Electric pump

Abstract

An electric pump. The electric pump comprises a stator winding. The stator winding comprises an insulating frame and windings. The windings are wound around the insulating frame and comprise multiple sets of sub-windings. Each set of sub-windings comprises wiring winding portions. Multiple wiring winding portions are arranged adjacently in the circumferential direction of the stator winding. In this way, reducing and simplifying wiring end portions of the windings is facilitated.

Description

electric pump

[0001] This application claims priority to the following three Chinese patent applications, the entire contents of which are incorporated herein by reference:

[0002] 1. Submitted to the China Patent Office on September 3, 2023, application number 202311125080.9, invention name “Electric Pump”;

[0003] 2. Submitted to the China Patent Office on December 28, 2023, application number 2023118444190, invention name “Electric Pump”;

[0004] 3. Submitted to the China Patent Office on September 3, 2023, application number 202322381126.5, and the invention name is "Electric Pump".

Technical field

[0005] The present application relates to the field of fluid driving, and in particular to an electric pump. [Background Technology]

[0006] The electric pump includes a stator winding, which includes an insulating frame and a winding, and the winding is wound around the insulating frame. The stator winding includes multiple wiring winding parts, and the positions of the multiple wiring winding parts along the circumferential direction of the stator winding are relatively dispersed, so that the manufacturing precision of the components matched with the wiring winding parts is higher, for example, the manufacturing precision of the connecting plate assembly is higher, which increases the manufacturing difficulty of the connecting plate assembly.

[0007] [Summary of the invention]

[0008] The purpose of the present application is to provide an electric pump, which is conducive to reducing the manufacturing accuracy of the connecting plate assembly matched with the stator winding, thereby reducing the manufacturing difficulty of the connecting plate assembly.

[0009] To achieve the above-mentioned purpose, an embodiment of the present application adopts the following technical solution: an electric pump, the electric pump includes a stator winding, the stator winding includes an insulating frame and a winding, the winding is wound on the insulating frame, the winding includes multiple groups of sub-windings, each group of sub-windings includes a wiring winding part, and the multiple wiring winding parts are adjacently arranged along the circumferential direction of the stator winding. The windings of the multiple groups of sub-windings are a continuous winding, and the winding includes a first free end and a second free end. The first free end and the second free end are electrically connected through a conductive member.

[0010] In one embodiment of the present application, the winding includes multiple sub-windings, each of which includes a connecting winding portion. The multiple connecting winding portions are adjacently arranged along the circumference of the stator winding. This helps reduce the manufacturing precision of the connecting plate assembly that cooperates with the stator winding, thereby reducing the manufacturing difficulty of the connecting plate assembly.

Brief Description of the Drawings

[0011] FIG1 is a schematic perspective view of a first embodiment of an electric pump according to the present invention;

[0012] FIG2 is a schematic diagram of an exploded structure of the electric pump in FIG1 ;

[0013] FIG3 is a schematic diagram of the cross-sectional structure of the electric pump along XX in FIG1 ;

[0014] FIG4 is a schematic cross-sectional view of the stator assembly of the electric pump in FIG1 in one direction;

[0015] FIG5 is a schematic perspective structural diagram of a first embodiment of the stator winding of the electric pump in FIG1 ;

[0016] FIG6 is a schematic structural diagram of the stator winding in FIG5 after it is expanded in the circumferential direction;

[0017] FIG7 is a schematic diagram of the stator winding arrangement structure in FIG5 ;

[0018] FIG8 is a schematic diagram of the three-dimensional structure of an embodiment of the stator core of the electric pump in FIG1 ;

[0019] FIG9 is a schematic top view of the stator core in FIG8 ;

[0020] FIG10 is an enlarged structural diagram of the stator core at point A in FIG9 ;

[0021] FIG11 is a schematic structural diagram of the relative positions of one sub-core portion and other sub-core portions of the stator core in FIG8 ;

[0022] FIG12 is a schematic perspective structural diagram of a second embodiment of the stator winding of the electric pump in FIG1 ;

[0023] FIG13 is a schematic structural diagram of the stator winding in FIG12 after it is expanded in the circumferential direction;

[0024] FIG14 is a schematic diagram of the stator winding arrangement structure in FIG12;

[0025] FIG15 is a schematic diagram of the three-dimensional structure of the stator winding of the electric pump in FIG1 without the winding;

[0026] FIG16 is a schematic diagram of the enlarged structure of point B in FIG15;

[0027] FIG17 is a schematic perspective view of an embodiment of the connection plate assembly in FIG1 being mounted on a stator winding;

[0028] FIG18 is a schematic diagram of the exploded structure of the connecting plate assembly and the stator winding in FIG17;

[0029] FIG19 is a schematic diagram of the three-dimensional structure of the first component in FIG4;

[0030] FIG20 is a schematic diagram of the three-dimensional structure of the second housing in FIG4 ;

[0031] FIG21 is a schematic diagram of an electric pump according to an embodiment of the present application;

[0032] FIG22 is a schematic diagram of the connection between the stator winding and the connecting plate assembly from a first perspective;

[0033] FIG23 is a schematic diagram of the connection between the stator winding and the connecting plate assembly from a second perspective;

[0034] FIG24 is a schematic diagram of the stator winding in FIG22 from a first perspective;

[0035] FIG25 is a schematic diagram of the stator winding in FIG22 from a second perspective;

[0036] FIG26 is a schematic diagram of the first stator unit, the second stator unit, or the third stator unit;

[0037] FIG27 is a schematic diagram of the connecting plate assembly from a first perspective;

[0038] FIG28 is a schematic diagram of the connecting plate assembly from a second perspective;

[0039] FIG29 is a schematic diagram of a conductive member from a first perspective;

[0040] FIG30 is a schematic diagram of the conductive member from a second viewing angle.

[0041] In the attached figure:

[0042] 100. Electric pump;

[0043] 11. Pump cover;

[0044] 12. Rotating assembly; 122. Impeller assembly; 121. Rotor assembly;

[0045] 13. Stator assembly; 131. Housing; 1311. First housing; 1311a. First main body; 1311b. Inner groove; 1311c. First inner groove; 1311d. Second inner groove; 1312. Second housing; 1312a. Raised portion; 1312b. Rotor cavity bottom; 1312c. Rotor cavity side; 1312d. Radial extension; 1312e. First raised portion; 1312f. Second raised portion.

[0046] 132. Stator winding; 1321. Stator core; 1321a. Sub-core; 1321b. First side wall; 1321c. Second side wall; 1321d. Recess; 1321e. Outer wall; 1321f. First recessed wall; 1321g. Second recessed wall; 1321h. First line segment; 1321e. Second line segment; 1321k. First intersection; 1321m. Circumferential trajectory; 1321n. Grounding slot; 1321p. First slot wall; 1321q. Second slot wall; 1321s. First distance L; 1321t. First sub-core; 1321u. Second sub-core.

[0047] 1322, insulating frame; 1322b / 13222, mounting portion; 1322c, anti-slip groove; 1322d, stop portion; 1322e, winding portion; 1322f, stop portion; 1322g / 1331c, first mounting portion; 1322h / 1332c, second mounting portion; 1322j / 1333c, third mounting portion; 1322k, bottom portion; 1322m, upper end portion; 1322n, inner portion; 1322p, outer portion; 1322q, main body; 1322s, isolation seat; 1322t, wire stop portion;

[0048] 1323, winding; 1323a, first sub-winding group; 1323b, second sub-winding group; 1323c, third sub-winding group; 1323d, first bridge wire; 1323e, first connecting wire; 1323f, second bridge wire; 1323g, second connecting wire; 1323p, third bridge wire; 1323q, third connecting wire; 1323s, first free end; 1323s1, first electrical connection segment; 132 3t, second free end portion; 1323t1, second electrical connection section; 1323h, first connection portion; 1323i, second connection portion; 1323j, third connection portion; 1323k, fourth connection portion; 1323m, fifth connection portion; 1323n, sixth connection portion; 1324, connection winding portion; 1324a, first connection winding portion; 1324b, second connection winding portion; 1324c, third connection winding portion;

[0049] 14. Connecting plate assembly; 141. Conductive member; 1411. Grounding end; 1412. First connecting end; 1413. Second connecting end; 142. Limiting member;

