Power supply device, power assembly and electric vehicle

Abstract

The utility model discloses a power supply device, a power assembly and an electric vehicle, and relates to the technical field of power assembly noise reduction, a shell of the power supply device comprises an electric control groove, the electric control groove is used for enclosing a plurality of electric appliance parts of a motor controller together with a cover plate, the shell of the power supply device comprises a protrusion, and the protrusion is located in the electric control groove. One protrusion is distributed between at least two electric appliance components, and the other protrusion penetrates through the space between the two electric appliance components and is connected with the inner wall of the electric control groove and the cover plate. According to the invention, the projection is arranged in the electric control groove, the interior of the electric control groove and the cover plate are fixedly connected through the projection, large vibration of a middle suspended area of the cover plate caused by a large coverage area is prevented, and a plurality of areas of the cover plate are fixed on the shell of the electric control groove, so that the cover plate is prevented from being excited to be in a vibration mode; the radiation noise is reduced, and the NVH performance and the like of the power assembly are improved.

Description

Technical Field

[0001] This application relates to the field of powertrain noise reduction technology, and in particular to a power supply device, powertrain, and electric vehicle. Background Technology

[0002] Electric vehicles use a powertrain as their power source, which converts electrical energy from the energy storage battery into mechanical energy to propel the vehicle forward. The powertrain controls the operation of the drive motor through a motor controller, which is housed in an electrical control chamber. The cover of the electrical control chamber is typically large in area and thin in thickness, with a low modal frequency. Under external excitation from other components during vehicle operation, it is easy to excite its vibration modes, generating significant radiated noise and severely affecting the powertrain's noise, vibration, and harshness (NVH) performance. Utility Model Content

[0003] This application provides a power supply device, a powertrain, and an electric vehicle. In a first aspect, the housing of the power supply device includes an electrical control slot for enclosing multiple electrical components of a motor controller with a cover plate. The housing of the power supply device includes a protrusion located within the electrical control slot, distributed between at least two electrical components, passing through the space between the two electrical components and connecting the inner wall of the electrical control slot and the cover plate, respectively.

[0004] This application establishes a protrusion inside the electrical control slot, which fixes the interior of the electrical control slot and the cover plate. This prevents the large area of ​​the cover plate from vibrating excessively due to its large coverage area. By fixing multiple areas of the cover plate to the housing of the electrical control slot, the cover plate is prevented from being excited into vibration modes, reducing radiated noise and improving the NVH performance of the powertrain.

[0005] In one possible implementation, the motor controller includes two circuit boards arranged in a direction perpendicular to the thickness of the cover plate. A protrusion is located between the two circuit boards, and the two circuit boards are used to connect the two electrical components respectively. The two ends of the protrusion along the thickness direction of the cover plate are connected to the cover plate and the bottom wall of the electrical control slot respectively.

[0006] This application addresses distributed powertrains by integrating two motor controllers into a single electrical control slot. Only one slot and a cover plate are needed to enclose and protect the two motor controllers, simplifying the structural design and manufacturing process and improving the powertrain's integration. Furthermore, protrusions within the electrical control slot securely connect the larger cover plate to the bottom of the slot, preventing external vibrations from generating excessive radiated noise. This does not affect the arrangement and fixation of the two circuit boards within the slot, thus improving the powertrain's NVH performance.

[0007] In one possible implementation, the powertrain includes a rubber strip located between the protrusion and the cover plate, with both sides of the rubber strip connected to the inner wall surfaces of the protrusion and the cover plate respectively along the thickness direction of the cover plate.

[0008] In this embodiment, the rubber strip is contained in the gap between the protrusion and the cover plate, which plays a shock absorption role between the protrusion and the cover plate, prevents rigid connection between the protrusion and the cover plate, prevents rigid collision between the protrusion and the cover plate under the working vibration of the powertrain, and prevents noise from being generated between the protrusion and the cover plate.

[0009] In one possible implementation, the width of the adhesive strip along a direction perpendicular to the thickness of the cover plate is greater than the width of the protrusion. The adhesive strip includes at least two portions arranged along a direction perpendicular to the thickness of the cover plate. One portion of the adhesive strip is located on one side of the protrusion along the direction perpendicular to the thickness of the cover plate, and the other portion of the adhesive strip is located on one side of the protrusion along the thickness direction of the cover plate. The height of the one portion of the adhesive strip along the thickness direction of the cover plate is greater than the height of the other portion of the adhesive strip, and the height of the other portion of the adhesive strip along the thickness direction of the cover plate is equal to the distance between the protrusion and the cover plate.

[0010] In this embodiment, the width of the adhesive strip is greater than the width of the protrusion, so that the adhesive strip can cover the gap between the protrusion and the cover plate. The edge of the protrusion is also buffered by the adhesive strip and the cover plate to prevent noise caused by collision between the cover plate and the protrusion due to rigid connection, thereby improving the noise reduction effect of the adhesive strip.

[0011] In one possible implementation, the length of a protrusion along a direction perpendicular to the thickness of the cover plate is greater than the length of the motor controller. The protrusion is used to separate the electrical control slot into two receiving spaces, which are used to respectively accommodate the two electrical components.

[0012] In this embodiment, the protrusion divides the electrical control slot into two spaces spaced apart along the axial direction of the powertrain. Each space is used to accommodate a circuit board, and the two circuit boards are installed in the two spaces respectively. On the one hand, the protrusion can fix the cover plate and the bottom wall of the electrical control slot, and on the other hand, it can form a baffle between the two circuit boards to prevent the electrical components on the two circuit boards from generating electromagnetic interference.

[0013] In one possible implementation, the height of one protrusion along the thickness direction of the cover plate is less than or equal to the depth of the electrical control groove, and the cover plate includes another protrusion along the thickness direction of the cover plate for fixed connection with the first protrusion.

[0014] In this embodiment, by providing another protrusion on the inner wall of the cover plate, the thickness of a portion of the cover plate can be increased, thereby increasing the structural strength of the cover plate and reducing the vibration noise generated by the cover plate due to external excitation.

