Energy store-bottom assembly for an electrically drivable passenger car

Abstract

The invention relates to an energy storage base assembly for an electrically drivable passenger car, comprising a base assembly (1) on the underside of which an energy storage (17, 28) of an electric drive of the passenger car is fastened. On the base assembly, corresponding lateral receptacles (43) are provided, in the area of which corresponding individual fastening points (51) are provided, on which the energy storage can be fastened, and which are fastened directly below the rear longitudinal beam (11) of the side sills (3), in a first construction type of the energy storage base assembly for a passenger car with a purely electric drive, the energy storage has, adjacent to its corresponding fastening points on the corresponding receptacles, corresponding fastening points (47) to which a crossbar (23) extending in the vehicle transverse direction is fastened. The invention also relates to a modular system for producing such an energy storage base assembly.

Description

Technical Field

[0001] This invention relates to an energy storage-bottom assembly for an electrically driven passenger car. The invention also relates to a modular system for such an energy storage-bottom assembly. Background Technology

[0002] Many future passenger cars are designed to offer users multiple different drive options within a single vehicle structure series. Therefore, in addition to vehicles with pure internal combustion engine (ICE) drive systems, vehicles with electric drive systems (xEV) should also be supplied, in particular. These xEV vehicles can be distinguished, for example, as vehicles with battery electric (BEV) drive systems and vehicles with hybrid electric (PHEV) drive systems, in which an internal combustion engine is also incorporated in addition to the electric drive system. It is known that these different drive options result in vastly different structural spaces within the vehicle, housing corresponding assemblies, components, or the like for each drive system. This also causes significant adaptations in the body-in-white of vehicles to date, making the manufacture or assembly of different structural types within a single vehicle structure series significantly more difficult and, in particular, more expensive.

[0003] A significant challenge lies in securing components of the corresponding structural type for the energy storage underbody assembly—used in, for example, battery electric vehicles (BEVs) or hybrid electric vehicles (PHEVs)—to the mounting points of the underbody assembly on the body-in-white side. These mounting points should be usable across structural types for all types of electric drive systems with minimal modification. Therefore, the challenge arises: using a body-in-white side underbody assembly that is as uniform as possible across structural types, while simultaneously enabling the corresponding components of the electric drive system to be secured to the body-in-white side underbody assembly with exceptional reliability and stability, but also with exceptional simplicity and cost-effectiveness. Summary of the Invention

[0004] Therefore, the object of the present invention is to realize an energy storage-bottom assembly that has high flexibility in the assembly of corresponding components in the corresponding structural form of an electric drive device, while also ensuring optimized connection of these components.

[0005] The objective is achieved according to the invention by an energy storage-bottom assembly comprising a bottom assembly on which an energy storage device for an electric drive system of a passenger car is fixed, receiving portions on corresponding sides of the bottom assembly, and corresponding fixing portions in the areas of these receiving portions, wherein the energy storage device can be fixed to the fixing portions, and the receiving portions are fixed below the rear longitudinal beam immediately following the side sill. In a first structural form of the energy storage-bottom assembly for a passenger car with a pure electric drive system, the energy storage device and its corresponding fixing portion on the corresponding receiving portion have corresponding fixing portions adjacent to each other, wherein a crossbar extending in the lateral direction of the vehicle is fixed.

[0006] The objective is also achieved according to the invention by a modular system for such an energy storage-bottom assembly, comprising a bottom assembly spanning structural types, the bottom assembly having a main bottom and a rear bottom and receiving portions on corresponding sides of the bottom assembly, wherein, in a first structural type for a passenger car with a pure electric drive system, an energy storage device is provided extending not only below the main bottom but also below the rear bottom, and the energy storage device is fixed to the receiving portion, and the energy storage device and its corresponding fixing portion on the corresponding receiving portion have corresponding fixing portions with corresponding fixing portions having crossbars extending in the lateral direction of the vehicle fixed thereto; and in a second structural type for a passenger car with a hybrid drive system, an energy storage device extending only below the main bottom is provided; a fuel tank extending below the rear bottom is provided; and corresponding diagonal braces are provided, these diagonal braces being connected to corresponding side sills, to the receiving portions and to the rear axle bracket.

