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 priority to a Chinese patent application bearing application number 202210346551.8 and entitled "Vehicle" filed with the State Intellectual Property Office of the People's Republic of China on March 31, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of vehicles, and more particularly to vehicles. [Background technology]

[0003] In the related art, in the conventional new energy vehicle, a battery pack mounting side member is generally provided under the floor of the vehicle body to mount the battery pack, but due to the structure of the lower body, the space available for the battery pack is small, and a large gap is formed between the battery pack and the floor of the vehicle body, which not only affects the driving range of the vehicle, but also affects the passability of the vehicle. Summary of the Invention

[0004] The present disclosure seeks to solve at least one of the technical problems in the prior art, and therefore provides a vehicle with high space utilization and excellent safety performance.

[0005] A vehicle according to an embodiment of the present disclosure includes a lower body, a rear subframe, and a battery pack, the rear subframe being connected to the lower body, the battery pack being connected to the lower body and provided on an underside of the lower body, a front end surface of the rear subframe being formed as a stopper surface extending rearward of the battery pack, and an upper surface of at least a portion of the battery pack being formed as a floor of the vehicle body.

[0006] According to the vehicle of the embodiment of the present disclosure, by forming the front end surface of the rear subframe as a stopper surface extending rearward of the battery pack, the dimension of the battery pack in the front-rear direction can be increased and the space utilization rate can be improved, 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 part of the upper surface of the battery pack as the floor of the vehicle body, the space in the vertical direction of the vehicle can be increased, improving the space utilization rate and the passenger space.

[0007] In some embodiments, a minimum distance between a rear end surface of the battery pack and the front end surface of the rear subframe is L, and L satisfies 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 being disposed opposite each other in a width direction of the vehicle body, and the battery pack being connected to the first side sill and the second side sill, the first side sill and the second side sill being formed as a battery pack mounting beam.

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

[0010] In some embodiments, the underbody further includes a rear cross member that extends along a 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, and a lower surface of the rear cross member and a top surface of the battery pack are vertically spaced apart to define a sealed gap.

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

[0013] In some embodiments, the rear side members include a left rear side member and a right rear side member, the left rear side member connected to the rear cross member left connecting plate and the right rear side member connected to the rear cross member right connecting plate.

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

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

[0016] The first boss and the second boss are both provided with a rear subframe mounting portion, and the first boss and the second boss are provided on the rear side of the rear cross member main body in the longitudinal direction of the vehicle. The heights of the lower side surface of the first boss and the lower end surface of the second boss in the height direction of the vehicle are higher than the height of the lower side surface of the rear cross member main body.

[0017] In some embodiments, the lower body further includes a rear seat front cross member extending along the width direction of the vehicle and 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 higher 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 a circumferential direction to form a closed frame structure.

[0019] In some embodiments, the left rear side member includes a left rear side member front section, a front portion of the left rear side member front section is connected to the rear seat front cross member and a rear portion of the left rear cross member connecting plate, and a height of a bottom portion in the vehicle height direction is higher than a height of an upper surface of the battery pack. The right rear side member includes a right rear side member front section, a front portion of the right rear side member front section is connected to the rear seat front cross member and a rear portion of the right rear cross member connecting plate, and a height of a bottom portion in the vehicle height direction is higher than a height of an upper 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 provided opposite each other in a width direction of the vehicle body. In a longitudinal direction of the vehicle, a rear end surface of the battery pack exceeds a rear end surface of the first side sill and a rear end surface of the second side sill.

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

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

[0023] In some embodiments, the battery pack includes a battery pack upper housing, a battery pack lower housing, and at least one cell. The battery pack upper housing and the battery pack lower housing form an accommodation space, and the at least one cell is disposed in the accommodation space. An upper surface of at least a portion of the battery pack upper housing is formed as a floor of a vehicle body, the cell is fixedly connected to the battery pack upper housing, a top surface of the cell is bonded to the battery pack upper housing, the battery pack lower housing is a cooling plate, and a bottom surface of the cell is bonded to the battery pack lower housing by 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 body, and an upper surface of the battery pack is sealingly 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, and 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 a left side of the lower body, and a second side sill is provided on a right side of the lower body. The sealing plate includes a left sealing plate stage and a right sealing plate stage, and has a left flange at a left end of the left sealing plate stage, the left sealing plate stage is connected to the first side sill by the left flange, and has a right flange at a right end of the right sealing plate stage, and the right sealing plate stage 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 being connected to the front side member, and the rear sealing plate section being connected to the rear cross member.

[0026] In some embodiments, the underbody is provided with a seat cross member extending along a width direction, the battery pack is provided with a battery pack reinforcement beam extending along a width direction, and the battery pack reinforcement 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 will be readily understood by reference to the following detailed description of the embodiments with reference to the drawings, in which: [Brief description of the drawings]

