Low-voltage connection device for electric or hybrid vehicle drive and electric or hybrid vehicle drive

Abstract

The utility model relates to a low-voltage connection device (1) for an electric or hybrid vehicle drive (100) and for connecting a power electronics device (110) to at least one low-voltage device (103, 104, 105, 106, 107), comprising: a first connection device (2) for connecting the power electronics device (110) of the vehicle drive (100), a second connection device (3) for connecting one or more low-voltage devices (103, 105) of the vehicle drive (100), the low-voltage connection device (1) comprising a third connection device (4) for connecting one or more low-voltage devices (104, 106, 107) of the vehicle drive (100), such that, in the two electric motors (101, 102) of the vehicle drive (100), the one or more low-voltage devices (104, 106, 107) of the vehicle drive (100) are connected to one or more low-voltage devices (103, 105) of the vehicle drive (100), the one or more low-voltage devices (104, 106, 107) of the vehicle drive (100) are connected to the third connection device (4). At least one low-voltage device (103, 104, 105, 106, 107) of the electric machine (101, 102) can be connected to a power electronics device (110) of the vehicle drive (100) by means of a single low-voltage connection device (1). The utility model further relates to an electric or hybrid vehicle drive (100) having the low-voltage connection device (1).

Description

Technical Field

[0001] The invention relates to a low-voltage connecting device for an electric or hybrid vehicle drive and an electric or hybrid vehicle drive having a low-voltage connecting device. Background Art

[0002] From the prior art, for example from DE 10 2019 122 805, it is known to realize a low-voltage contact arrangement or a low-voltage connection arrangement for two electric machines of a vehicle drive, which has two separate low-voltage terminals or two separate low-voltage connection devices.

[0003] In this case, the low-voltage connection device of each electric machine transmits the signals of the rotor position sensor and the temperature sensor to the power electronics of the vehicle.

[0004] According to the solution in DE 10 2019 122 805, in addition to two high-voltage terminals or high-voltage connecting devices, four electrical interfaces for the power electronics are obtained via two low-voltage terminals or low-voltage connecting devices.

[0005] The high number of interfaces presents a challenge in terms of manufacturing precision and tolerances for the installation process of the power electronics on an electric machine or, for example, on a discrete hybrid transmission (DHT transmission), but also for the sealing of the individual connecting devices.

[0006] Furthermore, plugs or connectors of the sensors used in the electric machine (rotor position sensors and / or temperature sensors) must be in contact with the corresponding low-voltage connections without being seen during final assembly of the cover or transmission cover, since the rotor position sensors are usually pre-mounted on the transmission cover.

[0007] This results in the sensor plug / plug connection requiring additional equipment on the cover for tolerance compensation. The high number of electrical connections with associated sealing elements also results in an increased number of components and thus increased installation and production costs. Summary of the Invention

[0008] The object of the present invention is therefore to provide a low-voltage connecting device for an electric or hybrid vehicle drive and for connecting a power electronic device to at least one low-voltage device, as well as an electric or hybrid vehicle drive, wherein the low-voltage connecting device or the electric or hybrid vehicle drive can be manufactured cost-effectively, installed in small quantities and simply installed, and enables improved or simplified contacting of low-voltage devices of the vehicle drive, such as sensors.

[0009] The objects are achieved by the following features.

[0010] According to a first aspect of the present invention, a low-voltage connecting device for an electric or hybrid vehicle drive and for connecting power electronics to at least one low-voltage device includes a first connecting device for connecting the power electronics of the vehicle drive. In this manner, the low-voltage connecting device can be supplied with current and voltage, but also allows, for example, values ​​of the low-voltage device to be read out.

[0011] Furthermore, the low-voltage connecting device has a second connecting device for connecting one or more low-voltage devices of the vehicle drive.

[0012] A low-voltage connection device can be part of a system in an electric or hybrid vehicle that can be operated with an AC voltage of up to and including 30 V or a DC voltage of up to and including 60 V within the vehicle. Such systems are generally referred to as low-voltage systems or low voltage (NV) and are used in particular in the vehicle's onboard electrical system.

[0013] Furthermore, the low-voltage connection device includes a third connection device for connecting one or more low-voltage devices of the vehicle drive. Thus, at least one low-voltage device of each of the two electric motors of the vehicle drive can be connected to the power electronics of the vehicle drive via a single low-voltage connection device. This reduces the number of interfaces, thereby further simplifying installation. In other words, due to the third connection device, only a single low-voltage connection device is required to connect the low-voltage devices of the first electric motor and the low-voltage devices of the second electric motor simultaneously and jointly via the first connection device. This makes it possible to implement a low-voltage connection device that is installation-friendly and requires minimal installation.

[0014] Furthermore, the low-voltage connecting device can be configured and designed to conduct voltage and current from the second connecting device to the first connecting device and vice versa.

[0015] The low-voltage connecting device can also be configured and designed to conduct voltage and current from the third connecting device to the first connecting device and vice versa.

[0016] Each electrical connection between the second and / or third connecting means and the first connecting means causes the exchange or transmission of electrical signals in addition to electrical energy. In other words, in both cases, for example, a sensor or low-voltage device can be supplied with electrical energy and its acquired data can be read out.

[0017] Furthermore, the first connecting device can have at least two contacts, by means of which the second and third connecting devices can be electrically connected to the power electronics of the vehicle drive.

