vehicle

Abstract

Disclosed is a vehicle including a lower body, a rear subframe, and a battery pack. The rear subframe is connected to the lower body. The battery pack is connected to the lower body and is provided below the lower body. A front end surface of the rear subframe is formed as a stopper surface extending rearward of the battery pack, and an upper surface of at least a portion of the battery pack is formed as a floor of the vehicle body.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of a Chinese patent application with an application number of 202210346551.8 and a title of "Vehicle", which was filed with the China National Intellectual Property Administration on March 31, 2022, and all of its contents are incorporated herein by reference.

[0002] This disclosure relates to the field of vehicles, particularly to vehicles.

Background Art

[0003] In related technologies, in conventional new - energy vehicles, in order to install a battery pack, generally, a battery - pack mounting side member is provided below the floor of the vehicle body. However, due to the structure of the lower vehicle body, the space available for the battery pack is small, and a large gap is formed between the battery pack and the vehicle body floor, which not only affects the cruising range of the vehicle but also affects the passing performance of the vehicle.

Summary of the Invention

[0004] This disclosure attempts to solve at least one of the technical problems in the prior art. For this purpose, this disclosure provides a vehicle with high space utilization rate and excellent safety performance.

[0005] The vehicle according to an embodiment of this disclosure includes a lower vehicle body, a rear sub - frame, and a battery pack. The rear sub - frame is connected to the lower vehicle body. The battery pack is connected to the lower vehicle body and is provided below the lower vehicle body. The front end face of the rear sub - frame is formed as a stopper surface extending behind the battery pack, and at least a part of the upper surface of the battery pack is formed as the floor of the vehicle body.

[0006] According to the vehicle of the embodiment of this disclosure, by forming the front end surface of the rear subframe as a stopper surface extending behind the battery pack, the dimensions of the battery pack in the longitudinal direction can be increased, improving space utilization, and the battery pack can transmit force as a force transmission structure, thereby improving the safety performance of the vehicle. By forming at least a portion of the upper surface of the battery pack as the floor of the vehicle body, the vertical space of the vehicle can be improved, improving space utilization and passenger space.

[0007] In some embodiments, the minimum distance between the rear end face of the battery pack and the front end face of the rear subframe is L, where L satisfies the condition 10 mm ≤ L ≤ 100 mm.

[0008] In some embodiments, the lower body further includes a first side sill and a second side sill. The second side sill and the first side sill are provided opposite each other in the width direction of the body, and the battery pack is connected to the first side sill and the second side sill, so that the first side sill and the second side sill are formed as a battery pack mounting beam.

[0009] In some embodiments, the lower body includes two rear side members. The two rear side members are spaced apart in the width direction of the body, and the height of the front bottom surface of the rear side members in the vehicle height direction is greater than the height of the top surface of the battery pack in the vehicle height direction.

[0010] In some embodiments, the lower body further includes a rear cross member. The rear cross member extends along the width direction of the vehicle and is connected to the rear side member, the first side sill, and the second side sill.

[0011] In some embodiments, the rear cross member is formed as a battery pack mounting beam. The lower surface of the rear cross member and the top surface of the battery pack are spaced vertically apart to form a sealing gap.

[0012] In some embodiments, the rear cross member includes a left rear cross member connecting plate, a right rear cross member connecting plate, and a rear cross member body. The left rear cross member connecting plate, the rear cross member body, and the right rear cross member connecting plate are connected in order.

[0013] In some embodiments, the rear side member includes a left rear side member and a right rear side member. The left rear side member is connected to the left connecting plate of the rear cross member, and the right rear side member is connected to the right connecting plate of the rear cross member.

[0014] In some embodiments, the left rear crossmember connecting plate is provided in front of the left rear side member, and the right rear crossmember connecting plate is provided in front of the right rear side member. The left rear crossmember connecting plate is connected to both the left section of the rear crossmember body and the first side sill, and the right rear crossmember connecting plate is connected to both the right section of the rear crossmember body and the second side sill.

[0015] In some embodiments, a first boss is provided on the left connecting plate of the rear cross member, and a second boss is provided on the right connecting plate of the rear cross member.

[0016] Both the first boss and the second boss are provided with rear subframe mounting portions, and the first boss and the second boss are located on the rear side of the rear cross member body along the longitudinal direction of the vehicle. The height of the lower surface of the first boss and the lower end surface of the second boss in the vehicle height direction is higher than the height of the lower surface of the rear cross member body.

[0017] In some embodiments, the lower body further includes a rear seat front cross member, which extends along the width direction of the vehicle and is connected to the rear side member, the first side sill, and the second side sill, and the height of the lower surface of the rear seat front cross member in the height direction of the vehicle is greater than the height of the upper surface of the battery pack.

[0018] In some embodiments, both ends of the rear seat front cross member are connected to the left rear side member and the right rear side member, respectively. The rear seat front cross member, the left rear side member, the rear cross member, and the right rear side member are connected along the circumferential direction to form a sealed frame structure.

[0019] In some embodiments, the left rear side member includes a front section of the left rear side member, the front of which is connected to the rear seat front cross member and the rear of which is connected to the rear cross member left connecting plate, and the height of the bottom in the vehicle height direction is greater than the height of the top surface of the battery pack. The right rear side member includes a front section of the right rear side member, the front of which is connected to the rear seat front cross member and the rear of which is connected to the rear cross member right connecting plate, and the height of the bottom in the vehicle height direction is greater than the height of the top surface of the battery pack.

[0020] In some embodiments, the lower body includes a first side sill and a second side sill. The second side sill and the first side sill are arranged opposite each other in the width direction of the body. In the longitudinal direction of the vehicle, the rear end surface of the battery pack extends beyond the rear end surface of the first side sill and the rear end surface of the second side sill.

[0021] In some embodiments, the vehicle further includes a front subframe, which is connected to the lower body. The rear end surface of the front subframe is formed as a stopper surface extending forward of the battery pack.

[0022] In some embodiments, the lower body further includes a front side member, and the rear end bottom surface of the front side member and the top surface of the battery pack are spaced vertically apart to form a sealing gap.

[0023] In some embodiments, the battery pack includes an upper battery pack housing, a lower battery pack housing, and at least one cell. The upper battery pack housing and the lower battery pack housing form a housing space, and at least one cell is provided in the housing space. At least a portion of the upper surface of the upper battery pack housing is formed as the floor of the vehicle body, the cell is fixedly connected to the upper battery pack housing, the top surface of the cell is bonded to the upper battery pack housing, the lower battery pack housing is a cooling plate, and the bottom surface of the cell is bonded to the lower battery pack housing with a thermally conductive adhesive.

[0024] In some embodiments, the battery pack includes a plurality of the cells, the longitudinal direction of the plurality of cells coincides with the longitudinal direction of the vehicle, and the plurality of cells are arranged side by side along the width direction of the vehicle.

[0025] In some embodiments, a sealing plate assembly is provided on the lower vehicle body, and the upper surface of the battery pack is hermetically connected to the sealing plate assembly. The sealing plate assembly includes an annular sealing plate and at least one sealing member. The sealing member is provided between the sealing plate and the battery pack. The sealing plate has a first planar portion, the battery pack has a second planar portion, the first planar portion and the second planar portion face each other, and the sealing member is provided between the first planar portion and the second planar portion. A first side sill is provided on the left side of the lower vehicle body, and a second side sill is provided on the right side of the lower vehicle body. The sealing plate includes a left sealing plate section and a right sealing plate section. The left sealing plate section has a left flange at its left end, and the left sealing plate section is connected to the first side sill by the left flange. The right sealing plate section has a right flange at its right end, and the right sealing plate section is connected to the second side sill by the right flange. The sealing plate further includes a front sealing plate section and a rear sealing plate section. The front sealing plate section is connected to the front side member, and the rear sealing plate section is connected to the rear cross member.

