DE102021131863A1 - High voltage connector and powertrain for powering a hybrid or electric vehicle - Google Patents

Abstract

The invention relates to a high-voltage connection device (1) for connecting power electronics (105) to an electrical machine (102, 103), having:
- at least one first contact point (2) for contacting power electronics (105),
- At least one second contact point (3) for contacting an electrical machine (102, 103), and
- At least one electrically conductive element (4, 5, 6) for transmitting voltage and current from the at least one first contact point (2) to the at least one second contact point (3), so that at least one phase of power electronics (105) with at least one phase of an electrical machine (102, 103) can be electrically connected,
- The at least one electrically conductive element (4, 5, 6) being designed in such a way that an electrical conductor (106, 107, 108; 109, 110, 111) of power electronics ( 105) can be mechanically connected to an electrical conductor (112, 113, 114; 115, 116, 117) of an electrical machine (102, 103).
The invention also relates to a drive train (100) for driving a hybrid or electric vehicle with at least one high-voltage connection device (1).

Description

The invention relates to a high-voltage connection device for connecting power electronics to an electric machine and a drive train for driving a hybrid or electric vehicle.

From the DE 10 2019 122 805 a high-voltage connection device or a high-voltage (HV) terminal is known as part of a drive train.

The HV terminal/the high-voltage connection device is connected as an extra component to the wiring of an electrical machine by means of a screw connection or by means of a soldered or welded connection. The electric machine and the HV terminal are installed together as a unit in a transmission of the drive train and then, after the installation of power electronics, they are contacted with the electric machine by means of a screw or plug connection.

In this known configuration from the prior art, there are various electrical interfaces between the electrical machine and the power electronics up to the final contacting with the power electronics.

Thus there is an electrical contact between a winding of an electrical machine and a busbar of the electrical machine.

Another electrical contact is necessary to connect the power rail of the electrical machine to the HV terminal/high-voltage connection device.

And yet another electrical contact results from the contacting of the HV terminal / the high-voltage connection device with busbars of the power electronics.

Each of the three interfaces causes losses that also affect the electrical efficiency of a drive or a drive train.

In addition, the busbars or electrical conductors overmolded with plastic in the HV terminal are thermally insulated, which can lead to thermal problems in the HV terminal but also affect the efficiency of the drive train.

In addition, e.g. B. an integrated HV terminal / a high-voltage connection device on the electrical machine due to the rigidity of the wiring leading to the power lines or electrical conductors assembly, which increases the assembly effort. The reason lies in the difficulty of exactly maintaining the position of the HV terminal/the high-voltage connection device to the electric machine or to the interface of the electric machine of the drive train.

It is therefore an object of the present invention to specify a high-voltage connection device for connecting power electronics to an electric machine and a drive train for driving a hybrid or electric vehicle, which can be produced inexpensively and requires little assembly and is easy to assemble or simplifies the assembly process and also thermal can resolve inadequacies.

This object is solved by the features of the independent patent claims. Further advantageous developments are the subject matter of the dependent claims.

In a first aspect of the present invention, a high-voltage connection device for connecting power electronics to an electrical machine comprises at least one first contact point for contacting power electronics and at least one second contact point for contacting an electrical machine.

Said power electronics of a drive train can be arranged in a first housing space of a drive train.

Furthermore, said electrical machine can be arranged in a second housing space of a drive train.

Furthermore, the high-voltage connection device has at least one electrically conductive element for transmitting voltage and current from the at least one first contact point to the at least one second contact point. As a result, at least one phase of power electronics can be electrically connected to at least one phase of an electrical machine.

In addition, the at least one electrically conductive element is designed such that using a single fastener such. B. a screw or a rivet, an electrical conductor of power electronics with an electrical conductor of an electrical machine is mechanically connected. With the aid of the high-voltage connection device presented and with the aid of a single fastening means, it is thus possible to connect power electronics to an electrical machine in one assembly process. Strictly speaking, using the high-voltage connection device Device and by means of a single fastener, a phase of power electronics can be connected to a phase of an electrical machine. The assembly effort can thus be reduced in comparison to solutions from the prior art. In other words, the high-voltage connection device can simplify the assembly process or is designed to require little assembly and is easy to assemble.

Each electrically conductive element can be similar in shape to a socket or designed as a general hollow cylinder, so that a fastener can be passed through the at least one electrically conductive element in order to connect the high-voltage connection device on the one hand to an electrical conductor of power electronics and on the other hand to an electrical conductor to be mechanically connected to an electrical machine.

Furthermore, each electrically conductive element can have a first and a second end, with the first and/or second end forming an end face.

Each electrically conductive element can also form the at least one first contact point at its first end and the at least one second contact point at its second end.

A plurality of first and/or a plurality of second contact points can be arranged in series and next to one another. The arrangement in series and next to each other simplifies the contacting of the high-voltage connection device. In addition, z. B. three phases of power electronics can be connected to an electrical machine.

