Electric machine for a motor vehicle, in particular for a motor car, and motor vehicle, in particular motor car

Abstract

The invention relates to an electric machine (1) for a motor vehicle, comprising a housing (2) and a stator (5) which is arranged at least in part in the housing (2) and has a laminated core (8) and at least one winding (9) which has a winding head (W1) arranged on an axial end face (S1) of the laminated core (8) and in the housing (2). A channel element (10) is formed separately from the housing (2), separately from the winding (9) and separately from the laminated core (8) and surrounds the winding head (W1) over an angular range which extends at least partly over the peripheral direction of the electric machine (1).

Description

[0001] Electric machine for a motor vehicle, in particular for a car, and motor vehicle, in particular car

[0002] The invention relates to an electric machine for a motor vehicle, in particular for a car, according to the preamble of claim 1. Furthermore, the invention relates to a motor vehicle, in particular a car, with at least one such electric machine.

[0003] DE 102013204 766 D4 discloses an electric vehicle axle device comprising at least one vehicle axle on which vehicle wheels are arranged. EP 3 501 085 D1 discloses an electric machine as known, with a rotor having a hollow shaft. Furthermore, DE 102019 117 637 A1 discloses an arrangement for use in a motor vehicle. This arrangement comprises an electric machine with a rotor and a stator having stator windings. Stator cooling is provided by means of a first cooling circuit for cooling the stator by means of a first cooling medium flowing in the first cooling circuit, wherein the first cooling circuit is formed by a motor vehicle cooling circuit.

[0004] The object of the present invention is to create an electric machine for a motor vehicle and a motor vehicle with at least one such electric machine, so that a particularly advantageous temperature control, i.e. cooling and / or heating of the electric machine, can be achieved.

[0005] This problem is solved according to the invention by an electric machine with the features of claim 1 and by a motor vehicle with the features of claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.

[0006] A first aspect of the invention relates to an electric machine for a motor vehicle, also referred to simply as a vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state, has the electric machine and can be driven, in particular purely electrically, by means of the electric machine. Preferably, the electric machine is a high-voltage component whose electrical voltage, in particular its operating or nominal voltage, is preferably greater than 50 volts (V), in particular greater than 60 V, and then preferably several hundred volts. The electric machine has a housing and a stator arranged at least partially, in particular at least predominantly and thus at least to more than half or completely, within the housing.Preferably, the stator is designed separately from the housing and is at least rotationally fixed to the housing. Furthermore, the stator, preferably designed separately from the housing, is preferably connected to the housing in such a way that relative movements between the stator and the housing in the axial direction of the electric machine are prevented. Most preferably, the electric machine also has a rotor which can be driven by means of the stator, thereby allowing the electric machine to rotate about a machine axis of rotation relative to the stator and relative to the housing. The axial direction of the electric machine, whose radial direction is perpendicular to the axial direction of the electric machine, coincides with the machine axis of rotation. The electric machine can provide drive torques via the rotor for, in particular, purely electric propulsion of the motor vehicle.

[0007] The stator comprises a laminated core, which is preferably formed separately from the housing and connected to the housing in a rotationally fixed manner. Furthermore, the laminated core is preferably connected to the housing in such a way that relative movements between the housing and the laminated core in the axial direction of the electric machine, and thus along the machine's axis of rotation, are prevented. The stator also comprises at least one winding, also referred to as the stator winding. The winding is formed separately from the laminated core and is held by the laminated core and thus supported by it. The winding has at least one winding head, which is arranged on an axial end face of the laminated core. In particular, the winding head projects from the axial end face of the laminated core in the axial direction of the electric machine. Furthermore, the winding head is, in particular, arranged entirely within the housing.For example, the laminated core has at least one groove. Initial sections of the winding run within this groove. Secondary sections of the winding are arranged outside the groove and project from the axial end face in the direction of the electric machine, thus along the machine's axis of rotation, forming the winding head. To achieve particularly advantageous temperature control, i.e., heating and / or cooling of the electric machine, at least one channel element is provided, designed separately from the housing, the winding, and the laminated core, and formed as a solid body. This channel element is preferably inherently rigid and therefore dimensionally stable. The channel element is, for example, made of a metallic material or a plastic. Preferably, the channel element is formed in one piece.This means that the channel element is preferably not composed of several separately formed and connected parts, but rather the channel element is preferably a single piece, i.e. formed from a single piece, so that the channel element is preferably designed as a single-piece monoblock, i.e., integrally manufactured.

