DE102011001481A9 - Powertrain module, assembly method and motor vehicle - Google Patents

Abstract

The invention relates to a retrofittable electric drive train module (1) for a motor vehicle, with two motor units (2, 3) arranged next to one another, each comprising at least one electric motor (4, 5), each motor unit (2, 3) having a drive shaft each Shaft (6, 7) can be operatively connected to a wheel to be driven and a transmission gear (8, 9), preferably designed as a planetary gear, is arranged between each motor unit (2, 3) and the associated shaft (6, 7), and wherein the Motor units (2, 3) are fixed to a support structure (10) which can be fixed on the motor vehicle body, the electric motors (4, 5) being assigned a common control housing (20) which forms part of the drive train module (1) and wherein the control housing (20) is designed to be electromagnetic shielding, in particular made of metal.

Description

The invention relates to a retrofittable electric powertrain module for a motor vehicle according to claim 1 and to a motor vehicle, comprising such a powertrain module according to claim 16.

Various fully or partially electric drives for motor vehicles are known. Usually these drives are installed directly in the production of the motor vehicle in the factory in the engine compartment. Hybrid drives are widespread, which in addition to the electric motor include a gasoline or diesel engine, the electric motors are partially formed as arranged directly on the wheels hub motors.

All previously known solutions are relatively expensive and therefore only accessible to a limited circle of customers.

Based on the aforementioned prior art, the present invention seeks to provide an electric drive concept or an electric drive train with which in a simple and cost-effective manner electric motor driven vehicles can be provided. Furthermore, the object is to provide an assembly method for such a drive beach and a motor vehicle with such a drive train.

This object is achieved in terms of the drive train with the features of claim 1 and in terms of the motor vehicle with the features of claim 16. Advantageous developments of the invention are specified in the subclaims. All combinations of at least two features disclosed in the description, the claims and / or the figures fall within the scope of the invention. In order to avoid repetition, features disclosed in accordance with the device should also be regarded as disclosed according to the method and be able to be claimed. Likewise, according to the method disclosed features should be considered as device disclosed and claimed claimable.

The invention has recognized that the claim thinking promoted by the automobile industry among consumers to achieve similar ranges with an electric automobile as with an internal combustion engine automobile is problematic or complicates or delays the implementation of electric drive concepts. The invention has also recognized that a main requirement or field of application of electric motor-driven motor vehicles is the short-distance traffic, in particular the path between place of residence and workplace. In particular, to enable such short-distance trips by means of an electric motor, simply constructed drive, the drive train according to the invention is proposed. This is untypically a retrofit module, which is designed in particular to be used in initially delivered with internal combustion engine motor vehicles. This approach is so far revolutionary that can be used on the already provided in a modern motor vehicle safety technology and that a new design is unnecessary. The designed according to the concept of the invention electric drive train module can be installed after removal of the engine and the transmission in a vehicle body and thereby does not affect safety-related fixtures, such as brakes, ABS, etc.

The drive train module according to the invention is characterized by two motor units, which each include at least one, preferably only one, electric motors. Preferably, the electric motors are synchronous motors. Even more preferably, the electric motors are arranged such that their motor shafts are oriented in the installed state perpendicular to the longitudinal extent of the motor vehicle, wherein the electric motors of the two motor units are operable at mutually different speeds. The drive concept is based on the idea of assigning each driven wheel its own motor unit, which, in contrast to wheel hub motors, however, is not arranged directly on the wheel, which reduces problems with accelerated masses but with distance to the wheels. The operative connection of the motor units to the wheels to be driven is realized via a respective propeller shaft, in particular a so-called half-shaft, which preferably has two articulation points. Here, between the respective motor unit and the associated shaft according to the invention one, in particular designed as planetary gear, transmission gear (in particular reduction gear), in particular with a gear ratio i from a value range between 2 and 15, preferably between 5 and 10, most preferably of 7. Das Providing the transmission allows the use of relatively inexpensive consumer motors, which are characterized by a high speed and a relatively low torque. Furthermore, the drive train module comprises a support structure on which directly or indirectly the motor units and thus the transmission are fixed with associated waves. After removal of the internal combustion engine and the associated transmission, the drive train module designed according to the concept of the invention can be inserted in an existing motor vehicle in a comparatively simple manner and fixed there by means of the supporting structure on the body and over the waves are connected to the wheels to be driven.

For the installation are particularly small vehicles, with which the distance home-work is sufficiently comfortable zurücklegbar. Even small battery capacities are usually sufficient to be able to supply the trained according to the concept of the invention powertrain module with electrical energy. A recharging of the batteries can be done, for example, at the workplace, especially if there are means for electrical energy production, such as a solar cell system and / or a hydroelectric power plant, etc. are provided. By using the drive train according to the invention, the CO ₂ emission can be reduced.

