Partial body for an at least part-electrically operated motor vehicle, and motor vehicle

Abstract

A partial body for an at least part-electrically operated motor vehicle includes a first receiving portion for a traction battery and a second receiving portion for an electric drive unit. The receiving portions are arranged behind one another with respect to a vehicle longitudinal direction and are arranged at least partially at the same height with respect to a vehicle vertical direction. Here, a body transverse wall, which is of double-walled design at least in certain portions and which extends in the vehicle vertical direction and vehicle transverse direction, is arranged between the first and second receiving portion such that, in the event of an accident-induced displacement of the drive unit in the direction of the traction battery. The drive unit can be supported on the body transverse wall in a targeted manner.

Claims

1. A partial body for an at least part-electrically operated motor vehicle, said partial body comprising: at least one first receiving portion for at least one traction battery, the at least one traction battery including a battery housing and battery cells enclosed within the battery housing, at least one second receiving portion for at least one electric drive unit in the form of an electric motor, wherein the receiving portions are arranged behind one another with respect to a vehicle longitudinal direction and are arranged at least partially at the same height with respect to a vehicle vertical direction, wherein at least one body transverse wall, separate from the battery housing, which is of double-walled design at least in certain portions and which extends in the vehicle vertical direction and vehicle transverse direction, is arranged between the first and second receiving portion such that, in an event of an accident-induced displacement of the drive unit in the direction of the traction battery, the drive unit is supported on the body transverse wall in a targeted manner, wherein the at least one body transverse wall comprises at least two walls arranged behind one another in the vehicle longitudinal direction, and a plurality of supporting walls which connect the two walls to one another, and wherein each of the two walls is thicker than the supporting walls.

2. The partial body as claimed in claim 1, wherein a lower edge of the body transverse wall is arranged at a same depth as or deeper than a lower edge of the traction battery mounted as intended in the first receiving portion and/or of the drive unit mounted as intended in the second receiving portion.

3. The partial body as claimed in claim 1, wherein, at least in an envisioned displacement direction of the drive unit, the body transverse wall is supported on at least one body supporting structure in a form-fitting manner and/or wherein the body transverse wall is connected to at least one body supporting structure by a plurality of joining points.

4. The partial body as claimed in claim 3, wherein the body supporting structure comprises at least one floor panel and/or at least one rocker panel and/or at least one body tunnel.

5. The partial body as claimed in claim 3, wherein the body transverse wall is connected to the body supporting structure at least in an upper portion and/or at least at the sides.

6. The partial body as claimed in claim 1, wherein at least one of the supporting walls is arranged at right angles with respect to the two walls and at least two of the supporting walls are arranged adjacently to the wall and run at an acute angle to one of the two walls.

7. The partial body as claimed in claim 1, wherein the body transverse wall is provided by at least two profile elements arranged above one another, or wherein the body transverse wall comprises at least one profile element and at least one wall connected to the profile element, wherein the profile element and the wall are arranged above one another and/or behind one another.

8. The partial body as claimed in claim 1, wherein the body transverse wall is connected to at least one body floor element, and wherein the body floor element comprises at least one supporting portion on which the body transverse wall is supported in a form-fitting manner.

9. The partial body as claimed in claim 1, wherein the body transverse wall is connected to at least one body end wall and bears against the body end wall in a form-fitting manner in the direction of forward travel.

10. The partial body as claimed in claim 9, wherein the body transverse wall is arranged at least in certain portions between the body floor element and the body end wall.

11. The partial body as claimed in claim 1, wherein the body transverse wall is connected to at least one protective plate for protecting the traction battery from roadside attacks.

12. The partial body as claimed in claim 1, wherein the body transverse wall comprises at least one passage opening for accommodating at least one electrical supply line for the traction battery, at least one hydraulic supply line for the traction battery, and/or the drive unit.

13. A motor vehicle, which can be at least part-electrically operated, comprising the at least one partial body as claimed in claim 1, the at least one traction battery received on the partial body, and the at least one drive unit received on the partial body.

14. The partial body as claimed in claim 1, further comprising an empty space disposed between the double walls of the body transverse wall.

15. The partial body as claimed in claim 1, further comprising the at least one traction battery positioned within the at least one first receiving portion.

