Busbar assembly, motor and automobile

Abstract

The utility model provides a busbar assembly, a motor and an automobile, and relates to the technical field of motors, the busbar assembly comprises a three-phase copper bar and a star point copper bar which respectively extend along the circumferential direction of a motor stator, the three-phase copper bar comprises three phase copper bars, and the three phase copper bars and the star point copper bar respectively comprise a copper bar body. The copper bar body of the star point copper bar is used for being arranged parallel to the axial end face of the motor stator, and the copper bar bodies of the three phase copper bars are respectively and relatively perpendicular to the plane where the copper bar body of the star point copper bar is located. Taking the motor stator vertically arranged and the copper bar body of the star point copper bar horizontally arranged at one axial end of the motor stator as an example, the copper bar bodies of the three phase copper bars are respectively relatively perpendicular to the plane where the copper bar body of the star point copper bar is located, that is, the copper bar bodies of the three phase copper bars are vertically arranged. Not only can the structural strength be further improved, but also the axial space occupation of the motor can be reduced, and the overall size of the motor can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a busbar component, a motor and a car. Background Art

[0002] Flat wire motors are widely used in new energy vehicles due to their high power density and slot fill rate. Flat wire motors include a motor housing, a busbar and a motor stator located inside the motor housing. The busbar is located at one end of the motor stator and is used to connect the stator winding of the motor stator with an external controller. It is an important component of the flat wire motor.

[0003] There are usually two types of existing busbars: the first type uses multiple braided soft copper wires. Although it occupies a small space, it has poor structural strength and is easily deformed and displaced. It usually requires the help of a fixed bracket to achieve its positioning and installation on the motor housing; the second type uses multiple copper bars stacked and spaced along the axial direction of the motor stator. Although it can improve the strength to a certain extent, it occupies a large axial space of the motor, making the overall volume of the motor larger. Utility Model Content

[0004] The utility model aims to solve the technical problem that the existing busbar cannot take into account both the structural strength and the axial space occupied by the motor.

[0005] In a first aspect, the utility model provides a busbar assembly, comprising a three-phase copper bar and a star-point copper bar respectively extending along the circumferential direction of a motor stator, wherein the three-phase copper bar comprises three phase copper bars, and the three phase copper bars and the star-point copper bar each comprise a copper bar body, and the copper bar body of the star-point copper bar is used to be arranged parallel to the axial end face of the motor stator, and the copper bar bodies of the three phase copper bars are respectively arranged perpendicularly relative to the plane where the copper bar body of the star-point copper bar is located.

[0006] Optionally, the copper bar body of each phase copper bar is arranged vertically, the copper bar body of the star point copper bar is arranged horizontally, the bottom of the phase copper bar is flush with the copper bar body of the star point copper bar or part of the phase copper bar is located below the copper bar body of the star point copper bar.

[0007] Optionally, the busbar assembly further includes an injection molded part, wherein the injection molded part at least partially wraps the three-phase copper busbar and the star-point copper busbar, and the injection molded part, the three-phase copper busbar, and the star-point copper busbar are integrally formed.

[0008] Optionally, the busbar assembly further comprises a temperature detection device, the injection molded part is provided with an installation cavity which exposes a portion of the copper busbar body, and the temperature detection device is placed in the installation cavity and in contact with the exposed copper busbar body.

[0009] Optionally, each of the phase copper bars and the star point copper bar also includes a copper bar pin, the copper bar pin is located on the side of the copper bar body facing inward along the radial direction of the motor stator and is used to connect to the stator winding, the copper bar pin of each phase copper bar is bent 180° relative to the copper bar body, and the temperature detection device is arranged close to the corresponding copper bar pin.

[0010] Optionally, each of the phase copper bars further comprises a lead terminal, the copper bar pin of the phase copper bar is arranged at one end of the copper bar body along the circumference of the motor stator, one end of the copper bar body of the phase copper bar away from the copper bar pin is bent toward the inner direction close to the motor stator, and is connected to the lead terminal so that the lead terminal does not exceed the circumferential outer edge of the motor stator.

[0011] Optionally, the three-phase copper bar includes a U-phase copper bar, a V-phase copper bar and a W-phase copper bar which are arranged in sequence from the inside to the outside along the radial direction of the motor stator, and the U-phase copper bar, the V-phase copper bar and the W-phase copper bar are staggered along the circumferential direction of the motor stator. The star-point copper bar is located at one end of the V-phase copper bar where the copper bar pin is provided along the circumferential direction of the motor stator, and the temperature detection device is arranged between the V-phase copper bar and the U-phase copper bar.

