Three-phase copper bar, electric drive assembly and vehicle

Abstract

The application discloses a three-phase copper bar, an electric drive assembly and a vehicle. The three-phase copper bar comprises a mounting seat and three copper bars mounted in the mounting seat. Each copper bar comprises a first end connecting section, a middle connecting section and a second end connecting section which are sequentially connected and arranged at an angle. The middle connecting section of one copper bar is located on a first side of the first end connecting section, and the middle connecting sections of the remaining two copper bars are located on a second side of the first end connecting section. The first side and the second side are opposite sides. The three-phase copper bar disclosed by the application is configured to have a bending angle, and the middle connecting sections of some copper bars are located on different sides (opposite sides) of the first end connecting section. The three copper bars are staggered in space. The "staggered" layout makes the copper bar assembly more compact in the premise of meeting the electrical clearance requirement, effectively reduces the occupied space of the copper bar assembly, and is beneficial to the miniaturization design of the electric drive system.

Description

Technical Field

[0001] This application belongs to the field of electric drive technology, specifically relating to a three-phase copper busbar, an electric drive assembly, and a vehicle. Background Technology

[0002] With the rapid development of the new energy vehicle industry, permanent magnet synchronous motors are being used more and more widely in the field of new energy vehicles. The connection between the permanent magnet synchronous motor and the controller is achieved through three copper busbars.

[0003] Although the three copper busbars of the existing motor terminal block are injection molded into a whole using plastic injection molding, the three-phase copper busbars UVW need to be reserved with a safety distance in sequence, and are basically arranged in order, resulting in a large space occupied and difficulty in sealing. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application discloses a three-phase copper busbar, an electric drive assembly, and a vehicle.

[0005] The technical solution adopted to achieve the purpose of this application is as follows: In the first aspect of this application, the present invention discloses a three-phase copper busbar, including a mounting base and three copper busbars installed in the mounting base. Each copper busbar includes a first end connecting section, a middle connecting section and a second end connecting section that are connected in sequence and arranged at an angle to each other; the middle connecting section of one copper busbar is located on the first side of the first end connecting section, and the middle connecting sections of the remaining two copper busbars are located on the second side of the first end connecting section, with the first side and the second side being opposite sides.

[0006] According to one embodiment of the present invention, the two middle connecting sections located on the second side are coplanar; the middle connecting section of the middle copper busbar is located inside the middle connecting section of the other copper busbar.

[0007] According to one embodiment of the present invention, both of the middle connecting segments located on the second side are L-shaped.

[0008] According to one embodiment of the present invention, the first end connecting segment and the second end connecting segment are disposed opposite to each other on the third and fourth sides of the middle connecting segment; and / or the three first end connecting segments are parallel and coplanar, and the three second end connecting segments are parallel and coplanar.

[0009] According to one embodiment of the present invention, the mounting base is provided with a mounting cavity and two openings; the middle connecting section is located inside the mounting cavity, and the first end connecting section and the second end connecting section extend outwards through the two openings respectively.

[0010] According to one embodiment of the present invention, the mounting base includes a mounting plate and two protective frames, the mounting cavity is located on the mounting plate, and the two openings are respectively located in the two protective frames.

[0011] According to one embodiment of the present invention, two baffles are provided on the protective frame, the baffles being located between two adjacent first end connecting segments and between two adjacent second end connecting segments.

[0012] According to one embodiment of the present invention, the mounting base is provided with a sealing ring at both of the openings, one of the mounting base and the sealing ring is provided with a protrusion, and the other is provided with a groove, wherein the protrusion is embedded in the groove.

[0013] The technical solution adopted to achieve the purpose of this application is as follows: In the second aspect of this application, the present invention also discloses an electric drive assembly, which includes a motor, a controller and the three-phase copper busbar described in the first aspect above, wherein the motor and the controller are electrically connected through the three-phase copper busbar.

[0014] The technical solution adopted to achieve the purpose of this application is as follows: In the third aspect of this application, the present invention also discloses a vehicle, which includes the electric drive assembly described in the second aspect above.

