Lower vehicle body, chassis and vehicle

Abstract

The invention discloses a lower vehicle body, a chassis and a vehicle. The lower vehicle body (3) comprises a first cross beam (32), a first longitudinal beam (31), a torsion box (4), a first cover plate (33) and a second cover plate (34). The torsion box (4) comprises a main body part (11), a first connecting plate (12) and a second connecting plate (13), the main body part (11) is connected with the first cross beam (32) and the first longitudinal beam (31), and the first connecting plate (12) and the second connecting plate (13) are arranged at an interval and connected to the main body part (11). The first cover plate (33) is connected to the first connecting plate (12), and the second cover plate (34) is connected to the second connecting plate (13). The torsion box (4), the first cover plate (33) and the second cover plate (34) are used for forming at least one part of a battery box body (5), and the battery box body (5) is used for containing the battery cells (1).

Description

Lower body, chassis and vehicle Technical Field

[0001] The present application relates to the technical field of vehicles, and more particularly, to an underbody, a chassis, and a vehicle. Background Art

[0002] With the rapid development of automation and intelligent technology, new energy vehicles are becoming more and more popular and popular among the public. How to improve the endurance of vehicles is a research direction in vehicle technology.

[0003] Summary of the Invention

[0004] The present application provides a lower body, a chassis and a vehicle, which can reduce the cost of the vehicle.

[0005] In a first aspect, an embodiment of the present application provides a lower body of a vehicle. The lower body includes a first crossbeam, a first longitudinal beam, a torsion box, a first cover plate, and a second cover plate. The torsion box includes a main body, a first connecting plate, and a second connecting plate. The main body connects the first crossbeam and the first longitudinal beam. The first connecting plate and the second connecting plate are spaced apart and connected to the main body. The first cover plate is connected to the first connecting plate, and the second cover plate is connected to the second connecting plate. The torsion box, the first cover plate, and the second cover plate are used to form at least a portion of a battery case, which is used to accommodate battery cells.

[0006] By setting a first connecting plate and a second connecting plate on the torsion box, the torsion box can be connected to the first cover plate and the second cover plate of the vehicle, so that the torsion box and the battery box are integrated together, thereby reducing the number of parts, saving space, improving structural efficiency, reducing vehicle weight, and increasing cruising range.

[0007] In some embodiments, a first mounting portion is provided at one end of the main body, the first mounting portion comprising a first mounting plate and a second mounting plate connected to the first connecting plate, the second mounting plate being at a predetermined angle to the first mounting plate. At least one of the first mounting plate and the second mounting plate is configured to connect to the first longitudinal beam.

[0008] When the vehicle collides or encounters an accident, the torsion box can effectively disperse the collision force by virtue of the connection between the main body and the first longitudinal beam, thereby reducing the deformation of the lower body, reducing the risk of battery cell compression, and improving reliability.

[0009] When assembling the first longitudinal beam and the torsion box, both the first mounting plate and the second mounting plate can be used to fit with the first longitudinal beam, which can help achieve positioning between the first mounting portion and the first longitudinal beam and simplify the assembly process.

[0010] In some embodiments, the second mounting plate is perpendicular to the first mounting plate.

[0011] An L-shaped contact surface may be formed between the first longitudinal beam and the first mounting portion, which helps to simplify the requirements for the shape of the first longitudinal beam and improve the connection strength between the first longitudinal beam and the first mounting portion.

[0012] In some embodiments, the first mounting plate is located at one end of the main body along the first direction. The first connecting plate and the second mounting plate are respectively connected to two opposing surfaces of the first mounting plate along the second direction. The second mounting plate is perpendicular to the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0013] The second mounting plate and the first connecting plate can be connected to the first mounting plate from both sides of the first mounting plate, respectively, which can reduce the risk of interference between the second mounting plate and the first connecting plate.

[0014] In some embodiments, the main body further comprises a second mounting portion, and the lower body further comprises a second longitudinal beam and a connector. The second mounting portion comprises a third mounting plate, a fourth mounting plate, and a fifth mounting plate. The third mounting plate and the fifth mounting plate are respectively connected to opposite ends of the fourth mounting plate and extend to opposite sides of the fourth mounting plate. The third mounting plate and the fifth mounting plate are configured to connect to the connector such that the third mounting plate, the fourth mounting plate, and the connector surround the second longitudinal beam.

[0015] When the vehicle is involved in a collision or other accident, the torsion box can transfer and disperse stress between the first longitudinal beam and the second longitudinal beam, thereby reducing the deformation of the lower body, reducing the risk of battery cell compression, and improving reliability.

[0016] The third and fourth mounting plates are angled together. When assembling the second longitudinal beam and the torsion box, both the third and fourth mounting plates can be used to mate with the second longitudinal beam, facilitating alignment between the second mounting portion and the second longitudinal beam and simplifying the assembly process. The third and fifth mounting plates provide mounting points for the connector, allowing it to wrap around and fasten the second longitudinal beam with the second mounting portion, enhancing the connection strength between the torsion box and the second longitudinal beam.

[0017] In some embodiments, the lower body also includes a shock tower. A third mounting plate is positioned between the second longitudinal beam and the shock tower and connected to the shock tower and the second longitudinal beam. When the second longitudinal beam is impacted, the impact force is transferred to the shock tower via the third mounting plate, effectively dispersing the impact force, minimizing deformation of the lower body, reducing the risk of battery cell compression, and improving reliability.

[0018] Inserting the third mounting plate between the second longitudinal beam and the shock tower allows the third mounting plate to be connected to both the second longitudinal beam and the shock tower simultaneously, which helps to simplify the assembly process.

[0019] In some embodiments, the lower body also includes an adapter plate connected to the shock tower. The main body also includes a third mounting portion configured to connect to the adapter plate. The third mounting portion provides a connection point for the adapter plate, allowing the shock tower to connect to the third mounting portion via the adapter plate, thereby improving the connection strength between the shock tower and the torque box.

