Ctc structure vehicle body and vehicle

Abstract

The application discloses a CTC structure vehicle body and a vehicle, wherein the CTC structure vehicle body comprises a lower vehicle body platform and a battery device; the lower vehicle body platform comprises a front wall assembly, a front floor panel and a rear floor panel; the battery device comprises a lower tray and a battery pack, the lower tray comprises a disc body and a surrounding edge arranged above the periphery of the disc body, the disc body and the surrounding edge are surrounded to form a cavity for accommodating the battery pack, and the front floor panel is connected to the upper end of the surrounding edge to close the cavity; wherein: the side edge of the front floor panel close to the front wall assembly extends to the outside of the surrounding edge and is sealingly connected to at least one lower surface of the front wall assembly. On the one hand, the application can reduce the influence of other components welded on the front floor panel on the sealing part, and on the other hand, the sealing part of the front floor panel, the corresponding front wall assembly and the rear floor panel can be built-in to improve the sealing effect.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a CTC structure vehicle body and vehicle. Background Technology

[0002] CTC (Cell-to-Chassis) battery-chassis integrated technology is a disruptive innovation in the field of new energy vehicles. By directly integrating the battery cells into the vehicle chassis structure, it eliminates the traditional battery pack and module, achieving a high degree of integration between the battery system and the vehicle chassis; it can improve the range, performance and space utilization of electric vehicles.

[0003] In some technologies, the upper surface of the CTC chassis needs to be sealed with PVC glue. Since other components need to be welded to the large surface of the CTC chassis, the coating difficulty of sealing the upper surface of the CTC chassis with PVC glue is increased, which increases the sealing difficulty of the battery device. Summary of the Invention

[0004] This application provides a CTC structure body and vehicle, which aims to improve the problem of the difficulty in sealing battery devices.

[0005] To achieve the above-mentioned technical effects, one technical solution adopted in this application is: to provide a CTC structure vehicle body, including an underbody platform and a battery device; The underbody platform includes the front bulkhead assembly, the front floor panel, and the rear floor panel; The battery assembly includes a lower tray and a battery pack. The lower tray includes a tray body and a surrounding edge above the periphery of the tray body. The tray body and the surrounding edge together form a cavity for accommodating the battery pack. A front floor panel cover is connected to the upper end of the surrounding edge to close the cavity. The front floor panel extends to the outside of the front bulkhead assembly along one edge and is sealed to at least one lower surface of the front bulkhead assembly; and / or, the front floor panel extends to the outside of the rear floor panel along one edge and is sealed to at least one lower surface of the rear floor panel.

[0006] This application simplifies the CTC (Continuous Turbine Control) vehicle body structure by using a front floor panel that covers the lower tray of the battery unit and connects to the perimeter of the lower tray, allowing the front floor panel to replace the upper cover of the battery unit. By extending the edge of the front floor panel to the outside of the perimeter, it is convenient to directly seal the edge of the front floor panel with the corresponding front bulkhead assembly and rear floor panel. Only the edge of the front floor panel needs to be sealed with the corresponding front bulkhead assembly and rear floor panel. This reduces the impact of other components welded to the front floor panel on the sealing area and allows the sealing area between the front floor panel and the corresponding front bulkhead assembly and rear floor panel to be built-in, thereby improving the sealing effect.

[0007] The front floor panel extends from one edge near the front bulkhead assembly to the outer side of the bulkhead; the front floor panel is also fixedly connected to the front bulkhead assembly via a first connecting part, wherein: In the vertical projection of the first connecting part and the surrounding edge on the front floor panel, the projection of the first connecting part is located inside the projection of the surrounding edge.

[0008] The front floor panel and the front bulkhead assembly are welded together to form the first connection.

[0009] The front floor panel extends to the outer edge of the perimeter along one side of the rear floor panel; the front floor panel is also fixedly connected to the rear floor panel via a second connecting part, wherein: In the vertical projection of the second connecting part and the surrounding edge on the front floor panel, the projection of the second connecting part is located inside the projection of the surrounding edge.

[0010] The front floor panel and the rear floor panel are welded together to form a second connection.

[0011] The lower platform also includes two sill beams, which connect the front bulkhead assembly 10 and the rear floor panel. The front bulkhead assembly 10, the rear floor panel, and the two sill beams together form a ring-shaped main load-bearing frame. The sill beam extends at least partially over the front floor panel; the edge of the front floor panel near the sill beam extends to the outside of the edging and is sealed to the sill beam.

