DE102008061493A1 - Motor vehicle, particularly hybrid vehicle, has base tunnel and container, where hollow profile is formed for providing receiving chamber for container by container carrier and base element of base tunnel - Google Patents

Abstract

The motor vehicle (1) has a base tunnel (4) and a container (5). The container is provided for receiving of electrical storage elements, operating substance, particularly fuel, and energy medium, particularly for hydraulic and pneumatic system, which is arranged on a container carrier (6). A hollow profile is formed for providing a receiving chamber for container by a container carrier and a base element (7) of the base tunnel.

Description

The The invention relates to a motor vehicle with a floor tunnel and at least a container for receiving electrical storage elements, Operating materials and / or energy media according to the preamble of patent claim 1. The invention further relates to a method for operating such a motor vehicle.

In the recent past, due to the ever-decreasing supply of fuels for the internal combustion engine drive of automobiles, great efforts are being made to provide alternative drive types. Increasingly important is the electromotive drive, which is supplied with electrical energy from a fuel cell and / or a battery. Vehicle containers are to be provided for the aforementioned power supplies, which are designed, for example, as a hydrogen tank for fuel cell operation or are part of a battery system. For example, lithium-ion batteries are increasingly favored by experts as so-called traction batteries or traction batteries, which in turn advantageously have no memory effect and little self-discharge. Regardless, the efficiency of such accumulators or batteries is temperature dependent and decreases sharply at low temperature. Also, when using Li-ion batteries, the danger potential emanating from the same is not to be underestimated. Thus, mechanical damage can lead to internal short circuits and excessive current, the housing can melt and rise in flames. All these imponderables require special safety measures in order to safely operate motor vehicles driven by an electric motor and to be able to implement them as standard vehicles. With regard to this describes the US 5,833,023 A a floor structure for an electric vehicle, which in turn is formed by a plurality of juxtaposed and extending in the vehicle longitudinal direction closed hollow profile structures. Within said hollow profile structures, a plurality of energy stores for supplying an electric motor can be arranged axially one behind the other. The DE 102 24 884 A1 further describes a motor vehicle, in particular passenger cars, with sills, which in turn have a suitable for receiving the motor vehicle batteries or accumulators suitable profile cross-sectional shape. From the DE 40 32 605 A1 furthermore, a motor vehicle driven by an electric motor is known, the batteries of which are arranged behind one another in a hollow profile extending in the vehicle longitudinal direction, in particular a central torsion tube of the vehicle substructure. A similar solution to this solution for accommodating a plurality of batteries within a center tunnel is also the US 4 216 839 A can be seen, wherein a plurality of batteries in the vehicle longitudinal direction arranged one behind the other are provided on a bottom member carrying the same, wherein said bottom member is fixed to flange portions of a center tunnel. The US 7 240 752 B2 In contrast, proposes the arrangement of a plurality of batteries in the vehicle transverse direction within a container, which in turn is connected to a heating and cooling system of the vehicle. Finally, with the DE 44 12 450 A1 discloses an arrangement of a drive unit in an electric vehicle, which has at least one electric motor, a fuel cell and a fuel tank. In essence, it is proposed to provide as a support structure for the fuel cell stack two spaced-apart side members, wherein the fuel cell stack is mounted between the side rails in the underfloor area of the vehicle. In addition, two spaced-apart cross beams may be provided which extend at least over the area between the longitudinal beams. As a result, a kind of security area is to be formed, in which sensitive components of the drive unit are protected from damage. For safety reasons, the fuel tank is arranged between the two longitudinal members behind the rear axle of the vehicle or in the region of the front seats.

task The invention is to provide a further improved motor vehicle a floor tunnel and at least one container for receiving of electrical storage elements, supplies and / or energy media, which is arranged on a container carrier, to create, with minimal effort increased safety Requirements regarding the accommodation of at least a container in or on the motor vehicle is fair. According to one Another aspect of the invention is a method for operating a Such motor vehicle can be specified.

outgoing from a motor vehicle with a floor tunnel and at least one Container for receiving electrical storage elements, Fuels, in particular fuels, and / or energy media, especially for hydraulic and / or pneumatic systems, which is arranged on a container carrier, the task is solved by the fact that Container carrier and a cross-sectionally U-shaped Floor element of the floor tunnel a closed in cross-section hollow profile to provide a receiving space for said container is formed.

