CN221126998U - Electric pump - Google Patents

Abstract

The embodiment of the application discloses an electric pump, which comprises a stator winding and a connecting plate assembly, wherein the connecting plate assembly comprises a plurality of conductive parts and a body part, the conductive parts are fixedly connected with the body part, each conductive part comprises a contact pin, each stator winding comprises at least two adjacent stator units, at least two contact pins are positioned on the adjacent stator units, a plane perpendicular to a central axis of the electric pump is defined as a first plane, the projection of each stator winding on the first plane is a first projection, the projection of each body part on the first plane is a second projection, and the area of each first projection is larger than that of each second projection. The application has the characteristic of reducing the weight of the electric pump.

Description

Electric pump

[ Field of technology ]

The present application relates to the field of vehicles, and more particularly to components of a vehicle lubrication system and/or cooling system.

[ Background Art ]

The motor pump comprises a stator winding and a connecting plate assembly, the connecting plate assembly comprises a plurality of conductive parts, the conductive parts are electrically connected with the stator winding, and if the conductive parts are far apart, more materials are used for preparing the connecting plate assembly, so that the weight of the motor pump is increased. Therefore, it is a technical problem how to reduce the weight of the electric pump.

[ utility model ]

The application aims to provide an electric pump, which is beneficial to reducing materials used for preparing a connecting plate assembly and further is beneficial to reducing the weight of the electric pump.

In order to achieve the above object, one embodiment of the present application adopts the following technical scheme:

The utility model provides an electric pump, electric pump includes stator winding and connecting plate subassembly, the connecting plate subassembly includes a plurality of conductive parts and body portion, conductive parts with body portion fixed connection, conductive parts includes the contact pin, stator winding includes at least two adjacent stator units, at least two the contact pin is located adjacent stator units, define the perpendicular to the face of the center pin of electric pump and be first plane, stator winding is in first planar projection is first projection, body portion is in first planar projection is the second projection, first projected area is greater than the area of second projection.

In the above technical scheme, the conductive part comprises the contact pin, the stator winding comprises at least two adjacent stator units, the surface perpendicular to the central axis of the electric pump is defined as a first plane, the projection of the stator winding on the first plane is a first projection, the projection of the body part on the first plane is a second projection, the area of the first projection is larger than that of the second projection, the projection area of the body part is relatively smaller, and the at least two contact pins are located adjacent stator units.

[ Description of the drawings ]

FIG. 1 is a schematic diagram of an electric pump according to an embodiment of the present application;

FIG. 2 is a schematic view of a first view of the stator winding and connection plate assembly connection;

FIG. 3 is a schematic view of a second view of the stator winding and connection plate assembly connection;

FIG. 4 is a schematic view of the stator winding of FIG. 2 from a first perspective;

FIG. 5 is a schematic diagram of a second view of the stator winding of FIG. 2;

FIG. 6 is a schematic view of a first stator unit or a second stator unit or a third stator unit;

FIG. 7 is a schematic view of a first view of the web assembly;

FIG. 8 is a schematic view of a second view of the web assembly;

FIG. 9 is a schematic view of a first view of a conductive element;

Fig. 10 is a schematic diagram of a second view of the conductive member.

