Method for manufacturing a stator, as well as stator and electrical machine with the stator

Abstract

A method for manufacturing a stator 2 for an electric machine 1 is proposed, wherein the stator 2 has a stator core 4 and a magnet unit 5 for generating a magnetic field, the magnet unit 5 being arranged on the stator core 4, in which at least sectionally a plastic coating 10 is formed on the stator core 4 and a housing section 12 is formed by die casting to form a housing 11 of the electric machine 1, wherein the plastic-coated stator 30 is arranged as an insert during die casting in a die-casting tool 19.

Description

[0001] The invention relates to a method for producing a stator having the features of the preamble of claim 1. Furthermore, the invention relates to a stator produced by the method and to an electrical machine comprising the stator.

[0002] The stator, also known as the stand, forms the stationary part of an electrical machine and interacts magnetically with a rotor to generate a rotary motion in the rotor. To generate the rotary motion, spatially and temporally varying magnetic fields are usually generated in the rotor and / or stator. The rotor torque generates a corresponding counter-torque of the same magnitude in the stator, which must be supported by a housing that houses the stator.

[0003] The document JP 2022 152 852 A describes a stator of a rotating electrical machine, comprising a stator core in which a plurality of slots are formed; a plurality of coils arranged in the slots; a housing that fixes the stator core and on the inside of which a flow channel is formed through which a coolant can pass; and a heat-conductive sealing material for sealing the coils outside the slots, comprising a shaped metal that is in contact with the sealing material to cover the sealing material, wherein the shaped metal is thermally connected to the housing.

[0004] The object of the invention is to create a simple and cost-effective method for producing a stator.

[0005] This object is achieved by a method having the features of claim 1, a stator having the features of claim 14, and a stator having the features of claim 15. Further features, advantages, and effects of the invention are described in the subclaims and the description with the figures.

[0006] The invention relates to a method for producing a stator that is designed and / or suitable for an electrical machine. In particular, the electrical machine is designed as an internal rotor, with a rotor arranged radially within the stator.

[0007] The stator has a stator core. In particular, the stator core has an annular stator yoke on which a plurality of radially projecting stator teeth are arranged in the circumferential direction. In an internal rotor design, the stator core preferably has a plurality of radially inwardly directed stator teeth. Specifically, the stator teeth form a plurality of grooves, each extending along a longitudinal axis.

[0008] The stator has a magnet unit which is designed and / or suitable for generating a magnetic field, wherein the magnet unit is arranged on the stator core. In principle, the magnet unit can be formed by permanent magnets which are arranged in receiving pockets or in the grooves between the stator teeth. Alternatively, the magnet unit is formed by an electromagnet which is formed by a multi-phase stator winding. The stator winding can have at least or exactly one winding end per phase, which extend in an axial direction with respect to a stator axis. In particular, the stator winding has exactly three phase windings for contacting power electronics, wherein each phase winding comprises at least one partial phase. The stator winding is preferably designed as a hairpin winding or a wave winding.The magnet unit can optionally have insulators which serve to electrically insulate the stator winding from the stator core and / or the individual sub-strands.

[0009] According to the invention, in the method, a plastic sheath is formed at least in sections on the stator core and a housing section for forming a housing of the electrical machine is formed by die casting, wherein the plastic-coated stator is arranged as an insert in a die-casting tool during die casting and / or is inserted before die casting. In particular, the plastic sheath serves to electrically insulate the stator from the housing section and / or to provide a liquid-resistant enclosure for the stator in a wet space and / or to form a cooling jacket for cooling the stator. To produce the plastic sheath, the magnet unit is pre-assembled to the stator core, and then the pre-assembled stator is coated with the plastic. The plastic sheath preferably surrounds at least the stator core and optionally additionally largely or completely the magnet unit.In particular, the stator winding forms a winding head on both sides, with the plastic sheathing at least partially enclosing the two winding heads. In particular, the housing section serves to house the electrical machine and / or to attach it to an surrounding geometry, such as a gearbox, vehicle frame, etc. To produce the housing section, the plastic-enclosed stator is placed in the die-casting tool, then the housing section is produced by die-casting and connected to the stator via the plastic sheathing. The housing section preferably surrounds at least the stator core and optionally additionally at least partially the magnet unit. In particular, the stator, preferably the stator core, is arranged completely within the housing section. In principle, the housing section can be designed essentially as a cylindrical housing in which the stator is radially received.Optionally, the housing section can form at least one bearing plate on which the rotor is rotatably mounted.