[0026] In some embodiments, a seat cross member extending along the width direction is provided on the lower vehicle body. A battery pack reinforcing beam extending along the width direction is provided on the battery pack, and the battery pack reinforcing beam is connected to the seat cross member.

[0027] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily understood by describing the embodiments with reference to the following drawings.

Brief Description of the Drawings

[0028] [Figure 1] It is a top view of the vehicle body structure according to an embodiment of the present disclosure. [Figure 2] It is a right side view of the front structure of the vehicle body according to an embodiment of the present disclosure. [Figure 3] It is a schematic view of a partial structure of the vehicle body according to an embodiment of the present disclosure. [Figure 4]This is a schematic diagram of the front structure of the vehicle body according to an embodiment of the present disclosure, showing the bottom surface of the front cross member. [Figure 5] This is a bottom view of the front structure of the vehicle body according to an embodiment of the present disclosure. [Figure 6] This is a right side view of the rear structure of a vehicle body according to an embodiment of the present disclosure. [Figure 7] This is a schematic diagram of the rear structure of a vehicle body according to an embodiment of the present disclosure. [Figure 8] This is a cross-sectional view along line AA in Figure 7. [Figure 9] This is a cross-sectional view of a partial structure of a vehicle body according to an embodiment of the present disclosure. [Figure 10] This is a cross-sectional view of a partial structure of a vehicle body according to an embodiment of the present disclosure. [Figure 11] This is an exploded view of a battery pack according to an embodiment of the present disclosure. [Figure 12] This is an exploded view of a partial vehicle body according to an embodiment of the present disclosure. [Figure 13] This is a schematic diagram of a sealing plate assembly according to an embodiment of the present disclosure. [Figure 14] This is a cross-sectional view of the right end of the sealing plate according to an embodiment of the present disclosure. [Figure 15] This is a cross-sectional view of the front sealing plate end according to an embodiment of the present disclosure. [Figure 16] This is a cross-sectional view of a battery pack according to an embodiment of the present disclosure. [Figure 17] This is a schematic diagram of the sealing plate and sheet cross member according to an embodiment of the present disclosure. [Figure 18] This is a schematic diagram of the rear structure of a vehicle body according to an embodiment of the present disclosure. [Modes for carrying out the invention]

[0029] The embodiments of this disclosure will be described in detail below, and the embodiments described with reference to the drawings are illustrative. Vehicle 1 according to an embodiment of this disclosure will be described below with reference to Figures 1 to 18, and vehicle 1 includes a lower body 10, a rear subframe 70, and a battery pack 20. The X direction refers to the longitudinal direction of vehicle 1, i.e., the front-rear direction, the Y direction refers to the width direction of vehicle 1, i.e., the left-right direction, and the Z direction refers to the height direction of vehicle 1, i.e., the up-down direction.

[0030] Specifically, as shown in Figures 7 and 8, the rear subframe 70 is connected to the lower body 10, and the battery pack 20 is connected to the lower body 10 and is also provided on the underside of the lower body 10. The front end surface 701 of the rear subframe 70 is formed as a stopper surface that extends behind the battery pack 20, meaning that the battery pack 20 can extend to the front end surface 701 of the rear subframe 70.

[0031] In conventional technology, the vehicle body floor is the load-bearing structure of the passenger compartment and is sealed and connected to the lower vehicle body. The lower vehicle body and the battery pack are two separately designed components, and the battery pack is generally located below the vehicle body floor and fixedly connected to the vehicle body. Therefore, when the battery pack is installed, a certain assembly gap is formed between the battery pack and the vehicle body structure in the vertical direction of the vehicle, and a certain gap is also formed between the battery pack and the vehicle body floor. This gap increases the height between the roof and the bottom of the battery pack in the vertical direction of the vehicle, which can reduce the vehicle's minimum ground clearance and impair its ability to pass through obstacles, increase the vehicle's height and raise its center of gravity, causing certain handling stability problems, and reduce the height of the passenger compartment, affecting the user experience of the vehicle. In the vehicle 1 of this invention, the upper housing of the battery pack 20 and the vehicle body floor are integrated as a single unit, with the upper housing of the battery pack becoming the floor of the vehicle 1. This eliminates the need for the vehicle body floor as in the prior art, reducing the mounting gap between the vehicle body floor and the battery pack. This effectively improves the vehicle's space utilization rate, effectively increases the vehicle's minimum ground clearance, increases the height of the passenger compartment, improves the passenger experience, and prevents the center of gravity from rising. Furthermore, since the battery pack 20 can transmit force, it can transmit the rear collision force as a force transmission structure when a rear collision occurs to the vehicle 1. When a rear collision occurs to the vehicle 1, the rear subframe 70, after receiving the applied force, contacts the rear end surface 201 of the battery pack 20 in a forward direction, thereby allowing the battery pack 20 to participate in force transmission and transmit the force forward. Thus, the battery pack 20 can withstand the force and distribute it, improving the safety performance of the vehicle 1.

[0032] According to the vehicle 1 of the embodiment of this disclosure, by connecting the battery pack 20 to the lower vehicle body 10 such that at least a portion of the upper surface of the battery pack 20 becomes the floor of the vehicle body, the space utilization rate of the vehicle 1 is improved, the mounting space for the battery pack 20 is expanded, and the capacity of the battery pack 20 is improved. ,carThe height of both sides is reduced, improving the vehicle 1's ability to pass through obstacles. By forming the front end surface 701 of the rear subframe 70 as a stopper surface extending behind the battery pack 20, the mounting space for the battery pack 20 can be expanded rearward, thereby effectively increasing the capacity of the battery pack 20 and reducing the distance between the battery pack 20 and the rear subframe 70. Furthermore, the projection of the battery pack 20 in the longitudinal direction and the projection of the rear subframe 70 in the longitudinal direction overlap at least partially, allowing the battery pack 20 to function as a force transmission structure for the vehicle 1. When the rear of the vehicle 1 is hit, the rear subframe 70 can transmit the impact force to the battery pack 20, thereby improving the safety of the vehicle 1.

[0033] In some embodiments, as shown in Figure 6, the minimum distance between the rear end surface 201 of the battery pack 20 and the front end surface 701 of the rear subframe 70 is L, where L satisfies 10 mm ≤ L ≤ 100 mm. This configuration ensures mounting clearance for the battery pack 20 and effectively increases the mounting space for the battery pack 20, allowing the rear end surface 201 of the battery pack 20 to extend rearward and improving the capacity of the battery pack 20. Furthermore, with this configuration, when the rear of the vehicle 1 is hit, the rear subframe 70 contacts the battery pack 20, allowing the battery pack 20 to transmit the rear impact force forward, thereby improving the safety of the vehicle 1. In addition, interference between the rear end surface 201 of the battery pack 20 and the front surface of the rear subframe 70 can be avoided. Moreover, when installing the battery pack 20, the front end surface 701 of the rear subframe 70 and the battery pack 20 are not directly connected but have a certain gap, making it easy to install the battery pack 20, thereby improving the assembly speed of the vehicle 1.

[0034] In some embodiments, as shown in Figures 1 and 3, the lower body 10 further includes a first side sill 18 and a second side sill 18' that are positioned opposite each other in the width direction of the body. The battery pack 20 is connected to the first side sill 18 and the second side sill 18', thereby forming the first side sill 18 and the second side sill 18' as a battery pack mounting beam.