Reference numerals: 11. a pump cover; 12. a rotating assembly; 121. a rotor assembly; 122. an impeller assembly; 13. a stator assembly; 131. a housing; 132. a stator winding; 1321. a stator core; 1322. an insulating skeleton; 13221. a fixing part; 13222. a mounting part; 13223. a positioning part; 1323. a winding; 133. a stator unit; 133a, stator core monomers; 133b, insulating backbone monomers; 1331. a first stator unit; 1331a, a first stator core unit; 1331b, a first insulating backbone monomer; 1331c, a first mounting portion; 1332. a second stator unit; 1332a, a second stator core unit; 1332b, a second insulating backbone monomer; 1332c, a second mounting portion; 1333. a third stator unit; 1333a, a third stator core unit; 1333b, a third insulating backbone monomer; 1333c, a third mounting portion; 1334. a fourth stator unit; 1334a, a fourth stator core unit; 1335. a fifth stator unit; 14. a connecting plate assembly; 141. a conductive member; 142. a limiting piece; 1421. a body portion; 1421a, upper surface; 1421b, lower surface; 1422. a plug-in part; 1422a, receiving chamber; 1423. a limiting hole; 1424a, a first wire section; 1424b, a second wire section; 1425a, a first reinforcement; 1425b, a second reinforcement; 1426. a support part; 143. a conductive portion; 143a, conductive bodies; 143b, an auxiliary part; 143c, a pin body; 143d, end portions; 143e, pins; 1431. a first conductive body; 1431a, a first body portion; 1431b, a first pin; 1431c, first pin; 1432. a second conductive body; 1432a, a second body portion; 1432b, a second pin; 1432c, second pin; 1433. a third conductive body; 1433a, a third body portion; 1433b, third pin; 1433c, third pin; 1434. a fourth conductive body; 1434a, a fourth body portion; 1434b, fourth pin; 1434c, ground pin; 15. a shaft; 16. a rotor cavity; 17. an impeller chamber.

[ Detailed description ] of the invention

The application is further described with reference to the drawings and the specific embodiments below:

In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings and the detailed description. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. The terms upper, lower, etc. used herein are defined with respect to the positions of the components shown in the drawings, and are merely for clarity and convenience of presentation, it should be understood that the terms used herein should not limit the scope of the application as claimed.

Referring to fig. 1 to 10, the present application provides an electric pump including a pump cover 11, a rotary assembly 12, a stator assembly 13, the stator assembly 13 including a connection 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. Here, the term "seal-fixing" means preventing the working medium from leaking to the outside of the electric pump when the electric pump is operated. The shaft 15 is injection-fixed with the housing 131. It will be appreciated that a portion of the shaft 15 is embedded in the housing 131, the electric pump having a pump cavity in which the rotary assembly 12 is located, the pump cavity including a rotor cavity 16 and an impeller cavity 17, the rotor cavity 16 and the impeller cavity 17 communicating. The rotating assembly 12 includes a rotor assembly 121 and an impeller assembly 122, the rotor assembly 121 including permanent magnets, the rotor assembly 121 being located radially inward of the stator windings 132. At least part of the rotor assembly 121 is located in the rotor chamber 16 and the impeller assembly 122 is located in the impeller chamber 17, through which the working medium can flow. In a specific embodiment, the other end of the shaft 15 is at least partially located in the rotor cavity 16, and at least a portion of the rotating assembly 12 is sleeved on the outer periphery of the shaft 15, and the rotating assembly 12 is in transmission connection with 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 connection plate assembly 14 includes a limiting member 142 and a conductive member 141, wherein the limiting member 142 is in limiting connection or fixed connection with the stator winding 132, and the conductive member 141 is in limiting connection or fixed connection with the limiting member 142. As a further embodiment, the electric pump may of course also not comprise a pump cover 11, the pump cover 11 being integrated in an external structure. The arrangement is more beneficial to the integrated design of the electric pump, so that the structure of the electric pump is more compact, and the miniaturization and the light weight of the structure of the electric pump are more beneficial. In operation of the electric pump, the rotating assembly 12 rotates about the shaft 15 under the influence of the excitation magnetic field by controlling the current of the stator windings 132 and thus the excitation magnetic field generated by the stator windings 132.

Referring to fig. 2 to 10, the electric pump further includes a connection board assembly 14, the connection board assembly 14 is electrically connected to the stator winding 132, the connection board assembly 14 includes a plurality of conductive portions 143 and a body portion 1421, the conductive portions 143 are fixedly connected to the body portion 1421, the conductive portions 143 include pins 143e, the stator winding 132 includes at least two adjacent stator units 133, at least two pins 143e are located in the adjacent stator units 133, an extending direction of the pins 143e is perpendicular to the body portion 1421, a plane perpendicular to a central axis of the electric pump is defined as a first plane, a projection of the stator winding 132 on the first plane is a first projection, a projection of the body portion 1421 on the first plane is a second projection, and an area of the first projection is larger than an area of the second projection. The projected area of the body portion 1421 is relatively small, and less material is used to make the body portion 1421, which in turn facilitates reducing the material used to make the web assembly 14, thereby facilitating reducing the weight of the electric pump and reducing the manufacturing cost of the electric pump.

