Electronic water pump, thermal management system and vehicle

Abstract

The utility model discloses an electronic water pump, thermal management system and vehicle, electronic water pump includes casing and stator subassembly, the stator subassembly includes stator core, insulation support and stator winding, the insulation support is injection molded part and is injection molded and wrapped the stator core, the stator winding is installed on the insulation support, casing is injection molded part and is injection molded and wrapped the stator subassembly, the stator winding is installed on the insulation support. At least one first positioning groove is formed in the peripheral wall of the stator core, at least part of the first positioning groove is exposed out of the insulating support, the casing wraps the first positioning groove, at least one second positioning groove is formed in the peripheral wall of the insulating support, at least part of the second positioning groove is exposed out of the casing, and the casing wraps the second positioning groove. The second positioning grooves and the first positioning grooves are arranged in a staggered mode in the axial direction and / or the circumferential direction. Therefore, the positioning precision of the stator core is improved during injection molding of the insulation support, the positioning precision of the stator assembly is improved during injection molding of the shell, the injection molding reliability is improved, and the first positioning groove and the second positioning groove do not interfere with each other.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump technology, and in particular to an electronic water pump, a thermal management system, and a vehicle. Background Technology

[0002] Electric water pumps are widely used due to their advantages such as high efficiency and precise control. Typically, an electric water pump uses a motor to drive an impeller to move liquid. However, the assembly process of electric water pumps is relatively cumbersome, and achieving good positioning accuracy between components is complex and difficult, thus limiting production efficiency. Therefore, the structural design of electric water pumps needs improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electronic water pump that improves the positioning accuracy of the stator core during injection molding of the insulating bracket and the positioning accuracy of the stator assembly during injection molding of the housing, thereby improving injection molding reliability. The first positioning groove and the second positioning groove do not interfere with each other.

[0004] This utility model also proposes a thermal management system having the above-mentioned electronic water pump.

[0005] This utility model also proposes a vehicle having the above-mentioned electronic water pump or the above-mentioned thermal management system.

[0006] An electronic water pump according to a first aspect of the present invention includes: a housing; a stator assembly, the stator assembly including a stator core, an insulating support, and a stator winding, the insulating support being an injection-molded part and injection-molding encapsulating the stator core, the stator winding being mounted on the insulating support, the housing being an injection-molded part and injection-molding encapsulating the stator assembly, at least one first positioning groove being formed on the outer peripheral wall of the stator core, at least a portion of the first positioning groove being exposed outside the insulating support, the housing encapsulating the first positioning groove, at least one second positioning groove being formed on the outer peripheral wall of the insulating support, at least a portion of the second positioning groove being exposed outside the housing, the second positioning groove being offset from the first positioning groove in the axial and / or circumferential directions.

[0007] According to the embodiment of the present invention, the electronic water pump, by setting a first positioning groove on the stator core and a second positioning groove on the insulating support, with at least a portion of the first positioning groove exposed outside the insulating support, the housing encloses the first positioning groove, and at least a portion of the second positioning groove exposed outside the housing, facilitates the assembly of the insulating support and the stator core, and the assembly of the stator assembly and the housing, thereby improving assembly efficiency. Simultaneously, it improves the positioning accuracy of the stator core during injection molding of the insulating support and the positioning accuracy of the stator assembly during injection molding of the housing, thus improving injection molding reliability. Furthermore, the second positioning groove and the first positioning groove are offset axially and / or circumferentially, requiring the liquid between the housing and the insulating support to penetrate a certain distance circumferentially and / or axially from the second positioning groove before reaching the position of the first positioning groove exposed between the insulation and the stator core. This enhances the protection of the stator core and reduces the possibility of rust and corrosion.

[0008] In some embodiments, the stator core includes a plurality of stator teeth and an annular stator yoke, the plurality of stator teeth being circumferentially spaced apart, the radially outer ends of the stator teeth being connected to the stator yoke, the number of first positioning slots being less than or equal to the number of stator teeth, and each first positioning slot being radially opposite to the corresponding stator tooth; and / or, the number of second positioning slots being less than or equal to the number of stator teeth, and each second positioning slot being radially opposite to the corresponding stator tooth.

[0009] In some embodiments, the first positioning groove extends through both axial ends of the stator core, and a through hole is formed on the insulating support that extends radially through the insulating support. The through hole is opposite to the first positioning groove so that the end of the first positioning groove is exposed through the through hole to the insulating support. The plurality of through holes correspond to the same axial end of the stator core.

[0010] In some embodiments, the through hole penetrates one axial end of the insulating bracket corresponding to the stator core portion to form an opening, the through hole having a first positioning wall axially opposite to the opening, the width of the first positioning wall in the circumferential direction being greater than the width of the first positioning groove in the circumferential direction.

[0011] In some embodiments, the insulating support includes a first insulating portion, a second insulating portion, and a third insulating portion arranged sequentially along the axial direction. The second insulating portion wraps around the stator core, and the outer peripheral wall of the second insulating portion protrudes from the first insulating portion and the third insulating portion. The first insulating portion and the third insulating portion respectively correspond to the portion of the stator winding that protrudes from the stator core in the axial direction. A plurality of second positioning grooves are formed on the second insulating portion and penetrate the same end of the second insulating portion in the axial direction. The axial dimension of the second positioning groove is less than half the axial length of the second insulating portion.

[0012] In some embodiments, a groove is formed on the housing, the groove opening is formed at one axial end of the housing, the groove includes a first groove portion and a second groove portion, the circumferential width of the first groove portion is smaller than the circumferential width of the second groove portion, the first groove portion is disposed on the side of the second groove portion away from the groove opening and radially opposite to the second positioning groove, so that at least a portion of the second positioning groove is exposed through the groove to the housing, and the end face of the axial end of the second insulating portion opposite to the second groove portion forms a second positioning wall.

[0013] In some embodiments, a positioning hole is formed at one axial end of the second insulating part away from the second positioning part, and the end face of one axial end of the stator core is partially exposed to the insulating support through the positioning hole.

