Stator assembly of electronic water pump, electronic water pump, thermal management system and vehicle

Abstract

A stator assembly (100) of an electronic water pump (200), the electronic water pump (200), a thermal management system (300) and a vehicle (1000). The stator assembly (100) comprises: a stator core (10); and an insulating support (30) which comprises a support body (31) and a positioning column (32), wherein the support body (31) envelops the stator core (10), the positioning column (32) is arranged on the support body (31), and the positioning column (32) is provided with a support positioning hole (301) extending in an axial direction. A hole wall surface of the support positioning hole (301) is spaced apart from the stator core (10) by a predetermined distance, and the support positioning hole (301) is configured to support and position the stator assembly (100) when a housing (21) of the electronic water pump (200) is injection-molded.

Description

Stator assembly of electronic water pump, electronic water pump, thermal management system and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202410308448.3 and No. 202420565940.4 filed by Anqing Welling Auto Parts Co., Ltd., Anhui Welling Auto Parts Co., Ltd. and Guangdong Welling Auto Parts Co., Ltd. on March 18, 2024. The entire contents of the above Chinese patent applications are hereby incorporated into this application by reference. Technical Field

[0003] The present application relates to the technical field of electronic water pumps, and more specifically, to a stator assembly of an electronic water pump, an electronic water pump, a thermal management system, and a vehicle. Background Art

[0004] Electronic water pumps are widely used due to their high efficiency and precise control. However, in related technologies, after the stator assembly is assembled, the stator core must be secured by its outer diameter and then encased in a plastic casing. The outer diameter of the stator core must then be sealed by methods such as glue injection, welding, or the addition of a rear cover. This process is complex and costly. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a stator assembly of an electronic water pump, which can be positioned by positioning the stator assembly through the positioning columns of the insulating bracket, thereby eliminating the sealing process after the casing is formed.

[0006] Another object of the present application is to provide an electronic water pump having the above-mentioned stator assembly.

[0007] Another object of the present application is to provide a thermal management system having the above-mentioned electronic water pump.

[0008] Another object of the present application is to provide a vehicle having the above thermal management system.

[0009] According to the stator assembly of the electronic water pump according to the embodiment of the present application, it includes: a stator core; an insulating bracket, the insulating bracket including a bracket body and a positioning column, the bracket body wraps the stator core, the positioning column is arranged on the bracket body and the positioning column is provided with a bracket positioning hole extending in the axial direction, the hole wall of the bracket positioning hole is spaced apart from the stator core by a predetermined distance, and the bracket positioning hole is used to support and position the stator assembly when the housing of the electronic water pump is injection molded.

[0010] According to the stator assembly of the electronic water pump in the embodiment of the present application, a positioning column is set through an insulating bracket. The positioning column has a bracket positioning hole with the hole wall spaced apart from the stator iron core. The insulating bracket expands the function of supporting and positioning the stator assembly in cooperation with the mold during the injection molding process of the casing, without the need to use the stator iron core for support and positioning, and no subsequent sealing process is required after the casing is formed, which is conducive to simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump.

[0011] In addition, the stator assembly of the electronic water pump according to the above embodiment of the present application may also have the following additional technical features:

[0012] According to some embodiments of the present application, the bracket positioning hole includes a first hole segment and a second hole segment, the second hole segment is located on the side of the first hole segment close to the end opening of the bracket positioning hole, and the cross-sectional area of ​​the second hole segment perpendicular to the depth direction of the bracket positioning hole is greater than the cross-sectional area of ​​the first hole segment perpendicular to the depth direction of the bracket positioning hole.

[0013] According to some embodiments of the present application, the bracket positioning hole is located on one axial side of the stator core.

[0014] According to some embodiments of the present application, a portion of the bracket positioning hole is located radially outside the stator core and another portion of the bracket positioning hole is located on an axial side of the stator core.

[0015] According to some embodiments of the present application, an avoidance groove is provided on the outer peripheral surface of the stator core, and part of the bracket positioning holes is located in the avoidance groove.

[0016] According to some embodiments of the present application, the avoidance groove includes a first slot segment and a second slot segment extending axially, part of the bracket positioning hole is located in the first slot segment, and the insulating bracket is embedded in the second slot segment.

[0017] According to some embodiments of the present application, the positioning column is at least partially located radially outside the bracket body and connected to the bracket body, and the positioning column is provided with column reinforcement ribs on both sides along the circumference of the bracket body. The column reinforcement ribs are connected to the bracket body and protrude from the outer peripheral surface of the bracket body.

[0018] According to some embodiments of the present application, the bracket body includes a core insulation portion, a first baffle insulation portion and a second baffle insulation portion, the core insulation portion wraps the stator core, the first baffle insulation portion and the second baffle insulation portion are arranged at the axial ends of the core insulation portion, and the first baffle insulation portion corresponding to the same stator tooth portion of the stator core is located radially inside the second baffle insulation portion, and the positioning column is at least partially located radially outside the second baffle insulation portion.

[0019] According to some embodiments of the present application, the positioning column and the second baffle insulating portion are radially spaced apart to form a wiring gap, and the lead wires of the stator winding of the stator assembly are at least partially located in the wiring gap.

[0020] According to some embodiments of the present application, a reinforcement portion is provided in the wiring gap, and the reinforcement portion connects the positioning column and the second baffle insulating portion.