According to the invention, it is advantageously provided that a component of the drive train module is a control, comprising a control housing, wherein the integration of the control into the drive train module can eliminate costly and long electrical wiring, as is the case with conventional electric vehicles beneficial effect on the electromagnetic compatibility (EMC) of the drive train.

It is essential that the control housing of the control is designed to be electromagnetically shielding in order to further improve the EMC. Most preferably, this is an at least partially, preferably mostly, even more preferably completely formed from metal housing.

With regard to the arrangement of the control housing relative to the motor units, there are different possibilities. It is essential that the control housing is arranged as close as possible to the electric motor units in order to avoid as much as possible between the control housing and the electric motor housings running electrical lines. The fact that free (ie not enclosed) between the control and the electric motors running, shielded electrical lines can be omitted, which connect the motor terminal box with the control in the prior art, not only the EMC is improved, but in addition copper can be saved , which leads directly to the reduced material costs, but also to a reduced weight. In addition, the assembly effort and the line length-dependent voltage drop is significantly reduced. In this case, an embodiment in which the control housing is seated on terminal boxes of the electric motors is very particularly preferred - optionally under the interposition of one, in particular elastic, material, which may preferably assume a damping and / or sealing function. Alternatively, it is conceivable to directly adjoin the control housing to the electric motor housing or to let it sit on this. It is also possible to arrange the control housing on a support, preferably set, which is preferably fixed to the electric motor housing and / or seated on this.

To further optimize the EMC is provided in a further development of the invention advantageously that the leads for contacting the electric motor windings, in particular for contacting stator windings are not electrically contacted in terminal boxes of the electric motors, but within the control housing, which thus the function of the actual or original terminal boxes takes over. The possibly still existing terminal boxes of the electric motors thus lose their original function and can be omitted if necessary, preferably when the control housing is seated directly on the electric motor housings or a carrier arranged on these. In order to ensure this, the connection lines, preferably without thereby overcoming a housing-free route between the control housing and the electric motor housing, are guided into the control housing. Alternatively, if it is desired to dispense with separate connecting lines, the electric motor winding wires can also be guided directly out of the electric motor housings into the common control housing - again preferably without the bridging of a free distance. In the case of the direct arrangement of the control housing on the electric motor housings, the connecting wires or the winding wires may be fed directly. In the case of the preferred arrangement of the common control housing on the terminal boxes, the connecting lines or the winding wires are preferably passed through the respective terminal box in the control unit housing, wherein the terminal boxes bridge the distance between the control housing and the electric motors.

Very particular preference is given to a variant in which the controller is assigned a fluid cooler (heat exchanger for removing the waste heat of the controller), which preferably flows through or can flow through cooling water. In order to obtain the most compact drive module, it is expedient to arrange this fluid cooler for the control within the control housing.

In particular, in order largely to be able to rely on standard building units, it is preferred if the control comprises a separate control unit for each motor unit. Overall, therefore, according to the embodiment of the invention, two in Sum the control units forming control provided.

These are preferably located within the control housing, u. a. to reduce the EMC. Most preferably, each control unit comprises a heat conduction plate, in particular made of aluminum (this is also understood as an aluminum alloy), which is contacted by the power semiconductor elements of the respective control thermally conductive.

It is particularly useful now, in particular to minimize the production cost and to achieve an extremely compact design, when the heat conducting plates of the control units are part of a heat sink of the fluid cooler. In other words, the heat conducting plates of the control units form walls or at least wall sections of the heat sink, that is, they can be flowed on or contacted directly with cooling fluid at the rear. On a separate from the heat conducting plates, provided with flow channels heatsink can thus be dispensed with advantage.

Particularly expedient is an arrangement of the heat conducting plates, in which these form two parallel side walls of the heat sink, wherein the heat sink is preferably centered on the width dimension of the drive train module and extends preferably perpendicular to an axis formed by the motor shafts of the motor units.

As already indicated, each heat plate is thermally conductive, directly or indirectly contacted by power semiconductor elements of the associated control unit, so that the resulting waste heat is optimally introduced into the heat conducting plate and from this directly on the, preferably conveyed in a cycle cooling fluid can be delivered. It is conceivable that the power semiconductor elements contact the respective heat conducting plate directly, d. H. abut on this. However, it is especially expedient to ensure a constant heat transfer when a thermally conductive adhesive, in particular thermal compound, is arranged between the power semiconductor components and the heat-conducting plate.

