vehicle

Abstract

The present invention discloses a vehicle (100) including a lower body (1), a front subframe (3), and a battery pack (2), the front subframe (3) being connected to the lower body (1), the battery pack (2) being connected to the lower body (1) and being provided on the lower side of the lower body (1), a rear end surface (31) of the front subframe (3) being formed as a stopper surface extending forward of the battery pack (2), and at least a part of the upper surface of the battery pack (2) being formed as a floor of the vehicle body. In the vehicle, by forming the rear end surface of the front subframe as a stopper surface extending forward of the battery pack, the dimension of the battery pack in the X 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 height of the vehicle can be reduced and the space utilization rate and the passenger space can be improved.

Description

Technical Field

[0001] (Cross - reference to Related Applications) This application claims the priority of a Chinese patent application with an application number of 202210346559.4 and a title of "Vehicle", which was filed with the China National Intellectual Property Administration on March 31, 2022, and all of its contents are incorporated herein by reference.

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

Background Art

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

Summary of the Invention

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

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

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

[0007] In some embodiments, the minimum distance between the front end surface of the battery pack and the rear end surface of the front subframe is d1, where d1 satisfies the condition 10mm ≤ d1 ≤ 100mm.

[0008] In some embodiments, the lower body includes a left side sill and a right side sill, the right side sill and the left side sill being arranged opposite each other in the width direction of the body, and the battery pack being connected to the left side sill and the right side sill so that the left side sill and the right side sill are formed as a battery pack mounting beam.

[0009] In some embodiments, the lower body includes a left side sill and a right side sill, the right side sill and the left side sill being arranged opposite each other in the width direction of the body, and in the longitudinal direction of the vehicle, the front end surface of the battery pack extends beyond the front end surface of the left side sill and the front end surface of the right side sill.

[0010] In some embodiments, the lower body includes a front cross member, a left side sill, and a right side sill, wherein the right side sill and the left side sill are arranged opposite each other in the width direction of the body, the extension length of the front cross member in the width direction of the body is greater than the distance from the inner surface of the left side sill to the inner surface of the right side sill, and the width direction projections of the front end surface of the left side sill and the front end surface of the right side sill overlap with the width direction projection of the front cross member.

[0011] In some embodiments, the lower body further includes a front cross member and an A-pillar, wherein the A-pillars are arranged opposite each other, and both ends of the front cross member are connected to the A-pillars.

[0012] In some embodiments, the lower body further includes a front side member, the front side member is connected to the front cross member, and the rear side of the front side member has 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 member, and the bottom surface of the rear end of the lower force transmission structure and the battery pack are spaced vertically apart to form a sealing gap.

[0013] In some embodiments, the lower force transmission structure is a V-shaped structure, or the lower force transmission structure is connected to the left side sill, the right side sill, and the center tunnel.

[0014] In some embodiments, the rear bottom surface of the lower force transmission structure is parallel to the top surface of the battery pack.

[0015] In some embodiments, the lower body further includes a front side member, wherein the rear bottom surface of the front side member and the top surface of the battery pack are spaced vertically apart to form a sealing gap, or the rear bottom surface of the front side member is parallel to the top surface of the battery pack.

[0016] In some embodiments, the front side member includes a left front side member and a right front side member spaced apart in the left-right direction of the vehicle, with a bottom cross member connected between the left front side member and the right front side member, the bottom surface of the bottom cross member and the top surface of the battery pack spaced apart in the vertical direction, and the bottom surface of the bottom cross member is parallel to the top surface of the battery pack.

[0017] In some embodiments, the vehicle further includes a rear subframe, which is connected to the lower body, and the front end surface of the rear subframe is formed as a stopper surface extending behind the battery pack.

[0018] In some embodiments, the lower body further includes a middle cross member and two rear side members, the two rear side members being spaced apart, and the middle cross member extending along the width direction of the vehicle and connecting to the rear side members, the left side sill, and the right side sill.

[0019] In some embodiments, the middle cross member is formed as the battery pack mounting beam, and the lower surface of the middle cross member and the top surface of the battery pack are spaced vertically apart to form a sealing gap, or the middle cross member is provided with subframe mounting seats spaced apart.

[0020] In some embodiments, the battery pack includes an upper battery pack housing, a lower battery pack housing, and at least one cell, wherein the upper battery pack housing and the lower battery pack housing form a housing space, at least one of the cells is provided in the housing space, and the upper surface of at least a portion of the upper battery pack housing is formed as the floor of the vehicle body.

[0021] In some embodiments, the cell is fixedly connected to the upper housing of the battery pack, and the top surface of the cell is bonded to the upper housing of the battery pack; or the lower housing of the battery pack is a cooling plate, and the bottom surface of the cell is bonded to the lower housing of the battery pack with a thermally conductive adhesive.

[0022] In some embodiments, the battery pack includes at least one cell, the longitudinal direction of which is the longitudinal direction of the vehicle, and the battery pack includes a plurality of such cells, the plurality of which are arranged side by side along the width direction of the vehicle.

[0023] In some embodiments, a sealing plate assembly is provided on the lower vehicle body, and the upper surface of the battery pack is hermetically connected to the sealing plate assembly.

[0024] In some embodiments, the sealing plate assembly is an annular sealing plate, the vehicle includes at least one sealing member, and the sealing member is provided between the annular sealing plate and the battery pack.

[0025] In some embodiments, the sealing plate has a first planar portion, the battery pack has a second planar portion, the first planar portion and the second planar portion face each other, the sealing member is provided between the first planar portion and the second planar portion, the sealing plate includes a left sealing plate section and a right sealing plate section, the left sealing plate section has a left flange at its left end, the left sealing plate section is connected to the left side sill by the left flange, the right sealing plate section has a right flange at its right end, the right sealing plate section is connected to the right side sill by the right flange, the sealing plate further includes a front sealing plate section and a rear sealing plate section, the front sealing plate section is connected to the front side member, and the rear sealing plate section is connected to the middle cross member. [[ID=十二]]

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

[0027] Additional aspects and advantages of the present disclosure will be shown in part in the following description, will become apparent in part from the following description, or will be understood by the implementation of the present disclosure.

[0028] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily understood by describing the embodiments with reference to the following drawings.

Brief Description of the Drawings

[0029] [Figure 1] It is a top view of the vehicle body structure according to an embodiment of the present disclosure. [Figure 2] It is a right side view of the front structure of the vehicle body according to an embodiment of the present disclosure. [Figure 3] It is a schematic view of a partial structure of the vehicle body according to an embodiment of the present disclosure. [Figure 4] It is a schematic view of the front structure of the vehicle body according to an embodiment of the present disclosure, showing the bottom surface of the front cross member. <00001,04>It is a bottom view of the front structure of the vehicle body according to an embodiment of the present disclosure. [Figure 6] It is a right side view of the rear structure of the vehicle body according to an embodiment of the present disclosure. [Figure 7] It is a schematic view of the rear structure of the vehicle body according to an embodiment of the present disclosure. [Figure 8] It is a cross-sectional view taken along the line A-A of FIG. 7. [Figure 9] It is a cross-sectional view of a partial structure of the vehicle body according to an embodiment of the present disclosure. [Figure 10] It is a cross-sectional view of a partial structure of the vehicle body according to an embodiment of the present disclosure. [Figure 11] It is an exploded view of the battery pack according to an embodiment of the present disclosure. [Figure 12] It is an exploded view of a partial vehicle body according to an embodiment of the present disclosure. [Figure 13] It is a schematic configuration diagram of the sealing plate assembly according to an embodiment of the present disclosure. [Figure 14] It is a cross-sectional view of the right sealing plate end according to an embodiment of the present disclosure. [Figure 15] It is a cross-sectional view of the front sealing plate end according to an embodiment of the present disclosure. [Figure 16] [[ID=,47]]It is a cross-sectional view of the battery pack according to an embodiment of the present disclosure. [Figure 17] It is a schematic configuration diagram of the sealing plate and the seat cross member according to an embodiment of the present disclosure. [Figure 18] It is a schematic view of the rear structure of the vehicle body according to an embodiment of the present disclosure.

