Busbar, stator assembly, motor and vehicle

Abstract

The utility model relates to the field of motors, and discloses a busbar, a stator assembly, a motor and a vehicle. Wherein the busbar comprises a main body part and a connecting part, the connecting part is connected with the main body part and protrudes out of the surface of the main body part, the connecting part is used for connecting an outgoing line of the stator winding, and at least one of the main body part and the connecting part is provided with a limiting structure; wherein the limiting structure is used for being connected with the outgoing line, and the limiting structure limits the outgoing line in the protruding direction perpendicular to the connecting part. By means of the limiting matching structure formed between the outgoing line and the limiting structure, the load borne by the connecting position of the connecting part and the outgoing line can be shared, that is, the limiting matching structure formed between the outgoing line and the limiting structure and the connecting position of the connecting part and the outgoing line can jointly bear the load, and the load is prevented from being concentrated at the connecting position; therefore, the connection strength between the outgoing line and the busbar is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a bus bar, a stator assembly, a motor and a vehicle. Background Art

[0002] Flat wire motors using flat wires as flat wire stators have attracted more and more attention due to their high slot fill rate, high current carrying capacity and good heat dissipation characteristics.

[0003] In the related art, the flat wire stator includes a flat wire winding and a busbar, wherein the flat wire is led out from the end of the flat wire winding as a lead wire, the lead wire is overlapped and welded to the busbar, and the busbar is used to collect or distribute current.

[0004] During the motor assembly process, it is often necessary to adjust the position of the busbar, and to adjust the position of the busbar, the lead wire needs to be moved. Moving the lead wire will have an adverse effect on the welding strength between the lead wire and the busbar, resulting in an increased risk of cracking at the welding position between the lead wire and the busbar during the operation of the motor. Utility Model Content

[0005] In view of this, the utility model provides a busbar, a stator assembly, a motor and a vehicle to solve or improve the problem of a high risk of cracking at the welding position between the lead wire and the busbar.

[0006] In a first aspect, the utility model provides a busbar, the busbar comprising a main body and a connecting part, the connecting part is connected to the main body and protrudes from the surface of the main body, the connecting part is used to connect the lead wire of the stator winding, and at least one of the main body and the connecting part is provided with a limiting structure;

[0007] Wherein, the limiting structure is used to be connected to the lead-out wire, and in a protruding direction perpendicular to the connecting portion, the limiting structure limits the lead-out wire.

[0008] Beneficial effect: The limiting matching structure formed between the limiting structure and the lead-out wire can share the load on the connection position between the connecting part and the lead-out wire, that is, the limiting matching mechanism formed between the limiting structure and the lead-out wire and the connection position between the connecting part and the lead-out wire can bear the load together, avoiding the problem of load concentration at the connection position causing loosening or cracking of the connection position, thereby improving the connection strength between the lead-out wire and the bus.

[0009] In an optional embodiment, the limiting structure includes a limiting hole provided on the surface of the main body, the limiting hole is provided through, and the lead wire is passed through the limiting hole;

[0010] And / or, the limiting structure includes a limiting plate portion connected to the connecting portion, and the limiting plate portion surrounds or semi-surrounds the outside of the lead wire.

[0011] In an alternative embodiment, the bus bar is an integral plate-like structure, and the bus bar is provided with a first folded edge, and the first folded edge forms the connecting portion.

[0012] Beneficial effects: The connecting portion and the main body portion are provided as an integral structure, and the connecting portion protrudes from the surface of the main body portion by folding. In this way, the bus bar can be processed by folding, thereby improving the production efficiency of the bus bar and also improving the processing accuracy of the bus bar, so as to facilitate the docking of the bus bar with the lead wire.

[0013] In an alternative embodiment, the main body portion includes a plate body, a first transition plate portion and a second transition plate portion connected in sequence along a first direction;

[0014] In a direction perpendicular to the first direction, the size of the second transition plate portion is larger than the size of the first transition plate portion;

[0015] The connecting portion and the limiting hole are both provided on the second transition plate portion.