16. The partial body as claimed in claim 1, further comprising the at least one electric drive unit positioned within the at least one second receiving portion.

17. The partial body as claimed in claim 16, wherein the electric drive unit is assigned to an axle for powering wheels of that axle.

18. The partial body as claimed in claim 17, further comprising the at least one traction battery positioned within the at least one first receiving portion.

19. The partial body as claimed in claim 1, wherein no intervening features are positioned between the traction battery and the at least one body transverse wall, and no intervening features are positioned between the electric motor and the at least one body transverse wall.

20. The partial body as claimed in claim 1, wherein the electric motor is spaced apart from the at least one body transverse wall by a greater distance than the traction battery is spaced apart from the at least one body transverse wall.

21. The partial body as claimed in claim 1, wherein the traction battery and the electric motor are spaced equidistant from the at least one body transverse wall.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

(1) Further advantages and features of the present invention will become apparent from the exemplary embodiments which are explained below with reference to the appended figures.

(2) In the figures:

(3) FIG. 1 shows a highly schematic illustration of a partial body according to aspects of the invention of a motor vehicle in a sectional side view; and

(4) FIG. 2 shows a highly schematic illustration of a further partial body according to aspects of the invention of a motor vehicle in a sectional side view.

DETAILED DESCRIPTION OF THE INVENTION

(5) FIG. 1 shows a detail illustration of a motor vehicle 100 which is equipped with a partial body 10 according to aspects of the invention. The partial body 10 comprises a first receiving portion 1 for a traction battery 101 of the motor vehicle 100. The traction battery 101 here takes the form of an underfloor battery and serves to supply energy to an electric drive unit 102 for a front axle.

(6) To receive the underfloor battery, the first receiving portion 1 is arranged in the underfloor region and is situated here below a body floor element 5 in the form of a floor panel 14. To receive the drive unit 102, the partial body 10 has a second receiving portion 2 in the front end.

(7) The receiving portions 1, 2 are arranged here behind one another and at the same height. In the event of a frontal crash, a displacement of the drive unit 102 in the direction of the traction battery 101 can occur. In order to reliably protect the traction battery 101, the partial body 10 comprises a body transverse wall 3 which is arranged vertically here.

(8) The body transverse wall 3 is here supported on a body supporting structure 4 in a form-fitting manner with respect to the accident-induced displacement direction of the drive unit 102. Serving as a body supporting structure 4 in the example shown here is a body floor element 5 in the form of a floor panel 14. The floor panel 14 here has an angled supporting portion 15 on which the body transverse wall 3 is supported.

(9) Moreover, the body transverse wall 3 is fixedly connected here to a body end wall 34. Thus, the body transverse wall 3 is arranged here between the floor panel 14 and the body end wall 34 and supported on both of them.

(10) The body transverse wall 3 can be fixedly connected to and in particular supported in a form-fitting manner on further body supporting structures 4 which are not illustrated here in further detail. Use can be made for example of a rocker panel 24, which is not illustrated here in any further detail, or else of a body tunnel or the like as body supporting structure 4. For example, two rocker panels 24 serve for the lateral connection of the body transverse wall 3.

(11) On the body transverse wall 3 there is here mounted a protective plate 6 for protecting the traction battery 101 from roadside attacks. The protective plate 6 closes the first receiving portion 1 in the road direction. Additionally or alternatively to the protective plate 6, an underfloor cladding or the like can also be fastened to the body transverse wall 3.

(12) The body transverse wall 3 is provided here by a profile element 33 which takes the form of an extruded profile and is made, for example, of aluminum. The profile element 33 is here a hollow profile having a plurality of supporting walls 23 running in the interior. The supporting walls 23 connect a battery-side wall 13 to a drive-side wall 13 of the body transverse wall 3. The supporting walls 23 run here at right angles and obliquely to the walls 13.

(13) In addition to the profile element 33, the body transverse wall 3 can also comprise panels which are not illustrated in any further detail here, said panels forming further walls 13 or supporting walls 23. It is possible for example for there to be provided a composite body made up of the profile element 33 or further profile elements 33 and one or more panels.

(14) Alternatively to the embodiment shown here, the body transverse wall 3 can also be produced from fixedly interconnected panels. The walls 13 and the supporting walls 23 are then in each case provided by corresponding panels. For example, aluminum panels or steel panels or the like can be provided for this purpose.

