Electric pump and integrated assembly

Abstract

The utility model provides an electric pump which comprises a motor shell and a pump cover, the motor shell is fixedly connected with the pump cover, the relative matching part of the motor shell and the pump cover is defined as a matching part, the matching part comprises a head part and a tail part, the electric pump comprises an inner cavity, the head part is exposed out of the inner cavity, the tail part forms part of the outer surface of the electric pump, and the motor shell comprises an outer wall part. The outer wall portion and an outer inner wall portion are arranged in a sealed mode, the electric pump comprises an inner groove, the inner groove is concave inwards from the outer wall portion to the direction of the central axis of the electric pump in the radial direction of the electric pump, and the inner groove is far away from the pump cover relative to the tail portion in the axial direction of the electric pump. Therefore, the leakage of the working medium to the whole thermal management system is reduced, and the potential safety hazard of the whole thermal management system is reduced.

Description

Technical Field

[0001] This application relates to the field of thermal management, and more particularly to an electric pump and integrated assembly for automotive, energy storage, or commercial use. Background Technology

[0002] The electric pump includes a pump cover and a motor housing. The pump cover and the motor housing are sealed together. The electric pump includes an inner cavity through which the working medium can flow. Currently, the working medium leaks to the outside of the electric pump through the sealed connection between the pump cover and the motor housing, posing a certain safety hazard to the entire thermal management system that works with the electric pump. Utility Model Content

[0003] The purpose of this application is to provide an electric pump that helps reduce safety hazards in the entire thermal management system.

[0004] To achieve the above objectives, one technical solution of this application is as follows: an electric pump, comprising a motor housing and a pump cover, the motor housing and the pump cover being fixedly connected, the part where the motor housing and the pump cover mate relative to each other being defined as a mating part, the mating part comprising a head and a tail, the electric pump comprising an inner cavity, the head being exposed in the inner cavity, the tail forming part of the outer surface of the electric pump, the motor housing comprising an outer wall portion, the outer wall portion being sealed to an outer inner wall portion, the electric pump comprising an inner groove, along the radial direction of the electric pump, the inner groove being recessed from the outer wall portion toward the central axis of the electric pump, and along the axial direction of the electric pump, the inner groove being away from the pump cover relative to the tail portion.

[0005] The technical solution of this application includes an electric pump with an inner groove. Along the radial direction of the electric pump, the inner groove is recessed from the outer wall towards the central axis of the electric pump. Along the axial direction of the electric pump, the inner groove is located away from the pump cover relative to the mating part. When mating with the outer inner wall, a sealing part can be provided within the inner groove. Thus, if leakage occurs in the sealing connection between the pump cover and the motor housing, the leaked working medium is sealed by the sealing part provided in the inner groove. This helps reduce the leakage of the working medium to the outside of the entire thermal management system, thereby reducing potential safety hazards associated with the entire thermal management system.

[0006] One technical solution of this application is as follows: An integrated component includes a mounting cavity, the wall of which includes an inner wall. The inner wall is sealed to an external electric pump. The electric pump includes a motor housing and a pump cover, which are fixedly connected. The mating part between the motor housing and the pump cover is defined as the mating part, which includes a head and a tail. The electric pump includes an inner cavity, with the head exposed therein and the tail forming part of the outer surface of the electric pump. The motor housing includes an outer wall, which is sealed to the inner wall. The electric pump includes an inner groove. Along the radial direction of the electric pump, the inner groove is recessed from the outer wall towards the central axis of the electric pump. Along the axial direction of the electric pump, the inner groove is farther away from the pump cover than the tail. In this way, when the electric pump mates with the inner wall, a sealing part can be provided within the inner groove. Thus, if leakage occurs in the sealed connection between the pump cover and the motor housing, the leaked working medium is sealed by the sealing part within the inner groove. This helps reduce the leakage of the working medium to the outside of the entire thermal management system, thereby reducing potential safety hazards associated with the entire thermal management system.

