Electric water pumps and vehicles

Abstract

This invention discloses an electronic water pump and a vehicle. The electronic water pump includes a housing and a stator assembly partially disposed within the housing. The stator assembly includes a stator core, an insulating frame, multiple pins, windings, a stator injection molded body, and a fixing plate. The insulating frame is located at least at one end of the stator core along its axial direction. The multiple pins are arranged at intervals, with one end of each pin connected to the insulating frame. The windings are wound around the teeth of the stator core, and the leads of the windings are connected to the pins. The stator injection molded body covers one end of each pin, the windings, the insulating frame, and the stator core. The fixing plate is disposed on the insulating frame and covered by the housing and the stator injection molded body. One end of each pin passes through the housing, the fixing plate, and the stator injection molded body and connects to the insulating frame. The electronic water pump of this invention can effectively protect the pins from deformation, improve production efficiency, and reduce the defect rate.

Description

Technical Field

[0001] This invention relates to the field of water pump technology, and more specifically, to an electronic water pump and a vehicle having the electronic water pump. Background Technology

[0002] Electronic water pumps are widely used due to their advantages of precise control and high efficiency.

[0003] In related technologies, an electronic water pump includes a housing, a stator injection molded body, a stator core, an insulating frame, and pins, with at least one end of the pins passing through the housing and the stator injection molded body and engaging with the insulating frame. Summary of the Invention

[0004] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0005] Through research, the inventors discovered that during the production of electronic water pumps, the stator is injection molded. During the manufacturing process of the stator, the pins are easily deformed, and the solder joints are easily impacted by the high-temperature and high-pressure injection plastic, which can easily lead to poor soldering and open circuits, resulting in a high defect rate. Furthermore, after injection molding, overflow and burrs are easily formed, increasing the cleaning process and reducing production efficiency.

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of the present invention propose an electronic water pump that can effectively protect the pins from deformation, improve production efficiency, and reduce the defect rate.

[0008] An embodiment of the present invention also proposes a vehicle.

[0009] An electronic water pump according to a first aspect of the present invention includes a housing and a stator assembly partially disposed within the housing. The stator assembly includes: a stator core; an insulating frame disposed at least at one axial end of the stator core; a plurality of pins spaced apart, at least one end of a portion of the pins being connected to the insulating frame; a winding wound around the teeth of the stator core, the leads of the winding being connected to the pins; a stator injection molded body covering one end of the pins, the winding, the insulating frame, and the stator core; and a fixing plate disposed on the side of the insulating frame away from the stator core, a portion of the fixing plate being located within the housing, and another portion of the fixing plate being located within the stator injection molded body, wherein one end of the at least some pins passes through the housing, the fixing plate, and the stator injection molded body and is connected to the insulating frame.

[0010] The electronic water pump of this invention, through the cooperation of a fixed plate and an insulating frame, enables multiple pins to be securely connected to the insulating frame, enhancing the connection strength between the pins and the insulating frame, preventing pin deformation, and limiting the position of the pins during the production process. This effectively protects the solder joints between the pins and the windings, preventing issues such as poor soldering and open circuits caused by the impact of high temperature and high pressure on the solder joints during injection molding. During mold entry, the cooperation between the pins and the fixed plate assists in the rapid positioning of the injection molded part with the corresponding inserts within the mold, preventing material overflow and burr formation near the pins during BMC (bulk molding compound) molding, effectively improving production efficiency and reducing the defect rate.

[0011] In some embodiments, the fixing plate includes a body and a first boss protruding from the body in a direction away from the stator injection body. The fixing plate has a plurality of through holes, at least a portion of which penetrate from the side of the first boss away from the body along the axial direction of the stator core through the first boss and the body. The pin passes through the fixing plate through the through holes.

[0012] In some embodiments, the first boss includes a plurality of spaced-apart frustum portions and a connecting portion connecting adjacent frustum portions, and at least a portion of the plurality of through holes penetrates the frustum portions and the body.