[0012] The front floor panel is also fixedly connected to the door sill beam via a third connecting part.

[0013] In the vertical projection of the third connecting part and the surrounding edge on the front floor panel, the projection of the third connecting part is located outside the projection of the surrounding edge.

[0014] A sealing layer is provided between the perimeter and the front floor panel.

[0015] This application also proposes a vehicle including a CTC structure body as described in any of the above. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a CTC structure vehicle body embodiment of this application; Figure 2 This is a schematic diagram of another embodiment of the CTC structure vehicle body of this application; Figure 3 This is a schematic diagram of another embodiment of the CTC structure vehicle body of this application; Figure 4 This is a structural schematic diagram of yet another embodiment of the CTC structure vehicle body of this application.

[0018] Among them: 1000, CTC structure body; 100. Submersible platform; 10. Front bulkhead assembly; 11. Lower front bulkhead panel; 12. Front bulkhead reinforcing plate; 20. Front floor panel; 21. First connecting part; 22. Second connecting part; 23. Third connecting part; 24. First sealing part; 25. Second sealing part; 26. Third sealing part; 30. Rear floor panel; 31. Rear reinforcement plate; 40. Threshold beam; 41. Inner sill plate; 42. Outer sill plate; 43. Fasteners; 200. Battery assembly; 210. Lower tray; 211. Tray body; 212. Surrounding edge; 220. Battery pack; 230. Sealing layer. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" in this application description should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document based on the specific circumstances.

[0021] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0022] In a CTC integrated body structure, the front floor panel generally needs to integrate several components such as seat mounting points, central tunnel, reinforcements, foot pedal reinforcement plates, sound insulation pads, damping rubber, carpets, wiring harness brackets, wire channels, air ducts, and pedal mounting area reinforcement plates. When the battery device is installed on the integrated structure, sealing the edge of the front floor panel from above can easily lead to seal failure due to the influence of a large number of components, affecting the use of the battery device.

[0023] This application addresses the aforementioned problems by proposing a CTC (Continuous Tolerance Control) structure body, which can be used in new energy vehicles. The CTC structure body includes a lower body platform and a battery device. The lower body platform includes a front bulkhead assembly, a front floor panel, and a rear floor panel. The battery device includes a lower tray and a battery pack. The lower tray includes a disc body and a surrounding edge above the periphery of the disc body. The disc body and the surrounding edge form a cavity for accommodating the battery pack. The front floor panel cover is connected to the upper end of the surrounding edge to close the cavity. The front floor panel extends to the outside of the surrounding edge on one side near the front bulkhead assembly and is sealed to at least one lower surface of the front bulkhead assembly. And / or, the front floor panel extends to the outside of the surrounding edge on one side near the rear floor panel and is sealed to at least one lower surface of the rear floor panel. This application extends the front bulkhead panel to the outside of the bulkhead and the front floor panel to the lower surface of the front bulkhead assembly, and seals them together with the lower surface of the front bulkhead assembly. This improves the ease of connection between the front bulkhead assembly and the front floor panel, and reduces interference from other components integrated on the front floor panel to the sealing area. Since the sealing area is located on the outside of the bulkhead, the battery device can be sealed from the outside of the bulkhead, which helps to improve the sealing performance of the battery device.

[0024] Please see Figure 1 , Figure 2 and Figure 3 This application proposes an embodiment of a CTC structure vehicle body 1000, which includes a lower body platform 100 and a battery device 200. The lower body platform 100 includes a front bulkhead assembly 10, a front floor panel 20, and a rear floor panel 30. The battery device 200 includes a lower tray 210 and a battery pack 220. The lower tray 210 includes a disc body 211 and a perimeter 212 surrounding the upper edge of the disc body 211. The disc body 211 and the perimeter 212 enclose a cavity for accommodating the battery pack 220. The front floor panel 20 is connected to the upper end of the perimeter 212 to close the cavity. The front floor panel 20 extends to the outside of the perimeter 212 from one edge near the front bulkhead assembly 10 and is sealed to at least one lower surface of the front bulkhead assembly 10.

