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; and the lower vehicle body further comprises a front longitudinal beam, the rear end bottom surface of the front longitudinal beam is arranged in a vertical direction and spaced from the top surface of the battery pack to form a sealing gap. According to the vehicle, at least part of the upper surface of the battery pack is formed as the vehicle floor, so that the space utilization and the passenger space are improved, and the overall height of the vehicle can be reduced. In addition, the rear end bottom surface of the front longitudinal beam can be prevented from being hindered during the installation of the battery pack, the installation position of the battery pack can be improved, the chassis height of the vehicle is improved, the passability of the vehicle is improved, the overall height of the vehicle can be reduced, and the space in the vehicle can be increased.

Description

[0001] This case is a divisional application of application number 202210346559.4, 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, and the promotion of new energy vehicles has become a major way to solve these problems. In existing new energy vehicles, battery pack mounting beams are generally installed under the vehicle floor to install the battery pack. To ensure vehicle safety, the available space for the battery pack is relatively small due to structural reasons in the lower body, and there is a large gap between the battery pack and the floor, which affects both the vehicle's range and its passability. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a vehicle that has high space utilization, improved vehicle passability, and good safety performance.

[0005] According to an embodiment of the present invention, a vehicle includes: a lower body and a battery pack, the battery pack being 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 front longitudinal beam, the rear end bottom surface of the front longitudinal beam being vertically spaced from the top surface of the battery pack 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 overall vehicle height can be reduced, improving space utilization and passenger space. Furthermore, by configuring the rear end bottom surface of the front longitudinal beam and the top surface of the battery pack to form a sealed gap in the vertical direction, the rear end bottom surface of the front longitudinal beam can be prevented from obstructing the battery pack installation, while simultaneously raising the battery pack's installation position. This increases the vehicle's chassis height, improves vehicle passability, reduces overall vehicle height, and increases interior space.

[0007] In some embodiments, a sealing structure is provided between the bottom rear end of the front longitudinal beam and the top surface of the battery pack.

[0008] In some embodiments, the rear side of the front longitudinal beam includes an upper force transmission structure and a lower force transmission structure. The rear end of the upper force transmission structure is connected to the front crossbeam, and the bottom surface of the rear end of the lower force transmission structure is spaced apart from the battery pack in the vertical direction to form a sealing gap.

[0009] In some embodiments, the lower force transmission structure is connected to the sill beam and the central passage.

[0010] In some embodiments, the lower force transmission structure is a herringbone structure.

[0011] In some embodiments, the rear bottom surface of the lower force transmission structure is parallel to the top surface of the battery pack.

[0012] In some embodiments, the front longitudinal beam includes a first connecting segment, a second connecting segment, and a third connecting segment. The rear end of the first connecting segment is connected to the front end of the second connecting segment and the front end of the third connecting segment. Along the longitudinal direction of the vehicle, the front end of the second connecting segment and the front end of the third connecting segment are connected, and the rear end of the second connecting segment and the rear end of the third connecting segment gradually move away from each other.

[0013] In some embodiments, the lower body also includes two A-pillars arranged opposite each other, the two A-pillars being connected to both ends of the front crossbeam respectively; the second connecting section is located outside the third connecting section, the second connecting section is connected to the A-pillars, and the bottom surface of the second connecting section and the bottom surface of the third connecting section are in the same plane.

[0014] In some embodiments, the lower surface of the second connecting segment has at least one mounting point, and the battery pack extends to the mounting point of the second connecting segment and is fixedly connected to the front longitudinal beam through the mounting point.

[0015] In some embodiments, the lower vehicle body further includes a left sill beam and a right sill beam disposed opposite to each other in the width direction of the vehicle body, and the battery pack is connected to the left sill beam and the right sill beam; the front end face of the battery pack extends beyond the front end face of the left sill beam and the front end face of the right sill beam in the length direction of the vehicle, or the front end face of the battery pack is flush with the front end face of the left sill beam and the front end face of the right sill beam in the length direction of the vehicle.

[0016] In some embodiments, the front longitudinal beam includes a left front longitudinal beam and a right front longitudinal beam spaced apart in the left-right direction of the vehicle, and a bottom crossbeam connects the left front longitudinal beam and the right front longitudinal beam, with the bottom surface of the bottom crossbeam spaced apart from the top surface of the battery pack in the vertical direction.

[0017] In some embodiments, the rear end bottom surface of the front longitudinal beam is parallel to the top surface of the battery pack.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. 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 16This is a cross-sectional view of a battery pack according to an embodiment of the present invention;

[0036] Figure 17 This 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 100; Lower body 1;

[0040] Battery pack 2; upper housing of battery pack 2011; left extension 20111; right extension 20111'; lower housing of battery pack 2012; accommodating space 2013; second flat part 2014; battery pack reinforcing beam 2015; battery cell 202; structural adhesive 203; thermally conductive adhesive 204;

[0041] 3. Front subframe; 4. Central tunnel;

[0042] Front longitudinal beam 5; left front longitudinal beam 501; right front longitudinal beam 501'; first connecting section 502; second connecting section 503; third connecting section 504;

[0043] A-pillar 6; Front crossbeam 7; Rear subframe 8; Rear longitudinal beam 9; Left rear longitudinal beam 901; Right rear longitudinal beam 901'

[0044] Battery pack mounting beam 10; middle crossbeam 11; rear seat front crossbeam 12; seat crossbeam 13;

[0045] Bottom crossbeam 14; Subframe mounting bracket 15; Front seat front crossbeam 16;

[0046] Left sill beam 18; Right sill beam 18'; Left sill shell 1801; Left sill shell 18011; Left sill shell 18011'; Upper right flange 18012; Lower right flange 18013; Upper left flange 18012'; Lower left flange 18013'; Left sill reinforcing beam 1802; Cavity 18021; Connecting bolt 19;

[0047] Sealing plate assembly 20; sealing plate 2001; first flat part 2001a; left sealing plate section 2001b; right sealing plate section 2001b'; left flange 2001c; right flange 2001c'; front sealing plate section 2001d; front folded edge 2001e; rear sealing plate section 2001f; seal 2002; force transmission zone Q; rear mounting point P. Detailed Implementation

[0048] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-18The vehicle 100 described according to an embodiment of the present invention includes a lower body 1, a front subframe 3, and a battery pack 2. Herein, the X direction refers to the length direction of the vehicle 100, i.e., the front-to-back direction; the Y direction refers to the width direction of the vehicle 100, i.e., the left-to-right direction; and the Z direction refers to the height direction of the vehicle 100, i.e., the up-down direction.