[0016] Beneficial effects: Since a limiting hole needs to be provided on the second transition plate portion, the size of the second transition plate portion is made larger than the size of the first transition plate portion. In this way, on the one hand, it is convenient to process the limiting hole on the second transition plate portion, and on the other hand, it reduces the problem of the poor strength of the second transition plate portion caused by processing the limiting hole on the second transition plate portion.

[0017] In an alternative embodiment, the connecting portion includes a first connecting plate portion and a second connecting plate portion connected in sequence along a second direction;

[0018] Wherein, the first connecting plate portion is connected to the main body portion, and in a direction perpendicular to the second direction, the size of the second connecting plate portion is smaller than the size of the first connecting plate portion, and at least one of the first connecting plate portion and the second connecting plate portion is connected to the lead wire.

[0019] Beneficial effects: The first connecting plate portion is connected to the main body portion, and the limiting hole is close to the first connecting plate portion, that is, the limiting hole is provided at the position where the first connecting plate portion is connected to the main body portion. By making the size of the first connecting plate portion larger than the size of the second connecting plate portion, it is possible to facilitate the processing of the limiting hole on the one hand and avoid the problem of the decrease in the connection strength between the first connecting plate portion and the main body portion after processing the limiting hole on the other hand.

[0020] In an alternative embodiment, at least two of the connecting portions are provided on the main body portion, and the connecting portions are respectively connected to the corresponding lead-out wires. At least one of the connecting portion and the main body portion is provided with the limiting structure corresponding to the connecting portion one by one, and the limiting structures are respectively in limiting cooperation with the corresponding lead-out wires.

[0021] Advantageous effects: By providing at least two connecting portions and the limiting holes corresponding to the connecting portions one by one, the bus bar can be connected to a plurality of lead-out wires, so that the bus bar is suitable for occasions where a plurality of lead-out wires need to be connected. In addition, each lead-out wire is connected to the corresponding connecting portion and limited by the corresponding limiting hole, so that a high connection strength is achieved between each lead-out wire and the bus bar.

[0022] In an alternative embodiment, the bus bar further includes a mounting portion, which is connected to the main body portion and protrudes from the surface of the main body portion, and the mounting portion is used for connecting a terminal.

[0023] Advantageous effects: By providing the mounting portion, it is convenient for the bus bar to be connected to the terminal.

[0024] In an alternative embodiment, the bus bar is an integral plate-like structure, and the bus bar is provided with a second folded edge, and the second folded edge forms the mounting portion.

[0025] Advantageous effects: The mounting portion and the main body portion are provided as an integral structure, and the mounting portion protrudes from the surface of the main body portion by folding. In this way, the bus bar can be processed by folding, so as to improve the production efficiency of the bus bar and also improve the processing accuracy of the bus bar, so as to facilitate the butt joint between the bus bar and the lead-out wire.

[0026] In a second aspect, the present invention further provides a stator assembly, including a stator winding and the bus bar as described above. The stator winding has lead-out wires, and both the connecting portion and the limiting structure are connected to the lead-out wires.

[0027] Advantageous effects; The stator assembly includes the bus bar, and thus includes all the above advantages of the bus bar, so details are not described herein again.

[0028] In a third aspect, the present invention further provides a motor, including the bus bar as described above, or the stator assembly as described above.

[0029] Advantageous effects; The motor includes the bus bar, and thus includes all the above advantages of the bus bar, so details are not described herein again.

[0030] In a fourth aspect, the present invention further provides a vehicle, including the motor as described above.

