Vehicle floor assembly and vehicle

Abstract

According to the vehicle floor assembly and the vehicle, on the premise that a production line does not need to be transformed, Z-direction size occupation can be reduced, meanwhile, Y-direction space is increased, the strength of the floor assembly is improved, use of reinforcing pieces is reduced, and a floor is made to be smoother. The vehicle floor assembly comprises a front floor serving as a battery upper cover plate; the threshold beams are arranged on the two sides of the front floor respectively; wherein the doorsill beam comprises an upper doorsill section used for connecting the front portion and the rear portion of a vehicle body and a lower doorsill section serving as a battery baffle, the upper doorsill section is connected with the lower doorsill section, and the front floor is assembled on the lower doorsill section.

Description

Technical Field

[0001] The present application relates to the field of vehicle floor, and specifically to a vehicle floor assembly and a vehicle. Background Art

[0002] The battery pack box is usually arranged under the vehicle floor, and the battery pack box cover is connected to the vehicle floor. This design occupies a large Z-direction dimension and the height of the passenger compartment is compressed.

[0003] In order to reduce the size occupied in the Z direction, there is a technical solution in the prior art to reuse the battery cover and the car floor. For example, in the car body disclosed in CN114940214A, not only the floor is used as the battery cover, but the door sills are also used as side baffles of the battery to participate in the structural construction of the car body.

[0004] Since the threshold in this solution serves as a battery baffle and participates in the composition of the battery box, and the battery pack box is not installed on the vehicle body until after the vehicle body is painted, this requires additional tooling when the vehicle body needs to pass the painting line. The tooling needs to connect the front and rear parts of the vehicle body through a structure that temporarily replaces the threshold beam in order to achieve overall painting of the vehicle body, which will result in a significant increase in painting costs. Summary of the invention

[0005] The present application provides a vehicle floor assembly and a vehicle, which can reduce the Z-direction dimensional occupancy without modifying the production line, further improve the utilization of the Y-direction space, and at the same time increase the strength of the vehicle body, thereby eliminating the floor reinforcement and making the floor further flat.

[0006] The technical solution of this application is:

[0007] In one aspect, the present application provides a vehicle floor assembly, comprising:

[0008] The front floor as the upper cover of the battery;

[0009] threshold beams arranged on both sides of the front floor respectively;

[0010] The sill beam includes an upper sill section for connecting the front and rear parts of the vehicle body and a lower sill section serving as a battery baffle, the upper sill section and the lower sill section are connected, and the front floor is assembled on the lower sill section.

[0011] Preferably, a seat mounting cross beam is connected to a surface of the front floor on one side facing the seat.

[0012] Preferably, a battery pack cross beam is connected to the surface of the front floor facing the battery cells.

[0013] Preferably, a battery coolant channel is provided on a surface of the front floor facing the battery cells.

[0014] Preferably, the front floor adopts a three-layer structure design, wherein the density of the middle layer is above 1.1 Kg / cm³, the bending strength is above 310 MPa, the specific strength is above 0.260, and the dimensional stability is below PPM 25.

[0015] Preferably, the other two layers of the front floor are aluminum alloy plates.

[0016] Preferably, the upper threshold section and the lower threshold section are screwed and fixed.

[0017] Preferably, the vehicle floor assembly further includes:

[0018] A side beam arranged at the front side of the floor and connected thereto;

[0019] A rear floor panel is arranged at the rear side of the floor panel and connected thereto.

[0020] Preferably, both sides of the front floor are respectively placed on one of the lower threshold sections, and are connected and fixed to the lower threshold section by FDS hot melt drilling technology;

[0021] The front floor is connected and fixed with the cabin side beam and the rear floor by FDS hot melt drilling process.

[0022] On the other hand, the present application also provides a vehicle, comprising the above-mentioned vehicle floor assembly.

[0023] The beneficial effects of this application are:

[0024] After the front floor and the battery cover are reused, the original front floor structure is cancelled, which can reduce the occupied Z-direction height.