The connecting plate assembly 14 comprises a limiting piece 142 and a conductive piece 141, the limiting piece 142 is formed by injection molding at least by taking the conductive piece 141 as an insert, the manufacturing process of the connecting plate assembly 14 is relatively simple, and the production efficiency of the connecting plate assembly is relatively improved. The conductive member 141 is connected to the stator winding 132, and the limiting member 142 is an injection molded member, and a portion of the limiting member 142 in contact with the conductive member 141 is non-conductive, so that current passing through the conductive member 141 is advantageously prevented from leaking from the limiting member 142 when the electric pump is in operation. The conductive member 141 includes a plurality of conductive portions 143, and the conductive portions 143 are connected to the stator winding 132.

Referring to fig. 2 to 8, the limiting member 142 includes a body portion 1421 and a plug portion 1422, in this embodiment, the plug portion 1422 and the body portion 1421 are integrally formed, specifically, the plug portion 1422 is disposed protruding from an upper surface 1421a of the body portion 1421, or the plug portion 1422 extends from the upper surface 1421a of the body portion 1421 in a direction away from the stator winding 132. The stator winding 132 includes a winding 1323, the winding 1323 is electrically connected with the pin 143e, and a projection of the winding 1323 on the first plane overlaps with a projection of the body portion 1421 on the first plane, so that less material is used for preparing the body portion 1421, thereby being beneficial to reducing the material used for preparing the connection board assembly 14, thereby being beneficial to reducing the weight of the electric pump and reducing the production cost of the electric pump. The stator windings 132 and the connection plate assembly 14 are arranged in the axial direction of the electric pump, specifically, the stator windings 132 are closer to the impeller assembly 122 with respect to the connector 1422, that is, the stator windings 132 are located between the connector 1422 and the impeller assembly 122 in the axial direction of the electric pump.

Referring to fig. 9 and 10, the conductive portion 143 includes three conductive bodies 143a, the three conductive bodies 143a include pins, the pins of the three conductive bodies 143a are respectively used as a U-phase pin end, a V-phase pin end and a W-phase pin end of an external interface, in this embodiment, the pin portions of the three conductive bodies 143a are arranged side by side, however, the pin ends of the three conductive bodies 143a may also be arranged in rows, and specific arrangement positions may be adaptively designed according to the interface of the external power supply; each conductive body 143a includes a pin, a body portion, and a pin, the body portion connecting 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.

Referring to fig. 5, the conductive body includes a fourth conductive body 1434, the fourth conductive body 1434 includes a fourth body portion 1434a, a fourth pin 1434b and a ground pin 1434c, the fourth body portion 1434a is connected to the fourth pin 1434b, the fourth body portion 1434a is connected to the ground pin 1434c, the fourth pin 1434b is perpendicular to a plane in which the fourth body portion 1434a is located, the ground pin 1434c is perpendicular to a plane in which the fourth body portion 1434a is located, the fourth pin 1434b is in conductive contact with the stator core 1321 of the stator winding 132, and the ground pin 1434c is used as the ground pin 1434c of the external power interface, which is beneficial to guiding out static electricity on the surface of the stator core 1321, and is beneficial to preventing static electricity from affecting the performance of the electric pump. The fourth body portion 1434a is connected to a fourth pin 1434b.

Referring to fig. 8 to 10, the extending direction of the first pin 1431c, the extending direction of the second pin 1432c, the extending direction of the third pin 1433c, and the extending direction of the ground pin 1434c are the same. The socket portion 1422 has a receiving cavity 1422a, a portion of the conductive portion 143 is disposed in the receiving cavity 1422a, and further, 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 disposed in the receiving cavity 143a, so that an interface of an external power source can extend into the receiving cavity 1422a and be electrically connected to the conductive member 141 by providing the socket portion 1422. The external plug portion 1422 can protect the first pin 1431c, the second pin 1432c, the third pin 1433c and the ground pin 1434c, which is beneficial to reducing the risk of the first pin 1431c, the second pin 1432c, the third pin 1433c and the ground pin 1434c being skewed during the transportation of the electric pump.