[0010] The invention is based on the finding that the plastic-coated stator must be integrated into a housing and fixed in place in order to support the torque generated during operation of the electrical machine via the stator on the housing. Current developments call for a press fit of the stator to fix the stator in the housing. However, this can lead to high mechanical stresses during operation, high reject rates during assembly due to destruction of the plastic layer, high demands on manufacturing tolerances and to flow of the plastic and thus a loss of the press fit. Another option for fixing the stator in the motor housing is gluing. However, this places high demands on the cleanliness of the surfaces and can lead to high mechanical stress at high temperatures, which can result in uncertainties regarding the service life. In addition, gluing is an expensive and complex manufacturing process.

[0011] The advantage of the invention is that the use of the plastic-coated stator as an insert in a die-casting process enables a particularly simple and cost-effective connection between the stator and the housing section. Furthermore, the high demands on the stator's manufacturing tolerances for achieving a backlash-free and rotationally secure fixation of the stator in the housing are eliminated. Thus, a particularly simple and cost-effective method for manufacturing the stator is proposed.

[0012] In one specific embodiment, the plastic sheath is melted during die casting and bonded to the housing section. In other words, a material bond is created between the plastic sheath and the housing section by melting during die casting. For this purpose, a liquid metal melt, preferably a casting alloy, is introduced into the die casting tool, the temperature of which has been heated above a melting temperature of the plastic of the plastic sheath. Preferably, the melting temperatures of the plastic and the casting alloy are coordinated in such a way that the melting of the plastic sheath only occurs superficially, so that the plastic sheath essentially retains its shape during die casting. In other words, during melting, the plastic sheath is only partially melted and / or at least partially liquefied.The contact of the molten metal with the plastic causes the molten metal to at least partially penetrate the plastic. Depending on the depth of penetration of the molten metal into the plastic, a bonding zone forms between the housing section and the plastic casing after the molten metal and the plastic have solidified. This creates a material bond between the plastic casing and the housing section, which ensures a rotationally fixed fixation of the stator in the housing.

[0013] In a specific embodiment, it is provided that the stator core is circumferentially encased by the plastic sheath at least on a radial outer side, wherein the housing section is formed exclusively in the region of the plastic sheath. Optionally, the stator core is circumferentially encased by the plastic sheath on the axial end faces and / or on a radial inner side. The housing section can thus additionally be formed at least in sections on the axial end faces and / or on the radial inner side of the stator core in the region of the plastic sheath. Alternatively or optionally additionally, the magnet unit, in particular the winding heads, are circumferentially encased by the plastic sheath on the radial outer side and / or the radial inner side and / or on the axial end faces.The housing section can thus additionally be formed at least partially on the radial outer side and / or the radial inner side and / or on the axial end faces of the winding heads in the area of ​​the plastic sheathing. Specifically, die-casting can easily produce any desired housing structure, which can surround the stator core and, if applicable, the magnet unit in any configuration and shape. Die-casting also makes it easy to create one or more undercuts, which create an additional positive connection between the housing section and the plastic sheathing.

[0014] In a further development, it is provided that the die-casting tool has a cavity, wherein the plastic-coated stator is positioned in the cavity prior to die-casting. In particular, the cavity is formed by a multi-part, preferably two-part, casting mold which can be opened to accommodate the plastic-coated stator. The plastic-coated stator can be arranged at least in sections within the cavity and / or fixed in the correct position or in a fixed position. For this purpose, the plastic-coated stator can be fixed in the die-casting tool and / or by the die-casting tool in a form-fitting and / or force-fitting manner. For die-casting, the die-casting tool, in particular the casting mold, is closed and the molten metal is filled into the cavities, whereby the housing section is formed and simultaneously bonded to the plastic coating.The casting mold is filled with molten metal under high pressure of approximately 10 to 200 MPa. Specifically, the die casting process is a hot-chamber process. Thus, a die casting process is proposed in which the plastic-coated stator is simply inserted into the cavity of the die casting tool as an insert to form the housing section directly on the stator.