[0025] The front bulkhead assembly 10 is positioned between the engine compartment and the passenger compartment, separating the two spaces to create relatively independent working and passenger areas. This reduces the entry of exhaust fumes, dust, mud, and other impurities from the engine compartment into the passenger compartment, improving its sealing and cleanliness. The front bulkhead assembly 10 also blocks noise and vibration from the engine compartment's power and transmission components from being transmitted to the passenger compartment, and prevents heat transfer from the engine compartment, thus improving overall NVH (Noise, Vibration, Harshness) performance and ride comfort. Furthermore, as a key load-bearing structural component, the front bulkhead assembly 10 can be used to mount and fix components such as the brake pedal, accelerator pedal, steering column, master brake cylinder, and air conditioning system. It also provides through-holes and mounting supports for wiring harnesses, brake lines, coolant lines, and air conditioning lines, allowing for the integrated arrangement of various system components. During a vehicle collision, the front bulkhead assembly 10 participates in the transmission and dispersion of forces at the front of the vehicle body, which can improve the structural rigidity and collision safety of the front of the vehicle body, reduce the risk of engine compartment components intruding into the passenger compartment during a collision, and enhance the survival space for occupants.

[0026] In some embodiments, the front bulkhead assembly 10 may include a lower front bulkhead panel 11 and a front bulkhead reinforcing panel 12, wherein the edge of the front floor panel 20 may extend to at least one lower surface of the front bulkhead reinforcing panel 12 and be sealed to the lower surface, and the sealed connection between the edge of the front floor panel 20 and the lower surface may be a first sealing portion 24. In this embodiment, the first sealing portion 24 refers to a continuous sealing strip formed along the length direction between the entire edge of the front floor panel 20 near one end of the front bulkhead assembly 10 and the corresponding lower surface of the front floor panel 20. The first sealing portion 24 seals the edge of the front floor panel 20 near one end of the front bulkhead assembly 10 with at least one edge of the front bulkhead assembly 10, thereby reducing the entry of foreign objects into the battery device 200 from the joint between the front bulkhead assembly 10 and the front floor panel 20.

[0027] The battery device 200 includes a lower tray 210 and a battery pack 220. The lower tray 210 can be used to house the battery pack 220 to protect it. The lower tray 210 can be entirely recessed to form a cavity for housing the battery pack 220. The lower tray 210 includes a disc body 211 and a perimeter 212 surrounding the upper periphery of the disc body 211. The disc body 211 and the perimeter 212 together form the cavity for housing the battery pack 220. The disc body 211 can be used to form the bottom support structure of the lower tray 210, and the perimeter 212 can be used to form a shield around the periphery of the disc body 211, so that the perimeter 212 and the disc body 211 together form the cavity for accommodating the battery pack 220. In this embodiment, the height of the perimeter 212 can be less than the thickness of the battery pack 220, and the front floor panel 20 can be partially recessed upward to cover the portion of the battery pack 220 that protrudes from the perimeter panel. In some embodiments, the height of the edging 212 may be greater than the thickness of the battery pack 220.

[0028] The front floor panel 20 can be directly or indirectly connected to the perimeter 212 so that the front floor panel 20, the perimeter 212, and the tray 211 enclose a closed cavity, thereby sealing the battery pack 220 within the cavity. The front floor panel 20 can replace the upper housing of the battery device 200 to seal the upper end of the lower tray 210.

[0029] The edge of the front floor panel 20 near the front bulkhead assembly 10 extends to the outer side of the edging 212. This means that when the lower tray 210 is vertically projected onto the front floor panel 20, the projection of the edging 212 is located inside the edge of the front floor panel 20 near the front bulkhead assembly 10. At this time, the edge of the front floor panel 20 near the front bulkhead assembly 10 can be sealed to at least one of the lower surfaces of the front floor panel 20 through the first sealing part 24, thereby reducing the flow of impurities into the cavity through the gap between the front bulkhead assembly 10 and the front floor panel 20, which helps to improve the sealing performance of the battery device 200. Since other functional components are usually integrated on the front floor panel 20, the front floor panel 20 has at least one large surface for supporting other functional components. In this embodiment, vertically projecting the lower tray 210 onto the front floor panel 20 means projecting the lower tray 210 onto the front floor panel 20 along a direction perpendicular to the large surface of the front floor panel 20. Other meanings of vertical projection in this embodiment are the same as here and will not be repeated.

