Motor vehicle comprising a floor structure assembly and a reservoir individual structure assembly

Abstract

The invention relates to a motor vehicle comprising a floor structure assembly and a reservoir unit structure assembly. The floor structure assembly is an integral component of the motor vehicle body. The reservoir units of the reservoir unit structure assembly are arranged in the floor structure assembly. The reservoir units are arranged in the cell cavities of a honeycomb structure extending in the vertical direction of the vehicle, the honeycomb structure being made of aluminum by means of extrusion, a plurality of reservoir units being arranged side by side in each of the cell cavities. The motor vehicle comprises a lower floor and an upper floor, which are connected via at least one spacer and at least one screw connection, the spacer being an element corresponding to the distance between the lower and upper floor, the upper floor being materially bonded to the side sill and the body cross member and forming an integral component of the body-in-white, the lower floor being detachably connected to the side sill and the body cross member.

Description

Technical Field

[0001] The invention relates to a motor vehicle comprising a floor structure assembly and a reservoir monolithic structure assembly. Background Art

[0002] Electrically driven vehicles, such as those with a purely electric drive or so-called hybrid vehicles that have both an electric drive and an internal combustion engine, are known. These vehicles typically have an electric motor in their drivetrain for driving the vehicle and a traction battery, also known as a drive battery, that supplies electrical energy to the electric motor. Such traction batteries are often also referred to as high-voltage accumulators. It is known that battery cells in traction batteries can be combined into battery modules. The battery cells or modules are housed in a fluid-tight housing of the traction battery, which protects the cells and contains other devices, such as those for controlling and air-conditioning the cells. Such a traction battery, including the housing, can be mounted, for example, as a mounting part on the underside of the vehicle body in the floor area of ​​the vehicle, between the front and rear axles.

[0003] For example, DE 10 2013 204 765 A1 discloses a cell accumulator unit, or traction battery, for storing electrical energy to drive an electric motor of a motor vehicle. The traction battery housing is mounted on the underside of the vehicle and includes an energy-absorbing region formed on the outer edge of the housing. This region helps dissipate the impact energy in a crash without damaging the cell accumulator housed in the housing. The housing is positioned between and connected to the side sills of the vehicle.

[0004] Furthermore, the goal is to design the traction battery so wide that it is exactly as wide as the vehicle body. In this case, the traction battery or the traction battery housing completely overlaps the vehicle floor, including the side sills. This has the advantage that the installation space below the vehicle floor can be optimally utilized for accommodating the battery cells, thereby providing the vehicle with the maximum possible power or range. Summary of the Invention

[0005] The object of the present invention is to provide a motor vehicle comprising a floor structural assembly and a reservoir monolithic structural assembly, wherein the floor structural assembly is an integral component of the motor vehicle body, the motor vehicle body has sufficient energy absorption capacity in the event of a collision, and the reservoir monolithic structural assembly can accommodate a sufficient number of reservoir monoliths and at the same time improves maintenance and repair friendliness.

[0006] This object is achieved by a motor vehicle comprising a floor assembly and a reservoir monoblock assembly, which has the combination of features described below.

[0007] According to the present invention, a motor vehicle comprises a floor structure assembly and a reservoir monolithic structure assembly. The floor structure assembly is an integral component of the motor vehicle body. In other words, the floor structure assembly is a component of the so-called body-in-white. The reservoir monolithic structure assembly comprises reservoir monolithic structures arranged in the floor structure assembly. The reservoir monolithic structures are arranged in honeycomb cavities of a honeycomb structure extending in the vertical direction of the vehicle, forming a multi-cavity hollow column structure, wherein the honeycomb structure is made of aluminum by extrusion, and a plurality of reservoir monolithic structures are arranged vertically side by side in each of the honeycomb cavities. The motor vehicle comprises a lower floor and an upper floor, and the lower floor and the upper floor are connected to each other via at least one spacer and at least one screw connection device. The spacers are elements corresponding to the distance between the lower and upper floor panels. The upper floor panel is materially connected to the side sills and the body cross member and thus forms a component of the bodywork, while the lower floor panel is detachably connected to the side sills and the body cross member. The honeycomb structure is materially connected at its lower end to the upper side of the lower floor panel, thereby forming a very stable sandwich-like structure with the lower floor panel. The honeycomb structure is advantageously arranged in the cavity of the floor panel structure component.

