WO2022243141A1

WO2022243141A1 - Stator for an electrical machine and electrical machine

Info

Publication number: WO2022243141A1
Application number: PCT/EP2022/062864
Authority: WO
Inventors: Joachim Hein; Julian Schad; Tobias Schrenk; Sven Ludsteck
Original assignee: Zf Friedrichshafen Ag
Priority date: 2021-05-17
Filing date: 2022-05-12
Publication date: 2022-11-24
Also published as: DE102021204922A1

Abstract

The invention relates to a stator (104) for an electrical machine (102), wherein the stator (104) comprises a coil unit for generating a magnetic field and a connection unit for activating the coil unit, the connection unit being connected to the coil unit. Furthermore, the stator (104) comprises a temperature sensor for detecting a temperature of the coil unit, a retaining element which is connected to the connection unit and a plug which is connected to the temperature sensor via a connecting cable. The plug is floatingly mounted in the retaining element in order to simplify a plug connection between the plug and an outer plug through an opening in a housing (108) of the electrical machine (102).

Description

Stator for an electric machine and electric machine

The present invention relates to a stator for an electric machine and an electric machine for a vehicle.

Electrical machines, such as electric motors, are used, for example, in the automotive sector. For example, such an electric machine can be designed as a vehicle drive or drive individual vehicle components.

Against this background, the present invention provides an improved stator for an electric machine and an improved electric machine according to the independent claims. Advantageous configurations result from the subclaims and the following description.

The approach presented can facilitate electrical contacting of a sensor system arranged within the electrical machine.

A stator for the electrical machine includes a coil unit for generating a magnetic field and a circuit unit for controlling the coil unit, the circuit unit being connected to the coil unit. Furthermore, the stator includes a temperature sensor for detecting a temperature of the coil unit, a holding element which is connected to the interconnection unit, and a plug which is connected to the temperature sensor via a connecting cable. The plug is floatingly mounted in the holding element in order to simplify a plug connection between the plug and an external plug through a through-opening of a housing of the electrical machine.

The electrical machine can be implemented as an electric motor or generator and can include the stator and a rotor surrounded by the housing. The coil unit can have a plurality of coils arranged in a ring for forming electromagnets. The interconnection unit can control the flow of current through the coil unit. The switching unit can be fixed to the Coil unit to be attached. With the temperature sensor, for example, an impending overheating of the electrical machine can be detected. The plug arranged inside the housing when the electric machine is assembled can form an electrical interface to the external plug arranged at least partially outside the housing. For example, the connector can be used for data transmission and additionally or alternatively for providing an operating voltage for the temperature sensor. During assembly of the electric machine, the outer plug can be inserted into the through-opening from outside the housing and connected to the plug. The floating mounting of the plug in the holding element enables a balancing movement of the plug, through which the plug can be aligned with respect to the outer plug. For example, the stator is joined after the rotor by being let in between the rotor and the housing. Advantageously, the outer plug can be mounted quickly and securely on the plug which is arranged inside the housing after the rotor and stator have been joined. Due to the floating bearing, blind assembly can be simplified and tolerance compensation between the plug and the outer plug can be made possible. In addition, a high level of robustness during assembly and a high level of robustness against vibrations during operation can be achieved.

According to one embodiment, the holding element can have a receiving section and a contact section. The receiving portion may be shaped to floatingly receive the connector. In this way, the plug cannot be held rigidly but movably by the receiving section. The contact section can be shaped in order to lie against a wall of the interconnection unit. The contact section can be shaped as a rear wall of the holding element, for example. In this way, tilting of the holding element can be prevented. To store the plug floating, a foot of Ste ckers receiving dimensions of the receiving portion can be chosen larger than Außenab measurements of the foot of the plug. In this way, the plug cannot be held rigidly but movably by the receiving section. According to one embodiment, the receiving section can have two opposite side walls and a bottom surface connecting the side walls. Each of the side walls may have a connector receptacle for receiving the connector. A loose fixation of the plug can advantageously be achieved in this way. The optionally closed floor area can advantageously protect against sagging of cables in the direction of a rotor of the electric machine and thus prevent damage and malfunctions during operation and assembly.

