Axial-flux electric motor, electric drive device, electric drive system and electric apparatus

Abstract

Provided in the present application are an axial-flux electric motor (10), an electric drive device (100), an electric drive system and an electric apparatus. The axial-flux electric motor (10) comprises a housing (11), a rotor (12) and a stator (13), wherein the rotor (12) comprises a first housing body (121) and a rotor main body (122), the first housing body (121) having a first accommodating cavity (1211) configured to accommodate the rotor main body (122); and the stator (13) comprises a second housing body (131), a separator (132) and a stator main body (133), the second housing body (131) having a second accommodating cavity (1314) configured to accommodate the stator main body (133), the separator (132) being arranged between the first housing body (121) and the second housing body (131), the second housing body (131) and the separator (132) being fixedly connected to the stator main body (133), and the stator main body (133) being fixedly connected to the housing (11).

Description

Axial flux motor, electric drive device, electric drive system and electric equipment

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202310761213.5 filed on June 26, 2023, entitled "Axial flux motor, electric drive device, electric drive system and electric equipment", which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of electric drive technology, and in particular to an axial flux motor, an electric drive device, an electric drive system and an electric device. Background Art

[0004] An axial flux motor is a power device used to convert electrical energy into mechanical energy. An axial flux motor typically includes a stator and a rotor. To separate the rotor body and other components of the axial flux motor from the stator body, a housing and a separator are typically provided on the stator. The separator is disposed between the stator body and the rotor body, and the housing is used to accommodate the stator body. However, during operation of the axial flux motor, the separator is prone to deformation toward the rotor, causing interference between the rotor body and the separator, while the housing is prone to shaking, causing interference between the housing and other components of the axial flux motor, which is not conducive to improving the performance of the axial flux motor.

[0005] Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide an axial flux motor, an electric drive device, an electric drive system and an electric equipment to solve the technical problems in the related art that the stator separator is prone to interfere with the rotor body and the stator shell is prone to interfere with other components of the axial flux motor.

[0007] To achieve the above objectives, the technical solution adopted in the embodiment of the present application is to provide an axial flux motor, comprising:

[0008] shell;

[0009] The rotor is accommodated in the housing, and includes a first shell and a rotor body, wherein the first shell has a first cavity for accommodating the rotor body;

[0010] The stator is accommodated in the outer shell, and the stator includes a second shell, a partition and a stator body. The second shell has a second cavity for accommodating the stator body. The partition is arranged between the first shell and the second shell to separate the first cavity and the second cavity. The second shell and the partition are fixedly connected to the stator body, and the stator body is fixedly connected to the outer shell.

[0011] The axial flux motor provided by the embodiment of the present application has at least the following beneficial effects: the axial flux motor provided by the embodiment of the present application fixes the second shell and the partition to the stator body, and fixes the stator body to the outer shell, so that the position of the part where the partition is fixedly connected to the stator body is relatively fixed with the position of the rotor body, effectively improving the situation where the partition is deformed toward the rotor body, thereby effectively reducing the risk of interference between the partition and the rotor body, and at the same time enabling the stator body, the second shell and the outer shell to be relatively fixed, effectively improving the shaking of the second shell, thereby effectively reducing the risk of interference between the second shell and other components of the axial flux motor, which is beneficial to improving the performance of the axial flux motor.

[0012] In some embodiments of the present application, the stator body includes multiple cores and multiple slot wedges, winding slots are formed between two adjacent cores, and the slot wedges are inserted into the winding slots and fixedly connected to the separators.

[0013] By adopting the above technical solution, a slot wedge of corresponding material can be selected according to the material of the separator, so that the material of the slot wedge is the same as that of the separator, or the material type of the slot wedge is the same as that of the separator, thereby effectively improving the connection strength between the slot wedge and the separator.

[0014] In some embodiments of the present application, the slot wedge includes an inserting portion and a first connecting portion, the inserting portion is inserted into the winding slot, the first connecting portion is arranged on the side of the inserting portion facing the partition, and the first connecting portion extends out of the winding slot and is fixedly connected to the partition.

[0015] By adopting the above technical solution, the connection stress between the slot wedge and the separator is effectively reduced, thereby effectively improving the connection stability between the slot wedge and the separator.

[0016] In some embodiments of the present application, the partition is provided with a first connection hole, and the first connection part is fixedly connected in the first connection hole; or, the partition is provided with a first connection groove, and the first connection part is fixedly connected in the first connection groove.

[0017] By adopting the above technical solution, the connection area between the slot wedge and the separator is effectively increased, thereby further improving the connection strength between the slot wedge and the separator.

[0018] In some embodiments of the present application, a second connecting portion is provided on a side of the separator facing the stator body, and the second connecting portion extends into the winding slot and is fixedly connected to the slot wedge.

[0019] By adopting the above technical solution, the connection stress between the slot wedge and the separator is effectively reduced, thereby effectively improving the connection stability between the slot wedge and the separator.

[0020] In some embodiments of the present application, the slot wedge includes an inserting portion, which is inserted into the winding slot; the inserting portion is provided with a second connecting hole, and the second connecting portion is fixedly connected to the second connecting hole; or, the inserting portion is provided with a second connecting groove, and the second connecting portion is fixedly connected to the second connecting groove.

[0021] By adopting the above technical solution, the connection area between the slot wedge and the separator is effectively increased, thereby further improving the connection strength between the slot wedge and the separator.

[0022] In some embodiments of the present application, the slot wedge includes an insert portion, which is inserted into the winding slot. The insert portion has a first connecting surface on the side facing the partition, and the partition has a second connecting surface on the side facing the stator body. The first connecting surface is fixedly connected to the second connecting surface.

[0023] By adopting the above technical solution, the connection area between the slot wedge and the separator is effectively increased, thereby further improving the connection strength between the slot wedge and the separator.

[0024] In some embodiments of the present application, the slot wedge and the separator are heat-riveted, welded, or bonded.

[0025] By adopting the above technical solution, the connection between the slot wedge and the separator is effectively achieved.

[0026] In some embodiments of the present application, the second housing has a first outer annular wall arranged around the outer circumference of the stator body, and the end side of the first outer annular wall facing the partition is fixedly connected to the partition.

[0027] By adopting the above technical solution, the position of the part where the separator is fixedly connected to the first outer ring wall is relatively fixed with the position of the rotor body, which further improves the situation where the separator deforms toward the rotor body, thereby further reducing the risk of interference between the separator and the rotor body.

[0028] In some embodiments of the present application, a third connecting portion is provided on the end side of the first outer ring wall facing the partition, and the third connecting portion is fixedly connected to the partition.

[0029] By adopting the above technical solution, it is convenient to fix the first outer ring wall and the partition.

[0030] In some embodiments of the present application, the partition is provided with a third connection hole, and the third connection portion is fixedly connected in the third connection hole; or, the partition is provided with a third connection groove, and the third connection portion is fixedly connected in the third connection groove.

[0031] By adopting the above technical solution, the connection area between the first outer annular wall and the partition is effectively increased, thereby further improving the connection strength between the first outer annular wall and the partition.

[0032] In some embodiments of the present application, a fourth connection portion is provided on a side of the separator facing the stator body, and the fourth connection portion is fixedly connected to the end side of the first outer ring wall facing the separator.

[0033] By adopting the above technical solution, it is convenient to fix the first outer ring wall and the partition.

[0034] In some embodiments of the present application, a fourth connecting hole is provided on the end side of the first outer annular wall facing the partition, and the fourth connecting portion is fixedly connected in the fourth connecting hole; or, a fourth connecting groove is provided on the end side of the first outer annular wall facing the partition, and the fourth connecting portion is fixedly connected in the fourth connecting groove.

[0035] By adopting the above technical solution, the connection area between the first outer annular wall and the partition is effectively increased, thereby further improving the connection strength between the first outer annular wall and the partition.

[0036] In some embodiments of the present application, the end side of the first outer ring wall facing the separator has a third connecting surface, and the side of the separator facing the stator body has a fourth connecting surface, and the third connecting surface is fixedly connected to the fourth connecting surface.

[0037] By adopting the above technical solution, the connection area between the first outer annular wall and the partition is effectively increased, thereby further improving the connection strength between the first outer annular wall and the partition.

[0038] In some embodiments of the present application, an axial cavity is opened in the middle of the stator body, and the rotor also includes a rotating shaft fixedly connected to the rotor body, and the rotating shaft is passed through the axial cavity. The second shell also has a first inner ring wall arranged in the axial cavity, and the first inner ring wall is arranged around the rotating shaft. The end side of the first inner ring wall facing the partition is fixedly connected to the partition.

[0039] By adopting the above technical solution, the position of the part where the separator is fixedly connected to the first inner ring wall is relatively fixed with the position of the rotor body, which further improves the situation where the separator deforms toward the rotor body, thereby further reducing the risk of interference between the separator and the rotor body.

[0040] In some embodiments of the present application, a fifth connecting portion is provided on the end side of the first inner annular wall facing the partition, and the fifth connecting portion is fixedly connected to the partition.

[0041] By adopting the above technical solution, it is convenient to fix the first inner ring wall and the partition.

[0042] In some embodiments of the present application, the partition is provided with a fifth connection hole, and the fifth connection portion is fixedly connected in the fifth connection hole; or, the partition is provided with a fifth connection groove, and the fifth connection portion is fixedly connected in the fifth connection groove.

[0043] By adopting the above technical solution, the connection area between the first inner annular wall and the partition is effectively increased, thereby further improving the connection strength between the first inner annular wall and the partition.

[0044] In some embodiments of the present application, a sixth connection portion is provided on a side of the separator facing the stator body, and the sixth connection portion is fixedly connected to the end side of the first inner ring wall facing the separator.

[0045] By adopting the above technical solution, it is convenient to fix the first inner ring wall and the partition.

[0046] In some embodiments of the present application, the first inner annular wall is provided with a sixth connecting hole, and the sixth connecting portion is fixedly connected in the sixth connecting hole; or, the end side of the first inner annular wall facing the partition is provided with a sixth connecting groove, and the sixth connecting portion is fixedly connected in the sixth connecting groove.

[0047] By adopting the above technical solution, the connection area between the first inner annular wall and the partition is effectively increased, thereby further improving the connection strength between the first inner annular wall and the partition.

[0048] In some embodiments of the present application, the end side of the first inner ring wall facing the separator has a fifth connecting surface, and the side of the separator facing the stator body has a sixth connecting surface, and the fifth connecting surface is fixedly connected to the sixth connecting surface.

[0049] By adopting the above technical solution, the connection area between the first inner annular wall and the partition is effectively increased, thereby further improving the connection strength between the first inner annular wall and the partition.

[0050] In some embodiments of the present application, the second housing includes a frame, and the frame is fixedly connected to the stator body.

[0051] By adopting the above technical solution, the structural strength of the second shell is effectively improved, thereby effectively reducing the risk of deformation of the second shell, and further reducing the risk of interference between the second shell and other components of the axial flux motor.

[0052] In some embodiments of the present application, the skeleton is a metal part, and the skeleton is arranged on the non-air gap side of the stator body.

[0053] By adopting the above technical solution, the structural strength of the second housing is further improved without increasing the magnetic resistance between the stator body and the rotor body, thereby further reducing the risk of deformation of the second housing.

[0054] In some embodiments of the present application, the skeleton includes a first frame body, which is disposed on a side of the stator body facing away from the rotor body and is fixedly connected to the stator body.

[0055] By adopting the above technical solution, it is convenient to fix the skeleton and the stator body.

[0056] In some embodiments of the present application, the first frame includes a first support portion and a seventh connection portion. The first support portion is arranged around the central axis of the axial flux motor, and the seventh connection portion is protruded from the periphery of the first support portion and is fixedly connected to the side of the stator body facing away from the rotor body.

[0057] By adopting the above technical solution, it is convenient to fix the skeleton and the stator body.

[0058] In some embodiments of the present application, the seventh connecting portion is an annular structure and is arranged around the central axis of the axial flux motor.

[0059] By adopting the above technical solution, the connection portion between the seventh connection part and the stator body can be set to a closed-loop structure. In this way, not only the connection strength between the seventh connection part and the stator body is effectively improved, thereby further improving the shaking of the second shell, but also an annular sealing boundary can be formed between the seventh connection part and the stator body. Sealing can be achieved without the need to provide an additional sealing structure between the side of the stator body facing away from the rotor body and the second shell, thereby effectively simplifying the structure of the stator.

[0060] In some embodiments of the present application, the seventh connection portion includes a plurality of first connection members arranged at intervals along the circumference of the first support portion, and the first connection members are protruded from the periphery of the first support portion and fixedly connected to the side of the stator body facing away from the rotor body.

[0061] By adopting the above technical solution, the material usage of the skeleton is effectively reduced while ensuring sufficient connection strength between the seventh connecting portion and the stator body, thereby effectively reducing the production cost of the stator.

[0062] In some embodiments of the present application, the skeleton further includes a second frame, and the second frame is arranged around the outer circumference of the stator body.

[0063] By adopting the above technical solution, the structural strength of the second shell is further improved, thereby further reducing the risk of deformation of the second shell.

[0064] In some embodiments of the present application, the second frame is fixedly connected to the first support portion.

[0065] By adopting the above technical solution, the overall structural strength of the skeleton is effectively improved, thereby further improving the structural strength of the second shell and further reducing the risk of deformation of the second shell.

[0066] In some embodiments of the present application, the second shell further includes a first insulator, and the first insulator covers the second frame.

[0067] By adopting the above technical solution, the second frame can be insulated and separated from the winding of the stator, thereby effectively improving the insulation performance of the stator.

[0068] In some embodiments of the present application, the first frame also includes a second support portion and an eighth connecting portion. The second support portion is arranged in the inner annular space of the first support portion and is arranged around the central axis of the axial flux motor. The eighth connecting portion is protruded from the periphery of the second support portion and is fixedly connected to the side of the stator body facing away from the rotor body.

[0069] By adopting the above technical solution, not only the structural strength of the second shell is further improved, thereby further reducing the risk of deformation of the second shell, but also the connection strength between the skeleton and the stator body is further improved, thereby further improving the shaking of the second shell.

[0070] In some embodiments of the present application, the eighth connecting portion is an annular structure and is arranged around the central axis of the axial flux motor.

[0071] By adopting the above technical solution, the connection portion between the eighth connection part and the stator body can be set to a closed-loop structure. In this way, not only the connection strength between the eighth connection part and the stator body is effectively improved, thereby further improving the shaking of the second shell, but also an annular sealing boundary can be formed between the eighth connection part and the stator body. Sealing can be achieved without the need to provide an additional sealing structure between the side of the stator body facing away from the rotor body and the second shell, thereby effectively simplifying the structure of the stator.