[0014] In some embodiments, the electronic water pump further includes an impeller, a pump cover, a rotor assembly, and a rear cover. The axial ends of the housing are respectively formed with openings and injection molded to cover the axial ends, radial outer end, and radial inner end of the stator assembly. The pump cover and the rear cover are respectively installed on the axial ends of the housing. The rotor assembly is located on the radial inner side of the stator assembly. The impeller is located inside the pump cover and injection molded to the rotor assembly.

[0015] In some embodiments, the number of the first positioning slot and the number of the second positioning slot are both at least three, with the plurality of first positioning slots and the plurality of second positioning slots being spaced apart circumferentially.

[0016] In some embodiments, the circumferential distance between two adjacent slots in the plurality of first positioning slots is a first distance, and at least two of the plurality of first distances are unequal; and / or, the circumferential distance between two adjacent slots in the plurality of second positioning slots is a second distance, and at least two of the plurality of second distances are unequal.

[0017] In some embodiments, the portion of each first positioning groove exposed on the insulating support and the corresponding second positioning groove respectively correspond to the two ends of the stator core, and at least one first positioning groove and the corresponding second positioning groove are arranged opposite each other along the axial direction; and / or, at least one first positioning groove and the corresponding second positioning groove are staggered in the circumferential direction.

[0018] A thermal management system according to a second aspect of the present invention includes an electronic water pump according to the first aspect of the present invention described above.

[0019] According to the embodiments of the present invention, the use of the above-mentioned electronic water pump in the thermal management system improves the reliability of the thermal management system.

[0020] A vehicle according to a third aspect of the present invention includes an electronic water pump according to the first aspect of the present invention or a thermal management system according to the second aspect of the present invention.

[0021] The vehicle according to the embodiments of the present invention, by adopting the above-described electronic water pump or thermal management system, is conducive to improving the reliability of vehicle use.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the stator assembly of an electronic water pump according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 An enlarged view of part A, shown in the center circle;

[0026] Figure 3 yes Figure 1 Another schematic diagram of the stator assembly shown;

[0027] Figure 4 yes Figure 3 Another schematic diagram of the stator assembly shown;

[0028] Figure 5 According to one embodiment of the present invention, the housing of an electronic water pump is enclosed in... Figure 1 The diagram shows an assembly schematic of the stator assembly shown.

[0029] Figure 6 yes Figure 1 Another schematic diagram of the stator assembly shown;

[0030] Figure 7 yes Figure 6 Another schematic diagram of the stator assembly shown;

[0031] Figure 8 yes Figure 7 A cross-sectional view of the stator assembly shown;

[0032] Figure 9 yes Figure 5 The diagram shows a cross-sectional view of the housing and stator assembly assembly, with the stator assembly employing... Figure 8 The stator assembly shown;

[0033] Figure 10 yes Figure 5 Another assembly drawing of the housing and stator assembly shown;

[0034] Figure 11 It is along Figure 10 Sectional view of the middle BB line;

[0035] Figure 12 It is along Figure 10 Another sectional view of the middle BB line;

[0036] Figure 13 yes Figure 12 Enlarged view of section C, shown in the center circle;

[0037] Figure 14 yes Figure 5 The exploded view of the casing and stator assembly shown;

[0038] Figure 15 yes Figure 14 Enlarged view of section D shown in the center circle;

[0039] Figure 16 yes Figure 14 Another exploded view of the housing and stator assembly shown;

[0040] Figure 17 This is a schematic diagram of an electronic water pump according to an embodiment of the present invention;

[0041] Figure 18 This is a schematic diagram of a vehicle according to one embodiment of the present invention.

[0042] Figure label:

[0043] Vehicle 300, thermal management system 200, electronic water pump 100, housing 1, groove 1a, slot 1b, first slot 1c, second slot 1d, stator assembly 2, stator core 21, first positioning groove 21a, stator teeth 211, stator yoke 212, insulating bracket 22, second positioning groove 22a, through hole 22b, opening 22c, first positioning wall 22d, second positioning wall 22e, positioning hole 22f, first insulating part 221, second insulating part 222, third insulating part 223, stator winding 23, impeller 3, pump cover 4, rotor assembly 5, rear cover 6. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] Hereinafter, with reference to the accompanying drawings, an electronic water pump 100 according to a first aspect embodiment of the present invention will be described.

[0048] In some embodiments, such as Figure 1 and Figure 8 As shown, the electronic water pump 100 includes a stator assembly 2, which includes a stator core 21, an insulating bracket 22, and a stator winding 23. The insulating bracket 22 is an injection-molded part, and the insulating bracket 22 encapsulates the stator core 21. The stator winding 23 is mounted on the insulating bracket 22. It can be seen that the insulating bracket 22 can be assembled with the stator core 21 by injection molding, which helps to simplify the assembly process of the stator assembly 2, save assembly costs, and facilitate a reliable connection between the insulating bracket 22 and the stator core 21, thereby improving the structural stability of the entire stator assembly 2. The insulating bracket 22 can also separate the stator core 21 and the stator winding 23, achieving insulation between the stator core 21 and the stator winding 23. At the same time, the insulating bracket 22 can also provide winding space and winding support for the stator winding 23.

[0049] For example, if the insulating bracket 22 is a single injection molded part, then the insulating bracket 22 can be formed by injection molding only once, and the insulating bracket 22 can be assembled and connected with the stator core 21 simultaneously during the injection molding process. For example, during the manufacturing process of the stator assembly 2, the stator core 21 can be placed in the injection mold, and then the insulating bracket 22 can be injection molded. Demolding can realize the assembly of the insulating bracket 22 and the stator core 21. The whole production process is relatively simple, without multiple injection molding, and the assembly process between the insulating bracket 22 and the stator core 21 is eliminated. Moreover, only one set of injection mold is needed, which simplifies the design and process assembly cost of the parts and realizes the integrated injection molding of the insulating bracket 22 and the stator core 21.