[0015] As can be seen from the above technical solution, the three-phase copper busbar disclosed in this application includes a mounting base and three copper busbars installed in the mounting base. Each copper busbar includes a first end connecting section, a middle connecting section and a second end connecting section that are connected in sequence and arranged at an angle to each other. The middle connecting section of one copper busbar is located on the first side of the first end connecting section, and the middle connecting sections of the remaining two copper busbars are located on the second side of the first end connecting section. The first side and the second side are opposite sides.

[0016] The three-phase copper busbar disclosed in this application is constructed with three copper busbars having a bending angle, and the middle connecting sections of some copper busbars are located on different sides (opposite sides) of the first end connecting section, so that the three copper busbars are arranged in an interlaced manner in space. This "interlaced" layout makes the overall structure of the copper busbar assembly more compact while meeting the electrical clearance requirements, effectively reducing the space occupied by the copper busbar assembly, which is beneficial to the miniaturization design of electric drive systems. Attached Figure Description

[0017] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Figure 1 This is a schematic diagram of a three-phase copper busbar in one or more embodiments of this application; Figure 2 for Figure 1 A top view of the three-phase copper busbar; Figure 3 for Figure 1 A bottom-view diagram of the three-phase copper busbar; Figure 4 for Figure 1 A schematic diagram of the copper busbar.

[0019] Explanation of reference numerals in the attached drawings: 100, mounting base; 110, mounting plate; 111, protrusion; 112, anti-misalignment groove; 120, protective frame; 121, stop bar; 200, copper busbar; 210, first end connecting section; 220, middle connecting section; 230, second end connecting section; 300, sealing ring; 310, slot. Detailed Implementation

[0020] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0023] This invention discloses a three-phase copper busbar, an electric drive assembly, and a vehicle, which can solve the technical problem of large space occupation of three-phase copper busbars in the prior art.

[0024] The technical solutions of this application will be described in detail below through specific embodiments and in conjunction with the accompanying drawings, which are not necessarily drawn to scale. Similar or identical reference numerals may be used to designate the same or similar parts in different figures. The use of similar or identical reference numerals in different figures does not mean that all figures including similar or identical reference numerals constitute a single or the same embodiment. The accompanying drawings illustrate the various embodiments discussed in this application in a generalized manner, by way of example and not limitation.

[0025] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In the first aspect of this application, a three-phase copper busbar is disclosed, which includes a mounting base 100 and three copper busbars 200 mounted in the mounting base 100. Each copper busbar 200 includes a first end connecting section 210, a middle connecting section 220 and a second end connecting section 230 connected in sequence and arranged at an angle to each other. The middle connecting section 220 of one copper busbar 200 is located on the first side of the first end connecting section 210, and the middle connecting sections 220 of the remaining two copper busbars 200 are located on the second side of the first end connecting section 210. The first side and the second side are opposite sides.

[0026] Each copper busbar 200 is a bent conductive busbar. Its first end connection section 210 is used to electrically connect with the three-phase lead-out terminal of the motor, the second end connection section 230 is used to electrically connect with the three-phase input terminal of the controller, and the middle connection section 220 serves as a transition connection between the two ends and plays a role in spatial layout adjustment.

[0027] See Figure 4 In this embodiment, the left side of the first end connecting segment 210 in the figure is designated as the first side, and the right side of the first end connecting segment 210 in the figure is designated as the second side. In other embodiments, the first side and the second side can be determined according to the placement position and angle of the copper busbar 200.

[0028] The three-phase copper busbar disclosed in this embodiment is constructed with three copper busbars 200 having a bending angle, and the middle connecting section 220 of some copper busbars 200 is located on different sides (opposite sides) of the first end connecting section 210, so that the three copper busbars 200 are arranged in an interlaced manner in space. This "interlaced" layout makes the overall structure of the copper busbar 200 assembly more compact while meeting the electrical clearance requirements, effectively reducing the space occupied by the copper busbar 200 assembly, which is beneficial to the miniaturization design of the electric drive system.

[0029] In one embodiment, the two intermediate connecting segments 220 located on the second side are coplanar. The intermediate connecting segment of the middle copper busbar 200 is located inside the intermediate connecting segment of the other copper busbar 200.

[0030] By setting the two middle connecting sections 220 located on the second side to be coplanar, the middle connecting sections 220 of the two copper busbars 200 are in the same plane in space.