Each electrically conductive element may comprise copper or a low electrical resistance material. This ensures low-loss electrical conduction with the at least one electrically conductive element.

The high-voltage connection device can each have three contact points as phase connections for connecting power electronics and an electrical machine.

In this case, the at least one first contact point can serve or be designed as a phase connection and for contacting power electronics.

The at least one second contact point can also serve or be designed as a phase connection and for contacting an electrical machine.

Furthermore, the at least one first and/or the at least one second contact point can be designed as a flat section for easy contacting.

At a first end of the electrically conductive elements, the planar sections of the first contact points can be oriented in the same direction as a first plane or can be arranged in a first plane.

At a second end of the electrically conductive elements, the planar sections of the second contact points can be oriented in the same direction to a second plane or can be arranged in a second plane.

In this case, the first and second planes can be oriented in the same way to one another, for example parallel.

Furthermore, the high-voltage connection device can comprise a housing which insulates the electrically conductive elements from one another, positions them spatially relative to one another and/or connects them to one another to form a component, as a result of which assembly and handling can be simplified.

In addition, the housing can partially enclose the electrically conductive elements, in which case the electrically conductive elements can be cast into the housing of the high-voltage connection device.

The housing can have a first section for mounting in a first housing space of a powertrain for driving a hybrid or electric vehicle.

The first subsection can be designed in such a way that the at least one first contact point, or for example a first end of the at least one electrically conductive element, is free of housing material in order to achieve effective electrical contact with power electronics.

The first section can have a cuboid shape. This is easy to produce, z. B. in an injection molding process.

Furthermore, the first section can include separating elements in order to ensure the clearance and creepage distances between first contact points and thus between electrical conductors of power electronics of a drive train.

The separating elements can protrude from a flat surface of the first section.

Furthermore, the separating elements can be designed similar to a separating wall or similar to a separating web, so that a receiving area is formed for each first contact point, which causes a spatial delimitation of first contact points from one another. In this way, clearance and creepage distances can be increased and a short circuit can be prevented.

Furthermore, the housing can have a second section for attachment in a transmission housing and for attachment in a second housing space of a drive train for driving a hybrid or electric vehicle.

The second section can be designed such that the at least one second contact point, or for example a second end of the at least one electrically conductive element, is free of housing material in order to achieve effective electrical contact with an electrical machine.

The second section of the housing can also be designed in such a way that the second section forms a guide for the correct and/or clear positioning of the high-voltage connection device on a transmission housing of a drive train.

Furthermore, the second section can form a separate housing area for each electrically conductive element, which follows the shape of the at least one electrically conductive element, so that the separate housing areas for each electrically conductive element are spatially spaced from one another and are only connected to one another via the first section of the housing . As a result, each electrically conductive element in the second section can be surrounded or encased individually by the housing of the second section. A guide for the correct and/or clear positioning of the high-voltage connection device on a transmission housing of a drive train can also be implemented with the aid of the separate housing areas.

Furthermore, the second section for each electrically conductive element can be designed in the form of a socket or as a general hollow cylinder.

The second section can have three separate housing areas that are reminiscent of the contact pins of a mains plug.

Furthermore, it is possible that the second section forms a common or a single, coherent housing area for all electrically conductive elements, which is designed as a general cylinder, and z. B. can have an oval basic shape. As a result, the second section can be formed by a single housing area, which surrounds or encases all the electrically conductive elements together. A guide for the correct and/or clear positioning of the high-voltage connection device on a transmission housing of a drive train can also be implemented with the aid of the housing area.

The second sub-section can be modeled jointly for all electrically conductive elements in the form of a general cylinder on a counterpart that fits precisely into a slot with a specific depth.

Furthermore, the dimensions and dimensions of the first and second sections can be designed such that the first section forms a shoulder with which the first section can be abutted against a transmission housing of a drive train and thus positioned on the transmission housing.

The first and second sections or the high-voltage connection device or their housing can have a T-shape in a cross section along the at least one electrically conductive element. It is precisely this shape that realizes a shoulder with which the first partial section can be struck against a transmission housing of a drive train and thus positioned on the transmission housing.

The housing can comprise a non-electrically conductive material, in particular a plastic. Insulation from a transmission housing can thus be created.

In addition, the second subsection can comprise at least one circumferential groove per electrically conductive element or for all electrically conductive elements together for receiving a sealing element, with which two housing spaces of a drive train for driving a hybrid or electric vehicle can be sealed from one another.

Furthermore, the high-voltage connection device can include at least one sealing element.

The at least one sealing element can be arranged on a second section of a housing of the high-voltage connection device in order to seal off two housing spaces of a transmission housing of a drive train from one another.

In this case, the at least one sealing element can be arranged in a groove of a second section of a housing of the high-voltage connection device, so that two housing spaces are one Transmission housing of a drive train for driving a hybrid or electric vehicle can be sealed against one another.