[0025] Since the threshold beam is split into an upper threshold section and a lower threshold section, the lower threshold section is used as a battery baffle, and the original battery baffle can be removed, thereby increasing the Y-direction space for battery arrangement, thereby increasing the vehicle's power, which is beneficial to increasing the vehicle's endurance; and, the upper threshold section is used as a connecting section between the front and rear of the vehicle body, so that the vehicle body can be painted as a whole, without the need to add additional tooling to connect the front and rear of the vehicle body, and without major modifications to the production line, thereby avoiding cost increases. At the same time, the floor, battery, lower panel, and lower threshold are integrated into a structure, and the entire assembly participates in the collision, thereby strengthening the strength of the floor, thereby eliminating some reinforcing beams on the floor, and achieving the purpose of a flat floor and weight reduction of the floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the assembly of the front floor assembly in some embodiments of the present application;

[0027] Figure 2 A cross-sectional view of a front floor in some embodiments of the present application;

[0028] Figure 3 This is a schematic diagram of the structure of the front floor in some embodiments of the present application;

[0029] Figure 4 A cross-sectional view of a front floor assembly in some embodiments of the present application;

[0030] Figure 5 This is a schematic diagram of the structure of a threshold beam in some embodiments of the present application;

[0031] Description of reference numerals: 1-front floor; 11-seat mounting crossbeam; 12-battery pack crossbeam; 101-upper layer; 102-middle layer; 103-lower layer;

[0032] 2-sill beam; 21-upper sill section; 22-lower sill section; 211-upper sill body; 212-first mounting boss; 221-lower sill body; 222-second mounting boss;

[0033] 3- rear floor;

[0034] 4-cabin side beam;

[0035] 5-Battery lower panel. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0037] Reference Figure 1 In an embodiment of the present application, a vehicle floor assembly is provided, including: a front floor 1 as a battery upper cover plate; door sill beams 2 are arranged on both sides of the front floor 1; wherein the door sill beam 2 includes an upper door sill section 21 for connecting the front and rear parts of the vehicle body and a lower door sill section 22 as a battery baffle, the upper door sill section 21 and the lower door sill section 22 are connected, and the front floor 1 is assembled on the lower door sill section 22.

[0038] After the front floor 1 and the battery cover are reused, the original front floor 1 structure is cancelled, which can reduce the Z-height occupation. The space vacated by the original front floor 1 can be used as the passenger compartment space, so the Z-height of the passenger compartment can be increased; the space vacated by the original front floor 1 can also be used as a battery cell layout space, thereby increasing the battery cell power and improving the vehicle's endurance.

[0039] Since the sill beam 2 is split into an upper sill section 21 and a lower sill section 22, the lower sill section 22 is used as a battery baffle, and the original battery baffle can be removed, thereby increasing the Y-direction space for battery arrangement, thereby increasing the battery capacity of the vehicle, which is beneficial to increasing the vehicle's endurance; and, the upper sill section 21 serves as a connecting section between the front and rear of the vehicle body, so that the vehicle body can be painted as a whole, without the need for additional tooling to connect the front and rear of the vehicle body, and without major modifications to the production line, thereby avoiding cost increases.

[0040] By forming the front floor 1 with the cover of the battery pack, that is, there is no need to set up the front floor 1 additionally, on the one hand, the number of parts is reduced, the production cost and the weight of the whole vehicle are reduced, and on the other hand, the height of the battery pack from the ground is greater, the layout space of the battery pack is larger, and the probability of damage to the battery pack can be reduced. In addition, compared with the body with a floor in the related art, the body of the embodiment of the utility model does not need to reserve an assembly gap between the floor and the battery pack, which effectively improves the space utilization rate of the whole vehicle.

[0041] The traditional sheet metal threshold is not easy to be disassembled into two parts. The traditional sheet metal threshold is generally a sheet metal inner and outer threshold, the interior of the threshold is a sheet metal or profile reinforcement structure, or it is an integral extruded threshold. There are also few fully extruded thresholds at present.

[0042] In the embodiment of the present application, the threshold beam is made of aluminum alloy extrusion; based on the extruded threshold, the threshold is divided into an upper threshold section 21 and a lower threshold section 22. After adopting this solution, riveting and gluing are required to ensure the sealing, which puts higher requirements on the sealing and connection methods, and the collision risk needs to be considered.