[0031] Beneficial effects: The vehicle includes a busbar, and thus incorporates all the above advantages of the busbar, so they will not be elaborated here. Description of the Drawings

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Structural schematic diagram of a stator assembly according to an embodiment of the present invention;

[0034] Figure 2 is Figure 1 axonometric view of the stator assembly shown;

[0035] Figure 3 Cross-sectional view of the stator assembly according to an embodiment of the present invention;

[0036] Figure 4 Structural schematic diagram of a busbar according to an embodiment of the present invention;

[0037] Figure 5 is Figure 4 force analysis diagram of the busbar and the lead wire shown;

[0038] Figure 6 is Figure 5 top view of the view shown;

[0039] Figure 7 Structural schematic diagram of another stator assembly according to an embodiment of the present invention;

[0040] Figure 8 Structural schematic diagram of another busbar according to an embodiment of the present invention;

[0041] Figure 9 Structural schematic diagram of a limiting plate portion according to an embodiment of the present invention;

[0042] Figure 10 Structural schematic diagram of another limiting plate portion according to an embodiment of the present invention.

[0043] Description of the reference numerals:

[0044] 1. Busbar; 101. Main body; 1011. Plate; 1012. First transition plate; 1013. Second transition plate; 102. Connecting portion; 1021. First connecting plate; 1022. Second connecting plate; 103. Mounting portion; 104. Limiting structure; 1041. Limiting hole; 1042. Limiting plate; 2. Stator winding; 201. Lead wire; 3. Terminal. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0046] In the related art, during the motor assembly process, it is often necessary to adjust the position of the busbar, and the busbar is connected to the lead wire of the flat wire winding, so the lead wire needs to be moved to adjust the busbar. When the lead wire is moved, the load acts on the welding position between the lead wire and the busbar, which can easily affect the welding strength between the lead wire and the busbar, resulting in a decrease in the connection strength between the lead wire and the busbar. During the operation of the motor, the welding position between the lead wire and the busbar is at an increased risk of cracking under conditions such as vibration or bumps.

[0047] In order to solve or improve the problem of high risk of cracking at the welding position between the lead wire and the bus bar, the embodiments of the present invention provide a bus bar, a stator assembly, a motor and a vehicle.

[0048] Combine the following Figures 1 to 10 , describing the bus provided in an embodiment of the present utility model.

[0049] Specifically, the busbar 1 includes a main body 101 and a connecting portion 102. For example, the busbar 1 can be configured as a copper busbar or an aluminum busbar.

[0050] The connecting portion 102 is connected to the main body 101, and the connecting portion 102 protrudes from the surface of the main body 101. The connecting portion 102 is used to connect the lead wire 201 of the stator winding 2. For example, the connecting portion 102 is welded to the lead wire 201, riveted by an anchor, or connected by a threaded fastener. At least one of the main body 101 and the connecting portion 102 is provided with a limiting structure 104. The main body 101 can be used to connect to the terminal 3, and the terminal 3 is used to connect to the electrical components outside the motor.

[0051] Furthermore, the limiting structure 104 is also used to connect with the lead wire 201, and the limiting structure 104 limits the lead wire 201 in a protruding direction perpendicular to the connecting portion 102. For example, the limiting structure 104 is used to limit the lead wire 201 in a direction parallel to the surface of the main body 101.

[0052] In this embodiment, the limit matching structure formed between the lead-out wire 201 and the limit structure 104 can share the load on the connection position between the connecting part 102 and the lead-out wire 201, that is, the limit matching mechanism formed between the lead-out wire 201 and the limit structure 104 and the connection position between the connecting part 102 and the lead-out wire 201 can bear the load together, avoiding the problem of load concentration at the connection position causing loosening or cracking of the connection position, thereby improving the connection strength between the lead-out wire 201 and the bus 1.

[0053] Specifically, on the one hand, reference Figure 5 As shown, the limiting matching structure formed between the lead wire 201 and the limiting structure 104 can bear the normal load F1 received by the connection position. It can be understood that the normal load F1 is perpendicular to the joint surface between the lead wire 201 and the connection part 102. Figure 6 As shown, the limiting matching structure formed between the lead wire 201 and the limiting structure 104 can bear the tangential load F2 parallel to the surface of the main body 101 exerted on the connection position. It can be understood that the tangential load F2 is parallel to the joint surface between the lead wire 201 and the connection part 102.

