Busbar assembly, motor and vehicle

Abstract

The invention provides a busbar assembly, a motor and a vehicle, and relates to the technical field of vehicles, the busbar assembly comprises phase copper bars, star point copper bars and an injection molding framework, the phase copper bars and the star point copper bars are respectively and partially wrapped in the injection molding framework and are used for being arranged at intervals along the circumferential direction of a stator winding, a through hole is formed in the part, wrapped in the injection molding framework, of the star point copper bar, and a part of the injection molding framework is filled in the through hole. Therefore, the phase copper bars and the star point copper bars can be connected into a whole in an injection molding mode, a set of clamping tool and a set of welding tool can be conveniently adopted for welding operation, production efficiency is improved, the injection molding framework can be utilized to penetrate through the star point copper bars to improve the structural strength of the whole bus-bar, and the service life of the bus-bar is prolonged. And the risk of breakage of the busbar due to vibration is further reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a bus assembly, a motor, and a vehicle. Background Technology

[0002] Currently, electric motors in new energy vehicles typically employ a Y-connection (also known as a star connection) with multiple parallel branches. The neutral point (star point) of each phase winding is electrically connected to the lead wires of the phase windings via a busbar. For motors with three parallel branches in a star connection, the busbar includes a star point copper busbar and three-phase copper busbars, requiring 18 soldering pins. Separating the star point and three-phase copper busbars necessitates an additional clamping and soldering fixture, extending the production cycle time. Furthermore, the electrical clearances and creepage distances between the phase soldering pins and the star point soldering pins must be considered, resulting in a longer overall busbar length, weaker structural strength, and increased susceptibility to breakage due to vibration. Summary of the Invention

[0003] The problem this invention addresses is how to improve the production efficiency of busbars while reducing the probability of busbar breakage due to vibration.

[0004] To address the above problems, the present invention provides a bus assembly, a motor, and a vehicle.

[0005] In a first aspect, the present invention provides a busbar assembly, including a phase copper busbar, a star copper busbar, and an injection-molded frame. The phase copper busbar and the star copper busbar are respectively partially enclosed in the injection-molded frame and are arranged at intervals along the circumference of the stator winding. The portion of the star copper busbar enclosed in the injection-molded frame is provided with a through hole, and a portion of the injection-molded frame is filled in the through hole.

[0006] Optionally, the through hole is located at both ends of the star-shaped copper busbar along the circumference of the stator winding.

[0007] Optionally, the injection-molded skeleton has a slot that extends through its thickness at its edge, and the slot is located between the phase copper busbar pin and the star copper busbar pin along the circumference of the stator winding.

[0008] Optionally, the star-shaped copper busbar includes a star-shaped copper busbar body, star-shaped copper busbar pins, and a reinforcing portion. The star-shaped copper busbar body is enclosed within the injection-molded skeleton and located on the side of the slot away from the phase copper busbar. One end of the star-shaped copper busbar pin is connected to the star-shaped copper busbar body, and the other end extends out of the injection-molded skeleton. The reinforcing portion is enclosed within the injection-molded skeleton, and one end of the reinforcing portion is connected to the end of the star-shaped copper busbar body near the phase copper busbar, while the other end of the reinforcing portion extends to the side of the slot near the phase copper busbar.

[0009] Optionally, the injection-molded skeleton is provided with a plurality of first grooves arranged circumferentially along the stator winding, each first groove being provided between two adjacent phase copper busbar pins, and the bottom wall of the first groove having a bent structure. And / or, the injection-molded skeleton is provided with a plurality of second grooves arranged circumferentially along the stator winding, each second groove being provided between two adjacent star point copper busbar pins, and the bottom wall of the second groove having a bent structure.

[0010] Optionally, the bottom wall of the first groove and / or the second groove has a stepped structure.

