CN115276273A

CN115276273A - Stator structure, axial flux motor, power assembly and vehicle

Info

Publication number: CN115276273A
Application number: CN202210764595.2A
Authority: CN
Inventors: 耿伟伟; 石超杰; 毋超强
Original assignee: Nanjing University of Science and Technology; Huawei Digital Power Technologies Co Ltd
Current assignee: Nanjing University of Science and Technology; Huawei Digital Power Technologies Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-11-01
Also published as: WO2024001416A1

Abstract

The embodiment of the application provides a stator structure, an axial flux motor, a power assembly and a vehicle, wherein the stator structure at least comprises a stator component, a stator outer diameter support and a stator inner diameter support which are coaxially arranged; the stator outer diameter support is positioned on the outer side of the stator component along the radial direction of the stator component, and the stator inner diameter support is positioned on the inner side of the stator component; the stator component comprises a stator iron core and at least two groups of armature windings; at least two groups of armature windings are distributed at intervals along the circumferential direction of the stator core and are respectively wound on the stator core; further comprising: at least two fixing members; at least two fixed parts are distributed at intervals along the circumferential direction of the stator core, each fixed part is positioned between two adjacent groups of armature windings, and each fixed part penetrates through the stator outer diameter support, the stator core and the stator inner diameter support along the radial direction of the stator core so as to fix the stator outer diameter support, the stator core and the stator inner diameter support, the integral strength of the stator structure can be improved, and the reliability of the axial flux motor can be improved.

Description

Stator structure, axial flux motor, power assembly and vehicle

Technical Field

The embodiment of the application relates to the technical field of flux motors, in particular to a stator structure, an axial flux motor, a power assembly and a vehicle.

Background

The axial flux motor has the characteristics of high torque density, high power density and the like due to the large air gap plane and compact structure. In an application scenario with limited requirements on size, weight and the like, for example, in an electric vehicle driving motor application, an axial flux motor has a significant application advantage compared with a radial motor at the same rotating speed.

In the related art, a stator structure of an axial flux motor includes a stator assembly, a first end cap, and a second end cap, where the stator assembly includes an inner support, a stator, and an outer housing, which are sequentially nested from inside to outside along a radial direction, the stator includes a stator core and a stator winding wound around the stator core, and the stator core is a structure that continuously surrounds the inner support. The first end cover and the second end cover are respectively arranged at two ends of the stator assembly along the axial direction, the first end cover, the inner side shell, the second end cover and the outer side shell are sequentially in sealing connection and jointly enclose to form a cooling cavity, and the stator is located in the cooling cavity.

However, in the above solution, the overall strength of the stator structure is poor, resulting in low reliability of the axial-flux motor.

Disclosure of Invention

The embodiment of the application provides a stator structure, axial flux motor, power assembly and vehicle, can promote stator structure's bulk strength to can promote stator structure's overall reliability, and then can promote axial flux motor's overall reliability.

In a first aspect, an embodiment of the present application provides a stator structure, where the stator structure at least includes: the stator assembly, the stator outer diameter bracket and the stator inner diameter bracket are coaxially arranged; the stator outer diameter support is positioned on the outer side of the stator assembly, and the stator inner diameter support is positioned on the inner side of the stator assembly along the radial direction of the stator assembly; the stator assembly comprises a stator core and at least two groups of armature windings; the at least two groups of armature windings are distributed at intervals along the circumferential direction of the stator core and are respectively wound on the stator core; further comprising: at least two fixing pieces; the at least two fixing pieces are distributed at intervals along the circumferential direction of the stator core, each fixing piece is located between two adjacent groups of armature windings, and each fixing piece penetrates through the stator outer diameter support, the stator core and the stator inner diameter support along the radial direction of the stator core so as to fix the stator outer diameter support, the stator core and the stator inner diameter support.

The stator structure that this application embodiment provided, be provided with two at least fixings along stator core's circumferential direction interval distribution in this stator structure, through setting up every fixer between adjacent two sets of armature winding, every fixer passes the stator external diameter support along stator core's radial direction, stator core and stator internal diameter support, in order to play with the fixed effect as an organic whole of stator external diameter support, stator core and stator internal diameter support, compare in the prior art between stator external diameter support and stator core and between stator internal diameter support and the stator core adopt the mode of interior outer lane interference installation, this application embodiment sets up a plurality of fixings in stator core's circumferential direction, pass the stator external diameter support along stator core's radial direction through a plurality of fixings, stator core and stator internal diameter support are with stator external diameter support, stator core and stator internal diameter support are fixed as an organic whole, can promote the bulk strength of stator structure, thereby can promote the bulk reliability of stator structure, and then can promote axial magnetic machine's bulk reliability. In addition, the fixing strength of the fixing member to the stator outer diameter support, the stator core and the stator inner diameter support is high, so that the coaxiality of the stator outer diameter support, the stator core and the stator inner diameter support can be further ensured, and the mass production of the stator structure can be facilitated.

In a possible implementation manner, at least two first grooves are formed in the outer circumferential wall of the stator core, and the at least two first grooves are distributed at intervals along the circumferential direction of the stator core; each first groove is used for inserting one fixing piece.

The outer circumferential wall of the stator core is provided with at least two first grooves which are distributed at intervals along the circumferential direction of the stator core, and the fixing piece is inserted into the first grooves to play a role in fixing the stator outer diameter support, the stator core and the stator inner diameter support.

In a possible implementation manner, a plurality of second grooves are formed in the outer peripheral wall of the stator core, and the plurality of second grooves are distributed at intervals along the circumferential direction of the stator core; the second grooves and the first grooves are arranged in a staggered mode; the second groove is at least used for accommodating the armature winding.

Through set up a plurality of second recesses along stator core's circumferential direction interval distribution on stator core's periphery wall, the second recess can provide the accommodation space for armature winding. In addition, the second groove and the first groove are arranged in a staggered mode, and interference between the first groove and the second groove can be avoided.

In one possible implementation manner, the second groove is a stepped groove; the ladder groove includes: a first portion and a second portion connected to the first portion; the first portion is close to the outer surface of the stator core, the second portion is far away from the outer surface of the stator core, and the aperture of the first portion is larger than that of the second portion; wherein the first portion is for receiving the armature winding and the second portion is for receiving a liquid.

By designing the second groove as a stepped groove comprising a first portion and a second portion, which are arranged in a stacked manner in the extending direction (i.e. the depth direction) of the second groove, the second portion close to the groove bottom of the second groove can be used for circulating the liquid, and the first portion close to the notch of the second groove can be used for accommodating the armature winding.

In one possible implementation, each set of the armature windings includes: a first sub-winding and a second sub-winding; in the axial direction of the stator core, a gap is formed between the first sub-winding and the second sub-winding, and the gap is used for containing liquid.

By designing each set of armature windings to include the first sub-winding and the second sub-winding, which are stacked in the axial direction of the stator core, and having a gap between the first sub-winding and the second sub-winding, the gap between the first sub-winding and the second sub-winding can be used to contain liquid, so that the contact area between the armature windings and the liquid can be increased, and the temperature rise of the armature windings can be effectively reduced.

In one possible implementation manner, the method further includes: a first sealing plate and a second sealing plate; the first sealing plate and the second sealing plate are respectively positioned on two sides of the stator assembly along the axial direction of the stator assembly and are coaxially arranged with the stator assembly; the first sealing plate is abutted with one side of the stator outer diameter support and one side of the stator inner diameter support, and the second sealing plate is abutted with the other side of the stator outer diameter support and the other side of the stator inner diameter support. By providing the first sealing plate and the second sealing plate which are coaxial with the stator assembly on both sides of the stator assembly, a space for containing liquid can be formed between the stator assembly and the first sealing plate and between the stator assembly and the second sealing plate, respectively.

In one possible implementation manner, the method further includes: a plurality of stator outer diameter baffle plates; the stator outer diameter baffle plates are distributed at intervals along the circumferential direction of the stator outer diameter support, and each stator outer diameter baffle plate is positioned between two adjacent groups of armature windings; the stator outer diameter baffle plates are positioned in a space between the stator outer diameter bracket and the first sealing plate; or the plurality of stator outer diameter baffle plates are positioned in a space between the stator outer diameter bracket and the second sealing plate; alternatively, a portion of the plurality of stator outer diameter barriers may be positioned in a space between the stator outer diameter bracket and the first seal plate, and a remaining portion of the plurality of stator outer diameter barriers may be positioned in a space between the stator outer diameter bracket and the second seal plate.

Through set up a plurality of stator external diameters on stator external diameter support's at least one side surface and separate the baffle, and a plurality of stator external diameters separate the circumferential direction interval distribution of baffle along stator external diameter support, the stator external diameter separates the baffle and can play the effect that blocks liquid and flow, like this, can reduce the flow velocity of liquid in stator structure inside to can increase liquid at the inside flow time of stator structure, play the effect of further reduction temperature rise.

In a possible implementation manner, each stator outer diameter baffle plate is provided with an opening, and adjacent two groups of armature windings are communicated through the openings. Through being provided with the opening on stator external diameter separates the baffle, because every stator external diameter separates the baffle and is located between two sets of adjacent armature windings, like this, can pass the opening between two sets of adjacent armature windings and be linked together, avoid appearing armature winding and need cross stator external diameter and separate the baffle and realize connecting, lead to the great and easy problem that appears dragging of armature winding span.

In one possible implementation, the number of the stator outer diameter baffle plates is eight; the four stator outer diameter baffles are distributed on one side surface of the stator outer diameter support at intervals along the circumferential direction of the stator outer diameter support, and two adjacent stator outer diameter baffles in the four stator outer diameter baffles are spaced by 90 degrees; the other four stator outer diameter baffle plates are distributed on the surface of the other side of the stator outer diameter support at intervals along the circumferential direction of the stator outer diameter support, and two adjacent stator outer diameter baffle plates in the four stator outer diameter baffle plates are spaced at 90 degrees.

