Vehicle

Abstract

The application discloses a vehicle, which comprises a lower vehicle body and a battery pack, wherein the battery pack is connected with the lower vehicle body and arranged on the lower side of the lower vehicle body; at least part of the upper surface of the battery pack is formed as a vehicle floor; the lower vehicle body further comprises a rear cross beam which is formed as a battery pack mounting beam; and the lower surface of the rear cross beam is spaced apart from the top surface of the battery pack in the vertical direction to form a sealing gap. According to the vehicle, the at least part of the upper surface of the battery pack can be used as the vehicle floor by connecting the battery pack with the lower vehicle body, so that the space utilization of the vehicle is improved, the capacity of the battery pack is increased, the space utilization of the vehicle is improved, and the overall height of the vehicle is reduced, thereby improving the passing performance of the vehicle. In addition, the lower surface of the rear cross beam is spaced apart from the top surface of the battery pack in the vertical direction to form a sealing gap, so that the capacity of the battery pack is increased, thereby increasing the endurance of the vehicle.

Description

[0001] This case is a divisional application of application number 202210346551.8, application date March 31, 2022, and invention title "Vehicle". Technical Field

[0002] This invention relates to the field of vehicles, and more particularly to a vehicle. Background Technology

[0003] With the annual increase in car ownership, energy and environmental issues have become more prominent, making the promotion of new energy vehicles a major way to solve these problems. In existing new energy vehicles, battery pack mounting beams are typically installed under the vehicle floor for battery pack installation. To ensure vehicle safety, the lower body structure limits the available space for the battery pack, thus reducing its capacity and shortening the vehicle's range. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a vehicle that has high space utilization and increases the capacity of the battery pack.

[0005] According to an embodiment of the present invention, a vehicle includes: a lower body; a battery pack connected to the lower body and disposed on the lower side of the lower body; wherein at least a portion of the upper surface of the battery pack is formed as a vehicle floor; the lower body further includes a rear crossbeam, the rear crossbeam being formed as a battery pack mounting beam; wherein the lower surface of the rear crossbeam and the top surface of the battery pack are vertically spaced to form a sealing gap.

[0006] According to embodiments of the present invention, by forming at least a portion of the upper surface of the battery pack as the vehicle floor, the vehicle's Z-axis space can be improved, thereby increasing space utilization and passenger space. Furthermore, by vertically spacing the lower surface of the rear crossbeam from the top surface of the battery pack to form a sealed gap, the entry of foreign objects into the passenger compartment can be effectively prevented. Mounting the battery pack on the rear crossbeam expands the battery pack's accommodating space along its length, thereby increasing the battery pack's capacity and the vehicle's range.

[0007] In some embodiments, a seal is provided between the battery pack and the rear crossbeam to form a seal.

[0008] In some embodiments, the rear crossbeam includes a left connecting plate, a right connecting plate, and a body, which are connected sequentially.

[0009] In some embodiments, the left connecting plate of the rear crossbeam is provided with a first boss, and the right connecting plate of the rear crossbeam is provided with a second boss; wherein, both the first boss and the second boss are provided with a rear subframe mounting point, and the first boss and the second boss are located on the rear side of the rear crossbeam body along the length direction of the vehicle.

[0010] In some embodiments, the lower side surface of the first boss and the lower end surface of the second boss are at a higher height in the vehicle height direction than the lower side surface of the rear crossbeam body is at a higher height in the vehicle height direction.

[0011] In some embodiments, a rear subframe is further included, the rear subframe being connected to the lower body; and a rear subframe mounting point is provided below the rear crossbeam for mounting to the rear subframe.

[0012] In some embodiments, the lower vehicle body further includes two rear longitudinal beams spaced apart in the vehicle width direction; a force transmission structure is fastened at the mounting point of the rear subframe so that the rear longitudinal beams and the battery pack form a force transmission area.

[0013] In some embodiments, the rear crossbeam extends along the width direction of the vehicle and is connected to the rear longitudinal beam and the sill beam.

[0014] In some embodiments, the front section of the rear longitudinal beam is disposed on the side of the rear crossbeam away from the battery pack.

[0015] In some embodiments, the battery pack includes: an upper battery pack housing; a lower battery pack housing; at least one battery cell; the upper battery pack housing and the lower battery pack housing form a receiving space, and at least one battery cell is disposed in the receiving space; wherein at least a portion of the upper surface of the upper battery pack housing is formed as a vehicle floor.

[0016] In some embodiments, the lower vehicle body is provided with a sealing plate assembly, and the upper surface of the battery pack is sealed to the sealing plate assembly.

[0017] In some embodiments, the sealing plate assembly includes: an annular sealing plate; and at least one seal disposed between the sealing plate and the battery pack.

[0018] In some embodiments, the seal is constructed as an annular ring, and there are at least two seals, one of two adjacent seals being disposed on the inner side and the other of two adjacent seals being disposed on the outer side, and the two seals being spaced apart. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a top view of the vehicle body structure according to an embodiment of the present invention;

[0021] Figure 2 This is a right view of the front structure of the vehicle body according to an embodiment of the present invention;

[0022] Figure 3 This is a structural schematic diagram of the vehicle body structure according to an embodiment of the present invention;

[0023] Figure 4 This is a structural schematic diagram of the front structure of the vehicle body according to an embodiment of the present invention, wherein the bottom surface of the front crossbeam is shown in the figure;

[0024] Figure 5 This is a bottom view of the front structure of the vehicle body according to an embodiment of the present invention;

[0025] Figure 6 This is a right view of the rear structure of the vehicle body according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the rear structure of the vehicle body according to an embodiment of the present invention;

[0027] Figure 8 It is based on Figure 7 A sectional view at point AA;

[0028] Figure 9 This is a cross-sectional view of the vehicle body structure according to an embodiment of the present invention;

[0029] Figure 10 This is a cross-sectional view of the vehicle body structure according to an embodiment of the present invention;

[0030] Figure 11 This is an exploded view of a battery pack according to an embodiment of the present invention;

[0031] Figure 12 This is an exploded view of a portion of the vehicle body according to an embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of the structure of the sealing plate assembly according to an embodiment of the present invention;

[0033] Figure 14 This is a cross-sectional view of the right sealing plate end according to an embodiment of the present invention;

[0034] Figure 15 This is a cross-sectional view of the front sealing plate end according to an embodiment of the present invention;

[0035] Figure 16 This is a cross-sectional view of a battery pack according to an embodiment of the present invention;

[0036] Figure 17This is a structural schematic diagram of the sealing plate and seat crossbeam according to an embodiment of the present invention;

[0037] Figure 18 This is a schematic diagram of the rear structure of the vehicle body according to an embodiment of the present invention.