[0011] Optionally, the injection-molded skeleton is provided with a first slot and a second slot, the first slot and the second slot respectively penetrating the injection-molded skeleton along the thickness direction. The first slot is arranged one-to-one with the phase copper busbar pins of the phase copper busbar and is used for the phase lead wires of the stator winding to pass through. The second slot is arranged one-to-one with the star copper busbar pins of the star copper busbar and is used for the star lead wires of the stator winding to pass through. The thickness of the injection-molded skeleton at the first slot and the second slot is less than the thickness of the part of the injection-molded skeleton that wraps the phase copper busbar and the star copper busbar.

[0012] Optionally, the injection-molded skeleton has a first support hole and a second support hole at one end along its thickness direction. The first support hole is corresponding to the part of the phase copper busbar that is wrapped inside the injection-molded skeleton and exposes a portion of the phase copper busbar. The second support hole is corresponding to the part of the star copper busbar that is wrapped inside the injection-molded skeleton and exposes a portion of the star copper busbar.

[0013] In a second aspect, the present invention provides an electric motor including the bus assembly described above.

[0014] Thirdly, the present invention provides a vehicle including the motor described above.

[0015] The beneficial effects of the busbar assembly of the present invention are as follows: By arranging the phase copper busbar and the star copper busbar circumferentially along the stator winding and partially encasing them within an injection-molded frame, the phase copper busbar and the star copper busbar can be integrally connected by injection molding. This facilitates the use of a single set of clamping and welding fixtures for welding the phase copper busbar and the star copper busbar, which not only improves the production efficiency of the motor but also reduces the tooling cost of the busbar assembly. Furthermore, by providing through holes in the portions of the star copper busbar encased within the injection-molded frame, the injection-molded frame can penetrate the star copper busbar at the through holes during injection molding of the phase copper busbar and the star copper busbar. This allows the injection-molded frame encasing the star copper busbar to be connected through the through-holes, which not only fixes the star copper busbar but also improves the structural strength of the injection-molded frame and the entire busbar assembly, thereby reducing the risk of breakage due to vibration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly structure of the busbar assembly and the stator winding in an embodiment of the present invention; Figure 2 This is a schematic diagram of the bus assembly in an embodiment of the present invention; Figure 3 This is an exploded view of the busbar assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the bus assembly from another perspective in an embodiment of the present invention; Figure 5 for Figure 4 Schematic diagram of the cross section at point AA; Figure 6 This is a structural schematic diagram of the bus assembly from another perspective in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the busbar assembly at the second groove in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Phase copper busbar; 11. Phase copper busbar body; 12. Terminal block; 13. Phase copper busbar pin; 2. Star copper busbar; 21. Star copper busbar body; 211. Through hole; 22. Star copper busbar pin; 23. Reinforcing part; 3. Injection molded frame; 31. Slot; 32. First groove; 33. Second groove; 34. Third groove; 35. First slot; 36. Second slot; 37. First support hole; 38. Second support hole; 39. Positioning hole; 400. Stator winding; 410. Phase lead wire welding end; 420. Star lead wire welding end. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] In the attached figures, the X-axis represents the front-to-back position, with the positive direction of the X-axis representing the front and the negative direction representing the rear. The Y-axis represents the left-to-right position, with the positive direction representing the left and the negative direction representing the right. The Z-axis represents the up-down position, with the positive direction representing the top and the negative direction representing the bottom. It should be noted that the aforementioned representations of the X, Y, and Z axes are for ease of description and simplification of the invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0020] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] In related technologies, the motors of new energy vehicles typically adopt a Y-connection (also known as a star connection) with multiple parallel branches. The neutral point (i.e., the star point) of the phase windings is electrically connected to the leads of the phase windings through a busbar. For motors with three parallel branches in a star connection, the busbar includes the star point copper busbar and the three-phase copper busbar, with a total of 18 welding pins requiring welding. If the star point copper busbar and the three-phase copper busbar are laid out separately, the production process requires an additional clamping and welding fixture, leading to a longer production cycle. Furthermore, the electrical clearance and creepage distance between the phase welding pins and the star point welding pins must be considered, resulting in a longer overall busbar length, weaker structural strength, and susceptibility to breakage due to vibration.