[0020] In some embodiments, the second mounting portion is connected to the third mounting portion. When the vehicle collides, the collision force can be transmitted and dispersed between the second mounting portion and the third mounting portion, thereby reducing the risk of deformation of the torsion box.

[0021] In some embodiments, the first mounting portion and the second mounting portion are respectively located at two ends of the main body. Providing the first mounting portion and the second mounting portion at two ends of the main body prevents the main body from twisting and deforming when the first longitudinal beam or the second longitudinal beam is impacted, thereby improving the torsion box's ability to resist deformation.

[0022] In some embodiments, the first longitudinal beam is used to connect the first cover plate and the second cover plate and forms part of the battery housing. Integrating the first longitudinal beam with the battery housing reduces the number of components, saves space, improves structural efficiency, reduces vehicle weight, and increases driving range.

[0023] In some embodiments, the torsion box further includes an interface connected to the main body, the interface being configured to connect to at least the first crossbeam. In the event of a vehicle collision or other accident, the torsion box can effectively disperse the impact force through the connection between the interface and the first crossbeam, thereby minimizing deformation of the lower vehicle body, reducing the risk of battery cell compression, and improving reliability.

[0024] In some embodiments, the first crossbeam connects the first cover plate and the second cover plate and forms part of the battery housing. Integrating the first crossbeam with the battery housing reduces the number of components, saves space, improves structural efficiency, reduces vehicle weight, and increases range.

[0025] In some embodiments, the lower body further includes a second crossbeam. The interface is further configured to connect to the second crossbeam, which in turn connects to the vehicle's dash panel. In the event of a head-on collision, the torsion box, through its connection to the first longitudinal beam, the first crossbeam, and the second crossbeam, effectively disperses and transfers the impact force on the dash panel to the rear of the lower body, thereby minimizing deformation of the front portion of the lower body and protecting the safety of the driver and passengers within the vehicle.

[0026] In some embodiments, the main body is provided with a mounting hole, and the mounting hole is used to cooperate with a fastener to detachably connect the main body to the upper body of the vehicle.

[0027] By setting the mounting hole, the torque box can realize the detachable connection between the torque box and the upper body, thereby realizing the separation, decoupling and connection between the torque box and the upper body, which is helpful for the maintenance and replacement of the torque box.

[0028] In some embodiments, a recess is provided on a side of the main body facing the upper vehicle body, and a mounting hole is provided on the bottom surface of the recess.

[0029] When assembling the torque box and the upper body, the recess can play a positioning role, helping to align the mounting hole with the matching structure of the upper body, thereby improving assembly efficiency.

[0030] In some embodiments, the main body has a support area for clamping the sealing component with the upper body of the vehicle. Both sides of the support area are provided with mounting holes.

[0031] The main body's support area supports the sealing component, ensuring a seal between the torque box and the upper body, reducing the amount of impurities entering the passenger compartment, improving the passenger experience, and enhancing vehicle reliability. Mounting holes are located on both sides of the support area, meaning that the sealing component has connection points for the torque box and the upper body on both sides. This allows the sealing component to be compressed, improving the airtightness and watertightness of the vehicle interior.

[0032] In some embodiments, the main body further comprises a fourth mounting portion for mounting the vehicle's subframe. Integrating the subframe's mounting point onto the torque box can reduce the number of parts in the vehicle, reduce vehicle weight, and lower vehicle development costs.

[0033] In a second aspect, an embodiment of the present application provides a vehicle chassis, comprising a battery cell and a lower vehicle body provided by any embodiment of the first aspect. The battery cell is housed in a battery box and is located between a first cover plate and a second cover plate.

[0034] In some embodiments, the battery cells are bonded to the first cover plate, which can improve the overall rigidity of the first cover plate and reduce deformation of the first cover plate when the vehicle collides.

[0035] In some embodiments, the first cover is the vehicle floor. By mounting the battery cells on the floor, the floor can also serve as the battery cover, thereby reducing some of the redundant structure of traditional batteries, increasing the vehicle's range, and achieving weight and cost reduction effects.

[0036] In a third aspect, an embodiment of the present application provides a vehicle, comprising the lower body provided by any embodiment of the first aspect.

[0037] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising the chassis provided by any embodiment of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0039] FIG1 is an exploded schematic diagram of a vehicle provided by some embodiments of the present application;

[0040] FIG2 is a partial schematic diagram of a vehicle provided in some embodiments of the present application;

[0041] FIG3 is a schematic structural diagram of a torsion box provided in some embodiments of the present application;

[0042] FIG4 is a schematic structural diagram of the torsion box shown in FIG3 at another angle;

[0043] FIG5 is a schematic structural diagram of the torsion box shown in FIG3 at another angle;

[0044] FIG6 is a schematic top view of the torsion box shown in FIG3 ;

[0045] FIG. 7 is a structural schematic diagram of the torsion box shown in FIG. 3 at another angle.

[0046] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0049] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0053] The term "plurality" used in this application refers to two or more (including two).

[0054] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 80°-90°, they are considered perpendicular; if the angle between two directions is 0°-10°, they are considered parallel.

[0055] In related technologies, a vehicle's torsion box typically connects the vehicle's crossbeams and longitudinal beams to achieve relative fixation between the two beams and improve the continuity of force transmission between them. A vehicle's battery cells are typically first integrated into the battery pack's battery box, which is then installed on the vehicle body along with the battery box.

[0056] The torque box and the battery box are independent of each other and have no connection with each other. This results in a larger number of vehicle parts and a heavier vehicle weight, which affects the vehicle's range.

[0057] In view of this, an embodiment of the present application provides a technical solution that integrates the torque box with the battery box, reduces the number of components, saves space, improves structural efficiency, reduces vehicle weight, and increases cruising range.