[0021] According to some embodiments of the present application, in the axial direction of the stator core, the distance between the end face of the second baffle insulation portion away from the core insulation portion and the core insulation portion is H1, and the distance between the end face of the positioning column away from the core insulation portion and the core insulation portion is H2, and H1 and H2 are not equal.

[0022] According to some embodiments of the present application, a limiting portion is provided on the radial outer side of the second baffle insulating portion, the limiting portion and the positioning column are at least partially offset in the circumferential direction, and the lead wire portion is located between the limiting portion and the core insulating portion.

[0023] According to some embodiments of the present application, the positioning column is connected to the second baffle insulating portion, and the positioning column is provided with a wire blocking portion on the side radially facing away from the second baffle insulating portion, and the wire blocking portion defines a wiring groove, and the lead-out wire of the stator winding of the stator assembly is at least partially located in the wiring groove.

[0024] According to some embodiments of the present application, there are multiple bracket positioning holes and they are arranged at intervals along the circumference of the stator core; or, there is one bracket positioning hole and the cross-section of the bracket positioning hole perpendicular to the axial direction of the positioning core is non-circular.

[0025] An electronic water pump according to an embodiment of the present application includes a stator assembly of an electronic water pump according to an embodiment of the present application.

[0026] A thermal management system according to an embodiment of the present application includes an electronic water pump according to an embodiment of the present application.

[0027] A vehicle according to an embodiment of the present application includes a thermal management system according to an embodiment of the present application.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] FIG1 is a front view of a stator assembly according to an embodiment of the present application;

[0031] FIG2 is a schematic structural diagram of a stator assembly according to a first embodiment of the present application;

[0032] FIG3 is an axial view of FIG2;

[0033] FIG4 is a cross-sectional view taken along line AA of FIG3 ;

[0034] FIG5 is a cross-sectional view of a stator assembly according to a second embodiment of the present application;

[0035] FIG6 is a schematic structural diagram of a stator assembly according to a second embodiment of the present application;

[0036] FIG7 is an axial view of FIG6;

[0037] FIG8 is a partial cross-sectional view of an electronic water pump according to an embodiment of the present application;

[0038] FIG9 is a schematic diagram of a vehicle according to an embodiment of the present application.

[0039] Reference numerals:

[0040] Vehicle 1000; thermal management system 300; electronic water pump 200; stator assembly 100;

[0041] Stator core 10; avoidance groove 101; first slot section 102; second slot section 103;

[0042] Housing 21; first sealing portion 211; second sealing portion 212; third sealing portion 213;

[0043] Insulating bracket 30; bracket positioning hole 301; first hole section 302; second hole section 303; wiring gap 304; sealing groove 305; connecting surface 306; bracket body 31; core insulation portion 311; first baffle insulation portion 312; second baffle insulation portion 313; tooth positioning hole 314; positioning column 32; column reinforcement rib 33; reinforcement portion 34; limiting portion 35; wire blocking portion 36; wiring groove 361;

[0044] Stator winding 40 . Modes for Carrying Out the Invention

[0045] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In the description of this application, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0048] In related technologies, the insulating bracket of the stator assembly only serves the purpose of insulation and auxiliary winding, isolating the stator winding from the stator core. The insulating bracket has an outer baffle for wiring and a terminal slot for installing terminals. The function of this insulating bracket is relatively simple and cannot provide additional functions for subsequent processes to reduce costs. After the stator assembly of the electronic water pump is assembled, the stator core needs to be fixed by the outer circle of the stator core and covered with plastic casing. Then, the outer circle matching area of ​​the clamped stator core needs to be sealed by glue injection, welding, or adding a back cover. The process is complicated and costly.

[0049] Based on this, the present application proposes a stator assembly 100 of an electronic water pump 200. The insulating bracket 30 of the stator assembly 100 adds a positioning column 32 to expand the function of the insulating bracket 30. It can be used to support and position the stator assembly 100 in the subsequent injection molding process of the casing 21 without using the stator core 10 for support and positioning. This is beneficial to eliminating the sealing process after the casing 21 is formed, simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump 200.

[0050] Hereinafter, an electronic water pump 200 and a stator assembly 100 of the electronic water pump 200 according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0051] 1-8 , an electronic water pump 200 according to an embodiment of the present application may include a stator assembly 100 of the electronic water pump 200 according to an embodiment of the present application. The electronic water pump 200 may further include a housing 21, which is injection-molded around the stator assembly 100. The stator assembly 100 of the electronic water pump 200 according to an embodiment of the present application includes a stator core 10 and an insulating bracket 30.

[0052] Specifically, the insulating bracket 30 includes a bracket body 31 and a positioning post 32. The bracket body 31 encases the stator core 10. The positioning post 32 is disposed within the bracket body 31 and defines an axially extending bracket positioning hole 301. The wall of the bracket positioning hole 301 is spaced a predetermined distance from the stator core 10. The bracket positioning hole 301 is used to support and position the stator assembly 100 during injection molding of the housing 21 of the electronic water pump 200.

[0053] The insulating bracket 30 can be an injection molded body and injection molded around the stator core 10. The insulating bracket 30 can also be molded separately and then assembled with the stator core 10. The injection molded body means that the insulating bracket 30 can be injection molded as a whole, that is, the bracket body 31 and the positioning column 32 are obtained by injection molding in one step, and the injection molding connection between the insulating bracket 30 and the stator core 10 is achieved at the same time. During the production of the stator assembly 100, the stator core 10 can be placed in a mold for injection molding the insulating bracket 30, and then poured. After cooling, the mold is demolded to obtain the insulating bracket 30 injection-molded around the stator core 10. The stator winding 40 of the stator assembly 100 can then be wound around the insulating bracket 30.

