Controller, dual-motor driving device and vehicle

Abstract

According to the controller, the dual-motor driving device and the vehicle provided by the utility model, the control circuit board, the shielding plate, the power module assembly and the second driving plate are stacked, and the capacitor assembly and at least one of the power module assembly, the control circuit board, the shielding plate and the second driving plate are arranged side by side, so that the number of stacked controllers is reduced; and the height size of the controller is reduced, so that the controller is more compact in structure and smaller in size.

Description

Technical Field

[0001] The utility model relates to the field of vehicle equipment, and mainly relates to a controller, a dual-motor driving device and a vehicle. Background Art

[0002] The dual-motor drive device includes a controller and two motors. The controller needs to be able to independently control the operation of the two motors. Therefore, the controller includes two power modules, two drive boards, a capacitor, a shielding plate and a control board. However, in the prior art, the arrangement structure between the power module, the drive board, the capacitor, the shielding plate and the control board is not compact enough, resulting in a larger overall size of the controller. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a controller, a dual-motor drive device and a vehicle to solve the problem of large size of the existing controller.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A controller includes a support frame, a power module assembly, a control circuit board, a shielding plate, a second drive board and a capacitor assembly; the power module assembly includes a first power module and a second power module, the first power module and the second power module are stacked; the control circuit board is stacked on the side of the first power module away from the second power module, and the control board is electrically connected to the first power module; the shielding plate is arranged between the first power module and the control circuit board; the second drive board is stacked on the side of the second power module away from the first power module, and the second drive board is electrically connected to the second power module and the control board; the capacitor assembly is arranged side by side with at least one of the power module assembly and the second drive board, and is electrically connected to the first power module and the second power module, and the support frame is fixedly connected to at least one of the power module assembly, the control circuit board, the shielding plate and the second drive board. Wherein, the control circuit board, the shielding plate, the power module assembly and the second drive board are stacked, and the capacitor assembly is arranged side by side with at least one of the power module assembly and the second drive board, so that the number of stacking of the controller is reduced, the height size of the controller is reduced, and the structure of the controller is more compact and the volume is smaller.

[0006] In some schemes of the present application, the capacitor assembly is arranged side by side with the control circuit board and the second drive board; the shielding plate is in the shape of a flat plate, and the projection of the shielding plate in the normal direction covers the capacitor assembly and the power module assembly, so that the structure composed of the power module assembly, the control circuit board, the shielding plate, the second drive board and the capacitor assembly is more compact.

[0007] In some schemes of the present application, the control circuit board includes a control board and a first drive board, the first drive board is electrically connected to the control board and the first power module, and the second drive board is electrically connected to the control board; the control board and the first drive board are arranged on the same plane, and the control board and the first drive board are integrated into one, making the structure more compact.

[0008] In some schemes of the present application, the edge position of the first driving board is opposite to the edge position of the first power module, and the edge position of the control board is opposite to the edge position of the capacitor assembly. The control board is arranged by making full use of the remaining position of the plane where the first driving board is located, so that the overall structure of the controller is more compact, and the wiring harness led out from the edge of the first driving board and connected to the first power module can be set shorter.

[0009] In some solutions of the present application, the power module assembly further includes a water-cooling plate, the water-cooling plate is fixedly connected to the support frame, and the water-cooling plate is stacked between the first power module and the second power module, and the first power module and the second power module are respectively arranged on two sides of the water-cooling plate; the water-cooling plate is provided with a water-cooling channel, and the water-cooling channel is used to cool the first power module and the second power module. By setting the water-cooling plate, the first power module and the second power module can be cooled at the same time, and the first power module and the second power module can be fixedly connected to the support frame through the water-cooling plate.

[0010] In some schemes of the present application, the water-cooling plate is in the shape of a flat plate, and the water-cooling plate includes a first side surface and a second side surface, the first side surface and the second side surface are relative to each other, and the areas of the first side surface and the second side surface are larger than the areas of other sides of the water-cooling plate; the first power module is fixed on the first side surface, and the second power module is fixed on the second side surface, so that while ensuring the cooling effect of the first power module and the second power module, the thickness of the water-cooling plate is reduced, thereby making the structure of the controller more compact and smaller in size.

[0011] In some schemes of the present application, the first power module is welded and connected to the first side, and the second power module is welded and connected to the second side; or the water-cooling plate is provided with a first window on the first side, and the water-cooling plate is provided with a second window on the second side, the first window and the second window are both connected to the water cooling channel, the first power module is sealed and connected to the first window, and the second power module is sealed and connected to the second window.

[0012] In some schemes of the present application, the support frame includes a base plate, which is located on the side of the capacitor assembly and the second driving plate away from the shielding plate, and the capacitor assembly is in contact with the base plate. A first cooling channel is provided on the base plate at a position corresponding to the capacitor assembly, and the first cooling channel is used to cool the capacitor assembly, thereby improving the cooling effect of the controller.

