Electric pump and thermal management system

Abstract

The utility model relates to an electric pump and thermal management system, including stator subassembly and shell subassembly, stator subassembly is located in the first cavity of shell subassembly, stator subassembly includes stator core, shell subassembly includes metal pump shell, electric pump includes insulating material layer, insulating material layer sets up between the inner wall of metal pump shell and the outer wall of stator core, and the metal part of metal pump shell and stator core all are in contact with the insulating material layer and set up, so that the structure of stator core, insulating material layer and metal pump shell can constitute a filter common mode noise parasitic capacitance, is favorable to reduce common mode noise, and then can satisfy electric pump and thermal management system relatively higher electromagnetic compatibility requirement.

Description

Technical Field

[0001] This application relates to the field of fluid control, specifically to electric pumps and thermal management systems for automobiles. Background Technology

[0002] The relevant electric pump includes a stator assembly and a housing. The stator core of the stator assembly is in contact with the metal part of the housing, and the stator assembly can be grounded to the vehicle through the metal part of the housing. However, during the operation of the electric pump, this grounding structure can cause relatively large common-mode noise. Utility Model Content

[0003] The purpose of this application is to provide an electric pump and thermal management system that helps reduce common-mode noise.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An electric pump includes a stator assembly and a housing assembly. The stator assembly is located in a first cavity of the housing assembly. The stator assembly includes a stator core. The housing assembly includes a metal pump housing. The electric pump includes an insulating material layer disposed between the outer wall of the stator core and the inner wall of the metal pump housing. The metal portions of the metal pump housing and the stator core are both in contact with the insulating material layer.

[0006] In the electric pump provided in this application, an insulating material layer is disposed between the outer wall of the stator core and the inner wall of the metal pump casing. The metal parts of the metal pump casing and the stator core are in contact with the insulating material layer, so that the structure of the stator core, the insulating material layer and the metal pump casing is equivalent to a capacitor that can filter common-mode noise, which is beneficial to reducing common-mode noise and thus can meet the relatively higher electromagnetic compatibility requirements of the electric pump.

[0007] A thermal management system includes an electric drive assembly and an electric pump. The electric drive assembly includes a housing. The electric pump includes a stator assembly and a housing assembly. The stator assembly is located in a first cavity of the housing assembly. The stator assembly includes a stator core. The housing assembly includes a metal pump housing. The metal pump housing is in contact with a metal portion of the housing. The electric pump includes an insulating material layer. The insulating material layer is disposed between the outer wall of the stator core and the inner wall of the metal pump housing. The metal portions of both the metal pump housing and the stator core are in contact with the insulating material layer.

[0008] In a thermal management system provided in this application, an insulating material layer is disposed between the outer wall of the stator core and the inner wall of the metal pump casing. The metal parts of the metal pump casing and the stator core are in contact with the insulating material layer, so that the structure of the stator core, the insulating material layer and the metal pump casing is equivalent to a capacitor that can filter common-mode noise, which is beneficial to reducing common-mode noise and thus can meet the relatively higher electromagnetic compatibility requirements of the thermal management system. Attached Figure Description

[0009] Figure 1 A three-dimensional structural schematic diagram of an electric pump provided in the first embodiment of this application;

[0010] Figure 2 for Figure 1 One of the schematic diagrams of the cross-sectional structure of a medium-sized electric pump;

[0011] Figure 3 for Figure 2 A magnified view of the structure at point "A" in the middle;

[0012] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the electric pump (Part 2);

[0013] Figure 5 for Figure 2 A magnified view of the structure at point "B" in the middle;

[0014] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure of the electric pump (Part 3);

[0015] Figure 7 for Figure 2 A three-dimensional structural diagram of the middle stator assembly;

[0016] Figure 8 for Figure 2 A three-dimensional structural diagram of the rotor assembly;

[0017] Figure 9 for Figure 2 A cross-sectional structural diagram of a medium-sized metal pump casing;

[0018] Figure 10 A schematic diagram of the framework structure of a thermal management system provided in an embodiment of this application;

