The invention relates to an electrical connection element for the electrical connection of two electrical components according to the preamble of the independent claim.
From the prior art, a plurality of electrical connection elements for connecting two electrical components are known. In this case, a first component is usually designed as a plug, which is inserted into a corresponding insertion opening of the second electrical component. In electric vehicles, the electrical contacting of a battery or an electric drive machine brings with it corresponding challenges, in particular if the electric drive machine is oil-cooled. In particular, such electrical connecting elements for high-voltage connections are known from the prior art, which connect two each dry-running electrical components. In this case, the electrical contact is particularly simple, since only for a corresponding power transmission in the interior of the electrical connection element and an electrical insulation must be ensured to the outside. Furthermore, from the prior art sealed interfaces are known which require a relatively large amount of space. In addition, it is difficult to integrate a corresponding sensor for measuring current in a sealed interface. Furthermore, the degree of sealing is sometimes low, so that the sealed interfaces only allow a seal against spray oil, but not against an oil sump. In addition, some sealed interfaces are not suitable for the direct mounting of power electronics.
From the DE 10 2016 216 933 A1
a plug for electrically contacting an electric motor is known, wherein the plug has a housing with a fastening means provided with the first boom and a further attachment means provided with second boom for attachment to a stator and a positioning means for positioning the plug on the stator. Furthermore, a temperature sensor for determining a temperature of the electric motor is provided.
The WO 2004/020814 A1
discloses a wire harness for the electrical connection of an injector to an engine control unit of an internal combustion engine. In this case, the injector is arranged in a cylinder head of the internal combustion engine and lapped by coolant or lubricant. In this case, the cable harness comprises a first portion and a second portion which are interconnected via a clamping support and a hood, wherein both the clamping support and the hood have means for self-locking.
In addition, from the WO 2006/077208 A1
a control module for a motor vehicle transmission known. The control module has a first housing part, on which a first circuit part is arranged. The control module further has a second housing part and a carrier, on which a flexible conductor foil is arranged. The conductor foil is connected to the circuit part in a housing interior located between the first and the second housing part. The conductor foil is further electrically connected outside of the housing interior with electrical components fixed to the carrier. In this case, a stack-shaped structure is provided, in which the carrier is arranged with a first side on a provided with the circuit part inside of the first housing part, the circuit part is arranged in a recess of the carrier, the flexible conductor foil on the side remote from the first housing part second Side of the carrier is arranged and the second housing part is placed on the flexible conductor foil.
The invention is now based on the object to propose an electrical connection element for the electrical connection of two electrical components, which overcomes the disadvantages known from the prior art and is inexpensive to manufacture and easy to assemble.
According to the invention, this object is achieved by an electrical connection element for electrically connecting a first electrical component to a second electrical component, wherein the first electrical component has a housing bush in which a first busbar is guided. In this case, it is provided that the housing bush has, on its end face facing the housing of the first electrical component, a first sealing element, with which the housing bushing is sealed off from the housing. It is further provided that the housing bushing is covered on its end face facing away from the housing by a cover, wherein between the cover and the housing bush, a second sealing element is arranged, with which the first busbar relative to the housing bush and the lid is sealed. In this case, the second sealing element is preferably designed as a circumferential seal made of an elastomer, which is received in a form-fitting manner in a groove on the end face of the housing bush facing away from the housing. By means of this sealing combination it is achieved that the housing bush is sealed in a liquid-tight manner with respect to the housing even when the plug is not plugged in, and thus leakage of a liquid coolant for the first electrical component is reliably prevented. In this case, the seal opposite to known from the prior art electrical interfaces increased Sealing degree, so that the housing socket is also suitable for use in an oil bath.
By the features listed in the dependent claims, advantageous improvements and developments of the electrical connection element specified in the independent claim are possible.
In a preferred embodiment of the invention, it is provided that the electrical connection element comprises a plug with a plug housing in which a second bus bar is arranged, wherein the second bus bar can be inserted into at least one plug opening of the housing socket. As a result, a highly integrated and extremely compact design of the electrical connection element is possible.