[0013] In some schemes of the present application, the support frame also includes a first flow channel column and a second flow channel column, the first flow channel column and the second flow channel column both protrude from the surface of the base plate, one end of the first flow channel column is connected to the water outlet end of the first cooling channel, and the other end is connected to the water inlet of the water cooling channel, and one end of the second flow channel column is connected to the water outlet of the water cooling channel, so that the water cooling channel and the first cooling channel form a series channel, which facilitates the pipe connection between the water cooling channel and the first cooling channel and the coolant providing device.

[0014] In some schemes of the present application, the second drive plate is fixed to the base plate; a second cooling channel is provided at a position of the base plate corresponding to the second drive plate, and the second cooling channel is used to cool the second drive plate. An end of the second flow channel column away from the water-cooled plate is connected to the water inlet end of the second cooling channel, thereby improving the cooling effect of the controller.

[0015] In some schemes of the present application, the controller also includes a first support column and a second support column, one end of the first support column is fixed to the base plate, and the other end is the free end of the first support column, the water-cooling plate is fixed to the free end of the first support column, and a first space for accommodating the second drive board and the second power module is formed between the water-cooling plate and the base plate, one end of the second support column is fixed to the base plate, and the other end is the free end of the second support column, the shielding plate is fixed to the free end of the second support column, and a second space for installing the second drive board, the power module assembly and the capacitor assembly is formed between the shielding plate and the base plate.

[0016] In some schemes of the present application, the capacitor assembly includes a capacitor and a filter, the input end of the filter is connected to an external three-phase electric wire, the output end of the filter is connected to the input end of the capacitor, and the output end of the capacitor is facing the power module assembly; the input ends of the first power module and the second power module are facing the output end of the capacitor, and both are electrically connected to the output end of the capacitor.

[0017] In some schemes of the present application, the capacitor is potted as one with the base plate, so that the volume of the capacitor and the base plate can be reduced, thereby reducing the overall volume of the controller; and / or the controller also includes a three-phase connector, the three-phase connector includes a first three-phase copper busbar and a second three-phase copper busbar, one end of the first three-phase copper busbar is connected to the output end of the first power module, and the other end is used to connect to the first motor of the dual-motor drive device, one end of the second three-phase copper busbar is connected to the output end of the second power module, and the other end is used to connect to the second motor of the dual-motor drive device; the first three-phase copper busbar is at least partially in contact with the side of the base plate facing away from the second drive board, and the second three-phase copper busbar is at least partially in contact with the side of the base plate facing away from the second drive board, so that the coolant inside the base plate can cool the first three-phase copper busbar and the second three-phase copper busbar.

[0018] A dual-motor drive device comprises a shell, a motor, a controller and an electrical connector; a motor mounting cavity and a controller mounting cavity are formed on the shell, and a water inlet channel and a water outlet channel are provided on the shell; the motor comprises a first motor and a second motor, and the first motor and the second motor are both installed in the motor mounting cavity; the controller is installed in the controller mounting cavity, the water inlet end of the first cooling channel is connected to the water inlet channel, and the water outlet end of the second cooling channel is connected to the water outlet channel; the electrical connector comprises a first electrical connector and a second electrical connector, the first electrical connector is arranged between the first motor and the controller, and is electrically connected to the first power module of the first motor and the controller, and the second electrical connector is arranged between the second motor and the controller, and is electrically connected to the second motor and the second power module of the controller.

[0019] A vehicle comprises a vehicle body, wheels and a dual-motor drive device, wherein the dual-motor drive device is fixed on the vehicle body, and the wheels are drivingly connected to the motors.

[0020] Beneficial effect: In the controller of the present application, the control circuit board, the shielding plate, the power module assembly and the second driving board are stacked, and the capacitor assembly is arranged side by side with at least one of the power module assembly, the control circuit board, the shielding plate and the second driving board, so that the number of stacking layers of the controller is reduced, the height size of the controller is reduced, and the structure of the controller is more compact and the volume is smaller.

[0021] The dual-motor drive device of the present application includes a housing, a motor, an electrical connector and the above-mentioned controller, wherein the controller is smaller in size and can be more conveniently arranged on the housing of the dual-motor drive device. That is to say, the controller installation cavity for installing the controller can be set smaller, making the dual-motor drive device more compact and smaller in size.

[0022] The vehicle of the present application includes the above-mentioned dual-motor drive device, which makes the overall structure of the vehicle more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of a dual-motor driving device in one embodiment.

[0024] Figure 2 yes Figure 1 Schematic diagram of the explosion after removing the end cover and cover plate.