[0072] In some embodiments of the present application, the eighth connection portion includes a plurality of second connection members arranged at intervals along the circumference of the second support portion, and the second connection members are protruded from the periphery of the second support portion and fixedly connected to the side of the stator body facing away from the rotor body.

[0073] By adopting the above technical solution, while ensuring sufficient connection strength between the eighth connecting portion and the stator body, the material usage of the skeleton is effectively reduced, thereby effectively reducing the production cost of the stator.

[0074] In some embodiments of the present application, an axial cavity is opened in the middle of the stator body, the rotor also includes a rotating shaft fixedly connected to the rotor body, the rotating shaft is passed through the axial cavity, and the skeleton also includes a third frame arranged in the axial cavity, and the third frame is arranged around the rotating shaft.

[0075] By adopting the above technical solution, the structural strength of the second shell is further improved, thereby further reducing the risk of deformation of the second shell.

[0076] In some embodiments of the present application, the third frame is fixedly connected to the second support portion.

[0077] By adopting the above technical solution, the overall structural strength of the skeleton is effectively improved, and the structural strength of the second shell is further improved, thereby further reducing the risk of deformation of the second shell.

[0078] In some embodiments of the present application, the second shell further includes a second insulator, and the second insulator covers the third frame.

[0079] By adopting the above technical solution, the third frame can be insulated and separated from the stator winding, thereby effectively improving the insulation performance of the stator.

[0080] In some embodiments of the present application, the second housing is sleeved on the stator body and is interference-connected with the stator body.

[0081] By adopting the above technical solution, it is convenient to fix the stator body and the second housing.

[0082] In some embodiments of the present application, a gap is provided on the wall of the second shell, and the stator body is fixedly connected to the shell through the gap.

[0083] By adopting the above technical solution, it is convenient to fix the stator body and the shell together.

[0084] In some embodiments of the present application, the stator body is sealedly connected to the second shell to seal and separate the gap from the second cavity, the second shell is sealedly connected to the partition, the second cavity contains a cooling medium, and at least a portion of the stator body is immersed in the cooling medium.

[0085] By adopting the above technical solution, the second cavity is effectively separated from the first cavity, which effectively improves the situation where the cooling medium in the second cavity directly enters the first cavity, thereby reducing the risk of the rotor body being immersed in the cooling medium and effectively reducing the loss of the axial flux motor.

[0086] In some embodiments of the present application, the second shell has a first cooling interface connected to the liquid inlet pipeline and a second cooling interface connected to the liquid outlet pipeline. The first cooling interface and the second cooling interface are connected to the second cavity, and the height of the first cooling interface is less than the height of the second cooling interface.

[0087] By adopting the above technical solution, the cooling medium flows into the second cavity from the lower part of the second shell and flows out of the second cavity from the higher part of the second shell. In this way, the gas in the second cavity is effectively discharged to the outside, which effectively improves the air entrainment phenomenon of the cooling medium, thereby effectively improving the cooling efficiency of the axial flux motor.

[0088] In some embodiments of the present application, the first cooling interface is opened at the bottom of the second shell, and the second cooling interface is opened at the top of the second shell.

[0089] By adopting the above technical solution, the air entrainment phenomenon of the cooling medium is further improved, thereby further improving the cooling efficiency of the axial flux motor.

[0090] In some embodiments of the present application, the second shell is sealed and connected to the partition, and the axial flux motor also includes a sealing assembly, which is arranged between the outer shell and the second shell, so that the outer shell, the second shell, and the sealing assembly enclose a third cavity, and the third cavity is connected to the second cavity through a gap to form a cooling cavity, and the cooling cavity contains a cooling medium, and at least a portion of the stator body is immersed in the cooling medium.

[0091] By adopting the above technical solution, the cooling chamber is effectively separated from the first cavity, which effectively improves the situation where the cooling medium in the cooling chamber directly enters the first cavity, thereby reducing the risk of the rotor body being immersed in the cooling medium and effectively reducing the loss of the axial flux motor.

[0092] In some embodiments of the present application, the second shell has a first inner ring wall and a first outer ring wall arranged around the first inner ring wall, the stator body is arranged between the first inner ring wall and the first outer ring wall, the outer shell has a second outer ring wall arranged around the first outer ring wall and a second inner ring wall arranged in the inner ring space of the first inner ring wall, the sealing assembly includes a first seal and a second seal, the first seal is arranged between the first outer ring wall and the second outer ring wall, and the second seal is arranged between the first inner ring wall and the second inner ring wall.

[0093] By adopting the above technical solution, the cooling chamber is effectively separated from the first cavity, which effectively improves the situation where the cooling medium in the cooling chamber directly enters the first cavity, thereby reducing the risk of the rotor body being immersed in the cooling medium and effectively reducing the loss of the axial flux motor.

[0094] In some embodiments of the present application, the shell has a third cooling interface connected to the liquid inlet pipeline and a fourth cooling interface connected to the liquid outlet pipeline. The third cooling interface and the fourth cooling interface are connected to the cooling cavity, and the height of the third cooling interface is less than the height of the fourth cooling interface.

[0095] By adopting the above technical solution, the cooling medium flows into the cooling cavity from the lower part of the shell and flows out of the cooling cavity from the higher part of the shell. In this way, the gas in the cooling cavity is effectively discharged to the outside, which effectively improves the air entrainment phenomenon of the cooling medium, thereby effectively improving the cooling efficiency of the axial flux motor.

[0096] In some embodiments of the present application, the third cooling interface is opened at the bottom of the shell, and the fourth cooling interface is opened at the top of the shell.

[0097] By adopting the above technical solution, the air entrainment phenomenon of the cooling medium is further improved, thereby further improving the cooling efficiency of the axial flux motor.

[0098] In some embodiments of the present application, a through hole is formed in the cavity wall of the first cavity.

[0099] By adopting the above technical solution, the first cavity is connected to the external space of the first shell. During the high-speed rotation of the rotor body, the air pressure in the first cavity and the air pressure in the external space of the first shell can be in a balanced state, thereby effectively improving the performance of the rotor.

[0100] In some embodiments of the present application, there are multiple through holes, and the multiple through holes are arranged along the circumference of the rotor body.

[0101] By adopting the above technical solution, the air pressure in the first cavity and the air pressure in the external space of the first shell are more effectively maintained in a balanced state, thereby further improving the performance of the rotor.

[0102] In some embodiments of the present application, there are two stators, and the rotor is disposed between the two stators.

[0103] By adopting the above technical solution, the performance of the dual-stator single-rotor motor is effectively improved.

[0104] An embodiment of the present application further provides an electric drive device, comprising the axial flux motor described in any one of the above embodiments.

[0105] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: the electric drive device provided by the embodiment of the present application adopts the above-mentioned axial flux motor, thereby effectively improving the performance of the electric drive device.

[0106] An embodiment of the present application further provides an electric drive system, comprising a battery and the above-mentioned electric drive device, wherein the battery is electrically connected to the electric drive device.

[0107] The electric drive system provided by the embodiment of the present application has at least the following beneficial effects: the electric drive system provided by the embodiment of the present application adopts the above-mentioned electric drive device, thereby effectively improving the performance of the electric drive system.

[0108] An embodiment of the present application also provides an electric device, including the above-mentioned electric drive system.

[0109] The electric device provided by the embodiment of the present application has at least the following beneficial effects: the electric device provided by the embodiment of the present application adopts the above-mentioned electric drive system, thereby effectively improving the performance of the electric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0111] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0112] FIG2 is a schematic diagram of an exploded structure of a battery provided in an embodiment of the present application;

[0113] FIG3 is a schematic structural diagram of an electric drive device provided in an embodiment of the present application;

[0114] FIG4 is a schematic diagram of the front structure of the electric drive device shown in FIG3 ;

[0115] FIG5 is a first schematic cross-sectional view of the axial flux motor in the electric drive device shown in FIG4 along line AA;

[0116] FIG6 is a second schematic cross-sectional view of the axial flux motor in the electric drive device shown in FIG4 along line AA;

[0117] FIG7 is a schematic structural diagram of a stator body provided in an embodiment of the present application;

[0118] FIG8 is a schematic structural diagram of the slot wedge in the stator body shown in FIG7 ;

[0119] FIG9 is a schematic diagram of a connection structure between a stator body and a separator according to an embodiment of the present application;

[0120] FIG10 is a second schematic diagram of the connection structure between the stator body and the separator provided in an embodiment of the present application;

[0121] FIG11 is a third schematic diagram of the connection structure between the stator body and the separator provided in an embodiment of the present application;

[0122] FIG12 is a fourth schematic diagram of the connection structure between the stator body and the separator provided in an embodiment of the present application;

[0123] FIG13 is a fifth schematic diagram of the connection structure between the stator body and the separator provided in an embodiment of the present application;

[0124] FIG14 is a schematic diagram of the connection structure between the second housing and the partition provided in an embodiment of the present application;

[0125] FIG15 is a second schematic diagram of the connection structure between the second housing and the partition provided in an embodiment of the present application;

[0126] FIG16 is a third schematic diagram of the connection structure between the second housing and the partition provided in an embodiment of the present application;

[0127] FIG17 is a fourth schematic diagram of the connection structure between the second housing and the partition provided in an embodiment of the present application;

[0128] FIG18 is a fifth schematic diagram of the connection structure between the second housing and the partition provided in an embodiment of the present application;

[0129] FIG19 is a schematic diagram of the main structure of the stator provided in an embodiment of the present application;

[0130] FIG20 is a second schematic diagram of the main structure of the stator provided in an embodiment of the present application.

[0131] In the figures, reference numerals are as follows: 1000, vehicle; 100, electric drive device; 10, axial flux motor; 11, housing; 111, second outer ring wall; 112, second inner ring wall; 113, third cooling interface; 114, fourth cooling interface; 12, rotor; 121, first housing; 1211, first cavity; 1212, through hole; 122, rotor body; 123, rotating shaft; 13, stator; 131, second housing; 1311, frame; 13111, first support portion; 13112, seventh connecting portion; 13113, second support portion; 13114, eighth connecting portion; 13115, second frame; 13116, third frame; 13117, gap; 1312, first insulator; 1313, second insulator; 1314, second cavity; 1315, first cooling interface; 1316, second cooling interface; 1317, first outer ring wall; 13171, third connecting portion; 13172, fourth connecting hole; 13173, fourth connecting groove; 13174, third connecting surface; 1318, first inner ring wall; 13181, fifth connecting portion; 13182, sixth connecting hole; 13183, sixth connecting groove; 13184 , fifth connecting surface; 132, separator; 1321, first connecting hole; 1322, first connecting groove; 1323, second connecting portion; 1324, second connecting surface; 1325a, third connecting hole; 1325b, fifth connecting hole; 1326a, third connecting groove; 1326b, fifth connecting groove; 1327a, fourth connecting portion; 1327b, sixth connecting portion; 1328a, fourth connecting surface; 1328b, sixth connecting surface; 133, stator body; 1331, core; 1332, slot wedge; 13321, Plug-in portion; 13322, first connecting portion; 13323, second connecting hole; 13324, second connecting groove; 13325, first connecting surface; 13326, limiting portion; 13327, avoidance opening; 13328, chamfered structure; 1333, winding groove; 13331, first groove wall; 13332, second groove wall; 13333, first clamping groove; 13334, second clamping groove; 13335, notch; 1334, base; 1335, shaft cavity; 14, sealing assembly; 141, first sealing member; 142, second sealing member; 20, speed change mechanism; 30, controller; 200, battery; 210, battery box; 211, first box body; 212, second box body; 220, battery cell. DETAILED DESCRIPTION

[0132] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0133] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0134] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0135] In addition, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise explicitly and specifically defined.

[0136] A motor is a power unit for electric devices. It is used to convert electrical energy into mechanical energy to drive the electric device. An axial flux motor refers to a motor in which the magnetic flux direction is axial and the current-carrying conductors are placed radially. An axial flux motor typically includes a rotor and a stator. The rotor and stator are generally disc-shaped and arranged along the axial direction of the axial flux motor. During operation of the axial flux motor, the rotor rotates while the stator remains stationary. To reduce the risk of interference between the main body of the rotor and the main body of the stator, as well as the risk of interference between the main body of the stator and other components of the axial flux motor, a housing and a separator are typically provided on the stator. The separator is provided between the main body of the stator and the main body of the rotor to separate the main body of the stator from the main body of the rotor. The housing is used to accommodate the main body of the stator to separate the main body of the stator from other components of the axial flux motor.

[0137] In the related art, in order to ensure the insulation performance of the axial flux motor, the stator separator is usually made of insulating material, for example, the stator separator is made of plastic. Therefore, the structural strength of the stator separator is poor. During the operation of the axial flux motor, the separator is easily deformed toward the rotor under the action of other external forces. When the deformation amplitude of the separator is too large, the separator will contact the main part of the rotor, resulting in interference between the separator and the main part of the rotor. Especially when the rotor rotates at high speed, it is easy to cause damage to the interior of the axial flux motor. In addition, in actual applications, the stator shell is not effectively fixed, which causes the stator shell to shake easily during the operation of the axial flux motor, thereby causing interference between the stator shell and other components of the motor, which is not conducive to improving the performance of the axial flux motor.

[0138] In order to reduce the risk of interference between the separator and the main part of the rotor and the risk of interference between the main part of the stator and other components of the axial flux motor, the axial flux motor provided in the embodiment of the present application fixedly connects the second shell and the separator to the stator body, and fixedly connects the stator body to the outer shell, so that the position of the part where the separator is fixedly connected to the stator body is relatively fixed with the position of the rotor body, effectively improving the deformation of the separator toward the rotor body, thereby effectively reducing the risk of interference between the separator and the rotor body, and at the same time enabling the stator body, the second shell and the outer shell to be relatively fixed, effectively improving the shaking of the second shell, thereby effectively reducing the risk of interference between the second shell and other components of the axial flux motor, which is beneficial to improving the performance of the axial flux motor.

[0139] The axial flux motor provided in the embodiments of the present application can be applied to electric equipment, which may be, but is not limited to, vehicles, ships, airplanes, spacecraft, excavators, cranes, lifts, elevators, etc., and is not specifically limited here.

[0140] For the convenience of description, the following embodiments are described by taking the electric device of one embodiment of the present application as a vehicle as an example.