[0008] The channel element surrounds the winding head over an angular region that at least partially circumferentially around the axial direction of the electrical machine, such that a first wall of the channel element, designed as a solid and inherently rigid body, overlaps the winding head at least partially, in particular at least predominantly and thus at least more than halfway or completely, in the radial direction of the electrical machine. A second wall of the channel element, also designed as a solid and inherently rigid body, overlaps the winding head at least partially, in particular at least predominantly and thus at least more than halfway or completely, in the radial direction of the electrical machine.A third wall of the channel element, designed as a solid and inherently rigid, overlaps the winding head at least partially, and in particular at least predominantly, and thus at least more than halfway or completely, in the axial direction of the electrical machine towards the laminated core. This means that the third wall of the channel element overlaps the winding head at least partially in a first direction that runs parallel to or coincides with the axial direction of the electrical machine, with the first direction pointing from the winding head towards the laminated core. A fourth wall of the channel element, also designed as a solid and inherently rigid, overlaps the winding head at least partially, and in particular at least predominantly, and thus at least more than halfway or completely, in the axial direction away from the laminated core.This means that the fourth wall of the channel element at least partially overlaps the winding head in a second direction that runs parallel to or coincides with the axial direction of the electrical machine, wherein the second direction is opposite to the first direction and points away from the winding head and away from the laminated core. Because the aforementioned walls of the channel element overlap the winding head, they form a channel through which a preferably liquid temperature control medium can flow for temperature control, i.e., cooling and / or heating of the winding head, in particular such that the walls directly define the channel. As a result, the temperature control medium comes into direct contact with the walls as it travels through the channel.The winding head is arranged in the channel across the angular range, so that the tempering agent, on its way through the channel and around the circumference of the electrical machine, touches the winding head, in particular directly.

[0009] Preferably, the temperature control medium, which is preferably liquid and thus preferably in the form of a liquid, is a component of the electric machine. For example, the temperature control medium can be an oil.

[0010] If the cooling fluid has a higher temperature than the winding head as it flows through the channel, heat can be transferred from the cooling fluid to the winding head, thus heating it. Conversely, if the cooling fluid has a lower temperature than the winding head as it flows through the channel, heat can be transferred from the winding head to the cooling fluid, thus cooling it. This allows for effective and efficient temperature control of the winding head and, consequently, the electrical machine.

[0011] It is evident that the channel element is a capsule or a type of capsule in which the winding head is positioned or contained within the channel. This allows the winding head to be supplied with the temperature control medium in a targeted and demand-based manner, thus enabling effective and efficient temperature control, i.e., heating and / or cooling of the winding head.Since the winding head is arranged in the channel and thus in the channel element, and since the channel element and thus the channel extends at least partially around the electrical machine in a circumferential direction around the axial direction of the electrical machine, the channel element is a channel element that at least partially surrounds the winding head in the circumferential direction of the electrical machine and is placed around the otherwise exposed winding head, in particular such that a sufficiently large volume is created through which the temperature control medium can flow, especially even when it has only a low temperature and thus a high viscosity.

[0012] To facilitate easy assembly of the channel element, it is preferably designed to comprise several separately formed and interconnected channel sections, each dimensionally stable and designed as a solid body. Preferably, the channel element is made of a material that is preferably non-magnetic, i.e., in particular non-ferromagnetic. For example, the material is a plastic such as rubber, or a metallic material such as aluminum, i.e., in particular an aluminum alloy. The channel element enables a high degree of wetting of the winding head. This means that it ensures that an advantageously large area of ​​the winding head, particularly on its outer circumference, can be wetted with the temperature control medium, thus enabling particularly effective temperature control of the winding head.