[0015] In a further specific embodiment, the housing section is formed by an aluminum die-casting. In particular, the molten metal is made of aluminum or an alloy containing at least aluminum, such as the alloy AlSi9Cu3(Fe). This allows the production of a housing section with a low component weight, which is particularly suitable for use in the automotive sector.

[0016] In a specific embodiment, it is provided that the plastic sheath is formed from a thermally conductive and / or high-strength and / or heat-resistant plastic with a high heat distortion temperature.

[0017] In particular, the plastic has a thermal conductivity of more than 0.5 W / (m*K), preferably more than 3 W / (m*K), especially more than 10 W / (m*K). For this purpose, thermally conductive additives can preferably be added to the plastic.

[0018] Alternatively or optionally, the plastic has a fiber reinforcement.

[0019] Alternatively or optionally additionally, the plastic has a melting point of over 250 °C, preferably over 300 °C, in particular over 330 °C.

[0020] By using thermally conductive plastic, the efficiency and / or power density of the motor can be improved. Furthermore, the use of a high-strength plastic can significantly increase the transmitted torque. The use of a heat-resistant plastic also ensures that the plastic casing is only partially melted during die-casting and thus remains essentially dimensionally stable.

[0021] In a more specific version, the plastic sheathing is intended to be made of fiber-reinforced PPA, PPS, PEEK, or a thermoset, or to include these materials. The use of radiation-crosslinked PA66 is also conceivable.

[0022] In a further specific embodiment, it is provided that the plastic casing has a form-fitting contour on the radial outer side, via which the plastic casing is positively connected to the housing section at least in the circumferential direction after die-casting. In particular, the form-fitting contour is formed by one or more elevations, e.g. webs, and / or depressions, e.g. grooves, arranged on the outer circumference of the plastic casing. Alternatively or optionally additionally, the form-fitting contour can be formed by a non-circular, in particular elliptical, angular, etc., outer contour of the plastic casing. The additional form-fitting can improve the torque transmission to the housing section, which leads to greater reliability during operation and to higher transmittable torques.

[0023] In one specific embodiment, the positive-locking contour is formed by a polygonal outer contour of the plastic sheath. In particular, the plastic sheath has the polygonal outer contour when viewed in cross-section or in an axial view. The polygonal outer contour is preferably formed over the entire axial length of the plastic sheath. The polygonal outer contour preferably has more than three, preferably more than six, and especially more than ten corner points. For example, the plastic sheath can have a hexagonal, octagonal, or decagonal shape. Thus, a positive-locking contour is proposed that can be easily formed on the plastic sheath and also ensures high torque transmission.

[0024] In a specific implementation, it is provided that the plastic sheath is formed by primary forming, wherein the stator core with the pre-assembled stator is arranged as an insert in a primary forming tool during the primary forming process and / or is inserted prior to the primary forming process. In particular, the stator core is pre-assembled with the magnet unit in a pre-assembly process and provided as a pre-assembled stator. The pre-assembled stator is then arranged in a cavity of the primary forming tool and then coated with the plastic in a primary forming process. Particularly preferably, the entire stator core and the magnet unit, in particular the winding heads, are completely coated with the plastic. For this purpose, a plastic melt is fed into the cavity, whereby the plastic sheath is formed and simultaneously bonded to the stator core and, if applicable, to the magnet unit.By arranging the pre-assembled stator in the primary forming tool, a material-to-material connection is created between the plastic casing and the stator core or the magnet unit, which enables a particularly high torque transmission to the plastic casing.

[0025] In a further development, the plastic casing is produced by injection molding or transfer molding. In particular, during injection molding, a loose molding compound is melted and homogenized using a screw, with the plastic melt produced in this way being injected under high pressure into the cavity of the master mold. Alternatively, in transfer molding, also known as "resin transfer molding," a molding compound is plasticized under the influence of pressure and heat, and the master mold is filled. During transfer molding, the molding compound is first heated in a filling chamber and, after plastic softening, is pressed through injection channels into a cavity of the previously closed master mold. Thus, two master molding processes are proposed which enable the stator core and, if applicable, the magnet unit to be easily coated with plastic.