[0141] Please refer to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application. Based on the power source, vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle. Based on the drive mode, vehicle 1000 can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. Vehicle 1000 includes a vehicle body and an electric drive system.

[0142] The vehicle body is the primary supporting component of vehicle 1000 and comprises an engine compartment and a driver's compartment. The engine compartment houses the vehicle's powertrain, electronic control system, transmission mechanism, and other components, while the driver's compartment provides operating and seating space for the driver and passengers. If vehicle 1000 is a front-wheel drive vehicle, the engine compartment is located at the front of the vehicle body, i.e., the front engine compartment. If vehicle 1000 is a rear-wheel drive vehicle, the engine compartment is located at the rear of the vehicle body, i.e., the rear engine compartment. If vehicle 1000 is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the vehicle body and the rear engine compartment located at the rear. The driver's compartment is located between the front and rear ends of the vehicle body.

[0143] The electric drive system is the power system of vehicle 1000. It is used to convert electrical energy into mechanical energy and output this mechanical energy to the wheels of vehicle 1000 to drive vehicle 1000. The electric drive system is installed on the vehicle body. Specifically, a portion of the electric drive system can be installed in the engine compartment, and another portion of the electric drive system can be installed on the bottom of the vehicle body.

[0144] Referring to FIG. 1 , the electric drive system provided in an embodiment of the present application includes a battery 200 and an electric drive device 100 .

[0145] The battery 200 is used to provide electrical energy to the electric drive device 100, and the battery 200 can be set at the bottom, head or tail of the vehicle 1000. Please refer to Figure 2, which is an exploded schematic diagram of the battery 200 provided in an embodiment of the present application. The battery 200 includes a battery box 210 and a battery cell 220, and the battery cell 220 is accommodated in the battery box 210. Among them, the battery box 210 is used to provide a storage space for the battery cell 220, and the battery box 210 can adopt a variety of structures. In some embodiments, the battery box 210 may include a first box body 211 and a second box body 212, and the first box body 211 and the second box body 212 cover each other, and the first box body 211 and the second box body 212 jointly define a storage space for accommodating the battery cell 220. The second box body 212 can be a hollow structure with one end open, and the first box body 211 can be a plate-like structure. The first box body 211 is covered on the open side of the second box body 212, so that the first box body 211 and the second box body 212 jointly define a storage space. The first box body 211 and the second box body 212 can also be hollow structures with one end open, and the open side cover of the first box body 211 is covered on the open side of the second box body 212. Of course, the battery box 210 formed by the first box body 211 and the second box body 212 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0146] In some embodiments, the battery box 210 may be part of the chassis structure of the vehicle 1000. For example, a portion of the battery box 210 may form at least a portion of the floor of the vehicle 1000, or a portion of the battery box 210 may form at least a portion of the cross member and the longitudinal member of the vehicle 1000.

[0147] Of course, in some embodiments, the battery 200 may not include the battery box 210 , but rather a plurality of battery cells 220 may be electrically connected and formed into a whole through necessary fixing structures before being assembled into the vehicle 1000 .

[0148] In the battery 200, there may be multiple battery cells 220, and the multiple battery cells 220 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 220. The multiple battery cells 220 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 220 may be housed within the battery case 210. Of course, the battery 200 may also be a battery module formed by first connecting multiple battery cells 220 in series, in parallel, or in a hybrid connection, and then the multiple battery modules may be connected in series, in parallel, or in a hybrid connection to form an entire battery cell, and then housed within the battery case 210. The battery 200 may also include other functional components, such as a busbar for electrically connecting the multiple battery cells 220.

[0149] Each battery cell 220 may be a secondary battery or a primary battery. A secondary battery refers to a battery cell 220 that can be recharged to activate its active material after discharge and continue to be used. A primary battery refers to a battery cell 220 that cannot be recharged to activate its active material after the battery cell 220's power is exhausted and continues to be used. Battery cells 220 may also be, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc. Battery cells 220 may be cylindrical, prismatic, soft-pack, or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal prismatic battery cells. Polygonal prismatic battery cells, for example, hexagonal, are not particularly limited in this application.

[0150] The electric drive device 100 is used to convert the electrical energy provided by the battery 200 into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000 to travel. The electric drive device 100 is installed in the engine compartment. Specifically, when the vehicle 1000 is a front-wheel drive vehicle, the electric drive device 100 is installed in the front engine compartment and is used to output the above-mentioned mechanical energy to the front wheels of the vehicle 1000 to drive the vehicle 1000 to move; when the vehicle 1000 is a rear-wheel drive vehicle, the electric drive device 100 is installed in the rear engine compartment and is used to output the above-mentioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000 to move; when the vehicle 1000 is a four-wheel drive vehicle, there are two electric drive devices 100, one electric drive device 100 is installed in the front engine compartment and is used to output the above-mentioned mechanical energy to the front wheels of the vehicle 1000, and the other electric drive device 100 is installed in the rear engine compartment and is used to output the above-mentioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000 to move.

[0151] Referring to Figures 3 and 4 , the electric drive device 100 includes an axial flux motor 10, which is the primary power output component of the electric drive device 100 and is used to convert electrical energy provided by a battery 200 into mechanical energy. The electric drive device 100 may also include a speed change mechanism 20, which is the power transmission mechanism of the electric drive device 100. The speed change mechanism 20 has a power input and a power output. The power input of the speed change mechanism 20 is connected to the rotating shaft 123 of the axial flux motor 10, and the power output of the speed change mechanism 20 is connected to the wheels of the vehicle 1000 to transmit the mechanical energy to the wheels of the vehicle 1000 by changing the speed and torque of the motor. The electric drive device 100 may also include a controller 30, which is used to convert the direct current output of the battery 200 into alternating current and transmit the alternating current to the motor. The controller 30 is also used to control the operation of the motor, for example, controlling the start and stop, speed, and torque of the motor.

[0152] The axial flux motor 10 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0153] First, referring to Figures 5 and 6 , an embodiment of the present application provides an axial flux motor 10, comprising a housing 11, a rotor 12, and a stator 13. The rotor 12 is housed within the housing 11 and includes a first housing 121 and a rotor body 122. The first housing 121 has a first cavity 1211 for accommodating the rotor body 122. The stator 13 is housed within the housing 11 and includes a second housing 131, a partition 132, and a stator body 133. The second housing 131 has a second cavity 1314 for accommodating the stator body 133. The partition 132 is disposed between the first housing 121 and the second housing 131 to separate the first cavity 1211 from the second cavity 1314. The second housing 131 and the partition 132 are fixedly connected to the stator body 133, which is then fixedly connected to the housing 11.

[0154] The housing 11 is used to provide an installation environment for the stator 13 and the rotor 12, and is also used as a supporting component for the axial flux motor 10. Optionally, the housing 11 can be an integrally formed component, or it can be an assembled component assembled from multiple parts. The material of the housing 11 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not specifically limited here. In some embodiments, when the housing 11 includes multiple parts, some parts of the housing 11 can be made of metals such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and other parts of the housing 11 can be made of plastic, which is not specifically limited here.

[0155] The rotor 12 is the rotating part of the axial flux motor 10. The first housing 121 provides a mounting environment for the rotor body 122 and other components of the rotor 12. The first housing 121 can be a one-piece component or assembled from multiple parts. The material of the first housing 121 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like, and is not specifically limited here.

[0156] The rotor body 122 is the main portion of the rotor 12. The rotor body 122 may include a rotor 12 bracket and multiple magnets mounted on the rotor 12 bracket. The rotor 12 may also include a rotating shaft 123, which is a component for outputting rotational mechanical energy. The rotor 12 bracket is fixedly connected to the rotating shaft 123, and multiple magnet rings are disposed on the rotating shaft 123.

[0157] The stator 13 is a fixed part of the axial flux motor 10. The second shell 131 is used to provide an installation environment for the stator body 133 and other components of the stator 13. The second shell 131 can be an integrally molded component or an assembled component assembled from multiple parts. The second shell 131 can be made entirely of insulating materials, or can be made of a composite of insulating materials and metal materials. For example, the inner layer structure of the second shell 131 is made of metal material, and the surface structure of the second shell 131 is made of insulating material. In other words, the insulating material is coated with the metal material, wherein the insulating material can be but is not limited to rubber, plastic, ceramic, glass, etc., and the metal material can be but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here.

[0158] The separator 132 is a component used to separate the first cavity 1211 of the first housing 121 from the second cavity 1314 of the second housing 131. An air gap is formed between the stator 13 and the rotor 12, and the separator 132 is disposed within this air gap. It can be understood that the separation of the first cavity 1211 from the second cavity 1314 means that components disposed within the second cavity 1314 cannot directly enter the first cavity 1211. For example, if a coolant is contained in the second cavity 1314, the coolant cannot directly enter the first cavity 1211. Similarly, components disposed within the first cavity 1211 cannot directly enter the second cavity 1314. In this embodiment, the separator 132 has a generally plate-shaped structure and intersects the central axis of the axial flux motor 10. For example, the separator 132 is perpendicular to the central axis of the axial flux motor 10. To reduce the magnetic resistance between the stator 13 and the rotor 12, the separator 132 is made of a non-magnetic material. The non-magnetic conductive material may be, but is not limited to, plastic, rubber, glass, ceramic, etc., and is not specifically limited here.

[0159] The stator body 133 is a main body portion of the stator 13. The stator body 133 is magnetically coupled to the rotor body 122 to drive the rotor body 122 to rotate.

[0160] The second housing 131 and the stator body 133 are fixedly connected, meaning that the second housing 131 and the stator body 133 are relatively fixed after being fixedly connected, that is, the second housing 131 and the stator body 133 are in a relatively static state. Optionally, the second housing 131 and the stator body 133 can be fixedly connected by, but are not limited to, welding, bonding, riveting, etc., which are not specifically limited here.

[0161] The fixed connection between the separator 132 and the stator body 133 means that the portion of the separator 132 fixedly connected to the stator body 133 is relatively fixed to the stator body 133, that is, the portion of the separator 132 fixedly connected to the stator body 133 is in a relatively static state with the stator body 133. Optionally, the separator 132 and the stator body 133 can be fixedly connected by, but is not limited to, welding, bonding, riveting, etc., which are not specifically limited here.

[0162] The stator body 133 is fixedly connected to the housing 11, which means that the stator body 133 and the housing 11 are relatively fixed after being fixedly connected, that is, the stator body 133 and the housing 11 are in a relatively static state. Optionally, the stator body 133 and the housing 11 can be fixedly connected by, but not limited to, welding, bonding, riveting, etc., which are not specifically limited here.

[0163] The axial flux motor 10 provided in the embodiment of the present application is achieved by fixing the second shell 131 and the partition 132 to the stator body 133, and fixing the stator body 133 to the outer shell 11, so that the position of the part where the partition 132 is fixedly connected to the stator body 133 is relatively fixed with the position of the rotor body 122, effectively improving the situation where the partition 132 is deformed toward the rotor body 122, thereby effectively reducing the risk of interference between the partition 132 and the rotor body 122, and at the same time enabling the stator body 133, the second shell 131 and the outer shell 11 to be relatively fixed, effectively improving the shaking of the second shell 131, thereby effectively reducing the risk of interference between the second shell 131 and other components of the axial flux motor 10, which is beneficial to improving the performance of the axial flux motor 10.

[0164] In some embodiments of the present application, please refer to Figures 5 to 7. The stator body 133 also includes multiple iron cores 1331 and multiple slot wedges 1332. Winding slots 1333 are formed between two adjacent iron cores 1331. The slot wedges 1332 are inserted into the winding slots 1333 and fixedly connected to the separator 132.

[0165] The stator body 133 may further include a winding, which is wound within the winding slots 1333. The iron core 1331 and the winding together constitute the magnetic circuit of the axial flux motor 10. When the winding is energized, the winding generates an electromagnetic field, which couples with the magnetic field of the magnetic steel to drive the rotor body 122 to rotate. In some embodiments, the stator body 133 further includes a base 1334, on which a plurality of iron cores 1331 are disposed and arranged around the rotating shaft 123 of the rotor 12. A shaft cavity 1335 may be formed in the middle of the base 1334, through which the rotating shaft 123 of the rotor 12 is passed. The winding slots 1333 have a notch 13335, through which the winding is placed into the winding slots 1333. The notch 13335 is disposed opposite the partition 132. In some embodiments, the core 1331 may be an assembled component formed by assembling multiple parts, for example, the core 1331 is formed by stacking multiple punching sheets in sequence. In other embodiments, the core 1331 may also be an integrally formed component, for example, the core 1331 is integrally formed by a casting process.

[0166] The slot wedge 1332 is a component used to secure the winding. When the winding operation is complete, the slot wedge 1332 is inserted into the winding slot 1333 to seal the notch 13335 of the winding slot 1333, thereby securing the winding within the winding slot 1333. The slot wedge 1332 can be a one-piece component or an assembled component composed of multiple parts, which is not specifically limited here. In this embodiment, the slot wedge 1332 also serves to insulate the core 1331 from the winding. Specifically, the slot wedge 1332 is made of an insulating material. To enhance the connection strength between the slot wedge 1332 and the separator 132, the slot wedge 1332 is made of the same material as the separator 132. For example, if the separator 132 is made of plastic, the slot wedge 1332 is also made of plastic.

[0167] In some embodiments, as shown in FIG8 , the slot wedge 1332 includes an inserting portion 13321 and a stopper 13326. The inserting portion 13321 is inserted into the winding slot 1333, and the stopper 13326 is connected to one end of the inserting portion 13321 and abuts against two adjacent cores 1331. The inserting portion 13321 is the main portion of the slot wedge 1332. The inserting portion 13321 is inserted into the winding slot 1333 to seal the notch 13335 of the winding slot 1333, thereby securing the winding within the winding slot 1333. The stopper 13326 is used to limit the insertion depth of the inserting portion 13321 into the winding slot 1333. This limits the position of the slot wedge 1332 within the winding slot 1333, effectively reducing the risk of the slot wedge 1332 escaping the winding slot 1333. A clearance opening 13327 is defined at the junction of the plug portion 13321 and the stop portion 13326. This clearance opening 13327 allows for clearance of the core 1331, effectively reducing interference between the slot wedge 1332 and the core 1331. To facilitate insertion of the slot wedge 1332 into the winding slot 1333, a chamfered structure 13328 is provided at the insertion end of the plug portion 13321.