[0012] Optionally, the busbar assembly further comprises a fixing sleeve, the strength of the fixing sleeve is greater than the strength of the injection molded part, a boss is provided on one side of the injection molded part radially facing the inside of the motor stator, a positioning structure is provided on the fixing sleeve, the positioning structure comprises limiting bosses provided at both axial ends of the fixing sleeve and an anti-rotation plane structure provided on a circumferential side wall of the fixing sleeve, the fixing sleeve is mounted on the boss via the limiting boss and the anti-rotation plane structure, and the injection molded part is used to be fixed to the motor housing via the fixing sleeve;

[0013] And / or, the busbar assembly further comprises a rivet nut, wherein the rivet nut is embedded in the lead terminal, and the lead terminal is used to be connected to the copper busbar of the controller via the rivet nut.

[0014] In a second aspect, the utility model provides a motor, comprising the above-mentioned busbar assembly.

[0015] In a third aspect, the utility model provides a car, comprising the above-mentioned motor.

[0016] The busbar assembly, motor and automobile of the present invention have at least the following advantages compared with the prior art:

[0017] Taking the vertical setting of the motor stator as an example, the copper bar body of the star-point copper bar of the busbar assembly can be horizontally set above the motor stator, that is, the copper bar body of the star-point copper bar is parallel to the axial end face of the motor stator, the three-phase copper bar includes three phase copper bars, and the copper bar bodies of the three phase copper bars are respectively arranged vertically relative to the plane where the copper bar body of the star-point copper bar is located, that is, the copper bar bodies of the three phase copper bars are vertically set or upright, compared with the copper bar bodies of the three phase copper bars of the busbar being horizontally set, the copper bar bodies of the star-point copper bars being horizontally set, and each copper bar body being stacked in sequence vertically, in this embodiment, the copper bar bodies of the three phase copper bars of the busbar assembly are vertically set, the copper bar body of the star-point copper bar is horizontally set, the copper bar body of the star-point copper bar can withstand a larger horizontal force, and the copper bar bodies of the three phase copper bars can withstand a larger vertical force, so that the entire busbar assembly can be vertically set. The bus assembly can better withstand forces in multiple directions and has higher structural strength. In addition, compared with the bus composed of braided soft copper wire, the structural strength is higher, and it can be positioned and installed on the motor housing without the aid of a fixed bracket. At the same time, under the premise that the arrangement of the copper bus body of the star-point copper bus remains unchanged, the copper bus bodies of the three-phase copper bus are vertically arranged, and the axial dimension of the motor they occupy is roughly the vertical dimension of a single-phase copper bus, while the copper bus bodies of the three-phase copper bus are horizontally arranged and stacked in sequence vertically, and the axial dimension of the motor they occupy is equal to the thickness of the copper bus bodies of the three-phase copper bus plus the electrical safety gap between the copper bus bodies of each two adjacent phase copper busses. Obviously, the copper bus arrangement method described in the utility model can greatly shorten the size occupied by the bus assembly along the axial direction of the motor, which is beneficial to reducing the overall volume of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a busbar assembly according to an embodiment of the utility model;

[0019] Figure 2 A schematic structural diagram of a busbar assembly from another perspective of an embodiment of the utility model;

[0020] Figure 3 A schematic structural diagram of a busbar assembly from another perspective of an embodiment of the utility model;

[0021] Figure 4 for Figure 3 Partial cross-sectional view along the AA axis;

[0022] Figure 5 This is a schematic diagram of the structure of the busbar assembly of the embodiment of the utility model after removing the injection molded parts;

[0023] Figure 6 It is a structural schematic diagram of another perspective of the busbar assembly of the embodiment of the utility model after removing the injection molded parts;

[0024] Figure 7 This is a schematic structural diagram of a U-phase copper busbar according to an embodiment of the utility model;

[0025] Figure 8 It is a structural schematic diagram of a fixing sleeve according to an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Three-phase copper busbar; 11. U-phase copper busbar; 12. V-phase copper busbar; 13. W-phase copper busbar; 2. Star-point copper busbar; 21. Grabbing hole; 22. Process hole; 3. Injection molded part; 31. Installation cavity; 32. Boss; 321. Reinforcement rib; 33. Weight reduction groove; 4. Temperature detection device; 51. Copper busbar body; 52. Copper busbar pin; 53. Lead terminal; 6. Fixing sleeve; 61. Positioning structure; 611. Limiting boss; 612. Anti-rotation plane structure; 7. Rivet nut. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, it should be noted that in the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "upper", "lower", "front", "back" and other words indicating directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the components and devices referred to must be operated in accordance with the specific directions and specified operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0031] like Figure 5-Figure 6 As shown, a busbar assembly of an embodiment of the utility model comprises a three-phase copper bar 1 and a star-point copper bar 2 respectively extending along the circumferential direction of the motor stator, the three-phase copper bar 1 comprises three phase copper bars, the three phase copper bars and the star-point copper bar 2 all comprise a copper bar body 51, the copper bar body 51 of the star-point copper bar 2 is used to be arranged parallel to the axial end face of the motor stator, and the copper bar bodies 51 of the three phase copper bars are respectively arranged perpendicularly to the plane where the copper bar body 51 of the star-point copper bar 2 is located.