[0038] Figure label:

[0039] Vehicle 1;

[0040] Lower body 10; Rear crossbeam 11; Rear crossbeam body 111; Rear crossbeam left connecting plate 112; First boss 1121; Rear crossbeam right connecting plate 112'; Second boss 1121'; Rear seat front crossbeam 12; Seat crossbeam 13; A-pillar 14; Rear seat frame 15; Front crossbeam 16; Rear longitudinal beam 17; Left rear longitudinal beam 1701; Front section of left rear longitudinal beam 17011; Right rear longitudinal beam 1701'; Front section of right rear longitudinal beam 17011'; First sill beam 18; Second sill beam 18'; Connecting bolt 19;

[0041] Battery pack 20; upper housing of battery pack 2011; left extension 20111; right extension 20111'; lower housing of battery pack 2012; accommodating space 2013; second flat portion 2014; battery pack reinforcing beam 2015; battery cell 202; structural adhesive 203; thermally conductive adhesive 204;

[0042] Front subframe 30; central tunnel 40; front longitudinal beam 50;

[0043] Sealing plate assembly 60; sealing plate 6001; first flat portion 6001a; left sealing plate segment 6001b; right sealing plate segment 6001b'; left flange 6001c; right flange 6001c'; front sealing plate segment 6001d; front folded edge 6001e; rear sealing plate segment 6001f; sealing element 6002;

[0044] Rear subframe 70;

[0045] Force transmission zone Q; Rear subframe mounting point P. Detailed Implementation

[0046] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-18 The vehicle 1 described according to an embodiment of the present invention includes a lower body 10, a rear subframe 70, and a battery pack 20. Herein, the X direction refers to the length direction of the vehicle 1, i.e., the front-to-back direction; the Y direction refers to the width direction of the vehicle 1, i.e., the left-to-right direction; and the Z direction refers to the height direction of the vehicle 1, i.e., the vertical direction.

[0047] Specifically, such as Figures 7-8As shown, the rear subframe 70 is connected to the lower body 10, and the battery pack 20 is connected to the lower body 10 and disposed on the lower side of the lower body 10. The front end face of the rear subframe 70 is formed as a limiting surface for the rearward extension of the battery pack 20, that is, the battery pack 20 can extend to the front end face of the rear subframe 70.

[0048] In existing technologies, the vehicle floor serves as the load-bearing structure of the passenger compartment and is sealed to the lower body. The lower body and battery pack are two separately designed components. The battery pack is typically located below the vehicle floor and fixedly connected to the vehicle body. Therefore, during installation, a certain assembly gap is left between the battery pack and the vehicle body structure in the vertical direction. This results in a gap between the battery pack and the vehicle floor. This gap increases the height between the roof and the bottom of the battery pack in the vertical direction, reducing the vehicle's ground clearance and thus improving its passability. Alternatively, it may increase the vehicle's height, raising the center of gravity and causing handling instability issues. Conversely, it may lower the passenger compartment height, affecting the user experience. The vehicle 1 of this application integrates the upper housing of the battery pack 20 and the vehicle floor into one unit, using the upper housing 2011 of the battery pack as the floor of the vehicle 1. This eliminates the need for a separate vehicle floor as in the prior art, thereby reducing the installation gap between the vehicle floor and the battery pack. This effectively improves the vehicle's space utilization, thereby increasing the ground clearance, increasing the passenger compartment height, improving passenger experience, or preventing a rise in the center of gravity. Simultaneously, the battery pack 20 can transmit force. In the event of a rear-end collision with the vehicle 1, the battery pack 20 can act as a force-transmitting structure to transfer the rear impact force. When the rear of the vehicle 1 is involved in a collision, the rear subframe 70, after being subjected to force, will contact the rear end face of the battery pack 20 forward, allowing the battery pack 20 to participate in force transmission and forward transfer of force. Therefore, the battery pack 20 can resist and disperse the transmitted force, thereby improving the safety performance of the vehicle 1.

[0049] like Figure 7 As shown, the lower vehicle body 10 also includes a rear crossbeam 11, which serves as a battery pack mounting beam. The lower surface of the rear crossbeam 11 and the top surface of the battery pack 20 are vertically spaced to form a sealing gap. Therefore, when the battery pack 20 and the rear crossbeam 11 are connected, a seal 6001 can be provided between them to form a seal, effectively preventing foreign objects from entering the passenger compartment. The battery pack 20 is mounted on the rear crossbeam 11, which expands the length of the battery pack 20, thereby increasing its capacity and the vehicle 1's range.

[0050] According to an embodiment of the present invention, in the vehicle 1, by connecting the battery pack 20 to the lower body, at least a portion of the upper surface of the battery pack 20 can serve as the vehicle floor, thereby improving the space utilization of the vehicle 1, increasing the capacity of the battery pack 20, improving the space utilization of the vehicle 1, reducing the overall vehicle height, or improving the passability of the vehicle 1. By forming the front end face of the rear subframe 70 as a limiting surface for the rearward extension of the battery pack 20, the installation space of the battery pack 20 can be extended rearward, thereby effectively increasing the capacity of the battery pack 20. At the same time, the distance between the battery pack 20 and the rear subframe 70 is reduced, and the projections of the battery pack 20 and the rear subframe 70 in the front-rear direction at least partially overlap, making it possible for the battery pack 20 to serve as a force transmission structure for the vehicle 1. When the rear of the vehicle 1 is involved in a collision, the rear subframe 70 can transfer the collision force to the battery pack 20, thereby improving the safety of the vehicle 1. Furthermore, by setting the lower surface of the rear crossbeam 11 and the top surface of the battery pack 20 at vertical intervals to form a sealed gap, foreign objects can be effectively prevented from entering the passenger compartment. The battery pack 20 is mounted on the rear crossbeam 11, which expands the length of the battery pack 20, thereby increasing its capacity and the vehicle 1's range.

[0051] In some embodiments, such as Figure 6 As shown, the minimum distance between the rear end face of the battery pack 20 and the front end face of the rear subframe 70 is L, where L satisfies: 10mm ≤ L ≤ 100mm. By setting the minimum distance between the rear end face of the battery pack 20 and the front end face of the rear subframe 70 to L, the installation space of the battery pack 20 can be effectively increased while ensuring the installation clearance of the battery pack 20. This allows the rear end face of the battery pack 20 to extend rearward, increasing the capacity of the battery pack 20. Simultaneously, when the rear of the vehicle 1 is involved in a collision, the rear subframe 70 contacts the battery pack 20, allowing the rear impact force to be transmitted forward through the battery pack 20, improving the safety of the vehicle 1. Furthermore, interference between the rear end face of the battery pack 20 and the front surface of the rear subframe 70 can be avoided. Additionally, during installation, the front surface of the rear subframe 70 and the battery pack 20 are not directly connected and maintain a certain gap, facilitating the installation of the battery pack 20 and thus increasing the assembly speed of the vehicle 1.

