Busbar assembly, motor and vehicle
By setting phase copper busbars and star copper busbars at circumferential intervals in the stator winding, and using an insulating frame and limiting structure to fix the phase leads, the structural strength problem at the busbar welding position is solved, thereby improving vibration resistance and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI INFIMOTION PROPULSION TECH CO LTD
- Filing Date
- 2025-02-10
- Publication Date
- 2026-05-05
AI Technical Summary
In the existing technology, the busbar is directly suspended and welded to the stator winding, resulting in low structural strength at the welding position, which makes it prone to vibration fracture.
Design a busbar assembly including phase copper busbars and star copper busbars spaced circumferentially along the stator winding. Use an insulating frame and limiting structure to fix the welding end of the phase lead wire at the position of the phase copper busbar pin to avoid vibration transmission. The structural strength of the welding position is improved by independently designing the phase copper busbars and star copper busbars.
It improves the vibration resistance of the busbar and stator winding welding position, reduces the risk of vibration fracture, simplifies the mechanical structure, reduces production costs and weight, and improves the convenience and versatility of welding operations.
Smart Images
Figure CN224204933U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle parts technology, specifically to a busbar assembly, a motor, and a vehicle. Background Technology
[0002] In the motor systems of new energy vehicles, busbars are typically used to connect the motor stator windings to an external power source to facilitate current transfer between them. However, in related technologies, the busbars are directly suspended and welded to the stator windings, resulting in lower strength at the welded locations and a higher risk of vibration-induced breakage. Utility Model Content
[0003] The problem this invention addresses is: how to improve the structural strength at the welding point between the motor busbar and the stator winding.
[0004] To address the aforementioned problems, this utility model provides a busbar assembly, a motor, and a vehicle.
[0005] In a first aspect, this utility model provides a busbar assembly, including phase copper busbars and star copper busbars arranged circumferentially along a stator winding. The phase copper busbars include an insulating frame and a phase copper busbar body disposed on the insulating frame. The phase copper busbar pins of the phase copper busbar body are used to be attached to the welding end of the phase lead of the stator winding. The star copper busbar pins are used to be attached to the welding end of the star lead of the stator winding. A limiting structure is provided on the insulating frame, which is used to restrict the welding end of the phase lead to a position attached to the phase copper busbar pin.
[0006] Optionally, the limiting structure is a limiting hole, which is used to insert the welding end of the phase lead wire, and the insulating frame is bonded to the welding end of the phase lead wire at the limiting hole.
[0007] Optionally, the insulating frame is further provided with a connecting groove, the opening of the connecting groove is located on the side of the insulating frame away from the stator winding, and two adjacent limiting holes are connected through the connecting groove.
[0008] Optionally, the phase copper bus pin is located at the edge of the limiting hole and is arranged parallel to the center line of the limiting hole.
[0009] Optionally, multiple phase copper busbars are provided, and the multiple phase copper busbars are respectively arranged corresponding to the multi-phase windings of the stator winding, and the insulating skeleton of the multiple phase copper busbars is integrally formed.
[0010] Optionally, on the circumference of the stator winding, the central angle formed by the radius of the end of the insulating frame away from the star copper busbar and the radius of the end of the star copper busbar away from the insulating frame is less than 90°.
[0011] Optionally, the insulating frame is provided with a first limiting boss on the side facing the stator winding, and the first limiting boss is used to be inserted into the end gap of the stator winding.
[0012] Optionally, the phase copper busbar further includes a connecting wire and a terminal block. One end of the connecting wire is connected to the phase copper busbar body, and the other end is connected to the terminal block. The terminal block is provided with a connecting hole and a second limiting boss. The terminal block is used to connect to the phase line of an external power source at the connecting hole via a fastener. The second limiting boss is arranged around the connecting hole and is used to restrict the terminal block from rotating relative to the phase line of the external power source.
[0013] Secondly, this utility model provides an electric motor, including a stator winding and a busbar assembly as described above. The busbar assembly is disposed at one end of the stator winding, and the phase copper busbar of the busbar assembly is bonded to the phase lead welding end of the stator winding, and the star copper busbar of the busbar assembly is bonded to the star lead welding end of the stator winding.
