Electric pump

Abstract

This application provides an electric pump, which includes a bottom cover assembly and a motor housing. The bottom cover assembly is fixedly connected to the motor housing. The bottom cover assembly includes a bottom shell and a conductive element. The bottom shell is injection molded with at least the conductive element as an insert. The bottom shell includes a base and a positioning portion. The base includes a first surface and a second surface, which are opposite to each other. The positioning portion protrudes from the second surface in a direction away from the second surface. The conductive element includes an external power connection portion, an injection-molded fixing portion, and an electrical connection portion. The injection-molded fixing portion connects the external power connection portion and the electrical connection portion. The injection-molded fixing portion is injection-molded and fixed to the bottom shell. The electrical connection portion protrudes from the second surface, and the external power connection portion protrudes from the first surface. Along the axial direction of the electric pump, the end surface of the positioning portion is farther away from the second surface relative to the end surface of the electrical connection portion. This arrangement helps to improve the reliability of the electrical connection of the conductive element.

Description

Technical Field

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

[0002] The electric pump includes a bottom housing assembly and a motor housing. The bottom housing assembly is welded and fixed to the motor housing. The bottom housing assembly includes a bottom cover and a conductive component. The conductive component is fixedly connected to the bottom cover. The conductive component is inserted and mated with components that require pre-fitting to achieve electrical connection. Currently, the conductive component has the problem of unreliable connection. Utility Model Content

[0003] The purpose of this application is to provide an electric pump that improves the connection reliability of conductive components.

[0004] To achieve the above objectives, one technical solution of this application is as follows: An electric pump, comprising a bottom cover assembly and a motor housing, the bottom cover assembly being fixedly connected to the motor housing, the bottom cover assembly comprising a bottom shell and a conductive element, the bottom shell being injection molded with at least the conductive element as an insert, the bottom shell comprising a base and a positioning portion, the base comprising a first surface and a second surface, the first surface and the second surface being disposed opposite to each other, the positioning portion being disposed protruding from the second surface in a direction away from the second surface, the conductive element comprising an external power connection portion, an injection molding fixing portion and an electrical connection portion, the injection molding fixing portion connecting the external power connection portion and the electrical connection portion, the injection molding fixing portion being injection molded and fixed to the bottom shell, the electrical connection portion being disposed protruding from the second surface, the external power connection portion being disposed protruding from the first surface, and along the axial direction of the electric pump, the end surface of the positioning portion being away from the second surface relative to the end surface of the electrical connection portion.

[0005] In this technical solution, along the axial direction of the electric pump, the end surface of the positioning part is farther away from the end surface of the electrical connection part from the second surface. During the assembly of the bottom cover assembly, the end of the positioning part can be pre-positioned with the hand component to guide the bottom cover assembly. This helps to reduce the situation where the conductive component is misaligned during the assembly process, thereby improving the reliability of the conductive component connection. Attached Figure Description

[0006] Figure 1 This is a three-dimensional schematic diagram of the electric pump technical solution of this application.

[0007] Figure 2 yes Figure 1 A schematic diagram of the exploded structure in the first embodiment of the electric pump.

[0008] Figure 3 yes Figure 1 A schematic diagram of the structure along section XX in the first embodiment of the electric pump.

[0009] Figure 4 yes Figure 3 Schematic diagram of the YY cross-section structure along the middle.

[0010] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of I.

[0011] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure at point I before welding.

[0012] Figure 7 yes Figure 1 A three-dimensional schematic diagram of the assembly structure of the bottom cover assembly and the circuit board assembly in one direction.

[0013] Figure 8 yes Figure 1 A three-dimensional schematic diagram of the assembly structure of the mid-bottom cover assembly and the circuit board assembly in another direction.

[0014] Figure 9 yes Figure 8 Schematic diagram of the AA section structure along the middle.

[0015] Figure 10 This is a three-dimensional structural diagram of the bottom cover assembly in one direction.

[0016] Figure 11 This is a three-dimensional structural diagram of the bottom cover assembly in another direction.

[0017] Figure 12 yes Figure 11 A schematic diagram of the structure viewed from the front along direction D.

[0018] Figure 13 yes Figure 1 A three-dimensional structural diagram of the middle stator assembly in one direction.

[0019] Figure 14 This is a three-dimensional structural diagram of the circuit board assembly and stator assembly in one direction after assembly.

[0020] In the attached image:

[0021] 100. Electric pump;

[0022] 11. Volute; 111. Inlet; 112. Outlet; 113. Volute cavity;

[0023] 12. Stator assembly; 121. Motor housing; 1211. First housing; 1212. Second housing; 1212b. Bottom; 1212c. Cylindrical section;

[0024] 1213. Peripheral side; 1214. Shell bottom; 1215. First cavity; 1216. Support part; 1217. Second welded rib;

[0025] 122. Stator winding; 1221. Stator core; 1222. Insulation frame; 1223. Winding;

[0026] 14. Inner cavity; 141. Rotor cavity; 142. Impeller cavity;

[0027] 15. Rotating assembly; 151. Rotor assembly; 152. Impeller assembly;

