting, but is not limited to these.

[0176] As some of the selectable embodiments of the present invention, as shown in Figure 5, the rear crossmember connecting component 22 may have a plurality of ninth connecting flanges 221, which may be connected to the side sill beam 40 by bolting or welding, but are not limited to these. As some of the selectable embodiments of the present invention, the ninth connecting flanges 221 may be connected to the side sill inner panel of the side sill beam 40 by bolting or welding, but are not limited to these. By installing it in this manner, the rear crossmember main body 20 can be easily connected to the side sill beam 40.

[0177] In some embodiments of the present invention, as shown in Figure 6, at least one of the outer surfaces of the rear cross member top wall 202, the rear cross member front wall 203, the rear cross member bottom wall 204, and the rear cross member rear wall 205 is flat. In some selectable embodiments of the present invention, as shown in Figure 6, the outer surfaces of the rear cross member top wall 202, the rear cross member front wall 203, and the rear cross member rear wall 205 are all flat. By installing in this manner, the outer surface of the rear cross member main body 20 can be made smooth, the difficulty of installing the rear cross member main body 20 can be reduced, and the load transmission of the rear cross member main body 20 can be made uniform and smooth.

[0178] In some embodiments of the present invention, as shown in Figures 4 and 5, the rear crossmember connecting component 22 can be connected to the side sill beam 40 of the vehicle body. Specifically, the rear crossmember connecting component 22 can be connected to the corresponding side sill beam 40. The distance between the rear crossmember body 20 and the corresponding side sill beam 40 may be F1, and F1 can satisfy the relationship 3mm ≤ F1 ≤ 7mm. Both ends of the rear crossmember body 20 have side sill beams 40, and the distance between the ends of the rear crossmember body 20 and the corresponding side sill beam 40 may be F1, and F1 may be any value between 3mm and 7mm. For example, F1 may be 3mm, 5mm, 7mm, etc., but is not limited to these. By installing them in this manner, the distance between the rear crossmember body 20 and the side sill beam 40 can be appropriately adjusted, and by designing F1 to any value between 3mm and 7mm, it is not only possible to guarantee high connection strength between the rear crossmember body 20 and the side sill beam 40, but when the side of the vehicle collides, the side sill beam 40 is impacted and penetrates towards the crossmember body 20, and because there is a distance between the rear crossmember body 20 and the corresponding side sill beam 40, the distance can absorb a certain amount of penetration, which is advantageous in reducing the impact force received by the rear crossmember body 20.

[0179] In some selectable embodiments of the present invention, the distance between the rear cross member body 20 and the side sill inner panel 43 of the corresponding side sill beam 40 may be F1.

[0180] In some embodiments of the present application, as shown in Figures 4 and 5, the rear cross member body 20 can be located on and connected to the seal component 71. Alternatively, the rear cross member connecting component 22 can be connected to the seal component 71. Alternatively, the rear cross member body 20 can be located on and connected to the seal component 71, and the rear cross member connecting component 22 can be connected to the seal component 71.

[0181] As some of the selectable embodiments of the present invention, as shown in Figure 5, the rear cross member connecting component 22 may have a plurality of 10th connecting flanges 222, which may be connected to the sealing component 71 by bolting or welding, but are not limited to these.

[0182] By installing them in this manner, the sealing component 71, the rear cross member main body 20, and the side sill beam 40 can be connected, which is advantageous in improving the structural strength of the vehicle body.

[0183] In some embodiments of the present invention, as shown in Figure 18, the rear cross member body 20 can be mounted on the battery pack 5, and the rear cross member body 20 can be connected to the battery pack 5.

[0184] In some selectable embodiments of the present invention, the rear cross member body 20 and the battery pack 5 can be arranged with a gap between them.

[0185] In some selectable embodiments of the present invention, the rear cross member body 20 and the battery pack 5 can be connected by methods such as bolt connection or welding, but are not limited to these. By positioning the rear cross member body 20 on top of the battery pack 5 and connecting the rear cross member body 20 to the battery pack 5, when the vehicle is subjected to a side collision, two transmission paths can be formed between the rear cross member body 20 and the beam in the battery pack 5, allowing the load to be transmitted to the non-collision area, which is advantageous in improving vehicle safety, and at the same time, this installation can increase the torsional rigidity of the vehicle body.

[0186] In some embodiments of the present invention, the rear cross member bottom wall 204 may have a third mounting portion, the third mounting portion being suitable for mounting a battery pack 5. Here, the third mounting portion may be configured as a third mounting hole, the third mounting hole may be provided through the rear cross member bottom wall 204 along the thickness direction of the rear cross member bottom wall 204, and the rear cross member main body 20 and the battery pack 5 can be connected by passing a connecting component (e.g., a bolt) through the third mounting portion and the mounting structure of the battery pack 5, and connecting the bolt to a nut provided on the battery pack 5. By installing in this manner, the rear cross member main body 20 and the battery pack 5 can be reliably connected.