[0025] Figure 3 It is a schematic structural diagram of a motor and electronic control housing in one embodiment.

[0026] Figure 4 It is a schematic diagram of the structure of a controller in one embodiment.

[0027] Figure 5 yes Figure 4 The controller shown is a schematic diagram of the structure when looking up.

[0028] Figure 6 yes Figure 4 The exploded view of the controller is shown with the metal cover removed.

[0029] Figure 7 This is a diagram showing the positional relationship between the capacitor components and the power module components.

[0030] Figure 8 is a schematic diagram of the structure of a bracket in an embodiment, wherein the dotted line indicates the positions of the first cooling channel and the second cooling channel.

[0031] Main component symbol description: 1-support frame; 11-bottom plate; 111-first cooling channel; 12-first flow channel column; 13-second flow channel column; 112-second cooling channel; 14-first support column; 15-second support column; 2-power module assembly; 21-first power module; 23-water cooling plate; 3-control circuit board; 31-control board; 32-first drive board; 4-shielding plate; 5-second drive board; 6-capacitor assembly; 61-capacitor; 62-filter; 63-busbar copper bar; 7-three-phase connector; 71-first Three-phase copper busbar; 72-second three-phase copper busbar; 73-first connection part, 74-second connection part, 75-third connection part; 8-metal cover plate; 9-connecting copper busbar; 10-controller; 20-housing; 201-motor installation cavity; 202-controller installation cavity; 203-water inlet channel; 204-water outlet channel; 205-motor and electronic control housing; 206-end cover; 207-cover plate; 30-motor; 301-first motor; 302-second motor; 40-electrical connector; 401-first electrical connector; 402-second electrical connector. DETAILED DESCRIPTION

[0032] The utility model provides a controller, a dual-motor drive device and a vehicle. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] A vehicle comprises a vehicle body, wheels and a dual-motor drive device, wherein the dual-motor drive device is fixed on the vehicle body, and the wheels are drivingly connected to the motors, so that the vehicle moves under the drive of the motors of the dual-motor drive device.

[0036] See also Figure 1-3 The dual-motor drive device includes a housing 20, a motor 30, a controller 10, and an electrical connector 40. The housing 20 is formed with a motor installation cavity 201 and a controller installation cavity 202, the controller 10 is installed in the controller installation cavity 202, the motor 30 includes a first motor 301 and a second motor 302, both of which are installed in the motor installation cavity 201, and the electrical connector 40 includes a first electrical connector 401 and a second electrical connector 402, the first electrical connector 401 is arranged between the first motor 301 and the controller 10, and is electrically connected to the first motor 301 and the controller 10, the second electrical connector 402 is arranged between the second motor 302 and the controller 10, and is electrically connected to the second motor 302 and the controller 10, so that the controller 10 can control the first motor 301 and the second motor 302 to work respectively. Among them, the electrical connector 40 is preferably a copper busbar, but it can also be other conductive structures.

[0037] exist Figure 1 and Figure 2 In the illustrated embodiment, the motor mounting cavity 201 includes a first motor mounting cavity and a second motor mounting cavity, the first motor mounting cavity and the second motor mounting cavity are coaxially arranged, the first motor 301 is installed in the first motor mounting cavity, the second motor 302 is installed in the second motor mounting cavity, and the controller mounting cavity 202 is arranged on one side of the circumference of the first motor mounting cavity and the second motor mounting cavity, so that the distance between the first motor 301 and the controller 10 and the distance between the second motor 302 and the controller 10 are shortened, that is, the total length of the first electrical connector 401 and the second electrical connector 402 is shortened.

[0038] In one embodiment, the wheel includes a first wheel end and a second wheel end, the first wheel end is transmission-connected to the first motor 301, and the second wheel end is transmission-connected to the second motor 302, so that the first motor 301 and the second motor 302 respectively drive the two wheel ends (i.e., the first wheel end and the second wheel end) to rotate, that is, the first wheel end and the second wheel end are independently driven by the first motor 301 and the second motor 302 respectively, forming a distributed dual-motor drive device.

[0039] In one embodiment, the wheel includes a first wheel end and a second wheel end, and the first motor 301 and the second motor 302 are simultaneously connected to the first wheel end and the second wheel end in driving connection. For example, the first wheel end and the second wheel end are respectively connected to two output half shafts of the differential, and the first motor 301 and the second motor 302 are both connected to the differential, so that one or both of the first motor 301 and the second motor 302 simultaneously drive the first wheel end and the second wheel end to rotate, forming a dual-motor electric drive device.