[0035] In conventional technology, a battery pack mounting beam, independent of the side sills, is provided on the underside of the vehicle's floor, and this battery pack mounting beam is positioned between the two side sills of the vehicle, thereby positioning the battery pack between the two side sills. However, this design limits the extension of the battery pack in the vehicle's width direction, significantly reducing the battery pack's capacity and preventing its effective integration into the vehicle's power transmission path.

[0036] In this invention, the left side of the main body of the battery pack 20 of the vehicle 1 can extend to the right side of the first side sill 18, and the right side of the main body of the battery pack 20 can extend to the left side of the second side sill 18'. By extending the battery pack 20 to both sides in the Y direction and connecting the battery pack mounting portion to the first side sill 18 and the second side sill 18', the storage space for the battery pack 20 is increased, and the capacity of the battery pack 20 is improved. Furthermore, since the vehicle's side sills (first side sill 18 and second side sill 18') are formed as battery pack mounting beams and the battery pack 20 is fixedly connected to the vehicle's side sills (first side sill 18 and second side sill 18'), when the side sills transmit force, the battery pack 20 can effectively participate in force transmission. This increases the force transmission path of the vehicle 1, and by utilizing the advantages of the large volume and area of ​​the battery pack 20, the force per unit area in the force transmission process can be reduced, damage can be reduced, and the safety performance of the vehicle 1 can be improved. In short, by providing the above configuration, the dimensions of the battery pack 20 in the Y direction are increased, the power capacity of the battery pack 20 is increased, and the driving range of the vehicle 1 can be improved. Furthermore, when the vehicle 1 is hit, the battery pack 20 can participate in force transmission, thereby improving the safety performance of the vehicle 1.

[0037] In some embodiments, as shown in Figures 1 and 2, the lower body 10 includes a first side sill 18 and a second side sill 18' that are positioned opposite each other in the width direction of the body. For example, the first side sill 18 is located on the left side in the width direction of the body, and the second side sill 18' is located on the right side in the width direction of the body, and in the longitudinal direction of the vehicle 1, the rear end surface 201 of the battery pack 20 extends beyond the rear end surface of the first side sill 18 and the rear end surface of the second side sill 18'. This configuration effectively increases the length of the battery pack 20, provides sufficient mounting space for the battery pack in the longitudinal direction of the vehicle 1, and thereby effectively improves the capacity of the battery pack 20. Furthermore, by positioning the battery pack 20 as close as possible to the rear subframe 70, the battery pack 20 is more likely to participate in force transmission, improving the safety of the vehicle 1. Naturally, in some other embodiments, the rear end surface 201 of the battery pack 20 may be flush with the rear end surface of the first side sill 18 and the rear end surface of the second side sill 18' in the longitudinal direction of the vehicle 1, and this is not limited here.

[0038] In some embodiments, as shown in Figures 6 and 7, the lower body 10 includes two rear side members 17 spaced apart in the width direction of the body, and the height of the front bottom surface of the rear side members 17 in the vehicle height direction is higher than the height of the top surface of the battery pack 20 in the vehicle height direction. Here, "height" refers to the positional relationship, not the dimensional relationship. The front bottom surface of the rear side member 17 is located above the top surface of the battery pack 20 in the Z direction of the vehicle 1, and above may be diagonally upward or directly upward, and is not limited thereto. This arrangement prevents the front end of the rear side member 17 from obstructing the mounting and rearward extension of the battery pack 20, making it easier to mount the battery pack 20 on the underside of the lower body 10, thereby effectively increasing the battery pack mounting space in the front-rear direction of the vehicle 1, improving the capacity of the battery pack 20, improving the assembly speed of the vehicle 1, and easily realizing high-speed production of the vehicle 1.

[0039] In some embodiments, as shown in Figures 1 and 6, the vehicle 1 further includes a front subframe 30, which is connected to the lower body 10. The rear end surface of the front subframe 30 is formed as a stopper surface that extends forward of the battery pack 20. With this configuration, the battery pack 20 can extend to the rear end surface of the front subframe 30, increasing the extension dimension of the battery pack 20 in the longitudinal direction. Since the battery pack 20 can extend to the front subframe 30, when a front-end collision occurs to the vehicle 1, the battery pack 20 can transmit force as a force transmission structure.

[0040] For example, the rear end surface of the front subframe 30 is formed as a stopper surface that extends forward of the battery pack 20. When the vehicle 1 is running normally, the rear end surface of the front subframe 30 and the front end surface of the battery pack 20 are spaced apart. When a frontal collision occurs with the vehicle 1, the front subframe 30 receives a rearward force and then contacts the front end surface of the battery pack 20. As a result, the battery pack 20 participates in force transmission, and thus the battery pack 20 plays a role in withstanding and distributing the force, thereby improving the safety performance of the vehicle 1. In other words, this configuration increases the dimensions of the battery pack 20 in the X direction, improves space utilization, and increases the capacity of the battery pack 20. At the same time, the battery pack 20 plays a role in distributing the frontal collision force, thereby improving the safety performance of the vehicle 1.

[0041] In some embodiments, as shown in Figure 2, a mounting gap is provided at least between the front end surface of the battery pack 20 and the rear end surface of the front subframe 30. This prevents the distance between the front end surface of the battery pack 20 and the rear end surface of the front subframe 30 from being too large, thereby increasing the extension space of the battery pack 20 in the X direction, expanding the housing space for the battery pack 20, and facilitating the front subframe 30 to contact the battery pack 20 and transmit force, while effectively preventing interference with the vehicle 1 when the battery pack 20 is installed.

[0042] In some embodiments, as shown in Figures 4 and 5, the lower body 10 further includes a front cross member 16 and opposing A-pillars 14, the front cross member 16 being located between two A-pillars 14, and both left and right ends of the front cross member 16 being connected to the two A-pillars 14, respectively. When a collision occurs with the vehicle 1, the front cross member 16 effectively increases the force transmission path of the vehicle 1 by distributing the frontal collision force from the vehicle 1 and transmitting it to the two A-pillars 14, or by transmitting the side collision force from one A-pillar 14 to the other A-pillar 14, thereby reducing the destruction of the vehicle 1 due to the collision and further improving the safety of the vehicle 1. In some embodiments, as shown in Figures 2, 4, and 5, the lower body 10 further includes two front side members 50, and the rear portions of the front side members 50 are connected to the front cross member 16 so that the impact force from the front of the vehicle 1 can be transmitted by the front side members 50 to the front cross member 16, and further transmitted by the front cross member 16 to the A pillar 14 and the center tunnel 40 connected to the front cross member 16. As a result, the impact force from the front is effectively distributed by the front cross member 16, and multiple force transmission paths are formed, thereby reducing damage to the vehicle 1 due to the impact force, improving the structural stability of the vehicle 1, and improving the safety performance of the vehicle 1.

[0043] In some embodiments, as shown in Figures 2 and 4, the lower body 10 further includes a front side member 50, and the rear end bottom surface of the front side member 50 and the top surface of the battery pack 20 are spaced vertically apart to form a sealing gap. The rear end bottom surface of the front side member 50 and the top surface of the battery pack 20 are spaced apart so that a sealing structure can be easily provided between the front side member 50 and the battery pack 20. As the front side member 50 and the battery pack 20 are spaced apart, when the battery pack 20 extends in the direction of the front side member 50, the front side member 50 does not obstruct the battery pack 20, does not interfere with the battery pack 20, and does not hinder the installation of the battery pack 20, thereby effectively increasing the battery pack mounting space in the longitudinal direction of the vehicle 1, further improving the capacity of the battery pack 20, and making the installation of the battery pack 20 easier.