[0023] To address the problems existing in the aforementioned related technologies, embodiments of the present invention provide a bus assembly, a motor, and a vehicle.

[0024] Combination Figure 1 , Figure 2 and Figure 3 As shown, a busbar assembly according to an embodiment of the present invention includes a phase copper busbar 1, a star copper busbar 2, and an injection-molded frame 3. The phase copper busbar 1 and the star copper busbar 2 are respectively partially wrapped in the injection-molded frame 3 and are used to be arranged at intervals along the circumference of the stator winding 400. The part of the star copper busbar 2 wrapped in the injection-molded frame 3 is provided with a through hole 211, and a part of the injection-molded frame 3 is filled in the through hole 211.

[0025] Specifically, the phase copper busbars 1 and star copper busbars 2 of the busbar assembly are spaced apart circumferentially along the stator winding 400, and each phase copper busbar 1 and star copper busbar 2 is partially encased within an injection-molded frame 3. In other words, the phase copper busbars 1 and star copper busbars 2 are injection-molded into a single structure using injection molding material, which then forms the injection-molded frame 3. The number of phase copper busbars 1 corresponds to the number of phase windings in the stator winding 400, while the number of star copper busbars 2 is typically set to one. For example, if the stator winding 400 includes three phase windings, then there are three phase copper busbars 1. In addition, the portion of the star-shaped copper busbar 2 enclosed within the injection-molded skeleton 3 has a through hole 211. The through hole 211 penetrates the star-shaped copper busbar body 21 along its thickness direction. The through hole 211 can be located in the middle of the star-shaped copper busbar body 21 or at both ends of the star-shaped copper busbar body 21 along the circumference of the stator winding 400; no specific limitation is made here. When the phase copper busbar 1 and the star-shaped copper busbar 2 are injection molded, the injection molding material constituting the injection-molded skeleton 3 can be filled into the through hole 211 of the star-shaped copper busbar 2, so that the injection-molded skeleton 3 penetrates the star-shaped copper busbar 2 at the through hole 211 after injection molding. That is, the injection-molded skeleton 3 located at both ends of the star-shaped copper busbar body 21 in the thickness direction is connected by the injection-molded skeleton 3 filled in the through hole 211. In other words, the injection-molded skeleton 3 enclosing the star-shaped copper busbar 2 is connected by the injection-molded skeleton 3 penetrating the star-shaped copper busbar 2.

[0026] In this embodiment, the phase copper busbar 1 and the star copper busbar 2 are arranged at circumferential intervals along the stator winding 400 and partially encased within the injection-molded frame 3, allowing them to be integrally connected by injection molding. This facilitates the use of a single set of clamping and welding fixtures for welding the phase copper busbar 1 and the star copper busbar 2, improving motor production efficiency and reducing tooling costs for the busbar assembly. Furthermore, by providing through holes 211 within the injection-molded frame 3 of the star copper busbar 2, the injection-molded frame 3 can penetrate the star copper busbar 2 during injection molding. This allows the injection-molded frame 3, which encases the star copper busbar 2, to be connected, not only fixing the star copper busbar 2 but also increasing the structural strength of the injection-molded frame 3 and the entire busbar assembly, thereby reducing the risk of breakage due to vibration.

[0027] Optionally, combined Figure 1 , Figure 4 and Figure 5 As shown, through holes 211 are provided at both ends of the star-point copper busbar 2 along the circumference of the stator winding 400. Specifically, the star-point copper busbar body 21 of the star-point copper busbar 2 is provided with two through holes 211, which are located at both ends of the star-point copper busbar body 21 along the circumference of the stator winding 400. In this way, the injection-molded frame 3 can penetrate the star-point copper busbar 2 at both ends of the star-point copper busbar 2 along the circumference of the stator winding 400, so as to further improve the stability of the star-point copper busbar 2 fixed in the injection-molded frame 3 and the structural strength of the injection-molded frame 3, thereby further reducing the risk of busbar breakage.