According to one embodiment, the connector receptacle can be formed in a stepped, groove-like and additionally or alternatively in a pocket-like manner. In the case of a step-like formation, the plug receptacle can have a shoulder, in the case of a groove-like formation a slot which is open at least on one side, and in the case of a pocket-like formation a recess, for example a blind hole. In the case of a groove-like formation, a section of the foot of the plug can be pushed into the plug receptacle. If the shape is stepped, the foot of the plug can be placed on the plug receptacle. A pocket-like shape allows for example a hooking element of the plug to be plugged in. On the opposite side walls arranged connector receptacles can be shaped differently, for example, on one side like a groove and on the other hand purely step-like. The connector receptacle can have a clip, for example, with which a foot of the connector can be locked.

According to one embodiment, the plug can have at least one hooking element on each side for hooking the plug into the plug receptacle. Such a hooking element can be formed, for example, as a projection on a foot of the plug. The plug can be attached loosely to the plug receptacle using the hooking element.

A clear height of the connector receptacle can be greater than a thickness of the hook element. As a result, mobility of the connector in a first direction can be ensured. Additionally or alternatively, a width of the plug receptacle can be greater than a width of the hooking element. This allows one Mobility of the connector can be guaranteed in a second direction. Additionally or alternatively, a depth of the plug receptacle can be greater than a length of the hooking element. As a result, mobility of the connector in a third direction can be ensured.

According to one embodiment, the contact section of the holding element can have at least one opening. The opening can be designed to accommodate a retaining pin of the interconnection unit. The opening can be a through opening, for example a borehole. As a result, an exact positioning of the holding element can advantageously be made possible. The holding pin can advantageously be shaped as a cross mandrel.

According to one embodiment, the holding element can have a projection. The projection of the holding element, which can also be referred to as a plug holder, can be shaped in order to rest against a side surface of the interconnection unit. Furthermore, a balcony can be provided on the connection unit, which can act as a fulcrum and thus generate a torque, so that a shearing stress acting on a heat-staking pin for holding the holding element becomes a tensile stress. The projection can, for example, be aligned transversely to the contact section, advantageously at right angles to the contact section, so that the projection can contribute to further stabilization of the holding element. Optionally, the projection can have a plurality of ribs for guiding the connecting cable. The ribs can, for example, protrude from each other at regular intervals from the front. A cable duct can be formed through the ribs.

The temperature sensor can be integrated or can be integrated into the holding element. Before geous enough, assembly can be facilitated and a high measurement accuracy can be achieved.

According to one embodiment, the temperature sensor can have a detection section for detecting the temperature, a measuring pill arranged at the level of the detecting section, and a housing material enclosing the measuring pill exhibit. The housing material can have a smaller wall thickness in the area of the detection section than in an area bordering on the detection section. The measuring pill can be implemented, for example, as a sensor element that detects the temperature. The wall thickness of the housing material can vary in order to advantageously obtain a precise measurement result.

Furthermore, the coil unit can have at least one insulating body and at least one coil wound around the insulating body. The insulator can have an off recess for the temperature sensor. The insulating body can advantageously be shaped in order to be able to shield the temperature sensor from a magnetic field emanating from the coil unit. This can prevent a measurement result from the temperature sensor from being falsified. Advantageously, the temperature sensor can be inserted, clipped or snapped into the insulator.

According to one embodiment, the temperature sensor and the insulating body can be resiliently connected to one another. Tolerance compensation can advantageously take place and at the same time a permanent stop between the winding and the temperature sensor can be achieved.

Furthermore, the temperature sensor can have a pretensioning element at a free end. This prevents the temperature sensor from slipping and ensures that it is fixed in a desired position. Additionally or alternatively, the temperature sensor can have at least one latching hook. This allows a latching function to be implemented.

According to one embodiment, the holding element can be screwed, glued, caulked or pressed to the interconnection unit. Advantageously, it can thereby be ensured and guaranteed that the retaining element is permanently connected to the interconnection unit.

An electrical machine is also presented, which has a stator in one of the variants mentioned before, a rotor and a housing which contains the rotor and surrounds the stator, with the housing having the through-opening for passing through the

Has outer connector.

The housing can advantageously be designed to protect the electrical machine from environmental influences.

The invention is explained in more detail by way of example with reference to the attached drawings.