[0049] Specifically, such as Figures 1-2 As shown, the front subframe 3 is connected to the lower body 1, and the battery pack 2 is connected to the lower body 1 and disposed on the lower side of the lower body 1. The rear end face of the front subframe 3 forms a limiting surface for the forward extension of the battery pack 2. That is, the battery pack 2 can extend to the rear end face of the front subframe 3. This arrangement can, on the one hand, increase the X-axis dimension of the battery pack 2 and improve space utilization; on the other hand, because the battery pack 2 extends to the front subframe 3, in the event of a frontal collision, in addition to the force transmission of the front longitudinal beam 5, the battery pack 2 can also act as a force transmission structure. The rear end face of the front subframe 3 forms a limiting surface for the forward extension of the battery pack 2. When the vehicle 100 is driving normally, the rear end face of the front subframe 3 and the front end face of the battery pack 2 are spaced apart. If the vehicle 100 is involved in a frontal collision, the front subframe 3 will be pushed backward and contact the front end face of the battery pack 2 after being subjected to force, so that the battery pack 2 can participate in force transmission. Therefore, the battery pack 2 can play a role in resisting and dispersing force transmission, thereby improving the safety performance of the vehicle 100.

[0050] In existing technologies, vehicle floors are generally sheet metal structures, serving as crucial components for the load-bearing and sealing of the passenger compartment. The upper casing of the battery pack is typically made of aluminum, and the battery pack is fixedly mounted beneath the vehicle floor. Since the vehicle floor and battery pack are designed separately as two distinct components, a clearance needs to be reserved between them in the Z-direction for assembly, resulting in low space utilization and a relatively high overall vehicle height.

[0051] Therefore, the existing vehicle floor can be omitted, and at least the upper surface of the battery pack 2 can be formed as the vehicle floor. For example, the vehicle floor can be the front floor of the vehicle, which improves space utilization and passenger space, reduces the overall vehicle height, improves the passability of the vehicle 100, and simplifies the structure of the vehicle 100 and improves assembly efficiency.

[0052] like Figure 4As shown, the lower vehicle body 1 also includes a front longitudinal beam 5. The rear bottom surface of the front longitudinal beam 5 and the top surface of the battery pack 2 are vertically spaced to form a sealed gap. This arrangement serves two purposes: firstly, it prevents the rear bottom surface of the front longitudinal beam 5 from interfering with the top surface of the battery pack 2, thus preventing the rear bottom surface of the front longitudinal beam 5 from obstructing the installation of the battery pack 2. It also raises the installation position of the battery pack 2, thereby increasing the chassis height of the vehicle 100 and improving the vehicle's passability. It can also reduce the overall vehicle height and increase interior space. Secondly, it facilitates the transmission of force by the front longitudinal beam 5 to the left and right sides in the width direction, improving the transmission and dispersion of force and enhancing the safety performance of the vehicle 100.

[0053] According to an embodiment of the present invention, by forming the rear end face of the front subframe 3 as a limiting surface for the forward extension of the battery pack 2, the longitudinal dimension of the battery pack 2 can be increased, improving space utilization. Simultaneously, the battery pack 2 can function as a force-transmitting structure, thereby enhancing the safety performance of the vehicle 100. By forming at least a portion of the upper surface of the battery pack 2 as the vehicle floor, the overall vehicle height can be reduced, improving space utilization and passenger space. Furthermore, by setting the rear end bottom surface of the front longitudinal beam 5 and the top surface of the battery pack 2 vertically spaced to form a sealing gap, the rear end bottom surface of the front longitudinal beam 5 can be prevented from obstructing the installation of the battery pack 2. This also raises the installation position of the battery pack 2, thereby increasing the chassis height of the vehicle 100, improving its passability, reducing the overall vehicle height, and increasing interior space.

[0054] In some embodiments, such as Figure 2 As shown, the minimum distance between the front end face of the battery pack 2 and the rear end face of the front subframe 3 is d1, where d1 satisfies: 10mm ≤ d1 ≤ 100mm. For example, d1 = 50mm. This prevents the distance between the front end face of the battery pack 2 and the rear surface of the front subframe 3 from becoming too large, thus increasing the space for the battery pack 2 in the X direction and expanding the space for accommodating it. Furthermore, it facilitates contact between the front subframe 3 and the battery pack 2 for force transmission. Additionally, the rear surface of the front subframe 3 is not directly connected to the battery pack 2 during installation and is spaced apart, which facilitates the installation of the battery pack 2, increases the assembly speed of the vehicle 100, and avoids interference between the front end face of the battery pack 2 and the rear surface of the front subframe 3 during installation or when the vehicle 100 is in motion.

[0055] In some embodiments, such as Figure 1 and Figure 3As shown, the lower vehicle body 1 also includes a left sill beam 18 and a right sill beam 18' arranged opposite each other in the width direction of the vehicle body. The battery pack 2 is connected to the left sill beam 18 and the right sill beam 18' so that the left sill beam 18 and the right sill beam 18' form a battery pack mounting beam. In the prior art, the battery pack mounting beam is used to install the battery pack. There are two battery pack mounting beams, which are respectively arranged in the Y direction between the battery pack and the left sill beam and the right sill beam. Such a battery pack mounting beam arrangement results in a small space for the battery pack in the width direction of the vehicle, which is not conducive to the large-size arrangement of the battery pack. At the same time, when the vehicle is involved in a side collision, the battery pack mounting beam cannot effectively combine the force transmission between the battery pack and the left sill beam and the right sill beam.

[0056] This application extends the battery pack 2 to both sides in the Y direction and directly connects it to the left sill beam 18 and the right sill beam 18'. This increases the space between the left side surface of the right sill beam 18' and the right side surface of the left sill beam 18 to accommodate the battery pack 2, facilitating a larger size design for the battery pack 2 in the left-right direction. This arrangement, on the one hand, increases the size of the battery pack 2 in the Y direction, thereby increasing its capacity and further improving the driving range of the vehicle 100; on the other hand, the battery pack 2 can also participate in force transmission, improving the safety performance of the vehicle 100. During a side collision, when the left sill beam 18 and the right sill beam 18' are subjected to force, the battery pack 2 participates in the collision force transmission, thus improving the safety performance of the vehicle 100.

[0057] In some embodiments, such as Figure 2 As shown, the lower vehicle body 1 includes a left sill beam 18 and a right sill beam 18' arranged opposite each other in the width direction of the vehicle body. The front end face of the battery pack 2 extends beyond the front end faces of the left sill beam 18 and the right sill beam 18' in the length direction of the vehicle 100. This arrangement results in a larger X-axis dimension for the battery pack 2, facilitating force transmission with the front subframe 3. Of course, in other embodiments, the front end face of the battery pack 2 may be flush with the front end faces of the left sill beam 18 and the right sill beam 18' in the length direction of the vehicle 100; this is not a limitation.