[0044] In some embodiments, as shown in Figures 3 and 4, the front side member 50 is connected to the side sill and the center tunnel 40. The side sill includes a first side sill 18 and a second side sill 18', the first side sill 18 being located on the left side of the vehicle 1, and the second side sill 18' being located on the right side of the vehicle 1, and the center tunnel 40 The front side member 50 may be located between the first side sill 18 and the second side sill 18' of the vehicle 1. When the vehicle 1 is hit, the force acting on it can be transmitted by the front side member 50 to the first side sill 18, the second side sill 18' and the center tunnel 40, thereby effectively forming multiple force transmission paths and improving the force transmission capacity of the vehicle 1.

[0045] In some embodiments, as shown in Figures 3-4 and 6-7, the lower body 10 further includes a rear cross member 11 and two spaced-apart rear side members 17. The rear cross member 11 extends along the width direction of the vehicle 1 and is connected to the rear side members 17 and the side sills (specifically, a first side sill 18 and a second side sill 18'). That is, both ends of the rear cross member 11 are connected to the first side sill 18 and the second side sill 18', respectively, and are connected to the front of the rear side members 17. The height of the lower surface of the rear cross member 11 is higher than the height of the upper surface of the battery pack 20, and the front of the rear side members 17 is located on the side of the rear cross member 11 away from the battery pack 20. This configuration avoids hindering the extension of the battery pack 20 and the expansion of the mounting space for the battery pack 20. Furthermore, when the vehicle 1 is subjected to a collision force, the force received by the rear side member 17 is transmitted entirely to the rear cross member 11, and then further transmitted to the side sill by the rear cross member 11. This increases the force transmission path and improves the force transmission efficiency.

[0046] The rear cross member 11 is also configured to serve as a battery pack mounting beam, meaning that the rear cross member 11 is fixedly connected to the battery pack 20. Therefore, the force received by the rear cross member 11 is transmitted to the battery pack 20 by the connecting components, allowing the battery pack 20 to be incorporated into the force transmission path. Furthermore, the large surface area of ​​the battery pack 20 effectively improves the force transmission effect. As can be understood, the force transmitted from the rear side member 17 to the rear cross member 11 can be transmitted by the rear cross member 11 to the first side sills 18 and second side sills 18' on both sides, while also being transmitted to the battery pack 20 by the rear cross member 11, thereby forming multiple force transmission paths. The battery pack 20 increases the surface area of ​​the force transmission structure, which can effectively reduce damage to the vehicle 1 in the event of a collision.

[0047] In some embodiments, as shown in Figure 7, the rear cross member 11 is formed as a battery pack mounting beam. The rear end of the battery pack 20 can be connected to the rear cross member 11 by a connecting component. The upper surface of the battery pack 20 is also provided with a vertical gap between it and the lower surface of the rear cross member 11 to form a sealing gap. When the battery pack 20 is connected to the rear cross member 11, a sealing member 6001 is provided between the battery pack 20 and the rear cross member 11 to form a seal, effectively preventing foreign matter from entering the passenger compartment. When the battery pack 20 is attached to the rear cross member 11, the housing space in the longitudinal direction of the battery pack 20 can be increased, thereby improving the capacity of the battery pack 20 and improving the driving range of the vehicle 1.

[0048] In some embodiments, as shown in Figures 7 and 8, the rear cross member 11 includes a rear cross member left connecting plate 112, a rear cross member right connecting plate 112', and a rear cross member body 111. The rear cross member left connecting plate 112, the rear cross member body 111, and the rear cross member right connecting plate 112' are connected in sequence. The rear cross member left connecting plate 112 can fit onto at least a portion of the surface of the left end of the rear cross member body 111, and the rear cross member right connecting plate 112' can fit onto at least a portion of the surface of the right end of the rear cross member body 111. With this configuration, the rear cross member left connecting plate 112 and the rear cross member right connecting plate 112' can improve the reliability of the connection between the rear cross member 11 and the rear side member 17, thereby improving the safety of the vehicle 1.

[0049] In some embodiments, as shown in Figures 7 and 8, the rear side member 17 includes a left rear side member 1701 and a right rear side member 1701', where the left rear side member 1701 is connected to the rear cross member left connecting plate 112, and the right rear side member 1701' is connected to the rear cross member right connecting plate 112'. The left rear side member 1701 is connected to the rear cross member left connecting plate 112, which is connected to the left end of the rear cross member body 111, and the right rear side member 1701' is connected to the rear cross member right connecting plate 112', which is connected to the right end of the rear cross member body 111. With this configuration, when the rear end of the vehicle 1 is struck, the rear cross member left connecting plate 112 and the rear cross member right connecting plate 112' transmit the rear impact force forward from the rear end of the vehicle 1 via the rear side member 17, and transmit it to the rear cross member left connecting plate 112, the rear cross member right connecting plate 112' and the rear cross member body 111, guiding the impact force to be transmitted in the width direction of the vehicle 1. This distributes the force received when the vehicle 1 is struck from the rear, thus mitigating the rear impact force and preventing the vehicle 1 from deforming due to the rear impact force. As a result, the load-bearing capacity of the vehicle 1 is improved, and the safety of the vehicle 1 is enhanced.

[0050] In some embodiments, as shown in Figures 7 and 8, the rear cross member left connecting plate 112 is provided in front of the left rear side member 1701, and the rear cross member right connecting plate 112' is provided in front of the right rear side member 1701'. The rear cross member left connecting plate 112 is connected to both the left end of the rear cross member body 111 and the first side sill 18, and the rear cross member right connecting plate 112' is connected to both the right end of the rear cross member body 111 and the second side sill 18'.

[0051] With this configuration, when the rear end of the vehicle 1 is struck, the rear cross member left connecting plate 112 and the rear cross member right connecting plate 112' transmit the rear impact force forward from the rear end of the vehicle 1 via the rear side member 17, and transmit it to the rear cross member left connecting plate 112, the rear cross member right connecting plate 112' and the rear cross member body 111, guiding the impact force to be transmitted in the width direction of the vehicle 1. Furthermore, the connection points between the rear cross member left connecting plate 112 and the first side sill 18, and the connection points between the rear cross member right connecting plate 112' and the second side sill 18' allow the impact force to be transmitted to the first side sill 18 and the second side sill 18', thereby dispersing the force received when the vehicle 1 is struck from the rear, mitigating the rear impact force and improving the load-bearing capacity and safety of the vehicle 1.

[0052] In some embodiments, as shown in Figures 7 and 8, a first boss 1121 is provided on the left connecting plate 112 of the rear cross member, and a second boss 1121' is provided on the right connecting plate 112' of the rear cross member. Both the first boss 1121 and the second boss 1121' are provided with a rear subframe mounting portion P, and the first boss 1121 and the second boss 1121' are provided on the rear side of the rear cross member body 111 along the longitudinal direction of the vehicle 1. The first boss 1121 and the second boss 1121' may protrude from the rear cross member body 111 in the longitudinal direction of the vehicle 1, and the cross-sectional area in the width direction of the protruding portion may gradually decrease.

[0053] In some embodiments of this disclosure, the rear cross member 11 has a rear subframe mounting portion P at its lower end, which is attached to the rear subframe 70, and the rear cross member 11 and the rear subframe 70 are attached and fixed to the rear subframe mounting portion P by bolts. The force transmission structure is fastened to the rear subframe mounting portion P with a buckle, so that the rear side member 17 and the battery pack 20 form a force transmission area Q, which can ensure the effectiveness of rear force transmission and improve the safety of the vehicle 1.

[0054] A first boss 1121 is provided on the left connecting plate 112 of the rear cross member, and a second boss 1121' is provided on the right connecting plate 112' of the rear cross member. Both the first boss 1121 and the second boss 1121' are provided with a rear subframe mounting portion P. The first boss 1121 and the second boss 1121' are provided on the rear side of the rear cross member body 111 along the longitudinal direction of the vehicle 1.