[0052] In some embodiments, such as Figure 1 and Figure 3 As shown, the lower body 10 also includes a first sill beam 18 and a second sill beam 18' arranged opposite to each other in the width direction of the body. The battery pack 20 is connected to the first sill beam 18 and the second sill beam 18' so that the first sill beam 18 and the second sill beam 18' form a battery pack mounting beam.

[0053] In the prior art, a battery pack mounting beam, independent of the sill beam, is provided under the floor of the vehicle. This battery pack mounting beam is located between the two sill beams of the vehicle so that the battery pack can be mounted between the two sill beams. However, this design restricts the extension of the battery pack in the width direction of the vehicle, greatly reduces the capacity of the battery pack, and the battery pack cannot be effectively integrated into the force transmission path of the vehicle.

[0054] The left side surface of the main body of the battery pack 20 of the vehicle 1 of this application can extend to the right side of the first sill beam 18, and the right side surface of the main body of the battery pack 20 can extend to the left side of the second sill beam 18'. By extending the battery pack 20 to both sides in the Y direction and connecting the battery pack mounting part with the first sill beam 18 and the second sill beam 18', the space for accommodating the battery pack 20 is increased, thereby further increasing the capacity of the battery pack 20. Simultaneously, since the vehicle sill beam serves as the battery pack mounting beam, and the battery pack 20 is fixedly connected to the vehicle sill beam, the battery pack 20 can effectively participate in force transmission when the sill beam transmits force. This increases the force transmission path of the vehicle 1 and also utilizes the advantages of the large volume and large area of ​​the battery pack 20 to reduce the force per unit area during force transmission, reducing damage and improving the safety performance of the vehicle 1. This configuration increases the size of the battery pack 20 in the Y direction, increases the battery pack 20's capacity, and improves the driving range of the vehicle 1. Furthermore, when the vehicle 1 is involved in a collision, the battery pack 20 can participate in force transmission, further improving the safety performance of the vehicle 1.

[0055] In some embodiments, such as Figure 2 As shown, the lower vehicle body 10 includes a first sill beam 18 and a second sill beam 18' disposed opposite each other in the vehicle width direction. For example, the first sill beam 18 is located on the left side in the vehicle width direction, and the second sill beam 18' is located on the right side in the vehicle width direction. The rear end face of the battery pack 20 extends beyond the rear end faces of the first sill beam 18 and the second sill beam 18' in the length direction of the vehicle 1. This arrangement allows the battery pack 20 to be effectively lengthened, providing sufficient battery pack installation space in the length direction of the vehicle 1, thereby effectively increasing the capacity of the battery pack 20. At the same time, it allows the battery pack 20 to be positioned as close as possible to the rear subframe 70, facilitating the battery pack 20's participation in force transmission and improving the safety of the vehicle 1. Of course, in other embodiments, the rear end face of the battery pack 20 may also be flush with the rear end faces of the first sill beam 18 and the second sill beam 18' in the length direction of the vehicle 1, which is not a limitation here.

[0056] In some embodiments, such as Figure 7As shown, the lower body 10 includes two rear longitudinal beams 17 spaced apart in the width direction of the vehicle body. The height of the front bottom surface of the rear longitudinal beam 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. It should be noted that "height" here refers to the positional relationship, not the dimensional relationship. The front bottom surface of the rear longitudinal beam 17 is located above the upper surface of the battery pack 20 in the Z direction of the vehicle 1. Here, "above" can be diagonally above or directly above, without limitation. This avoids the front end of the rear longitudinal beam 17 obstructing the installation and rearward extension of the battery pack 20, making it easier for the battery pack 20 to be installed in the lower body 10. This effectively increases the battery pack installation space in the front-rear direction of the vehicle 1, thereby increasing the capacity of the battery pack 20, thus increasing the assembly speed of the vehicle 1 and facilitating high-speed production of the vehicle 1.

[0057] In some embodiments, such as Figure 1 and Figure 6 As shown, vehicle 1 also includes a front subframe 30, which is connected to the lower body 10. The rear end face of the front subframe 30 forms a limiting surface for the forward extension of the battery pack 20. This configuration of the front subframe 30 allows the battery pack 20 to extend to the rear end face of the front subframe 30, increasing the longitudinal extension dimension of the battery pack 20. Simultaneously, by extending the battery pack 20 to the front subframe 30, the battery pack 20 can simultaneously function as a force-transmitting structure in the event of a frontal collision with vehicle 1.

[0058] For example, the rear end face of the front subframe 30 is formed as a limiting surface for the forward extension of the battery pack 20. When the vehicle 1 is driving normally, the rear end face of the front subframe 30 and the front end face of the battery pack 20 are spaced apart. When the front of the vehicle 1 is involved in a collision, the front subframe 30 will come into contact with the front end face of the battery pack 20 after being subjected to a rearward force, so that the battery pack 20 can participate in force transmission. Therefore, the battery pack 20 can play a role in resisting and dispersing force transmission to improve the safety performance of the vehicle 1.

[0059] On the one hand, the X-axis dimension of the battery pack 20 can be increased, improving space utilization and increasing the capacity of the battery pack 20; on the other hand, the battery pack 20 can disperse the frontal impact force, thereby improving the safety performance of the vehicle 1.

[0060] In some embodiments, such as Figure 2 As shown, at least a partial installation gap is provided between the front end face of the battery pack 20 and the rear end face of the front subframe 30. This arrangement of the front end face of the battery pack 20 prevents the distance between the front end face of the battery pack 20 and the rear surface of the front subframe 30 from being too large, thus increasing the space for accommodating the battery pack 20 in the X direction. It also facilitates contact and force transmission between the front subframe 30 and the battery pack 20, and effectively prevents interference between the battery pack 20 and the vehicle 1 during installation.