[0032] Specifically, the three-phase copper bar 1 includes three phase copper bars, namely, the U-phase copper bar, the V-phase copper bar, and the W-phase copper bar. The phase copper bar and the star point copper bar 2 can be formed by stamping a flat copper conductor, with a simple production process and low cost. The phase copper bar and the star point copper bar adopt a flat copper conductor with a large thickness, and have a higher structural strength than the soft, slender braided soft copper wire. It should be noted that the copper bar body 51 of the phase copper bar and the star point copper bar are both flat sheet structures. In addition, the phase copper bar and the star point copper bar can also include local bending parts such as pins. In this embodiment, the side with the largest area in the copper bar body 51 is made into a large surface, and each copper bar body 51 has two large surfaces arranged opposite to each other. The copper bar body 51 of the star-point copper bar 2 is arranged parallel to the axial end surface of the motor stator, which means that the large surfaces on the opposite sides of the copper bar body 51 of the star-point copper bar 2 are parallel to the axial end surface of the motor stator; the copper bar bodies 51 of each phase copper bar are respectively arranged perpendicularly to the plane where the copper bar body 51 of the star-point copper bar 2 is located, which means that the large surfaces on the opposite sides of the copper bar body 51 of each phase copper bar are relatively perpendicular to the large surfaces on both sides of the copper bar body 51 of the star-point copper bar 2, or it can be said that the large surfaces on both sides of the copper bar body 51 of each phase copper bar are arranged perpendicular to the axial end surface of the motor stator.

[0033] Taking the axis of the motor stator being arranged along the direction indicated by the Z axis as an example, the busbar assembly can be arranged on the upper side or the lower side of the motor stator. The phase copper bar and the star point copper bar 2 are arc structures or bent structures extending roughly along the circumferential direction of the motor stator. The copper bar body 51 of the flat star point copper bar 2 is placed horizontally, and the thickness direction of the copper bar body 51 of the star point copper bar 2 is the up and down direction, that is, the axial direction indicated by the motor stator. The copper bar bodies 51 of the three phase copper bars can be respectively arranged vertically on the plane where the copper bar body 51 of the star point copper bar 2 is located, that is, the copper bar body 51 of the flat phase copper bar is arranged vertically or placed upright, and the thickness direction of the copper bar body 51 of the phase copper bar is the radial direction indicated by the motor stator, and the width direction of the copper bar body 51 of the phase copper bar is the direction indicated by the Z axis.

[0034] Compared with horizontally arranging the copper bar bodies 51 of the three phase copper bars of the busbar, horizontally arranging the copper bar body 51 of the star point copper bar 2, and stacking the copper bar bodies 51 in sequence vertically, in this embodiment, the copper bar bodies 51 of the three phase copper bars of the busbar assembly are vertically arranged, and the copper bar body 51 of the star point copper bar 2 is horizontally arranged. The copper bar body 51 of the star point copper bar 2 can withstand a large horizontal force, and the copper bar body 51 of the three phase copper bars can withstand a large vertical force, so that the entire busbar assembly can better withstand forces in multiple directions and has a higher structural strength. In addition, compared with the busbar composed of braided soft copper wires, the copper bar structure has a higher strength and does not require the aid of a fixed bracket. The positioning installation on the motor housing can be realized; at the same time, under the premise that the arrangement mode of the copper bar body 51 of the star-point copper bar 2 remains unchanged, the copper bar body 51 of the three-phase copper bar is vertically arranged, and the axial dimension of the motor occupied by it is roughly the dimension of a single phase copper bar along the Z direction, and the copper bar body 51 of the three-phase copper bar is horizontally arranged and stacked in sequence vertically, and the axial dimension of the motor occupied by it is equal to the thickness of the copper bar body 51 of the three-phase copper bar plus the electrical safety gap between the copper bar bodies 51 of each two adjacent phase copper bars. Obviously, the copper bar arrangement mode described in the utility model can greatly shorten the size occupied by the busbar assembly along the axial direction of the motor, which is beneficial to reducing the overall volume of the motor.