[0031] In one embodiment, the middle connecting sections 220 of the three copper busbars 200 are all coplanar, which makes the arrangement of the copper busbars 200 more regular, thus facilitating processing and installation.

[0032] The mounting cavity of the mounting base 100 needs to accommodate the central connecting sections 220 of the three copper busbars 200. If the three central connecting sections 220 are not coplanar but distributed at different height levels, the mounting cavity needs a larger dimension in the direction perpendicular to the plane where the central connecting sections 220 are located to accommodate these different levels of bent sections, resulting in an increase in the thickness of the mounting base 100. When the three central connecting sections 220 are all coplanar, the mounting cavity only needs to accommodate the middle part of the three copper busbars 200 in one plane, and only the thickness of one copper busbar 200 plus the insulation layer needs to be reserved in the thickness direction, without the need for multiple layers of stacked space. This minimizes the thickness of the mounting base 100, thereby reducing the space occupied by the three-phase copper busbar assembly in the axial direction of the electric drive assembly.

[0033] In one embodiment, nuts are welded to the first end connection section 210 and the second end connection section 230 of each copper busbar 200. By setting the welded nuts, the connection between the copper busbar 200 and the motor and the controller can be made more convenient.

[0034] Meanwhile, the middle connecting section 220 of the copper busbar 200 located in the middle is set on the inner side (that is, the side closer to the first end connecting section 210), and the middle connecting section 220 of the other copper busbar 200 is set on the outer side. The two are further staggered on the basis of being coplanar, which not only ensures the safe distance between them, but also makes the overall structure more compact and orderly.

[0035] This application achieves a compact layout while fully considering high-voltage electrical safety requirements. The two central connecting sections 220 on the second side are arranged coplanarly and staggered, allowing for precise control of the spacing between the second and third copper busbars 200. Simultaneously, baffles 121 are installed between adjacent end connecting sections on the protective frame 120, effectively increasing the creepage distance between adjacent copper busbars 200. These designs ensure that, while reducing size, the phase-to-phase insulation performance fully meets the requirements of high-voltage electrical safety standards.

[0036] In one embodiment, both middle connecting segments 220 located on the second side are L-shaped.

[0037] The middle connecting section 220 is set as L-shaped, so that the copper busbar 200 can achieve spatial reversal with a small radius of curvature after bending, which is convenient for flexible wiring in a limited space. At the same time, the L-shaped structure is conducive to avoiding and positioning other structural components (such as the cavity wall of the mounting base 100).

[0038] In one embodiment, the first end connecting segment 210 and the second end connecting segment 230 are disposed opposite to each other on the third and fourth sides of the middle connecting segment 220.

[0039] By placing the first end connecting section 210 and the second end connecting section 230 opposite each other on both sides of the middle connecting section 220, the copper busbar 200 presents a bent shape, which facilitates the electrical connection between the motor side and the controller side at different spatial positions.

[0040] See Figure 4 In this embodiment, the upper side of the central connecting segment 220 in the figure is designated as the third side, and the lower side of the central connecting segment 220 in the figure is designated as the fourth side. In other embodiments, the third and fourth sides can be determined based on the placement and angle of the copper busbar 200.

[0041] In one embodiment, the three first end connecting segments 210 are parallel and coplanar, and the three second end connecting segments 230 are parallel and coplanar.

[0042] The three first end connection sections 210 are parallel and coplanar, ensuring that the connection end faces are consistent with the three-phase lead-out terminals of the motor; the three second end connection sections 230 are parallel and coplanar, ensuring that the connection end faces are consistent with the three-phase input terminals of the controller, thereby improving the convenience and reliability of the connection.

[0043] The three first end connection sections 210 are parallel and coplanar, and the three second end connection sections 230 are parallel and coplanar, so that the three-phase copper busbar forms a neat and uniform connection end face on both the motor side and the controller side. In actual assembly, the three-phase lead-out / input terminals of the motor and controller can be designed as three parallel terminals on the same plane, which are connected one-to-one with the ends of the copper busbar 200, facilitating automated assembly and tightening operations, and improving production efficiency and connection reliability.