[0013] In order to supply the winding head with the temperature control medium in a particularly demand-oriented manner and thus to achieve a particularly advantageous temperature control of the winding head and therefore of the electrical machine, one embodiment of the invention provides that the channel element has at least one inlet opening opening at one end into the channel and at the other end into an environment of the channel element, and thereby, for example, into a receiving area limited by the housing, in particular directly, through which the temperature control medium for temperature control of the winding head can be introduced from the environment of the channel element and in particular from the area into the channel.

[0014] It has proven particularly advantageous if the inlet opening, which is preferably designed as a through-hole, is located in the second wall. This allows the temperature control medium to be introduced into the channel particularly efficiently and then flow through it particularly efficiently, thus enabling the winding head to be temperature-controlled particularly effectively.

[0015] Preferably, the inlet opening is arranged on a side of the channel element that points upwards in the vehicle's vertical direction when the electric machine is installed, with the electric machine assuming its installation position in the fully assembled state of the vehicle containing the electric machine. This allows, for example, the temperature control fluid, after being introduced into the channel via the inlet opening, to float along the channel and along the winding head due to gravity, thereby temperature-controlling the winding head particularly effectively and efficiently.

[0016] Therefore, it is preferably provided that the inlet opening, viewed in the circumferential direction of the electric machine, is arranged at the twelve o'clock position.

[0017] Another embodiment is characterized by the provision of a dispensing element, also referred to as a shower or nozzle, which is fixed relative to the housing and has at least one dispensing opening through which the temperature control medium can flow. The temperature control medium can be dispensed from the dispensing element via this dispensing opening. The dispensing opening is arranged in overlap with the inlet opening, allowing the temperature control medium flowing through the dispensing opening and thus dispensed from the dispensing opening and the dispensing element to be injected, in particular directly, into the inlet opening and through it, and thus into the channel. This allows the channel, and therefore the winding head, to be supplied with the temperature control medium in a particularly demand-oriented manner, thereby enabling a particularly advantageous temperature control of the winding head.

[0018] In a further, particularly advantageous embodiment of the invention, the channel element has at least one outlet opening into the channel at one end and into the surroundings of the channel element at the other end, and in particular into the area of ​​the electrical machine. The outlet opening is spaced circumferentially from the inlet opening through which the temperature control fluid can be discharged from the channel into the surroundings and, for example, into the area of ​​the electrical machine. This allows the temperature control fluid, after flowing through the channel and temperature-conditioning the winding head, to be discharged from the channel in a controlled manner. The temperature control fluid can then be supplied, for example, to a heat exchanger, by means of which it can be temperature-controlled. This enables effective and efficient temperature control of the winding head.For example, the outlet opening is spaced from the inlet opening, viewed in the circumferential direction of the electric machine, by, in particular, exactly 180 degrees. Thus, it is preferably provided that the outlet opening, viewed in the circumferential direction of the electric machine, is arranged at or near the six o'clock position. In particular, it is conceivable that the outlet opening is located exactly opposite the inlet opening in the radial direction of the electric machine. This allows the temperature control medium, on its way from the inlet opening to the outlet opening, to advantageously absorb heat from or transfer heat to the winding head, thereby enabling particularly effective and efficient temperature control of the winding head.

[0019] In order to guide the temperature control medium particularly advantageously via the channel and thus to temperature control the winding head particularly advantageously by means of the temperature control medium, a further embodiment of the invention provides that the outlet opening is formed in the second wall of the channel element. Preferably, the outlet opening is a further through-opening.

[0020] The channel element does not necessarily have to be sealed to the temperature control medium, whereby an advantageous guidance of the temperature control medium and consequently a particularly high degree of wetting of the winding head can still be achieved.

[0021] However, it has proven particularly advantageous if the channel element is completely sealed to the temperature control medium, with the exception of at least one inlet opening and at least one outlet opening. This prevents unwanted flows and leaks, allowing the winding head to be supplied with the temperature control medium in a targeted manner and thus effectively temperature-controlled.

[0022] Another embodiment is characterized by an angular range of 360 degrees, so that the channel element and the channel completely encircle the electrical machine. This also means that the channel completely encircles the electrical machine and is thus arranged within the channel over a 360-degree arc, thereby enabling particularly effective and efficient temperature control of the winding head.

[0023] Finally, it has proven particularly advantageous if the channel element is stationary relative to the housing. This allows the temperature control fluid to be directed precisely and according to demand, ensuring optimal temperature control of the winding head.