Show it:

1 shows a schematic representation of a vehicle with an electric machine according to an exemplary embodiment;

2 shows a perspective view of a stator in a housing according to an exemplary embodiment;

3 shows a perspective view of a section of a stator that includes a plug according to an exemplary embodiment;

4 shows a perspective illustration of a holding element of a stator according to an exemplary embodiment;

FIG. 5 shows a schematic cross-sectional illustration of a stator according to one exemplary embodiment;

6 shows a schematic cross-sectional illustration of a stator with a plug and an outer plug according to an exemplary embodiment with an outer plug;

7 shows a perspective illustration of a stator with a plug and an outer plug according to an exemplary embodiment with an outer plug;

8 shows a schematic front view of a stator with a plug and an external plug according to an exemplary embodiment with an external plug;

Fig. 9 is a schematic representation of a stator according to an exemplary embodiment;

10 is a perspective view of a holding element according to an embodiment;

11 is a perspective view of a holding element according to an embodiment; FIG. 12 shows a schematic front illustration of a holding element according to one exemplary embodiment;

13 shows a schematic representation of a holding element according to an exemplary embodiment;

14 shows a schematic side view of a holding element according to one exemplary embodiment;

15 shows a schematic cross-sectional representation of a holding element with a plug according to an embodiment;

Fig. 16 is a perspective view of a connector according to an embodiment example;

Fig. 17 is a schematic representation of a connector according to a game Ausführungsbei;

18 is a perspective view of a temperature sensor according to an exemplary embodiment; and

19 shows a schematic representation of a temperature sensor in the assembled state according to an exemplary embodiment.

In the following description of preferred exemplary embodiments of the present invention, the same or similar reference symbols are used for the elements which are shown in the various figures and have a similar effect, with a repeated description of these elements being dispensed with.

Fig. 1 shows a perspective view of a vehicle 100 with an electrical machine's 102 according to an embodiment. According to this exemplary embodiment, the vehicle 100 is implemented as a two-lane vehicle, such as a passenger car or a truck. The electric machine 102 is implemented, for example, as an electric drive motor of the vehicle 100 . The electrical machine 102 has a stator 104, a rotor 106 and a housing 108 in accordance with known electrical machines. The rotor 106 can be driven using a coil unit of the stator 104 . The housing 108 is designed to protect the rotor 106 and the stator 104 from external influences. The housing 108 surrounds the stator 104 and the rotor 106 and has a through opening for the passage of an external plug on the is coupled to a connector arranged on the stator 104 when the electric machine 102 is in the operational state.

Fig. 2 shows a perspective view of a stator 104 according to an exemplary embodiment. The stator 104 is, for example, part of an electrical machine as was described in FIG. 1 . The stator 104 comprises an annular coil unit 200 for generating a magnetic field and an interconnection unit 201 , shown somewhat hidden in FIG. 2 , for controlling the coil unit 200 . Furthermore, the stator 104 has a temperature sensor for detecting a temperature of the coil unit 200, a holding element 202 as part of a connector interface and a connector 204 which is connected to the temperature sensor via a connecting cable. The plug 204 is mounted in a floating manner in the holding element 202 . This facilitates a plug connection between the plug 204 and an external plug 206.

According to this embodiment, the coil units 200 includes a plurality of coils spaced apart from each other at regular intervals. The coil units 200 are surrounded by a stator support 208 of the stator 104 .

The stator carrier 208 has a cylindrical side wall and a rear wall with a receiving opening 212 for passing through a rotor shaft of the rotor. Furthermore, the stator support 208 has a through-opening for the outer plug 206 .

The holding element 202 implements a holder for the plug 204 on the wiring unit 201, which is also referred to as a wiring arrangement. The holding element 202 simplifies the assembly of the plug 204 with the outer plug 206 . For this purpose, the plug 204 is floating on the holding element 202 . The holding element 202, also referred to as a carrier, is mounted on the interconnection unit 201 according to one exemplary embodiment. FIG. 3 shows a perspective illustration of a section of a stator 104 comprising a plug 204 according to an exemplary embodiment. The stator 104 shown here corresponds, for example, to the stator 104 described in Fig. 2.

According to this exemplary embodiment, the holding element 202 in which the plug 204 is mounted in a floating manner, has a receiving section 300, a contact section 302 and, optionally, a projection 304. The contact portion 302 is shaped to rest against a wall 306 of the wiring unit 201 . Furthermore, the projection 304 is formed to abut against a side face 308 of the wiring unit 201 . The boss 304 has a heat stake pin 310 shown in the staked condition. According to an alternative exemplary embodiment, the projection 304 additionally or alternatively has a plurality of ribs 312 which are designed to guide a connecting cable 311 . Optionally, the ribs 312 form a cable duct for the connection cable 311 .