[0028] 16. Bottom cover assembly; 161. Bottom shell; 1611. Base; 1611a. First surface; 1611b. Second surface;

[0029] 1612, Positioning part; 1612a, End surface of the positioning part; 1612b, Body part; 1612c, Limiting part; 162, Conductive component; 1621, Power connection part; 1622, Injection molding fixing part;

[0030] 1623, Electrical connection portion; 1623a, End surface of electrical connection portion; 1623b, Main part; 1623c, Fisheye portion; 1623d, Electrical connection segment; 1623e, First segment; 1623f, Second segment; 163, First welding rib; 164, First retaining rib;

[0031] 17. Circuit board assembly; 171. Electronic components; 172. Substrate; 1721. Connecting hole; 1722. Mating hole; 1723. Positioning hole; 1724. Pin hole;

[0032] 18. Shaft; 19. Heat dissipation unit; 20. Pin insertion unit; 21. First connection point;

[0033] 101. The centerline of the electric pump. Detailed Implementation

[0034] The specific embodiments are described below with reference to the accompanying drawings:

[0035] 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.

[0036] See Figures 1 to 14As shown, this application provides an electric pump 100, which includes a volute 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 1221, an insulating frame 1222, and windings 1223. It should be noted that the volute 11 can be a separate component. Specifically, the volute 11 is sealed and fixedly connected to the stator assembly 12. This sealing and fixing means that when the electric pump 100 is operating, the working medium inside the electric pump 100 will not leak to the outside of the electric pump 100 through the mating surface between the volute 11 and the stator assembly 12. Alternatively, the volute 11 can be formed in an external structure, which facilitates the miniaturization design of the electric pump 100. 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 is understood that a portion of the shaft 18 is embedded within the motor housing 121. The electric pump 100 has at least a partial inner cavity 14. Specifically, when the electric pump 100 includes a volute 11, the electric pump 100 includes an inner cavity 14; as another embodiment, when the electric pump 100 does not include a volute 11, the electric pump 100 includes a partial inner cavity 14. It is understood that the inner cavity 14 is formed after the electric pump 100 is assembled with externally mating components. The rotating assembly 15 is located within the inner cavity 14, which includes a rotor cavity 141 and an impeller cavity 142, and the rotor cavity 141 and impeller cavity 142 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, and the rotor assembly 151 includes 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 part of the other end of the shaft 18 is located within the rotor cavity 141, at least part of the rotating assembly 15 is sleeved on the outer periphery of the shaft 18, and part 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 22, which is electrically connected to the stator assembly 12. In other embodiments, the electric pump 100 may not include a circuit board; the circuit board is integrated into an external structure, which facilitates miniaturization of the electric pump 100. In this embodiment, the electric pump 100 includes a circuit board, and the stator assembly is electrically connected to the circuit board via pins.The volute 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 is the direction in which the shaft of the electric pump extends, the radial direction of the electric pump is the direction perpendicular to the axial direction of the electric pump, the circumferential direction of the electric pump is the direction of rotation around the axial direction of the electric pump, and the centerline of the electric pump is the centerline of the shaft.

[0037] As one implementation method, please refer to Figures 1 to 14 As shown, the electric pump 100 includes a stator winding 122. The motor housing 121 is injection molded with at least the stator winding 122 as an insert. The motor housing 121 includes a first housing 1211 and a second housing 1212. The first housing 1211 is formed with at least the stator winding 122 as an insert. In one specific embodiment, the first housing 1211 is injection molded with at least the stator winding 122 and the pin portion 20 as inserts. A first component is defined, which includes the first housing 1211, the stator winding 122, and the pin portion 20. The second housing 1212 is injection molded with at least the first component and the shaft 18 as inserts. The wall portion corresponding to the rotor cavity 141 includes a bottom 1212b and a cylindrical portion 1212c. The bottom 1212b is formed in the second housing 1212. The second housing 1212 does not completely cover the first component. The pin portion 20 is located radially outside the bottom 1212b, and part of the pin portion 20 is not covered by the second housing 1212. The wall portion corresponding to the first mounting cavity 1212a includes a cylindrical portion formed in the motor housing. Specifically, the cylindrical portion 1212c is formed in the second housing 1212, protruding from the bottom 1212b and connected to the bottom 1212b. The electric pump 100 includes a rotor cavity 141 and an impeller cavity 142. The wall portion corresponding to the rotor cavity 141 is formed in the second housing 1212, and the wall portion corresponding to the impeller cavity 142 includes a volute 11 and a portion of the second housing 1212.