The high-voltage connection device can be produced inexpensively on the basis of the configurations presented above with regard to the housing.

A second aspect of the present invention includes a powertrain for propelling a hybrid or electric vehicle.

It is expressly pointed out that the features of the high-voltage connection device, as mentioned under the first aspect, can be used individually or in combination with one another in the drive train.

In other words, the features mentioned above under the first aspect of the invention relating to the high-voltage connection device can also be combined here with further features under the second aspect of the invention.

According to the second aspect, the drive train for driving a hybrid or electric vehicle includes a transmission housing with a first housing space, for example a drying space, and a second housing space, for example a fluid space.

Furthermore, the drive train includes at least one electric machine, which is arranged within the second housing space of the transmission housing. The second housing space can be a space in which oil is present for cooling and/or lubrication.

In addition, the drive train has at least one high-voltage connection device according to the first aspect, arranged on the transmission housing.

The transmission housing can comprise at least one connecting passage, which connects the first and the second housing chamber to one another in a fluid-communicating manner.

In addition, one or a single high-voltage connection device can be arranged in at least one connecting passage, so that at least one sealing element of the high-voltage connection device, which seals against the transmission housing and rests in a groove of the housing of the high-voltage connection device.

Additionally or alternatively, one or a single high-voltage connection device can be arranged in the at least one connection passage, so that the at least one connection passage is sealed in a fluid-tight manner with the aid of the high-voltage connection device or with the aid of its housing.

Furthermore, the at least one connecting passage can be geometrically adapted to the high-voltage connection device, so that two housing spaces of the transmission housing can be separated from one another or sealed against one another.

The at least one connecting passage can be geometrically adapted to a second section of a housing of the high-voltage connection device, so that the at least one sealing element of the high-voltage connection device seals two housing spaces of the transmission housing from one another.

In this case, the connecting passage or the transmission housing can be designed to be geometrically complementary to the housing or to the second partial section of the housing of the high-voltage connection device. Shown in more concrete terms, the connecting passage can be designed in a manner similar to an elongated hole. It is also possible for the connecting passage to have three individual holes or bores, to which a second housing area of the second section of the housing of the high-voltage connection device is matched.

Furthermore, the drive train can include power electronics, which supplies the at least one electrical machine with voltage and current.

The power electronics can have at least one electrical conductor per electrical machine.

The at least one electrical conductor can be arranged at a first contact point of the high-voltage connection device. The at least one electrical conductor and the high-voltage connection device are thus electrically connected to one another.

The at least one electrical machine can have at least one electrical conductor, which is arranged at a second contact point of the high-voltage connection device. The at least one electrical machine and the high-voltage connection device are thus electrically connected to one another.

Each electrical machine can include three electrical conductors, which current and voltage from the high-voltage connection device or from the at least one second contact point is transmitted to a rotor and/or to a stator of the electric machine.

Each electrical conductor of an electrical machine can have a socket, or one end of an electrical conductor can have a through hole, onto which a socket is pressed or arranged in a materially bonded manner.

The socket can be threaded, e.g. B. have an internal thread. This allows the socket to be contacted by a screw.

To realize a three-phase AC voltage, a first, second and third electrically conductive element can each form a phase for supplying electrical energy to an electrical machine.

In this case, an electrical conductor of the power electronics, the high-voltage connection device and an electrical conductor of an electrical machine can be mechanically connected to one another by means of a single fastening means.

As already indicated, the fastening means can be designed as a screw.

Furthermore, the fastening means can clamp an electrical conductor of the power electronics against a first contact point of an electrically conductive element of the high-voltage connection device and an electrical conductor of an electrical machine against a second contact point of the electrically conductive element of the high-voltage connection device, so that an electrical contact can be established. Since only one or only a single fastener has to be used to connect a phase of the power electronics and an electrical machine using the high-voltage connecting device, the assembly effort can be simplified.

The fastening means can have an electrically conductive or an electrically insulating material.

In addition, the drive train can include a gearbox, which can be arranged in the gearbox housing.

In the following, the inventive idea presented above is expressed again and additionally in other words.

In simplified terms, this idea relates to a high-voltage (HV) terminal or a high-voltage connection device for an electrified or electric or hybrid drive/drive train, for example for a two-electric machine transmission or for a hybrid module or a E-axle or to drive a hybrid or electric vehicle.

In this way, direct electrical contacting can be implemented by means of sockets integrated in the HV terminal/by means of sockets integrated in the high-voltage connection device between busbars/electrical conductors of power electronics and busbars/electrical conductors of electrical machines.

Furthermore, a high-voltage terminal/a high-voltage connection device can have a terminal carrier or a housing as well as a socket and a seal for each electrical phase.

The terminal support or the housing can be a non-electrically conductive material, such as. B. plastic have.

Furthermore, the sockets integrated in the carrier/housing can represent an electrical interface between power electronics of a drive train and busbars or electrical conductors of an electrical machine. In this case, the sockets can have a material with a lower electrical resistance, such as a copper alloy.