[0018] Furthermore, of the at least two contacts, at least one contact is electrically connected to the second connecting device and at least one contact is electrically connected to the third connecting device.

[0019] In both feature groups, the first and / or third low-voltage devices can be releasably contacted jointly or simultaneously via different contacts of the first connecting device with a single plug-in connector of the power electronics of the vehicle drive, in a manner that is connectable to the second connecting device, and the second and / or fourth and / or fifth low-voltage devices can be releasably contacted jointly or simultaneously via different contacts of the first connecting device. Thus, a single low-voltage connecting device is sufficient to bring the low-voltage devices at the second and third connecting devices together at the first connecting device, so that all low-voltage devices can be contacted at once by connecting to the low-voltage connecting device using the plug-in connector of the power electronics, which is contactable at the first connecting device. This also allows the low-voltage devices of multiple electric machines to be contacted simultaneously or jointly.

[0020] Furthermore, the second connecting device can have at least one contact portion, by means of which the first and / or second low-voltage device can be releasably contacted with the low-voltage connection device. In this way, the low-voltage device can be quickly and safely removed and reconnected in the event of maintenance. This allows for faster and simpler installation and removal.

[0021] Furthermore, the third connecting device can have at least one contact portion, by means of which the second and / or fourth and / or fifth low-voltage devices can be releasably contacted with the low-voltage connection device. Thus, for example, in maintenance situations, the low-voltage devices can be quickly and safely removed and reconnected. This simplifies installation and removal.

[0022] Furthermore, the low-voltage connecting device can have a rod-shaped or rod-shaped housing. Thus, the low-voltage connecting device can be placed or pushed into the machine housing of the vehicle drive in a space-saving manner.

[0023] The housing or the low-voltage connection device can have a shape similar to a screwdriver having a handle and a bit.

[0024] The housing or the low-voltage connecting device can have a first and a second section.

[0025] In this case, a first portion of the shape can be similar to a screwdriver head and a second portion of the shape can be similar to a screwdriver handle.

[0026] The first section can comprise the second connecting means.

[0027] The second section can include the first and third connecting means.

[0028] The transition from the first section to the second section can be designed to be smooth in order to facilitate insertion into the machine housing.

[0029] Furthermore, the low-voltage connection device can have two seals that seal the first connection device when it engages with the machine housing of the electric machine, but allow access to the first connection device. In this way, for example, spaces containing oil for cooling and / or lubrication can be sealed by means of the seals.

[0030] The first seal can be arranged in the second section of the housing of the low-pressure connecting device.

[0031] The second seal can be arranged at or in the transition from the first section to the second section of the housing of the low-pressure connecting device or between the first and second sections of the housing of the low-pressure connecting device.

[0032] The second sealing element can be designed in the form of an annular ring or as an O-ring.

[0033] Furthermore, the low-voltage connecting device can comprise a first and a second end, wherein the first end forms the second connecting means and / or the second end forms the third connecting means.

[0034] The low-voltage connecting device can also include a rod-shaped housing having a first and a second end. The rod-shaped housing can be designed similar to a cylinder or cylindrical.

[0035] In this case, the housing can have a retaining device, by means of which the low-voltage connecting device can be fastened to a cover of a machine housing of the vehicle drive.

[0036] The holding device can be arranged at the second end of the housing. In this way, a simple and rapid mounting of the low-voltage connecting device on the cover of the machine housing of the vehicle drive can be achieved.

[0037] Furthermore, the holding device can have a lead-through, through which a screw can be guided in order to fasten the holding device to a cover of a machine housing of the vehicle drive.

[0038] Furthermore, the second and / or third connecting device can have at least one receptacle, into which a plug-in device of the low-voltage device can be releasably inserted.

[0039] The first end of the housing of the low-voltage connecting device can have at least one receptacle for a plug-in device of a low-voltage device of a vehicle drive. Due to the placement at the end of the housing, the receptacle is easily accessible, thus simplifying installation.

[0040] The second end of the housing of the low-voltage connecting device can have at least one receptacle for a plug-in device of a low-voltage device of a vehicle drive. Due to being arranged at the end of the housing, the receptacle is easily accessible for installation.

[0041] At least one receptacle can be designed as a socket or modular socket for a plug-in device of a low-voltage device. In this specification, a modular socket is understood to mean a socket that is suitable for a modular plug. A modular plug can be understood, for example, as a plug commonly used in star networks (e.g., twisted-pair Ethernet). Similar considerations naturally apply to modular sockets.

[0042] At least one receptacle can also have a first locking device, so that a plug-in device of the low-voltage device can be releasably fastened on the receptacle.

[0043] The first locking device can be designed as a recess for the locking hook. This allows the low-voltage device to be quickly and safely positioned on the low-voltage connection device. This saves time, for example, during disassembly or, alternatively, during installation. This also simplifies disassembly and installation.

[0044] Furthermore, at least one receptacle of the second connecting device and at least one receptacle of the third connecting device can have a plug-in direction along which a respective plug-in device can be inserted into the receptacle, wherein the plug-in directions intersect or intersect. The differently oriented receptacles or different plug-in directions can simplify installation and removal of the vehicle drive.

[0045] The plugging direction of the receptacle of the second connecting device can extend in the first direction, and the plugging direction of the receptacle of the third connecting device can extend in the second direction.