[0028] [Figure 1] FIG. 2 is a top view of a vehicle body structure according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a right side view of the front structure of the vehicle body according to the embodiment of the present disclosure. [Diagram 3] 1 is a schematic diagram of a partial structure of a vehicle body according to an embodiment of the present disclosure. [Figure 4]1 is a schematic diagram of a vehicle body front structure according to an embodiment of the present disclosure, showing the bottom surface of a front cross member. [Diagram 5] FIG. 2 is a bottom view of the front structure of the vehicle body according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a right side view of the rear structure of the vehicle body according to the embodiment of the present disclosure. [Figure 7] 1 is a schematic diagram of a rear structure of a vehicle body according to an embodiment of the present disclosure. [Figure 8] FIG. 8 is a cross-sectional view taken along line AA in FIG. [Figure 9] 1 is a cross-sectional view of a partial structure of a vehicle body according to an embodiment of the present disclosure. [Figure 10] 1 is a cross-sectional view of a partial structure of a vehicle body according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is an exploded view of a battery pack according to an embodiment of the present disclosure. [Figure 12] FIG. 2 is an exploded view of a partial body according to an embodiment of the present disclosure. [Figure 13] FIG. 2 is a schematic diagram of a sealing plate assembly according to an embodiment of the present disclosure. [Figure 14] FIG. 13 is a cross-sectional view of a right sealing plate end according to an embodiment of the present disclosure. [Figure 15] 1 is a cross-sectional view of a front sealing plate end according to an embodiment of the present disclosure. [Figure 16] FIG. 2 is a cross-sectional view of a battery pack according to an embodiment of the present disclosure. [Figure 17] FIG. 2 is a schematic diagram of a sealing plate and a seat cross member according to an embodiment of the present disclosure. [Figure 18] 1 is a schematic diagram of a rear structure of a vehicle body according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an embodiment of the present disclosure will be described in detail, and the embodiment described with reference to the drawings is illustrative. Hereinafter, a vehicle 1 according to the embodiment of the present disclosure will be described with reference to Figs. 1 to 18, and the 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 the vehicle 1, i.e., the front-rear direction, the Y direction refers to the width direction of the vehicle 1, i.e., the left-right direction, and the Z direction refers to the height direction of the vehicle 1, i.e., the up-down direction.

[0030] 7 and 8 , the rear subframe 70 is connected to the lower vehicle body 10, and the battery pack 20 is connected to the lower vehicle body 10 and provided on the underside of the lower vehicle body 10. A front end surface 701 of the rear subframe 70 is formed as a stopper surface extending rearward of the battery pack 20, that is, the battery pack 20 can extend up to the front end surface 701 of the rear subframe 70.

[0031] In the prior art, the floor of the vehicle body is a load-bearing structure of the passenger compartment and is hermetically 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 provided below the floor of the vehicle body and fixedly connected to the vehicle body. Therefore, when the battery pack is installed, a certain assembly gap is formed between the vehicle body structure in the vertical direction of the vehicle, and a certain gap is also formed between the battery pack and the floor of the vehicle body. Due to the gap, the height between the roof and the bottom of the battery pack in the vertical direction of the vehicle increases, which reduces the minimum ground clearance of the vehicle and reduces the passability of the vehicle, increases the vehicle height and raises the center of gravity of the vehicle, which causes certain steering stability problems for the vehicle, and reduces the height of the passenger compartment of the vehicle, which affects the user experience of the vehicle. In the vehicle 1 of the present application, the upper housing of the battery pack 20 and the floor of the vehicle body are integrated into one body, and the upper housing of the battery pack is the floor of the vehicle 1, and the floor of the vehicle body in the prior art is omitted, so that the mounting gap between the floor of the vehicle body and the battery pack is reduced, thereby effectively improving the space utilization rate of the vehicle, effectively improving the minimum ground clearance of the vehicle, increasing the height of the passenger compartment, improving the passenger experience, and preventing the center of gravity from rising. And since the battery pack 20 can transmit force, when a rear collision occurs in the vehicle 1, it can transmit the rear collision force as a force transmission structure. When a rear collision occurs in the vehicle 1, the rear subframe 70 receives the acting force and then contacts the rear end surface 201 of the battery pack 20 forward, so that the battery pack 20 is involved in the force transmission and transmits the force forward. Therefore, the battery pack 20 can withstand the force and distribute the force, thereby improving the safety performance of the vehicle 1.

[0032] According to the vehicle 1 of the embodiment of the present disclosure, the battery pack 20 and the lower body 10 are connected so that at least a part of the upper surface of the battery pack 20 becomes the floor of the vehicle body, thereby improving the space utilization rate of the vehicle 1, expanding the mounting space of the battery pack 20 to improve the capacity of the battery pack 20, improving the space utilization rate of the vehicle 1, reducing the height of the vehicle, and improving the passing performance of the vehicle 1. By forming the front end surface 701 of the rear subframe 70 as a stopper surface extending rearward of the battery pack 20, the mounting space of the battery pack 20 can be expanded rearward, thereby effectively improving the capacity of the battery pack 20 and reducing the distance between the battery pack 20 and the rear subframe 70, and the projection of the battery pack 20 in the front-rear direction and the projection of the rear subframe 70 in the front-rear direction at least partially overlap, so that the battery pack 20 can be a force transmission structure of the vehicle 1. When the rear of the vehicle 1 is hit, the rear subframe 70 can transmit the collision force to the battery pack 20, thereby improving the safety of the vehicle 1.

[0033] In some embodiments, as shown in FIG. 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, and L satisfies 10 mm≦L≦100 mm. By providing in this manner, the mounting clearance of the battery pack 20 can be guaranteed, and the mounting space of the battery pack 20 can be effectively increased, and the rear end surface 201 of the battery pack 20 can be expanded rearward, thereby improving the capacity of the battery pack 20. By providing in this manner, when the rear of the vehicle 1 is hit, the rear subframe 70 contacts the battery pack 20, and the rear collision force can be transmitted forward by the battery pack 20, 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. In addition, when the battery pack 20 is installed, the front end surface 701 of the rear subframe 70 and the battery pack 20 are not directly connected to each other, but have a certain interval, so that the battery pack 20 can be easily installed, thereby improving the assembly speed of the vehicle 1.

[0034] 1 and 3, in some embodiments, the underbody 10 further includes a first side sill 18 and a second side sill 18' that are provided opposite each other in the width direction of the vehicle body. 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 battery pack mounting beams.

[0035] In the prior art, a battery pack mounting beam is provided on the underside of the floor of the vehicle body, which is independent of the side sills, and the battery pack is mounted between the two side sills of the vehicle by the battery pack mounting beam. However, in this design, the extension of the battery pack in the width direction of the vehicle is limited, which greatly reduces the capacity of the battery pack, and the battery pack cannot be effectively integrated into the force transmission path of the vehicle.