According to this exemplary embodiment, the receiving section 300 has two opposite side walls 314, 315 and a closed bottom surface 316 connecting the side walls 314, 315. Each of the side walls 314, 315 has at least one connector receptacle 318 for receiving the connector 204. According to this exemplary embodiment, the plug receptacle 318 is designed in a step-like manner, but can alternatively also be shaped like a groove and/or pocket.

According to this exemplary embodiment, the plug 204 itself has at least one hooking element 320 for holding the plug 204 in the receiving section 300 . To ensure the floating mounting of the plug 204, the at least one hooking element 320 has a smaller width and a smaller length than the plug receptacle 318.

According to one exemplary embodiment, the contact section 302 of the holding element 202 has at least one opening 322 which is designed to accommodate a holding pin 324 of the interconnection unit 201 . The holding pin 324 is formed, for example, as a cross mandrel. According to one exemplary embodiment, the holding element 202 has the projection 304 for radial support. This in turn only optionally has three projecting ribs. Retaining pins 324, such as cross domes, are arranged on the interconnection unit 201 for tangential support.

A form-fitting connection of holding element 202 and interconnection device 201 is achieved, for example, by a hot-molded plastic pin, which is provided, for example, by interconnection unit 201, also referred to as an interconnection device. In addition, a ridge 328 that reduces shear of the heatstake pin 326 provides a pivot point. The pivot point created in turn ensures that the heat staking pin 326 is subjected to a tensile load. A non-caulked heat staking pin 326, an optional snap hook or clip and the retaining pins 324 also ensure improved assembly, possibly also blind assembly, of the retaining element 202 on the interconnection unit 201. In addition, according to one exemplary embodiment, a snap hook or clip is provided on the retaining element 202, which Retaining element 202 axially and outwardly si chert. According to this embodiment, the holding member 202 is secured in its posi tion. The support member 202 is optionally plated with metal.

In an alternative exemplary embodiment, the holding element 202 has a cable guide that leads from the coil unit to the plug 204 in an S-shape through protruding ribs. In such a case, corresponding ribs are arranged, for example, transversely to an extension direction of the projection 304 .

The holding element 202, which is also referred to as a plug holder, prevents sagging of the connecting cable 311 when mounted in the direction of the rotor due to its closed geometry on the bottom surface 316. This prevents the connection cable 311 from colliding when the stator is assembled. The stator 104 is embedded as the last assembly between the rotor and the housing. The bottom surface 316 of the holding element 202, which is also referred to as a holder, prevents the connecting cable 311 from being damaged or crushed during assembly and during operation. According to alternative exemplary embodiments, the retaining element 202 is glued, screwed or injection molded onto the interconnection unit 201 , or welded or pressed to the interconnection unit 201 . Also optionally, the holding element 202 has an injected metal chamber.

According to this exemplary embodiment, the temperature sensor is arranged outside of the holding element 202 . Alternatively, the temperature sensor is integrated or can be integrated into the holding element 202, so that it can measure a temperature of the coil unit 200 on a connecting lug, for example.

FIG. 4 shows an illustration of a holding element 202 of a stator 104 according to an exemplary embodiment. The holding element 202 corresponds, for example, to the stator 104 described with reference to Fig. 3.

A plug foot of plug 204 is formed by a plug surface 400 with hooking elements 320, 420 projecting beyond a body of plug 204 on both sides.

The receiving section 300 of the holding element 202 has two opposite stepped plug receptacles 318, by which the hooking elements 320, 420 are received. The connector receptacles 318 and the hooking elements 320, 420 are shaped in such a way that the connector 204 is mounted in a floating manner.

FIG. 5 shows a schematic cross-sectional illustration of a stator 104 according to an exemplary embodiment. The stator 104 shown here corresponds or is at least similar to the stator 104 described in one of FIGS.

According to this exemplary embodiment, holding element 202 is fixed to interconnection unit 201 . According to this exemplary embodiment, the coil unit 200 is arranged adjacent to the interconnection unit 201 . The coil unit has an insulating body 504 and a coil 506 wound around the insulating body 504 . The insulating body 504 has a recess 508 for a temperature sensor 510 on. This means that the temperature sensor 510 according to this exemplary embodiment is plugged into the insulating body 504, clipped in or snapped in, for example. Furthermore, optionally, the temperature sensor 510 and the insulating body 504 are connected to one another in a spring-loaded manner in order, for example, to compensate for tolerances that occur and to permanently ensure a mechanical stop of the temperature sensor 510 .