[0007] The energy storage-bottom assembly for an electric-driven passenger car according to the present invention includes a bottom assembly on the body-in-white side, on which the energy storage device of the passenger car's electric drive unit is fixed. Receiving portions on corresponding sides are provided on the bottom assembly, and corresponding fixing points are provided in the areas of these receiving portions, on which the energy storage device can be fixed. These corresponding side receiving portions are preferably provided in the longitudinal direction of the vehicle along an extension line behind the corresponding side sill or in a transition area from the rear end of the side sill to the longitudinal beam immediately following the side sill, in order to realize additional fixing points. These additional fixing points are used across structural types for all structural types of energy storage-bottom assemblies with electric drive units (BEV, PHEV).

[0008] In a first structural form of the energy storage-bottom assembly for battery electric vehicles (BEVs), the side receiving portion is used to reliably secure the energy storage, which is installed there and thus extends far rearward in the longitudinal direction of the vehicle, to the bottom assembly in the rear region. Therefore, a problem often arises here: the energy storage / high-voltage storage is already fixed to the bottom side of the bottom assembly during assembly, followed by the so-called homzeit (final assembly) of the bottom assembly with the vehicle's drivetrain and running gear. During this time gap, it should be especially avoided that the energy storage, with its rear end not directly fixed to the bottom assembly, hangs freely, which may lead to bending and thus damage to the energy storage. Therefore, precisely for the energy storage-bottom assembly used in battery electric vehicles (BEVs), the energy storage is fixed far behind its center of gravity, so that during individual storage assembly, the energy storage / high-voltage storage does not hang freely until the homzeit (final assembly).

[0009] Advantageously, the side receiving portion can also be used to retain, for example, corresponding bracing members used in the energy storage-bottom assembly for hybrid electric vehicles (PHEVs) to connect, for example, the rear axle bracket to the side sill. Here, by means of the receiving portion, the structural node between the side sill, the rear of the associated longitudinal beam, and the footrest plate can be used as an additional connection for the corresponding bracing member, resulting in the energy storage-bottom assembly appearing generally the same in both structural types, namely for battery electric vehicles (BEVs) and hybrid electric vehicles (PHEVs).

[0010] In another advantageous embodiment of the invention, in a first structural form of an energy storage-bottom assembly for a car with a battery electric drive (BEV), the energy storage unit and its corresponding fixing portion on the corresponding receiving portion have corresponding fixing portions for a queerspange extending in the lateral direction of the vehicle. This means that, in a particularly advantageous embodiment of the invention, the front side end of the queerspange is not directly connected to the corresponding body-in-white side receiving portion of the bottom assembly, but more precisely, by means of the energy storage unit. Thus, for example, the height dislocation between the corresponding receiving portion and the corresponding end of the queerspange, which exists in the vertical direction of the vehicle, can be bridged by means of the energy storage unit. Furthermore, by means of the rear region of the energy storage unit, which is correspondingly relatively long in the longitudinal direction of the vehicle, the rear end of the energy storage unit can be directly fixed to the bottom assembly on the one hand, and on the other hand, the illustrated queerspange can also be fixed to the receiving portion of the energy storage unit by means of additional fixing portions, which in particular improve the retention of the energy storage unit in the rear central region of the bottom assembly.

[0011] The particularly advantageous retention or support of this energy storage unit can be achieved in another embodiment of the invention if the crossbar is further connected to the rear axle bracket. This thus achieves a particularly advantageous combination between the rear end of the energy storage unit and the rear axle bracket.

[0012] Furthermore, it has proven advantageous that the fixing portion of the receiving part is used in a second structural form for securing a corresponding diagonal brace in the energy storage-bottom assembly of a passenger car with a hybrid drive system (PHEV). This diagonal brace is connected on one side to the corresponding side sill and energy storage unit, and on the other side to the rear axle bracket. In particular, the receiving part provides additional support for the diagonal brace towards the body-in-white, thus further enhancing the rigidity and stability of the diagonal brace.

