Shell assembly of motor and motor controller

Abstract

The utility model provides a shell assembly of a motor and a motor controller. The shell assembly comprises a motor shell and an electric control shell integrally arranged at the bottom of the motor shell. The motor shell is used for accommodating a motor, and the motor is provided with a first signal connecting assembly and a first connecting copper bar; the electric control shell is used for accommodating the electric control board, and the electric control board is provided with a second signal connection assembly and a second connection copper bar; a first accommodating cavity and a second accommodating cavity are arranged between the motor shell and the electric control shell, and the first accommodating cavity and the second accommodating cavity are isolated from each other; an oil cooling flow channel is arranged in the motor shell; the first accommodating cavity is arranged in a sealing manner and is communicated with the oil cooling flow channel; and a water cooling flow channel is arranged in the electric control shell. According to the scheme, the electric control shell is arranged at the bottom of the motor shell, the space above the motor is saved, installation of the motor and a whole vehicle is facilitated, the structure is more compact, the first containing cavity and the second containing cavity are connected with the low-voltage signal line and the high-voltage copper bar respectively, electromagnetic isolation can be achieved, the anti-interference capacity is high, and the EMC performance is good.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a housing assembly of a motor and a motor controller. Background Art

[0002] Electric vehicles are an important part of the new energy vehicle field. The motor and motor controller of traditional electric vehicles are usually independent of each other. At present, in order to reduce the space occupied by the motor and electronic control, the electronic control is usually integrated on the top of the motor and connected using an internal three-phase copper busbar.

[0003] However, in the existing motor-electronic control integrated structure, the electronic control occupies the upper space of the motor, reducing the utilization rate of the space above the motor. In addition, after the motor and electronic control are internally connected using copper busbars, signal connection components, etc., coupling interference is easily generated between the high-voltage copper busbars and the low-voltage signal lines, resulting in poor EMC performance of the overall bridge. Utility Model Content

[0004] Based on this, the utility model provides a housing assembly of a motor and a motor controller to solve the problem that the existing housing assembly of the motor and the electronic control easily causes electromagnetic interference between the high-voltage copper bus and the low-voltage signal line, resulting in poor EMC performance.

[0005] The utility model provides a housing assembly of a motor and a motor controller, comprising a motor housing and an electric control housing integrated at the bottom of the motor housing;

[0006] The motor housing is used to accommodate the motor, and the motor is provided with a first signal connection component and a first connection copper bar; the electric control housing is used to accommodate the electric control board, and the electric control board is provided with a second signal connection component and a second connection copper bar;

[0007] A first accommodating cavity for accommodating the first signal connection component and the second signal connection component and a second accommodating cavity for accommodating the first connection copper bar and the second connection copper bar are provided between the motor housing and the electric control housing, and the first accommodating cavity and the second accommodating cavity are isolated from each other;

[0008] An oil cooling channel is arranged in the motor housing, and the first accommodating cavity is sealed and communicated with the oil cooling channel; a water cooling channel is arranged in the electric control housing.

[0009] In one embodiment, a junction box is integrated on the motor housing, and the junction box and the motor housing are enclosed to form a wiring cavity with a bottom opening, and a partition is provided in the wiring cavity, and the partition divides the interior of the wiring cavity into the first accommodating cavity and the second accommodating cavity;

[0010] The electric control housing is provided with a wire outlet hole which is opposite to and communicates with the wiring cavity, and the wire outlet hole is used to lead out the second signal connection component and the second connection copper busbar.

[0011] In one embodiment, the partition is transversely arranged in the wiring cavity to separate the wiring cavity into two upper and lower cavities, the upper cavity is the first accommodating cavity, and the lower cavity is the second accommodating cavity;

[0012] The partition is provided with a threading hole, and the threading hole is used for allowing the second signal connection component located in the second accommodating cavity to pass through and extend into the first accommodating cavity. A sealing component is provided at the threading hole.