The temperature sensor 510 is connected to the plug 204 by means of the connecting cable 311 . The connecting cable 311 is only optionally routed in a guide channel 512 or protective tube in sections.

According to one exemplary embodiment, the temperature sensor 510 has a detection section 514 for detecting the temperature, a measuring pill 516 arranged at the level of the detection section 514 and a housing material 518 enclosing the measuring pill 516 . The housing material 518 in turn has a smaller wall thickness in the area of the detection section 514 than in an area adjoining the detection section 514 . According to one exemplary embodiment, the temperature sensor 510 has a prestressing element 522 at a free end 520, which is also referred to as a prestressing lug. This prevents the temperature sensor 510 from slipping, for example, and ensures that the temperature sensor 510 is clearly in contact with the wound coil 506 .

In other words, enlarging the contact surface between the temperature sensor 510 in the area of the measuring pill 516 and positioning it centrally therein results in an optimized contact area in which heat transport from the coil to the temperature sensor 510 is optimized. At least two wires are contacted. To compensate for tolerances and to press measuring element 516 against the winding of coil 506 , insulating body 504 has a bevel in the direction of an end region of temperature sensor 510 at free end 520 . A resilient member is formed in an area between the biasing member 522 and the detection portion 514 to bias the temperature sensor 510 toward the coil 506 . This ensures a permanent mechanical stop of the measuring pill 516 as well as a fixation in the radial direction. In addition, the the insulating body 506 has the recess 508 which accommodates the temperature sensor 510, with a clip function ensuring that the temperature sensor 510 latches onto the insulating body 504 in the circumferential direction. For the radial fixation or positioning of the temperature sensor 510, an end stop in the direction of the insulating body 504 is provided on the temperature sensor 510.

The spring element and the clip function together with the radial stop ensure additional stability of the temperature sensor 510, for example with regard to vibrations or thermal expansion.

The shape of the temperature sensor 510 thus enables a sufficient contact surface. In addition, permanent abutment of the metering pill 516 to the wires of the coil is actively provided. Furthermore, a tolerance equalization between sensor and coil is achieved, which meets the high reproducibility requirements of the connection in order to optimally use the throttling, the so-called derating, of the electrical machine.

FIG. 6 shows a schematic cross-sectional illustration of a stator 104 according to an exemplary embodiment. The stator 104 is arranged in a housing 108 . The stator 104 shown here corresponds, for example, to the stator 104 described in FIG. 5. FIG. 6 differs from FIG. The outer plug 206 is guided through a through-opening 604 in the housing 108 of the electric machine and is coupled to the plug 204 . A sealing ring is provided within the through-opening 604 in order to seal a gap between the outer connector 206 and the housing 108 in the region of the through-opening 604 .

The outer connector 206 has an outside and inside the hous ses 108 arranged section. The section arranged outside of the housing 108 has a greater width than the diameter of the through-opening 604 purely by way of example. The section arranged within the housing 108 is mechanically and electrically contacted with the connector 204 . Fig. 7 shows a perspective view of a stator 104 with a Ste cker 204 and an outer connector 206 according to an embodiment. The stator 104 shown here corresponds to the stator 104 described in FIG. 6. Only the perspective of the illustration differs.

FIG. 8 shows a schematic front view of a stator 104 with a plug 204 and an external plug 206 according to an exemplary embodiment. The stator 104 shown here corresponds, for example, to the stator 104 shown in one of Figures 6 to 7.

Fig. 9 shows a schematic representation of a stator 104 according to an exemplary embodiment. The stator 104 shown here corresponds, for example, to the stator 104 shown in one of FIGS. 3 to 5 and can be implemented in an electrical machine, as was described in FIG. 1, for example. According to this exemplary embodiment, the stator 104 is only shown from above.

The connector 204 has, according to this embodiment, three Einhakele elements 320, 420, with which the connector 204 men floating in the connector receptacles 318 of the side walls 314, 315 of the holding element 202 is fixed.

According to this exemplary embodiment, the plug 204 has a first hooking element 320 on its plug foot on a first side and two second hooking elements 420 on an opposite side. The first hooking element 320 on the first side is arranged centrally and is wider than the second hooking elements 420 arranged next to one another on the second side.