[0013] Furthermore, it is advantageous that in both the first and second structural forms of the energy storage-bottom assembly, the same fixing portion of the receiving part is used to fix the crossbar or diagonal brace. Therefore, the receiving part can be used across structural forms in a particularly simple manner.

[0014] In another embodiment of the invention, the receiving portion is disposed in the region of the bottom assembly located behind the main bottom and at the tail bottom. Therefore, by means of the receiving portion, the corresponding anchoring point for the energy storage device, especially for a battery electric vehicle (BEV), is realized rearward in the region of the bottom assembly at the tail bottom.

[0015] The advantages described above in conjunction with the energy storage-bottom assembly according to the invention are applied in the same manner to the modular system according to the invention. This modular system is characterized by a bottom assembly spanning structural types, having a main bottom and a rear bottom, and receiving portions on corresponding sides of the bottom assembly, particularly behind the corresponding side sills, or in the transition area toward the longitudinal beam immediately following behind the side sills or rearwards. In a first structural type for a passenger car with a battery electric drive (BEV), an energy storage device is provided extending not only below the main bottom but also below the rear bottom, and this energy storage device is fixed to the receiving portion; and in a second structural type for a passenger car with a hybrid electric drive (PHEV), an energy storage device is provided extending only below the main bottom; a fuel tank is provided extending below the rear bottom; and corresponding diagonal braces are provided, connecting to the corresponding side sills, the receiving portions, and the rear axle bracket.

[0016] Other features of the invention are derived from the accompanying drawings and the description thereof. The features and combinations thereof mentioned above in the specification, as well as those mentioned below in the description of the drawings and / or shown separately in the drawings, may be applied not only in the correspondingly described combinations, but also in other combinations, or individually. Attached Figure Description

[0017] The present invention will now be explained in more detail with reference to preferred embodiments and the accompanying drawings. The drawings are as follows:

[0018] Figure 1a , 1b These are top and bottom views of the underbody assembly of a cross-structural type for an electric-driven passenger car, which has a pure electric drive unit (BEV) in a first structural type for the energy storage-underbody assembly of the vehicle and a hybrid drive unit (PHEV) in a second structural type for the energy storage-underbody assembly of the vehicle.

[0019] Figure 2 This is a bottom view of the energy storage-bottom assembly of a first structural type for a car with a battery electric drive system (BEV), which has an energy storage unit that extends rearward not only below the main bottom but also below the rear bottom to the horizontal bar.

[0020] Figure 3a , 3b This is a bottom view of the energy storage-bottom assembly according to a second structural type for a passenger car with a hybrid electric vehicle (PHEV), which has an energy storage unit extending only below the main bottom and a fuel tank extending below the rear bottom, wherein... Figure 3b The exhaust system is attached to the fuel tank and is visible.

[0021] Figure 4 Is according to Figure 1a and 1b A partial perspective view of the bottom assembly on the side of the body-in-white, wherein the receiving part provided on the corresponding vehicle side is provided on the rear end of the side sill attached to the side, or on the transition area between the side sill and the rear or inner longitudinal beam immediately behind the side sill.

[0022] Figures 5a-5c A partial perspective view of the energy storage unit for the energy storage unit-bottom assembly according to the first structural type, arranged on the bottom side in the area of ​​the associated receiving portion; a partial bottom view of the energy storage unit-bottom assembly according to the first structural type, wherein a crossbar is provided on the rear end of the energy storage unit, the crossbar being further connected to the rear axle bracket; and a partial perspective view of the energy storage unit-bottom assembly according to the first structural type. Figure 5b A bottom view of the perspective of the horizontal bar in the area of ​​the receiving part corresponding to the side;

[0023] Figure 6 This is a partial perspective view of the rear region of the energy storage unit in a first structural form used as the bottom component of the energy storage unit; and

[0024] Figure 7 It is a partial perspective bottom view of the energy storage-bottom assembly according to the second structural type, wherein the side-attached diagonal brace is fixed to the rear end of the side sill by means of the energy storage and further fixed to the side-attached receiving part. Detailed Implementation

[0025] exist Figure 1a and 1b The bottom assembly 1 of a cross-structure type for an electrically driven passenger car is depicted in top and bottom views. A main bottom 2 is visible, defined on the sides by corresponding side sills 3 and extending forward to a front end wall 4. Immediately following the main bottom 2 forward is a front body structure 5, which includes corresponding motor longitudinal beams or main longitudinal beams 6. On the side of the motor longitudinal beams 6 are corresponding wheel arch members 7, which are provided with corresponding damping strut covers 8 on top.