[0008] The structural method of integration with the vehicle body enables the storage unit cell structure assembly to be arranged in a space-saving manner. According to the present invention, the storage unit cell structure assembly is not a storage unit cell structure assembly with its own or independent, if necessary fluid-tight housing, which is assembled to the vehicle body together with the housing as an assembly part or a separate unit. Instead, the space within the floor structure assembly of the vehicle body is used to accommodate the storage unit cell or the storage unit cell structure assembly in a space-saving manner. In other words, the floor structure assembly of the vehicle body serves as or at least partially serves as a housing for the storage unit cell structure assembly. In this case, the honeycomb structure can assist in the rigidity or strength of the floor structure assembly, so that the honeycomb structure can fully transmit and / or absorb the collision energy in the event of a motor vehicle collision, especially a side collision of the motor vehicle. In this case, the honeycomb structure can also replace other necessary crossbeams or longitudinal beams of the body-in-white in other aspects. The space in the floor structure assembly can therefore be optimized for accommodating the storage unit cell, while generating collision strength.

[0009] Preferably, in addition to the reservoir cells, the reservoir cell assembly also comprises a cooling device, power and control lines, and a control device.

[0010] The honeycomb structure corresponds to a so-called tiling or regular tiling in cross section, i.e., in the longitudinal and transverse directions of the vehicle (section in the xy direction in the vehicle coordinate system). The body of a motor vehicle is a so-called self-supporting body, of which the floor structure components are an integral part.

[0011] The motor vehicle is in particular a motor vehicle with an electric drive. In this case, the storage cell assembly is a drive battery. The storage cell assembly can also be referred to as a high-voltage accumulator or a traction battery.

[0012] Advantageously, the honeycomb cavity can have a polygonal (polygonal), in particular a regular polygonal outline or cross section. Quadrilateral, in particular rectangular or square, and / or hexagonal, in particular regular hexagonal, and / or triangular, in particular regular triangular cross sections are advantageous. The honeycomb cavity can particularly advantageously have the shape of a honeycomb.

[0013] In principle, the honeycomb structure can also comprise honeycomb cavities with different cross sections. Honeycomb cavities with different cross sections can then be combined with one another in a mosaic pattern.

[0014] Accordingly, the shape of the honeycomb cavity can be matched to the outer shape of the reservoir cell.

[0015] The reservoir cell can advantageously have a cylindrical or cuboid shape.

[0016] According to a preferred further development, a single accumulator cell or a plurality of accumulator cells, for example two, three, four, five, six, seven, eight or nine accumulator cells, can be accommodated in a honeycomb chamber.

[0017] The honeycomb structure can be produced, for example, by extrusion. For example, the honeycomb structure can be made of aluminum or an aluminum alloy.

[0018] Alternatively, the honeycomb structure can also be produced from plastic or fiber-reinforced plastic.

[0019] According to a preferred further development, the floor structure assembly comprises a lower floor and an upper floor. The lower floor and the upper floor can be designed to be essentially plate-shaped. The lower floor faces the foundation below the motor vehicle and can also be provided with a lower floor trim. The upper floor forms the floor of the vehicle interior or passenger compartment, located above the floor structure assembly. The lower floor and / or the upper floor can be an integral component of the floor structure assembly. The lower floor and / or the upper floor can be connected to the floor structure assembly. The accumulator unit assembly is preferably arranged between the lower floor and the upper floor.

[0020] The lower end side of the honeycomb structure can be connected to the bottom plate below, especially materially connected, for example, by bonding or welding. Alternatively, the upper end side of the honeycomb structure can be connected to the bottom plate above, especially materially connected, for example, by bonding or welding.

[0021] By connecting the corresponding floor panels to the honeycomb structure, the floor structure assembly is further stiffened or reinforced and forms part of the load path in the event of a side impact.

[0022] The bottom plate below is detachably fixed to the vehicle body or the floor structure assembly. Alternatively, the bottom plate above can be detachably fixed to the vehicle body or the floor structure assembly.

[0023] This allows simple access to the reservoir assembly for assembly, maintenance and repair purposes by fitting or removing the removable base plate.

[0024] Preferably, the other of the lower and upper floor panels is detachably fastened to the floor structure assembly, while the other floor panel is fixed to the vehicle body, that is, non-detachably fastened to the vehicle body, for example, by a materially bonded connection. In other words, the floor panel of the lower and upper floor panels that is fixed to the vehicle body forms part of the body-in-white.

[0025] The rigidity and collision resistance of the floor structure components are further improved by fixing the floor to the vehicle body.

[0026] Nevertheless, openings that can be closed with covers can be provided in the floor panel that is fixed to the vehicle body for assembly, maintenance and repair purposes.

[0027] The lower and upper base plates can be fixed to one another or connected and braced to one another in a force-locking and / or form-locking manner. For this purpose, a spacing element can be provided between the lower and upper base plates. In the region of the spacing element, the lower and upper base plates can be braced to one another via a screw connection.

[0028] This serves to further strengthen the floor structure assembly and is also advantageous when positioning the floor structure assembly over ground obstacles.