[0038] As one implementation method, please refer to Figures 1 to 14As shown, the electric pump 100 includes a bottom cover assembly 16 and a motor housing 121. The bottom cover assembly 16 is fixedly connected to the motor housing 121. The bottom cover assembly 16 includes a bottom shell 161 and a conductive element 162. The bottom shell 161 is injection molded with at least the conductive element 162 as an insert. The shell includes a base 1611 and a positioning portion. The base 1611 includes a first surface 1611a and a second surface 1611b. The first surface 1611a and the second surface 1611b are disposed opposite to each other. The positioning portion protrudes from the second surface 1611b in a direction away from the second surface 1611b. The conductive element 162 includes an external power connection portion 1621, an injection-molded fixing portion 1622, and an electrical connection portion 1623. The injection-molded fixing portion 1622 is connected to an external power source. The connecting part 1621 is connected to the electrical connecting part 1623, and the injection molding fixing part 1622 is injection molded and fixed to the bottom shell 161. The electrical connecting part 1623 is provided to protrude from the second surface 1611b, and the external power supply connecting part 1621 is provided to protrude from the first surface 1611a. Along the axial direction of the electric pump 100, the end surface 1612a of the positioning part is far away from the second surface 1611b relative to the end surface 1623a of the electrical connecting part. In this way, during the assembly of the bottom cover assembly 16, the end of the positioning part can be pre-positioned with the other part to guide the bottom shell 161 assembly. This helps to reduce the possibility of the conductive part 162 being misaligned during the assembly process, thereby improving the reliability of the connection of the conductive part 162.

[0039] As one implementation method, please refer to Figures 1 to 14 As shown, the positioning part 1612 includes at least two parts. Along the radial direction of the electric pump 100, the positioning part 1612 is located radially outside the conductive member 162. The center line 101 of the electric pump 100 and the positioning part 1612 are projected onto the plane where the second surface 1611b is located. The line connecting the projection of the center line of one positioning part 1612 and the projection of the center line 101 of the electric pump 100 is the first line segment 1623e, and the line connecting the projection of the center line of the other positioning part 1612 and the projection of the center line of the electric pump 100 is the second line segment 1623f. The minimum angle between the first line segment 1623e and the second line segment 1623f is greater than 90°. Along the radial direction of the electric pump 100, the conductive member 162 is close to the edge of the bottom shell 161 relative to the center of the bottom shell 161. This method increases the distance between the two positioning parts 1612, thereby improving the positioning accuracy between the bottom cover assembly 16 and the motor housing 121. This also helps ensure that the conductive element 162 can be smoothly inserted into the opposing component, which in this embodiment is the circuit board assembly 17. Furthermore, this improves the reliability of the connection between the conductive element 162 and the circuit board assembly 17. It should be noted that the center of the bottom cover is the centerline of the electric pump shaft.

[0040] As one implementation method, please refer to Figures 3 to 14 As shown, the positioning part 1612 includes a body part 1612b and a limiting part 1612c. The limiting part 1612c and the body part 1612b are an integral structural component. The limiting part 1612c protrudes from the end surface of the body part 1612b. Along the axial direction of the electric pump 100, the end surface of the limiting part 1612c is farther away from the second surface 1611b relative to the end surface 1623a of the electrical connection part. The electric pump 100 includes a circuit board assembly 17, which includes a substrate 172. The substrate 172 includes a connection hole 1721, which is provided through the substrate 172 along its thickness direction. At least a portion of the limiting part 1612c is located in the connection hole 1721. The substrate 172 includes a mating hole 1722, and at least a portion of the electrical connection part 1623 is located in the mating hole 1722. This arrangement helps to reduce the axial length of the electric pump 100, thereby laying a foundation for the miniaturization of the electric pump 100 in the radial direction.

[0041] As one implementation method, please refer to Figures 3 to 12 As shown, the electrical connection portion 1623 includes a main portion 1623b and a fisheye portion 1623c. The fisheye portion 1623c and the main portion 1623b are integral structural components. The main portion 1623b connects the fisheye portion 1623c to the injection molding fixing portion 1622. At least a portion of the fisheye portion 1623c is located in the mating hole 1722. The position where the fisheye portion 1623c is electrically connected to the mating hole 1722 is defined as the electrical connection segment 1623d. Along the axial direction of the electric pump 100, the minimum distance between the end surface of the main portion 1612b and the electrical connection segment 1623d is less than the thickness of the substrate 172. In this way, the end surface of the main body can control the mounting position of the bottom shell 161 assembly along the axial direction of the electric pump 100, which helps to reduce the insertion depth of the pin part 20 and the circuit board assembly 17. It can be understood that this helps to ensure the mating length of the electrical connection section 1623d and the mating hole 1722 along the axial direction of the electric pump 100, and thus helps to ensure the reliability of the electrical connection of the conductive component 162.

[0042] As one implementation method, please refer to Figures 3 to 14As shown, the electric pump 100 includes a dry chamber 19, and the circuit board assembly 17 is located in the dry chamber 19. The wall of the dry chamber 19 includes a part of the bottom shell 161 and a part of the motor housing 121. The bottom shell 161 and the motor housing 121 are welded and fixed. The fixed connection between the bottom shell 161 and the motor housing 121 is defined as the first connection point 21. Along the axial direction of the electric pump 100, the first connection point 21 is closer to the base 1611 of the circuit board assembly 17. In this way, the circuit board assembly 17 is away from the welding position between the bottom cover assembly 16 and the motor housing 121 along the axial direction of the electric pump 100, which helps to reduce the impact of the heat generated during welding on the circuit board assembly 17, and thus helps to improve the service life of the circuit board assembly 17.