[0026] The main bottom 2 extends rearward to the footrest wall 9, where it transitions to the rear bottom 10. Viewed longitudinally, in the area of ​​the footrest wall 9, a rear longitudinal beam 11 immediately follows the rear end of the corresponding side sill 3. This longitudinal beam extends inside the corresponding wheel arch member 12 in the area of ​​the rear section 13 to the rear of the vehicle. Furthermore, at the height of the rear wheel arch member 12, a crossbeam 14 extends in the lateral direction of the vehicle, connecting the rear longitudinal beams 11 to each other.

[0027] Additionally, a central groove 15 is visible, which extends forward from the footrest plate 9 to the front end wall 4. Corresponding seat crossbeams 16 are also attached to the central groove 15, extending outward in the lateral direction of the vehicle to the corresponding side sills 3.

[0028] Now we should rely on Figures 2 to 3b Explanation, according to Figure 1a and 1b How the bottom component 1 of the cross-structure type is equipped with different parts so as to either form a first structural type of energy storage-bottom component for a car with a pure electric drive unit (BEV) (such as the first structural type in Figure 2 As shown in [the diagram], or forming a second structural form for the energy storage-bottom assembly of a car with a hybrid electric vehicle (PHEV) (as shown in [the diagram]). Figure 3a and 3b(As shown in the image). In other words, for the two structural types of the energy storage-bottom component (BEV, PHEV), a button is used on the body-in-white side. Figure 1a and 1b The same bottom component 1 is diversified in two different structural forms of the energy storage-bottom component by assembling different parts.

[0029] Therefore, according to the method of the present invention, the first structural form of the energy storage-bottom assembly for a passenger car having a battery electric drive system (BEV) is implemented in such a way that a continuous energy storage device 17 is used not only on the bottom side of the main bottom 2 but also on the bottom side of the rear bottom 10, the energy storage device extending outward in the lateral direction of the vehicle to the corresponding side sill 3. The energy storage device 17 extends forward to the corresponding front longitudinal beam 18, the front longitudinal beam... Figure 1b Visible in the center and extending forward, the main bottom 2 includes a receiving pool 19 for the energy storage 17. The receiving pool 19 is defined outwardly by a side sill 3 and rearwardly by a footrest plate 9. The energy storage 19 extends rearward beyond the footrest plate 9 into the area of ​​the receiving pool 20 below the tail bottom 10, which is defined on the front and rear sides by the footrest plate 19 and a crossbeam 14, and on the outer side by a longitudinal beam 11.

[0030] Specifically, it can be seen that the energy storage device 17 is screwed to the side sill 3 on the outside by means of a corresponding profile 21. Furthermore, it can be seen that the energy storage device 17 is fixed to the crossbeam 18 on the front side by means of a corresponding bolt element via a profile 22.

[0031] according to Figure 2 The rear of the energy storage device 17 in the first structural type is fixed by means of a crossbar 23, which is coupled to the corresponding front outer end 24. Figure 6 The energy storage device is configured in a manner that will be explained in more detail. Furthermore, the crossbar 23 is connected to the rear end of the energy storage device 17 via a corresponding threaded connection 25 and to the rear axle bracket 27 via a corresponding threaded connection 26. Therefore, the energy storage device, or the rear axle bracket 27 separate from the high-voltage storage device 17, can be assembled or disassembled by means of the crossbar 23. Furthermore, by means of the crossbar 23, the energy storage device 17 also does not droop downwards in its rear region, for example, which is connected to the bottom assembly 1. In addition, the crossbar 23 serves as a protector for the energy storage device, for example, when driving alongside a curb, alongside a bollard, or over a bollard.