[0007] One technical solution of this application is as follows: An integrated component includes an electric pump and a flow channel plate. The flow channel plate includes a mounting cavity, and the wall portion corresponding to the mounting cavity includes an inner wall portion. The electric pump is sealed to the flow channel plate. The electric pump includes a motor housing and a pump cover. The motor housing and the pump cover are fixedly connected. The part where the motor housing and the pump cover mate relative to each other is defined as a mating part. The mating part includes a head and a tail. The electric pump includes an inner cavity, with the head exposed in the inner cavity and the tail portion forming part of the outer surface of the electric pump. The motor housing includes an outer wall portion, which is sealed to an outer inner wall portion. The electric pump includes an inner groove. Along the radial direction of the electric pump, the inner groove is recessed from the outer wall portion toward the central axis of the electric pump. Along the axial direction of the electric pump, the inner groove is away from the pump cover relative to the tail portion. In this way, when the outer wall part fits into the inner wall part, a sealing part can be set in the inner groove. In this way, if there is a leak in the sealing connection between the pump cover and the motor housing, the leaked working medium is sealed by the sealing part set in the inner groove. This helps to reduce the leakage of the working medium to the outside of the entire thermal management system, thus reducing the safety hazards of the entire thermal management system. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of the electric pump technical solution of this application.

[0009] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the electric pump.

[0010] Figure 3 yes Figure 1 A schematic diagram of the structure along section XX.

[0011] Figure 4 yes Figure 3 Enlarged structural diagram at point I.

[0012] Figure 5 yes Figure 3 A three-dimensional structural diagram of the middle stator assembly in one direction.

[0013] Figure 6 yes Figure 3 A three-dimensional structural diagram of the pump cover in one direction.

[0014] Figure 7 yes Figure 3 A three-dimensional structural diagram of the first component in one direction.

[0015] Figure 8 It is a cross-sectional structural diagram of the integrated component in one direction.

[0016] Figure 9 yes Figure 8 Schematic diagram of the large structure of the III prescription.

[0017] Figure 10 It is a schematic diagram of a local cross-sectional structure of an existing integrated component in one direction.

[0018] Figure 11 yes Figure 10 Schematic diagram of the large structure of the prescription in the middle II.

[0019] In the attached image:

[0020] 100. Electric pump; 11. Pump cover; 111. Inlet; 112. Outlet; 113. First contact part; 114. Second contact part; 115. Positioning part;

[0021] 12. Stator assembly; 121. Motor housing; 1211. First housing; 1212. Second housing; 1213. Outer wall portion; 1214. Inner groove; 1214a. Bottom; 1215. Flange portion; 1215a. Mounting surface; 1216. Limiting portion;

[0022] 122. Stator winding;

[0023] 14. Inner cavity; 141. Rotor cavity; 142. Impeller cavity;

[0024] 15. Rotating assembly; 151. Rotor assembly; 152. Impeller assembly;

[0025] 18. Shaft; 22. Circuit board assembly; 25. First assembly;

[0026] 28. Connecting part; 281. Head; 282. Tail; 283. First part; 284. Second part;

[0027] 29. Fixing part; 30. Welding part; 301. Recessed part; 302. Protruding part; 3021. Melting part; 31. Sealing part;

[0028] 200, Integrated component; 2001, Flow channel plate; 2001a, Inner wall portion; 2001b, Mounting cavity; 2001c, Abutment surface; 2001d, Base. Detailed Implementation

[0029] The specific embodiments are described below with reference to the accompanying drawings:

[0030] The electric pump in the following embodiments can provide flow power for the working medium of the automotive thermal management system. The working medium can be water or an aqueous solution, such as an aqueous solution containing 50% ethylene glycol, or other substances.