[0187] In some embodiments of the present application, the rear cross member bottom wall 204 may have a third mounting portion, and the rear cross member top wall 202 may have a fourth mounting portion corresponding to the third mounting portion, and both the third and fourth mounting portions are suitable for mounting the battery pack 5.

[0188] Here, the third mounting portion can be configured as a third mounting hole, and the third mounting hole can be provided through the rear cross member bottom wall 204 along the thickness direction of the rear cross member bottom wall 204. The fourth mounting portion can be configured as a fourth mounting hole, and the fourth mounting hole can be provided through the rear cross member top wall 202 along the thickness direction of the rear cross member top wall 202. The rear cross member body 20 and the battery pack 5 can be connected by passing a connecting component (e.g., a bolt) through the fourth mounting portion, the third mounting portion, and the mounting structure of the battery pack 5, and connecting the bolt to a nut provided on the battery pack 5. By installing it in this way, the rear cross member body 20 and the battery pack 5 can be reliably connected, and the difficulty of assembling the rear cross member body 20 and the battery pack 5 can be reduced. In some selectable embodiments of the present invention, the rear cross member body 20 and the battery pack 5 can be connected by a plurality of bolts, which can be spaced apart along the width direction of the vehicle (i.e., the Y direction shown in Figure 18).

[0189] In some embodiments of the present invention, the distance between the rear cross member bottom wall 204 and the upper surface of the battery pack 5 along the second direction (i.e., the vehicle height direction, i.e., the Z direction shown in Figure 18) may be F2, and F2 can satisfy the relationship 5mm ≤ F2 ≤ 11mm. That is, D4 may be any value between 5mm and 11mm, and for example, F2 may be 5mm, 8mm, 11mm, etc., but is not limited to these. By installing in this manner, the distance between the rear cross member bottom wall 204 and the battery pack 5 can be appropriately adjusted, which is advantageous for improving the torsional rigidity of the vehicle body.

[0190] In some embodiments of the present invention, as shown in Figures 4 and 5, the vehicle body assembly 100 may further include a second mounting component 21, which may be provided on the rear cross member top wall 202 and which is suitable for mounting a front seat.

[0191] In some selectable embodiments of the present invention, the second mounting component 21 can be attached to the rear cross member top wall 202 by methods such as bolt connection or welding, but is not limited to these. Specifically, the second mounting component 21 can be attached to the outer surface of the rear cross member top wall 202 (i.e., the surface of the rear cross member top wall 202 that is away from the rear cross member bottom wall 204), and the second mounting component 21 can be used to attach the front seat. The height of the front seat can be adjusted by changing the height of the second mounting component 21 in the Z direction. Specifically, if it is necessary to raise the seat height, a second mounting component 21 with a high height in the Z direction can be used, and if it is necessary to lower the seat height, a second mounting component 21 with a low height in the Z direction can be used.

[0192] By installing it in this way, the rear cross member body 20 of the same dimensions can be applied to both vehicles with high seats and vehicles with low seats, thereby allowing the rear cross member body 20 of the same dimensions to be applied to different vehicle types.

[0193] In some selectable embodiments of the present invention, the number of second mounting components 21 can be set to multiple numbers, for example, the number of second mounting components 21 can be set to four, and the four second mounting components 21 can be spaced apart along the Y direction as shown in Figure 4 and used to mount one sheet for every two second mounting components 21.

[0194] As some selectable embodiments of the present invention, as shown in Figure 5, the second mounting component 21 may have a plurality of seventh connecting flanges 211 and a plurality of eighth connecting flanges 212, the plurality of seventh connecting flanges 211 may be connected to the rear cross member top wall 202 by bolting or welding, but not limited to these, some of the plurality of eighth connecting flanges 212 may be connected to the rear cross member front wall 203 by bolting or welding, but not limited to these, and other of the plurality of eighth connecting flanges 212 may be connected to the rear cross member rear wall 205 by bolting or welding, but not limited to these. By installing in this manner, the difficulty of installing the second mounting component 21 can be reduced, and the strength of the connection between the second mounting component 21 and the rear cross member main body 20 can be increased.

[0195] In some optional embodiments of the present invention, a nut may be provided within the second mounting component 21, and the seat can be attached to the second mounting component 21 by engaging the bolt and the nut.

[0196] As one of several selectable embodiments of the present invention, as shown in Figure 5, the top wall of the second mounting component 21 may have a second relief hole 213 for avoiding connecting components (e.g., bolts).