[0046] The first direction can extend in the direction of the rod-shaped housing of the low-voltage connecting device.

[0047] The second direction can extend transversely to the direction of the rod-shaped housing of the low-voltage connecting device.

[0048] Furthermore, the housing of the low-voltage connection device can comprise reinforcing ribs, thereby making it possible to save material and weight. A solid housing is therefore not conceivable.

[0049] A second aspect of the present invention comprises an electric or hybrid vehicle drive.

[0050] It is emphasized that the features of the low-voltage device as explained under the first aspect can be used individually or in combination with one another in a vehicle drive.

[0051] In other words, the features mentioned above in connection with the first aspect of the invention relating to the low-voltage connection device can also be combined with other features here in connection with the second aspect of the invention.

[0052] According to a second aspect, an electric or hybrid vehicle drive comprises the or only low-voltage connection device according to the first aspect.

[0053] Furthermore, the vehicle drive includes two electric motors and power electronics having a plug-in device configured as a plug or modular plug and / or connected to a first connecting device. In this specification, a modular plug is understood to mean a plug that fits into a modular jack. For example, a modular plug can be understood to mean a plug commonly used in star networks (e.g., twisted-pair Ethernet). Similarly, the modular jack can of course be applied.

[0054] In this case, the plug-in device of the power electronics is connected to the first connecting device of the low-voltage connecting device in order to electrically connect the power electronics to the low-voltage connecting device.

[0055] Furthermore, the vehicle drive can have a first and / or a third low-pressure device, wherein the first and / or the third low-pressure device can be connected to the second connecting device.

[0056] Furthermore, the first and / or third low-voltage device can each have at least one mating contact portion, which contacts at least one contact portion of the second connecting device. In this way, current and / or voltage and / or electrical signals can be transmitted between the low-voltage device and the low-voltage connecting device.

[0057] The first and / or third low-voltage device can be designed as a temperature sensor and / or a rotor position sensor, thereby being able to detect the temperature and position of the rotor and / or the stator of the electric machine.

[0058] Furthermore, the vehicle drive can have a second and / or fourth and / or fifth low-pressure device.

[0059] The second and / or fourth and / or fifth low-voltage device can be connected to the third connecting device.

[0060] The second and / or fourth and / or fifth low-voltage devices can each have at least one mating contact that contacts at least one contact of the third connecting device. Thus, current and / or voltage and / or electrical signals can be transmitted between the low-voltage device and the low-voltage connecting device.

[0061] The second and / or fourth and / or fifth low-voltage device can be designed as a temperature sensor and / or a rotor position sensor, thereby being able to detect the temperature and position of the rotor and / or the stator of the electric machine.

[0062] Furthermore, the plug-in device of the power electronics can be connected to the first connecting device. In this way, the low-voltage connecting device can be connected to the power electronics.

[0063] The plug-in device of the power electronic device can have at least two mating contacts, which contact at least two contacts of the first connecting device. Here, each contact of the first connecting device can lead to the second and third connecting devices, so that the second and third connecting devices can be electrically connected to the first connecting device.

[0064] The plug-in connection of the power electronics can have at least one seal, which bears sealingly against the machine housing of the vehicle drive and the plug-in connection of the power electronics.

[0065] Furthermore, the vehicle drive can include a machine housing having an opening for contacting the first connecting device.

[0066] Two electric motors can be arranged in the machine housing.

[0067] The low-voltage connecting device can be arranged in the machine housing in such a way that the first connecting means is in contact with the power electronics through the opening.

[0068] Furthermore, the plug-in connection device of the low-voltage device can include a second locking device that releasably locks or can releasably lock with the first locking device of the receptacle of the second or third connecting device. In this way, the low-voltage device can be quickly and safely removed and reconnected during maintenance. This allows for faster and simpler installation and removal.

[0069] In this case, the second locking device can be designed as a locking hook which engages in the first locking device designed as a recess.

[0070] Finally, it should be noted that the vehicle drive is a transmission or a part of a transmission. In a specific embodiment, the vehicle drive is a separate hybrid transmission.

[0071] The inventive concept presented above is supplementarily expressed below in other languages.

[0072] The concept—illustrated in a simplified manner—relates to a low-voltage terminal or a low-voltage connecting device.

[0073] The low-voltage connecting device can be used to make contact with two electric machines of the vehicle drive or low-voltage devices connected thereto by means of a single low-voltage connecting device via a single plug-in device or a single plug of the power electronics of the vehicle drive. The low-voltage connecting device is thus designed as a unit having only one electrical connection and only one sealing point for the power electronics of the vehicle drive.

[0074] The low-voltage terminal or the low-voltage connecting device can have, on the cover side, interfaces to a rotor position sensor of the first electric machine and to two temperature sensors of the first and second electric machine.

[0075] The low-voltage connecting device can be designed such that it can be mounted on the cover with one end and projected or pushed into the machine housing through the opening with the other end, which can simultaneously be designed as a mating plug for the rotor position sensor.