[0029] According to a further preferred embodiment, the honeycomb structure is arranged between at least two body longitudinal beams and, if necessary, between at least two body cross beams. The body longitudinal beams can be side sill beams, i.e., the outer, lower body longitudinal beams. However, the body longitudinal beams can also be spaced apart from the outer edges of the body. The body longitudinal beams can also be centrally arranged. The body longitudinal beams and body cross beams are integral components of the body-in-white and are accordingly non-detachably connected to adjacent body components. The body longitudinal beams and body cross beams are components of the floor structure assembly. In particular, the aforementioned floor panel fixed to the body can be connected to the body longitudinal beams and body cross beams. The removable floor panel can be removably mounted to the body longitudinal beams and body cross beams by screwing or in other ways and methods.

[0030] Preferably, the floor assembly forms a fluid-tight surrounding housing of the reservoir monolithic assembly. To this end, the upper floor, the lower floor, the vehicle body cross members and the vehicle body longitudinal members can be connected to one another in a fluid-tight manner.

[0031] The floor assembly, together with the lower and upper floor panels, thus replaces a separate housing and the inherent load-bearing structure of conventional reservoir cell assemblies, which are designed as an assembly. This allows the motor vehicle to be designed to be more compact overall or, if necessary, accommodate more reservoir cells. Furthermore, the housing of the reservoir cell assembly does not need to be separately and costly to manufacture and assemble. Instead, the floor assembly serving as the housing for the reservoir cell assembly can be easily manufactured in a conventional body-in-white, with the exception of the removable floor panel that is assembled in the assembly line.

[0032] The aforementioned supplementary features of the invention are possible in this respect and can be combined with one another in any meaningful way. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Following is a brief description of the accompanying drawings.

[0034] Figure 1 The present invention is a schematic sectional view of a floor assembly of a motor vehicle body with a reservoir monolithic assembly according to a first exemplary embodiment of the present invention.

[0035] Figure 2 The present invention is a schematic top view of a floor assembly of a motor vehicle body with a reservoir monolithic assembly according to one exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0037] As in Figure 1 As shown in the sectional view of FIG, the body of a motor vehicle with an electric drive has a floor structure assembly 1. In the floor structure assembly 1, between the lower floor 5 and the upper floor 7 and the left side sill 9 and the right side sill 11 and between Figure 2 A drive battery (not shown) is positioned or integrated between the cross members 13 and 15 shown in the figure. This drive battery is formed by the accumulator cell assembly according to the present invention. A honeycomb structure 3 formed as a multi-cavity hollow column structure according to the present invention is also located in the floor assembly 1, that is, in the cavity formed by the floor assembly 1. The upper floor panel 7 is materially connected to the side sills 9, 11 and the cross members 13 and 15 and thus forms an integral part of the body-in-white. The lower floor panel 5 is an assembly component and is detachably connected to the side sills 9, 11 and the cross members 13, 15, for example, by screws. The honeycomb structure 3 is formed in the vertical direction of the vehicle, that is, the individual honeycomb cavities 31, 32, 33 extend in the vertical direction of the vehicle.

[0038] Figure 2 The schematic top view of FIG shows the floor structure assembly 1 from above, with the upper floor panel 7 omitted. The side sills 9 and 11 and the cross members 13 and 15 extending between the side sills 9 and 11 are shown. The honeycomb structure 3 with a plurality of honeycomb cavities 31, 32, 33 can be seen between the side sills 9 and 11 and the cross members 13 and 15.

[0039] The honeycomb structure 3 is connected with its lower end side in a material-locking manner to the upper side of the lower base plate 5. Therefore, the honeycomb structure 3 and the lower base plate 5 form a very stable structure similar to a sandwich structure.

[0040] For example, seven cylindrical battery cells, i.e., storage cells, are arranged side by side in vertical arrangement in each honeycomb cavity 31, 32, 33. More or fewer battery cells may also be accommodated therein. The battery cells are not shown in the figure.

[0041] The honeycomb structure 3 is made of aluminum by extrusion. The lower floor panel 5 is also advantageously made of aluminum. The side sills 9 and 11 and the upper floor panel 7 as well as the entire body are made of steel, but can also be made of aluminum if the body is made of aluminum.

[0042] As in Figure 1 As shown in the example at one location, the lower base plate 5 and the upper base plate 7 can be directly connected to one another via one or more spacers 17 and associated screw connections 19. The spacers 17 are elements corresponding to the distance between the lower base plate 5 and the upper base plate 7. The screw connections 19 clamp the lower base plate 5 and the upper base plate 7 against one another in the area of ​​the spacers 17. The spacers 17 are, for example, sleeves with through-holes in the vertical direction, through which the screws of the screw connections 19 pass. The clamping of the lower base plate 5 and the upper base plate 7 imparts even greater stability to the floor assembly 1 and is advantageous in the event of impacts from below, such as when driving over objects and uneven terrain.