By this measure is a shieldable against adverse external influences and easy equippable receiving space created for the at least one container.

The Subclaims describe preferred developments or Embodiments of the invention.

After that can the ground tunnel in vehicle longitudinal or transverse be arranged running in the vehicle. Advantageously, the Further, the container carrier with the container form an assembly that has a fastening system on flange portions of the U-shaped bottom element of the floor tunnel fixable and with the latter from the motor vehicle underside ago Can be fixed to corresponding flange areas of the floor tunnel is, whereby a stable composite is created, which is a high Crash safety for the located in the ground tunnel at least offers a container. Next advantageous in cross section closed hollow profile through the container carrier in two separate and stacked cavities in the manner of a double hollow section with an upper, the receiving space for the container forming cavity, as well as with a lower, serving as an underrun protection cavity divided be, wherein the lower cavity is a deformation space and an energy absorption by deformation of the U-shaped bottom element allowed. This measure is the crash safety for the at least one container even further elevated. As the invention still provides, the container carrier a recording profile for laying an exhaust system of an internal combustion engine be assigned. It is advantageous if the container carrier itself is formed with such a receiving profile. In training The invention may be at least closed in cross section hollow profile in the region of the formed receiving space for the container as a security cell with a frame structure, in particular a Tubular frame structure, be formed. Furthermore, it can also be displayed be in the attachment area between the floor tunnel, the container carrier and to provide the bottom element with a sealing arrangement, the disadvantageous Environmental influences on the container and / or any from an example defective container outgoing disadvantageous Influences on the environment are prevented, or at least hindered. Furthermore, advantageously the receiving space for the container and / or the container itself to an existing Climate system of the motor vehicle to regulate the temperature of from the container received electrical storage elements, Operating materials and / or energy media can be connected or be connected. In that regard, it may be a controller prove to be expedient with which the temperature within the vehicle interior also by the temperature condition of the container and / or its contents can be influenced. As well a control unit may prove to be appropriate, with the the climate system and / or the temperature condition of a Traction battery trained container also incorporating a per se known and fuel-driven generator can be influenced. Next, a control unit of advantage be, which is designed such that at ambient temperature below a predetermined threshold, the heating of a traction battery trained container opposite the heating of the motor vehicle interior, and / or that at ambient temperature Above a predetermined threshold, the cooling of a as a traction battery trained container opposite the cooling of the motor vehicle interior is a priority. Said priority can be in the control unit over a temporal sequence can be defined. Also can different intensities due to said priority the respective heating and / or cooling capacities defined will be. It is also conceivable and accordingly by the invention covers, the receiving space for the container and / or the container itself a ventilation device attributed, which in combination with the above Air conditioning system of the motor vehicle or in isolation a ventilation, in particular also cooling of the container and its Content is allowed. Furthermore, the container on his Outer contour advantageously a contact field with Connecting elements for electric current, operating materials and / or energy media having leading lines, wherein said connection elements can be coupled with mating connection elements are, which are associated with a body part of the motor vehicle. The coupling between the connection elements and the mating connection elements can thereby comfortably by retracting the container from the Motor vehicle underside forth in the ground tunnel in accomplishable be. The invention also includes at least one of the containers assigned as well as manually operated and / or automatically in Dependence on signals provided by sensors switching safety switch for activation and / or deactivation of the line flow. The safety switch can be used for manual operation and / or maintenance advantageously from the interior of the motor vehicle ago be accessible. What already mentioned above Mounting system for mounting the assembly of container carrier and Concerning container including floor element on the ground tunnel, is the same preferably by means of simple and known mechanical Fasteners designed as a quick-change system, wherein the same advantageous a lift truck for equipping the Floor tunnels with the assembly of container carrier and container including floor element of the motor vehicle underside includes.

The invention further includes a motor vehicle with a floor tunnel in the form of a center tunnel and at least one container for receiving electric storage elements, operating materials and / or energy media, wherein a front axle of the motor vehicle, a first, formed of an electric motor and a transmission drive set, and a rear axle of the motor vehicle, a second, from an electric motor and a transmission formed drive set is associated, and said drive sets are executed identical. In this case, the electric motor in the direction of travel of the motor vehicle is advantageously arranged running in front of the front axle or rear axle. With regard to at least one arranged in the center tunnel container seen in the vehicle longitudinal direction is particularly advantageous between the gears of the two drive sets arranged, whereby increased protection of at least one container in the event of a crash, in particular during any frontal or rear crash is effected. Further advantageously, power electronics are arranged on a side of the associated transmission opposite the respective electric motor.