[0058] The technical solutions described in the embodiments of this application are applicable to vehicles. The vehicles may be new energy vehicles, which may be pure electric vehicles, hybrid electric vehicles, or extended-range electric vehicles.

[0059] FIG1 is an exploded schematic diagram of a vehicle provided in some embodiments of the present application.

[0060] As shown in Figure 1, a vehicle may include a battery. The battery can not only serve as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0061] In some embodiments, the battery includes a plurality of battery cells 1 .

[0062] The battery cell 1 may include a lithium-ion battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the present embodiment is not limited to this. The battery cell 1 may be cylindrical, flat, rectangular, or other shapes, and the present embodiment is not limited to this.

[0063] In some embodiments, the vehicle includes a vehicle body, and the plurality of battery cells 1 may be mounted on the vehicle body.

[0064] In some embodiments, the vehicle body includes an upper vehicle body 2 and a lower vehicle body 3 connected to the upper vehicle body 2. Exemplarily, the lower vehicle body 3 is detachably connected to the upper vehicle body 2.

[0065] In some embodiments, a plurality of battery cells 1 are mounted on the lower body 3 .

[0066] In some embodiments, the vehicle body includes a torsion box 4. Exemplarily, the lower vehicle body 3 includes the torsion box 4.

[0067] In some embodiments, the lower body 3 includes a first longitudinal beam 31 and a first transverse beam 32 , and the torsion box 4 connects the first longitudinal beam 31 and the first transverse beam 32 .

[0068] In some embodiments, the first longitudinal beam 31 extends along the length direction of the vehicle. For example, the first longitudinal beam 31 may be a rocker beam of the lower body 3 .

[0069] In some embodiments, the first cross member 32 extends in the width direction of the vehicle.

[0070] Figure 2 is a partial schematic diagram of a vehicle provided in some embodiments of the present application; Figure 3 is a structural schematic diagram of a torsion box provided in some embodiments of the present application; Figure 4 is a structural schematic diagram of the torsion box shown in Figure 3 at another angle; Figure 5 is a structural schematic diagram of the torsion box shown in Figure 3 at yet another angle.

[0071] 2 to 5 , the lower body 3 of the embodiment of the present application includes a torsion box 4 , a first longitudinal beam 31 , a first transverse beam 32 , a first cover plate 33 , and a second cover plate 34 .

[0072] The torque box 4 includes a main body 11, a first connecting plate 12, and a second connecting plate 13. The main body 11 connects the first longitudinal beam 31 and the first transverse beam 32. The first connecting plate 12 and the second connecting plate 13 are spaced apart and connected to the main body 11. The first cover plate 33 is connected to the first connecting plate 12, and the second cover plate 34 is connected to the second connecting plate 13. The torque box 4, the first cover plate 33, and the second cover plate 34 form at least a portion of the battery case 5, which is used to accommodate the battery cells 1.

[0073] The first connecting plate 12 may be one or more. For example, there is one first connecting plate 12. The second connecting plate 13 may be one or more. For example, there is one second connecting plate 13.

[0074] Exemplarily, the first connecting plate 12 and the second connecting plate 13 protrude from the main body 11 , and the two may form a double-layer flange structure.

[0075] The embodiment of the present application does not limit the connection method between the first connecting plate 12 and the first cover plate 33. For example, the first connecting plate 12 can be connected to the first cover plate 33 by welding, bonding, fastener connection or other methods.

[0076] The embodiment of the present application does not limit the connection method between the second connecting plate 13 and the second cover plate 34. For example, the second connecting plate 13 can be connected to the second cover plate 34 by welding, bonding, fastener connection or other methods.

[0077] The battery case 5 can be used to accommodate multiple battery cells 1. The battery case 5 can protect the battery cells 1 from the outside, thereby improving the reliability of the battery cells 1.

[0078] Exemplarily, the battery box 5 has a receiving cavity 51, and a plurality of battery cells 1 can be received in the receiving cavity 51. The torsion box 4, the first cover plate 33, the second cover plate 34 and other components of the vehicle are used to define the receiving cavity 51.

[0079] In an embodiment of the present application, by providing a first connecting plate 12 and a second connecting plate 13 on the torque box 4, the torque box 4 can be connected to the first cover plate 33 and the second cover plate 34 of the vehicle, so that the torque box 4 is integrated with the battery box 5, thereby reducing the number of parts, saving space, improving structural efficiency, reducing vehicle weight, and increasing cruising range.

[0080] In some embodiments, the first connecting plate 12 and the second connecting plate 13 are arranged along the height direction of the vehicle. For example, in the vehicle, the first connecting plate 12 can be located above the second connecting plate 13; correspondingly, the first cover plate 33 can be an upper cover plate, and the second cover plate 34 can be a lower cover plate.

[0081] In some embodiments, the first connecting plate 12 and the first cover plate 33 may be connected by rotary tapping rivets (FDS).

[0082] In some embodiments, the first connecting plate 12 and the first cover plate 33 are bonded together by a colloid, which can seal the gap between the first connecting plate 12 and the first cover plate 33 and improve the airtightness and watertightness of the battery box 5 .

[0083] Exemplarily, at least a portion of the colloid is disposed between the first connecting plate 12 and the first cover plate 33 .

[0084] Exemplarily, the first connecting plate 12 and the first cover plate 33 are bonded together by structural adhesive.

[0085] In some embodiments, the second connecting plate 13 and the second cover plate 34 may be connected by rotary tapping rivets (FDS).

[0086] In some embodiments, the second connecting plate 13 and the second cover plate 34 are bonded together by a colloid, which can seal the gap between the second connecting plate 13 and the second cover plate 34 and improve the airtightness and watertightness of the battery box 5 .

[0087] Exemplarily, at least a portion of the colloid is disposed between the second connecting plate 13 and the second cover plate 34 .