[0168] In some embodiments, referring to Figures 9 to 13 , the winding groove 1333 comprises a first groove wall 13331 and a second groove wall 13332 disposed opposite each other. The first groove wall 13331 defines a first latching groove 13333, and the second groove wall 13332 defines a second latching groove 13334 opposite the first latching groove 13333. One side of the plug-in portion 13321 is inserted into the first latching groove 13333, and the other side of the plug-in portion 13321 is inserted into the second latching groove 13334. This further restricts the position of the slot wedge 1332 within the winding groove 1333, thereby further reducing the risk of the slot wedge 1332 escaping from the winding groove 1333.

[0169] By adopting the above technical solution, a slot wedge 1332 of corresponding material can be selected according to the material of the partition 132, so that the material of the slot wedge 1332 is the same as the material of the partition 132, or the material type of the slot wedge 1332 is the same as the material type of the partition 132, thereby effectively improving the connection strength between the slot wedge 1332 and the partition 132.

[0170] In some embodiments of the present application, please refer to Figures 9 and 10. The slot wedge 1332 also includes a first connecting portion 13322, which is arranged on the side of the plug-in portion 13321 facing the partition 132. The first connecting portion 13322 extends out of the winding groove 1333 and is fixedly connected to the partition 132.

[0171] At least a portion of the plug portion 13321 is disposed opposite to the partition 132 via the notch 13335 of the winding groove 1333 . The first connection portion 13322 is disposed at a portion of the plug portion 13321 opposite to the partition 132 and located on a side of the plug portion 13321 facing the partition 132 .

[0172] The first connecting portion 13322 is used to connect to the separator 132. One end of the first connecting portion 13322 is connected to the plug-in portion 13321. The other end of the first connecting portion 13322 extends through the notch 13335 of the winding groove 1333 and connects to the separator 132. The number of first connecting portions 13322 can be one or more. In this embodiment, to further enhance the connection strength between the slot wedge 1332 and the separator 132, multiple first connecting portions 13322 are provided, distributed along the length of the plug-in portion 13321.

[0173] By adopting the above technical solution, the connection stress between the slot wedge 1332 and the separator 132 is effectively reduced, thereby effectively improving the connection stability between the slot wedge 1332 and the separator 132.

[0174] In some embodiments of the present application, referring to FIG. 9 , the partition 132 defines a first connection hole 1321 , and the first connection portion 13322 is fixedly connected in the first connection hole 1321 .

[0175] First connection hole 1321 is a structure that passes through separator 132. First connection portion 13322 is connected to first connection hole 1321, that is, at least a portion of first connection portion 13322 is disposed within first connection hole 1321. First connection portion 13322 may or may not pass through first connection hole 1321, and this is not specifically limited herein. The shape of first connection portion 13322 matches the shape of first connection hole 1321. For example, if first connection portion 13322 is cylindrical, first connection hole 1321 is also cylindrical. Alternatively, if first connection portion 13322 is prismatic, first connection hole 1321 is also prismatic.

[0176] In some other embodiments of the present application, referring to FIG. 10 , the partition 132 defines a first connecting groove 1322 , and the first connecting portion 13322 is fixedly connected in the first connecting groove 1322 .

[0177] The first connecting groove 1322 is recessed on the side of the separator 132 facing the slot wedge 1332. The first connecting portion 13322 is connected to the first connecting groove 1322, that is, at least a portion of the first connecting portion 13322 is disposed in the first connecting groove 1322. The shape of the first connecting portion 13322 matches the shape of the first connecting groove 1322. For example, if the first connecting portion 13322 is cylindrical, the first connecting groove 1322 is also cylindrical. For another example, if the first connecting portion 13322 is prismatic, the first connecting groove 1322 is also prismatic.

[0178] By adopting the above technical solution, the connection area between the slot wedge 1332 and the partition 132 is effectively increased, thereby further improving the connection strength between the slot wedge 1332 and the partition 132.

[0179] In some embodiments of the present application, please refer to FIG. 11 and FIG. 12 . A second connecting portion 1323 is provided on a side of the separator 132 facing the stator body 133 . The second connecting portion 1323 extends into the winding slot 1333 and is fixedly connected to the slot wedge 1332 .

[0180] The second connecting portion 1323 is a component used to connect to the slot wedge 1332. At least a portion of the separator 132 is positioned opposite the slot wedge 1332 via the notch 13335 of the winding slot 1333. The second connecting portion 1323 is disposed at the portion of the separator 132 opposite the slot wedge 1332 and on the side of the separator 132 facing the slot wedge 1332. One end of the second connecting portion 1323 is connected to the side of the separator 132 facing the stator body 133. The other end of the second connecting portion 1323 extends into the winding slot 1333 via the notch 13335 of the winding slot 1333 and connects to the slot wedge 1332. The number of second connecting portions 1323 can be one or more. In this embodiment, to further enhance the connection strength between the slot wedge 1332 and the separator 132, multiple second connecting portions 1323 are provided, distributed along the length of the slot wedge 1332.

[0181] By adopting the above technical solution, the connection stress between the slot wedge 1332 and the separator 132 is effectively reduced, thereby effectively improving the connection stability between the slot wedge 1332 and the separator 132.

[0182] In some embodiments of the present application, referring to FIG. 11 , the plug-in portion 13321 defines a second connection hole 13323 , and the second connection portion 1323 is fixedly connected in the second connection hole 13323 .

[0183] The second connection hole 13323 is a structure that extends through the plug-in portion 13321. The second connection portion 1323 is connected to the second connection hole 13323, that is, at least a portion of the second connection portion 1323 is disposed within the second connection hole 13323. The second connection portion 1323 may or may not pass through the second connection hole 13323, and this is not specifically limited herein. The shape of the second connection portion 1323 is compatible with the shape of the second connection hole 13323. For example, if the second connection portion 1323 is cylindrical, the second connection hole 13323 is also cylindrical. For another example, if the second connection portion 1323 is prismatic, the second connection hole 13323 is also prismatic.

[0184] In some other embodiments of the present application, referring to FIG. 12 , the plug-in portion 13321 defines a second connection groove 13324 , and the second connection portion 1323 is fixedly connected in the second connection groove 13324 .

[0185] The second connecting groove 13324 is recessed on the side of the inserting portion 13321 facing the partition 132. The second connecting portion 1323 is connected to the second connecting groove 13324, that is, at least a portion of the second connecting portion 1323 is disposed within the second connecting groove 13324. The shape of the second connecting portion 1323 matches the shape of the second connecting groove 13324. For example, if the second connecting portion 1323 is cylindrical, the second connecting groove 13324 is also cylindrical. In another example, if the second connecting portion 1323 is prismatic, the second connecting groove 13324 is also prismatic.

[0186] By adopting the above technical solution, the connection area between the slot wedge 1332 and the partition 132 is effectively increased, thereby further improving the connection strength between the slot wedge 1332 and the partition 132.

[0187] In some embodiments of the present application, referring to FIG. 13 , the plug-in portion 13321 has a first connection surface 13325 on a side facing the partition 132 , and the partition 132 has a second connection surface 1324 on a side facing the stator body 133 , and the first connection surface 13325 is fixedly connected to the second connection surface 1324 .

[0188] It can be understood that the first connecting surface 13325 is arranged on the side of the plug-in portion 13321 facing the partition 132, and the second connecting surface 1324 is arranged on the side of the partition 132 facing the slot wedge 1332, and the first connecting surface 13325 and the second connecting surface 1324 are adhered to each other and connected together.

[0189] In some embodiments, the first connecting surface 13325 is a plane, and the second connecting surface 1324 is also a plane. The first connecting surface 13325 and the second connecting surface 1324 are attached to each other and connected together.

[0190] In other embodiments, the first connecting surface 13325 is a curved surface, and the second connecting surface 1324 is also a curved surface. The shape of the first connecting surface 13325 is adapted to the shape of the second connecting surface 1324 so that the first connecting surface 13325 and the second connecting surface 1324 can be attached to each other and connected together.

[0191] By adopting the above technical solution, the connection area between the slot wedge 1332 and the partition 132 is effectively increased, thereby further improving the connection strength between the slot wedge 1332 and the partition 132.

[0192] In some embodiments of the present application, the slot wedge 1332 and the separator 132 are heat-riveted, welded, or bonded.

[0193] In some embodiments, the slot wedge 1332 includes a plug-in portion 13321 and a first connection portion 13322. The plug-in portion 13321 is plugged into the winding groove 1333. The first connection portion 13322 is arranged on the side of the plug-in portion 13321 facing the partition 132. The partition 132 is provided with a first connection hole 1321. The first connection portion 13322 extends out of the winding groove 1333 and passes through the first connection hole 1321. The end of the first connection portion 13322 away from the plug-in portion 13321 is heated so that the first connection portion 13322 is hot-riveted to the first connection hole 1321.

[0194] In other embodiments, the slot wedge 1332 includes a plug-in portion 13321 and a first connecting portion 13322. The plug-in portion 13321 is plugged into the winding groove 1333. The first connecting portion 13322 is arranged on the side of the plug-in portion 13321 facing the partition 132. The partition 132 is provided with a first connecting groove 1322. The first connecting portion 13322 extends out of the winding groove 1333 and is adhered to the first connecting groove 1322.

[0195] In some other embodiments, the slot wedge 1332 includes a plug-in portion 13321, a first connecting surface 13325 is provided on the side of the plug-in portion 13321 facing the partition 132, and a second connecting surface 1324 is provided on the side of the partition 132 facing the stator body 133, and the first connecting surface 13325 and the second connecting surface 1324 are welded to each other, or the first connecting surface 13325 and the second connecting surface 1324 are bonded to each other.

[0196] By adopting the above technical solution, the slot wedge 1332 is effectively connected to the separator 132.

[0197] In some embodiments of the present application, please refer to Figures 14 to 18. The second shell 131 has a first outer ring wall 1317 arranged on the outer peripheral side of the stator body 133. The end side of the first outer ring wall 1317 facing the partition 132 is fixedly connected to the partition 132.

[0198] The first outer annular wall 1317 is a portion of the second housing 131. Together with the other walls of the second housing 131, the first outer annular wall 1317 forms the second cavity 1314. The fact that the first outer annular wall 1317 is disposed around the outer periphery of the stator body 133 means that the stator body 133 is disposed within the inner annular space of the first outer annular wall 1317. The inner annular space of the first outer annular wall 1317 can comprise the entirety or a portion of the second cavity 1314.

[0199] The end of the first outer annular wall 1317 facing the separator 132 refers to the side of the first outer annular wall 1317 that faces the separator 132 along the axial direction of the axial flux motor 10. The fixed connection between the end of the first outer annular wall 1317 facing the separator 132 and the separator 132 means that the portion of the separator 132 fixedly connected to the first outer annular wall 1317 is relatively fixed to the second housing 131, that is, the portion of the separator 132 fixedly connected to the first outer annular wall 1317 and the second housing 131 are in a relatively stationary state. Optionally, the method for fixing the first outer annular wall 1317 to the separator 132 may include, but is not limited to, welding, bonding, riveting, etc., and is not specifically limited here.

[0200] By adopting the above technical solution, the position of the part where the separator 132 is fixedly connected to the first outer ring wall 1317 is relatively fixed with the position of the rotor body 122, further improving the situation where the separator 132 is deformed toward the rotor body 122, thereby further reducing the risk of interference between the separator 132 and the rotor body 122.

[0201] In some embodiments of the present application, please refer to FIG. 14 and FIG. 15 . A third connection portion 13171 is provided on the end side of the first outer ring wall 1317 facing the partition 132 . The third connection portion 13171 is fixedly connected to the partition 132 .

[0202] The third connecting portion 13171 is a component used to connect to the separator 132. One end of the third connecting portion 13171 is connected to the end of the first outer annular wall 1317 facing the separator 132, and the other end of the third connecting portion 13171 is connected to the separator 132. The number of third connecting portions 13171 can be one or more. In this embodiment, to improve the connection strength between the first outer annular wall 1317 and the separator 132, multiple third connecting portions 13171 are provided, and the multiple third connecting portions 13171 are distributed along the circumference of the first outer annular wall 1317.

[0203] By adopting the above technical solution, it is convenient to fix the first outer ring wall 1317 and the partition 132 together.

[0204] In some embodiments of the present application, referring to FIG. 14 , the partition 132 defines a third connection hole 1325 a , and the third connection portion 13171 is fixedly connected in the third connection hole 1325 a .

[0205] The third connection hole 1325a is a structure that passes through the partition 132. The third connection portion 13171 is connected to the third connection hole 1325a, that is, at least a portion of the third connection portion 13171 is disposed within the third connection hole 1325a. The third connection portion 13171 may or may not pass through the third connection hole 1325a, and this is not specifically limited herein. The shape of the third connection portion 13171 is compatible with the shape of the third connection hole 1325a. For example, if the third connection portion 13171 is cylindrical, the third connection hole 1325a is also cylindrical. For another example, if the third connection portion 13171 is prismatic, the third connection hole 1325a is also prismatic.

[0206] In some other embodiments of the present application, referring to FIG. 15 , the partition 132 defines a third connecting groove 1326 a , and the third connecting portion 13171 is fixedly connected in the third connecting groove 1326 a .

[0207] The third connecting groove 1326a is recessed on the side of the separator 132 facing the first outer annular wall 1317. The third connecting portion 13171 is connected to the third connecting groove 1326a, that is, at least a portion of the third connecting portion 13171 is disposed within the third connecting groove 1326a. The shape of the third connecting portion 13171 matches the shape of the third connecting groove 1326a. For example, if the third connecting portion 13171 is cylindrical, the third connecting groove 1326a is also cylindrical. For another example, if the third connecting portion 13171 is prismatic, the third connecting groove 1326a is also prismatic.

[0208] By adopting the above technical solution, the connection area between the first outer annular wall 1317 and the partition 132 is effectively increased, thereby further improving the connection strength between the first outer annular wall 1317 and the partition 132.

[0209] In some embodiments of the present application, please refer to Figures 16 and 17 together. A fourth connecting portion 1327a is provided on the side of the partition 132 facing the stator body 133, and the fourth connecting portion 1327a is fixedly connected to the end side of the first outer ring wall 1317 facing the partition 132.

[0210] The fourth connecting portion 1327a is a component used to connect to the first outer annular wall 1317. The fourth connecting portion 1327a is disposed at a portion of the partition 132 that opposes the first outer annular wall 1317 and is located on the side of the partition 132 that faces the first outer annular wall 1317. One end of the fourth connecting portion 1327a is connected to the side of the partition 132 that faces the first outer annular wall 1317, and the other end of the fourth connecting portion 1327a is connected to the end of the first outer annular wall 1317 that faces the partition 132. The number of fourth connecting portions 1327a can be one or more. In this embodiment, to further enhance the connection strength between the first outer annular wall 1317 and the partition 132, multiple fourth connecting portions 1327a are provided, and the plurality of fourth connecting portions 1327a are distributed along the circumference of the first outer annular wall 1317.