It is particularly expedient if the power semiconductor elements are arranged on a printed circuit board of the respective control unit, wherein this printed circuit board is located in a housing of the control unit, wherein the housing is formed on the fluid cooler side of the heat conducting plate. Preferably, the housing is formed in a region of the heat-conducting opposite plastic. Particularly preferably, this housing, preferably on a side remote from the heat conducting plate side carries terminals for connecting connecting lines for contacting the electric motor windings or for direct connection of the electric motor winding wires. Such an embodiment is particularly preferred if, as explained above, the original function of the terminal boxes and / or the terminal boxes as such is dispensed with. The contacting of the electric motor winding wires or the connecting wires for contacting the electric motor windings thus does not take place outside of the control housing, but in this, preferably to the disposed within the control housing housings of the control units.

It is particularly expedient if the housing of the control units alternatively or preferably in addition to the terminals for the electric motor winding wires terminals for connecting power supply lines, ie terminals for contacting the power supply network, which preferably as energy storage or energy source multiple battery assemblies (preferably each comprising several in Series connected batteries). In this case, preferably at least two, preferably in each case two connection contacts (plus and minus) having, terminals are provided on each control unit housing to connect to each Steuereinheizgehäuse at least two battery arrangements, which are connected in series or preferably in the control unit housing, preferably in front of the actual control electronics , This opens up the possibility in the motor vehicle outside the control unit housing only (low) voltage lines (power supply lines) to lead, each leading a battery assembly voltage of preferably below 50 V, in particular of about 48 V, so that the risk potential, especially in the event of a crash is significantly reduced. The actual motor operating voltage, in particular of 96 V, is achieved by the in-line switching of battery arrangements within the control housing, preferably on or in each control unit housing.

It is particularly expedient if, in addition to the fluid cooler for the control, at least one fluid cooler is provided for the electric motor units, the fluid cooler for the controller and the at least one fluid cooler for the electric motor units preferably not being connected in series but are arranged parallel to each other. Although an array in series theoretically conceivable, however, heat peaks occur both in the electric motor units and in the control usually at the same time, so that in this case the coming heat exchanger used and the fluid line system should be sized correspondingly larger to the cooling fluid sufficiently cool down accordingly. The at least one fluid cooler for the electric motor units is preferably a line system received in the motor housing for absorbing waste heat from the electric motor units. Preferably, a separate fluid cooler is provided for each motor unit, wherein the fluid cooler of the electric motor units can be connected in series or alternatively, which is preferably hydraulically parallel.

Preferably, the discharges of the fluid cooler for the controller and the at least one fluid cooler for the electric motor units in or in front of a motor vehicle heat exchanger, at which the absorbed waste heat, preferably via the airstream can be discharged. The motor vehicle heat exchanger is preferably a heat exchanger which is fitted as standard in the motor vehicle, it being preferred to remove a fan (fan) which is generally present, ie. H. to form the heat exchanger fan-free, thus saving weight. An electric motor operated fan is not required because in slow driving or at a standstill usually only a small amount of waste heat is expected (in contrast to the internal combustion engine).

It is particularly expedient if the heat-conducting plates rest on the frame (support frame) via a respective ring seal or are braced against it. Here, the tightness of the heat sink formed by the frame and the heat conducting plates is ensured. If necessary, can be dispensed with feasible sealing grooves for receiving the ring seals, since the coolant system works preferably only with low delivery pressure. Boiling temperatures of the coolant, in particular of cooling water, preferably can not be achieved.

Particularly useful is an embodiment in which the controller is designed as a torque control unit for controlling and / or regulating the electric motor torques. In this way, it is ensured that the electric motors, which are preferably designed as synchronous motors, automatically adjust or adjust with respect to the rotational speed to the required rotational speed, in particular when cornering. Preferably, the torque control takes place as a function of the gas and / or brake pedal position, d. H. the driver specifies the torque requested by the controller. In the case of the design of the controller as a torque control unit, the drive train module designed according to the concept of the invention can also be referred to as an electrical differential, with which slippage of the drive wheels can be largely avoided. Preferably, the control is designed such that it endeavors that both motor units deliver the same torque. Here, the electric motor units can be operated at different speed. By such a design of the control, an anti-slip function is realized in a surprisingly simple manner, which has been implemented in internal combustion engine vehicles so far only by a complex traction control, usually by braking intervention.

In a further development of the invention is advantageously provided that in a region between the electric motor units, a very particularly preferably electromagnetic and / or permanent magnetic machining brake, preferably a parking brake or driving assistant brake, preferably an electric clutch, is arranged. This is formed in a development of the invention such that with this the motor shafts of the electric motor units can be coupled with a fixed disc to block the electric motor units at a standstill and / or to support the braking effect and / or what is preferred when braking electrical energy generate, which is fed into the power grid of the motor vehicle. The brake may also be designed as a driving assistant brake, which is preferably controlled by the controller for the electric motor units, in particular such that an unintentional rolling back and / or a jerky start is avoided. The brake intervenes, in particular as a function of control signals of the control, according to the driving behavior, by adjusting the braking force provided to the respective driving situation.