[0088] Exemplarily, the second connecting plate 13 and the second cover plate 34 are bonded together by structural adhesive.

[0089] In some embodiments, the first connecting plate 12 is in the shape of a flat plate.

[0090] In some embodiments, the second connecting plate 13 is in the shape of a flat plate.

[0091] In some embodiments, in a vehicle, the first cover plate 33 is overlapped on the first connecting plate 12 from the side of the first connecting plate 12 facing away from the second connecting plate 13 , and the second cover plate 34 is overlapped on the second connecting plate 13 from the side of the second connecting plate 13 facing away from the first connecting plate 12 .

[0092] In some embodiments, the torsion box 4 includes a reinforcing rib plate 14 , which is connected between the first connecting plate 12 and the second connecting plate 13 .

[0093] In some embodiments, a first mounting portion 111 is provided at one end of the main body 11 , and the first mounting portion 111 is used to connect to the first longitudinal beam 31 of the vehicle.

[0094] The first longitudinal beam 31 may be a beam extending along the length direction of the vehicle. The present application does not limit the specific position of the first longitudinal beam 31. For example, the first longitudinal beam 31 may be a rocker beam, a front longitudinal beam, or a rear longitudinal beam of the lower body 3.

[0095] When the vehicle is involved in a collision or other accident, the torsion box 4 can effectively disperse the collision force by virtue of the connection between the main body 11 and the first longitudinal beam 31, thereby reducing the deformation of the lower body 3, reducing the risk of the battery cell 1 being compressed, and improving reliability.

[0096] In some embodiments, the first longitudinal beam 31 is used to connect the first cover plate 33 and the second cover plate 34 and forms a part of the battery box 5 .

[0097] The embodiment of the present application integrates the first longitudinal beam 31 with the battery box 5, thereby reducing the number of components, saving space, improving structural efficiency, reducing vehicle weight, and increasing cruising range.

[0098] In some embodiments, the vehicle includes a first cross member 32 , and the torsion box 4 is further used to connect the first cross member 32 .

[0099] In some embodiments, the vehicle includes two first longitudinal beams 31 and two first transverse beams 32 .

[0100] In some embodiments, the first longitudinal beam 31 extends along a first direction X, and the first transverse beam 32 extends along a second direction Y, where the first direction X is perpendicular to the second direction Y. Exemplarily, the first direction X is parallel to the length direction of the vehicle, and the second direction Y is parallel to the width direction of the vehicle.

[0101] The two first longitudinal beams 31 may be spaced apart along the second direction Y, and the two first transverse beams 32 may be spaced apart along the first direction X.

[0102] In some embodiments, the vehicle may include four torsion boxes 4, with each first cross beam 32 connected to two first longitudinal beams 31 via two torsion boxes 4. The torsion boxes 4 can achieve relative fixation between the first cross beam 32 and the first longitudinal beam 31, improving the continuity of force transmission between the first cross beam 32 and the first longitudinal beam 31.

[0103] In some embodiments, the first cover plate 33 is connected to the two first longitudinal beams 31, the two first transverse beams 32, and the four torsion boxes 4, and the second cover plate 34 is connected to the two first longitudinal beams 31, the two first transverse beams 32, and the four torsion boxes 4. The two first longitudinal beams 31, the two first transverse beams 32, and the four torsion boxes 4 enclose a receiving cavity 51 for accommodating the battery cells 1.

[0104] In some embodiments, the two torque boxes 4 near the front of the vehicle may be referred to as front torque boxes, and the two torque boxes 4 near the rear of the vehicle may be referred to as rear torque boxes.

[0105] In some embodiments, the first longitudinal beam 31 may be a rocker beam of the lower vehicle body 3 .

[0106] In some embodiments, the first mounting portion 111 includes a first mounting plate 111a and a second mounting plate 111b connected to the first connecting plate 12. The second mounting plate 111b forms a predetermined angle with the first mounting plate 111a. At least one of the first mounting plate 111a and the second mounting plate 111b is configured to connect to the first longitudinal beam 31.

[0107] The second mounting plate 111b is arranged to intersect with the first mounting plate 111a. For example, the preset angle is α, 0°<α≤90°.

[0108] In the embodiment of the present application, the first mounting plate 111a may be connected to the first longitudinal beam 31, the second mounting plate 111b may be connected to the first longitudinal beam 31, or both the first mounting plate 111a and the second mounting plate 111b may be connected to the first longitudinal beam 31.

[0109] When assembling the first longitudinal beam 31 and the torsion box 4, both the first mounting plate 111a and the second mounting plate 111b can be used to fit with the first longitudinal beam 31, which can help to achieve positioning between the first mounting portion 111 and the first longitudinal beam 31 and simplify the assembly process.

[0110] In some embodiments, the first mounting plate 111a is attached to and connected to the first longitudinal beam 31, and the second mounting plate 111b is attached to the first longitudinal beam 31. The second mounting plate 111b plays a positioning role, while the first mounting plate 111a plays a fixed connection role.

[0111] Illustratively, the first mounting plate 111 a is connected to the first longitudinal beam 31 by fasteners (eg, bolts).

[0112] For example, the first mounting plate 111 a is provided with holes for the bolts to pass through, while the second mounting plate 111 b is not provided with holes.

[0113] In some embodiments, the second mounting plate 111b is perpendicular to the first mounting plate 111a. An L-shaped contact surface can be formed between the first longitudinal beam 31 and the first mounting portion 111, which helps to simplify the shape requirements of the first longitudinal beam 31 and improve the connection strength between the first longitudinal beam 31 and the first mounting portion 111.