In a further preferred embodiment of the invention, it is provided that the plug housing has a fifth sealing element, in particular a peripheral seal, on its end face facing the housing of the first electrical component. As a result, an additional sealing of the plug-in area relative to the environment is possible, so that entry of dirt or liquid from the plug side is reliably prevented.
According to a preferred embodiment of the invention, it is provided that the connector housing is non-positively connected by means of at least one screw with the housing socket. Preferably, a further screw connection for mounting the socket in the housing of the first electrical component is provided. As a result, the tightness of the first electrical components is ensured even without a mounted connector housing. By a screw connection, a cost-effective and easy-to-install solution of the electrical connection element is possible. In this case, no additional sockets or other components must be mounted in the assembly, so that can save installation time and thus assembly costs.
For many applications, it is advantageous if a measuring unit for current measurement is arranged on the second busbar. By means of a measuring unit for measuring the current at the second busbar, it is possible to provide the required control processes with the current actual value and thus to enable effective current regulation. In this case, an arrangement on the second busbar of the plug with respect to an arrangement on the first busbar in the housing socket is advantageous because the second busbar is more accessible in the connector housing and a current anyway flows only when the first busbar and the second busbar are in contact ,
It is particularly preferred if the measuring unit is designed as a Hall sensor or as a measuring resistor. Hall sensors and measuring resistors are simple and cost-effective sensors for determining the current at the second busbar. In this case, both a Hall sensor and a measuring resistor, which is also referred to as a shunt, can be integrated to save space in the connector housing of the plug.
In an advantageous embodiment of the electrical connection element is provided that the first bus bar and the second bus bar each having a portion which are perpendicular to one of the housing of the first electrical components facing end face of the housing socket or the plug housing, wherein the portions of the first bus bar and the second busbar form a contact zone of the electrical connection element. By a vertical arrangement a particularly simple joining and connecting between the plug and the housing socket is possible. In particular, the risk of bending the busbars in the assembly is reduced.
It is particularly preferred if in the region of the contact zone, a pressing element, in particular a spring tongue, is provided, with which the portion of the second busbar is pressed against the portion of the first busbar. By a pressing the contact area between the first busbar and the second busbar is biased, whereby a higher security against lifting of one of the busbars and thereby impaired power transmission is given. Further, a latching mechanism may be provided on the clamping element in order to ensure a fully inserted plug tongue of the second bus bar locking the plug in this position.
In a further preferred embodiment of the electrical connection element it is provided that a plurality of mutually parallel busbars are provided on the housing bushing and on the plug. By several mutually parallel busbars additional functions can be realized. When using an electrical connecting element according to the invention in an alternating current, the different conductors can be realized by the different busbars. Furthermore, larger currents can be transmitted via a plurality of busbars, which are preferably arranged parallel to one another. Alternatively or additionally, it is possible that further information is transmitted via the corresponding busbars, so that project-related a suitable number of busbars and plug-in openings can be selected.
Particularly advantageous is an embodiment of the electrical connecting element, in which the first electrical component is lubricated by a liquid medium and the second electrical component is kept free of contact with a liquid medium. Due to the high sealing effect, the electrical connecting element according to the invention is particularly advantageous when an electrical component of liquid, in particular by an oil bath, is surrounded, in particular to cool this electrical component, and the second electrical component must be kept dry urgently.
In a preferred embodiment of the invention it is provided that the first electrical component is an electric drive motor of a motor vehicle and the second electrical component is a power electronics or a wiring harness of a motor vehicle. A preferred application for an inventive electrical connection element is the electrical interface between a preferably oil-cooled electric drive machine in a motor vehicle on the one hand and a power electronics or a wiring harness on the other side. In this case, a functionally reliable electrical connection can be realized by the electrical connection element.
The various embodiments of the invention mentioned in this application are, unless otherwise stated in the individual case, advantageously combinable with each other.