The brake can, in particular if it is designed as a parking brake, be designed such that a preferably magnetically generated locking force, in particular after a predetermined time, is supported by a mechanical spring force actuator or that the locking force, especially after a predetermined time, completely by a spring force actuator provided. In a further development of the invention is advantageously provided that the release of a locking mechanism of the brake by means of electromagnetism in train / printing operation, where it is also conceivable, in particular alternatively the brake, in particular to drive the parking brake with at least one electromotive actuator.

It is particularly expedient if a braking state, in particular a static holding torque with which the brake holds the motor shaft is canceled by an electromagnetic pulse of the controller, which is preferably output in connection or at the time of activation of the motor units. This can be dispensed with, at least partially, the previously required simultaneous manual management of handbrake, clutch and accelerator pedal.

In a further development of the invention is advantageously provided that the support structure means for fixing the drive train module, preferably on the spring domes, in particular in the engine compartment, has. In this case, the means may be formed, for example, as a cross arm with end annular flanges for resting on the spring domes. It is particularly expedient if the drive beach module is additionally fixed in a lower region on the vehicle body in order to prevent a pivoting of the drive train module during acceleration or Bremsdrehmkraftkraftbeaufschlagung.

An embodiment is particularly preferred in which an energy separating device is arranged on the control housing, preferably on the outside of the control housing, in order to connect the drive module to the energy supply network of the motor vehicle or to decouple the drive module from the energy supply network. Preferably, the energy separating device comprises at least one socket and / or at least one plug which can be connected to a corresponding counter element (plug or socket) of the power supply network. Advantageously, the energy separator is arranged freely accessible and is self-explanatory even to the layman due to the plug configuration. Particularly preferred is a gripping possibility for actuating the energy separator in the grille region of the motor vehicle. It is particularly expedient if the energy separating device is arranged on an upper side of the control unit housing. Preferably means for mechanical fixation of the plug or the socket of the power supply network are provided on the corresponding opposite (socket or plug) of the drive train module to prevent inadvertent release of the energy connection safely.

It is very particularly preferred if the energy firing device has a plurality of sockets / connector pairs, preferably at least one, preferably exclusively one sockets / connector pair, for each control unit or for each motor unit. It is also conceivable to assign an energy separator to each battery assembly or group of battery assemblies.

Preferably, the energy burning device is designed such that with this power supply lines and these battery assemblies to the control housing can be connected, each leading to a maximum voltage of less than 50 V, wherein the in-series switching to achieve the motor operating voltage, as explained above, preferably within of the control housing takes place. It is conceivable to provide a separate plug / socket pair for each battery arrangement with a maximum operating voltage of less than 50 V.

Another advantage of the energy separator is that in the event of an accident, the fire department or helper can immediately interrupt the circuit safely, the energy separator or its function is self-explanatory.

Very particular preference is given to a variant in which at least two batteries or at least two battery arrangements, in particular series-connected batteries, are connected in series within the control housing. In other words, in a further development of the invention, the connecting cables for the at least two batteries or battery assemblies, preferably via the aforementioned energy separation unit, led to or in the control unit housing and are added voltage in the interior only by series connection, in this way, high-voltage motors, such as 600 V. To use motors without it would be necessary to run high-voltage cables through the entire vehicle, which can lead to a risk to persons especially in the event of a crash. In particular, the operating voltage of preferably two electric motors used is, in each case, at least approximately 96 V, so that a series circuit of two battery arrangements is possible for operating each electric motor, each having an operating voltage of 48 V. By encapsulated construction of the module so high-voltage motors can be safely used when the voltage addition (series connection) is realized only within the common control housing, which is located in close proximity to the motor units. The batteries or battery arrangements connected in series within the control housing are preferably distributed over the motor vehicle.

As already explained, the series connection of at least two battery arrangements to and / or in the control unit housings of the control units arranged within the control housing takes place. Very particularly preferred is a development of the drive module, in which this, in particular for lying mounting a mounting frame is assigned as part of the support structure, wherein the mounting frame for fixing the drive module is used directly or indirectly to the vehicle body. Especially useful is when the mounting frame circumferentially closed, preferably rectangular in cross section is contoured. If required, the mounting frame can cooperate with the previously explained means for fixing the drive train module to the spring domes, in particular in the at least one Cross arm with end-side annular flanges is fixed to the mounting frame.

The mounting frame may form part of the control housing, in particular side walls of this and / or the control housing may be fixed thereto. It is also conceivable that the mounting frame carries the control housing only indirectly via the motor units.