[0054] In this way, when the lead wire 201 is pulled to bend, the load is dispersed in the limit matching mechanism formed between the lead wire 201 and the limit structure 104 and the connection position between the connecting portion 102 and the lead wire 201, thereby reducing the load on the connection position, thereby reducing the risk of loosening or cracking. In addition, when the motor is running in vibration or bumpy conditions, the vibration load is also dispersed in the limit matching mechanism formed between the lead wire 201 and the limit structure 104 and the connection position between the connecting portion 102 and the lead wire 201, thereby reducing the load on the connection position, thereby reducing the risk of loosening or cracking.

[0055] Optionally, the busbar 1 may be a phase busbar, and correspondingly, the lead wire 201 is a branch lead wire of a phase winding. Alternatively, the busbar 1 may also be a neutral point busbar, and correspondingly, the lead wire 201 is a neutral point lead wire.

[0056] refer to Figures 1 - 6As shown, in some embodiments provided by the present utility model, the limiting structure 104 includes a limiting hole 1041 provided on the surface of the main body 101, and the limiting hole 1041 is provided through, that is, the limiting hole 1041 passes through the main body 101 along the protruding direction of the connecting portion 102. The lead wire 201 is passed through the limiting hole 1041, that is, the limiting hole 1041 forms a limit for the lead wire 201. In this way, the limiting hole 1041 can limit the lead wire 201 360 degrees in the protruding direction perpendicular to the connecting portion 102, thereby providing a better limiting effect for the lead wire 201.

[0057] Of course, the limiting structure 104 is not limited to including the limiting hole 1041. For example, in other embodiments provided by the present invention, the limiting structure 104 includes a limiting plate portion 1042 connected to the connecting portion 102. Figure 10 As shown, the limiting plate portion 1042 can surround the outside of the lead wire 201, so that the lead wire 201 can be limited 360 degrees in the protruding direction perpendicular to the connecting portion 102, thereby providing a better limiting effect for the lead wire 201. Alternatively, refer to Figure 9 As shown, the limiting plate portion 1042 may also be semi-enclosed on the outside of the lead-out line 201 , so that the structure of the limiting plate portion 1042 is relatively simple and the processing difficulty is relatively low.

[0058] Optionally, refer to Figures 9 - 10 As shown, the connection portion 102 is provided with a semi-circular or annular folded edge, and the folded edge forms a limiting plate portion 1042. Of course, the limiting plate portion 1042 can also be bonded or welded to the connection portion 102.

[0059] refer to Figure 2 and Figure 3 As shown, in some embodiments provided by the present invention, the connection portion 102 protrudes from the surface of the main body 101 away from the stator winding 2. Of course, the connection portion 102 is not limited to protruding from the surface of the main body 101 away from the stator winding 2. For example, in other embodiments provided by the present invention, the connection portion 102 may also protrude from the surface of the main body 101 facing the stator winding 2.

[0060] In some embodiments provided by the present invention, the busbar 1 is an integrated plate-shaped structure, and the busbar 1 is provided with a first folded edge, and the first folded edge forms a connecting portion 102 .

[0061] In this embodiment, the connecting portion 102 and the main body 101 are arranged as an integral structure, and the connecting portion 102 protrudes from the surface of the main body 101 by folding. In this way, the bus 1 can be processed by folding, thereby improving the production efficiency of the bus 1 and also improving the processing accuracy of the bus 1, so as to facilitate the connection between the bus 1 and the lead wire 201.

[0062] Of course, the connecting portion 102 is not limited to protruding from the surface of the main body portion 101 by folding. For example, the connecting portion 102 can also be welded to the surface of the main body portion 101. Alternatively, the connecting portion 102 is connected to the main body portion 101 through a connecting member, and the connecting member can be a threaded connecting member or a riveting member.