[0013] In one of the embodiments, a shielding tube is disposed in the second accommodating cavity, the shielding tube is connected to the threading hole, and the shielding tube is used for electromagnetic shielding of a second signal connection component extending into the second accommodating cavity.

[0014] In one embodiment, the partition is longitudinally arranged in the wiring cavity to separate the wiring cavity into two left and right cavities, namely the first accommodating cavity and the second accommodating cavity;

[0015] A sealing assembly is arranged at a position of the bottom of the first accommodating cavity opposite to the wire outlet hole.

[0016] In one embodiment, the partition is made of metal material.

[0017] In one of the embodiments, a high-voltage DC interface is provided on the electronic control housing, and the high-voltage DC interface and the junction box are distributed at two ends of the housing assembly.

[0018] In one of the embodiments, the high voltage DC interface is arranged to be tilted upward.

[0019] In one of the embodiments, a high-voltage DC plug-in is connected to the high-voltage DC interface, and the high-voltage DC plug-in is extended along the inclined direction of the high-voltage DC interface.

[0020] In one of the embodiments, a fixing assembly is arranged between the electronic control housing and the motor housing, and the fixing assembly includes a plurality of positioning pins. A plurality of corresponding mounting holes are arranged at the bottom of the motor housing and the top of the electronic control housing, and each group of corresponding mounting holes is fixed with one positioning pin.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The housing assembly of the motor and the electronic control realizes the integration of the motor and the motor controller by arranging the electronic control housing at the bottom of the motor housing, and also saves the space above the motor, which is convenient for the installation of the motor and the whole vehicle, and the structure is more compact. By defining a mutually isolated first accommodating cavity and a second accommodating cavity between the motor housing and the electronic control housing, the first signal connection component of the motor and the second signal connection component of the electronic control can be docked in the first accommodating cavity, and the first connecting copper bar and the second connecting copper bar can be docked in the second accommodating cavity, so that the electromagnetic isolation of the low-voltage signal connection component and the high-voltage copper bar can be achieved, and the anti-interference ability is strong and the EMC performance is good. In addition, the design of oil cooling of the motor housing and water cooling of the electronic control housing can realize the independent cooling of the heat dissipation of the motor and the electronic control, with better sealing effect and higher reliability, and the isolated first accommodating cavity can be connected to the oil cooling channel of the motor housing alone to achieve the heat dissipation of the signal connection component and ensure the transmission accuracy of the sensor signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a housing assembly of a motor and a motor controller in one embodiment;

[0024] Figure 2 A schematic diagram of the structure of a housing assembly with a sealing cover removed in one embodiment;

[0025] Figure 3 is a top view of an electronic control housing of a housing assembly in one embodiment;

[0026] Figure 4 is a right side view of a housing assembly in one embodiment;

[0027] Figure 5 It is a schematic diagram of a DC high voltage plug-in installed on a housing assembly in an embodiment.

[0028] The reference numerals in the drawings of the specification include: electric control housing 1, motor housing 2, junction box 3, first accommodating cavity 301, second accommodating cavity 302, partition 303, shielding tube 4, high-voltage DC interface 5, high-voltage DC plug-in 6, outlet hole 7, and mounting hole 8. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0031] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0032] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] The embodiment of the utility model provides a housing assembly of a motor and a motor controller, which includes a motor housing 2 and an electric control housing 1 integrated at the bottom of the motor housing 2;

[0034] The motor housing 2 is used to accommodate the motor, and the motor is provided with a first signal connection component and a first connection copper bar; the electric control housing 1 is used to accommodate the electric control board, and the electric control board is provided with a second signal connection component and a second connection copper bar;

[0035] A first accommodating cavity 301 for accommodating the first signal connection component and the second signal connection component and a second accommodating cavity 302 for accommodating the first connection copper bar and the second connection copper bar are provided between the motor housing 2 and the electric control housing 1. The first accommodating cavity 301 and the second accommodating cavity 302 are isolated from each other.

[0036] An oil cooling channel is provided in the motor housing 2 , and the first accommodating chamber 301 is sealed and communicated with the oil cooling channel; a water cooling channel is provided in the electric control housing 1 .