[0211] By adopting the above technical solution, it is convenient to fix the first outer ring wall 1317 and the partition 132 together.

[0212] In some embodiments of the present application, referring to FIG. 16 , a fourth connection hole 13172 is defined on the end side of the first outer annular wall 1317 facing the partition 132 , and the fourth connection portion 1327 a is fixedly connected in the fourth connection hole 13172 .

[0213] The fourth connection hole 13172 is a structure that penetrates the end side of the first outer annular wall 1317 facing the partition 132. The fourth connection portion 1327a is connected to the fourth connection hole 13172, that is, at least a portion of the fourth connection portion 1327a is disposed within the fourth connection hole 13172. The fourth connection portion 1327a may or may not pass through the fourth connection hole 13172, and this is not specifically limited herein. The shape of the fourth connection portion 1327a is compatible with the shape of the fourth connection hole 13172. For example, if the fourth connection portion 1327a is a cylindrical structure, the fourth connection hole 13172 is also a cylindrical structure. For another example, if the fourth connection portion 1327a is a prismatic structure, the fourth connection hole 13172 is also a prismatic structure.

[0214] In some other embodiments of the present application, referring to FIG. 17 , a fourth connecting groove 13173 is defined on the end side of the first outer annular wall 1317 facing the partition 132 , and the fourth connecting portion 1327 a is fixedly connected in the fourth connecting groove 13173 .

[0215] The fourth connecting groove 13173 is recessed into the end of the first outer annular wall 1317 facing the partition 132. The fourth connecting portion 1327a is connected to the fourth connecting groove 13173, that is, at least a portion of the fourth connecting portion 1327a is disposed within the fourth connecting groove 13173. The shape of the fourth connecting portion 1327a matches the shape of the fourth connecting groove 13173. For example, if the fourth connecting portion 1327a is cylindrical, the fourth connecting groove 13173 also has a cylindrical structure. In another example, if the fourth connecting portion 1327a is prismatic, the fourth connecting groove 13173 also has a prismatic structure.

[0216] By adopting the above technical solution, the connection area between the first outer annular wall 1317 and the partition 132 is effectively increased, thereby further improving the connection strength between the first outer annular wall 1317 and the partition 132.

[0217] In some embodiments of the present application, referring to FIG. 18 , the first outer ring wall 1317 has a third connecting surface 13174 on the end side facing the partition 132, and the partition 132 has a fourth connecting surface 1328a on the side facing the stator body 133, and the third connecting surface 13174 is fixedly connected to the fourth connecting surface 1328a.

[0218] It can be understood that the third connecting surface 13174 is arranged on the end side of the first outer ring wall 1317 facing the partition 132, and the fourth connecting surface 1328a is arranged on the side of the partition 132 facing the first outer ring wall 1317, and the third connecting surface 13174 and the fourth connecting surface 1328a are adhered to each other and connected together.

[0219] In some embodiments, the third connecting surface 13174 is a plane, and the fourth connecting surface 1328a is also a plane. The third connecting surface 13174 and the fourth connecting surface 1328a are attached to each other and connected together.

[0220] In other embodiments, the third connecting surface 13174 is a curved surface, and the fourth connecting surface 1328a is also a curved surface. The shape of the third connecting surface 13174 is adapted to the shape of the fourth connecting surface 1328a so that the third connecting surface 13174 and the fourth connecting surface 1328a can be attached to each other and connected together.

[0221] By adopting the above technical solution, the connection area between the first outer annular wall 1317 and the partition 132 is effectively increased, thereby further improving the connection strength between the first outer annular wall 1317 and the partition 132.

[0222] In some embodiments of the present application, please refer to Figures 14 to 18. The second shell 131 also has a first inner ring wall 1318 arranged in the above-mentioned shaft cavity 1335. The first inner ring wall 1318 is arranged around the rotating shaft 123. The end side of the first inner ring wall 1318 facing the partition 132 is fixedly connected to the partition 132.

[0223] First inner annular wall 1318 is another portion of the second housing 131. The first inner annular wall 1318, the first outer annular wall 1317, and the other walls of the second housing 131 together form the second cavity 1314. The first inner annular wall 1318 being disposed around the shaft 123 means that the shaft 123 is disposed within the inner annular space of the first inner annular wall 1318.

[0224] The end of the first inner annular wall 1318 facing the separator 132 refers to the side of the first inner annular wall 1318 that faces the separator 132 along the axial direction of the axial flux motor 10. The fixed connection between the end of the first inner annular wall 1318 facing the separator 132 and the separator 132 means that the portion of the separator 132 fixedly connected to the first inner annular wall 1318 is relatively fixed to the second housing 131, that is, the portion of the separator 132 fixedly connected to the first inner annular wall 1318 and the second housing 131 are in a relatively stationary state. Optionally, the method for fixing the first inner annular wall 1318 to the separator 132 may include, but is not limited to, welding, bonding, riveting, etc., and is not specifically limited here.

[0225] By adopting the above technical solution, the position of the part where the separator 132 is fixedly connected to the first inner ring wall 1318 is relatively fixed with the position of the rotor body 122, further improving the situation where the separator 132 is deformed toward the rotor body 122, thereby further reducing the risk of interference between the separator 132 and the rotor body 122.

[0226] In some embodiments of the present application, please refer to FIG. 14 and FIG. 15 . A fifth connecting portion 13181 is provided on the end side of the first inner annular wall 1318 facing the partition 132 . The fifth connecting portion 13181 is fixedly connected to the partition 132 .

[0227] The fifth connecting portion 13181 is a component used to connect to the separator 132. One end of the fifth connecting portion 13181 is connected to the end of the first inner annular wall 1318 facing the separator 132, and the other end of the fifth connecting portion 13181 is connected to the separator 132. The number of fifth connecting portions 13181 can be one or more. In this embodiment, to improve the connection strength between the first inner annular wall 1318 and the separator 132, multiple fifth connecting portions 13181 are provided, and the multiple fifth connecting portions 13181 are distributed along the circumference of the first inner annular wall 1318.

[0228] By adopting the above technical solution, it is convenient to fix the first inner ring wall 1318 and the partition 132 together.

[0229] In some embodiments of the present application, referring to FIG. 14 , the partition 132 defines a fifth connection hole 1325 b , and the fifth connection portion 13181 is fixedly connected in the fifth connection hole 1325 b .

[0230] The fifth connection hole 1325b is a structure that passes through the partition 132. The fifth connection portion 13181 is connected to the fifth connection hole 1325b, that is, at least a portion of the fifth connection portion 13181 is disposed within the fifth connection hole 1325b. The fifth connection portion 13181 may or may not pass through the fifth connection hole 1325b, and this is not specifically limited herein. The shape of the fifth connection portion 13181 is compatible with the shape of the fifth connection hole 1325b. For example, if the fifth connection portion 13181 is cylindrical, the fifth connection hole 1325b is also cylindrical. For another example, if the fifth connection portion 13181 is prismatic, the fifth connection hole 1325b is also prismatic.

[0231] In some other embodiments of the present application, referring to FIG. 15 , the partition 132 defines a fifth connecting groove 1326 b , and the fifth connecting portion 13181 is fixedly connected in the fifth connecting groove 1326 b .

[0232] The fifth connecting groove 1326b is recessed in the side of the separator 132 facing the first inner annular wall 1318. The fifth connecting portion 13181 is connected to the fifth connecting groove 1326b, that is, at least a portion of the fifth connecting portion 13181 is disposed within the fifth connecting groove 1326b. The shape of the fifth connecting portion 13181 matches the shape of the fifth connecting groove 1326b. For example, if the fifth connecting portion 13181 is cylindrical, the fifth connecting groove 1326b is also cylindrical. In another example, if the fifth connecting portion 13181 is prismatic, the fifth connecting groove 1326b is also prismatic.

[0233] By adopting the above technical solution, the connection area between the first inner annular wall 1318 and the partition 132 is effectively increased, thereby further improving the connection strength between the first inner annular wall 1318 and the partition 132.

[0234] In some embodiments of the present application, please refer to Figures 16 and 17 together. A sixth connection portion 1327b is provided on the side of the partition 132 facing the stator body 133, and the sixth connection portion 1327b is fixedly connected to the end side of the first inner ring wall 1318 facing the partition 132.

[0235] The sixth connecting portion 1327b is a component used to connect to the end of the first inner annular wall 1318 facing the partition 132. One end of the sixth connecting portion 1327b is connected to the side of the partition 132 facing the first inner annular wall 1318, and the other end of the sixth connecting portion 1327b is connected to the end of the first inner annular wall 1318 facing the partition 132. The number of sixth connecting portions 1327b can be one or more. In this embodiment, to improve the connection strength between the first inner annular wall 1318 and the partition 132, the number of sixth connecting portions 1327b is multiple, and the multiple sixth connecting portions 1327b are distributed along the circumference of the first inner annular wall 1318.

[0236] By adopting the above technical solution, it is convenient to fix the first inner ring wall 1318 and the partition 132 together.

[0237] In some embodiments of the present application, referring to FIG. 16 , the first inner annular wall 1318 defines a sixth connecting hole 13182 , and the sixth connecting portion 1327 b is fixedly connected in the sixth connecting hole 13182 .

[0238] The sixth connection hole 13182 is a structure that penetrates the end side of the first inner annular wall 1318 facing the partition 132. The sixth connection portion 1327b is connected to the sixth connection hole 13182, that is, at least a portion of the sixth connection portion 1327b is disposed within the sixth connection hole 13182. The sixth connection portion 1327b may or may not pass through the sixth connection hole 13182, and this is not specifically limited herein. The shape of the sixth connection portion 1327b is compatible with the shape of the sixth connection hole 13182. For example, if the sixth connection portion 1327b is a cylindrical structure, the sixth connection hole 13182 is also a cylindrical structure. For another example, if the sixth connection portion 1327b is a prismatic structure, the sixth connection hole 13182 is also a prismatic structure.

[0239] In some other embodiments of the present application, referring to FIG. 17 , a sixth connecting groove 13183 is defined on the end side of the first inner annular wall 1318 facing the partition 132 , and the sixth connecting portion 1327 b is fixedly connected in the sixth connecting groove 13183 .

[0240] The sixth connecting groove 13183 is recessed into the end of the first inner annular wall 1318 facing the separator 132. The sixth connecting portion 1327b is connected to the sixth connecting groove 13183, that is, at least a portion of the sixth connecting portion 1327b is disposed within the sixth connecting groove 13183. The shape of the sixth connecting portion 1327b matches the shape of the sixth connecting groove 13183. For example, if the sixth connecting portion 1327b is cylindrical, the sixth connecting groove 13183 is also cylindrical. In another example, if the sixth connecting portion 1327b is prismatic, the sixth connecting groove 13183 is also prismatic.

[0241] By adopting the above technical solution, the connection area between the first inner annular wall 1318 and the partition 132 is effectively increased, thereby further improving the connection strength between the first inner annular wall 1318 and the partition 132.

[0242] In some embodiments of the present application, referring to FIG. 18 , the first inner ring wall 1318 has a fifth connecting surface 13184 on the end side facing the partition 132, and the partition 132 has a sixth connecting surface 1328b on the side facing the stator body 133, and the fifth connecting surface 13184 is fixedly connected to the sixth connecting surface 1328b.

[0243] It can be understood that the fifth connecting surface 13184 is arranged on the end side of the first inner ring wall 1318 facing the partition 132, and the sixth connecting surface 1328b is arranged on the side of the partition 132 facing the first inner ring wall 1318, and the fifth connecting surface 13184 and the sixth connecting surface 1328b are adhered to each other and connected together.

[0244] In some embodiments, the fifth connecting surface 13184 is a plane, the sixth connecting surface 1328b is also a plane, and the fifth connecting surface 13184 and the sixth connecting surface 1328b are attached to each other and connected together.

[0245] In other embodiments, the fifth connecting surface 13184 is a curved surface, and the sixth connecting surface 1328b is also a curved surface. The shape of the fifth connecting surface 13184 is adapted to the shape of the sixth connecting surface 1328b so that the fifth connecting surface 13184 and the sixth connecting surface 1328b can be attached to each other and connected together.

[0246] By adopting the above technical solution, the connection area between the first inner annular wall 1318 and the partition 132 is effectively increased, thereby further improving the connection strength between the first inner annular wall 1318 and the partition 132.

[0247] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 , the second housing 131 includes a frame 1311 , and the frame 1311 is fixedly connected to the stator body 133 .

[0248] The frame 1311 is a supporting component of the first housing 121. It is understood that the frame 1311 is made of a rigid material. The rigid material may include, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, carbon fiber, and the like, and is not specifically limited herein. The frame 1311 may be an integrally molded component, for example, formed integrally via a casting process. The frame 1311 may also be an assembled component composed of multiple parts, for example, the multiple parts of the frame 1311 are welded together.

[0249] The fixed connection between the skeleton 1311 and the stator body 133 means that the skeleton 1311 and the stator body 133 are relatively fixed after being fixedly connected, that is, the skeleton 1311 and the stator body 133 are in a relatively static state. Optionally, the skeleton 1311 and the stator body 133 can be fixedly connected by, but not limited to, welding, bonding, fastening, etc., and are not specifically limited here.

[0250] By adopting the above technical solution, the structural strength of the second shell 131 is effectively improved, thereby effectively reducing the risk of deformation of the second shell 131 and further reducing the risk of interference between the second shell 131 and other components of the axial flux motor 10.

[0251] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 , the skeleton 1311 is a metal member, and the skeleton 1311 is disposed on the non-air gap side of the stator body 133 .

[0252] In other words, the skeleton 1311 is made of metal material. Optionally, the metal material can be but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here.

[0253] The side of the stator body 133 facing the above-mentioned air gap is defined as the air gap side of the stator body 133, and the other sides of the stator body 133 except the air gap side are defined as the non-air gap side of the stator body 133. The non-air gap side of the stator body 133 can be the side of the stator body 133 facing away from the rotor 12, or it can be a side located between the air gap side of the stator body 133 and the side of the stator body 133 facing away from the rotor 12.

[0254] By adopting the above technical solution, the structural strength of the second housing 131 is further improved without increasing the magnetic resistance between the stator body 133 and the rotor body 122, thereby further reducing the risk of deformation of the second housing 131.