[0061] In some embodiments, such as Figure 4 and Figure 5 As shown, the lower body 10 also includes a front crossbeam 16 and opposing A-pillars 14. The front crossbeam 16 is positioned between the two A-pillars, and its left and right ends are connected to the two A-pillars respectively. When the vehicle 1 collides, the front crossbeam 16 can disperse and transfer the forward impact force from the vehicle 1 to the two A-pillars, or transfer the side impact force from one A-pillar to the other, thereby effectively increasing the force transmission path of the vehicle 1, reducing the damage to the vehicle 1 from the collision, and thus improving the safety of the vehicle 1. In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the lower body 10 also includes a front longitudinal beam 50. The front longitudinal beam 50 may include two front longitudinal beams 50 arranged opposite each other, and the rear section of the front longitudinal beam 50 is connected to the front cross beam 16 so that the collision force from the front of the vehicle 1 can be transmitted to the front cross beam 16 through the front longitudinal beam 50, and then transmitted to the A-pillar and the central channel 40 connected to the front cross beam 16 through the front cross beam 16. This allows the collision force from the front to be effectively dispersed through the front cross beam 16, forming multiple force transmission paths, thereby reducing the damage to the vehicle 1 caused by the collision force, thereby strengthening the structural stability of the vehicle 1 and further improving the safety performance of the vehicle 1.

[0062] In some embodiments, such as Figure 2 , Figure 4 As shown, the lower vehicle body 10 also includes a front longitudinal beam 50. The rear bottom surface of the front longitudinal beam 50 and the top surface of the battery pack 20 are vertically spaced to form a sealing gap. The spaced arrangement between the rear bottom surface of the front longitudinal beam 50 and the top surface of the battery pack 20 facilitates the installation of a sealing structure between the front longitudinal beam 50 and the battery pack 20. Furthermore, because the front longitudinal beam 50 and the battery pack 20 are spaced apart, the front longitudinal beam 50 does not obstruct the battery pack 20 when it extends towards it. This prevents interference between the front longitudinal beam 50 and the battery pack 20, avoiding any obstruction to the installation of the battery pack 20. This effectively increases the battery pack installation space in the vehicle 1 in the longitudinal direction, thereby increasing the capacity of the battery pack 20 and facilitating its installation.

[0063] In some embodiments, reference Figure 3 and combined Figure 4The front longitudinal beam 50 is connected to the sill beam and the central passage 40. The sill beam includes a first sill beam 18 and a second sill beam 18', wherein the first sill beam 18 is located on the left side of the vehicle 1, and the second sill beam 18' is located on the right side of the vehicle 1. The central passage 400 can be located between the two sill beams of the vehicle 1. This arrangement allows the force to be transmitted through the front longitudinal beam to the sill beam and the central passage when the vehicle is involved in a collision, thereby effectively forming multiple force transmission paths and improving the vehicle's force transmission capability.

[0064] In some embodiments, reference Figure 4 and combined Figure 7 The lower body 10 also includes a rear crossbeam 11 and two spaced-apart rear longitudinal beams 17. The rear crossbeam 11 extends along the width direction of the vehicle 1 and connects with the rear longitudinal beams 17 and the sill beams. That is, both ends of the rear crossbeam 11 are connected to the sill beams, and the rear crossbeam 11 is connected to the front section of the rear longitudinal beams 17. The lower surface of the rear crossbeam 11 is higher than the upper surface of the battery pack 20. The front section of the rear longitudinal beams 17 is located on the side of the rear crossbeam 11 away from the battery pack 20. This avoids obstructing the extension of the battery pack 20 and expands the installation space of the battery pack 20. At the same time, when the vehicle 1 is subjected to a collision force, the force on the rear longitudinal beams 17 can be transmitted to the rear crossbeam 11, and then to the sill beams through the rear crossbeam 11, thereby increasing the force transmission path and improving the force transmission efficiency.

[0065] Furthermore, the rear crossbeam 11 is also configured as a battery pack mounting beam, that is, the rear crossbeam 11 and the battery pack 20 are fixedly connected. Therefore, the force on the rear crossbeam 11 can be transmitted to the battery pack 20 through the connector, thereby incorporating the battery pack 20 into the force transmission path. Relying on the large area characteristics of the battery pack 20, the force transmission effect can be effectively enhanced. It can be understood that the force transmitted from the rear longitudinal beam 17 to the rear crossbeam 11 can be transmitted to the door sill beams on both sides through the rear crossbeam 11, and can also be transmitted to the battery pack 20 through the rear crossbeam 11, thus forming multiple force transmission paths. Moreover, the area of ​​the force transmission structure is increased by the battery pack 20, thereby effectively reducing collision damage.

[0066] In some embodiments, such as Figure 7 As shown, the rear crossbeam 11 serves as a battery pack mounting beam. The rear end of the battery pack 20 can be connected to the rear crossbeam 11 via a connector. Furthermore, the upper surface of the battery pack 20 and the lower surface of the rear crossbeam 11 can be vertically spaced to form a sealed gap. When the battery pack 20 and the rear crossbeam 11 are connected, a sealant 6001 can be provided between the battery pack 20 and the rear crossbeam 11 to form a seal, effectively preventing foreign objects from entering the passenger compartment. The battery pack 20 is mounted on the rear crossbeam 11, which expands the length of the battery pack 20, thereby increasing its capacity and the vehicle 1's range.

[0067] In some embodiments, such as Figure 7 , Figure 8 As shown, the rear crossbeam 11 includes a left connecting plate 112, a right connecting plate 112', and a body 111, which are connected sequentially. The left connecting plate 112 can be adapted to at least a portion of the surface of the left section of the body 111, and the right connecting plate 112' can be adapted to at least a portion of the surface of the right section of the body 111. This arrangement of the left and right connecting plates improves the connection reliability between the rear crossbeam 11 and the rear longitudinal beam 17, thus enhancing the safety of the vehicle 1.

[0068] In some embodiments, such as Figure 7 , Figure 8 As shown, the rear longitudinal beam 17 includes a left rear longitudinal beam 1701 and a right rear longitudinal beam 1701'. The left rear longitudinal beam 1701 is connected to the left connecting plate 112 of the rear cross beam, and the right rear longitudinal beam 1701' is connected to the right connecting plate 112' of the rear cross beam. The left rear longitudinal beam 1701 is connected to the left connecting plate 112 of the rear crossbeam. The left connecting plate 112 of the rear crossbeam is connected to the left section of the rear crossbeam body 111. The right rear longitudinal beam 1701' is connected to the right connecting plate 112' of the rear crossbeam. The right connecting plate 112' of the rear crossbeam is connected to the right end of the rear crossbeam body 111. The rear connecting plate 112' and the rear connecting plate 112' of the rear crossbeam are configured in this way so that when the rear end of the vehicle 1 is hit by a collision, the rear impact force can be transmitted forward from the rear end of the vehicle 1 through the rear longitudinal beam 17, and then transmitted to the rear connecting plate 112' and the rear connecting plate 112' of the rear crossbeam and the rear crossbeam body 111 to guide the impact force to be transmitted in the width direction of the vehicle 1. This can disperse the force that the vehicle 1 receives when it is hit by a collision at the rear, thereby mitigating the rear impact force, preventing the vehicle 1 from deforming after being hit by the rear impact force, thereby improving the load-bearing capacity of the vehicle 1 and further improving the safety of the vehicle 1.