[0028] Optionally, combined Figure 2 , Figure 4 and Figure 5 As shown, the injection-molded skeleton 3 has a slot 31 that runs through its thickness direction at the edge. Along the circumference of the stator winding 400, the slot 31 is located between the phase copper bus pin 13 of the phase copper bus 1 and the star copper bus pin 22 of the star copper bus 2.

[0029] It should be noted that the stator winding 400 includes multi-phase windings, each of which includes multiple parallel branches. The phase lead welding end 410 refers to the beginning of each branch in the phase winding, and the star point lead welding end 420 refers to the end of each branch in the phase winding.

[0030] Specifically, the injection-molded frame 3 has an overall arc-shaped flat plate structure. The slot 31 can be set on the radial inner side of the injection-molded frame 3 (that is, on the side of the injection-molded frame 3 near the central axis of the stator winding 400). The slot 31 not only runs through the thickness direction of the injection-molded frame 3, but also runs through the radial inner side of the injection-molded frame 3. In other words, the slot 31 is equivalent to a notch structure on the injection-molded frame 3. The phase copper bus pin 13 of the phase copper bus 1 and the star copper bus pin 22 of the star copper bus 2 are both located outside the injection-molded frame 3. The phase copper bus pin 13 is used to form an electrical connection with the phase lead welding end 410 of the stator winding 400 by welding. The star copper bus pin 22 is used to form an electrical connection with the star lead welding end 420 of the stator winding 400 by welding. Moreover, each phase copper bus pin 13 is located at one end of the slot 31 along the circumference of the stator winding 400, and the star copper bus pin 22 is located at the other end of the slot 31 along the circumference of the stator winding 400, that is, the phase copper bus pin 13 and the star copper bus pin 22 are separated by the slot 31.

[0031] In this way, the slot 31 can be used to increase the electrical clearance and creepage distance between the phase copper bus pin 13 and the star copper bus pin 22, preventing phenomena such as insulation breakdown and short circuit, thereby improving the safety of the bus when in use.

[0032] Optionally, combined Figure 3 and Figure 5 As shown, the star-shaped copper busbar 2 includes a star-shaped copper busbar body 21, star-shaped copper busbar pins 22, and a reinforcing part 23. The star-shaped copper busbar body 21 is enclosed in the injection-molded skeleton 3 and located on the side of the slot 31 away from the phase copper busbar 1. One end of the star-shaped copper busbar pins 22 is connected to the star-shaped copper busbar body 21, and the other end extends out of the injection-molded skeleton 3. The reinforcing part 23 is enclosed in the injection-molded skeleton 3, and one end of the reinforcing part 23 is connected to the end of the star-shaped copper busbar body 21 near the phase copper busbar 1, and the other end of the reinforcing part 23 extends to the side of the slot 31 near the phase copper busbar 1.

[0033] In this optional embodiment, the star-point copper busbar 2's body 21 and reinforcing portion 23 are both enclosed within the injection-molded frame 3. The star-point copper busbar body 21 may have an arc-shaped flat plate structure extending circumferentially along the stator winding 400, and through holes 211 are provided at both ends of the star-point copper busbar body 21 along the circumferential direction of the stator winding 400. One end of each star-point copper busbar pin 22 of the star-point copper busbar 2 is connected to the radially inner side of the star-point copper busbar body 21 (i.e., the side of the star-point copper busbar body 21 near the central axis of the stator winding 400), and the other end extends axially along the stator winding 400 to the outside of the injection-molded frame 3. The reinforcing portion 23 is connected to the end of the star-point copper busbar body 21 near the phase copper busbar 1, that is, in the circumferential direction of the stator winding 400, the reinforcing portion 23 is located between the star-point copper busbar body 21 and the phase copper busbar 1. Moreover, the end of the reinforcing portion 23 away from the star-point copper busbar body 21 extends to the side of the slot 31 near the phase copper busbar 1. In this way, the reinforcing part 23 spans the slotted area (i.e., the location of the slot 31) inside the injection molded skeleton 3. Thus, the reinforcing part 23 can enhance the structural strength of the injection molded skeleton 3 at the slot 31. This ensures that the slotted area of ​​the injection molded skeleton 3 can guarantee a safe electrical clearance and creepage distance between the star copper bus pin 22 and the phase copper bus pin 13, while also having high structural strength. This reduces the probability of the injection molded skeleton 3 breaking and improves the reliability of the busbar during use.