[0043] As one implementation method, please refer to Figures 3 to 14 As shown, the bottom cover assembly 16 is welded to the motor housing 121. The welding methods include, but are not limited to, laser welding, infrared welding, rotary friction welding, and ultrasonic welding. In one specific embodiment, the bottom cover assembly 161 and the motor housing 121 are fixedly connected by infrared welding.

[0044] As one implementation method, please refer to Figures 3 to 14 As shown, the motor housing 121 includes a peripheral portion 1213 and a bottom portion 1214. The peripheral portion 1213 is connected and fixed to the bottom portion 1214. The peripheral portion 1213 protrudes along the bottom portion 1214. The motor housing 121 has a first cavity 1215. The wall portion corresponding to the first cavity 1215 includes the peripheral portion 1213 and the bottom portion 1214. The circuit board assembly 17 is located in the first cavity 1215. The electric pump 100 includes a support portion 1216, which protrudes from the bottom portion 1214 away from the bottom portion 1214. The substrate 172 includes a positioning hole 1723, which penetrates the thickness of the substrate 172. At least a portion of the support portion 1216 is located in the positioning hole 1723. This arrangement helps to improve the installation accuracy between the circuit board assembly 17 and the motor housing 121, and consequently, the installation accuracy between the conductive component 162 and the circuit board.

[0045] As one implementation method, please refer to Figures 3 to 14As shown, the support portion 1216 includes multiple portions, which are spaced apart along the circumferential direction of the bottom of the housing 1214. The electric pump 100 includes a pin portion 20, which is fixedly connected to the bottom of the housing 1214. A portion of the pin portion 20 is located in the first cavity 1215. The substrate 172 includes a pin hole 1724, which is through-hole along the thickness direction of the substrate 172. At least a portion of the pin portion 20 is located in the pin hole 1724 to achieve electrical connection between the pin portion 20 and the circuit board assembly 17. The number of pin portions 20 matches the number of support portions 1216. This method helps to improve the support strength of the circuit board assembly 17. During the assembly of the bottom housing 161 and the motor housing 121, the deformation of the circuit board assembly 17 is reduced during the mating process of the positioning portion and the circuit board assembly 17. This helps to ensure that the conductive component 162 can be smoothly inserted into the mating hole 1722 of the substrate 172, and improves the reliability of the electrical connection of the conductive component 162.

[0046] As one implementation method, please refer to Figures 1 to 14 As shown, the bottom shell 161 and the motor housing 121 are welded together. The electric pump 100 includes a first welding rib 163 and a second welding rib 1217. The welding structure is the weld melt of the first welding rib 163 and the second welding rib 1217. One of the first welding rib 163 and the second welding rib 1217 is formed in the bottom shell 161 assembly, and the other of the first welding rib 163 and the second welding rib 1217 is formed in the motor housing 121. In this way, the heat generated during welding can be quickly transferred to the positions of the first welding rib 163 and the second welding rib 1217, thereby shortening the heat transfer time between the first welding rib 163 and the second welding rib 1217, allowing the first welding rib 163 and the second welding rib 1217 to melt quickly. This helps to shorten the welding time of the first welding rib 163 and the second welding rib 1217, and thus helps to reduce the welding time between the bottom cover assembly 16 and the motor housing 121, laying a foundation for reducing the processing time of the electric pump 100.

[0047] As one implementation method, please refer to Figures 1 to 14As shown, a first welding rib 163 is formed on the bottom shell 161 assembly, and a second welding rib 1217 is formed on the motor housing 121. The first welding rib 163 protrudes from the second surface and is located radially outside the conductive element 162. The first welding rib 163 is arranged around the circumference of the electric pump 100. The bottom shell 161 includes a first baffle rib 164, which protrudes from the second surface away from it. The first baffle rib 164 is located radially outside the first welding rib 163 and is arranged around the circumference of the electric pump 100. This arrangement helps to reduce the amount of slag generated by the welding of the first welding rib 163 and the second welding rib 1217 from falling onto the outside of the electric pump 100.