[0114] In some embodiments, the first mounting plate 111a is located at one end of the main body 11 along the first direction X. The first connecting plate 12 and the second mounting plate 111b are respectively connected to two opposing surfaces of the first mounting plate 111a along the second direction Y. The second mounting plate 111b is perpendicular to the third direction Z. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0115] For example, the third direction Z may be parallel to the height direction of the vehicle.

[0116] Exemplarily, the first mounting plate 111 a is substantially flat and perpendicular to the second direction Y.

[0117] Exemplarily, the second mounting plate 111 b is substantially flat and perpendicular to the third direction Z.

[0118] The second mounting plate 111 b and the first connecting plate 12 may be connected to the first mounting plate 111 a from both sides thereof, respectively, which may reduce the risk of interference between the second mounting plate 111 b and the first connecting plate 12 .

[0119] In some embodiments, the main body 11 is further provided with a second mounting portion 112 , and the lower body 3 further includes a second longitudinal beam 36 . The second mounting portion 112 is at least used to connect with the second longitudinal beam 36 .

[0120] The present embodiment does not limit the position of the second longitudinal beam 36. In some examples, the first longitudinal beam 31 is a door sill beam, the second longitudinal beam 36 is a front longitudinal beam, and accordingly, the torque box 4 is a front torque box; in other examples, the first longitudinal beam 31 is a door sill beam, the second longitudinal beam 36 is a rear longitudinal beam, and accordingly, the torque box 4 is a rear torque box; in still other examples, the first longitudinal beam 31 is a front longitudinal beam, and the second longitudinal beam 36 is a door sill beam.

[0121] When the vehicle is involved in a collision or other accident, the torsion box 4 can transfer and disperse stress between the first longitudinal beam 31 and the second longitudinal beam 36, thereby reducing deformation of the lower vehicle body, reducing the risk of pressure on the battery cell 1, and improving reliability.

[0122] In some embodiments, the first mounting portion 111 and the second mounting portion 112 are respectively located at two ends of the main body 11. For example, the first mounting portion 111 and the second mounting portion 112 are respectively located at two ends of the main body 11 along the first direction X.

[0123] The first mounting portion 111 and the second mounting portion 112 are arranged at both ends of the main body 11 . When the first longitudinal beam 31 or the second longitudinal beam 36 is impacted, the main body 11 is not easily twisted and deformed, thereby improving the deformation resistance of the torsion box 4 .

[0124] In some embodiments, the torsion box 4 is a front torsion box, the first longitudinal beam 31 is a door sill beam, and the second longitudinal beam 36 is a front longitudinal beam. The torsion box 4 can connect the front cabin of the vehicle to the battery box 5.

[0125] When the vehicle collides head-on, the torsion box 4 can effectively disperse and transmit the collision force to the rear of the lower body by virtue of its connection with the first longitudinal beam 31 and the second longitudinal beam 36, thereby reducing the deformation of the front of the lower body and protecting the safety of the driver and passengers in the vehicle.

[0126] In some embodiments, the lower body 3 includes a second longitudinal beam 36 and a connecting member 37 .

[0127] In some embodiments, the second mounting portion 112 includes a third mounting plate 112a, a fourth mounting plate 112b, and a fifth mounting plate 112c. The third mounting plate 112a and the fifth mounting plate 112c are respectively connected to opposite ends of the fourth mounting plate 112b and extend to opposite sides of the fourth mounting plate 112b. The third mounting plate 112a and the fifth mounting plate 112c are configured to connect to the connector 37, so that the third mounting plate 112a, the fourth mounting plate 112b, and the connector 37 surround the second longitudinal beam 36.

[0128] The third mounting plate 112a and the fourth mounting plate 112b are angled together. When assembling the second longitudinal beam 36 and the torque box 4, both the third mounting plate 112a and the fourth mounting plate 112b can be used to mate with the second longitudinal beam 36. This helps to position the second mounting portion 112 and the second longitudinal beam 36, simplifying the assembly process. The third mounting plate 112a and the fifth mounting plate 112c provide mounting points for the connector 37, allowing the connector 37 to wrap around and fasten the second longitudinal beam 36 with the second mounting portion 112, thereby increasing the strength of the connection between the torque box 4 and the second longitudinal beam 36.

[0129] In some embodiments, the third mounting plate 112a is perpendicular to the fourth mounting plate 112b. In some embodiments, the fifth mounting plate 112c is perpendicular to the fourth mounting plate 112b.

[0130] In some embodiments, the fourth mounting plate 112b is perpendicular to the third direction Z.

[0131] In some embodiments, the third mounting plate 112a and the fifth mounting plate 112c are both provided with holes for bolts to pass through.

[0132] In some embodiments, the lower body 3 further includes a shock absorbing tower 38 .

[0133] In some embodiments, the second mounting portion 112 is also used to connect the shock tower 38 to the second longitudinal rail 36 .

[0134] When the second longitudinal beam 36 is impacted, the collision force can be transmitted to the shock tower 38 through the second mounting portion 112 , thereby effectively dispersing the collision force, reducing deformation of the lower vehicle body, lowering the risk of compression of the battery cell 1 , and improving reliability.

[0135] In some embodiments, the second mounting portion 112 includes a third mounting plate 112 a , which is configured to be disposed between the second longitudinal beam 36 and the shock tower 38 and connected to the shock tower 38 and the second longitudinal beam 36 .

[0136] Inserting the third mounting plate 112 a between the second longitudinal beam 36 and the shock tower 38 allows the third mounting plate 112 a to be connected to the second longitudinal beam 36 and the shock tower 38 at the same time, which helps to simplify the assembly process.

[0137] In some embodiments, the bolts pass through the shock tower 38 and the third mounting plate 112 a and are connected to the second longitudinal rail 36 .

[0138] In some embodiments, the lower body 3 further includes an adapter plate 39 connected to the shock tower 38 .

[0139] In some embodiments, the main body 11 further includes a third mounting portion 113 , which is used to connect to the adapter plate 39 .