[0036] The left side surface of the main body of the battery pack 20 of the vehicle 1 of the present application can extend to the right side of the first side sill 18, and the right side surface of the main body of the battery pack 20 can extend to the left side of the second side sill 18'. In this way, the battery pack 20 is extended on both sides in the Y direction and the battery pack mounting portion is connected to the first side sill 18 and the second side sill 18', thereby increasing the storage space of the battery pack 20 and improving the capacity of the battery pack 20. Since the side sills (first side sill 18 and second side sill 18') of the vehicle are formed as battery pack mounting beams and the battery pack 20 is fixedly connected to the side sills (first side sill 18 and second side sill 18') of the vehicle, when the side sills transmit force, the battery pack 20 can effectively participate in the force transmission, thereby increasing the force transmission path of the vehicle 1 and utilizing the advantages of the large volume and large area of ​​the battery pack 20 to reduce the force per unit area in the force transmission process, reduce damage, and improve the safety performance of the vehicle 1. In short, by providing the battery pack 20 as described above, it is possible to increase the dimension of the battery pack 20 in the Y direction, increase the amount of electric power of the battery pack 20, and improve the cruising distance of the vehicle 1. Furthermore, when the vehicle 1 is hit, the battery pack 20 can participate in the transmission of force, thereby improving the safety performance of the vehicle 1.

[0037] In some embodiments, as shown in FIG. 1 and FIG. 2, the lower body 10 includes a first side sill 18 and a second side sill 18' that are provided opposite to each other in the width direction of the vehicle body. For example, the first side sill 18 is located on the left side in the width direction of the vehicle body, and the second side sill 18' is located on the right side in the width direction of the vehicle body, and the rear end surface 201 of the battery pack 20 exceeds 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. By providing them in this manner, the length of the battery pack 20 can be effectively increased, and the battery pack mounting space in the longitudinal direction of the vehicle 1 is sufficient, thereby effectively improving the capacity of the battery pack 20. And, by placing the battery pack 20 as close as possible to the rear subframe 70, the battery pack 20 is easily involved in the transmission of force, and the safety of the vehicle 1 is improved. Of course, in some other embodiments, in the longitudinal direction of the vehicle 1, 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', and this is not limited thereto.

[0038] In some embodiments, as shown in FIG. 6 and FIG. 7, the lower body 10 includes two rear side members 17 spaced apart in the width direction of the vehicle body, and the height of the bottom surface of the front stage of the rear side members 17 in the height direction of the vehicle is higher than the height of the top surface of the battery pack 20 in the height direction of the vehicle 1. Note that the "height" here refers to a positional relationship, not a dimensional relationship. The bottom surface of the front stage of the rear side members 17 is located above the upper surface of the battery pack 20 in the Z direction of the vehicle 1, and here, "up" may be diagonally above or directly above, and is not limited here. By providing the rear side members 17 in this way, it is possible to prevent the front end of the rear side members 17 from interfering with the installation and rearward extension of the battery pack 20, and the battery pack 20 is easily provided on the lower side of the lower body 10, thereby effectively increasing the battery pack installation 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 FIGS. 1 and 6 , the vehicle 1 further includes a front subframe 30, which is connected to the lower vehicle body 10. A rear end surface of the front subframe 30 is formed as a stopper surface extending forward of the battery pack 20. When provided in this manner, the battery pack 20 can extend up to the rear end surface of the front subframe 30, and an extension dimension of the battery pack 20 in the front-rear direction is increased. Since the battery pack 20 can extend up to the front subframe 30, when a frontal collision occurs to the vehicle 1, the battery pack 20 can transmit force as a force transmission structure.

[0040] For example, a rear end surface of the front subframe 30 is formed as a stopper surface extending forward of the battery pack 20. When the vehicle 1 runs normally, the rear end surface of the front subframe 30 and the front end surface of the battery pack 20 are provided with a gap therebetween, and when a front collision occurs on the vehicle 1, the front subframe 30 receives a rearward acting force and then contacts the front end surface of the battery pack 20, so that the battery pack 20 is involved in transmitting the force, and therefore the battery pack 20 plays a role in withstanding and dispersing the force, thereby improving the safety performance of the vehicle 1. In other words, when provided in this manner, the dimension of the battery pack 20 in the X direction can be increased, the space utilization rate can be improved, and the capacity of the battery pack 20 can be improved, while the battery pack 20 plays a role in dispersing the front collision force, thereby improving the safety performance of the vehicle 1.

[0041] In some embodiments, as shown in Fig. 2, at least an attachment gap is provided between a front end surface of the battery pack 20 and a rear end surface of the front subframe 30. Providing such a gap 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 and expanding the accommodating space for the battery pack 20. In addition, the front subframe 30 can easily contact the battery pack 20 to transmit force, and effectively prevent the battery pack 20 from interfering with the vehicle 1 when it is attached.

[0042] In some embodiments, as shown in Figures 4 and 5, the lower body 10 further includes a front cross member 16 and an opposing A-pillar 14, the front cross member 16 is disposed between the two A-pillars 14, and both left and right ends of the front cross member 16 are connected to the two A-pillars 14, respectively. When a collision occurs to the vehicle 1, the front cross member 16 distributes the front collision force from the vehicle 1 and transmits it to the two A-pillars 14, or transmits the side collision force from one A-pillar 14 to the other A-pillar 14, thereby effectively increasing the force transmission path of the vehicle 1, 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 of the front side members 50 are connected to the front cross member 16 so that the collision force from the front of the vehicle 1 can be transmitted to the front cross member 16 by the front side members 50, and further transmitted to the A-pillar 14 and the center tunnel 40 connected to the front cross member 16 by the front cross member 16, thereby effectively dispersing the collision force from the front by the front cross member 16 and forming multiple force transmission paths, thereby reducing damage caused by the collision force of the vehicle 1, improving the structural stability of the vehicle 1, and improving the safety performance of the vehicle 1.