[0030] In this embodiment, by extending the edge of the front floor panel 20 outward to the outside of the perimeter 212, and ensuring that the edge of the front floor panel 20 near the front bulkhead assembly 10 can be sealed to at least one of the lower surfaces of the front bulkhead assembly 10, the influence of other components integrated on the upper surface of the front floor panel 20 on the sealing area can be reduced, thus improving the reliability of the seal between the front floor panel 20 and the front bulkhead assembly 10. In this embodiment, the sealing connection between the front floor panel 20 and the front bulkhead assembly 10 forms a first sealing portion 24. The first sealing portion 24 can extend along the length of the edge of the front floor panel 20 near the front bulkhead assembly 10, and its shape can be straight or a combination of straight and curved lines. The first sealing portion 24 can completely cover the edge of the front floor panel 20 near the front bulkhead assembly 10, and can fill the gap between the edge of the front floor panel 20 near the front bulkhead assembly 10 and the corresponding lower surface of the front bulkhead assembly 10. In some embodiments, the front floor panel 20 and the corresponding lower surface of the front bulkhead assembly 10 can be sealed together using PVC (polyvinyl chloride) sealant.

[0031] In some embodiments, to improve the connection reliability between the front floor panel 20 and the front bulkhead assembly 10, the front floor panel 20 can also be fixedly connected to the front bulkhead assembly 10 via a first connecting part 21. In this embodiment, the first connecting part 21 can be a pin-connecting component, a snap-fit ​​component, a threaded connection component, or other structures capable of connecting and fixing the front floor panel 20 to the front bulkhead assembly 10.

[0032] In some embodiments, the first connection 21 is formed by welding the front floor panel 20 to the front bulkhead assembly 10. By welding the front floor panel 20 to the front bulkhead assembly 10, the structural strength of the CTC structure body 1000 can be improved. On the other hand, welding can form a second sealing structure between the front floor panel 20 and the front bulkhead assembly 10, thereby further reducing the possibility of impurities entering the battery device 200 through the gap between the front bulkhead assembly 10 and the front floor panel 20.

[0033] In some embodiments, in the vertical projection of the first connecting portion 21 and the surrounding edge 212 onto the front floor panel 20, the projection of the first connecting portion 21 is located inside the projection of the surrounding edge 212, combined with... Figure 2In the structure shown, in this embodiment, the first connection portion 21 between the front floor panel 20 and the front bulkhead assembly 10, from top to bottom, is located on the side of the perimeter 212 of the front bulkhead assembly 10 facing the cavity, which facilitates the installation or forming of the first connection portion 21. In some embodiments, the front floor panel 20 and the front bulkhead assembly 10 are welded together to form the first connection portion 21. The weld marks formed by the welding seal the contact area between the front floor panel 20 and the front bulkhead assembly 10, thereby forming a seal at the contact area between the surface of the front floor panel 20 and the contact area of ​​the front bulkhead assembly 10, reducing the flow of impurities towards the first sealing portion 24 through the gap between the upper surface of the front bulkhead panel and the edge of the front bulkhead assembly 10. In this embodiment, the first connection portion 21 may extend along the edge of the junction between the front bulkhead assembly 10 and the front floor panel 20 to form a sealing strip at the junction. In some embodiments, the front bulkhead assembly 10 may include a front bulkhead reinforcing plate 12, which may be bent. The edge of the front floor panel 20 near the front bulkhead assembly 10 may be sealed to the front bulkhead reinforcing plate 12 via a first sealing portion 24. Furthermore, the edge of the front floor panel 20 may be welded to the front floor panel 20 via a first connecting portion 21. In some embodiments, the front bulkhead reinforcing plate 12 may have a bent structure, and the front bulkhead reinforcing plate 12 may form a cavity with the front lower bulkhead plate 11. This cavity may form a buffer area beside the battery device 200 to buffer the compression of the battery device 200 by external forces, thereby improving the reliability of the battery device 200.

[0034] Please see Figure 1 , Figure 2 and Figure 3 This application proposes another embodiment of the CTC structure body 1000, which differs from the previous embodiment in that the edge of the front floor panel 20 near the rear floor panel 30 extends to the outside of the edging 212 and is sealed to at least one lower surface of the rear floor panel 30.