[0015] In one possible implementation, one end of a protrusion along the thickness direction of the cover plate includes a plane for fixing and parallel to the inner wall surface of the cover plate.

[0016] In this embodiment, the gap between the end face of the protrusion and the cover plate is evenly distributed so that the rubber strips are evenly spaced between the protrusion and the cover plate, preventing the rubber strips from shifting or detaching from the cover plate and the protrusion during the working vibration of the powertrain.

[0017] In one possible implementation, the protrusion includes a threaded hole, the cover plate includes a through hole for penetrating the cover plate along its thickness direction and opposite to the threaded hole, and the power supply device includes a bolt for passing through the through hole and the threaded hole and fixing the protrusion and the cover plate together.

[0018] In this embodiment, the protrusion and the cover plate are fixed by bolts, which can achieve a fixed connection between the protrusion and the cover plate, and make the installation more convenient. It also makes it easier to disassemble the cover plate and the protrusion to facilitate the maintenance of the components in the electrical control slot.

[0019] In one possible implementation, the through hole along the thickness direction of the cover plate includes two inner walls. The inner diameter of one inner wall of the through hole is larger than the inner diameter of the other inner wall and the outer diameter of the bolt head. The space enclosed by the inner wall is used to accommodate the bolt head. The threaded post of the bolt is used to pass through the space enclosed by the other inner wall and extend into the threaded hole.

[0020] In this embodiment, along the through-hole's penetration direction, the length of the first inner wall surface is greater than or equal to the height of the bolt head. After the bolt is passed through the through-hole and screwed into the threaded hole, the bolt's threaded post passes through the space enclosed by the second inner wall surface and enters the threaded hole. The threaded post and the internal thread of the threaded hole engage to fix the bolt to the bottom wall of the cover plate and the electrical control slot. The bolt head can be completely recessed into the through-hole and is stuck within the space enclosed by the first inner wall surface, preventing it from entering the space enclosed by the second inner wall surface, thus concealing the fixing bolt.

[0021] In one possible implementation, the bolt includes a rubber ring for surrounding the outer circumferential surface of the bolt head along the circumferential direction of the bolt. Along the radial direction of the bolt, the inner diameter of the rubber ring is equal to the outer diameter of the bolt head, and the outer diameter of the rubber ring is equal to the inner diameter enclosed by the section of inner wall.

[0022] In this embodiment, the rubber ring surrounds the outer circumferential surface of the bolt head. Along the radial direction of the bolt, the inner diameter of the rubber ring is equal to the outer diameter of the bolt head, and the rubber ring tightly wraps around the bolt head. The outer diameter of the rubber ring is equal to the inner diameter of a section of the inner wall, that is, the outer diameter of the rubber ring is equal to the inner diameter of the space enclosed by the first inner wall surface. The rubber ring can fit tightly against the first inner wall surface and is supported between the outer circumferential surface of the bolt head and the first inner wall surface, preventing the outer circumferential surface of the bolt head from rigidly contacting the second inner wall surface and causing noise.

[0023] In one possible implementation, the length of the rubber ring along the thickness direction of the cover plate is greater than the length of the bolt head. Along the axial direction of the bolt, a portion of the rubber ring is positioned on one side of the bolt head along with the threaded rod. The portion of the rubber ring is spaced between the bolt head and the inner wall of the through hole along the axial direction of the bolt. The portion of the rubber ring is connected to the inner wall of the bolt head and the inner wall of the through hole on both sides along the axial direction of the bolt, respectively.

[0024] In this embodiment, the length of the rubber ring is greater than the length of the bolt head. A portion of the rubber ring extends to the side of the bolt head facing the threaded post and is located within the corner space between the bolt head and the threaded post. When the bolt passes through the through hole and is screwed into the threaded hole, the bolt head contacts the third inner wall surface of the through hole along the axial direction of the bolt, further preventing hard contact between the bolt head and the inner wall surface of the through hole from generating noise.

[0025] In one possible implementation, the other inner wall section includes an internal thread, the inner diameter of which is equal to the inner diameter of the thread in the threaded hole.

[0026] In this embodiment, the threaded post of the bolt is fixedly connected to the internal thread of the second inner wall surface and the internal thread of the threaded hole, respectively, thereby improving the stability of the fixed connection between the bolt and the bottom wall of the cover plate and the electrical control groove.

[0027] Secondly, this application provides a powertrain including a power supply device as described in any of the above claims, wherein the housing of the powertrain and the housing of the power supply device are integral structures, the housing of the powertrain includes at least one motor slot, the motor slot being used to enclose the drive motor of the powertrain with another cover plate, and an electronic control slot being located on the radial side of the motor slot.

[0028] In one possible implementation, the protrusion within the electrical control slot extends in a direction perpendicular to the powertrain axis, the protrusion divides the electrical control slot into two receiving spaces, the two receiving spaces are spaced apart along the powertrain axis, and each receiving space is used to accommodate a motor controller.

[0029] This application addresses distributed powertrains by integrating two motor controllers into a single electrical control slot. Only one slot and a cover plate are needed to enclose and protect the two motor controllers, simplifying the structural design and manufacturing process and improving the powertrain's integration. Furthermore, protrusions within the electrical control slot securely connect the larger cover plate to the bottom of the slot, preventing external vibrations from generating excessive radiated noise. This does not affect the arrangement and fixation of the two circuit boards within the slot, thus improving the powertrain's NVH performance.

[0030] Thirdly, this application provides an electric vehicle, including wheels and a powertrain as described above, the powertrain being used to drive the wheels. The powertrain of this application features a protrusion within an electrical control slot, which securely connects the interior of the electrical control slot to a cover plate. This prevents significant vibration in the centrally suspended area of ​​the cover plate due to its large coverage area. By fixing multiple areas of the cover plate to the housing of the electrical control slot, it prevents the cover plate from being excited into vibration modes, reduces radiated noise, and improves the NVH (noise, vibration, and harshness) performance of the powertrain. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an electric vehicle provided in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the powertrain provided in an embodiment of this application;

[0033] Figure 3 This is an assembly diagram of a powertrain provided by an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the electrical control slot of a powertrain according to an embodiment of this application;

[0035] Figure 5This is a cross-sectional schematic diagram of a protrusion inside an electrical control groove provided in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of an electrical control slot that accommodates two circuit boards, according to an embodiment of this application.