[0034] Optionally, combined Figure 2 and Figure 3 As shown, the phase copper bus 1 includes a phase copper bus body 11, a terminal block 12, and a phase copper bus pin 13. A portion of the phase copper bus body 11 is enclosed in the injection molded frame 3. One end of the phase copper bus pin 13 is connected to the part of the phase copper bus body 11 enclosed in the injection molded frame 3, and the other end extends out of the injection molded frame 3. The terminal block 12 is connected to the part of the phase copper bus body 11 located outside the injection molded frame 3.

[0035] In this optional embodiment, a portion of the phase busbar body 11 of each phase busbar 1 is enclosed within the injection-molded frame 3, while the other portion is located outside the injection-molded frame 3. The terminal block 12 for connecting to the phase line of an external power supply is typically welded to the portion of the phase busbar body 11 located outside the injection-molded frame 3. One end of the phase busbar pin 13 is connected to the portion of the phase busbar body 11 enclosed within the injection-molded frame 3, and the other end extends axially along the stator winding 400 to the outside of the injection-molded frame 3. This achieves an integrated connection between the phase busbar 1 and the injection-molded frame 3.

[0036] Optionally, combined Figure 2 and Figure 7 As shown, the injection-molded skeleton 3 is provided with a plurality of first grooves 32 arranged circumferentially along the stator winding 400. Each first groove 32 is provided between two adjacent phase copper bus pins 13 of the phase copper bus 1, and the bottom wall of the first groove 32 has a bent structure. And / or, the injection-molded skeleton 3 is provided with a plurality of second grooves 33 arranged circumferentially along the stator winding 400, each second groove 33 being provided between two adjacent star copper bus pins 22 of the star copper bus 2, and the bottom wall of the second groove 33 having a bent structure.

[0037] Specifically, in each phase copper busbar, a first groove 32 is provided on the injection molded frame 3 located between two adjacent phase copper busbar pins 13, and in the star copper busbar 2, a second groove 33 is provided on the injection molded frame 3 located between two adjacent star copper busbar pins 22.

[0038] In this way, while achieving weight reduction, the bottom wall of the first groove 32 and / or the second groove 33 can be used as a bent reinforcing rib to improve the structural strength of the injection molded skeleton 3 between the copper busbar pins, thereby reducing the amount of deformation of this part under vibration, further reducing the probability of the injection molded skeleton 3 breaking, and improving the reliability of the busbar during use.

[0039] Optionally, combined Figure 2 As shown, the injection-molded frame 3 is also provided with multiple third grooves 34, which are located between two adjacent phase copper busbars 1. This allows the third grooves 34 to be used to increase the electrical clearance and creepage distance between each phase copper busbar, thereby improving the safety of the busbar during use.

[0040] Furthermore, the bottom wall of the third groove 34 is also bent. In this way, while increasing the electrical clearance and creepage distance between the copper busbars of each phase, the bottom wall of the third groove 34 can be used as a bent reinforcing rib to improve the structural strength of the injection-molded frame 3 between the copper busbars of each phase, thereby reducing the deformation of this part under vibration, reducing the probability of breakage of the injection-molded frame 3, and improving the reliability of the busbar during use.