[0014] Thirdly, this utility model provides a vehicle that includes the bus assembly described above, or includes the motor described above.
[0015] The beneficial effects of this utility model's busbar assembly, motor, and vehicle are as follows: By arranging the phase copper busbar and star copper busbar at intervals along the circumference of the stator winding, the busbar assembly can have a split structure. On the one hand, this facilitates independent design of the phase copper busbar and star copper busbar, and also allows for separate design of the phase leads and star leads of the stator winding. This eliminates the need for additional insulation design and overall injection molding design for the phase leads and star leads, thereby reducing the envelope of the motor stator. On the other hand, it prevents the vibration experienced by the phase copper busbar from being transmitted to the star copper busbar, thereby reducing the stress at the welding positions of the star copper busbar pins and the star leads of the stator winding, thus reducing the risk of vibration-induced breakage of the stator winding at the star lead welding ends. Furthermore, arranging the phase busbars and star busbars circumferentially along the stator winding allows for a larger spacing between their pins, improving the ease of soldering each busbar and preventing short circuits. This also minimizes the radial space occupied by the phase and star busbars along the stator winding. Moreover, by placing the insulating frame only on the phase busbars and mounting the phase busbar body on this frame, instead of on the star busbars, the mechanical structure of the busbar assembly can be simplified while supporting the phase busbar body, reducing production costs and weight. Furthermore, by setting a limiting structure on the insulating frame, the phase lead welding end of the stator winding is fixed at the position where it is welded to the phase copper bus pin. This reduces the transmission of vibration force and stress at the welding position between the phase copper bus pin and the phase lead welding end, thereby reducing the risk of vibration fracture of the stator winding at the phase lead welding end. This results in higher structural strength at the welding position between the busbar assembly and the stator winding, thus improving the vibration resistance of both at the welding position. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the busbar assembly in an embodiment of the present invention;
[0017] Figure 2 This is a schematic diagram of the assembly structure of the busbar assembly and the stator winding in an embodiment of this utility model;
[0018] Figure 3 This is a schematic diagram of the assembly structure of the busbar assembly and the stator winding from another perspective in an embodiment of this utility model;
[0019] Figure 4 This is a schematic diagram of the phase copper busbar in an embodiment of this utility model;
[0020] Figure 5 This is a schematic diagram of the structure of the phase copper busbar body and the insulating frame during injection molding in an embodiment of this utility model;
[0021] Figure 6 This is a cross-sectional view of the copper busbar body and the insulating frame during injection molding in an embodiment of this utility model.
[0022] Figure 7 This is a schematic diagram showing the distribution of the star-shaped copper busbar and the insulating frame in the circumferential direction of the stator winding in this embodiment of the present invention.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Phase copper busbar; 11. Insulating frame; 111. Limiting structure; 112. Connecting slot; 113. First limiting boss; 12. Phase copper busbar body; 121. Phase copper busbar pin; 13. Connecting wire; 14. Terminal; 141. Connecting hole; 142. Second limiting boss; 2. Star copper busbar; 21. Star copper busbar body; 211. Star copper busbar pin; 22. Wiring part; 300. Stator winding; 310. Phase lead wire welding end; 320. Star lead wire welding end. Detailed Implementation
[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model 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 this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.
[0026] In the attached diagram, the Z-axis represents the vertical direction, that is, the up and down position, with the positive direction of the Z-axis representing upward and the negative direction representing downward. It should also be noted that the aforementioned representation of the Z-axis is only for the convenience of describing this utility model and simplifying the description, and does 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, and therefore should not be construed as a limitation of this utility model.
[0027] 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 utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.
[0028] It should be noted that the terms "one" and "multiple" used in this utility model 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".
[0029] In the motor systems of new energy vehicles, busbars are typically used to connect the motor stator windings to an external power source to facilitate current transfer between them. However, in related technologies, the busbars are directly suspended and welded to the stator windings, resulting in lower strength at the welded locations and a higher risk of vibration-induced breakage.