The extending direction of the first pin 1431b, the extending direction of the second pin 1432b, the extending direction of the third pin 1433b, and the extending direction of the fourth pin 1434b are the same, and the extending direction of the first pin 1431b is opposite to the extending direction of the first pin 1431 c. The extending direction of the first contact pin 1431b is perpendicular to the plane where the first conductive main body 1431a is located, or the extending direction of the first contact pin 1431b is parallel to the central axis of the electric pump, so that the first contact pin 1431b is electrically connected with the stator winding 132; the extending direction of the first pin 1431c is perpendicular to the plane of the first conductive body 1431 a; or the extending direction of the first pin 1431c is parallel to the central axis of the electric pump, which is beneficial for plugging the first pin 1431c with an external power supply.

Referring to fig. 3 and 4, the insulating skeleton 1322 includes a fixing portion 13221, the fixing portion 13221 is used for fixing a position of the connecting plate assembly 14, the fixing portion 13221 includes an installation portion 13222 and a positioning portion 13223, the installation portion 13222 and the positioning portion 13223 are arranged along a circumferential direction of the stator winding 132 at intervals, that is, in the circumferential direction of the stator winding 132, 1 installation portion 13222 is located between two positioning portions 13223, and by arranging the installation portion 13222 and the positioning portion 13223, assembly accuracy when the connecting plate assembly 14 is electrically connected with the stator winding 132 is ensured. Referring to fig. 7 to 9, the mounting portion 13222 is in limited connection with the conductive member 141, and in this embodiment, the mounting portion 13222 is in interference fit with the conductive portion 143. The positioning portion 13223 is fixedly connected or limitedly connected with the limiter 142. Specifically, the limiting member 142 has a limiting hole 1423, the limiting hole 1423 penetrates through the upper surface 1421a and the lower surface 1421b of the body portion 1421, and the positioning portion 13223 is inserted into the limiting hole 1423, so as to facilitate positioning the connecting plate assembly 14, so as to improve the positioning accuracy of the electrical connection between the connecting plate assembly 14 and the stator winding 132.

Referring to fig. 4 to 6, the stator winding 132 includes a plurality of stator units 133, the stator units 133 are assembled into a whole torus to form the stator winding 132, and the stator winding 132 includes 9 stator units 133, however, the stator winding 132 may also include other numbers of stator units 133, for example, six or twelve stator units 133. The stator unit 133 includes a stator core unit 133a and an insulating skeleton unit 133b, where the insulating skeleton unit 133b is injection-fixed with the stator core unit 133a, and the stator core unit 133a provides support for the winding 1323, and the insulating skeleton unit 133b can provide support for the winding led out by the winding 1323. The insulating skeleton unit 133b is coated on at least part of the surface of the stator core unit 133a, the stator units 133 are spliced one by one to form the annular stator winding 132, and finally the stator units 133 can be fixed in a clamping band or welding mode, so that the stator winding 132 is ensured to be an integral body.