[0076] In radially arranged electric machines, the low-voltage connection device can be pre-installed on the cover or transmission cover together with the common stator for the first and second electric machines. This pre-installation process is advantageous because the plug / slot device for the rotor position sensor of the first electric machine and the two plug / slot devices for the temperature sensors of the first and second electric machines can be installed manually and in a visible manner. The transmission-mountable plug of the rotor position sensor of the second electric machine can then be manually brought into visible contact with the low-voltage terminal / the low-voltage connection device during transmission installation, after the two rotors of the electric machines and the common stator have been assembled.

[0077] Another embodiment variant of the low-voltage connecting device can be used in a transmission with an axially arranged machine. Here, the low-voltage connecting device can be pre-installed on the transmission cover / cover together with the stator of the first electric machine, and the connecting device of the first electric machine can be visibly manually contacted. Contacting the connecting device of the second electric machine can also be visibly manually contacted on the transmission side after both electric machines have been assembled.

[0078] In both variants, the power electronics can be sealed in the machine housing relative to the oil transmission space in the direction of the first connecting device.

[0079] In summary, the present invention may include the following features:

[0080] - a low-voltage terminal / low-voltage connecting device as a low-voltage contact / low-voltage device contact for two electric machines with power electronics; and / or

[0081] a low-voltage terminal / low-voltage connecting device having only one or only one interface or connection device to the power electronics; and / or

[0082] a low-voltage terminal / low-voltage connecting device with interfaces to two temperature sensors and two rotor position sensors with plug contacts / plug devices; and / or

[0083] A low-voltage terminal / low-voltage connecting device, wherein the interface to the power electronics of the vehicle drive can be sealed relative to the oil-transmission area. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The present invention will be described in detail below based on the embodiments in conjunction with the accompanying drawings. Schematically shown here:

[0085] Figure 1 A spatial view of a low-voltage connection device for an electric or hybrid vehicle drive according to a first embodiment is shown;

[0086] Figure 2 A spatial view of a low-voltage connection device for an electric or hybrid vehicle drive according to a second embodiment is shown;

[0087] Figure 3 A spatial view of an electric or hybrid vehicle drive with a low-voltage connection device, without a machine housing but with a cover, is shown;

[0088] Figure 4 and 5 Show the basis Figure 3 Another spatial view of an electric or hybrid vehicle drive with a low-voltage connecting device, but with a machine housing; and

[0089] Figure 6 A sectional view of an electric or hybrid vehicle drive with a low-voltage connection device arranged on a machine housing is shown. DETAILED DESCRIPTION

[0090] In the following description, the same reference numerals are used for the same objects.

[0091] Figure 1 A spatial view of a low-voltage connecting device 1 for an electric or hybrid vehicle drive 100 according to a first exemplary embodiment is shown.

[0092] In more detail, Figure 1 A circuit for an electric or hybrid vehicle drive 100 (not shown) and for connecting a power electronics device 110 (not shown) to low-voltage devices 103, 104, 106, 107 (not shown; in FIG. Figure 1 Only the low-voltage connecting device 1 to which the plug-in devices 112 of the low-voltage devices 103 , 104 , 106 , 107 are connected (more details to be given below) is shown.

[0093] In this case, the low-voltage connecting device 1 has a first connecting device 2 for connecting power electronics 110 (not shown) of the vehicle drive 100 and a second connecting device 3 for connecting a low-voltage device 103 (not shown) of the vehicle drive 100 .

[0094] Furthermore, the low-voltage connecting device 1 includes a third connecting device 4 for connecting a plurality of low-voltage devices 104, 106, 107 of the vehicle drive 100. Thus, it is possible for at least one low-voltage device 103, 104, 106, 107 of each of the two electric machines 101, 102 (not shown) of the vehicle drive 100 to be connected to the power electronics 110 of the vehicle drive 100 via a single low-voltage connecting device 1. This reduces the number of interfaces, thereby further simplifying installation.

[0095] In other words, due to the third connecting device 4, only a single low-voltage connecting device 1 is required in order to contact the low-voltage devices of the first electric machine and the low-voltage devices of the second electric machine jointly and simultaneously via the first connecting device 2. In this way, a low-voltage connecting device 1 that is easy to install and easy to install can be achieved.

[0096] Here, the low-voltage connecting device 1 is configured and constructed to conduct voltage and current from the second connecting device 3 to the first connecting device 2 and vice versa. Furthermore, the low-voltage connecting device 1 is configured and constructed to conduct voltage and current from the third connecting device 4 to the first connecting device 2 and vice versa. Each electrical connection between the second and third connecting devices 3, 4 and the first connecting device 2 allows for the exchange or transmission of electrical signals in addition to electrical energy. Again, in other words, in both cases, for example, sensors or low-voltage devices can be supplied with electrical energy and their acquired data can be read out.

[0097] For this purpose, the first connecting device 2 has different contacts 2A, 2B (see Figure 1 ), by means of which the second and third connecting devices 3 , 4 can be electrically connected to the power electronics 110 of the vehicle drive 100 .

[0098] Of the different contacts 2A, 2B, of which two are mentioned by way of example, at least one contact is electrically connected to the second connecting device 3 and at least one contact is electrically connected to the third connecting device 4 .