[0058] In some embodiments, such as Figure 2 and Figure 4As shown, the lower vehicle body 1 also includes a front crossbeam 7. A left sill beam 18 and a right sill beam 18' are arranged opposite each other in the width direction of the vehicle body; the extension length of the front crossbeam 7 in the width direction is greater than the distance from the inner surface of the left sill beam 18 to the inner surface of the right sill beam 18'. Here, "the inner surface of the left sill beam 18" refers to the right side surface of the left sill beam 18, and "the inner surface of the right sill beam 18" refers to the left side surface of the right sill beam 18. The projections of the front ends of the left sill beam 18 and the right sill beam 18' in the width direction overlap with the projection of the front crossbeam 7 in the width direction. That is, the front ends of the left and right front sill beams can extend to the front crossbeam 7 in the X direction.

[0059] Therefore, the left and right front sill beams can participate in force transmission during a frontal collision of vehicle 100, thereby improving the safety performance of vehicle 100. Simultaneously, the left and right front sill beams can be respectively positioned on the left and right sides of the battery pack 2 to protect it. Furthermore, the left and right front sill beams, battery pack 2, and right front sill beams can participate in force transmission during a side collision of vehicle 100, thereby improving safety performance.

[0060] In some embodiments, such as Figure 4 and Figure 5 As shown, the lower body 1 also includes a front crossbeam 7 and opposing A-pillars 6, with both ends of the front crossbeam 7 connected to the A-pillars 6. Therefore, when the vehicle 100 experiences a frontal collision, the force transmitted to the front crossbeam 7 can be transferred to the A-pillars 6 through the left and right ends of the front crossbeam 7, improving the load-bearing capacity of the front end of the vehicle 100 and further enhancing the safety of the vehicle 100. Simultaneously, the two A-pillars 6, located on the left and right sides of the lower body 1, can mitigate the impact force on the vehicle 100 when it is subjected to collisions from the left and right sides, improving the load-bearing capacity of the lower body 1 and further enhancing the safety of the vehicle 100.

[0061] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the lower body 1 also includes a front longitudinal beam 5, which is connected to a front crossbeam 7 to transmit the front impact force to the front crossbeam 7. For example, the front longitudinal beam 5 may include a left front longitudinal beam 501 and a right front longitudinal beam 501'. The two front longitudinal beams 5 can be located at both ends of the front side of the front crossbeam 7 and connected to the front crossbeam 7. This allows the force transmitted to the front longitudinal beam 5 when the front side of the vehicle 100 is involved in a collision to be transmitted to the front crossbeam 7 through the end of the front longitudinal beam 5 connected to the front crossbeam 7, and the front impact force is transmitted to the width direction of the vehicle crossbeam through the crossbeam. This reduces the front impact force on the front side of the vehicle 100 when it is involved in a collision, strengthens the structural stability of the vehicle 100, improves the load-bearing capacity of the front end of the vehicle 100, and further improves the safety performance of the vehicle 100.

[0062] In some embodiments, reference Figure 2 and combined Figure 4 The rear side of the front longitudinal beam 5 includes an upper force transmission structure and a lower force transmission structure. The rear end of the upper force transmission structure is connected to the front cross beam 7, and the bottom surface of the rear end of the lower force transmission structure is vertically spaced from the battery pack 2 to form a sealing gap. Here, the "sealing gap" refers to the mounting surface where the upper surface of the battery pack 2 and the bottom surface of the lower vehicle body 1 are sealed together.

[0063] The rear end of the upper force transmission structure of the front longitudinal beam 5 is connected to the front cross beam 7 (e.g., lap joint). When the vehicle 100 is involved in a frontal collision, a portion of the impact force transmitted to the front longitudinal beam 5 can be transmitted to the front cross beam 7 through the connection between the rear end of the upper force transmission structure of the front longitudinal beam 5 and the front cross beam 7. The front cross beam 7 then transmits the front impact force to both sides of the vehicle 100 in the width direction. The other portion of the front impact force transmitted to the front longitudinal beam 5 can be transmitted rearward through the rear end of the lower force transmission structure of the front longitudinal beam 5. This mitigates the front impact force on the front side of the vehicle 100 during a collision, enhances the structural stability of the vehicle 100, improves the load-bearing capacity of the front end of the vehicle 100, and further enhances the safety of the vehicle 100. Simultaneously, the bottom surface of the rear end of the lower force transmission structure of the front longitudinal beam 5 is parallel to the top surface of the battery pack 2, which facilitates the installation of a seal between the bottom surface of the rear end of the lower force transmission structure and the battery pack 2.

[0064] like Figure 4 As shown, the rear bottom surface of the front longitudinal beam 5 is parallel to the top surface of the battery pack 2, and they are spaced apart in the vertical direction to form a sealing gap. A sealing structure can be provided between the lower side of the front longitudinal beam 5 and the top surface of the battery pack 2. On the one hand, this prevents the rear bottom surface of the front longitudinal beam 5 from interfering with the top surface of the battery pack 2, preventing the rear bottom surface of the front longitudinal beam 5 from causing obstruction during the installation of the battery pack 2. At the same time, it can raise the installation position of the battery pack 2, thereby increasing the chassis height of the vehicle 100, improving the passability of the vehicle 100, reducing the overall vehicle height, and increasing the interior space. On the other hand, it facilitates the transmission of force from the front longitudinal beam 5 to the left and right sides in the width direction, facilitating the transmission and dispersion of force, and improving the safety performance of the vehicle 100.

[0065] In some embodiments, such as Figure 2 , Figure 4As shown, the lower vehicle body 1 also includes a front longitudinal beam 5. The rear end bottom surface of the front longitudinal beam 5 and the top surface of the battery pack 2 are vertically spaced to form a sealing gap. A sealing structure is suitable for being installed between the rear end bottom surface of the front longitudinal beam 5 and the top surface of the battery pack 2. This arrangement prevents the rear end bottom surface of the front longitudinal beam 5 from interfering with the top surface of the battery pack 2, preventing the rear end bottom surface of the front longitudinal beam 5 from obstructing the installation of the battery pack 2. At the same time, it can raise the installation position of the battery pack 2, thereby increasing the chassis height of the vehicle 100 and improving the passability of the vehicle 100. In addition, it facilitates the transmission of force. Furthermore, the rear end bottom surface of the front longitudinal beam 5 is parallel to the top surface of the battery pack 2, which facilitates the installation of a seal between the rear end bottom surface of the front longitudinal beam 5 and the battery pack 2.