[0026] In a further implementation, it is provided that during die-casting of the housing section and / or during primary forming of the plastic casing, at least or exactly one cooling channel is formed or co-formed, which is designed and / or suitable for guiding a cooling fluid, preferably a cooling liquid. In other words, the plastic casing forms a cooling jacket. In particular, the at least one cooling channel can be formed at least partially in the plastic casing and / or partially in the housing section. In principle, the at least one cooling channel can be formed in or on the plastic casing during primary forming. Alternatively or optionally additionally, the at least one cooling channel can be formed in or on the housing section during die-casting. Preferably, the stator has a plurality of cooling channels distributed in the circumferential direction. The cooling channels can extend in the axial direction and / or in the circumferential direction.Particularly preferably, the plastic casing is formed at least from the thermally conductive plastic. Thus, a stator is proposed that is characterized by particularly efficient operation and simple manufacturing of the cooling channel.

[0027] In a further embodiment, the stator core is formed from a plurality of laminations that are stacked one on top of the other along an axial direction to form a laminated core. In particular, the laminated core is produced by punching and / or gluing the individual laminations together. Alternatively, or optionally in addition, the laminations can simply be stacked and only connected to one another by the plastic sheathing during the primary forming process. Alternatively, it is also possible to combine a plurality of the laminations to form a partial laminated core, wherein a plurality, preferably at least two of the partial laminated cores are connected to one another by the plastic sheathing during the primary forming process. This enables particularly simple and cost-effective production of the stator core.

[0028] Another subject of the invention relates to a stator for an electrical machine, which was manufactured by the method described above or according to one of claims 1 to 13. In particular, the stator is characterized in that at least the stator core is integrally connected to the housing section via the plastic sheathing. Specifically, the stator has a connection zone between the plastic sheathing and the housing section, in which a material connection is formed directly between the plastic sheathing and the housing section.

[0029] Another subject matter of the invention relates to an electric machine designed and / or suitable for a vehicle. The electric machine preferably serves to generate an electric drive torque for the vehicle, in particular a traction torque. For example, the electric machine is designed as a so-called traction machine. The electric machine can be integrated into an electric drive train, preferably an electric axle. The electric drive train can be a purely electric or a hybrid drive train.

[0030] The electric machine essentially comprises a housing, a rotor, and the stator, as already described above or according to claim 14, wherein the housing section forms part of the housing. In particular, the housing is designed in several parts, wherein the further housing parts are designed as separate components which are connected to one another and / or to the housing section during assembly. Preferably, at least one housing part can be connected to the housing section in a form-fitting and / or force-fitting and / or material-fitting manner. For example, the housing part can be designed as a bearing plate, an intermediate housing, a cover, or the like.

[0031] Further features, advantages, and effects of the invention will become apparent from the following description of preferred embodiments of the invention. These show: Fig. 1 is a schematic sectional view of an electrical machine as an embodiment of the invention; Fig. 2 a three-dimensional representation of a pre-assembled stator of the electrical machine; Fig. 3 a three-dimensional representation of a plastic-coated stator of the electrical machine; Fig. 4 an axial view of a stator of the electric machine in a die-casting tool; Fig. 5 an axial view of the stator of the electric machine.

[0032] Fig. Figure 1 shows an electric machine 1, which serves to generate an electric drive torque, in particular a traction torque for an electric axle of a vehicle. The electric machine 1 is designed as an internal rotor and, for this purpose, has a stator 2 and a rotor 3 arranged radially within the stator 2.

[0033] The stator 2 is essentially formed from a stator core 4 and a magnet unit 5, with the stator core 4 supporting the magnet unit 5. In this exemplary embodiment, the magnet unit 5 is formed by a multi-phase stator winding 6, which is formed, for example, by a plurality of plug-in coils, for example in the form of hairpins or I-pins. The stator core 4 has a plurality of slots distributed in the circumferential direction and extending axially with respect to a stator axis 100, in which slots the plug-in coils are arranged and are contacted with one another at the ends in a respective winding head 7, 8.

[0034] The stator winding 6 has exactly three phase windings, each with at least one winding end 9, which extend in the axial direction with respect to the stator axis 100, parallel and / or aligned to one another along an inner diameter of the stator winding 6. The winding ends 9 can be interconnected via an interconnection device and electrically connected to a power electronics system (not shown).

[0035] The stator 2 has a plastic sheath 10 that surrounds the stator core 4 and the stator winding 6. The plastic sheath 10 completely encloses the stator core 4 on both a radial outer side and a radial inner side. Furthermore, the plastic sheath 10 completely encloses the two winding overhangs, with only the winding ends 9 of the stator winding 6 being exposed for electrical contact.