[0037] The motor electronic control housing 1 assembly provided by the embodiment of the utility model realizes the integration of the motor and the motor controller by arranging the electronic control housing 1 at the bottom of the motor housing 2, and also saves the space above the motor, which is convenient for the installation of the motor and the whole vehicle, and the structure is more compact. By defining a mutually isolated first accommodating chamber 301 and a second accommodating chamber 302 between the motor housing 2 and the electronic control housing 1, the first signal connection component of the motor and the second signal connection component of the electronic control can be docked in the first accommodating chamber 301, and the first connecting copper bar and the second connecting copper bar can be docked in the second accommodating chamber 302, so that the electromagnetic isolation of the low-voltage signal connection component and the high-voltage copper bar can be achieved, and the anti-interference ability is strong and the EMC performance is good. In addition, the design of oil cooling of the motor housing 2 and water cooling of the electronic control housing 1 can realize the mutual independence of the heat dissipation and cooling of the motor and the electronic control, with better sealing effect and higher reliability, and the isolated first accommodating chamber 301 can be connected to the oil cooling channel of the motor housing 2 alone to achieve the heat dissipation of the signal connection component and ensure the transmission accuracy of the sensor signal.

[0038] The housing assembly of the motor and the motor controller provided by the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0039] according to Figure 1 The housing assembly of the motor and the motor controller of at least one embodiment of the utility model is exemplarily shown, and the housing assembly of the motor and the motor controller includes: a motor housing 2 and an electric control housing 1.

[0040] The motor housing 2 is used to accommodate the motor. Specifically, the motor housing 2 is used to accommodate the internal components of the motor, such as the rotor assembly and the stator assembly, to provide protection for the internal components of the motor from external impact and external environmental pollution. In this embodiment, the motor housing 2 can be adaptively set to any shape, for example, Figure 1 An embodiment in which the motor housing 2 is approximately circular is shown by way of example.

[0041] The electric control housing 1 is used to accommodate the electric control board. Specifically, the electric control housing 1 is used to accommodate the components of the electric control board, such as capacitors, filters, power modules, and control boards, to provide protection for the internal components of the electric control, so that they are protected from external impacts and external environmental pollution. The electric control housing 1 can also be adaptively set to any shape to facilitate the installation and connection of the electric control housing 1 and the motor housing 2.

[0042] See also Figure 1 In this embodiment, the electronic control housing 1 is preferably flat, and its internal components are mainly arranged in a flat manner to minimize the thickness of the electronic control housing 1 and make the overall height of the motor electronic control housing assembly lower to avoid damage caused by the impact of sand and gravel from the road surface.

[0043] The motor is provided with a first signal connection component and a first connection copper bar (not shown in the figure). The first signal connection component is electrically connected to various sensors and detectors of the motor to transmit various parameter signals of the motor to the motor controller, monitor the operation data of the motor, and ensure the operation safety of the motor. For example, the first signal connection component can be connected to the temperature sensor, rotary transformer sensor and other signals of the motor. The first connection copper bar is the input copper bar of the motor, which is used to receive the current input by the motor controller and conduct it to the motor to ensure the power-on operation of the motor.

[0044] The electric control board is provided with a second signal connection component and a second connection copper bar (not shown in the figure). The second signal connection component is led out from the PCBA circuit board of the electric control board, and is used to realize the control signal transmission between the motor controller and the motor; the second connection copper bar is the output copper bar of the motor controller, which is used to output current to the motor. In this way, the second signal connection component and the second connection copper bar can realize the current conduction and control signal transmission between the motor and the motor controller.

[0045] Specifically, in this embodiment, the first signal connection component and the second signal connection component may both include a docking plug and a signal harness. The signal harnesses of the first signal connection component and the second signal connection component are connected to the motor and the motor controller respectively, and the docking plugs of the two are plugged in and matched to achieve the connection between the first signal connection component and the second signal connection component.

