Motor stator, motor, electric driving system and vehicle

Abstract

The utility model relates to a motor stator, a motor, an electric driving system and a vehicle, and the motor stator comprises an annular connection part and a stator core which are stacked in the axial direction. The inner circumferential wall of the stator core is provided with stator grooves along the axial direction, and each stator groove is provided with a copper bar in a penetrating manner. And the annular connecting part is integrated with a connecting line connected with the copper bar. According to the arrangement of the motor stator, typical connection between the end parts of the copper bars is realized through the annular connecting parts, so that the processing and assembling processes of the motor stator can be simplified, the cost is reduced, the production efficiency is improved, and meanwhile, the overall size of the motor stator can be reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to an electric motor stator, an electric motor, an electric drive system, and a vehicle. Background Technology

[0002] The motor stator includes a stator core and copper busbars. The inner circumferential wall of the stator core has stator slots along the axial direction. The copper busbars pass through these slots, with each end extending beyond the slot. The ends of the copper busbars are welded together at the welding end and connected at the crown end by hairpins. This results in a significant length of the copper busbars extending beyond the stator core, leading to a large axial length, a large space requirement, and high copper consumption and cost. Furthermore, the hairpin design makes the machining and assembly process of this motor stator complex, resulting in a long production cycle and low production efficiency.

[0003] Therefore, how to simplify the processing and assembly of motor stators, reduce costs, improve production efficiency, and at the same time reduce the overall size of the motor stator is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a motor stator, a motor, an electric drive system, and a vehicle that can simplify the processing and assembly of the motor stator, reduce costs, improve production efficiency, and reduce the overall size of the motor stator.

[0005] To solve the above-mentioned technical problems, this application provides a motor stator, including an annular connecting part and a stator core stacked along the axial direction; the inner peripheral wall of the stator core is provided with stator slots along the axial direction, and each stator slot is provided with a copper busbar; the annular connecting part integrates a connecting line connected to the copper busbar.

[0006] Optionally, there are two annular connecting parts, namely a first annular connecting part and a second annular connecting part. The first annular connecting part and the second annular connecting part are respectively disposed at both ends of the axial direction of the stator core. The first annular connecting part is provided with a first connecting line, and the second annular connecting part is provided with a second connecting line.

[0007] Optionally, the first annular connecting portion and the second annular connecting portion are respectively provided with marking structures along the circumferential direction, and in the installed state, the marking structures of the first annular connecting portion and the marking structures of the second annular connecting portion are aligned.

[0008] Optionally, some of the copper busbars may have an extension section along the length direction at one end facing the first annular connection portion, and the extension section forms a three-phase lead.

[0009] Optionally, the annular connecting portion includes a connecting plate and a printed circuit disposed on the connecting plate, the printed circuit forming the connecting line;

[0010] Alternatively, the annular connection portion includes a connecting plate and a connecting wire harness disposed on the connecting plate, the connecting wire harness forming the connection line.

[0011] Optionally, the connection line is located on the side surface of the annular connection portion facing the stator core.

[0012] Optionally, the connecting plate includes at least two plate structures, each of which is stacked and fixed, and the connecting line is sandwiched between the plate structures; or, the connecting plate and the connecting line are integrally injection molded and the connecting line is located inside the connecting plate.

[0013] Optionally, the annular connecting part is further provided with connecting holes corresponding to each of the copper busbars, and the connecting line is connected to a connector corresponding to each of the connecting holes; the end of the copper busbar is inserted into the connecting hole and electrically connected to the connector.

[0014] Optionally, the end of the copper busbar is inserted into the connecting hole and welded to the connector for fixation.

[0015] Optionally, the connecting hole is provided with a corresponding connector on one side of the stator core along the circumferential direction, and the connectors corresponding to two adjacent connecting holes are staggered along the radial direction of the stator core.

[0016] Optionally, the stator core is further provided with a countersunk hole communicating with the connecting hole, and at least one of the two adjacent joints arranged along the radial direction of the stator core is located in the countersunk hole.

[0017] Optionally, the end of the copper busbar is inserted into the connecting hole and engaged with the connecting part for fixation.