[0036] The electric machine 1 also has a housing 11, which serves to accommodate the stator 2 and the rotor 3. The housing 11 is formed in several parts, with a housing section 12 forming an integral part of the stator 2. For this purpose, the housing section 12 is integrally connected to the plastic casing 10 during a die-casting process, so that the housing section 12 is connected to the stator 2 in a rotationally fixed manner in the circumferential direction with respect to the stator axis 100. The housing section 12 is formed circumferentially on a radial outer side of the stator core 4.

[0037] The housing 11 has at least one housing part 13, e.g., a bearing plate, which is designed as a separate component. The housing part 14 is connected to the housing section 12 in such a way that the housing part 13 bears against the winding head 7 in a circumferentially sealing manner at least on one axial end face and / or on a radial outer side. For example, the housing part 13 can be connected to the housing section 12 in a force-fitting manner, e.g., via a screw connection. To form the housing 11, the housing 11 can have further housing parts, e.g., a housing cover or further bearing plate, which are not shown in detail here.

[0038] At least one cooling channel 14 can be formed between the further housing section 13 and the plastic casing 10, which extends in the circumferential direction and / or in the axial direction relative to the stator axis 100. The cooling channel 14 serves to guide a cooling fluid, which is passed through the cooling channel 14 to cool the stator 2. For this purpose, the further housing section 13 has at least one cooling fluid connection 15, via which the cooling channel 14 can be connected to a cooling circuit (not shown).

[0039] Based on the Fig. 2 to 4, the method for manufacturing the stator 2 will be described below. In a pre-assembly process, as in Fig. As shown in Figure 2, the stator core 4 is formed from a plurality of laminations 16, which are stacked one on top of the other in the axial direction relative to the stator axis 100 to form a laminated core. For example, the laminations can be formed into the laminated core by means of stamped stacking. Subsequently, the plug-in coils are inserted into the slots of the stator core 4 and connected to each other in pairs at the winding head 7 to form the stator winding 6, thereby forming a preassembled stator 20.

[0040] The pre-assembled stator 20 is formed in a primary forming process, as in Fig. 3, is provided with the plastic sheath 10. For this purpose, the pre-assembled stator 20 is inserted as an insert into a cavity of a primary forming tool, not shown, wherein the plastic sheath 10 is formed on the pre-assembled stator 20 by means of primary forming, e.g. by injection molding or transfer molding, whereby a plastic-coated stator 30 is formed. The cavity of the primary forming tool is filled under pressure with a plastic melt so that the stator core 4 and the stator winding 6, except for the winding ends 9, are completely covered with the plastic sheath 10. For example, one or more of the cooling channels 14 can be formed on or in the plastic sheath 10 during the primary forming process. Furthermore, a form-fitting contour 17 is formed on the outer circumference of the plastic sheath 10 during the primary forming process, which form-fitting contour 17 in the embodiment shown is formed by a plurality of webs running in the axial direction with respect to the stator axis 100.The form-fitting contour 17 serves to form an additional form-fitting connection between the plastic casing 10 and the housing section 12, at least in the circumferential direction with respect to the stator axis 100.

[0041] The plastic-coated stator 30 is produced in a die-casting process, as in Fig. 4, provided with the housing section 12. For this purpose, the plastic-coated stator 30 is inserted as an insert into a cavity 18 of a die-casting tool 19, wherein the housing section 12 is formed on the plastic-coated stator 30 by means of die-casting, e.g. by a hot-chamber process, whereby the stator 2, as shown in Fig. 5. For example, the die-casting tool 19 is designed as a two-part mold in which the plastic-coated stator 30 is arranged in sections, particularly in the region of the housing section 12. The plastic-coated stator 30 can be held in the correct position during the die-casting process in a form-fitting and / or force-fitting manner, e.g., by the die-casting tool 19.

[0042] During die casting, the cavity 18 of the die-casting tool 19 is filled under high pressure with a molten metal made of aluminum or an aluminum alloy, so that the plastic casing 10 is bonded to the housing section 12 all around in a materially bonded manner. For this purpose, the melting point of the plastic is designed to match the temperature of the molten metal in such a way that the plastic casing 12 is partially or superficially melted during die casting. The molten metal penetrates at least partially into the plastic, and depending on the penetration depth of the molten metal into the plastic, a material bond forms after solidification.