[0197] In some embodiments of the present application, as shown in Figures 16 and 17, the vehicle body assembly 100 may include a seal assembly 7 and a front end panel 621.

[0198] Along the longitudinal direction of the vehicle body 6, the front end panel 321 is located in front of the seal assembly 7, and the front end panel 621 and the seal assembly 7 are connected to form an annular structure. At least some of the seal assembly 7 is located between the vehicle body 6 and the battery pack 5, and in some selectable embodiments of the present invention, some of the seal assembly 7 is located between the vehicle body 6 and the battery pack 5, and in some selectable embodiments of the present invention, the seal assembly 7 is located between the vehicle body 6 and the battery pack 5. The seal assembly 7 can seal the gap between the vehicle body 6 and the battery pack 5.

[0199] At least some of the front end panels 621 are located between the vehicle body 6 and the battery pack 5, and in some selectable embodiments of the present invention, some of the front end panels 621 are located between the vehicle body 6 and the battery pack 5, and in some selectable embodiments of the present invention, the front end panels 621 are located between the vehicle body 6 and the battery pack 5. The front end panels 621 can seal the gap between the vehicle body 6 and the battery pack 5.

[0200] Furthermore, since the battery pack 5 is positioned to constitute at least a portion of the floor of the vehicle body assembly 100, there may be a gap between the battery pack 5 and the vehicle body 6. If a gap exists between the battery pack 5 and the vehicle body 6, the passenger compartment will be connected to the outside through this gap, causing passengers to experience loud noises and vibrations inside the compartment, and allowing a large amount of dust to enter the compartment through the gap between the battery pack 5 and the vehicle body 6, thus affecting passenger comfort. On the other hand, by sealing the gap between the vehicle body 6 and the battery pack 5 with the seal assembly 7 and the front end panel 621, the airtightness of the passenger compartment can be improved. This reduces the noises and vibrations that passengers experience inside the compartment, and prevents a large amount of dust from entering the compartment through the gap between the battery pack 5 and the vehicle body 6, which is advantageous for improving passenger comfort.

[0201] Furthermore, by connecting the seal assembly 7 and the front end panel 621 to form an annular structure, the gap between the vehicle body 6 and the battery pack 5 can be reliably sealed, improving the airtightness of the passenger compartment and thus contributing to improved passenger comfort in the vehicle.

[0202] In some embodiments of the present invention, as shown in Figures 18 and 19, the seal assembly 7 can be located within the mounting notch 61, and the distance between the seal assembly 7 and the upper end of the mounting notch 61 along the height direction of the vehicle body 6 (i.e., the Z direction shown in Figure 18) may be less than the distance between the seal assembly 7 and the lower end of the mounting notch 61.

[0203] By placing the seal assembly 7 within the mounting notch 61, the installation position of the seal assembly 7 can be appropriately adjusted. Furthermore, by setting the distance between the seal assembly 7 and the upper end of the mounting notch 61 to be smaller than the distance between the seal assembly 7 and the lower end of the mounting notch 61, the seal assembly 7 can be positioned closer to the upper part of the mounting notch 61. This provides more space for the battery pack 5, which is advantageous for increasing the capacity of the battery pack 5, and consequently, for increasing the driving range of the vehicle.

[0204] In some of the selectable embodiments of the present invention, the battery pack 5 may be located on the front floor of the vehicle body assembly 100.

[0205] In some embodiments of the present invention, as shown in Figures 16 and 17, the seal assembly 7 can have a third relief hole 71, meaning the seal assembly 7 can have a hollow structure, the third relief hole 71 of the seal assembly 7 can be provided corresponding to a mounting notch 61, the battery pack 5 can shield the third relief hole 71, and the battery pack 5 can also shield the mounting notch 61 of the vehicle body 6. By forming the third relief hole 71 in the seal assembly 7, the weight of the seal assembly 7 can be reduced, which is advantageous for lightweight vehicle design, and the third relief hole 71 can avoid the top surface of the battery pack 5, so the battery pack 5 can be positioned as at least a part of the floor of the vehicle body assembly 100.

[0206] In some embodiments of the present invention, as shown in Figures 18 and 19, the battery pack 5 can be installed below the seal assembly 7 along the height direction of the vehicle body 6 (i.e., the Z direction shown in Figure 18), and the battery pack 5 can be sealed with the lower surface of the seal assembly 7. In some selectable embodiments of the present invention, the upper surface of the battery pack 5 can be sealed with the lower surface of the seal assembly 7. By installing it in this manner, the relative position between the seal assembly 7 and the battery pack 5 can be appropriately adjusted, which is advantageous for improving the sealing effect of the seal assembly 7.