[0018] Optionally, the annular connection portion is further provided with a sensor element electrically connected to the connection line, the sensor element including at least one of a temperature sensor, an oil temperature sensor, a current sensor, and a voltage sensor.

[0019] This application also provides an electric motor, including the motor stator as described above.

[0020] This application also provides an electric drive system, including the motor described above.

[0021] This application also provides a vehicle including the electric drive system described above.

[0022] The motor stator, motor, electric drive system, and vehicle provided in this application have the following technical advantages compared to the prior art:

[0023] The ends of the copper busbars extend out of the stator slots and are electrically connected to the connecting lines integrated into the annular connection part. This eliminates the need to connect the copper busbars to each other using methods such as hairpin connections, thus simplifying the overall structure and assembly process.

[0024] Furthermore, since the ends of the copper busbars only need to be electrically connected to the connecting lines, there is no need to set up hairpins or other structures between the copper busbars to achieve the connection. This can greatly reduce the length of the copper busbar ends extending out of the stator slot, thereby greatly reducing the overall axial length of the motor stator, reducing the overall volume of the motor stator, and reducing the requirements for installation space.

[0025] In addition, since the copper busbars do not need to be connected through a hairpin structure, there is no need for complicated processing techniques such as making hairpins, inserting hairpins, twisting heads, cutting heads, and coating. This simplifies the processing and assembly process of the motor stator, shortens the processing and manufacturing cycle of the motor stator, improves product production efficiency, facilitates modular decoupled production, and reduces after-sales maintenance costs.

[0026] Each copper busbar has a linear structure, which greatly reduces the variety of copper busbar structures, making it suitable for mass production and effectively reducing production costs. Furthermore, the stator core and copper busbars form the stator assembly. This stator assembly and connecting parts are assembled separately and then as a whole. If a stator assembly or connecting part malfunctions and requires repair or replacement, only the faulty part needs to be repaired or replaced, eliminating the need for complete replacement and thus reducing repair and replacement costs.

[0027] Specifically, the connection relationship between the copper busbars of the motor stator is well known to those skilled in the art. In the prior art, the copper busbars are directly connected through contact between them. The motor stator provided in this application does not change the connection relationship between the copper busbars; instead, it connects them through annular connecting parts. The connection lines of the annular connecting parts can be designed according to the connection relationship of the copper busbars in the motor stator, and can be designed based on the connection relationship at the ends of each copper busbar. The motor stator provided in this application reduces the overall axial length and volume of the motor stator by changing the connection method between the copper busbars, while also reducing copper usage and improving economy. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the motor stator provided in the embodiment of this application;

[0029] Figure 2 yes Figure 1 The main view;

[0030] Figure 3 yes Figure 1 A schematic diagram of the stator core and copper busbar in the installed state;

[0031] Figure 4 yes Figure 1 A schematic diagram of the annular connecting part.

[0032] Appendix Figures 1-4 The reference numerals in the attached figures are explained as follows:

[0033] 1 stator core, 11 stator slots;

[0034] 2 copper busbars;

[0035] 3. Annular connecting part; 31. First annular connecting part; 32. Second annular connecting part; 33. Connecting plate; 34. Connecting hole; 35. Connector;

[0036] 4. Insulating components;

[0037] 5. Three-phase leads. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] The existing motor stator includes a stator core 1 and copper busbars 2. The stator core 1 is a cylindrical structure made of multiple silicon steel sheets stacked together. The inner circumferential wall of the stator core 1 is provided with stator slots 11 running through it along the axial direction. Each stator slot 11 is provided with a copper busbar 2. The outer wall of the copper busbar 2 is wrapped with an insulating component 4. Along the axial direction of the stator core 1, one end of each copper busbar 2 is connected by welding to form a welded end, and the other end of each copper busbar 2 is connected by hairpins to form a crown end. In order to achieve the connection, the two ends of the copper busbar 2 need to extend a long length beyond the stator slot 11, which results in copper waste and high cost. In addition, the overall axial length of the motor stator from the welded end to the crown end is long, the overall volume is large, and the requirements for installation space are high.