[0099] In the manner described, the first low-pressure device 103 (at Figure 1 Only the plug-in device 112 of the low-voltage device is shown in FIG. 1 ) can be connected to the second connecting device 3, as well as the second, fourth and fifth low-voltage devices 104, 106, 107 (in FIG. Figure 1 1 and 2 (shown in FIG1 ). The low-voltage devices 103, 104, 106, 107 can be connected to the third connecting device 4 (only the plug-in device 112 of the low-voltage device is shown). In this case, the low-voltage devices 103, 104, 106, 107 can be detachably contacted together or simultaneously via different contacts 2A, 2B of the first connecting device 2 with a single plug-in device 111 (not shown) of the power electronics 110 (not shown) of the vehicle drive 100.

[0100] Thus, a single low-voltage connecting device 1 is sufficient to bring together the low-voltage devices 103, 104, 106, 107 at the second and third connecting devices 3, 4 to the first connecting device 2, so that all low-voltage devices 103, 104, 106, 107 can be contacted at once by means of a plug-in device 111 (not shown) of the power electronics 110 (not shown) in a manner accessible at the first connecting device 2. In this way, the low-voltage devices of multiple electric machines can also be contacted simultaneously or jointly.

[0101] Furthermore, the second connecting device 3 has a plurality of contacts (not shown), by means of which the first low-voltage device 103 (at Figure 1 The third connecting device 4 also has a plurality of contacts (not shown), by means of which the second, fourth and fifth low-voltage devices 104, 106, 107 (in the figure) can be releasably contacted with the low-voltage connecting device 1. Figure 1 The plug-in connector 112 of the low-voltage device (only shown in FIG) can be releasably contacted with the low-voltage connection device 1. In this way, the low-voltage device can be quickly and safely removed and reconnected in the event of maintenance. This makes installation and removal faster and simpler.

[0102] like Figure 1 As shown, the low-voltage connection device 1 has a rod-shaped housing 5. Specifically, the housing 5 has a shape similar to a screwdriver with a handle and a blade. Therefore, the low-voltage connection device 1 can be placed in the machine housing 108 of the vehicle drive device 100 (see, for example, Figures 3 to 6 )middle.

[0103] Furthermore, the housing 5 has a first and a second section 6 , 7 , wherein the first section 6 is approximately in the shape of a screwdriver bit and the second section 7 is approximately in the shape of a screwdriver handle.

[0104] In this case, the first section 6 comprises the second connecting device 3 and the second section 7 comprises the first and third connecting devices 2 , 4 .

[0105] also, Figure 1 The low-voltage connection device 1 is shown to have two seals 8, 9, which seal the first connection device 2 when it engages with the machine housing 108 of the electric machine 100 (not shown), but allow access to the first connection device 2. In this way, a space in which oil for cooling and / or lubrication is located, for example, can be sealed by means of the seals 8, 9.

[0106] The first seal 8 is arranged in the second section 7 of the housing 5 of the low-pressure connecting device 1. The second seal 9 is arranged in the transition from the first section 6 to the second section 7 of the housing 5 of the low-pressure connecting device 1, or between the first section 6 and the second section 7 of the housing 5 of the low-pressure connecting device 1.

[0107] The two sealing elements 8 , 9 are designed in annular shape or as O-rings.

[0108] So outside Figure 1 As can be seen in FIG, the low-voltage connecting device 1 has a first end 10 and a second end 11 , wherein the first end 10 forms the first connecting device 3 and the second end 11 forms the third connecting device 4 .

[0109] also, Figure 1 As shown, the housing 5 has a holding device 12, by means of which the low-voltage connecting device 1 can be fastened to a machine housing 108 (not shown - see Figures 3 to 5 ) of the cover 114 (not shown—see Figures 3 to 5 ) on (instead see Figure 3 and 6 ). Here, the holding device 12 is arranged at the second end 11 of the housing 5.

[0110] The holding device 12 comprises a lead-through through which a screw can be guided in order to fasten the holding device 12 to a cover 114 of a machine housing 108 (not shown) of the vehicle drive 100 .

[0111] In addition, from Figure 1 It can be seen that the second and third connecting devices 3 , 4 have a plurality of receptacles 13 , 14 into which a plug-in device 112 of a low-voltage device 103 , 104 , 106 , 107 can each be detachably inserted.

[0112] The first end 10 of the housing 5 of the low-voltage connecting device 1 has a receptacle 13 , while the second end 11 of the housing 5 of the low-voltage connecting device 1 comprises three receptacles 14 for each of a plug-in connection 112 for the low-voltage devices 104 , 106 , 107 of the vehicle drive 100 .

[0113] Each receptacle 13 , 14 is designed as a socket or modular socket for a plug-in device 112 of a low-voltage device 103 , 104 , 106 , 107 .

[0114] Furthermore, each receptacle 13 , 14 has a first locking device 15 , so that the plug-in device 112 of the low-voltage device 103 , 104 , 106 , 107 can be releasably fastened on the receptacle 13 , 14 .

[0115] In this case, the first locking device 15 is designed as a recess for a locking hook, whereby a quick and secure arrangement of the low-voltage device on the low-voltage connecting device 1 is possible.

[0116] also, Figure 1 It is shown that the receptacle 13 of the second connecting device 3 and the receptacle 14 of the third connecting device 4 have plug-in directions S1, S2, along which a respective plug-in device 112 can be inserted into the receptacle 13, 14. In this case, the plug-in directions S1, S2 intersect or intersect.

[0117] In other words, the plugging direction S1 of the receptacle 13 of the second connecting device 3 extends in the first direction, and the plugging direction S2 of the receptacle 14 of the third connecting device 4 extends in the second direction.