[0207] In some embodiments of the present application, as shown in Figures 16, 17, 25, and 25, both the seal assembly 7 and the front end panel 621 can have a seal projection 721 that protrudes toward the battery pack 5, and the seal projection 721 can protrude downward (i.e. toward the battery pack 5) along the height direction of the vehicle body 6 (i.e., the Z direction shown in Figure 18), and the seal projection 721 of the seal assembly 7 and the seal projection 721 of the front end panel 621 can fit together to form an annular projection structure 72.

[0208] The lower surface of the sealing projection 721 can be sealed to the battery pack 5. In some optional embodiments of the present invention, the lower surface of the sealing projection 721 can be sealed to the upper surface of the battery pack 5. Forming sealing projections 721 projecting toward the battery pack 5 on both the sealing assembly 7 and the front end panel 621 is advantageous in further improving the sealing effect of the sealing assembly 7 and the front end panel 621.

[0209] In some embodiments of the present application, as shown in Figures 16, 17, 20 to 25, the seal assembly 7 may include a left seal component 74, a rear seal component 75, and a right seal component 76. The left seal component 74 and the right seal component 76 may be installed opposite each other and spaced apart along the width direction of the vehicle body 6, and the front end panel 621, the left seal component 74, the rear seal component 75, and the right seal component 76 may be connected sequentially at the front and rear.

[0210] Specifically, one end of the front end panel 621 can be connected to one end of the left seal component 74, the other end of the left seal component 74 can be connected to one end of the rear seal component 75, the other end of the rear seal component 75 can be connected to one end of the right seal component 76, and the other end of the right seal component 76 can be connected to the other end of the front end panel 621. At least one of the left seal component 74, the rear seal component 75, and the right seal component 76 can be connected to the vehicle body 6, and in some selectable embodiments of the present invention, the left seal component 74, the rear seal component 75, and the right seal component 76 can all be connected to the vehicle body 6.

[0211] The left seal component 74, the rear seal component 75, and the right seal component 76 can all have a portion of the projection structure 72 formed on them. Specifically, as shown in Figures 20 to 25, the front end panel 621, the left seal component 74, the rear seal component 75, and the right seal component 76 can all have a seal projection 721 that protrudes toward the battery pack 5. Any of the seal projections 721 of the front end panel 621, the left seal component 74, the rear seal component 75, and the right seal component 76 may all be part of the projection structure 72. The seal projections 721 of the front end panel 621, the left seal component 74, the rear seal component 75, and the right seal component 76 can collectively constitute the projection structure 72.

[0212] By installing them in this manner, the structural form of the seal assembly 7 and the front end panel 621 can be made appropriate, and by connecting at least one of the left seal part 74, the rear seal part 75, and the right seal part 76 to the vehicle body 6, the connection between the seal assembly 7 and the vehicle body 6 can be strengthened, and the formation of protruding structures 72 on the front end panel 621, the left seal part 74, the rear seal part 75, and the right seal part 76 is advantageous in further improving the sealing effect of the seal assembly 7 and the front end panel 621.

[0213] In some optional embodiments of the present invention, the left seal component 74, the rear seal component 75, and the right seal component 76 may be integrally molded parts. In some optional embodiments of the present invention, the left seal component 74, the rear seal component 75, and the right seal component 76 may be separate parts.

[0214] In some embodiments of the present invention, as shown in Figures 18 and 19, the battery pack 5 can have a sealing surface 54, and the lower surface of the sealing projection 721 can fit into the sealing surface 54. In some selectable embodiments of the present invention, the front end panel 621, left sealing component 74, rear sealing component 75, and right sealing component 76 can all have sealing projections 721 projecting toward the battery pack 5, the lower surfaces of the sealing projections 721 of the front end panel 621, left sealing component 74, rear sealing component 75, and right sealing component 76 can be located on the same plane, and the upper surface of the battery pack 5 can be configured as a sealing surface 54, and the sealing surface 54 can fit into the lower surface of the sealing projection 721. For example, the sealing surface 54 may be parallel to the lower surface of the sealing projection 721. By installing in this manner, the sealing performance between the sealing projection 721 and the battery pack 5 can be improved, thereby enabling the sealing assembly 7 and the front end panel 621 to reliably seal the gap between the vehicle body 6 and the battery pack 5, and improving the airtightness of the passenger compartment.

[0215] In some embodiments of the present invention, as shown in Figures 18 and 19, the vehicle body assembly 100 may further include a flexible seal component 55, which can be sandwiched between the battery pack 5 and the seal assembly 7. Specifically, the flexible seal component 55 can be sandwiched between a seal projection 721 and the battery pack 5. By providing the flexible seal component 55 between the battery pack 5 and the seal assembly 7, the flexible seal component 55 is pressed by the battery pack 5 and the seal assembly 7, and the pressed flexible seal component 55 can exhibit an excellent sealing effect.