[0043] In some embodiments, as shown in Figs. 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 apart in the vertical direction 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. Since 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 and does not interfere with the battery pack 20, thereby avoiding the obstruction of the installation of the battery pack 20, thereby effectively increasing the battery pack installation space in the front-rear direction of the vehicle 1, and further improving the capacity of the battery pack 20 and facilitating the installation of the battery pack 20.

[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 may include 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, the second side sill 18' being located on the right side of the vehicle 1, and the center tunnel 400 being located between the first side sill 18 and the second side sill 18' of the vehicle 1. With this arrangement, when the vehicle 1 is collided, the acting force 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, effectively forming a plurality of force transmission paths and improving the force transmission capability of the vehicle 1.

[0045] In some embodiments, as shown in Figures 3 to 4 and 6 to 7, the lower body 10 further includes a rear cross member 11 and two rear side members 17 spaced apart from each other. The rear cross member 11 extends along the width direction of the vehicle 1 and is connected to the rear side member 17 and the side sills (specifically, the first side sill 18 and the second side sill 18'). That is, the rear cross member 11 has both ends connected to the first side sill 18 and the second side sill 18', respectively, and is connected to a front section of the rear side member 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 section of the rear side member 17 is provided on the side of the rear cross member 11 away from the battery pack 20. By configuring it in this manner, it is possible to avoid hindering the extension of the battery pack 20 and the expansion of the mounting space for the battery pack 20, and when the vehicle 1 is subjected to a collision force, all of the force received by the rear side member 17 can be transmitted to the rear cross member 11, and further transmitted by the rear cross member 11 to the side sill, thereby increasing the force transmission path and improving the force transmission efficiency.

[0046] The rear cross member 11 is also configured to be a battery pack mounting beam, i.e., the rear cross member 11 is fixedly connected to the battery pack 20. Therefore, the force received by the rear cross member 11 can be transmitted to the battery pack 20 by the connecting parts, and the battery pack 20 can be taken into the force transmission path. In addition, due to the characteristic of the large area of ​​the battery pack 20, the force transmission effect can be effectively improved. As can be seen, the force transmitted from the rear side member 17 to the rear cross member 11 can be transmitted to the first side sill 18 and the second side sill 18' on both sides by the rear cross member 11, and can also be transmitted to the battery pack 20 by the rear cross member 11, thereby forming multiple force transmission paths. And the battery pack 20 increases the area of ​​the force transmission structure, which can effectively reduce the damage caused by the collision of the vehicle 1.

[0047] In some embodiments, as shown in FIG. 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 part. The upper surface of the battery pack 20 can be vertically spaced apart from the lower surface of the rear cross member 11 to form a sealed 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 sealed gap, which can effectively prevent foreign objects from entering the passenger compartment. When the battery pack 20 is attached to the rear cross member 11, the storage space in the longitudinal direction of the battery pack 20 can be expanded, 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 FIGS. 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 on at least a part 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 on at least a part of the surface of the right end of the rear cross member body 111. When provided in this manner, the rear cross member left connecting plate 112 and the rear cross member right connecting plate 112' can improve the connection reliability between the rear cross member 11 and the rear side member 17, thereby improving the safety of the vehicle 1.

[0049] 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 a left end of the rear cross member main body 111, the right rear side member 1701' is connected to the rear cross member right connecting plate 112', and the rear cross member right connecting plate 112' is connected to a right end of the rear cross member main body 111. When configured in this manner, when the rear end of the vehicle 1 is hit, the rear cross member left connecting plate 112 and the rear cross member right connecting plate 112' transmit the rear collision force from the rear end of the vehicle 1 forward via the rear side member 17, and then to the rear cross member left connecting plate 112, the rear cross member right connecting plate 112' and the rear cross member main body 111, guiding the collision force to be transmitted in the width direction of the vehicle 1, and thereby dispersing the force received when the vehicle 1 is hit from the rear, thereby playing a role in mitigating the rear collision force and preventing the vehicle 1 from deforming due to the rear collision force, thereby improving the load-bearing capacity of the vehicle 1 and improving the safety of the vehicle 1.

[0050] 7 and 8, in some embodiments, 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 main 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 main body 111 and the second side sill 18'.

[0051] When configured in this manner, when the rear end of the vehicle 1 is hit, the rear cross member left connecting plate 112 and the rear cross member right connecting plate 112' transmit the rear collision force from the rear end of the vehicle 1 forward via the rear side member 17, and then to the rear cross member left connecting plate 112, the rear cross member right connecting plate 112' and the rear cross member main body 111, guiding the collision force to be transmitted in the width direction of the vehicle 1.The collision force can also be transmitted to the first side sill 18 and the second side sill 18' via the connection point between the rear cross member left connecting plate 112 and the first side sill 18, and the connection point between the rear cross member right connecting plate 112' and the second side sill 18'.This makes it possible to disperse the force received when the vehicle 1 is hit from the rear, thereby mitigating the rear collision 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 rear cross member left connecting plate 112, and a second boss 1121' is provided on the rear cross member right connecting plate 112'. Both the first boss 1121 and the second boss 1121' are provided with rear subframe mounting portions P, and the first boss 1121 and the second boss 1121' are provided on the rear side of the rear cross member main 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 main body 111 in the longitudinal direction of the vehicle 1, and the cross-sectional area of ​​the protruding portions in the width direction may gradually decrease.

[0053] In some embodiments of the present disclosure, the rear cross member 11 has a rear subframe mounting portion P on its lower side to which the rear subframe 70 is attached, and the rear cross member 11 and the rear subframe 70 are fixedly attached to the rear subframe mounting portion P by bolts. By fastening a force transmission structure to the rear subframe mounting portion P with a buckle, 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 rear cross member left connecting plate 112, and a second boss 1121' is provided on the rear cross member right connecting plate 112', and both the first boss 1121 and the second boss 1121' have rear subframe mounting portions P, and the first boss 1121 and the second boss 1121' are provided on the rear side of the rear cross member main body 111 along the longitudinal direction of the vehicle 1.