[0046] See also Figure 1 The electric control housing 1 is integrated with the bottom of the motor housing 2. For example, the electric control housing 1 is fixed to the bottom of the motor housing 2 by a fixing assembly. For details, see Figure 3 In this embodiment, the fixing assembly specifically includes a plurality of positioning pins, and a plurality of corresponding mounting holes 8 are provided at the bottom of the motor housing 2 and the top of the electronic control housing 1. By fixing the positioning pins in the corresponding mounting holes 8 of the motor housing 2 and the electronic control housing 1, the connection between the motor housing 2 and the electronic control housing 1 can be achieved.

[0047] See also Figure 2A first accommodating chamber 301 and a second accommodating chamber 302 are provided between the motor housing 2 and the electric control housing 1, and the first accommodating chamber 301 and the second accommodating chamber 302 are isolated from each other. The first signal line connection component of the motor and the second electric signal line connection component of the electric control are both routed to the first accommodating chamber 301 and connected in the first accommodating chamber 301; the first connecting copper bar of the motor and the second connecting copper bar of the electric control are both extended into the second accommodating chamber 302 and connected in the second accommodating chamber 302. In this way, by isolating the first accommodating chamber 301 and the second accommodating chamber 302 from each other, and connecting the low-voltage signal line and the high-voltage copper bar in the two accommodating chambers respectively, the high and low voltage routing isolation of the motor and the electric control can be achieved, mutual electromagnetic interference can be avoided, the anti-interference ability is strong, the EMC performance is good, and the operation stability of the motor is improved.

[0048] For details, see Figure 1 and Figure 2 In this embodiment, a junction box 3 is integrated on one side of the motor housing 2. The junction box 3 and the outer wall of the motor housing 2 enclose a wiring cavity with a bottom opening. A sealing cover is provided on one side of the junction box 3. The sealing cover is detachable so that the sealing cover can be removed when wiring. A partition 303 is provided in the wiring cavity. The partition 303 separates the wiring cavity into two small cavities isolated from each other. The two small cavities are the first accommodating cavity 301 and the second accommodating cavity 302. The first signal connection component of the motor is located in the first accommodating cavity 301, and the wiring terminal of the first connection copper bar of the motor is located in the second accommodating cavity 302.

[0049] Correspondingly, see Figure 3 The electric control housing 1 is provided with a wire outlet hole 7, which is directly opposite to the bottom opening of the junction box 3; the second signal connection component of the motor controller can pass through the wire outlet hole 7 and extend into the first accommodating cavity 301, and connect with the first signal connection component in the first accommodating cavity 301; the second connection copper bar of the motor controller can pass through the wire outlet hole 7 and extend into the second accommodating cavity 302, and connect with the first connection copper bar in the second accommodating cavity 302.

[0050] For more details, see Figure 2 In this embodiment, the partition 303 is transversely arranged in the junction box 3, and the interior of the junction box 3 is divided into two upper and lower cavities, wherein the first accommodating cavity 301 is the upper cavity, and the second accommodating cavity 302 is the lower cavity, and the second accommodating cavity 302 is relatively connected with the outlet hole 7 of the electric control housing 1. The partition 303 is provided with a threading hole, and the wire harness of the second signal connection component is led out from the outlet hole 7 and extended into the second accommodating cavity 302, and then penetrates into the first accommodating cavity 301 from the threading hole, so as to realize the connection between the first signal connection component and the second signal connection component.

[0051] For further information, see Figure 2In this embodiment, a shielding tube 4 for electromagnetic shielding is also provided in the second accommodating cavity 302. The shielding tube 4 can be made of metals such as copper, aluminum, and steel. The shielding tube 4 is connected to the threading hole, and the signal line extending into the second accommodating cavity 302 is passed through the shielding tube 4. In this way, the shielding tube 4 can achieve electromagnetic isolation between the copper bus and the signal line, thereby ensuring the EMC of the motor electronic control.