[0030] In view of the problems existing in the above-mentioned related technologies, this utility model provides a bus assembly, a motor and a vehicle.
[0031] Combination Figures 1 to 3 As shown in the figure, a busbar assembly provided by this utility model includes a phase copper busbar 1 and a star copper busbar 2 arranged circumferentially along the stator winding 300. The phase copper busbar 1 includes an insulating frame 11 and a phase copper busbar body 12 disposed on the insulating frame 11. The phase copper busbar pins 121 of the phase copper busbar body 12 are used to be attached to the phase lead welding end 310 of the stator winding 300. The star copper busbar pins 211 of the star copper busbar 2 are used to be attached to the star lead welding end 320 of the stator winding 300. A limiting structure 111 is provided on the insulating frame 11. The limiting structure 111 is used to restrict the phase lead welding end 310 to the position where it is attached to the phase copper busbar pin 121.
[0032] It should be noted that the stator winding 300 includes multi-phase windings, each of which includes multiple parallel branches. The phase lead welding end 310 refers to the beginning of each branch in the phase winding, and the star point lead welding end 320 refers to the end of each branch in the phase winding.
[0033] Specifically, the phase copper busbars 1 and star copper busbars 2 of the busbar assembly are spaced apart circumferentially along the stator winding 300, making the busbar assembly a split structure, meaning that the phase copper busbars 1 and star copper busbars 2 can be designed independently. Furthermore, the number of phase copper busbars 1 corresponds to the number of phase windings in the stator winding 300, while the number of star copper busbars 2 is typically set to one. For example, if the stator winding 300 includes three phase windings, then there are three phase copper busbars 1. Each phase copper busbar 1 includes an insulating frame 11 and a phase copper busbar body 12 disposed on the insulating frame 11. The insulating frames 11 of multiple phase copper busbars 1 can be separately arranged, meaning each phase copper busbar body 12 is equipped with an insulating frame 11; alternatively, the insulating frames 11 of multiple phase copper busbars 1 can be integrally formed, meaning multiple phase copper busbar bodies 12 share a single insulating frame 11. The phase busbar body 12 has multiple phase busbar pins 121, the number of which is the same as the number of phase lead welding ends 310 in the stator winding 300. The phase busbar pins 121 are typically welded to the phase lead welding ends 310 for a close fit. The star busbar 2 has multiple star busbar pins 211, the number of which is typically the sum of the number of all star lead welding ends 320 in the stator winding 300. The star busbar pins 211 are typically welded to the star lead welding ends 320 for a close fit. Furthermore, since the phase busbar 1 and star busbar 2 are spaced apart circumferentially along the stator winding 300, vibrations experienced by the phase busbar 1 are not transmitted to the star busbar 2, resulting in lower stress at each star busbar pin 211 on the star busbar 2. Furthermore, the insulating frame 11 is provided with a limiting structure 111 for restricting the phase lead welding end 310 to a position where it is in contact with the phase copper bus pin 121. The limiting structure 111 can be a limiting hole, a limiting groove, or a limiting protrusion, etc., which are not specifically limited here.