[0037] Figure 7 This is a cross-sectional schematic diagram of a spacer strip between a cover plate and a protrusion provided in an embodiment of this application;

[0038] Figure 8 This is an assembly diagram of the cover plate, rubber strip, and protrusion provided in the embodiments of this application;

[0039] Figure 9 This is a schematic diagram illustrating the interaction between one protrusion and another protrusion according to an embodiment of this application;

[0040] Figure 10 This is a schematic diagram of another protrusion on the cover plate provided in the embodiments of this application;

[0041] Figure 11 This is a cross-sectional schematic diagram of a threaded hole, a through hole, and a bolt provided in an embodiment of this application;

[0042] Figure 12 This is an assembly diagram of a bolt, threaded hole, and through hole provided in an embodiment of this application;

[0043] Figure 13 This is a schematic diagram of the fixing assembly of bolts, cover plate and housing provided in the embodiments of this application;

[0044] Figure 14 This is a schematic diagram of the structure of a bolt provided in an embodiment of this application;

[0045] Figure 15 This is an assembly diagram of a rubber-coated bolt, cover plate, and housing provided in an embodiment of this application;

[0046] Figure 16 This is an assembly diagram of another rubber-coated bolt, cover plate and housing provided in the embodiments of this application. Detailed Implementation

[0047] The embodiments of this application are described below with reference to the accompanying drawings.

[0048] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0049] Electric vehicles use a powertrain as their power source, which converts electrical energy from the energy storage battery into mechanical energy to propel the vehicle forward. With the development of integrated and unibody powertrain housings, powertrains often integrate multiple components such as the drive motor, reducer, motor controller, and on-board charger. This results in multiple cavities on the powertrain housing to accommodate these components, requiring multiple covers for sealing. The powertrain controls the drive motor's operation through the motor controller, which is housed in an electrical control cavity within the housing. The cover of this cavity is typically large in area and thin in thickness, with a low modal frequency. Under external excitation from other components during vehicle operation, this can easily induce vibration modes in the motor controller, generating significant radiated noise and severely impacting the powertrain's noise, vibration, and harshness (NVH) performance.

[0050] To address the aforementioned issues, this application provides a power supply device, the housing of which includes an electrical control slot for enclosing multiple electrical components of a motor controller with a cover plate.

[0051] The power supply device housing includes a protrusion located within the electrical control slot. This protrusion is distributed between at least two electrical components, passing through the space between the two components and connecting the cover plate and the inner wall of the electrical control slot. This application, by establishing a protrusion within the electrical control slot and fixing it to the interior of the slot and the cover plate, prevents significant vibration in the central suspended area of ​​the cover plate due to its large coverage area. By fixing multiple areas of the cover plate to the housing of the electrical control slot, it prevents the cover plate from being excited into vibration modes, reduces radiated noise, and improves the NVH (noise, vibration, and harshness) performance of the powertrain.

[0052] This application provides an electric vehicle, which includes a two-wheeled, three-wheeled, or four-wheeled vehicle. In this application embodiment, the electric vehicle 1 includes a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), and a range-extended battery vehicle (REEV).

[0053] like Figure 1 As shown and Figure 2 As shown, Figure 1 This is a schematic diagram of an electric vehicle provided in an embodiment of this application. Figure 2This is a schematic diagram of a powertrain provided in an embodiment of this application. The electric vehicle 1 includes a powertrain 10, a power battery 20, and wheels 30. The power battery 20 is connected to an external power source, such as AC power, via a charger. The external power source charges the power battery 20 through the charger, and the power battery 20 stores electrical energy. The powertrain 10 receives the electrical energy transmitted from the power battery 20 and converts it into mechanical energy to drive the wheels 30 to rotate, thereby driving the electric vehicle 1 to move. In one embodiment, the powertrain 10 includes a drive motor 100 and a motor controller 200. The drive motor 100 of the powertrain 10 receives power from the power battery 20 through the motor controller 200 to drive the wheels 30. The motor controller 200 converts the received DC power from the power battery 20 into AC power to control the rotation of the drive motor 100, which in turn drives the wheels 30 to rotate. In one embodiment, the drive motor 100 of the powertrain 10 is used to drive either the two front wheels 30 or the two rear wheels 30 of the electric vehicle 1.

[0054] In one embodiment, the electric vehicle 1 includes a frame 40 for fixing the power battery 20 and the powertrain 10. The frame 40 serves as the structural skeleton of the electric vehicle 1, supporting and fixing the powertrain 10 and the power battery 20, and bearing the loads of the internal and external environment of the vehicle system.

[0055] This application provides a powertrain embodiment. For example... Figure 2 As shown, the powertrain 10 includes a drive motor 100, a motor controller 200, and a reducer 300. The motor controller 200 receives power from the power battery 20, converts direct current (DC) to alternating current (AC) and transmits it to the drive motor 100. The drive motor 100 converts electrical energy into mechanical energy. The drive motor 100 is connected to the reducer 300 for transmission, and the drive motor 100 drives the wheels 30 of the electric vehicle 1 to rotate via the reducer 300.

[0056] In one embodiment, the reducer 300 includes a single-speed reducer, a two-speed reducer, or a gearbox. In another embodiment, the reducer 300 includes an input shaft 310, an intermediate shaft 320, and an output shaft 330. Figure 2 As shown, the reducer 300 includes an input shaft 310, an intermediate shaft 320, and an output shaft 330. The input shaft 310 is used to drive the drive motor 100 and the intermediate shaft 320, the intermediate shaft 320 is used to drive the output shaft 330, and the output shaft 330 is used to drive the wheels 30. In one embodiment, the reducer 300 drives two wheels 30 respectively via two half-shafts 50.