[0054] For example, as shown in Figures 2 and 4 , the bracket body 31 is provided with a tooth positioning hole 314. A portion of the axial end surface of the stator tooth of the stator core 10 is opposite to the tooth positioning hole 314 and is exposed through the tooth positioning hole 314. The axial end surface of the tooth shoe of the stator core 10 is at least partially exposed from the insulating bracket 30. During the injection molding process of the insulating bracket 30, the mold's positioning fixture can be supported by the axial end surface of the stator tooth and the axial end surface of the tooth shoe to achieve axial, radial, and circumferential support and positioning of the stator core 10. After injection molding and demolding, the positioning fixture is removed, forming the exposed end surface of the tooth and the exposed end surface of the tooth shoe.

[0055] By cooperating with the exposed end faces of the teeth and the exposed end faces of the tooth boots, the positioning of the insulating bracket 30 during injection molding does not rely on the outer peripheral surface of the stator core 10. Therefore, the outer peripheral surface of the stator core 10 does not need to be exposed to the insulating bracket 30, thereby reducing the exposed area of ​​the stator core 10 and improving the sealing effect of the casing 21 after injection molding.

[0056] A positioning post 32 is provided on the bracket body 31 and is provided with an axially extending bracket positioning hole 301. The positioning post 32 can be provided on one axial side of the bracket body 31, or radially outward of the bracket body 31, as long as the positioning post 32 is connected to the bracket body 31. The bracket positioning hole 301 can be a through hole or a blind hole. It is sufficient that the wall of the bracket positioning hole 301 is spaced a predetermined distance from the stator core 10, that is, the bracket positioning hole 301 does not expose the stator core 10. The positioning post 32 serves to isolate the stator core 10 from the external moisture environment.

[0057] The bracket positioning hole 301 extends along the axial direction of the stator core 10, so that during the injection molding process of the housing 21, the mold positioning tool can be inserted into the bracket positioning hole 301 to cooperate with the hole wall to achieve axial, radial and circumferential support and positioning of the stator assembly 100, so that the stator assembly 100 is supported and positioned stably. The insulating bracket 30 integrates the function of supporting and positioning the stator assembly 100 during the injection molding process of the housing 21, without the need for support and positioning by the structure on the stator core 10, and the stator core 10 is not exposed at the bracket positioning hole 301. Therefore, after the injection molding process of the housing 21, the outer surface of the stator core 10 can be completely wrapped, and the stator core 10 has no exposed area. Therefore, the sealing process of blocking the exposed area of ​​the stator core 10 can be omitted, simplifying the production process and reducing production costs.

[0058] Moreover, in the scheme of positioning the injection-molded casing by the stator core in the related art, the splicing gap between the outer peripheral surface of the stator core and the insulating bracket and the casing is longer, while the volume of the positioning column 32 of the present application can be smaller, so the splicing gap with the casing 21 can be smaller, thereby reducing the risk of failure of the injection molding seal of the casing 21 and water vapor penetrating into the stator core 10 from the splicing gap, thereby improving the sealing reliability.

[0059] According to the electronic water pump 200 of the embodiment of the present application, a positioning column 32 is provided through an insulating bracket 30. The positioning column 32 has a bracket positioning hole 301 whose hole wall is separated from the stator core 10. The insulating bracket 30 expands the function of supporting and positioning the stator assembly 100 in cooperation with the mold during the injection molding process of the housing 21, without the need to use the stator core 10 for support and positioning. Moreover, no subsequent sealing process is required after the housing 21 is formed, which is conducive to simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump 200.

[0060] According to the embodiment of the present application, the electronic water pump 200 includes a stator assembly 100 of the electronic water pump 200 according to the embodiment of the present application. Since the stator assembly 100 of the electronic water pump 200 according to the embodiment of the present application has the above-mentioned beneficial technical effects, according to the electronic water pump 200 according to the embodiment of the present application, a positioning column 32 is provided through an insulating bracket 30, and the positioning column 32 has a bracket positioning hole 301 whose hole wall is separated from the stator core 10, so that the insulating bracket 30 expands the function of supporting and positioning the stator assembly 100 in cooperation with the mold during the injection molding process of the housing 21, without the need to use the stator core 10 for support and positioning, and no subsequent sealing process is required after the housing 21 is formed, which is conducive to simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump 200.

[0061] In some embodiments, as shown in FIG. 2 and FIG. 3 , there are a plurality of bracket positioning holes 301 , and the plurality of bracket positioning holes 301 are spaced apart along the circumference of the stator core 10 .

[0062] It is worth noting that the multiple bracket positioning holes 301 can be formed separately on multiple positioning posts 32, or multiple bracket positioning holes 301 can be provided on a single positioning post 32. For example, there can be two, three, or four bracket positioning holes 301. The multiple bracket positioning holes 301 are arranged at intervals along the circumference of the stator core 10. This should be understood in a broad sense. For example, the multiple bracket positioning holes 301 may be arranged in the circumferential direction of the stator core 10, with the angles between any two adjacent bracket positioning holes 301 about the centerline of the stator core 10 being equal or unequal; or, the multiple bracket positioning holes 301 may be an even number and may be symmetrical about the centerline of the stator core 10.