[0035] It should be noted that the number of copper bar pins 52 on the star point copper bar 2 is equal to the sum of the number of copper bar pins 52 on the three phase copper bars, that is, the number of copper bar pins 52 on the star point copper bar 2 is much greater than the number of copper bar pins 52 on a single phase copper bar, and the copper bar pins 52 are generally arranged upward to connect with the winding leads extending upward from the motor stator, and the copper bar body 51 of the star point copper bar 2 is placed horizontally, and the copper bar pins 52 of the star point copper bar 2 only need to be bent upward 90° relative to the copper bar body 51, making the molding of multiple copper bar pins 52 on the star point copper bar 2 simpler. The number of copper bar pins 52 on the phase copper bar is relatively small, and even if the copper bar body 51 of the phase copper bar is placed upright, the copper bar pins 52 on it need to be bent 180° relative to the copper bar body 51, which is also easy to achieve.

[0036] like Figure 5 As shown, optionally, the copper bar body 51 of each phase copper bar is arranged vertically, and the copper bar body 51 of the star-point copper bar 2 is arranged horizontally, and the bottom of the phase copper bar is flush with the star-point copper bar 2 or part of the phase copper bar is located below the copper bar body 51 of the star-point copper bar 2.

[0037] In this embodiment, the copper bar body 51 of each phase copper bar and the copper bar body 51 of the star-point copper bar 2 are staggered in the radial direction or the circumferential direction. When the copper bar body 51 of each phase copper bar is vertically arranged and the copper bar body 51 of the star-point copper bar 2 is horizontally arranged, the bottom of each phase copper bar can be flush with the copper bar body 51 of the star-point copper bar 2 or located below the copper bar body 51 of the star-point copper bar 2. The dimension of the entire busbar assembly along the axial direction of the motor stator is roughly the dimension of a single phase copper bar along the Z direction, further shortening the space occupied by the busbar assembly along the axial direction of the motor stator.

[0038] It can be understood that the star point copper bar 2 is arranged horizontally, and the copper bar pin 52 of the star point copper bar 2 is bent 90° relative to its copper bar body 51, that is, one end of the copper bar pin 52 of the star point copper bar 2 is flush with the copper bar body 51 of the star point copper bar 2, and the other end is bent 90° upward, and the copper bar body 51 of the phase copper bar is arranged vertically, and the copper bar pin 52 of the phase copper bar is bent 180° relative to the copper bar body 51 of the phase copper bar, which is roughly U-shaped. Figure 6 , part of the copper bar pin 52 of the phase copper bar is located below the copper bar body 51 of the phase copper bar, so the bottom of the phase copper bar is flush with the copper bar body 51 of the star point copper bar 2 or part of the phase copper bar is located below the copper bar body 51 of the star point copper bar 2 means that the lower end of the copper bar pin 52 of the phase copper bar is flush with the copper bar body 51 of the star point copper bar 2 or is located below the copper bar body 51 of the star point copper bar 2.

[0039] Of course, in some embodiments, the three-phase copper busbar 1 can be located as a whole on one side of the star-point copper busbar 2. In this case, the size of the entire busbar assembly along the axial direction of the motor stator is equal to the size of a single phase copper busbar along the Z direction, the thickness of the copper busbar body 51 of the star-point copper busbar 2, and the sum of the electrical safety gaps between the phase copper busbars and the star-point copper busbar 2.

[0040] like Figure 1-Figure 3 As shown, optionally, the busbar assembly further includes an injection molded part 3, wherein the injection molded part 3 at least partially wraps the three-phase copper busbar 1 and the star-point copper busbar 2, and the injection molded part 3, the three-phase copper busbar 1, and the star-point copper busbar 2 are integrally formed.

[0041] In this embodiment, the three-phase copper bar 1 and the star-point copper bar 2 are injection-molded by injection molding material, and the formed injection-molded part 3 connects the three-phase copper bar 1 and the star-point copper bar 2 together to form a whole with high strength.

[0042] The injection molded part 3 is a plastic part, and the injection molded part 3 can completely wrap the three-phase copper bar 1 and the star point copper bar 2 to achieve insulation protection for the three-phase copper bar 1 and the star point copper bar 2, avoid short circuit caused by contact between the three-phase copper bar 1 and the star point copper bar 2 and the motor housing, and improve circuit stability.