[0066] In some embodiments, reference Figure 3 and combined Figure 4 The lower force transmission structure is connected to the sill beam and the central passage 4. The front longitudinal beam 5 may include a left front longitudinal beam 501 and a right front longitudinal beam 501'. The lower end of the left front longitudinal beam 501 is connected to the left sill beam 18, and the lower end of the right front longitudinal beam 501' is connected to the left side of the right sill beam 18'. At least a portion of the left front longitudinal beam 501 and the right front longitudinal beam 501' can be connected to the central passage 4. This arrangement allows a portion of the front impact force to be transmitted to the left front longitudinal beam 501 and the right front longitudinal beam 501' to the right sill beam 18', and then through the left sill beam 501'. The left sill beam 18 and the right sill beam 18' transmit the frontal impact force along the length of the vehicle 100. Another part of the frontal impact force can be transmitted to the central passage 4 through the lower ends of the left front longitudinal beam 501 and the right front longitudinal beam 501'. When the vehicle 100 is hit on the left or right side, at least part of the side impact force can be transmitted to the battery pack 2 through the left sill beam 18 and the right front longitudinal beam 501'. This arrangement can further alleviate the force on the vehicle 100 when it is hit on the left, right and front sides, thereby improving the load-bearing capacity of the vehicle 100 and further improving the safety of the vehicle 100.

[0067] Furthermore, such as Figure 3 As shown, the lower body 1 may also include a front seat front crossbeam 16. The left and right ends of the front seat front crossbeam 16 are connected to the right side of the left sill beam 18 and the left side of the right sill beam 18', respectively. The front side of the front seat front crossbeam 16 can be connected to the rear end of the central tunnel 4. When a portion of the front impact force is transmitted to the rear end of the central tunnel 4, it can be transmitted to the width direction of the vehicle 100 through the front seat front crossbeam 7, thereby further mitigating the force experienced by the vehicle 100 when it is hit in a frontal collision, thereby improving the load-bearing capacity of the vehicle 100 and further improving the safety of the vehicle 100.

[0068] In some embodiments, refer to Figure 4 and combined Figure 5The lower force transmission structure is a herringbone structure. Both front longitudinal beams 5 include: a first connecting segment 502, a second connecting segment 503, and a third connecting segment 504. The rear end of the first connecting segment 502 is connected to the front end of the second connecting segment 503 and the front end of the third connecting segment 504. In the front-to-back direction, the front end of the second connecting segment 503 is connected to the front end of the third connecting segment 504, and the rear end of the second connecting segment 503 and the rear end of the third connecting segment 504 gradually move away from each other. That is, the first connecting segment 502, the second connecting segment 503, and the third connecting segment 504 can jointly construct a herringbone structure.

[0069] Among them, reference Figure 4 The second connecting segment 503 is located outside the third connecting segment 504 and is connected to the A-pillar 6. The bottom surfaces of the second connecting segment 503 and the third connecting segment 504 are in the same plane to facilitate the transmission and dispersion of forces on both sides. Furthermore, the bottom surfaces of the second connecting segment 503 and the third connecting segment 504 are adapted to be parallel to the battery pack 2, so that the battery pack 2 can extend to the bottom surfaces of the second connecting segment 503 and the third connecting segment 504. The lower surface of the second connecting segment 503 may have at least one mounting point (not shown in the figure). The front end of the battery pack 2 can extend to the mounting point of the second connecting segment 503 and be fixedly connected to the front longitudinal beam 5 through the mounting point, allowing the battery pack 2 to participate in the transmission of forces, thereby mitigating the forces experienced by the vehicle 100 in a frontal collision, further improving the load-bearing capacity of the vehicle 100, and ensuring improved safety of the vehicle 100.

[0070] The left end of the lower force transmission structure of the left front longitudinal beam 501 can be connected to the A-pillar 6 on the left side of the lower body 1, and the right end of the lower force transmission structure of the right front longitudinal beam 501' can be connected to the A-pillar 6 on the right side of the lower body 1. The front longitudinal beam 5 is configured in this way so that when the front side of the vehicle 100 is hit by a collision, the front impact force is transmitted to the front longitudinal beam 5 and then transmitted to the rear through the herringbone structure, gradually increasing the force-bearing area at the rear end of the front longitudinal beam 5, avoiding the concentrated force of the front impact force, mitigating the impact of the front impact force on the vehicle 100, improving the load-bearing capacity of the vehicle 100, and improving the safety of the vehicle 100. At the same time, by connecting the lower force transmission structure of the front longitudinal beam 5 to the A-pillar 6 of the lower body 1, the front impact force is further transmitted to the A-pillar 6, further mitigating the force on the front side of the vehicle 100 when it is hit by a collision, further improving the load-bearing capacity of the vehicle 100, and ensuring the safety of the vehicle 100.

[0071] In some embodiments, such as Figure 4 and Figure 5As shown, the front longitudinal beam 5 includes a left front longitudinal beam 501 and a right front longitudinal beam 501' spaced apart in the left-right direction of the vehicle 100. A bottom crossbeam 14 is connected between the left front longitudinal beam 501 and the right front longitudinal beam 501'. The bottom surface of the bottom crossbeam 14 and the top surface of the battery pack 2 are spaced apart in the vertical direction to form a gap. On the one hand, this can leave a sealing space, and on the other hand, it can prevent the bottom crossbeam from blocking the battery pack 2 from extending forward, thereby increasing the battery pack capacity. The bottom crossbeam 14 can be set behind the left front longitudinal beam 501 and the right front longitudinal beam 501', and both ends of the bottom crossbeam 14 can be connected to the left front longitudinal beam 501 and the right front longitudinal beam 501' respectively. The left front longitudinal beam 501 and the right front longitudinal beam 501', in this way, when the front end of the vehicle 100 is hit by a collision, when the front impact force is transmitted to the rear end of the left front longitudinal beam 5 and the right front longitudinal beam 5, the impact force can be guided to be transmitted in the width direction of the vehicle 100 through the bottom crossbeam 14, thereby playing a role in mitigating and dispersing the front impact force, improving the load-bearing capacity of the front end of the vehicle 100, and further improving the safety of the vehicle 100.

[0072] The bottom surface of the bottom crossbeam 14 and the top surface of the battery pack 2 are vertically spaced to form a gap. This arrangement prevents the bottom surface of the bottom crossbeam 14 from interfering with the top surface of the battery pack 2, allowing the front end of the battery pack 2 to extend forward. This increases the installation space of the battery pack in the X direction and avoids the bottom surface of the bottom crossbeam 14 obstructing the installation of the battery pack 2, thus improving the assembly speed of the vehicle 100 and facilitating automated production. It also increases the chassis height of the vehicle 100, improving its passability. Furthermore, the rear end bottom surface of the front longitudinal beam 5 is parallel to the top surface of the battery pack 2, facilitating the installation of a seal between the rear end bottom surface of the front longitudinal beam 5 and the battery pack 2.