[0019] Figure 11 This is a partial cross-sectional structural diagram of an electric pump provided in the second embodiment of this application;

[0020] Figure 12 This is a partial cross-sectional structural diagram of an electric pump provided in the third embodiment of this application;

[0021] In the diagram: 10-Thermal Management System, 100-Electric Pump, 200-Electric Drive Assembly, 110-Housing Assembly, 120-Stator Assembly, 130-Rotor Assembly, 140-Circuit Board Assembly, 150-Insulating Material Layer, 111-Metal Pump Housing, 112-First Housing Cover, 113-Second Housing Cover, 114-First Cavity, 115-Second Cavity, 1111-Small Diameter Section, 1112-Stepped Section, 1113-First Connecting Path, 1114-Large Diameter Section, 1111a-First Inner Peripheral Wall, 1112a-Stepped Bottom Surface, 1114a-Guide Surface, 1131-First Opening, 1132-Second Opening, 121-Stator Core, 122-Coil Frame, 123 - Coil, 124- Winding pin, 125- Grounding pin, 1211- Cylinder body, 1212- Neck, 1213- Boot, 1211a- First outer peripheral wall, 1211b- Lower end wall, 131- Gear assembly, 132- Magnetic rotor, 133- Hollow shaft, 1311- First gear, 1312- Second gear, 1313- Meshing section, 1314- Liquid suction area, 1315- Liquid discharge area, 1331- Second connecting path, 141- Substrate, 142- External pin, 151- First insulating material layer, 152- Second insulating material layer, 210- Housing, 220- Motor, 211- Drive cavity, 212- Liquid inlet, 213- Liquid outlet. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments are further described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0023] The following is combined with Figures 1 to 12 This application provides an embodiment of an electric pump 100, which includes a housing assembly 110, a stator assembly 120, a rotor assembly 130, a circuit board assembly 140, and an insulating material layer 150. The insulating material layer 150 is in the form of a thin film. The stator assembly 120 includes a stator core 121, a coil frame 122, a coil 123, a winding pin 124, and a grounding pin 125. The rotor assembly 130 includes a magnetic rotor assembly 130, a hollow shaft 133, and a gear assembly 131, which includes a first gear 1311 and a second gear 1312. The circuit board assembly 140 includes a substrate 141 and an external pin 142. The housing assembly 110 includes a metal pump housing 111, a first housing cover 112, and a second housing cover 113.

[0024] like Figure 2 and Figure 3In the first embodiment shown, the stator assembly 120 is located in the first cavity 114 of the housing assembly 110. The stator assembly 120 includes a stator core 121, and the housing assembly 110 includes a metal pump housing 111. At least a portion of the insulating material layer 150 is located between the stator core 121 and the metal pump housing 111, such that the insulating material layer 150 separates the metal portion of the stator core 121 from the metal pump housing 111, thereby preventing the stator core 121 from contacting the metal pump housing 111. Both the metal portion of the metal pump housing 111 and the metal portion of the stator core 121 are in contact with the insulating material layer 150, which is located on the outer wall of the stator core 121 and the inner wall of the metal pump housing 111. During the operation of the electric pump 100, the structure of the stator core 121, the insulating material layer 150, and the metal pump housing 111 can act as a parasitic capacitor that can filter common-mode noise, which helps to reduce common-mode noise and thus meets the relatively higher electromagnetic compatibility requirements of the electric pump 100.

[0025] like Figure 2 and Figure 3 In the first embodiment shown, the metal pump housing 111 can be made of metal, such as aluminum alloy, brass, or steel, so that the electric pump 100 can be grounded through the metal pump housing 111.

[0026] like Figure 2 and Figure 3 In the first embodiment, the entire stator core 121 is made of metal, which may be silicon steel sheet.

[0027] In this embodiment, the metal pump housing 111 and / or stator core 121 have an insulating material layer 150. The insulating material layer 150 is a part of the corresponding metal pump housing 111 and / or stator core 121. The insulating material layer 150 is integrally formed on the corresponding metal pump housing 111 and / or stator core 121. The material used to make the insulating material layer 150 includes polyetheretherketone or polyphenyl sulfide. The insulating material layer is formed by coating or injection molding.