10 shows a perspective view of a holding element 202 according to an exemplary embodiment. The holding element 202 shown here corresponds, for example, to the holding element 202 described in one of Figures 2 to 9.

Here, too, the holding element 202 has the receiving section 300 for the plug. The receiving portion has the two opposite one another Side walls 314, 315 with bottom surface 316 therebetween. The contact section 302 of the holding element 202 forms a rear wall of the receiving section. The bottom surface 316 and the contact portion 302 and the Bodenflä surface 316 and the side walls 314, 315 are aligned perpendicular to each other according to this embodiment.

According to this exemplary embodiment, the side walls 314, 315 are formed in a stepped manner in order to form a shoulder on which the plug can be placed. The two paragraphs are part of the connector receptacles 318 for the Ste cker. According to this exemplary embodiment, a first side wall 314 of the side walls 314, 315 has a retaining clip 1000 with an exemplary trapezoidal cross-section. In this way, the first hooking element of the plug can be clipped into the holding element 202 when the plug is inserted.

According to one exemplary embodiment, the contact section 302 of the holding element 202 has at least the opening 322, which is designed to accommodate a holding pin of the interconnection unit. Furthermore, the holding element 202 optionally has a web opening 1002, which is designed to accommodate a web of the interconnection unit, for example. The web is formed in order to stabilize the holding element 202 in its position. According to this exemplary embodiment, the contact section 302 also has a fixing opening 1004 which is designed, for example, to accommodate a fixing element, for example a heat-staking pin.

As in at least one of FIGS. 2 to 9, the holding element 202 shown here optionally has the projection 304. According to this exemplary embodiment, the projection 304 is aligned at right angles to the contact section 302 .

Optionally, the receiving section 300 has at least one support rib 1006, here two support ribs 1006 arranged parallel to one another, which are triangular in shape. A longitudinal side 1008 of the support ribs 1006 is arranged on the bottom surface 316 of the holding element 202 . When the connector is assembled, the support ribs 1006 are below the connector. FIG. 11 shows a further perspective illustration of the retaining element 202 shown in FIG. 10 according to an exemplary embodiment. The plug receptacle 318 on the second side wall 315 can be seen from the representation rotated relative to FIG. 10 . In contrast to the first side wall 314 with the retaining clip 1000, the connector receptacle 318 of the second side wall 315 has at least one, here by way of example two pockets 1100 which are shaped to each accommodate a second hooking element of the connector. The pockets 1100 are shaped in such a way that a second hooking element can be pushed into the pockets 1100 when the plug is inserted into the holding element 202 . For this purpose, the pockets 1100 are shaped as recesses in the second side wall 315 . According to one exemplary embodiment, a bottom of the pockets 1100 is arranged at the level of the shoulder of the stepped second side wall 315 .

FIG. 12 shows a schematic front view of a holding element 202 according to an exemplary embodiment. The holding element 202 corresponds to the holding element 202 described in one of FIGS. 10 to 11, with only the representation perspective differing. Optionally, the holding element 202 has a bevel 1202 at the bottom of the first side wall 314 . Optionally, the bottom surface 316 is curved in order to have sufficient assembly clearance according to the outer diameter of the rotor, corresponding to the inner diameter of the interconnection unit.

13 shows a schematic representation of a holding element 202 according to an exemplary embodiment. The holding element 202 shown here corresponds to the holding element 202 described in one of FIGS. 10 to 12, which is only shown in plan according to this exemplary embodiment.

FIG. 14 shows a schematic side view of a holding element 202 according to an embodiment. The holding element 202 shown here corresponds to the holding element 202 described in one of FIGS. 10 to 13, which is only shown from the side according to this exemplary embodiment. FIG. 15 shows a schematic cross-sectional illustration of a holding element 202 with a plug 204 according to an exemplary embodiment. The holding element 202 shown here corresponds to the holding element 202 described in one of FIGS. 10 to 14. The plug 204 corresponds, for example, to the plug 204 described in one of FIGS. The hooking elements 320, 420 represent nose-like extensions on the plug base of the plug 204.

According to this exemplary embodiment, the pockets 1100 have larger dimensions than the second hooking elements 420 . The first hooking element 320 is accommodated in a further pocket 1500 in the first side wall 314, corresponding to the pockets 1100, which in turn has larger dimensions than the first hooking element 320. As a result, the plug 204 is mounted in a floating manner.