(15) The partial body 10 can have a further second receiving portion 2 (not shown here) for a drive unit 102 of the rear axle. A further body transverse wall 3 as protective separation from the first receiving portion 1 is preferably then provided between the further second receiving portion 2.

(16) FIG. 2 shows in the form of a detail a motor vehicle 100 equipped with a partial body 10 according to aspects of the invention. As in FIG. 1, there is here provided a traction battery 101 in the form of an underfloor battery for supplying energy to an electric drive unit 102. In this case, however, the drive unit 102 for the rear axle is shown here. In addition, in the region shown here, the traction battery 101 is multistory or equipped with a plurality of battery levels 111. The detail shown here can belong to the motor vehicle 100 described with respect to FIG. 1 or be part of another motor vehicle 100.

(17) The second receiving portion 2 is arranged here behind the first receiving portion 1 in the direction of forward travel and serves for receiving the drive unit 102 of the rear axle. In order to protect the traction battery 100 from an accident-induced displacement of the drive unit 102 in the event of a rear impact, the partial body 10 comprises a body transverse wall 3 arranged between the receiving spaces 1, 2.

(18) The way in which the body transverse wall 3 is connected or supported is not illustrated in further detail in the section plane shown here and occurs for example by way of suitable body supporting structures 4. For this purpose, there is for example provided a connection to the rocker panel 24 and preferably also a form-fitting support of the body transverse wall 3 in the upper region. To cover the first receiving portion 1, there can be provided a protective plate 6 which is not illustrated in further detail here.

(19) The body transverse wall 3 here comprises two walls 13 which are arranged behind one another in the vehicle longitudinal direction. The walls 13 are connected via a plurality of supporting walls 23. In this case, there is here provided in certain portions an arrangement of the supporting walls 23 in which a supporting wall 23 running at right angles to the walls 13 is neighbored by two supporting walls 23 running at an acute angle thereto. Between these arrangements there are here provided further supporting walls 23.

(20) The arrangement of the walls 13 and supporting walls 23 which is shown here allows particularly targeted support and at the same time offers particularly targeted deformation in the event of impingement by the drive unit 102. An advantageous deformation within the body transverse wall 3 is thereby achieved. It is additionally possible thereby to avoid undesired deformations of the drive-side wall 13 that could otherwise press through as far as the traction battery 101.

(21) The body transverse wall 3 is provided here by a plurality of profile elements 33 arranged above one another. The profile elements 33 here take the form of aluminum extruded profiles and are fixedly connected to one another. In this case, the lower profile elements 33 are arranged here to be upright and the uppermost profile element 33 to be horizontal. The vertical walls 13 of the profile elements 33 are arranged here with a partial overlap.

(22) Additionally or alternatively to the profile elements 33, the body transverse wall 3 can also comprise panels. For example, the panel can be used to connect the profile elements 33 which reinforce vertical walls 13 or else provide supporting walls 23.

(23) In the figures illustrated here, the dimensioning of the supporting walls 23 and of the walls 13 is not illustrated true to scale. In particular, the walls 13 are configured to be thicker than the supporting walls 23 in order to achieve optimal support and targeted deformation.

(24) The body transverse wall 3 can be equipped with one or more passage openings 7 not illustrated in further detail here, for example for cooling lines and/or high-voltage lines.

(25) The invention presented here offers particularly robust compliance with the crash requirements for electric vehicles. Here, the invention achieves particularly secure accommodation of the traction battery 101 and at the same time a considerable weight reduction and cost reduction for the protective measures. Particularly advantageous is the body transverse wall 3, which represents an integration of the protective measures into the body. It is thus possible for example to dispense with an often heavy battery case of elaborate construction or with other protective measures arranged outside the body.

(26) TABLE-US-00001 List of reference signs: 1 Receiving portion 2 Receiving portion 3 Body transverse wall 4 Body supporting structure 5 Body floor element 6 Protective plate 7 Passage opening 10 Partial body 13 Wall 14 Floor panel 15 Supporting portion 23 Supporting wall 24 Rocker panel 33 Profile element 34 Body end wall 100 Motor vehicle 101 Traction battery 102 Drive unit 111 Battery level