[0050] In some embodiments, such as Figure 1 , Figure 5 , Figure 9 and Figure 11 As shown, the electronic water pump 100 also includes a housing 1, which is an injection molded part, and the housing 1 is injection molded to enclose the stator assembly 2. It can be seen that the housing 1 can be assembled with the stator assembly 2 by injection molding, which helps to simplify the assembly process of the electronic water pump 100, save assembly costs, and facilitate a reliable connection between the housing 1 and the stator assembly 2, thereby improving the structural stability of the electronic water pump 100.

[0051] For example, if the housing 1 is a single injection molded part, the housing 1 is formed by a single injection molding process, and the housing 1 can be assembled and connected with the stator assembly 2 simultaneously during the injection molding process. For example, in the manufacturing process of the electronic water pump 100, the stator assembly 2 can be placed in the injection mold, and then the housing 1 can be injection molded. Demolding can realize the assembly of the housing 1 and the stator assembly 2. The whole production process is simple and does not require multiple injection molding processes. It can also save the assembly process between the housing 1 and the stator assembly 2. Moreover, only one set of injection molds is needed, which can simplify the design of parts and reduce costs.

[0052] In some embodiments, such as Figure 1 , Figure 5 , Figure 9 and Figure 11As shown, the electronic water pump 100 includes a housing 1 and a stator assembly 2. The stator assembly 2 includes a stator core 21, an insulating bracket 22 and a stator winding 23. The insulating bracket 22 is an injection molded part and the injection molded part wraps around the stator core 21. The stator winding 23 is mounted on the insulating bracket 22. The housing 1 is an injection molded part and the injection molded part wraps around the stator assembly 2. At least one first positioning groove 21a is formed on the outer peripheral wall of the stator core 21. At least a portion of the first positioning groove 21a is exposed to the insulating support 22, that is, at least a portion of the groove wall of the first positioning groove 21a is exposed to the insulating support 22. The housing 1 covers the first positioning groove 21a, so the first positioning groove 21a is not exposed to the housing 1. At least one second positioning groove 22a is formed on the outer peripheral wall of the insulating support 22. At least a portion of the second positioning groove 22a is exposed to the housing 1, that is, at least a portion of the groove wall of the second positioning groove 22a is exposed to the housing 1. The second positioning groove 22a and the first positioning groove 21a are offset in the axial and / or circumferential directions, so the second positioning groove 22a and the first positioning groove 21a are not opposite each other in the radial direction.

[0053] Obviously, the first positioning groove 21a is exposed at least part of the groove wall of the insulating bracket 22. The insulating bracket 22 has a through hole 22b so that the part of the first positioning groove 21a exposed in the insulating bracket 22 is exposed through the through hole 22b. In the manufacturing process of the electronic water pump 100, the stator core 21 is first formed, and then the stator core 21 is used as an injection molding insert to injection mold the insulating bracket 22. Then, the stator winding 23 is wound on the insulating bracket 22. After the stator winding 23 is wound, the stator assembly 2 is used as an injection molding insert to injection mold the housing 1.

[0054] During the injection molding of the insulating bracket 22, the positioning fixture of the mold can abut against at least a portion of the first positioning groove 21a to circumferentially position the stator core 21, restricting the rotation of the stator core 21 in the circumferential direction. After the insulating bracket 22 is injection molded and demolded, the positioning fixture retracts, and the aforementioned at least portion of the first positioning groove 21a that abuts against the positioning fixture is exposed on the insulating bracket 22, while a second positioning groove 22a is formed on the insulating bracket 22. Thus, the setting of the first positioning groove 21a can achieve circumferential positioning of the stator core 21 during the injection molding of the insulating bracket 22, reducing the possibility of the stator core 21 rotating during the injection molding process, which is beneficial for fixing the posture of the stator core 21, improving the relative positional accuracy of the stator core 21 and the insulating bracket 22, reducing the risk of injection molding defects caused by the rotational movement of the stator core 21, and improving the injection molding reliability and injection molding quality of the insulating bracket 22.

[0055] During the injection molding of the housing 1, the positioning fixture of the mold can abut against at least a portion of the second positioning groove 22a to circumferentially position the stator assembly 2, restricting the rotation of the stator assembly 2 in the circumferential direction. After the housing 1 is injection molded and demolded, the positioning fixture retracts, and the aforementioned at least portion of the second positioning groove 22a that abuts against the positioning fixture is exposed outside the housing 1. Thus, the second positioning groove 22a enables circumferential positioning of the insulating support 22 during the injection molding of the housing 1. Since the insulating support 22 is injection molded to enclose the stator core 21, and the stator winding 23 is wound around the insulating support 22, the second positioning groove 22a enables circumferential positioning of the stator assembly 2, reducing the possibility of rotation of the stator assembly 2 during injection molding. This helps to fix the posture of the stator assembly 2, improves the relative positional accuracy between the stator assembly 2 and the housing 1, reduces the risk of injection defects caused by the rotational movement of the stator assembly 2, and improves the injection molding efficiency of the housing 1. This ensures the reliability and quality of the injection molding process. Furthermore, because the first positioning groove 21a and the second positioning groove 22a are misaligned circumferentially and / or axially, and the positioning fixture does not abut against the first positioning groove 21a during the injection molding process of the housing 1, the housing 1 can wrap around the first positioning groove 21a during the injection molding process. This prevents the first positioning groove 21a from being exposed outside the housing 1, ensuring that the part of the stator core 21 that abuts against the positioning fixture is not exposed in the operating environment of the electronic water pump 100. This helps to protect the stator core 21, making it less prone to rust and corrosion.