[0055] In some embodiments, as shown in Figs. 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. Note that "height" here refers to a positional relationship, not a dimensional relationship. When provided in this manner, the first boss 1121 and the second boss 1121' can 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 connection reliability 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 area Q, ensure the effectiveness of the force transmission at the rear, and improve the safety of the vehicle 1.

[0056] 7, in some embodiments, the left rear side member 1701 includes a left rear side member front section 17011, the left rear side member front section 17011 is connected at its front portion to the rear seat front cross member 12 and at its rear portion to the rear cross member left connecting plate 112, and the height of the bottom portion in the height direction of the vehicle 1 is higher than the height of the upper surface of the battery pack 20. The right rear side member 1701' includes a right rear side member front section 17011', the right rear side member front section 17011' is connected at its front portion to the rear seat front cross member 12 and at its rear portion to the rear cross member right connecting plate 112', and the height of the bottom portion in the height direction of the vehicle 1 is higher than the height of the upper surface of the battery pack 20. Note that the "height" here refers to a positional relationship, not a dimensional relationship. When configured in this manner, the left rear side member 1701 and the right rear side member 1701' can be positioned above the battery pack 20, thereby raising the upper surface of the battery pack 20 and extending it below the bottom of the left rear side member front section 17011 and the bottom of the right rear side member front section 17011', thereby increasing the storage space in the height direction of the battery pack 20, improving space utilization rate and occupant space, and reducing the height of the vehicle.

[0057] In some embodiments, as shown in FIG. 7 and FIG. 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 the rear side member 17, the first side sill 18, and the second side sill 18'. The passenger seat 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 left rear side member 1701 and the rear end of the first side sill 18, and the right end of the rear seat front cross member 12 may be connected to the right rear side member 1701' and the rear end of the second side sill 18'. When provided in this manner, the rear seat front cross member 12 can transmit a rear collision force to the rear seat front cross member 12 by the rear side member 17 when the rear side of the vehicle 1 is hit, thereby mitigating and dispersing the rear collision force, improving the load-bearing capacity of the vehicle 1, and improving the safety of the vehicle 1.

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

[0059] In some embodiments, as shown in Fig. 7, the height of the lower surface of the rear seat front cross member 12 in the height direction of the vehicle 1 is higher than the height of the upper surface of the battery pack 20. Note that "height" here refers to a positional relationship, not a dimensional relationship. Since 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 being provided to hinder the extension of the battery pack 20 in the Z direction, thereby increasing the dimension of the battery pack 20 in the Z direction, improving the space utilization rate, and improving the cruising range of the vehicle 1.

[0060] In some embodiments, as shown in FIGS. 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 side of the vehicle 1 is hit, the rear collision force can be transmitted to the rear seat front cross member 12 by the rear side member 1701 and the right rear side member 1701′, thereby mitigating and dispersing the rear collision force, improving the load-bearing capacity of the rear side of the vehicle 1, and improving the safety of the vehicle 1.

[0061] In some embodiments of the present 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 members 17 at the corresponding connection points.

[0062] In some embodiments of the present 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 closed 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 square-shaped structure, which can greatly improve the force transmission capacity of the rear side 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, distribute and transmit the side collision force, front collision force, and rear collision force, improve the force transmission capacity, and effectively reduce the damage caused by the collision.

[0063] In some embodiments of the present disclosure, the underbody 10 includes a first side sill 18 and a second side sill 18' that are provided opposite to each other in the width direction of the vehicle body. In the longitudinal direction of the vehicle, the rear end surface 201 of the battery pack 20 exceeds the rear end surface of the first side sill 18 and the rear end surface of the second side sill 18'. To the rear of the longitudinal direction of the vehicle, the rear end surface 201 of the battery pack 20 exceeds the rear end surface of the first side sill 18 and the rear end surface of the second side sill 18'. This arrangement can effectively improve the capacity of the battery pack and increase the length of the battery pack, thereby improving the cruising range of the vehicle.

[0064] In some embodiments, as shown in Figures 9, 10 and 11, the battery pack 20 includes a battery pack upper housing 2011, a battery pack lower housing 2012 and at least one cell 202. The battery pack upper housing 2011 and the battery pack lower housing 2012 form an accommodating space 2013, the at least one cell 202 is disposed in the accommodating space 2013, and at least a portion of the upper surface of the battery pack upper housing 2011 forms a floor of the vehicle body. As can be seen, in one embodiment of the present application, the battery pack upper housing 2011 and the floor of the vehicle body are integrated together, i.e., the floor of the vehicle body is omitted, and the battery pack upper 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, and thus can improve the driving range of the vehicle to a certain extent.

[0065] In order to mount the battery pack 20 to the vehicle body 10 in the Y direction of the vehicle 1, the mounting portions at both left and right ends of the battery pack upper housing 2011 are fixedly connected to the first side sill 18 and the second side sill 18', respectively. That is, the left extension portion 20111 of the battery pack upper housing 2011 is fixedly connected to the first side sill 18, and the right extension portion 20111' of the battery pack upper housing 2011 is fixedly connected to the second side sill 18'. The left extension portion and the right extension portion may each be provided with a plurality of through holes, and a plurality of through holes are provided at corresponding positions of the two side sills 18 and 18', and the bolts 19 or screws are fixedly connected to the mounting holes by passing through these through holes, thereby enabling the battery pack 20 to 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 as to better connect the battery pack 20 to the vehicle 1 .

[0066] The following description will be given taking as an example the case where 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 left extension 20111 is provided with an extension connection through-hole (not shown) at a location corresponding to the first side sill housing 1801, and the first side sill 18 and the left extension 20111 are connected by a connection bolt 19. This can improve the connection reliability of the first side sill 18, thereby improving the safety of the vehicle 1.