Preferably, the mounting frame is laterally penetrated by the gear housings of the gear preferably designed as a planetary gear, wherein the mounting frame is preferably fixed to the gear housings and / or to the motor unit housing.

In a further development of the invention is advantageously provided that means, in particular a transverse arm with end-side annular flanges, are provided for fixing the drive train module to the spring domes.

In a further development of the invention is advantageously provided that between the electric motor units one, in particular electromagnetic and / or permanent magnetic, brake, preferably a parking brake and / or a driving assistant brake is arranged, which sits on motor shafts or motor shaft extensions of the electric motor units.

In a further development of the invention is advantageously provided that the brake is designed as a generator for generating electrical energy and that the energy can be fed into a power grid of the motor vehicle.

In a further development of the invention is advantageously provided that the brake can be controlled via the controller.

In a further development of the invention is advantageously provided that in particular outside, on the control housing an energy separator for connecting and disconnecting the drive train module is provided to or from the power grid of the motor vehicle.

In a further development of the invention it is advantageously provided that within the control housing, preferably within control unit housings, at least two batteries arranged outside the control housing or at least two battery arrangements, each comprising a plurality of batteries, are electrically connected in series.

In a further development of the invention is advantageously provided that the control housing is fixed to a, preferably circumferentially closed, mounting frame of the support structure and / or formed in sections thereof.

In a further development of the invention is advantageously provided that the mounting frame is penetrated by the gear housing and / or, in particular laterally fixed to the motor unit housings and / or to the gear housings.

• • Demontage des Verbrennungsmotors sowie des Getriebes,
• • Einbau des Antriebsstrangmoduls durch Festlegen an der Fahrzeugkarosserie,
• • Verbinden der Wellen mit den Rädern, und
• • elektrisches Kontaktieren des Antriebsstrangmoduls mit einem Energieanschluss mindestens einer Batterieanordnung, vorzugsweise von mehreren Batterieanordnungen.

The invention also leads to an assembly method for assembling a drive train module which is designed according to the concept of the invention in a motor vehicle initially having an internal combustion engine. The method is characterized by the steps:

• Dismantling the internal combustion engine and the transmission,
• • Installation of the powertrain module by fixing to the vehicle body,
• • Connecting the shafts to the wheels, and
• Electrically contacting the powertrain module with an energy port of at least one battery assembly, preferably of multiple battery assemblies.

Furthermore, the invention leads to a vehicle comprising a drive train module designed according to the concept of the invention. It is preferably a motor vehicle in which the drive train module has been retrofitted.

In this case, the drive train module can be designed and arranged as a front-drive module or as a rear-drive module.

It is particularly expedient if the fluid cooler for the controller and the at least one fluid cooler for the electric motor units are connected to a common, preferably fan-free, vehicle heat exchanger.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and with reference to the figures.

These show in:

1 a perspective view of a drive train module, wherein the end-side joints of the propeller shafts for connecting the propeller shafts to the wheels are not shown for clarity,

2 a further perspective view of the powertrain module according to 1 , Wherein a support structure is to be recognized, which comprises substantially two of the transmissions interspersed, extending in the vertical direction support plates on which the motor units are fixed, wherein the support plates in the Area of its upper end are fixed to a two support tubes comprising transverse arm having end-side annular flanges for fixing the drive module to spring domes. Evident is in the lower part of the support plates a torque arm for fixing the drive module in the region of its lower end to the vehicle body,

3 to 6 a total of four rudimentary representations of the drive module according to the 1 and 2 with its two motor units, each comprising an electric motor, which are each connected to a drive shaft via a transmission gear designed as a planetary gear,

7 a further perspective view of a drive module with the above the motor units arranged control housing, in which directly the connection cables for the motor windings or alternatively directly out the motor winding wires,

8th a drive module with an alternative transverse arm, comprising only a single carrier tube,

9 an alternative embodiment of a powertrain module having disposed on an upper side of the control housing energy separator, which comprises a first connector which is connectable to a second connector. Evident is a mechanical fixing possibility for mechanical fixing together of the two connectors. The second connector sits at the end on connection cables for the power supply network. In a particularly preferred embodiment, a plurality of battery assemblies are connected separately from one another, ie, electrically isolated from one another, and connected in series within the control housing, with one and the same connector,

10 a representation of the drive module with the control unit housing removed, wherein the terminal boxes of the motor units can be seen on which the control housing is seated in the mounted state. The six holes for the implementation of the connection cables for the stator windings can be seen,

11 a view of the drive module with the control housing removed, where the fixed to a support frame heat conducting plates of the control units can be seen. The cooling connection on the support frame for active, rear-side cooling of the control units can also be recognized.