[0031] See Figures 1 to 9As shown, this application provides an electric pump 100, which includes a pump cover 11, a stator assembly 12, a rotating assembly 15, and a shaft 18. The stator assembly 12 includes a stator winding 122 and a motor housing 121. The stator winding 122 includes a stator core, an insulating frame, and a winding assembly. The pump cover 11 is sealed and fixedly connected to the stator assembly 12. It should be noted that the sealing and fixing here means that when the electric pump 100 is working, the working medium inside the electric pump 100 will not leak to the outside of the electric pump 100 through the joint surface between the pump cover 11 and the stator assembly 12. The shaft 18 is fixedly connected to the stator assembly 12. Specifically, the shaft 18 is injection molded and fixed to the motor housing 121. It can be understood that part of the shaft 18 is embedded in the motor housing 121. The electric pump 100 has an inner cavity 14, and the rotating assembly 15 is located in the inner cavity 14. The inner cavity 14 includes a rotor cavity 141 and an impeller cavity 142, which are connected. The inner cavity 14 allows the flow of a working medium. The rotating assembly 15 includes a rotor assembly 151 and an impeller assembly 152, with the rotor assembly 151 including a permanent magnet. At least a portion of the rotor assembly 151 is located in the rotor cavity 141, and the impeller assembly 152 is located in the impeller cavity 142. In one specific embodiment, at least a portion of the other end of the shaft 18 is located within the rotor cavity 141, at least a portion of the rotating assembly 15 is sleeved on the outer periphery of the shaft 18, and a portion of the shaft 18 is fixed to the motor housing 121. The rotating assembly 15 can rotate around the shaft 18. Alternatively, in other embodiments, the rotating assembly 15 and the shaft 18 are fixedly connected, and the shaft 18 rotates together with the rotating assembly 15. The electric pump 100 may also include a circuit board assembly 22, which is electrically connected to the stator assembly 12. In other embodiments, the electric pump 100 may not include the circuit board assembly 22; the circuit board assembly 22 is integrated into an external structure, thus facilitating miniaturization of the electric pump 100. In this embodiment, the electric pump 100 includes the circuit board assembly 22. The pump cover 11 has an inlet 111 and an outlet 112. The inlet 111 is for the working medium to flow into the electric pump 100, and the outlet 112 is for the working medium to flow out of the electric pump 100. When the electric pump 100 is working, it is connected to an external power source. By controlling the current in the stator winding 122, the excitation magnetic field generated by the stator winding 122 is controlled. Under the action of the excitation magnetic field, the rotating assembly 15 rotates around the shaft 18, so that the working medium entering the inner cavity 14 through the inlet 111 rotates with the rotating assembly 15. Under the action of centrifugal force, the working medium leaves the electric pump 100 through the outlet 112. It should be noted that the axial direction of the electric pump 100 mentioned below is the direction of the extension of the electric pump shaft, and the radial direction of the electric pump is the direction perpendicular to the axial direction of the electric pump.

[0032] As described above, the electric pump provides the flow power for the working medium of the automotive thermal management system. The automotive thermal management system includes the electric pump and components that mate with the electric pump, such as flow channels or reservoirs. The working medium typically flows through or is stored within these components. For ease of description below, the component mating with the electric pump 100' is defined as base 2000d. Please refer to... Figure 10 and Figure 11 As shown, the electric pump 100' is currently sealed to the base 2000d to reduce leakage of the working medium inside the base to the outside of the base through the sealed connection between the electric pump and the base. However, if there is leakage at the sealed connection between the pump cover 11' and the motor housing 121', the working medium of the electric pump will also leak to the base 2000d, posing a certain safety hazard to the entire thermal management system.

[0033] As one implementation method, please refer to Figures 1 to 9 As shown, the electric pump 100 includes a motor housing 121 and a pump cover 11. The motor housing 121 and the pump cover 11 are fixedly connected. The part where the motor housing 121 and the pump cover 11 mate is defined as the mating part 28. The mating part 28 includes a head 281 and a tail 282. The electric pump 100 includes an inner cavity 14. The head 281 is exposed in the inner cavity 14. The tail 282 forms part of the outer surface of the electric pump 100. The motor housing 121 includes an outer wall 1213. The outer wall 1213 is sealed to an outer inner wall 2001a. The electric pump 100 includes an inner groove 1214. Along the radial direction of the electric pump 100, the inner groove 1214 is recessed from the outer wall 1213 toward the central axis of the electric pump 100. Along the axial direction of the electric pump 100, the inner groove 1214 is away from the pump cover 11 relative to the tail 282. In this way, firstly, when mating with the outer inner wall portion 2001a, a sealing portion 31 can be provided within the inner groove 1214. Thus, if leakage occurs in the sealed connection between the pump cover 11 and the motor housing 121, the leaked working medium is sealed by the sealing portion 31 within the inner groove 1214. This helps reduce the leakage of the working medium to the outside of the entire thermal management system, thereby reducing potential safety hazards. Secondly, since the inner groove 1214 is recessed within the outer wall portion 1213 of the motor housing 121, it helps to reduce the radial diameter of the inner wall portion 2001a, thus facilitating the miniaturization of the entire thermal management system. Thirdly, the fixed connection between the pump cover 11 and the motor housing 121 only requires strength; the sealing requirements between the pump cover 11 and the motor housing 121 can be appropriately reduced, thus reducing the manufacturing difficulty of the electric pump 100.