[0057] This application provides a power supply device, the housing of which includes an electrical control slot for enclosing multiple electrical components of a motor controller with a cover plate.

[0058] In one embodiment, see Figure 3 , Figure 4 and Figure 5 As shown, Figure 3 An assembly diagram of a powertrain is shown. Figure 4 A schematic diagram of the electronic control slot of a powertrain is shown. Figure 5 A cross-sectional schematic diagram of a protrusion within an electrical control slot is shown. The power supply device is part of the powertrain 10 and integrated within the housing 400 of the powertrain 10. The power supply device includes a motor controller 200, which can be accommodated within a receiving cavity of the housing 400 of the powertrain 10. In one embodiment, the housing of the power supply device is the powertrain housing 400, which includes an electrical control slot 410. The electrical control slot 410 of the power supply device is used, along with a cover plate 500, to enclose multiple electrical components 210 of the motor controller 200. The electrical components 210 refer to components or combinations of components, such as capacitors and inductors, used within the motor controller 200 for power conversion.

[0059] In one embodiment, the housing 400 of the powertrain 10 includes an electrical control slot 410, a motor slot 420, and a reducer slot 430. The motor slot 420 accommodates the drive motor of the powertrain 10, and the axis of the drive motor is parallel to the axis of the motor slot 420. The motor slot 420 and the reducer slot 430 are located on opposite axial sides of the housing 400. Figure 3 The X-axis direction described herein is parallel. The slot opening of the motor slot 420 and the slot opening of the reducer slot 430 are oriented opposite to each other along the axial direction of the housing 400. A motor end cover and a reducer end cover are respectively provided at both ends of the housing 400 along the axial direction. The motor end cover is used to enclose the motor slot 420, and the reducer end cover is used to enclose the reducer slot 430.

[0060] The electrical control slot 410 is located on the radial side of the motor slot 420. The inner wall of the electrical control slot 410 is part of the outer wall of the motor slot 420. The axial length of the electrical control slot 410 can extend to the radial side of the reducer slot 430 in order to form a larger capacity cavity to accommodate the motor controller 200.

[0061] In one embodiment, the housing 400 includes a protrusion 440 located within the electrical control groove 410. The protrusion is distributed between at least two electrical components 210, and passes through the space between the two electrical components 210 and connects to the inner wall of the electrical control groove 410 and the cover plate 500, respectively.

[0062] In one embodiment, a protrusion 440 extends from the bottom wall of the electrical control slot 410 in a radial direction along the powertrain 10. The protrusion 440 includes a column, one axial end of which is connected to the bottom wall of the electrical control slot 410, and the other axial end of which is connected to a cover plate 500, to be supported between the bottom wall of the electrical control slot 410 and the cover plate 500, thus fixing the central region of the cover plate 500 to the bottom wall of the electrical control slot 410. In another embodiment, the electrical control slot 410 houses the circuit board 220 of the motor controller 200. The axial length of the electrical control slot 410 is greater than the axial length of the circuit board 220, and the width of the electrical control slot 410 perpendicular to the axial direction is greater than the width of the circuit board 220 perpendicular to the axial direction. The circuit board 220 of the motor controller 200 has a certain size. The design of the electrical control slot 410 can accommodate the circuit board 220 of the motor controller 200. However, the size of the electrical control slot 410 is slightly larger than the size of the circuit board 220. There is a small gap between the edge of the circuit board 220 and the side wall of the electrical control slot 410 to prevent the powertrain 10 from increasing in the axial and width directions due to the need to integrate the motor controller 200. Only the height of the side forming the electrical control slot 410 is increased by a certain size.

[0063] In one embodiment, see Figure 4 As shown, electrical components 210 on the circuit board 220 can be arranged. A through hole 221 is provided on the circuit board 220, and a protrusion 440 can pass through the through hole 221. One end of the protrusion 440 is between the circuit board 220 and the bottom wall of the electrical control groove 410 and is fixedly connected to the bottom wall of the electrical control groove 410. The other end of the protrusion 440 is between the circuit board 220 and the cover plate 500 and is fixedly connected to the cover plate 500. Electrical components 210 are respectively provided on both sides of the through hole 221 and on both sides of the protrusion 440.

[0064] In one embodiment, the protrusion 440 is connected to the sidewall of the electrical control groove 410. For example, the protrusion 440 extends a portion along one of the length directions of the electrical control groove 410 to connect with the sidewall of the electrical control groove 410. In this embodiment, the protrusion 440 is fixed inside the electrical control groove 410. Specifically, whether it is fixed to the sidewall or the bottom wall of the electrical control groove 410 is selected and designed according to the structure of the circuit board 220 and the electrical control groove 410.

[0065] In one embodiment, the protrusion 440 and the inner wall of the electrical control groove 410 are separable independent structures, fixed within the electrical control groove 410 by adhesives, clips, screws, or other structures. The protrusion 440 can be optionally installed on the electrical control groove 410, and its presence can be selected based on the NVH requirements of different powertrains 10. In another embodiment, the protrusion 440 and the inner wall of the electrical control groove 410 are an integral structure, with the protrusion 440 formed simultaneously during the integral injection molding or compression molding of the electrical control groove 410. The protrusion 440 possesses high structural strength.

[0066] In one embodiment, the protrusion 440 and the cover plate 500 can be fixed together by means of adhesive, clips and screws to fix the cover plate 500 and the housing 400.

[0067] In one embodiment, this application establishes a protrusion inside the electrical control slot, which fixes the interior of the electrical control slot and the cover plate together. This prevents the large area of ​​the cover plate from vibrating excessively due to its large coverage area. By fixing multiple areas of the cover plate to the housing of the electrical control slot, the cover plate is prevented from being excited into vibration modes, thus reducing radiated noise and improving the NVH performance of the powertrain.

[0068] See Figure 6 As shown, Figure 6 A schematic diagram of an electrical control slot accommodating two circuit boards is shown. In one embodiment, the motor controller 200 includes two circuit boards 220 arranged in a direction perpendicular to the thickness of the cover plate 500. A protrusion 440 is located between the two circuit boards 220. The two circuit boards 220 are used to connect two electrical components 210 respectively. The two ends of the protrusion 440 along the thickness direction of the cover plate 500 are respectively connected to the cover plate 500 and the bottom wall 411 of the electrical control slot 410.