An integrated seal on the carrier/housing can seal a space/first housing space for the high-voltage contact of an oil space/second housing space in a transmission housing of the drive train.

In addition, the HV terminal / the high-voltage connection device or its housing can have a cylindrically sealed pin / housing area of a second section of the housing for each electrical phase, which encloses the electrically conductive socket and through an associated round opening or bore in a gear housing of the drive train is immersed.

Alternatively, it is also possible for the sockets to be surrounded by an oval-shaped contour as a further possible variant of individual pins/housing areas. According to this embodiment, it is conceivable to use only one seal and one opening in the transmission housing.

Furthermore, provision can be made for the electrical machines to have busbars or electrical conductors with integrated threaded bushings, starting from the interconnection.

• 1 räumliche Ansichten auf eine Hochvolt-Verbindungsvorrichtung nach einem ersten Ausführungsbeispiel;
• 2 räumliche Ansichten auf eine Hochvolt-Verbindungsvorrichtung nach einem zweiten Ausführungsbeispiel;
• 3 eine Schnittansicht einer Hochvolt-Verbindungsvorrichtung, angebracht an einem Getriebegehäuse eines Antriebsstrangs; und
• 4 bis 6 verschiedene räumliche Ansichten auf einen Antriebsstrang mit einer Hochvolt-Verbindungsvorrichtung.

In the following, the invention will be explained by means of exemplary embodiments in connection with gene drawings explained in more detail. Here show schematically:

• 1 spatial views of a high-voltage connection device according to a first embodiment;
• 2 spatial views of a high-voltage connection device according to a second embodiment;
• 3 a sectional view of a high-voltage connection device attached to a transmission housing of a drive train; and
• 4 until 6 various spatial views of a drive train with a high-voltage connection device.

In the following description, the same reference numbers are used for the same objects.

1 shows three-dimensional views of a high-voltage connection device 1 according to a first embodiment, wherein 2 shows spatial views of a high-voltage connection device 1 according to a second embodiment.

Due to the great similarity of the two exemplary embodiments, these are described together below and the differences are subsequently explained.

So is in the 1 and 2 a high-voltage connection device 1 for connecting power electronics 105, which can be arranged in a first housing space T of a drive train 100, with an electric machine 102, 103, which can be arranged in a second housing space F of a drive train 100 (cf. also e.g. 3 ), shown.

Here, the high-voltage connection device 1 according to 1 and 2 three first contact points 2 for contacting power electronics 105 (in 1 and 2 not shown - cf. 3 until 6 ) and three second contact points 3 for contacting an electrical machine 102, 103 (in 1 and 2 not shown - cf. 3 until 6 ).

Furthermore, the high-voltage connection device 1 has three electrically conductive elements 4, 5, 6 for transmitting voltage and current from the first contact points 2 to the second contact points 3. Thus, three phases of power electronics 105 with three corresponding phases of an electrical machine 102, 103 electrically connectable (cf. 3 until 6 ). In other words, to realize a three-phase AC voltage, a first, second and third electrically conductive element 4, 5, 6 each form a phase for supplying electrical energy to an electrical machine 102, 103.

Also show 1 and 2 , that each electrically conductive element 4, 5, 6 is designed in such a way that a single fastening means 118, 119, 120 (in 1 and 2 not shown - cf. 3 until 6 ) an electrical conductor 106, 107, 108; 109, 110, 111 of power electronics 105 with an electrical conductor 112, 113, 114; 115, 116, 117 of an electrical machine 102, 103 can be mechanically connected.

Here, each electrically conductive element 4, 5, 6 is similar in shape to a socket, so that a fastener 118, 119, 120 (not shown) can be passed through the at least one electrically conductive element 4, 5, 6. Thus, the high-voltage connection device 1 is on the one hand with an electrical conductor 106, 107, 108; 109, 110, 111 of power electronics 105 and on the other hand with an electrical conductor 112, 113, 114; 115, 116, 117 of an electrical machine 102, 103 can be mechanically connected (cf. 3 until 6 ).

According to 1 and 2 each electrically conductive element 4, 5, 6 has a first and a second end 7, 8, each forming an end face.

Each electrically conductive element 4, 5, 6 forms a first contact point 2 at its first end 7 and a second contact point 3 at its second end 8, with several or all three first contact points 2 and several or all three second contact points 3 arranged in a row and next to each other.

In summary, it can be stated that the high-voltage connection device 1 has three contact points 2, 3 as phase connections for connecting power electronics 105 and an electrical machine 102, 103.

Each first contact point 2 is used as a phase connection and for contacting power electronics 105, and each second contact point 3 is used as a phase connection and for contacting electrical machines 102, 103.

It should also be noted that each electrically conductive element 4, 5, 6 has copper or a material with a low electrical resistance. Thus, electrical energy can be efficiently transported.

Furthermore show 1 and 2 that the first and second contact points 2, 3 are designed as flat sections for easy contacting.