[0118] In this case, a first direction or plugging direction S1 runs in the direction of the rod-shaped housing 5 of the low-voltage connecting device 1 , and a second direction or plugging direction S2 runs transversely to the direction of the rod-shaped housing 5 .

[0119] By means of differently oriented receptacles or different plug-in directions S1 , S2 , the assembly and disassembly of the vehicle drive 100 can be simplified.

[0120] like Figure 1 It can furthermore be seen that the housing 5 of the low-voltage connecting device 1 has reinforcing ribs, whereby material and weight can be saved.

[0121] Figure 2 A spatial view of a low-voltage connecting device 1 for an electric or hybrid vehicle drive 100 according to a second exemplary embodiment is shown.

[0122] More precisely, Figure 1 A circuit for an electric or hybrid vehicle drive 100 is shown and for connecting a power electronics 110 to low-voltage devices 103, 104, 105, 106, 107 (not shown; in FIG. Figure 2 Only the low-voltage connecting device 1 to which the plug-in connectors 112 of the low-voltage devices 103 , 104 , 105 , 106 , 107 are connected is shown.

[0123] Low voltage connection equipment 1 according to Figure 2 The first connection device 2 has a power electronic device 110 (not shown) for connecting to the vehicle drive 100 and low-voltage connection devices 103, 105 (not shown; in FIG. Figure 2 Only the second connecting device 3 of the plug-in device 112 of the low-voltage device 103 , 104 , 105 , 106 , 107 is shown.

[0124] Furthermore, the low-voltage connecting device 1 comprises a third connecting device 4 for connecting a plurality of low-voltage devices 104, 106, 107 of the vehicle drive 100. Thus, it is possible for each of the two electric machines 101, 102 (not shown) of the vehicle drive 100 to be connected to the power electronics 110 of the vehicle drive 100 by means of a single low-voltage connecting device 1.

[0125] In order to avoid unnecessary repetition of reference to other embodiments, Figure 1 The first embodiment of the present invention is described, and the other embodiments described are applicable here in a similar manner.

[0126] Therefore, only the differences between the first and second embodiments are discussed below.

[0127] First, in Figure 1 and Figure 2 The comparison shows that the housing 5 is different. The second exemplary embodiment of the low-voltage connection device 1 is rod-shaped or cylindrical, while the first exemplary embodiment also shows a rod-shaped design, but also a screwdriver-like shape with a handle and a bit.

[0128] In addition, Figure 1 and Figure 2 In comparison, it is noticeable that a low-pressure device 103 (see Figure 1 ) can be connected to two low-voltage devices 103, 105 (not shown; Figure 2 Only the plug-in connection 112 of the low-voltage devices 103 , 104 , 105 , 106 , 107 is shown.

[0129] Furthermore, as a further difference, it is noticeable that the three low-pressure devices 104, 106, 107 (see FIG. Figure 1 ) can be connected to only two low-voltage devices 104, 106 (not shown; in Figure 2 Only the plug-in connection 112 of the low-voltage devices 103 , 104 , 105 , 106 , 107 is shown.

[0130] While the first connecting device 2 has different contacts 2A, 2B, the second and third connecting devices 3 , 4 can be electrically connected to the power electronics 110 (not shown) of the vehicle drive 100 by means of these contacts.

[0131] Of the various contacts 2A, 2B, two contacts are mentioned as an example (see Figure 2 ), at least one contact portion is electrically connected to the second connecting device 3 and at least one contact portion is electrically connected to the third connecting device 4.

[0132] Therefore, the first and third low-pressure devices 103, 105 (in Figure 2 107) can be connected to the second connecting device 3, and the second and fourth low-voltage devices 104, 106 can be connected to the third connecting device 4. In this case, the low-voltage devices 103, 104, 105, 106 can be detachably contacted together or simultaneously via different contacts 2A, 2B of the first connecting device 2 with a single plug-in device 111 (not shown) of the power electronics 110 of the vehicle drive 100.

[0133] In this manner, a single low-voltage connecting device 1 is sufficient to bring together the low-voltage devices 103, 104, 105, 106 at the second and third connecting devices 3, 4 to the first connecting device 2, so that by means of a plug-in device 111 (not shown) of the power electronics 110 (not shown), all low-voltage devices 103, 104, 105, 106 can be contacted at once by being connected to the low-voltage connecting device 1. In this manner, the low-voltage devices of multiple electric machines can also be contacted simultaneously or jointly.

[0134] Furthermore, the second connection device 3 has a plurality of contacts (not shown) by means of which the first and third low-voltage devices 103, 105 can be releasably contacted with the low-voltage connection device 1. The third connection device 4 also has a plurality of contacts (not shown) by which the second and fourth low-voltage devices 104, 106 can be releasably contacted with the low-voltage connection device 1. Thus, in the event of maintenance, the low-voltage devices can be quickly and safely removed and reconnected. Consequently, installation and removal can be achieved more quickly and more simply.

[0135] In addition, compared to the first exemplary embodiment, the second exemplary embodiment has two receptacles 13 at the first end 10 of the housing 5 of the low-voltage connecting device 1 for plug-in connectors 112 (not shown) of the low-voltage devices 103, 105 of the vehicle drive 100. The second end 11 of the housing 5 of the low-voltage connecting device 1 likewise has two receptacles 14 for the plug-in connectors 112 of the low-voltage devices 104, 106, 107 of the vehicle drive 100.