[0043] In some embodiments, while ensuring that there is a sufficient safety gap between the three-phase copper bar 1, the star point copper bar 2 and the motor housing, part of the three-phase copper bar 1 and the star point copper bar 2 may not be wrapped by the injection molded part 3, that is, the injection molded part 3 partially wraps the three-phase copper bar 1 and the star point copper bar 2. For example, Figure 1-Figure 3 As shown, part of the star-point copper bar 2 is exposed outside the injection molded part 3 .

[0044] The injection molded part 3 extends roughly along the circumference of the motor stator, and the outer edge of the injection molded part 3 does not exceed the outer edge of the motor stator, so that after the bus assembly is assembled with the motor stator, the two can be inserted into the motor housing together, thereby achieving smooth assembly between the motor stator, the bus assembly and the motor housing.

[0045] The injection molded part 3 may be provided with a weight-reducing groove 33 to reduce the material usage and reduce the overall weight of the busbar assembly. The star copper busbar 2 may be provided with a grasping hole 21 to facilitate the robot to grasp the busbar assembly.

[0046] like Figure 3-Figure 4 As shown, optionally, the busbar assembly further includes a temperature detection device 4 , the injection molded part 3 is provided with a mounting cavity 31 which exposes a portion of the copper busbar body 51 , and the temperature detection device 4 is placed in the mounting cavity 31 and in contact with the exposed copper busbar body 51 .

[0047] Specifically, an installation cavity 31 with an upward opening can be set at a position on the injection molded part 3 corresponding to the phase copper bar or the star point copper bar 2. The installation cavity 31 can be directly formed when each copper bar is injection molded, or it can be formed by excavation after injection molding. Part of the phase copper bar or the star point copper bar is exposed in the installation cavity 31. The temperature detection device 4 can be installed in the installation cavity 31 by snap-fitting and in contact with the copper bar body 51 of the corresponding phase copper bar or the copper bar body 51 of the star point copper bar 2. Compared with the method of fixing the temperature detection device on the bus assembly by means of heat sleeve or binding, the installation method described in this embodiment is simpler and faster, and will not cause aging and falling off problems.

[0048] Here, the temperature detection device 4 can be a temperature sensor, which has a temperature measuring probe and a connecting line. The temperature measuring probe is connected to the display device through the connecting line. The temperature data detected by the temperature measuring probe can be displayed through the display device so that corresponding measures can be taken.

[0049] The injection molded part 3 may be provided with a wire fixing portion, such as a wire fixing groove, and the connecting wire of the temperature probe may be fixed through the wire fixing portion to prevent the temperature probe from being pulled out of the installation cavity 31 due to shaking and pulling. The star point copper bus 2 is also provided with a process hole 22. After the busbar assembly and the motor stator are assembled, when they are inserted into the motor housing together, the connecting wire of the temperature sensor can be fixed at the process hole 22 through a tool to prevent the connecting wire of the temperature sensor from being pulled and shaken. After being assembled into the motor housing, the fixing is released.

[0050] like Figure 5 and Figure 7 As shown, optionally, each of the phase copper bars and the star point copper bar 2 further includes a copper bar pin 52, the copper bar pin 52 is located on the side of the copper bar body 51 facing inward along the radial direction of the motor stator and is used to connect with the stator winding, the copper bar pin 52 of each phase copper bar is bent 180° relative to the copper bar body 51, and the temperature detection device 4 is arranged close to the corresponding copper bar pin 52.

[0051] Specifically, the copper bar body 51 may be an arc-shaped structure extending roughly along the circumference of the motor stator, and the multiple copper bar pins 52 arranged on the same copper bar body 51 are all located on the inner side of the arc of the copper bar body 51, and are arranged at intervals along the extension direction of the copper bar body 51; for example, the inner side of the copper bar body 51 of each phase copper bar may have two copper bar pins 52 bent upward, and the inner side of the copper bar body 51 of the star point copper bar 2 may have six copper bar pins 52 bent upward, and the stator winding has twelve winding leads, six of which are respectively connected to the six copper bar pins 52 of the star point copper bar 2, and the other six are connected to the copper bar pins 52 of the three phase copper bars, so as to realize the connection between the stator winding and the busbar assembly. It should be noted that the copper bar pins 52 of each phase copper bar and the star point copper bar 2 extend along the radial direction of the motor stator to fit and connect with the leads extending from the winding. When the motor stator is arranged vertically, the copper bar body 51 of the star point copper bar 2 is arranged horizontally, and the copper bar body 51 of the phase copper bar is arranged vertically. The copper bar pins 52 of the phase copper bar are bent 180° relative to the copper bar body 51, and the copper bar pins 52 of the star point copper bar 2 are bent 90° relative to the copper bar body 51, which can ensure that the copper bar pins 52 of the phase copper bar and the copper bar pins of the star point copper bar are arranged upward after bending, which is more convenient for connection with the winding leads.