[0073] In some embodiments, the projections of the front ends of the left sill beam 18 and the right sill beam 18' in the width direction overlap with the projection of the bottom crossbeam 14 in the width direction. That is, the bottom crossbeam 14 protrudes beyond the front ends of the left sill beam 18 and the right sill beam 18' in the front-rear direction. Thus, extending the bottom crossbeam forward can further increase the installation space of the battery pack in the X direction of the vehicle 100.

[0074] In some embodiments, such as Figure 1 and Figure 6 As shown, the vehicle 100 also includes a rear subframe 8, which is connected to the lower body 1. The front end face of the rear subframe 8 forms a limiting surface for the rearward extension of the battery pack 2.

[0075] In other words, the battery pack 2 can extend to the front end of the rear subframe 8. This arrangement increases the X-axis dimension of the battery pack 2, improving space utilization. Furthermore, because the battery pack 2 extends to the rear subframe 8, in the event of a rear-end collision, in addition to the force transmission of the front longitudinal beam 5, the battery pack 2 can also act as a force transmission structure. The front end of the rear subframe 8 forms a limiting surface for the rearward extension of the battery pack 2. When the vehicle 100 is in normal driving, the front end of the rear subframe 8 and the rear end of the battery pack 2 are spaced apart. If a rear-end collision occurs with the vehicle 100, the rear subframe 8, after being subjected to force, will move forward and contact the rear end of the battery pack 2, allowing the battery pack 2 to participate in force transmission. Therefore, the battery pack 2 can resist and disperse force transmission, thereby improving the safety performance of the vehicle 100.

[0076] Therefore, on the one hand, the X-axis dimension of the battery pack 2 can be increased, improving space utilization and further enhancing the range of the vehicle 100; on the other hand, the battery pack 2 can play a role in resisting and dispersing force transmission, thereby improving the safety performance of the vehicle 100.

[0077] For example, such as Figure 6 As shown, the minimum distance between the front surface of the rear subframe 8 and the rear surface of the battery pack 2 is d2, which satisfies: 15mm ≤ d2 ≤ 30mm. For example, d2 = 20mm. This serves two purposes: firstly, it prevents excessive distance between the rear end face of the battery pack 2 and the front surface of the rear subframe 8, ensuring sufficient placement space for the battery pack 2 in the X direction; secondly, it facilitates contact between the rear subframe 8 and the battery pack 2 for force transmission. Furthermore, the fact that the front surface of the rear subframe 8 and the battery pack 2 are not directly connected and are spaced apart during battery pack 2 installation facilitates installation, increases the assembly speed of the vehicle 100, and avoids interference between the rear end face of the battery pack 2 and the front surface of the rear subframe 8 during installation or vehicle 100 operation.

[0078] In some embodiments, reference Figure 4 and combined Figure 7The lower body 1 also includes a central crossbeam 11 and two spaced-apart rear longitudinal beams 9. The central crossbeam 11 extends along the width direction of the vehicle 100 and connects to the rear longitudinal beams 9 and the sill beams. The central crossbeam 11 is located at the rear of the lower body 1, and its two ends extending along the width direction of the vehicle 100 are connected to the left sill beam 18 and the right sill beam 18', respectively. At least a portion of the rear side of the central crossbeam 11 can be located below the front end of the rear longitudinal beams 9. Thus, the left sill beam 18 and the right sill beam 18' can extend to the central crossbeam 11, and can participate in force transmission during a rear-end collision of the vehicle 100, thereby improving the safety performance of the vehicle 100. Simultaneously, the left sill beam 18 and the right sill beam 18' can be respectively positioned on the left and right sides of the battery pack 2 to protect the battery pack 2. Furthermore, the left sill beam 18, the battery pack 2, and the right sill beam 18' can participate in force transmission during a side-end collision of the vehicle 100, thereby improving safety performance.

[0079] In some embodiments, such as Figure 7 As shown, the central crossbeam 11 is formed as a battery pack mounting beam. That is, the rear end of the battery pack 2 can be mounted on the central crossbeam 11. The lower surface of the central crossbeam 11 and the top surface of the battery pack 2 are vertically spaced to form a sealing gap. A sealing structure is suitable for being installed between the lower surface of the central crossbeam 11 and the top surface of the battery pack 2. This arrangement prevents the lower surface of the central crossbeam 11 from interfering with the top surface of the battery pack 2, preventing obstruction during battery pack 2 installation. It also increases the X-axis dimension of the battery pack 2, thereby increasing the chassis height of the vehicle 100 and improving its passability. Furthermore, the lower surface of the central crossbeam 11 is parallel to the top surface of the battery pack 2, which facilitates the installation of a seal between the lower surface of the central crossbeam 11 and the battery pack 2.

[0080] In some embodiments, such as Figure 7 , Figure 18As shown, subframe mounting seats 15 are spaced apart on the central crossbeam 11. The subframe mounting seats 15 are located on the rear side of the sill beam along the length of the vehicle 100. Thus, on the one hand, the subframe mounting seats 15 can be formed into a cage structure, and the subframe mounting seats 15 cover at least the outer periphery of the rear part of the battery pack 2 in the left and right directions, so as to at least protect the rear side of the battery pack 2. For example, the upper rear surface of the battery pack 2 is spaced apart from the subframe mounting seat 15 in the height direction, so that other components can be accommodated in the space, making reasonable use of space. It can be understood that the subframe mounting seat 15 is located on the rear side of the connection between the middle crossbeam 11 and the battery pack 20. The subframe mounting seat 15 is configured in this way so that when the subframe is subjected to a collision force, the force can be transferred to the subframe mounting seat 15, and then to the middle crossbeam 11, and can be further transferred to the battery pack 20, thereby forming an effective force transmission path. Furthermore, the battery pack 20 and the middle crossbeam 11 can form a new force transmission path. By utilizing the large area of ​​the battery pack 20, damage to the vehicle structure during the force transmission process can be effectively reduced.

[0081] In some embodiments, reference Figure 9 and combined Figure 10 The left sill beam 18 includes a left sill housing 1801 and a left sill reinforcing beam 1802 disposed within the left sill housing 1801. The right sill beam 18' includes a right sill housing (not shown) and a right sill reinforcing beam (not shown) disposed within the right sill housing.