[0063] By providing a plurality of spaced-apart bracket positioning holes 301, the stability of the support and positioning of the stator assembly 100 during the injection molding process can be improved, and a good positioning effect can be achieved. The stator assembly 100 is not prone to deflection, thereby improving the accuracy of the injection molding connection between the housing 21 and the stator assembly 100 and improving the performance of the electronic water pump 200.

[0064] In other embodiments, there can be only one bracket positioning hole 301, and the cross-section of the bracket positioning hole 301 perpendicular to the axial direction of the stator core 10 can be non-circular, for example, it can be a waisted circle, an ellipse, a polygon or other non-circular shape, and the non-circular shape is used to limit the positioning of the insulating bracket 30 in the rotation direction during the injection molding of the housing 21.

[0065] In the embodiment where there are multiple bracket positioning holes 301 , the cross-section of the bracket positioning hole 301 perpendicular to the axial direction of the stator core 10 may be circular or non-circular.

[0066] According to some embodiments of the present application, as shown in Figures 4 and 5, the bracket positioning hole 301 includes a first hole segment 302 and a second hole segment 303, the second hole segment 303 is located on the side of the first hole segment 302 close to the end opening of the bracket positioning hole 301, and the cross-sectional area of ​​the second hole segment 303 perpendicular to the depth direction of the bracket positioning hole 301 is greater than the cross-sectional area of ​​the first hole segment 302 perpendicular to the depth direction of the bracket positioning hole 301.

[0067] The first hole segment 302 and the second hole segment 303 may be cylindrical holes with a cross section at the center of a circle, or holes with a cross section in any shape such as a triangle, a polygon, or an ellipse.

[0068] The cross-sectional area of ​​the second hole segment 303 perpendicular to the depth direction of the bracket positioning hole 301 (i.e., the arrangement direction of the first hole segment 302 and the second hole segment 303) is greater than the cross-sectional area of ​​the first hole segment 302 perpendicular to the depth direction of the bracket positioning hole 301, so that the first hole segment 302 and the second hole segment 303 constitute a stepped hole. For example, the first hole segment 302 and the second hole segment 303 shown in Figures 4 and 5 are cylindrical holes with different diameters and coaxially arranged, and the inner circumferential surfaces of the first hole segment 302 and the second hole segment 303 are connected by an annular connecting surface 306.

[0069] The stepped hole allows the positioning fixture of the mold to cooperate with the hole wall of the first hole section 302 with a smaller cross-sectional area to achieve the positioning of the stator assembly 100 during the injection molding process of the housing 21, and the positioning fixture can be separated from the hole wall of the second hole section 303 with a larger cross-sectional area, so that the rubber enters between the hole wall of the second hole section 303 and the positioning fixture. The finally formed housing 21 can be partially located in the second hole section 303 and connected to the hole wall of the second hole section 303, which is beneficial to improve the sealing of the connection between the insulating bracket 30 at the positioning column 32 and the housing 21.

[0070] In some specific embodiments, as shown in FIG8 , the housing 21 is an injection molded body and is injection molded around the insulating bracket 30. The housing 21 includes a first sealing portion 211 and a second sealing portion 212 connected to each other. The first sealing portion 211 is located along the circumferential extension of the positioning column 32 and is connected to at least a portion of the outer peripheral surface of the positioning column 32. The second sealing portion 212 is located outside the bracket positioning hole 301, and the second sealing portion 212 is sealed and connected to the end opening edge of the bracket positioning hole 301. The first sealing portion 211 and the second sealing portion 212 can also be used to connect with other parts of the housing 21. Thus, at the positioning column 32, the housing 21 can at least form a seal with an L-shaped cross-section. Even if the seal fails at the joint between the housing 21 and the positioning column 32, it is not easy for external liquid to penetrate through the L-shaped seal to the stator winding 40 and the stator core 10, thereby improving the sealing reliability.

[0071] In some embodiments, as shown in FIG8 , the housing 21 may further include a third sealing portion 213 connected to the second sealing portion 212. The third sealing portion 213 extends along the inner circumference of the bracket positioning hole 301 and is sealingly connected to at least a portion of the inner circumference of the bracket positioning hole 301, such as being located within and connected to the inner circumference of the second hole section 303. The first sealing portion 211, the second sealing portion 212, and the third sealing portion 213 form a seal with a U-shaped cross-section. If a seal failure occurs at the joint between the housing 21 and the positioning post 32 (i.e., the joint between the third sealing portion 213 and the connecting surface 306), external liquid is unlikely to penetrate through the U-shaped seal and reach the stator winding 40 and the stator core 10, further improving the sealing effect.

[0072] In addition, the inner circumference of the second hole section 303 may further be provided with a sealing groove 305, into which part of the third sealing portion 213 is embedded, thereby further improving the sealing effect. Here, the sealing groove 305 may be an annular groove or a threaded groove extending along the circumference of the second hole section 303.

[0073] In the embodiment of the present application, the location and depth of the bracket positioning hole 301 can be flexibly set.