[0140] By providing the third mounting portion 113 , a connection point can be provided for the adapter plate 39 , so that the shock tower 38 is connected to the third mounting portion 113 through the adapter plate 39 , thereby improving the connection strength between the shock tower 38 and the torque box 4 .

[0141] In some embodiments, a support plate 115 is provided on one side of the main body 11 along the third direction Z, and the third mounting portion 113 includes a flange structure bent relative to the support plate 115 .

[0142] In some embodiments, the second mounting portion 112 is connected to the third mounting portion 113. When the vehicle collides, the collision force can be transmitted and dispersed between the second mounting portion 112 and the third mounting portion 113, thereby reducing the risk of deformation of the torsion box 4.

[0143] In some embodiments, the third mounting portion 113 is directly connected to the third mounting plate 112 a .

[0144] In some embodiments, the torsion box 4 further includes an interface 15 connected to the main body 11 , and the interface 15 is at least used to connect to the first crossbeam 32 .

[0145] When the vehicle is involved in a collision or other accident, the torsion box 4 can effectively disperse the collision force by virtue of the connection between the interface 15 and the first crossbeam 32, thereby reducing the deformation of the lower body 3, reducing the risk of the battery cell 1 being compressed, and improving reliability.

[0146] In some embodiments, the first crossbeam 32 is used to connect the first cover plate 33 and the second cover plate 34 and forms a part of the battery box 5 .

[0147] The embodiment of the present application integrates the first crossbeam 32 with the battery box 5, thereby reducing the number of components, saving space, improving structural efficiency, reducing vehicle weight, and increasing cruising range.

[0148] In some embodiments, the interface 15 is a flange structure protruding from the main body 11 .

[0149] In some embodiments, the interface 15 is located on one side of the main body 11 along the second direction Y.

[0150] In some embodiments, the interface 15 and the first crossbeam 32 are connected by rotary tapping rivets (FDS) and welding.

[0151] In some embodiments, the lower body 3 further includes a second cross beam 35 .

[0152] In some embodiments, the interface 15 is further configured to connect to a second cross member 35 , and the second cross member 35 is configured to connect to the front panel 21 of the vehicle.

[0153] When the vehicle is involved in a head-on collision, the torsion box 4 can effectively disperse and transmit the collision force on the front panel 21 to the rear part of the lower body by virtue of its connection with the first longitudinal beam 31, the first cross beam 32 and the second cross beam 35, thereby reducing the deformation of the front part of the lower body and protecting the safety of the driver and passengers in the vehicle.

[0154] In some embodiments, the interface 15 and the second cross beam 35 are connected by rotary tapping rivets (FDS) and welding.

[0155] In some embodiments, in a vehicle, the second cross member 35 is located on an upper side of the first cross member 32 .

[0156] In some embodiments, the second beam 35 is connected to the first beam 32 .

[0157] In some embodiments, the main body 11 is provided with a mounting hole 116 , and the mounting hole 116 is used to cooperate with a fastener to detachably connect the main body 11 to the upper body 2 of the vehicle.

[0158] For example, the mounting hole 116 can be a plain hole or a threaded hole, a through hole or a blind hole.

[0159] Illustratively, the fastener may include at least one of a bolt, a stud, a screw, and a pin.

[0160] There can be one or more mounting holes 116 .

[0161] By providing the mounting hole 116 , the torque box 4 can be detachably connected to the upper vehicle body 2 , thereby achieving separation, decoupling, and connection between the torque box 4 and the upper vehicle body 2 , which is helpful for maintenance and replacement of the torque box 4 .

[0162] In some embodiments, a recess 117 is provided on a side of the main body 11 facing the upper vehicle body 2. A mounting hole 116 is provided on a bottom surface 117a of the recess.

[0163] There can be one or more recesses 117 . In some examples, there are multiple recesses 117 , and a mounting hole 116 is provided on a bottom surface 117 a of at least one recess.

[0164] When assembling the torque box 4 and the upper body 2 , the recess 117 can play a positioning role, helping to make the mounting hole 116 face the matching structure of the upper body 2 to improve assembly efficiency.

[0165] In some embodiments, the bottom surface 117a of the recess is perpendicular to the height direction of the vehicle. During assembly, the upper body 2 can be moved along the height direction to abut against the bottom surface 117a of the recess, which can simplify the assembly process.

[0166] FIG6 is a schematic top view of the torsion box shown in FIG3 .

[0167] As shown in Figures 1 and 6, the main body 11 has a support area 118, which is used to clamp the sealing component 6 with the upper body 2 of the vehicle. Mounting holes 116 are provided on both sides of the support area 118.

[0168] By way of example, the support plate 115 has a support region 118 .

[0169] For example, the sealing member 6 can achieve sealing by compression deformation. The present embodiment does not limit the material of the sealing member 6; for example, the sealing member 6 can be made of an elastic and compressible material, such as rubber, foam, etc.

[0170] The support area 118 of the main body 11 supports the sealing component 6, ensuring a seal between the torque box 4 and the upper body 2. This reduces the amount of impurities that enter the passenger compartment, improves the passenger experience, and enhances vehicle reliability. Mounting holes 116 are provided on both sides of the support area 118, meaning that both sides of the sealing component 6 provide connection points for the torque box 4 and the upper body 2. This allows the sealing component 6 to be compressed, improving the airtightness and watertightness of the vehicle interior.

[0171] FIG. 7 is a structural schematic diagram of the torsion box shown in FIG. 3 at another angle.

[0172] As shown in FIG. 7 , in some embodiments, the main body 11 is further provided with a fourth mounting portion 114 , and the fourth mounting portion 114 is used for mounting a sub-frame of a vehicle.

[0173] The embodiment of the present application integrates the mounting point of the subframe into the torsion box 4 , which can reduce the number of parts in the entire vehicle product, reduce the weight of the entire vehicle, and lower the development cost of the entire vehicle.