[0028] like Figure 2 and Figure 3 In the first embodiment shown, the insulating material layer 150 includes a first insulating material layer 151, which is coated and formed on the outer wall of the stator core 121. The bonding strength between the first insulating material layer 151 and the outer wall of the stator core 121 is relatively high. The outer wall of the first insulating material layer 151 abuts against the inner wall of the metal pump housing 111. During the assembly process, the integral structure of the insulating material layer 150 and the stator core 121 can be press-fitted into the metal pump housing 111, and the outer wall of the insulating material layer 150 abuts against the inner wall of the metal pump housing 111, which helps to simplify the assembly of the electric pump 100.

[0029] like Figure 11In the second embodiment shown, the insulating material layer 150 includes a second insulating material layer 152, which is coated and formed on the inner wall of the metal pump housing 111, and the inner wall of the second insulating material layer 152 abuts against the outer wall of the stator core 121.

[0030] like Figure 12 In the third embodiment shown, the insulating material layer 150 includes a first insulating material layer 151 and a second insulating material layer 152. The first insulating material layer 151 is coated and formed on the outer wall of the stator core 121, and the second insulating material layer 152 is coated and formed on the inner wall of the metal pump housing 111. The outer wall of the first insulating material layer 151 and the inner wall of the second insulating material layer 152 abut against each other.

[0031] like Figure 2 and Figure 3 In the first embodiment shown, the material used to form the insulating material layer 150 includes polyetheretherketone (PEEK), which has heat resistance, corrosion resistance, abrasion resistance, oil resistance, and high dielectric properties. This is beneficial for improving the service life and stability of the insulating material layer 150 and also for reducing dielectric loss.

[0032] like Figure 2 and Figure 3 In the first embodiment shown, the coating of the first insulating material layer 151 includes spraying. During the coating process, a coating containing polyetheretherketone is sprayed onto the outer wall of the stator core 121 and then cured to form a solid first insulating material layer 151 that is attached to the outer wall of the stator core 121.

[0033] In some embodiments not shown in the figures, the first insulating material layer 151 may be made of polyphenyl sulfide, and the insulating material layer 150 may be injection molded.

[0034] In some embodiments not shown in the figures, the insulating material layer 150 includes a first insulating material layer 151. The first insulating material layer 151 can be injection molded onto the outer wall of the stator core 121, and the outer wall of the first insulating material layer 151 abuts against the inner wall of the metal pump housing 111. More specifically, the first insulating material layer 151 and the coil frame 122 of the stator assembly 120 can be an integral structure. The first insulating material layer 151 and the coil frame 122 are injection molded with the stator core 121 as an insert, so that the first insulating material layer 151, the coil frame 122 and the stator core 121 form a whole. The bonding strength between the first insulating material layer 151 and the stator core 121 is relatively high. Moreover, the first insulating material layer 151, the coil frame 122 and the stator core 121 are press-fitted as a whole into the metal pump housing 111, which also helps to simplify the assembly of the electric pump 100.

[0035] In some embodiments not shown in the figure, the insulating material layer 150 includes a first insulating material layer 152, and the second insulating coating 152 can be injection molded on the inner wall of the metal pump housing 111. The inner wall of the second insulating material layer 152 abuts against the outer wall of the stator core 121.

[0036] In some embodiments not shown in the figures, the insulating material layer 150 includes a first insulating material layer 151 and a second insulating material layer 152. The first insulating material layer 151 can be injection molded on the outer wall of the stator core 121, and the second insulating material layer 152 can be injection molded on the inner wall of the metal pump housing 111. The outer wall of the first insulating material layer 151 and the inner wall of the second insulating material layer 152 abut against each other.