[0035] The rear floor panel 30, as a key load-bearing and covering component of the lower part of the vehicle body, can form the load-bearing foundation for the rear of the passenger compartment and the lower part of the luggage compartment, providing installation support and fixing interface for the rear seats, spare tire, storage structure, and chassis-related accessories. The rear floor panel 30 can enclose the lower space of the vehicle body, preventing road mud, sand, gravel, exhaust fumes, and noise from entering the passenger compartment, improving the overall vehicle sealing performance and NVH performance. Simultaneously, participating in the overall load-bearing frame of the vehicle body, the rear floor panel 30 can enhance the rigidity and torsional resistance of the lower structure of the vehicle body, transferring and dispersing loads during vehicle operation and collisions, improving the overall structural strength and passive safety of the vehicle. Furthermore, the rear floor panel 30 can work in conjunction with the surrounding longitudinal beams, transverse beams, and side structures to form a closed cavity, optimizing the airflow field under the vehicle body, improving the overall aerodynamic performance, and providing foot space for rear passengers, enhancing driving and riding comfort. In some embodiments, the rear floor panel 30 also includes a rear reinforcing plate 31, which can be used to increase the structural strength of the rear floor panel 30.

[0036] The edge of the front floor panel 20 near the rear floor panel 30 extends to the outer side of the rim 212. This means that when the lower tray 210 is vertically projected onto the front floor panel 20, the projection of the rim 212 is located inside the edge of the front floor panel 20 near the rear floor panel 30. At this time, the edge of the front floor panel 20 near the rear floor panel 30 can be sealed to at least one of the lower surfaces of the front floor panel 20 through the second sealing part 25, so as to reduce the flow of impurities into the cavity through the gap between the rear floor panel 30 and the front floor panel 20, thereby helping to improve the sealing performance of the battery device 200.

[0037] In this embodiment, by extending the edge of the front floor panel 20 outward to the outside of the perimeter 212, and ensuring that the edge of the front floor panel 20 near the rear floor panel 30 can be sealed to at least one of the lower surfaces of the rear floor panel 30, the influence of other components integrated on the upper surface of the front floor panel 20 on the sealing area can be reduced, thus improving the reliability of the seal between the front floor panel 20 and the rear floor panel 30. In this embodiment, the sealing connection between the front floor panel 20 and the rear floor panel 30 forms a second sealing portion 25. The second sealing portion 25 can extend along the length of the edge of the front floor panel 20 near the rear floor panel 30, and its shape can be straight or a combination of straight and curved lines. The second sealing portion 25 can completely cover the edge of the front floor panel 20 near the rear floor panel 30, and can fill the gap between the edge of the front floor panel 20 near the rear floor panel 30 and the corresponding lower surface of the rear floor panel 30. In some embodiments, the lower surfaces of the front floor panel 20 and the rear floor panel 30 can be sealed together using PVC sealant.

[0038] In some embodiments, to improve the connection reliability between the front floor panel 20 and the rear floor panel 30, the front floor panel 20 can also be fixedly connected to the rear floor panel 30 via a second connecting part 22. In this embodiment, the second connecting part 22 can be a pin-connecting component, a snap-fit ​​component, a threaded connection component, or other structures capable of connecting and fixing the front floor panel 20 and the rear floor panel 30.

[0039] In some embodiments, the second connection 22 is formed by welding the front floor panel 20 and the rear floor panel 30 together. By welding the front floor panel 20 and the rear floor panel 30 together, the structural strength of the CTC structure body 1000 can be improved. On the other hand, welding can form a second sealing structure between the front floor panel 20 and the rear floor panel 30, thereby further reducing the possibility of impurities entering the battery device 200 through the gap between the rear floor panel 30 and the front floor panel 20.