[0074] For example, in some embodiments, as shown in Figures 2 to 4, the bracket positioning hole 301 is located on one axial side of the stator core 10. In other words, the bracket positioning hole 301 and the projection of the stator core 10 perpendicular to the axial direction do not overlap, so that the outer diameter of the stator core 10 does not interfere with the setting position of the bracket positioning hole 301. Therefore, the addition of the positioning column 32 and the bracket positioning hole 301 to the insulating bracket 30 does not require any structural improvement to the stator core 10, which can reduce the production cost of the stator core 10. In addition, the bracket positioning hole 301 is unlikely to have an adverse effect on the performance of the stator core 10, and can be matched with stator cores 10 of different sizes, with strong adaptability.

[0075] It should be noted that, in the embodiment where the bracket positioning hole 301 is located on the axial side of the stator core 10, the positioning column 32 can be located on the axial side of the bracket body 31; the positioning column 32 can also be located on the radial outside of the bracket body 31 and partially extend to the axial side of the bracket body 31, and the depth of the bracket positioning hole 301 is less than the axial length of the positioning column 32, which is all within the scope of protection of the present application.

[0076] For another example, in other embodiments, as shown in FIG. 5-FIG . 7 , a portion of the bracket positioning hole 301 is located radially outside the stator core 10 , and another portion of the bracket positioning hole 301 is located axially on one side of the stator core 10 .

[0077] A portion of the bracket positioning hole 301 is located radially outside the stator core 10, which means that the radial projections of this portion of the bracket positioning hole 301 and the stator core 10 overlap; another portion of the bracket positioning hole 301 is located on the axial side of the stator core 10, which means that the radial projections of this portion of the bracket positioning hole 301 and the stator core 10 do not overlap; wherein the radial projection refers to the projection of the arrangement direction of the center line of the bracket positioning hole 301 and the center line of the stator core 10.

[0078] In the above embodiment, the axial length of the bracket positioning hole 301 is longer, allowing for a greater fit with the positioning tooling during the injection molding of the housing 21, thereby improving positioning reliability. Furthermore, the portion of the bracket positioning hole 301 radially outward from the stator core 10 can be reinforced by the stator core 10, enhancing support and positioning capabilities and making it suitable for injection molding solutions with higher impact forces.

[0079] In some specific embodiments, as shown in Figures 5 and 7 , the outer circumferential surface of the stator core 10 is provided with an escape groove 101, and a portion of the bracket positioning hole 301 is located within the escape groove 101. Accordingly, the wall surface of the portion of the bracket positioning hole 301 is located within the escape groove 101, that is, a portion of the positioning post 32 is located within the escape groove 101. This not only improves the strength of the positioning post 32 by utilizing the stator core 10, but also reduces the radial space occupied by the positioning post 32, reducing the overall radial dimension of the insulating bracket 30, and facilitating the miniaturization of the electronic water pump 200.

[0080] In some specific embodiments, as shown in FIG. 5 , the avoidance groove 101 includes a first groove section 102 and a second groove section 103 extending axially, part of the bracket positioning hole 301 is located in the first groove section 102 , and the insulating bracket 30 is embedded in the second groove section 103 .

[0081] The avoidance groove 101 can axially penetrate the axial end surfaces of the stator core 10, and the axial length of the avoidance groove 101 can also be less than the axial length of the stator core 10. Part of the bracket positioning hole 301 is located in the first slot segment 102, which means that the depth of the part of the bracket positioning hole 301 located radially outside the stator core 10 is equal to the depth of the first slot segment 102. The insulating bracket 30 is embedded in the second slot segment 103, which means that the second slot segment 103 does not have a hole structure such as the bracket positioning hole 301, but is completely filled with the rubber material of the insulating bracket 30. This can increase the connection surface 306 area between the insulating bracket 30 and the stator core 10 and improve the connection reliability.

[0082] According to some embodiments of the present application, as shown in Figures 2 and 6 , the positioning post 32 is at least partially located radially outside the bracket body 31 and connected to the bracket body 31. For example, as shown in Figure 2 , the positioning post 32 partially protrudes from the outer circumferential surface of the bracket body 31, so that the bracket body 31 and the positioning post 32 form a structure similar to that in which the positioning post 32 is partially embedded in the bracket body 31 and partially exposed from the bracket body 31, thereby enhancing the connection strength between the bracket body 31 and the positioning post 32.

[0083] Furthermore, the positioning post 32 is provided with column reinforcement ribs 33 on either side of the circumference of the bracket body 31. The column reinforcement ribs 33 are connected to the bracket body 31 and protrude from the outer circumference of the bracket body 31. The column reinforcement ribs 33 further enhance the connection strength between the positioning post 32 and the bracket body 31. For example, as shown in Figure 2, the column reinforcement ribs 33 may extend axially along the positioning post 32, protruding from the outer circumference of the bracket body 31, with one side of the column reinforcement rib 33 connected to the outer circumference of the positioning post 32.

[0084] Furthermore, during the injection molding process of the insulating bracket 30, the outer circumference of the bracket body 31 is wrapped by the mold's multiple arc sliders, each of which is positioned between two adjacent positioning posts 32. After the injection molding is completed, the arc sliders move radially outward to exit. By providing column reinforcement ribs 33, the arc sliders are spaced a certain distance from the positioning posts 32. The arc sliders are positioned between the two column reinforcement ribs 33 on the adjacent sides of the two positioning posts 32. The arc sliders and the sliders of the injection molding positioning posts 32 can be separate structures and can be withdrawn and demolded separately. Therefore, the arc sliders are not affected by the columnar structure of the positioning posts 32, making it easier to withdraw radially and achieve demolding.