[0024] A second aspect of the invention relates to a motor vehicle, also referred to simply as a vehicle, and preferably designed as a motor car, in particular a passenger car, which has at least one electric machine according to the first aspect of the invention and can be driven electrically by means of the electric machine, in particular purely electrically. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention and vice versa.

[0025] Further details of the invention will become apparent from the following descriptions of a preferred embodiment with the accompanying drawing. The drawing shows:

[0026] Fig. 1 is a schematic longitudinal sectional view of an electric motor vehicle; and

[0027] Fig. 2 shows a partial schematic cross-sectional view of the electric machine.

[0028] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0029] Fig. 1 shows a schematic longitudinal sectional view of an electric machine 1 for a motor vehicle, also referred to simply as a vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state has the electric machine 1 and can be driven electrically by means of the electric machine 1, in particular purely electrically. The electric machine 1 has a housing 2, also referred to as the machine housing, which directly delimits a region 3, also referred to as the receiving space or receiving area. In particular, the region 3 is directly delimited by an inner circumferential surface 4 of the housing 2.

[0030] The electric machine 1 has a stator 5 arranged at least partially in region 3 and thus in the housing 2. Furthermore, the electric machine 1 has a rotor 6 arranged at least partially in region 3 and thus at least partially in the housing 2, which can be driven by means of the stator 5 and is therefore rotatable relative to the housing 2 and relative to the stator 5 about a machine axis of rotation 7, the axial direction of which coincides with the machine axis of rotation 7. Via the rotor 7, the electric machine 1, whose radial direction is perpendicular to the axial direction of the electric machine 1 and thus perpendicular to the machine axis of rotation 7, can provide drive torques for, in particular, purely electric propulsion of the motor vehicle.The stator 5 has a laminated core 8, also referred to as the rotor core, which is formed separately from the housing and the rotor 6. This core is connected to the housing 2, for example, at least indirectly, and in particular directly, such that any relative movement between the housing 2 and the laminated core 8 in the axial direction of the electric machine 1 is prevented. Furthermore, the laminated core 8 is preferably connected to the housing 2 in a rotationally fixed manner, at least indirectly. The stator 5 also has at least one winding 9, which is formed separately from the housing 2 and the laminated core 8. This winding is attached to the laminated core 8 and thus supported by the laminated core 8. For example, the first longitudinal sections L1 of the winding 9 run within slots in the laminated core 8.Second length sections L2 of the winding 9 are arranged outside the laminated core 8 and project axially from a first axial end face S1 of the laminated core 8 in the direction of the electric machine 1, with the length sections L2 forming a first winding head W1 of the winding 9. The winding head W1 is arranged on the first axial end face S1. Third length sections L3 are arranged outside the laminated core 8 and project axially from a second axial end face S2 of the laminated core 8 in the direction of the electric machine 1, with the third length sections L3 forming a second winding head W2 of the winding 9. It can be seen that the winding head W2 is arranged on the second axial end face S2, with the axial end faces S1 and S2 of the laminated core 8 pointing away from each other in the axial direction of the electric machine 1. The winding heads W1 and W2 are arranged in the area and thus in the housing 2.

[0031] In order to be able to particularly advantageously temperature control, i.e., cooling and / or heating, the respective winding heads W1, W2 and thus the electric machine 1, a respective rigid channel element 10, 11 is assigned to each winding head W1, W2. Preferably, the channel elements 10 and 11 are designed separately from each other. The respective channel element 10, 11 is separate from the rotor 6, separate from the stator 5 and thus separate from the laminated core 8 and separate from the winding 9, and also separate from the housing 2. Preferably, the respective channel element 10, 11 is held at least indirectly to the housing 2 in such a way that the respective channel element 10, 11 is immovable relative to the housing 2.The respective channel element 10, 11, associated with the respective winding head W1, W2, surrounds the respective winding head W1, W2, to which the respective channel element 10, 11 is assigned, over an angular range that at least partially circumferentially surrounds the electrical machine 1, such that a respective first wall 12 of the respective channel element 10, 11 overlaps the respective winding head W1, W2 inwards in the radial direction of the electrical machine 1, at least partially, in particular at least predominantly and thus to more than half or completely. The radial direction of the electrical machine 1 is illustrated by a double arrow 13. The axial direction of the electrical machine 1, which coincides with the machine's axis of rotation 7, is illustrated by a double arrow 14.The circumferential direction of the electric machine 1 is around the axial direction of the electric machine 1, and thus around the machine's axis of rotation 7, and is illustrated by a double arrow 15. In particular, the circumferential direction of the electric machine 1 lies in a plane that is perpendicular to the axial direction of the electric machine 1. In the embodiment shown in the figures, the angular range is 360 degrees.