[0040] Therefore, this application provides a motor stator whose structure is improved and optimized, simplifying the processing and assembly of the motor stator, improving production efficiency, saving copper usage, reducing copper waste and lowering costs, and reducing the axial length of the motor stator, thereby reducing the overall size of the motor and lowering the requirements for installation space. Furthermore, the reduced copper usage effectively reduces copper losses, thus contributing to improved motor efficiency.

[0041] Specifically, such as Figure 1 and Figure 2As shown, the motor stator includes a stator core 1, a copper busbar 2, and an annular connecting part 3. The annular connecting part 3 has an annular structure and is located at the axial end of the stator core 1. The annular connecting part 3 integrates a connecting line that connects to the copper busbar 2.

[0042] The copper busbar 2 passes through the stator slot 11. In this embodiment, the cross-section of the copper busbar 2 is preferably square, and the cross-section of the stator slot is also square. Therefore, setting the cross-section of the copper busbar 2 to a square structure can achieve a larger stator slot 11 filling rate compared to setting it to a circular structure.

[0043] The end of the copper busbar 2 extends out of the stator slot 11 and is electrically connected to the connecting line integrated in the annular connecting part 3. There is no need to connect the copper busbars 2 to each other through hairpin connection or other means, which simplifies the overall structure and assembly process.

[0044] Furthermore, since the ends of the copper busbar 2 only need to be electrically connected to the connecting lines, there is no need to set up structures such as hairpins between the copper busbars 2 to achieve the connection. This can greatly reduce the length of the ends of the copper busbar 2 extending out of the stator slot 11, thereby greatly reducing the overall axial length of the motor stator, reducing the overall volume of the motor stator, and reducing the requirements for installation space.

[0045] In addition, since the copper busbar 2 does not need to be connected through a hairpin structure, there is no need for complicated processing techniques such as making hairpins, inserting hairpins, twisting heads, cutting heads and coating. This simplifies the processing and assembly process of the motor stator, shortens the processing and manufacturing cycle of the motor stator, improves product production efficiency, facilitates modular decoupled production, and reduces after-sales maintenance costs.

[0046] Each copper busbar 2 has a linear structure, which greatly reduces the variety of structural types of copper busbar 2, making it suitable for mass production and effectively reducing production costs. Furthermore, the stator core 1 and the copper busbar 2 form a structure as follows: Figure 3 The stator component shown can be assembled separately from the annular connecting part 3, and then assembled as a whole. If the stator component or the annular connecting part 3 malfunctions and needs to be repaired or replaced, only the malfunctioning part needs to be repaired or replaced, without the need for the whole component to be replaced, thereby reducing the cost of repair and replacement.

[0047] In this embodiment, the specific structure of the annular connecting part 3 is not limited, and can be set according to the actual situation.

[0048] like Figure 4As shown, the annular connecting part 3 is provided with connecting holes 34 along the axial direction. The number of connecting holes 34 is the same as the number of copper busbars 2, and each connecting hole 34 corresponds to each copper busbar 2. The connecting line is provided with connectors 35 corresponding to each connecting hole 34. That is to say, each connector 35 is electrically connected through the connecting line. The end of the copper busbar 2 extends out of the stator slot 11 and is inserted into the corresponding connecting hole 34 of the annular connecting part 3. After the end of the copper busbar 2 is fully inserted into the connecting hole 34, the copper busbar 2 can be electrically connected to the corresponding connector 35, thereby enabling each copper busbar 2 to be electrically connected through the connecting line provided in the annular connecting part 3. The end of the copper busbar 2 only needs to be inserted into the corresponding connecting hole 34 to achieve electrical connection with the corresponding connector 35, reducing the length of the end of the copper busbar 2 extending out of the stator slot 11, thereby greatly reducing the overall axial length of the motor stator, reducing the overall volume of the motor stator, and reducing the requirements for installation space.

[0049] Of course, in this embodiment, the copper busbar 2 can also be directly welded to the connector 35 of the connecting line to achieve electrical connection. The annular connecting part 3 is provided with a connecting hole 34. The end of the copper busbar 2 is inserted into the connecting hole 34 to be electrically connected to the corresponding connector 35. This makes the overall structure more regular, avoids messy connections, facilitates maintenance, and also avoids short circuits between the copper busbars 2, simplifying the connection operation.