[0037] In some embodiments not shown in the figures, the insulating material layer 150, the stator core 121, and the metal pump housing 111 are separate structures. The insulating material layer 150 is a cylindrical shape with openings at both ends. The inner peripheral wall of the insulating material layer 150 is in contact with the outer peripheral wall of the stator core 121, and the outer peripheral wall of the insulating material layer 150 is in contact with the inner peripheral wall of the metal pump housing 111. During the assembly of the insulating material layer 150, the stator core 121, and the metal pump housing 111, the insulating material layer 150 is pre-fitted onto the first outer peripheral wall 1211a of the stator core 121, and then the stator assembly 120 and the insulating material layer 150 are embedded in the first cavity 114 of the housing assembly 110; or, during the assembly of the insulating material layer 150, the stator core 121, and the metal pump housing 111, the insulating material layer 150 is pre-fitted onto the first inner peripheral wall 1111a of the metal pump housing 111 of the housing assembly 110, and then the stator assembly 120 and the insulating material layer 150 are embedded in the first cavity 114 of the housing assembly 110.

[0038] like Figure 2 and Figure 3 , Figure 11 , Figure 12 In the first to third embodiments shown, the stator core 121 includes a cylindrical portion 1211, which is cylindrical in shape. The outer wall of the cylindrical portion 1211 includes a first outer peripheral wall 1211a and a lower end wall 1211b. A portion of the insulating material layer 150 is located between the first outer peripheral wall 1211a and the inner wall of the metal pump housing 111, and a portion of the insulating material layer 150 is located between the lower end wall 1211b and the inner wall of the metal pump housing 111. Both the first outer peripheral wall 1211a and the lower end wall 1211b are in contact with the insulating material layer 150, so that the insulating material layer 150 fully covers the cylindrical portion 1211.

[0039] like Figure 2 and Figure 3 , Figure 11 , Figure 12In the first to third embodiments shown, the metal pump housing 111 includes a stepped portion 1112, which protrudes from the first inner peripheral wall 1111a of the metal pump housing 111. The stepped portion 1112 can be an annular protrusion or a block. The stepped portion 1112 includes a stepped bottom surface 1112a, which faces the lower end wall 1211b, so that the stator assembly 120 can be subjected to the axial force of the stepped bottom surface 1112a of the stepped portion 1112. The insulating material layer 150 is positioned between the first outer peripheral wall 1211a and the first inner peripheral wall 1111a, and between the lower end wall 1211b and the bottom surface of the step 1112a. Both the first outer peripheral wall 1211a and the bottom surface of the step 1112a are in contact with the insulating material layer 150. This arrangement ensures that the insulating material layer 150 fully separates the outer wall of the stator core 121 from the inner wall of the metal pump housing 111, and they are tightly joined together.

[0040] like Figure 3 and Figure 5 In the first embodiment shown, the metal pump housing 111 includes a small-diameter section 1111, and the first inner peripheral wall 1111a is the inner peripheral wall of the small-diameter section 1111. The small-diameter section 1111 is cylindrical and surrounds the outer peripheral wall of the stator core 121. The small-diameter section 1111 and the stator core 121 are interference-fitted by the insulating material layer 150, which makes the fit between the stator core 121, the insulating material layer 150 and the small-diameter section 1111 tighter. This helps to reduce the gap between the insulating material layer 150 and the first inner peripheral wall 1111a, making the capacitance value of the parasitic capacitance more stable, and thus making the common-mode noise filtering of the electric pump 100 more stable.

[0041] like Figure 2 and Figure 3 In the first embodiment shown, the outer diameter of the cylindrical part 1211 is defined as d1, the inner diameter of the small diameter section 1111 is defined as d2, the thickness of the insulating material layer is defined as D, and d2-d1=D1.

[0042] like Figure 3 and Figure 5In the first embodiment shown, the metal pump housing 111 includes a large-diameter section 1113, which is located on the axially upper side of the small-diameter section 1111 away from the step portion 1112. The inner diameter of the large-diameter section 1113 is larger than the inner diameter of the small-diameter section 1111. The metal pump housing 111 includes a guide surface 1113a, which is located between the inner peripheral wall of the large-diameter section 1113 and the first inner peripheral wall 1111a. The guide surface 1113a may be a conical surface. The guide surface 1113a is tapered from the inner peripheral wall of the large diameter section 1113 toward the first inner peripheral wall 1111a. During the assembly of the electric pump 100, the guide surface 1113a guides the installation of the stator assembly 110, the insulating material layer 150 and the housing assembly 110. This arrangement facilitates the pressing of the stator core 111 and the insulating material layer 150 into the metal pump housing 111, and also helps to reduce the problem of damage to the insulating material layer 150 during the pressing process.