The The invention will be described below with reference to the drawings illustrated embodiments explained in more detail. Show it:

1 3 shows the longitudinal section of a motor vehicle designed according to the invention with a floor tunnel and a container according to a first embodiment variant,

2 3 shows the longitudinal section of a motor vehicle designed according to the invention with a floor tunnel and a container according to a second embodiment variant,

3 a first embodiment of the floor tunnel together with container in cross section,

4 a second embodiment of the floor tunnel together with container in cross section,

5 the perspective item view of the container,

6 the partial view of a connection element of the container for an electrical current-carrying line and a corresponding mating connection element of the body of the motor vehicle,

7 the detail "Z" after 6 , and

8th the soil structure of an inventively designed motor vehicle with only electric drives.

1 then shows very schematically a motor vehicle 1 , in the present case a hybrid vehicle, with a known internal combustion engine arranged in the front region thereof 2 and a rear end of the same arranged per se known electric motor 3 , There is also a floor tunnel 4 , In the present case, a center tunnel is shown, which is known to extend in the vehicle longitudinal direction. In said ground tunnel 4 respectively center tunnel is at least one container 5 for receiving electrical storage elements, for example in the form of a battery or a rechargeable battery, such as a Li-ion battery, arranged.

2 shows in contrast a motor vehicle 1 , in the form of an electric vehicle, with a ground tunnel 4 , in turn, running transversely in the motor vehicle 1 is arranged.

Both motor vehicles 1 is mean that the container 5 on a container carrier 6 is arranged and through the container carrier 6 and a cross-sectionally U-shaped bottom element 7 of the ground tunnel 4 a closed in cross-section hollow profile for providing a receiving space for said container 5 is formed, whereby, as already stated above, a shieldable against adverse external influences and easily equippable receiving space for the container 5 is created (esp. 3 ).

The container carrier 6 forms with the container 5 an assembly, which in turn has a fastening system 8th , in the present case via known mechanical fastening elements in the form of known screw connections, on flange areas 9 of the U-shaped bottom element 7 fixable and with the latter from the motor vehicle underside at corresponding flange areas 10 of the ground tunnel 4 is determinable.

Instead, it is also conceivable to provide a not-shown quick-change system in the manner of a bayonet or snap closure or the like, which in combination with a likewise not shown, but known per se pallet truck a more comfortable placement of the ground tunnel 4 from the motor vehicle underside with the assembly of container carrier 6 and containers 5 including U-shaped floor element 7 allowed.

Advantageously, in the attachment area between the floor tunnel 4 , the container carrier 6 and the floor element 7 a non-illustrated, but known per se sealing arrangement are provided, the adverse environmental influences on the container 5 and / or any of a defective container, for example 5 prevent, but at least hinder, outgoing adverse environmental effects.

The 1 to 4 is further ent take that in the cross section closed hollow profile through the container carrier 6 in two separate and stacked cavities 11 . 12 in the manner of a double hollow section with an upper, the receiving space for the container 5 forming cavity 11 , as well as with a lower, serving as an underrun protection cavity 12 is divided.

The lower cavity 12 In this case, advantageously represents a so-called deformation space, which in the event of a crash, ie, in particular when touching the ground, an energy absorption by deformation of the U-shaped bottom element 7 allowed without the container 5 or the electrical storage elements are damaged or otherwise impaired.

If the motor vehicle is designed as a hybrid vehicle, it may be as in 4 optionally offer, especially when using the motor vehicle in areas with predominantly cold to very cold ambient temperatures, the container carrier 6 with a recording profile 13 for laying an exhaust system 14 in the present case form an exhaust pipe or such a profile, for example separately prepared profile on the container carrier 6 set and said exhaust system 14 within the lower cavity 12 to lead to the container 5 or to keep its contents in the form of electrical storage elements at a specific, necessary for the use of electrical storage elements temperature.