[0052] In other examples not shown, the partition 303 is longitudinally arranged in the junction box 3, dividing the interior of the junction box 3 into two left and right cavities, wherein the first accommodating cavity 301 is the cavity on the left, and the second accommodating cavity 302 is the cavity on the right. The first accommodating cavity 301 and the second accommodating cavity 302 are both relatively connected to the outlet hole 7 of the electric control housing 1, so that the second signal connection component of the electric control can directly pass through the outlet hole 7 and extend into the first accommodating cavity 301, and the second connection copper bar can directly extend into the second accommodating cavity 302. In this arrangement, the signal line does not need to be routed through the second accommodating cavity 302, further ensuring the electromagnetic isolation between the signal line and the copper bar, and ensuring the EMC of the motor electric control.

[0053] Furthermore, in this embodiment, the partition 303 is made of electromagnetic shielding material, for example, the partition 303 is made of metal materials such as copper, aluminum, and steel. In this way, the partition 303 has a better battery shielding effect, ensuring the electromagnetic isolation between the first accommodating cavity 301 and the second accommodating cavity 302, thereby ensuring the electromagnetic isolation between the low-voltage signal line and the high-voltage copper bus.

[0054] In this embodiment, the motor housing 2 and the electronic control housing 1 are both provided with heat dissipation structures, and the heat dissipation structures of the two are independently provided and are not connected to each other. With such a setting, cooling and heat dissipation can be performed when the motor and the electronic control are running, ensuring the stable operation of the motor and the motor controller, and the independent setting of the heat dissipation structures of the motor and the electronic control can make the heat dissipation structures of the motor and the electronic control have better sealing effect and higher reliability than the connected design, and it is also convenient to use different cooling methods for cooling.

[0055] Specifically, in this embodiment, the motor adopts oil cooling, which has higher cooling efficiency and better insulation performance than the traditional water cooling. Accordingly, the motor housing 2 provided in this embodiment is provided with an oil cooling structure, which may include an oil cooler, an oil pump, and an oil cooling channel and an oil storage tank provided in the motor housing 2. The specific oil cooling structure may refer to the oil cooling structure of the existing flat wire motor, which will not be described in detail in this embodiment.

[0056] Furthermore, in this embodiment, the oil cooling channel of the motor housing 2 is connected to the first accommodating chamber 301, and the first accommodating chamber 301 is sealed. For example, when the partition 303 is arranged horizontally, a sealing component (not shown in the figure) is arranged on the threading hole of the partition 303, and when the partition 303 is arranged vertically, a sealing component is arranged at the bottom of the first accommodating chamber 301, and the sealing component is a sealing plug that can pass the wire. With such an arrangement, the heat dissipation of the signal line connection component can be achieved, the transmission accuracy of the sensor signal can be ensured, and part of the heat in the second accommodating chamber 302 can be dissipated through the heat conduction of the partition 303, thereby improving the overall heat dissipation effect.

[0057] In this embodiment, the motor controller is water-cooled. Accordingly, a water-cooling channel is provided on the electric control housing 1. The heat of the motor controller is taken away by the circulation of cooling water to achieve rapid heat dissipation of the motor controller. The arrangement of the water-cooling channel can refer to the water-cooling channel of the existing motor controller, and will not be described in detail in this embodiment.

[0058] In this embodiment, the electric control housing 1 is also provided with a high-voltage DC interface 5, which is used to connect to an external power source to supply power to the motor controller. Figure 4 The high-voltage DC interface 5 is arranged on the side of the electric control housing 1 away from the junction box 3, separating the high-voltage DC from the low-voltage signal line, which can further ensure the electromagnetic isolation of the low-voltage signal line from the external high-voltage electric field and magnetic field, and ensure the operating stability of the motor electronic control.

[0059] For further information, see Figure 4 In this embodiment, the high-voltage DC interface 5 is tilted upward, for example, tilted upward by 45 degrees. In this arrangement, since the electric control housing 1 is arranged at the bottom of the motor housing 2, it is necessary to operate from below the motor when wiring the motor controller. In this embodiment, the high-voltage DC interface 5 is tilted upward, which is more convenient for connecting the controller and the power supply, making the wiring of the whole vehicle more convenient and orderly.