[0040] In some embodiments, in the vertical projection of the second connecting portion 22 and the surrounding edge 212 onto the front floor panel 20, the projection of the second connecting portion 22 is located inside the projection of the surrounding edge 212, combined with... Figure 3 In the structure shown, in this embodiment, the second connecting portion 22 of the front floor panel 20 and the rear floor panel 30, from top to bottom, is located on the side of the perimeter 212 of the rear floor panel 30 facing the cavity, which facilitates the installation or forming of the second connecting portion 22. In some embodiments, the front floor panel 20 and the rear floor panel 30 are welded together to form the second connecting portion 22. The weld marks formed by the welding seal the contact area between the front floor panel 20 and the rear floor panel 30, thereby forming a seal on the surface of the front floor panel 20 and the contact area of ​​the rear floor panel 30, reducing the flow of impurities towards the second sealing portion 25 through the gap between the upper surface of the front floor panel and the edge of the rear floor panel 30. In this embodiment, the second connecting portion 22 can extend along the edge of the junction of the rear floor panel 30 and the front floor panel 20 to form a sealing strip at the junction. In some embodiments, the rear floor panel 30 may include a rear reinforcing plate 31, which may be bent. The edge of the front floor panel 20 near the rear floor panel 30 may be sealed to the rear reinforcing plate 31 via a second sealing portion 25. Furthermore, the edge of the front floor panel 20 may be welded to the front floor panel 20 via a second connecting portion 22. In some embodiments, the rear reinforcing plate 31 may have a bent structure, and the rear reinforcing plate 31 and the rear floor panel 30 may enclose a cavity. This cavity may form a buffer area beside the battery device 200 to buffer the pressure exerted on the battery device 200 by external forces, thereby improving the reliability of the battery device 200.

[0041] Please see Figure 1 , Figure 2 and Figure 3 This application proposes another embodiment of a CTC structure body 1000, which includes a lower body platform 100 and a battery device 200; the lower body platform 100 includes a front bulkhead assembly 10, a front floor panel 20, and a rear floor panel 30; the battery device 200 includes a lower tray 210 and a battery pack 220, the lower tray 210 includes a tray body 211 and a perimeter 212 surrounding the upper edge of the tray body 211, the tray body 211 and the perimeter 212 forming an enclosure shape. A cavity for accommodating the battery pack 220 is formed, and the front floor panel 20 is connected to the upper end of the perimeter 212 to close the cavity; wherein: the front floor panel 20 extends to the outside of the perimeter 212 from one side edge near the front perimeter assembly 10 and is sealed to at least one lower surface of the front perimeter assembly 10, and the front floor panel 20 extends to the outside of the perimeter 212 from one side edge near the rear floor panel 30 and is sealed to at least one lower surface of the rear floor panel 30.

[0042] In this embodiment, one edge of the front floor panel 20 near the front bulkhead assembly 10 can be sealed to at least one lower surface of the front bulkhead assembly 10 via a first connecting portion 21, and one edge of the front floor panel 20 near the rear floor panel 30 can be sealed to at least one lower surface of the rear floor panel 30 via a second connecting portion 22, thereby sealing both ends of the battery device 200. Other features and technical effects in this embodiment are the same as in the aforementioned embodiments and will not be repeated.

[0043] Please see Figure 1 and Figure 4 In some embodiments, the lower body platform 100 further includes two sill beams 40, both of which are connected between the front bulkhead assembly 10 and the rear floor panel 30. The front bulkhead assembly 10, the rear floor panel 30, and the two sill beams 40 enclose a ring-shaped main load-bearing frame. The sill beams 40 at least partially protrude above the front floor panel 20. The edge of the front floor panel 20 near the sill beams 40 extends to the outside of the perimeter 212 and is sealed to the sill beams 40.

[0044] The sill beams 40 are located on both sides of the bottom of the vehicle body, below the door openings, and are key longitudinal load-bearing components in the lower part of the vehicle body. The sill beams 40 can enhance the rigidity of the side structure and the torsional rigidity of the entire vehicle, improving the overall structural stability of the vehicle body. In the event of a side collision, the sill beams 40 can withstand, transfer, and disperse lateral impact loads, reducing the deformation of the passenger compartment and preventing excessive intrusion to ensure occupant survival space, thus improving the vehicle's passive safety. The sill beams 40 can also work in conjunction with the front floor panel 20, longitudinal beams, and other components to form a closed cavity structure, enhancing the sealing performance of the bottom of the vehicle body, preventing road mud, dust, and noise from entering the passenger compartment, and improving the overall NVH performance and user comfort. The sill beams 40 can also provide an installation base and interface for the vehicle interior and door seals. In this embodiment, two sill beams 40 are spaced apart, and the front bulkhead assembly 10, the rear floor panel 30, and the two sill beams 40 together form a ring-shaped main load-bearing frame. The annular main load-bearing frame, as the core load-bearing skeleton of the vehicle's lower part, can significantly improve the vehicle's torsional stiffness, bending stiffness, and structural stability. In the event of frontal, side, and rear collisions, it can efficiently transfer and disperse impact loads, reduce passenger compartment deformation, maximize occupant survival space, and improve the vehicle's passive safety performance. The annular frame can also work in conjunction with the front floor panel 20 to form an integrated chassis load-bearing system, optimizing the structural stress path and improving overall structural strength.