[0056] Furthermore, since the first positioning groove 21a and the second positioning groove 22a are misaligned in the circumferential and / or axial directions, the first positioning groove 21a and the second positioning groove 22a have a certain distance in the axial and / or circumferential directions. At the same time, since at least a part of the second positioning groove 22a is exposed outside the housing 1, even if external impurities such as liquids penetrate into the space between the housing 1 and the insulating support 22 through the second positioning groove 22a, the liquid in the second positioning groove 22a between the housing 1 and the insulating support 22 needs to flow through a certain penetration path to reach the position of the first positioning groove 21a between the housing 1 and the stator core 21. In other words, if the portion of the stator core 21 exposed outside the insulating support 22 at the first positioning groove 21a is to be corroded, the liquid between the housing 1 and the insulating support 22 needs to penetrate a certain distance from the second positioning groove 22a in the circumferential and / or axial directions before reaching the position of the first positioning groove 21a exposed outside the insulation of the stator core 21. This is beneficial to improving the protection of the stator core 21 and reducing the possibility of rust and corrosion of the stator core 21.

[0057] As can be seen, in the manufacturing process of the electronic water pump 100, the first positioning groove 21a can serve as the first injection molding positioning structure to realize the injection molding of the insulating bracket 22, and the second positioning groove 22a can serve as the second injection molding positioning structure to realize the injection molding of the housing 1. Furthermore, the first positioning groove 21a can be formed by a recess in a portion of the outer peripheral wall of the stator core 21, so the first positioning groove 21a will not protrude from the outer peripheral wall of the stator core 21, thus not increasing the space occupied by the stator core 21, and making the thickness of the housing 1 at the first positioning groove 21a relatively thin compared to other positions. Similarly, the second positioning groove 22a can be formed by a recess in a portion of the outer peripheral wall of the insulating bracket 22, so the second positioning groove 22a will not protrude from the outer peripheral wall of the insulating bracket 22, thus not increasing the space occupied by the insulating bracket 22. Moreover, compared to using a protrusion as the injection molding positioning method, in the manufacturing process of the electronic water pump 100, the first positioning groove 21a and the second positioning groove 22a in this embodiment are less likely to be bumped or knocked.

[0058] In the embodiments of this application, the electronic water pump 100 has a central axis L. The extension direction of the central axis L is the axial direction of the electronic water pump 100 and the axial direction of the stator core 21. The "circumferential direction" is the direction around the central axis L, which is the circumferential direction of the electronic water pump 100 and the circumferential direction of the stator core 21. The "radial direction" is the direction passing through the central axis L in the radial plane, which is the radial direction of the electronic water pump 100 and the radial direction of the stator core 21. The radial plane is perpendicular to the central axis L.

[0059] It is understood that the number and arrangement of the first positioning grooves 21a and the number and arrangement of the second positioning grooves 22a can be specifically set according to actual needs. For example, multiple first positioning grooves 21a are arranged at intervals along the circumference. In this case, the multiple first positioning grooves 21a can be located in the same radial plane, or at least two of the multiple first positioning grooves 21a are located in different radial planes. Similarly, multiple second positioning grooves 22a are arranged at intervals along the circumference. In this case, the multiple second positioning grooves 22a can be located in the same radial plane, or at least two of the multiple second positioning grooves 22a are located in different radial planes.

[0060] According to the embodiment of the present invention, the electronic water pump 100, by providing a first positioning groove 21a on the stator core 21 and a second positioning groove 22a on the insulating bracket 22, with at least a portion of the first positioning groove 21a exposed outside the insulating bracket 22, the housing 21 encloses the first positioning groove 21a, and at least a portion of the second positioning groove 22a is exposed outside the housing 1, which facilitates the assembly of the insulating bracket 22 and the stator core 21, and the assembly of the stator assembly 2 and the housing 1, thereby improving assembly efficiency. Simultaneously, the stator core 21 can be lifted during the injection molding of the insulating bracket 22. The positioning accuracy of the core 21 is improved, and the positioning accuracy of the stator assembly 2 is improved during injection molding of the housing 1, thereby improving the reliability of injection molding. In addition, the second positioning groove 22a and the first positioning groove 21a are offset in the axial and / or circumferential directions. The liquid between the housing 1 and the insulating support 22 needs to penetrate a certain distance from the second positioning groove 22a in the circumferential and / or axial directions before it can reach the position of the first positioning groove 21a where the stator core 21 is exposed between the insulation. This helps to improve the protection of the stator core 21 and reduce the possibility of rust and corrosion of the stator core 21.

[0061] In some embodiments, such as Figures 1-7 As shown, the stator core 21 includes multiple stator teeth 211 and an annular stator yoke 212. The multiple stator teeth 211 are spaced apart circumferentially, and the radial outer ends of the stator teeth 211 are connected to the stator yoke 212. The first positioning groove 21a is formed on the outer peripheral wall of the stator yoke 212, which is beneficial to improve the magnetic flux distribution of the stator core 21 to a certain extent, improve the magnetic field fluctuation, and enhance the electromagnetic performance of the electronic water pump 100.

[0062] Wherein, the number of first positioning grooves 21a is less than or equal to the number of stator teeth 211, and each first positioning groove 21a is radially opposite to the corresponding stator tooth 211, then each first positioning groove 21a is located radially outside the corresponding stator tooth 211, and the number of stator teeth 211 with corresponding first positioning grooves 21a is less than or equal to the total number of stator teeth 211; and / or, the number of second positioning grooves 22a is less than or equal to the number of stator teeth 211, and each second positioning groove 22a is radially opposite to the corresponding stator tooth 211, then each second positioning groove 22a is located radially outside the corresponding stator tooth 211, and the number of stator teeth 211 with corresponding second positioning grooves 22a is less than or equal to the total number of stator teeth 211.

[0063] It is understandable that the number of first positioning slots 21a is less than or equal to the number of stator teeth 211, which facilitates a certain degree of increase in the space occupied by the first positioning slots 21a, which is beneficial to improving the positioning bearing capacity of the first positioning slots 21a. Moreover, the number of first positioning slots 21a is relatively small, so as to improve the positioning efficiency of the stator core 2121 to a certain extent while achieving reliable positioning of the stator core 2121. Furthermore, each first positioning slot 21a is radially opposite to the corresponding stator tooth 211, which helps to reduce the impact on the magnetic circuit of the stator core 21 caused by setting the first positioning slots 21a. Similarly, the number of second positioning grooves 22a is less than or equal to the number of stator teeth 211, which makes it easier to appropriately increase the space occupied by the second positioning grooves 22a to a certain extent, which is beneficial to improving the positioning bearing capacity of the second positioning grooves 22a. Moreover, the number of second positioning grooves 22a is relatively small, so as to improve the positioning efficiency of the stator assembly 2 to a certain extent while achieving reliable positioning of the stator assembly 2. Each second positioning groove 22a is radially opposite to the corresponding stator tooth 211, which is beneficial to reduce the impact on the magnetic circuit of the stator assembly 2 caused by setting the second positioning grooves 22a.