Modes for Carrying Out the Invention

[0030] The embodiments of this disclosure will be described in detail below, and the embodiments described with reference to the drawings are illustrative. A vehicle 100 according to an embodiment of this disclosure will be described below with reference to Figures 1 to 18, and the vehicle 100 includes a lower body 1, a front subframe 3, and a battery pack 2. The X direction refers to the longitudinal direction of the vehicle 100, i.e., the front-rear direction, the Y direction refers to the width direction of the vehicle 100, i.e., the left-right direction, and the Z direction refers to the height direction of the vehicle 100, i.e., the up-down direction.

[0031] Specifically, as shown in Figures 1 and 2, the front subframe 3 is connected to the lower body 1, and the battery pack 2 is connected to the lower body 1 and is also provided on the underside of the lower body 1. The rear end surface 31 of the front subframe 3 is formed as a stopper surface that extends forward of the battery pack 2, meaning that the battery pack 2 can extend to the rear end surface 31 of the front subframe 3. This configuration increases the dimensions of the battery pack 2 in the X direction, improving space utilization, while also allowing the battery pack 2 to extend to the front subframe 3. Therefore, when a frontal collision occurs with the vehicle 100, in addition to force transmission by the front side members 5, the battery pack 2 can transmit force as a force transmission structure. The rear end surface 31 of the front subframe 3 is formed as a stopper surface that extends forward of the battery pack 2. When the vehicle 100 is running normally, the rear end surface 31 of the front subframe 3 and the front end surface 21 of the battery pack 2 are spaced apart. However, when a frontal collision occurs with the vehicle 100, the front subframe 3 moves backward after receiving the applied force and comes into contact with the front end surface 21 of the battery pack 2. As a result, the battery pack 2 participates in the transmission of force, and thus plays a role in withstanding and distributing the force, thereby improving the safety performance of the vehicle 100.

[0032] In conventional technology, the vehicle floor is generally made of sheet metal and is an important component for supporting and sealing the passenger compartment. The upper housing of the battery pack is generally made of aluminum, and the battery pack is fixedly mounted below the vehicle floor. The vehicle floor and the battery pack are designed separately and are two different components. Therefore, in the Z direction, an assembly gap must be retained between the vehicle floor and the battery pack, resulting in low space utilization and a high vehicle height.

[0033] In the vehicle 100 of this disclosure, the floor of the vehicle body in the prior art is omitted, and the floor of the vehicle body, for example, the front floor of the vehicle body, can be formed by utilizing at least the upper surface of the battery pack 2. By providing it in this way, the space utilization rate and passenger space of the vehicle 100 are improved, the height of the vehicle is reduced, the passability of the vehicle 100 is improved, the structure of the vehicle 100 is simplified, and the assembly efficiency is improved.

[0034] According to the vehicle 100 of the embodiment of this disclosure, by forming the rear end surface 31 of the front subframe 3 as a stopper surface extending forward of the battery pack 2, the dimensions of the battery pack 2 in the front-rear direction can be increased, improving the space utilization rate of the vehicle 100. Furthermore, by transmitting force through the battery pack 2 as a force transmission structure, the safety performance of the vehicle 100 can be improved. In addition, by forming at least a portion of the upper surface of the battery pack 2 as the floor of the vehicle body, the height of the vehicle can be reduced, improving the space utilization rate and passenger space of the vehicle 100.

[0035] In some embodiments, as shown in Figure 2, the minimum distance between the front end surface 21 of the battery pack 2 and the rear end surface 31 of the front subframe 3 is d1, where d1 satisfies 10mm ≤ d1 ≤ 100mm. For example, d1 = 50mm. When set in this manner, the front end surface 21 of the battery pack 2 and the rear end surface 31 of the front subframe 3 end surface 31By preventing the distance between them from becoming too large, the extension space of the battery pack 2 in the X direction can be increased, expanding the housing space for the battery pack 2, while the front subframe 3 can easily contact the battery pack 2 and transmit force. Furthermore, when installing the battery pack 2, the rear end surface 31 of the front subframe 3 and the battery pack 2 are not directly connected but are provided with a gap between them, making it easier to install the battery pack 2, improving the assembly speed of the vehicle 100, and avoiding interference between the front end surface 21 of the battery pack 2 and the rear end surface 31 of the front subframe 3 during installation or when the vehicle 100 is running.

[0036] In some embodiments, as shown in Figures 1 and 3, the lower body 1 further includes a left side sill 18 and a right side sill 18' provided opposite each other in the width direction of the body, and the battery pack 2 is connected to the left side sill 18 and the right side sill 18' so that the left side sill 18 and the right side sill 18' are formed as battery pack mounting beams. In the prior art, two battery pack mounting beams are provided for mounting the battery pack, and are provided between the battery pack and the left side sill and between the battery pack and the right side sill in the Y direction, respectively. With battery pack mounting beams provided in this way, the space for arranging the battery pack in the width direction of the vehicle is small, which is disadvantageous for arranging large battery packs, and when a side collision occurs to the vehicle, the battery pack mounting beams prevent a good combination of force transmission between the battery pack, the left side sill and the right side sill.

[0037] In this invention, by extending the battery pack 2 to both sides in the Y direction and directly connecting it to the left side sill 18 and the right side sill 18', the space between the left side surface of the right side sill 18' and the right side surface of the left side sill 18 that can accommodate the battery pack 2 is increased, which is advantageous for designing a large battery pack 2 in the left-right direction. By providing it in this way, the dimensions of the battery pack 2 in the Y direction can be increased, thereby increasing the power capacity of the battery pack 2 and improving the driving range of the vehicle 100. At the same time, the battery pack 2 can participate in force transmission and improve the safety performance of the vehicle 100. When a side collision occurs to the vehicle 100, and the left side sill 18 and the right side sill 18' are subjected to force, the battery pack 2 can participate in the transmission of the collision force and improve the safety performance of the vehicle 100.

[0038] In some embodiments, as shown in Figure 2, the lower body 1 includes a left side sill 18 and a right side sill 18' that are positioned opposite each other in the width direction of the body. In the longitudinal direction of the vehicle 100, the front end surface 21 of the battery pack 2 extends beyond the front end surface of the left side sill 18 and the front end surface of the right side sill 18'. This configuration increases the dimensions of the battery pack 2 in the X direction, facilitating force transmission with the front subframe 3. Naturally, in some other embodiments, in the longitudinal direction of the vehicle 100, the front end surface 21 of the battery pack 2 may be flush with the front end surface of the left side sill 18 and the front end surface of the right side sill 18', and this is not limited here.

[0039] In some other embodiments, as shown in Figures 2 and 4, the lower body 1 includes a front cross member 7 and a left side sill 18 and a right side sill 18' that are positioned opposite each other in the width direction of the body. The extension length of the front cross member 7 in the width direction of the body is greater than the distance from the inner surface of the left side sill 18 to the inner surface of the right side sill 18'. "Inner surface of the left side sill 18" refers to the right surface of the left side sill 18, and "inner surface of the right side sill 18'" refers to the left surface of the right side sill 18'. The projections of the front end surfaces of the left side sill 18 and the right side sill 18' in the width direction overlap with the projection of the front cross member 7 in the width direction. That is, Left Sa The front end surface of Idsil 18 and Right Sa The front end surface of the idsil 18' can extend in the X direction to the front cross member 7.