[0043] Reference Figure 3 In some embodiments of the present application, a seat mounting crossbeam 11 is connected to a surface of the front floor 1 on one side facing the seat to improve the strength of the front floor 1. A seat mounting point is provided on the seat mounting crossbeam 11 to achieve seat installation.

[0044] Reference Figure 3 In some embodiments of the present application, a battery pack cross beam 12 is connected to the surface of the front floor 1 facing the battery cell to improve the strength of the front floor 1. After the battery pack cross beam 12, the seat mounting cross beam 11 and the front floor 1 are integrated together, the battery box is also used as a part of the vehicle body, which also has a supplementary effect on the enhancement of the strength of the front floor 1, that is, it can improve the stiffness of the front floor 1, thereby ensuring that the performance of the vehicle body meets the standards. After simulation analysis, the front floor 1 can achieve a bending stiffness of 13000N / mm and a torsional stiffness of 1200KN.m / rad.

[0045] In some embodiments of the present application, a battery coolant channel is provided on the surface of the front floor 1 facing the battery cell. The front floor 1 serves as a flow channel plate of a water cooling plate, which simplifies the structure of the battery box, reduces the weight, and increases the Z-direction space of the passenger compartment.

[0046] Reference Figure 2 In some embodiments of the present application, the front floor 1 adopts a three-layer structure design, and the three-layer structure is connected and compounded into a whole. Among them, the density of the middle layer 102 is above 1.1Kg / cm³, the bending strength is above 310Mpa, the specific strength is above 0.260, and the dimensional stability is below PPM25. The middle layer 102 is made of a special hard foam material, for example: it is made by laminating and thermally curing after the reinforcing material is impregnated with a mixed liquid, wherein the mixed liquid is proportioned by weight as follows: 125 parts of epoxy resin, 35.0-80.0 parts of solvent, 2.5-35 parts of curing agent, 0.01-0.50 parts of accelerator, 0.5-5 parts of coupling agent, 0.05-0.1 parts of surfactant, 5-50 parts of hollow glass microspheres; the reinforcing material is electronic grade glass fiber cloth.

[0047] Relying on the special properties of the middle layer 102, the design of related reinforcing beams on the front floor 1 can be reduced, and these reinforcing beam designs can further reduce the space occupied by the front floor 1 in the Z direction; Figure 3 It can be seen that, except for the battery pack cross beam 12 and the seat installation cross beam 11, no other reinforcing beams are arranged on the front floor 1, and the two original reinforcing longitudinal beams on the front floor 1 and the one original seat reinforcing cross beam are cancelled.

[0048] In some embodiments of the present application, the other two layers of the front floor 1 (i.e. Figure 2 The upper layer 101 and the lower layer 103 in the front floor 1 can be made of aluminum alloy, which reduces the weight of the front floor 1 itself and meets the lightweight requirement of the front floor 1 of the vehicle body.

[0049] After the inner and outer layers of the front floor 1 are made of aluminum alloy and the middle layer 102 is made of the aforementioned hard foam material, the strength of the front floor 1 structure itself is improved and the weight of the front floor 1 is reduced, that is, the front floor 1 achieves the dual effects of weight reduction and performance.

[0050] Reference Figure 5In some embodiments of the present application, the upper threshold section 21 includes: an upper threshold section body 211 and a first mounting boss 212 protrudingly arranged on a side wall thereof facing the lower threshold section 22 and extending along its length direction; the lower threshold section 22 includes: a lower threshold section body 221 and a second mounting boss 222 protrudingly arranged on an outer side wall thereof and extending along its length direction; when the upper threshold section 21 and the lower threshold section 22 are assembled, the upper threshold section body 211 is mounted on the lower threshold section body 221, the first mounting boss 212 is mounted on the first mounting boss 222, and the first mounting boss 212 and the second mounting boss 222 are fixed by screwing.

[0051] from Figure 5 It can also be seen that the inner side wall of the lower sill section body 221 is a flat installation surface, and the side walls of the front floor 1 and the inner side wall of the lower sill section body 221 are fixed together by FDS hot melt drilling technology and with sealant.