[0082] The following description uses the left sill beam 18 as an example. The left sill beam 18 is located on the left side of the lower vehicle body 1 and extends along the length of the vehicle 100. The left sill beam 18 includes a left sill housing 1801 and a left sill reinforcing beam 1802 disposed within the left sill housing 1801. The left sill housing 1801 may include a left sill housing 18011 and a right sill housing 18011'. The left sill reinforcing beam 1802 may have at least one cavity 18021 that extends through the left sill reinforcing beam 1802 in the front-rear direction. The left sill reinforcing beam is disposed within the receiving cavity jointly constructed by the left sill housing 18011 and the right sill housing 18011'. The upper surface of the left sill and left shell 18011 has a left upper flange 18012', and the lower surface of the left sill and left shell 18011 has a left lower flange 18013'. The upper surface of the right shell 18011' has a right upper flange 18012, and the lower surface of the right shell 18011' has a right lower flange 18013. The left upper flange 18012' and the right upper flange 18012 are fitted together in the width direction, and the left lower flange 18013' and the right lower flange 18013 are fitted together in the width direction to improve the structural stability of the left sill beam 18 and further improve the load-bearing capacity of the left sill shell 1801.

[0083] The left side sill reinforcement beam 1802 is arranged in the left side sill housing 1801, at least part of the left side sill reinforcement beam 1802 can be connected to at least one of the left housing 18011 of the left side sill and the right housing 18011' of the left side sill. The left side sill reinforcement beam 1802 arranged in this way can improve the load-bearing capacity of the left side sill beam 18, so that when the vehicle 100 is collided from the left side, the left side sill reinforcement beam 1802 can protect the lower vehicle body 1, and the safety of the vehicle 100 is improved.

[0084] Further, there may be a plurality of cavity 18021, the plurality of cavities 18021 penetrate the left side sill reinforcement beam 1802 in the front-rear direction, and the cross-section of the plurality of cavities 18021 in the front-rear direction may be in a "field" shape. The left side sill reinforcement beam 1802 arranged in this way can reduce the material and weight of the left side sill reinforcement beam 1802, which is easy to realize the lightweight design of the vehicle 100.

[0085] The side sill beam can realize an upper-middle-lower "sandwich" type side protection structure. Specifically, taking the left side sill as an example, after the left side sill beam 18 is stressed, the left side sill beam 18 can conduct upper-layer side force transmission from the upper battery pack housing 2011 on the upper part of the battery pack 2, transmit the force from the left side sill reinforcement beam 1802 to the left extension portion 20111 and then to the battery cell 202 to form a middle-layer side force transmission structure, and transmit the force from the left side sill beam 18 to the left side sill beam 18 and then to the bottom plate of the battery pack 2 to form a lower-layer side force transmission structure. Thereby forming the upper-middle-lower "sandwich" type side protection structure, which can better protect the safety of vehicle occupants.

[0086] For example, as Figure 9 shown, the left side sill reinforcement beam 1802 and the right side sill reinforcement beam are respectively aluminum alloy profiles. By arranging the left side sill reinforcement beam 1802 and the right side sill reinforcement beam as aluminum alloy profiles, the weight of the left side sill reinforcement beam 1802 and the right side sill reinforcement beam can be further reduced while ensuring the stiffness, torsional strength and load-bearing capacity of the left side sill reinforcement beam 1802 and the right side sill reinforcement beam, which is easy to realize the lightweight design of the vehicle 100. Meanwhile, the fitting degree with the battery pack 2 is good, and the force transmission effect is good.

[0087] In some embodiments, as Figure 9 , Figure 10 and Figure 11 shown, the battery pack 2 comprises 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 an accommodation space 2013, the at least one battery cell 202 is arranged in the accommodation space 2013, and at least part of the upper surface of the upper battery pack housing 2011 is formed as a vehicle body floor, so the present application can omit at least part of the vehicle body floor in the prior art.

[0088] The battery pack 2 in this application omits the vehicle floor setting in the prior art, and uses at least the upper surface of the battery pack 2 to form the vehicle floor, thereby improving the space utilization of the vehicle 100, expanding the passenger space, reducing the overall vehicle height, improving the passability of the vehicle 100, and simplifying the structure of the vehicle 100 and improving assembly efficiency.

[0089] The battery pack upper housing 2011 may have a left extension 20111 and a right extension 20111' on both sides in the width direction. The left extension 20111 may have a plurality of left connecting holes (not shown in the figure) spaced apart along the length direction of the vehicle 100, and the right extension 20111' may have a plurality of right connecting holes (not shown in the figure) spaced apart along the length direction of the vehicle 100. The left connecting holes and the right connecting holes may be connected in the vertical direction, and a connecting bolt 19 may be provided in each left connecting hole and the right connecting hole. The battery pack upper housing 2011 may be connected to the left sill beam 18 and the right sill beam 18' through the connecting bolt 19.

[0090] The following explanation uses the connection between the left extension 20111 and the left sill beam 18 as an example. The left sill housing 1801 of the left sill beam 18 can be provided with a left sill connection hole (not shown in the figure) that runs through the vertical direction at a position corresponding to the left connection hole. The connecting bolt 19 can be inserted into the left sill connection hole of the left sill housing 1801 and the left connection hole of the left extension 20111. This can improve the connection stability between the left sill beam 18 and the upper housing 2011 of the battery pack. At the same time, the battery pack 2 can be used as a load-bearing component, so that when the vehicle 100 is hit by a collision on the left, the side impact force can be transmitted from the left sill beam 18 to the battery pack 2, which can alleviate the force on the vehicle 100 when it is hit by a collision on the left, avoid the vehicle 100 from undergoing large deformation after being hit by the side impact force, further improve the load-bearing capacity of the vehicle 100, and improve the safety of the vehicle 100.

[0091] A space 2013 is formed between the upper housing 2011 and the lower housing 2012 of the battery pack, which can accommodate at least one battery cell 202. The upper and lower housings can jointly protect the battery cell 202, thereby increasing the number of battery cells 202 that the battery pack 2 can accommodate, increasing the total capacity of the battery pack 2, and further improving the driving range of the vehicle 100.

[0092] At least a portion of the upper surface of the battery pack housing 2011 is formed as the vehicle floor, allowing the housing space 2013 of the battery pack 2 to extend upwards, further expanding the installation space of the battery pack 2, further increasing the capacity of the battery pack 2, improving the power of the battery pack 2, further improving the range of the vehicle 100, while saving materials, reducing the total weight of the vehicle 100, and facilitating the lightweight design of the vehicle 100.

[0093] In some embodiments, such as Figure 11 As shown, the battery cell 202 is fixedly connected to the upper housing 2011 of the battery pack. Therefore, the space occupied by the battery pack 2 in the Z-direction can be further reduced, the space utilization rate in the Z-direction can be improved, and the installation reliability of the battery cell 202 and the upper housing 2011 of the battery pack can be improved. Furthermore, as... Figure 12 As shown, the top surface of the battery cell 202 is bonded to the upper cover with structural adhesive 203. This not only further reduces the space occupied by the battery pack 2 in the Z direction, but also helps to reduce the gap between the battery cell 202 and the upper shell, improving the compactness between the battery cell 202 and the upper shell. This prevents the battery cell 202 from detaching from the upper shell due to the large gap between the battery cell 202 and the upper shell acting as the vehicle floor. At the same time, the upper shell 2011 can transmit force, improving the strength of the upper shell 2011 and enhancing its modal characteristics.