[0069] In some embodiments, such as Figure 7 , Figure 8 As shown, the left connecting plate 112 of the rear crossbeam is located at the front section of the left rear longitudinal beam 1701, and the right connecting plate 112' of the rear crossbeam is located at the front section of the right rear longitudinal beam 1701'; the left connecting plate 112 of the rear crossbeam is connected to the left section of the rear crossbeam body 111 and the first sill beam 901 respectively; the right connecting plate of the rear crossbeam is connected to the right end of the rear crossbeam body 111 and the second sill beam 18' respectively.

[0070] The rear crossbeam left connecting plate 112 and rear crossbeam right connecting plate 112' are configured in this way so that when the rear end of vehicle 1 is hit by a collision, the rear impact force can be transmitted forward from the rear end of vehicle 1 through the rear longitudinal beam 17, and then transmitted to the rear crossbeam left connecting plate 112 and rear crossbeam right connecting plate 112' and the rear crossbeam guides the impact force to be transmitted in the width direction of vehicle 1. The impact force is also guided to the first sill beam 18 and the second sill beam 18' through the connection between the rear crossbeam left connecting plate 112 and rear crossbeam right connecting plate 112' and the first sill beam 18'. This configuration can further disperse the force on the rear side of vehicle 1 when it is hit by a collision, thereby further mitigating the rear impact force and improving the load-bearing capacity and safety of vehicle 1.

[0071] In some embodiments, such as Figure 7 , Figure 8 As shown, the left connecting plate 112 of the rear crossbeam is provided with a first boss 1121, and the right connecting plate 112' of the rear crossbeam is provided with a second boss 1121'. Both the first boss 1121 and the second boss 1121' are provided with a rear subframe mounting point P, and the first boss 1121 and the second boss 1121' are located on the rear side of the rear crossbeam body 111 along the length direction of the vehicle 1. The first boss 1121 and the second boss 1121' can protrude from the rear crossbeam body 111 in the length direction of the vehicle 1, and the cross-sectional area of ​​the protruding portion in the width direction can gradually decrease.

[0072] In some embodiments of this disclosure, the rear crossbeam 11 has a rear subframe mounting point P below it for mounting to the rear subframe 70. The rear crossbeam 11 and the rear subframe 70 are fixed at the rear subframe mounting point P by bolts. A force transmission structure is fastened at the rear subframe mounting point P so that the rear longitudinal beam 17 and the battery pack 20 form a force transmission area Q, which can ensure the effectiveness of rear force transmission and further improve the safety of the vehicle 1.

[0073] The left connecting plate 112 of the rear crossbeam is provided with a first boss 1121, and the right connecting plate 112' of the rear crossbeam is provided with a second boss 1121'. The first boss 1121 and the second boss 1121' are both provided with a rear subframe mounting point, and the first boss 1121 and the second boss 1121' are located on the rear side of the rear crossbeam body 111 along the length direction of the vehicle 1.

[0074] In some embodiments, such as Figure 7 , Figure 8As shown, the lower side of the first boss 1121 and the lower end face of the second boss 1121' are at a higher height in the vehicle 1 height direction than the lower side of the rear crossbeam 11 in the vehicle 1 height direction. It should be noted that "height" here refers to positional relationship, not dimensional relationship. This arrangement of the first boss 1121 and the second boss 1121' avoids interference between the rear subframe 70 and the rear longitudinal beam 17, while also improving the structural strength of the first boss 1121 and the second boss 1121', enhancing the connection reliability between the first boss 1121 and the second boss 1121' and the rear longitudinal beam 17, improving the force transmission capacity of the force transmission area Q, ensuring the effectiveness of rear force transmission, and further improving the safety of the vehicle 1.

[0075] In some embodiments, such as Figure 7 As shown, the left rear longitudinal beam 1701 includes a front section 17011, the front part of which is connected to the front crossbeam 12 of the rear seat, and the rear part of which is connected to the left connecting plate 112 of the rear crossbeam. The bottom of the front section 17011 is higher than the height of the upper surface of the battery pack 20 in the vehicle height direction. The right rear longitudinal beam 1701' includes a front section 17011', the front part of which is connected to the front crossbeam 12 of the rear seat, and the rear part of which is connected to the right connecting plate 112' of the rear crossbeam. The bottom of the front section 17011' is higher than the height of the upper surface of the battery pack 20 in the vehicle height direction. It should be noted that "height" here refers to positional relationship, not dimensional relationship.

[0076] This allows the left rear longitudinal beam 1701 and the right rear longitudinal beam 1701' to be positioned above the battery pack 20, thereby extending the upper surface of the battery pack 20 to below the bottom of the front section 17011 of the left rear longitudinal beam and the bottom of the front section 17011' of the right rear longitudinal beam. This increases the vertical space of the battery pack 20, improves space utilization and passenger space, and reduces the overall vehicle height.

[0077] In some embodiments, such as Figure 7As shown, the lower body 10 also includes a rear seat front crossbeam 12, which extends along the width direction of the vehicle 1 and connects to the rear longitudinal beam 17 and the sill beam. The passenger seat of the vehicle 1 can be mounted on the rear seat front crossbeam 12, which extends along the width direction of the vehicle 1. The left end of the rear seat front crossbeam 12 can connect to the rear end of the left rear longitudinal beam 1701 and the first sill beam 18, and the right end of the rear seat front crossbeam 12 can connect to the rear end of the right rear longitudinal beam 1701' and the second sill beam 18'. This arrangement of the rear seat front crossbeam 12 allows the rear impact force to be transmitted through the rear longitudinal beam 17 to the rear seat front crossbeam 12 during a collision, thus mitigating and dispersing the rear impact force, improving the load-bearing capacity of the vehicle 1, and enhancing the safety of the vehicle 1.

[0078] In addition, when the left or right side of vehicle 1 is impacted, the front crossbeam 12 of the rear seat can participate in force transmission, thereby mitigating the effect of side impact force, avoiding damage to vehicle 1 caused by concentrated force, and improving the safety of vehicle 100.