[0055] In some embodiments, as shown in Figures 7 and 8, the height of the lower end surface of the first boss 1121 and the lower end surface of the second boss 1121' in the height direction of the vehicle 1 is higher than the height of the lower end surface of the rear cross member 11. Here, "height" refers to the positional relationship, not the dimensional relationship. By providing them in this manner, the first boss 1121 and the second boss 1121' avoid interference between the rear subframe 70 and the rear side member 17, improve the structural strength of the first boss 1121 and the second boss 1121', improve the reliability of the connection between the first boss 1121 and the second boss 1121' and the rear side member 17, improve the load-bearing capacity of the force transmission region Q, ensure the effectiveness of force transmission at the rear, and improve the safety of the vehicle 1.

[0056] In some embodiments, as shown in Figure 7, the left rear side member 1701 includes the left rear side member front section 17011, the front of which is connected to the rear seat front cross member 12 and the rear of which is connected to the rear cross member left connecting plate 112, and the height of the bottom of the vehicle 1 in the height direction is higher than the height of the top surface of the battery pack 20. The right rear side member 1701' includes the right rear side member front section 17011', the front of which is connected to the rear seat front cross member 12 and the rear of which is connected to the rear cross member right connecting plate 112', and the height of the bottom of the vehicle 1 in the height direction is higher than the height of the top surface of the battery pack 20. Note that "height" here refers to positional relationship, not dimensional relationship. With this configuration, the left rear side member 1701 and the right rear side member 1701' can be positioned above the battery pack 20. This raises the top surface of the battery pack 20, extending it below the bottom of the front section 17011 of the left rear side member and the front section 17011' of the right rear side member. This increases the storage space for the battery pack 20 in the height direction, improving space utilization and passenger space, and reducing the height of the vehicle.

[0057] In some embodiments, as shown in Figures 7 and 6, the lower body 10 further includes a rear seat front cross member 12, which extends along the width direction of the vehicle 1 and is connected to a rear side member 17, a first side sill 18, and a second side sill 18'. The occupant seats of the vehicle 1 may be provided on the rear seat front cross member 12, which extends along the width direction of the vehicle 1. The left end of the rear seat front cross member 12 may be connected to the rear end of the left rear side member 1701 and the first side sill 18, and the right end may be connected to the rear end of the right rear side member 1701' and the second side sill 18'. With this configuration, when the rear of the vehicle 1 is hit, the rear seat front cross member 12 can transmit the rear impact force to the rear seat front cross member 12 via the rear side member 17, thereby mitigating and distributing the rear impact force, improving the load-bearing capacity of the vehicle 1, and enhancing the safety of the vehicle 1.

[0058] Furthermore, when the left or right side of vehicle 1 is hit, the rear seat front cross member 12 can participate in force transmission, thereby mitigating the side impact force, avoiding damage to vehicle 1 due to concentrated force, and improving the safety of vehicle 1.

[0059] In some embodiments, as shown in Figure 7, the height of the lower surface of the rear seat front cross member 12 in the vehicle 1 in the vertical direction is higher than the height of the upper surface of the battery pack 20. Here, "height" refers to the positional relationship, not the dimensional relationship. Because the height of the lower surface of the rear seat front cross member 12 in the Z direction is higher than the height of the upper surface of the battery pack 20, it is possible to avoid the rear seat front cross member 12 obstructing the extension of the battery pack 20 in the Z direction, thereby increasing the dimensions of the battery pack 20 in the Z direction, improving space utilization efficiency, and improving the driving range of the vehicle 1.

[0060] In some embodiments, as shown in Figures 7 and 18, the rear side member 17 includes a left rear side member 1701 and a right rear side member 1701', and both ends of the rear seat front cross member 12 are connected to the left rear side member 1701 and the right rear side member 1701', respectively. The left rear side member 1701 and the right rear side member 1701' extend along the longitudinal direction of the vehicle 1, and both ends of the rear seat front cross member 12 are connected to the left rear side member 1701 and the right rear side member 1701', respectively. When the rear of the vehicle 1 is hit, the rear impact force left The rear side member 1701 and the right rear side member 1701' can transmit the force to the rear seat front cross member 12, thereby mitigating and dispersing the rear collision force, improving the load-bearing capacity of the rear of the vehicle 1, and enhancing the safety of the vehicle 1.

[0061] In some embodiments of this disclosure, the height of the lower surface of the rear seat front cross member 12 in the vehicle height direction is greater than the height of the rear side member 17 at the corresponding connection point.

[0062] In some embodiments of this disclosure, the rear seat front cross member 12, the left rear side member 1701, the rear cross member 11, and the right rear side member 1701' are connected along the circumferential direction to form a sealed frame structure. The rear seat front cross member 12, the left rear side member 1701, the rear cross member 11, and the right rear side member 1701' are connected to each other to form a U-shaped structure, which can significantly improve the force transmission capacity at the rear of the vehicle 1, and since the structure is connected to the first side sill 18 and the second side sill 18', it can effectively increase the force transmission path, disperse and transmit side impact forces, front impact forces, and rear impact forces, improve force transmission capacity, and effectively reduce damage caused by collisions.

[0063] In some embodiments of this disclosure, the lower body 10 includes a first side sill 18 and a second side sill 18' that are opposed to each other in the width direction of the body. In the longitudinal direction of the vehicle, the rear end surface 201 of the battery pack 20 extends beyond the rear end surface of the first side sill 18 and the rear end surface of the second side sill 18'. Rearward in the longitudinal direction of the vehicle, the rear end surface 201 of the battery pack 20 extends beyond the rear end surface of the first side sill 18 and the rear end surface of the second side sill 18'. This configuration effectively increases the capacity of the battery pack and increases the length of the battery pack, thereby improving the driving range of the vehicle.

[0064] In some embodiments, as shown in Figures 9, 10, and 11, the battery pack 20 includes an upper battery pack housing 2011, a lower battery pack housing 2012, and at least one cell 202. The upper battery pack housing 2011 and the lower battery pack housing 2012 form a housing space 2013, and at least one cell 202 is provided in the housing space 2013, with at least a portion of the upper surface of the upper battery pack housing 2011 forming the floor of the vehicle body. To make it clear, in one embodiment of the present invention, the upper battery pack housing 2011 and the floor of the vehicle body are integrated integrally, i.e., the floor of the vehicle body is omitted and the upper battery pack housing 2011 replaces the floor of the vehicle body, which can effectively reduce the number of parts and effectively reduce the weight of the vehicle body, thus improving the driving range of the vehicle to some extent.

[0065] In the Y-direction of vehicle 1, the battery pack 20 is mounted to the vehicle body 10. The mounting portions at both the left and right ends of the upper battery pack housing 2011 are fixedly connected to the first side sill 18 and the second side sill 18', respectively. Specifically, the left extension 20111 of the upper battery pack housing 2011 is fixedly connected to the first side sill 18, and the right extension 20111' of the upper battery pack housing 2011 is fixedly connected to the second side sill 18'. Multiple through holes may be provided in the left extension and the right extension, and multiple through holes may be provided in corresponding parts of the two side sills 18 and 18'. By passing bolts 19 or screws through these through holes and fixing them to the mounting holes, the battery pack 20 can be effectively fixedly connected to the side sills 18 and 18'. Preferably, the multiple through holes in the left and right extensions are spaced apart along the longitudinal direction of the vehicle 1 so that the battery pack 20 is better connected to the vehicle 1.