[0136] In this case, all receptacles 13 , 14 are designed as sockets or modular sockets for plug-in devices 112 of the low-voltage devices 103 , 104 , 105 , 106 , 107 .

[0137] Similarly, according to Figure 1 The first embodiment and Figure 2In the second embodiment, all receptacles 13, 14 have first locking devices 15, so that the plug-in devices 112 of the low-voltage devices 103, 104, 105, 106, 107 can be releasably fastened at the receptacles 13, 14. Here, the first locking devices 15 are designed as recesses for locking hooks.

[0138] Figure 3 A spatial view of an electric or hybrid vehicle drive 100 with a low-voltage connecting device 1 is shown, without a machine housing 108 but with a cover 114; instead, Figure 4 and 5 Show the basis Figure 3 3 shows a spatial view of an electric or hybrid vehicle drive 100 with a low-voltage connecting device 1 , but with a machine housing 108 .

[0139] On the contrary Figure 6 , a sectional view of an electric or hybrid vehicle drive 100 with a low-voltage connecting device 1 arranged on a machine housing 108 is shown.

[0140] under, Figures 4 to 6 Described collectively for simplicity.

[0141] Therefore, these figures show the same Figure 1 and 2 An electric or hybrid vehicle drive 100 is described with a low-voltage connecting device 1 .

[0142] In this case, the vehicle drive 100 has two electric machines 101 , 102 (not shown separately) and a power electronics system 110 having a plug-in device 111 , which is designed as a plug or modular plug and is connected to the first connecting device 2 .

[0143] The plug-in device 111 of the power electronic device 110 is at least Figure 6 Clearly visible in FIG. 1 is the first connecting device 2 which is connected to the low-voltage connecting device 1 in order to electrically connect the power electronics 110 to the low-voltage connecting device 1 .

[0144] Furthermore, the vehicle drive device 100 comprises a first low-pressure device 103 and a third low-pressure device 105 , which are connected to the second connecting device 3 ; and a second low-pressure device 104 and a fourth low-pressure connecting device 106 , which are connected to the third connecting device 4 .

[0145] The first and the third low-voltage connection 103 , 105 each have at least one mating contact, which contacts a contact of the second connecting device 3 .

[0146] The second and fourth low-voltage devices 104 , 106 also each have at least one mating contact, which contacts a contact of the third connecting device 4 .

[0147] The first and second low-pressure devices 103 , 104 are designed as temperature sensors, while the third and fourth low-pressure devices 105 , 106 are designed as rotor position sensors.

[0148] For example Figure 6 As shown, the plug-in connection 111 of the power electronics 110 is connected to the first connecting device 2, wherein the plug-in connection 111 of the power electronics 110 includes a plurality of mating contacts that contact contacts of the first connecting device 2. Therefore, each electric machine 101, 102, the temperature sensor, and the rotor position sensor are each connected to the power electronics 110 via only one single plug-in connection 111.

[0149] according to Figure 6 The plug-in connection 111 of the power electronics 110 has a seal 113, which rests sealingly against the machine housing 108 of the vehicle drive 100 and the plug-in connection 111 of the power electronics 110. In this way, a space in which, for example, oil for cooling and / or lubrication is located can be additionally sealed by means of the seal 113.

[0150] As mentioned and as in Figures 4 to 6 As shown in FIG, the vehicle drive device 100 has a machine housing 108. The machine housing 108 comprises an opening 109 for contacting the first connecting device 2.

[0151] In this case, two electric motors 101 , 102 are arranged in a machine housing 108 .

[0152] Furthermore, the low-voltage connecting device 1 is arranged in the machine housing 108 in such a way that the first connecting means 2 are in contact with the power electronics 110 via the opening 109 .

[0153] Furthermore, each plug-in device 112 of the low-voltage device 103, 104, 105, 106 has a second locking device 115, which is releasably locked or lockable with the first locking device 15 of the receptacle 13, 14 of the second or third connecting device 3, 4 (see Figure 1 and 2 ). In this case, the second locking device 115 is designed as a locking hook, which engages in the first locking device 15 designed as a recess.