As in particular in the 1 to 3 further shown is the closed in cross-section hollow profile of the floor tunnel 4 in this case in the region of the upper cavity 11 or in the region of the formed receiving space for the container 5 designed as a safety cell by a frame structure 15 , In this case, a tubular frame structure, to protect the container 5 before any outside on the floor tunnel 4 acting increased forces due to, for example, a crash event is provided.

Next, the receiving space for the container 5 and / or as in 5 through a connection part 16 for supplying and removing warm or cold air 17 indicated, the container 5 even to an existing air conditioning system of the motor vehicle 1 to regulate the temperature of the container 5 recorded electrical storage elements connected or connected.

In that regard, an unspecified electronic control device is preferably provided to accomplish said temperature regulation, which depends on the currently sensed temperature condition of the container 5 and / or its contents, the heating or cooling of the container 5 and / or controls its contents.

It lends itself here to provide a control device with which the temperature within the vehicle interior also by the temperature condition of the container 5 and / or its content can be influenced. Thus, it is conceivable, for example, that by means of a trained as a traction battery container 5 generated heat is advantageously conducted into the vehicle interior, rather than discharged into the environment (not shown in detail).

Furthermore, a control device can be provided, with which the air conditioning system and / or the temperature state of a trained as a traction battery container 5 can also be influenced by including a known, fuel-driven generator by heat generated by the same the climate system and / or said container 5 provided or supplied (not shown).

Finally, a control device may be provided, which is designed such that at a certain ambient temperature below a predetermined threshold, the heating of a trained as a traction battery container 5 with respect to the heating of the motor vehicle interior and / or that at a certain ambient temperature above a predetermined threshold, the cooling of a trained as a traction battery container 5 is a priority over the cooling of the motor vehicle interior, wherein said priority in the control unit is preferably defined by a temporal sequence. However, it is also conceivable and accordingly covered by the invention that different priority intensities of the respective heating and / or cooling powers are defined by the priority. In that regard, therefore, the proper function of the traction battery is primarily seen before the possible well-being of the vehicle occupants.

In addition to the above-described air conditioning system, the receiving space for the container 5 and / or the container 5 itself also be associated with a ventilation device not shown in detail but known per se, whereby, as already explained above, a ventilation, in particular cooling the container 5 and its content is permitted by means of ambient air.

According to the 5 and 6 the container has 5 via a contact field 18 with connection elements 19 for electrical power lines leading from the container 5 recorded electrical storage elements, for example in the form of a traction battery.

The said connection elements 19 are according to 6 with mating connection elements 20 coupled, in turn, a body part of the motor vehicle 1 , suitably the floor tunnel 4 assigned. connection elements 19 and mating connection elements 20 are presently designed as form-locking elements, which is a simple contact alone by retracting the container 5 from the vehicle underside in the ground tunnel 4 allow in.

Furthermore, the container 5 at least one manually operable and / or self-switching in response to signals provided by means of sensors safety switch 21 assigned to activate and / or deactivate the line flow ( 5 and 7 ). For example, it makes sense to use the safety switch 21 Depending on the driving condition of the motor vehicle (drive / standstill or ignition key on / off) and / or depending on a sensed crash event, for example, in combination with the triggering of an airbag to turn off in the present case, ie, the electrical / n line / s to separate.

The safety switch 21 is advantageously from the interior of the motor vehicle 1 for manual operation and / or maintenance by a closable flap, not shown in the floor tunnel 4 accessible through.

8th finally shows the floor structure of an inventively designed motor vehicle 1 with a floor tunnel 4 in the form of a central tunnel and two containers arranged axially one behind the other in said central tunnel 5 for receiving electrical storage elements, in the present case in the form of traction batteries.

Both the front axle 22 as well as the rear axle 23 is ever a drive set, consisting of an electric motor 24 . 25 and a gearbox 26 . 27 assigned. The said drive sets are advantageously designed identical and in the direction of travel according to the direction of travel arrow 28 seen, in front of the front axle 22 / Rear axle 23 running arranged.

The in the ground tunnel 4 or central tunnel arranged container 5 respectively traction batteries are seen in the vehicle longitudinal direction between the gears 26 . 27 arranged the two drive sets, whereby in the event of a frontal or rear crash increased protection of the batteries is given by said transmission 26 . 27 advantageously absorb the abutment and / or lead past the batteries in the vehicle body without damaging the batteries.