[0050] 15. Shaft; 16. First assembly; 17. Rotor cavity; 18. Impeller cavity; 101. First surface; 102. Reference surface; 103. Injection connection surface; 1031. End connection surface; 1032. Cylindrical connection surface; 104. Contact surface;

[0051] 13221, fixing portion; 13223, positioning portion; 133, stator unit; 133a, stator core monomer; 133b, insulating frame monomer; 1331, first stator unit; 1331a, first stator core monomer; 1331b, first insulating frame monomer; 1333, third stator unit; 1333a, third stator core monomer; 1333b, third insulating frame monomer; 1334, fourth stator unit; 1334a, fourth stator core monomer; 1335, fifth stator unit; 1421, main body; 1421a, upper surface; 1421b, lower surface; 1422, connector; 1422a, accommodating cavity; 1423, limiting hole; 1424a, first wire pressing portion; 1424b, second wire pressing portion; 1425a, first A reinforcing portion; 1425b, a second reinforcing portion; 1426, a supporting portion; 143, a conductive portion; 143a, a conductive body; 143b, an auxiliary portion; 143c, a pin body; 143d, an end portion; 143e, a pin; 1431, a first conductive body; 1431a, a first body portion; 1431b, a first pin; 1431c, a first pin; 1432, a second conductive body; 1432a, a second body portion; 1432b, a second pin; 1432c, a second pin; 1433, a third conductive body; 1433a, a third body portion; 1433b, a third pin; 1433c, a third pin; 1434, a fourth conductive body; 1434a, a fourth body portion; 1434b, a fourth pin; 1434c, a ground pin;. [Specific implementation method]

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0053] The following further details the specific embodiments of the present application in conjunction with the accompanying drawings. First, it should be noted that directional terms such as "up," "down," "left," "right," "front," "rear," "inside," "outside," "top," and "bottom" mentioned or potentially mentioned in this specification are defined relative to the structures shown in the corresponding drawings. These are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0054] The electric pump in the following embodiments can provide flow power for the working medium of the automotive thermal management system. The working medium may be a 50% ethylene glycol aqueous solution or clean water. Of course, the working medium may also be other substances.

[0055] 1 to 20 , the present application provides an electric pump 100 including a pump cover 11, a rotating assembly 12, and a stator assembly 13. The stator assembly 13 includes a connecting plate assembly 14, a stator winding 132, a shaft 15, and a housing 131. The pump cover 11 and the stator assembly 13 are sealed and fixed. It should be noted that the sealing and fixing here means preventing the working medium from leaking to the outside of the electric pump 100 when the electric pump 100 is working. The shaft 15 is fixed to the housing 131 by injection molding. It can be understood that part of the shaft 15 is embedded in the housing 131. The electric pump 100 has a pump cavity, and the rotating assembly 12 is located in the pump cavity. The pump cavity includes a rotor cavity 17 and an impeller cavity 18, and the rotor cavity 17 and the impeller cavity 18 are connected. The rotating assembly 12 includes a rotor assembly 121 and an impeller assembly 122. The rotor assembly 121 includes a permanent magnet. At least part of the rotor assembly 121 is located in the rotor cavity 17, and the impeller assembly 122 is located in the impeller cavity 18, so that the working medium can flow through the inner cavity of the pump. In a specific embodiment, the other end of the shaft 15 is at least partly located in the rotor cavity 17, and at least part of the rotating assembly 12 is sleeved on the outer periphery of the shaft 15, and the rotating assembly 12 is transmission-connected to the shaft 15. Of course, as other embodiments, the rotating assembly 12 and the shaft 15 are fixedly connected, and the shaft 15 rotates with the rotor assembly 121. The connecting plate assembly 14 includes a limit member 142 and a conductive member 141, the limit member 142 is limit-connected or fixedly connected to the stator winding 132, and the conductive member 141 is limit-connected or fixedly connected to the limit member 142. Specifically, the conductive member 141 is partially embedded in the limit member 142, and the limit member 142 is an injection molded part. The conductive member 141 includes a first connection end and a second connection end, the first connection end is electrically connected to the stator winding 132, and the second connection end can serve as a pin end when electrically connected to the external power supply of the electric pump 100. Of course, as another implementation method, the electric pump 100 may also not include the pump cover 11, and the pump cover 11 is integrated into the external structure. Such a setting is more conducive to the integrated design of the electric pump 100, making the structure of the electric pump 100 more compact, and more conducive to the miniaturization and lightweight of the structure of the electric pump 100. When the electric pump 100 is working, the current of the stator winding 132 is controlled to control the excitation magnetic field generated by the stator winding 132, and the rotating component 12 rotates around the axis 15 under the action of the excitation magnetic field.

[0056] As shown in FIG5 , the stator winding 132 includes a stator core 1321, an insulating frame 1322, and windings 1323. The number of windings 1323 is at least three. The insulating frame 1322 covers at least a portion of the surface of the stator core 1321. The insulating frame 1322 is used to isolate the windings 1323 from the stator core 1321, so that the windings 1323 and the stator core 1321 are electrically insulated. The insulating frame 1322 and the stator core 1321 can be an integral structural component. Specifically, as an implementation method, the insulating frame 1322 is formed by injection molding with the stator core 1321 as an insert. Of course, as other embodiments, the insulating frame 1322 and the stator core 1321 are separately provided. Here, "separately provided" means that the insulating frame 1322 and the stator core 1321 are each processed into two separate parts and then assembled. The connection is limited or fixed by assembly. In this embodiment, the insulating frame 1322 is formed by injection molding with the stator core 1321 as an insert. It will be understood that the stator core 1321 and the insulating frame 1322 are an integrated structure. The windings 1323 are wound around the insulating frame 1322. As a specific embodiment, the windings 1323 include nine windings. Of course, in other embodiments, the windings 1323 may include other numbers of windings, such as three, six, nine, or twelve. In this embodiment, the windings 1323 are nine.

[0057] In order to achieve the miniaturization of the electric pump 100, please refer to Figures 5 to 11. As an implementation method, the stator core 1321 is a split structure. Specifically, the stator core 1321 includes a plurality of sub-core parts 1321a, and the insulating skeleton 1322 includes a plurality of sub-skeleton parts. The sub-skeleton parts are coated on at least the surface of the sub-core parts 1321a. When winding, the plurality of sub-core parts 1321a form a chain structure before winding. After the winding is completed, the plurality of sub-core parts 1321a are welded to form a full circle structure. When winding this structure, a chain structure can be used for winding. It should be noted that winding with a chain structure means arranging the sub-core parts of the split stator core 1321 in a horizontal row for winding, and then forming a circle after the winding is completed, and then welding each sub-core part 1321a to fix it. This structural arrangement involves first winding the wire and then forming a circle to form the stator winding 132. Given a fixed stator slot space, this winding method can increase the number of turns of the coil on each sub-frame portion, thereby improving the slot fill rate of the stator winding 132. While maintaining the same power of the electric pump 100, the axial dimension of the stator core 1321 can be reduced, thereby laying a foundation for miniaturization of the electric pump 100. It should be noted that the stator slot is the space formed by the splicing of adjacent sub-frame portions 1322a.

[0058] As an implementation method, please refer to Figures 5 to 11. The stator core 1321 includes at least two sub-core parts 1321a. The at least two sub-core parts 1321a are distributed along the circumference of the stator core 1321. Each sub-core part 1321a includes a first side wall 1321b and a second side wall 1321c. Along the circumference of the stator core 1321, the first side wall 1321b and the second side wall 1321c are located on opposite sides of the sub-core part 1321a. One of the sub-core parts 1321a is defined as a first sub-core part 1321t, which is connected to the first sub-core part 1321t. The adjacent sub-core portion 321t is the second sub-core portion 1321u, and at least part of the first side wall 1321b of the first sub-core portion 1321t and at least part of the second side wall 1321c of the second sub-core portion 1321u are welded and fixed; the stator core 1321 includes a recess 1321d, and the recess 1321d includes a first recessed wall 1321f and a second recessed wall 1321g, and the first recessed wall 1321f is arranged opposite to the second recessed wall 1321g, and the first recessed wall 1321f is a part of the first side wall 1321b of the first sub-core portion 1321t, and the second recessed wall 1321 321g is a portion of the second side wall 1321c of the second sub-core portion 1321u, defining the first surface 101, the first surface 101 is perpendicular to the axis of the stator core 1321, the projection of the first concave wall 1321f on the first surface 101 is defined as a first line segment 1321h, the projection of the second concave wall 1321g on the first surface 101 is defined as a second line segment 1321e, the first line segment 1321h is equal to the second line segment 1321e, the first line segment 1321h intersects with the second line segment 1321e or the extension of the first line segment 1321h and the second line segment 1321e is defined as The extension lines intersect, defining the intersection of first line segment 1321h and second line segment 1321e as first intersection point 1321k. The projection of the outer wall of stator core 1321 on first surface 101 is defined as circumferential trajectory line 1321m. Along the radial direction of electric pump 100, the radial distance from first intersection point 1321k to the circumferential extension line 1321m of circumferential trajectory line 1321m is a first distance L, which is less than or equal to 0.5 mm. First line segment 1321h or second line segment 1321e can be a straight segment or a curved segment. This arrangement effectively stores excess material during welding of stator core 1321, preventing it from protruding beyond the outer wall of stator core 1321. Furthermore, the radial depth of recess 1321d is limited to a suitable range, ensuring motor performance.