[0032] A second wall 16 of each channel element 10, 11 overlaps the respective associated winding head W1, W2 at least partially, and in particular at least predominantly, in the radial direction of the electric machine 1. A third wall 17 of each channel element 10, 11 overlaps the respective associated winding head W1, W2 in the axial direction of the electric machine 1 towards the laminated core 8. In Fig. 1, a first direction is illustrated by an arrow 18, and a second direction opposite to the first is illustrated by an arrow 19. The first direction runs parallel to or coincides with the axial direction of the electric machine 1. The second direction runs parallel to or coincides with the axial direction of the electric machine 1.It can be seen that, starting from the winding head W1, the first direction points towards the laminated core 8 and the winding head W2, with the winding head W1 being at least partially overlapped in the first direction by the third wall 17 of the channel element 10. Starting from the winding head W2, the second direction points towards the laminated core 8 and the winding head W1. It can be seen that the winding head W2 is at least partially overlapped in the second direction by the wall 17 of the channel element 10. A respective fourth wall 20 of the respective channel elements 10, 11 overlaps the respective winding heads W1, W2 in the axial direction of the electric machine 1 away from the laminated core 8. This means that the winding head W1 is at least partially overlapped in the second direction by the wall 20 of the channel element 10. Furthermore, the winding head W2 is at least partially overlapped in the first direction by the fourth wall 20 of the channel element 11.It is also evident that the respective walls 12, 16, 17 and 20 of the respective channel element 10, 11 delimit a respective channel K of the respective channel element 10, 11, in particular directly. The respective channel K is permeable to a temperature control medium, preferably liquid, by means of which the respective winding head W1, W2 can be temperature controlled, i.e., cooled and / or heated. For example, the temperature control medium is an oil.

[0033] In the embodiment shown in the figures, each channel element 10, 11 has several inlet openings 21, which are arranged one after the other in the circumferential direction of the electric machine 1 and are spaced apart from each other. In conjunction with Fig. 2, it can be seen that, for example, each inlet opening 21 is associated with a corresponding dispensing element 22. This will be explained in more detail below. Each inlet opening 21 opens at one end into the respective channel K of the respective channel element 10, 11 and at the other end into the surrounding area of ​​the respective channel element 10, 11, the surrounding area being predominantly the region 3 and thus within the housing 2. The temperature control medium provided or formed for temperature control of the respective winding head W1, W2 can be introduced from the surrounding area of ​​the respective channel element 10, 11 into the respective channel K via the respective inlet opening 21.In the embodiment shown in the figures, the respective inlet opening 21 is formed in the respective second wall of the respective channel element 10, 11.

[0034] The respective spray element 22 is also referred to as a shower and is immovable relative to the housing 2. As can be seen in Fig. 2, the respective spray element 22 projects radially inwards from the housing 2 in the direction of the electric machine. The respective spray element 22 has at least one spray opening, not visible in the figures, through which the temperature control fluid flows, and the respective spray element 22 and its respective spray opening are permeable to the temperature control fluid. Thus, the temperature control fluid can be sprayed out of the respective spray element 22 via the respective spray opening of the respective spray element 22.The respective dispensing opening of each dispensing element 22 is arranged in overlap with the respective, associated inlet opening 21, whereby the temperature control fluid flowing through the respective dispensing opening and thus dispensed from the respective dispensing opening and from the respective dispensing element 22 can be injected directly into the respective, associated inlet opening 21 and thus into the respective channel K of the respective channel element K1, K2. Subsequently, the temperature control fluid can flow through the respective channel K in the circumferential direction of the electric machine 1. This allows for particularly advantageous heat exchange between the respective winding heads W1, W2 and the temperature control fluid flowing through the respective channel K in the circumferential direction of the electric machine 1, thereby enabling effective and efficient temperature control of the winding heads W1 and W2.