[0094] In some embodiments, such as Figure 11 As shown, the lower housing 2012 of the battery pack serves as a cooling plate, and the bottom surface of the battery cell 202 is bonded to the base plate via thermally conductive adhesive 204. The cooling plate of the battery pack 2, acting as the lower housing, cools the battery cell 202. The bottom surface of the battery cell 202 is bonded to the base plate via thermally conductive adhesive 204. This configuration of the lower housing 2012 allows heat from the battery cell 202 to be conducted through the thermally conductive adhesive 204 to the lower housing 2012 for cooling, thereby reducing the temperature inside the battery pack 2. This avoids the danger caused by overheating of the battery cell 202 within the battery pack 2, improving the safety and reliability of the battery pack 2, and further enhancing the safety of the vehicle 100. Simultaneously, it increases the integration of the battery pack 2 and improves its energy density.

[0095] Meanwhile, since the battery cell 202 is connected to the upper casing 2011 of the battery pack, the lower casing 2012 of the battery pack is not subjected to stress. Therefore, a cooling plate can be used instead of the lower casing 2012, eliminating the need for a battery pack base plate and reducing the weight of the battery pack 2. In addition, the cooling plate also protects the battery pack 2, thereby improving its safety and reliability and further enhancing the safety of the vehicle 100.

[0096] In some embodiments, such as Figure 10 , Figure 11 and 16As shown, the battery pack 2 may include at least one battery cell 202, the length direction of which is the length direction of the vehicle 100. At least one battery cell 202 is disposed within the housing space 2013 of the battery pack 2, and the length direction of the battery cell 202 is set along the length direction of the vehicle 100. This increases the number of battery cells 202 arranged along the width direction, improves the space utilization of the battery pack 2, increases the number of battery cells 202 that the battery pack 2 can accommodate, and improves the driving range of the vehicle 100.

[0097] Furthermore, such as Figure 10 and Figure 11 As shown, the battery pack 2 includes multiple battery cells 202 arranged side-by-side along the width direction of the vehicle 100. The main expansion surface of the battery cell 202 (i.e., the surface with the largest area on its outer surface) faces the width direction of the vehicle 100. This facilitates the battery cell 202's participation in force transmission during a side impact of the vehicle 100, and also improves the space utilization of the battery pack 2, increasing the number of battery cells 202 that the battery pack 2 can accommodate, thereby increasing the total capacity of the battery pack 2 and further improving the driving range of the vehicle 100. For example, the main expansion surface of the battery cell 202 can be placed close to the upper housing 2011 of the battery pack. This arrangement increases the force transmission area, thereby reducing pressure and further improving the force transmission effect.

[0098] In some embodiments, such as Figure 12 As shown, the lower body 1 is equipped with a sealing plate assembly 20, and the upper surface of the battery pack 2 is sealed to the sealing plate assembly 20. This improves the sealing reliability between the battery pack 2 and the passenger compartment, preventing dust and other impurities from entering the lower side of the lower body 1 from the upper surface of the battery pack 2. The sealing plate assembly 20 is mounted on the vehicle body, and the gap between it and the battery pack 2 is a sealing gap. The sealing plate assembly provides a flat surface for easy sealing with the battery pack. This design of the sealing plate assembly 20 facilitates sealing the upper side of the battery pack, ensuring sealing reliability while also facilitating vehicle assembly.

[0099] In some embodiments, reference Figure 9 and combined Figure 13The sealing plate assembly 20 includes an annular sealing plate 2001 and at least one sealing element 2002, which is disposed between the sealing plate 2001 and the battery pack 2. The sealing element 2002 can be annular or there can be two sealing elements 2002, sealing between the sealing plate 2001 and the battery pack 2. One of two adjacent sealing elements 2002 is located on the outer periphery of the other sealing element 2002, and the two sealing elements 2002 are spaced apart in the inward and outward directions. The sealing element 2002 can be, for example, a sealing sponge or a sealing strip. The two sealing elements 2002 deform under pressure, achieving reliable sealing. Improving the fit of a single sealing element 2002 further enhances the sealing effect of the sealing plate 2001, blocking water and air from both sides of the sealing strip.

[0100] For example, the sealing plate 2001 may include a plurality of sub-sealing plates 2001 connected in sequence. The plurality of sub-sealing plates 2001 may be welded together or the sealing plate 2001 may be manufactured by stamping a whole piece of steel plate. The integral molding can further improve the sealing performance of the sealing plate 2001.

[0101] Furthermore, such as Figure 9 As shown, the sealing plate 2001 has a first flat portion 2001a, and the battery pack 2 has a second flat portion 2014. The first flat portion 2001a and the second flat portion 2014 are opposite to each other, and a sealing member 2002 is disposed between the first flat portion 2001a and the second flat portion 2014. The first flat portion 2001a and the second flat portion 2014 are disposed opposite to each other, and at least one sealing member 2002 is affixed between the first flat portion 2001a and the second flat portion 2014, thereby further improving the sealing effect of the sealing plate 2001, enhancing the sealing performance of the lower vehicle body 1, and further improving passenger comfort.

[0102] Optionally, the seal 2002 is a foam component. The foam component can be made of EVA (Ethylene Vinyl Acetate) or EPE (Expandable Polyethylene) materials. Foam components are lightweight, deformable, and have good sound insulation and heat insulation properties. They can improve the heat insulation of the sealing plate 2001, preventing heat transfer upwards after the battery pack 2 heats up, thus improving the safety and reliability of the battery pack 2 and further enhancing the safety of the vehicle 100. Simultaneously, the foam component can improve the sound insulation, water insulation, and air insulation of the vehicle 100, further enhancing passenger comfort. The foam component can have a certain sealing compression to further ensure the sealing effect. The foam can be bonded to the battery pack 2.