[0041] Optionally, combined Figure 2 and Figure 5 As shown, the injection-molded frame 3 is provided with a first slot 35 and a second slot 36. The first slot 35 and the second slot 36 penetrate the injection-molded frame 3 along the thickness direction of the injection-molded frame 3. The first slot 35 is set one-to-one with the phase copper bus pin 13 of the phase copper bus 1 and is used for the phase lead welding end 410 of the stator winding 400 to pass through. The second slot 36 is set one-to-one with the star copper bus pin 22 of the star copper bus 2 and is used for the star lead welding end 420 of the stator winding 400 to pass through. The thickness of the injection-molded frame 3 at the first slot 35 and the second slot 36 is less than the thickness of the part of the injection-molded frame 3 that wraps the phase copper bus 1 and the star copper bus 2.

[0042] In this optional embodiment, the first slot 35 and the second slot 36 are disposed through the injection-molded skeleton 3 along its thickness direction. The first slot 35 is positioned near the portion of the phase copper busbar pin 13 that extends out of the injection-molded skeleton 3, and the second slot 36 is positioned near the portion of the phase star copper busbar pin 22 that extends out of the injection-molded skeleton 3. Thus, by providing the first slot 35 and the second slot 36 on the injection-molded skeleton 3, respectively, positions are provided for the phase lead welding end 410 and the star lead welding end 420 of the sub-winding 400, facilitating the welding of the copper busbar pins to their corresponding lead welding ends. Simultaneously, by setting the thickness of the injection-molded skeleton 3 at the first slot 35 and the second slot 36 to be less than the thickness of the portion of the injection-molded skeleton 3 that encloses the phase copper busbar 1 and the star copper busbar 2, the material used in the injection-molded skeleton 3 is reduced, lowering production costs.

[0043] Optionally, combined Figure 6 As shown, the injection molded skeleton 3 has a first support hole 37 and a second support hole 38 at one end along its thickness direction. The first support hole 37 is corresponding to the part of the phase copper busbar 1 wrapped inside the injection molded skeleton 3 and exposes part of the phase copper busbar 1. The second support hole 38 is corresponding to the part of the star copper busbar 2 wrapped inside the injection molded skeleton 3 and exposes part of the star copper busbar 2.

[0044] In this optional embodiment, multiple first support holes 37 and second support holes 38 can be provided along the circumference of the stator winding 400. Since the phase busbar body 11 of each phase busbar 1 is composed of multiple conductors, and the number of conductors is the same as the number of phase busbar pins 13, the number of first support holes 37 can be set to be the same as the number of phase busbar pins 13. For example, for a three-phase, three-branch parallel stator winding 400, there are three phase busbars 1, each phase busbar 1 including three phase busbar pins 13, so there are nine first support holes 37. The number of second support holes 38 can be two, three, or four, etc. Figure 6 An example with three second support holes 38 is given. During injection molding of the phase copper busbar 1 and the star copper busbar 2, some ejector pins on the injection mold abut against the phase copper busbar body 11, and other ejector pins abut against the star copper busbar body 21 to fix the phase copper busbar 1 and the star copper busbar 2. After injection molding is completed, the injection molding skeleton 3 forms the first support hole 37 and the second support hole 38 at the location of the ejector pins. In this way, by providing the first support hole 37 and the second support hole 38 on the injection molding skeleton 3, the ejector pins of the injection mold can fix the phase copper busbar 1 and the star copper busbar 2 by pressing against them, preventing the phase copper busbar 1 and the star copper busbar 2 from shaking and affecting the injection molding quality.

[0045] Furthermore, combined Figure 6As shown, the injection-molded frame 3 is also provided with positioning holes 39, which are used to engage with positioning posts on the welding fixture to position the busbar assembly. This improves the convenience of welding operations and ensures the accurate welding position of the busbar.

[0046] An embodiment of the present invention provides an electric motor, which includes the bus assembly described above.

[0047] The beneficial effects of the motor in this embodiment are the same as those of the bus assembly described above, and will not be repeated here.

[0048] A vehicle according to an embodiment of the present invention includes a motor as described above.