[0063] In some embodiments provided by the present utility model, at least two connecting portions 102 are provided on the main body portion 101, and the connecting portions 102 are respectively connected to corresponding lead-out wires 201. At least one of the connecting portion 102 and the main body portion 101 is provided with a limiting structure 104 corresponding to the connecting portion 102 one by one, and the limiting structures 104 are respectively in limiting cooperation with the corresponding lead-out wires 201.

[0064] In this embodiment, by providing at least two connecting portions 102 and the limiting structures 104 corresponding to the connecting portions 102, the bus bar 1 can be connected to a plurality of lead-out wires 201, so that the bus bar is applicable to occasions where a plurality of lead-out wires 201 need to be connected. In addition, each lead-out wire 201 is connected to the corresponding connecting portion 102 and is limited by the corresponding limiting structure 104, so that a relatively high connection strength is provided between each lead-out wire 201 and the bus bar 1.

[0065] Reference Figure 4 and Figure 6 As shown, in some embodiments provided by the present utility model, the main body portion 101 includes a plate body 1011, a first transition plate portion 1012, and a second transition plate portion 1013 that are sequentially connected in a first direction.

[0066] In a direction perpendicular to the first direction, the size of the second transition plate portion 1013 is larger than that of the first transition plate portion 1012. The connecting portion 102 and the limiting hole 1041 are both provided on the second transition plate portion 1013. It should be noted that the first direction refers to Figure 5 the a direction in Figure 6 or the left-right direction in Figure 6 The direction perpendicular to the first direction refers to the vertical direction in

[0067] In this embodiment, referring to Figure 1 , Figure 2 and Figure 6 As shown, since the limiting hole 1041 needs to be provided on the second transition plate portion 1013, the size of the second transition plate portion 1013 is made larger than that of the first transition plate portion 1012. On the one hand, it is convenient to process the limiting hole 1041 on the second transition plate portion 1013. On the other hand, the problem of the reduced strength of the second transition plate portion 1013 caused by processing the limiting hole 1041 on the second transition plate portion 1013 is reduced.

[0068] ReferenceFigure 4 As shown, in addition, when the connecting portions 102 are provided in plurality, the first transition plate portions 1012 and the second transition plate portions 1013 are also provided in plurality, and the first transition plate portions 1012, the second transition plate portions 1013 and the connecting portions 102 are connected in one-to-one correspondence. There are spaces between adjacent connecting portions 102, between adjacent first transition plate portions 1012 and between adjacent second transition plate portions 1013. By making the size of the first transition plate portion 1012 smaller than that of the second transition plate portion 1013, the space between adjacent first transition plate portions 1012 can be increased, so as to increase the processing space between adjacent first transition plate portions 1012, facilitate the setting of rounded corners between the first transition plate portion 1012 and the plate body 1011, and further reduce the problem of stress concentration at the connection between the first transition plate portion 1012 and the plate body 1011.

[0069] Reference Figure 4 and Figure 6 As shown in the reference and, in some embodiments provided by the present utility model, the connecting portion 102 includes a first connecting plate portion 1021 and a second connecting plate portion 1022 connected in sequence along the second direction.

[0070] Wherein, the first connecting plate portion 1021 is connected to the main body portion 101. In the direction perpendicular to the second direction, the size of the second connecting plate portion 1022 is smaller than that of the first connecting plate portion 1021, and at least one of the first connecting plate portion 1021 and the second connecting plate portion 1022 is connected to the lead-out wire 201. It should be noted that the second direction refers to Figure 5 the b direction in, or Figure 6 the direction perpendicular to the paper plane in. The direction perpendicular to the second direction refers to Figure 6 the vertical direction in.