[0034] As one implementation method, please refer to Figures 1 to 9As shown, the electric pump 100 includes a sealing part 31 located in an inner groove 1214. The inner groove 1214 includes a bottom 1214a. One side of the sealing part 31 abuts against the bottom 1214a, and the other side of the sealing part 31 abuts against the inner wall 2001a. This method of limiting the sealing part 31 facilitates the installation of the electric pump 100 and reduces the risk of the sealing part 31 detaching from the electric pump 100. Specifically, the sealing part 31 is an elastic structural component; more specifically, the sealing elastic component is a sealing ring. This method facilitates the standardization of the sealing part 31.

[0035] For a specific implementation method, please refer to Figures 3 to 8 As shown, the pump cover 11 includes a first contact portion 113, and the motor housing 121 includes a second contact portion 114. The first contact portion 113 and the second contact portion 114 are fixedly connected. The part where the first contact portion 113 and the second contact portion 114 are fixedly connected is defined as the fixing portion 29. Along the radial direction of the electric pump 100, the first contact portion 113 extends in the radial direction of the electric pump 100, and the second contact portion 114 extends in the radial direction of the electric pump 100. The first contact portion 113 and the second contact portion 114 are fixedly connected in the radial direction of the electric pump 100. 4. Fixed connection: Along the radial direction of the electric pump 100, the mating part 28 extends along the radial direction of the electric pump 100. The mating part 28 includes a first part 283 and a second part 284. The first part 283 is formed with the first contact part 113, and the second part 284 is formed with the second contact part 114. Projecting the first part 283 onto the second part 284 along the axial direction 18 of the electric pump 100, the projections of the first part 283, the second part 284, and the fixed part 29 at least partially overlap. This arrangement helps reduce the manufacturing difficulty of the electric pump 100.

[0036] There are various ways to fix the first contact portion 113 and the second contact portion 114, including but not limited to welding, bonding, snap-fitting, or fixing with screws or bolts. For a specific implementation method, please refer to [the relevant documentation / reference]. Figures 1 to 9 As shown, the first contact portion 113 and the second contact portion 114 are fixedly connected by a welding portion 30. Along the radial direction of the electric pump 100, the head 281 is located on one side of the welding portion 30, and the tail portion 282 is located on the other side of the welding portion 30. In this way, the welding portion 30 is disposed between the head 281 and the tail portion 282, which helps to reduce the overflow of the molten part of the welding portion 30 into the inner cavity 14 and / or flow to the outside of the electric pump 100. It should be noted that the welding methods include, but are not limited to, laser welding, rotary friction welding, ultrasonic welding, infrared welding, and hot plate welding.

[0037] As a specific implementation method, please refer to Figures 1 to 9As shown, the welding portion 30 includes a protrusion 302 and a recess 301. One of the protrusion 302 and the recess 301 is located on the pump cover 11, and the other of the protrusion 302 and the recess 301 is located on the motor housing 121. The protrusion 302 includes a molten portion 3021, which is located on the recess 301. The molten portion 3021 is fixedly connected to the wall portion corresponding to the recess 301. In this way, the impact of overflow material during welding of the pump cover 11 and the motor housing 121 on the seal is further reduced.

[0038] For a specific implementation method, please refer to Figures 1 to 9 As shown, a protrusion 302 is formed on the pump cover 11, protruding from the first contact portion 113. A recess 301 is formed on the motor housing 121, recessed within the second contact portion 114. The pump cover 11 includes a positioning portion 115, and the motor housing 121 includes a limiting portion 1216. The positioning portion 115 and the limiting portion 1216 are mutually limitingly engaged. At least a portion of the protrusion 302 is located in the recess 301, and the first contact portion 113 abuts against the second contact portion 114. This arrangement facilitates: firstly, the assembly of the electric pump 100; and secondly, the welding process between the pump cover 11 and the motor housing 121. Specifically, the limiting portion 1216 protrudes from the second contact portion 114, and the positioning portion 115 is recessed within the first contact portion 113.