[0040] As a result, Left Sa Idsil 18 and Right Sa Idsil 18' can participate in force transmission when a head-on collision occurs to vehicle 100, thereby improving the safety performance of vehicle 100. Left Sa Idsil 18' and Right Sa The Idsil 18' is provided on both the left and right sides of the battery pack 2, and serves to protect the battery pack 2. Left Sa Idsil 18, battery pack 2 and Right Sa Idsil 18' can improve safety performance by participating in force transmission when a side collision occurs to the vehicle 100.

[0041] In some other embodiments, as shown in Figures 4 and 5, the lower body 1 further includes a front cross member 7 and opposing A-pillars 6, with both ends of the front cross member 7 connected to the A-pillars 6. This allows the force transmitted to the front cross member 7 when a frontal collision occurs with the vehicle 100 to be transmitted from the left and right ends of the front cross member 7 to the A-pillars 6, improving the load-bearing capacity of the front end of the vehicle 100 and enhancing the safety of the vehicle 100. Furthermore, by providing two A-pillars 6 on both the left and right sides of the lower body 1, the collision force on both sides of the vehicle 100 during a collision can be mitigated, improving the load-bearing capacity of the lower body 1 and enhancing the safety of the vehicle 100.

[0042] In some embodiments, as shown in Figures 2, 4, and 5, the lower body 1 further includes a front side member 5, and the front side member 5 is connected to a front cross member 7, thereby transmitting the frontal collision force to the front cross member 7. For example, the front side member 5 may include a left front side member 501 and a right front side member 501', and the left front side member 501 and the right front side member 501' may be provided at both ends of the front side of the front cross member 7 and connected to the front cross member 7. With this configuration, when the front side of the vehicle 100 is hit, the force transmitted to the front side member 5 is transmitted to the front cross member 7 by one end of the front side member 5 connected to the front cross member 7, and the frontal collision force is transmitted by the front cross member 7 in the width direction of the cross beam, thereby mitigating the frontal collision force when the front side of the vehicle 100 is hit, improving the structural stability of the vehicle 100, improving the load-bearing capacity of the front end of the vehicle 100, and improving the safety performance of the vehicle 100.

[0043] In some embodiments, as shown in Figures 2 and 4, the rear side of the front side member 5 has an upper force transmission structure 5A and a lower force transmission structure 5B. The rear end of the upper force transmission structure 5A is connected to the front cross member 7, and the bottom surface of the rear end of the lower force transmission structure 5B and the battery pack 2 are spaced vertically apart to form a sealed gap. The term "sealed gap" refers to the seal between the top surface of the battery pack 2 and the bottom surface of the lower body 1, forming a gap.

[0044] The rear end of the upper force transmission structure 5A of the front side member 5 is connected to the front cross member 7 (for example, by overlapping connections). When a frontal collision occurs with the vehicle 100, some of the collision force transmitted to the front side member 5 is transmitted to the front cross member 7 via the connection point between the rear end of the upper force transmission structure 5A of the front side member 5 and the front cross member 7. The front cross member 7 then transmits the frontal collision force to both sides in the width direction of the vehicle 100. The remaining frontal collision force transmitted to the front side member 5 is transmitted to the rear via the rear end of the lower force transmission structure 5B of the front side member 5. This mitigates the frontal collision force during a collision with the front of the vehicle 100, improves the structural stability of the vehicle 100, enhances the load-bearing capacity of the front end of the vehicle 100, and improves the safety of the vehicle 100. Furthermore, the bottom surface of the rear end of the lower force transmission structure 5B of the front side member 5 is parallel to the top surface of the battery pack 2. This makes it easy to provide a sealing member between the bottom surface of the rear end of the lower force transmission structure 5B and the battery pack 2.

[0045] As shown in Figure 4, the rear bottom surface of the front side member 5 and the top surface of the battery pack 2 may be provided parallel to each other and spaced vertically apart to form a sealing gap, and a sealing structure may be provided between the lower side of the front side member 5 and the top surface of the battery pack 2. This prevents interference between the rear bottom surface of the front side member 5 and the top surface of the battery pack 2, prevents the rear bottom surface of the front side member 5 from obstructing the installation of the battery pack 2, and allows the battery pack 2 to be mounted at a higher position. This increases the height of the vehicle 100 chassis, improves the vehicle's passability, and lowers the vehicle's height, increasing the interior space. At the same time, the front side member 5 can easily transmit and distribute force to both the left and right sides in the width direction, improving the safety performance of the vehicle 100.

[0046] In some specific embodiments, as shown in Figures 2 and 4, the lower body 1 further includes a front side member 5, and the rear end bottom surface of the front side member 5 and the top surface of the battery pack 2 are spaced vertically apart to form a sealing gap. It is preferable that a sealing structure is provided between the rear end bottom surface of the front side member 5 and the top surface of the battery pack 2. This prevents interference between the rear end bottom surface of the front side member 5 and the top surface of the battery pack 2, prevents the rear end bottom surface of the front side member 5 from obstructing the mounting of the battery pack 2, and allows the mounting position of the battery pack 2 to be raised, thereby increasing the height of the vehicle 100 chassis, improving the vehicle 100's passability, and facilitating power transmission. Furthermore, the rear end bottom surface of the front side member 5 is parallel to the top surface of the battery pack 2. This makes it easier to provide a sealing member between the rear end bottom surface of the front side member 5 and the battery pack 2.

[0047] In some embodiments, as shown in Figures 3 and 4, the lower force transmission structure 5B is connected to the left side sill 18, the right side sill 18', and the center tunnel 4. The front side member 5 may include a left front side member 501 and a right front side member 501', the lower end of the left front side member 501 being connected to the left side sill 18, the lower end of the right front side member 501' being connected to the left side of the right side sill 18', and at least a portion of the left front side member 501 and the right front side member 501' being connected to the center tunnel 4. With this configuration, when a frontal collision force is transmitted to the left front side member 501 and the right front side member 501', a portion of the frontal collision force is transmitted to the left side sill 18 by the left front side member 501, to the right side sill 18' by the right front side member 501', and then the frontal collision force is transmitted in the longitudinal direction of the vehicle 100 by the left side sill 18 and the right side sill 18', while the remaining portion of the frontal collision force is transmitted to the center tunnel 4 by the lower ends of the left front side member 501 and the right front side member 501', and when a collision occurs on the left or right side of the vehicle 100, at least a portion of the side collision force is transmitted to the left side sill 18, Right side sill 18'This is transmitted to the battery pack 2, and by providing it in this way, the forces that the vehicle 100 receives during collisions on the left, right, and front sides can be mitigated, thereby improving the load-bearing capacity of the vehicle 100 and enhancing the safety of the vehicle 100.

[0048] As shown in Figure 3, the lower body 1 may further include a front seat front cross member 16, the left and right ends of the front seat front cross member 16 being connected to the right side of the left side sill 18 and the left side of the right side sill 18', respectively, and the front of the front seat front cross member 16 may be connected to the rear end of the center tunnel 4. In this configuration, if some of the frontal collision force is transmitted to the rear end of the center tunnel 4, the front seat front cross member 16 This allows the force to be transmitted in the width direction of the vehicle 100, thereby mitigating the force that the vehicle 100 receives during a frontal collision, improving the load-bearing capacity of the vehicle 100, and enhancing the safety of the vehicle 100.