[0059] As an implementation method, please refer to Figures 5 to 11, 17, and 18. The stator core 1321 also includes a grounding slot 1321n, and the sub-core portion 1321a includes an outer wall portion 1321e. The outer wall portion 1321e is respectively connected to the first side wall 1321b and the second side wall 1321c. Along the radial direction of the stator core 1321, the stator slot is recessed in the outer wall portion 1321e. The grounding slot 1321n includes a first slot wall 1321p and a second slot wall 1321q. The first slot wall 1321p and the second slot wall 1321q are arranged parallel to each other. Along the circumferential direction of the stator core 1321, the distance between the first slot wall 1321p and the second slot wall 1321q is a first distance 1321s. The conductive member 141 includes a grounding end portion 1411. At least a portion of the grounding end portion 1411 is located in the grounding slot 1321n. The grounding end portion 1411 has an interference fit with the grounding slot 1321n. Specifically, the width dimension of the grounding end portion 1411 is greater than the first distance 1321s. When the stator winding 132 is wound, the grounding slot 1321n also serves as a positioning slot for the sub-core portion 1321a and the external winding tooling. This approach reduces the manufacturing difficulty of the electric pump 100 while ensuring reliable grounding of the stator core 1321 and improving the EMC performance of the motor in the electric pump 100.

[0060] In order to reduce the number of winding ends and facilitate the arrangement of the ends of the stator winding 132 after the stator winding 132 is wound, as an implementation method, please refer to Figures 1 to 20. The stator winding 132 includes an insulating frame 1322 and a winding 1323. The winding 1323 is wound on the insulating frame 1322. The winding 1323 is wound in the same direction on the insulating frame 1322. The winding 1323 includes multiple groups of sub-windings. Each sub-group of windings 1323 is electrically connected to each other through a wire or a conductive member 141. Each group of sub-windings includes a wiring winding portion 1324. Multiple wiring winding portions 1324 are arranged adjacent to each other. The wiring winding portion 1324 is used to electrically connect to an external power source. It should be noted that the above-mentioned wiring ends refer to the free ends formed after the winding 1323 is wound. In the above scheme, if the stator winding 132 is wound using a single wire, two terminal ends are formed after the stator winding 132 is completed. If the stator winding 132 is wound using N wires, 2N terminal ends are formed after the stator winding 132 is completed. This approach firstly reduces the number of terminal ends of the stator winding 132, thereby facilitating the arrangement of the wires at the terminal ends after the stator winding 132 is completed. Secondly, the reduced number of terminal ends reduces the number of locations for external electrical connections, which improves the reliability of the electrical connection of the electric pump 100 and increases the lifespan of the electric pump 100. Third, the adjacently arranged connection winding portions 1324 facilitate simplification of the structures of other components, such as the structure of the connection plate assembly 14 that is electrically connected to the stator winding 132. In one embodiment, the conductive member 141 is fixed to the stopper 142 by injection molding, that is, the conductive member 141 is mounted on the stator winding 132 to achieve electrical connection. To improve the assembly accuracy of the connection plate assembly 14 and the stator winding 132, the adjacent arrangement of the connection winding portions further facilitates improving the positional accuracy of the conductive member 141 that is electrically connected to the stator winding 132, reduces the manufacturing difficulty of the connection plate assembly 14, and lays a certain foundation for reducing the production cost of the electric pump 100. It should be noted that "adjacent" here and below refers to the adjacent arrangement of multiple connection winding portions 1324 along the circumference of the stator winding in a clockwise or counterclockwise direction. It can be understood that the multiple connection winding portions 1324 are respectively arranged corresponding to multiple adjacent sub-core portions, that is, the sub-core portions corresponding to adjacent connection winding portions 1324 are adjacent. It should be noted that the "corresponding" setting here specifically means that the connection winding part corresponds one-to-one with the tooth part of its corresponding sub-core part, the connection winding part is arranged on the radial outside of the tooth part of its corresponding sub-core part, and the winding part described below covers the tooth part of the sub-core part.

[0061] As a specific implementation method, please refer to Figures 1 to 20. Multiple groups of sub-windings 1323 are electrically connected through at least one winding. It can be understood that multiple groups of sub-windings 1323 are a continuous winding. Multiple groups of sub-windings 1323 include a first free end 1323s and a second free end 1323t. The first free end 1323s is located at the sub-winding that is wound first, and the second free end 1323t is located at the sub-winding that is wound last. Specifically, the stator winding 132 includes a first group of sub-windings 1323a, a second group of sub-windings 1323b, and a third group of sub-windings 1323c. The first group of sub-windings 1323a is defined as the sub-winding wound initially. The first group of sub-windings 1323a includes a first free end portion 1323s, and the third group of sub-windings 1323c includes a second free end portion 1323t. The electric pump 100 includes a conductive member 141. The first free end portion 1323s and the second free end portion 1323t are electrically connected via the conductive member 141. The plurality of connection winding portions 1324 include a first connection winding portion 1324a, a second connection winding portion 1324b, and a third connection winding portion 1324c. The assembly portion 1324a is located where the first free end portion 1323s and the second free end portion 1323t connect to the conductive member 141. The first free end portion 1323s includes a first electrical connection segment 1323s1, and the second free end portion 1323t includes a second electrical connection segment 1323t1. The first electrical connection segment 1323s1 and the second electrical connection segment 1323t1 are electrically connected via the conductive member 141. The first electrical connection segment 1323s1 and the second electrical connection segment 1323t1 form the first connecting winding portion 1324a. The second connecting winding portion 1324b and the third connecting winding portion 1324c are sequentially adjacent to the first connecting winding portion 1324a along the circumferential direction of the stator winding. This method helps reduce the manufacturing difficulty of components that cooperate with the stator winding 132, such as the connecting plate assembly 14.

[0062] In order to simplify the winding method of the stator winding 132, please refer to Figures 1 to 20. While miniaturizing the electric pump 100, it is convenient to electrically connect the stator winding 132 to the connecting plate assembly 14. As a specific embodiment, the stator winding 132 is unfolded in the circumferential direction. Looking toward the outer wall of the stator winding 132, please refer to Figure 6. The windings are numbered from left to right. The first group of sub-windings 1323a, the second group of sub-windings 1323b, and the third group of sub-windings 1323c each include three coils. The three coils of the first group of sub-windings 1323a are defined as the first coil, the fourth coil, and the seventh coil; the three coils of the second group of sub-windings are defined as the second coil, the fifth coil, and the eighth coil. The three coils of the third group of sub-windings are the third coil, the sixth coil, and the ninth coil; the first coil includes a first free end 1323s, the first group of sub-windings 1323a includes a first bridge wire 1323d and a first connecting wire 1323e, the second group of sub-windings 1323b includes a second bridge wire 1323f and a second connecting wire 1323g, the third group of sub-windings 1323c includes a third bridge wire 1323p and a third connecting wire 1323q, the first coil and the fourth coil, and the fourth coil and the seventh coil The bridge wire between the first and second sub-windings 1323a and 1323b is electrically connected via a first connecting wire 1323e. The bridge wire between the second coil and the fifth coil and between the fifth coil and the eighth coil is a second bridge wire 1323g. The second and third sub-windings are electrically connected via a second connecting wire 1323g. The bridge wire between the third and sixth coils and between the sixth and ninth coils is a third bridge wire 1323p. The second free end of the ninth coil is electrically connected to the first and sixth coils. The first free end of a coil is electrically connected via a conductive member 141. The connecting wire between the ninth coil and the first coil is a third connecting wire 1323q. The first bridge wire 1323d is on a different side from the first connecting wire 1323e, the second bridge wire 1323f is on a different side from the second connecting wire 1323g, and the third bridge wire 1323p is on a different side from the third connecting wire 1323q. The second connecting winding 1324b is located on the first connecting wire 1323e, and the second connecting winding 1324b is located on the second connecting wire 1323g. This method helps disperse the number of conductor layers at the end of the stator winding 132, thereby simplifying the end structure of the stator winding 132 and laying a foundation for simplifying the structure of the electric pump 100.