The stator external diameter separates setting quantity of baffle more, can be better play stop the effect that liquid flows, like this, can more effectual reduction liquid at the inside flow velocity of stator structure to can more effectual increase liquid play the effect of further reduction temperature rise in the inside flow time of stator structure.

In one possible implementation, projections of the four stator outer diameter baffles on one side surface of the stator outer diameter support along the axial direction of the stator outer diameter support are at least partially misaligned with projections of the four stator outer diameter baffles on the other side surface of the stator outer diameter support along the stator outer diameter support.

In one possible implementation, a projection of the four stator outer diameter baffles on one side surface of the stator outer diameter support in the axial direction of the stator outer diameter support is 45 ° different from a projection of the four stator outer diameter baffles on the other side surface of the stator outer diameter support in the axial direction of the stator outer diameter support in the circumferential direction of the stator outer diameter support.

In one possible implementation manner, the method further includes: a plurality of stator inner diameter baffle plates; the stator inner diameter baffle plates are distributed at intervals along the circumferential direction of the stator inner diameter support; the stator inner diameter baffles are positioned in a space between the stator inner diameter bracket and the first sealing plate; or the plurality of stator inner diameter baffles are positioned in a space between the stator inner diameter bracket and the second sealing plate; alternatively, a portion of the plurality of stator inner diameter baffles is located in a space between the stator inner diameter support and the first seal plate, and the remaining portion of the plurality of stator inner diameter baffles is located in a space between the stator inner diameter support and the second seal plate.

Through set up a plurality of stator internal diameters on stator internal diameter support's at least one side surface and separate the baffle, and a plurality of stator internal diameters separate the circumferential direction interval distribution of baffle along stator internal diameter support, the stator internal diameter separates the baffle and can play the effect that blocks liquid flow, like this, can reduce the flow velocity of liquid in stator structure inside to can increase liquid at the inside flow time of stator structure, play the effect of further reduction temperature rise.

In one possible implementation, the number of the stator inner diameter baffle plates is eight; the four stator inner diameter baffle plates are distributed on one side surface of the stator inner diameter support at intervals along the circumferential direction of the stator inner diameter support, and two adjacent stator inner diameter baffle plates in the four stator inner diameter baffle plates are spaced at an angle of 90 degrees; the other four stator inner diameter baffle plates are distributed on the other side surface of the stator inner diameter support at intervals along the circumferential direction of the stator inner diameter support, and two adjacent stator inner diameter baffle plates in the four stator inner diameter baffle plates are spaced at 90 degrees.

The stator internal diameter separates setting quantity of baffle and is more, can be better play stop the effect that liquid flows, like this, can more effectual reduction liquid at the inside flow velocity of stator structure to can more effectual increase liquid play the effect of further reduction temperature rise in the inside flow time of stator structure.

In one possible implementation manner, the projection of the four stator inner diameter baffle plates on one side surface of the stator inner diameter support along the axial direction of the stator inner diameter support is at least partially not overlapped with the projection of the four stator inner diameter baffle plates on the other side surface of the stator inner diameter support along the axial direction of the stator inner diameter support.

In one possible implementation manner, a projection of the four stator inner diameter baffles on one side surface of the stator inner diameter support along the axial direction of the stator inner diameter support is 45 degrees different from a projection of the four stator inner diameter baffles on the other side surface of the stator inner diameter support along the axial direction of the stator inner diameter support in the circumferential direction of the stator inner diameter support.

In a possible implementation manner, a plurality of first through holes are arranged on the stator outer diameter support, and the first through holes are used for communicating two sides of the stator outer diameter support. The plurality of first through holes are formed in the stator outer diameter support, so that a space formed between the stator assembly and the first sealing plate and used for containing liquid can be communicated with a space formed between the stator assembly and the second sealing plate and used for containing liquid, and the flowing area and the flowing range of the liquid in the stator structure can be increased.

In a possible implementation manner, a plurality of second through holes are formed in the stator inner diameter support, and the second through holes are used for communicating two sides of the stator inner diameter support. Through the plurality of first through holes formed in the stator inner diameter support, the space formed between the stator assembly and the first sealing plate and used for containing liquid can be communicated with the space formed between the stator assembly and the second sealing plate and used for containing liquid, and therefore the flowing area and the flowing range of the liquid inside the stator structure can be enlarged.

In one possible implementation manner, the method further includes: an outer housing; the shell body cover is established on the periphery wall of stator external diameter support, just the shell body with stator external diameter support is fixed mutually. The shell body can play the protective action to stator external diameter support and stator module.

In a possible implementation manner, the outer shell is provided with at least one liquid inlet and at least one liquid outlet; and the liquid inlet and the liquid outlet are communicated with the second groove. Through set up at least one inlet and at least one liquid outlet that are linked together with the second recess respectively on the shell body, like this, liquid passes through the inlet and gets into between stator external diameter support and the first closing plate and after the space between stator external diameter support and the second closing plate, rethread second recess gets into the space between stator internal diameter support and the first closing plate and between stator internal diameter support and the second closing plate, rethread second recess gets into the space between stator external diameter support and the first closing plate and between stator external diameter support and the second closing plate, finally flow out stator structure through the liquid outlet.

In a possible implementation manner, the liquid inlet and the liquid outlet are arranged oppositely in a vertical direction; and the liquid inlet is arranged at a position higher than the liquid outlet. Through with inlet and liquid outlet relative setting in vertical direction, and the inlet set up the position and be higher than the position that sets up of liquid outlet, liquid can utilize action of gravity to flow from the liquid outlet after passing through the inlet entering stator structure is inside, can reduce like this to the inside hydraulic pressure requirement of stator structure, utilizes action of gravity can be fine realization liquid at the inside abundant flow of stator structure.

In one possible implementation manner, the stator core, the stator outer diameter support and the stator inner diameter support are integrally cast.

In a possible implementation manner, the stator core, the stator outer diameter bracket, the stator inner diameter bracket, the at least two fixing pieces, the plurality of stator outer diameter baffles and the plurality of stator inner diameter baffles are all integrally cast.

In a second aspect, embodiments of the present application provide an axial-flux electric machine comprising: at least one rotor structure and at least one stator structure as described in any one of the above; the stator structure and the rotor structure are alternately arranged along an axial direction of the axial flux motor.

The axial flux motor that this application embodiment provided, this axial flux motor includes stator structure, be provided with two at least fixings along stator core's circumferential direction interval distribution in this stator structure, through setting up every fixer between adjacent two sets of armature windings, every fixer passes stator external diameter support along stator core's radial direction, stator core and stator internal diameter support, in order to play with stator external diameter support, stator core and the fixed effect as an organic whole of stator internal diameter support, compare in the mode of taking interior outer lane interference installation between stator external diameter support and the stator core and between stator internal diameter support and the stator core among the prior art, this application embodiment sets up a plurality of fixings in stator core's circumferential direction, pass stator external diameter support along stator core's radial direction through a plurality of fixings, stator core and stator internal diameter support are with stator external diameter support, stator core and stator internal diameter support are fixed as an organic whole, can promote stator structure's bulk strength, thereby can promote stator structure's bulk reliability, and then can promote axial flux motor's bulk reliability. In addition, the fixing strength of the fixing member to the stator outer diameter support, the stator core and the stator inner diameter support is high, so that the coaxiality of the stator outer diameter support, the stator core and the stator inner diameter support can be further ensured, and the mass production of the stator structure can be facilitated.

That is to say, through set up above-mentioned stator structure in axial flux motor, because of the reliability of stator structure is higher among the axial flux motor to make axial flux motor's reliability higher, can optimize axial flux motor's performance like this.

In a third aspect, embodiments of the present application provide a powertrain including an axial-flux electric machine as described above.

The power assembly that this application embodiment provided, this power assembly includes axial flux motor at least, this axial flux motor includes stator structure at least, be provided with two at least fixings along stator core's circumferential direction interval distribution in this stator structure, through setting up every fixer between adjacent two sets of armature windings, every fixer passes stator external diameter support along stator core's radial direction, stator core and stator internal diameter support, in order to play with stator external diameter support, stator core and stator internal diameter support fix the effect as an organic whole, compare in the mode that takes interior outer lane interference fit between stator external diameter support and the stator core and between stator internal diameter support and the stator core among the prior art, this application embodiment sets up a plurality of fixings in stator core's circumferential direction, pass stator external diameter support along stator core's radial direction through a plurality of fixings, stator core and stator internal diameter support are with stator external diameter support, stator core and stator internal diameter support are fixed as an organic whole, the bulk strength of stator structure can be promoted, thereby can promote the bulk reliability of stator structure, and then can promote axial flux motor's bulk reliability. In addition, the fixing strength of the fixing member to the stator outer diameter support, the stator core and the stator inner diameter support is high, so that the coaxiality of the stator outer diameter support, the stator core and the stator inner diameter support can be further ensured, and the mass production of the stator structure can be facilitated.

That is to say, through set up above-mentioned axial flux motor in the power assembly, because of the reliability of stator structure is higher among the axial flux motor to make axial flux motor's reliability higher, and then make the whole reliability of power assembly higher.

In a fourth aspect, an embodiment of the present application provides a vehicle, which at least includes: the front wheel, the rear wheel, the vehicle body and the axial flux motor; the vehicle body is connected between the front wheel and the rear wheel, and the axial-flux motor is mounted on the vehicle body.