Referring to fig. 7 to 10, the stator winding 132 (or the stator unit 133) includes a first stator unit 1331, a second stator unit 1332, and a third stator unit 1333, and the second stator unit 1332 is located between the first stator unit 1331 and the third stator unit 1333 in the circumferential direction of the stator winding 132; or in the circumferential direction of the stator winding 132, the first stator unit 1331 is adjacent to the second stator unit 1332, the third stator unit 1333 is adjacent to the second stator unit 1332, and the projections of the first stator unit 1331, the second stator unit 1332, and the third stator unit 1333 overlap with the projection of the connection plate assembly 14. The first stator unit 1331 comprises a first mounting portion 1331c, the second stator unit 1332 comprises a second mounting portion 1332c, the third stator unit 1333 comprises a third mounting portion 1333c, each conducting portion 143 comprises a contact pin 143e, one contact pin 143e is connected with the first stator unit 1331, one contact pin 143e is connected with the second stator unit 1332, the other contact pin 143e is connected with the third stator unit 1333, the contact pin 143e comprises a first contact pin 1431b, a second contact pin 1432b and a third contact pin 1433b, the first contact pin 1431b is in limiting connection with the first mounting portion 1331c, the second contact pin 1432b is in limiting connection with the second mounting portion 1332c, the third contact pin 1433b is in limiting connection with the third mounting portion 1333c, the first mounting portion 1331c, the second mounting portion 1332c and the third mounting portion 1333c are respectively located in the adjacent stator units, in the axial direction of the stator winding 132, the distance between the first mounting portion 1331c and the second mounting portion 1332c and the second contact pin 1432b is smaller than the distance between the first contact pin 1432b and the third contact pin 1432b, the distance between the first contact pin 1432b and the second contact pin 1432b is better than that between the first contact pin and the second contact pin 1432b and the third contact pin 1432b is in making the assembly 14, and the distance between the first contact pin and the second contact pin 1432b is better than that between the first contact pin and the assembly and the contact pin 1432b is 14 b.

Referring to fig. 4 and 5, the first stator unit 1331 includes a first stator core unit 1331a and a first insulating frame unit 1331b, the second stator unit 1332 includes a second stator core unit 1332a and a second insulating frame unit 1332b, the third stator unit 1333 includes a third stator core unit 1333a and a third insulating frame unit 1333b, the first insulating frame unit 1331b has a first mounting portion 1331c, the second insulating unit 1332b has a second mounting portion 1332c, and the third insulating unit 1333b has a third mounting portion 1333c.

Referring to fig. 2 to 10, the stator winding 132 includes a fourth stator unit 1334, and in the circumferential direction of the stator winding 132, the fourth stator unit 1334 is adjacent to the third stator unit 1333, and a projection of the fourth stator unit 1334 on the first plane overlaps with a projection of the connection plate assembly 14 on the first plane. The fourth stator unit 1334 includes a fourth stator core unit 1334a, the fourth pin 1434b contacts the fourth stator core unit 1334a, the extending 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, the interval between the fourth pin 1434b and the third pin 1433c is smaller in the circumferential direction of the stator winding 132, the position degree of the fourth pin 1434b and the third pin 1433c is beneficial to improving the assembly precision of the stator winding 132 and the connecting plate assembly 14, and in addition, the preparation difficulty of the connecting plate assembly 14 is beneficial to reducing.

The stator winding 132 includes a fifth stator unit 1335, and 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, and the projection of the fifth stator unit 1335 on the first plane overlaps with the projection of the connection plate assembly 14 on the first plane, so that less material is used for injection molding when preparing the connection plate assembly 14, which is beneficial to reducing the production cost of the electric pump and the weight of the electric pump.

Referring to fig. 2 to 8, 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 configured with the body portion 1421, the first pin 1431b includes a pin main body 143c and an end 143d, the pin main body 143c is connected to the end 143d, the end 143d contacts a portion of the winding 1323, the first pressing portion 1424a is located on one side of the first pin 1431b, the second pressing portion 1424b is located on the other side of the first pin 1431b, a plane parallel to a central axis of the electric pump is defined as a second plane, a projection of the first pressing portion 1424a on the second plane overlaps a projection of the pin main body 143c on the second plane, and a projection of the second pressing portion 1424b on both sides of the first pin 1431b is beneficial to avoiding wire-off-winding. The second pin 1432b and the third pin 1433b are also provided with a first pressing portion 1424a and a second pressing portion 1424b on both sides, which are not repeated here.