[0063] Specifically, please refer to Figures 1 to 20, the stator winding 132 also includes a mounting portion 1322b. Specifically, the stator winding 132 also includes a mounting portion 1322b, and the mounting portion 1322b is arranged on the insulating frame 1322. The number of the mounting portions 1322b is the same as the number of winding groups, and the number of the mounting portions 1322b is three. The mounting portion corresponding to the first coil is defined as the first mounting portion 1322g, the mounting portion corresponding to the second coil is defined as the second mounting portion 1322h, and the mounting portion 1322b corresponding to the third coil is defined as the third mounting portion 1322j. The first winding connection portion is located at the first mounting portion 1322g, the second winding connection portion is located at the second mounting portion 1322h, and the third winding connection portion is located at the third mounting portion 1322j.

[0064] To further improve the production efficiency of stator winding 132, as shown in Figures 1 to 4, 13, and 14, the first, second, and third sub-windings 1323a, 1323b, and 1323c can be wound simultaneously, with each sub-winding having two terminal ends. The final six terminal ends are electrically connected at the fixed portion via conductive members 141. This method helps improve the processing cycle of stator winding 132 and facilitates the automated production line of stator winding 132. As shown in the schematic diagrams of Figures 13 and 14, the stator winding 132 is unfolded in the circumferential direction, and the windings are numbered in sequence from left to right when looking toward the outer wall of the stator winding 132. The multiple groups of sub-windings include a first group of sub-windings 1323a, a second group of sub-windings 1323b, and a third group of sub-windings 1323c. The first group of sub-windings 1323a includes a first coil, a fourth coil, and a seventh coil. The second group of sub-windings 1323b includes a second coil, a fifth coil, and an eighth coil. The third group of sub-windings 1323c includes a third coil, a fourth coil, and a seventh coil. The sixth coil and the ninth coil, the first group of sub-windings 1323a includes a first connection portion 1323h and a second connection portion 1323i, the second group of sub-windings 1323b includes a third connection portion 1323j and a fourth connection portion 1323k, the third group of sub-windings 1323c includes a fifth connection portion 1323m and a sixth connection portion 1323n, the plurality of connection winding portions include a first connection winding portion 1323a, a second connection winding portion 1324b and a third connection winding portion 1324c, the first connection portion 1323h and the sixth connection portion 1323n The first connection portion 1323h and the sixth connection portion 1323n are electrically connected to form the first connection winding portion 1324a; the second connection portion 1323i and the third connection portion 1323j are electrically connected, and the second connection portion 1323i and the third connection portion 1323j are electrically connected to form the second connection winding portion 1324b; the fifth connection portion 1323m and the fourth connection portion 1323k are electrically connected, and the fifth connection portion 1323m and the fourth connection portion 1323k are electrically connected to form the third connection winding portion 1324c; or the first connection portion 1323 h is electrically connected to the fourth connecting portion 1323k, the first connecting portion 1323h is electrically connected to the fourth connecting portion 1323k to form the first winding connecting portion 1324a, the third connecting portion 1323j is electrically connected to the sixth connecting portion 1323n, the third connecting portion 1323j is electrically connected to the sixth connecting portion 1323n to form the second winding portion 1324b, the second connecting portion 1323i is electrically connected to the fifth connecting portion 1323m, and the second connecting portion 1323i is electrically connected to the fifth connecting portion 1323m to form the third winding portion 1324c. This method facilitates automated production of the stator winding 132. For example, the first group of sub-windings 1323a, the second group of sub-windings 1323b, and the third group of sub-windings 1323c can be wound simultaneously, which helps reduce the production cycle of the stator winding 132.

[0065] In order to reduce the loosening of the winding at the free end of the stator winding 132, please refer to Figures 1 to 16. As an implementation method, the insulating frame 1322 includes an anti-slip groove 1322c, the insulating frame 1322 includes a stopper 1322d, a winding portion 1322e and a stopper 1322f, the stopper 1322d is arranged on one side of the winding portion 1322e, and the stopper 1322f is arranged on the other side of the winding portion 1322e. Along the radial direction of the electric pump 100, the stopper 1322d is opposite to the stopper 1322f. 22f is away from the center of the electric pump 100, and the anti-slip groove 1322c is set in the stopper 1322d. The anti-slip groove 1322c is recessed in the upper end 1322m of the stopper 1322d. Along the radial direction of the electric pump 100, the anti-slip groove 1322c penetrates the thickness direction of the stopper 1322d, and part of the wiring end is located in the anti-slip groove 1322c. Along the circumferential direction of the electric pump 100, the width of the anti-slip groove 1322c is less than the wire diameter of the winding. This is conducive to holding the winding and preventing the winding from loosening. The circumferential position of the anti-slip groove 1322c corresponds to the position of the free end. Of course, in order to facilitate the mold opening of the insulating skeleton 1322, it is also possible to set the anti-slip groove 1322c on each sub-skeleton.

[0066] Please refer to Figures 1 to 16. To facilitate the arrangement of the bridge wires, the blocking portion 1322d includes a main body 1322q and an isolation seat 1322s. The isolation seat 1322s is fixedly connected to the stator core 1321, and the main body 1322q extends away from the stator core 1321. In order to make the first bridge wire 1323d as close to the isolation seat 1322s as possible, the bottom 1322k of the anti-slip groove 1322c is a sloped structure, and the end face of the stator core 1321 fixedly connected to the isolation seat 1322s is defined as the reference plane 102, and the angle between the plane where the bottom is located and the reference plane 102 is an acute angle. In this manner, a gradient transition occurs when the first bridge wire 1323d connects from the inner side of the stopper 1322d to the outer side of the stopper 1322d. This facilitates the first bridge wire's approach to the isolation seat 1322s and facilitates the arrangement of the first, second, and third bridge wires 1323d, 1323f, and 1323p in the axial direction of the electric pump. This reduces the space occupied by the bridge wires and lays a foundation for the miniaturization of the electric pump 100.

[0067] Referring to Figures 1 to 16 , after each winding group is completed and the second sub-winding group is wound, the first connecting wire is typically disposed on the outer side of the stopper 1322d. To prevent the winding wire from directly jumping to the inner side of the stopper 1322d during winding of the second sub-winding group, the insulating frame 1322 further includes a wire retaining portion 1322t. The wire retaining portion 1322t protrudes from the upper end portion 1322m of the stopper 1322d along the circumferential direction of the electric pump 100 and is located on one side of the anti-slip groove 1322c. This prevents the connecting wire on the outer side of the stopper 1322d from directly jumping to the inner side of the stopper 1322d.

[0068] 1 to 20 , the housing 131 includes a first housing 1311 and a second housing 1312. The first housing 1311 is formed by insert-molding at least with the stator winding 132. Specifically, as an implementation, at least a portion of the first housing 1311 is formed by insert-molding the stator winding 132. Specifically, the first housing 1311 is formed by insert-molding the stator winding 132. Of course, in other implementations, the first housing 1311 is formed by insert-molding the connecting plate assembly 14 and the stator winding 132. The specific method of insert-molding the first housing 1311 with the connecting plate assembly 14 and the stator winding 132 is described below and will not be described in detail here. Define the first component 16, the first component 16 includes a first shell 1311 and a stator winding 132, at least part of the second shell 1312 is formed by insert injection molding with the first component 16 and the shaft 15, specifically, the second shell 1312 is formed by insert injection molding with the first component 16 and the shaft 15, and the first shell 1311 and the second shell 1312 are injection-molded and fixed.