[0045] The sill beam 40 at least partially protrudes above the front floor panel 20, so that the sill beam 40 can protect the front floor panel 20 above it. The edge of the front floor panel 20 near the sill beam 40 extends to the outside of the edging 212 and is sealed to the sill beam 40. In this embodiment, the sealed connection between the sill beam 40 and the front floor panel 20 near the edge of the sill beam 40 can be a third sealing portion 26. The third sealing portion 26 can extend along the edge of the front floor panel 20 and the extending direction of the sill beam 40, so that the third sealing portion 26 forms a sealing band. In this embodiment, by sealing the edge of the front floor panel 20 near the sill beam 40 with the sill beam 40, the possibility of impurities entering the battery device 200 through the gap between the sill beam 40 and the front floor panel 20 can be reduced. In some embodiments, the sill beam 40 may include an inner sill plate 41 and an outer sill plate 42, which together form the sill beam 40. In some embodiments, the inner door sill plate 41 and / or the outer door sill plate 42 may be connected to other functional components of the vehicle via fasteners 43.

[0046] The front floor panel 20 extends from the edge near the sill beam 40 to the outer side of the edging 212. This means that when the lower tray 210 is vertically projected onto the front floor panel 20, the projection of the edging 212 near the sill beam 40 is located inside the edge of the front floor panel 20. Since the sill beam 40 partially protrudes above the front floor panel 20, the sealing connection between the edge of the front floor panel 20 and the sill beam 40 is shielded below by the sill beam 40, further reducing the entry of impurities into the battery device 200. Because the edge of the front floor panel 20 is shielded in the area between the sill beam 40 and the edging 212, when the sill beam 40 is sealed to the front floor panel 20, the sealing connection is not affected by other components on the large surface of the front floor panel 20, helping to improve the reliability of the sealing connection. In this embodiment, the inner sill plate 41 can be partially protruding from the upper surface of the front floor panel 20, and the edge of the front floor panel 20 can be sealed to the inner sill plate 41. In some embodiments, the edge of the front floor panel 20 near the sill beam 40 can be sealed to the inner sill plate 41 using PVC sealant. In some embodiments, one end of the front floor panel 20 near the sill beam 40 may be fitted to the surface of the sill beam 40 and extend to the outside of the edging 212 to reduce the gap between the front floor panel 20 and the sill beam 40.

[0047] In some embodiments, the front floor panel 20 is also fixedly connected to the sill beam 40 via a third connecting portion 23. The third connecting portion 23 can be used to connect and fix the sill beam 40 and the front floor panel 20 to each other, thereby improving the connection strength between the front floor panel 20 and the sill beam 40. In this embodiment, the third connecting portion 23 can be a fixing component formed by pin connection, snap connection, threaded connection, or other connection methods. In some embodiments, the front floor panel 20 is fixedly connected to the sill beam 40 by welding, and the weld formed by welding provides a secondary seal for the contact area between the front floor panel 20 and the sill beam 40.

[0048] In some embodiments, in the vertical projection of the third connecting portion 23 and the perimeter 212 onto the front floor panel 20, the projection of the third connecting portion 23 is located outside the projection of the perimeter 212. In this embodiment, the third connecting portion 23 and the perimeter 212 are vertically projected onto the front floor panel 20, and in the projection plane, the projection of the third connecting portion 23 is located outside the projection of the perimeter 212, so that the fixed connection between the front floor panel 20 and the sill beam 40 is located outside the perimeter 212, thereby reducing the possibility of impurities entering the battery device 200 through the gap between the sill beam 40 and the front floor panel 20.

[0049] In some embodiments, a sealing layer 230 is provided between the perimeter 212 and the front floor panel 20. The sealing layer 230 may be sealing foam extending along the length direction of the perimeter 212, and the sealing layer 230 may be used to seal the contact area between the perimeter 212 and the front floor panel 20. In some embodiments, the width of the sealing layer 230 may be determined according to the width of the perimeter 212, and the number of sealing layers 230 may also be determined according to the width of the perimeter 212. In some embodiments, one end of the perimeter 212 near the front floor panel 20 may be bent outward to form a plane facing the front floor panel 20, and the sealing layer 230 may be disposed between this plane and the front floor panel 20. In some embodiments, the number of sealing layers 230 may be multiple, and the multiple sealing layers 230 may be arranged in an inner and outer manner.