Referring to fig. 3, 5, 7 and 8, the limiting member 142 includes a supporting portion 1426, a first reinforcing portion 1425a and a second reinforcing portion 1425b, the supporting portion 1426, the first reinforcing portion 1425a and the second reinforcing portion 1425b are integrally formed with the body portion 1421, and in the axial direction of the electric pump, the supporting portion 1426, the first reinforcing portion 1425a and the second reinforcing portion 1425b extend from the lower surface 1421a of the body portion 1421 towards the direction close to the stator winding 132, the first reinforcing portion 1425a is located radially inside the supporting portion 1426, the second reinforcing portion 1425b is located radially outside the supporting portion 1426, and the first reinforcing portion 1425a and the second reinforcing portion 1425b can enhance the strength of the connecting plate assembly 14, for example, when at least a portion of the connecting plate assembly 14 and at least a portion of the stator winding 132 are used as an insert are used for injection molding, so as to facilitate reducing the risk of deformation of the connecting plate assembly 14 due to excessive injection molding pressure. The support portion 1426 contacts the stator core 1321, and the support portion 1426 supports the stator winding 132, for example, when at least part of the connection plate assembly 14 and at least part of the stator winding 132 are injection molded as an insert, the support portion 1426 may support the stator winding 132, and a central axis of the support portion 1426 coincides with a central axis of the stator winding 132.

It should be noted that: although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application may be modified or equivalent thereto without departing from the spirit and scope of the application, and all such modifications and improvements thereof are intended to be included within the scope of the appended claims.

Claims (16)

1. The utility model provides an electric pump, its characterized in that, electric pump includes stator winding (132) and connecting plate subassembly (14), connecting plate subassembly (14) include a plurality of conductive part (143) and body portion (1421), conductive part (143) with body portion (1421) fixed connection, conductive part (143) include contact pin (143 e), stator winding (132) include at least two adjacent stator unit (133), at least two contact pin (143 e) are located adjacent stator unit (133), define the face perpendicular to electric pump's center pin be first plane, the projection of stator winding (132) in first plane is first projection, the projection of body portion (1421) in first plane is the second projection, the area of first projection is greater than the area of second projection.

2. The electric pump of claim 1, wherein the stator winding (132) includes a winding (1323), the winding (1323) being electrically connected to the pin (143 e), a portion of the projection of the winding (1323) in the first plane overlapping a projection of the body portion (1421) in the first plane.

3. The electric pump according to claim 1 or 2, characterized in that the stator unit (133) comprises a first stator unit (1331), a second stator unit (1332) and a third stator unit (1333), the first stator unit (1331) and the second stator unit (1332) being adjacent in the circumferential direction of the stator winding (132), the second stator unit (1332) being adjacent to the third stator unit (1333), 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 overlapping the projection of the connection plate assembly (14) on the first plane.

4. The electric pump according to claim 3, wherein the first stator unit (1331) comprises a first mounting portion (1331 c), the second stator unit (1332) comprises a second mounting portion (1332 c), the third stator unit (1333) comprises a third mounting portion (1333 c), the pin (143 e) comprises a first pin (1431 b), a second pin (1432 b) and a third pin (1433 b), the first pin (1431 b) is in limiting connection with the first mounting portion (1331 c), the second pin (1432 b) is in limiting connection with the second mounting portion (1332 c), and the third pin (1433 b) is in limiting connection with the third mounting portion (1333 c).

5. The electric pump according to claim 4, characterized in that the stator unit (133) comprises a fourth stator unit (1334), the fourth stator unit (1334) being adjacent to the third stator unit (1333) in the circumferential direction of the stator windings (132), the projection of the fourth stator unit (1334) in the first plane overlapping the projection of the connection plate assembly (14) in the first plane.

6. The electric pump according to claim 5, wherein the pin (143 e) includes a fourth pin (1434 b), an extending direction of the fourth pin (1434 b) is parallel to a central axis of the electric pump, the fourth stator unit (1334) includes a fourth stator core unit (1334 a), and the fourth pin (1434 b) contacts the fourth stator core unit (1334 a).

7. The electric pump according to claim 5 or 6, characterized in that the stator unit (133) comprises a fifth stator unit (1335), the fifth stator unit (1335) being adjacent to the first stator unit (1331) or the fifth stator unit (1335) being adjacent to the fourth stator unit (1334) in the circumferential direction of the stator windings (132), the projection of the fifth stator unit (1335) at the first plane overlapping the projection of the connection plate assembly (14) at the first plane.