[0069] As shown in Figures 1 to 20, as one implementation, the connecting plate assembly 14 and the stator winding 132 are positionally positioned or fixedly connected along the axial direction of the electric pump 100. The connecting plate assembly 14 is electrically connected to the windings of the stator winding 132. At least a portion of the first housing 1311 is formed by injection molding with the stator winding 1312 and the connecting plate assembly 14 as inserts. At least a portion of the connecting plate assembly 14 and a portion of the stator winding 132 are located within the first housing 1311. This approach facilitates, firstly, radial miniaturization of the electric pump 100. Secondly, injection molding the connecting plate assembly 14 and the stator winding 132 as inserts simplifies the assembly process of the electric pump 100.

[0070] As an implementation method, please refer to Figures 1 to 20, the first shell 131 includes a first main body 1311a, the first main body 1311a has an inner groove 1311b, the first component 16 includes an injection-molded connecting surface 103, the surface injection-molded to the second shell 1312 is the injection-molded connecting surface 103, the inner groove 1311b is recessed in the injection-molded connecting surface 103, the second shell 1312 includes a raised portion 1312a, the surface injection-molded to the first shell 1311 is the contact surface 104, the raised portion 1312a protrudes from the contact surface 104, and the raised portion 1312a is located in the groove portion 1311b. Specifically, along the axial direction of the electric pump 100, the injection-molded connecting surface 103 is close to the second shell 1312 relative to the connecting plate assembly 14, and the inner groove 1311b is recessed in the injection-molded connecting surface 103. Specifically, the injection-molded connecting surface 103 includes an end connecting surface 1031 and a cylindrical connecting surface 1032. The inner groove 1311b includes a first inner groove 1311c and a second inner groove 1311d. Along the axial direction of the electric pump 100, the first inner groove 1311c is recessed in the end connecting surface 1031, and along the radial direction of the electric pump 100, the second inner groove 1311d is recessed in the cylindrical connecting surface 1032.

[0071] Please refer to Figures 1 to 20. As an implementation method, the second shell 1312 is formed by insert injection molding with at least the first component 16. The second shell 1312 includes a rotor chamber bottom 1312b and a rotor chamber side 1312c. The second shell 1312 also includes a radial extension section 1312d. The radial extension section 1312d is sealed and connected to one end of the rotor chamber side 1312c. Along the axial direction of the electric pump 100, the radial extension section 1312d is close to the impeller chamber 18 relative to the rotor chamber bottom 1312b. The radial extension section 1312d is injection-molded and fixed to the end of the first component 16. The electric pump 100 includes an impeller chamber 18 and a rotor chamber 17. The rotor chamber 17 is connected to the impeller chamber 18. The wall corresponding to the rotor chamber 17 includes the rotor chamber bottom 1312b and the rotor chamber side 1312c. The wall corresponding to the impeller chamber 18 includes at least part of the radial extension section 1312d. The second housing 1312 includes a raised portion 1312a, which is located within the inner groove 1311b. The raised portion 1312a includes a first raised portion 1312e and a second raised portion 1312f. The first raised portion 1312e extends along the outer wall of the rotor cavity side portion 1312c, away from the axis of the electric pump. The second raised portion 1312f extends along the lower end of the radial extension section 1312d, away from the lower end. The end surface of the radial extension section 1312d contacts the injection molding connection surface 103. This arrangement helps increase the contact area between the first housing 131 and the second housing 131, while also improving the structural strength of the second housing 131.

[0072] Referring to Figures 21 to 30 , the present application provides an electric pump comprising a pump cover 11, a rotating assembly 12, and a stator assembly 13. The stator assembly 13 comprises a connecting plate assembly 14, a stator winding 132, a shaft 15, and a housing 131. The pump cover 11 and the stator assembly 13 are sealed and fixed. It should be noted that the sealing and fixing herein refers to preventing the working medium from leaking outside the electric pump when the electric pump is in operation. The shaft 15 is injection-molded and fixed to the housing 131. It is understood that a portion of the shaft 15 is embedded in the housing 131. The electric pump has a pump cavity, and the rotating assembly 12 is located in the pump cavity. The pump cavity includes a rotor cavity 16 and an impeller cavity 17, and the rotor cavity 16 and the impeller cavity 17 are connected. The rotating assembly 12 includes a rotor assembly 121 and an impeller assembly 122. The rotor assembly 121 includes a permanent magnet and is located radially inward of the stator winding 132. At least part of the rotor assembly 121 is located in the rotor cavity 16, and the impeller assembly 122 is located in the impeller cavity 17, so that the working medium can flow through the inner cavity of the pump. In a specific embodiment, the other end of the shaft 15 is at least partially located in the rotor cavity 16, and at least part of the rotating assembly 12 is sleeved on the outer periphery of the shaft 15, and the rotating assembly 12 is transmission-connected to the shaft 15. Of course, as other embodiments, the rotating assembly 12 and the shaft 15 are fixedly connected, and the shaft 15 rotates with the rotor assembly 121. The connecting plate assembly 14 includes a limiter 142 and a conductive member 141, the limiter 142 is limit-connected or fixedly connected to the stator winding 132, and the conductive member 141 is limit-connected or fixedly connected to the limiter 142. Of course, as another implementation method, the electric pump can also not include the pump cover 11, and the pump cover 11 is integrated into the external structure. Such a setting is more conducive to the integrated design of the electric pump, making the structure of the electric pump more compact, and more conducive to the miniaturization and lightweighting of the electric pump structure. When the electric pump is working, the current of the stator winding 132 is controlled, thereby controlling the excitation magnetic field generated by the stator winding 132 . The rotating assembly 12 rotates around the shaft 15 under the action of the excitation magnetic field.

[0073] Referring to Figures 22 to 30 , the electric pump further includes a connecting plate assembly 14, which is electrically connected to the stator winding 132. The connecting plate assembly 14 includes a plurality of conductive portions 143 and a main body 1421. The conductive portions 143 are fixedly connected to the main body 1421 and include pins 143e. The stator winding 132 includes at least two adjacent stator units 133, with at least two pins 143e located in adjacent stator units 133. The pins 143e extend perpendicularly to the main body 1421. A plane perpendicular to the central axis of the electric pump is defined as a first plane. The projection of the stator winding 132 on the first plane is defined as a first projection, and the projection of the main body 1421 on the first plane is defined as a second projection. The area of ​​the first projection is greater than the area of ​​the second projection. The relatively small projected area of ​​the main body 1421 reduces the material used to manufacture the main body 1421, thereby reducing the material used to manufacture the connecting plate assembly 14, thereby reducing the weight and production cost of the electric pump.

[0074] The connecting plate assembly 14 includes a retaining member 142 and a conductive member 141. The retaining member 142 is injection molded with at least the conductive member 141 as an insert. The manufacturing process for the connecting plate assembly 14 is relatively simple, which helps to improve the production efficiency of the connecting plate assembly 14. The conductive member 141 is connected to the stator winding 132. The retaining member 142 is an injection molded part. The portion of the retaining member 142 that contacts the conductive member 141 is non-conductive. This helps prevent current flowing through the conductive member 141 from leaking out of the retaining member 142 during operation of the electric pump. The conductive member 141 includes several conductive portions 143, which are connected to the stator winding 132.

[0075] Referring to Figures 22 to 28 , the retaining member 142 includes a main body 1421 and a connector 1422. In this embodiment, the connector 1422 and the main body 1421 are integrally structured. Specifically, the connector 1422 protrudes from the upper surface 1421a of the main body 1421, or extends from the upper surface 1421a of the main body 1421 in a direction away from the stator winding 132. The stator winding 132 includes a winding 1323, which is electrically connected to a pin 143e. The projection of the winding 1323 onto the first plane overlaps with the projection of the main body 1421 onto the first plane. This reduces the material used to manufacture the main body 1421, thereby reducing the material used to manufacture the connecting plate assembly 14, thereby reducing the weight and production cost of the electric pump. The stator winding 132 and the connecting plate assembly 14 are arranged along the axial direction of the electric pump. Specifically, the stator winding 132 is closer to the impeller assembly 122 relative to the connector 1422. That is, in the axial direction of the electric pump, the stator winding 132 is located between the connector 1422 and the impeller assembly 122.