[0255] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . The skeleton 1311 includes a first frame. The first frame is disposed on a side of the stator body 133 facing away from the rotor body 122 and is fixedly connected to the stator body 133 .

[0256] The first frame is a supporting component of the skeleton 1311. The first frame is generally a plate-shaped structure and is covered on the side of the stator body 133 facing away from the rotor body 122. Optionally, the first frame can be an integrally formed component or an assembled component assembled from multiple parts. The material of the first frame can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here. In some embodiments, when the first frame includes multiple parts, the materials of the various parts of the first frame can be the same or different, and are not specifically limited here.

[0257] By adopting the above technical solution, it is convenient to fix the skeleton 1311 and the stator body 133 together.

[0258] In some embodiments of the present application, please refer to Figures 5 and 6. The first frame includes a first support portion 13111 and a seventh connection portion 13112. The first support portion 13111 is arranged around the central axis of the axial flux motor 10, and the seventh connection portion 13112 is protruded from the periphery of the first support portion 13111 and is fixedly connected to the side of the stator body 133 facing away from the rotor body 122.

[0259] The first support portion 13111 is a supporting portion of a portion of the first frame. The first support portion 13111 is arranged around the central axis of the axial flux motor 10, that is, the first support portion 13111 is arranged around the rotating shaft 123 of the rotor 12. The first support portion 13111 is generally a plate-shaped structure and is covered on the side of the stator body 133 facing away from the rotor body 122. The first support portion 13111 can be an integrally formed component, that is, the first support portion 13111 is an annular structure, and the first support portion 13111 can also be composed of multiple parts, and the multiple parts are arranged around the rotating shaft 123 of the rotor 12. Optionally, the material of the first support portion 13111 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here.

[0260] The seventh connection portion 13112 is a portion of the first frame that is fixedly connected to the stator body 133. The seventh connection portion 13112 protruding from the periphery of the first support portion 13111 means that at least a portion of the seventh connection portion 13112 protrudes from the periphery of the first support portion 13111, and the portion of the seventh connection portion 13112 that protrudes from the periphery of the first support portion 13111 is fixedly connected to the side of the stator body 133 facing away from the rotor body 122. In some embodiments, the seventh connection portion 13112 protrudes from the inner periphery of the first support portion 13111. In other embodiments, the seventh connection portion 13112 protrudes from the outer periphery of the first support portion 13111. The seventh connecting portion 13112 can be integrally formed with the first supporting portion 13111, for example, by being integrally formed with the first supporting portion 13111 through a casting process. The seventh connecting portion 13112 can also be separately connected to the first supporting portion 13111, for example, by being welded to the first supporting portion 13111. Optionally, the material of the seventh connecting portion 13112 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited herein. It is understood that when the seventh connecting portion 13112 is integrally formed with the first supporting portion 13111, the material of the seventh connecting portion 13112 is the same as the material of the first supporting portion 13111. When the seventh connecting portion 13112 is separately connected to the first supporting portion 13111, the material of the seventh connecting portion 13112 can be the same as or different from the material of the first supporting portion 13111. The seventh connection portion 13112 being fixedly connected to the stator body 133 means that the seventh connection portion 13112 and the stator body 133 are relatively fixed after being fixedly connected, that is, the seventh connection portion 13112 and the stator body 133 are in a relatively static state. Optionally, the seventh connection portion 13112 and the stator body 133 can be fixedly connected by, but is not limited to, welding, bonding, or fastening, and is not specifically limited here.

[0261] By adopting the above technical solution, it is convenient to fix the skeleton 1311 and the stator body 133 together.

[0262] In some embodiments of the present application, referring to FIG. 19 , the seventh connection portion 13112 is an annular structure and is disposed around the central axis of the axial flux motor 10 .

[0263] Taking welding as an example of the fixed connection method between the seventh connection part 13112 and the stator body 133, during the welding operation of the seventh connection part 13112 and the stator body 133, the seventh connection part 13112 and the stator body 133 can be continuously welded along the circumference of the seventh connection part 13112 to form a weld mark with a closed loop structure between the seventh connection part 13112 and the stator body 133.

[0264] By adopting the above technical solution, the connection portion between the seventh connection part 13112 and the stator body 133 can be set to a closed-loop structure. In this way, not only the connection strength between the seventh connection part 13112 and the stator body 133 is effectively improved, thereby further improving the shaking of the second shell 131, but also an annular sealing boundary can be formed between the seventh connection part 13112 and the stator body 133, and sealing can be achieved without the need to set an additional sealing structure between the side of the stator body 133 facing away from the rotor body 122 and the second shell 131, thereby effectively simplifying the structure of the stator 13.

[0265] In some embodiments of the present application, referring to FIG. 20 , the seventh connection portion 13112 includes a plurality of first connection members arranged at circumferential intervals along the first support portion 13111, and the first connection members are protruded from the periphery of the first support portion 13111 and fixedly connected to the side of the stator body 133 facing away from the rotor body 122.

[0266] It is understood that during the connection operation between the seventh connecting portion 13112 and the stator body 133, each first connecting member can be connected one by one to the side of the stator body 133 facing away from the rotor body 122. The number of first connecting members can be determined based on actual application needs, and can be 6, 8, 10, etc., and is not specifically limited here. The shape of the first connecting members can be, but is not limited to, square, elongated, triangular, etc., and is not specifically limited here.

[0267] By adopting the above technical solution, while ensuring sufficient connection strength between the seventh connecting portion 13112 and the stator body 133, the material usage of the skeleton 1311 is effectively reduced, thereby effectively reducing the production cost of the stator 13.

[0268] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . The skeleton 1311 further includes a second frame 13115 . The second frame 13115 is disposed around the outer circumference of the stator body 133 .

[0269] The second frame 13115 is another supporting component of the skeleton 1311. It has a generally cylindrical structure and is sleeved around the outer periphery of the stator body 133. The second frame 13115 can be a one-piece component, i.e., a ring-shaped structure. Alternatively, the second frame 13115 can be composed of multiple parts, arranged along the outer periphery of the stator body 133. Optionally, the material of the second frame 13115 can include, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and the like, and is not specifically limited herein.

[0270] By adopting the above technical solution, the structural strength of the second shell 131 is further improved, thereby further reducing the risk of deformation of the second shell 131.

[0271] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 , the second frame 13115 is fixedly connected to the first support portion 13111 .

[0272] The second frame 13115 being fixedly connected to the first support portion 13111 means that the second frame 13115 is relatively fixed to the first support portion 13111 after being fixedly connected, that is, the second frame 13115 and the first support portion 13111 are in a relatively static state. The second frame 13115 can be integrally formed with the first support portion 13111, for example, by being integrally formed with the first support portion 13111 through a casting process. The second frame 13115 can also be separately connected to the first support portion 13111, for example, by being welded to the first support portion 13111. The second frame 13115 can be fixedly connected to any portion of the first support portion 13111. For example, if the seventh connecting portion 13112 is protruding from the inner periphery of the first support portion 13111, the second frame 13115 can be fixedly connected to the outer periphery of the first support portion 13111.

[0273] By adopting the above technical solution, the overall structural strength of the skeleton 1311 is effectively improved, thereby further improving the structural strength of the second shell 131 and further reducing the risk of deformation of the second shell 131.

[0274] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . The second shell 131 further includes a first insulator 1312 . The first insulator 1312 covers the second frame 13115 .

[0275] The first insulator 1312 is made of an insulating material, including but not limited to rubber, silicone, glass, ceramic, etc., which are not specifically limited herein. The first insulator 1312 can be directly molded on the second frame 13115. For example, the first insulator 1312 can be molded on the second frame 13115 via an injection molding process to cover the second frame 13115. The first insulator 1312 can also be molded separately and then sleeved onto the second frame 13115 to cover the second frame 13115.

[0276] In the related art, for an axial flux motor 10, the winding slots 1333 of the stator body 133 extend through the outer periphery of the stator body 133, exposing the windings to the outer periphery of the stator body 133. By employing this technical solution, the second frame 13115 is insulated and separated from the windings of the stator 13, thereby effectively improving the insulation performance of the stator 13.

[0277] In some embodiments, to further improve the insulation performance of the stator 13 , the first insulator 1312 may further cover the first support portion 13111 .

[0278] In some embodiments of the present application, please refer to Figures 5 and 6 together. The first frame also includes a second support portion 13113 and an eighth connection portion 13114. The second support portion 13113 is arranged in the inner ring space of the first support portion 13111 and is arranged around the central axis of the axial flux motor 10. The eighth connection portion 13114 is protruded from the periphery of the second support portion 13113 and is fixedly connected to the side of the stator body 133 facing away from the rotor body 122.

[0279] The second support portion 13113 is another supporting portion of the first frame. The second support portion 13113 is generally plate-shaped and is disposed within the inner annular space of the first support portion 13111 and covers the side of the stator body 133 facing away from the rotor body 122. The second support portion 13113 being disposed within the inner annular space of the first support portion 13111 means that the first support portion 13111 is disposed around the second support portion 13113. The second support portion 13113 is disposed around the central axis of the axial flux motor 10, that is, around the rotating shaft 123 of the rotor 12. The second support portion 13113 can be an integrally formed component, i.e., it has an annular structure, or it can be composed of multiple parts, arranged around the rotating shaft 123 of the rotor 12. Optionally, the material of the second support portion 13113 may include but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here.

[0280] The eighth connection portion 13114 is another connection portion of the first frame that is fixedly connected to the stator body 133. The eighth connection portion 13114 protruding from the periphery of the second support portion 13113 means that at least a portion of the eighth connection portion 13114 protrudes from the periphery of the second support portion 13113, and the portion of the eighth connection portion 13114 that protrudes from the periphery of the second support portion 13113 is fixedly connected to the side of the stator body 133 facing away from the rotor body 122. In some embodiments, the eighth connection portion 13114 protrudes from the inner periphery of the second support portion 13113. In other embodiments, the eighth connection portion 13114 protrudes from the outer periphery of the second support portion 13113. The eighth connecting portion 13114 can be integrally formed with the second supporting portion 13113, for example, by being integrally formed with the second supporting portion 13113 through a casting process. The eighth connecting portion 13114 can also be separately connected to the second supporting portion 13113, for example, by being welded to the second supporting portion 13113. Optionally, the material of the eighth connecting portion 13114 can include, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited herein. It is understood that when the eighth connecting portion 13114 is integrally formed with the second supporting portion 13113, the material of the eighth connecting portion 13114 is the same as the material of the second supporting portion 13113. When the eighth connecting portion 13114 is separately connected to the second supporting portion 13113, the material of the eighth connecting portion 13114 can be the same as or different from the material of the second supporting portion 13113.

[0281] The eighth connection portion 13114 being fixedly connected to the stator body 133 means that the eighth connection portion 13114 and the stator body 133 are relatively fixed after being fixedly connected, that is, the eighth connection portion 13114 and the stator body 133 are in a relatively static state. Optionally, the eighth connection portion 13114 and the stator body 133 can be fixedly connected by, but is not limited to, welding, bonding, or fastening, and is not specifically limited here.

[0282] By adopting the above technical solution, not only the structural strength of the second shell 131 is further improved, thereby further reducing the risk of deformation of the second shell 131, but also the connection strength between the skeleton 1311 and the stator body 133 is further improved, thereby further improving the shaking of the second shell 131.

[0283] In some embodiments of the present application, referring to FIG. 19 , the eighth connection portion 13114 is an annular structure and is disposed around the central axis of the axial flux motor 10 .

[0284] Taking welding as an example of the fixed connection method between the eighth connection part 13114 and the stator body 133, during the welding operation of the eighth connection part 13114 and the stator body 133, the eighth connection part 13114 and the stator body 133 can be continuously welded along the circumference of the eighth connection part 13114 to form a weld mark with a closed loop structure between the eighth connection part 13114 and the stator body 133.

[0285] By adopting the above technical solution, the connection portion between the eighth connection part 13114 and the stator body 133 can be set to a closed-loop structure. In this way, not only the connection strength between the eighth connection part 13114 and the stator body 133 is effectively improved, thereby further improving the shaking of the second shell 131, but also an annular sealing boundary can be formed between the eighth connection part 13114 and the stator body 133, and sealing can be achieved without the need to set an additional sealing structure between the side of the stator body 133 facing away from the rotor body 122 and the second shell 131, thereby effectively simplifying the structure of the stator 13.

[0286] In some embodiments of the present application, referring to FIG. 20 , the eighth connection portion 13114 includes a plurality of second connection members spaced circumferentially along the second support portion 13113 , and the second connection members protrude from the periphery of the second support portion 13113 and are fixedly connected to the side of the stator body 133 facing away from the rotor body 122 .

[0287] It is understood that during the connection operation between the eighth connecting portion 13114 and the stator body 133, each second connecting member can be connected one by one to the side of the stator body 133 facing away from the rotor body 122. The number of second connecting members can be determined based on actual application needs, and can be 6, 8, 10, etc., and is not specifically limited here. The shape of the second connecting members can be, but is not limited to, square, elongated, triangular, etc., and is not specifically limited here.

[0288] By adopting the above technical solution, while ensuring sufficient connection strength between the eighth connecting portion 13114 and the stator body 133, the material usage of the skeleton 1311 is effectively reduced, thereby effectively reducing the production cost of the stator 13.

[0289] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . The skeleton 1311 further includes a third frame 13116 disposed in the shaft cavity 1335 . The third frame 13116 is disposed around the rotating shaft 123 .

[0290] The third frame 13116 is another supporting component of the skeleton 1311. The third frame 13116 is generally cylindrical in structure, disposed within the aforementioned shaft cavity 1335 and sleeved around the rotating shaft 123 of the rotor 12. The third frame 13116 can be an integrally formed component, i.e., it has an annular structure. Alternatively, the third frame 13116 can be composed of multiple parts, each of which is arranged around the rotating shaft 123 of the rotor 12. Optionally, the third frame 13116 can be made of, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and the like, and is not specifically limited herein.

[0291] By adopting the above technical solution, the structural strength of the second shell 131 is further improved, thereby further reducing the risk of deformation of the second shell 131.

[0292] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 , the third frame 13116 is fixedly connected to the second support portion 13113 .

[0293] The third frame 13116 being fixedly connected to the second support portion 13113 means that the third frame 13116 and the second support portion 13113 are relatively fixed after being fixedly connected, that is, the third frame 13116 and the second support portion 13113 are in a relatively static state. The third frame 13116 can be integrally formed with the second support portion 13113, for example, by being integrally formed with the second support portion 13113 through a casting process. The third frame 13116 can also be separately connected to the second support portion 13113, for example, by being welded to the second support portion 13113. The third frame 13116 can be fixedly connected to any portion of the second support portion 13113. For example, if the eighth connecting portion 13114 is protruding from the outer periphery of the second support portion 13113, the third frame 13116 can be fixedly connected to the inner periphery of the second support portion 13113.