[0043] Let S be the surface area of ​​the insulating material layer 150, and C be the capacitance of the parasitic capacitance. The capacitance can then be determined using C = ΣS / 4ΠKD. It should be noted that Σ is the dielectric constant of the insulating material layer 150, K is the electrostatic constant, and Π is pi. The surface area of ​​the insulating material layer 150 includes the surface areas of the first outer peripheral wall 1211a and the lower end wall 1211b. This arrangement results in a relatively large surface area of ​​the insulating material layer 150 and a relatively large parasitic capacitance, which is beneficial for arranging a relatively larger parasitic capacitance in a small-sized electric pump 100 and also helps improve the filtering effect on common-mode noise.

[0044] The thickness of the insulating material layer 150 can be considered as the vertical distance between the first outer peripheral wall 1211a of the stator core 121 and the first inner peripheral wall 1111a of the metal pump housing 111, which is 0.05mm≤D≤0.2mm. Under the insulating material layer 150 within this thickness range, the formed parasitic capacitance can filter the noise frequency band of the electric pump and the thermal management system that resonates, which is beneficial to reducing common mode noise and thus improving the communication quality of the electric pump, the thermal management system using the electric pump, and the vehicle.

[0045] Preferably, the insulation material layer 150 has a thickness of 0.08mm≤D≤0.12mm. This thickness allows the formed parasitic capacitance to more accurately filter the noise frequency band where the electric pump and thermal management system resonate. In addition, it can also take into account the grounding effect of the electric pump 100 through the metal pump housing 111. This is more conducive to improving the communication quality of the electric pump, the thermal management system using the electric pump, and the vehicle.

[0046] like Figure 3 and Figure 5In the first embodiment shown, D=0.08mm. Under the insulation material layer 150 of this thickness, the electric pump takes into account both the grounding effect and the anti-common-mode interference effect, and the communication quality of the electric pump, the thermal management system using the electric pump, and the vehicle is relatively better.

[0047] like Figure 2 and Figure 3 In the first embodiment shown, the coil frame 122 is first injection molded with the stator core 121 as an insert, and then the insulating material layer 150 is coated on the coil frame 122 and the stator core 121. Part of the insulating material layer 122 can be coated on the outer peripheral wall of the coil frame 122. This arrangement ensures that the outer surface of the stator core 121 exposed relative to the coil frame 122 is fully covered by the insulating material layer 150.

[0048] In some embodiments not shown in the figure, the insulating material layer 150 may be first coated and formed on the outer surface of the stator core 121, and the coil frame 122 may be injection molded with the insulating material layer 150 and the stator core 121 as inserts.

[0049] like Figure 3 and Figure 5 In the first embodiment shown, the stator core 121 is formed by stacked silicon steel sheets. At least two silicon steel sheets are stacked along the axial direction of the electric pump 100. An insulating material layer 150 is formed on the outer peripheral wall of the stacked silicon steel sheets. The thickness of the silicon steel sheets is defined as T1, the number of silicon steel sheets is defined as a, and the axial height of the first inner peripheral wall 1111a is defined as T2, where T1*a≥T2, so that the first inner peripheral wall 1111a is in full contact with the insulating material layer 150 on the outer peripheral wall of the silicon steel sheets.

[0050] like Figure 2 In the first embodiment shown, the electric pump 100 includes a circuit board assembly 140, at least a portion of which is located in the first cavity 114. The stator assembly 120 includes a grounding pin 125, which is electrically connected to the stator core 121 and the circuit board assembly 140. At least a portion of the circuit board assembly 140 is located on the axial side of the stator assembly away from the stepped surface 1112a. The circuit board assembly 140 is in a limiting fit with the stator assembly 120 and the housing assembly 110. This arrangement helps to reduce the shaking of the insulating material layer 150 relative to the metal pump housing 111, thereby improving the stability of the parasitic capacitance.