[0049] In some embodiments, as shown in Figures 4 and 5, the lower force transmission structure 5B is a V-shape structure. The two front side members 501, 501' each include a first connecting stage 502, a second connecting stage 503, and a third connecting stage 504, the rear end of the first connecting stage 502 being connected to both the front end of the second connecting stage 503 and the front end of the third connecting stage 504, the front end of the second connecting stage 503 being connected to the front end of the third connecting stage 504 in the longitudinal direction, and the rear ends of the second connecting stage 503 and the rear ends of the third connecting stage 504 gradually separate, that is, the first connecting stage 502, the second connecting stage 503, and the third connecting stage 504 can together form a V-shape structure.

[0050] As shown in Figure 4, the second connecting stage 503 is located outside the third connecting stage 504 and is connected to the A-pillar 6. The bottom surface of the second connecting stage 503 is flush with the bottom surface of the third connecting stage 504 so as to transmit and distribute forces from both the left and right sides. Preferably, the bottom surfaces of the second connecting stage 503 and the bottom surfaces of the third connecting stage 504 are parallel to the battery pack 2 so that the battery pack 2 can extend to the bottom surfaces of the second connecting stage 503 and the bottom surfaces of the third connecting stage 504. The bottom surface of the second connecting stage 503 may have at least one mounting point (not shown). The front end surface 21 of the battery pack 2 extends to the mounting point of the second connecting stage 503 and can be fixedly connected to the front side member 5 by the mounting point. Therefore, the battery pack 2 participates in force transmission, mitigating the force that the vehicle 100 receives during a frontal collision, improving the load-bearing capacity of the vehicle 100, and ensuring improved safety of the vehicle 100.

[0051] The left end of the lower force transmission structure 5B of the left front side member 501 is connected to the left A-pillar 6 of the lower body 1, and the right end of the lower force transmission structure 5B of the right front side member 501' is connected to the right A-pillar 6 of the lower body 1. With the front side members 5 provided in this manner, when a collision occurs on the front side of the vehicle 100, the frontal collision force is transmitted to the front side members 5 and then transmitted to the rear by the V-shaped structure. The stress area at the rear end of the front side members 5 gradually increases, preventing the concentration of the frontal collision force, mitigating the impact on the vehicle 100 due to the frontal collision force, improving the load-bearing capacity of the vehicle 100, and enhancing the safety of the vehicle 100. Furthermore, by connecting the lower force transmission structure 5B of the front side member 5 to the A-pillar 6 provided on the lower body 1, the frontal collision force is transmitted to the A-pillar 6, mitigating the force that the vehicle 100 receives during a frontal collision, improving the load-bearing capacity of the vehicle 100, and guaranteeing improved safety of the vehicle 100.

[0052] In some embodiments, as shown in Figures 4 and 5, the front side member 5 includes a left front side member 501 and a right front side member 501', which are spaced apart in the left-right direction of the vehicle 100, with a bottom cross member 14 connected between the left front side member 501 and the right front side member 501'. The bottom surface of the bottom cross member 14 and the top surface of the battery pack 2 are spaced vertically apart, forming a gap. This configuration allows for the retention of a sealed space while preventing the bottom cross member 14 from hindering the forward extension of the battery pack 2, thereby increasing the power capacity of the battery pack. The bottom cross member 14 may be located behind the left front side member 501 and the right front side member 501', and both ends may be connected to the left front side member 501 and the right front side member 501', respectively. With the left front side member 501 and the right front side member 501' provided in this manner, when the front of the vehicle 100 is hit, the frontal impact force is transmitted to the rear ends of the left front side member 501 and the right front side member 501', and then guided by the bottom cross member 14 to transmit the impact force in the width direction of the vehicle 100. This plays a role in mitigating and dispersing the frontal impact force, improving the load-bearing capacity of the front end of the vehicle 100, and improving the safety of the vehicle 100.

[0053] The bottom surface of the bottom cross member 14 and the top surface of the battery pack 2 are spaced apart vertically, forming a gap. The bottom surface of the bottom cross member 14, thus positioned, does not interfere with the top surface of the battery pack 2, allowing the front end of the battery pack 2 to continue extending forward. This increases the mounting space for the battery pack 2 in the X direction and prevents the bottom surface of the bottom cross member 14 from hindering the mounting of the battery pack 2, thereby improving the assembly speed of the vehicle 100, facilitating automated production of the vehicle 100, and increasing the height of the vehicle 100's chassis, improving the vehicle 100's passability. Furthermore, the rear end bottom surface of the front side member 5 is parallel to the top surface of the battery pack 2. This makes it easier to provide a sealing member between the rear end bottom surface of the front side member 5 and the battery pack 2.

[0054] In some embodiments, the widthwise projections of the front end surfaces of the left side sill 18 and the right side sill 18' overlap with the widthwise projection of the bottom cross member 14. In other words, the bottom cross member 14 protrudes from the front end surfaces of the left side sill 18 and the right side sill 18' in the longitudinal direction. This extends the bottom cross member 14 forward, thereby increasing the mounting space for the battery pack 2 in the X direction of the vehicle 100.

[0055] In some embodiments, as shown in Figures 1 and 6, the vehicle 100 further includes a rear subframe 8, which is connected to the lower body 1. The front end surface of the rear subframe 8 is formed as a stopper surface that extends behind the battery pack 2.

[0056] In other words, the battery pack 2 can extend to the front end surface of the rear subframe 8. By providing it in this way, the dimensions of the battery pack 2 in the X direction can be increased, improving the space utilization rate. At the same time, because the battery pack 2 can extend to the rear subframe 8, in the event of a rear-end collision, in addition to the force transmission by the front side member 5, the battery pack 2 can transmit force as a force transmission structure. Since the front end surface of the rear subframe 8 is formed as a stopper surface extending behind the battery pack 2, when the vehicle 100 is running normally, there is a gap between the front end surface of the rear subframe 8 and the rear end surface of the battery pack 2. When a rear-end collision occurs with the vehicle 100, the rear subframe 8 contacts the rear end surface of the battery pack 2 forward after receiving the applied force, so the battery pack 2 participates in force transmission. Therefore, the battery pack 2 can withstand the force and distribute it, improving the safety performance of the vehicle 100.

[0057] This increases the dimensions of the battery pack 2 in the X direction, improving space utilization and extending the driving range of the vehicle 100. At the same time, the battery pack 2 can withstand and distribute forces, thereby improving the safety performance of the vehicle 100.

[0058] For example, as shown in Figure 6, the minimum distance between the front of the rear subframe 8 and the rear of the battery pack 2 is d2, where d2 satisfies 15mm ≤ d2 ≤ 30mm. For example, d2 = 20mm. In this way, it is possible to prevent the distance between the rear end surface of the battery pack 2 and the front of the rear subframe 8 from being too large, ensuring that there is sufficient space for the battery pack 2 in the X direction, while at the same time allowing the rear subframe 8 to easily contact the battery pack 2 and transmit force. Furthermore, when installing the battery pack 2, the front of the rear subframe 8 and the battery pack 2 are not directly connected but are spaced apart, making it easier to install the battery pack 2, improving the assembly speed of the vehicle 100, and avoiding interference between the rear end surface of the battery pack 2 and the front of the rear subframe 8 during installation or when the vehicle 100 is running.

[0059] In some embodiments, as shown in Figures 4 and 7-8, the lower body 1 further includes a middle cross member 11 and two spaced-apart rear side members 9. The middle cross member 11 extends along the width direction of the vehicle 100 and connects to the rear side members 9, the left side sill 18, and the right side sill 18'. The middle cross member 11 is located on the rear side of the lower body 1, and both ends of the middle cross member 11 that extend along the width direction of the vehicle 100 are connected to the left side sill 18 and the right side sill 18', respectively, and at least a portion of the rear side of the middle cross member 11 may be located below the front end of the rear side members 9. This allows the left side sill 18 and the right side sill 18' to extend to the middle cross member 11, and can participate in force transmission when a rear-end collision occurs to the vehicle 100, thereby improving the safety performance of the vehicle 100. The left side sill 18 and the right side sill 18' can also be located on the left and right sides of the battery pack 2, respectively, to protect the battery pack 2. Furthermore, the left side sill 18, battery pack 2, and right side sill 18' can improve safety performance by being involved in force transmission when a side collision occurs to the vehicle 100.