[0216] In some selectable embodiments of the present invention, both the seal assembly 7 and the front end panel 621 may have a seal projection 721 that protrudes toward the battery pack 5, the lower surface of the seal projection 721 may be sealed with the upper surface of the battery pack 5, and the flexible seal component 55 may be sandwiched between the upper surface of the battery pack 5 and the lower surface of the seal projection 721. By providing the flexible seal component 55, the airtightness of the passenger compartment can be further improved, thereby further improving the passenger comfort of the vehicle.

[0217] In some embodiments of the present invention, as shown in Figures 16 and 17, the vehicle body 6 may include a front compartment 62, a rear floor 63, a left side sill beam 47, and a right side sill beam 48. The front compartment 62 may be connected to the left side sill beam 47 and the right side sill beam 48, and the rear floor 63 may be connected to the left side sill beam 47 and the right side sill beam 48. Here, along the longitudinal direction of the vehicle (i.e., the X direction shown in Figure 16), the front compartment 62 may be installed in front of the rear floor 63, and both the left side sill beam 47 and the right side sill beam 48 may be installed between the front compartment 62 and the rear floor 63, and both the left side sill beam 47 and the right side sill beam 48 may extend along the longitudinal direction of the vehicle. Along the width direction of the vehicle (i.e., the Y direction shown in Figure 16), the left side sill beam 47 and the right side sill beam 48 may be installed with a gap between them. The front compartment 62, rear floor 63, left side sill beam 47, and right side sill beam 48 can jointly define a mounting notch 61. By installing them in this manner, the dimensions of the mounting notch 61 can be increased, which is advantageous for the lightweight design of the vehicle. Furthermore, by jointly defining the mounting notch 61 with the front compartment 62, rear floor 63, left side sill beam 47, and right side sill beam 48, the position of the mounting notch 61 can be appropriately determined, thereby allowing for an appropriate installation position for the battery pack 5 and reducing the impact of the battery pack 5 on the vehicle's trunk space.

[0218] In some embodiments of the present application, as shown in Figures 16 and 17, the left seal component 74 can be connected to the left side sill beam 47, and in some optional embodiments of the present application, the left seal component 74 can be installed on the side of the left side sill beam 47 adjacent to the right side sill beam 48, and the left seal component 74 can have a left connecting flange 742 (as shown in Figure 21), and the left connecting flange 742 can be welded to the left side sill beam 47. The right seal component 76 can be connected to the right side sill beam 48, and in some optional embodiments of the present application, the right seal component 76 can be installed on the side of the right side sill beam 48 adjacent to the left side sill beam 47, and the right seal component 76 can have a right connecting flange 761 (as shown in Figure 22), and the right connecting flange 761 can be welded to the right side sill beam 48. The front end panel 621 can be connected to the front compartment 62, and the rear seal component 75 can be connected to the rear floor 63. By installing it in this manner, the connection between the seal assembly 7 and the vehicle body 6 can be strengthened, reducing the probability of the seal assembly 7 separating from the vehicle body 6, thereby ensuring a secure seal between the vehicle body 6 and the battery pack 5.

[0219] In some optional embodiments of the present invention, the seal assembly 7 can be connected to the vehicle body 6 by welding.

[0220] In some selectable embodiments of the present invention, the left and right sides of the battery pack 5 can be connected to the side sill beams 4, the front of the battery pack 5 can be connected to the bottom of the front end of the vehicle, and the rear of the battery pack 5 can be connected to the rear floor 63 of the vehicle. In some selectable embodiments of the present invention, the battery pack 5 and the vehicle body 6 can be connected by bolts.

[0221] In some embodiments of the present invention, as shown in Figures 16 to 19, the vehicle body assembly 100 may further include a seat mounting cross member 199, which may be mounted on a seal assembly 7 along the height direction of the vehicle body 6 (i.e., the Z direction shown in Figure 18), and the seat mounting cross member 199 may be welded to the seal assembly 7. In some optional embodiments of the present invention, the seat mounting cross member 199 may extend along the width direction of the vehicle body 6 (i.e., the Y direction shown in Figure 18), and both ends of the seat mounting cross member 199 may be welded to a left seal component 74 and a right seal component 76, respectively.