[0052] The three phase copper bars and the star point copper bar 2 are provided with a total of a plurality of copper bar pins, and the temperature detection device 4 can be arranged close to any copper bar pin 52. When the temperature detection device 4 is arranged close to a copper bar pin 52, the temperature detection device 4 fits the copper bar body 51 of the copper bar corresponding to the copper bar pin 52. In addition, since the plurality of copper bar pins 52 on the same copper bar body 51 are arranged at intervals along the extension direction of the copper bar body 51, in this embodiment, the temperature detection device 4 is arranged close to the corresponding copper bar pin 52, which means that the temperature detection device 4 is located at a position close to a copper bar pin 52 in the extension direction of the copper bar body 51. In addition, since the copper bar body 51 of the phase copper bar is arranged vertically, if the temperature detection device 4 is arranged on the phase copper bar, the temperature detection device 4 can be located on the side of the copper bar body 51 facing the inside, that is, on the side of the copper bar body 51 connected to the copper bar pin 52.

[0053] In this embodiment, when the motor is working, the heat generated at the connection between the winding lead and the bus assembly is relatively sensitive. By providing an installation cavity 31 near the copper bus pin 52 and installing a temperature detection device 4, the motor temperature can be measured more accurately and sensitively.

[0054] like Figure 1 , Figure 2 and Figure 7 As shown, optionally, each of the phase copper bars further includes a lead terminal 53, and the copper bar pin 52 of the phase copper bar is arranged at one end of the copper bar body 51 along the circumference of the motor stator, and the end of the copper bar body 51 of the phase copper bar away from the copper bar pin 52 is bent toward the inner direction close to the motor stator and connected to the lead terminal 53 so that the lead terminal 53 does not exceed the circumferential outer edge of the motor stator.

[0055] Specifically, the copper bar body 51 of the phase copper bar is provided with copper bar pins 52 and lead terminals 53 at both ends, the copper bar body 51, the copper bar pins 52 and the lead terminals 53 can be integrally formed, and the phase copper bar can be connected to the external controller through the lead terminals 53. The star point copper bar 2 only includes the copper bar body 51 and the copper bar pins 52, and the copper bar pins 52 of the star point copper bar 2 are evenly spaced along the circumference of the copper bar body 51. The lead terminals 53 can be a "7"-shaped structure, the vertical part of the "7"-shaped structure is connected to the copper bar body 51 of the phase copper bar, and the horizontal part of the "7"-shaped structure is extended from the inside to the outside along the radial direction of the motor stator to connect with the controller copper bar.

[0056] In this embodiment, by bending one end of the copper bar body 51 of the phase copper bar away from the copper bar pin 52 toward the inside of the motor stator, the lead terminal 53 will not exceed the outer edge of the motor stator, ensuring that the motor stator and the bus assembly can be smoothly installed in the motor housing without interfering with the motor housing.

[0057] Optionally, the three-phase copper bar 1 includes a U-phase copper bar 11, a V-phase copper bar 12 and a W-phase copper bar 13 which are arranged in sequence from the inside to the outside along the radial direction of the motor stator, and the U-phase copper bar 11, the V-phase copper bar 12 and the W-phase copper bar are staggered along the circumferential direction of the motor stator. The star-point copper bar 2 is located at one end of the V-phase copper bar 12 where the copper bar pin 52 is provided along the circumferential direction of the motor stator, and the temperature detection device 4 is provided between the V-phase copper bar 12 and the U-phase copper bar 11.

[0058] Specifically, the three-phase copper bar 1 is arranged in sequence from the inside to the outside of the motor stator in the order of U-phase copper bar 11, V-phase copper bar 12 and W-phase copper bar 13, which refers to the arrangement of the copper bar body 51 of each phase copper bar, and the copper bar pins 52 of each phase copper bar extend along the radial direction of the motor stator, which can facilitate the connection between the bus assembly and the stator winding. The number of slots spanned by each phase copper bar along the circumferential direction of the motor stator is equal, such as Figure 5 As shown, the copper bar pin 52 of the V-phase copper bar is located between the copper bar pin 52 of the U-phase copper bar and the lead terminal 53 of the U-phase copper bar, and the copper bar pin 52 of the W-phase copper bar is located between the copper bar pin 52 of the V-phase copper bar 12 and the lead terminal 53 of the V-phase copper bar, thereby realizing the staggered arrangement of the U-phase copper bar 11, the V-phase copper bar 12 and the W-phase copper bar 13 along the circumferential direction of the motor stator, and the copper bars of each phase can be arranged as compactly as possible, which is beneficial to reducing the overall volume of the busbar assembly.