[0060] In some embodiments, as shown in Figure 7, the middle cross member 11 is formed as a battery pack mounting beam. That is, the rear end of the battery pack 2 may be attached to the middle cross member 11. The lower surface of the middle cross member 11 and the top surface of the battery pack 2 are spaced vertically apart to form a sealing gap. It is preferable that a sealing structure is provided between the lower surface of the middle cross member 11 and the top surface of the battery pack 2. This prevents interference between the lower surface of the middle cross member 11 and the top surface of the battery pack 2, prevents the lower surface of the middle cross member 11 from hindering the mounting of the battery pack 2, and increases the dimensions of the battery pack 2 in the X direction, thereby increasing the height of the vehicle 100 chassis and improving the vehicle's passability. Also, the lower surface of the middle cross member 11 is parallel to the top surface of the battery pack 2. This makes it easier to provide a sealing member between the lower surface of the middle cross member 11 and the battery pack 2.

[0061] In some embodiments, as shown in Figures 7 and 18, the middle cross member 11 is provided with subframe mounting seats 15 at intervals. The subframe mounting seats 15 are located on the side sill (i.e., the left side sill 1 8th grade It is provided on the rear side of the right side sill 18') along the longitudinal direction of the vehicle 100. This allows the subframe mounting seat 15 to be formed into a cage-like structure and covers at least the left-right outer circumference of the rear of the battery pack 2, playing a role in protecting the sides of the rear of the battery pack 2. For example, the upper surface of the rear of the battery pack 2 is provided with a gap from the subframe mounting seat 15 in the height direction so that other members can be accommodated in the gap, making rational use of space. To understand this, the subframe mounting seat 15 is located between the middle cross member 11 and the battery pack 2 and Because it is located on the rear side of the connection point, when the subframe is subjected to a collision force, the subframe mounting seat 15 transmits the force to the middle cross member 11 and the battery pack. 2 It can transmit power, thereby forming an effective power transmission path, and the battery pack 2nd gradeBy utilizing the middle cross member 11, a new power transmission path can be formed, and the battery pack 2 Due to its large surface area, it can effectively reduce damage to the vehicle's structure during the power transmission process.

[0062] In some embodiments, as shown in Figures 9 and 10, the left side sill 18 includes a left side sill housing 1801 and a left side sill reinforcing beam 1802 provided within the left side sill housing 1801, and the right side sill 18' includes a right side sill housing (not shown) and a right side sill reinforcing beam (not shown) provided within the right side sill housing.

[0063] The left side sill 18 will be described below as an example. The left side sill 18 is located on the left side of the lower body 1 and extends along the longitudinal direction of the vehicle 100. The left side sill 18 includes a left side sill housing 1801 and a left side sill reinforcing beam 1802 provided within the left side sill housing 1801. The left side sill housing 1801 may include a left side sill left housing 18011 and a left side sill right housing 18011'. The left side sill reinforcing beam 1802 may have at least one cavity 18021 that penetrates the left side sill reinforcing beam 1802 along the longitudinal direction. The left side sill reinforcing beam 1802 is provided in a housing cavity formed by the left side sill left housing 18011 and the left side sill right housing 18011'. The left side sill left housing 18011 has an upper left flange 18012' on its upper surface, a lower left flange 18013' on its lower surface, an upper right flange 18012 on its upper surface, and a lower right flange 18013 on its lower surface. The upper left flange 18012' and upper right flange 18012 are attached along the width direction, and the lower left flange 18013' and lower right flange 18013 are attached along the width direction, improving the structural stability of the left side sill 18 and the load-bearing capacity of the left side sill housing 1801.

[0064] The left side sill reinforcing beam 1802 is provided on the left side sill housing 1801 and at least a portion of it is connected to at least one of the left side sill left housing 18011 and the left side sill right housing 18011'. When provided in this manner, the left side sill reinforcing beam 1802 improves the load-bearing capacity of the left side sill 18, and in the event of a left-side collision with the vehicle 100, the left side sill reinforcing beam 1802 can protect the lower body 1, thereby improving the safety of the vehicle 100.

[0065] The cavity 18021 may be multiple, and the multiple cavities 18021 may penetrate the left side sill reinforcing beam 1802 along the longitudinal direction, and the longitudinal interface of the multiple cavities 18021 may be in the shape of a grid. The left side sill reinforcing beam 1802 provided in this manner reduces its material and weight, making it easier to realize a lightweight design for the vehicle 100.

[0066] The side sill can realize a "sandwich" type side protection structure having an upper, middle, and lower layer. Specifically, taking the left side sill 18 as an example, after receiving a force, the left side sill 18 transmits the upper layer of lateral force through the upper battery pack housing 2011 above the battery pack 2, transmits the force from the left side sill reinforcing beam 1802 to the left extension 20111 and then to the cell 202 to form the middle layer lateral force transmission structure, and transmits the force from the left side sill 18 to the left extension 20111 and the cell 202 and then to the bottom plate of the battery pack 2 to form the lower layer lateral force transmission structure. As a result, a "sandwich" type side protection structure having an upper, middle, and lower layer is formed, and the safety of occupants inside the vehicle can be better protected.

[0067] For example, as shown in Figure 9, the left side sill reinforcing beam 1802 and the right side sill reinforcing beam are each made of aluminum alloy profiles. By using aluminum alloy profiles for the left side sill reinforcing beam 1802 and the right side sill reinforcing beam, the rigidity, torsional strength, and load-bearing capacity of the left side sill reinforcing beam 1802 and the right side sill reinforcing beam are guaranteed, and the weight of the left side sill reinforcing beam 1802 and the right side sill reinforcing beam can be reduced, making it easy to achieve a lightweight design for the vehicle 100. Furthermore, the left side sill reinforcing beam 1802 and the right side sill reinforcing beam have a high degree of contact with the battery pack 2, resulting in a high force transmission effect.

[0068] In some embodiments, as shown in Figures 9, 10, and 11, the battery pack 2 includes an upper battery pack housing 2011, a lower battery pack housing 2012, and at least one cell 202. The upper battery pack housing 2011 and the lower battery pack housing 2012 form a housing space 2013, and at least one cell 202 is provided in the housing space 2013. Since at least a portion of the upper surface of the upper battery pack housing 2011 is formed as the floor of the vehicle body, in this application, at least a portion of the floor of the vehicle body in the prior art can be omitted.

[0069] This application Vehicle 100 Therefore, by omitting the floor of the vehicle body in the conventional technology and forming the floor of the vehicle body using at least the upper surface of the battery pack 2, the space utilization rate of the vehicle 100 can be improved, the passenger space can be expanded, the height of the vehicle can be reduced, the passability of the vehicle 100 can be improved, and the structure of the vehicle 100 can be simplified and assembly efficiency can be improved.

[0070] The upper battery pack housing 2011 may have a left extension portion 20111 and a right extension portion 20111' on both sides in the width direction, the left extension portion 20111 may have a plurality of left connection holes (not shown) spaced apart along the longitudinal direction of the vehicle 100, and the right extension portion 20111' may have a plurality of right connection holes (not shown) spaced apart along the longitudinal direction of the vehicle 100, the left connection holes and the right connection holes may pass through each other in the vertical direction, and connection bolts 19 may be provided in each of the left and right connection holes, and the upper battery pack housing 2011 may be connected to the left side sill 18 and the right side sill 18' by the connection bolts 19.