[0035] As can also be seen from Fig. 1, each channel element 10, 11 has at least one or exactly one outlet opening 23, which opens at one end into the respective channel K and at the other end into the surroundings of the respective channel element 10, 11, and thus predominantly in region 3, in the circumferential direction of the electric machine 1 and is spaced apart from the respective inlet opening 21, through which the temperature control medium can be discharged from the respective channel K and directed into the surroundings of the respective channel element 10, 11 and thus into region 3. It can be seen that the respective outlet opening 23 is formed in the respective second wall 16 of the respective channel element 10, 11.

[0036] In the embodiment shown in the figures, the channel elements 10 and 11 are immobile relative to the housing 2, which allows the temperature control medium to be guided in a targeted and required manner.

[0037] In Fig. 1, solid lines 24 illustrate the cooling medium which is sprayed off by the rotor 6, especially when the rotor 6 rotates about the machine axis of rotation 7 relative to the stator 5.

[0038] The winding 9 can, for example, be designed as a so-called hairpin winding. The respective channel element 10, 11 is, for example, made of plastic. The respective channel element 10, 11 is, for example, multi-part, such that the respective channel element 10, 11 has a larger number of channel parts than the single element, with the respective channel parts of the respective channel element 10, 11 being formed separately from one another and connected to each other. For example, the number is three or four. The respective channel part is, for example, made of plastic, so that the respective channel part is, for example, a plastic part. The respective channel element 10, 11 is, for example, designed in a stretched construction, so that the respective channel parts of the respective channel element 10, 11 are plugged together and thus connected to each other.Alternatively or additionally, the respective channel element 10, 11 is connected, at least indirectly, to the housing 2 and / or to the respective associated winding head W1, W2 by means of at least one plug connection. It can be seen that the spray elements 22, which are designed or function, for example, as showers, supply the respective channel K with the temperature control fluid via the respective inlet opening 21, also referred to as the inlet opening. The temperature control fluid flows in the respective channel K along the respective winding head W1, W2 located in the respective channel K and up to the respective outlet opening 23, also referred to as the outlet opening. It can be seen that the respective winding head W1, W2 is accommodated in the respective channel K1, across the respective angular ranges mentioned.In the embodiment shown in the figures, this angular range is 360 degrees, so that in this embodiment, the respective winding head W1, W2 rotates completely around the electrical machine 1 in the circumferential direction and thus covers 360 degrees in the respective channel K and therefore in the respective channel element 10, 11. This allows for a particularly advantageous, at least substantially homogeneous, temperature distribution at the respective winding head W1, W2. In particular, excessively high temperatures of the respective winding head W1, W2 can be avoided.

[0039] For example, the electric machine 1 can be operated in a trimming mode. In this trimming mode, stationary trimming takes place. During stationary trimming, direct current is applied to one phase of the stator 5, but without generating a rotating magnetic field and thus without driving the rotor 6. Which phase is used can depend on the stationary position of the rotor 6 and is usually not optimally chosen. The rotor 6 remains in its stationary position. This deliberately generates losses, particularly in the winding 9 and especially in conductors of the winding 9 made of, for example, copper.The losses result in heat, which can be used to heat an electrical energy storage device, such as a high-voltage component, to store electrical energy and thus bring it up to operating temperature, and / or to heat the interior of the vehicle, also known as the passenger compartment, passenger cell, or cabin. The electric machine 1 can then be supplied with the electrical energy stored in the electrical energy storage device. Since a very high degree of wetting of the winding heads W1 and W2 can be achieved by means of the channel elements 10 and 11, particularly with regard to the wetting of the respective winding head W1, W2 with the temperature control fluid, it can be ensured, especially during stationary trimming, that a suitably large amount of the generated heat is dissipated to or into the temperature control fluid and does not lead to an undesirably high temperature of the energized winding 9.Influences on the stand trim, such as the parking position, are therefore not relevant.