[0076] Please refer to Figures 29 and 30. The conductive part 143 includes three conductive bodies 143a. The three conductive bodies 143a all include pins. The pins of the three conductive bodies 143a serve as the U-phase pin end, V-phase pin end and W-phase pin end of the external interface respectively. In this embodiment, the pin parts of the three conductive bodies 143a are arranged side by side. Of course, the pin ends of the three conductive bodies 143a can also be arranged in rows. The specific arrangement position can be adaptively designed according to the interface of the external power supply; each conductive body 143a includes a pin, a main body and a pin. The main body is connected to the pin, and the main body is connected to the pin. Specifically, the conductive body includes a first conductive body 1431, a second conductive body 1432 and a third conductive body 1433. The first conductive body 1431 includes a first body portion 1431a, a first pin 1431b and a first pin 1431c. The first body portion 1431a is connected to the first pin 1431b, and the first body portion 1431a is connected to the first pin 1431c; the second conductive body 1432 includes a second body portion 1432a, a second pin 1432b and a second pin 1432c. The second body portion 1432a is connected to the second pin 1432b, and the second body portion 1432a is connected to the second pin 1432c; the third conductive body 1433 includes a third body portion 1433a, a third pin 1433b and a third pin 1433c. The third body portion 1433a is connected to the third pin 1433b, and the third body portion 1433a is connected to the third pin 1433c.

[0077] Referring to Figure 25 , the conductive body includes a fourth conductive body 1434, which includes a fourth main body portion 1434a, a fourth pin 1434b, and a ground pin 1434c. The fourth main body portion 1434a is connected to the fourth pin 1434b, which is then connected to the ground pin 1434c. The fourth pin 1434b is perpendicular to the plane of the fourth main body portion 1434a, and the ground pin 1434c is perpendicular to the plane of the fourth main body portion 1434a. The fourth pin 1434b is in conductive contact with the stator core 1321 of the stator winding 132, and the ground pin 1434c serves as the ground pin 1434c of the external power interface. This facilitates dissipation of static electricity on the surface of the stator core 1321, thereby preventing static electricity from affecting the performance of the electric pump. The fourth main body portion 1434a is connected to the fourth pin 1434b.

[0078] Referring to Figures 28 to 30 , the first pin 1431c, the second pin 1432c, the third pin 1433c, and the ground pin 1434c extend in the same direction. The connector 1422 has a receiving cavity 1422a, within which a portion of the conductive portion 143 is located. Furthermore, at least a portion of the first pin 1431c, at least a portion of the second pin 1432c, at least a portion of the third pin 1433c, and at least a portion of the ground pin 1434c are located. The connector 1422 allows an external power supply interface to extend into the receiving cavity 1422a and be electrically connected to the conductive member 141. In addition, the connector 1422 can protect the first pin 1431c, the second pin 1432c, the third pin 1433c and the ground pin 1434c, which helps reduce the risk of the first pin 1431c, the second pin 1432c, the third pin 1433c and the ground pin 1434c being skewed during transportation of the electric pump.

[0079] The first pin 1431b, the second pin 1432b, the third pin 1433b, and the fourth pin 1434b extend in the same direction. The first pin 1431b extends in the opposite direction to the first pin 1431c. The first pin 1431b extends perpendicular to the plane of the first conductive body 1431a, or parallel to the central axis of the electric pump, facilitating electrical connection between the first pin 1431b and the stator winding 132. The first pin 1431c extends perpendicular to the plane of the first conductive body 1431a, or parallel to the central axis of the electric pump, facilitating connection between the first pin 1431c and an external power source.

[0080] Referring to Figures 23 and 24 , the insulating frame 1322 includes a fixing portion 13221, which is used to fix the position of the connecting plate assembly 14. The fixing portion 13221 includes a mounting portion 13222 and a positioning portion 13223. The mounting portions 13222 and positioning portions 13223 are spaced apart along the circumference of the stator winding 132. That is, one mounting portion 13222 is located between two positioning portions 13223 circumferentially of the stator winding 132. The provision of the mounting portions 13222 and positioning portions 13223 ensures assembly accuracy when the connecting plate assembly 14 is electrically connected to the stator winding 132. Referring to Figures 27 to 29 , the mounting portion 13222 is connected to the conductive member 141 in a position-limiting manner. In this embodiment, the mounting portion 13222 and the conductive member 143 have an interference fit. The positioning portion 13223 is fixedly connected or position-limitingly connected to the position-limiting member 142. Specifically, the limiting member 142 has a limiting hole 1423, which passes through the upper surface 1421a and the lower surface 1421b of the main body 1421. The positioning portion 13223 is inserted into the limiting hole 1423, which is conducive to positioning the connecting plate assembly 14 to improve the positioning accuracy of the electrical connection between the connecting plate assembly 14 and the stator winding 132.

[0081] Referring to Figures 24 to 26 , the stator winding 132 includes a plurality of stator units 133. These units 133 are assembled into a circular ring to form the stator winding 132. The stator winding 132 includes nine stator units 133. Of course, the stator winding 132 may also include another number of stator units 133, such as six or twelve. The stator units 133 include a stator core unit 133a and an insulating frame unit 133b. The insulating frame unit 133b is injection-molded and fixed to the stator core unit 133a. The stator core unit 133a provides support for the winding 1323, while the insulating frame unit 133b provides support for the wires extending from the winding 1323. The insulating skeleton unit 133b is covered on at least part of the surface of the stator core unit 133a, and the stator units 133 are spliced ​​together one by one to form a ring-shaped stator winding 132. Finally, the stator units 133 can be fixed by clamps or welding to ensure that the stator winding 132 is a whole.

[0082] Please refer to Figures 22 to 30. The stator winding 132 (or stator unit 133) includes a first stator unit 1331, a second stator unit 1332 and a third stator unit 1333. In the circumferential direction of the stator winding 132, the second stator unit 1332 is located between the first stator unit 1331 and the third stator unit 1333; or, in the circumferential direction of the stator winding 132, the first stator unit 1331 is adjacent to the second stator unit 1332, and the third stator unit 1333 is adjacent to the second stator unit 1332. The projection of the first stator unit 1331 on the first plane, the projection of the second stator unit 1332 on the first plane and the projection of the third stator unit 1333 on the first plane overlap with the projection of the connecting plate assembly 14 on the first plane. The first stator unit 1331 includes a first mounting portion 1331c, the second stator unit 1332 includes a second mounting portion 1332c, and the third stator unit 1333 includes a third mounting portion 1333c. Each conductive portion 143 includes a pin 143e, one of which is connected to the first stator unit 1331, one of which is connected to the second stator unit 1332, and the other is connected to the third stator unit 1333. Specifically, the pin 143e includes a first pin 1431b, a second pin 1432b, and a third pin 1433b. The first pin 1431b is limitedly connected to the first mounting portion 1331c, the second pin 1432b is limitedly connected to the second mounting portion 1332c, and the third pin 1433b is limitedly connected to the third mounting portion 1333c. The mounting portion 1331c, the second mounting portion 1332c and the third mounting portion 1333c are respectively located in adjacent stator units. In the axial direction of the stator winding 132, the spacing between the first mounting portion 1331c and the second mounting portion 1332c is small, and the spacing between the second mounting portion 1332c and the third mounting portion 1333c is small. Therefore, the spacing between the first pin 1431b and the second pin 1432b is small, and the spacing between the second pin 1432b and the third pin 1433b is small. When the connecting plate assembly 14 and the stator winding 132 are electrically connected, it is beneficial to improve the positioning of the first pin 1431b, the second pin 1432b and the third pin 1433b, which is beneficial to improve the assembly accuracy of the stator winding 132 and the connecting plate assembly 14, and also helps to reduce the difficulty of preparing the connecting plate assembly 14.

[0083] 24 and 25 , the first stator unit 1331 includes a first stator core monomer 1331a and a first insulating frame monomer 1331b, the second stator unit 1332 includes a second stator core monomer 1332a and a second insulating frame monomer 1332b, and the third stator unit 1333 includes a third stator core monomer 1333a and a third insulating frame monomer 1333b. The first insulating frame monomer 1331b has a first mounting portion 1331c, the second insulating monomer 1332b has a second mounting portion 1332c, and the third insulating monomer 1333b has a third mounting portion 1333c.