[0071] The following explanation will use the example that the left extension portion 20111 is connected to the left side sill 18. A left side sill connection hole (not shown) that penetrates vertically may be provided in the left side sill 18 at a location corresponding to the left connection hole of the left side sill housing 1801, and the connection bolt 19 may be inserted into the left side sill connection hole of the left side sill housing 1801 and the left connection hole of the left extension portion 20111. This improves the connection stability between the left side sill 18 and the upper housing 2011 of the battery pack, and also allows the battery pack 2 to be used as a load-bearing member. Therefore, when a collision occurs on the left side of the vehicle 100, the side impact force can be transmitted from the left side sill 18 to the battery pack 2, mitigating the force that the vehicle 100 receives during a collision on the left side, preventing the vehicle 100 from deforming significantly due to the side impact force, improving the load-bearing capacity of the vehicle 100, and improving the safety of the vehicle 100.

[0072] Between the upper battery pack housing 2011 and the lower battery pack housing 2012, a housing space 2013 is formed that can accommodate at least one cell 202. Since both the upper battery pack housing 2011 and the lower battery pack housing 2012 can protect the cell 202, the number of cells 202 housed in the battery pack 2 increases, the total power capacity of the battery pack 2 increases, and the driving range of the vehicle 100 improves.

[0073] By forming at least a portion of the upper surface of the upper battery pack housing 2011 as the floor of the vehicle body, the housing space 2013 for the battery pack 2 can extend upward, expanding the mounting space for the battery pack 2, increasing the electrical capacity of the battery pack 2, increasing the power output of the battery pack 2, improving the driving range of the vehicle 100, saving materials, reducing the total weight of the vehicle 100, and facilitating the lightweight design of the vehicle 100.

[0074] In some embodiments, as shown in Figure 11, the cell 202 is fixedly connected to the upper battery pack housing 2011. This reduces the space occupied by the battery pack 2 in the Z direction, improves the Z-direction space utilization rate, and enhances the mounting reliability of the cell 202 and the upper battery pack housing 2011. As shown in Figures 11 and 12, the top surface of the cell 202 is bonded to the top cover with a structural adhesive 203. In this way, the space occupied by the battery pack 2 in the Z direction can be reduced, while the gap between the cell 202 and the upper battery pack housing 2011 can be reduced, increasing the compactness between the cell 202 and the upper battery pack housing 2011. By preventing the gap between the cell 202 and the upper battery pack housing 2011 from becoming too large, if the upper battery pack housing 2011 is the floor of the vehicle body, it is possible to prevent the cell 202 from being subjected to a large force and separating from the upper battery pack housing 2011. Furthermore, the force can be transmitted by the upper battery pack housing 2011, improving the strength of the upper battery pack housing 2011 and improving the mode of the upper battery pack housing 2011.

[0075] In some embodiments, as shown in Figure 11, the lower battery pack housing 2012 is a cooling plate, and the bottom surface of the cell 202 is bonded to the lower battery pack housing 2012 by a thermally conductive adhesive 204. The cooling plate of the battery pack 2 plays a role in cooling the cell 202 as the lower housing, and the bottom surface of the cell 202 is bonded to the lower battery pack housing 2012 by a thermally conductive adhesive 204. With this configuration, when the cell 202 generates heat, the lower battery pack housing 2012 cools the cell 202 by transferring heat from the bottom surface of the cell 202 to the lower battery pack housing 2012 via the thermally conductive adhesive 204, thereby lowering the temperature inside the battery pack 2, avoiding the danger of overheating of the cell 202 inside the battery pack 2, improving the safety and reliability of the battery pack 2, and improving the safety of the vehicle 100. Furthermore, the integration density of the battery pack 2 can be improved, and the energy density of the battery pack 2 can be improved.

[0076] Alternatively, since cell 202 is connected to the upper battery pack housing 2011 and the lower battery pack housing 2012 is not subjected to force, the lower battery pack housing 2012 can be replaced by a cooling plate, eliminating the need for the lower battery pack housing 2012 and reducing the weight of the battery pack 2. In addition, the cooling plate can serve to protect the battery pack 2, thereby improving the safety and reliability of the battery pack 2 and the safety of the vehicle 100.

[0077] In some embodiments, as shown in Figures 10, 11, and 16, the battery pack 2 may include at least one cell 202, the longitudinal direction of which is aligned with the longitudinal direction of the vehicle 100. At least one cell 202 is provided in the housing space 2013 of the battery pack 2, and the longitudinal direction of the cell 202 is set to align with the longitudinal direction of the vehicle 100. This increases the number of cells 202 arranged along the width direction, improves the space utilization rate of the battery pack 2, increases the number of cells 202 housed in the battery pack 2, and improves the driving range of the vehicle 100.

[0078] As shown in Figures 10 and 11, the battery pack 2 includes a plurality of cells 202, which are arranged side by side along the width direction of the vehicle 100. The main expansion surface of the cell 202 (i.e., the surface with the largest area on the outer surface of the cell 202) is positioned facing the width direction of the vehicle 100. This makes it easier for the cell 202 to participate in force transmission during a side collision of the vehicle 100, while also improving the space utilization rate of the battery pack 2 and making it easier to increase the number of cells 202 housed in the battery pack 2, thereby increasing the total power capacity of the battery pack 2 and improving the driving range of the vehicle 100. For example, the main expansion surface of the cell 202 is in close contact with the upper housing 2011 of the battery pack, and the cell 202 positioned in this manner can increase the force transmission area, thereby reducing pressure and improving the force transmission effect.

[0079] In some embodiments, as shown in Figure 12, a sealing plate assembly 20 is provided on the lower body 1, and the upper surface of the battery pack 2 is sealed to the sealing plate assembly 20. This improves the reliability of the seal between the battery pack 2 and the passenger compartment and prevents foreign matter such as dust from entering the underside of the lower body 1 from the upper surface of the battery pack 2. The sealing plate assembly 20 is provided on the vehicle body, and the gap between it and the battery pack 2 is a sealing gap. The sealing plate assembly can provide a flat surface to facilitate sealing with the battery pack 2. With the sealing plate assembly 20 provided in this way, the upper side of the battery pack 2 is easily sealed, sealing reliability is ensured, and vehicle assembly is facilitated.

[0080] In some embodiments, as shown in Figures 9 and 13, the sealing plate assembly 20 includes an annular sealing plate 2001 and at least one sealing member 2002, the sealing member 2002 provided between the sealing plate 2001 and the battery pack 2. The sealing member 2002 is annular in shape and may consist of two sealing members 2002 that seal between the sealing plate 2001 and the battery pack 2, with one of the two adjacent sealing members 2002 located on the outer circumference of the other sealing member 2002, and the two sealing members 2002 spaced apart along the inward and outward directions. The sealing member 2002 may be a sealing sponge, a sealing rubber strip, or the like. The two sealing members 2002 deform under pressure to achieve sealing reliability, improve the tightness of a single sealing member 2002, enhance the sealing effect of the sealing plate 2001, and block substances such as water and air from entering on both the inside and outside sides of the rubber strip.

[0081] For example, the sealing plate 2001 may include a plurality of sequentially connected sub-sealing plates 2001, and the plurality of sub-sealing plates 2001 may be formed by welding. Alternatively, the sealing plate 2001 can be manufactured by pressing a single steel plate, and the sealing performance of the sealing plate 2001 can be improved by integral molding.