[0294] By adopting the above technical solution, the overall structural strength of the skeleton 1311 is effectively improved, and the structural strength of the second shell 131 is further improved, thereby further reducing the risk of deformation of the second shell 131.

[0295] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . The second shell 131 further includes a second insulator 1313 . The second insulator 1313 covers the third frame 13116 .

[0296] The second insulator 1313 is made of an insulating material, including but not limited to rubber, silicone, glass, ceramic, etc., which are not specifically limited herein. The second insulator 1313 can be directly molded on the third frame 13116. For example, the second insulator 1313 can be molded on the third frame 13116 via an injection molding process to cover the third frame 13116. The second insulator 1313 can also be molded separately and then sleeved onto the third frame 13116 to cover the third frame 13116.

[0297] In the prior art, for an axial flux motor 10, the winding slots 1333 of the stator body 133 extend through the circumferential wall of the shaft cavity 1335, exposing the windings to the circumferential wall of the shaft cavity 1335. By employing this technical solution, the third frame 13116 is insulated and separated from the windings of the stator 13, thereby effectively improving the insulation performance of the stator 13.

[0298] In some embodiments, to further improve the insulation performance of the stator 13 , the second insulator 1313 may further cover the second support portion 13113 .

[0299] In some embodiments of the present application, the second housing 131 is sleeved on the stator body 133 and is interference-connected with the stator body 133 .

[0300] In some embodiments, when the second housing 131 includes the first outer annular wall 1317 , the first outer annular wall 1317 is sleeved on the stator body 133 and is interference fit with the stator body 133 to achieve a fixed connection between the second housing 131 and the stator body 133 .

[0301] By adopting the above technical solution, it is convenient to fix the stator body 133 and the second housing 131 together.

[0302] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . A slit 13117 is defined on the wall of the second shell 131 , and the stator body 133 is fixedly connected to the housing 11 via the slit 13117 .

[0303] In some embodiments, when the second shell 131 includes a skeleton 1311, the seventh connection portion 13112 and the eighth connection portion 13114 of the first frame of the skeleton 1311 are spaced radially along the stator 13 to form the above-mentioned gap 13117, and the stator body 133 is fixedly connected to the shell 11 through the gap 13117.

[0304] In some embodiments, the stator body 133 is fixedly connected to the housing 11 via a connector. Specifically, one side of the connector is fixedly connected to the base 1334 of the stator body 133 , and the other side of the connector is fixedly connected to the housing 11 through the gap 13117 .

[0305] In other embodiments, the housing 11 is provided with a first protrusion, which passes through the gap 13117 and is fixedly connected to the base 1334 of the stator body 133 .

[0306] In some other implementations, the base 1334 of the stator body 133 is provided with a second protrusion, and the second protrusion passes through the gap 13117 and is fixedly connected to the housing 11.

[0307] By adopting the above technical solution, it is convenient to fix the stator body 133 and the housing 11 together.

[0308] In some embodiments of the present application, the stator body 133 is sealedly connected to the second shell 131 to seal and separate the gap 13117 from the second cavity 1314, the second shell 131 is sealedly connected to the partition 132, the second cavity 1314 contains a cooling medium, and at least a portion of the stator body 133 is immersed in the cooling medium.

[0309] The cooling medium is used to absorb heat generated by the stator body 133 and other heat-generating components. The cooling medium can be statically contained within the second cavity 1314, or it can circulate into the second cavity 1314. Alternatively, the cooling medium can include, but is not limited to, cooling oil, cooling water, and the like, and is not specifically limited here.

[0310] In some embodiments, when the second shell 131 includes a skeleton 1311 and the seventh connection part 13112 and the eighth connection part 13114 of the skeleton 1311 are arranged in an annular manner on the rotating shaft 123 of the rotor 12, the seventh connection part 13112 and the stator body 133 can be continuously welded along the circumference of the seventh connection part 13112 to form a weld mark with a closed loop structure between the seventh connection part 13112 and the stator body 133, and the eighth connection part 13114 and the stator body 133 can be continuously welded along the circumference of the eighth connection part 13114 to form a weld mark with a closed loop structure between the eighth connection part 13114 and the stator body 133, so as to achieve a sealed connection between the stator body 133 and the second shell 131, thereby sealingly separating the gap 13117 from the second cavity 1314.

[0311] Of course, in other embodiments, the stator body 133 and the second housing 131 may be sealed and connected in other ways. For example, the stator body 133 and the second housing 131 may be sealed and connected by a sealing component such as a sealing ring.

[0312] The sealed connection between the second housing 131 and the partition 132 means that the first cavity 1211 cannot communicate with the external environment of the second housing 131 through the connection between the second housing 131 and the partition 132. In some embodiments, when the second housing 131 includes a first outer annular wall 1317 and a first inner annular wall 1318, the end side of the first outer annular wall 1317 facing the partition 132 and the end side of the first inner annular wall 1318 facing the partition 132 are sealedly connected to the partition 132. The method of sealing the end side of the first outer annular wall 1317 facing the partition 132 and the end side of the first inner annular wall 1318 facing the partition 132 with the partition 132 can be determined according to actual application needs. For example, a sealant can be filled between the end side of the first outer annular wall 1317 facing the partition 132 and the partition 132, and between the end side of the first inner annular wall 1318 facing the partition 132 and the partition 132, which is not specifically limited here.

[0313] By adopting the above technical solution, the second cavity 1314 is effectively separated from the first cavity 1211, which effectively improves the situation where the cooling medium in the second cavity 1314 directly enters the first cavity 1211, thereby reducing the risk of the rotor body 122 being immersed in the cooling medium and effectively reducing the loss of the axial flux motor 10.

[0314] In some embodiments of the present application, please refer to Figure 5, the second shell 131 has a first cooling interface 1315 connected to the liquid inlet pipeline and a second cooling interface 1316 connected to the liquid outlet pipeline. The first cooling interface 1315 and the second cooling interface 1316 are connected to the second cavity 1314, and the height of the first cooling interface 1315 is less than the height of the second cooling interface 1316.

[0315] The height of the first cooling interface 1315 refers to the distance between the first cooling interface 1315 and the ground plane when the axial flux motor 10 is in use. Similarly, the height of the second cooling interface 1316 refers to the distance between the second cooling interface 1316 and the ground plane when the axial flux motor 10 is in use.

[0316] By adopting the above technical solution, the cooling medium flows into the second cavity 1314 from the lower part of the second shell 131 and flows out of the second cavity 1314 from the higher part of the second shell 131. In this way, the gas in the second cavity 1314 is effectively discharged to the outside, which effectively improves the air entrainment phenomenon of the cooling medium, thereby effectively improving the cooling efficiency of the axial flux motor 10.

[0317] In some embodiments of the present application, referring to FIG. 5 , the first cooling interface 1315 is opened at the bottom of the second shell 131 , and the second cooling interface 1316 is opened at the top of the second shell 131 .

[0318] The bottom of the second shell 131 and the top of the second shell 131 can be two parts of the second shell 131 divided by the central axis of the axial flux motor 10, wherein the bottom of the second shell 131 refers to the part of the second shell 131 closest to the ground plane, and the top of the second shell 131 refers to the part of the second shell 131 farthest from the ground plane.

[0319] By adopting the above technical solution, the air entrainment phenomenon of the cooling medium is further improved, thereby further improving the cooling efficiency of the axial flux motor 10.

[0320] In some embodiments of the present application, please refer to Figure 6, the second shell 131 is sealed and connected to the partition 132, and the axial flux motor 10 also includes a sealing assembly 14, which is arranged between the outer shell 11 and the second shell 131, so that the outer shell 11, the second shell 131, and the sealing assembly 14 are enclosed to form a third cavity, and the third cavity is connected to the second cavity 1314 through the gap 13117 to form a cooling cavity, and the cooling cavity contains a cooling medium, and at least a portion of the stator body 133 is immersed in the cooling medium.

[0321] The sealing assembly 14 is used to seal the gap between the outer shell 11 and the second shell 131 to prevent the cooling medium in the cooling cavity from directly entering the first cavity 1211 .

[0322] By adopting the above technical solution, the cooling chamber is effectively separated from the first cavity 1211, which effectively improves the situation where the cooling medium in the cooling chamber directly enters the first cavity 1211, thereby reducing the risk of the rotor body 122 being immersed in the cooling medium and effectively reducing the loss of the axial flux motor 10.

[0323] In some embodiments of the present application, referring to Figure 6, the second shell 131 has a first inner ring wall 1318 and a first outer ring wall 1317 arranged around the first inner ring wall 1318, the stator body 133 is arranged between the first inner ring wall 1318 and the first outer ring wall 1317, the outer shell 11 has a second outer ring wall 111 arranged around the first outer ring wall 1317 and a second inner ring wall 112 arranged in the inner ring space of the first inner ring wall 1318, the sealing assembly 14 includes a first seal 141 and a second seal 142, the first seal 141 is arranged between the first outer ring wall 1317 and the second outer ring wall 111, and the second seal 142 is arranged between the first inner ring wall 1318 and the second inner ring wall 112.

[0324] The second inner annular wall 112 is used to provide a space for the rotation shaft 123 to be drawn out. In other words, at least a portion of the rotation shaft 123 is disposed within the inner annular space of the second inner annular wall 112. The second outer annular wall 111 is disposed around the second inner annular wall 112, that is, the second inner annular wall 112 is disposed within the inner annular space of the second outer annular wall 111. In some embodiments, a bearing is installed within the inner annular space of the second inner annular wall 112, and at least a portion of the rotation shaft 123 is mounted within the bearing.

[0325] The first inner annular wall 1318 is disposed around the second inner annular wall 112, that is, the second inner annular wall 112 is disposed in the inner annular space of the first inner annular wall 1318. The second outer annular wall 111 is disposed around the first outer annular wall 1317, that is, the first outer annular wall 1317 is disposed in the inner annular space of the second outer annular wall 111, and the first outer annular wall 1317 is disposed around the first inner annular wall 1318. In other words, the second inner annular wall 112, the first inner annular wall 1318, the first outer annular wall 1317, and the second outer annular wall 111 are nested in sequence along the radial direction of the axial flux motor 10.

[0326] The first seal 141 is a component used to seal the gap between the first outer annular wall 1317 and the second outer annular wall 111. The material of the first seal 141 may be, but is not limited to, rubber, silicone, sealant, or the like, and is not specifically limited herein. In this embodiment, the first seal 141 is annular and is disposed around the outer periphery of the first outer annular wall 1317 and pressed against the first outer annular wall 1317 and the second outer annular wall 111.

[0327] Second sealing member 142 is a component used to seal the gap between first inner annular wall 1318 and second inner annular wall 112. The material of second sealing member 142 may include, but is not limited to, rubber, silicone, sealant, and the like, and is not specifically limited herein. In this embodiment, second sealing member 142 is annular and is disposed around the outer circumference of second inner annular wall 112, pressing against first inner annular wall 1318 and second inner annular wall 112.

[0328] In some embodiments, when the axial flux motor 10 is a dual-stator 13 single-rotor 12 motor, the number of first seals 141 and the number of second seals 142 are at least two, one first seal 141 is pressed between the first outer ring wall 1317 of one stator 13 and the second outer ring wall 111 of the outer casing 11, another first seal 141 is pressed between the first outer ring wall 1317 of another stator 13 and the second outer ring wall 111 of the outer casing 11, one second seal 142 is pressed between the first inner ring wall 1318 of one stator 13 and the second inner ring wall 112 of the outer casing 11, and another second seal 142 is pressed between the first inner ring wall 1318 of another stator 13 and the second inner ring wall 112 of the outer casing 11.

[0329] In other embodiments, when the axial flux motor 10 is a dual-rotor 12 single-stator 13 motor, the number of first seals 141 and the number of second seals 142 are at least two, one first seal 141 is pressed between one end side of the first outer ring wall 1317 of the stator 13 and the second outer ring wall 111 of the outer casing 11, another first seal 141 is pressed between the other end side of the first outer ring wall 1317 of the stator 13 and the second outer ring wall 111 of the outer casing 11, one second seal 142 is pressed between one end side of the first inner ring wall 1318 of the stator 13 and the second inner ring wall 112 of the outer casing 11, and another second seal 142 is pressed between the other end side of the first inner ring wall 1318 of the stator 13 and the second inner ring wall 112 of the outer casing 11.

[0330] By adopting the above technical solution, the cooling chamber is effectively separated from the first cavity 1211, which effectively improves the situation where the cooling medium in the cooling chamber directly enters the first cavity 1211, thereby reducing the risk of the rotor body 122 being immersed in the cooling medium and effectively reducing the loss of the axial flux motor 10.

[0331] In some embodiments of the present application, please refer to Figure 6, the shell 11 has a third cooling interface 113 connected to the liquid inlet pipeline and a fourth cooling interface 114 connected to the liquid outlet pipeline. The third cooling interface 113 and the fourth cooling interface 114 are connected to the cooling cavity, and the height of the third cooling interface 113 is less than the height of the fourth cooling interface 114.

[0332] The height of the third cooling interface 113 refers to the distance between the third cooling interface 113 and the ground plane when the axial flux motor 10 is in use. Similarly, the height of the fourth cooling interface 114 refers to the distance between the fourth cooling interface 114 and the ground plane when the axial flux motor 10 is in use.

[0333] By adopting the above technical solution, the cooling medium flows into the cooling cavity from the lower part of the shell 11 and flows out of the cooling cavity from the upper part of the shell 11. In this way, the gas in the cooling cavity is effectively discharged to the outside, which effectively improves the air entrainment phenomenon of the cooling medium, thereby effectively improving the cooling efficiency of the axial flux motor 10.

[0334] In some embodiments of the present application, referring to FIG. 6 , the third cooling interface 113 is opened at the bottom of the housing 11 , and the fourth cooling interface 114 is opened at the top of the housing 11 .

[0335] The bottom of the shell 11 and the top of the shell 11 can be two parts of the shell 11 divided by the central axis of the axial flux motor 10, wherein the bottom of the shell 11 refers to the part of the shell 11 closest to the ground plane, and the top of the shell 11 refers to the part of the shell 11 farthest from the ground plane.

[0336] By adopting the above technical solution, the air entrainment phenomenon of the cooling medium is further improved, thereby further improving the cooling efficiency of the axial flux motor 10.