[0032] exist Figure 3a and 3bThe second structural form of the energy storage-bottom component for a hybrid electric vehicle (PHEV) is visible. Here, it differs from the previous design. Figure 2 In the first structural configuration, an energy storage device 28 is provided, which extends forward or sideways similarly to the energy storage device 17 in the first structural configuration. The energy storage device 28 terminates rearward at least substantially at the footrest wall 9 in the longitudinal direction of the vehicle. Therefore, unlike the first structural configuration, the energy storage device 28 is not located in the area of ​​the rear bottom 10.

[0033] More precisely, there, as by Figure 3b As can be seen, the fuel tank 29 of the internal combustion engine of the car's hybrid electric vehicle (PHEV) is located. Furthermore, by... Figure 3b As can be seen, on the bottom side of the energy storage-bottom assembly, the exhaust device 30 extends from the front part 5 to the rear part 13. Here, the exhaust device 30 extends from the front in a length-partial manner—that is, along the length section 31—within the middle bottom groove 15 of the bottom assembly 1. Furthermore, a channel 32 is provided within the energy storage 28 and along the extension line of the length section 31 of the middle bottom groove 15.

[0034] Finally by Figure 3a Two diagonal bracing members 33 are visible, each fixed to the corresponding side sill 3 at its front end and to the corresponding rear axle bracket 27 at its rear end. Thus, the rear axle bracket 27 and the corresponding side sill 3 are connected via the corresponding diagonal bracing members 33.

[0035] Figure 4 The bottom side of the bottom assembly 1 is shown in a partial perspective view on the left side of the vehicle viewed in the forward direction. The rear end 42 of the corresponding side sill 3 is visible here, transitioning into the side-attached rear longitudinal beam 11 in this rearward region. The footrest wall 9, which divides the main bottom 2 from the rear bottom 10, is also visible. As can now be seen, particularly from the accompanying drawings, a side receiving portion 43 is provided on the front end of the rear crossbeam 11 or in the transition region between the rear end 42 of the side sill 3 and the front end of the rear longitudinal beam 11. This receiving portion is located at the height of the rear bottom 10 when viewed in the longitudinal direction of the vehicle. Here, the receiving portion 43 is currently configured as a sheet metal piece and is joined to the bottom side 44 or inner side 45 of the longitudinal beam 11 via a corner. Other embodiments are also contemplated. A mirror image of, or identically provided, receiving portion 43 is also located on the opposite right side of the vehicle.

[0036] Here, if combined Figure 6 As will be explained further, in the first structural form of the energy storage-bottom assembly for a battery electric vehicle (BEV), the corresponding receiving part 43 is used to secure the energy storage device 28 to the body of the vehicle. This is especially true for... Figure 5a It can be seen that, in Figure 5aIn the middle, the fixation of the energy storage 17, which is of the first structural type of energy storage-bottom assembly, extending in the longitudinal direction of the vehicle to the rear bottom 10, is described in a partial perspective bottom view.

[0037] Hereby Figure 5a As can be seen, the energy storage device 17 is fixed to the receiving part 43 in the region of the outer profile 21 by means of bolts 48 screwed into the threaded holes / fixing parts 51 of the receiving part 43. Furthermore, in the region of the profile 21, a fixing part 47 with an additional sleeve 49 is visible, the sleeve being configured, for example, as a through sleeve, so that it can be fixed by means of bolts or similar fixing elements (especially...). Figure 5b and 5c (As can be seen in the image) the crossbar 23 can be secured. Bolt 50 can therefore be screwed into the threads of sleeve 49, which is fixed to energy storage device 28. Indirect solutions are also possible, where, for example, energy storage device 17 is fixed to threaded hole 51 and the crossbar 23 itself is fixed to energy storage device 17. The current fixing portion 47 of the crossbar 23 on sleeve 49 can therefore be formed either indirectly or directly on energy storage device. However, it is important that the fixing portion 47 for the crossbar 23 is arranged at least adjacent to the associated receiving portion 43 in the vertical direction of the vehicle to achieve an optimized load path or optimized force transmission.