[0069] In one implementation, see [reference] Figure 6 As shown, the two circuit boards 220 are arranged along the axial direction of the powertrain, which is parallel to the axial direction of the drive motor. In one embodiment, the two circuit boards 220 may also be arranged in a direction perpendicular to the axial direction of the powertrain. There are multiple arrangements of the two circuit boards 220 in the electrical control slot 410. The two circuit boards 220 are not stacked in the electrical control slot 410, so that the gap between the two circuit boards 220 can accommodate a protrusion 440.

[0070] The electrical control slot 410 can accommodate two circuit boards 220, which are arranged at intervals along the axial direction of the powertrain 10. A protrusion 440 passes through the gap between the two circuit boards 220, and electrical components 210 on the two circuit boards 220 are located on both sides of the protrusion 440 along the axial direction.

[0071] In one embodiment, see Figure 6As shown, the powertrain includes a distributed powertrain. A housing 400 of the distributed powertrain includes two motor slots 420, each accommodating a drive motor. The distributed powertrain integrates two drive motors, with their shafts protruding from both axial ends of the housing 400 and connected to a reducer. The two reducers are located at both axial ends of the housing 400. The two drive motors of the distributed powertrain are used to control either the two front wheels or the two rear wheels independently. In the distributed powertrain, the two drive motors are connected to the power battery via two motor controllers 200. Each motor controller 200 controls one drive motor. Each motor controller includes a circuit board 220, and the two circuit boards 220 of the two motor controllers are housed in an electrical control slot 410, with a protrusion 440 located between the two circuit boards.

[0072] In one embodiment, one end of the protrusion 440 is fixedly connected to the bottom wall 411 of the electrical control groove 410. Specifically, it can be glued, or the protrusion 440 and the side wall of the electrical control groove 410 can be integrally injection molded or compression molded.

[0073] This application addresses distributed powertrains by integrating two motor controllers into a single electrical control slot. Only one slot and a cover plate are needed to enclose and protect the two motor controllers, simplifying the structural design and manufacturing process and improving the powertrain's integration. Furthermore, protrusions within the electrical control slot securely connect the larger cover plate to the bottom of the slot, preventing external vibrations from generating excessive radiated noise. This does not affect the arrangement and fixation of the two circuit boards within the slot, thus improving the powertrain's NVH performance.

[0074] See Figure 7 As shown, Figure 7 A cross-sectional schematic diagram of a spacer strip between a cover plate and a protrusion is shown.

[0075] In one embodiment, the powertrain includes a rubber strip 600 located between a protrusion 440 and a cover plate 500, with both sides of the rubber strip 600 connected to the inner wall surfaces of the protrusion 440 and the cover plate 500 respectively along the thickness direction of the cover plate 500.

[0076] In one embodiment, a strip 600 is spaced between the protrusion 440 and the cover plate 500, and the projection of the strip 600 along the thickness direction of the cover plate 500 covers the protrusion 440. In one embodiment, the strip 600 includes damping adhesive, also known as putty or damping sheet, which is often used on the steel plate walls of automobile bodies to play a damping role in order to reduce noise and vibration.

[0077] Along the thickness direction of the cover plate 500, the height of the protrusion 440 is less than the distance between the bottom wall 411 of the electrical control groove 410 and the inner wall of the cover plate 500. There is a certain gap between the protrusion 440 and the cover plate 500. The rubber strip 600 is accommodated in the gap between the protrusion 440 and the cover plate 500, which plays a shock absorption role between the protrusion 440 and the cover plate 500, prevents rigid connection between the protrusion 440 and the cover plate 500, prevents rigid collision between the protrusion 440 and the cover plate 500 under the working vibration of the powertrain, and prevents noise from being generated between the protrusion 440 and the cover plate 500.

[0078] See Figure 8 As shown, Figure 8 This is an assembly diagram of the cover plate, rubber strip, and protrusion.

[0079] In one embodiment, the width of the adhesive strip 600 along the direction perpendicular to the thickness of the cover plate 500 is greater than the width of the protrusion 440. The adhesive strip 600 includes at least two portions arranged along the direction perpendicular to the thickness of the cover plate 500. One portion of the adhesive strip 600 is located on one side of the protrusion 440 along the direction perpendicular to the thickness of the cover plate 500, and the other portion of the adhesive strip 600 is located on one side of the protrusion 440 along the thickness direction of the cover plate 500. The height of one portion of the adhesive strip 600 along the thickness direction of the cover plate 500 is greater than the height of the other portion of the adhesive strip 600. The height of the other portion of the adhesive strip 600 along the thickness direction of the cover plate 500 is equal to the distance between the protrusion 440 and the cover plate 500.

[0080] In one implementation, Figure 8 The X direction is perpendicular to the 500mm thickness of the cover plate, along... Figure 8 In the X direction, the width of the adhesive strip 600 is greater than the width of the protrusion 440. The adhesive strip 600 includes two parts. The first part of the adhesive strip 610 is located between the cover plate 500 and the protrusion 440 along the thickness direction of the cover plate 500. The second part of the adhesive strip 620 has two parts and is located on both sides of the first part of the adhesive strip 610 along the X direction. The first part of the adhesive strip 610 and the second part of the adhesive strip 620 are arranged along the X direction. The second part of the adhesive strip 620 is located on one side of the protrusion 440 along the direction perpendicular to the thickness of the cover plate 500, that is, the second part of the adhesive strip 620 is located on one side of the protrusion 440 in the X direction.

[0081] Specifically, along the thickness direction of the cover plate 500, the height of the second part of the adhesive strip 620 is greater than the height of the first part of the adhesive strip 610; that is, along the thickness direction of the cover plate 500, the height of one part of the adhesive strip 600 is greater than the height of the other part of the adhesive strip 600. The height of the first part of the adhesive strip 610 is equal to the distance between the protrusion 440 and the cover plate 500; that is, along the thickness direction of the cover plate 500, the height of the other part of the adhesive strip 600 is equal to the distance between the protrusion 440 and the cover plate 500.