[0064] In some embodiments, such as Figure 1 , Figure 3 and Figure 4 , Figure 14 , Figure 16 As shown, the first positioning groove 21a passes through both ends of the stator core 21 in the axial direction. Therefore, during the processing of the stator core 21, the stator core 21 includes multiple stator laminations stacked axially. The outer contours of these multiple stator laminations can be identical, which helps reduce the number of stator lamination replacements, facilitates the processing of the stator laminations, and improves processing efficiency. Simultaneously, the exposed end of the first positioning groove 21a prevents the stator core 21 from being excessively exposed to the insulating support 22, further reducing the possibility of rust on the stator core 21, and also avoids significantly affecting the structural strength and magnetic circuit design of the stator core 21.

[0065] The insulating bracket 22 has a through hole 22b extending radially through it. The through hole 22b is opposite to the first positioning groove 21a, so that the end of the first positioning groove 21a is exposed through the through hole 22b to the insulating bracket 22. The through hole 22b is formed at the position of the insulating bracket 22 corresponding to the axial end of the stator core 21. Moreover, since multiple through holes 22b correspond to the same axial end of the stator core 21, the exposed portions of multiple first positioning grooves 21a are located at the same axial end of the stator core 21. This can reduce the axial distance of the positioning force applied by the positioning fixture to the stator core 21. For example, it makes it easier for the positioning force applied by the positioning fixture to the stator core 21 at multiple first positioning grooves 21a to be located on the same radial plane, which helps to reduce the possibility of the stator core 21 deflecting and further improves the positioning accuracy of the stator core 21 when injection molding the insulating bracket 22.

[0066] In the above scheme, since the portion of the first positioning groove 21a exposed on the insulating support 22 is located at one axial end of the stator core 21, the second positioning groove 22a only needs to be spaced apart from the first positioning groove 21a in the axial and / or circumferential directions. For example, the second positioning groove 22a is axially opposite to the first positioning groove 21a, and the second positioning groove 22a is located at the end of the insulating support 22 corresponding to the portion of the stator core 21 (e.g., the second insulating part 222 described later) that is axially away from the first positioning groove 21a. At this time, the first positioning groove 21a and the second positioning groove 22a correspond to the two ends of the stator core 21 respectively, so that the two have a large distance in the axial direction, which is beneficial to increasing the liquid penetration path length and further reducing the possibility of rusting of the stator core 21.

[0067] In some embodiments, such as Figure 1 , Figure 2 Figure 15 As shown, the through hole 22b penetrates one axial end of the insulating support 22 corresponding to the stator core 21 portion (e.g., the second insulating portion 222 described later) to form an opening 22c. The through hole 22b has a first positioning wall 22d that is axially opposite to the opening 22c. The width h1 of the first positioning wall 22d in the circumferential direction is greater than the width h2 of the first positioning groove 21a in the circumferential direction.

[0068] As can be seen, because the insulating bracket 22 wraps around the stator core 21, and at least a portion of the first positioning groove 21a is exposed through the through hole 22b, the insulating bracket 22 will inevitably form a first positioning wall 22d at the position of the through hole 22b. Since the circumferential width of the first positioning wall 22d is greater than the circumferential width of the first positioning groove 21a, the circumferential width of the through hole 22b is greater than the circumferential width of the first positioning groove 21a. This is beneficial for the first positioning wall 22d to have a relatively large surface area, so that in the subsequent injection molding process of the housing 1, the positioning fixture can abut against the first positioning wall 22d to improve the reliability of axial positioning of the stator assembly 2 and improve the positioning accuracy. Therefore, the above-mentioned setting of the first positioning wall 22d can improve the axial positioning stability of the stator assembly 2 during the injection molding process of the housing 1, realize the reliable restriction of the axial movement of the stator assembly 2, and further improve the injection molding reliability of the housing 1.

[0069] In other words, the above scheme does not utilize the groove wall of the first positioning groove 21a to achieve axial positioning of the stator assembly 2. Therefore, the size of the first positioning groove 21a does not need to consider the axial positioning function. Thus, the size of the first positioning groove 21a can be appropriately reduced while satisfying the circumferential positioning, which is beneficial to reduce the area of ​​the stator core 21 exposed to the insulating support 22 and reduce the possibility of rust.

[0070] It is understood that the axial dimensions of the through hole 22b and the first positioning groove 21a are not specifically limited. For example, the axial dimension of the through hole 22b can be less than or equal to the axial dimension of the first positioning groove 21a, so as to reduce the area of ​​the stator core 21 exposed to the insulating support 22 and reduce the possibility of rusting of the stator core 21, while ensuring reliable positioning of the stator core 21.

[0071] For example, taking the axial direction as the up and down direction, if the first positioning groove 21a penetrates the upper end of the stator core 21, then the through hole 22b penetrates the upper end of the insulating bracket 22 corresponding to the part of the stator core 21. For example, the through hole 22b penetrates the upper end of the second insulating part 222 described later to form an opening 22c.

[0072] In some embodiments, such as Figure 1 , Figure 3 , Figure 4 and Figure 8As shown, the insulating support 22 includes a first insulating part 221, a second insulating part 222, and a third insulating part 223 arranged sequentially along the axial direction. The second insulating part 222 wraps around the stator core 21, and the outer peripheral wall of the second insulating part 222 protrudes from the first insulating part 221 and the third insulating part 223. The first insulating part 221 and the third insulating part 223 respectively correspond to the portion of the stator winding 23 that protrudes from the stator core 21 in the axial direction. The first insulating part 221 corresponds to the portion of the stator winding 23 that protrudes from the stator core 21 at one end in the axial direction, and the third insulating part 223 corresponds to the portion of the stator winding 23 that protrudes from the stator core 21 at the other end in the axial direction. This facilitates the reliable wrapping of the stator core 21 by the insulating support 22 and provides a certain degree of protection for the stator winding 23. The first insulating part 221 or the third insulating part 223 also provides wiring arrangement support for the winding end of the stator winding 23.