The invention will be explained below in embodiments with reference to the accompanying drawings. Show it:
- 1 A preferred embodiment of an electrical connection element according to the invention in a sectional view;
- 2 a housing socket of an electrical connecting element according to the invention in a front view of an end face and in a sectional view and
- 3 a connector of an electrical connection element according to the invention in several views and in a sectional view.
1 shows an electrical connection element 10 for electrical connection of a first electrical component 12 , in particular an electric drive motor 16 a motor vehicle with a second electrical component 14 , in particular a power electronics 18 or a wiring harness 20 , The electrical connection element 10 includes a housing book 24 which in a housing 22 the first electrical component 12 is arranged and via an opening in the housing 22 is electrically contactable. In the housing socket 24 is a first busbar 26 arranged, which is a first section 50 having, which with the first electrical component 12 can be associated and substantially parallel to the housing 22 the first electrical component 12 runs. The first busbar 26 also has a second section 52 which is perpendicular to the first section 50 and perpendicular to the housing 22 the first electrical component 12 runs. Between the first section 50 and the second section 52 the first busbar 26 is a bend radius 54 educated. The housing socket 24 points in the area of the second section 52 the first busbar 26 a recess 48 on. This is the second section 52 preferably on a first wall of the recess 48 on. It is at the first busbar 26 a pressing element 100 provided, which through the recess 48 in the housing socket 24 is guided and locked there.
The housing socket 24 has a first end face 28 on which the housing 22 the first electrical component 12 is facing. At the first end face 28 is a first sealing element 30 , Preferably, a circumferential seal made of an elastomer, arranged, with which the Gehäusebuche 24 liquid-tight against the housing 22 is sealed. The case book 24 also has one of the first end face 28 opposite second end face 32 on which with a lid 34 is closable. Between the lid 34 and the second end face 32 is a second sealing element 36 arranged. To a positive reception of the second sealing element 36 to allow is at the second end face 32 the housing socket 24 a first groove 40 provided, in which the second sealing element 36 is included. Further, on the lid 34 a corresponding groove for receiving the second sealing element 36 intended. In this case, the second sealing element 36 preferably formed as a circumferential sealing unit, which the first busbar relative to the second end face 32 the housing socket 24 and the lid 34 seals. To a corresponding positioning of the second sealing element 36 to enable is the groove 40 at the second end face 32 the housing socket 24 formed as a circumferential groove to the second sealing element 36 to record positively. Further, in the first end face 28 the housing socket 24 two threaded holes 44 . 46 introduced, with which a plug 70 by means of a screw connection with the housing socket 24 can be connected.
The electrical connection element 10 further includes a plug 70 , which is a plug housing 72 and a second busbar 78 having. In this case, the second busbar 78 by an insertion of the plug 70 in the housing socket 24 electrically with the first busbar 26 get connected. This is the second busbar 78 with a second section 82 which is perpendicular to the housing 22 runs, in a contact zone 56 at the first busbar 26 on. The concern of the two busbars 26 . 78 is by the contact pressure element 100 which supports the second section 82 the second busbar 78 in the contact zone 56 against the second section 52 the first busbar 26 pressed. The second busbar 78 also has a first section 80 for connection to a second electrical component 14 which is preferably perpendicular to the second section 82 the second busbar 78 runs. Between the first section 80 and the second section 82 the second busbar 78 is a bend radius 84 educated. At one of the housing 22 the first electrical component 12 facing end face 74 of the connector housing 72 is a third sealing element 76 , Preferably also a circumferential seal made of an elastomer provided, with which the plug housing 72 opposite the housing 22 the first electrical component 12 is sealed. Further, on the connector housing 72 a screw connection 38 provided over which the plug 70 into the threaded holes 42 . 58 the housing socket 24 is fixed. Furthermore, a screw connection 92 provided with which the housing socket 24 over the threaded holes 44 . 46 in the case 22 is fixed. As a result, a tightness of the housing socket 24 even without an inserted plug 70 ensured. After mounting the plug 70 is also the plug-in area itself sealed against the environment. At the plug 70 is also a measuring unit 86 for current measurement with inserted plug 70 intended. The measuring unit 86 is preferably as a Hall sensor 88 or as a measuring resistor (shunt) 90 designed and allows a compact design of the electrical connection element 10 ,
2 shows a front view (left) and a sectional view (right) of a housing socket 24 an electrical connecting element according to the invention 10 , At the first end 28 are three mutually parallel insertion openings 60 . 62 . 64 formed, in which appropriate tabs 98 at the ends of the busbars 78 . 94 . 96 of the plug 70 can be inserted. It can also be seen that the housing socket 24 next to the first busbar 26 a third busbar 66 and a fifth busbar 68 which is parallel to the first busbar 26 are arranged.