[0174] In some embodiments, the fourth mounting portion 114 is disposed on a side of the main body 11 away from the third mounting portion 113. Alternatively, in a vehicle, the fourth mounting portion 114 is disposed on a side of the main body 11 facing the ground.

[0175] In some embodiments, the subframe may be connected to the fourth mounting portion 114 by bolts.

[0176] 1 and 2 , the present embodiment further provides a chassis 7 , which includes the lower vehicle body 3 of any of the aforementioned embodiments. The battery cell 1 is housed in the battery box 5 and is located between the first cover plate 33 and the second cover plate 34 .

[0177] The battery cell 1 can be the smallest unit that can independently realize charging and discharging. The battery cell 1 can include a lithium-ion secondary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of the present application are not limited to this. The battery cell can be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of the present application are not limited to this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited to this.

[0178] The embodiment of the present application utilizes the torsion box 4, first cover plate 33, and second cover plate 34 of the chassis 7 to integrate the components with the battery housing 5, thereby reducing the number of components, saving space, improving structural efficiency, reducing vehicle weight, and increasing driving range. In other words, the embodiment of the present application integrates the battery cell 1 onto the chassis 7, achieving CTC (Cell to Chassis) battery-chassis integration.

[0179] In some embodiments, the lower body 3 is detachably connected to the upper body 2. The upper body 2 and the lower body 3 can be separated, decoupled, and connected, thereby enabling independent development of the upper body 2 and the lower body 3. This allows the upper body 2 and the lower body 3 to be replaced as needed, shortening the development cycle and reducing costs.

[0180] One lower vehicle body 3 can match upper vehicle bodies 2 of different shapes to meet users' demands for diversified shapes.

[0181] In some embodiments, the chassis 7 may further include a drive system and a chassis system, wherein the chassis system includes a transmission system, a travel system, a steering system, and a braking system. The drive system may include a motor.

[0182] The embodiment of the present application integrates the battery system, drive system and chassis system together, reducing the number of components, saving space, improving structural efficiency, and significantly reducing vehicle weight and increasing battery life.

[0183] The chassis 7 of the present embodiment is highly adaptable, offering improved compatibility with the vehicle and enabling rapid and flexible mass production. Its high degree of integration and modularity allows for cross-platform adaptation to future vehicle models of all levels and types. Furthermore, this high degree of integration and modularity simplifies the number of parts and production steps, reducing costs while increasing battery capacity and range.

[0184] By setting up an independent lower body 3, the complete chassis system, battery system and drive system can be integrated on the lower body 3, so that the entire chassis 7 can be designed and operated independently of the upper body 2, and the drive part and passenger compartment of the whole vehicle can be developed and assembled independently of each other.

[0185] In some embodiments, the vehicle further includes a vehicle interior, a human-computer interaction system, and an entertainment system mounted on the upper body 2. In the embodiment of the present application, the vehicle interior, the human-computer interaction system, and the entertainment system can be developed independently of the chassis 7.

[0186] In some embodiments, the battery cell 1 is adhered to the first cover plate 33 .

[0187] Adhere the battery cell 1 to the first cover plate 33 , and further improve the overall rigidity of the first cover plate 33 , thereby reducing deformation of the first cover plate 33 when the vehicle collides.

[0188] In some embodiments, the first cover panel 33 is a floor panel of the vehicle.

[0189] The battery cell 1 is installed on the floor so that the floor can also be used as a cover for the battery, thereby reducing some redundant structures of traditional batteries, improving the vehicle's cruising range, and achieving the effect of reducing weight and cost.

[0190] An embodiment of the present application further provides a vehicle, which includes the lower vehicle body 3 provided in any of the aforementioned embodiments.

[0191] An embodiment of the present application further provides a vehicle, which includes the chassis 7 provided by any of the aforementioned embodiments.

[0192] In some embodiments, the vehicle includes an upper body 2 and a sealing member 6. The upper body 2 is connected to the lower body 3, and the sealing member 6 is sandwiched between the upper body 2 and the lower body 3.

[0193] The sealing component 6 may have the advantages of being dustproof, waterproof, soundproof, wear-resistant, and easy to maintain.

[0194] In some embodiments, the upper body 2 is detachably connected to the lower body 3. For example, the upper body 2 is detachably connected to the lower body 3 via bolts.

[0195] 2 to 7 , an embodiment of the present application provides a torque box 4, which includes a main body 11, a first connecting plate 12, and a second connecting plate 13. The first connecting plate 12 and the second connecting plate 13 are spaced apart and connected to the main body 11. The first connecting plate 12 is used to connect to a first cover plate 33 of the vehicle, and the second connecting plate 13 is used to connect to a second cover plate 34 of the vehicle. The torque box 4, the first cover plate 33, and the second cover plate 34 are used to form at least a portion of the battery case 5.

[0196] 2 to 7 , an embodiment of the present application provides a lower vehicle body 3 , which includes a first longitudinal beam 31 , a first transverse beam 32 , a first cover plate 33 , a second cover plate 34 , a second transverse beam 35 , a second longitudinal beam 36 , a shock tower 38 , an adapter plate 39 and a torsion box 4 .

[0197] The torque box 4 includes a main body 11 , a first connecting plate 12 , a second connecting plate 13 and an interface 15 .

[0198] The first connecting plate 12 and the second connecting plate 13 are spaced apart and connected to the main body 11. The first connecting plate 12 is used to connect to the first cover plate 33 of the vehicle, and the second connecting plate 13 is used to connect to the second cover plate 34 of the vehicle.