In addition, at the first end 7 of the electrically conductive elements 4, 5, 6, the flat sections of the first contact points 2 are oriented in the same way as a first plane E1. In addition, at the second end 8 of the electrically conductive elements 4, 5, 6, the flat sections of the second contact points 3 are oriented in the same way to a second plane E2. In this case, the first and second planes E1, E2 are aligned with one another in the same orientation.

Furthermore show 1 and 2 that the high-voltage connection device 1 comprises a housing 9, which isolates the electrically conductive elements 4, 5, 6 from one another, is positioned spatially relative to one another and is formed together as one component, which simplifies assembly and handling. In other words, the housing 9 partially encloses the electrically conductive elements 4, 5, 6.

As in 1 and 2 It can also be seen that the housing 9 has a first section 10 for attachment in a first housing space T of a drive train 100 for driving a hybrid or electric vehicle. Here, the first section 10 has a cuboid shape.

The first section 10 is designed in such a way that the first contact points 2 or the first ends 7 of the electrically conductive elements 4 , 5 , 6 are free of housing material in order to achieve effective electrical contact with power electronics 105 .

Furthermore, the first section 10 has separating elements 11 in order to eliminate clearance and creepage distances between first contact points 2 and thus between electrical conductors 106, 107, 108; 109, 110, 111 of power electronics 105 of a drive train 100 (cf. also 3 until 6 ).

The separating elements 11 protrude from a flat surface of the first subsection 10, the separating elements 11 being designed in a manner similar to a partition wall or similar to a separating web. A receiving area is thus formed for each first contact point 2, which causes a spatial delimitation of the first contact points 2 from one another.

In addition, the 1 and 2 that the housing 9 has a second section 12 for attachment in a transmission housing 101 and for attachment in a second housing space F of a drive train 100 for driving a hybrid or electric vehicle (cf. also 3 until 6 ).

The second section 12 is designed in such a way that the second contact points 3 or the second ends 8 of the electrically conductive elements 4, 5, 6 are free of housing material in order to achieve effective electrical contact with an electrical machine 102, 103.

The second section 12 of the housing 9 is designed in such a way that the second section 12 forms a guide for the correct or clear positioning of the high-voltage connection device 1 on a transmission housing 101 of a drive train 100 .

Furthermore, the 1 and 2 that the dimensions and dimensions of the first and second sections 10, 12 are such that the first section 12 forms a shoulder 15, with which the first section 10 can abut against a transmission housing 101 of a drive train 100 and can thus be positioned on the transmission housing 101 is (cf. also 3 until 6 ).

The first and second sections 10, 12 or the high-voltage connection device 1 or its housing 9 have a T-shape in a cross section along the electrically conductive elements 4, 5, 6. It is precisely this shape that realizes the shoulder 15, with which the first section 10 can be struck against a gear housing 101 of a drive train 100 and thus positioned on the gear housing 101 (cf. also 3 until 6 ). In this case, the housing 9 has a non-electrically conductive material, such as. B. a plastic.

Also show 1 and 2 that the second section 12 per electrically conductive element 4, 5, 6 ( 1 ) or for all electrically conductive elements 4, 5, 6 ( 2 ) several ( 1 ) or a circumferential groove 13 ( 2 ) for accommodating sealing elements 14, with which two housing spaces F, T of a drive train 100 for driving a hybrid or electric vehicle can be sealed from one another (cf. also 3 until 6 ).

According to the 1 and 2 the high-voltage connection device 1 has a plurality of sealing elements 14 ( 1 ) or a sealing element 14 ( 2 ).

The sealing elements 14 or the sealing element 14 are/is arranged on the second section 12 of the housing 9 of the high-voltage connection device 1 in order to seal off two housing spaces F, T of a transmission housing 101 of a drive train 100 from one another.

The sealing elements 14 are described in more detail, or the sealing element 14 is in grooves 13 ( 1 ) or in a groove 13 ( 2 ) The second section 12 of the housing 9 is arranged so that two housing spaces F, T of a transmission housing 101 of a drive train 100 for driving a hybrid or electric vehicle can be sealed against one another.

Referring to the first embodiment in 1 It can be seen that the second section 12 forms a separate housing area 12A, 12B, 12C for each electrically conductive element 4, 5, 6. This separate housing area 12A, 12B, 12C follows the shape of the electrically conductive elements 4, 5, 6, so that the separate housing areas 12A, 12B, 12C are spatially spaced apart from each other per electrically conductive element 4, 5, 6 and only across the first section 10 of the housing 9 are connected to each other. As a result, each electrically conductive element 4 , 5 , 6 in the second section 12 is individually surrounded or encased by the housing 9 of the second section 12 .

Described differently, the second section 12 for each electrically conductive element 4, 5, 6 is designed in the form of a bush or as a general hollow cylinder.

As already described, the second section 12 has three separate housing areas 12A, 12B, 12C, which are reminiscent of the contact pins of a mains plug.