8. The electric pump of claim 5 or 6, wherein the connection plate assembly (14) includes a limiting member (142), the limiting member (142) includes a first wire pressing portion (1424 a) and a second wire pressing portion (1424 b), the first pin (1431 b) includes a pin body (143 c) and an end (143 d), the pin body (143 c) is connected to the end (143 d), the end (143 d) contacts a portion of the winding (1323), the first wire pressing portion (1424 a) is located on one side of the first pin (1431 b), and the second wire pressing portion (1424 b) is located on the other side of the first pin (1431 b).

9. The electric pump of claim 7, wherein the connection plate assembly (14) includes a limiting member (142), the limiting member (142) includes a first wire pressing portion (1424 a) and a second wire pressing portion (1424 b), the first pin (1431 b) includes a pin body (143 c) and an end (143 d), the pin body (143 c) is connected to the end (143 d), the end (143 d) contacts a portion of the winding (1323) and is wound, the first wire pressing portion (1424 a) is located on one side of the first pin (1431 b), and the second wire pressing portion (1424 b) is located on the other side of the first pin (1431 b).

10. The electric pump of claim 5 or 6, wherein the connection plate assembly (14) includes a stopper (142), the stopper (142) includes a support portion (1426), a first reinforcement portion (1425 a) and a second reinforcement portion (1425 b), the first reinforcement portion (1425 a) is located radially inward of the support portion (1426), the second reinforcement portion (1425 b) is located radially outward of the support portion (1426), the stator winding (132) includes a stator core (1321), the support portion (1426) contacts the stator core (1321), and a central axis of the support portion (1426) coincides with a central axis of the stator winding (132).

11. The electric pump of claim 7, wherein the connection plate assembly (14) includes a stopper (142), the stopper (142) includes a support portion (1426), a first reinforcement portion (1425 a) and a second reinforcement portion (1425 b), the first reinforcement portion (1425 a) is located radially inward of the support portion (1426), the second reinforcement portion (1425 b) is located radially outward of the support portion (1426), the stator winding (132) includes a stator core (1321), the support portion (1426) contacts the stator core (1321), and a central axis of the support portion (1426) coincides with a central axis of the stator winding (132).

12. The electric pump of claim 8, wherein the connection plate assembly (14) includes a stopper (142), the stopper (142) includes a support portion (1426), a first reinforcement portion (1425 a) and a second reinforcement portion (1425 b), the first reinforcement portion (1425 a) is located radially inward of the support portion (1426), the second reinforcement portion (1425 b) is located radially outward of the support portion (1426), the stator winding (132) includes a stator core (1321), the support portion (1426) contacts the stator core (1321), and a central axis of the support portion (1426) coincides with a central axis of the stator winding (132).

13. The electric pump of claim 9, wherein the connection plate assembly (14) includes a stopper (142), the stopper (142) includes a support portion (1426), a first reinforcement portion (1425 a) and a second reinforcement portion (1425 b), the first reinforcement portion (1425 a) is located radially inward of the support portion (1426), the second reinforcement portion (1425 b) is located radially outward of the support portion (1426), the stator winding (132) includes a stator core (1321), the support portion (1426) contacts the stator core (1321), and a central axis of the support portion (1426) coincides with a central axis of the stator winding (132).

14. The electric pump according to claim 1 or 2, characterized in that the connection plate assembly (14) comprises a limiting member (142) and a conductive member (141), the conductive member (141) comprises a plurality of conductive portions (143), and the limiting member (142) is injection molded by insert molding at least with the conductive member (141).

15. An electric pump according to claim 3, characterized in that the connection plate assembly (14) comprises a limiting member (142) and a conductive member (141), the conductive member (141) comprises a plurality of conductive portions (143), and the limiting member (142) is injection molded at least by insert molding of the conductive member (141).

16. The electric pump according to any one of claims 4-6, characterized in that the connection plate assembly (14) comprises a limiting member (142) and a conductive member (141), the conductive member (141) comprises a plurality of conductive portions (143), and the limiting member (142) is injection molded at least by using the conductive member (141) as an insert.