[0051] like Figure 2 In the first embodiment shown, the ground layer of the substrate 141 of the circuit board assembly 140 is electrically connected to the grounding pin 125, and the grounding pin 125 is also engaged with the groove of the coil frame 122, so that the interference signal of the circuit board assembly 140 can be conducted to the metal pump housing 111 through the grounding pin 125 and the stator core 121.

[0052] like Figure 2 and Figure 6 In the first embodiment shown, the rotor assembly 130 includes a gear assembly 131, and the housing assembly 110 has a second cavity 115. The gear assembly 131 is located in the second cavity 115 and includes a meshing section 1313. The gear assembly 131 has a liquid suction area 1314 and a liquid discharge area 1315, which are located on both sides of the meshing section 1313. The housing assembly 110 has a first connection and a first opening 1131. The first connection 1113 communicates with the first cavity 114 and the liquid suction area 1314, and the first opening 1131 communicates with the liquid discharge area 1315. An insulating material layer 150 is located in the first cavity 114. The first cavity 114, the first connection 1113, and the liquid suction area 1314 are sequentially connected, the first opening 1131 communicates with the liquid discharge area 1315, and the insulating material layer 150 is located in the first cavity 114. During the operation of the electric pump 100, the coolant is located in the first chamber 114 and the second chamber 115. The gear assembly 131 can drive the coolant to pass through the first chamber 114, the first connecting passage 1113, the suction area 1314, the meshing section 1313, the discharge area 1315 and the first opening 1131 in sequence. This allows the coolant to carry away the heat of the insulating material layer 150, which is beneficial for the insulating material layer 150 to maintain a suitable working temperature, thereby improving the stability of the parasitic capacitance.

[0053] like Figure 2 and Figure 6 In the first embodiment shown, the gear assembly 131 includes a first gear 1311 and a second gear 1312, with the first gear 1311 and the second gear 1312 meshing internally.

[0054] like Figure 2 In the first embodiment shown, the rotor assembly 130 includes a magnetic rotor 132 capable of driving a gear assembly 131. The magnetic rotor 132 is located in a first cavity 114. The stator assembly 120 is arranged around the magnetic rotor 132. At least a portion of the first connecting passage 1113 is located on the axial side of the magnetic rotor 132 near the gear assembly 131, and at least a portion of the insulating material layer 150 is located on the radial side of the stator core 121. The first connecting passage 1113 generally faces the magnetic rotor assembly 130, and most of the insulating material layer 150 is located on the radially outer side of the stator core 121. This allows the first connecting passage 1113 to not face the insulating material layer 150, which helps reduce the impact of the coolant on the insulating material layer 150, and thus further improves the stability of the parasitic capacitance.

[0055] like Figure 2In the first embodiment shown, the rotor assembly 130 further includes a hollow shaft 133, which is in a limiting engagement with the magnetic rotor 132 and the first gear 1311, allowing the magnetic rotor 132 and the first gear 1311 to rotate synchronously. The housing assembly 110 includes a second opening 1132, which communicates with the liquid suction area 1314. The hollow shaft 133 has a second connecting passage 1331, which communicates with the first cavity 114 and the second opening 1132. During the operation of the electric pump 100, the gear assembly 131 can drive the coolant to pass sequentially through the second opening 1132, the meshing section 1313, the drain area 1315, and the first opening 1131. It can also drive the coolant to pass sequentially through the second connecting passage 1331, the first cavity 114, the first connecting passage 1113, the liquid suction area 1314, the meshing section 1313, the drain area 1315, and the first opening 1131.