[0043] As can be seen from the Fig. 4 and Fig. 5, the form-locking contour 17 can alternatively be formed by a polygonal outer contour of the plastic casing 10, which together with the housing section 12 creates an additional form-locking connection in the circumferential direction with respect to the stator axis 100. For example, the form-locking contour 18 can be in the shape of a hexagon, as in Fig. 4, or in the shape of a decagon, as in Fig. 5 shown.

[0044] Because the housing section 12 is directly connected to the plastic sheath 10, the high manufacturing tolerance requirements of the stator 2 are eliminated, while at the same time, a rotationally fixed connection between the stator core 4 and the housing section 12 is created via the plastic sheath 10. The positive locking contour 18 also provides an additional positive locking for torque transmission, which leads to greater operational reliability and higher transmittable torques. Reference symbol 1 electric machine 2 Stator 3 Rotor 4 Stator core 5 Magnet unit 6 Stator winding 7 winding head 9 winding head 10 housings 12 Housing section 13 Housing part 14 Cooling channel 15 Cooling fluid connection 16 sheet metal slats 17 Form-fitting contour 18 Cavity 19 Die-casting tool 20 pre-assembled stator 30 plastic-coated stator 100 Stator axis QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] JP 2022 152 852 A

[0003]

Claims

[1] Method for producing a stator (2) for an electrical machine (1), wherein the stator (2) has a stator core (4) and a magnet unit (5) for generating a magnetic field, wherein the magnet unit (5) is arranged on the stator core (4), in which: - a plastic sheath (10) is formed at least in sections on the stator core (4); - a housing section (12) for forming a housing (11) of the electrical machine (1) is formed by die-casting, wherein the plastic-coated stator (30) is arranged as an insert in a die-casting tool (19) during die-casting. [2] Method according to claim 1, characterized by that the plastic sheath (10) is melted during die casting and is materially connected to the housing section (12). [3] Method according to claim 1 or 2, characterized bythat the stator core (4) is circumferentially encased by the plastic sheath (10) at least on a radial outer side, wherein the housing section (12) is formed exclusively in the region of the plastic sheath (10). [4] Method according to one of the preceding claims, characterized by in that the die-casting tool (19) has a cavity (18), wherein the plastic-coated stator (30) is positioned in the cavity (18) before die-casting, the die-casting tool (19) is closed and a molten metal is fed into the cavities (19), whereby the housing section (12) is formed and at the same time is materially connected to the plastic casing (10). [5] Method according to one of the preceding claims, characterized by that the housing section (12) is formed by an aluminum die-casting. [6] Method according to one of the preceding claims, characterized bythat the plastic sheath (10) is formed from a thermally conductive and / or heat-resistant and / or high-strength plastic with a high temperature of distortion. [7] Method according to claim 6, characterized by that the plastic sheath (10) comprises a fiber-reinforced PPA, PPS, PEEK, radiation-crosslinked PA66 or a thermoset. [8] Method according to one of the preceding claims, characterized by that the plastic casing (10) has a form-fitting contour (17) on the radial outer side, via which the plastic casing (10) is positively connected to the housing section (12) at least in the circumferential direction after the die-casting. [9] Method according to claim 8, characterized by that the form-fitting contour (17) is formed by a polygonal outer contour of the plastic sheath (10). [10] Method according to one of the preceding claims, characterized bythat the plastic casing (10) is formed by primary forming, wherein a pre-assembled stator (20) is arranged as an insert in a primary forming tool during the primary forming. [11] Method according to claim 10, characterized by that the plastic sheath (10) is formed by injection molding or transfer molding. [12] Method according to one of the preceding claims, characterized by that during the die-casting of the housing section (12) and / or during the primary forming of the plastic casing (10), at least one cooling channel (14) for guiding a cooling fluid is formed or co-formed. [13] Method according to one of the preceding claims, characterized by that the stator core (4) is formed during pre-assembly from several laminations (16) which are stacked on top of one another along an axial direction to form a laminated core. [14] Stator (2) for an electrical machine (1), manufactured by the method according to one of the preceding claims. [15] Electric machine (1) for a vehicle, comprising a housing (11), a rotor (3), and the stator (2) according to claim 14, wherein the housing section (12) forms part of the housing (11).

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