[0071] In this embodiment, the first connecting plate portion 1021 is connected to the main body portion 101, and the limiting hole 1041 is close to the first connecting plate portion 1021, that is, the limiting hole 1041 is arranged at the position where the first connecting plate portion 1021 is connected to the main body portion 101. By making the size of the first connecting plate portion 1021 larger than that of the second connecting plate portion 1022, on the one hand, it is convenient to process the limiting hole 1041, and on the other hand, the problem of the reduction of the connection strength between the first connecting plate portion 1021 and the main body portion 101 caused by processing the limiting hole 1041 can be avoided.

[0072] Optionally, the first connecting plate portion 1021 is connected to the second transition plate portion 1013, and the sizes of the first connecting plate portion 1021 and the second transition plate portion 1013 are the same, so as to avoid the problem of sudden change in cross section between the first connecting plate portion 1021 and the second transition plate portion 1013 and reduce the problem of stress concentration. For example, the first connecting plate portion 1021 and the second transition plate portion 1013 are arranged as an integral structure.

[0073] Optionally, the size of the second connecting plate portion 1022 is the same as that of the lead wire 201, so that it is convenient to perform lap welding on the lead wire 201 and the second connecting plate portion 1022.

[0074] In some embodiments provided by the present utility model, the bus bar 1 further includes a mounting portion 103. The mounting portion 103 is connected to the main body portion 101 and protrudes from the surface of the main body portion 101. The mounting portion 103 is used to connect the terminal 3. The terminal 3 is used to connect to electrical components outside the motor.

[0075] In this embodiment, by providing the mounting portion 103, it is convenient to connect the bus bar 1 to the terminal 3.

[0076] Optionally, the bus bar 1 is an integral plate-like structure, and the bus bar 1 is provided with a second folded edge, and the second folded edge forms the mounting portion 103.

[0077] In this embodiment, the mounting portion 103 and the main body portion 101 are arranged as an integral structure, and the mounting portion 103 protrudes from the surface of the main body portion 101 by folding. In this way, the bus bar 1 can be processed by folding, thereby improving the production efficiency of the bus bar 1 and also improving the processing accuracy of the bus bar 1, so as to facilitate the docking of the bus bar 1 with the lead wire 201.

[0078] In the embodiments of the present utility model, a stator assembly is also provided. For example, the stator assembly can be a flat wire stator.

[0079] Specifically, the stator assembly includes a stator winding 2 and the bus bar as described above. The stator winding 2 has lead wires. For example, the stator winding 2 can be a flat wire winding. The lead wire 201 is connected to the connecting portion 102. For example, the lead wire 201 is welded to the connecting portion 102, riveted by an anchor or connected by a threaded fastener. The lead wire 201 is also connected to a limiting structure. In a direction perpendicular to the protruding direction of the connecting portion 102, the limiting structure forms a limit on the lead wire 201. For example, the limiting structure 104 includes a limiting hole 1041, and the lead wire 201 is inserted into the limiting hole 1041, or the limiting structure 104 includes a limiting plate portion 1042, and the limiting plate portion 1042 surrounds or semi-surrounds the outside of the lead wire 201.

[0080] It should be noted that since the stator assembly includes the bus bar, it also includes all the above advantages of the bus bar, so it will not be elaborated here.

[0081] In some embodiments provided by the present utility model, the stator winding 2 is wound around a stator core. The side of the main body portion 101 is provided with an arc-shaped structure, and the arc-shaped structure is coaxially arranged with the stator core. At least two connecting portions 102 are arranged at intervals along the arc-shaped structure in sequence.

[0082] During the motor assembly process, the stator winding 2 is wound around the stator core. Therefore, when the number of lead wires 201 is multiple, the multiple lead wires 201 are arranged circumferentially along the stator core. In this embodiment, by setting the side of the main body portion 101 as an arc structure, during assembly, the arc structure can be coaxially aligned with the positioning core, so that at least two connecting portions 102 are arranged circumferentially along the positioning core, and further, the arrangement direction of the connecting portions 102 is the same as the arrangement direction of the lead wires 201, facilitating the docking of the connecting portions 102 with the corresponding lead wires 201.