[0085] In some embodiments of the present application, as shown in Figures 2-8 , the bracket body 31 includes a core insulation portion 311, a first baffle insulation portion 312, and a second baffle insulation portion 313. The core insulation portion 311 surrounds the stator core 10. The first baffle insulation portion 312 and the second baffle insulation portion 313 are located at the axial ends of the core insulation portion 311. The first baffle insulation portion 312 corresponding to the same stator tooth portion of the stator core 10 is located radially inward of the second baffle insulation portion 313. The first baffle insulation portion 312 forms an inner baffle, and the second baffle insulation portion 313 forms an outer baffle. The stator winding 40 can be wound around the core insulation portion 311 and positioned between the first baffle insulation portion 312 and the second baffle insulation portion 313 to facilitate installation and positioning of the stator winding 40 on the insulation bracket 30.

[0086] Furthermore, the positioning post 32 is at least partially located radially outward from the second baffle insulating portion 313, thereby increasing the distance between the positioning post 32 and the centerline of the insulating bracket 30. During the injection molding process of the housing 21, the positioning fixture, when in conjunction with the positioning post 32, can support and position the stator assembly 100 at a greater distance from the center of the insulating bracket 30, thereby further improving the support and positioning stability of the stator assembly 100.

[0087] In some embodiments, as shown in Figures 2-4, the positioning post 32 and the second baffle insulating portion 313 are radially spaced apart to form a wiring gap 304 between the positioning post 32 and the second baffle insulating portion 313. The lead wires of the stator winding 40 of the stator assembly 100 are at least partially located within the wiring gap 304. In other words, the stator winding 40 can pass through the wiring gap 304, and the lead wires are positioned by the second baffle insulating portion 313 and the positioning post 32. The lead wires are not easily interfered with or shaken by other structures, thereby improving the stability of the lead wires. In addition, after the housing 21 is injection molded, the first sealing portion 211 can fill the wiring gap 304 and cover the lead wires located within the wiring gap 304, thereby improving the insulation and waterproofing effect of the lead wires.

[0088] In some embodiments, as shown in Figures 2-4, a reinforcement portion 34 is provided in the wiring gap 304, connecting the positioning column 32 and the second baffle insulating portion 313. The reinforcement portion 34 can enhance the support function and reduce deformation of the positioning column 32.

[0089] In some embodiments, as shown in Figures 2-4 , in the axial direction of the stator core 10, the distance between the end face of the second baffle insulator 313, which is distal to the core insulator 311, and the distance between the end face of the positioning post 32, which is distal to the core insulator 311, and the core insulator 311 is H1, and the distance between the end face of the positioning post 32, which is distal to the core insulator 311, and the core insulator 311 is H2, where H1 and H2 are not equal. Thus, in the axial direction, a certain height difference can be formed between the second baffle insulator 313 and the positioning post 32. For example, if H1 is greater than H2, the second baffle insulator 313 is higher than the positioning post 32; if H1 is less than H2, the positioning post 32 is higher than the second baffle insulator 313. This height difference facilitates routing of lead wires within the routing gap 304. The lead wires can be moved along the higher side of the positioning post 32 or the second baffle insulator 313 into the routing gap 304, making routing of the lead wires more convenient and efficient.

[0090] In some specific embodiments, as shown in FIG2 , a stopper 35 is provided radially outwardly of the second baffle insulating portion 313. The stopper 35 is at least partially offset from the positioning post 32 in the circumferential direction, and the lead wire portion is located between the stopper 35 and the core insulating portion 311. The stopper 35 can axially limit the lead wire, confining it within the routing gap 304 and preventing it from slipping out. This improves the stability of the lead wire, particularly during the injection molding process of the housing 21.

[0091] It is worth noting that in an embodiment where there are multiple second baffle insulating parts 313 and multiple positioning posts 32, the second baffle insulating parts 313 corresponding to one or more positioning posts 32 can be provided with a limiting part 35, or multiple second baffle insulating parts 313 can be provided with a limiting part 35.

[0092] In other embodiments, as shown in Figures 5-7, the positioning column 32 is connected to the second baffle insulating portion 313, and the positioning column 32 is provided with a wire blocking portion 36 on the side radially facing away from the second baffle insulating portion 313. The wire blocking portion 36 defines a wiring groove 361, and the lead wires of the stator winding 40 of the stator assembly 100 are at least partially located in the wiring groove 361.

[0093] The connection between the positioning post 32 and the second baffle insulating portion 313 not only reduces the radial dimension of the stator assembly 100 but also improves the structural strength and support reliability of the positioning post 32. The provision of the wire retaining portion 36 and the wire routing groove 361 thereon allows the wire retaining portion 36 to position the lead wires, preventing them from shaking, thereby improving the injection molding wrapping effect of the lead wires during the injection molding process of the housing 21.

[0094] In some embodiments where the positioning column 32 is connected to the second baffle insulating portion 313, as shown in Figure 5, the outer peripheral surface of the stator core 10 can be provided with an avoidance groove 101, and the bracket positioning hole 301 can be at least partially located on one axial side of the stator core 10 and at least partially located in the avoidance groove 101, thereby improving the support positioning stability while reducing the radial dimension.

[0095] The electronic water pump 200 according to a specific embodiment of the present application is described in detail below with reference to the accompanying drawings. It is worth noting that the following description is merely illustrative and should not be construed as limiting the application.