[0154] Description of Reference Numerals

[0155] 1Low voltage connection equipment

[0156] 2First connecting device

[0157] 2A contact part

[0158] 2B contact part

[0159] 3 Second connecting device

[0160] 4Third connecting device

[0161] 5 Shell

[0162] 6 The first section

[0163] 7 Second Section

[0164] 8. First seal

[0165] 9 Second seal

[0166] 10 First end

[0167] 11 Second end

[0168] 12 Holding device

[0169] 13. Accommodation

[0170] 14 Accommodation

[0171] 15 First locking device

[0172] 100 electric or hybrid vehicle drive systems

[0173] 101 First Motor

[0174] 102 Second Motor

[0175] 103 First Low-Pressure Device

[0176] 104 Second low-pressure device

[0177] 105 The third low-voltage device

[0178] 106 Fourth low-voltage device

[0179] 107 Fifth low-voltage device

[0180] 108 machine housing

[0181] 109 Opening

[0182] 110 Power Electronics

[0183] 111 Plug-in device for power electronic device

[0184] 112 Plug-in devices for low-voltage devices

[0185] 113 seals

[0186] 114 Cover

[0187] 115 Second locking device

Claims

1. A low-voltage connecting device (1) for an electric or hybrid vehicle drive (100) and for connecting a power electronic device (110) to at least one low-voltage device, the low-voltage connecting device comprising: - a first connection device (2) for connecting a power electronic device (110) of a vehicle drive (100), - a second connecting device (3) for connecting one or more low-voltage devices of a vehicle drive (100) so that the one or more low-voltage devices are releasably contacted with the low-voltage connecting device, It is characterized by: The low-voltage connecting device (1) includes a third connecting device (4) for connecting one or more low-voltage devices of a vehicle drive (100), so that the one or more low-voltage devices can be releasably contacted with the low-voltage connecting device, and so that at least one low-voltage device of the two motors (101, 102) of the vehicle drive (100) can be connected to the power electronic device (110) of the vehicle drive (100) by means of a single low-voltage connecting device (1).

2. The low-voltage connection device according to claim 1, characterized in that - wherein the first connecting device (2) has at least two contacts (2A, 2B), by means of which the second and third connecting devices (3, 4) can be electrically connected to a power electronic device (110) of a vehicle drive (100).

3. The low-voltage connection device according to claim 2, characterized in that: - wherein among the at least two contacts (2A, 2B), at least one contact is electrically connected to the second connecting device (3) and at least one contact is electrically connected to the third connecting device (4).

4. The low-voltage connection device according to claim 1, characterized in that - wherein the second connecting device (3) has at least one contact portion, by means of which the first and / or third low-voltage device can be releasably contacted with the low-voltage connecting device (1), and / or wherein the third connecting device (4) has at least one contact portion, by means of which the second and / or fourth and / or fifth low-voltage device can be releasably contacted with the low-voltage connecting device (1).

5. The low-voltage connection device according to any one of claims 1 to 4, characterized in that: - wherein the low-voltage connection device (1) has a rod-shaped or cylindrical housing (5), - wherein the housing (5) or the low-voltage connection device (1) has a shape similar to a screwdriver having a handle and a blade.

6. The low-voltage connection device according to claim 5, characterized in that - wherein the housing (5) or the low-voltage connecting device (1) has a first and a second section (6, 7), - wherein the first section (6) is similar to the shape of a screwdriver head and the second section (7) is similar to the shape of a screwdriver handle, - wherein the first section (6) comprises the second connecting means (3), and - wherein the second section (7) comprises the first and third connecting means (2, 4).

7. The low-voltage connection device according to any one of claims 1 to 4, characterized in that: The low-voltage connecting device (1) has two seals (8, 9) which seal the first connecting device (2) when interacting with a machine housing (108) of an electric machine (100), but allow access to the first connecting device (2).

8. The low-voltage connection device according to any one of claims 1 to 4, characterized in that: - wherein the second and / or third connecting device (3, 4) has at least one receptacle (13, 14), into which a plug-in device (112) of the low-voltage device can be releasably inserted, - wherein the at least one receptacle (13, 14) is designed as a socket for a plug-in device (112) of a low-voltage device.

9. The low-voltage connection device according to claim 8, characterized in that The socket is a modular socket.

10. The low-voltage connection device according to claim 8, characterized in that - wherein the at least one receptacle (13, 14) has a first locking device (15) so that a plug-in device (112) of the low-voltage device can be releasably fastened to the receptacle (13, 14), - wherein the first locking device (15) is designed as a recess for a locking hook.

11. An electric or hybrid vehicle drive device (100) comprising: - a low-voltage connection device (1) according to any one of claims 1 to 10 above, - two motors (101, 102), and - a power electronic device (110) having a plug-in device (111), which is designed as a plug and is connected to the first connecting device (2), - wherein the plug-in device (111) of the power electronic device (110) is connected to the first connecting device (2) of the low-voltage connecting device (1) in order to electrically connect the power electronic device (110) to the low-voltage connecting device (1).

12. The vehicle drive device according to claim 11, characterized in that: The plug is a modular plug.

13. The vehicle driving device according to claim 11, wherein: - wherein the vehicle drive (100) comprises a first low-pressure device and / or a third low-pressure device, - wherein the first and / or third low-voltage device is connected to the second connecting device (3), wherein the first and / or third low-pressure device is designed as a temperature sensor and / or a rotor position sensor.

14. The vehicle drive device according to any one of claims 11 to 13, characterized in that: - wherein the vehicle drive (100) has a second low-pressure device (104) and / or a fourth low-pressure device and / or a fifth low-pressure device, - wherein the second and / or fourth and / or fifth low-voltage device is connected to the third connecting device (4), wherein the second and / or fourth and / or fifth low-pressure device is designed as a temperature sensor and / or a rotor position sensor.

15. The vehicle drive device according to any one of claims 11 to 13, characterized in that: - wherein the plug-in connection (111) of the power electronic device (110) has at least one seal (113), which bears sealingly against the machine housing (108) of the vehicle drive (100) and the plug-in connection (111) of the power electronic device (110), - wherein the vehicle drive device (100) comprises a machine housing (108) having an opening (109) for contacting the first connecting device (2), and The low-voltage connecting device (1) is arranged in the machine housing (108) such that the first connecting device (2) is in contact with the power electronics (110) through the opening (109).

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