[0103] In some embodiments, such as Figure 9 , Figure 10 , Figure 14 and Figure 15 As shown, a left sill beam 18 is provided on the left side of the lower vehicle body 1, and a right sill beam 18' is provided on the right side of the lower vehicle body 1; the sealing plate 2001 includes a left sealing plate segment 2001b and a right sealing plate segment 2001b', the left sealing plate segment 2001b has a first flat portion 2001a, the left end of the left sealing plate segment 2001b has a left flange 2001c, and the first flat portion 2001a of the left sealing plate segment 2001b is connected to the left flange 2001c. The left sealing plate segment 2001b is connected to the left sill beam 18 via a left flange 2001c. The right sealing plate segment 2001b' has a first flat portion 2001a, and its right end has a right flange 2001c'. The first flat portion 2001a of the right sealing plate segment 2001b' is connected to the right flange 2001c', and the right sealing plate segment 2001b' is connected to the right sill beam 18' via the right flange 2001c'. The left sill beam 18 may include the left sill beam 18, and the right sill beam 18' may include the right sill beam 18'. The left sealing plate segment 2001b is connected to the left sill beam 18 via the left flange 2001c, and the right sealing plate segment 2001b' is connected to the right sill beam 18' via the right flange 2001c'.

[0104] The following explanation uses the connection between the left sill beam 18 and the left sealing plate segment 2001b as an example. The left end of the left sealing plate segment 2001b has a left flange 2001c that bends downward. The left side of the left flange 2001c can be set opposite to the right side of the left sill beam 18, and at least a part of the left side of the left flange 2001c can be connected to the right side of the left sill beam 18. The left sealing plate segment 2001b set in this way improves the connection reliability between the sealing plate 2001 and the left sill beam 18, and can prevent the sealing plate 2001 from deviating from the sealing position due to the vibration of the vehicle 100 during driving. At the same time, it improves the sealing effect of the sealing plate 2001, further improves the sealing performance of the lower body 1, and can improve the comfort of passengers.

[0105] In some embodiments, such as Figure 13 and Figure 15As shown, the sealing plate 2001 also includes a front sealing plate section 2001d and a rear sealing plate section 2001f. The front sealing plate section 2001d is connected to the front longitudinal beam 5, and the rear sealing plate section 2001f is connected to the middle cross beam 11. The sealing plate 2001 may include a front sealing plate segment 2001d and a rear sealing plate segment 2001f. At least one side of the front sealing plate segment 2001d in the width direction may be provided with a front folded edge 2001e. The front sealing plate segment 2001d is connected to the front longitudinal beam 5 of the lower body 1 through the front folded edge 2001e. At least one side of the rear sealing plate segment 2001f in the width direction may be provided with a rear folded edge (not shown in the figure). The rear sealing plate segment 2001f is connected to the middle cross beam 11 of the lower body 1 through the rear folded edge. The front sealing plate segment 2001d and the rear sealing plate segment 2001f configured in this way improve the connection reliability between the sealing plate 2001 and the lower body 1, prevent the sealing plate 2001 from deviating from the sealing position due to vibration during vehicle 100 operation, improve the sealing effect of the sealing plate 2001, further improve the sealing performance of the lower body 1, and enhance passenger comfort.

[0106] In some embodiments, reference Figure 12 , Figure 16 and combined Figure 17 The lower body 1 is provided with a seat crossbeam 13 extending in the width direction; the battery pack 2 is provided with a battery pack reinforcing beam 2015 extending in the width direction, and the battery pack 2 is connected to the seat crossbeam 13 through the battery pack reinforcing beam 2015. The lower body 1 may be provided with a seat crossbeam 13 extending in the width direction, and the seat is adapted to be set on the upper side of the seat crossbeam 13. The battery pack 2 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 2 is connected to the seat crossbeam 13 through the battery pack reinforcing beam 2015. This can improve the connection reliability between the battery pack 2 and the lower body 1, improve the safety of the vehicle, and at the same time, when the vehicle is hit on the left or right side, the side impact force can be transmitted along the width direction of the vehicle through the reinforcing beam, thereby reducing the effect of the side impact force and avoiding large deformation of the vehicle 100 after being hit by the side impact force, thereby improving the load-bearing capacity of the vehicle 100 and further improving the safety of the vehicle 100. The annular edge of the upper surface of the battery pack 2 and the battery pack reinforcing beam 2015 can be bolted to the lower body 1 to ensure the reliability of the installation of the battery pack 2.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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; 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 front longitudinal beam, the rear end bottom surface of which is spaced vertically from the top surface of the battery pack to form a sealing gap. The lower vehicle body also includes a front crossbeam. The rear side of the front longitudinal beam includes an upper force transmission structure and a lower force transmission structure. The rear end of the upper force transmission structure is connected to the front crossbeam. The bottom surface of the rear end of the lower force transmission structure is spaced apart from the battery pack in the vertical direction to form a sealing gap. The bottom surface of the rear end of the lower force transmission structure is parallel to the top surface of the battery pack.

2. The vehicle according to claim 1, characterized in that, A sealing structure is provided between the bottom rear end of the front longitudinal beam and the top surface of the battery pack.

3. The vehicle according to claim 1, characterized in that, The lower force transmission structure is connected to the sill beam and the central passage.

4. The vehicle according to claim 1, characterized in that, The lower force transmission structure is a herringbone structure.

5. The vehicle according to claim 1, characterized in that, The front longitudinal beam includes a first connecting section, a second connecting section, and a third connecting section. The rear end of the first connecting section is connected to the front end of the second connecting section and the front end of the third connecting section. Along the longitudinal direction of the vehicle, the front end of the second connecting section and the front end of the third connecting section are connected, and the rear end of the second connecting section and the rear end of the third connecting section gradually move away from each other.

6. The vehicle according to claim 5, characterized in that, The lower body also includes two A-pillars arranged opposite each other, and the two A-pillars are respectively connected to both ends of the front crossbeam; The second connecting segment is located outside the third connecting segment. The second connecting segment is connected to the A-pillar. The bottom surface of the second connecting segment and the bottom surface of the third connecting segment are in the same plane.

7. The vehicle according to claim 5, characterized in that, The lower surface of the second connecting segment has at least one mounting point, and the battery pack extends to the mounting point of the second connecting segment and is fixedly connected to the front longitudinal beam through the mounting point.

8. The vehicle according to any one of claims 1-5, characterized in that, The lower body also includes a left sill beam and a right sill beam that are arranged opposite to each other in the width direction of the body, and the battery pack is connected to the left sill beam and the right sill beam; The front end face of the battery pack extends beyond the front end face of the left sill beam and the front end face of the right sill beam in the longitudinal direction of the vehicle, or The front end face of the battery pack is flush with the front end face of the left sill beam and the front end face of the right sill beam along the length of the vehicle.

9. The vehicle according to claim 1, characterized in that, The front longitudinal beam includes a left front longitudinal beam and a right front longitudinal beam spaced apart in the left-right direction of the vehicle. A bottom crossbeam connects the left front longitudinal beam and the right front longitudinal beam. The bottom surface of the bottom crossbeam is spaced apart from the top surface of the battery pack in the vertical direction.

10. The vehicle according to claim 1, characterized in that, The bottom surface of the rear end of the front longitudinal beam is parallel to the top surface of the battery pack.

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