[0059] The star point copper bar 2 may be located at one end of the V-phase copper bar 12 along the circumferential direction of the motor stator, and the copper bar body 51 of the star point copper bar 2 is located at a side of the U-phase copper bar 11 facing outward along the radial direction of the motor stator.

[0060] like Figure 5 As shown, one end of the copper bar body 51 of the V-phase copper bar 12 away from the lead terminal 53 can be bent toward the outside of the motor stator to form a larger space between the copper bar body 51 of the U-phase copper bar 11 to facilitate the installation of the temperature detection device 4. The temperature detection device 4 can be attached to the side of the copper bar body 51 of the V-phase copper bar 12 facing the copper bar body 51 of the U-phase copper bar 11, and the temperature detection device 4 is arranged close to the copper bar pin 52 of the V-phase copper bar 12, so that the temperature detection device 4 can more accurately detect the temperature of the copper bar pin 52 of the V-phase copper bar 12.

[0061] like Figure 1-Figure 3 and Figure 8 As shown, optionally, the busbar assembly also includes a fixing sleeve 6, the strength of the fixing sleeve 6 is greater than the strength of the injection molded part 3, the injection molded part 3 is provided with a boss 32 on one side radially facing the inside of the motor stator, the fixing sleeve 6 is provided with a positioning structure 61, the positioning structure 61 includes limiting bosses 611 arranged at both axial ends of the fixing sleeve 6 and an anti-rotation plane structure 612 arranged on the circumferential side wall of the fixing sleeve 6, the fixing sleeve 6 is installed on the boss 32 through the limiting boss 611 and the anti-rotation plane structure 612, and the injection molded part 3 is used to be fixed to the motor housing through the fixing sleeve 6.

[0062] Specifically, the fixing sleeve 6 can be made of a material with high strength, such as a metal material, and has high strength. Two or more fixing sleeves 6 can be provided, and the fixing sleeve 6 is integrally injection molded with the three-phase copper bar 1 and the star point copper bar 2. The injection molded part 3 is provided with two bosses 32 on one side facing the inside of the motor stator in the radial direction, and the bosses 32 will not exceed the outer edge of the motor stator, and will not interfere with the side wall of the motor housing when entering the motor housing.

[0063] The two bosses 32 can be respectively close to the lead terminal 53 of the U-phase copper busbar 11 and the lead terminal 53 of the W-phase copper busbar 13. The boss 32 is provided with a through hole penetrating along the Z direction, and the fixing sleeve 6 is assembled in the through hole; the boss 32 can be provided with a reinforcing rib 321 to improve the strength of the boss 32 so that the fixing sleeve 6 can be stably fixed to the boss 32.

[0064] A limiting boss 611 is respectively provided at both axial ends of the fixing sleeve 6 to form an axial anti-slip structure to limit the fixing sleeve 6 from axially detaching from the injection molded part 3. An anti-rotation plane structure 612 is provided on the circumferential side wall of the fixing sleeve 6 to form a circumferential anti-rotation structure to limit the rotation of the fixing sleeve 6, so that the fixing sleeve 6 can be stably installed on the boss 32 of the injection molded part 3.

[0065] In this embodiment, a connection hole is provided on the motor housing at a position corresponding to the fixing sleeve 6, and a fastener passes through the connection hole and the fixing sleeve 6 to realize the fixed assembly of the busbar assembly and the motor housing, and the installation method is simple. In addition, the fixing sleeve 6 is stronger than the injection molded part 3, and can ensure the installation stability of the busbar assembly.

[0066] Optionally, the busbar assembly further includes a rivet nut 7 , which is embedded in the lead terminal 53 , and the lead terminal 53 is used to be connected to the copper busbar of the controller through the rivet nut 7 .

[0067] Compared with only providing a fixing hole on the lead terminal 53, after the bolt passes through the fixing hole of the lead terminal 53 and the copper busbar of the controller from top to bottom, it is necessary to screw the nut on the back, and there needs to be enough space under the lead terminal 53. In this embodiment, by embedding the rivet nut 7 in the fixing hole of the lead terminal 53, the bolt passes through the rivet nut 7 on the lead terminal 53 and the copper busbar of the controller from top to bottom, so that the connection between the lead terminal 53 and the copper busbar of the controller can be achieved without screwing the bolt, and the connection is convenient and reliable.