[0013] In some embodiments, there are three frustum portions, namely a first frustum portion, a second frustum portion, and a third frustum portion; there are two connecting portions, namely a first connecting portion and a second connecting portion; the first connecting portion connects the first frustum portion and the second frustum portion, and the second connecting portion connects the second frustum portion and the third frustum portion; there are three through holes, namely a first through hole, a second through hole, and a third through hole; the first through hole penetrates the first frustum portion and the body; the second through hole penetrates the second frustum portion and the body; and the third frustum portion penetrates the body.

[0014] In some embodiments, the body is generally an arc-shaped plate.

[0015] In some embodiments, a plurality of the frustum portions are arranged at intervals along the length direction of the body, and the connecting portion extends substantially along the length direction of the body.

[0016] In some embodiments, the body includes a first end face and a second end face arranged opposite to each other in its length direction, and a first side face and a second side face arranged opposite to each other in its width direction. The first side face of the body is provided with a protrusion adjacent to the first end face of the body. The fixing plate further includes a second boss arranged at a distance from the first boss. The second boss is connected to the body and the protrusion. A portion of the plurality of through holes passes through the first boss and the body, and another portion of the plurality of through holes passes through the second boss and the body and / or the protrusion.

[0017] In some embodiments, the outer periphery of the second boss is circular, and there is only one second boss.

[0018] In some embodiments, the single-sided gap between the pin and the inner wall of the through hole is 0.03 mm to 0.05 mm.

[0019] The vehicle according to an embodiment of the second aspect of the present invention includes the electronic water pump described in any of the above embodiments. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of an electronic water pump according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the stator assembly structure of the electronic water pump according to an embodiment of the present invention.

[0022] Figure 3 This is another schematic diagram of an electronic water pump according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the internal structure of the stator injection molded body of the electronic water pump according to an embodiment of the present invention.

[0024] Figure 5 This is an exemplary structural diagram of the fixing plate of the electronic water pump according to an embodiment of the present invention.

[0025] Figure 6 yes Figure 5 Side view of an exemplary structure of the central fixing plate.

[0026] Figure 7 This is another exemplary structural diagram of the fixing plate of the electronic water pump according to an embodiment of the present invention.

[0027] Figure 8 yes Figure 7 A side view of another exemplary structure of the central fixing plate.

[0028] Figure 9 This is a top view of the electronic water pump according to an embodiment of the present invention. Attached image description:

[0030] Housing 1, stator assembly 2, stator core 21, insulating frame 22, pin 23, winding 24, stator injection body 25, fixing plate 26, body 261, first boss 262, first frustum 2621, second frustum 2622, third frustum 2623, first connecting part 2624, second connecting part 2625, through hole 263, first end face 264, second end face 265, first side face 266, second side face 267, protrusion 268, second boss 269. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figure 1-9 As shown, the electronic water pump according to an embodiment of the present invention includes a housing 1 and a stator assembly 2 partially disposed inside the housing 1.

[0033] The stator assembly 2 includes a stator core 21, an insulating frame 22, a winding 24, a stator injection molded body 25, a fixing plate 26, and multiple pins 23.

[0034] The insulating frame 22 is provided at least in the stator core 21 along the axial direction of the stator core 21 (e.g., Figure 2 One end in the vertical direction (as described above). For example... Figure 3 and Figure 4 As shown, the upper and lower ends of the stator core 21 are provided with insulating frames 22.

[0035] Multiple pins 23 are arranged at intervals, and at least some of the pins 23 have one end connected to the insulating frame 22. For example... Figure 4 As shown, the lower end of each pin 23 is connected to the insulating frame 22 at the upper end of the stator core 21.

[0036] The winding 24 is wound around the teeth of the stator core 21, and the lead wire of the winding 24 is connected to the pin 23. The stator injection molded body 25 covers one end of the pin 23, the winding 24, the insulating frame 22 and the stator core 21. The fixing plate 26 is provided on the insulating frame 22, and the fixing plate 26 is covered by the housing 1 and the stator injection molded body 25. The aforementioned end of the pin 23 passes through the housing 1, the fixing plate 26 and the stator injection molded body 25 and is connected to the insulating frame 22.

[0037] like Figure 1 and Figure 2 As shown, the stator core 21, insulation frame 22, winding 24, stator injection molded body 25 and fixing plate 26 are disposed inside the housing 1, and a part of the pin 23 is located inside the housing 1.