[0050] like Figure 4 As shown, the annular connecting part 3 includes a connecting plate 33, which has an annular structure and is coaxially arranged with the stator core 1. The connecting plate 33 is made of insulating material and has the aforementioned connecting lines. Specifically, the connecting plate 33 may have the connecting lines printed on it, meaning that the annular connecting part 3 is equivalent to a complete printed circuit board. Alternatively, the connecting plate 33 may simply be a carrier, with the printed circuit board fixed to it. The connecting lines are formed by printing etchant, which facilitates mass production.

[0051] Alternatively, the connecting plate 33 can be equipped with connecting wire harnesses, which connect the connectors 35 electrically to form the aforementioned connection lines. This arrangement reduces production costs and offers good layout flexibility.

[0052] In this embodiment, the connecting lines are placed on the surface of the annular connecting part 3 facing the stator core 1 to avoid exposing the connecting lines. This ensures that the overall structure is relatively neat while also providing protection for the connecting lines.

[0053] Alternatively, the connecting lines can be placed inside the annular connecting part 3 to ensure that the overall structure of the motor stator is more regular, while also providing protection for the connecting lines to avoid damage caused by collisions with external structures, thereby ensuring connection stability.

[0054] When the connecting line is located inside the connecting plate 33, the connecting plate 33 can be configured to include at least two plate structures, with each plate structure stacked and fixed, and the connecting line located between the two plate structures. Alternatively, the connecting plate 33 can be made of plastic and injection molded, and the connecting line can be integrally injection molded with the connecting plate 33, so that the connecting line is located inside the plate structure.

[0055] The connecting plate 33 may also have a supporting protrusion along its circumferential direction on the side facing the stator core 1. This supporting protrusion is made of insulating material and can be integrally formed with the connecting plate 33, or it can be an independent structure fixed by bonding or other methods. Specifically, the supporting protrusion can be a continuous strip-shaped supporting protrusion along the circumferential direction of the connecting plate 33, or the connecting plate 33 can have at least three spaced protrusions along its circumferential direction. The supporting protrusion provides support between the annular connecting part 3 and the stator core 1, ensuring the structural stability of the motor stator in the assembled state.

[0056] Furthermore, there is no restriction on the height of the support protrusion along the axial direction of the stator core 1, as long as the height of the support protrusions set along the circumferential direction is consistent.

[0057] Of course, in this embodiment, the support protrusion can be omitted, and the end of the copper busbar 2 can be inserted into the connecting hole 34 and fixed to the connecting plate 33, thus achieving the fixation between the annular connecting part 3 and the stator core and the copper busbar 2. The support protrusion, on the other hand, does not limit the fixing method between the copper busbar and the annular connecting part 3, improving installation flexibility.

[0058] The end of the copper busbar 2 is inserted into the connection hole 34 and can be fixed to the connection part 3 by snap-fit. That is, the connection plate 33 is provided with a first snap-fit ​​structure, and the end of the copper busbar 2 is provided with a second snap-fit ​​structure. After the end of the copper busbar 2 is inserted into the connection hole 34, it can be fixed by snap-fitting the first snap-fit ​​structure and the second snap-fit ​​structure. In the fixed state, the end of the copper busbar 2 can also be electrically connected to the connector 35.

[0059] In this embodiment, there are no specific limitations on the specific structure of the first and second snap-fit ​​structures. For example, the first snap-fit ​​structure can be a slot on the inner peripheral wall of the connecting hole 34, and the second snap-fit ​​structure can be a protrusion on the outer peripheral wall of the end of the copper busbar 2. Alternatively, the first snap-fit ​​structure can be a protrusion on the inner peripheral wall of the connecting hole 34, and the second snap-fit ​​structure can be a slot on the outer peripheral wall of the end of the copper busbar 2. When the end of the copper busbar 2 is inserted into the connecting hole 34, the protrusion can be inserted into the slot and restrict the copper busbar 2 from moving relative to the connecting plate 33 along its length direction, thereby realizing the connection and fixation between the copper busbar 2 and the connecting plate 33. With this setting, the structure is simple and the installation operation is relatively convenient.