[0082] The adhesive strip described in this application is wider than the protrusion, allowing it to cover the gap between the protrusion and the cover plate. The edges of the protrusion are also cushioned by the adhesive strip and the cover plate, preventing noise caused by collisions between the cover plate and the protrusion due to their rigid connection, thus improving the noise reduction effect of the adhesive strip. During preparation, a relatively thick adhesive layer can be applied to the surface of the protrusion or the inner wall of the cover plate. The pressure between the cover plate and the protrusion causes the adhesive strip to extend to both sides, forming a shape similar to... Figure 8 The shown structure is a rubber strip structure.

[0083] In one embodiment, see Figure 6 As shown, along the direction perpendicular to the thickness of the cover plate 500, the length of a protrusion 440 is greater than the length of the motor controller 200. The protrusion 440 is used to separate the electrical control slot 410 into two receiving spaces, which are used to respectively accommodate two electrical components 210.

[0084] In one implementation, along Figure 6 Y direction shown, Figure 6 The Y-direction is perpendicular to the thickness direction of the cover plate 500 and perpendicular to the axial direction of the powertrain 10. The protrusion 440 includes a rib, and the rib is along... Figure 6 The rib extends in the Y direction, and the length of the rib in the Y direction is greater than the length of the motor controller 200, and the length of the rib in the Y direction is greater than the length of the circuit board 220.

[0085] The protrusion 440 divides the electrical control slot 410 into two spaces spaced apart along the axial direction of the powertrain. Each space is used to accommodate a circuit board. The two circuit boards are installed in the two spaces respectively. The protrusion 440 can fix the cover plate 500 and the bottom wall of the electrical control slot 410, and can also form a baffle between the two circuit boards to prevent electromagnetic interference from the electrical components on the two circuit boards.

[0086] See Figure 9 and Figure 10 As shown, Figure 9 A schematic diagram showing the mating of one protrusion and another is provided. Figure 10 A schematic diagram of another protrusion on the cover plate is shown.

[0087] In one embodiment, the height of a protrusion 440 along the thickness direction of the cover plate 500 is less than or equal to the depth of the electrical control groove 410, and the cover plate 500 includes another protrusion 510, which is used to be fixedly connected to a protrusion 440 along the thickness direction of the cover plate 500.

[0088] In one embodiment, along the thickness direction of the cover plate 500, such as Figure 9In the Z direction, the height of the protrusion 440 is less than or equal to the depth of the electrical control groove 410, and the protrusion 440 will not protrude beyond the electrical control groove 410 to prevent interference with the installation of the circuit board. Based on this, another protrusion 510 is provided on the inner wall of the cover plate 500. This other protrusion 510 and the protrusion 440 are opposite each other in the depth direction of the electrical control groove 410. The cover plate 500 is fixed by fixing one protrusion 440 and the other protrusion 510 together.

[0089] This application provides another protrusion 510 on the inner wall of the cover plate 500. The other protrusion 510 can increase the thickness of a portion of the cover plate 500, thereby increasing the structural strength of the cover plate 500 and reducing the vibration noise generated by the cover plate 500 due to external excitation.

[0090] In one embodiment, see Figure 8 As shown, one end of a protrusion 440 along the thickness direction of the cover plate 500 includes a plane 441, which is used to fix and is parallel to the inner wall surface of the cover plate 500.

[0091] In one embodiment, the end face of the protrusion 440 facing the cover plate 500 is a plane 441, which is parallel to the inner wall surface of the cover plate 500. The gap between one end face of the protrusion 440 and the cover plate 500 is evenly distributed so that the rubber strip 600 is evenly spaced between the protrusion 440 and the cover plate 500, preventing the rubber strip 600 from shifting or detaching from the cover plate 500 and the protrusion 440 during the working vibration of the power assembly 10.

[0092] In one embodiment, the end face of the protrusion 440 facing the cover plate 500 includes a groove, and the protrusion 440 includes a rib. The groove extends along the length of the rib, and the adhesive strip seals and fills the groove. During preparation, a sufficient amount of adhesive can be filled into the groove, with the height of the adhesive application greater than the depth of the groove. Then, the adhesive is squeezed through the cover plate 500 to form an adhesive strip between the cover plate 500 and the protrusion 440. Part of the adhesive strip can be squeezed into the groove, effectively preventing the adhesive strip from detaching from between the cover plate 500 and the protrusion 440.

[0093] See Figure 11 and Figure 12 As shown, Figure 11 A cross-sectional schematic diagram of a threaded hole, a through hole, and a bolt is shown. Figure 12 A schematic diagram of an assembly of bolts, threaded holes, and through holes is shown.

[0094] In one embodiment, see Figure 6 , Figure 11 and Figure 12As shown, a protrusion 440 includes a threaded hole 422, a cover plate 500 includes a through hole 520 for penetrating the cover plate 500 along its thickness direction and opposite to the threaded hole 422, and a power supply device includes a bolt 700 for passing through the through hole 520 and the threaded hole 422 and fixing the protrusion 440 and the cover plate 500.

[0095] In one embodiment, the protrusion 440 includes a screw post with an axially extending threaded hole 422. The length of the threaded hole 422 is greater than or equal to the length of the threaded segment of the bolt 700, and the inner diameter of the threaded hole 422 is equal to the outer diameter of the threaded segment of the bolt 700. A through hole 520 is provided on the cover plate 500, extending through the cover plate 500 along its thickness direction. The inner diameter of at least a portion of the inner wall of the through hole 520 is smaller than the outer diameter of the bolt head of the bolt 700. The bolt 700 can extend through the through hole 520 into the threaded hole 422 of the protrusion 440, and the bolt head can abut against the outer wall surface of the cover plate 500 or against the inner wall of the through hole 520. In one embodiment, the inner wall of the through hole 520 includes an internal thread, and the inner diameter of the internal thread in the through hole 520 is equal to the outer diameter of the threaded segment of the bolt 700.