[0082] As shown in Figure 9, 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 face each other, and the sealing member 2002 is provided between the first flat portion 2001a and the second flat portion 2014. By providing the first flat portion 2001a and the second flat portion 2014 facing each other, and by having at least one sealing member 2002 attached between the first flat portion 2001a and the second flat portion 2014, the sealing effect of the sealing plate 2001 can be further improved, thereby improving the airtightness of the lower body 1 and improving passenger comfort.

[0083] Preferably, the sealing member 2002 is a foam member. The foam member may be made of EVA (Ethylene Vinyl Acetate) or EPE (Expandable Polyethylene) material and has properties such as being lightweight, deformable, having excellent sound insulation and excellent heat insulation, improving the heat insulation of the sealing plate 2001, preventing the temperature of the battery pack 2 from rising and transferring upward, improving the safety and reliability of the battery pack 2, improving the safety of the vehicle 100, and the foam member can improve the sound insulation of the vehicle 100, block substances such as water and air, and improve passenger comfort. The foam member may be sealed and compressed to some extent to ensure the sealing effect. The foam member may be adhesively connected to the battery pack 2.

[0084] In some embodiments, as shown in Figures 9, 10, 14, and 15, the lower body 1 is provided with a left side sill 18 on the left side and a right side sill 18' on the right side. The sealing plate 2001 includes a left sealing plate step 2001b and a right sealing plate step 2001b'. The left sealing plate step 2001b has a first planar portion 2001a and a left flange 2001c at the left end of the left sealing plate step 2001b, the first planar portion 2001a of the left sealing plate step 2001b is connected to the left flange 2001c, and the left sealing plate step 2001b is connected to the left side sill 18 by the left flange 2001c. The right sealing plate step 2001b' has a first planar portion 2001a and a right flange 2001c' at the right end of the right sealing plate step 2001b', the first planar portion 2001a of the right sealing plate step 2001b' is connected to the right flange 2001c', and the right sealing plate step 2001b' is connected to the right side sill 18' by the right flange 2001c'. The left sealing plate step 2001b is connected to the left side sill 18 by the left flange 2001c, and the right sealing plate step 2001b' is connected to the right side sill 18' by the right flange 2001c'.

[0085] The following explanation will use the example that the left side sill 18 is connected to the left sealing plate step 2001b. The left end of the left sealing plate step 2001b has a left flange 2001c that bends downward and extends, and the left side surface of the left flange 2001c may be provided facing the right side surface of the left side sill 18, and at least a part of it may be connected to the right side surface of the left side sill 18. With this configuration, the connection reliability between the sealing plate 2001 and the left side sill 18 is improved by the left sealing plate step 2001b, preventing the sealing plate 2001 from shifting from its sealed position due to vibrations while the vehicle 100 is running, improving the sealing effect of the sealing plate 2001, improving the airtightness of the lower body 1, and improving passenger comfort.

[0086] In some embodiments, as shown in Figures 13 and 15, the sealing plate 2001 further includes a front sealing plate step 2001d and a rear sealing plate step 2001f, the front sealing plate step 2001d being connected to a front side member 5, and the rear sealing plate step 2001f being connected to a middle cross member 11. The sealing plate 2001 may include a front sealing plate step 2001d and a rear sealing plate step 2001f, and a front flange 2001e may be provided on at least one side in the width direction of the front sealing plate step 2001d, the front sealing plate step 2001d being connected to a front side member 5 of the lower body 1 by the front flange 2001e, and a rear flange (not shown) may be provided on at least one side in the width direction of the rear sealing plate step 2001f, the rear sealing plate step 2001f being connected to a middle cross member 11 of the lower body 1 by the rear flange. With this configuration, the front sealing plate step 2001d and the rear sealing plate step 2001f improve the reliability of the connection between the sealing plate 2001 and the lower body 1, preventing the sealing plate 2001 from shifting from its sealed position due to vibrations during vehicle 100 operation, improving the sealing effect of the sealing plate 2001, improving the airtightness of the lower body 1, and enhancing passenger comfort.

[0087] In some embodiments, as shown in Figures 12, 16, and 17, the lower body 1 is provided with a seat cross member 13 extending in the width direction, and 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 cross member 13 by the battery pack reinforcing beam 2015. The lower body 1 may be provided with a seat cross member 13 extending in the width direction, and the seat is preferably provided on the upper side of the seat cross member 13, and the battery pack 2 may be provided with a battery pack reinforcing beam 2015 extending in the width direction in the portion corresponding to the seat cross member 13, and the battery pack 2 is connected to the seat cross member 13 by the battery pack reinforcing beam 2015. This improves the reliability of the connection between the battery pack 2 and the lower body 1, thereby improving the safety of the vehicle. Furthermore, when the left or right side of the vehicle is hit, the side impact force can be transmitted in the width direction of the vehicle by the battery pack reinforcing beam 2015, thereby reducing the effect of the side impact force, preventing the vehicle 100 from deforming significantly due to the side impact force, improving the load-bearing capacity of the vehicle 100, and enhancing the safety of the vehicle 100. The annular edge on the upper surface of the battery pack 2 and the battery pack reinforcing beam 2015 are both connected to the lower body 1 by bolts, ensuring the reliability of the battery pack 2's mounting.

[0088] Furthermore, in the description of this disclosure, the orientations or positional relationships indicated by terms such as "center," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "top," "bottom," "inside," "outside," "axial direction," "radial direction," and "circumferential direction" are based on the orientations or positional relationships shown in the drawings and are merely for the purpose of easily explaining and simplifying this disclosure. They do not indicate or suggest that the shown device or component has a specific orientation or must be configured and operate in a specific orientation, and should not be understood as limiting this disclosure.

[0089] In the descriptions of this disclosure, “first feature” and “second feature” may include one or more such features. In the descriptions of this disclosure, “multiple” means two or more. In the descriptions of this disclosure, the presence of the first feature “above” or “below” the second feature may include the first feature and the second feature being in direct contact, or they may not be in direct contact but are in contact through other features between them. In the descriptions of this disclosure, the presence of the first feature “above,” “above,” or “on the top surface” of the second feature may include the first feature being directly above and diagonally above the second feature, or it may simply mean that the horizontal height of the first feature is greater than that of the second feature.

[0090] In this specification, any reference to the terms “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, configurations, materials, or properties described in conjunction with such embodiment or example are included in at least one embodiment or example of this disclosure. In this specification, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example.

[0091] While embodiments of this disclosure have been shown and described, those skilled in the art will understand that various modifications, amendments, substitutions, and variations can be made to these embodiments without departing from the principles and objectives of this disclosure, and that the scope of this disclosure is limited by the claims and their equivalents. [Explanation of Symbols]

[0092] 100 vehicles 1 Lower body 2 Battery packs 21 Front 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 3 Front subframe 31 Rear end surface 4 Center Tunnel 5 Front side members 5A Upper force transmission structure 5B Lower force transmission structure 501 Left front side member 501' Right front side member 502 First Connection Stage 503 Second connection stage 504 Third Connection Stage 6 A-pillar 7 Front cross member 8. Rear subframe 9 Rear side member 901 Left rear side member 901' Right rear side member 10 Battery pack mounting beam 11 Middle Cross Members 12 Rear seat front cross member 13 Seat cross member 14 Bottom Cross Members 15 Subframe mounting seat 16 Front Seat Front Cross Member 18 Left side sill 18' Right side sill 1801 Left side sill housing 18011 Left side sill left housing 18011' Left side sill, right housing 18012 Upper right flange 18013 Lower right flange 18012' Upper left flange 18013' Lower left flange 1802 Left side sill reinforcement beam 18021 Cavity 19 connecting bolts 20 Sealing plate assembly 2001 Sealing plate 2001a 1st plane part 2001b Left seal plate stage 2001b' Right seal plate stage 2001c Left flange 2001c' Right flange 2001d front seal plate stage 2001e Front flange 2001f rear seal plate stage 2002 Sealing component.