[0039] As one implementation method, please refer to Figures 1 to 9 As shown, the electric pump 100 includes a stator winding 122, and the motor housing 121 is injection molded with the stator winding 122 as an insert. The electric pump 100 includes a rotor cavity 141, and the wall portion corresponding to the rotor cavity 141 is formed in the motor housing 121. In this way, it is beneficial to reduce the number of parts assembled in the electric pump 100, thereby simplifying the assembly steps of the electric pump 100. In one specific embodiment, the motor housing 121 includes a first housing 1211 and a second housing 1212, and the electric pump 100 includes a stator winding 122 and a shaft 18. The first housing 1211 is injection molded with at least the stator winding 122 as an insert, defining a first component 25, which includes the stator winding 122 and the first housing 1211. The second housing 1212 is injection molded with at least the first component 25 and the shaft 18 as inserts. An inner groove 1214 is formed in the second housing 1212. The pump cover 11 is sealed to the second housing 1212, and the connection between the pump cover 11 and the second housing 1212 is a mating part 28.

[0040] As one implementation method, please refer to Figures 1 to 9As shown, the motor housing 121 includes a flange portion 1215. Along the radial direction of the electric pump 100, the flange portion 1215 is located radially outside the outer wall portion 1213. The flange portion 1215 includes a mounting surface 1215a, which is fixedly connected to an external abutment surface 2001c. Further, the mounting surface 1215a and the abutment surface 2001c are welded or fixedly connected by a fastener.

[0041] This application also discloses an integrated component 200, please refer to... Figure 8 and Figure 9 As shown, the integrated component 200 includes a mounting cavity 2001b, and the wall portion corresponding to the mounting cavity 2001b includes an inner wall portion 2001a. The inner wall portion 2001a is sealed to an external electric pump 100. The electric pump 100 includes a motor housing 121 and a pump cover 11. The motor housing 121 and the pump cover 11 are fixedly connected. The part where the motor housing 121 and the pump cover 11 mate is defined as the mating part 28. The mating part 28 includes a head 281 and a tail 282. The electric pump 100 includes an inner cavity 14, the head 281, and the tail 282. Part 281 is exposed in the inner cavity 14, and the tail portion 282 forms part of the outer surface of the electric pump 100. The motor housing 121 includes an outer wall portion 1213, which is sealed to the inner wall portion 2001a. The electric pump 100 includes an inner groove 1214. Along the radial direction of the electric pump 100, the inner groove 1214 is recessed from the outer wall portion 1213 toward the central axis of the electric pump 100. Along the axial direction 18 of the electric pump 100, the inner groove 1214 is farther away from the pump cover 11 relative to the tail portion 282. In this way, firstly, when cooperating with the outer inner wall portion 2001a, a sealing portion 31 can be provided in the inner groove 1214. Thus, if there is leakage in the sealed connection between the pump cover 11 and the motor housing 121, the leaked working medium is sealed by the sealing portion 31 provided in the inner groove 1214. This helps to reduce the leakage of the working medium to the outside of the entire thermal management system, thereby reducing the safety hazards of the entire thermal management system. Secondly, since the inner groove 1214 is located on the radial outer side of the motor housing 121, it is beneficial to reduce the radial diameter of the inner wall portion 2001a, which in turn is beneficial to the miniaturization of the entire thermal management system.

[0042] This application also discloses an integrated component 200, please refer to... Figure 8 , Figure 9As shown, the integrated component 200 includes an electric pump 100 and a flow channel plate 2001. The flow channel plate 2001 includes a mounting cavity 2001b, and the wall portion corresponding to the mounting cavity 2001b includes an inner wall portion 2001a. The electric pump 100 is sealed to the flow channel plate 2001. The electric pump 100 includes a motor housing 121 and a pump cover 11. The motor housing 121 and the pump cover 11 are fixedly connected. The part where the motor housing 121 and the pump cover 11 mate is defined as the mating part 28. The mating part 28 includes a head 281 and a tail 282. The motor housing 121 includes an inner cavity 14, with a head 281 exposed within the inner cavity 14 and a tail 282 forming part of the outer surface of the electric pump 100. The motor housing 121 includes an outer wall portion 1213, which is sealed to an outer inner wall portion 2001a. The electric pump 100 includes an inner groove 1214. Along the radial direction of the electric pump 100, the inner groove 1214 is recessed from the outer wall portion 1213 towards the central axis of the electric pump 100. Along the axial direction of the electric pump 100, the inner groove 1214 is farther from the tail 282 than the pump cover 11. In this way, firstly, when engaging with the outer inner wall portion 2001a, a sealing portion 31 can be provided within the inner groove 1214. Thus, if leakage occurs in the sealed connection between the pump cover 11 and the motor housing 121, the leaked working medium is sealed by the sealing portion 31 within the inner groove 1214. This helps reduce the leakage of the working medium to the outside of the entire thermal management system, thereby reducing potential safety hazards associated with the entire thermal management system. Secondly, since the inner groove 1214 is located on the radial outer side of the motor housing 121, it is beneficial to reduce the radial diameter of the inner wall portion 2001a, which in turn is beneficial to the miniaturization of the entire thermal management system.