The vehicle provided by the embodiment of the application comprises at least an axial flux motor, the axial flux motor at least comprises a stator structure, at least two fixing pieces distributed at intervals along the circumferential direction of a stator core are arranged in the stator structure, each fixing piece is arranged between two adjacent groups of armature windings, each fixing piece penetrates through a stator outer diameter support, a stator core and a stator inner diameter support along the radial direction of the stator core, and the stator outer diameter support, the stator core and the stator inner diameter support are fixed into a whole. Moreover, the fixing strength of the fixing piece to the stator outer diameter support, the stator core and the stator inner diameter support is high, so that the coaxiality of the stator outer diameter support, the stator core and the stator inner diameter support can be further ensured, and the mass production of the stator structure can be facilitated.

That is to say, through set up above-mentioned axial flux motor in the vehicle, because of the reliability of stator structure is higher among the axial flux motor to make axial flux motor's reliability higher, and then make the whole reliability of vehicle higher, can optimize the performance and the security performance of vehicle like this.

Drawings

Fig. 1 is a schematic overall structural diagram of a stator structure according to an embodiment of the present application;

fig. 2 is a schematic overall structural diagram of a stator structure according to an embodiment of the present application;

fig. 3 is a schematic exploded view of a stator structure according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a stator core and a fixing element in a stator structure according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a stator core and a fixing element in a stator structure according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a stator core and a fixing element in a stator structure according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a first groove and a second groove on a stator structure according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a first groove and a second groove on a stator structure according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an armature winding in a stator structure according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an armature winding in a stator structure according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an armature winding in a stator structure according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of an armature winding in a stator structure provided in an embodiment of the present application;

fig. 13 is a schematic structural diagram of an armature winding in a stator structure according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a stator core, a stator outer diameter bracket and a stator inner diameter bracket in a stator structure according to an embodiment of the present disclosure;

fig. 15 is a schematic structural diagram of a stator core, a stator outer diameter bracket and a stator inner diameter bracket in a stator structure according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a stator assembly, a stator outer diameter support, a stator inner diameter support, and an outer housing in a stator structure according to an embodiment of the present disclosure;

fig. 17 is a schematic structural diagram of a stator assembly, a stator outer diameter support, a stator inner diameter support, and an outer housing in a stator structure according to an embodiment of the present disclosure;

fig. 18 is a schematic structural view of a stator core, a stator outer diameter bracket and a stator inner diameter bracket in a stator structure according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a stator core, a stator outer diameter bracket and a stator inner diameter bracket in a stator structure according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a stator core, a stator outer diameter bracket and a stator inner diameter bracket in a stator structure according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of a stator core, a stator outer diameter bracket, and a stator inner diameter bracket in a stator structure according to an embodiment of the present application.

Description of reference numerals:

100-stator structure; 110-a stator assembly; 111-a stator core;

1111-a first groove; 1112-a second groove; 1112A-first portion;

1112B-a second portion; 112-armature windings; 112A-armature winding slot portion;

112B-armature winding ends; 1121 — a first armature winding; 1121A-first sub-winding;

1121B-second sub-winding; 1122-a second armature winding; 1123-third armature winding;

1124-fourth armature winding; 1125-fifth armature winding; 1126-sixth armature winding;

1127-seventh armature winding; 1128-eighth armature winding; 1129-gap;

120-stator outer diameter support; 121 — a first sub-via; 122-a second sub-via;

123-a third sub-via; 124-fourth sub-via; 130-stator inner diameter support;

131-a fifth sub-via; 132-a sixth sub-via; 133-a seventh sub-via;

134-eighth sub-via; 140-a fixture; 150-a first seal plate;

160-a second sealing plate; 170-stator outer diameter baffle plate; 171-opening;

1711-a first stator outer diameter baffle; 1712-second stator outer diameter baffle plate; 1713-third stator outer diameter baffle plate;

1714-fourth stator outer diameter baffle plate; 1715-fifth stator outer diameter baffle plate; 1716-sixth stator external diameter baffle plate;

1717-seventh stator outer diameter baffle plate; 1718-eighth stator outer diameter baffle plate; 180-stator inner diameter baffle plate;

1811-first stator inner diameter baffle plate; 1812-second stator inner diameter baffle plate; 1813-a third stator inner diameter baffle plate;

1814-fourth stator inner diameter baffle plate; 1815-fifth stator inner diameter baffle plate; 1816-sixth stator inner diameter baffle;

190-an outer shell; 191-liquid inlet; 1911-first loading port;

1912-second inlet; 192-a liquid outlet; 1921-a first exit port;

1922-a second outlet; 1001-first area; 1002-second area.

Detailed Description

The terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the application, as the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Electric motors (i.e., electric machines) generally convert electrical energy into mechanical work by generating torque. Electric vehicles (including hybrid vehicles) employ electric motors, such as induction motors and permanent magnet motors, to drive the vehicle and capture braking energy when used as a generator. Generally, an electric motor includes a rotor that rotates during operation and a stationary stator. The rotor may contain a plurality of permanent magnets and rotate relative to the fixed stator. The rotor is connected to a rotor shaft, which also rotates with the rotor. The rotor including the permanent magnets is separated from the stator by a predetermined air gap. The stator includes conductors in the form of wire windings. When electrical energy is applied through the wire windings, a magnetic field is generated. When electrical energy or power is fed into the electrically conductive windings of the stator, power can be transferred over the air gap through the magnetic flux, creating a torque that acts on the permanent magnets in the rotor. In this way, mechanical power may be transferred to or extracted from the rotating rotor shaft. In an electric vehicle, the rotor therefore transmits torque through the gear set to the drive wheels of the vehicle via the rotating shaft.

Two common types of electrical machines currently include radial flux machines and axial flux machines. In radial flux machines, among other things, the rotor and stator are typically positioned in a concentric or nested configuration so that when the stator is energized, it generates magnetic flux that extends radially from the stator to the rotor. Thus, the electrically conductive windings in the stator are typically arranged perpendicular to the axis of rotation, thereby generating a magnetic field that is oriented in a radial direction from the axis of rotation (along the rotor shaft). Whereas in an axial flux machine a magnetic field parallel to the axis of rotation is generated by a winding of electrically conductive wire in the stator, so that the magnetic flux extends parallel to the axis of rotation (parallel to the rotor shaft). In certain applications, an axial flux machine is desirable because it is relatively light, produces increased power, and has compact dimensions compared to a radial flux machine, and thus, in application scenarios where there are limitations on size, weight, etc., such as in electric vehicle drive motor applications, an axial flux machine has significant application advantages over a radial flux machine at the same rotational speed.

In the related art, a stator structure of an axial flux motor generally includes a stator assembly, a first end cap, and a second end cap, where the stator assembly includes an inner support, a stator, and an outer housing, which are sequentially nested from inside to outside along a radial direction, the stator includes a stator core and a stator winding wound on the stator core, and the stator core is a structure that continuously surrounds the inner support. The first end cover and the second end cover are respectively arranged at two ends of the stator assembly along the axial direction, the first end cover, the inner side shell, the second end cover and the outer side shell are sequentially in sealing connection and jointly enclose to form a cooling cavity, and the stator core is located in the cooling cavity.

However, in the above solution, the overall strength of the stator structure is poor, resulting in a low reliability of the axial flux machine.

Based on this, the embodiments of the present application provide a new stator structure and an axial-flux motor having the stator structure, which can be applied to a vehicle, so as to solve the above technical problems.

The specific structure of the stator structure and the axial-flux motor having the stator structure will be described in detail below by taking different embodiments as examples with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present application provides a stator structure 100, where the stator structure 100 may be applied to an axial-flux motor, and specifically, referring to fig. 3, the stator structure 100 may include at least: stator assembly 110, stator outer diameter support 120, and stator inner diameter support 130 are coaxially disposed, wherein, in a radial direction of stator assembly 110, stator outer diameter support 120 may be located at an outer side of stator assembly 110, and stator inner diameter support 130 may be located at an inner side of stator assembly 110.

The stator assembly 110 may include: a stator core 111 and at least two sets of armature windings 112, wherein the at least two sets of armature windings 112 are distributed at intervals along the circumferential direction of the stator core 111, and the at least two sets of armature windings 112 are respectively wound on the stator core 111.

As shown with continued reference to fig. 4-6, the stator structure 100 may further include: at least two fixing pieces 140, the at least two fixing pieces 140 may be spaced apart along a circumferential direction of the stator core 111, wherein each fixing piece 140 may be positioned between adjacent two sets of armature windings 112, and each fixing piece 140 may pass through the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 along a radial direction of the stator core 111 to fix the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130.

Compared with the mode of adopting inner and outer ring interference installation between stator outer diameter support 120 and stator core 111 and between stator inner diameter support 130 and stator core 111 in the prior art, this application embodiment sets up a plurality of fixings 140 in the circumferential direction of stator core 111, pass stator outer diameter support 120 along the radial direction of stator core 111 through a plurality of fixings 140, stator core 111 and stator inner diameter support 130 are with stator outer diameter support 120, stator core 111 and stator inner diameter support 130 are fixed as an organic whole, can promote the bulk strength of stator structure 100, thereby can promote the bulk reliability of stator structure 100, and then can promote the bulk reliability of axial magnetic current motor. Further, since the fixing strength of the fixing member 140 to the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 is high, the coaxiality of the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 can be further ensured, which is more advantageous for mass production of the stator structure 100.

It should be noted that, in the embodiment of the present application, the radial direction of the stator assembly 110 refers to a direction along the diameter of the stator assembly 110, the circumferential direction of the stator assembly 110 refers to a direction along the outer circumferential wall of the stator assembly 110, and the axial direction of the stator assembly 110 refers to a direction along the central axis of the stator assembly 110.

In the embodiment of the present application, at least two first grooves 1111 may be formed in the outer circumferential wall of the stator core 111, and the at least two first grooves 1111 may be spaced apart from each other along the circumferential direction of the stator core 111, wherein each first groove 1111 is used for inserting one fixing member 140. At least two first grooves 1111 are formed in the outer circumferential wall of the stator core 111 and spaced apart from each other in the circumferential direction of the stator core 111, and the fixing member 140 is inserted into the first grooves 1111 to fix the stator outer diameter holder 120, the stator core 111, and the stator inner diameter holder 130.