Claims

1. It includes a lower body (1), a front subframe (3), and a battery pack (2), The front subframe (3) is connected to the lower body (1), The battery pack (2) is connected to the lower body (1) and is provided on the lower side of the lower body (1). The rear end surface (31) of the front subframe (3) is formed as a stopper surface extending forward of the battery pack (2), and at least a portion of the upper surface of the battery pack (2) is formed as the floor of the vehicle body. The minimum distance between the front end surface (21) of the battery pack (2) and the rear end surface (31) of the front subframe (3) is d1, and d1 satisfies 10 mm ≤ d1 ≤ 100 mm. The aforementioned lower body (1) is Including the left side sill (18) and the right side sill (18'), The right side sill (18') and the left side sill (18) are provided facing each other in the width direction of the vehicle body, and the battery pack (2) is connected to the left side sill (18) and the right side sill (18'), so that the left side sill (18) and the right side sill (18') are formed as a battery pack mounting beam (10). The aforementioned lower body (1) is The front cross member (7) and the A-pillar (6) are also included, The A-pillars (6) are provided opposite each other, and both ends of the front cross member (7) are connected to the A-pillars (6). The lower body (1) further includes a front side member (5), the front side member (5) is connected to the front cross member (7), and the rear side of the front side member (5) has an upper force transmission structure (5A) and a lower force transmission structure (5B), the rear end of the upper force transmission structure (5A) is connected to the front cross member (7), and the bottom surface of the rear end of the lower force transmission structure (5B) and the battery pack (2) are spaced vertically apart to form a sealing gap. The rear end of the lower force transmission structure (5B) is connected to the left side sill (18), the right side sill (18'), and the center tunnel (4). A vehicle (100) characterized by the following.

2. The aforementioned lower body (1) is Including the left side sill (18) and the right side sill (18'), The right side sill (18') and the left side sill (18) are provided opposite each other in the width direction of the vehicle body. The vehicle (100) according to claim 1, characterized in that, in the longitudinal direction of the vehicle (100), the front end surface (21) of the battery pack (2) extends beyond the front end surface of the left side sill (18) and the front end surface of the right side sill (18').

3. The aforementioned lower body (1) is Front cross member (7) and, Including the left side sill (18) and the right side sill (18'), The right side sill (18') and the left side sill (18) are provided opposite each other in the width direction of the vehicle body. The vehicle (100) according to claim 1, characterized in that the extending length of the front cross member (7) in the width direction of the vehicle body is greater than the distance from the inner surface of the left side sill (18) to the inner surface of the right side sill (18'), and the projections of the front end surface of the left side sill (18) and the front end surface of the right side sill (18') in the width direction overlap with the projection of the front cross member (7) in the width direction.

4. The vehicle (100) according to claim 1, characterized in that the rear end bottom surface of the lower force transmission structure (5B) is parallel to the top surface of the battery pack (2).

5. The lower body (1) further includes a front side member (5), The vehicle (100) according to claim 1, characterized in that the rear end bottom surface of the front side member (5) and the top surface of the battery pack (2) are spaced apart in the vertical direction to form a sealing gap, and the rear end bottom surface of the front side member (5) is parallel to the top surface of the battery pack (2).

6. The aforementioned front side member (5) is Including the left front side member (501) and the right front side member (501'), The vehicle (100) according to claim 5, characterized in that the right front side member (501') and the left front side member (501) are spaced apart in the left-right direction of the vehicle (100), a bottom cross member (14) is connected between the left front side member (501) and the right front side member (501'), the bottom surface of the bottom cross member (14) and the top surface of the battery pack (2) are spaced apart in the vertical direction, and the bottom surface of the bottom cross member (14) is parallel to the top surface of the battery pack (2).

7. Further including the rear subframe (8), The rear subframe (8) is connected to the lower body (1), The vehicle (100) according to claim 1, characterized in that the front end surface of the rear subframe (8) is formed as a stopper surface extending to the rear of the battery pack (2).

8. The aforementioned lower body (1) is It further includes a middle cross member (11) and two rear side members (9), The two rear side members (9) are provided with a gap between them, The vehicle (100) according to claim 7, characterized in that the middle cross member (11) extends along the width direction of the vehicle (100) and is connected to the rear side member (9), the left side sill (18), and the right side sill (18').

9. The middle cross member (11) is formed as the battery pack mounting beam (10), and the lower surface of the middle cross member (11) and the top surface of the battery pack (2) are spaced apart vertically to form a sealing gap, or, The vehicle (100) according to claim 8, characterized in that the middle cross member (11) is provided with subframe mounting seats (15) at intervals.

10. The aforementioned battery pack (2) is Battery pack upper housing (2011), Lower battery pack housing (2012), It includes at least one cell (202), The upper battery pack housing (2011) and the lower battery pack housing (2012) form a housing space (2013), and at least one of the cells (202) is provided in the housing space (2013). The vehicle (100) according to claim 1, characterized in that at least a portion of the upper surface of the upper housing (2011) of the battery pack is formed as the floor of the vehicle body.

11. The cell (202) is fixedly connected to the upper housing (2011) of the battery pack, and the top surface of the cell (202) is bonded to the upper housing (2011) of the battery pack, or The vehicle (100) according to claim 10, characterized in that the lower housing (2012) of the battery pack is a cooling plate, and the bottom surface of the cell (202) is bonded to the lower housing (2012) of the battery pack by a thermally conductive adhesive (204).

12. The vehicle (100) according to claim 1, wherein the battery pack (2) includes a plurality of cells (202), the longitudinal direction of the cells (202) is the longitudinal direction of the vehicle (100), and the plurality of cells (202) are arranged side by side along the width direction of the vehicle (100).

13. A sealing plate assembly (20) is provided on the lower body (1), and the upper surface of the battery pack (2) is sealed and connected to the sealing plate assembly (20), and the sealing plate assembly (20) is an annular sealing plate (2001). The vehicle (100) according to claim 1, wherein the vehicle (100) includes at least one sealing member (2002), the sealing member (2002) is provided between the annular sealing plate (2001) and the battery pack (2).

14. The lower body (1) further includes a front side member (5) and a middle cross member (11), The sealing plate (2001) has a first planar portion (2001a), the battery pack (2) has a second planar portion (2014), the first planar portion (2001a) and the second planar portion (2014) face each other, and the sealing member (2002) is provided between the first planar portion (2001a) and the second planar portion (2014), or The sealing plate (2001) includes a left sealing plate step (2001b) and a right sealing plate step (2001b'), the left sealing plate step (2001b) has a left flange (2001c) at its left end, the left sealing plate step (2001b) is connected to the left side sill (18) by the left flange (2001c), the right sealing plate step (2001b') has a right flange (2001c') at its right end, and the right sealing plate step (2001b') is front The vehicle (100) according to 13, characterized in that the sealing plate (2001) is connected to the right side sill (18') by the right flange (2001c'), and the sealing plate (2001) further includes a front sealing plate step (2001d) and a rear sealing plate step (2001f), the front sealing plate step (2001d) is connected to the front side member (5), and the rear sealing plate step (2001f) is connected to the middle cross member (11).

15. The lower body (1) is provided with a seat cross member (13) that extends along the width direction. The vehicle (100) according to any one of claims 1 to 14, characterized in that the battery pack (2) is provided with a battery pack reinforcing beam (2015) extending in the width direction, and the battery pack reinforcing beam (2015) is connected to the seat cross member (13).

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