[0096] As shown in Figures 1 to 4 and 8, the electronic water pump 200 according to some embodiments of the present application includes a housing 21, a stator assembly 100, and a rotor assembly. The stator assembly 100 includes a stator core 10, an insulating bracket 30, and a stator winding 40. The insulating bracket 30 includes a bracket body 31 and positioning posts 32 partially embedded in the outer circumference of the bracket body 31. There are three positioning posts 32, which are evenly spaced apart along the circumference of the bracket body 31. The bracket body 31 includes a core insulation portion 311 and a first baffle insulation portion 312 and a second baffle insulation portion 313. The core insulation portion 311 covers the stator core 10. The first baffle insulation portion 312 and the second baffle insulation portion 313 are arranged on both axial sides of the core insulation portion 311.

[0097] The positioning post 32 is connected to the core insulation portion 311, and one axial end of the positioning post 32 extends beyond the end surface of the core insulation portion 311. The extended portion is radially outward from and spaced from the second baffle insulation portion 313 to form a wiring gap 304. A bracket positioning hole 301 is defined in the extended portion of the positioning post 32. The bracket positioning hole 301 includes a first hole section 302 with a smaller aperture and a second hole section 303 with a larger aperture. The stator winding 40 is wound around the core insulation portion 311 and located between the first baffle insulation portion 312 and the second baffle insulation portion 313. The lead wires of the stator winding 40 are at least partially located within the wiring gap 304.

[0098] During the process of injection molding the housing 21, the end of the bracket positioning hole 301 can be opened downward, and the stator assembly 100 can be placed in the injection mold. The positioning tool of the mold extends into the bracket positioning hole 301. The positioning tool is supported on the bottom wall surface of the first hole segment 302 and contacts and cooperates with the inner circumferential surface of the first hole segment 302 to achieve axial, radial and circumferential support and positioning of the stator assembly 100.

[0099] The injection-molded housing 21 encapsulates the stator assembly 100 and seals the stator core 10. The housing 21 includes a first sealing portion 211, a second sealing portion 212, and a third sealing portion 213. The first sealing portion 211 is sealed to the outer circumference of the portion extending beyond the positioning post 32, and a portion of the first sealing portion 211 is located within the wiring gap 304. The second sealing portion 212 is sealed to the edge of the opening at the end of the bracket positioning hole 301, that is, sealed to the axial end face of the positioning post 32. The third sealing portion 213 is located within the second hole section 303 and is sealed to the inner circumference of the second hole section 303.

[0100] In the above embodiment, the insulating bracket 30 is additionally provided with a positioning post 32, which is used to support and position the stator assembly 100 during the subsequent injection molding process of the housing 21, and the wall surface of the bracket positioning hole 301 does not contact the stator core 10. In this way, after the injection molding is completed, the stator core 10 is not exposed at the positioning position, and the positioning post 32 serves to isolate the external moisture environment from the stator core 10, eliminating the need for a subsequent sealing process. In addition, the insulating bracket 30 can wrap the outer peripheral surface of the stator core 10, and the stator assembly 100 is supported and positioned only by the positioning post 32 during the injection molding process of the housing 21, reducing the exposed area of ​​other areas of the stator core 10, thereby reducing the area of ​​direct contact between the housing 21 and the stator core 10, which is beneficial to reducing the risk of the stator core 10 coming into contact with moisture due to failure of the housing 21 seal.

[0101] Furthermore, the connections between the positioning post 32 and the first, second, and third sealing portions 211, 212, and 213 form a U-shaped sealing structure. The exposed joint gap formed between the positioning post 32 and the third sealing portion 213 has a short extension, which helps reduce the risk of seal failure. Furthermore, the U-shaped sealing structure has a curved path. Even if the seal at the joint gap fails, moisture is unlikely to flow through the U-shaped path to the stator core 10 or stator winding 40, further improving the sealing effect.

[0102] As shown in FIG9 , the thermal management system 300 according to the embodiment of the present application includes the electronic water pump 200 according to the embodiment of the present application. Since the electronic water pump 200 according to the embodiment of the present application has the aforementioned beneficial technical effects, the thermal management system 300 according to the embodiment of the present application is configured by providing a positioning post 32 through the insulating bracket 30. The positioning post 32 has a bracket positioning hole 301 whose hole wall is separated from the stator core 10. This allows the insulating bracket 30 to expand its function of supporting and positioning the stator assembly 100 in conjunction with the mold during the injection molding process of the housing 21, without requiring the stator core 10 for support and positioning. Furthermore, no subsequent sealing process is required after the housing 21 is formed, which is beneficial for simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump 200.

[0103] In some embodiments, the thermal management system 300 is an important component for regulating the vehicle cabin environment (temperature, humidity, etc.) and the working environment of other components. The thermal management system 300 mainly includes: valves, heat exchangers, compressors and pumps. Pumps such as the electronic water pump 200 or other water pumps. The thermal management system 300 has a circulating refrigerant, which can be liquid antifreeze or carbon dioxide refrigerant, etc.

[0104] As shown in FIG9 , a vehicle 1000 according to an embodiment of the present application includes a thermal management system 300 according to an embodiment of the present application. Because the thermal management system 300 according to an embodiment of the present application has the aforementioned beneficial technical effects, the vehicle 1000 according to an embodiment of the present application is provided with a positioning post 32 via an insulating bracket 30. The positioning post 32 has a bracket positioning hole 301 whose hole wall is separated from the stator core 10. This allows the insulating bracket 30 to expand its function of supporting and positioning the stator assembly 100 in conjunction with the mold during the injection molding process of the housing 21, without requiring the stator core 10 for support and positioning. Furthermore, after the housing 21 is formed, no subsequent sealing process is required, which is beneficial for simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump 200.