[0048] As one implementation method, please refer to Figures 1 to 14As shown, the positioning part 1612 includes at least two parts. Along the radial direction of the electric pump 100, the positioning part 1612 is located radially outside the conductive member 162. Projecting the center line 101 of the electric pump 100 and the positioning part 1612 onto the plane containing the second surface 1611b, the line connecting the projection of the center line of one positioning part 1612 and the projection of the center line 101 of the electric pump 100 is the first line segment 1623e, and the line connecting the projection of the center line of the other positioning part 1612 and the projection of the center line of the electric pump 100 is the second line segment 1623f. The minimum angle D between the first line segment 1623e and the second line segment 1623f is greater than 90°. Along the radial direction of the electric pump 100, the conductive member 162 is positioned relative to the bottom shell 161. The center is near the edge of the bottom shell 161. The positioning part 1612 includes a body part 1612b and a limiting part 1612c. The limiting part 1612c and the body part 1612b are an integral structural component. The limiting part 1612c protrudes from the end surface of the body part 1612b. Along the axial direction of the electric pump 100, the end surface of the limiting part 1612c is farther away from the second surface 1611b relative to the end surface 1623a of the electrical connection part. The electric pump 100 includes a circuit board assembly 17. The circuit board assembly 17 includes a substrate 172. The substrate 172 includes a connection hole 1721. The connection hole 1721 is provided through the substrate 172 along the thickness direction of the substrate 172. At least part of the limiting part 1612c is located in the connection hole 1721. The substrate 172 includes a mounting part 1612c. The mating hole 1722 has at least a portion of the electrical connection portion 1623 located within it. The electrical connection portion 1623 includes a main body 1623b and a fisheye portion 1623c. The fisheye portion 1623c and the main body 1623b are integral structural components. The main body 1623b connects the fisheye portion 1623c to the injection molding fixing portion 1622. At least a portion of the fisheye portion 1623c is located within the mating hole 1722. The position where the fisheye portion 1623c is electrically connected to the mating hole 1722 is defined as the electrical connection segment 1623d. Along the axial direction of the electric pump 100, the minimum distance between the end surface of the main body 1612b and the electrical connection segment 1623d is less than the thickness of the substrate 172. The electric pump 100 includes a dry chamber 19, and the circuit board assembly 17 is located within the dry chamber 19. The wall portion corresponding to 9 includes a portion of the bottom shell 161 and a portion of the motor housing 121. The bottom shell 161 and the motor housing 121 are welded and fixed. The point where the bottom shell 161 and the motor housing 121 are fixedly connected is defined as the first connection point 21. Along the axial direction of the electric pump 100, the first connection point 21 is closer to the base 1611 relative to the circuit board assembly 17. The motor housing 121 includes a peripheral side portion 1213 and a bottom portion 1214. The peripheral side portion 1213 is connected and fixed to the bottom portion 1214. The peripheral side portion 1213 protrudes along the bottom portion 1214. The motor housing 121 has a first cavity 1215. The wall portion corresponding to the first cavity 1215 includes the peripheral side portion 1213 and the bottom portion 1214. The circuit board assembly 17 is located in the first cavity 1215.The electric pump 100 includes a support portion 1216, which protrudes from the bottom of the housing 1214 in a direction away from the bottom of the housing 1214. The substrate 172 includes a positioning hole 1723, which penetrates the thickness of the substrate 172. At least a portion of the support portion 1216 is located in the positioning hole 1723. Multiple support portions 1216 are spaced apart along the circumferential direction of the bottom of the housing 1214. The electric pump 100 also includes a pin portion 20. The pin portion 20 is fixedly connected to the bottom of the housing 1214. A portion of the pin portion 20 is located in the first cavity 1215. The substrate 172 includes a pin hole 1724, which extends through the substrate 172 along its thickness direction. At least a portion of the pin portion 20 is located in the pin hole 1724 to achieve electrical connection between the pin portion 20 and the circuit board assembly 17. The number of pin portions 20 matches the number of support portions 1216. The bottom housing 161 and the motor housing 121 are welded together using a welding structure. The electric pump 100 includes a first welding rib 163 and a second welding rib 1217. The welding structure is the weld melt of the first welding rib 163 and the second welding rib 1217. One of the first welding rib 163 and the second welding rib 1217 is formed in the bottom shell 161 assembly, and the other of the first welding rib 163 and the second welding rib 1217 is formed in the motor housing 121. The first welding rib 163 protrudes from the second surface and is located radially outside the conductive element 162. The first welding rib 163 is arranged around the circumference of the electric pump 100. The bottom shell 161 includes a first baffle rib 164, which protrudes from the second surface away from the second surface. The first baffle rib 164 is located radially outside the first welding rib 163 and is arranged around the circumference of the electric pump 100.

[0049] 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 bottom cover assembly (16) and a motor housing (121). The bottom cover assembly (16) is fixedly connected to the motor housing (121). The bottom cover assembly (16) includes a bottom shell (161) and a conductive element (162). The bottom shell (161) is injection molded with at least the conductive element (162) as an insert. The bottom shell (161) includes a base (1611) and a positioning part (1612). The base (1611) includes a first surface (1611a) and a second surface (1611b). The first surface (1611a) and the second surface (1611b) are disposed opposite to each other. The positioning part (1612) extends from the second surface (1611b) away from the second surface (1611b). The conductive component (162) is convex in the direction of the electric pump (100). It includes an external power connection part (1621), an injection molding fixing part (1622), and an electrical connection part (1623). The injection molding fixing part (1622) connects the external power connection part (1621) and the electrical connection part (1623). The injection molding fixing part (1622) is injection molded and fixed to the bottom shell (161). The electrical connection part (1623) is convex on the second surface. The external power connection part (1621) is convex on the first surface (1611a). Along the axial direction of the electric pump (100), the end surface (1612a) of the positioning part is away from the second surface (1611b) relative to the end surface (1623a) of the electrical connection part.