[0034] In this embodiment, the busbar assembly can be arranged with phase copper busbar 1 and star copper busbar 2 spaced apart along the circumference of the stator winding 300, making the busbar assembly a split structure. On the one hand, it is convenient for phase copper busbar 1 and star copper busbar 2 to be designed independently, and it is also convenient for the phase leads and star leads of the stator winding 300 to be designed separately, so that there is no need for additional insulation design and overall injection molding design for the phase leads and star leads, thereby reducing the envelope of the motor stator. On the other hand, it can prevent the vibration of the phase copper busbar 1 from being transmitted to the star copper busbar 2, thereby reducing the stress at the welding position of each star copper busbar pin 211 of the star copper busbar 2 and the welding end 320 of the star lead of the stator winding 300, thereby reducing the risk of vibration fracture of the stator winding 300 at the welding end 320 of the star lead. Furthermore, by arranging the phase copper busbar 1 and the star copper busbar 2 circumferentially along the stator winding 300, the spacing between the pins of the phase copper busbar 1 and the star copper busbar 2 can be increased, thereby improving the convenience of welding operations for each phase copper busbar 1 and the star copper busbar 2 and preventing short-circuit connections between them. At the same time, it can minimize the space occupied by the phase copper busbar 1 and the star copper busbar 2 in the radial direction along the stator winding 300. Moreover, by providing the insulating frame 11 only on the phase copper busbar 1 and placing the phase copper busbar body 12 of the phase copper busbar 1 on the insulating frame 11, and not on the star copper busbar 2, the mechanical structure of the busbar assembly can be simplified while using the insulating frame 11 to support the phase copper busbar body 12, thereby reducing production costs and weight. Furthermore, by setting a limiting structure 111 on the insulating frame 11, the phase lead welding end 310 of the stator winding 300 is fixed at the position where it is welded to the phase copper bus pin 121. This reduces the vibration force transmission and stress at the welding position between the phase copper bus pin 121 and the phase lead welding end 310, thereby reducing the risk of vibration fracture of the stator winding 300 at the phase lead welding end 310. This results in higher structural strength at the welding position between the busbar assembly and the stator winding 300, thus improving their vibration resistance at the welding position.
[0035] Furthermore, the insulating frame 11 is used to abut against the end face of the stator winding 300. Specifically, the insulating frame 11 typically abuts against the end face of the crown end of the stator winding 300. In this way, the insulating frame 11 can be supported by, for example, the crown end of the stator winding 300, to reduce the vibration amplitude of the phase copper busbar 1.
[0036] Furthermore, combined Figure 1 As shown, the star-point copper busbar 2 includes a star-point copper busbar body 21 and a wiring part 22. The star-point copper busbar body 21 is provided with star-point copper busbar pins 211, and the wiring part 22 is used to connect to the neutral wire of the three-phase power supply.
[0037] For a three-phase three-wire power supply, the three-phase power supply consists of three conductors, which are the phase lines of the three phases, suitable for high-voltage overhead lines in power systems. In this configuration, the three-phase power supply can be connected in a star or delta configuration, and there is no neutral line. For a three-phase four-wire power supply, the three-phase power supply includes four conductors: three phase lines and one neutral line (or zero line). This configuration is suitable for power systems with both three-phase and single-phase loads, providing a more stable power supply. The neutral line ensures that the single-phase load receives a stable voltage and balances the unbalanced current in the three-phase load. In this embodiment, by setting a connection part 22 on the star copper busbar 2, the busbar assembly can be used for both three-phase three-wire and three-phase four-wire power supplies, thereby improving the versatility of the busbar assembly.
[0038] Optionally, combined Figure 1 As shown, there are multiple phase copper busbars 1, and the multiple phase copper busbars 1 are respectively arranged to correspond to the multi-phase phase windings of the stator winding 300, and the insulating frame 11 of the multiple phase copper busbars 1 is integrally formed.
[0039] In this optional embodiment, the insulating frame 11 is an elongated strip structure extending circumferentially along the stator winding 300, that is, the circumferential direction of the stator winding 300 is also the length direction of the insulating frame 11, and, as Figure 5 As shown, multiple phase copper busbar bodies 12 are spaced apart on an insulating frame 11 along its length. This allows multiple phase copper busbar bodies 12 to share a single insulating frame 11, thereby reducing the number of parts, simplifying the installation process, and improving installation efficiency.
[0040] Optionally, combined Figure 2 and Figure 4 As shown, the limiting structure 111 is a limiting hole, which is used to insert the phase lead welding end 310, and the insulating frame 11 is bonded to the phase lead welding end 310 at the limiting hole.