[0040] Reference symbol list

[0041] 1 electric machine

[0042] 2 cases

[0043] 3 area

[0044] 4 inner circumferential surface

[0045] 5 Stator

[0046] 6 Rotor

[0047] 7 Machine rotary axis

[0048] 8 sheet metal package

[0049] 9 windings

[0050] 10 channel elements

[0051] 11 Channel element

[0052] 12 first wall

[0053] 13 Double Arrow

[0054] 14 Double Arrow

[0055] 15 Double Arrow

[0056] 16 second wall

[0057] 17 third wall

[0058] 18 Arrow

[0059] 19 Arrow

[0060] 20 fourth wall

[0061] 21 Entrance opening

[0062] 22 Injection element

[0063] 23 Exit opening

[0064] 24 lines

[0065] L1 length range

[0066] L2 length range

[0067] L3 length range

[0068] S1 axial face

[0069] S2 axial face

[0070] W1 winding head

[0071] W2 winding head

Claims

Patent claims 1. Electric machine (1) for a motor vehicle, comprising a housing (2), a stator (5) arranged at least partially in the housing (2), the stator comprising a laminated core (8) and at least one winding (9) comprising a winding head (W1) arranged on an axial end face (S1) of the laminated core (8) and in the housing (2), characterized by at least one channel element (10) formed separately from the housing (2), separately from the winding (9) and separately from the laminated core (8), which surrounds the winding head (W1) over an angular range that at least partially circumferentially around the electric machine (1) such that a first wall (12) of the channel element (10) surrounds the winding head (W1) inwards in the radial direction of the electric machine (1), and a second wall (16) of the channel element (10) surrounds the winding head (W1) outwards in the radial direction of the electric machine (1).A third wall (17) of the channel element (10) overlaps the winding head (W1) in the axial direction of the electric machine (1) towards the laminated core (8), and a fourth wall (20) of the channel element (10) overlaps the winding head (W1) in the axial radial direction of the electric machine (1) away from the laminated core (5), whereby the walls (12, 16, 17, 20) define a channel (K) of the channel element (10) through which a temperature control medium flows for temperature control of the winding head (W1), in whose channel (K) the winding head (W1) is received over the angular range.

2. Electric machine (1) according to claim 1 , characterized in that the channel element (10) has at least one inlet opening (21) opening at one end into the channel (K) and at the other end into an environment of the channel element (10), through which the temperature control medium for temperature control of the winding head (W1) can be introduced from the environment of the channel element (10) into the channel (K).

3. Electric machine (1) according to claim 2, characterized in that the inlet opening (21) is formed in the second wall (16).

4. Electric machine (1) according to claim 2 or 3, characterized by an injection element (22) that is immovable relative to the housing (2) and has at least one injection opening through which the temperature control medium can flow, and through which the temperature control medium can be injected from the injection element (22), wherein the injection opening is arranged in overlap with the inlet opening (21), whereby the temperature control medium flowing through the injection opening and thereby injected from the injection opening can be injected into the inlet opening (21) and can be injected through the inlet opening (21) and thereby into the channel (K).

5. Electric machine (1) according to one of claims 2 to 4, characterized in that the channel element (10) has at least one outlet opening (23) which opens into the channel (K) at one end and into the surroundings of the channel element (10) at the other end and is spaced apart in the circumferential direction of the electric machine (1) from the inlet opening (21), through which the temperature control medium can be discharged from the channel (K) and directed into the surroundings.

6. Electric machine (1) according to claim 5, characterized in that the outlet opening (23) is formed in the second wall (16).

7. Electric machine (1) according to claim 5 or 6 in reference to one of claims 2 to 4, characterized in that the channel element (10) is completely sealed to the temperature control medium with the exception of the at least one inlet opening (21) and with the exception of the at least one outlet opening (23).

8. Electric machine (1) according to one of the preceding claims, characterized in that the angular range is 360 degrees, so that the channel element (10) and the channel (K) completely circumferentially around the electric machine (1).

9. Electric machine (1) according to one of the preceding claims, characterized in that the channel element (10) is immovable relative to the housing (2).

10. Motor vehicle comprising at least one electric machine (1) according to any of the preceding claims.

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