[0044] In one embodiment, the plane containing the three first end connecting segments 210 (hereinafter referred to as the "first plane") is perpendicular to the plane containing the three middle connecting segments 220 (hereinafter referred to as the "second plane"), the plane containing the three second end connecting segments 230 (hereinafter referred to as the "third plane") is perpendicular to the plane containing the three middle connecting segments 220, and the plane containing the three first end connecting segments 210 is perpendicular to the plane containing the three second end connecting segments 230.

[0045] After extending from the motor connection end, the copper busbar 200 makes a 90° right-angle bend into the central area; similarly, it makes another 90° right-angle bend from the central area into the controller connection end. This layout allows the three-phase copper busbars to achieve three-dimensional routing between the motor and the controller, rather than being limited to two-dimensional routing within a single plane. In traditional sequential arrangement schemes, the three copper busbars 200 are basically in the same plane, with a single routing direction, and the width dimension is magnified many times by safety distance requirements. However, this application guides the two ends of the copper busbar 200 to two mutually perpendicular planes, so that the copper busbar group 200 has a reasonable spatial distribution in the X, Y, and Z directions. This is equivalent to dispersing the volume requirements originally concentrated in a two-dimensional plane into three-dimensional space, thereby effectively reducing the projected size in any single direction.

[0046] Since the three sets of planes are perpendicular to each other, the shortest distance between adjacent copper busbars 200 is no longer the linear distance within the same plane, but a straight-line distance in space. Under the premise of meeting the same electrical safety distance (creepage distance, clearance), the copper busbars 200 can be arranged more closely; or, under the same arrangement density, the safety margin is greater and the insulation reliability is higher.

[0047] In the electric drive assembly of new energy vehicles, the motor and controller are usually arranged in series axially or in parallel radially. When the motor and controller adopt a vertical lead-out design (i.e., the three-phase lead-out end face of the motor is perpendicular to the three-phase input terminal face of the controller), the existing planar copper busbar 200 often needs to be converted in direction through an additional adapter structure (such as adapter copper busbar 200 or flexible connection), which increases the number of parts and contact resistance.

[0048] The technical solution of this application sets the first and third planes to be perpendicular to each other, so that the two ends of the copper busbar 200 inherently have a 90° torsional relationship. This means that when the first end connection section 210 is connected to the three-phase lead-out terminal of the motor, the second end connection section 230 can naturally connect to the vertical input terminal on the controller side without the need for additional adapter components. This reduces the number of connection points (reducing contact resistance and the risk of heat generation), simplifies the assembly process, and improves the reliability and conductivity of the electrical connection.

[0049] In one embodiment, the mounting base 100 has a mounting cavity and two openings. The middle connecting section 220 is located inside the mounting cavity, and the first end connecting section 210 and the second end connecting section 230 extend outwards through the two openings, respectively.

[0050] The mounting base 100 has a mounting cavity to accommodate the middle connecting sections 220 of the three copper busbars 200, providing insulation protection and fixation for the middle part of the copper busbars 200. Two openings allow the first end connecting section 210 and the second end connecting section 230 to extend, respectively, enabling electrical connections between the two ends of the copper busbars 200 and the motor and controller, respectively. This structure ensures both insulation isolation in the middle of the copper busbars 200 and connectivity at the ends.

[0051] In one embodiment, the mounting base 100 includes a mounting plate 110 and two protective frames 120, with the mounting cavity located on the mounting plate 110 and two openings located on the two protective frames 120 respectively.

[0052] The mounting base 100 is configured as a combination structure of mounting plate 110 and two protective frames 120. Mounting plate 110 is used to fix the middle connecting section 220 of the three copper busbars 200 and realize the overall installation. The two protective frames 120 respectively enclose the protruding first end connecting section 210 and second end connecting section 230, which play the role of insulation protection and guiding positioning, and also facilitate the sealing treatment respectively.

[0053] Mounting base 100 secures the central connecting sections 220 of the three copper busbars 200 to mounting plate 110, and two protective frames 120 respectively protect the protruding portions at both ends, forming an integrated insulating mounting module. The three copper busbars 200 are isolated from each other inside mounting base 100 by injection molding material or insulating partitions, and their external protruding portions are surrounded by protective frames 120. The entire copper busbar group 200, except for the connection holes at both ends, is covered with insulating material, effectively preventing the risk of short circuits caused by accidental contact.