[0079] In some embodiments, such as Figure 7 As shown, the lower surface of the rear seat front crossbeam 12 is higher in the height direction of vehicle 1 than the upper surface of the battery pack 20 is in the same direction. It should be noted that "height" here refers to positional relationship, not dimensional relationship. The lower surface of the rear seat front crossbeam 12 is higher in the Z-direction than the upper surface of the battery pack 20. This avoids the rear seat front crossbeam 12 obstructing the extension of the battery pack 20 in the Z-direction, thereby increasing the Z-direction dimension of the battery pack 20, improving space utilization, and further enhancing the driving range of vehicle 1.

[0080] In some embodiments, such as Figure 7 and Figure 18 As shown, the rear longitudinal beam 17 includes a left rear longitudinal beam 1701 and a right rear longitudinal beam 1701', and the two ends of the rear seat front crossbeam 12 are connected to the left rear longitudinal beam 1701 and the right rear longitudinal beam 1701', respectively. The left rear longitudinal beam 1701 and the right rear longitudinal beam 1701' extend along the length of the vehicle 1, and the two ends of the rear seat front crossbeam 12 can be connected to the left rear longitudinal beam 1701 and the right rear longitudinal beam 1701', respectively. When the rear of the vehicle 1 is involved in a collision, the rear impact force can be transmitted to the rear seat front crossbeam 12 through the rear longitudinal beam 1701 and the right rear longitudinal beam 1701', thereby mitigating and dispersing the effect of the rear impact force, improving the rear impact resistance of the vehicle 1, and enhancing the safety of the vehicle 1.

[0081] In some embodiments of this disclosure, the lower surface of the front crossbeam of the rear seat is at a height higher than the height of the rear longitudinal beam at the corresponding connection point in the vehicle height direction.

[0082] In some embodiments of this disclosure, the front crossbeam, left rear longitudinal beam, rear crossbeam, and right rear longitudinal beam of the rear seat are connected circumferentially to form a closed frame structure. The front crossbeam, left rear longitudinal beam, rear crossbeam, and right rear longitudinal beam of the rear seat are interconnected to form a U-shaped structure. This structure can greatly improve the force transmission capacity of the rear of the vehicle. Moreover, this structure is also connected to the sill beam, thus effectively increasing the force transmission path while dispersing and transmitting side impact, front impact, and rear impact forces. This not only improves the force transmission capacity but also effectively reduces collision damage.

[0083] In some embodiments of this disclosure, the lower vehicle body includes a first sill beam and a second sill beam disposed opposite to each other in the vehicle width direction; wherein, the rear end face of the battery pack extends beyond the rear end faces of the first sill beam and the second sill beam in the vehicle length direction. The rear end face of the battery pack extending rearward beyond the rear end faces of the first sill beam and the second sill beam in the vehicle length direction can effectively increase the battery pack capacity and length, thereby increasing the vehicle's range.

[0084] In some embodiments, such as Figure 9 , Figure 10 and Figure 11 As shown, the battery pack 20 includes an upper battery pack housing 2011, a lower battery pack housing 2012, and at least one battery cell 202. The upper battery pack housing 2011 and the lower battery pack housing 2012 form a receiving space 2013. At least one battery cell 202 is disposed in the receiving space 2013. At least a portion of the upper surface of the upper battery pack housing 2011 forms a vehicle floor. It can be understood that in one embodiment of this application, the upper battery pack housing 2011 and the vehicle floor are integrated into one piece, that is, the vehicle floor is omitted and replaced by the upper battery pack housing 2011, which can effectively reduce the number of parts and effectively reduce the vehicle weight, thereby improving the vehicle range to a certain extent.

[0085] In the Y direction of vehicle 1, the mounting portions on the left and right sides of the battery pack upper housing 2011 are fixedly connected to the sill beams, so that the battery pack can be mounted on the vehicle body. Specifically, the left extension 20111 of the battery pack upper housing 2011 is fixedly connected to the first sill beam 18, and the right extension 20111' is fixedly connected to the second sill beam 18'. Multiple through holes can be provided on the left and right extensions, and multiple through holes are provided at corresponding positions on the two sill beams. Bolts 19 or screws can be passed through the through holes to be fixedly connected to the mounting holes, so that the battery pack and the sill beams can be effectively fixedly connected. Optionally, the multiple through holes on the left and right extensions are spaced apart along the length direction of the vehicle, so that the battery pack can be better connected to the vehicle.

[0086] The following description uses the connection of the first sill beam 18 to the left extension 20111 as an example. The first sill housing 1801 of the first sill beam 18 is provided with mounting holes (not shown) spaced apart along the length of the vehicle. The left extension 20111 is provided with an extension connection through hole (not shown) at a position corresponding to the first sill housing 1801. The first sill beam 18 and the left extension 20111 are connected by connecting bolts 19. This improves the connection reliability of the first sill beam 18 and enhances the safety of the vehicle 1.

[0087] In some embodiments, a receiving space 2013 is formed between the upper battery pack housing 2011 and the lower battery pack housing 2012 to accommodate at least one battery cell 202, wherein the at least one battery cell 202 is disposed in the receiving space; wherein at least a portion of the upper surface of the upper battery pack housing 2011 is formed as a vehicle floor. In one embodiment of this disclosure, the upper battery pack housing 2011 is a metal housing, preferably steel or other metal housing, so that when a portion of the upper surface of the battery pack 20 is formed as a vehicle floor, it can be better formed as a load-bearing structure to prevent the structural strength of the battery pack 20 from being too low, and it can also better protect the battery pack 20, thereby better protecting the battery cell 202 and improving the safety and service life of the battery cell 202. By forming at least a portion of the upper surface of the upper battery pack housing 2011 as a vehicle floor. Reducing the gap between the battery pack 20 and the vehicle body not only reduces driving noise but also effectively increases the battery pack installation space in vehicle 1, allowing the battery pack 20 to have a larger capacity and increasing its total charge, thus further improving the driving range of vehicle 1. Alternatively, it can lower the vehicle's center of gravity, improving vehicle handling, or increase the passenger compartment space, effectively enhancing the customer experience. Simultaneously, it can save materials, reduce the overall weight of vehicle 1, and facilitate lightweight design of vehicle 1.