Furthermore, the second section has 12 in 1 per electrically conductive element 4, 5, 6, a circumferential groove 13 for accommodating a sealing element 14, with which two housing spaces F, T of a drive train 100 for driving a hybrid or electric vehicle can be sealed from one another (cf. 3 until 6 ). In other words, the high-voltage connection device 1 has a groove 13 with an associated sealing element 14 per housing area 12A, 12B, 12C.

A guide for the correct positioning of the high-voltage connection device 1 on a transmission housing 101 of a drive train 100 is implemented with the aid of the separate housing regions 12A, 12B, 12C.

In the second embodiment after 2 the situation is different with regard to the configuration of the second section 12 .

Here, the second section 12 for all electrically conductive elements 4, 5, 6 forms a common or a single, coherent housing area 12A, which is designed as a general cylinder. As a result, the second section 12 is formed by a single housing area 12A, which surrounds or encases all the electrically conductive elements 4, 5, 6 together.

Described in more detail, the second subsection 12 is modeled jointly for all electrically conductive elements 4, 5, 6 in the form of a general cylinder on a counterpart that fits exactly into a slot with a specific depth.

Furthermore, the second section has 12 in 2 for all electrically conductive elements 4, 5, 6 together, a circumferential groove 13 for receiving the sealing element 14, with which two housing spaces F, T of a drive train 100 for driving a hybrid or electric vehicle can be sealed from one another (cf. 3 until 6 ).

A guide for the correct positioning of the high-voltage connection device 1 on a transmission housing 101 of a drive train 100 is implemented with the aid of the housing area 12A.

3 shows a sectional view of a high-voltage connection device 1, attached to a transmission housing 101 of a drive train 100, wherein 4 until 6 represent different spatial views of a drive train 100 with a high-voltage connection device 1.

According to the 3 until 6 the drive train 100 for driving a hybrid or electric vehicle has a transmission housing 101 with a first housing space T or with a dry space T and a second housing space F or with a fluid space F.

In addition, the drive train 100 has two electric machines 102, 103, which are arranged within the second housing space F of the transmission housing 101, and two high-voltage connection devices 1, arranged on the transmission housing 101, as described above with respect to 1 and 2 were portrayed.

The transmission housing 101 has two connecting gears 104 which connect the first T and the second housing space F with one another in a fluid-communicating manner.

One high-voltage connection device 1 is arranged per connection passage 104, so that using a sealing element 14 of a high-voltage connection device 1, which rests sealingly against the transmission housing 101 and in a groove 13 of the housing 9 of the high-voltage connection device 1, and using the high-voltage Connecting device 1 or by means of the housing 9 in each case a connecting passage 104 is sealed in a fluid-tight manner.

Each connecting passage 104 is geometrically adapted to the high-voltage connection device 1, so that two housing spaces F, T of the gearbox housing 101 can be separated from one another or sealed against one another.

Furthermore, each connecting passage 104 is geometrically adapted to a second section 12 of a housing 9 of the high-voltage connection device 1, so that one or more sealing elements 14 of the high-voltage connection device 1 seal off two housing spaces F, T of the transmission housing 101 from one another.

Furthermore, the 3 until 6 that the drive train 100 includes power electronics 105, which supplies the two electrical machines 102, 103 with voltage and current.

The power electronics 105 has three electrical conductors 106, 107, 108 per electrical machine 102, 103; 109, 110, 111, which are arranged at the first contact point 2 of the high-voltage connection device 1.

Furthermore, each electrical machine 102, 103 has three electrical conductors 112, 113, 114; 115, 116, 117, which are arranged at the second contact point 3 of the high-voltage connection device 1.

The three electrical conductors 112, 113, 114; 115, 116, 117 of the electrical machines 102, 103 current and voltage from the corresponding high-voltage connection device 1 or from the second contact points 2 to a stator of an electrical machine 102, 103.

With view on 3 , 4 and 6 it can be seen that each electrical conductor 112, 113, 114; 115, 116, 117 of an electrical machine 102, 103 has a socket B with a thread.

It is also shown that one electrical conductor 106, 107, 108; 109, 110, 111 of the power electronics 105, the high-voltage connection device 1 and one electrical conductor 112, 113, 114; 115, 116, 117 of an electrical machine 102, 103 are mechanically connected to one another by means of a single fastening means 118, 119, 120.

Each fastener 118, 119, 120 is designed as a screw.

In summary, it can be stated that each fastening means 118, 119, 120 has an electrical conductor 106, 107, 108; 109, 110, 111 of the power electronics 105 against a first contact point 2 of an electrically conductive element 4, 5, 6 of the high-voltage connection device 1 and an electrical conductor 112, 113, 114; 115, 116, 117 of an electric machine 102, 103 against a second contact point 3 of the electrically conductive element 4, 5, 6 of the high-voltage connection device 1, so that an electrical contact can be established. Since only one or just a single fastener 118, 119, 120 has to be used to connect one phase of the power electronics 105 and an electrical machine 102, 103 using the high-voltage connection device 1, the assembly effort can be simplified.