[0060] When the connecting plate 33 is provided with a support protrusion, the end of the copper busbar 2 can also be provided with a locking protrusion to form a second locking structure. After the end of the copper busbar 2 passes through the connecting hole 34, the locking protrusion can abut against the end face of the connecting plate 33. The surface of the connecting plate 33 can restrict the locking protrusion from moving toward the stator core 1 and form the first locking structure mentioned above. That is, the surface of the connecting plate 33 and the locking protrusion restrict the connecting plate 33 from moving away from the stator core 1 relative to the copper busbar 2, while the supporting effect of the support protrusion can restrict the connecting plate 33 from moving toward the stator core 1 relative to the copper busbar 2, thereby ensuring the stability of the connecting plate 33 and the copper busbar 2 in the axial direction of the stator core 1.

[0061] Alternatively, in this embodiment, after the end of the copper busbar 2 passes through the mounting hole, the operator can fix the copper busbar 2 and the connector 35 by welding and achieve electrical connection. This can ensure the installation stability between the copper busbar 2 and the annular connecting part 3, and also ensure the stability and reliability of the electrical connection between the copper busbar 2 and the connector 35.

[0062] As shown in Figure 3, multiple copper busbars 2 are arranged in parallel along the radial direction of the stator core 1, and correspondingly, as shown in Figure 3. Figure 4 As shown, the annular connecting part 3 is provided with a plurality of parallel connecting holes 34 in the radial direction. When the copper busbar 2 and the connector 35 are connected by welding, the structure is located on the left or right side of the connecting hole 34. "Left side" and "right side" refer to the two opposite sides of the connecting hole 34 in the circumferential direction.

[0063] Along the radial direction of the stator core 1, the connectors 35 corresponding to two adjacent connecting holes 34 are staggered. That is, in a row of connecting holes 34 arranged radially, one connector 35 corresponding to two adjacent connecting holes 34 is located on the left side of the connecting hole 34, and the other connector 35 is located on the right side of the connecting hole 34. With this arrangement, when welding the copper busbar 2 and the connector 35, there is a gap of one copper busbar 2 thickness between two adjacent welding points on the same side of the connecting hole 34, reducing the probability of short circuit caused by overlapping with adjacent copper busbar 2 or connector 35 when welding a copper busbar 2 and connector 35.

[0064] Alternatively, the connecting plate 33 can be provided with a countersunk hole that communicates with the connecting hole 34. Among two adjacent joints 35 along the radial direction of the stator core 1, at least one joint 35 is located in the countersunk hole, so that the welding position between the joint 35 and the corresponding copper busbar 2 is located in the countersunk hole, avoiding the situation of short circuit caused by overlapping with the adjacent copper busbar 2 or joint 35.

[0065] Specifically, for ease of explanation, two adjacent joints 35 along the radial direction of the stator core 1 are referred to as the first joint and the second joint, respectively. The connecting plate 33 is provided with a first countersunk hole corresponding to the first joint, and the second joint is located on the surface of the connecting plate 33. When the first joint is welded to the corresponding copper busbar 2, the welding point is inside the first countersunk hole. When the second joint is welded to another copper busbar 2, the welding point is on the surface of the connecting plate 33. Due to the different positions of the welding points, the overlap between the two welding points can be avoided, thereby avoiding short circuits.

[0066] Alternatively, the connecting plate 33 may also be provided with a second countersunk hole corresponding to the second connector. The first countersunk hole and the second countersunk hole are not connected and are separated from each other. The two welding points are in different countersunk holes, which can also avoid the situation of overlapping between welding points, thereby avoiding short circuits.

[0067] When all the connectors 35 corresponding to each connecting hole 34 are located on the same side, the connecting holes 34 corresponding to the first connector and the connecting holes 34 corresponding to the second connector are arranged adjacent to each other, such as... Figure 4 As shown, when the connectors 35 corresponding to two adjacent connection holes 34 are staggered, the connection holes 34 corresponding to the first connector and the connection holes 34 corresponding to the second connector are arranged at intervals.