[0067] In some embodiments, the battery pack upper housing 2011 and the battery pack lower housing 2012 form an accommodation space 2013 that can accommodate at least one cell 202, and the at least one cell 202 is provided in the accommodation space 2013. At least a part of the upper surface of the battery pack upper housing 2011 is formed as a floor of a vehicle body. In one embodiment of the present disclosure, the battery pack upper housing 2011 is a metal housing, and may be a housing made of steel or other metals. In this way, when the upper surface of a part of the battery pack 20 is formed as a floor of a vehicle body, it is possible to better form a load-bearing structure, prevent the structural strength of the battery pack 20 from being too low, and also to better protect the battery pack 20 and the cell 202, thereby improving the safety and life of the cell 202. By forming at least a part of the upper surface of the battery pack upper housing 2011 as the floor of the vehicle body, the gap between the battery pack 20 and the vehicle body can be reduced, driving noise can be reduced, and the battery pack mounting space of the vehicle 1 can be effectively increased, so that the electric capacity of the battery pack 20 is large, the total electric energy of the battery pack 20 is increased, and the cruising distance of the vehicle 1 can be improved. In addition, the center of gravity of the vehicle can be lowered, the drivability of the vehicle can be improved, the space of the passenger compartment inside the vehicle can be increased, and the customer experience can be effectively improved. Furthermore, materials can be saved, the total weight of the vehicle 1 can be reduced, and a lightweight design of the vehicle 1 can be easily realized.

[0068] In some embodiments, as shown in FIG. 11-FIG. 12, the cell 202 is fixedly connected to the battery pack upper housing 2011. The top surface of the cell 202 is bonded to the battery pack upper housing 2011, and the battery pack lower housing 2012 may be a cooling plate, and the bottom surface of the cell 202 is bonded to the battery pack lower housing 2012 by a thermally conductive adhesive 204. In this structure, the battery pack bottom housing in the conventional battery pack structure is omitted and replaced with a cooling plate, so that the weight of the battery pack 20 can be effectively reduced and the energy density of the battery pack 20 can be improved. In addition, the height of the battery 20 in the Z direction of the vehicle 1 can be reduced, the minimum ground clearance of the vehicle can be improved, and passability can be provided. In addition, by providing the cooling plate under the cell 202, the influence on the passenger compartment due to the thermal management of the battery pack 20 can be effectively avoided, thereby improving the riding experience. By bonding the upper side of the cell 202 to the battery pack upper housing 2011, the cell 202 can be effectively fixed and the mode and strength of the battery pack upper housing 2011 can be effectively improved, so that the weight applied from the passenger compartment to the battery pack upper housing 2011 can be supported and the battery pack upper housing 2011 can be effectively involved in the force transmission of the vehicle 1. Specifically, when a side collision occurs to the vehicle 1, when the force acting on the side sills 18 and 18' is transmitted to the battery pack upper housing 2011, the force can be transmitted by effectively using the cell 202 bonded to the battery pack upper housing 2011. By bonding the lower side of the cell 202 to the cooling plate, the cell 202 can be effectively fixed and the heat transfer between the cell 202 and the cooling plate can be improved, the heat transfer efficiency can be improved, and the heat management efficiency can be improved. The battery pack upper housing 2011 is hermetically connected to the battery pack lower housing 2012 to prevent foreign matter from entering the inside of the battery pack 20 and affecting the life or safety of the battery pack 20.

[0069] In the battery pack 20 of the present application, the upper battery pack housing 2011 is made to be the floor of the vehicle body, so that when the battery pack 20 is subjected to a large force, the cells 202 do not come off the upper battery pack housing 2011, improving the connection stability of the cells 202 and ensuring the safety of the battery pack 20.

[0070] In some embodiments, as shown in FIGS. 10, 11, and 16, the battery pack 20 may include at least one cell 202, and the longitudinal direction of the cell 202 coincides with the longitudinal direction of the vehicle 1. The at least one cell 202 is provided in the accommodation space 2013 of the battery pack 20, and the longitudinal direction of the cell 202 is set to be along the longitudinal direction of the vehicle 1. With such an arrangement, the battery pack 20 can improve the energy density and transmit force by effectively using the cell 202. When a side collision occurs to the vehicle 1, a portion of the cell 202 with a large area receives the collision force, so that the pressure can be effectively reduced and structural destruction of the cell 202 can be prevented, and the force transmission area can be increased, the force can be dispersed in the longitudinal direction of the vehicle 1, and local damage can be prevented from being too large.

[0071] 10 and 11, the battery pack 20 includes a plurality of cells 202, and the plurality of cells 202 are arranged in parallel along the width direction of the vehicle 1. When arranged in this manner, in the battery pack 20, the cells 202 can easily participate in the transmission of force during a side collision of the vehicle 1, and this improves the space utilization rate of the battery pack 20 and makes it easy to increase the number of cells 202 accommodated in the battery pack 20, thereby increasing the total amount of electric power of the battery pack 20 and improving the cruising distance of the vehicle 1.

[0072] 12 , a sealing plate assembly 60 is provided on the underbody 10, and the top surface of the battery pack 20 is sealingly connected to the sealing plate assembly 60. The sealing plate assembly 60 is provided on the underbody 10 of the vehicle 1, and seals the connection points 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 underbody 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 FIG. 9 and FIG. 13, the sealing plate assembly 60 includes an annular sealing plate 6001 and at least one sealing member 6002, and the sealing member 6002 is 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 between the rear side of the front side member 50, the front side of the rear cross member 11, and the two side sills to form an annular shape, and the sealing plate assembly 60 is also connected to the front side member 17, the rear cross member, and the two side sills, so that it can effectively form a seal with the battery pack 20, thereby completely sealing the passenger compartment by the battery pack upper housing 2011 to prevent substances outside the vehicle from entering the passenger compartment through a gap between the battery pack 20 and the vehicle body. The sealing member 6002 is configured in an annular shape, and may be two or more, and two or more sealing members 6002 are provided between the annular sealing plate 6001 and the battery pack 20 to form a multi-layer seal, thereby providing a higher sealing effect. The two or more sealing members are also annular sealing members and are arranged annularly, i.e., two adjacent sealing members, one on the inside and the other on the outside, are arranged with a gap between them, thereby improving the sealing effect of the sealing member 6002.