[0060] See also Figure 5 A high-voltage DC plug-in 6 is connected to the high-voltage DC interface 5. The high-voltage DC plug-in 6 is extended along the inclined direction of the high-voltage DC interface 5. The high-voltage DC plug-in 6 is used to directly connect to a power source to provide power input for the controller.

[0061] Other structures and operations of the housing assembly of the motor and the motor controller according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0062] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. The housing assembly of the motor and the motor controller is characterized in that: It comprises a motor housing (2) and an electric control housing (1) which is integrated and arranged at the bottom of the motor housing (2); The motor housing (2) is used to accommodate the motor, and the motor is provided with a first signal connection component and a first connection copper bar; the electric control housing (1) is used to accommodate the electric control board, and the electric control board is provided with a second signal connection component and a second connection copper bar; A first accommodating cavity (301) for accommodating the first signal connection component and the second signal connection component and a second accommodating cavity (302) for accommodating the first connection copper bar and the second connection copper bar are provided between the motor housing (2) and the electric control housing (1), and the first accommodating cavity (301) and the second accommodating cavity (302) are isolated from each other; An oil cooling channel is provided in the motor housing (2), and the first accommodating chamber (301) is sealed and communicated with the oil cooling channel; a water cooling channel is provided in the electric control housing (1).

2. The housing assembly according to claim 1, characterized in that: The motor housing (2) is integrally provided with a junction box (3), the junction box (3) and the motor housing (2) enclose a junction cavity with a bottom opening, a partition (303) is provided in the junction cavity, and the partition (303) divides the interior of the junction cavity into the first accommodating cavity (301) and the second accommodating cavity (302); The electric control housing (1) is provided with a wire outlet hole (7) opposite to and in communication with the wiring cavity, and the wire outlet hole (7) is used to lead out the second signal connection component and the second connection copper busbar.

3. The housing assembly according to claim 2, characterized in that: The partition (303) is transversely arranged in the wiring cavity to separate the wiring cavity into two upper and lower cavities, the upper cavity being the first accommodating cavity (301) and the lower cavity being the second accommodating cavity (302); The partition (303) is provided with a threading hole, the threading hole is used for allowing the second signal connection component located in the second accommodating cavity (302) to pass through and extend into the first accommodating cavity (301), and a sealing component is provided at the threading hole.

4. The housing assembly according to claim 3, characterized in that: A shielding tube (4) is arranged in the second accommodating cavity (302), the shielding tube (4) being connected to the threading hole, and the shielding tube (4) being used for electromagnetic shielding of a second signal connection component extending into the second accommodating cavity (302).

5. The housing assembly according to claim 2, characterized in that: The partition (303) is longitudinally arranged in the wiring cavity to divide the wiring cavity into two left and right cavities, namely the first accommodating cavity (301) and the second accommodating cavity (302); A sealing assembly is provided at a position of the bottom of the first accommodating cavity (301) opposite to the wire outlet hole (7).

6. The housing assembly according to any one of claims 2 to 5, characterized in that: The partition (303) is made of metal material.

7. The housing assembly according to claim 2, characterized in that: The electric control housing (1) is provided with a high-voltage direct current interface (5), and the high-voltage direct current interface (5) and the junction box (3) are distributed at two ends of the housing assembly.

8. The housing assembly according to claim 7, characterized in that: The high-voltage direct current interface (5) is arranged tilted upward.

9. The housing assembly according to claim 8, characterized in that: A high-voltage DC plug-in (6) is connected to the high-voltage DC interface (5), and the high-voltage DC plug-in (6) is extended along the inclined direction of the high-voltage DC interface (5).

10. The housing assembly according to claim 9, characterized in that: A fixing assembly is provided between the electric control housing (1) and the motor housing (2), the fixing assembly comprising a plurality of positioning pins, a plurality of one-to-one corresponding mounting holes (8) are provided at the bottom of the motor housing (2) and the top of the electric control housing (1), and each group of corresponding mounting holes (8) is fixedly provided with one positioning pin.

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