12 a representation of a powertrain module with a circumferentially closed mounting frame, which serves as shown for horizontal assembly of the powertrain module in a motor vehicle and which can be connected for an upright assembly with means for fixing the powertrain module to the spring domes, as shown in part in the preceding figures,

13 a schematic exploded view of the fluid cooler for the two control units of the controller, and

14 a schematic representation of the front of a control unit housing with connections for connecting a plurality of battery assemblies and for connecting winding wires.

In the figures, like elements and elements having the same function are denoted by the same reference numerals. The features and feature combinations shown in different embodiments should be considered as being combined with each other.

In 1 is a possible embodiment of a retrofit electric drive train module 1 represented for a motor vehicle. This includes two juxtaposed motor units 2 . 3 , with in this embodiment in each case a single electric motor 4 . 5 , At the electric motors 4 . 5 this is an electric motor that can be operated at an operating voltage of 96V. Each motor unit 2 . 3 is designed as a propeller shaft shaft 6 . 7 assigned, wherein the integral connection means (eg flange) for fixing to the vehicle and an end-side joint for reasons of clarity are not shown. Between every wave 6 . 7 and the associated electric motor 4 . 5 or the associated motor unit 2 . 3 is a transmission gear 8th . 9 arranged, with the transmission gear 8th . 9 are formed in the embodiment shown as a planetary gear with a transmission ratio i = 7. The motor units 2 . 3 are about the case of the transmission gear 8th . 9 on a supporting structure 10 set, which is on the vehicle body (not shown) can be fixed. The supporting structure 10 includes funds 11 for fixing the drive train module to spring domes in the motor vehicle. These funds 11 comprise in the embodiment shown two transverse arms 12 at the ends ring flanges 13 . 14 are provided to the powertrain module 1 to screw on the spring domes.

In the embodiment shown, the support structure comprises 10 two side support plates arranged parallel to one another 15 . 16 that of the translation gears 8th . 9 are interspersed laterally and with the housings of the up gear 8th . 9 are bolted. The support plates 15 . 16 are firmly connected with the means 11 , On one of the means 11 opposite side are formed as slots mounting holes 17 to set the powertrain module 1 on the vehicle body. The mounting holes 17 serve (in the specified state) as a torque lock. Furthermore, it can be seen that the electric motor housings 18 . 19 the motor units 2 . 3 a control housing formed of metal 20 sits in which the in 1 not shown control for the electric motors 4 . 5 or the motor units 2 . 3 is arranged. The control unit, not shown, includes control units to be explained later, for each motor unit 2 . 3 a separate control unit. The winding wires, not shown, of the electric motors 4 . 5 are not free between the electric motors 4 . 5 and laid the control, but directly from the electric motor housings 18 . 19 by not illustrated terminal boxes into the control housing 20 in which they are connected to the control units. In turn, not shown, distributed in the vehicle battery assemblies are connected to the control units, each battery preferably having an operating voltage of less than 50 V and in series to achieve the motor operating voltage within the control housing 20 he follows.

2 shows another perspective view of the embodiment according to 1 , The 3 to 6 show plausible representations of the embodiment according to the 1 and 2 , wherein schematically in 4 a trained as a parking brake 21 is shown, which acts simultaneously on both motor shafts, not shown, of the electric motors. The brake 21 is controlled by the controller, not shown. It is preferably an electromagnetic brake device, in particular a parking brake. Additionally or alternatively, to provide a brake, the electric motor units 2 . 3 , Preferably, the housing of the electric motors to be fixed to each other via connecting means, wherein the connecting means preferably between the electric motor units 2 . 3 are arranged.

7 again shows a perspective view of the embodiment according to the 1 to 6 ,

The embodiment of a retrofittable powertrain module 1 according to 8th differs from the preceding embodiments only by a modified embodiment of the means 11 for fixing the drive train module to the spring domes of a motor vehicle. There are the support plates 15 . 16 , which in the embodiment shown only a single, correspondingly viable designed cross arm 12 wear, which end with the ring flanges 13 . 14 is equipped for screwing with the spring dome.

From the illustration of an alternative powertrain module 1 according to 9 is one outside the control box 20 arranged energy separator 22 to recognize that for connecting power supply lines 23 of the power supply network is used. The energy separator 22 includes a fixed to the control housing 20 arranged socket 24 in the one plug 26 with the power supply lines contacted 23 is connectable. The energy separator 22 has locking means 27 for preventing inadvertent loosening. In the embodiment shown is a single energy separator 22 it is preferred that the energy connection lines 23 lead multiple wires, each leading electrical energy with an operating voltage of less than 50 volts. The Inreiheschaltung takes place within the control housing 20 , It is also conceivable for each battery arrangement or for groups for battery arrangements each to provide an energy separator.