In order to allow movement of the connector in an x-direction, the Ta's 1100 each have a width that is greater than a width of the individual second hooking elements 420. In addition, the additional pocket 1500 has a width that is greater than a width of the first hooking element 320. The movement of the plug in the x-direction is limited by the side walls of the pockets 1100, 1500.

In order to additionally or alternatively enable movement of the connector in a y-direction, the pockets 1100 each have a depth that is greater than a length of the individual second hooking elements 420. In addition, the additional pocket 1500 has a depth that is greater than a length of the first hooking element 320. The movement of the plug in the y-direction is limited by the rear walls of the pockets 1100, 1500.

In order to additionally or alternatively allow the connector to move in a z-direction, the pockets 1100 each have a height that is greater than a height of the individual second hooking elements 420. In addition, a distance between a bottom of the additional pocket 1500 and an underside of the retaining clip 1000 greater than the height of the first hooking element 320. The movement of the connector in the z-direction through the top walls of the pockets 1100 and the underside of the retaining clip 1000.

According to one exemplary embodiment, the plug 204 is inserted into the retaining element 202 by first inserting the two second hooking elements 420 into the pockets 1100 by means of a pivoting movement and then pressing the first hooking element 320 against the retaining clip 1000 in order to deflect it briefly so that the first hooking element 320 can be guided past the retaining clip 1000 into the further pocket 1500. Snapping back the retaining clip 1000 prevents the plug 204 from falling out.

According to one exemplary embodiment, the plug 204 has a field 1502 of connection points, via which the conductors of the connecting cable 311 can be contacted.

Fig. 16 shows a perspective view of a connector 204 according to an exemplary embodiment. The connector 204 shown here corresponds, for example, to the connector 204 described in one of Figures 2 to 9 or 15.

Fig. 17 shows a schematic representation of a connector 204 according to an exemplary embodiment. The connector 204 shown here corresponds, for example, to the connector 204 described in one of FIGS. 2 to 9 or 15 to 16. According to this exemplary embodiment, the connector 204 is only shown in plan view.

18 shows a perspective illustration of a temperature sensor 510 according to an embodiment. The temperature sensor 510 corresponds or is at least similar to the temperature sensor 510 described in one of FIGS. According to this exemplary embodiment, the temperature sensor 510 is designed to detect a temperature of the coil unit. The temperature sensor 510 is optionally implemented in a T-shape, with the free end 520 having the prestressing element 522 . At one of the free ends 522 At the opposite end, the temperature sensor 510 has a contacting head 1800 .

According to this exemplary embodiment, the detection section 514 is arranged between the contacting head 1800 and the free end 520 as part of the housing material 518 . The housing material 518 is connected to the contacting head 1800. The temperature sensor 510 has a latching hook 1802 on each of two sides adjacent to the housing material 518 . The latching hooks 1802 are designed, for example, to fix the temperature sensor together with the prestressing element 522 in a stator of the electrical machine in the assembled state.

According to this exemplary embodiment, the temperature sensor 510 has an injection point 1804 on its contact head 1800 .

According to one exemplary embodiment, the temperature sensor 510, which is also referred to as an NTC plug (Negative Temperature Coefficient Thermistor) or temperature sensor, has a thin-walled encapsulation in the direction of the coil/winding. For example, the measuring pill is overmoulded with a thin wall to improve heat transfer in the winding direction.

FIG. 19 shows a schematic representation of a temperature sensor 510 in the assembled state according to an exemplary embodiment. The temperature sensor 510 shown here corresponds, for example, to the temperature sensor 510 described in FIG. 18. According to this exemplary embodiment, the temperature sensor 510 is shown only in the assembled state. This means that one of the snap-in hooks 1802 is snapped into each flake niche 1900 . According to this exemplary embodiment, the flake niches 1900 are formed as part of the recess 508 of the insulating body 504 which holds the temperature sensor 510 . According to this exemplary embodiment, the detection area 514 of the temperature sensor 510 is wider than adjacent areas, such as the free end 520 of the temperature sensor 510. Vehicle electrical machine stator rotor housing coil unit interconnection unit holding element plug outer plug stator carrier center area receiving opening receiving section contact section projection wall side surface heat staking pin connecting cable ribs first side wall second side wall bottom surface plug receptacle hooking element opening retaining pin heat staking pin 28 bar 00 connector surface 20 hooking elements 04 insulating body 06 coil 08 recess 10 temperature sensor 12 guide channel 14 detection area 16 measuring pill 18 housing material