[0043] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications without departing from the inventive concept, and these modifications all fall within the protection scope of this invention.

Claims

1. An electric pump (100), characterized in that: The electric pump (100) includes a motor housing (121) and a pump cover (11). The motor housing (121) is fixedly connected to the pump cover (11). The part where the motor housing (121) and the pump cover (11) mate is defined as a mating part (28). The mating part (28) includes a head (281) and a tail (282). The electric pump (100) includes an inner cavity (14). The head (281) is exposed in the inner cavity (14), and the tail (282) forms part of the outer surface of the electric pump (100). The motor housing (121) includes an outer wall portion (1213), which is sealed to an outer inner wall portion (2001a). The electric pump (100) includes an inner groove (1214). Along the radial direction of the electric pump (100), the inner groove (1214) is recessed from the outer wall portion (1213) toward the central axis of the electric pump (100). Along the axial direction of the electric pump (100), the inner groove (1214) is away from the pump cover (11) relative to the tail portion (282).

2. The electric pump (100) according to claim 1, characterized in that: The electric pump (100) includes a sealing portion (31), at least a portion of which is located in the inner groove (1214), the inner groove (1214) including a bottom (1214a), one side of the sealing portion (31) abutting against the bottom (1214a), and the other side of the sealing portion (31) abutting against the inner wall portion (2001a).

3. The electric pump (100) according to claim 1, characterized in that: The pump cover (11) includes a first contact portion (113), and the motor housing (121) includes a second contact portion (114). The first contact portion (113) and the second contact portion (114) are fixedly connected. The part where the first contact portion (113) and the second contact portion (114) are fixedly connected is defined as the fixing portion (29). The first contact portion (113) extends along the radial direction of the electric pump (100), and the second contact portion (114) extends along the radial direction of the electric pump (100). The mating part (28) extends in the radial direction of the electric pump (100). The mating part (28) includes a first part (283) and a second part (284). The first part (283) is formed with the first contact part (113), and the second part (284) is formed with the second contact part (114). The first part (283) is projected onto the second part (284) in a forward direction. The projection of the first part (283), the projection of the second part (284), and the projection of the fixing part (29) at least partially overlap.

4. The electric pump (100) according to claim 2, characterized in that: The pump cover (11) includes a first contact portion (113), and the motor housing (121) includes a second contact portion (114). The first contact portion (113) and the second contact portion (114) are fixedly connected. The part where the first contact portion (113) and the second contact portion (114) are fixedly connected is defined as the fixing portion (29). The first contact portion (113) extends along the radial direction of the electric pump (100), and the second contact portion (114) extends along the radial direction of the electric pump (100). The mating part (28) extends in the radial direction of the electric pump (100). The mating part (28) includes a first part (283) and a second part (284). The first part (283) is formed with the first contact part (113), and the second part (284) is formed with the second contact part (114). The first part (283) is projected onto the second part (284) in a forward direction. The projection of the first part (283), the projection of the second part (284), and the projection of the fixing part (29) at least partially overlap.

5. The electric pump (100) according to claim 3, characterized in that: The first contact portion (113) and the second contact portion (114) are fixedly connected by a welding portion (30), the head (281) is located on one side of the welding portion (30), and the tail portion (282) is located on the other side of the welding portion (30).

6. The electric pump (100) according to claim 4, characterized in that: The first contact portion (113) and the second contact portion (114) are fixedly connected by a welding portion (30), the head (281) is located on one side of the welding portion (30), and the tail portion (282) is located on the other side of the welding portion (30).