On the respective electric motor 24 . 25 opposite side of the associated transmission 26 . 27 is expediently each known per se power electronics 29 . 30 for the electric motor 24 . 25 arranged.

The above embodiment essentially relies on a motor vehicle 1 with at least one in the ground tunnel 4 arranged container 5 in which electrical storage elements, such as traction batteries, are arranged. However, the invention is not limited to this embodiment, but also covers embodiments with at least one in the ground tunnel 4 arranged container 5 , which in turn consumes operating materials, in particular fuels, for example for a fuel cell, or energy media (print media) for known hydraulic and / or pneumatic systems.

1

motor vehicle

2

internal combustion engine

3

electric motor

4

floor tunnel

5

container

6

container carrier

7

floor element

8th

fastening system

9

Flange areas (floor element 7 )

10

Flange areas (floor tunnel 4 )

11

(Upper) cavity

12

(Bottom) cavity

13

Up profile

14

exhaust system

15

frame structure

16

connector

17

air

18

Contact field

19

connecting element

20

Against connecting element

21

safety switch

22

Front

23

rear axle

24

electric motor

25

electric motor

26

transmission

27

transmission

28

Direction arrow

29

power electronics

30

power electronics

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 5833023 A [0002]
• - DE 10224884 A1 [0002]
• - DE 4032605 A1 [0002]
• - US 4216839 A [0002]
• - US 7240752 B2 [0002]
• - DE 4412450 A1 [0002]

Claims (27)