[0084] 22 to 30 , the stator winding 132 includes a fourth stator unit 1334 . The fourth stator unit 1334 is adjacent to the third stator unit 1333 in the circumferential direction of the stator winding 132 , and a projection of the fourth stator unit 1334 on the first plane overlaps with a projection of the connecting plate assembly 14 on the first plane. The fourth stator unit 1334 includes a fourth stator core monomer 1334a, and the fourth pin 1434b contacts the fourth stator core monomer 1334a. The extension direction of the fourth pin 1434b is parallel to the central axis of the electric pump. The fourth stator unit 1334 is adjacent to the third stator unit 1333. In the circumferential direction of the stator winding 132, the spacing between the fourth pin 1434b and the third pin 1433c is small, which is beneficial to improve the positioning of the fourth pin 1434b and the third pin 1433c, and is beneficial to improve the assembly accuracy of the stator winding 132 and the connecting plate assembly 14. In addition, it is beneficial to reduce the difficulty of preparing the connecting plate assembly 14.

[0085] The stator winding 132 includes a fifth stator unit 1335. In the circumferential direction of the stator winding 132, the fifth stator unit 1335 is adjacent to the first stator unit 1331, or the fifth stator unit 1335 is adjacent to the fourth stator unit 1334. The projection of the fifth stator unit 1335 on the first plane partially overlaps with the projection of the connecting plate assembly 14 on the first plane. When preparing the connecting plate assembly 14, less material is used for injection molding, which is beneficial to reducing the production cost of the electric pump and reducing the weight of the electric pump.

[0086] 22 to 28, the limiting member 142 includes a first pressing portion 1424a and a second pressing portion 1424b, the first pressing portion 1424a and the second pressing portion 1424b are integrally structured with the main body 1421, the first pin 1431b includes a pin body 143c and an end portion 143d, the pin body 143c is connected to the end portion 143d, the end portion 143d contacts part of the winding 1323, the first pressing portion 1424a is located on one side of the first pin 1431b, and the second pressing portion 1424b is integrally formed with the main body 1421. The wire portion 1424b is located on the other side of the first pin 1431b. A plane parallel to the central axis of the electric pump is defined as a second plane. The projection of the first wire-pressing portion 1424a on the second plane overlaps with the projection of the pin body 143c on the second plane. The projection of the second wire-pressing portion 1424b on the second plane overlaps with the projection of the pin body 143c on the second plane. The first and second wire-pressing portions 1424a, 1424b press the winding wire on both sides of the first pin 1431b, helping to prevent it from derailing. The first and second wire-pressing portions 1424a, 1424b are also provided on both sides of the second and third pins 1432b, 1433b, and their descriptions are not repeated here.

[0087] 23, 25, 27 and 28, the limiting member 142 includes a support portion 1426, a first reinforcement portion 1425a and a second reinforcement portion 1425b. The support portion 1426, the first reinforcement portion 1425a and the second reinforcement portion 1425b are an integral structure with the main body 1421. In the axial direction of the electric pump, the support portion 1426, the first reinforcement portion 1425a and the second reinforcement portion 1425b are arranged from the lower surface 1421a of the main body 1421 toward the stator. The first reinforcement portion 1425a extends radially inward of the support portion 1426, and the second reinforcement portion 1425b is radially outward of the support portion 1426. The first reinforcement portion 1425a and the second reinforcement portion 1425b can enhance the strength of the connecting plate assembly 14. For example, when injection molding is performed using at least a portion of the connecting plate assembly 14 and at least a portion of the stator winding 132 as an insert, the risk of deformation of the connecting plate assembly 14 due to excessive injection pressure can be reduced. The support portion 1426 contacts the stator core 1321 and supports the stator winding 132. For example, when injection molding is performed using at least a portion of the connecting plate assembly 14 and at least a portion of the stator winding 132 as an insert, the support portion 1426 can support the stator winding 132. The central axis of the support portion 1426 coincides with the central axis of the stator winding 132.

[0088] [Corrected on 14.10.2024 according to Rule 26] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify or replace the present application with equivalents, and all technical solutions and improvements thereto that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric pump (100), characterized in that: The electric pump (100) includes a stator winding (132), wherein the stator winding (132) includes an insulating frame (1322) and a winding (1323), wherein the winding (1323) is wound around the insulating frame (1322), wherein the winding (1323) includes a plurality of groups of sub-windings, wherein each group of the sub-windings (1323) includes a connection winding portion (1324), wherein a plurality of the connection winding portions (1324) are adjacently arranged along the circumferential direction of the stator winding, wherein the windings of the plurality of groups of sub-windings are a continuous winding, wherein the winding (1323) includes a first free end portion (1323s) and a second free end portion (1323t), wherein the first free end portion (1323s) is electrically connected to the second free end portion (1323t) via a conductive member (141).

2. The electric pump (100) according to claim 1, characterized in that: The stator winding (132) includes a first group of sub-windings (1323a), a second group of sub-windings (1323b) and a third group of sub-windings (1323c), wherein the first group of sub-windings (1323a) is defined as the sub-winding wound first, the first group of sub-windings (1323a) includes the first free end portion (1323s), the third group of sub-windings (1323c) includes the second free end portion (1323t), the electric pump (100) includes a conductive member (141), the first free end portion (1323s) and the second free end portion (1323t) are electrically connected via the conductive member, and the plurality of connection winding portions (1324) include a first connection winding portion (1324a), a second connection winding portion (1324c), and a third connection winding portion (1324d). 324b) and a third wiring winding portion (1324c), the first free end portion (1323s) includes a first electrical connection segment (1323s1), the second free end portion (1323t) includes a second electrical connection segment (1323t1), the first electrical connection segment (1323s1) and the second electrical connection segment (1323t1) are electrically connected via the conductive member (141), the first electrical connection segment (1323s1) and the second electrical connection segment (1323t1) form the first wiring winding portion (1324a), the second wiring winding portion (1324b), the third wiring winding portion (1324c) and the first wiring winding portion (1324a) are sequentially adjacent to each other along the circumferential direction of the stator winding.

3. The electric pump (100) according to claim 2, characterized in that: The first group of sub-windings (1323a), the second group of sub-windings (1323b), and the third group of sub-windings (1323c) all include three coils, and the three coils of the first group of sub-windings (1323a) are defined as a first coil, a fourth coil, and a seventh coil; the three coils of the second group of sub-windings (1323b) are defined as a second coil, a fifth coil, and an eighth coil; the three coils of the third group of sub-windings (1323c) are defined as a third coil, a sixth coil, and a ninth coil; the first coil includes the first free end portion (1323s), and the first group of sub-windings (1323a) is ... third group of sub-windings (1323c) are defined as a third coil, a sixth coil, and a ninth coil; the first coil includes the first free end portion (13 ) includes a first bridge wire (1323d) and a first connecting wire (1323e), the second group of sub-windings (1323b) includes a second bridge wire (1323f) and a second connecting wire (1323g), the third group of sub-windings (1323c) includes a third bridge wire (1323p) and a third connecting wire (1323q), the bridge wires between the first coil and the fourth coil, and between the fourth coil and the seventh coil are the first bridge wire (1323d), the first group of sub-windings (1323a) and the second group of sub-windings (1323b) are connected via the first connecting wire The second coil and the fifth coil are electrically connected to each other through the second connecting wire (1323e), the bridge wire between the second coil and the fifth coil and the bridge wire between the fifth coil and the eighth coil is the second bridge wire (1323f), the second group of sub-windings (1323b) and the third group of sub-windings (1323c) are electrically connected through the second connecting wire (1323g), the bridge wire between the third coil and the sixth coil and the bridge wire between the sixth coil and the ninth coil is the third bridge wire (1323p), the second free end of the ninth coil and the first free end (1323s) of the first coil are connected through the conductive member Electrically connected, the connecting wire between the ninth coil and the first coil is the third connecting wire (1323q), the first bridge wire (1323d) is on a different side from the first connecting wire (1323e), the second bridge wire (1323f) is on a different side from the second connecting wire (1323g), the third bridge wire (1323p) is on a different side from the third connecting wire (1323q), the second wiring winding portion (1324b) is located on the first connecting wire (1323e), and the second wiring winding portion (1324b) is located on the second connecting wire (1323g).