[0052] Reference Figure 1 In some embodiments of the present application, the vehicle floor assembly further includes: a cabin side beam 3 arranged at the front side of the front floor 1 and connected thereto; and a rear floor 4 arranged at the rear side of the front floor 1 and connected thereto. The connection between the cabin side beam, the rear floor 4 and the front floor 1 can be realized in an existing manner, for example, the front floor 1 is connected to the cabin side beam and the rear floor 4 by using an FDS hot melt drilling process and a sealant, thereby ensuring good air tightness while ensuring connection strength.

[0053] Reference Figure 4 In some embodiments of the present application, the battery lower panel 5 is arranged below the lower sill section 22 and is fixedly connected to the lower sill section 22 by riveting or welding. The upper sill section 21 connects the front and rear of the vehicle body together, thereby achieving the overall painting of the vehicle body; and the front floor 1, the lower sill section 22, the battery cell, and the battery lower panel 5 are connected to form a battery box, which is then assembled as a whole between the upper sill section 21, the cabin side beam 3 and the rear floor 4 of the vehicle.

[0054] Since the threshold beam 2 and the battery box are separated into upper and lower parts, the battery box and the threshold beam 2 are integrated, ensuring that the threshold beam 2 and the battery baffle are two-in-one without modifying the existing production line, increasing the battery layout space and reducing the weight at the same time. Since the battery box participates in the construction of the threshold beam 2, the side impact strength of the front floor 1 is further increased, contributing to the elimination of the floor reinforcement, and promoting the flatness of the front floor 1.

[0055] An embodiment of the present application also provides a vehicle, comprising the above-mentioned vehicle floor assembly.

[0056] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0058] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, relational terms such as "first" and "second" are used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements does not include those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0059] The technical solution provided by the utility model is described in detail above. The principle and implementation method of the utility model are described in this article using specific examples. The description of the above embodiments is only used to help understand the utility model, and the content of this specification should not be understood as limiting the utility model. At the same time, for those skilled in the art, according to the utility model, there will be different forms of changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived from them are still within the protection scope of the utility model.

Claims

1. A vehicle floor assembly, characterized in that: include: A front floor panel (1) serving as a battery upper cover; Sill beams (2) are arranged on both sides of the front floor (1); The sill beam (2) comprises an upper sill section (21) for connecting the front and rear parts of a vehicle body and a lower sill section (22) serving as a battery baffle, the upper sill section (21) and the lower sill section (22) being connected, and the front floor (1) being mounted on the lower sill section (22).

2. The vehicle floor assembly according to claim 1, characterized in that: A seat mounting crossbeam (11) is connected to a surface of the front floor (1) on one side facing the seat.

3. The vehicle floor assembly according to claim 1 or 2, characterized in that: A battery pack crossbeam (12) is connected to a surface of the front floor (1) on one side facing the battery cells.

4. The vehicle floor assembly according to claim 1, characterized in that: A battery coolant channel is provided on a surface of the front floor (1) on one side facing the battery cell.

5. The vehicle floor assembly according to claim 1, characterized in that: The front floor (1) adopts a three-layer structural design, wherein the density of the middle layer (102) is above 1.1 kg / cm³, the bending strength is above 310 MPa, the specific strength is above 0.260, and the dimensional stability is below PPM25.

6. The vehicle floor assembly according to claim 5, characterized in that: The other two layers of the front floor (1) are aluminum alloy plates.

7. The vehicle floor assembly according to claim 1, characterized in that: The upper threshold section (21) and the lower threshold section (22) are screwed and fixed.

8. The vehicle floor assembly according to claim 1, characterized in that: The vehicle floor assembly further comprises: a cabin side beam (3) arranged on the front side of the front floor (1) and connected thereto; A rear floor (4) is arranged on the rear side of the front floor (1) and connected thereto.

9. The vehicle floor assembly according to claim 8, characterized in that: Both sides of the front floor (1) are respectively placed on one of the lower threshold sections (22), and are connected and fixed to the lower threshold section (22) by means of an FDS hot melt drilling process; The front floor (1) is connected and fixed to the cabin side beam (3) and the rear floor (4) by means of an FDS hot melt drilling process.

10. A vehicle, characterized in that: The vehicle floor assembly comprises the vehicle floor assembly according to any one of claims 1 to 9.

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