[0049] The beneficial effects of the vehicle in this embodiment are the same as those of the motor described above, and will not be repeated here.

[0050] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A bus assembly, characterized in that, It includes a phase copper busbar (1), a star copper busbar (2) and an injection molded frame (3). The phase copper busbar (1) and the star copper busbar (2) are respectively partially wrapped in the injection molded frame (3) and are used to be arranged at intervals along the circumference of the stator winding (400). The part of the star copper busbar (2) wrapped in the injection molded frame (3) is provided with a through hole (211), and a part of the injection molded frame (3) is filled in the through hole (211).

2. The bus assembly according to claim 1, characterized in that, The through hole (211) is located at both ends of the star-shaped copper busbar (2) along the circumference of the stator winding (400).

3. The bus assembly according to claim 1, characterized in that, The injection-molded skeleton (3) has a slot (31) that runs through its thickness direction at its edge. Along the circumference of the stator winding (400), the slot (31) is located between the phase copper bus pin (13) of the phase copper bus (1) and the star copper bus pin (22) of the star copper bus (2).

4. The bus assembly according to claim 3, characterized in that, The star-shaped copper busbar (2) includes a star-shaped copper busbar body (21), star-shaped copper busbar pins (22), and a reinforcing part (23). The star-shaped copper busbar body (21) is wrapped inside the injection-molded skeleton (3) and located on the side of the slot (31) away from the phase copper busbar (1). One end of the star-shaped copper busbar pin (22) is connected to the star-shaped copper busbar body (21), and the other end extends out of the injection-molded skeleton (3). The reinforcing part (23) is wrapped inside the injection-molded skeleton (3), and one end of the reinforcing part (23) is connected to the end of the star-shaped copper busbar body (21) near the phase copper busbar (1). The other end of the reinforcing part (23) extends to the side of the slot (31) near the phase copper busbar (1).

5. The bus assembly according to claim 1, characterized in that, The injection-molded skeleton (3) is provided with a plurality of first grooves (32) arranged circumferentially along the stator winding (400). Each first groove (32) is located between two adjacent phase copper bus pins (13) of the phase copper bus (1), and the bottom wall of the first groove (32) has a bent structure. And / or, the injection-molded skeleton (3) is provided with a plurality of second grooves (33) arranged circumferentially along the stator winding (400), each of the second grooves (33) being located between two adjacent star copper bus pins (22) of the star copper bus (2), and the bottom wall of the second groove (33) having a bent structure.

6. The bus assembly according to claim 1, characterized in that, The injection-molded skeleton (3) is provided with a plurality of third grooves (34), and the plurality of third grooves (34) are respectively located between two adjacent phase copper busbars (1).

7. The bus assembly according to claim 1, characterized in that, The injection-molded skeleton (3) is provided with a first slot (35) and a second slot (36). The first slot (35) and the second slot (36) pass through the injection-molded skeleton (3) along the thickness direction of the injection-molded skeleton (3). The first slot (35) is set one-to-one with the phase copper bus pin (13) of the phase copper bus (1) and is used for the phase lead of the stator winding (400) to pass through. The second slot (36) is set one-to-one with the star copper bus pin (22) of the star copper bus (2) and is used for the star lead of the stator winding (400) to pass through. The thickness of the injection-molded skeleton (3) at the first slot (35) and the second slot (36) is less than the thickness of the part of the injection-molded skeleton (3) that wraps the phase copper bus (1) and the star copper bus (2).

8. The bus assembly according to claim 1, characterized in that, The injection molded skeleton (3) has a first support hole (37) and a second support hole (38) at one end along its thickness direction. The first support hole (37) is corresponding to the part of the phase copper busbar (1) wrapped in the injection molded skeleton (3) and exposes part of the phase copper busbar (1). The second support hole (38) is corresponding to the part of the star copper busbar (2) wrapped in the injection molded skeleton (3) and exposes part of the star copper busbar (2).

9. An electric motor, characterized in that, Includes the bus assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the motor as described in claim 9.

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