[0054] In one embodiment, two baffles 121 are provided on the protective frame 120, with the baffles 121 located between two adjacent first end connecting segments 210 and between two adjacent second end connecting segments 230, respectively.

[0055] By setting a baffle 121 on the protective frame 120 and arranging the baffle 121 between two adjacent first end connection sections 210 and two adjacent second end connection sections 230, the baffle 121 can effectively increase the creepage distance and electrical clearance between the ends of adjacent copper busbars 200, further improving insulation safety in a limited space.

[0056] In one embodiment, the mounting base 100 is provided with a sealing ring 300 at both openings. One of the mounting base 100 and the sealing ring 300 is provided with a protrusion 111, and the other is provided with a slot 310, with the protrusion 111 embedded in the slot 310.

[0057] Alternatively, a protrusion 111 can be provided on the mounting base 100 and a groove 310 can be provided on the sealing ring 300, or a groove 310 can be provided on the mounting base 100 and a protrusion 111 can be provided on the sealing ring 300.

[0058] By accommodating the central connecting section 220 of the three copper busbars 200 within the mounting cavity of the mounting base 100, and by providing sealing rings 300 at the two openings of the mounting base 100, the connection between the copper busbar 200 assembly and the motor and controller can be effectively sealed. Compared to the sealing difficulties caused by the sequential arrangement of the copper busbars 200 in the prior art, the structure of this application is more conducive to the arrangement of the sealing rings 300, thereby improving sealing reliability and protection level.

[0059] Sealing rings 300 are installed at the two openings of the mounting base 100. When the three-phase copper busbar is installed between the motor and the controller, the sealing rings 300 can seal the mating interface between the mounting base 100 and the motor housing and controller housing, preventing external moisture, dust and other contaminants from entering. Through the embedded engagement of the protrusion 111 and the slot 310, the sealing rings 300 can be reliably fixed on the mounting base 100, avoiding the risk of the sealing rings 300 falling off or shifting during assembly or use, and ensuring long-term sealing reliability.

[0060] Because the overall width and projected area of ​​the three-phase copper busbar are significantly reduced, the circumferential outer contour dimension of the mounting base 100 is also reduced. This shortens the perimeter of the sealing interface between the mounting base 100 and the motor housing and controller housing, reducing the sealing area. With the same sealing structure, a smaller sealing interface results in a lower risk of seal failure. Furthermore, this application provides sealing rings 300 at both openings of the mounting base 100, which are embedded in the slots 310 via protrusions 111. The sealing rings 300 are reliably fixed and not easily detached, further improving the long-term reliability of the seal and effectively preventing moisture and dust from entering the connection area, thus ensuring the safety of the high-voltage electrical connection.

[0061] In one embodiment, grooves 310 are provided on both the inner and outer sides of the sealing ring 300, and correspondingly, multiple protrusions 111 are provided on the mounting base 100 on both sides of the sealing ring 300.

[0062] On the one hand, the cooperation of multiple protrusions 111 and multiple slots 310 can make the installation of the sealing ring 300 more secure; on the other hand, the protrusions 111 respectively set on the inner and outer sides of the sealing ring 300 can constrain the shape of the sealing ring 300, thereby improving the sealing performance.

[0063] In one embodiment, a mis-proof groove 112 is also provided on the mounting base 100. The mis-proof groove 112 is used to indicate the orientation of the mounting base 100, thereby preventing employees from making mistakes such as reversing the orientation during installation.

[0064] Through the above embodiments, this application has the following beneficial effects or advantages: The three-phase copper busbar disclosed in this application optimizes the spatial layout of the three copper busbars 200. Although each of the three copper busbars 200 has a first end connecting section 210, a middle connecting section 220, and a second end connecting section 230 that are bent in sequence, the middle connecting sections 220 of the three copper busbars 200 are not all located on the same side of the first end connecting section 210. Instead, the middle connecting section 220 of one copper busbar 200 is bent to the first side, and the middle connecting sections 220 of the other two copper busbars 200 are bent to the opposite second side. In this way, the middle connecting sections 220 of the three copper busbars 200 form a three-dimensional staggered layout in space, which is equivalent to dispersing the three middle connecting sections 220 that originally needed to be arranged in the same plane area to the areas on two opposite sides. This makes full use of the space on both sides of the first end connecting section 210, thereby effectively reducing the overall width and projected area of ​​the copper busbar group in a single direction while ensuring the safe distance between phases, making the overall structure more compact and the volume significantly reduced. Meanwhile, the three first end connecting sections 210 and the three second end connecting sections 230 can remain parallel and coplanar, facilitating docking and installation with the motor wiring terminals and controller output terminals. Furthermore, the mounting base 100 has two openings from which the first end connecting sections 210 and the second end connecting sections 230 extend, respectively, to achieve a reliable seal with the sealing ring 300, effectively solving the sealing difficulties in the prior art.