[0105] Among them, vehicle 1000 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with an electric motor as the main driving force. In other embodiments, the new energy vehicle can also be a hybrid vehicle with an internal combustion engine and an electric motor as the main driving force. Regarding the internal combustion engine and the electric motor mentioned in the above embodiments that provide driving power for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the electric motor can use power batteries, hydrogen fuel cells, etc., and there is no special limitation here. It should be noted that this is only an exemplary description of the structure of new energy vehicles, etc., and it does not limit the scope of protection of this application.

[0106] Other structures and operations of the thermal management system 300 and the vehicle 1000 according to the embodiment of the present application are well known to those skilled in the art and will not be described in detail here.

[0107] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0108] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

[0109] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A stator assembly of an electronic water pump, wherein: include: stator core; An insulating bracket includes a bracket body and a positioning column. The bracket body wraps the stator core. The positioning column is arranged on the bracket body and is provided with a bracket positioning hole extending axially. The hole wall of the bracket positioning hole is spaced a predetermined distance from the stator core. The bracket positioning hole is used to support and position the stator assembly when injection molding the housing of the electronic water pump.

2. The stator assembly of the electronic water pump according to claim 1, wherein: The bracket positioning hole includes a first hole segment and a second hole segment, the second hole segment is located on a side of the first hole segment close to the end opening of the bracket positioning hole, and the cross-sectional area of ​​the second hole segment perpendicular to the depth direction of the bracket positioning hole is larger than the cross-sectional area of ​​the first hole segment perpendicular to the depth direction of the bracket positioning hole.

3. The stator assembly of the electronic water pump according to claim 1 or 2, wherein: The bracket positioning hole is located on one axial side of the stator core.

4. The stator assembly of the electronic water pump according to claim 1 or 2, wherein: A portion of the bracket positioning hole is located on the radial outer side of the stator core, and another portion of the bracket positioning hole is located on one axial side of the stator core.

5. The stator assembly of the electronic water pump according to claim 4, wherein: An avoidance groove is provided on the outer peripheral surface of the stator core, and part of the bracket positioning holes is located in the avoidance groove.

6. The stator assembly of the electronic water pump according to claim 5, wherein: The avoidance groove includes a first groove section and a second groove section extending in the axial direction, part of the bracket positioning hole is located in the first groove section, and the insulating bracket is embedded in the second groove section.

7. The stator assembly of the electronic water pump according to any one of claims 1 to 6, wherein: The positioning column is at least partially located radially outside the bracket body and connected to the bracket body. The positioning column is provided with column reinforcement ribs on both sides along the circumference of the bracket body. The column reinforcement ribs are connected to the bracket body and protrude from the outer peripheral surface of the bracket body.

8. The stator assembly of the electronic water pump according to any one of claims 1 to 7, wherein: The bracket body includes a core insulation portion, a first baffle insulation portion and a second baffle insulation portion. The core insulation portion wraps the stator core. The first baffle insulation portion and the second baffle insulation portion are arranged at the axial ends of the core insulation portion, and the first baffle insulation portion corresponding to the same stator tooth portion of the stator core is located radially inside the second baffle insulation portion, and the positioning column is at least partially located radially outside the second baffle insulation portion.

9. The stator assembly of the electronic water pump according to claim 8, wherein: The positioning column and the second baffle insulating portion are radially spaced apart to form a wiring gap, and the lead wires of the stator winding of the stator assembly are at least partially located in the wiring gap.

10. The stator assembly of the electronic water pump according to claim 9, wherein: A reinforcement portion is provided in the wiring gap, and the reinforcement portion connects the positioning column and the second baffle insulating portion.

11. The stator assembly of the electronic water pump according to claim 9 or 10, wherein: In the axial direction of the stator core, the distance between the end face of the second baffle insulation portion away from the core insulation portion and the core insulation portion is H1, and the distance between the end face of the positioning column away from the core insulation portion and the core insulation portion is H2, and H1 and H2 are not equal.

12. The stator assembly of the electronic water pump according to any one of claims 9 to 11, wherein: A limiting portion is provided radially outside the second baffle insulating portion. The limiting portion and the positioning column are at least partially staggered in the circumferential direction. The lead wire portion is located between the limiting portion and the core insulating portion.

13. The stator assembly of the electronic water pump according to claim 8, wherein: The positioning column is connected to the second baffle insulating portion. The positioning column is provided with a wire blocking portion on the side facing away from the second baffle insulating portion in the radial direction. The wire blocking portion defines a wire routing groove. The lead wire of the stator winding of the stator assembly is at least partially located in the wire routing groove.

14. The stator assembly of the electronic water pump according to any one of claims 1 to 13, wherein: There are multiple bracket positioning holes and they are spaced apart along the circumference of the stator core; or there is only one bracket positioning hole and the cross section of the bracket positioning hole perpendicular to the axial direction of the stator core is non-circular.

15. An electronic water pump, wherein: A stator assembly comprising the electronic water pump according to any one of claims 1-14.

16. A thermal management system, wherein: Comprising the electronic water pump according to claim 15.

17. A vehicle, wherein: Comprising the thermal management system of claim 16.

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