2. The electric pump (100) according to claim 1, characterized in that: The positioning part (1612) includes at least two parts. Along the radial direction of the electric pump (100), the positioning part (1612) is located radially outside the conductive element (162). The center line (101) of the electric pump (100) and the positioning part (1612) are projected onto the plane where the second surface (1611b) is located. The line connecting the projection of the center line of one positioning part (1612) and the projection of the center line (101) of the electric pump (100) is a first line segment (1623e), and the line connecting the projection of the center line of the other positioning part (1612) and the projection of the center line of the electric pump (100) is a second line segment (1623f). The minimum angle between the first line segment and the second line segment is greater than 90°. Along the radial direction of the electric pump (100), the conductive element (162) is close to the edge of the bottom shell (161) relative to the center of the bottom shell (161).

3. The electric pump (100) according to claim 1, characterized in that: The positioning part (1612) includes a body part (1612b) and a limiting part (1612c). The limiting part (1612c) and the body part (1612b) are an integral structural component. The limiting part (1612c) protrudes from the end surface of the body part (1612b). Along the axial direction of the electric pump (100), the end surface of the limiting part (1612c) is farther away from the second surface (1611b) relative to the end surface (1623a) of the electrical connection part. The electric pump (100) includes a circuit board assembly (17), the circuit board assembly (17) includes a substrate (172), the substrate (172) includes a connection hole (1721), the connection hole (1721) is disposed through the substrate (172) along the thickness direction, at least a portion of the limiting portion (1612c) is located in the connection hole (1721), the substrate (172) includes a mating hole (1722), at least a portion of the electrical connection portion (1623) is located in the mating hole (1722).

4. The electric pump (100) according to claim 2, characterized in that: The positioning part (1612) includes a body part (1612b) and a limiting part (1612c). The limiting part (1612c) and the body part (1612b) are an integral structural component. The limiting part (1612c) protrudes from the end surface of the body part (1612b). Along the axial direction of the electric pump (100), the end surface of the limiting part (1612c) is farther away from the second surface (1611b) relative to the end surface (1623a) of the electrical connection part. The electric pump (100) includes a circuit board assembly (17), the circuit board assembly (17) includes a substrate (172), the substrate (172) includes a connection hole (1721), the connection hole (1721) is disposed through the substrate (172) along the thickness direction, at least a portion of the limiting portion (1612c) is located in the connection hole (1721), the substrate (172) includes a mating hole (1722), at least a portion of the electrical connection portion (1623) is located in the mating hole (1722).

5. The electric pump (100) according to claim 3, characterized in that: The electrical connection portion (1623) includes a main body (1623b) and a fisheye portion (1623c). The fisheye portion (1623c) and the main body (1623b) are integral structural components. The main body (1623b) connects the fisheye portion (1623c) and the injection molding fixing portion (1622). At least a portion of the fisheye portion (1623c) is located in the mating hole (1722). The position where the fisheye portion (1623c) is electrically connected to the mating hole (1722) is defined as the electrical connection segment (1623d). Along the axial direction of the electric pump (100), the minimum distance between the end surface of the main body portion (1612b) and the electrical connection segment (1623d) is less than the thickness of the substrate (172).

6. The electric pump (100) according to claim 4, characterized in that: The electrical connection portion (1623) includes a main body (1623b) and a fisheye portion (1623c). The fisheye portion (1623c) and the main body (1623b) are integral structural components. The main body (1623b) connects the fisheye portion (1623c) and the injection molding fixing portion (1622). At least a portion of the fisheye portion (1623c) is located in the mating hole (1722). The position where the fisheye portion (1623c) is electrically connected to the mating hole (1722) is defined as the electrical connection segment (1623d). Along the axial direction of the electric pump (100), the minimum distance between the end surface of the main body portion (1612b) and the electrical connection segment (1623d) is less than the thickness of the substrate (172).

7. The electric pump (100) according to claim 3, characterized in that: The electric pump (100) includes a dry chamber (19), and the circuit board assembly (17) is located in the dry chamber (19). The wall of the dry chamber (19) includes a portion of the bottom shell (161) and a portion of the motor housing (121). The bottom shell (161) and the motor housing (121) are welded and fixed. The fixed connection point between the bottom shell (161) and the motor housing (121) is defined as the first connection point (21). Along the axial direction of the electric pump (100), the first connection point (21) is closer to the base (1611) relative to the circuit board assembly (17).

8. The electric pump (100) according to claim 4, characterized in that: The electric pump (100) includes a dry chamber (19), and the circuit board assembly (17) is located in the dry chamber (19). The wall of the dry chamber (19) includes a portion of the bottom shell (161) and a portion of the motor housing (121). The bottom shell (161) and the motor housing (121) are welded and fixed. The fixed connection point between the bottom shell (161) and the motor housing (121) is defined as the first connection point (21). Along the axial direction of the electric pump (100), the first connection point (21) is closer to the base (1611) relative to the circuit board assembly (17).

9. The electric pump (100) according to claim 5, characterized in that: The electric pump (100) includes a dry chamber (19), and the circuit board assembly (17) is located in the dry chamber (19). The wall of the dry chamber (19) includes a portion of the bottom shell (161) and a portion of the motor housing (121). The bottom shell (161) and the motor housing (121) are welded and fixed. The fixed connection point between the bottom shell (161) and the motor housing (121) is defined as the first connection point (21). Along the axial direction of the electric pump (100), the first connection point (21) is closer to the base (1611) relative to the circuit board assembly (17).