[0038] Specifically, if Figure 1 and Figure 2 As shown, the fixing plate 26 is located on the upper side of the insulating frame 24. The upper part of the fixing plate 26 is located inside the housing 1, and the lower part of the fixing plate 26 is located inside the stator injection body 25. At least some of the pins 23 have their lower ends passing through the housing 1, the fixing plate 26, the stator injection body 25, and the insulating frame 22 for connection.

[0039] The inventors discovered through research that the electronic water pump undergoes two injection molding processes during manufacturing: the first injection molding forms the stator body, and the second injection molding forms the shell. Furthermore, at least some of the pins 23 and the leads of the winding 24 are welded together. During the second injection molding process to form the shell, the high-temperature, high-pressure injection plastic can easily impact the pins 23 and the weld points between the pins 23 and the winding 24, causing the pins 23 to deform and potentially leading to poor soldering and open circuits between the pins 23 and the winding 24. Therefore, this application uses a fixing plate 26 to fix the pins 23, preventing deformation. The fixing plate 26 also affects the flow of the injection plastic, preventing direct impact on the weld points between the pins 23 and the winding 24, thus avoiding poor soldering and open circuits and improving the reliability of the connection between the pins 23 and the winding 24.

[0040] According to an embodiment of the present invention, the electronic water pump uses a fixing plate 26 to cooperate with an insulating frame 22 to support and fix the pins 23, thereby enabling multiple pins 23 to be stably connected to the insulating frame 22, thereby enhancing the connection strength between the pins and the insulating frame 22 and preventing the pins 23 from deforming.

[0041] In the production process, the fixing plate 26 can limit the position of the pin 23, thereby effectively protecting the solder joint between the pin 23 and the winding 24, and avoiding the problem of poor soldering and open circuit caused by the impact of high temperature and high pressure on the solder joint between the pin 23 and the winding 24 during injection molding.

[0042] When the injection body is placed into the mold, the pin 23 is fixed by the fixing plate 26. The pin 23 can assist the injection body in quickly positioning with the corresponding insert in the mold. This avoids the plastic material overflowing near the pin 23 and forming excess material burrs when the shell 1 is molded. This can effectively improve production efficiency and reduce product defect rate.

[0043] In some embodiments, the fixing plate 26 includes a body 261 and a first boss 262 protruding upward on the body 261. The fixing plate 26 has a plurality of through holes 263, at least a portion of which penetrates downward from the upper surface of the first boss 262 through the first boss 262 and the body 261. Figure 5-8As shown, at least part of the through hole 263 extends downward from the upper surface of the first boss 262 and extends to the bottom of the body 261 to pass through the first boss 262 and the body 261.

[0044] In some embodiments, the first boss 262 includes a plurality of spaced-apart frustum portions and a connecting portion connecting adjacent frustum portions, and at least a portion of a plurality of through holes 263 penetrates the frustum portions and the body 261.

[0045] In some specific embodiments, such as Figure 5 and Figure 6 As shown, there are three frustum sections, namely, the first frustum section 2621, the second frustum section 2622, and the third frustum section 2623. There are two connecting sections, namely, the first connecting section 2624 and the second connecting section 2625. The first connecting section 2624 connects the first frustum section 2621 and the second frustum section 2622, and the second connecting section 2625 connects the second frustum section 2622 and the third frustum section 2623. There are three through holes 263, namely, the first through hole, the second through hole, and the third through hole. The first through hole penetrates the first frustum section 2621 and the body 261, the second through hole penetrates the second frustum section 2622 and the body 261, and the third through hole penetrates the third frustum section 2623 and the body 261.

[0046] Specifically, such as Figure 5 In the embodiment shown, the fixing plate 26 is provided with three pins 23, which correspond one-to-one with the first through hole 2631, the second through hole 2632 and the third through hole 2633 respectively, and all three pins 23 are phase pins.

[0047] Therefore, the electronic water pump of the present invention can enhance the stability of the connection between the fixing plate 26 and the pin 23 by providing a first protrusion 262 on the fixing plate 26. At the same time, the first protrusion 262 can protect the body 261 to a certain extent and increase the service life of the fixing plate 26. By providing the connecting part, the overall strength of the frustum part is enhanced, thereby further strengthening the overall strength of the fixing plate 26 and increasing the service life of the product.