[0073] In this design, multiple second positioning grooves 22a are formed on the second insulating part 22. Each second positioning groove 22 can be formed by a recess in a part of the outer peripheral wall of the second insulating part 22. Multiple second positioning grooves 22a penetrate the same end of the second insulating part 222 along the axial direction, which simplifies the groove wall structure of the second positioning groove 22a and helps to simplify the mold structure. The axial dimension of the second positioning groove 22a is less than half of the axial length of the second insulating part 222. Therefore, the second positioning groove 22a will not cause the insulating support 22 to be excessively exposed to the housing 1. This helps to further reduce the possibility of liquid flowing into the gap between the insulating support 22 and the housing 1, causing the stator core 21 to rust, and will not have a significant impact on the structural strength of the insulating support 22.

[0074] Furthermore, since multiple second positioning grooves 22a are located at the same axial end of the second insulating part 22, the axial distance of the positioning force applied by the positioning fixture to the insulating bracket 22 can be reduced. For example, it is convenient to make the positioning force applied by the positioning fixture to the insulating bracket 22 at multiple second positioning grooves 22a be located on the same radial plane, which helps to reduce the possibility of the insulating bracket 22 deflecting and further improves the positioning accuracy of the stator assembly 2 in the injection molding housing 1.

[0075] In some embodiments, such as Figures 10-13 As shown, a groove 1a is formed on the housing 1. The groove opening 1b of the groove 1a is formed at one axial end of the housing 1. The groove 1a includes a first groove portion 1c and a second groove portion 1d. The circumferential width of the first groove portion 1c is smaller than the circumferential width of the second groove portion 1d. The first groove portion 1c is located on the side of the second groove portion 1d away from the groove opening 1b, and the first groove portion 1c is radially opposite to the second positioning groove 22a, so that at least a portion of the second positioning groove 22a is exposed to the housing 1 through the groove 1a. The end face of one axial end of the second insulating portion 222 opposite to the second groove portion 1d forms a second positioning wall 22e.

[0076] As can be seen, the second positioning wall 22e is part of the axial end face of the second insulating part 222. The second positioning wall 22e is connected to the groove wall of the second positioning groove 22a. The circumferential width of the second positioning wall 22e is greater than the circumferential width of the second positioning groove 22a. This allows the second positioning wall 22e to have a relatively large surface area. In the subsequent assembly process of the electronic water pump 100, the positioning fixture can abut against the second positioning wall 22e to improve the reliability of axial positioning of the structure composed of the stator assembly 2 and the housing 1, improve the positioning accuracy, and improve the convenience of subsequent assembly of the electronic water pump 100. At the same time, the second positioning groove 22a does not need to achieve axial positioning, which is conducive to appropriately reducing the size of the second positioning groove 22a and reducing the risk of liquid seeping into the space between the insulating support 22 and the housing 1.

[0077] In some embodiments, such as Figure 14 and Figure 16 As shown, a positioning hole 22f is formed at one axial end of the second insulating part 222 away from the second positioning groove 22a, and the end face of one axial end of the stator core 21 is partially exposed to the insulating support 22 through the positioning hole 22f.

[0078] Therefore, during the injection molding of the insulating bracket 22, the positioning fixture of the mold can abut against the exposed part of one axial end of the stator core 21 to provide axial support and positioning for the stator core 21, reducing the possibility of the stator core 21 tilting, which is beneficial to fixing the position of the stator core 10 and improving the reliability of injection molding.

[0079] Optionally, there may be multiple positioning holes 22f, at least one positioning hole 22f may be axially opposite to the stator tooth portion 211, so that one axial end face of the stator tooth portion 211 is partially exposed to the insulating support 22 through the positioning hole 22f; and / or, at least one positioning hole 22f may be axially opposite to the stator yoke portion 212, so that one axial end face of the stator yoke portion 212 is partially exposed to the insulating support 22 through the positioning hole 22f.

[0080] In some embodiments, such as Figure 17As shown, the electronic water pump 100 also includes an impeller 3, a pump cover 4, a rotor assembly 5, and a rear cover 6. The axial ends of the housing 1 are respectively open, and the housing 1 is injection molded to cover the axial ends, radial outer end, and radial inner end of the stator assembly 2. Thus, the axial end faces of the stator assembly 2 are covered by the housing 1, as are the inner and outer peripheral walls of the stator assembly 2. This allows only the second positioning groove 22a on the stator assembly 2 to be exposed above the housing 1, providing comprehensive protection for the stator assembly 2. It also facilitates the fixing of the stator winding 23, for example, by injection molding the stator winding 23 and the insulating support 22 onto the housing 1. The pump cover 4 and the rear cover 6 are respectively installed on the axial ends of the housing 1. The rotor assembly 5 is located radially inside the stator assembly 2, and the impeller 3 is located inside the pump cover 4, with the impeller 3 injection molded to the rotor assembly 5. This facilitates the fixing of the impeller 3 and the rotor assembly 5, allowing the rotor assembly 5 to drive the impeller 3 to rotate, thus saving assembly steps.

[0081] For example, the pump cover 4 has a medium inlet and a medium outlet. The impeller 3 rotates to drive liquid into the pump cover 4 from the medium inlet, and after being pressurized, it flows out from the medium outlet. It can be understood that in this embodiment, the impeller 3 is injection molded to the rotor assembly 5, meaning that at least a portion of the impeller 3 is injection molded to the rotor assembly 5. Optionally, the pump cover 4 and the rear cover 6 are welded to the housing 1, eliminating the need for threaded fasteners and reducing the possibility of interference with the mating end plate of the electric water pump 100 in the thermal management system 200 due to the use of threaded fasteners.