[0068] In this embodiment, preferably, there are two annular connecting parts 3. These two annular connecting parts 3 are the first annular connecting part 31 and the second annular connecting part 32, respectively. The first annular connecting part 31 and the second annular connecting part 32 are respectively provided at both ends of the axial direction of the stator core 1. That is, the first annular connecting part 31, the stator core 1 and the second annular connecting part 32 are stacked sequentially along the axial direction.

[0069] Specifically, during installation, the stator core 1 and copper busbar 2 are assembled such that both ends of the copper busbar 2 extend a certain length from both ends of the stator slot 11 to form a stator component. At the same time, the first annular connecting part 31 and the second annular connecting part 32 are also prepared separately. Then, the stator component, the first annular connecting part 31 and the second annular connecting part 32 are assembled so that the ends of the copper busbar 2 pass through the corresponding connecting holes 34 and are fixed. The installation operation is relatively convenient and can effectively improve the assembly efficiency of the motor stator, thereby improving the production efficiency of the motor.

[0070] Of course, in this embodiment, the annular connecting part 3 can also be provided only at one end of the stator core 1, such as only at the welding end, or only at the crown end, while the first annular connecting part 31 and the second annular connecting part 32 are provided at the same time, which can be more conducive to simplifying the overall structure of the motor stator, reducing the axial length and overall volume of the motor stator, reducing the amount of copper used and reducing costs.

[0071] like Figure 1 and Figure 2 As shown, the first annular connecting part 31 is located at the welding end of the motor stator, and the second annular connecting part 32 is located at the crown end of the motor stator. The first annular connecting part 31 is also provided with three-phase lead wires 5. Specifically, a portion of the copper busbar 2 has an extension on one side facing the first annular connecting part 31, and the three-phase lead wires 5 are formed through the extension. Alternatively, the copper busbar 2 may not have an extension, and the three-phase lead wires 5 can be directly fixed to the first annular connecting part 31 and electrically connected to the connection line of the first annular connecting part 31. When the three-phase lead wires 5 are formed through the extension of the copper busbar 2, the overall structure can be simplified, and the assembly operation of the motor stator can be simplified, effectively improving production efficiency.

[0072] The first annular connecting part 31 is provided with a first connecting line, and the second annular connecting part 32 is provided with a second connecting line. Specifically, the connection relationship between the copper busbars 2 of the motor stator is well known to those skilled in the art. In the prior art, the copper busbars 2 are directly connected through contact between them. In the motor stator provided in this embodiment, the connection relationship between the copper busbars 2 is not changed, but the copper busbars 2 are connected through the annular connecting part 3. The connecting lines and connectors 35 of the annular connecting part 3 can be designed according to the connection relationship of the copper busbars 2 of the motor stator. The first connecting line of the first annular connecting part 31 is designed according to the connection relationship of the welded ends of the copper busbars 2, and the second connecting line of the second annular connecting part 32 is designed according to the connection relationship of the crown ends of the copper busbars 2. The motor stator provided in this embodiment reduces the overall axial length and volume of the motor stator by changing the connection method between the copper busbars 2, and also reduces the amount of copper used and improves economy.

[0073] The first connecting plate of the first annular connecting part 31 and the second connecting plate of the second annular connecting part 32 are respectively provided with corresponding marking structures. During installation, the marking structures of the first connecting plate and the second connecting plate are aligned to ensure that the connection relationship of each copper busbar 2 is correct in the installation state.

[0074] Specifically, in this embodiment, there are no restrictions on the marking structure. It can be a scribing, a scratch, a pointer, a protrusion, etc., and the marking structures of the first connecting plate 33 and the second connecting plate 33 can be the same or different.

[0075] In addition, in this embodiment, the annular connecting part 3 may also be provided with sensor elements, including but not limited to at least one of temperature sensor, oil temperature sensor, current sensor, and voltage sensor. The temperature sensor is used to detect the temperature of the motor stator in the working state, the oil temperature sensor is used to detect the oil temperature, the current sensor is used to detect the current passing through, and the voltage sensor is used to detect the voltage. The sensor elements are electrically connected to the connecting lines and can also be connected to the signal of an external device controller to monitor the status of the motor stator.