[0074] The sealing plate 6001 may be an annular sealing plate that is integrally molded, or may be an annular sealing plate that is formed by connecting a plurality of sub-sealing plates.

[0075] 9, the sealing plate 6001 has a first planar portion 6001a, 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 sealing performance of the vehicle 1.

[0076] In some embodiments, the sealing member 6002 is a silicone foam member. The silicone foam member has properties such as light weight, deformability, excellent sound insulation, and excellent heat insulation. By making the sealing member 6002 a foam member, the sealing member 6002 can block substances such as water and air, and can improve the sound insulation of the vehicle 1 and improve the comfort of passengers. The silicone foam member may be sealed and compressed to a certain 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 being 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. In addition, 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 underbody 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 section 6001b and a right sealing plate section 6001b', with a left flange 6001c at the left end of the left sealing plate section 6001b, which is connected to the first side sill 18 by the left flange 6001c, and a right sealing plate section 6001b' with a right flange 6001c' at the right end of the right sealing plate section 6001b', which is connected to the second side sill 18' by the right flange 6001c'.

[0078] Hereinafter, the first side sill 18 is connected to the left sealing plate stage 6001b as an example. A left flange 6001c extending along the vertical direction is provided on the left side of the left sealing plate stage 6001b. Preferably, the left flange 6001c may be a flange extending upward or downward. The left flange 6001c is fixedly connected to the first side sill 18, so that the left sealing plate 6001b can be effectively fixed to the first side sill 18, which ensures the connection reliability between the sealing plate 6001 and the first side sill 18 and effectively improves the sealing 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 inside of the vehicle 1 and improve the riding 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 section 6001d and a rear sealing plate section 6001f, the front sealing plate section 6001d is connected to the front side member 50, and the rear sealing plate section 6001f is connected to the rear cross member 11. The sealing plate 6001 may include a front sealing plate section 6001d and a rear sealing plate section 6001f, the front sealing plate section 6001d is provided with a front flange 6001e connected to the front side member 50, the front sealing plate section 6001d is fixedly connected to the front side member 50 by the front flange 6001e, the rear sealing plate section 6001f is provided with a rear flange connected to the rear cross member 11, and the rear sealing plate section 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 can improve the sealing performance.

[0080] As can be seen, the flat surface provided on the sealing plate assembly 60 and the flat surface provided on the battery pack 20 can provide better sealing, and the opposing flat surfaces can provide better sealing at the opposing positions of the sealing member 6002, 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 extending along the left-right direction. The battery pack 20 is provided with a battery pack reinforcement beam 2015 extending along the width direction, and the battery pack 20 is connected to the seat cross member 13 by the battery pack reinforcement beam 2015.

[0082] The lower body 10 may be provided with a seat cross member 13 extending along 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 reinforcement beam 2015 extending along the width direction at a 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 reinforcement beam 2015. The seat cross member 13 can improve the connection reliability between the battery pack 2 and the lower body 10, and when the vehicle 1 receives a side collision force, the side collision force can be transmitted along the width direction of the vehicle 1 by the battery pack reinforcement beam 2015, thereby fulfilling the role of ensuring the reliability of the vehicle 1 and the battery pack 20.

[0083] In addition, in the description of the present disclosure, the orientations or positional relationships indicated by the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial direction," "radial direction," "circumferential direction," and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to easily explain and simplify the description of the present disclosure, and do not indicate or suggest that the illustrated devices or parts must have a specific orientation and be configured and operated in a specific orientation, and therefore should not be understood as limiting the present disclosure.

[0084] In the description of this disclosure, a "first feature" and a "second feature" may include one or more of the features. In the description of this disclosure, "multiple" means two or more. In the description of this disclosure, a first feature being "above" or "below" a second feature may include direct contact between the first feature and the second feature, or may include contact between the first feature and the second feature through another feature between them without direct contact. In the description of this disclosure, a first feature being "above," "above" or "on the top surface" of a second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the horizontal height of the first feature is higher than that of the second feature.

[0085] In the description herein, a description that refers to the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," "particular examples," or "some examples" means that the specific feature, configuration, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the description herein, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example.

[0086] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and objectives of the present disclosure, and that the scope of the present 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 connection plate 1121 First Boss 112' Rear cross member right connection plate 1121' 2nd 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 Left rear side member front section 1701' Right rear side member 17011' Right rear side member front section 18 First side sill 18' 2nd side sill 19 Connection voltage 20 Battery Pack 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 materials, 70 Rear subframe 701 Front end surface Q Force transmission area P Rear subframe mounting part

Claims

1. The vehicle 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 underside of the lower body (10); A vehicle (1), characterized in that a front end surface (701) of the rear subframe (70) is formed as a stopper surface extending rearward of the battery pack (20), and an upper surface of at least a portion of the battery pack (20) is formed as a floor of a vehicle body.

2. 2. The vehicle (1) according to claim 1, characterized in that a minimum distance between a 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 10 mm≦L≦100 mm.

3. The underbody (10) comprises: Further comprising a first side sill (18) and a second side sill (18'), The vehicle (1) according to claim 1 or 2, characterized in that the second side sill (18') and the first side sill (18) are arranged opposite 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 battery pack mounting beams.