[0082] In some embodiments, such as Figure 1 , Figure 3 , Figure 4 , Figures 6-8 As shown, there are at least three first positioning slots 21a and at least three second positioning slots 22a. Multiple first positioning slots 21a are spaced apart circumferentially, and multiple second positioning slots 22a are also spaced apart circumferentially. Therefore, the stator core 21 and the insulating support 22 each have at least three positioning points. The positioning fixture can perform at least three-point circumferential positioning on the stator core 21, and similarly, it can perform at least three-point circumferential positioning on the insulating support 22. This multi-point circumferential positioning has a certain degree of dispersion, which facilitates improving the positioning reliability of the entire stator core 21 and the entire stator assembly 2. It also helps to limit the radial deflection of the stator core 21 and the stator assembly 2, further improving positioning accuracy.

[0083] In some embodiments, such as Figure 6 and Figure 7As shown, the circumferential distance between two adjacent first positioning slots 21a is the first distance. Two of the first distances are not equal. That is, on the cross-section of the electronic water pump 100, with the orthographic projection of the central axis of the stator core 21 as the center, the corresponding central angle between two adjacent first positioning slots 21a is the first central angle. At least two of the first central angles are not equal, which facilitates the error-proofing of the arrangement of the multiple first positioning slots 21a, makes it easier for operators to quickly find the correct installation posture of the stator core 21 and the positioning fixture, and helps to improve injection molding efficiency. And / or, the circumferential distance between two adjacent second positioning slots 22a is the second distance, and two of the second distances are not equal. That is, on the cross-section of the electronic water pump 100, with the orthographic projection of the central axis of the stator core 21 as the center, the corresponding central angle between two adjacent second positioning slots 22a is the second central angle, and at least two of the second central angles are not equal. This facilitates the error-proofing of the arrangement of the multiple second positioning slots 22a, makes it easier for operators to quickly find the correct installation posture of the stator assembly 2 and the positioning fixture, and helps to improve injection molding efficiency.

[0084] In short, there are m first positioning slots 21a. The circumferential distance between any two adjacent slots 21a is the first distance, resulting in (m-1) first distances. At least two of these (m-1) first distances are unequal, and m ≥ 3 and is a positive integer. Similarly, there are n first positioning slots 21a. The circumferential distance between any two adjacent slots 21a is the first distance, resulting in (n-1) first distances. At least two of these (n-1) first distances are unequal, and m ≥ 3 and is a positive integer. Here, m and n can be equal or unequal.

[0085] For example, taking three first positioning slots 21a as an example, the three first positioning slots 21a are respectively the first first positioning slot 21a, the second first positioning slot 21a and the third first positioning slot 21a arranged circumferentially. The circumferential distance between the first first positioning slot 21a and the second first positioning slot 21a is the first distance, and the circumferential distance between the third first positioning slot 21a and the second first positioning slot 21a is the first distance. The two first distances are not equal. That is to say, on the cross-section of the electronic water pump 100, with the orthographic projection of the central axis of the stator core 21 as the center, the central angle between the first first positioning slot 21a and the second first positioning slot 21a is the first central angle, and the central angle between the third first positioning slot 21a and the second first positioning slot 21a is the first central angle. The two first central angles are not equal in size.

[0086] In some embodiments, such as Figure 1 , Figure 3 , Figure 11 , Figure 14 and Figure 16 As shown, the portion of each first positioning groove 21a exposed on the insulating bracket 22 and the corresponding second positioning groove 22a correspond to the two axial ends of the stator core 21, respectively. The through holes 22b formed on the insulating bracket 22 that expose a portion of the stator core 21 and the corresponding second positioning grooves 22a correspond to the two axial ends of the stator core 21, respectively. Thus, multiple through holes 22b are located at the same axial end of the stator core 21, and multiple second positioning grooves 22a correspond to the axial end of the stator core 21 away from the through holes 22b. For example, multiple second positioning grooves 22a are located at the axial end of the second insulating part 222 away from the through holes 22b.

[0087] In this configuration, at least one first positioning groove 21a and a corresponding second positioning groove 22a are arranged axially opposite each other; and / or, at least one first positioning groove 21a and a corresponding second positioning groove 22a are staggered in the circumferential direction. Therefore, the relative arrangement of the first positioning groove 21a and the second positioning groove 22a is more flexible. Furthermore, when each first positioning groove 21a and its corresponding second positioning groove 22a are staggered in the circumferential direction, the distance between the first positioning groove 21a and the second positioning groove 22a can be further increased. This helps to extend the path length of liquid flowing from the gap between the insulating support 22 and the housing 1 at the second positioning groove 22a to the position of the housing 1 and the stator core 21 at the first positioning groove 21a, thus extending the path of liquid penetration to the first positioning groove 21a and reducing the possibility of rust on the stator core 21.

[0088] For example, in Figure 1 , Figure 4 , Figures 6-11 In the example, there are three first positioning grooves 21a and three second positioning grooves 22a. The portions of the three first positioning grooves 21a exposed outside the insulating bracket 22 are located at one axial end of the stator core 21. The three second positioning grooves 22a are located at one axial end of the second insulating part 222 away from the first positioning grooves 21a, such that the three second positioning grooves 22a correspond to the other axial end of the stator core 21. Each first positioning groove 21a is axially opposite to a corresponding second positioning groove 22a. Of course, at least one of the three second positioning grooves 22a can be spaced apart from the corresponding first positioning groove 21a in the circumferential direction.

[0089] A thermal management system 200 according to a second aspect embodiment of the present invention includes an electronic water pump 100 according to the first aspect embodiment of the present invention described above.

[0090] The thermal management system 200 according to the present utility model adopts the above-mentioned electronic water pump 100, which helps to improve the reliability of the thermal management system 200.