Below are the 1 until 6 additionally described in other words.

The two electrical machines 102, 103 only have busbars or electrical conductors 112, 113, 114; 115, 116, 117 with integrated threaded bushings or bushings B. In the assembly process, the threaded bushings B are connected directly to the busbars/electrical conductors 106, 107, 108; 109, 110, 111 of the power electronics 105 contacted. This reduces the number of electrical interfaces.

But also the thermal situation of the busbars / electrical conductors 112, 113, 114; 115, 116, 117 of the electrical machines 102, 103 within the gear housing 101 is advantageous because the individual busbars / electrical conductors 112, 113, 114; 115, 116, 117 are not thermally decoupled from a plastic carrier. In addition, the assembly process is improved since the electrical machines 102, 103 with the loose power rails/electrical conductors 112, 113, 114; 115, 116, 117 are mounted axially in the gear housing 101 and the accuracy as in an electrical machine with an integrated HV terminal is not necessary.

However, the installation of the HV terminal/high-voltage connection device 1 is also easier. After the electrical machines 102, 103 have been assembled, the HV terminals or the high-voltage connecting devices 1 are inserted from the outside into the opening/in the connecting passage 104 in the transmission housing 101. The integrated seals/sealing elements 14 in the HV terminal 1/in the high-voltage connection device 1 seal off the first housing space T for the HV contacting of the power electronics 105 from the transmission oil space F or from the second housing space F in the transmission housing 101.

Then the power electronics 105 is mounted from above on the transmission housing 101 and the busbars 106, 107, 108; 109, 110, 111 of the power electronics 105 directly through the sockets integrated in the HV terminal 1/integrated electrically conductive elements 4, 5, 6 with the busbars 112, 113, 114; 115, 116, 117 of the electrical machines 102, 103 screwed.

One end face of the electrically conductive elements 4, 5, 6, which is located in a dry space or in the first housing space T, separated from the transmission oil space/second housing space F, makes electrical contact with the busbar 106, 107, 108; 109, 110, 111 of the power electronics 105 and the other end face, which is located in the transmission oil chamber F/second housing chamber F, an electrical contact to a busbar 112, 113, 114; 115, 116, 117 of the electrical machines 102, 103 ago. The two contacts are by the screwing forces between the screw and on the busbar 112, 113, 114; 115, 116, 117 of the electrical machine 102, 103 integrated threaded bush B axially braced.

Reference List

1

High-voltage connection device

2

first point of contact

3

second point of contact

4

electrically conductive element

5

electrically conductive element

6

electrically conductive element

7

first end

8th

second end

9

Housing

10

first section

11

separator

12

second section

12A

housing area

12B

housing area

12C

housing area

13

groove

14

sealing element

15

Unit volume

100

powertrain

101

gear case

102

electric machine

103

electric machine

104

connecting corridor

105

power electronics

106 - 117

electrical conductor

118

fasteners

119

fasteners

120

fasteners

T

first housing room

f

second housing space

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102019122805 [0002]

Claims (10)