[0066] The following explanation will use the example that the first side sill 18 is connected to the left extension 20111. The first side sill housing 1801 of the first side sill 18 is provided with mounting holes (not shown) spaced apart along the longitudinal direction of the vehicle 1, and the portion of the left extension 20111 corresponding to the first side sill housing 1801 is provided with extension connection through holes (not shown), and the first side sill 18 and the left extension 20111 are connected by connecting bolts 19. This improves the reliability of the connection of the first side sill 18 and enhances the safety of the vehicle 1.

[0067] In some embodiments, the upper battery pack housing 2011 and the lower battery pack housing 2012 form a housing space 2013 capable of accommodating at least one cell 202, and at least one cell 202 is provided in the housing space 2013. At least a portion of the upper surface of the upper battery pack housing 2011 is formed as the floor of the vehicle body. In one embodiment of the present disclosure, the upper battery pack housing 2011 is a metal housing, which may be made of steel or other metal. Forming a portion of the upper surface of the battery pack 20 as the floor of the vehicle body in this way allows for a better load-bearing structure to be formed, preventing the structural strength of the battery pack 20 from being too low, and better protecting the battery pack 20, thereby better protecting the cell 202, improving the safety and lifespan of the cell 202. By forming at least a portion of the upper surface of the battery pack upper housing 2011 as the vehicle body floor, the gap between the battery pack 20 and the vehicle body is reduced, reducing driving noise and effectively increasing the battery pack mounting space in the vehicle 1. This allows for a larger electrical capacity for the battery pack 20, an increase in the total power of the battery pack 20, and an improvement in the driving range of the vehicle 1. Furthermore, it lowers the vehicle's center of gravity, improves the vehicle's drivability, increases the space in the passenger compartment, and effectively enhances the customer experience. In addition, it saves materials, reduces the total weight of the vehicle 1, and facilitates the lightweight design of the vehicle 1.

[0068] In some embodiments, as shown in Figures 11-12, the cell 202 is fixedly connected to the upper battery pack housing 2011. The top surface of the cell 202 is bonded to the upper battery pack housing 2011, and the lower battery pack housing 2012 may be a cooling plate, with the bottom surface of the cell 202 being bonded to the lower battery pack housing 2012 by a thermally conductive adhesive 204. In this structure, the weight of the battery pack 20 can be effectively reduced and the energy density of the battery pack 20 can be improved by omitting the bottom battery pack housing in the conventional battery pack structure and replacing it with a cooling plate. packBy reducing the height of vehicle 1 in the Z direction, the minimum ground clearance of the vehicle can be improved, providing better passability. Furthermore, by providing a cooling plate on the underside of cell 202, the impact of the battery pack 20's heat management on the passenger compartment can be effectively avoided, thereby improving the riding experience. By bonding the upper side of cell 202 to the upper battery pack housing 2011, cell 202 can be effectively fixed, and the mode and strength of the upper battery pack housing 2011 can be effectively improved, thereby enabling it to support the weight loaded onto the upper battery pack housing 2011 from the passenger compartment and to effectively participate in the transmission of forces in vehicle 1. Specifically, when a side collision occurs with vehicle 1, and the force acting on the side sills 18 and 18' is transmitted to the upper battery pack housing 2011, the cell 202 bonded to the upper battery pack housing 2011 can be effectively utilized to transmit the force. By bonding the lower side of cell 202 to the cooling plate, cell 202 can be effectively secured, and heat transfer between cell 202 and the cooling plate can be improved, thereby improving heat transfer efficiency and thermal management efficiency. The upper housing 2011 of the battery pack is sealed and connected to the lower housing 2012 of the battery pack to prevent foreign matter from entering the inside of the battery pack 20 and affecting the lifespan or safety of the battery pack 20.

[0069] In the battery pack 20 of this invention, by making the upper housing 2011 of the battery pack the floor of the vehicle body, when the battery pack 20 is subjected to a large force, the cells 202 do not detach from the upper housing 2011 of the battery pack, thereby improving the connection stability of the cells 202 and ensuring the safety of the battery pack 20.

[0070] In some embodiments, as shown in Figures 10, 11, and 16, the battery pack 20 may include at least one cell 202, the longitudinal direction of which the cell 202 coincides with the longitudinal direction of the vehicle 1. At least one cell 202 is provided in the housing space 2013 of the battery pack 20, and the longitudinal direction of the cell 202 is set to align with the longitudinal direction of the vehicle 1. With this configuration, the battery pack 20 can improve energy density and effectively utilize the cell 202 to transmit force. When a side collision occurs with the vehicle 1, the larger area of ​​the cell 202 receives the impact force, effectively reducing pressure and preventing structural failure of the cell 202. It can also increase the force transmission area, distributing the force along the longitudinal direction of the vehicle 1 and preventing excessive localized damage.

[0071] As shown in Figures 10 and 11, the battery pack 20 includes a plurality of cells 202, which are arranged side by side along the width direction of the vehicle 1. This arrangement makes it easier for the cells 202 to participate in force transmission during a side collision of the vehicle 1, improves the space utilization rate of the battery pack 20, and makes it easier to increase the number of cells 202 housed in the battery pack 20, thereby increasing the total power capacity of the battery pack 20 and improving the driving range of the vehicle 1.

[0072] In some embodiments, as shown in Figure 12, a sealing plate assembly 60 is provided on the lower body 10, and the upper surface of the battery pack 20 is sealed to the sealing plate assembly 60. The sealing plate assembly 60 is provided on the lower body 10 of the vehicle 1 and seals the connection point between the top surface of the battery pack 20 and at least one of the front side member 50, the frame structure, and the rear cross member 11. The sealing plate assembly 60 is located between the lower body 10 and the battery pack 20, and when provided in this manner, the sealing plate assembly 60 can improve the sealing performance of the vehicle 1.

[0073] In some embodiments, as shown in Figures 9 and 13, the sealing plate assembly 60 includes an annular sealing plate 6001 and at least one sealing member 6002, the sealing member 6002 being provided between the sealing plate 6001 and the battery pack 20. In one embodiment of the present disclosure, the sealing plate assembly 60 is provided on the rear side of the front side member 50, on the front side of the rear cross member 11, and between the two side sills to form an annular shape, and the sealing plate assembly 60 is also provided on the front side member 50 Since it is connected to the rear cross member and the two side sills, it can effectively form a seal with the battery pack 20, thereby completely sealing the passenger compartment with the upper housing 2011 of the battery pack and preventing substances from outside the vehicle from entering the passenger compartment through the gap between the battery pack 20 and the vehicle body. The sealing member 6002 is configured in an annular shape and there may be two or more of them. Two or more sealing members 6002 can be provided between the annular sealing plate 6001 and the battery pack 20 to form a multilayer seal, thereby providing a higher sealing effect. The two or more sealing members are also annular sealing members and are provided in an annular shape, that is, two adjacent sealing members are provided with one on the inside and the other on the outside, and they are spaced apart, thereby improving the sealing effect of the sealing member 6002.

[0074] The sealing plate 6001 may be an annular sealing plate formed as a single unit, or it may be an annular sealing plate formed by connecting a plurality of sub-sealing plates.

[0075] As shown in Figure 9, the sealing plate 6001 has a first planar portion 6001a, and the battery pack 20 has a second planar portion 2014. The first planar portion 6001a and the second planar portion 2014 face each other, and the sealing member 6002 is provided between the first planar portion 6001a and the second planar portion 2014. The first planar portion 6001a is provided to correspond to the second planar portion 2014, and at least one sealing member 6002 is attached between the first planar portion 6001a and the second planar portion 2014, thereby ensuring the sealing effect of the sealing plate 6001 and improving the airtightness of the vehicle 1.