[0050] This application also proposes an embodiment of a vehicle, which includes a CTC structure body 1000 as described in any of the above examples. The vehicle in this embodiment may also include other functional components, which can be referred to in the prior art. The CTC structure body 1000 integrates the upper housing of the battery device 200 with the front floor panel 20 of the vehicle body, eliminating the traditional independent battery cover and some connecting components, reducing the number of parts and assembly processes, and achieving a highly integrated design of the chassis and body. By enabling the front floor panel 20 to participate in the vehicle's force transmission, forming a ring-shaped main load-bearing frame together with the sill beam 40, longitudinal beams, and the front floor panel 20, the torsional stiffness, bending stiffness, and structural modes of the vehicle are significantly improved, thereby enhancing the vehicle's handling stability and NVH performance. Because the edge of the front floor panel 20 extends to at least part of the lower surface of the front surround assembly 10, the sill beam 40, and the rear floor panel 30 in this application, the sealing part between the front floor panel 20 and the above-mentioned structures can be located on the lower surface of the above-mentioned structures, which can reduce the problem of sealing failure caused by interference from other components on the large surface of the front floor panel 20; because the edge of the front floor panel 20 extends to the outside of the surround 212, the front floor panel 20 can cover the upper end of the surround 212, further improving the sealing performance between the surround 212 and the front floor panel 20.

[0051] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A CTC structure vehicle body, characterized in that, Including the underbody platform and battery unit; The underbody platform includes the front bulkhead assembly, the front floor panel, and the rear floor panel; The battery device includes a lower tray and a battery pack. The lower tray includes a tray body and a surrounding edge above the periphery of the tray body. The tray body and the surrounding edge form a cavity for accommodating the battery pack. The front floor panel cover is connected to the upper end of the surrounding edge to close the cavity. The front floor panel extends to the outside of the front bulkhead assembly from one side edge near the front bulkhead assembly and is sealed to at least one lower surface of the front bulkhead assembly; and / or, the front floor panel extends to the outside of the rear bulkhead assembly from one side edge near the rear floor panel and is sealed to at least one lower surface of the rear floor panel.

2. The CTC structure vehicle body as described in claim 1, characterized in that, The front floor panel extends from one edge near the front bulkhead assembly to the outer side of the bulkhead; the front floor panel is also fixedly connected to the front bulkhead assembly via a first connecting portion, wherein: In the vertical projection of the first connecting part and the surrounding edge on the front floor panel, the projection of the first connecting part is located inside the projection of the surrounding edge.

3. The CTC structure vehicle body as described in claim 2, characterized in that, The front floor panel is welded to the front bulkhead assembly to form the first connection.

4. The CTC structure vehicle body as described in claim 1, characterized in that, The front floor panel extends to the outer side of the perimeter edge near the rear floor panel; the front floor panel is also fixedly connected to the rear floor panel via a second connecting portion, wherein: In the vertical projection of the second connecting part and the surrounding edge on the front floor panel, the projection of the second connecting part is located inside the projection of the surrounding edge.

5. The CTC structure vehicle body as described in claim 4, characterized in that, The front floor panel and the rear floor panel are welded together to form the second connection.

6. The CTC structure vehicle body as described in any one of claims 1 to 5, characterized in that, The lower body platform also includes two sill beams, which connect the front bulkhead assembly and the rear floor panel. The front bulkhead assembly, the rear floor panel, and the two sill beams together form a ring-shaped main load-bearing frame; wherein: The sill beam at least partially protrudes above the front floor panel; the edge of the front floor panel near the sill beam extends to the outside of the edging and is sealed to the sill beam.

7. The CTC structure vehicle body as described in claim 6, characterized in that, The front floor panel is also fixedly connected to the sill beam via a third connecting part.

8. The CTC structure vehicle body as described in claim 7, characterized in that, In the vertical projection of the third connecting part and the surrounding edge on the front floor panel, the projection of the third connecting part is located outside the projection of the surrounding edge.

9. The CTC structure vehicle body as described in claim 6, characterized in that, A sealing layer is provided between the perimeter and the front floor panel.

10. A vehicle, characterized in that, Includes the CTC structure body as described in any one of claims 1 to 9.

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