High-voltage connection device (1) for connecting power electronics (105) to an electrical machine (102, 103), having: - at least one first contact point (2) for contacting power electronics (105), - at least one second contact point (3) for contacting an electrical machine (102, 103), and - at least one electrically conductive element (4, 5, 6) for transmitting voltage and current from the at least one first contact point (2) to the at least one second contact point (3), so that at least one phase of power electronics (105) can be electrically connected to at least one phase of an electrical machine (102, 103), characterized in that the at least one electrically conductive element (4, 5, 6) is designed in such a way that a single fastening means ( 118, 119, 120) an electrical conductor (106, 107, 108; 109, 110, 111) of power electronics (105) with an electrical conductor (112, 113, 114; 115, 116, 117) of an electrical machine (102, 103) can be mechanically connected. High-voltage connection device claim 1 , - wherein each electrically conductive element (4, 5, 6) is designed in its shape similar to a socket or as a general hollow cylinder, so that a fastening means (118, 119, 120) can be passed through the at least one electrically conductive element (4, 5, 6 ) can be passed through the high-voltage connection device (1) on the one hand with an electrical conductor (106, 107, 108; 109, 110, 111) of power electronics (105) and on the other hand with an electrical conductor (112, 113, 114; 115, 116, 117) of an electrical machine (102, 103) to be mechanically connected. High-voltage connection device claim 1 or 2 - wherein the high-voltage connection device (1) comprises a housing (9) which insulates the electrically conductive elements (4, 5, 6) from one another, positions them spatially in relation to one another and/or connects them to one another to form a component, thereby simplifying assembly and handling - wherein the housing (9) has a first subsection (10) for attachment in a first housing space (T) of a drive train (100) for driving a hybrid or electric vehicle, - wherein the first subsection (10) has separating elements (11 ) to ensure air and creepage distances between first contact points (2) and thus between electrical conductors (106, 107, 108; 109, 110, 111) of power electronics (105) of a drive train (100). High-voltage connection device according to one of the preceding claims, - wherein the high-voltage connection device (1) comprises a housing (9) which insulates the electrically conductive elements (4, 5, 6) from one another, positions them spatially in relation to one another and/or connects them to one component, thereby simplifying assembly and handling, - wherein the housing (9) has a second section (12) for attachment in a transmission housing (101) and for attachment in a second housing space (F) of a drive train (100) for driving a hybrid or electric vehicle, - The second section (12) of the housing (9) being designed such that the second section (12) forms a guide for the clear positioning of the high-voltage connection device (1) on a transmission housing (101) of a drive train (100). High-voltage connection device claim 4 - wherein the second section (12) forms a separate housing area (12A, 12B, 12C) for each electrically conductive element (4, 5, 6) which follows the shape of the at least one electrically conductive element (4, 5, 6). , so that the separate housing areas (12A, 12B, 12C) per electrically conductive element (4, 5, 6) are spatially spaced from one another and are only connected to one another via the first section (10) of the housing (9), whereby each electrically conductive element (4, 5, 6) in the second section (12) is individually surrounded by the housing (9) of the second section (12), - the second section (12) for each electrically conductive element (4, 5, 6) in Is formed in the form of a socket or as a general hollow cylinder. High-voltage connection device claim 4 , - wherein the second section (12) for all electrically conductive elements (4, 5, 6) forms a single, coherent housing area (12A), which is designed as a general cylinder, whereby the second section (12) of a single housing area ( 12A) is formed, which surrounds all electrically conductive elements (4, 5, 6) together, - the second partial section (12) being modeled on a counterpart together for all electrically conductive elements (4, 5, 6) in the form of a general cylinder , which fits exactly into a slot with a certain depth. High-voltage connection device according to one of Claims 1 until 4 in combination with claims 5 and 6 , - wherein the first and second sections (10, 12) in their measurements and dimensions are designed in such a way that the first section (12) forms a shoulder (15) with which the first section (10) can be abutted against a transmission housing (101) of a drive train (100) and thus on the transmission housing (101) is positionable, - wherein the first and second sections (10, 12) have a T-shape in a cross section along the at least one electrically conductive element (4, 5, 6). High-voltage connection device according to one of the preceding claims, - wherein the high-voltage connection device (1) comprises at least one sealing element (14), - wherein the at least one sealing element (14) is arranged in a groove (13) of a second section (12) of a housing (9) of the high-voltage connection device (1), so that two housing spaces (F, T) of a transmission housing (101) Drive train (100) for driving a hybrid or electric vehicle are sealed against each other. Power train (100) for driving a hybrid or electric vehicle comprising: - a transmission housing (101) with a first housing space (T), in particular a dry space, and a second housing space (F), in particular a fluid space, - At least one electrical machine (102, 103) which is arranged within the second housing space (F) of the transmission housing (101), and - At least one high-voltage connection device (1) according to one of the preceding claims, arranged on the transmission housing (101), - wherein the transmission housing (101) comprises at least one connecting passage (104) which connects the first (T) and the second housing space (F) to one another in fluid communication, - wherein a high-voltage connection device (1) is arranged in at least one connecting passage (104), so that with the aid of at least one sealing element (14) of the high-voltage connection device (1), which forms a seal against the transmission housing (101) and in a groove (13) of the housing (9) of the high-voltage connection device (1), and with the aid of the high-voltage connection device (1) the at least one connection passage (104) is sealed in a fluid-tight manner, - wherein the at least one connecting passage (104) is geometrically adapted to the high-voltage connection device (1) or its second section (10), so that two housing spaces (F, T) of the transmission housing (101) can be separated from one another. drive train after claim 9 , - wherein the drive train (100) comprises power electronics (105) which supplies the at least one electric machine (102, 103) with voltage and current, - wherein the power electronics (105) per electric machine (102, 103) at least one electric Conductor (106, 107, 108; 109, 110, 111), - wherein the at least one electrical conductor (106, 107, 108; 109, 110, 111) at a first contact point (2) of the high-voltage connection device (1) is arranged, - wherein the at least one electrical machine (102, 103) has at least one electrical conductor (112, 113, 114; 115, 116, 117) which is arranged at a second contact point (3) of the high-voltage connection device (1). - wherein each electrical conductor (112, 113, 114; 115, 116, 117) of an electrical machine (102, 103) has a socket (B), - wherein an electrical conductor (106, 107, 108; 109, 110 , 111) of the power electronics (105), the high-voltage connection device (1) and an electrical conductor (112, 113, 114; 115, 116, 117) of an electrical machine (102, 103) are mechanically connected to one another by means of a single fastening means (118, 119, 120), - the fastening means (118, 119, 120) being designed as a screw.

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