It should be noted that, referring to fig. 4 and 7, in the embodiment of the present application, two rows of first grooves 1111 may be spaced apart along the circumferential direction of the stator core 111, and specifically, the two rows of first grooves 1111 may be spaced apart in the axial direction of the stator core 111.

In some embodiments, as shown in fig. 5 and 6, the number of the first grooves 1111 in each row may be four, the four first grooves 1111 may be uniformly spaced apart from each other on the outer circumferential wall of the stator core 111 in the circumferential direction of the stator core 111, specifically, the adjacent two first grooves 1111 of the four first grooves 1111 may be spaced apart from each other by 90 °, and the fixing member 140 is inserted into the first grooves 1111 in the radial direction of the stator core 111.

In addition, in order to further increase the structural stability, the two rows of the first grooves 1111 may be arranged in a relatively staggered manner. That is, the projection of the four first grooves 1111 of one row on the stator core 111 may not overlap with the projection of the four first grooves 1111 of the other row on the stator core 111. For example, as shown in fig. 5 to 7, a projection of the four first grooves 1111 of one row on the stator core 111 may be spaced 45 ° from a projection of the four first grooves 1111 of the other row on the stator core 111.

As shown in fig. 7 and 8, the outer circumferential wall of the stator core 111 may further have a plurality of second grooves 1112, and the plurality of second grooves 1112 may be distributed at intervals along the circumferential direction of the stator core 111, wherein the second grooves 1112 and the first grooves 1111 are staggered relatively, and the second grooves 1112 may be at least configured to receive the armature winding 112. The second grooves 1112 are formed in the outer circumferential wall of the stator core 111 and spaced apart from each other in the circumferential direction of the stator core 111, so that the second grooves 1112 can provide a space for accommodating the armature winding 112. In addition, the second grooves 1112 and the first grooves 1111 are staggered relatively, so that interference between the first grooves 1111 and the second grooves 1112 can be avoided.

It will be appreciated that in an axial flux motor, the armature windings 112 in the stator structure 100 may be of an integrated construction for a smaller package.

Referring to fig. 7, in the embodiment of the present application, two rows of second grooves 1112 may be spaced along the circumferential direction of the stator core 111, and specifically, the two rows of second grooves 1112 may be spaced in the axial direction of the stator core 111. The number of second grooves 1112 in each row may be plural, and the first grooves 1111 may be uniformly distributed between two second grooves 1112.

As shown in fig. 7, in the embodiment of the present application, the second groove 1112 may be a stepped groove, and specifically, the stepped groove may include: a first portion 1112A and a second portion 1112B connected to the first portion 1112A, wherein the first portion 1112A is relatively close to the outer surface of the stator core 111, the second portion 1112B is relatively far from the outer surface of the stator core 111,

the aperture of the first portion 1112A may be larger than the aperture of the second portion 1112B, i.e., the slot width of the first portion 1112A may be larger than the slot width of the second portion 1112B, wherein the first portion 1112A may be configured to receive the armature winding 112 and the second portion 1112B may be configured to receive a liquid (e.g., a coolant).

Referring to fig. 7, the slot width of the first portion 1112A is greater than the slot width of the second portion 1112B, such that the armature winding 112 is prevented from falling into the second portion 1112B when the armature winding 112 is placed in the first portion 1112A. In this way, the placement of the armature winding 112 and the flow of liquid within the second portion 1112B do not interfere with each other, and the process is simple and easy to implement.

In addition, at least one blocking part may be further disposed at the notch position of the second groove 1112 to form a semi-open groove. The smaller the opening of the notch of the second groove 1112, the smaller the equivalent air gap, the larger the energy of the magnetic field formed by the armature winding 112, so that the blocking portion can play a role of enhancing the electromagnetic performance, which is beneficial to the axial magnetic field motor 200 with the stator structure 100 to generate larger torque and power.

In the embodiment of the present application, the liquid flowing in the stator structure 100 is generally a cooling liquid, so as to achieve the effect of cooling. For example, the liquid may be cooling oil, etc., which is not limited in the embodiments of the present application.

By designing the second groove 1112 as a stepped groove including a first portion 1112A and a second portion 1112B, and arranging the first portion 1112A and the second portion 1112B stacked in the extending direction (i.e., the depth direction) of the second groove 1112, the second portion 1112B near the groove bottom of the second groove 1112 can be used for circulating the liquid, and the first portion 1112A near the notch of the second groove 1112 can be used for accommodating the armature winding 112. Alternatively, in some embodiments, each set of armature windings 112 may include: a first sub-winding 1121A and a second sub-winding 1121B (see fig. 12), wherein, in the axial direction of the stator core 111, there may be a gap 1129 between the first sub-winding 1121A and the second sub-winding 1121B, the gap 1129 being for containing liquid.

By designing each set of the armature windings 112 to include the first sub-winding 1121A and the second sub-winding 1121B, the first sub-winding 1121A and the second sub-winding 1121B are disposed stacked in the axial direction of the stator core 111, and moreover, with the gap 1129 between the first sub-winding 1121A and the second sub-winding 1121B, the gap 1129 between the first sub-winding 1121A and the second sub-winding 1121B can be used to contain liquid. Because the power density of the axial flux motor is high, the axial flux motor generates much heat during working, and the design can increase the contact area between the armature winding 112 and liquid, thereby effectively reducing the temperature rise of the armature winding 112 and improving the heat dissipation effect of the axial flux motor to a great extent.

Specifically, in a practical application scenario, referring to fig. 13, each set of armature windings 112 may include an armature winding slot portion 112A and an armature winding end portion 112B, and after each set of armature windings 112 is completed to be offline, the armature winding end portions 112B are separated from each other by a gap 1129 in the axial direction of the stator core 111 by using a tool without affecting the armature winding slot portion 112A, so that each set of armature windings 112 on both sides of the stator core 111 becomes a double-layer structure including the first sub-winding 1121A and the second sub-winding 1121B. In this way, liquid (i.e., cooling oil) can flow through the gap 1129 between the first sub-winding 1121A and the second sub-winding 1121B that are spaced apart, so that the temperature rise of the armature winding 112, particularly, the temperature rise at the armature winding end portion 112B can be effectively reduced.

Note that, when the intermediate isolation operation is performed on the armature winding end portion 112B in the axial direction of the stator core 111, it is after the armature winding 112 is wound down to the second groove 1112, so that the wire arrangement in the armature winding 112 is not affected. In addition, the armature winding end portion 112B is spaced therefrom by a gap 1129 in the axial direction of the stator core 111 using a tool, and the gap 1129 is minute so as not to cause the armature winding end portion 112B to abut the stator outer diameter bracket 120 and the stator inner diameter bracket 130 and the first sealing plate 150 and the second sealing plate 160. Moreover, the process is easy to operate without adding complexity to the manufacture of the stator structure 100. After the armature winding end portion 112B is separated from the middle along the axial direction of the stator core 111, the cooling oil can directly contact the center of the armature winding end portion 112B with a large area where heat is originally accumulated, so that the temperature rise of the armature winding 112 is effectively reduced, and the stable operation of the axial flux motor is ensured.

Referring to fig. 3, in the embodiment of the present application, the stator structure 100 may further include: a first seal plate 150 and a second seal plate 160, wherein the first seal plate 150 and the second seal plate 160 may be respectively located at both sides of the stator assembly 110 in an axial direction of the stator assembly 110, and the first seal plate 150 and the second seal plate 160 are coaxially disposed with the stator assembly 110. In the present embodiment, the first seal plate 150 is in contact with one side of the stator outer diameter support 120 and the stator inner diameter support 130, and the second seal plate 160 is in contact with the other side of the stator outer diameter support 120 and the stator inner diameter support 130.

By providing the first and

second sealing plates

150 and 160 coaxial with the stator assembly 110 at both sides of the stator assembly 110, spaces for containing liquid can be formed between the stator assembly 110 and the first sealing plate 150 and between the stator assembly 110 and the second sealing plate 160, respectively.

In some embodiments, as shown in fig. 3, the stator structure 100 may further include: a plurality of stator outer diameter spacers 170, wherein the plurality of stator outer diameter spacers 170 may be spaced apart along a circumferential direction of the stator outer diameter support 120. Also, each stator outer diameter barrier 170 may be located between two adjacent sets of armature windings 112. The stator assembly 110 is sealed by the first sealing plate 150 and the second sealing plate 160, and the flow direction of the liquid is adjusted by the stator outer diameter baffle plate 170 to control the oil path, so that the stator structure 100 is directly cooled, and the cooling effect on the stator structure 100 can be greatly enhanced while the impact pressure of the liquid on the first sealing plate 150 and the second sealing plate 160 is reduced.

It should be noted that, the specific location of the plurality of stator outer diameter baffle plates 170 on the stator outer diameter support 120 may include, but is not limited to, the following possible implementation manners:

one possible implementation is: a plurality of stator outer diameter spacers 170 may be located in the space between the stator outer diameter bracket 120 and the first seal plate 150.

Another possible implementation is: a plurality of stator outer diameter spacers 170 may be located in the space between the stator outer diameter bracket 120 and the second seal plate 160.

Yet another possible implementation is: a portion of the plurality of stator outer diameter baffles 170 may be located in a space between the stator outer diameter bracket 120 and the first seal plate 150, and the remaining portion of the plurality of stator outer diameter baffles 170 may be located in a space between the stator outer diameter bracket 120 and the second seal plate 160.