[0056] like Figure 2 and Figure 4 In the first embodiment shown, the stator assembly 120 includes a coil 123, the enameled wire of which is wound around a coil frame 122. The stator core 121 includes a neck 1212 and a shoe 1213. A first cylindrical section 1211 surrounds the neck 1212 and the shoe 1213. The shoe 1213 and the first cylindrical section 1211 are respectively connected to both ends of the neck 1212. The neck 1212 provides support for the injection molding of the coil frame 122 and the winding of the coil 123. The stator assembly 120 also includes a winding pin 124, which engages with the coil frame 122 and is electrically connected to the coil 123 and the circuit board assembly 140.

[0057] like Figure 2 In the first embodiment shown, the coil frame 122 includes a first mounting part and a second mounting part. The first mounting part is located on the axial upper side of the stator core 121 and is correspondingly arranged with the large diameter section. The first mounting part is in a limiting fit with the winding pin 124, the grounding pin 125, and the enameled wire of the coil 123. A partial insulating material layer 150 is formed on the outer peripheral wall of the first mounting part. The second mounting part is located on the axial lower side of the stator core 121 and is in a limiting fit with the small diameter section. Specifically, the radial protrusion of the outer peripheral wall of the second mounting part is in a limiting fit with the radial recess of the inner peripheral wall of the second mounting part, and a partial insulating material layer 150 is formed on the outer peripheral wall of the second mounting part.

[0058] In addition, the following combination Figures 1 to 10 The thermal management system 10 provided in this application embodiment includes an electric drive assembly 200 and the aforementioned electric pump 100. The electric drive assembly 200 includes an electric motor 220 and a housing 210.

[0059] like Figure 10In the first embodiment shown, the housing 210 has a drive chamber 211, a liquid inlet 212, and a liquid outlet 213. At least a portion of the motor 220 is located in the drive chamber 211. The output of the motor 220 can be connected to and drive a vehicle. The drive chamber 211 communicates with the liquid inlet 212 and the liquid outlet 213. The housing assembly 110 has a first opening 1131 and a second opening 1132. The first opening 1131 communicates with the liquid inlet 212, and the second opening 1132 communicates with the liquid outlet 213. The metal pump housing 111 is in contact with the metal portion of the housing 210. During the operation of the electric pump 100, the coolant can circulate through the drive chamber 211, the liquid outlet 213, the second opening 1132, the electric pump 100, the first opening 1131, the liquid inlet 212, and the drive chamber 211. This arrangement allows the coolant to carry away excess heat from the electric drive assembly 200 and the electric pump 100, which is beneficial for the thermal management system 10 to maintain operation at a suitable temperature.

[0060] like Figure 10 In the first embodiment shown, the metal pump housing 111 includes two mounting feet, which are fixedly connected to the metal part of the housing 210, thereby making the metal pump housing 111 contact the metal part of the housing 210.

[0061] like Figure 10 In the first embodiment shown, the housing 210 can be made of metal, such as aluminum alloy, and the metal frame of the vehicle can be in contact with the metal part of the housing 210 so that the thermal management system can be grounded through the metal frame of the vehicle.

[0062] like Figure 10 In the first embodiment shown, the condensate for cooling the electric drive assembly 200 can be cooling oil, and the thermal management system 10 can also include a heat exchanger that can be connected to the coolant circulation for heat exchange of the coolant.

[0063] Furthermore, the thermal management system 10 provided in this application is applied to a vehicle, which may be a new energy vehicle. The vehicle includes the aforementioned thermal management system 10. Under the insulating material layer 150 with a thickness of 0.08mm≤D≤0.12mm, the formed parasitic capacitance can more accurately filter the electric pump 100, the thermal management system 10, and the noise frequency band in which the vehicle resonates. Moreover, it can also take into account the grounding effect of the electric pump 100 through the metal pump housing 111, which is more conducive to improving the communication quality of the vehicle.

[0064] The above-described embodiments are merely examples of several implementations of this application, and while the descriptions are quite detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications without departing from the concept of this utility model, and these modifications all fall within the protection scope of this utility model.