[0038] In addition Figure 5a As can be seen, the last bolt 52 and the other bolt 53 are used to fix the profile 46 of the energy storage device 17 to the bottom side of the side sill 3 on the corresponding vehicle side. Thus, by means of the corresponding receiving part 43, the energy storage device's fixing point is realized at the rear of the last possible fixing point on the side sill 3, thereby realizing, in particular, another rear body fixing point for the energy storage device 17, so that during individual storage device assembly, the rear end of the energy storage device 17 is already fixed on the body-in-white side before the final assembly of the energy storage device-bottom assembly with the running gear components and drive components such as the rear axle bracket 27. Therefore, the corresponding receiving part 43 serves as the last body fixing point for the energy storage device 17 in the longitudinal direction of the vehicle, so that the load can be transferred from the crossbar 23 to the body or bottom assembly 1. Therefore, fixing the energy storage device 17 by means of bolt 48 as a minimal threaded connection is necessary, so that the energy storage device 17 does not freely extend before final assembly and is not subject to corresponding damage.

[0039] Here, with the help of Figure 5b and Figure 5cThe fixing of the crossbar 23 is depicted in the partial bottom view and partial perspective view. It can be seen in particular that the corresponding front end 24 of the crossbar 23 is fixed in the corresponding receiving part 43 by means of the matching bolt 50 and thus fixed to the body-in-white side on the corresponding vehicle side.

[0040] In addition, especially by Figure 5b A total of six threaded connection devices 54 are visible, by means of which the crossbar 23 is connected to the rear end of the energy storage device 17. This provides particularly advantageous support for the energy storage device 17. Furthermore, multiple threaded connection devices 55 are visible, by means of which the crossbar 23 is connected to the rear axle bracket 27. Thus, overall, a particularly advantageous combination of the crossbar 23 and the rear axle bracket 27 is achieved, along with particularly advantageous support for these components on the bottom assembly 1 and advantageous fixation of the energy storage device 17. Another advantage is that not only the crossbar 23 and the energy storage device 17, but also the rear axle bracket 27 can be assembled and disassembled separately, thus avoiding complex assembly processes, for example, when replacing worn components.

[0041] The rear region of the energy storage 17, a first structural type of the energy storage-bottom assembly for a battery electric vehicle (BEV), is described here again with partial perspective view using the accompanying drawings. In particular, it can be seen that in the rear region of the energy storage 17, a crossbar 23 extending in the vehicle's lateral direction is fixed, and the energy storage 17 is connected to a receiving portion 43 fixed to the vehicle body in the connecting region of the crossbar 23. Here, the receiving portion 43 fixed to the vehicle body is fixed to the underside of the rear longitudinal beam 11 on the vehicle body side.

[0042] Figure 7 A partial perspective bottom view shows the receiving portion 43 on the corresponding side of the energy storage-bottom assembly for a hybrid electric vehicle (PHEV). Specifically, the corresponding diagonal brace 33 is fixed to the bottom assembly 1. It is first visible that the diagonal brace 33 is fixed to the rear end of the corresponding side sill 3 by means of a threaded connection 56 at its outer front end. Here, the diagonal brace 23 is fixed by means of, or rather, by a retainer 57 of the profile 46 of the energy storage 28 located in the middle. Furthermore, the diagonal brace is fixed in the corresponding threaded hole 50 of the receiving portion 43 by means of a threaded connection 58. This results in an optimized connection 33 with the side sill 3 and the rear longitudinal beam 11 via the receiving portion 43, and an optimized connection with the footrest plate 9 via the receiving portion 43, thus achieving optimized support for the rear axle bracket 27.