Through set up a plurality of stator external diameter baffle 170 on at least one side surface at stator external diameter support 120, and a plurality of stator external diameter baffle 170 along stator external diameter support 120's circumferential direction interval distribution, stator external diameter baffle 170 can play the effect that blocks liquid and flow, like this, can reduce the flow velocity of liquid in stator structure 100 inside to can increase the flow time of liquid in stator structure 100 inside, play the effect of further reducing the temperature rise. In other words, the stator outer diameter baffle 170 can buffer the impact force of liquid (e.g., cooling medium) to a specific direction, and has a turbulent flow effect to enhance the convection heat transfer and improve the heat dissipation effect. In this way, the axial-flux motor having stator structure 100 can be kept in a good cooling state, and high power density design of the axial-flux motor is facilitated.

On the basis of the above embodiment, referring to fig. 3, each of the stator outer diameter baffle plates 170 may have an opening 171, and adjacent two sets of armature windings 112 may communicate with each other through the opening 171. Through being provided with opening 171 on stator external diameter baffle 170, because every stator external diameter baffle 170 is located between two sets of adjacent armature windings 112, like this, can pass opening 171 and be linked together between two sets of adjacent armature windings 112, avoid appearing armature windings 112 and need cross stator external diameter baffle 170 and realize connecting, lead to armature windings 112 span great and appear dragging's problem easily. In addition, two adjacent sets of armature windings 112 are separated by the stator outer diameter baffle plate 170 and communicated with each other through the opening 171 of the stator outer diameter baffle plate 170, so that a placing space can be provided for the stator outer diameter baffle plate 170.

Specifically, in the embodiment of the present application, the number of the stator outer diameter baffles 170 may be eight, as shown in fig. 3, wherein four stator outer diameter baffles 170 may be spaced apart from each other at one side surface of the stator outer diameter support 120 along the circumferential direction of the stator outer diameter support 120, and further, adjacent two stator outer diameter baffles 170 among the four stator outer diameter baffles 170 may be spaced apart from each other by 90 °. Another four stator outer diameter spacers 170 may be spaced apart from each other on the other side surface of the stator outer diameter support 120 in the circumferential direction of the stator outer diameter support 120, and adjacent two stator outer diameter spacers 170 among the four stator outer diameter spacers 170 may be spaced apart by 90 °.

Stator external diameter separates that baffle 170 sets up quantity more, can be better play stop the effect that liquid flows, like this, can more effectual reduction liquid at the inside flow velocity of stator structure 100 to can more effectual increase liquid at the inside flow time of stator structure 100, play the effect of further reduction temperature rise.

In addition, in one possible implementation, a projection of four stator outer diameter baffles 170 located on one side surface of stator outer diameter support 120 along the axial direction of stator outer diameter support 120 may be at least partially non-coincident with a projection of four stator outer diameter baffles 170 located on the other side surface of stator outer diameter support 120 along the axial direction of stator outer diameter support 120.

Note that the at least partial misalignment means that the projection of the four stator outer diameter barriers 170 on the one side surface of the stator outer diameter support 120 in the axial direction of the stator outer diameter support 120 may be completely misaligned with the projection of the four stator outer diameter barriers 170 on the other side surface of the stator outer diameter support 120 in the axial direction of the stator outer diameter support 120, or the projection of the four stator outer diameter barriers 170 on the one side surface of the stator outer diameter support 120 in the axial direction of the stator outer diameter support 120 may be only partially overlapped with the projection of the four stator outer diameter barriers 170 on the other side surface of the stator outer diameter support 120 in the axial direction of the stator outer diameter support 120, and the other portions are misaligned.

In other words, the projections of the four stator outer diameter barriers 170 located on one side surface of the stator outer diameter support 120 in the axial direction of the stator outer diameter support 120 may not completely coincide with the projections of the four stator outer diameter barriers 170 located on the other side surface of the stator outer diameter support 120 in the axial direction of the stator outer diameter support 120. If the two sides of the stator outer diameter support 120 are completely overlapped, the liquid on the two sides of the stator outer diameter support cannot be communicated with each other.

For example, in some embodiments, as shown in fig. 14, a projection of four stator outer diameter baffles 170 on one side surface of stator outer diameter support 120 in the axial direction of stator outer diameter support 120 may be 45 ° different from a projection of four stator outer diameter baffles 170 on the other side surface of stator outer diameter support 120 in the axial direction of stator outer diameter support 120 in the circumferential direction of stator outer diameter support 120.

In addition, the stator outer diameter baffle 170 divides the stator core 111 into four parts, so that four parts can be formed in an oil path (i.e., liquid is formed in the stator structure 100), and thus the flow of the liquid can form an S-shaped loop, thereby effectively increasing the contact area between the liquid and the armature winding 112 and improving the heat dissipation effect of the armature winding 112.

For the stator structure 100 with the number of the stator outer diameter baffle plates 170 being eight, the four stator outer diameter baffle plates 170 at each side divide the armature windings 112 wound around the stator core 111 at the side into four groups, one armature winding 112 is arranged at intervals of 90 degrees at one side, and the armature windings 112 at two sides are distributed in a staggered way of 45 degrees.

As shown in fig. 16 and 17, eight sets of armature windings 112 are wound on the stator core 111, and the eight sets of armature windings 112 are respectively a first armature winding 1121, a second armature winding 1122, a third armature winding 1123, a fourth armature winding 1124, a fifth armature winding 1125, a sixth armature winding 1126, a seventh armature winding 1127 and an eighth armature winding 1128, wherein the first armature winding 1121, the second armature winding 1122, the third armature winding 1123 and the fourth armature winding 1124 are located on one side surface of the stator outer diameter bracket 120, and the fifth armature winding 1125, the sixth armature winding 1126, the seventh armature winding 1127 and the eighth armature winding 1128 are located on the other side surface of the stator outer diameter bracket 120.

It can be understood that the four sets of armature windings 112 (i.e., the first armature winding 1121, the second armature winding 1122, the third armature winding 1123, and the fourth armature winding 1124) located on one side surface of the stator outer diameter support 120 are axially offset from the four sets of armature windings 112 (i.e., the fifth armature winding 1125, the sixth armature winding 1126, the seventh armature winding 1127, and the eighth armature winding 1128) located on the other side surface of the stator outer diameter support 120 by an angle of 90 °, so that the oil passages can implement an axially offset design, which helps to implement the flow of cooling oil between the two axial layers of armature windings 112.

The specific number of the armature windings 112 may be flexibly set according to the requirements of the actual application scenario, the number of the stator outer diameter baffle plates 170, and the like, which is not limited in the embodiment of the present application. For example, in the embodiment of the present application, the number of the armature windings 112 may also be two, four, six, or ten, and so on. This application embodiment is through dividing into a plurality of module with armature winding 112, and each armature winding 112 each other not cross-over connection, makes it dodge the space of installation stator external diameter baffle 170, and stator external diameter baffle 170 and armature winding 112 mutually noninterfere, and the installation is simple, easily the operation.

The axial field motor shown in fig. 9, 10 and 11 has four pairs of poles, and in some other embodiments, taking the number of the armature windings 112 as N groups as an example, when the number of the armature windings 112 is N, the axial field motor is an N/2 pair pole motor, and it may be designed that one side of the stator outer diameter baffle plate 170 has N/2 groups of armature windings 112, and there is no extra jumper wire between two adjacent groups of armature windings 112 except for the connection of the leading wires.

In addition, the design that the mechanical angle difference of the armature windings 112 on the two axial sides of the stator outer diameter baffle plate 170 is 45 degrees can also be extended to other pole pair motor schemes, specifically, for a motor with N/2 pairs of poles, the mechanical angle difference of the two axial layers of armature windings 112 can be designed to be 360 degrees/P or 360 degrees/2P, and at this time, the phase difference of the two axial layers of armature windings 112 on the magnetic field is the same or 180 degrees although the mechanical angle difference is a certain mechanical angle.

Referring to fig. 3, in the embodiment of the present application, the stator structure 100 may further include: a plurality of stator inner diameter baffles 180, wherein the plurality of stator inner diameter baffles 180 may be spaced apart along a circumferential direction of the stator inner diameter support 130.

It should be noted that, the specific location of the plurality of stator inner diameter baffles 180 on the stator inner diameter support 130 may include, but is not limited to, the following possible implementation manners:

one possible implementation is: a plurality of stator inner diameter spacers 180 may be located in a space between the stator inner diameter bracket 130 and the first seal plate 150.

Another possible implementation is: a plurality of stator inner diameter spacers 180 may be located in the space between the stator inner diameter support 130 and the second seal plate 160.

Yet another possible implementation is: some of the plurality of stator inner diameter spacers 180 may be located in a space between the stator inner diameter bracket 130 and the first seal plate 150, and the remaining of the plurality of stator inner diameter spacers 180 may be located in a space between the stator inner diameter bracket 130 and the second seal plate 160.

Through set up a plurality of stator internal diameters on at least one side surface at stator internal diameter support 130 and separate baffle 180, and a plurality of stator internal diameters separate baffle 180 along the circumferential direction interval distribution of stator internal diameter support 130, stator internal diameter separates baffle 180 and can play the effect that blocks liquid and flow, like this, can reduce the flow velocity of liquid in stator structure 100 inside to can increase the flow time of liquid in stator structure 100 inside, play the effect that further reduces the temperature rise.

Specifically, in the embodiment of the present application, the number of the stator inner diameter baffles 180 is eight, as shown in fig. 3, wherein four stator inner diameter baffles 180 may be spaced apart from each other at a side surface of the stator inner diameter support 130 along a circumferential direction of the stator inner diameter support 130, and further, adjacent two stator inner diameter baffles 180 among the four stator inner diameter baffles 180 may be spaced apart from each other by 90 °. Another four stator inner diameter partition plates 180 may be spaced apart from each other on the other side surface of the stator inner diameter support 130 in the circumferential direction of the stator inner diameter support 130, and adjacent two stator inner diameter partition plates 180 among the four stator inner diameter partition plates 180 may be spaced apart by 90 °.