In 3 is a plug 70 in a front view (top), two side views (left and center) and in a sectional view (right) shown. The plug 70 has three parallel busbars 78 . 94 . 96 on which in the plug openings 60 . 62 . 64 the housing socket 24 are pluggable. Furthermore, in 3 to realize that for each of the power rails 78 . 94 . 96 a separate measuring unit 86 is provided to each busbar 78 . 94 . 96 independently to be able to carry out a measurement of the electric current.
In the 1 to 3 is a three-pole variant of an electrical connection element according to the invention 10 shown in a version with a plug contact. The seal over the sealing elements 30 . 36 . 38 . 58 is designed so that when mounted housing socket 24 a leak on the first electrical component 12 facing side of the housing 22 even without a plug connection with the plug 70 is guaranteed. After mounting the plug 70 is also the plug-in area 48 . 56 even sealed against the environment. Instead of a plug contact between the busbars 26 . 66 . 68 . 78 . 94 . 96 is also an electrical connection via a terminal contact or a spring contact possible. The plug-in contact appears in the first approach to be particularly advantageous because it can be implemented easier than a terminal contact or a spring contact. Alternatively to the illustrated form of a three-pole electrical connection element 10 Embodiments with more or fewer contacts are also possible. The number of contacts is application-dependent and can be adjusted according to the functions and currents to be fulfilled.
A current measurement is via a directly to the power rails 78 . 94 . 96 of the plug 70 connected measuring unit 86 realized. This measuring unit 86 is preferably via a Hall sensor 88 or by a measuring resistor 90 , which is also referred to as a shunt, feasible. The measuring unit 86 can via a signal interface to a control board of the second electrical component 14 , in particular to a control board of the power electronics 18 , feature.
In summary, it can be stated that an inventive electrical connection element 10 characterized by a highly integrated and therefore extremely compact design, the current sensors 86 . 88 . 90 in the plug 70 is integrated. The electrical connection element 10 is not only sealed against oil mist or spray oil, but has an increased tightness, so that the electrical connection element 10 suitable for use under oil. The electrical contacting of the busbars 28 . 66 . 68 . 78 . 94 . 96 takes place when joining plugs 70 and housing socket 24 , where by the screw connection 92 a high tightness and a stable fixation of plug 70 and housing socket 24 is reached.
LIST OF REFERENCE NUMBERS
- Interface Contact
- first electrical component
- second electrical component
- electric drive motor
- power electronics
- housing socket
- first busbar
- first sealing element
- second sealing element
- first groove
- threaded hole
- first tapped hole
- second threaded hole
- first section of the first busbar
- second section of the first busbar
- bending radius
- contact zone
- threaded hole
- first plug-in opening
- second plug-in opening
- third plug-in opening
- third busbar
- fifth busbar
- plug housing
- third sealing element
- second busbar
- first section
- second part
- bending radius
- measuring unit
- Hall sensor
- measuring resistor
- fourth busbar
- sixth busbar
QUOTES INCLUDE IN THE DESCRIPTION
This list of the documents listed by the applicant has been 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.
Cited patent literature
- DE 102016216933 A1 
- WO 2004/020814 A1 
- WO 2006/077208 A1