4. The underbody (10) comprises: The vehicle (1) according to claim 3, 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 a bottom surface of a front section of the rear side members (17) in the height direction of the vehicle (1) being higher than the height of a top surface of the battery pack (20) in the height direction of the vehicle (1).

5. The underbody (10) further includes a rear cross member (11), The vehicle (1) according to claim 4, 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').

6. 6. The vehicle (1) of claim 5, wherein 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 vertically spaced apart to form a sealed gap.

7. The rear cross member (11) is A rear cross member left connecting plate (112); A rear cross member right connecting plate (112'); A rear cross member body (111), 7. The vehicle (1) according to claim 6, wherein 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.

8. The rear side member (17) is a left rear side member (1701) and a right rear side member (1701′), the left rear side member (1701) being connected to the rear cross member left connecting plate (112); 8. The vehicle (1) according to claim 7, characterized in that the right rear side member (1701') is connected to the rear cross member right connecting plate (112').

9. 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), 9. The vehicle (1) according to claim 8, 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').

10. A first boss (1121) is provided on the rear cross member left connecting plate (112), and a second boss (1121') is provided on the rear cross member right connecting plate (112'), The first boss (1121) and the second boss (1121') are each provided with a rear subframe mounting portion (P), and the first boss (1121) and the second boss (1121') are provided on a rear side of the rear cross member main body (111) along the longitudinal direction of the vehicle (1), A vehicle (1) as described in claim 8 or 9, characterized in that the height of the lower 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 surface of the rear cross member main body (111).

11. The vehicle (1) described in claim 10, characterized in that 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 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 higher than the height of the upper surface of the battery pack (20).

12. 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 11, 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 a circumferential direction to form a sealed frame structure.

13. the left rear side member (1701) includes a left rear side member front section (17011), the front part of which is connected to the rear seat front cross member (12) and the rear part 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 upper surface of the battery pack (20); The vehicle (1) of claim 11 or 12, characterized in that the right rear side member (1701') includes a right rear side member front section (17011'), the front section of the right rear side member front section (17011') is connected to the rear seat front cross member (12) at its front and to the rear cross member right connecting plate (112') at its rear, and the height of the bottom of the right rear side member front section (17011') in the height direction of the vehicle (1) is higher than the height of the upper surface of the battery pack (20).

14. The underbody (10) comprises: A first side sill (18) and a second side sill (18'), The second side sill (18') and the first side sill (18) are provided opposite to each other in the width direction of the vehicle body, The vehicle (1) according to claim 1 or 2, characterized in that, in the longitudinal direction of the vehicle (1), a 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').

15. The vehicle further includes a front subframe (30), the front subframe (30) being connected to the underbody (10); The vehicle (1) according to any one of claims 1 to 14, characterized in that a rear end surface of the front subframe (30) is formed as a stopper surface extending forward of the battery pack (20).

16. The underbody (10) further includes a front side member (50), and a bottom surface of a rear end of the front side member (50) and a top surface of the battery pack (20) are spaced apart vertically to form a sealed gap; or 6. The vehicle (1) of claim 5, wherein the lower body (10) further includes a front cross member (12), a front side member (50), and an opposing A-pillar, both ends of the front cross member (12) being connected to the A-pillars, and the front side member (50) being connected to the front cross member (12).

17. The battery pack (20) comprises: A battery pack upper housing (2011); A battery pack lower housing (2012); At least one cell (202); The vehicle (1) according to any one of claims 1 to 16, characterized in that the battery pack upper housing (2011) and the battery pack lower housing (2012) form an accommodation space (2013), at least one of the cells (202) is provided in the accommodation space (2013), an upper surface of at least a portion of the battery pack upper housing (2011) is formed as a floor of a vehicle body, the cell (202) is fixedly connected to the battery pack upper housing (2011), a top surface of the cell (202) is bonded to the battery pack upper housing (2011), the battery pack lower housing (2012) is a cooling plate, and a bottom surface of the cell (202) is bonded to the battery pack lower housing (2012) by a thermally conductive adhesive (204).

18. The vehicle (1) described in claim 17, characterized in that the battery pack (20) includes a plurality of the cells (202), the longitudinal direction of the plurality of the cells (202) coincides with the longitudinal direction of the vehicle (1), and the plurality of the cells (202) are arranged side by side along the width direction of the vehicle (1).

19. a sealing plate assembly (60) is provided on the underbody (10), and an upper surface of the battery pack (20) is sealed and connected to the sealing plate assembly (60); The sealing plate assembly (60) comprises: An annular sealing plate (6001); At least one sealing member (6002), the sealing member (6002) being provided between the sealing plate (6001) and the battery pack (20); the sealing plate (6001) has a first planar portion (6001a), the battery pack (20) has a second planar portion (2014), the first planar portion (6001a) and the second planar portion (2014) face each other, the sealing member (6002) is provided between the first planar portion (6001a) and the second planar 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 section (6001b) and a right sealing plate section (6001b'), the left end of the left sealing plate section (6001b) has a left flange (6001c), the left sealing plate section (6001b) is connected to the first side sill (18) by the left flange (6001c), the right end of the right sealing plate section (6001b') has a right flange (6001c'), the right sealing plate section (6001b') has a right flange (6001c'), The vehicle (1) according to claim 16, characterized in that the right flange (6001c') is connected to the second side sill (18'), and the sealing plate (6001) further includes a front sealing plate section (6001d) and a rear sealing plate section (6001f), the front sealing plate section (6001d) being connected to the front side member (16) and the rear sealing plate section (6001f) being connected to the rear cross member (11).

20. The lower body (10) is provided with a seat cross member (13) extending along the width direction, The vehicle (1) according to any one of claims 1 to 19, characterized in that the battery pack (20) is provided with a battery pack reinforcement beam (2015) extending along the width direction, and the battery pack reinforcement beam (2015) is connected to the seat cross member (13).

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