[0083] An embodiment of the present utility model also provides a motor. For example, the motor is set as a flat wire motor.

[0084] Specifically, the motor includes the busbar or the stator assembly as described above.

[0085] It should be noted that since the motor includes the busbar, it also includes all the above advantages of the busbar, so it will not be elaborated here.

[0086] An embodiment of the present utility model also provides a vehicle.

[0087] Specifically, the vehicle includes the motor as described above.

[0088] It should be noted that since the vehicle includes the busbar, it also includes all the above advantages of the busbar, so it will not be elaborated here.

[0089] Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A busbar, characterized in that: The busbar (1) comprises a main body (101) and a connecting part (102); the connecting part (102) is connected to the main body (101) and protrudes from the surface of the main body (101); the connecting part (102) is used to connect the lead wire (201) of the stator winding (2); at least one of the main body (101) and the connecting part (102) is provided with a limiting structure (104); The limiting structure (104) is used to be connected to the lead wire (201), and the limiting structure (104) limits the lead wire (201) in a protruding direction perpendicular to the connecting portion (102).

2. The busbar according to claim 1, characterized in that: The limiting structure (104) comprises a limiting hole (1041) arranged on the surface of the main body (101); the limiting hole (1041) is arranged through, and the lead wire (201) is passed through the limiting hole (1041); And / or, the limiting structure (104) comprises a limiting plate portion (1042) connected to the connecting portion (102), and the limiting plate portion (1042) surrounds or semi-surrounds the outer side of the lead-out line (201).

3. The busbar according to claim 2, characterized in that: The busbar (1) is an integrated plate-shaped structure, and the busbar (1) is provided with a first folded edge, wherein the first folded edge forms the connecting portion (102).

4. The busbar according to claim 3, characterized in that: The main body (101) comprises a plate body (1011), a first transition plate portion (1012) and a second transition plate portion (1013) which are sequentially connected along a first direction; In a direction perpendicular to the first direction, the size of the second transition plate portion (1013) is greater than the size of the first transition plate portion (1012); The connecting portion (102) and the limiting hole (1041) are both arranged on the second transition plate portion (1013); And / or, the connecting portion (102) comprises a first connecting plate portion (1021) and a second connecting plate portion (1022) which are sequentially connected along the second direction; The first connecting plate portion (1021) is connected to the main body portion (101), and in a direction perpendicular to the second direction, the size of the second connecting plate portion (1022) is smaller than the size of the first connecting plate portion (1021), and at least one of the first connecting plate portion (1021) and the second connecting plate portion (1022) is connected to the lead wire (201).

5. The busbar according to any one of claims 1 to 4, characterized in that: At least two connecting parts (102) are arranged on the main body (101), and the connecting parts (102) are respectively connected to the corresponding lead wires (201), and at least one of the connecting parts (102) and the main body (101) is provided with a limiting structure (104) corresponding to the connecting part (102) one by one, and the limiting structure (104) is respectively matched with the corresponding lead wires (201) in a limiting manner.

6. The busbar according to any one of claims 1 to 4, characterized in that: The busbar (1) further comprises a mounting portion (103), wherein the mounting portion (103) is connected to the main body (101) and protrudes from the surface of the main body (101), and the mounting portion (103) is used for connecting terminals (3).

7. The busbar according to claim 6, characterized in that: The busbar (1) is an integrated plate-shaped structure, and the busbar (1) is provided with a second folded edge, wherein the second folded edge forms the mounting portion (103).

8. A stator assembly, characterized in that: It comprises a stator winding (2) and a busbar as claimed in any one of claims 1 to 7, wherein the stator winding (2) has a lead wire (201), and the connecting portion (102) and the limiting structure (104) are both connected to the lead wire (201).

9. A motor, characterized in that: It comprises the busbar according to any one of claims 1 to 7, or the stator assembly according to claim 8.

10. A vehicle, characterized in that: Comprising the motor as claimed in claim 9.

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