[0076] This application also provides an electric motor, an electric drive system, and a vehicle. The vehicle includes an electric drive system, the electric drive system includes an electric motor, and the electric motor includes the aforementioned motor stator. The specific technical effects are similar to those of the aforementioned motor stator, and will not be repeated here for the sake of brevity.

[0077] In the description of this application, it should be understood that the terms "left", "right", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0079] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An electric machine stator, characterized in that, The annular connecting part (3) and the stator core (1) are arranged in an axial direction; The inner circumferential wall of the stator core (1) is provided with stator slots (11) in the axial direction, and each stator slot (11) is provided with a copper bar (2); The annular connecting part (3) is integrated with a connecting line connected with the copper bar (2).

2. The motor stator of claim 1, wherein, The number of the annular connecting part (3) is two, and the two annular connecting parts (3) are respectively a first annular connecting part (31) and a second annular connecting part (32), the first annular connecting part (31) and the second annular connecting part (32) are respectively arranged at the axial two ends of the stator core (1), the first annular connecting part (31) is provided with a first connecting line, and the second annular connecting part (32) is provided with a second connecting line.

3. The motor stator of claim 2, wherein, The first annular connecting part (31) and the second annular connecting part (32) are respectively provided with a mark structure in the circumferential direction, and the mark structure of the first annular connecting part (31) and the mark structure of the second annular connecting part (32) are aligned in the installed state.

4. The motor stator of claim 2, wherein, Part of the copper bar (2) is further provided with an extension section in the length direction of the side end facing the first annular connecting part (31), and the extension section forms a three-phase lead-out wire (5).

5. The motor stator of any one of claims 1-4, wherein, The annular connecting part (3) comprises a connecting plate (33) and a printed circuit arranged on the connecting plate (33), and the printed circuit forms the connecting line; Alternatively, the annular connecting part (3) comprises a connecting plate (33) and a connecting wire harness arranged on the connecting plate (33), and the connecting wire harness forms the connecting line.

6. The motor stator of any one of claims 1-4, wherein, The connecting line is arranged on the side surface of the annular connecting part (3) facing the stator core (1).

7. The motor stator of claim 5, wherein, The connecting plate (33) comprises at least two layers of plate structures, each plate structure is arranged in a stacked manner and is fixed, and the connecting line is clamped between the plate structures, or the connecting plate (33) is integrally injection molded with the connecting line and the connecting line is located in the connecting plate (33).

8. The motor stator of any one of claims 1-4, wherein, The annular connecting part (3) is further provided with a connecting hole (34) corresponding to each copper bar (2), and the connecting line is connected with a joint (35) corresponding to each connecting hole (34); The end of the copper bar (2) is inserted into the connecting hole (34) and electrically connected with the joint (35).

9. The motor stator of claim 8, wherein, The end of the copper bar (2) is inserted into the connecting hole (34) and welded with the joint (35).

10. The motor stator of claim 9, wherein, The connecting hole (34) is provided with a corresponding joint (35) at one end in the circumferential direction of the stator core (1), and in the radial direction of the stator core (1), the joints (35) corresponding to the adjacent two connecting holes (34) are arranged in a staggered manner.

11. The motor stator of claim 9, wherein, The stator core (1) is further provided with a counterbore in communication with the connecting hole (34), and in the radial direction of the stator core (1), at least one joint (35) is located in the counterbore.

12. The motor stator of claim 8, wherein, The end of the copper bar (2) is inserted into the connecting hole (34) and clamped with the connecting part (3).

13. The motor stator of any one of claims 1-4, wherein, The annular connecting part (3) is further provided with a sensor element electrically connected with the connecting line, the sensor element comprising at least one of a temperature sensor, an oil temperature sensor, a current sensor, and a voltage sensor.

14. An electric machine characterized by An electric machine comprising a stator according to any one of claims 1-13.

15. An electric drive system, characterized by An electric machine according to claim 14.

16. A vehicle characterized by comprising: An electric drive system according to claim 15.

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