10. The electric pump (100) according to claim 6, characterized in that: The electric pump (100) includes a dry chamber (19), and the circuit board assembly (17) is located in the dry chamber (19). The wall of the dry chamber (19) includes a portion of the bottom shell (161) and a portion of the motor housing (121). The bottom shell (161) and the motor housing (121) are welded and fixed. The fixed connection point between the bottom shell (161) and the motor housing (121) is defined as the first connection point (21). Along the axial direction of the electric pump (100), the first connection point (21) is closer to the base (1611) relative to the circuit board assembly (17).

11. The electric pump (100) according to claim 7, characterized in that: The motor housing (121) includes a peripheral side portion (1213) and a bottom portion (1214). The peripheral side portion (1213) is connected and fixed to the bottom portion (1214). The peripheral side portion (1213) protrudes along the bottom portion (1214). The motor housing (121) has a first cavity (1215). The wall portion corresponding to the first cavity (1215) includes the peripheral side portion (1213) and the bottom portion (1214). The circuit board assembly... (17) Located in the first cavity (1215), the electric pump (100) includes a support (1216), the support (1216) protruding from the bottom of the shell (1214) in a direction away from the bottom of the shell (1214), the substrate (172) includes a positioning hole (1723), the positioning hole (1723) is provided through the thickness of the substrate (172), and at least part of the support (1216) is located in the positioning hole (1723).

12. The electric pump (100) according to claim 8, characterized in that: The motor housing (121) includes a peripheral side portion (1213) and a bottom portion (1214). The peripheral side portion (1213) is connected and fixed to the bottom portion (1214). The peripheral side portion (1213) protrudes along the bottom portion (1214). The motor housing (121) has a first cavity (1215). The wall portion corresponding to the first cavity (1215) includes the peripheral side portion (1213) and the bottom portion (1214). The circuit board assembly... (17) Located in the first cavity (1215), the electric pump (100) includes a support (1216), the support (1216) protruding from the bottom of the shell (1214) in a direction away from the bottom of the shell (1214), the substrate (172) includes a positioning hole (1723), the positioning hole (1723) is provided through the thickness of the substrate (172), and at least part of the support (1216) is located in the positioning hole (1723).

13. The electric pump (100) according to claim 9, characterized in that: The motor housing (121) includes a peripheral side portion (1213) and a bottom portion (1214). The peripheral side portion (1213) is connected and fixed to the bottom portion (1214). The peripheral side portion (1213) protrudes along the bottom portion (1214). The motor housing (121) has a first cavity (1215). The wall portion corresponding to the first cavity (1215) includes the peripheral side portion (1213) and the bottom portion (1214). The circuit board assembly... (17) Located in the first cavity (1215), the electric pump (100) includes a support (1216), the support (1216) protruding from the bottom of the shell (1214) in a direction away from the bottom of the shell (1214), the substrate (172) includes a positioning hole (1723), the positioning hole (1723) is provided through the thickness of the substrate (172), and at least part of the support (1216) is located in the positioning hole (1723).

14. The electric pump (100) according to claim 10, characterized in that: The motor housing (121) includes a peripheral side portion (1213) and a bottom portion (1214). The peripheral side portion (1213) is connected and fixed to the bottom portion (1214). The peripheral side portion (1213) protrudes along the bottom portion (1214). The motor housing (121) has a first cavity (1215). The wall portion corresponding to the first cavity (1215) includes the peripheral side portion (1213) and the bottom portion (1214). The circuit board assembly... (17) Located in the first cavity (1215), the electric pump (100) includes a support (1216), the support (1216) protruding from the bottom of the shell (1214) in a direction away from the bottom of the shell (1214), the substrate (172) includes a positioning hole (1723), the positioning hole (1723) is provided through the thickness of the substrate (172), and at least part of the support (1216) is located in the positioning hole (1723).

15. The electric pump (100) according to any one of claims 7 to 14, characterized in that: The electric pump (100) includes a support portion (1216), and the support portion (1216) includes a plurality of such support portions (1216) which are spaced apart along the circumferential direction of the bottom of the housing (1214). The electric pump (100) includes a pin portion (20), which is fixedly connected to the bottom of the housing (1214). A portion of the pin portion (20) is located in the first cavity (1215). The substrate (172) includes a pin hole (1724), which is through-hole along the thickness direction of the substrate (172). At least a portion of the pin portion (20) is located in the pin hole (1724) to achieve electrical connection between the pin portion (20) and the circuit board assembly (17). The number of pin portions (20) matches the number of support portions (1216).

16. The electric pump (100) according to claim 15, characterized in that: The bottom shell (161) and the motor housing (121) are welded together by a welding structure. The electric pump (100) includes a first welding rib (163) and a second welding rib (1217). The welding structure is the weld melt of the first welding rib (163) and the second welding rib (1217). One of the first welding rib (163) and the second welding rib (1217) is formed in the bottom shell (161) assembly, and the other of the first welding rib (163) and the second welding rib (1217) is formed in the motor housing (121).