[0088] In some embodiments, such as Figure 11-12As shown, the battery cell 202 is fixedly connected to the upper housing 2011 of the battery pack. Furthermore, the top surface of the battery cell 202 is bonded to the upper housing 2011 of the battery pack. The lower housing 2012 of the battery pack can be a cooling plate. The bottom surface of the battery cell 202 is bonded to the base plate via thermally conductive adhesive 204. This structure eliminates the traditional bottom housing of the battery pack, replacing it with a cooling plate. This effectively reduces the weight of the battery pack 20 and increases its energy density. Furthermore, it reduces the height of the battery 20 in the Z-direction of the vehicle 1, increasing the vehicle's ground clearance and improving passability. Moreover, placing the cooling plate below the battery cell 202 effectively avoids the impact of the battery pack 20's thermal management on the passenger compartment, thereby improving... Passenger experience: The upper side of the battery cell 202 is bonded to the upper casing 2011 of the battery pack, effectively fixing the battery cell 202 and enhancing the modal structure and strength of the upper casing 2011. This allows it to bear the weight of the passenger compartment loaded on the upper casing 2011 and effectively participate in the force transmission of the vehicle 1. Specifically, when the vehicle 1 experiences a side collision, the force transmitted from the sill beam to the upper casing 2011 can be effectively transmitted using the battery cell 202 bonded to it. The lower side of the battery cell 202 is bonded to the cooling plate, effectively fixing the battery cell 202 while improving heat transfer between the battery cell 202 and the cooling plate, thus improving heat transfer efficiency and thermal management efficiency. Furthermore, the upper casing 2011 and the lower casing 2012 of the battery pack are sealed together to prevent external substances from entering the battery pack 20, thereby affecting its lifespan or safety.

[0089] The battery pack 20 in this application uses the upper shell as the vehicle floor, so that the battery cells 202 will not detach from the upper shell when the battery pack 20 is subjected to large forces, which can improve the connection stability of the battery cells 202 and ensure the safety of the battery pack 20.

[0090] In some embodiments, such as Figure 10 , Figure 11 and 16 As shown, the battery pack 20 may include at least one battery cell 202, the length direction of which is consistent with the length direction of the vehicle 1. At least one battery cell 202 is disposed within the housing space 2013 of the battery pack 20, with its length direction aligned with the length direction of the vehicle 1. This configuration of the battery pack 20 not only improves energy density but also effectively utilizes the battery cells 202 for force transmission. In the event of a side impact, a larger portion of the battery cell 202 receives the impact force, thereby effectively reducing pressure and further preventing structural damage to the battery cell 202. Furthermore, it increases the force transmission area, distributing the force along the length direction of the vehicle 1 and preventing excessive localized damage.

[0091] Furthermore, such as Figure 10 and Figure 11 As shown, the battery pack 20 includes multiple battery cells 202, which are arranged side-by-side along the width of the vehicle 1. This arrangement of the battery pack 20 facilitates the participation of the battery cells 202 in force transmission during a side collision of the vehicle 1, while also improving the space utilization of the battery pack 20 and increasing the number of battery cells 202 that the battery pack 20 can accommodate, thereby increasing the total capacity of the battery pack 20 and further improving the driving range of the vehicle 1.

[0092] In some embodiments, such as Figure 12 As shown, the lower body 10 is provided with a sealing plate assembly 60, and the upper surface of the battery pack 20 is sealed to the sealing plate assembly 60. The sealing plate assembly 60 is disposed on the lower body 10 of the vehicle 1, sealing the connection between the top surface of the battery pack 20 and at least one of the front longitudinal beam 50, the frame structure, and the rear cross beam 11. Furthermore, the sealing plate assembly is located between the lower body 10 and the battery pack 20, thus improving the sealing performance of the vehicle 1.

[0093] In some embodiments, reference Figure 9 and combined Figure 13 The sealing plate assembly 60 includes an annular sealing plate 6001 and at least one sealing element 6002, which is disposed between the sealing plate 6001 and the battery pack 20. In one embodiment of this disclosure, the sealing plate assembly 60 is disposed between the rear side of the front longitudinal beam 50, the front side of the rear cross beam 11, and the two sill beams to form an annular shape. The sealing plate assembly 60 is also connected to the front longitudinal beam 17, the rear cross beam, and the two sill beams, thereby effectively forming a seal with the battery pack 20. This allows the passenger compartment to be completely sealed by the battery pack upper housing 2011, preventing external substances from entering the passenger compartment through the gap between the battery pack 20 and the vehicle body. The seal 6002 can be constructed as an annular shape and there can be two or more seals 6002. Two or more seals 6002 are disposed between the annular sealing plate and the battery pack to form a multi-layer seal, thereby improving the sealing effect. Furthermore, the two or more seals are also annular seals and are arranged in an annular shape, that is, two adjacent seals are disposed on the inner side and the other on the outer side, and are spaced apart, further improving the sealing effect of the seal 6002.

[0094] The sealing plate 6001 can be a one-piece molded annular sealing plate, or it can be an annular sealing plate formed by connecting multiple sub-sealing plates.

[0095] Furthermore, such as Figure 9As shown, the sealing plate 6001 has a first flat portion 6001a, and the battery pack 20 has a second flat portion 2014. The first flat portion 6001a and the second flat portion 2014 are opposite to each other, and a sealing member 6002 is disposed between the first flat portion 6001a and the second flat portion 2014. The first flat portion 6001a and the second flat portion 2014 are correspondingly disposed, and at least one sealing member 6002 is affixed between the first flat portion 6001a and the second flat portion 2014, thereby ensuring the sealing effect of the sealing plate 6001 and improving the sealing performance of the vehicle 100.

[0096] In some embodiments, the seal 6002 is a silicone foam component. Silicone foam components are lightweight, deformable, and offer good sound insulation and heat insulation. By using a foam component for the seal 6002, it can isolate water, air, and other substances, while simultaneously improving the sound insulation of the vehicle 1 and further enhancing passenger comfort. The silicone foam component can have a certain amount of sealing compression to further ensure the sealing effect. Furthermore, it can improve the heat insulation of the sealing plate 6001, preventing excessive heat transfer from the battery pack 20 upwards, thereby ensuring the safety and reliability of the battery pack 20 and further improving the safety of the vehicle 1. In addition, the silicone foam component can prevent heat transfer, thereby improving the thermal sealing effect of the silicone foam component.

[0097] In some embodiments, such as Figure 9 , Figure 10 , Figure 14 and Figure 15 As shown, a first sill beam 18 is provided on the left side of the lower body 10, and a second sill beam 18' is provided on the right side of the lower body 10; the sealing plate 6001 includes a left sealing plate segment 6001b and a right sealing plate segment 6001b', the left end of the left sealing plate segment 6001b has a left flange 6001c, the left sealing plate segment 6001b is connected to the first sill beam 18 through the left flange 6001c, the right end of the right sealing plate segment 6001b' has a right flange 6001c', the right sealing plate segment 6001b' is connected to the second sill beam 18' through the right flange 6001c'.