4. The electric pump (100) according to claim 1, characterized in that: The plurality of groups of sub-windings include a first group of sub-windings (1323a), a second group of sub-windings (1323b) and a third group of sub-windings (1323c), wherein the first group of sub-windings (1323a), the second group of sub-windings (1323b) and the third group of sub-windings (1323c) each include three coils, the first group of sub-windings (1323a) includes a first coil, a fourth coil and a seventh coil, the second group of sub-windings (1323b) includes a second coil, a fourth coil and a seventh coil The fifth coil and the eighth coil, the third group of sub-windings (1323c) includes the third coil, the sixth coil and the ninth coil, the first group of sub-windings (1323a) includes the first wiring portion (1323h) and the second wiring portion (1323i), the second group of sub-windings (1323b) includes the third wiring portion (1323j) and the fourth wiring portion (1323k), the third group of sub-windings (1323c) includes the fifth wiring portion (1323m) and the sixth wiring portion (1323m). The plurality of connection winding portions (1324) include a first connection winding portion (1324a), a second connection winding portion (1324b) and a third connection winding portion (1324c), the first connection portion (1323h) and the sixth connection portion (1323n) are electrically connected, and the first connection winding portion (1324a) is electrically connected to the sixth connection portion (1323n); the second connection winding portion (1324b) and the third connection winding portion (1324c) are electrically connected to each other. The first wiring portion (1323i) is electrically connected to the third wiring portion (1323j), the second wiring portion (1323i) and the third wiring portion (1323j) are electrically connected to the second wiring winding portion (1324b), the fifth wiring portion (1323m) is electrically connected to the fourth wiring portion (1323k), and the third wiring winding portion (1324c) is electrically connected to the fifth wiring portion (1323m) and the fourth wiring portion (1323k); Alternatively, the first wiring portion (1323h) is electrically connected to the fourth wiring portion (1323k), the electrical connection point between the first wiring portion (1323h) and the fourth wiring portion (1323k) is the first wiring winding portion (1324a), the third wiring portion (1323j) is electrically connected to the sixth wiring portion (1323n), the electrical connection point between the third wiring portion (1323j) and the sixth wiring portion (1323n) is the second wiring winding portion (1324b), the second wiring portion (1323i) is electrically connected to the fifth wiring portion (1323m), and the electrical connection point between the second wiring portion (1323i) and the fifth wiring portion (1323m) is the third wiring winding portion (1324c).

5. The electric pump (100) according to claim 2 or 3, characterized in that: The stator winding (132) also includes a mounting portion (1322b), and the insulating skeleton (1322) includes the mounting portion (1322b). The number of the mounting portions (1322b) is the same as the number of groups of the winding (1323). The number of the mounting portions (1322b) is three. The mounting portion corresponding to the first coil is defined as the first mounting portion (1322g), the mounting portion corresponding to the second coil is defined as the second mounting portion (1322h), and the mounting portion corresponding to the third coil is defined as the third mounting portion (1322j). The first winding connection portion (1324a) is located at the first mounting portion (1322g), the second winding connection portion (1324b) is located at the second mounting portion (1322), and the third winding connection portion (1324c) is located at the third mounting portion (1322j).

6. The electric pump (100) according to any one of claims 1 to 5, characterized in that: The insulating frame (1322) includes an anti-slip groove (1322c), the insulating frame (1322) includes a blocking portion (1322d), a winding portion (1322e) and a stop portion (1322f), the blocking portion (1322d) is arranged on one side of the winding portion (1322e), and the stop portion (1322f) is arranged on the other side of the winding portion (1322e), along the radial direction of the electric pump (100), the blocking portion (1322d) is away from the electric pump (100) relative to the stop portion (1322f). 100), the anti-slip groove (1322c) is arranged at the center of the blocking portion (1322d), the anti-slip groove (1322c) is recessed in the upper end of the blocking portion (1322d), along the radial direction of the electric pump (100), the anti-slip groove (1322c) penetrates the thickness direction of the blocking portion (1322d), part of the wiring end is located in the anti-slip groove (1322c), and along the circumferential direction of the electric pump (100), the width value of the anti-slip groove (1322c) is smaller than the wire diameter value of the winding.

7. The electric pump (100) according to claim 6, characterized in that: The blocking portion (1322d) comprises the main body (1322q) and the isolation seat (1322s), the isolation seat (1322s) is fixedly connected to the stator core (1321), the main body (1322q) extends in a direction away from the stator core (1321), the bottom (1322k) of the anti-slip groove (1322c) is an inclined structure, and the end face of the stator core (1321) fixedly connected to the isolation seat (1322s) is defined as the reference plane (102), and the angle between the plane where the bottom (1322k) is located and the reference plane (102) is an acute angle.

8. The electric pump (100) according to any one of claims 1 to 7, characterized in that: The insulating frame (1322) further includes a wire stop portion (1322t), which is arranged along the circumferential direction of the electric pump (100) to protrude from the upper end portion (1322m) of the stop portion (1322d), and the wire stop portion (1322t) is located on one side of the anti-slip groove (1322c).

9. The electric pump according to any one of claims 1 to 8, characterized in that: The electric pump (100) comprises a housing (131), wherein the housing (131) comprises a first housing (1311) and a second housing (1312), wherein the first housing (1311) is formed by at least using the stator winding (132) as an insert injection molding, and a first component (16) is defined, wherein the first component (16) comprises the stator winding (132) and the housing (131), and the second housing (1312) is formed by at least using the first component (16) as an insert injection molding, and the first housing (1311) comprises a first main body (1311a), wherein the first main body (1311a) has There is an inner groove (1311b), the first component (16) includes an injection-molded connection surface (103), the surface that is injection-moldedly connected to the second shell (1312) is the injection-molded connection surface (103), the inner groove (1311b) is recessed in the injection-molded connection surface (103), the second shell (1312) includes a protrusion (1312a), the surface that is injection-moldedly connected to the first shell (1311) is the contact surface (104), the protrusion (1312a) protrudes from the contact surface (104), and the protrusion (1312a) is located in the groove portion (1311b).

10. The electric pump according to claim 1, characterized in that: The electric pump comprises a stator winding (132) and a connecting plate assembly (14), wherein the connecting plate assembly (14) comprises a plurality of conductive parts (143) and a main body (1421), wherein the conductive part (143) is fixedly connected to the main body (1421), wherein the conductive part (143) comprises a plug pin (143e), wherein the stator winding (132) comprises at least two adjacent stator units (133), wherein at least two of the plug pins (143e) are located in adjacent stator units (133), wherein the extension direction of the plug pin (143e) is perpendicular to the main body (1421), wherein a plane perpendicular to the central axis of the electric pump is defined as a first plane, wherein a projection of the stator winding (132) on the first plane is a first projection, wherein a projection of the main body (1421) on the first plane is a second projection, and wherein an area of ​​the first projection is greater than an area of ​​the second projection.

11. The electric pump according to claim 10, characterized in that: The stator winding (132) includes a winding (1323), the winding (1323) is electrically connected to the pin (143e), and a portion of the projection of the winding (1323) on the first plane overlaps with a projection of the main body (1421) on the first plane.

12. The electric pump according to claim 10 or 11, characterized in that: The stator unit (133) includes a first stator unit (1331), a second stator unit (1332) and a third stator unit (1333). In the circumferential direction of the stator winding (132), the first stator unit (1331) and the second stator unit (1332) are adjacent to each other, and the second stator unit (1332) and the third stator unit (1333) are adjacent to each other. The projection of the first stator unit (1331) on the first plane, the projection of the second stator unit (1332) on the first plane and the projection of the third stator unit (1333) on the first plane overlap with the projection of the connecting plate assembly (14) on the first plane.

13. The electric pump according to claim 12, characterized in that: The stator unit (133) includes a first stator unit (1331), a second stator unit (1332) and a third stator unit (1333). In the circumferential direction of the stator winding (132), the first stator unit (1331) and the second stator unit (1332) are adjacent to each other, and the second stator unit (1332) and the third stator unit (1333) are adjacent to each other. The projection of the first stator unit (1331) on the first plane, the projection of the second stator unit (1332) on the first plane and the projection of the third stator unit (1333) on the first plane overlap with the projection of the connecting plate assembly (14) on the first plane.

14. The electric pump according to claim 13, characterized in that The stator unit (133) includes a fourth stator unit (1334). In the circumferential direction of the stator winding (132), the fourth stator unit (1334) is adjacent to the third stator unit (1333), and the projection of the fourth stator unit (1334) on the first plane overlaps with the projection of the connecting plate assembly (14) on the first plane.

15. The electric pump according to claim 14, characterized in that The pin (143e) includes a fourth pin (1434b), the extension direction of the fourth pin (1434b) is parallel to the central axis of the electric pump, the fourth stator unit (1334) includes a fourth stator core monomer (1334a), and the fourth pin (1434b) contacts the fourth stator core monomer (1334a).

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