[0076] In some embodiments, the sealing member 6002 is a silicone foam member. Silicone foam members have properties such as being lightweight, deformable, having excellent sound insulation, and having excellent heat insulation. By using a foam member for the sealing member 6002, the sealing member 6002 can block substances such as water and air, improve the sound insulation of the vehicle 1, and improve passenger comfort. The silicone foam member may be compressed to some extent to ensure the sealing effect. In addition, the silicone foam member can improve the heat insulation of the sealing plate 6001 and prevent the temperature of the battery pack 20 from becoming too high and being transferred upward, thereby ensuring the safety and reliability of the battery pack 20 and improving the safety of the vehicle 1. Furthermore, the silicone foam member can improve the effect of sealing heat by blocking heat transfer.

[0077] In some embodiments, as shown in Figures 9, 10, 14, and 15, the lower body 10 is provided with a first side sill 18 on the left side and a second side sill 18' on the right side. The sealing plate 6001 includes a left sealing plate step 6001b and a right sealing plate step 6001b', with a left flange 6001c at the left end of the left sealing plate step 6001b, which is connected to the first side sill 18 by the left flange 6001c, and a right flange 6001c' at the right end of the right sealing plate step 6001b', which is connected to the second side sill 18' by the right flange 6001c'.

[0078] The following description will be based on the example that the first side sill 18 is connected to the left sealing plate step 6001b. A left flange 6001c extending vertically is provided on the left side of the left sealing plate step 6001b. Preferably, the left flange 6001c may be a flange extending upward or a flange extending downward. By fixing the left flange 6001c to the first side sill 18, the left sealing plate 6001b can be effectively fixed to the first side sill 18, ensuring the reliability of the connection between the sealing plate 6001 and the first side sill 18, and effectively improving the airtightness between the sealing plate 6001 and the vehicle 1, thereby ensuring the reliability of the vehicle 1. In addition, the sealing plate 6001 can also prevent fine dust from entering the interior of the vehicle 1, improving the ride comfort of the vehicle 1.

[0079] In some embodiments, as shown in Figures 13 and 15, the sealing plate 6001 further includes a front sealing plate step 6001d and a rear sealing plate step 6001f, where the front sealing plate step 6001d is connected to the front side member 50 and the rear sealing plate step 6001f is connected to the rear cross member 11. The sealing plate 6001 may also include a front sealing plate step 6001d and a rear sealing plate step 6001f, where the front sealing plate step 6001d is provided with a front flange 6001e connected to the front side member 50 and the front sealing plate step 6001d is fixedly connected to the front side member 50 by the front flange 6001e, and the rear sealing plate step 6001f is provided with a rear flange connected to the rear cross member 11 and the rear sealing plate step 6001f is fixedly connected to the rear cross member 11 by the rear flange. Such a connection structure can effectively improve the connection reliability of the sealing plate 6001 and improve the sealing performance.

[0080] To make it easier to understand, the flat surfaces provided on the sealing plate assembly 60 and the battery pack 20 allow for better sealing, and the opposing flat surfaces allow the sealing member 6002 to better seal at opposing positions, thereby improving the sealing effect.

[0081] In some embodiments, as shown in Figures 12, 16, and 17, the lower body 10 is provided with a seat cross member 13 that extends in the left-right direction. The battery pack 20 is provided with a battery pack reinforcing beam 2015 that extends in the width direction, and the battery pack 20 is connected to the seat cross member 13 by the battery pack reinforcing beam 2015.

[0082] The lower body 10 may be provided with a seat cross member 13 extending in the left-right direction, and the seat is preferably provided above the seat cross member 13. The battery pack 20 may be provided with a battery pack reinforcing beam 2015 extending in the width direction in the portion corresponding to the seat cross member 13, and the battery pack 20 is connected to the seat cross member 13 by the battery pack reinforcing beam 2015. The seat cross member 13 is connected to the battery pack 2 0 This improves the reliability of the connection between the lower body 10 and the battery pack 20. Furthermore, when the vehicle 1 is subjected to a side impact force, the battery pack reinforcing beam 2015 transmits the side impact force along the width direction of the vehicle 1, thereby ensuring the reliability of the vehicle 1 and the battery pack 20.

[0083] Furthermore, in the description of this disclosure, the orientations or positional relationships indicated by terms such as "center," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "top," "bottom," "inside," "outside," "axial direction," "radial direction," and "circumferential direction" are based on the orientations or positional relationships shown in the drawings and are merely for the purpose of easily explaining and simplifying this disclosure. They do not indicate or suggest that the shown device or component has a specific orientation or must be configured and operate in a specific orientation, and should not be understood as limiting this disclosure.

[0084] In the descriptions of this disclosure, “first feature” and “second feature” may include one or more such features. In the descriptions of this disclosure, “multiple” means two or more. In the descriptions of this disclosure, the presence of the first feature “above” or “below” the second feature may include the first feature and the second feature being in direct contact, or they may not be in direct contact but are in contact through other features between them. In the descriptions of this disclosure, the presence of the first feature “above,” “above,” or “on the top surface” of the second feature may include the first feature being directly above and diagonally above the second feature, or it may simply mean that the horizontal height of the first feature is greater than that of the second feature.

[0085] In this specification, any reference to the terms “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, configurations, materials, or properties described in conjunction with such embodiment or example are included in at least one embodiment or example of this disclosure. In this specification, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example.

[0086] While embodiments of this disclosure have been shown and described, those skilled in the art will understand that various modifications, amendments, substitutions, and variations can be made to these embodiments without departing from the principles and objectives of this disclosure, and that the scope of this disclosure is limited by the claims and their equivalents. [Explanation of Symbols]

[0087] 1 vehicle 10 Lower body 11 Rear cross member 111 Rear cross member body 112 Rear cross member left connecting plate 1121 First Boss 112' Rear cross member right connecting plate 1121' Second Boss 12 Rear seat front cross member 13 Seat cross member 14 A-pillar 15 Rear seat frame 16 Front Cross Member 17 Rear side member 1701 Left rear side member 17011 Front of left rear side member 1701' Right rear side member 17011' Right rear side member front section 18. First side sill 18' Second side sill 19 connecting bolts 20 battery packs 201 Rear end surface 2011 Battery pack upper housing 20111 Left extension 20111' Right extension 2012 Battery pack lower housing 2013 Containment Space 2014 2nd plane part 2015 Battery Pack Reinforcement Beam 202 cells 203 Structural Adhesives 204 Thermally conductive adhesive 30 Front Subframe 40 Center Tunnel 50 Front Side Member 60 Sealing plate assembly 6001 Sealing plate 6001a 1st plane part 6001b Left seal plate stage 6001b' Right seal plate stage 6001c Left flange 6001c' Right flange 6001d Front seal plate stage 6001e Front Flange 6001f Rear seal plate stage 6002 Sealing member, 70 Rear subframe 701 Front end surface Q Force transmission region P Rear subframe mounting area

Claims

1. It includes a lower body (10), a rear subframe (70), and a battery pack (20), The rear subframe (70) is connected to the lower body (10), The battery pack (20) is connected to the lower body (10) and is provided on the lower side of the lower body (10). The front end surface (701) of the rear subframe (70) is formed as a stopper surface extending behind the battery pack (20), and at least a portion of the upper surface of the battery pack (20) is formed as the floor of the vehicle body. The aforementioned lower body (10) is Further including a first side sill (18) and a second side sill (18'), The second side sill (18') and the first side sill (18) are provided facing each other in the width direction of the vehicle body, and the battery pack (20) is connected to the first side sill (18) and the second side sill (18'), so that the first side sill (18) and the second side sill (18') are formed as a battery pack mounting beam. The lower body (10) is provided with a seat cross member (13) that extends along the width direction. The battery pack (20) is provided with a battery pack reinforcing beam (2015) that extends along the width direction, and the battery pack reinforcing beam (2015) is connected to the sheet cross member (13). A vehicle characterized by (1).