[0043] The floor assembly 1, with its lower floor panel 5, upper floor panel 7, side sills 9 and 11, and cross members 13 and 15, forms a fluid-tight enclosure surrounding the drive battery, including the battery cells and other components of the drive battery, such as cooling, current and control lines, and the control unit. This protects the drive battery from environmental influences and also prevents the release of battery contents into the surrounding environment and the passenger compartment.

[0044] Between the honeycomb structure 3 and the upper base plate 7 there is an intermediate space in which, for example, cooling devices, current and control lines as well as a control device are accommodated.

[0045] By dismounting the lower floor 5, the drive battery can be removed from the floor structure assembly.

[0046] In the case of a side impact of the motor vehicle, the load path extends via the relevant side sill 9, 11 through the upper floor 7 and the lower floor 5 and the honeycomb structure 3. The honeycomb structure 3 here increases the stiffness of the floor structure assembly 1 in the region of the drive battery and here can replace an additional carrier structure in the interior of the drive battery, while at the same time increasing the space available for the battery cells. With the same crash strength, the motor vehicle can accommodate more battery cells and thus achieve a greater accumulator capacity. Also, any structural space present in the motor vehicle floor structure assembly can be used in this way and method for accommodating battery cells. Overall, the electric range of the motor vehicle can be increased while maintaining the same quality of crash strength.

Claims

1. A motor vehicle comprising a floor structure assembly (1) and a reservoir monolithic structure assembly, wherein: The floor structure assembly (1) is an integral component of a motor vehicle body. The reservoir monomer of the reservoir monomer structure assembly is arranged within the floor structure assembly (1). The reservoir monomer is arranged in a honeycomb cavity (31, 32, 33) of a honeycomb structure (3) extending in the vertical direction of the vehicle to form a multi-cavity hollow column structure. The honeycomb structure (3) is made of aluminum by extrusion. A plurality of reservoir monomers are arranged vertically side by side in each of the honeycomb cavities (31, 32, 33). The motor vehicle comprises a lower floor (5) and an upper floor (7). The lower floor (5) and the upper floor (7) are connected via at least one spacer (17) and at least one spacer (17). The lower floor panel (5) and the upper floor panel (7) are connected to each other by a screw connection device (19), the spacer (17) is an element corresponding to the distance between the lower floor panel (5) and the upper floor panel (7), and the upper floor panel (7) is connected to the side sill beams (9, 11) and the body cross beams (13, 15) in a material-locked manner and thus forms a component of the bodywork, while the lower floor panel (5) is detachably connected to the side sill beams (9, 11) and the body cross beams (13, 15), and the honeycomb structure (3) is connected to the upper side of the lower floor panel (5) in a material-locked manner with its lower end side, and thus the honeycomb structure (3) and the lower floor panel (5) form a very stable structure similar to a sandwich structure.

2. The motor vehicle according to claim 1, wherein: The honeycomb cavities (31, 32, 33) have polygonal cross sections.

3. The motor vehicle according to claim 2, wherein: The honeycomb cavities (31, 32, 33) have regular polygonal cross sections.

4. The motor vehicle according to claim 2, wherein: The honeycomb cavities (31, 32, 33) have triangular and / or quadrilateral and / or hexagonal cross sections.

5. The motor vehicle according to any one of claims 1 to 4, wherein: One accumulator cell, two accumulator cells, three accumulator cells, four accumulator cells, five accumulator cells, six accumulator cells, seven accumulator cells, eight accumulator cells, or nine accumulator cells are accommodated in the honeycomb chamber (31, 32, 33).

6. The motor vehicle according to any one of claims 1 to 4, wherein: Each of the lower base plate (5) and the upper base plate (7) is either an integral component of the base plate structural component (1) or is at least connected to the base plate structural component (1), and a reservoir single body structural component is arranged between the lower base plate (5) and the upper base plate (7).

7. The motor vehicle according to any one of claims 1 to 4, wherein: The lower end side of the honeycomb structure (3) is connected to the bottom plate (5) below by bonding or welding.

8. The motor vehicle according to any one of claims 1 to 4, wherein: The spacer (17) is a sleeve.

9. The motor vehicle according to any one of claims 1 to 4, wherein: The honeycomb structure (3) is arranged at least between two vehicle body longitudinal beams.

10. The motor vehicle according to claim 9, wherein: The vehicle body longitudinal beams are side sill beams (9, 11).

11. The motor vehicle according to claim 9, wherein: The honeycomb structure (3) is arranged at least between two vehicle body longitudinal beams and additionally between at least two vehicle body cross beams (13, 15), wherein the vehicle body longitudinal beams and the vehicle body cross beams (13, 15) are components of a floor structure assembly (1).

12. The motor vehicle according to claim 6, wherein: The base plate assembly (1) forms a fluid-tight surrounding housing of the reservoir monolithic assembly.

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