[0098] The left sealing plate segment 6001b is connected to the first sill beam 18 via the left flange 6001c, and the right sealing plate segment 6001b' is connected to the second sill beam 18' via the right flange 6001c'.

[0099] The following explanation uses the connection between the first sill beam 18 and the left sealing plate segment 6001b as an example. The left sealing plate segment 6001b has a left flange 6001c extending vertically on its left side. Optionally, the flange can extend upwards or downwards. The left flange 6001c is fixedly connected to the first sill beam 18, allowing the left sealing plate 6001b to be effectively fixed to the sill beam. This ensures the reliability of the connection between the sealing plate 6001 and the first sill beam 18, while also effectively improving the sealing performance between the sealing plate and the vehicle 1, thus guaranteeing the reliability of the vehicle 1. Furthermore, the sealing plate 6001 can prevent the entry of fine dust, improving the comfort of the vehicle 1.

[0100] In some embodiments, such as Figure 13 and Figure 15 As shown, the sealing plate 6001 also includes a front sealing plate segment 6001d and a rear sealing plate segment 6001f. The front sealing plate segment 6001d is connected to the front longitudinal beam 50, and the rear sealing plate segment 6001f is connected to the rear cross beam 11. The sealing plate 6001 may include a front sealing plate segment 6001d and a rear sealing plate segment 6001f. The front sealing plate segment 6001d is provided with a front folded edge 6001e that connects to the front longitudinal beam 50, and is fixedly connected to the front longitudinal beam 50 via the front folded edge. The rear sealing plate segment 6001f is provided with a rear folded edge that connects to the rear cross beam 11, and is fixedly connected to the rear cross beam 11 via the rear folded edge. This connection structure can effectively improve the reliability of the sealing plate connection while also improving the sealing performance.

[0101] It is understandable that the flat portion provided on the sealing plate assembly 60 and the flat portion provided on the battery pack 20 enable better sealing. The corresponding flat portion allows the sealing element 6002 to achieve better sealing at the corresponding position, thereby improving the sealing effect.

[0102] In some embodiments, reference Figure 12 , Figure 16 and combined Figure 17 The lower body 10 is provided with a seat crossbeam 13 extending in the left and right direction; the battery pack 20 is provided with a battery pack reinforcing beam 2015 extending in the width direction, and the battery pack 20 is connected to the seat crossbeam 13 through the battery pack reinforcing beam 2015.

[0103] The lower body 10 may be provided with a seat crossbeam 13 extending in the left and right direction. The seat is suitable to be set on the upper side of the seat crossbeam 13. The battery pack 20 may be provided with a battery pack reinforcing beam 2015 extending in the width direction at a position corresponding to the seat crossbeam 13. The battery pack 20 is connected to the seat crossbeam 13 through the battery pack reinforcing beam 2015. The seat crossbeam 13 can make the connection between the battery pack 2 and the lower body 1 more reliable. At the same time, when the vehicle is subjected to a side impact force, the side impact force can be transmitted along the width direction of the vehicle through the battery pack reinforcing beam 2015, so as to ensure the reliability of the vehicle and the battery pack.

[0104] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0105] In the description of this invention, "first feature" and "second feature" may include one or more of the features. In the description of this invention, "a plurality of" means two or more. In the description of this invention, "above" or "below" the second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them. In the description of this invention, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0106] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0107] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vehicle, characterized in that, The vehicles include: Lower part of the vehicle body; A battery pack, which is connected to the lower body and disposed on the lower side of the lower body. The rear subframe is connected to the lower vehicle body. The projections of the battery pack and the rear subframe in the front-rear direction at least partially overlap. 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: 10mm≤L≤100mm. When the rear of the vehicle is impacted, the rear subframe contacts the battery pack, allowing the rear impact force to be transmitted forward through the battery pack. Wherein, at least a portion of the upper surface of the battery pack is formed as the vehicle floor; The lower vehicle body also includes a rear crossbeam, which is formed as a battery pack mounting beam; wherein, the lower surface of the rear crossbeam and the top surface of the battery pack are spaced apart in the vertical direction to form a sealing gap.

2. The vehicle according to claim 1, characterized in that, A seal is provided between the battery pack and the rear crossbeam to form a seal.

3. The vehicle according to claim 2, characterized in that, The rear crossbeam includes a left connecting plate, a right connecting plate, and a body, which are connected sequentially.

4. The vehicle according to claim 3, characterized in that, The left connecting plate of the rear crossbeam is provided with a first boss, and the right connecting plate of the rear crossbeam is provided with a second boss. The first and second protrusions are each provided with a rear subframe mounting point, and the first and second protrusions are located on the rear side of the rear crossbeam body along the length of the vehicle.

5. The vehicle according to claim 4, characterized in that, The lower side of the first boss and the lower end face of the second boss are at a higher height in the vehicle height direction than the lower side of the rear crossbeam body in the vehicle height direction.

6. The vehicle according to claim 3, characterized in that, The rear crossbeam has a rear subframe mounting point below it for mounting to the rear subframe.

7. The vehicle according to claim 6, characterized in that, The lower vehicle body also includes two rear longitudinal beams spaced apart in the width direction of the vehicle body; a force transmission structure is fastened at the mounting point of the rear subframe so that the rear longitudinal beams and the battery pack form a force transmission area.

8. The vehicle according to claim 7, characterized in that, The rear crossbeam extends along the width of the vehicle and connects to the rear longitudinal beam and the sill beam.

9. The vehicle according to claim 8, characterized in that, The front section of the rear longitudinal beam is located on the side of the rear cross beam away from the battery pack.

10. The vehicle according to any one of claims 1-9, characterized in that, The battery pack includes: Battery pack upper casing; Battery pack lower casing; At least one battery cell; The upper shell of the battery pack and the lower shell of the battery pack form a receiving space, and at least one of the battery cells is disposed in the receiving space; At least a portion of the upper surface of the battery pack housing forms the vehicle floor.

11. The vehicle according to claim 10, characterized in that, The lower body is provided with a sealing plate assembly, and the upper surface of the battery pack is sealed to the sealing plate assembly.

12. The vehicle according to claim 11, characterized in that, The sealing plate assembly includes: Annular sealing plate; At least one seal is disposed between the sealing plate and the battery pack.

13. The vehicle according to claim 12, characterized in that, The seal is constructed in a ring shape, and there are at least two seals, one of the two adjacent seals is located on the inner side, and the other of the two adjacent seals is located on the outer side, and the two seals are spaced apart.

Images