Motor vehicle ( 1 ) with a floor tunnel ( 4 ) and at least one container ( 5 ) for receiving electrical storage elements, operating materials, in particular fuels, and / or energy media, in particular for hydraulic and / or pneumatic systems, which are mounted on a container carrier ( 6 ), characterized in that by the container carrier ( 6 ) and a cross-sectionally U-shaped bottom element ( 7 ) of the ground tunnel ( 4 ) a closed cross-section hollow profile for providing a receiving space for said container ( 5 ) is formed. Motor vehicle ( 1 ) according to claim 1, characterized in that the ground tunnel ( 4 ) in the vehicle longitudinal direction or transversely in the motor vehicle ( 1 ) is arranged. Motor vehicle ( 1 ) according to claim 1 or 2, characterized in that the container carrier ( 6 ) with the container ( 5 ) forms an assembly, which via a fastening system ( 8th ) on flange areas ( 9 ) of the U-shaped bottom element ( 7 ) of the ground tunnel ( 4 ) and with the latter from the motor vehicle underside at corresponding flange areas ( 10 ) of the ground tunnel ( 4 ) is determinable. Motor vehicle ( 1 ) according to one of claims 1 to 3, characterized in that the hollow profile closed in cross-section through the container carrier ( 6 ) in two separate and superimposed cavities ( 11 . 12 ) in the manner of a double hollow profile with an upper, the receiving space for the container ( 5 ) forming cavity ( 11 ), and with a lower, serving as an underrun protection cavity ( 12 ), wherein the lower cavity ( 12 ) represents a deformation space and an energy absorption by deformation of the U-shaped bottom element ( 7 ). Motor vehicle ( 1 ) according to one of claims 1 to 4, characterized in that the container carrier ( 6 ) a recording profile ( 13 ) for laying an exhaust system ( 14 ) of an internal combustion engine is assigned or that the container carrier ( 6 ) trains such. Motor vehicle ( 1 ) according to one of claims 1 to 5, characterized in that the hollow profile closed in cross-section at least in the region of the formed receiving space for the container ( 5 ) as a security cell with a frame structure ( 15 ), in particular a tubular frame structure, is formed. Motor vehicle ( 1 ) according to one of claims 1 to 6, characterized in that in the fastening area between the floor tunnel ( 4 ), the container carrier ( 6 ) and the floor element ( 7 ) A seal arrangement is provided. Motor vehicle ( 1 ) according to one of claims 1 to 7, characterized in that the receiving space for the container ( 5 ) and / or the container ( 5 ) even to an air conditioning system of the motor vehicle ( 1 ) for regulating the temperature of the container ( 5 ) Recorded electrical storage elements, supplies and / or energy media is connected or connected. Motor vehicle ( 1 ) according to claim 8, characterized by a control device, with which the temperature within the motor vehicle interior also by the temperature condition of the container ( 5 ) and / or its content can be influenced. Motor vehicle ( 1 ) according to claim 8 or 9, characterized by a control unit with which the air conditioning system and / or the temperature condition of a traction battery container ( 5 ) can be influenced even with the inclusion of a fuel drivable generator. Motor vehicle ( 1 ) according to any one of claims 8 to 10, characterized by a control device, wherein at ambient temperature below a predetermined threshold, the heating of a traction battery formed as a container ( 5 ) is given priority over the heating of the motor vehicle interior. Motor vehicle ( 1 ) according to one of claims 8 to 11, characterized by a control device, in which, at ambient temperature above a predetermined threshold, the cooling of a container formed as a traction battery ( 5 ) is prioritized over the cooling of the motor vehicle interior. Motor vehicle ( 1 ) according to claim 11 and / or 12, characterized in that the priority is defined in the control unit over a time sequence. Motor vehicle ( 1 ) according to claim 11 and / or 12, characterized in that different priority intensities of the respective heating and / or cooling powers are defined by the priority. Motor vehicle ( 1 ) according to one of claims 1 to 14, characterized in that the receiving space for the container ( 5 ) and / or the container ( 5 ) itself is associated with a ventilation device. Motor vehicle ( 1 ) according to one of claims 1 to 15, characterized in that the container ( 5 ) on its outer contour a contact field ( 18 ) With Connection elements ( 19 ) for electrical power, supplies and / or energy media leading lines and the connection elements ( 19 ) with mating connection elements ( 20 ) are coupled, which are associated with a body part of the motor vehicle. Motor vehicle ( 1 ) according to claim 16, characterized in that the coupling between the connecting elements ( 19 ) and the mating connection elements ( 20 ) by retracting the container ( 5 ) from the motor vehicle underside into the ground tunnel ( 4 ) can be accomplished. Motor vehicle ( 1 ) according to claim 16 or 17, characterized in that the container ( 5 ) at least one manually operable and / or automatically switching in response to signals provided by means of sensors signals safety switch ( 21 ) is assigned to the activation and / or deactivation of the line flow. Motor vehicle ( 1 ) according to claim 18, characterized in that the safety switch ( 21 ) for manual operation and / or maintenance of the interior of the motor vehicle ( 1 ) is accessible. Motor vehicle ( 1 ) according to claim 3, characterized in that the fastening system ( 8th ) is designed as a quick change system. Motor vehicle ( 1 ) according to claim 20, characterized in that the quick-change system a lift truck for equipping the ground tunnel ( 4 ) with the assembly of the container carrier ( 6 ) and the container ( 5 ) together with the floor element ( 7 ) from the motor vehicle underside. Method for operating a motor vehicle ( 1 ) according to claim 11 and / or 12, characterized in that the priority is defined in the control unit over a time sequence. Method for operating a motor vehicle ( 1 ) according to claim 11 and / or 12, characterized in that different priority intensities of the respective heating and / or cooling powers are defined by the priority. Motor vehicle ( 1 ) with a floor tunnel ( 4 ) in the form of a center tunnel and at least one container ( 5 ) for receiving electrical storage elements, operating materials and / or energy media, in particular according to claim 1, characterized in that - a front axle ( 22 ) of the motor vehicle ( 1 ) a first, from an electric motor ( 24 ) and a transmission ( 26 ) formed drive set, and - a rear axle ( 23 ) of the motor vehicle ( 1 ) a second, from an electric motor ( 25 ) and a transmission ( 27 ) formed drive set is assigned, - the drive sets are designed to be identical. Motor vehicle ( 1 ) according to claim 24, characterized in that the electric motor ( 24 . 25 ) in the direction of travel of the motor vehicle ( 1 ) seen in front of the front axle ( 22 ) / Rear axle ( 23 ) is arranged running. Motor vehicle ( 1 ) according to claim 24 or 25, characterized in that the at least one container ( 5 ) seen in the vehicle longitudinal direction between the gears ( 26 . 27 ) of the two drive sets is arranged. Motor vehicle ( 1 ) according to any one of claims 24 to 26, characterized in that on one of the respective electric motor ( 24 . 25 ) opposite side of the associated transmission ( 26 . 27 ) a power electronics ( 29 . 30 ) is arranged.