10 shows a representation of the embodiment according to 8th by way of illustration the control housing 20 with controls and fluid cooler was removed. You can see the two motor units 2 . 3 , each one a terminal box 28 . 29 in which usually takes place the clamping of the winding wires. In the embodiment shown, the winding wires are from the electric motor housings 18 . 19 directly through the terminal boxes 28 . 29 through the control housing 20 guided. For this purpose are in cover plates 30 . 31 the terminal boxes 28 . 29 , which only have a passage function, no clamping function more appropriate openings 32 provided, which are formed in the embodiment shown within elastic material. The control housing 20 sits in the mounted state on this elastic material and thus on the cover plates 30 . 31 the terminal boxes 28 . 29 on.

11 shows a representation of the embodiment according to 10 with removed control housing but with schematically illustrated control 33 comprising two control units 34 . 35 , Further, a fluid cooler 36 for the controller 33 shown by heat conducting plates 37 . 38 the control units 34 . 35 is educated. The heat conducting plates 37 . 38 limit directly a heat sink flowing through the heat sink 39 and for this purpose are on a circumferentially closed frame 40 set in parallel orientation. Laterally in the frame 40 opens a fluid inlet 41 for connection of a fluid supply line. Likewise is an unillustrated fluid outlet for discharging the heated cooling fluid is provided (not shown).

The heat conducting plates 37 . 38 are part of the control unit housing or wear the controller and are on the back directly to the cooling fluid flows and on the of the frame 40 remote flat side of non-illustrated power semiconductor elements of the respective control unit contacted thermally conductive. In addition, a plastic housing, in particular a trough-like plastic housing part is enclosed as part of the housing to the power semiconductor components, which are arranged on a printed circuit board, on which terminals are provided for connecting power supply lines and winding wires.

In this context is on 13 referenced in which the fluid cooler 36 is shown schematically in an exploded view. To recognize is the centric frame 40 , on the side of the heat conducting plates 37 . 38 the control units 34 . 35 can be connected or screwed, possibly under the intermediate arrangement of a ring seal.

In the half of the drawing on the left you can see that the control units 34 . 35 (For clarity, only shown here in the left in the drawing plane control unit 34 ) a control unit housing 42 Include what is backward of a heat conduction plate 37 Made of aluminum, which is directly inside the frame 40 Fluid has flowed. On the heat conduction plate 37 sits a plastic tub 43 or plastic shell, which forms the legal housing and to which terminals for winding wires and power supply lines, in particular for connecting a plurality of battery arrangements are provided for in series circuit of the battery assemblies, within the respective control unit.

At the frame 40 it can be seen that next to the fluid inlet 41 a fluid outlet 44 is provided.

By way of example only, the heat-conducting plate is on the right in the drawing half 38 the control unit 35 shown without plastic tub. Shown are power semiconductor elements 45 using thermal grease on the heat conducting plate 38 contact thermally.

In 14 is only schematically one of the frame 40 facing away from the front 46 a control unit housing 42 shown. To recognize the two connections 47 , each comprising a positive pole and a negative pole for connecting in the embodiment shown two battery arrangements, which are connected in series in the control unit. There are also connections 48 provided for connecting the winding wires to the actual controller.

In 12 is another embodiment of a powertrain module 1 shown. Evident is a circumferentially closed mounting frame 49 for lying installation for connection of previously explained in connection with other embodiments means or for hanging on spring domes. The mounting frame 49 encloses a directly on the motor units 2 . 3 seated control housing 20 , which with two energy separators 22 is provided. The mounting frame 49 improves the EMC and at the same time serves as a guardian of protection for the entire motor electrics, in particular for the power electronics. To recognize is a connection 50 for connecting the control of the motor units.

LIST OF REFERENCE NUMBERS

1

Powertrain module

2

motor unit

3

motor unit

4

electric motor

5

electric motor

6

wave

7

wave

8th

up gear

9

up gear

10

supporting structure

11

medium

12

Transverse arm (s)

13

annular flange

14

annular flange

15

support plate

16

support plate

17

Mounting hole (torque lock)

18

Electric motor housing

19

Electric motor housing

20

control housing

21

brake

22

Energy separator

23

Power line

24

Rifle

26

plug

27

locking means

28

terminal box

29

terminal box

30

cover plate

31

cover plate

32

openings

33

control

34

control unit

35

control unit

36

Fluid Coolers

37

heat conduction

38

heat conduction

39

heatsink

40

frame

41

fluid inlet

42

Control unit housing

43

Plastic tub

44

fluid outlet

45

Power semiconductor elements

46

front

47

connections

48

connections

49

mounting frame

50

connection

Claims (17)