Stator internal diameter separates that baffle 180 sets up quantity and is more, can be better play stop the effect that liquid flows, like this, can be more effectual reduction liquid at the inside flow velocity of stator structure 100 to can more effectual increase liquid play the effect of further reduction temperature rise in the inside flow time of stator structure 100.

In one possible implementation manner, projections of the four stator inner diameter partition plates 180 on one side surface of the stator inner diameter support 130 along the axial direction of the stator inner diameter support 130 may be at least partially misaligned with projections of the four stator inner diameter partition plates 180 on the other side surface of the stator inner diameter support 130 along the axial direction of the stator inner diameter support 130.

Illustratively, as shown in fig. 3, a projection of the four stator inner diameter baffles 180 located on one side surface of the stator inner diameter support 130 in the axial direction of the stator inner diameter support 130 may be different from a projection of the four stator inner diameter baffles 180 located on the other side surface of the stator inner diameter support 130 in the axial direction of the stator inner diameter support 130 by 45 ° in the circumferential direction of the stator inner diameter support 130.

It is understood that, in the embodiment of the present application, a plurality of first through holes (for example, the first sub through hole 121, the second sub through hole 122, the third sub through hole 123, or the fourth sub through hole 124 in fig. 14 and 15) may be further provided on the stator outer diameter support 120, and the first through holes are used for communicating two sides of the stator outer diameter support 120. By providing the plurality of first through holes on the stator outer diameter support 120, it is possible to facilitate communication between the space for containing liquid formed between the stator assembly 110 and the first sealing plate 150 and the space for containing liquid formed between the stator assembly 110 and the second sealing plate 160, that is, to enable the liquid to flow in the axial direction of the stator structure 100, so that the flow area and the flow range of the liquid inside the stator structure 100 can be increased.

Similarly, the stator inner diameter support 130 may further include a plurality of second through holes (for example, a fifth sub through hole 131, a sixth sub through hole 132, a seventh sub through hole 133, or an eighth sub through hole 134 in fig. 14 and 15), and the second through holes are used for communicating two sides of the stator inner diameter support 130. By providing the plurality of first through holes on the stator inner diameter support 130, it is also possible to facilitate communication between the space for containing liquid formed between the stator assembly 110 and the first sealing plate 150 and the space for containing liquid formed between the stator assembly 110 and the second sealing plate 160, so that liquid can flow in the axial direction of the stator structure 100, and thus a flow area and a flow range of liquid inside the stator structure 100 can be increased.

Of course, it is easily understood that, in the embodiment of the present application, the first through hole and the second through hole may not be provided, in which case, both sides of the stator outer diameter support 120 and both sides of the stator inner diameter support 130 cannot be communicated, and the liquid flows independently only on one side of the stator assembly 110.

Furthermore, in the embodiment of the present application, the stator structure 100 may further include: and an outer housing 190, wherein the outer housing 190 can be sleeved on the outer circumferential wall of the stator outer diameter support 120, and the outer housing 190 can be fixed with the stator outer diameter support 120. In this way, outer housing 190 can protect stator outer diameter support 120 and stator assembly 110.

It is understood that, in the embodiment of the present application, the stator core 111 is fixed to the outer case 190 by the stator outer diameter bracket 120 and the stator inner diameter bracket 130.

As shown in fig. 16 and 17, the outer housing 190 may have at least one inlet 191 and at least one outlet 192, and the inlet 191 and the outlet 192 may both communicate with the second groove 1112. Through the at least one liquid inlet 191 and the at least one liquid outlet 192 which are respectively communicated with the second groove 1112 are formed in the outer shell 190, in this way, after liquid enters the space between the stator outer diameter support 120 and the first sealing plate 150 and between the stator outer diameter support 120 and the second sealing plate 160 through the liquid inlet 191, the liquid enters the space between the stator inner diameter support 130 and the first sealing plate 150 and between the stator inner diameter support 130 and the second sealing plate 160 through the second groove 1112, and then enters the space between the stator outer diameter support 120 and the first sealing plate 150 and between the stator outer diameter support 120 and the second sealing plate 160 through the second groove 1112, and finally flows out of the stator structure 100 through the liquid outlet 192.

In a possible implementation manner, the liquid inlet 191 and the liquid outlet 192 may be arranged opposite to each other in a vertical direction, and the liquid inlet 191 may be arranged at a position higher than the liquid outlet 192. Through with inlet 191 and liquid outlet 192 relative setting on vertical direction, and the mounted position of inlet 191 is higher than the mounted position of liquid outlet 192, liquid passes through inlet 191 and gets into stator structure 100 inside back, can utilize the action of gravity to flow out from liquid outlet 192, can reduce the hydraulic pressure requirement to stator structure 100 inside like this, utilizes the action of gravity can be fine realization liquid in the inside abundant flow of stator structure 100. In addition, the liquid flows by gravity, so that the pressure on the first seal plate 150 and the second seal plate 160 can be reduced, and the overall sealing performance of the stator structure 100 can be further improved.

In addition, in the embodiment of the present application, the stator core 111, the stator outer diameter bracket 120, and the stator inner diameter bracket 130 may be integrally molded by integral casting.

Also, in one possible implementation, as shown in fig. 14, the stator core 111, the stator outer diameter bracket 120, the stator inner diameter bracket 130, the at least two fixing members 140, the plurality of stator outer diameter partition plates 170, and the plurality of stator inner diameter partition plates 180 may be integrally formed by integral casting. Like this, the mounting 140 need not to adopt the mode of fix with screw to be connected between stator outer diameter support 120 and the stator inner diameter support 130, similarly, stator outer diameter separates that baffle 170 also need not to adopt the mode of fix with screw to be connected between stator outer diameter support 120 and the stator inner diameter support 130, stator inner diameter separates that baffle 180 also need not to adopt the mode of fix with screw to be connected between stator outer diameter support 120 and the stator inner diameter support 130, promptly this application embodiment can cancel and set up the screw on stator outer diameter support 120 and stator inner diameter support 130, also need not to increase the screw, the assembly of stator structure 100 has been simplified to a certain extent.

Next, taking different scenarios as examples, a cooling method of the stator structure 100 provided in the embodiment of the present application, that is, a flow method of a liquid (i.e., cooling oil) in the stator structure 100 will be described in detail.

Scene one

As shown in fig. 18 and 19, the stator outer diameter support 120, the stator inner diameter support 130, and the stator core 111 divide the stator structure 100 into upper and lower layers from the middle in the axial direction thereof. In this scenario, the stator outer diameter support 120 is provided with a plurality of first through holes, and the first through holes communicate two sides of the stator outer diameter support 120. The stator inner diameter support 130 is provided with a plurality of second through holes, and the two sides of the stator inner diameter support 130 are communicated through the second through holes. At this time, the cooling oil can pass through between the upper and lower stages of the stator structure 100.

The stator outer diameter bracket 120 and the stator inner diameter bracket 130 are used as planes, and a stator outer diameter baffle plate 170 and a stator inner diameter baffle plate 180 are clamped between the outer shell 190 and the stator core 111 to plan an oil path. Then, the armature winding 112 is drawn down from the position of the notch of the second groove 1112 and is dip-painted to fill the gap, and the upper and lower end faces of the armature winding end portion 112B do not abut the stator outer diameter bracket 120, the stator inner diameter bracket 130, and the first and

second seal plates

150 and 160, but leave a certain gap for the passage of the cooling oil.

The flow of the cooling oil will be specifically described. As shown in fig. 18 and 19, the liquid inlet 191 is located at an upper stage of the stator structure 100, and the liquid outlet 192 is located at a lower stage of the stator structure 100. The cooling oil enters from the liquid inlet 191 and is divided into two paths by the first stator outer diameter baffle 1711, wherein one path of cooling oil enters the lower layer of the stator structure 100 from the first sub through hole 121, and the other path of cooling oil enters the lower layer of the stator structure 100 from the second sub through hole 122.

The first stator inner diameter baffle 1811 is also used to maintain the oil path in two paths, and the other part of the two paths does not flow out of the cooling oil in the first and second sub through

holes

121 and 122, and after flowing through the gap between the armature winding 112, the stator core 111 and the outer housing 190 in the upper part of the stator structure 100, the cooling oil flows into the fifth sub through hole 131 or the sixth sub through hole 132 after encountering the second stator outer diameter baffle 1712, the third stator outer diameter baffle 1713, the second stator inner diameter baffle 1812 and the third stator inner diameter baffle 1813, and enters the lower part of the stator structure 100.

The cooling oil entering the lower layer of the stator structure 100 from the first and second sub through holes 121 and 122 meets the fifth and sixth stator outer diameter barriers 1715 and 1716 after passing through the gap between the armature winding 112, the stator core 111, and the outer housing 190 of the lower layer portion of the stator structure 100, and then flows toward the first and second sub through holes 121 and 122, collects with the cooling oil flowing out from the first and second sub through holes 121 and 122, continues to flow into the gap of the other lower layer portion of the stator structure 100, and after meeting the seventh stator outer diameter barrier 1717, the eighth stator outer diameter barrier 1718, the fifth stator inner diameter barrier 1815, and the sixth stator inner diameter barrier 1816, flows into the third and fourth sub through holes 123 and 124, the cooling oil reenters the upper layer of the stator structure 100, and after passing through the other gap of the upper layer portion of the stator structure 100, meets the fourth stator outer diameter barrier 1714 and the fourth stator inner diameter barrier 1814, flows into the seventh and sixth stator outer diameter barrier 1814, and then flows into the gap of the seventh and the remaining portion of the stator structure 100, and flows out of the stator outer diameter barrier 1816, and then flows into the gap of the lower layer portion of the stator structure 100, and flows out of the remaining stator structure through hole 134.