[0222] The battery pack 5 can be connected to the seat mounting cross member 199, and the seat mounting cross member 199 can be installed on top of the battery pack 5 along the height direction of the vehicle body 6 (i.e., the Z direction shown in Figure 18). The battery pack 5 and the seat mounting cross member 199 can be connected by bolts. In some selectable embodiments of the present invention, the battery pack 5 and the seat mounting cross member 199 can be connected by multiple bolts, and the multiple bolts can be installed at intervals along the width direction of the vehicle body 6 (i.e., the Y direction shown in Figure 18). By providing the battery pack 5 connected to the seat mounting cross member 199, the mounting rigidity of the battery pack 5 can be improved, preventing the battery pack 5 from separating from the vehicle. Furthermore, in the event of a side collision, the seat mounting cross member 199 and the battery pack 5 form at least two transmission paths, allowing the load from the side collision to be transmitted to the non-collision area, thereby improving the impact energy resistance of the vehicle and simultaneously improving the torsional rigidity of the vehicle body.

[0223] In some of the selectable embodiments of this invention, the battery pack 5 can be connected to the rear cross member 2 after mounting to the front seat.

[0224] In some optional embodiments of the present invention, the seat mounting cross member 199 may be located between the front compartment 62 and the rear floor 63 along the longitudinal direction of the vehicle (i.e., the X direction as shown in Figure 16).

[0225] In some embodiments of the present application, as shown in Figures 16 and 17, the seal assembly 7 may have a connecting arm 741 that protrudes inward from the seal assembly 7, and the connecting arm 741 may be connected to the seat mounting cross member 199, specifically, the connecting arm 741 may be welded to the seat mounting cross member 199. In some optional embodiments of the present application, the connecting arm 741 may be welded to the bottom of the seat mounting cross member 199. When a vehicle is subjected to a side collision, the connection between the seat mounting cross member 199 and the seal assembly 7 is the main point of load, and by having the seal assembly 7 have a connecting arm 741 that protrudes inward from the seal assembly 7, and by connecting the connecting arm 741 to the seat mounting cross member 199, the connection strength of the connection between the seat mounting cross member 199 and the seal assembly 7 can be improved, thereby improving the impact resistance performance of the vehicle and improving the safety of the vehicle.

[0226] In some embodiments of the present application, as shown in Figures 16 and 17, the seal assembly 7 may include a left seal component 74, a rear seal component 75, and a right seal component 76, and both the left seal component 74 and the right seal component 76 may be connected to the rear seal component 75. Specifically, one end of the front end panel 621 may be connected to one end of the left seal component 74, the other end of the left seal component 74 may be connected to one end of the rear seal component 75, the other end of the rear seal component 75 may be connected to one end of the right seal component 76, and the other end of the right seal component 76 may be connected to the other end of the front end panel 621.

[0227] The left seal component 74 may have a connecting arm 741, which can extend toward the right seal component 76 along the width direction of the vehicle (i.e., the Y direction shown in Figure 16). Alternatively, the right seal component 76 may have a connecting arm 741, which can extend toward the left seal component 74 along the width direction of the vehicle (i.e., the Y direction shown in Figure 16). Alternatively, both the left seal component 74 and the right seal component 76 may have connecting arms 741 that extend toward each other. Furthermore, the seat mounting cross member 199 can be connected to the left seal component 74 and the right seal component 76. Both the left seal component 74 and the right seal component 76 have a connecting arm 741, and by connecting the connecting arm 741 to the seat mounting cross member 199, the connection strength between the seat mounting cross member 199 and the left seal component 74 and the right seal component 76 can be improved, reducing the risk of breakage at the connection point between the seat mounting cross member 199 and the left seal component 74 and the right seal component 76, thereby improving vehicle safety.

[0228] In some embodiments of the present invention, as shown in Figure 16, the length of the connecting arm 741 may be J1, and J1 can satisfy the relationship 60 mm ≤ J1 ≤ 100 mm. That is, the length of the connecting arm 741 may be any value between 60 mm and 100 mm, for example, 60 mm, 80 mm, 100 mm, etc., but is not limited to these. The length of the connecting arm 741 is the length along which the connecting arm 741 is aligned with the width direction of the vehicle (i.e., the Y direction shown in Figure 16). By installing it in this way, the length of the connecting arm 741 can be made appropriate, the connection strength between the left seal component 74 and / or the right seal component 76 and the seat mounting cross member 199 can be reliably improved, and the risk of breakage occurring at the connection between the seat mounting cross member 199 and the left seal component 74 and the right seal component 76 can be reduced.

[0229] Furthermore, since many parts in the vehicle body assembly 100 are not perfectly molded, the dimensions of parts with irregular shapes can be understood as the dimensions of the part at any position along a given direction. The distance between a part with an irregular shape and other parts can be understood as the distance between any positions of the two parts along a given direction.

[0230] As one of several selectable embodiments of the present invention, as shown in Figure 1, the distance between the front cross member body 10 and the front seal component 73 may be D5, and D5 may be any value between 260 mm and 298 mm. As shown in Figure 4, the distance between the rear cross member body 20 and the front seal component 73 may be F3, and F3 may be any value between 620 mm and 680 mm. By installing in this manner, the distance between the front cross member body 10 and the front seal component 73, and the distance between the rear cross member body 20 and the front seal component 73 can be appropriately adjusted.