Claims

1. An electric pump characterized by comprising: The device includes a stator assembly (120) and a housing assembly (110). The stator assembly (120) is located in the first cavity (114) of the housing assembly (110). The stator assembly (120) includes a stator core (121). The housing assembly (110) includes a metal pump housing (111). The electric pump (100) includes an insulating material layer (150). The insulating material layer (150) is disposed between the outer wall of the stator core (121) and the inner wall of the metal pump housing (111). The metal portions of the metal pump housing (111) and the stator core (121) are both in contact with the insulating material layer (150).

2. The electric pump according to claim 1, characterized in that, The metal pump housing (111) and / or the stator core (121) have the insulating material layer (150), the material of which includes polyether ether ketone or polyphenyl sulfide, and the insulating material layer (150) is formed by coating or injection molding.

3. The electric pump according to claim 1, characterized in that, The insulating material layer (150), the stator core (121), and the metal pump housing (111) are separate structures. The insulating material layer (150) is cylindrical. The inner wall of the insulating material layer (150) is in contact with the outer wall of the stator core (121), and the outer wall of the insulating material layer (150) is in contact with the inner wall of the metal pump housing (111). The insulating material layer (150) is pre-fitted onto the stator core (121), and then the stator assembly (120) and the insulating material layer (150) are embedded in the housing assembly (110). Alternatively, the insulating material layer (150) is pre-embedded in the metal pump housing (111), and then the stator assembly (120) is embedded in the insulating material layer (150) and the housing assembly (110).

4. The electric pump according to any one of claims 1 to 3, characterized in that, The stator core (121) includes a cylindrical part (1211). The outer wall of the cylindrical part (1211) includes a first outer peripheral wall (1211a) and a lower end wall (1211b). Part of the insulating material layer (150) is located between the first outer peripheral wall (1211a) and the inner wall of the metal pump housing (111), and part of the insulating material layer (150) is located between the lower end wall (1211b) and the inner wall of the metal pump housing (111). The first outer peripheral wall (1211a) and the lower end wall (1211b) are both in contact with the insulating material layer (150).

5. The electric pump according to claim 4, characterized in that, The metal pump housing (111) includes a stepped portion (1112), which protrudes from the first inner peripheral wall (1111a) of the metal pump housing (111). The stepped portion (1112) includes a step bottom surface (1112a). A portion of the insulating material layer (150) is located between the first outer peripheral wall (1211a) and the first inner peripheral wall (1111a), and a portion of the insulating material layer (150) is located between the lower end wall (1211b) and the step bottom surface (1112a). Both the first outer peripheral wall (1211a) and the step bottom surface (1112a) are in contact with the insulating material layer (150).

6. The electric pump according to claim 5, characterized in that, The metal pump housing (111) includes a guide surface (1114a), which is located at one end of the first inner peripheral wall (1111a) away from the bottom surface (1112a) of the step, and the guide surface (1114a) is tapered toward the first inner peripheral wall (1111a).

7. The electric pump according to any one of claims 1 to 6, characterized in that, The stator assembly (120) includes a coil frame (122), which is injection molded with the stator core (121) as an insert. The stator core (121) is formed by stacking silicon steel sheets.

8. The electric pump according to any one of claims 1 to 7, characterized in that, The thickness of the insulating material layer (150) is defined as D, where 0.05mm ≤ D ≤ 0.2mm.

9. The electric pump according to claim 8, characterized in that, 0.08mm≤D≤0.12mm.

10. A thermal management system characterized by, The device includes an electric drive assembly (200) and an electric pump (100). The electric drive assembly (200) includes a housing (210). The electric pump (100) includes a stator assembly (120) and a housing assembly (110). The stator assembly (120) is located in a first cavity (114) of the housing assembly (110). The stator assembly (120) includes a stator core (121). The housing assembly (110) includes a metal pump housing (111). The metal pump housing (111) is in contact with the metal portion of the housing (210). The electric pump (100) includes an insulating material layer (150). The insulating material layer (150) is located between the outer wall of the stator core (121) and the inner wall of the metal pump housing (111). The metal portions of the metal pump housing (111) and the stator core (121) are both in contact with the insulating material layer (150).

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