[0096] This application uses bolts 700 to fix the protrusion 440 and the cover plate 500, which can achieve a fixed connection between the protrusion 440 and the cover plate 500, and makes installation more convenient. It also makes it easier to disassemble the cover plate 500 and the protrusion 440 to facilitate the maintenance of the components in the electrical control slot 410.

[0097] In one embodiment, see Figure 12 and Figure 13 As shown, Figure 13 A schematic diagram of the fixed assembly of bolts, cover plate, and housing is shown. The through hole 520 along the thickness direction of cover plate 500 includes two inner walls. The inner diameter of one inner wall of through hole 520 is larger than the inner diameter of the other inner wall and the outer diameter of bolt head 710 of bolt 700. The space enclosed by one inner wall is used to accommodate bolt head 710 of bolt 700. The threaded post 720 of bolt 700 is used to pass through the space enclosed by the other inner wall and extend into threaded hole 422.

[0098] In one embodiment, a countersunk hole is formed on the outer wall surface of the cover plate 500. The countersunk hole is divided into two sections to form a through hole 520 with two inner wall surfaces. The inner wall surface of the through hole 520 near the outer side of the cover plate 500 is the first inner wall surface 521, and the inner wall surface near the electrical control groove 410 is the second inner wall surface 522. The first inner wall surface 521 is one section of the inner wall of the through hole 520, and the second inner wall surface 522 is the other section of the inner wall of the through hole 520. The inner diameter of the space enclosed by the first inner wall surface 521 is larger than the inner diameter of the space enclosed by the second inner wall surface 522. The inner diameter of the space enclosed by the first inner wall surface 521 is equal to the outer diameter of the bolt head 710 of the bolt 700, and the inner diameter of the space enclosed by the second inner wall surface 522 is smaller than the outer diameter of the bolt head 710 of the bolt 700.

[0099] Along the through-hole 520, the length of the first inner wall surface 521 is greater than or equal to the height of the bolt head 710 of the bolt 700. After the bolt 700 passes through the through-hole 520 and is screwed into the threaded hole 422, the threaded post 720 of the bolt 700 passes through the space enclosed by the second inner wall surface 522 and enters the threaded hole 422. The internal thread of the threaded post 720 and the threaded hole 422 engages to fix the bolt 700 to the bottom wall of the cover plate 500 and the electrical control groove 410. The bolt head 710 can be completely recessed into the through-hole 520 and is stuck in the space enclosed by the first inner wall surface 521, preventing it from entering the space enclosed by the second inner wall surface 522, thus concealing the fixing bolt.

[0100] In one embodiment, see Figure 13 , Figure 14 and Figure 15 The above, Figure 14 A schematic diagram of a bolt structure is shown. Figure 15 A schematic diagram of an assembly of a rubber-coated bolt, a cover plate, and a housing is shown. The bolt 700 includes a rubber ring 730, which surrounds the outer circumferential surface of the bolt head 710 along the circumference of the bolt 700. Along the radial direction of the bolt 700, the inner diameter of the rubber ring 730 is equal to the outer diameter of the bolt head 710, and the outer diameter of the rubber ring 730 is equal to the inner diameter enclosed by a section of inner wall.

[0101] In one embodiment, a rubber ring 730 is wrapped around the outer peripheral surface of the bolt 700 to form a rubber-coated bolt. The material of the rubber ring 730 can be the same as that of the rubber strip 610, or it can be other rubber materials with damping effects. The rubber ring 730 surrounds the outer peripheral surface of the bolt head 710. Along the radial direction of the bolt 700, the inner diameter of the rubber ring 730 is equal to the outer diameter of the bolt head 710, and the rubber ring 730 tightly wraps around the bolt head 710. The outer diameter of the rubber ring 730 is equal to the inner diameter of a section of the inner wall, that is, the outer diameter of the rubber ring 730 is equal to the inner diameter of the space enclosed by the first inner wall surface 521. The rubber ring 730 can be tightly attached to the first inner wall surface 521. The rubber ring 730 is supported between the outer peripheral surface of the bolt head 710 and the first inner wall surface 521 to prevent the outer peripheral surface of the bolt head 710 from rigidly contacting the second inner wall surface and causing noise.

[0102] In one embodiment, see Figure 16 As shown, the length of the rubber ring 730 along the thickness direction of the cover plate 500 is greater than the length of the bolt head 710. Along the axial direction of the bolt 700, a portion of the rubber ring 730 is used to be located on one side of the bolt head 710 with the threaded rod. A portion of the rubber ring 730 is used to be spaced between the bolt head 710 and the inner wall of the through hole 520 along the axial direction of the bolt 700. A portion of the rubber ring 730 is connected to the inner wall of the bolt head 710 and the through hole 520 on both sides along the axial direction of the bolt 700, respectively.

[0103] In one embodiment, the length of the rubber ring 730 is greater than the length of the bolt head 710, and a portion of the rubber ring 730 extends to the side of the bolt head 710 facing the threaded post 720, and is located within the corner space between the bolt head 710 and the threaded post 720. When the bolt 700 passes through the through hole 520 and is screwed into the threaded hole 422, the bolt head 710 and the third inner wall surface 523 of the through hole 520 contact along the axial direction of the bolt 700, further preventing noise caused by hard contact between the bolt head 710 and the inner wall surface of the through hole 520. In one embodiment, the third inner wall surface 523 is located between the first inner wall surface 521 and the second inner wall surface 522, and the third inner wall surface 523 is parallel to the outer wall surface of the cover plate 500 for abutting against the bolt head 710.

[0104] In one embodiment, the other inner wall section includes an internal thread, the inner diameter of which is equal to the inner diameter of the thread in the threaded hole 422.