7. The electric pump (100) according to claim 5, characterized in that: The welding part (30) includes a protrusion (302) and a recess (301). One of the protrusion (302) and the recess (301) is located on the pump cover (11), and the other of the protrusion (302) and the recess (301) is located on the motor housing (121). The protrusion (302) includes a molten part (3021), which is located on the recess (301). The molten part (3021) is fixedly connected to the wall portion corresponding to the recess (301).

8. The electric pump (100) according to claim 6, characterized in that: The welding part (30) includes a protrusion (302) and a recess (301). One of the protrusion (302) and the recess (301) is located on the pump cover (11), and the other of the protrusion (302) and the recess (301) is located on the motor housing (121). The protrusion (302) includes a molten part (3021), which is located on the recess (301). The molten part (3021) is fixedly connected to the wall portion corresponding to the recess (301).

9. The electric pump (100) according to claim 7 or 8, characterized in that: The protrusion (302) is formed on the pump cover (11) and protrudes from the first contact portion (113). The recess (301) is formed on the motor housing (121) and recessed within the second contact portion (114). The pump cover (11) includes a positioning portion (115), and the motor housing (121) includes a limiting portion (1216). The positioning portion (115) and the limiting portion (1216) are mutually limiting and engaged. At least a portion of the protrusion (302) is located in the recess (301), and the first contact portion (113) abuts against the second contact portion (114).

10. The electric pump (100) according to claim 9, characterized in that: The electric pump (100) includes a stator winding (122), and the motor housing (121) is injection molded with at least the stator winding (122) as an insert. The electric pump (100) includes a rotor cavity (141), and the wall portion corresponding to the rotor cavity (141) is formed in the motor housing (121).

11. The electric pump (100) according to any one of claims 1 to 8, characterized in that: The motor housing (121) includes a flange (1215) located radially outside the outer wall (1213). The flange (1215) includes a mounting surface (1215a) which is fixedly connected to an outer abutment surface (2001c).

12. An integrated component (200), characterized in that: The integrated component (200) includes a mounting cavity (2001b), and the wall portion corresponding to the mounting cavity (2001b) includes an inner wall portion (2001a). The inner wall portion (2001a) is sealed to an external electric pump (100). The electric pump (100) includes a motor housing (121) and a pump cover (11). The motor housing (121) is fixedly connected to the pump cover (11). The part where the motor housing (121) and the pump cover (11) mate relative to each other is defined as a mating part (28). The mating part (28) includes a head (281) and a tail (282). The electric pump (100) includes an inner cavity (14). 1) Exposed to the inner cavity (14), the tail portion (282) forms part of the outer surface of the electric pump (100), the motor housing (121) includes an outer wall portion (1213), the outer wall portion (1213) is sealed to the inner wall portion (2001a), the electric pump (100) includes an inner groove (1214), along the radial direction of the electric pump (100), the inner groove (1214) is recessed from the outer wall portion (1213) toward the central axis of the electric pump (100), along the axial direction of the electric pump (100), the inner groove (1214) is away from the pump cover (11) relative to the tail portion (282).

13. An integrated component (200), characterized in that: The integrated component (200) includes an electric pump (100) and a flow channel plate (2001). The flow channel plate (2001) includes a mounting cavity (2001b), and the wall portion corresponding to the mounting cavity (2001b) includes an inner wall portion (2001a). The electric pump (100) is sealed to the flow channel plate (2001). The electric pump (100) includes a motor housing (121) and a pump cover (11). The motor housing (121) is fixedly connected to the pump cover (11). The part where the motor housing (121) and the pump cover (11) mate relative to each other is defined as a mating part (28). The mating part (28) includes a head (281) and a tail (282). The electric pump (100) 0) includes an inner cavity (14), the head (281) is exposed in the inner cavity (14), the tail (282) forms part of the outer surface of the electric pump (100), the motor housing (121) includes an outer wall portion (1213), the outer wall portion (1213) is sealed to an outer inner wall portion (2001a), the electric pump (100) includes an inner groove (1214), along the radial direction of the electric pump (100), the inner groove (1214) is recessed from the outer wall portion toward the central axis of the electric pump (100), along the axial direction of the electric pump (100), the inner groove (1214) is away from the pump cover (11) relative to the tail (282).

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