[0048] In some embodiments, the body 261 is generally an arc-shaped plate, with a plurality of frustum portions arranged at intervals along the length of the body 261, and the connecting portion extending generally along the length of the body 261.

[0049] According to an embodiment of the present invention, the electronic water pump, by generally setting the body 261 as an arc-shaped plate, the curvature of the arc curve of the arc plate is the same as the curvature of the winding curve, makes the fit between the pin 23 and the fixed plate 26 more convenient, and at the same time makes the fit between the pin 23 and the fixed plate 26 more stable, avoids the deformation of the pin, and can reduce the pressure and impact generated during the injection molding of the stator injection body, thus avoiding the occurrence of poor soldering and open circuit.

[0050] It is understood that this application is not limited to Figure 5 and Figure 6 The illustrated embodiments, such as in other embodiments, are as follows: Figure 7 and Figure 8 As shown, the body 261 includes a first end face 264 and a second end face 265 arranged opposite to each other in its length direction. The body 261 also includes a first side face 266 and a second side face 267 arranged opposite to each other in its width direction. The first side face 266 of the body 261 is provided with a protrusion 268, which is adjacent to the first end face 264 of the body 261.

[0051] The fixing plate 26 also includes a second boss 269 spaced apart from the first boss 262. The second boss 269 is connected to the body 261 and the protrusion 268. The through hole 263 also includes a fourth through hole. The first through hole passes through the first frustum portion 2621 and the body 261. The second through hole passes through the second frustum portion 2622 and the body 261. The third through hole passes through the third frustum portion 2623 and the body 261. The fourth through hole passes through the second boss 269 and the body and / or the protrusion 268.

[0052] like Figure 7 and Figure 8 As shown, the second boss 269 is located at the connection between the body 261 and the protrusion 268, and the fourth through hole penetrates the second boss 269 and the connection between the body 261 and the protrusion 268. It is understood that this application is not limited to this; for example, the second boss 269 may be located on the protrusion 268, and another portion of the multiple through holes 263 may penetrate both the second boss 269 and the protrusion 268; or, for example, the second boss 269 may be located on the body 261, and another portion of the multiple through holes 263 may penetrate both the second boss 269 and the body 261.

[0053] Preferably, the outer periphery of the second boss 269 is circular, and there is only one second boss 269. Figure 7As shown, the frustum portion of the first boss 262 includes a first frustum portion 2621, a second frustum portion 2622, and a third frustum portion 2623. A first through hole penetrates the first frustum portion 2621 and the body 261; a second through hole penetrates the second frustum portion 2622 and the body 261; a third through hole penetrates the third frustum portion 2623 and the body 261; and a second boss 269 corresponds to and is located within the fourth through hole. In other words, in Figure 4 In the embodiment shown, there are four pins 23, three of which correspond one-to-one with the first frustum 2621, the second frustum 2622 and the third frustum 2623 of the first boss 262, and all three of these pins are phase pins; the other pin 23 corresponds to the second boss 269, and this pin 23 is a ground pin.

[0054] Thus, the electronic water pump of the present invention protects the body 261 near the second end face 265 with the first boss 262, while strengthening the stability of the connection between the pin 23 near the second end face 265 and the fixing plate 26. It also protects the body and / or protrusion 268 near the second end face 265 with the second boss 269, while strengthening the stability of the connection between the pin 23 near the second end face 265 and the fixing plate 26.

[0055] In some embodiments, the single-sided gap between the pin 23 and the inner wall surface of the through hole 263 is 0.03 mm to 0.05 mm.

[0056] According to an embodiment of the present invention, the electronic water pump achieves rapid engagement between the pin 23 and the fixing plate 26 by using a clearance fit between the pin 23 and the through hole 263. While ensuring a clearance fit between the pin 23 and the through hole, if the clearance on one side of the inner wall of the pin 23 and the through hole 263 is too small, the engagement becomes more difficult and the pin 23 is prone to deformation during actual use. Conversely, if the clearance on one side of the pin 23 and the inner wall of the through hole 263 is too large, the pin 23 is prone to loosening during actual use. Preferably, the clearance on one side of the pin 23 and the inner wall of the through hole 263 is 0.04 mm.