17. The electric pump (100) according to claim 16, characterized in that: The first welding rib (163) is formed on the bottom shell (161) assembly, and the second welding rib (1217) is formed on the motor housing (121). The first welding rib (163) protrudes from the second surface and is located radially outside the conductive element (162). The first welding rib (163) is arranged around the circumference of the electric pump (100). The bottom shell (161) includes a first baffle rib (164). The first baffle rib (164) protrudes from the second surface away from the second surface and is arranged radially outside the first welding rib (163). The first baffle rib (164) is arranged around the circumference of the electric pump (100).

18. The electric pump (100) according to claim 1, characterized in that: The positioning part (1612) includes at least two parts. Along the radial direction of the electric pump (100), the positioning part (1612) is located radially outside the conductive element (162). Projecting the center line (101) of the electric pump (100) and the positioning part (1612) onto the plane containing the second surface (1611b), the line connecting the projection of the center line of one positioning part (1612) and the projection of the center line (101) of the electric pump (100) is a first line segment (1623e), and the line connecting the projection of the center line of the other positioning part (1612) and the projection of the center line of the electric pump (100) is a second line segment (1623f). The minimum angle between the segment and the second segment is greater than 90°. Along the radial direction of the electric pump (100), the conductive element (162) is close to the edge of the bottom shell (161) relative to the center of the bottom shell (161). The positioning part (1612) includes a body part (1612b) and a limiting part (1612c). The limiting part (1612c) and the body part (1612b) are an integral structural component. The limiting part (1612c) protrudes from the end surface of the body part (1612b). Along the axial direction of the electric pump (100), the end surface of the limiting part (1612c) is far away from the end surface (1623a) of the electrical connection part. The second surface (1611b), the electric pump (100) includes a circuit board assembly (17), the circuit board assembly (17) includes a substrate (172), the substrate (172) includes a connection hole (1721), the connection hole (1721) is disposed through the thickness direction of the substrate (172), at least a portion of the limiting portion (1612c) is located in the connection hole (1721), the substrate (172) includes a mating hole (1722), at least a portion of the electrical connection portion (1623) is located in the mating hole (1722), the electrical connection portion (1623) includes a main portion (1623b) and a fisheye portion (1623c), the fisheye portion (1623c) and the The main body (1623b) is an integral structural component, connecting the fisheye portion (1623c) and the injection molding fixing portion (1622). At least a portion of the fisheye portion (1623c) is located in the mating hole (1722). The position where the fisheye portion (1623c) and the mating hole (1722) are electrically connected is defined as the electrical connection segment (1623d). Along the axial direction of the electric pump (100), the minimum distance between the end surface of the main body (1612b) and the electrical connection segment (1623d) is less than the thickness of the substrate (172). The electric pump (100) includes a dry chamber (19), and the circuit board assembly (17) is located in the dry chamber (19).The wall portion corresponding to the dry chamber (19) includes a portion of the bottom shell (161) and a portion of the motor housing (121). The bottom shell (161) and the motor housing (121) are welded and fixed. The fixed connection point between the bottom shell (161) and the motor housing (121) is defined as the first connection point (21). Along the axial direction of the electric pump (100), the first connection point (21) is close to the base (1611) relative to the circuit board assembly (17). The motor housing (121) includes a peripheral side portion (1213) and a bottom portion (1214). The peripheral side portion (1213) is connected and fixed to the bottom portion (1214). The peripheral side portion (1213) protrudes along the bottom portion (1214). The motor housing (121) has a first cavity (1215), the wall of which includes a peripheral side (1213) and a bottom (1214). The circuit board assembly (17) is located in the first cavity (1215). The electric pump (100) includes a support (1216) that protrudes from the bottom (1214) away from it. The substrate (172) includes a positioning hole (1723) that penetrates the thickness of the substrate (172). At least a portion of the support (1216) is located in the positioning hole (1723). The electric pump (100) includes multiple support portions (1216) spaced apart along the circumferential direction of the bottom of the shell (1214). The electric pump (100) includes pin portions (20) fixedly connected to the bottom of the shell (1214), with a portion of the pin portions (20) located in the first cavity (1215). The substrate (172) includes pin holes (1724) extending through the substrate (172) along its thickness direction. At least a portion of the pin portions (20) is located in the pin holes (1724) to achieve electrical connection between the pin portions (20) and the circuit board assembly (17). The number of pin portions (20) matches the number of support portions (1216). The bottom shell (161) and the motor housing (121) are welded together. The electric pump (100) includes a first welding rib (163) and a second welding rib (1217). The welding structure is the weld melt of the first welding rib (163) and the second welding rib (1217). One of the first welding rib (163) and the second welding rib (1217) is formed in the bottom shell (161) assembly, and the other of the first welding rib (163) and the second welding rib (1217) is formed in the motor housing (121).The first welding rib (163) protrudes from the second surface and is located radially outside the conductive element (162). The first welding rib (163) is arranged in a circle around the circumference of the electric pump (100). The bottom shell (161) includes a first baffle rib (164), which protrudes from the second surface away from it. The first baffle rib (164) is located radially outside the first welding rib (163) and is arranged in a circle around the circumference of the electric pump (100).

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