[0105] In one embodiment, the second inner wall surface 522 includes an internal thread, the inner diameter of which is equal to the inner diameter of the thread in the threaded hole 422 and equal to the outer diameter of the threaded post 720 of the bolt 700. The threaded post 720 of the bolt 700 is fixedly connected to the internal thread of the second inner wall surface 522 and the internal thread of the threaded hole 422, respectively, thereby improving the stability of the fixed connection between the bolt 700 and the bottom wall of the cover plate 500 and the electrical control groove 410.

[0106] In one embodiment, see Figure 13 As shown, the length of the other inner wall along the thickness direction of the cover plate 500 is greater than the height of the other protrusion 510. The length of the second inner wall surface 522 along the thickness direction of the cover plate 500 is greater than the height of the other protrusion 510. The second inner wall surface 522 can completely penetrate the other protrusion 510, so that the third inner wall surface 523 is not located in the other protrusion 510. The stepped hole is set on the body of the cover plate 500. When the bolt 700 fixes the inner wall of the cover plate 500 and the electrical control groove 410, the stress point of the cover plate 500 on the bolt head 710 is not on the other protrusion 510. Regardless of whether the other protrusion 510 and the body of the cover plate 500 are integrally formed, or the other protrusion 510 is fixed to the body of the cover plate 500 as an assembly by bolts or other structures, the inner wall of the through hole 520 has sufficient structural strength to support the bolt head 710.

[0107] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A power supply device characterized by comprising: The housing of the power supply device comprises an electric control groove for enclosing the electrical components of the motor controller with a cover plate, wherein: The housing of the power supply device comprises a protrusion in the electric control groove, the protrusion is distributed between at least two electrical components, the protrusion passes through the space between the two electrical components and connects the inner wall of the electric control groove and the cover plate respectively.

2. The power supply device according to claim 1, characterized by The motor controller comprises two circuit boards arranged in a direction perpendicular to the thickness of the cover plate, the protrusion is located between the two circuit boards, the two circuit boards are used to connect the two electrical components respectively, and the two ends of the protrusion in the thickness direction of the cover plate are connected to the cover plate and the bottom wall of the electric control groove respectively.

3. The power supply device according to claim 1 or 2, characterized by, The power supply device comprises a rubber strip between the protrusion and the cover plate, and the two sides of the rubber strip in the thickness direction of the cover plate are connected to the inner wall of the protrusion and the cover plate respectively.

4. The power supply device according to claim 3, wherein The width of the rubber strip in the direction perpendicular to the thickness of the cover plate is greater than the width of the protrusion, the rubber strip comprises at least two parts arranged in a direction perpendicular to the thickness of the cover plate, one part of the rubber strip is located on one side of the protrusion in the direction perpendicular to the thickness of the cover plate, and the other part of the rubber strip is located on one side of the protrusion in the thickness direction of the cover plate, the height of the one part of the rubber strip in the thickness direction of the cover plate is greater than the height of the other part of the rubber strip, and the height of the other part of the rubber strip in the thickness direction of the cover plate is equal to the distance between the protrusion and the cover plate.

5. The power supply device according to claim 1 or 2, characterized by The length of the protrusion in the direction perpendicular to the thickness of the cover plate is greater than the length of the motor controller, and the protrusion is used to separate the electric control groove into two accommodation spaces for accommodating the two electrical components respectively.

6. The power supply device according to claim 1 or 2, characterized by The height of the protrusion in the thickness direction of the cover plate is less than or equal to the depth of the electric control groove, and the cover plate comprises another protrusion fixedly connected to the protrusion in the thickness direction of the cover plate.

7. The power supply device according to claim 1 or 2, characterized by One end of the protrusion in the thickness direction of the cover plate comprises a flat surface for fixing and parallel to the inner wall of the cover plate.

8. The power supply device according to claim 1 or 2, characterized by The protrusion comprises a threaded hole, the cover plate comprises a through hole penetrating the cover plate in the thickness direction of the cover plate and opposite to the threaded hole, and the power supply device comprises a bolt penetrating the through hole and the threaded hole and fixedly connecting the protrusion and the cover plate.

9. The power supply device of claim 8, wherein, The through hole comprises two inner walls in the thickness direction of the cover plate, the inner diameter of one of the inner walls of the through hole is greater than the inner diameter of the other inner wall of the through hole and the outer diameter of the head of the bolt, and the space enclosed by the one inner wall is used to accommodate the head of the bolt, and the threaded column of the bolt penetrates the space enclosed by the other inner wall and extends into the threaded hole.

10. The power supply device of claim 9, wherein, The bolt comprises a rubber ring, the rubber ring is arranged around the outer circumferential surface of the bolt head along the circumferential direction of the bolt, the inner diameter of the rubber ring is equal to the outer diameter of the bolt head, and the outer diameter of the rubber ring is equal to the inner diameter of the inner wall.

11. The power supply device of claim 10, wherein, The length of the rubber ring along the thickness direction of the cover plate is greater than the length of the bolt head, and a part of the rubber ring is arranged on one side of the bolt head along the axial direction of the bolt, the part of the rubber ring is arranged between the bolt head and the part of the inner wall of the through hole along the axial direction of the bolt, and the part of the rubber ring is connected with the bolt head and the part of the inner wall of the through hole on both sides along the axial direction of the bolt.

12. The power supply device according to any one of claims 9 to 11, characterized by, The other inner wall comprises an inner thread, and the inner diameter of the inner thread of the other inner wall is equal to the inner diameter of the thread in the threaded hole.

13. A powertrain, characterized by, The power assembly comprises a housing, and the housing of the power assembly and the housing of the power supply device are integrated, the housing of the power assembly comprises at least one motor slot, the motor slot is used for enclosing the driving motor of the power assembly with another cover plate, and an electric control slot is arranged on one side of the motor slot in the radial direction.

14. The powertrain of claim 13, wherein, The one protrusion in the electric control slot extends in a direction perpendicular to the axial direction of the power assembly, the one protrusion is used for dividing the electric control slot into two accommodation spaces, the two accommodation spaces are arranged in the axial direction of the power assembly, and each of the accommodation spaces is used for accommodating one motor controller.

15. An electric vehicle characterized by comprising: The power assembly comprises a wheel and is used for driving the wheel.

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