[0231] The vehicle according to the embodiment of the present invention includes the above-described vehicle body assembly 100, and by arranging the battery pack 5 to constitute at least a portion of the floor of the vehicle body assembly 100, a portion of the floor of the conventional vehicle body can be omitted, which is advantageous for lightweight vehicle design and for improving the vehicle's driving range. Furthermore, by providing at least a portion of the seat mounting cross member 199 in the mounting notch 61, and by having at least one seat mounting cross member 199 define multiple cavities, it is advantageous to increase the structural strength of the vehicle body assembly 100, thereby advantageous for improving vehicle safety.

[0232] Furthermore, in the description of this application, terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" indicate directions or positional relationships, which are shown based on the drawings. These terms merely facilitate and simplify the description of this application and do not indicate or imply that the indicated devices or elements have a specific direction, or that they should be composed of and operated in a specific direction. Therefore, they should not be understood as limiting this application.

[0233] In the description of this application, "first feature" and "second feature" may include one or more such features.

[0234] In the description of this application, "multiple" means two or more.

[0235] In the description of this application, "above" or "below" the first feature of the second feature may include cases where the first and second features are in direct contact, and may also include cases where the first and second features are not in direct contact but are in contact via other features between them.

[0236] In the description of this application, the positioning of the first feature "above," "above," and "above" the second feature includes the positioning of the first feature directly above or diagonally above the second feature, or simply indicates that the horizontal altitude of the first feature is higher than that of the second feature.

[0237] In this specification, references to the terms “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” mean that the specific features, structures, materials, or properties described in combination with the embodiments or described in the examples are included in at least one embodiment or example of this application. The exemplary expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in appropriate ways in any embodiment or example.

[0238] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is limited by the claims and their equivalents. [Explanation of Symbols]

[0239] Body assembly 100, seat mounting cross member 199, Front seat mounting front cross member 1, front cross member main body 10, first mounting part 101, second mounting hole 1011, front cross member top wall 102, front cross member front side wall 103, front cross member bottom wall 104, first sub bottom wall 1041, second sub bottom wall 1042, chamfered part 1043, first relief hole 1044, first connection part 1045, front cross member rear side wall 105, front cross member cavity 106, First mounting part 11, third connecting flange 111, fourth connecting flange 112, relief notch 113, Front cross member connecting part 12, fifth connecting flange 121, sixth connecting flange 122, Front seat mounting cross member 2, rear cross member main body 20, rear cross member cavity 201, rear cross member top wall 202, first sub top wall 2021, second sub top wall 2022, rear cross member front side wall 203, rear cross member bottom wall 204, second recess 2041, third sub bottom wall 2042, fourth sub bottom wall 2043, second connection part 2044, rear cross member rear side wall 205, Second mounting part 21, seventh connecting flange 211, eighth connecting flange 212, second relief hole 213 Rear cross member connecting part 22, 9th connecting flange 221, 10th connecting flange 222, Side sill beam 40, housing cavity 41, inner wall 411, outer wall 412, reinforcing beam 42, first end 421, second end 422, buffer cavity 423, first cavity 424, partition plate 425, Side sill inner panel 43, inner panel main body 431, engagement opening 4311, inner panel connecting plate 432, Side sill outer panel 44, outer panel main body 441, outer panel connecting plate 442, First connecting part 45, first connecting plate 451, second connecting plate 452, notch 4521, reinforcing rib 4522, weight reduction hole 4523, Second connecting part 46, connecting part body 461, first plate 4611, second plate 4612, third plate 4613, first connecting flange 462, second connecting flange 463, Left side sill beam 47, right side sill beam 48, first recess 49, Battery pack 5, assembly space 51, battery pack main body 52, battery pack connection part 53, sealing surface 54, flexible sealing part 55, Body 6, Mounting notch 61, Front compartment 62, Front end panel 621, Rear floor 63, Connecting parts 64, Engaging parts 65, Parts 66, Piping 661, Seal assembly 7, third relief hole 71, projection structure 72, seal projection 721, left seal part 74, connecting arm 741, left connecting flange 742, rear seal part 75, right seal part 76, right connecting flange 761, Middle aisle 9.

Claims

1. A vehicle body assembly, Including the vehicle body, battery pack, and seat mounting cross member, The aforementioned vehicle body has mounting notches, The battery pack is provided on the vehicle body and shields the mounting notch, and the battery pack is arranged to constitute at least a portion of the floor of the vehicle body assembly. A vehicle body assembly wherein at least a portion of the seat mounting crossmember is located in the mounting notch and connected to the vehicle body, and there are multiple seat mounting crossmembers, with at least one of the seat mounting crossmembers defining multiple cavities.