[0043] List of reference numerals

[0044] 1 Bottom Component

[0045] 2 Main Bottom

[0046] 3 side thresholds

[0047] 4 end walls

[0048] 5. Front structure

[0049] 6 main longitudinal beams

[0050] 7 wheel cover parts

[0051] 8 Vibration damping support cover

[0052] 9. Footrest metal plate

[0053] 10 tail bottom

[0054] 11 longitudinal beams

[0055] 12 wheel cover parts

[0056] 13 Rear Section

[0057] 14 crossbeams

[0058] 15 Middle Bottom Groove

[0059] 16 seat crossbeams

[0060] 17 Energy Storage

[0061] 18 longitudinal beams

[0062] 19 Receiving Pool

[0063] 20 receiving tanks

[0064] 21 profile

[0065] 22 profile

[0066] 23 horizontal bars

[0067] 24 end

[0068] 25 threaded connection device

[0069] 26 Threaded connection device

[0070] 27 rear axle bracket

[0071] 28 energy storage devices

[0072] 29 fuel tanks

[0073] 30 Exhaust Equipment

[0074] 31 length segments

[0075] 32 channels

[0076] 33 diagonal brace

[0077] 42 end

[0078] 43 Reception Department

[0079] 44 bottom side

[0080] 45 inner side

[0081] 46 profile

[0082] 47 Fixed parts

[0083] 48 bolts

[0084] 49 sleeve

[0085] 50 bolts

[0086] 51 Fixed parts

[0087] 52 bolts

[0088] 53 bolts

[0089] 54 threaded connection device

[0090] 55 threaded connection device

[0091] 56 Threaded Connection Device

[0092] 57 retainer

[0093] 58 threaded connection device

Claims

1. An energy storage-bottom assembly for an electrically driven passenger car, comprising a bottom assembly (1) on which an energy storage device (17, 28) for an electric drive system of the passenger car is fixed, receiving portions (43) on corresponding sides of the bottom assembly (1), and corresponding fixing portions (51) in the areas of these receiving portions, wherein the energy storage device (17) can be fixed to the fixing portions, and the receiving portions (43) are fixed below the rear longitudinal beam (11) immediately following the side sill (3). Its features are, In a first structural form of an energy storage-bottom assembly for a car with a battery electric drive (BEV), the energy storage (17) has a corresponding fixing part (47) adjacent to its corresponding fixing part (51) on the corresponding receiving part (43) and a corresponding fixing part (47) with a crossbar (23) extending in the lateral direction of the vehicle.

2. The energy storage device-bottom component according to claim 1, characterized in that, The crossbar (23) is connected to the rear axle bracket (27).

3. The energy storage device-bottom component according to claim 1, characterized in that, On the fixed part (51) of the receiving part (43), in the second structural type for the energy storage-bottom assembly of a car with a hybrid drive system (PHEV), a corresponding diagonal brace (33) is additionally fixed, which is connected to the corresponding side sill (3) and energy storage (28) on one hand and to the rear axle bracket (27) on the other hand.

4. The energy storage device-bottom component according to claim 3, characterized in that, In the first and second structural forms of the energy storage-bottom assembly, the same fixing part (51) of the receiving part (43) is used to fix the crossbar (23) or the diagonal brace (33).

5. The energy storage device-bottom assembly according to any one of claims 1 to 4, characterized in that, The receiving part (43) is disposed in the area of ​​the bottom part (10) behind the main bottom part (2) of the bottom component (1).

6. A modular system for an energy storage-bottom assembly of an electrically driven passenger car, comprising a bottom assembly (1) of a cross-structural type, the bottom assembly having a main bottom (2) and a rear bottom (10) and receiving portions (43) on corresponding sides of the bottom assembly, wherein, In a first structural form for a passenger car with a battery electric drive (BEV), an energy storage device (17) is provided, which extends not only below the main bottom (2) but also below the rear bottom (10), and is fixed to a receiving part (43). The energy storage device has a corresponding fixing part (47) adjacent to its corresponding fixing part (51) on the corresponding receiving part (43), to which a crossbar (23) extending in the lateral direction of the vehicle is fixed. In a second structural form for a passenger car with a hybrid drive system (PHEV), there is provided an energy storage device (28) that extends only below the main bottom (2); a fuel tank (29) that extends below the rear bottom (10); and corresponding bracing members (33) that are connected to corresponding side sills (3), to receiving parts (43), and to rear axle brackets (27).

Images