[0068] Another embodiment of the utility model provides a motor, including the above-mentioned busbar assembly. The motor can be a flat wire motor. The advantages of the motor compared to the prior art are the same as those of the above-mentioned busbar assembly, and will not be repeated.

[0069] Another embodiment of the present invention provides a car, comprising the above motor. The car may be a new energy car. The advantages of the car compared to the prior art are the same as those of the above motor, and will not be described again.

[0070] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A busbar assembly, characterized in that: The invention comprises a three-phase copper bar (1) and a star point copper bar (2) respectively extending along the circumferential direction of the motor stator, wherein the three-phase copper bar (1) comprises three phase copper bars, and the three phase copper bars and the star point copper bar (2) all comprise a copper bar body (51), and the copper bar body (51) of the star point copper bar (2) is used to be arranged parallel to the axial end face of the motor stator, and the copper bar bodies (51) of the three phase copper bars are respectively arranged perpendicularly relative to the plane where the copper bar body (51) of the star point copper bar (2) is located.

2. The busbar assembly according to claim 1, characterized in that: The copper bar body (51) of each phase copper bar is arranged vertically, and the copper bar body (51) of the star point copper bar (2) is arranged horizontally, and the bottom of the phase copper bar is flush with the copper bar body (51) of the star point copper bar (2) or part of the phase copper bar is located below the copper bar body (51) of the star point copper bar (2).

3. The busbar assembly according to claim 1, characterized in that: It also includes an injection molded part (3), wherein the injection molded part (3) at least partially wraps the three-phase copper busbar (1) and the star-point copper busbar (2), and the injection molded part (3) is integrally formed with the three-phase copper busbar (1) and the star-point copper busbar (2).

4. The busbar assembly according to claim 3, characterized in that: It also comprises a temperature detection device (4); the injection molded part (3) is provided with a mounting cavity (31) which exposes a portion of the copper busbar body (51); the temperature detection device (4) is placed in the mounting cavity (31) and in contact with the exposed copper busbar body (51).

5. The busbar assembly according to claim 4, characterized in that: Each of the phase copper bars and the star point copper bar (2) further comprises a copper bar pin (52), the copper bar pin (52) being located on a side of the copper bar body (51) facing inward along the radial direction of the motor stator and being used for connecting with the stator winding, the copper bar pin (52) of each phase copper bar being bent 180° relative to the copper bar body (51), and the temperature detection device (4) being arranged close to the corresponding copper bar pin (52).

6. The busbar assembly according to claim 5, characterized in that: Each of the phase copper bars further comprises a lead terminal (53), the copper bar pin (52) of the phase copper bar being arranged at one end of the copper bar body (51) along the circumference of the motor stator, and one end of the copper bar body (51) of the phase copper bar away from the copper bar pin (52) being bent toward the inner direction close to the motor stator and connected to the lead terminal (53) so that the lead terminal (53) does not exceed the circumferential outer edge of the motor stator.

7. The busbar assembly according to claim 6, characterized in that: The three-phase copper bar (1) comprises a U-phase copper bar (11), a V-phase copper bar (12) and a W-phase copper bar (13) which are arranged in sequence from the inside to the outside along the radial direction of the motor stator; the U-phase copper bar (11), the V-phase copper bar (12) and the W-phase copper bar (13) are arranged in a staggered manner along the circumferential direction of the motor stator; the star point copper bar (2) is located at one end of the V-phase copper bar (12) where the copper bar pin (52) is arranged along the circumferential direction of the motor stator; and the temperature detection device (4) is arranged between the V-phase copper bar (12) and the U-phase copper bar (11).

8. The busbar assembly according to claim 6, characterized in that: It also includes a fixing sleeve (6), the strength of the fixing sleeve (6) is greater than the strength of the injection molded part (3), a boss (32) is provided on one side of the injection molded part (3) radially facing the inside of the motor stator, a positioning structure (61) is provided on the fixing sleeve (6), the positioning structure (61) includes limiting bosses (611) arranged at both axial ends of the fixing sleeve (6) and an anti-rotation plane structure (612) arranged on the circumferential side wall of the fixing sleeve (6), the fixing sleeve (6) is embedded in the boss (32) through the limiting boss (611) and the anti-rotation plane structure (612), and the injection molded part (3) is used to be fixed to the motor housing through the fixing sleeve (6); And / or, it also includes a rivet nut (7), wherein the rivet nut (7) is embedded in the lead terminal (53), and the lead terminal (53) is used to connect to the copper busbar of the controller through the rivet nut (7).

9. A motor, characterized in that: Comprising the busbar assembly as described in any one of claims 1-8.

10. An automobile, characterized in that: Comprising the motor as claimed in claim 9.

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