Retrofittable electric powertrain module ( 1 ) for a motor vehicle, with two juxtaposed motor units ( 2 . 3 ), each comprising at least one electric motor ( 4 . 5 ), each engine unit ( 2 . 3 ) via a respective shaft formed as a propeller shaft ( 6 . 7 ) is operatively connectable to a driven wheel and wherein between each motor unit ( 2 . 3 ) and the associated wave ( 6 . 7 ), preferably designed as a planetary gear, transmission gear ( 8th . 9 ), and wherein the motor units ( 2 . 3 ) on a supporting structure ( 10 ), which is fixed to the vehicle body, wherein the electric motors ( 4 . 5 ) a common control housing ( 20 ), which is a component of the powertrain module ( 1 ) and wherein the control housing ( 20 ) Electromagnetically shielding, in particular of metal, is formed. Drive train module according to claim 1, characterized in that the electric motors ( 4 . 5 ) each have a terminal box ( 28 . 29 ), and that the control housing ( 20 ) on the terminal boxes ( 28 . 29 ), optionally on a arranged on the terminal boxes, preferably elastic, material or alternatively on electric motor housings or on these arranged elastic material or on a carrier arranged on these sits. Drive train module according to claim 2, characterized in that connection lines for contacting the electric motor windings, in particular for contacting stator windings, or alternatively the electric motor winding wires from the electric motor housings in the common control housing ( 20 ) are guided and electrically connectable there to a power supply connection. Drive train module according to claim 3, characterized in that the connecting lines or the electric motor winding wires through the respective terminal box ( 28 . 29 ) or directly from the respective electric motor housing directly into the control housing ( 20 ) are guided. Drive train module according to one of the preceding claims, characterized in that, preferably within the control housing ( 20 ), a fluid cooler ( 36 ) for the controller ( 33 ) is provided. Drive train module according to claim 5, characterized in that the controller ( 33 ) two control units ( 34 . 35 ), each having a heat conducting plate ( 37 . 38 ), in particular of aluminum, which form part of a cooling body through which cooling fluid can flow ( 39 ) are. Drive train module according to claim 6, characterized in that the heat sink ( 39 ), preferably peripherally closed frame ( 40 ), on which, preferably arranged parallel to each other, heat conducting plates ( 37 . 38 ) and the heat sink ( 39 ) side, so that the cooling fluid directly the heat conducting plates ( 37 . 38 ) can flow. Drive train module according to one of claims 5 to 7, characterized in that each heat conducting plate ( 37 . 38 ) thermally conductive with power semiconductor elements ( 45 ) of the associated control unit ( 34 . 35 ), in particular by connecting between the power semiconductor elements ( 45 ) and the respective heat conducting plate ( 37 . 38 ) A heat-conductive adhesive, in particular Wärmeleitplaste is provided. Drive train module according to claim 5, characterized in that the controller ( 33 ) two control units ( 34 . 35 ), which comprise a common heat conducting plate, which is part of a cooling body through which cooling fluid can flow, wherein preferably the common heat conducting plate can be triggered directly with the cooling fluid. Drive train module according to one of claims 8 or 9, characterized in that the control units ( 34 . 35 ) each comprise a housing, which at the rear of the respective heat conducting plate ( 37 . 38 ) is formed and at the terminals ( 47 . 48 ) are provided for the connection lines for contacting the electric motor windings or directly for the electric motor winding wires. Drive train module according to claim 10, characterized in that connections ( 47 . 48 ) for connecting power supply lines ( 23 ) are provided within the control housing ( 20 ), preferably on or within the housing of the control units ( 34 . 35 ), connected in series. Drive train module according to one of claims 5 to 11, characterized in that the fluid cooler ( 36 ) for the controller ( 33 ) and at least one fluid cooler ( 36 ) for the electric motor units ( 2 . 3 ) are connected in parallel hydraulically. Drive train module according to claim 12, characterized in that the fluid cooler ( 36 ) for the controller ( 33 ) and the fluid cooler for the electric motor units ( 2 . 3 ) are connectable to a vehicle heat exchanger, which preferably has no fan. Drive train module according to one of the preceding claims, characterized in that the controller ( 33 ) as torque control for control ( 33 ) and / or regulation of the electric motor torques is formed. Drive train module according to one of the preceding claims, characterized in that the controller ( 33 ) is designed such that these on both motor units ( 2 . 3 ) is formed adjusting the same torque. Motor vehicle with a drive train module according to one of the preceding claims. Motor vehicle according to claim 16, characterized in that the fluid cooler ( 36 ) for the controller ( 33 ) and the fluid cooler ( 36 ) for the electric motor units ( 2 . 3 ) are connected to a, preferably fan-free, vehicle heat exchanger.

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