[0199] The main body 11 includes a first mounting portion 111, a second mounting portion 112, a third mounting portion 113, and a fourth mounting portion 114. The first mounting portion 111 and the second mounting portion 112 are respectively located at opposite ends of the main body 11 along a first direction X. The first mounting portion 111 is configured to connect to the first longitudinal beam 31 of the vehicle, while the second mounting portion 112 is configured to connect to the second longitudinal beam 36 and the shock tower 38 of the vehicle. Optionally, the first direction X is parallel to the longitudinal direction of the vehicle, the first longitudinal beam 31 comprises a rocker beam of the lower body 3, and the second longitudinal beam 36 comprises a front longitudinal beam of the lower body 3.

[0200] The third mounting portion 113 is used to connect to the adapter plate 39 connected to the shock tower 38. The fourth mounting portion 114 is used to install the subframe of the vehicle.

[0201] The interface 15 is provided on one side of the main body 11 along the second direction Y, and is used to connect to the first crossbeam 32 and the second crossbeam 35 of the vehicle. The second crossbeam 35 is connected to the dash panel 21 of the vehicle.

[0202] The torsion box 4 , the first cover plate 33 , the second cover plate 34 , the first longitudinal beam 31 and the first transverse beam 32 are used to form at least a portion of the battery box 5 .

[0203] The side of the main body 11 facing the upper body 2 is provided with a recess 117. The bottom surface 117a of the recess is provided with a mounting hole 116. The mounting hole 116 is used to cooperate with a fastener to detachably connect the main body 11 to the upper body 2 of the vehicle.

[0204] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0205] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A lower body of a vehicle, comprising: First beam; First longitudinal beam; The torsion box comprises a main body, a first connecting plate and a second connecting plate, wherein the main body is connected to the first cross beam and the first longitudinal beam, and the first connecting plate and the second connecting plate are arranged at intervals and connected to the main body; A first cover plate connected to the first connecting plate; as well as The second cover plate is connected to the second connecting plate. The torsion box, the first cover plate and the second cover plate form at least a part of a battery box, and the battery box is used to accommodate battery cells.

2. The lower vehicle body according to claim 1, wherein: A first mounting portion is provided at one end of the main body, wherein the first mounting portion includes a first mounting plate and a second mounting plate connected to the first connecting plate, and a preset angle is formed between the second mounting plate and the first mounting plate; At least one of the first mounting plate and the second mounting plate is used to connect with the first longitudinal beam.

3. The lower vehicle body according to claim 2, wherein: The second mounting plate is perpendicular to the first mounting plate.

4. The lower vehicle body according to claim 2 or 3, wherein: The first mounting plate is located at one end of the main body along the first direction; The first connecting plate and the second mounting plate are respectively connected to two surfaces of the first mounting plate that are opposite to each other along the second direction; The second mounting plate is perpendicular to the third direction; The first direction, the second direction and the third direction are perpendicular to each other.

5. The lower vehicle body according to any one of claims 2 to 4, wherein: The main body is further provided with a second mounting portion, and the lower body further comprises a second longitudinal beam and a connecting member; The second mounting portion includes a third mounting plate, a fourth mounting plate and a fifth mounting plate; The third mounting plate and the fifth mounting plate are respectively connected to two ends of the fourth mounting plate, and respectively extend to opposite sides of the fourth mounting plate; The third mounting plate and the fifth mounting plate are used to be connected to the connecting member, so that the third mounting plate, the fourth mounting plate and the connecting member surround the second longitudinal beam.

6. The lower vehicle body according to claim 5, further comprising a shock tower; The third mounting plate is used to be disposed between the second longitudinal beam and the shock absorbing tower and connected to the shock absorbing tower and the second longitudinal beam.

7. The lower vehicle body according to claim 6, further comprising an adapter plate connected to the shock tower; The main body also includes a third mounting portion, and the third mounting portion is used to be connected to the adapter plate.

8. The lower vehicle body according to claim 7, wherein: The second mounting portion is connected to the third mounting portion.

9. The lower vehicle body according to any one of claims 5 to 8, wherein: The first mounting portion and the second mounting portion are respectively located at two ends of the main body.

10. The lower vehicle body according to any one of claims 1 to 9, wherein: The first longitudinal beam is used to connect the first cover plate and the second cover plate, and forms a part of the battery box.

11. The lower vehicle body according to any one of claims 1 to 10, wherein: The torsion box further includes an interface connected to the main body, and the interface is at least used to connect to the first beam.

12. The lower vehicle body according to claim 11, wherein: The first cross beam is used to connect the first cover plate and the second cover plate, and forms a part of the battery box.

13. The lower vehicle body according to claim 11 or 12, further comprising a second cross beam; The interface is also used to connect with the second cross beam, and the second cross beam is used to connect with the front panel of the vehicle.

14. The lower vehicle body according to any one of claims 1 to 13, wherein: The main body is provided with a mounting hole, and the mounting hole is used to cooperate with a fastener to detachably connect the main body to the upper body of the vehicle.

15. The lower vehicle body according to claim 14, wherein: A concave portion is provided on one side of the main body facing the upper vehicle body; The bottom surface of the recess is provided with the mounting hole.

16. The lower vehicle body according to claim 14 or 15, wherein: The main body has a support area, and the support area is used to clamp the sealing component with the upper body of the vehicle; The mounting holes are arranged on both sides of the supporting area.

17. The lower vehicle body according to any one of claims 1 to 16, wherein: The main body is further provided with a fourth mounting portion, and the fourth mounting portion is used for mounting a sub-frame of a vehicle.

18. A chassis of a vehicle, comprising: The lower vehicle body according to any one of claims 1 to 17; A battery cell is contained in the battery box and is located between the first cover plate and the second cover plate.

19. The chassis of claim 18, wherein: The battery cell is bonded to the first cover plate.

20. A chassis according to claim 18 or 19, wherein: The first cover plate is a floor of the vehicle.

21. A vehicle comprising an underbody according to any one of claims 1-17 or a chassis according to any one of claims 18-20.

Images