2. The vehicle body assembly according to claim 1, wherein the vehicle body includes a side sill beam and a reinforcing beam, the side sill beam defines a housing cavity, the reinforcing beam is provided within the housing cavity and fixed to the side sill beam, and along a first direction of the vehicle body, the orthographic projection of the reinforcing beam and the orthographic projection of the seat mounting cross member have an overlapping region.

3. The vehicle body assembly according to claim 2, wherein the orthographic projection of the reinforcing beam and the orthographic projection of the battery pack have an overlapping region along the first direction.

4. The vehicle body assembly according to claim 2 or 3, wherein the side sill beam and the battery pack are spaced apart along the first direction to form an assembly space for mounting components.

5. The vehicle body assembly according to claim 4, wherein the battery pack has a battery pack connection portion, and along a second direction of the vehicle body, the battery pack connection portion is located below the assembly space, thereby shielding the open end of the assembly space, and the second direction is perpendicular to the first direction.

6. The vehicle body assembly according to any one of claims 2-5, wherein the battery pack has a plurality of battery pack connection parts, and each of the plurality of battery pack connection parts is connected to the corresponding side sill beam.

7. A vehicle body assembly according to any one of claims 2-6, wherein the reinforcing beam and the inner wall of the housing cavity are spaced apart along the first direction.

8. The vehicle body assembly of any one of claims 2-7, wherein the seat mounting cross member includes a front seat mounting cross member and a front seat mounting cross member spaced apart along a third direction of the vehicle body, the reinforcing beam extends along the third direction and has opposing first and second ends, the first end being suitable for spacing with the front seat mounting cross member and the second end being suitable for spacing with the front seat mounting cross member along the third direction, and the third direction is perpendicular to the first direction.

9. The vehicle body assembly according to claim 8, wherein the front seat mounting rear cross member includes a rear cross member body, the rear cross member body defines a plurality of rear cross member cavities, the plurality of rear cross member cavities are arranged along the third direction, and at least two adjacent rear cross member cavities are spaced apart.

10. The vehicle body assembly according to claim 8 or 9, wherein the rear cross member after front seat mounting includes opposing rear cross member bottom walls and rear cross member top walls, the rear cross member bottom walls include at least one recess that recesses toward the rear cross member top wall, and the recess is connected to the rear cross member top wall so that the rear cross member body defines a plurality of rear cross member cavities.

11. A vehicle body assembly according to any one of claims 1 to 10, further comprising a seal assembly and a front end panel, wherein the front end panel is located in front of the seal assembly along a third direction of the vehicle body, and the front end panel is connected to the seal assembly to form an annular structure, and at least a portion of the seal assembly and at least a portion of the front end panel are both located between the vehicle body and the battery pack to seal the gap between the vehicle body and the battery pack.

12. The vehicle body assembly according to claim 11, wherein both the seal assembly and the front end panel have seal protrusions that project toward the battery pack, and the seal protrusions of the seal assembly and the seal protrusions of the front end panel fit together to form an annular protruding structure, thereby sealing the lower surface of the seal protrusions and the battery pack.

13. The seal assembly includes a left seal component, a right seal component, and a rear seal component, the left seal component and the right seal component are arranged opposite each other and spaced apart along the first direction of the vehicle body, and the front end panel, the left seal component, the rear seal component, and the right seal component are connected sequentially at the front and rear ends. The vehicle body assembly according to claim 12, wherein at least one of the left seal component, the rear seal component, and the right seal component is connected to the vehicle body, and the left seal component, the rear seal component, and the right seal component all have the portion of the protruding structure formed thereon, where the first direction is perpendicular to the third direction.

14. The vehicle body includes a front compartment, a rear floor, a left side sill beam, and a right side sill beam, and the front compartment, the rear floor, the left side sill beam, and the right side sill beam jointly define the mounting notch. The vehicle body assembly according to claim 13, wherein the left seal component is connected to the left side sill beam, the right seal component is connected to the right sill beam, the front end panel is connected to the front compartment, and the rear seal component is connected to the rear floor.

15. A vehicle body assembly according to any one of claims 11-14, wherein the seat mounting cross member is provided on and connected to the seal assembly along a second direction of the vehicle body, and the battery pack is connected to the seat mounting cross member.

16. The vehicle body assembly according to any one of claims 11-15, wherein the seal assembly is located within the mounting notch, and along the second direction of the vehicle body, the distance between the seal assembly and the upper end of the mounting notch is less than the distance between the seal assembly and the lower end of the mounting notch.

17. A vehicle comprising a vehicle body assembly of the vehicle according to any one of claims 1-16.

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