[0091] In some embodiments, the thermal management system 200 is an important component for regulating the automotive cabin environment (temperature, humidity, etc.) and the working environment of other components. The thermal management system 200 mainly includes valves, heat exchangers, compressors, and pumps. The pumps include, for example, an electric water pump 100 or other water pumps. The thermal management system 200 contains a circulating refrigerant, which may be liquid antifreeze or carbon dioxide refrigerant, etc.

[0092] The vehicle 300 according to a third aspect of the present invention includes an electronic water pump 100 according to the first aspect of the present invention or a thermal management system 200 according to the second aspect of the present invention.

[0093] The vehicle 300 according to the present utility model embodiment, by adopting the above-mentioned electronic water pump 100 or thermal management system 200, is conducive to improving the reliability of the vehicle 300.

[0094] It is worth noting that the specific type of vehicle 300 referred to in this application is not limited. For example, vehicle 300 can be a gasoline vehicle, a gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, range-extended electric vehicles, solar electric vehicles, gas fuel vehicles (such as hydrogen engine vehicles), or biofuel vehicles (such as vehicles powered by ethanol, biodiesel, etc.).

[0095] Other configurations and operations of the thermal management system 200 and vehicle 300 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0096] Furthermore, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. In addition, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

[0097] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0098] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0100] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic water pump, characterized in that, include: chassis; A stator assembly, comprising a stator core, an insulating support, and stator windings, wherein the insulating support is an injection-molded part and injection-moldes the stator core, the stator windings are mounted on the insulating support, and the housing is an injection-molded part and injection-moldes the stator assembly. At least one first positioning groove is formed on the outer peripheral wall of the stator core, at least a portion of the first positioning groove is exposed outside the insulating support, and the housing encloses the first positioning groove. At least one second positioning groove is formed on the outer peripheral wall of the insulating bracket, at least a portion of the second positioning groove is exposed outside the housing, and the second positioning groove is offset from the first positioning groove in the axial and / or circumferential directions.

2. The electronic water pump according to claim 1, characterized in that, The stator core includes multiple stator teeth and an annular stator yoke. The multiple stator teeth are spaced apart circumferentially, and the radially outer ends of the stator teeth are connected to the stator yoke. The number of the first positioning slots is less than or equal to the number of the stator teeth, and each first positioning slot is radially opposite to the corresponding stator tooth; and / or, The number of the second positioning grooves is less than or equal to the number of the stator teeth, and each of the second positioning grooves is radially opposite to the corresponding stator tooth.

3. The electronic water pump according to claim 1, characterized in that, The first positioning groove passes through both ends of the stator core in the axial direction. A through hole is formed on the insulating bracket in the radial direction, and the through hole is opposite to the first positioning groove so that the end of the first positioning groove is exposed through the through hole to the insulating bracket. The multiple through holes correspond to the same end of the stator core in the axial direction.

4. The electronic water pump according to claim 3, characterized in that, The through hole penetrates one axial end of the insulating bracket corresponding to the stator core portion to form an opening. The through hole has a first positioning wall axially opposite to the opening, and the width of the first positioning wall in the circumferential direction is greater than the width of the first positioning groove in the circumferential direction.

5. The electronic water pump according to claim 1, characterized in that, The insulating support includes a first insulating part, a second insulating part, and a third insulating part arranged sequentially along the axial direction. The second insulating part wraps around the stator core, and the outer peripheral wall of the second insulating part protrudes from the first insulating part and the third insulating part. The first insulating part and the third insulating part respectively correspond to the portion of the stator winding that protrudes from the stator core in the axial direction. A plurality of second positioning grooves are formed on the second insulating part and penetrate the same end of the second insulating part in the axial direction. The axial dimension of the second positioning groove is less than half the axial length of the second insulating part.

6. The electronic water pump according to claim 5, characterized in that, A groove is formed on the housing, and the groove opening is formed at one axial end of the housing. The groove includes a first groove portion and a second groove portion. The circumferential width of the first groove portion is smaller than the circumferential width of the second groove portion. The first groove portion is located on the side of the second groove portion away from the groove opening and is radially opposite to the second positioning groove, so that at least a portion of the second positioning groove is exposed to the housing through the groove. The end face of the second insulating portion at one axial end, which is opposite to the second groove portion, forms a second positioning wall.

7. The electronic water pump according to claim 6, characterized in that, A positioning hole is formed at one axial end of the second insulating part away from the second positioning groove, and the end face of one axial end of the stator core is partially exposed to the insulating support through the positioning hole.

8. The electronic water pump according to claim 1, characterized in that, The electronic water pump also includes an impeller, a pump cover, a rotor assembly, and a rear cover. The axial ends of the housing are respectively formed with openings and injection molded to cover the axial ends, radial outer end, and radial inner end of the stator assembly. The pump cover and the rear cover are respectively installed on the axial ends of the housing. The rotor assembly is located on the radial inner side of the stator assembly. The impeller is located inside the pump cover and is injection molded to the rotor assembly.

9. The electronic water pump according to any one of claims 1-8, characterized in that, The number of the first positioning slot and the number of the second positioning slot are both at least three, with the first positioning slots and the second positioning slots being spaced apart circumferentially.

10. The electronic water pump according to claim 9, characterized in that, The circumferential distance between any two adjacent slots in a plurality of the first positioning slots is a first distance, and at least two of the plurality of first distances are unequal; and / or, The circumferential distance between two adjacent slots in the plurality of second positioning slots is the second distance, and at least two of the plurality of second distances are unequal.

11. The electronic water pump according to claim 9, characterized in that, The portion of each first positioning groove exposed on the insulating bracket corresponds to one of the two axial ends of the stator core, respectively, along with the corresponding second positioning groove. At least one of the first positioning grooves and a corresponding second positioning groove are disposed axially opposite to each other; and / or, At least one of the first positioning slots and the corresponding second positioning slots are offset in the circumferential direction.

12. A thermal management system, characterized in that, Includes the electronic water pump according to any one of claims 1-11.

13. A vehicle, characterized in that, Includes the electronic water pump according to any one of claims 1-11 or the thermal management system according to claim 12.

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