[0057] The following describes some specific exemplary electronic water pumps according to the present invention with reference to the accompanying drawings.

[0058] like Figure 1-9 As shown, the electric water pump includes a housing 1 and a stator assembly 2 disposed inside the housing 1, the stator assembly 2 being fixedly installed inside the housing 1. Figure 4 As shown, the stator assembly 2 includes a stator core 21, an insulating frame 22, windings 24, a stator injection molded body 25, a fixing plate 26, and multiple pins 23, as shown. Figure 4As shown, the stator core 21 has an insulating frame 22 on its upper and lower sides, and multiple pins 23 are spaced apart and the lower end of the pins 23 is connected to the insulating frame 22 on the upper side of the stator core 21. The winding 24 is wound around the teeth of the stator core 21 and connected to the lower end of the pins 23 through the lead wire. The fixing plate 26 is located on the upper end of the insulating frame 22 on the upper side of the stator core 21, and the multiple pins 23 pass through the fixing plate 26.

[0059] like Figure 5 and Figure 6 As shown, the fixing plate 26 is an arc plate. The body 261 of the fixing plate 26 is provided with a first boss 262. On the first boss 262, a first frustum 2621, a second frustum 2622 and a third frustum 2623 are provided at intervals along the circumference of the arc of the arc plate. The first frustum 2621 and the second frustum 2622 are connected by a first connecting part 2624, and the second frustum 2622 and the third frustum 2623 are connected by a second connecting part 2625. The first frustum 2621, the second frustum 2622 and the third frustum 2623 are respectively provided with a first through hole penetrating the first frustum 2621 and the body 261, a second through hole penetrating the second frustum 2622 and the body 261 and a third through hole penetrating the third frustum 2623 and the body 261.

[0060] like Figure 2 , Figure 7 and Figure 8 As shown, the body 261 includes a first end face 264 and a second end face 265 arranged opposite to each other in its length direction. The body 261 also includes a first side face 266 and a second side face 267 arranged opposite to each other in its width direction. The first side face 266 of the body 261 has a protrusion 268 adjacent to the first end face 264 of the body 261. The fixing plate 26 also includes a second protrusion 269 spaced apart from the first protrusion 262. The outer periphery of the second protrusion 269 is circular, and the second protrusion 269 is a... The second boss 269 is connected to the body 261 and the protrusion 268. The through hole 263 also includes a fourth through hole, which penetrates the first frustum 2621 and the body 261 and partially extends beyond the outer edge of the stator core 21. A groove is formed along the vertical direction at the corresponding position of the outer edge of the stator core 21 and the fourth through hole. The second through hole penetrates the second frustum 2622 and the body 261, the third through hole penetrates the third frustum 2623 and the body 261, and the fourth through hole penetrates the second boss 269, the body, and the protrusion 268. In other words, the second boss 269 is located at the connection between the protrusion 268 and the body 261.

[0061] like Figure 2 and Figure 3As shown, there are four pins 23, namely the U-phase pin, V-phase pin, W-phase pin, and grounding pin. The lower end of the U-phase pin passes through the third through hole and is connected to the insulating frame. The lower end of the V-phase pin passes through the second through hole and is connected to the insulating frame. The lower end of the W-phase pin passes through the first through hole and is connected to the insulating frame. The lead wires of the winding 24 are connected to the lower ends of the U-phase pin, the V-phase pin, and the W-phase pin, respectively. The lower end of the grounding pin passes through the fourth through hole and is connected to the outer edge of the stator core 21 and the slot opened at the corresponding position of the fourth through hole for grounding connection.

[0062] like Figure 1 , Figure 2 and Figure 3 As shown, the stator injection molded body 25 covers the lower ends of multiple pins 23, windings 24, insulating frame 22, stator core 21 and a portion of the fixing plate 26 below.