In this scenario, a first sub through hole 121, a second sub through hole 122, a third sub through hole 123 and a fourth sub through hole 124 are formed in the stator outer diameter support 120, and a fifth sub through hole 131, a sixth sub through hole 132, a seventh sub through hole 133 and an eighth sub through hole 134 are formed in the stator inner diameter support 130, so that the cooling oil can pass through between the upper layer and the lower layer of the stator structure 100, and the stator outer diameter partition 170 and the stator inner diameter partition 180 are respectively clamped between the outer shell 190 and the stator core 111 of the upper layer and the lower layer of the stator structure 100 to plan an oil path.

Through the design, the oil path formed under the structure can have better coverage rate in the stator structure 100, and the space occupation ratio of difficult circulation can be effectively reduced. Moreover, the cooling oil can flow from the inlet 191 to the outlet 192 by its own weight, and the counter-gravity flow area is small, so that the first sealing plate 150 and the second sealing plate 160 are not greatly squeezed to form a bulge, which affects the performance of the axial-flux motor. The oil passages of the stator structure 100, which are S-shaped up and down as a whole, may also enhance the turbulence of the fluid to improve the cooling efficiency. In addition, when the axial flux motor is placed obliquely due to application, the cooling oil is divided into two paths by the stator outer diameter partition plate 170 and the stator inner diameter partition plate 180 within a certain inclination angle range, so that the influence of gravity inclination on the flow and the heat dissipation performance of the cooling oil can be reduced.

Scene two

As shown in fig. 20 and 21, the stator outer diameter support 120, the stator inner diameter support 130, and the stator core 111 divide the stator structure 100 into upper and lower stages from the middle in the axial direction thereof. In contrast to the above scenario, in the present scenario, the first through hole is not disposed on the stator outer diameter support 120, that is, the two sides of the stator outer diameter support 120 are not connected. The stator bore support 130 is also not provided with a second through hole, that is, both sides of the stator bore support 130 are not communicated. At this time, the structure 100 is completely divided into upper and lower independent layers in its axial direction in a closed state.

The stator outer diameter bracket 120 and the stator inner diameter bracket 130 are used as planes, and a stator outer diameter baffle plate 170 and a stator inner diameter baffle plate 180 are clamped between the outer shell 190 and the stator core 111 to plan an oil path. Then, the armature winding 112 is inserted from the position of the notch of the second groove 1112 and is dip-painted to fill the gap, and the upper and lower end faces of the armature winding end portion 112B do not abut the stator outer diameter bracket 120, the stator inner diameter bracket 130, and the first and

second seal plates

150 and 160, but leave a certain gap for the passage of the cooling oil.

The flow of the cooling oil will be specifically described. As shown in fig. 20 and 21, the first inlet port 1911 and the first outlet port 1921 are located at an upper layer of the stator structure 100, and the second inlet port 1912 and the second outlet port 1922 are located at a lower layer of the stator structure 100. Taking the upper layer of the stator structure 100 as an example, the cooling oil enters from the first inlet 1911 and is divided into two paths by the first stator outer diameter baffle 1711, and the first stator inner diameter baffle 1811 is used to maintain the oil path in two paths.

In addition, the upper layer of the stator structure 100 is divided into the first region 1001 and the second region 1002 as shown in fig. 20 and 21, and at this time, a part of the cooling oil directly flows from the gap located outside the stator core 111 of the first region 1001, through the second grooves 1112 of the stator core 111, into the gap located inside the stator core 111 of the first region 1001, and then directly flows into the gaps located outside and inside the stator core 111 of the second region 1002, and up to the first liquid outlet 1921. The other part of the cooling oil flows to the second outer stator diameter baffle 1712 and the third outer stator diameter baffle 1713 through the gap located outside the stator core 111 of the first region 1001, bends after being blocked, flows to the gap located inside the stator core 111 of the first region 1001, and then flows to the first liquid outlet 1921 through the gaps located outside and inside the stator core 111 of the second region 1002.

The lower oil path of the stator structure 100 is similar to the upper oil path of the stator structure 100, the cooling oil enters from the second inlet 1912, is divided into two paths by the fifth stator outer diameter baffle 1715, the fifth stator inner diameter baffle 1815 is used to maintain the oil path into two paths, a part of the cooling oil directly flows from the gap located at the outer side of the stator core 111 of the first region 1001 through the second groove 1112 of the stator core 111, flows into the gap located at the inner side of the stator core 111 of the first region 1001, then directly flows into the gaps located at the outer side and the inner side of the stator core 111 of the second region 1002 to the second outlet 1922, and the other part of the cooling oil flows through the gap located at the outer side of the stator core 111 of the first region 1001 to the sixth stator outer diameter baffle 1716 and the seventh stator outer diameter baffle 1717, bends after being stopped, flows into the gap located at the inner side of the stator core 111 of the first region 1001, and then flows into the second outlet 2 respectively.

In this scenario, the first through hole and the second through hole are not formed in the stator outer diameter support 120 and the stator inner diameter support 130, so that the stator structure 100 is completely divided into an upper layer and a lower layer which are independent. Further, a stator outer diameter baffle plate 170 and a stator inner diameter baffle plate 180 are inserted between the outer case 190 and the stator core 111 in the upper and lower layers of the stator structure 100, respectively, to define an oil path.

Through the design, in the oil circuit formed under the structure, the flowing space of the cooling oil of each layer is small, the flowing direction is simple, and the smoothness of the fluid space is good. The flowing time of the cooling oil is short, the heating time of the cooling oil by the heating parts is short, the quantity of the heating parts for heating the cooling oil at each part is small, the temperature difference of the cooling oil at the inlet and the outlet can be reduced, and the weakening of the heat radiation capability caused by the heating of the cooling oil is reduced. Also, the cooling oil may flow by its own weight from first inlet port 1911 and second inlet port 1912 to first outlet port 1921 and second outlet port 1922, respectively, with less counter-gravity flow area and without causing too much compression of first seal plate 150 and second seal plate 160 to form a bulge that affects the performance of the axial-flux machine. In addition, the cooling oil is divided into two paths by the stator outer diameter partition plate 170 and the stator inner diameter partition plate 180 to flow, so that the influence of gravity inclination on the flow and the heat dissipation performance of the cooling oil can be reduced.

On the basis of the above embodiments, embodiments of the present application further provide an axial-flux motor, which may include: at least one rotor structure (not shown) and at least one stator structure 100 as described above, wherein the stator structures 100 and the rotor structures are arranged alternately along an axial direction of the axial flux machine.

The axial flux machine according to the embodiment of the present application may include a stator structure 100, where at least two fixtures 140 are disposed in the stator structure 100 and spaced apart from each other along a circumferential direction of a stator core 111, and each fixture 140 is disposed between two adjacent sets of armature windings 112, and each fixture 140 passes through a stator outer diameter bracket 120, the stator core 111, and a stator inner diameter bracket 130 along a radial direction of the stator core 111 to fix the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 into a whole, and compared with a method in which an inner ring and an outer ring are installed in an interference manner between the stator outer diameter bracket 120 and the stator core 111 and between the stator inner diameter bracket 130 and the stator core 111 in the prior art, the present application embodiment may provide a plurality of fixtures 140 in the circumferential direction of the stator core 111, and pass through the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 along the radial direction of the stator core 111, and fix the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 into a whole, which can improve an overall strength of the stator structure 100, thereby improving overall reliability of the axial flux machine. Further, since the fixing strength of the fixing member 140 to the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 is high, the coaxiality of the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 can be further ensured, which is more advantageous for mass production of the stator structure 100.

That is, by providing the stator structure 100 in the axial flux motor, the reliability of the axial flux motor is high due to the high reliability of the stator structure 100 in the axial flux motor, so that the usability of the axial flux motor can be optimized.

In addition, it is understood that in the present embodiment, the axial-flux motor may be a dual-rotor single-stator axial-flux motor, i.e., two rotor structures are respectively located on both sides of the one stator structure 100.

Embodiments of the present application further provide a power assembly, which may include at least the axial-flux motor described above.

The power assembly provided by the embodiment of the application comprises at least an axial flux motor, wherein the axial flux motor at least comprises a stator structure, at least two fixing pieces are arranged in the stator structure and distributed at intervals along the circumferential direction of a stator core, each fixing piece is arranged between two adjacent groups of armature windings, each fixing piece penetrates through a stator outer diameter support, a stator core and a stator inner diameter support along the radial direction of the stator core, and the stator outer diameter support, the stator core and the stator inner diameter support are fixed into a whole. In addition, the fixing strength of the fixing member to the stator outer diameter support, the stator core and the stator inner diameter support is high, so that the coaxiality of the stator outer diameter support, the stator core and the stator inner diameter support can be further ensured, and the mass production of the stator structure can be facilitated.

In addition, the embodiment of this application still provides a vehicle, and this vehicle can include at least: the axial flux motor can be mounted on the vehicle body.

It can be understood that the axial flux motor is used for providing power for a vehicle, and the axial flux motor in the application has the advantages of compact structure, high structural strength, high torque density and high power density, can save the size of the axial flux motor due to the compact structure, and can save the inner space of the vehicle when being applied to the vehicle. The vehicle may include an automobile or the like, in other embodiments, the vehicle may include an electric vehicle or a special work vehicle, the electric vehicle may include a two-wheel, three-wheel or four-wheel electric vehicle, and the special work vehicle may include various vehicles with specific functions, such as an engineering emergency car, a watering cart, a sewage suction truck, a cement mixer truck, a lift truck or a medical truck, and the like.