[0065] Based on the same inventive concept, a second aspect of this application discloses an electric drive assembly, which includes a motor, a controller, and a three-phase copper busbar as disclosed in any of the first aspects of the embodiment. The motor and the controller are electrically connected via the three-phase copper busbar.

[0066] The electric drive assembly disclosed in this application employs a compact, three-dimensionally interlaced layout of the three-phase copper busbars. This effectively reduces the space occupied by the connection structure between the motor and the controller in both the axial and radial directions, which is beneficial for the overall miniaturization and lightweight design of the electric drive assembly. Simultaneously, due to the reduced overall projected area of ​​the 200 copper busbars, the perimeter of the sealing interface of the mounting base 100 is correspondingly reduced, resulting in a more reliable seal.

[0067] Based on the same inventive concept, a third aspect of this application discloses a vehicle that includes the electric drive assembly disclosed in any of the second aspects of the above.

[0068] The vehicle disclosed in this application is a pure electric vehicle or a hybrid vehicle. Due to the adoption of the aforementioned electric drive assembly, the vehicle's drive system structure is more compact and more reliable, which helps to improve the vehicle's range and safety.

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention have been clearly and completely described above with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0070] Therefore, the above detailed description of the embodiments of the invention disclosed in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0071] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0072] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0075] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0076] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A three-phase copper busbar, characterized in that, The device includes a mounting base and three copper busbars mounted in the mounting base. Each copper busbar includes a first end connecting section, a middle connecting section, and a second end connecting section that are connected in sequence and arranged at an angle to each other. The middle connecting section of one copper busbar is located on the first side of the first end connecting section, and the middle connecting sections of the remaining two copper busbars are located on the second side of the first end connecting section. The first side and the second side are opposite sides.

2. The three-phase copper busbar according to claim 1, characterized in that, The two middle connecting sections located on the second side are coplanar; the middle connecting section of the middle copper busbar is located inside the middle connecting section of the other copper busbar.

3. The three-phase copper busbar according to claim 2, characterized in that, Both of the middle connecting sections located on the second side are L-shaped.

4. The three-phase copper busbar according to any one of claims 1 to 3, characterized in that, The first end connecting segment and the second end connecting segment are disposed opposite to each other on the third and fourth sides of the middle connecting segment; and / or The three first end connecting segments are parallel and coplanar, and the three second end connecting segments are parallel and coplanar.

5. The three-phase copper busbar according to claim 4, characterized in that, The mounting base has a mounting cavity and two openings; the middle connecting section is located inside the mounting cavity, and the first end connecting section and the second end connecting section extend outwards through the two openings respectively.

6. The three-phase copper busbar according to claim 5, characterized in that, The mounting base includes a mounting plate and two protective frames. The mounting cavity is located on the mounting plate, and the two openings are located in the two protective frames respectively.

7. The three-phase copper busbar according to claim 6, characterized in that, Two baffles are provided on the protective frame, and the baffles are respectively located between two adjacent first end connecting segments and between two adjacent second end connecting segments.

8. The three-phase copper busbar according to claim 5, characterized in that, The mounting base is provided with a sealing ring at both of the openings. One of the mounting base and the sealing ring is provided with a protrusion, and the other is provided with a slot. The protrusion is embedded in the slot.

9. An electric drive assembly, characterized in that, It includes a motor, a controller, and a three-phase copper busbar as described in any one of claims 1 to 8, wherein the motor and the controller are electrically connected via the three-phase copper busbar.

10. A vehicle, characterized in that, Includes the electric drive assembly as described in claim 9.

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