2. The vehicle (1) according to claim 1, characterized in that the minimum distance between the rear end surface (201) of the battery pack (20) and the front end surface (701) of the rear subframe (70) is L, and L satisfies the condition 10 mm ≤ L ≤ 100 mm.

3. The aforementioned lower body (10) is The vehicle (1) according to claim 1, further comprising two rear side members (17), the two rear side members (17) being spaced apart in the width direction of the vehicle body, and the height of the front bottom surface of the rear side members (17) in the height direction of the vehicle (1) being higher than the height of the top surface of the battery pack (20) in the height direction of the vehicle (1).

4. The lower body (10) further includes a rear cross member (11), The vehicle (1) according to claim 3, characterized in that the rear cross member (11) extends along the width direction of the vehicle (1) and is connected to the rear side member (17), the first side sill (18), and the second side sill (18').

5. The vehicle (1) according to claim 4, characterized in that the rear cross member (11) is formed as a battery pack mounting beam, and the lower surface of the rear cross member (11) and the top surface of the battery pack (20) are spaced apart in the vertical direction to form a sealing gap.

6. The aforementioned rear cross member (11) is Rear cross member left connecting plate (112) and, Rear cross member right connecting plate (112') and, Including the rear cross member body (111), The vehicle (1) according to claim 5, characterized in that the rear cross member left connecting plate (112), the rear cross member body (111), and the rear cross member right connecting plate (112') are connected in order.

7. The aforementioned rear side member (17) is It includes a left rear side member (1701) and a right rear side member (1701'), wherein the left rear side member (1701) is connected to the rear cross member left connecting plate (112), The vehicle (1) according to claim 6, characterized in that the right rear side member (1701') is connected to the right rear cross member connecting plate (112').

8. The rear cross member left connecting plate (112) is provided in front of the left rear side member (1701), and the rear cross member right connecting plate (112') is provided in front of the right rear side member (1701'), The rear cross member left connecting plate (112) is connected to both the left section of the rear cross member body (111) and the first side sill (18). The vehicle (1) according to claim 7, characterized in that the rear cross member right connecting plate (112') is connected to both the right section of the rear cross member body (111) and the second side sill (18').

9. A first boss (1121) is provided on the left connecting plate (112) of the rear cross member, and a second boss (1121') is provided on the right connecting plate (112') of the rear cross member. The first boss (1121) and the second boss (1121') are both provided with a rear subframe mounting portion (P), and the first boss (1121) and the second boss (1121') are provided on the rear side of the rear cross member body (111) along the longitudinal direction of the vehicle (1). The vehicle (1) according to claim 7, characterized in that the height in the height direction of the vehicle (1) is greater than the height of the lower surface of the first boss (1121) and the lower end surface of the second boss (1121')

10. The vehicle (1) according to claim 9, wherein the lower body (10) further includes a rear seat front cross member (12), the rear seat front cross member (12) extends along the width direction of the vehicle (1) and is connected to the rear side member (17), the first side sill (18) and the second side sill (18'), and the height of the lower surface of the rear seat front cross member (12) in the height direction of the vehicle (1) is greater than the height of the upper surface of the battery pack (20).

11. Both ends of the rear seat front cross member (12) are connected to the left rear side member (1701) and the right rear side member (1701'), respectively. The vehicle (1) according to claim 10, characterized in that the rear seat front cross member (12), the left rear side member (1701), the rear cross member (11), and the right rear side member (1701') are connected along the circumferential direction to form a sealed frame structure.

12. The left rear side member (1701) includes a left rear side member front section (17011), the front of which is connected to the rear seat front cross member (12), and the rear of which is connected to the rear cross member left connecting plate (112), and the height of the bottom of the left rear side member front section (17011) in the height direction of the vehicle (1) is higher than the height of the top surface of the battery pack (20). The vehicle (1) according to claim 10, wherein the right rear side member (1701') includes a front right rear side member (17011'), the front of which the front right rear side member (17011') is connected to the rear seat front cross member (12), the rear of which is connected to the rear cross member right connecting plate (112'), and the height of the bottom of the front right rear side member (17011') in the height direction of the vehicle (1) is higher than the height of the top surface of the battery pack (20).

13. The aforementioned lower body (10) is Including a first side sill (18) and a second side sill (18'), The second side sill (18') and the first side sill (18) are provided facing each other in the width direction of the vehicle body. The vehicle (1) according to claim 1, characterized in that, in the longitudinal direction of the vehicle (1), the rear end surface (201) of the battery pack (20) extends beyond the rear end surface of the first side sill (18) and the rear end surface of the second side sill (18').

14. It further includes a front subframe (30), the front subframe (30) being connected to the lower body (10), The vehicle (1) according to claim 1, characterized in that the rear end surface of the front subframe (30) is formed as a stopper surface extending forward of the battery pack (20).

15. The lower body (10) further includes a front side member (50), and the bottom surface of the rear end of the front side member (50) and the top surface of the battery pack (20) are spaced vertically apart to form a sealing gap, or, The vehicle (1) according to claim 4, wherein the lower body (10) further includes a front cross member (16), a front side member (50), and an A-pillar provided opposite to it, the ends of the front cross member (16) are connected to the A-pillar, and the front side member (50) is connected to the front cross member (16).

16. The aforementioned battery pack (20) is Battery pack upper housing (2011), Lower battery pack housing (2012), Includes at least one cell (202), The vehicle (1) according to claim 1, characterized in that the upper battery pack housing (2011) and the lower battery pack housing (2012) form a housing space (2013), at least one cell (202) is provided in the housing space (2013), at least a portion of the upper surface of the upper battery pack housing (2011) is formed as the floor of the vehicle body, the cell (202) is fixedly connected to the upper battery pack housing (2011), the top surface of the cell (202) is bonded to the upper battery pack housing (2011), the lower battery pack housing (2012) is a cooling plate, and the bottom surface of the cell (202) is bonded to the lower battery pack housing (2012) by a thermally conductive adhesive (204).

17. The vehicle (1) according to claim 16, wherein the battery pack (20) includes a plurality of cells (202), the longitudinal direction of the plurality of cells (202) coincides with the longitudinal direction of the vehicle (1), and the plurality of cells (202) are arranged side by side along the width direction of the vehicle (1).

18. A sealing plate assembly (60) is provided on the lower body (10), and the upper surface of the battery pack (20) is sealed and connected to the sealing plate assembly (60). The sealing plate assembly (60) is Annular sealing plate (6001), The system includes at least one sealing member (6002), wherein the sealing member (6002) is provided between the sealing plate (6001) and the battery pack (20). The sealing plate (6001) has a first flat portion (6001a), the battery pack (20) has a second flat portion (2014), the first flat portion (6001a) and the second flat portion (2014) face each other, the sealing member (6002) is provided between the first flat portion (6001a) and the second flat portion (2014), a first side sill (18) is provided on the left side of the lower body (10), and a second side sill (18') is provided on the right side of the lower body (10). The sealing plate (6001) includes a left sealing plate step (6001b) and a right sealing plate step (6001b'), the left sealing plate step (6001b) has a left flange (6001c) at its left end, the left sealing plate step (6001b) is connected to the first side sill (18) by the left flange (6001c), the right sealing plate step (6001b') has a right flange (6001c') at its right end, and the right sealing plate step (6001b') is, The vehicle (1) according to 15, characterized in that the right flange (6001c') connects to the second side sill (18'), the sealing plate (6001) further includes a front sealing plate step (6001d) and a rear sealing plate step (6001f), the front sealing plate step (6001d) is connected to the front side member (16), and the rear sealing plate step (6001f) is connected to the rear cross member (11).

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