The vehicle provided by the embodiment of the present application may include at least an axial flux motor, the axial flux motor may include at least a stator structure 100, at least two fixtures 140 spaced apart from each other along a circumferential direction of a stator core 111 are disposed in the stator structure 100, each fixture 140 is disposed between two adjacent sets of armature windings 112, and each fixture 140 passes through a stator outer diameter bracket 120, the stator core 111, and a stator inner diameter bracket 130 along a radial direction of the stator core 111 to function to fix the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 into a whole, compared to a method in which an inner-outer-ring interference mounting is adopted between the stator outer diameter bracket 120 and the stator core 111 and between the stator inner diameter bracket 130 and the stator core 111 in the prior art, the present application embodiment provides a plurality of fixtures 140 in the circumferential direction of the stator core 111, and the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 are fixed into a whole by the plurality of fixtures 140 passing through the stator outer diameter bracket 120, the stator core 111 along the radial direction, the stator core 111, and the stator core bracket 130, thereby improving the overall strength of the stator structure 100 and improving the overall reliability of the axial flux motor. Further, since the fixing strength of the fixing member 140 to the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 is high, the coaxiality of the stator outer diameter bracket 120, the stator core 111, and the stator inner diameter bracket 130 can be further ensured, which is more advantageous for mass production of the stator structure 100.

That is, by providing the axial flux motor in the vehicle, the reliability of the stator structure 100 in the axial flux motor is high, so that the reliability of the axial flux motor is high, the overall reliability of the vehicle is high, and the usability and safety performance of the vehicle can be optimized.

In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, an indirect connection through an intermediate medium, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

Reference throughout this specification to apparatus or components, in embodiments or applications, means or components must be constructed and operated in a particular orientation and therefore should not be construed as limiting the present embodiments. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the embodiments of the application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "may include" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and are not limited thereto. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: it is also possible to modify the solutions described in the previous embodiments or to substitute some or all of them with equivalents. And the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A stator structure, characterized by comprising at least:

the stator assembly, the stator outer diameter bracket and the stator inner diameter bracket are coaxially arranged;

the stator outer diameter support is positioned on the outer side of the stator assembly, and the stator inner diameter support is positioned on the inner side of the stator assembly along the radial direction of the stator assembly;

the stator assembly comprises a stator core and at least two groups of armature windings; the at least two groups of armature windings are distributed at intervals along the circumferential direction of the stator core and are respectively wound on the stator core;

further comprising: at least two fixing pieces; the at least two fixing pieces are distributed at intervals along the circumferential direction of the stator core, each fixing piece is located between two adjacent groups of armature windings, and each fixing piece penetrates through the stator outer diameter support, the stator core and the stator inner diameter support along the radial direction of the stator core so as to fix the stator outer diameter support, the stator core and the stator inner diameter support.

2. The stator structure according to claim 1, wherein at least two first grooves are formed in the outer circumferential wall of the stator core, and the at least two first grooves are distributed at intervals along the circumferential direction of the stator core;

each first groove is used for inserting one fixing piece.

3. The stator structure according to claim 2, wherein a plurality of second grooves are formed in the outer peripheral wall of the stator core, and the plurality of second grooves are spaced apart from each other along the circumferential direction of the stator core; the second grooves and the first grooves are arranged in a staggered mode;

the second groove is at least used for accommodating the armature winding.

4. The stator structure of claim 3, wherein the second groove is a stepped groove; the ladder groove includes: a first portion and a second portion connected to the first portion;

the first portion is close to the outer surface of the stator core, the second portion is far away from the outer surface of the stator core, and the aperture of the first portion is larger than that of the second portion;

wherein the first portion is for receiving the armature winding and the second portion is for receiving a liquid.

5. A stator structure according to claim 3, wherein each set of the armature windings comprises: a first sub-winding and a second sub-winding;

in the axial direction of the stator core, a gap is formed between the first sub-winding and the second sub-winding, and the gap is used for containing liquid.

6. The stator structure according to any one of claims 3 to 5, further comprising: a first sealing plate and a second sealing plate;

the first sealing plate and the second sealing plate are respectively positioned on two sides of the stator assembly along the axial direction of the stator assembly and are coaxially arranged with the stator assembly;

the first sealing plate is abutted with one side of the stator outer diameter support and one side of the stator inner diameter support, and the second sealing plate is abutted with the other side of the stator outer diameter support and the other side of the stator inner diameter support.

7. The stator structure of claim 6, further comprising: a plurality of stator outer diameter baffle plates; the plurality of stator outer diameter baffle plates are distributed at intervals along the circumferential direction of the stator outer diameter support, and each stator outer diameter baffle plate is positioned between two adjacent groups of armature windings;

the plurality of stator outer diameter baffles are positioned in a space between the stator outer diameter bracket and the first sealing plate;

or the plurality of stator outer diameter baffle plates are positioned in a space between the stator outer diameter bracket and the second sealing plate;

alternatively, some of the plurality of stator outer diameter spacers are located in a space between the stator outer diameter bracket and the first seal plate, and the remaining of the plurality of stator outer diameter spacers are located in a space between the stator outer diameter bracket and the second seal plate.

8. The stator structure according to claim 7, wherein each of the stator outer diameter spacers has an opening therein, and adjacent two sets of the armature windings communicate with each other through the openings.

9. The stator structure according to claim 7 or 8, characterized in that the number of the stator outer diameter baffles is eight;

the four stator outer diameter baffle plates are distributed on one side surface of the stator outer diameter support at intervals along the circumferential direction of the stator outer diameter support, and two adjacent stator outer diameter baffle plates in the four stator outer diameter baffle plates are spaced for 90 degrees;

the other four stator outer diameter baffle plates are distributed on the surface of the other side of the stator outer diameter support at intervals along the circumferential direction of the stator outer diameter support, and two adjacent stator outer diameter baffle plates in the four stator outer diameter baffle plates are spaced at 90 degrees.

10. The stator structure according to claim 9, wherein a projection of the four stator outer diameter spacers on one side surface of the stator outer diameter support in the axial direction of the stator outer diameter support is at least partially misaligned with a projection of the four stator outer diameter spacers on the other side surface of the stator outer diameter support in the axial direction of the stator outer diameter support.

11. The stator structure according to claim 10, wherein a projection of the four stator outer diameter bulkheads on one side surface of the stator outer diameter support in the axial direction of the stator outer diameter support and a projection of the four stator outer diameter bulkheads on the other side surface of the stator outer diameter support in the axial direction of the stator outer diameter support are different by 45 ° in the circumferential direction of the stator outer diameter support.

12. The stator structure according to any one of claims 7 to 11, further comprising: a plurality of stator inner diameter baffle plates; the stator inner diameter baffle plates are distributed at intervals along the circumferential direction of the stator inner diameter support;

the stator inner diameter baffles are positioned in a space between the stator inner diameter bracket and the first sealing plate;

or the plurality of stator inner diameter baffles are positioned in a space between the stator inner diameter bracket and the second sealing plate;

alternatively, a portion of the plurality of stator inner diameter baffles may be located in a space between the stator inner diameter support and the first seal plate, and a remaining portion of the plurality of stator inner diameter baffles may be located in a space between the stator inner diameter support and the second seal plate.

13. The stator structure according to claim 12, wherein the number of the stator inner diameter baffles is eight;

the four stator inner diameter baffle plates are distributed on one side surface of the stator inner diameter support at intervals along the circumferential direction of the stator inner diameter support, and two adjacent stator inner diameter baffle plates in the four stator inner diameter baffle plates are spaced at an angle of 90 degrees;

the other four stator inner diameter baffle plates are distributed on the surface of the other side of the stator inner diameter support at intervals along the circumferential direction of the stator inner diameter support, and two adjacent stator inner diameter baffle plates in the four stator inner diameter baffle plates are spaced at 90 degrees.

14. The stator structure of claim 13, wherein a projection of the four stator inner diameter baffles on one side surface of the stator inner diameter support along an axial direction of the stator inner diameter support is at least partially misaligned with a projection of the four stator inner diameter baffles on the other side surface of the stator inner diameter support along an axial direction of the stator inner diameter support.

15. The stator structure according to claim 14, wherein a projection of the four stator inner diameter bulkheads on one side surface of the stator inner diameter support in the axial direction of the stator inner diameter support is different from a projection of the four stator inner diameter bulkheads on the other side surface of the stator inner diameter support in the axial direction of the stator inner diameter support by 45 ° in the circumferential direction of the stator inner diameter support.

16. The stator structure according to any one of claims 3 to 15, wherein the stator outer diameter support is provided with a plurality of first through holes, and the first through holes are used for communicating two sides of the stator outer diameter support.

17. The stator structure according to any one of claims 3 to 16, wherein the stator bore support is provided with a plurality of second through holes, and the second through holes are used for communicating two sides of the stator bore support.

18. The stator structure according to any one of claims 3 to 17, further comprising: an outer housing; the shell body cover is established on the periphery wall of stator external diameter support, just the shell body with stator external diameter support is fixed mutually.

19. The stator structure according to claim 18, wherein the outer shell defines at least one inlet and at least one outlet;

and the liquid inlet and the liquid outlet are communicated with the second groove.

20. The stator structure according to claim 19, wherein the liquid inlet and the liquid outlet are arranged opposite to each other in a vertical direction;

and the liquid inlet is arranged at a position higher than the liquid outlet.

21. A stator structure according to any one of claims 1-20, wherein said stator core, said stator outer diameter bracket and said stator inner diameter bracket are integrally cast.

22. The stator structure according to any one of claims 12 to 15, wherein the stator core, the stator outer diameter bracket, the stator inner diameter bracket, the at least two fixing members, the plurality of stator outer diameter barriers, and the plurality of stator inner diameter barriers are integrally cast.

23. An axial flux motor, comprising: at least one rotor structure and at least one stator structure as claimed in any one of the preceding claims 1 to 22;

the stator structure and the rotor structure are alternately arranged along an axial direction of the axial flux motor.

24. A power pack, comprising an axial-flux electric machine according to claim 23.

25. A vehicle, characterized by comprising: front wheels, rear wheels, vehicle body and the axial flux electric machine of claim 23 above;

the vehicle body is connected between the front wheel and the rear wheel, and the axial-flux motor is mounted on the vehicle body.