[0041] In this optional embodiment, the limiting hole is provided through the insulating frame 11, and the center line of the limiting hole is parallel to the axial direction of the stator winding 300 through the insulating frame 11; the insulating frame 11 is generally provided with a plurality of limiting holes spaced apart circumferentially along the stator winding 300, and the number of limiting holes is consistent with the number of phase copper busbar pins 121 on the phase copper busbar body 12. During assembly, the phase lead welding end 310 of the stator winding 300 is welded from below the insulating frame 11 (i.e., Figure 2The phase lead wire (reverse direction of the Z-axis) passes through the corresponding limiting hole and is welded to the corresponding phase copper bus pin 121. By setting the limiting structure 111 as a limiting hole, the phase lead wire welding end 310 can pass through the limiting hole and be welded to the phase copper bus pin 121, improving the convenience of assembly operations. Furthermore, setting the limiting structure 111 as a limiting hole not only simplifies the structure of the insulating frame 11 but also reduces the material consumption of the insulating frame 11, lowering production costs. In addition, after the phase copper bus pin 121 and the phase lead wire welding end 310 are welded, adhesive is usually applied to the limiting hole to bond and fix the phase lead wire welding end 310 to the limiting hole of the insulating frame 11, further limiting the phase lead wire welding end 310 and also further improving the structural strength at the welding position between the phase copper bus 1 and the stator winding 300.
[0042] In other embodiments, the limiting structure 111 may also be a claw structure provided at the edge of the insulating frame 11, so as to use the claw structure to clamp and fix the phase lead welding end 310.
[0043] Optionally, combined Figure 6 As shown, the phase copper busbar pin 121 is located at the edge of the limiting hole and is parallel to the center line of the limiting hole. In this way, the phase lead welding end 310 of the stator winding 300 can be brought into contact with the phase copper busbar pin 121 after passing through the limiting hole, so that no operation such as bending is required to achieve contact. This simplifies the welding process between the phase lead welding end 310 and the phase copper busbar pin 121 and improves welding efficiency.
[0044] Optionally, combined Figure 5 As shown, the insulating frame 11 is also provided with a connecting groove 112. The opening of the connecting groove 112 is located on the side of the insulating frame 11 facing away from the stator winding 300, and two adjacent limiting holes are connected by the connecting groove 112. The connecting groove 112 extends circumferentially along the stator winding 300, and both ends of the connecting groove 112 along its extension direction are connected to two adjacent limiting holes respectively. In this way, when applying adhesive at the limiting holes, the adhesive can be dripped into the connecting groove 112 first, allowing the adhesive to flow from the connecting groove 112 into the limiting holes, thus improving the convenience of the adhesive application operation. At the same time, it also avoids the waste caused by the adhesive spreading along the upper surface of the insulating frame 11 when applying adhesive directly to the limiting holes.
[0045] Optionally, combined Figure 7 As shown, on the circumference of the stator winding 300, the central angle formed by the radius of the end of the insulating frame 11 away from the star copper busbar 2 and the radius of the end of the star copper busbar 2 away from the insulating frame 11 is less than 90°.
[0046] In this optional embodiment, the welding ends of the phase leads and star leads of the stator winding 300 are typically bent along the circumference of the stator winding 300, i.e., reverse-twisted, such as... Figure 3 As shown, this shortens the axial dimension of the winding ends, reduces the envelope of the motor stator, and simultaneously reduces the included angle between the phase lead welding ends 310 and the star lead welding ends 320 from 120° to within 90°, for example, to 86°. That is, before the welding ends of the phase leads and star leads of the stator winding 300 are bent, the welding ends of the phase leads and star leads are typically distributed within an included angle of 120°, while after the welding ends of the phase leads and star leads are bent, the welding ends of the phase leads and star leads can be distributed within an included angle of, for example, 86°. Based on this, in this embodiment, the central angle formed by the radius of the end of the insulating frame 11 away from the star copper busbar 2 and the radius of the end of the star copper busbar 2 away from the insulating frame 11 is set to be less than 90°, that is, the central angle α occupied by the phase copper busbar 1 and the star copper busbar 2 along the circumference of the stator winding 300 is less than 90°. Figure 7 As shown, this not only satisfies the connection requirements of phase copper busbar 1 and star copper busbar 2 with the welding ends of phase leads and star leads, but also reduces the circumferential dimensions of the busbar assembly in the stator winding 300, thereby reducing the space occupied and production cost of the busbar assembly.