[0063] The housing 1 has a cavity composed of an inner peripheral wall, an outer peripheral wall, an inner top wall, and an inner bottom wall. The stator injection molded body 25 is fixedly installed in the cavity of the housing 1. The upper part of the fixing plate 26 is located inside the top wall of the housing, and the lower part of the fixing plate 26 is located inside the top of the stator injection molded body 25. The upper end of the pin 23 passes through the stator injection molded body 25, the fixing plate 26, and the top wall of the housing.

[0064] The stator injection molded body 25 is a part that is injection molded in one piece using thermosetting material and covers the stator core 21, insulation frame 22, pins 23, winding 24 and fixing plate 26.

[0065] The housing 1 is made of thermosetting material and is formed by secondary injection molding to cover the stator injection molded body 25. The housing 1 has a cavity, and the stator assembly is installed in the cavity.

[0066] The vehicle according to an embodiment of the present invention includes an electronic water pump according to an embodiment of the present invention, wherein the vehicle can be a new energy vehicle, a fuel vehicle, etc., and new energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc. The vehicle according to an embodiment of the present invention...

[0067] The electronic water pump of the vehicle according to an embodiment of the present invention can effectively protect the pins from deformation, improve production efficiency, and reduce the defect rate.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0072] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electronic water pump, characterized in that, The stator assembly includes a housing and a portion thereof disposed within the housing, the stator assembly comprising: Stator core; An insulating frame, wherein the insulating frame is provided at least at one end of the stator core in the axial direction; A plurality of pins are arranged at intervals, and at least a portion of the pins have one end connected to the insulating frame; The winding is wound around the teeth of the stator core, and the lead wire of the winding is connected to the pin. A stator injection molded body, the stator injection molded body covering one end of the pin, the winding, the insulating frame and the stator core; A fixing plate is disposed on the side of the insulating frame away from the stator core. A portion of the fixing plate is located inside the housing, and another portion of the fixing plate is located inside the stator injection molding body. One end of at least some of the pins passes through the housing, the fixing plate, and the stator injection molding body and is connected to the insulating frame. The fixing plate includes a body and a first boss protruding from the body in a direction away from the stator injection body. The fixing plate has a plurality of through holes, at least a portion of which penetrate the first boss and the body from the side of the first boss away from the body along the axial direction of the stator core. The pin passes through the fixing plate through the through holes. The first boss includes a plurality of frustum portions arranged at intervals and a connecting portion connecting adjacent frustum portions; There are three frustum sections, namely a first frustum section, a second frustum section, and a third frustum section. There are two connecting sections, namely a first connecting section and a second connecting section. The first connecting section connects the first frustum section and the second frustum section, and the second connecting section connects the second frustum section and the third frustum section. There are three through holes, namely a first through hole, a second through hole, and a third through hole. The first through hole passes through the first frustum section and the main body, the second through hole passes through the second frustum section and the main body, and the third frustum section passes through the main body.

2. The electronic water pump according to claim 1, characterized in that, At least a portion of the plurality of through holes penetrates the frustum portion and the body.

3. The electronic water pump according to claim 1, characterized in that, The main body is generally an arc-shaped plate.

4. The electronic water pump according to claim 3, characterized in that, The plurality of said frustum portions are arranged at intervals along the length direction of the body, and the connecting portion extends substantially along the length direction of the body.

5. The electronic water pump according to claim 1, characterized in that, The body includes a first end face and a second end face arranged opposite to each other in its length direction. The body also includes a first side face and a second side face arranged opposite to each other in its width direction. The first side face of the body is provided with a protrusion. The protrusion is adjacent to the first end face of the body. The fixing plate also includes a second boss arranged at a distance from the first boss. The second boss is connected to the body and the protrusion. A portion of the multiple through holes passes through the first boss and the body. Another portion of the multiple through holes passes through the second boss and the body and / or the protrusion.

6. The electronic water pump according to claim 5, characterized in that, The outer periphery of the second boss is circular, and there is only one second boss.

7. The electronic water pump according to claim 1, characterized in that, The single-sided gap between the pin and the inner wall of the through hole is 0.03 mm to 0.05 mm.

8. A vehicle, characterized in that, The vehicle includes an electronic water pump according to any one of claims 1-7.

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