520 free end

522 biasing element

604 through hole

1000 retaining clip

1002 web opening

1004 fixing hole

1006 support rib

1008 long side

1100 bag

1202 oblique

1502 field of connections

1800 contacting head

1802 latch hook

1804 injection point

1900 hook niches

Claims

patent claims

First stator (104) for an electrical machine (102), the stator (104) having the following features: a coil unit (200) for generating a magnetic field; a switching unit (201) for driving the coil unit (200), wherein the

Interconnection unit (201) is connected to the coil unit (200); a temperature sensor (510) for detecting a temperature of the coil unit

(200); a holding member (202) connected to the wiring unit (201); and a plug (204) which is connected to the temperature sensor (510) via a connecting cable (311), the plug (204) being floating in the holding element (202) in order to form a plug-in connection between the plug (204) and a To simplify external plug (206) through a through-opening (604) of a housing (108) of the electrical machine (102).

2. Stator (104) according to claim 1, wherein the holding element (202) has a receiving portion (300) and a contact portion (302), wherein the receiving portion (300) is formed to accommodate the plug (204) floating and wherein the contact portion (302) is shaped to abut against a wall (306) of the switching unit (201).

3. Stator (104) according to claim 2, wherein the receiving section (300) has two opposite side walls (314, 315) and a bottom surface (316) connecting the side walls (314, 315), each of the side walls (314, 315 ) has at least one plug receptacle (318) for receiving the plug (204).

4. Stator (104) according to any one of claims 2 to 3, wherein the at least one plug receptacle (318) is formed in a step-like and/or groove-like and/or pocket-like manner.

5. stator (104) according to any one of claims 2 to 4, wherein the plug (204) at least one hooking element (320; 420) for hooking the plug (204) in the Ste ckeraufnahme (318).

6. Stator (104) according to claim 5, wherein a clear height of the connector receptacle (318) is greater than a thickness of the hooking element (320; 420) in order to ensure that the connector (204) can move in a first direction, and/ or a width of the plug receptacle (318) is greater than a width of the hooking element (320; 420) in order to ensure mobility of the plug (204) in a second direction, and/or a depth of the plug receptacle (318) is greater than a length of the hooking element (320; 420) in order to ensure mobility of the plug (204) in a third direction.

7. Stator (104) according to one of claims 2 to 6, wherein the contact section (302) of the holding element (202) has at least one opening (322) which is designed to receive a holding pin (324) of the interconnection unit (201). .

8. Stator (104) according to one of the preceding claims, wherein the holding element (202) has a projection (304) which is shaped to rest on a side surface (308) of the interconnection unit (201), the projection (304 ) has a plurality of ribs (312) for guiding the connection cable (311).

9. stator (104) according to any one of the preceding claims, wherein the temperature sensor (510) is integrated or can be integrated into the holding element (202).

10. Stator (104) according to one of the preceding claims, wherein the temperature sensor (510) has a detection section (514) for detecting the temperature, a level of the detection section (514) arranged measuring pill (516) and the measuring pill (516) enclosing Housing material (518), wherein the Ge housing material (518) in the area of the detection section (514) has a smaller wall thickness than in one of the detection section (514) adjacent to the area.

11. Stator (104) according to any one of the preceding claims, wherein the coil unit (200) has an insulating body (504) and around the insulating body (504) wound Coil (506), wherein the insulating body (504) has a recess (508) for the temperature sensor (510).

12. Stator (104) according to claim 11, wherein the temperature sensor (510) and the insulating body (504) are resiliently connected to one another.

13. Stator (104) according to one of the preceding claims, wherein the temperature sensor (510) has a prestressing element (522) at a free end (520) and/or wherein the temperature sensor (510) has at least one latching hook (1802).

14. Stator (104) according to any one of the preceding claims, wherein the Hal teelement (202) is screwed to the interconnection unit (201), glued, caulked or pressed.

15. Electrical machine (102) for a vehicle (100), the electrical machine having the following features: a stator (104) according to any one of the preceding claims; a rotor (106; and the housing (108) surrounding the rotor (106) and the stator (104), the housing (108) having the through hole (604) for passing through the outer plug (206).