[0047] Furthermore, combined Figure 6 As shown, the phase copper bus body 12 and the insulating frame 11 are integrally injection molded.
[0048] In this embodiment, the insulating frame 11 is typically made of a long strip of plastic, and the phase copper bus body 12 and the insulating frame 11 are integrally injection molded. Specifically, the fabricated phase copper bus body 12 is placed into the injection mold of the insulating frame 11, and then the injection molding material used to manufacture the insulating frame 11 is added to the injection mold for injection molding, ensuring that the material completely covers the portion of the phase copper bus body 12 placed inside the injection mold. After cooling and solidification, the phase copper bus body 12 and the insulating frame 11 are integrated into a single unit. This reduces the number of parts, simplifies the installation process, improves installation efficiency, and lowers costs.
[0049] Optionally, combined Figure 4 As shown, the insulating frame 11 has a first limiting boss 113 on the side facing the stator winding 300. The first limiting boss 113 is used to be inserted into the end gap of the stator winding 300.
[0050] In this optional embodiment, the busbar assembly is typically located at the crown end of the stator winding 300, while the first limiting boss 113 is located on the side of the insulating frame 11 facing the crown end of the stator winding 300 and is used to insert into the gap at the crown end. This makes the phase busbar 1 more closely attached to the end face of the stator winding 300. When the end of the stator winding 300 is dripped with insulating varnish, the insulating varnish can fill the gap at the first limiting boss 113 under capillary action, thereby bonding the insulating frame 11 to the end of the stator winding 300. This allows the insulating frame 11 to firmly fix the phase busbar body 12 to the end surface of the stator winding 300, improving the overall rigidity and reliability of the phase busbar 1. Furthermore, it can reduce the vibration amplitude of the phase busbar 1 and prevent vibration breakage at the welding position between the phase busbar 1 and the stator winding 300.
[0051] Optionally, combined Figure 1 and Figure 4 As shown, the phase copper busbar 1 also includes a connecting wire 13 and a terminal block 14. One end of the connecting wire 13 is connected to the phase copper busbar body 12, and the other end is connected to the terminal block 14. The terminal block 14 is provided with a connecting hole 141 and a second limiting boss 142. The terminal block 14 is used to connect to the phase line of the external power supply through a fastener at the connecting hole 141. The second limiting boss 142 is arranged around the connecting hole 141 and is used to limit the rotation of the terminal block 14 relative to the phase line of the external power supply.
[0052] In this optional embodiment, the terminal block 14 is provided with a connection hole 141, and correspondingly, the phase wire terminal of the external power supply is provided with a bolt hole. The terminal block 14 is connected to the phase wire of the external power supply at the connection hole 141 by bolts. The terminal block 14 is also provided with a second limiting boss 142. Multiple smaller second limiting bosses 142 can be provided around the connection hole 141, or a single arc-shaped second limiting boss 142 can be provided around the connection hole 141. This allows the second limiting boss 142 around the connection hole 141 to clamp the phase wire terminal of the external power supply during bolt tightening, thereby limiting the terminal block 14 and preventing relative rotation of the terminal block 14 with respect to the external power supply cable, ensuring the stability of the connection between the two.
[0053] Furthermore, the second limiting boss 142 is disposed at the edge of the terminal block 14. This facilitates the formation of the second limiting boss 142 by bending, thereby improving the ease of processing the second limiting boss 142.
[0054] The present invention provides an electric motor including a stator winding 300 and a busbar assembly as described above. The busbar assembly is disposed at one end of the stator winding 300, and the phase copper busbar 1 of the busbar assembly is attached to the phase lead welding end 310 of the stator winding 300, and the star copper busbar 2 of the busbar assembly is attached to the star lead welding end 320 of the stator winding.