[0337] In some embodiments of the present application, referring to FIG. 5 and FIG. 6 , a through hole 1212 is defined in the wall of the first cavity 1211 .

[0338] Through hole 1212 is a hole portion used to connect first cavity 1211 with other spaces other than second cavity 1314. In other words, air in first cavity 1211 can enter other spaces other than second cavity 1314 through through hole 1212. For example, air in first cavity 1211 can enter the space between the outer wall of first shell 121 and the inner wall of outer shell 11 through through hole 1212. Optionally, the shape of through hole 1212 can be, but is not limited to, circular, square, triangular, etc., and is not specifically limited here.

[0339] By adopting the above technical solution, the first cavity 1211 is connected to the external space of the first shell 121. During the high-speed rotation of the rotor body 122, the air pressure in the first cavity 1211 and the air pressure in the external space of the first shell 121 can be in a balanced state, thereby effectively improving the performance of the rotor 12.

[0340] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 . There are multiple through holes 1212 , and the multiple through holes 1212 are arranged along the circumference of the rotor body 122 .

[0341] In this embodiment, the plurality of through holes 1212 are evenly distributed along the circumference of the rotor body 122. Of course, in other embodiments, the plurality of through holes 1212 are unevenly distributed along the circumference of the rotor body 122. It should be noted that the number of through holes 1212 can be set according to actual application needs, and the number of through holes 1212 can be two, three, four, five, etc., and is not specifically limited here.

[0342] By adopting the above technical solution, the air pressure in the first cavity 1211 and the air pressure in the external space of the first shell 121 are more effectively maintained in a balanced state, thereby further improving the performance of the rotor 12 .

[0343] In some embodiments of the present application, please refer to FIG. 5 and FIG. 6 , there are two stators 13 , and the rotor 12 is disposed between the two stators 13 .

[0344] In other words, the axial flux motor 10 is a motor with two stators 13 and a single rotor 12 .

[0345] In some embodiments, when the second cavity 1314 contains a cooling medium, the second cavities 1314 of the two stators 13 may be connected or not connected, which is not specifically limited here.

[0346] By adopting the above technical solution, the performance of the double-stator 13 single-rotor 12 motor is effectively improved.

[0347] In the second aspect, please refer to FIG. 3 and FIG. 4 . An embodiment of the present application further provides an electric drive device 100 , comprising the axial flux motor 10 described in any one of the above embodiments.

[0348] The electric drive device 100 provided in the embodiment of the present application adopts the above-mentioned axial flux motor 10 , thereby effectively improving the performance of the electric drive device 100 .

[0349] In a third aspect, referring to FIG. 1 , an embodiment of the present application further provides an electric drive system, including a battery 200 and the electric drive device 100 , wherein the battery 200 is electrically connected to the electric drive device 100 .

[0350] The electric drive system provided in the embodiment of the present application adopts the above-mentioned electric drive device 100, thereby effectively improving the performance of the electric drive system.

[0351] In the fourth aspect, please refer to FIG1 , an embodiment of the present application further provides an electric device, including the above-mentioned electric drive system.

[0352] The electric device provided in the embodiment of the present application adopts the above-mentioned electric drive system, thereby effectively improving the performance of the electric device.

[0353] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An axial flux motor, characterized in that: The axial flux motor comprises: shell; A rotor is accommodated in the housing, the rotor comprising a first shell and a rotor body, the first shell having a first cavity for accommodating the rotor body; A stator is accommodated in the outer shell, and the stator includes a second shell, a partition and a stator body, the second shell has a second cavity for accommodating the stator body, the partition is arranged between the first shell and the second shell to separate the first cavity from the second cavity, the second shell and the partition are fixedly connected to the stator body, and the stator body is fixedly connected to the outer shell.

2. The axial flux motor according to claim 1, characterized in that: The stator body includes a plurality of iron cores and a plurality of slot wedges. A winding slot is formed between two adjacent iron cores. The slot wedges are inserted into the winding slots and fixedly connected to the partitions.

3. The axial flux motor according to claim 2, characterized in that: The slot wedge includes an inserting portion and a first connecting portion, the inserting portion is inserted into the winding slot, the first connecting portion is arranged on a side of the inserting portion facing the partition, and the first connecting portion extends out of the winding slot and is fixedly connected to the partition.

4. The axial flux motor according to claim 3, characterized in that: The separator is provided with a first connection hole, and the first connection portion is fixedly connected in the first connection hole; or, The separator is provided with a first connecting groove, and the first connecting portion is fixedly connected in the first connecting groove.

5. The axial flux motor according to claim 2, characterized in that: A second connecting portion is provided on a side of the separator facing the stator body. The second connecting portion extends into the winding slot and is fixedly connected to the slot wedge.

6. The axial flux motor according to claim 5, characterized in that: The slot wedge comprises an inserting portion, and the inserting portion is inserted into the winding slot; The plug-in portion is provided with a second connection hole, and the second connection portion is fixedly connected in the second connection hole; or, The plug-in portion is provided with a second connection groove, and the second connection portion is fixedly connected in the second connection groove.

7. The axial flux motor according to claim 2, characterized in that: The slot wedge includes an insert portion, which is inserted into the winding slot. The insert portion has a first connecting surface on a side facing the partition, and the partition has a second connecting surface on a side facing the stator body. The first connecting surface is fixedly connected to the second connecting surface.

8. The axial flux motor according to any one of claims 2 to 7, characterized in that: The slot wedge is heat-riveted, welded or bonded to the partition.

9. The axial flux motor according to any one of claims 1 to 8, characterized in that: The second housing has a first outer annular wall arranged around the outer circumference of the stator body, and the end side of the first outer annular wall facing the partition is fixedly connected to the partition.

10. The axial flux motor according to claim 9, characterized in that: A third connecting portion is provided on the end side of the first outer ring wall facing the partition, and the third connecting portion is fixedly connected to the partition.

11. The axial flux motor according to claim 10, characterized in that: The partition is provided with a third connection hole, and the third connection portion is fixedly connected in the third connection hole; or, The partition is provided with a third connecting groove, and the third connecting portion is fixedly connected in the third connecting groove.

12. The axial flux motor according to claim 9, characterized in that: A fourth connection portion is provided on a side of the separator facing the stator body, and the fourth connection portion is fixedly connected to an end side of the first outer ring wall facing the separator.

13. The axial flux motor according to claim 12, characterized in that: A fourth connection hole is formed on the end side of the first outer ring wall facing the partition, and the fourth connection portion is fixedly connected in the fourth connection hole; or, A fourth connecting groove is formed on the end side of the first outer ring wall facing the partition, and the fourth connecting portion is fixedly connected in the fourth connecting groove.

14. The axial flux motor according to claim 9, characterized in that: The end side of the first outer ring wall facing the partition has a third connection surface, and the side of the partition facing the stator body has a fourth connection surface, and the third connection surface is fixedly connected to the fourth connection surface.

15. The axial flux motor according to any one of claims 9 to 14, characterized in that: An axial cavity is opened in the middle of the stator body, and the rotor also includes a rotating shaft fixedly connected to the rotor body, and the rotating shaft is passed through the axial cavity. The second shell also has a first inner ring wall arranged in the axial cavity, and the first inner ring wall is arranged around the rotating shaft. The end side of the first inner ring wall facing the partition is fixedly connected to the partition.

16. The axial flux motor according to claim 15, characterized in that: A fifth connecting portion is provided on the end side of the first inner ring wall facing the partition, and the fifth connecting portion is fixedly connected to the partition.

17. The axial flux motor according to claim 16, characterized in that: The partition is provided with a fifth connection hole, and the fifth connection portion is fixedly connected in the fifth connection hole; or, The partition is provided with a fifth connecting groove, and the fifth connecting portion is fixedly connected in the fifth connecting groove.

18. The axial flux motor according to claim 15, characterized in that: A sixth connection portion is provided on a side of the separator facing the stator body, and the sixth connection portion is fixedly connected to an end side of the first inner ring wall facing the separator.

19. The axial flux motor according to claim 18, characterized in that: The first inner ring wall is provided with a sixth connecting hole, and the sixth connecting portion is fixedly connected in the sixth connecting hole; or, A sixth connecting groove is formed on the end side of the first inner ring wall facing the partition, and the sixth connecting portion is fixedly connected in the sixth connecting groove.

20. The axial flux motor according to claim 15, characterized in that: The end side of the first inner ring wall facing the partition has a fifth connection surface, and the side of the partition facing the stator body has a sixth connection surface, and the fifth connection surface is fixedly connected to the sixth connection surface.

21. The axial flux motor according to any one of claims 1 to 8, characterized in that: The second shell includes a frame, and the frame is fixedly connected to the stator body.

22. The axial flux motor according to claim 21, characterized in that: The frame is a metal part, and the frame is arranged on the non-air gap side of the stator body.

23. The axial flux motor according to claim 22, characterized in that: The frame includes a first frame body, which is arranged on a side of the stator body facing away from the rotor body and is fixedly connected to the stator body.

24. The axial flux motor according to claim 23, characterized in that: The first frame includes a first supporting portion and a seventh connecting portion. The first supporting portion is arranged around the central axis of the axial flux motor. The seventh connecting portion is protruded from the periphery of the first supporting portion and is fixedly connected to a side of the stator body facing away from the rotor body.

25. The axial flux motor according to claim 24, characterized in that: The seventh connecting portion is an annular structure and is arranged around the central axis of the axial flux motor.

26. The axial flux motor according to claim 24, characterized in that: The seventh connection portion includes a plurality of first connection members spaced apart along the circumference of the first support portion. The first connection members are protruded from the periphery of the first support portion and fixedly connected to a side of the stator body facing away from the rotor body.

27. The axial flux motor according to any one of claims 24 to 26, characterized in that: The frame also includes a second frame body, and the second frame body is arranged around the outer circumference of the stator body.

28. The axial flux motor according to claim 27, characterized in that: The second frame is fixedly connected to the first supporting portion.

29. The axial flux motor according to claim 27 or 28, characterized in that: The second shell further includes a first insulator, and the first insulator covers the second frame.

30. The axial flux motor according to any one of claims 24 to 29, characterized in that: The first frame also includes a second supporting portion and an eighth connecting portion. The second supporting portion is arranged in the inner ring space of the first supporting portion and is arranged around the central axis of the axial flux motor. The eighth connecting portion is protruded from the periphery of the second supporting portion and is fixedly connected to the side of the stator body facing away from the rotor body.

31. The axial flux motor according to claim 30, characterized in that: The eighth connecting portion is an annular structure and is arranged around the central axis of the axial flux motor.

32. The axial flux motor of claim 30, wherein: The eighth connection portion includes a plurality of second connection members spaced apart along the circumference of the second support portion. The second connection members are protruded from the circumference of the second support portion and fixedly connected to a side of the stator body facing away from the rotor body.

33. The axial flux motor according to any one of claims 30 to 32, characterized in that: An axial cavity is opened in the middle of the stator body, the rotor also includes a rotating shaft fixedly connected to the rotor body, the rotating shaft passes through the axial cavity, and the skeleton also includes a third frame arranged in the axial cavity, and the third frame is arranged around the rotating shaft.

34. The axial flux motor of claim 33, wherein: The third frame is fixedly connected to the second supporting portion.

35. An axial flux motor according to claim 33 or 34, characterized in that: The second shell further includes a second insulator, and the second insulator covers the third frame.

36. The axial flux motor of claim 1, wherein: The second housing is sleeved on the stator body and is interference connected with the stator body.

37. The axial flux motor according to any one of claims 1 to 8, characterized in that: A gap is formed on the wall of the second shell, and the stator body is fixedly connected to the shell through the gap.

38. The axial flux motor of claim 37, wherein: The stator body is sealedly connected to the second shell to seal and separate the gap from the second cavity. The second shell is sealedly connected to the partition. The second cavity contains a cooling medium. At least a part of the stator body is immersed in the cooling medium.

39. The axial flux motor of claim 38, wherein: The second shell has a first cooling interface connected to the liquid inlet pipeline and a second cooling interface connected to the liquid outlet pipeline. The first cooling interface and the second cooling interface are connected to the second cavity. The height of the first cooling interface is smaller than the height of the second cooling interface.

40. The axial flux motor according to claim 39, characterized in that: The first cooling interface is opened at the bottom of the second shell, and the second cooling interface is opened at the top of the second shell.

41. The axial flux motor of claim 37, wherein: The second shell is sealed and connected to the partition. The axial flux motor also includes a sealing assembly, which is arranged between the outer shell and the second shell, so that the outer shell, the second shell, and the sealing assembly enclose a third cavity, and the third cavity is connected to the second cavity through the gap to form a cooling cavity. The cooling cavity contains a cooling medium, and at least a portion of the stator body is immersed in the cooling medium.

42. The axial flux motor of claim 41, wherein: The second shell has a first inner ring wall and a first outer ring wall arranged in an annular shape around the first inner ring wall, the stator body is arranged between the first inner ring wall and the first outer ring wall, the outer shell has a second outer ring wall arranged in annular shape around the first outer ring wall and a second inner ring wall arranged in the inner ring space of the first inner ring wall, the sealing assembly includes a first seal and a second seal, the first seal is arranged between the first outer ring wall and the second outer ring wall, and the second seal is arranged between the first inner ring wall and the second inner ring wall.

43. An axial flux motor according to claim 41 or 42, characterized in that: The shell has a third cooling interface connected to the liquid inlet pipeline and a fourth cooling interface connected to the liquid outlet pipeline. The third cooling interface and the fourth cooling interface are connected to the cooling cavity. The height of the third cooling interface is smaller than the height of the fourth cooling interface.

44. The axial flux motor of claim 43, wherein: The third cooling interface is opened at the bottom of the shell, and the fourth cooling interface is opened at the top of the shell.

45. An axial flux motor according to any one of claims 1 to 44, characterized in that: The cavity wall of the first cavity is provided with a through hole.

46. ​​The axial flux motor of claim 45, wherein: The number of the through holes is plural, and the plurality of through holes are arranged along the circumferential direction of the rotor body.

47. An axial flux motor according to any one of claims 1 to 46, characterized in that: The number of the stators is two, and the rotor is arranged between the two stators.

48. An electric drive device, characterized in that: The electric drive device comprises an axial flux motor as described in any one of claims 1-47.

49. An electric drive system, characterized in that: The electric drive system includes a battery and the electric drive device as claimed in claim 48, and the battery is electrically connected to the electric drive device.

50. An electric device, characterized in that: The electric device includes the electric drive system as claimed in claim 49.

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