[0055] In this embodiment, the phase leads and star leads of the stator winding 300 are typically located at the crown end of the stator winding 300, and the busbar assembly is also located at the crown end of the stator winding 300. The phase busbar pins 121 of the phase busbar 1 are typically welded to the phase lead welding ends 310 of the stator winding 300 to achieve a close connection, thereby realizing current transmission; the star busbar pins 211 of the star busbar 2 are typically welded to the star lead welding ends 320 of the stator winding 300 to achieve a close connection, thereby realizing current transmission.
[0056] Furthermore, 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.
[0057] This utility model provides a vehicle that includes the busbar assembly described above, or the motor described above.
[0058] The beneficial effects of the vehicle in this embodiment are the same as those of the busbar assembly described above, and will not be repeated here.
[0059] Although the present invention has been disclosed above, its protection scope 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 protection scope of the present invention.
Claims
1. A bus assembly, characterized in that, The system includes phase copper busbars (1) and star copper busbars (2) arranged circumferentially along the stator winding (300). The phase copper busbars (1) include an insulating frame (11) and a phase copper busbar body (12) disposed on the insulating frame (11). The phase copper busbar pins (121) of the phase copper busbar body (12) are used to be attached to the phase lead welding end (310) of the stator winding (300). The star copper busbar pins (211) of the star copper busbars (2) are used to be attached to the star lead welding end (320) of the stator winding (300). The insulating frame (11) is provided with a limiting structure (111) for limiting the phase lead welding end (310) to a position where it is attached to the phase copper busbar pin (121).
2. The bus assembly according to claim 1, characterized in that, The limiting structure (111) is a limiting hole, which is used to insert the phase lead welding end (310), and the insulating skeleton (11) is bonded to the phase lead welding end (310) at the limiting hole.
3. The bus assembly according to claim 2, characterized in that, The insulating frame (11) is also provided with a connecting groove (112). The opening of the connecting groove (112) is located on the side of the insulating frame (11) away from the stator winding (300), and two adjacent limiting holes are connected through the connecting groove (112).
4. The bus assembly according to claim 2, characterized in that, The phase copper busbar pin (121) is located at the edge of the limiting hole and is set parallel to the center line of the limiting hole.
5. The bus assembly according to claim 1, characterized in that, The phase copper busbar (1) is provided in multiple ways, and the multiple phase copper busbars (1) are respectively arranged corresponding to the multi-phase phase windings of the stator winding (300), and the insulating frame (11) of the multiple phase copper busbars (1) is integrally formed.
6. The bus assembly according to claim 1, characterized in that, On the circumference of the stator winding (300), the central angle formed by the radius of the end of the insulating frame (11) away from the star copper busbar (2) and the radius of the end of the star copper busbar (2) away from the insulating frame (11) is less than 90°.
7. The bus assembly according to claim 1, characterized in that, The insulating frame (11) is provided with a first limiting boss (113) on the side facing the stator winding (300), and the first limiting boss (113) is used to be inserted into the end gap of the stator winding (300).
8. The bus assembly according to claim 1, characterized in that, The phase copper busbar (1) also includes a connecting wire (13) and a terminal block (14). One end of the connecting wire (13) is connected to the phase copper busbar body (12), and the other end is connected to the terminal block (14). The terminal block (14) is provided with a connecting hole (141) and a second limiting boss (142). The terminal block (14) is used to connect to the phase line of an external power source at the connecting hole (141) by a fastener. The second limiting boss (142) is arranged around the connecting hole (141) and is used to restrict the terminal block (14) from rotating relative to the phase line of the external power source.
9. An electric motor, characterized in that, The busbar assembly includes a stator winding (300) and a busbar assembly as described in any one of claims 1-8. The busbar assembly is disposed at one end of the stator winding (300), and the phase copper busbar (1) of the busbar assembly is bonded to the phase lead welding end (310) of the stator winding (300), and the star copper busbar (2) of the busbar assembly is bonded to the star lead welding end (320) of the stator winding.
10. A vehicle, characterized in that, It includes the bus assembly as described in any one of claims 1-8, or the motor as described in claim 9.