[0040] In one embodiment, the housing 20 includes a motor and electronic control housing 205, an end cover 206 and a cover plate 207. The motor mounting cavity 201 and the controller mounting cavity 202 are both arranged on the motor and electronic control housing 205. The end cover 206 is fixed to the end of the motor and electronic control housing 205 to seal the opening of the motor mounting cavity 201. The cover plate 207 is fixed to the motor and electronic control housing 205 to seal the opening of the controller mounting cavity 202.

[0041] In one embodiment, a reducer is further provided between the end cover 206 and the motor electronic control housing 205 , the reducer is connected to the output end of the motor 30 , and the motor 30 is transmission-connected to the wheel end via the reducer.

[0042] See also Figure 4-Figure 7 The controller 10 includes a support frame 1, a power module assembly 2, a control circuit board 3, a shielding plate 4, a second drive board 5 and a capacitor assembly 6. The support frame 1 is fixedly connected to the housing 20, and at least one of the power module assembly 2, the control circuit board 3, the shielding plate 4 and the second drive board 5 is fixed on the support frame 1. The power module assembly 2 includes a first power module 21 and a second power module (in Figure 6 and Figure 7 In the illustrated embodiment, the second power module is located on the side of the water-cooled plate 23 facing away from the first power module 21), and the first power module 21 and the second power module are stacked. The control circuit board 3 is stacked on the side of the first power module 21 facing away from the second power module, and the control circuit board 3 is electrically connected to the first power module 21. The shielding plate 4 is stacked between the first power module 21 and the control circuit board 3, and the second drive board 5 is stacked on the side of the second power module facing away from the first power module 21. The second drive board 5 is located on the side of the shielding plate 4 facing away from the control circuit board 3, and the second drive board 5 is electrically connected to both the second power module and the control board 31. The capacitor assembly 6 is electrically connected to the first power module 21 and the second power module, and is arranged side by side with at least one of the power module assembly 2 and the second drive board 5.

[0043] Among them, stacking means setting in the up-down (Z axis) direction, and the projections in the Z direction overlap. Side-by-side arrangement means setting in the left-right (X axis) or front-back (Y axis) direction, and the projections in the left-right or front-back direction overlap.

[0044] In the above, by stacking the first power module 21 and the second power module up and down, the size of the power module assembly 2 in the width direction of the controller 10 is reduced without increasing the size in the height direction too much, and the height dimension of the capacitor assembly 6 is larger than the height dimension of the second power module. The present application arranges the capacitor assembly 6 side by side with at least one of the power module assembly 2 and the second drive board 5, relative to the technical solution in which the power module assembly 2, the drive board, the shielding board 4, the control board and the capacitor are all stacked, thereby reducing the number of stacked component layers and reducing the height dimension of the controller 10.

[0045] In one embodiment, the height dimension of the capacitor assembly 6 is close to or equal to the sum of the height dimension of the power module assembly 2 and the height dimension of the second drive board 5. By arranging the capacitor assembly 6 side by side with the power module assembly 2 and the second drive board 5, relative to the technical solution of arranging the first power module 21 and the second power module side by side, the width space of one of the power modules when the two power modules are arranged side by side is utilized to arrange the capacitor assembly 6, so that the capacitor assembly 6, the power module assembly 2 and the second drive board 5 are arranged side by side without substantially increasing the width dimension of the controller 10. Here, "close" means "slightly equal". For example, if the difference between the height of the power module assembly 2 and the second drive board 5 after stacking and the thickness of the capacitor assembly 6 is within the range of ±10 mm, then the height of the power module assembly 2 and the second drive board 5 after stacking is close to the thickness of the capacitor assembly 6.

[0046] In this embodiment, the second drive board 5 and the control circuit board 3 are separately arranged so that the height dimension of the second drive board 5 and the power module assembly 2 after stacking is close to or equal to the height dimension of the capacitor assembly 6, thereby making the overall structure of the controller 10 more compact.

[0047] The control circuit board 3 includes a control board 31 and a first drive board 32. The control board 31 and the first drive board 32 are arranged on the same plane and integrated into one body. The first drive board 32 is electrically connected to the control board 31 and the first power module 21, and the second drive board 5 is electrically connected to the control board 31. The high-voltage alternating current flows to the first power module 21 and the second power module after being regulated by the capacitor assembly 6. The first power module 21 is electrically connected to the first motor 301 through the first electrical connector 401, and the second power module is electrically connected to the second motor 302 through the second electrical connector 402. The control circuit board 3 is electrically connected to the first power module 21, and is electrically connected to the second power module through the second drive board 5, so that the control circuit board 3 can control the operation of the first power module 21 and the second power module, and realize the control of the first motor 301 and the second motor 302.

[0048] Among them, the control board 31 and the first drive board 32 are integrated into one, so that the structure of the control board 31 and the first drive board 32 is more compact, reducing the space required for installing the control board 31 and the first drive board 32, and further reducing the overall volume of the controller 10.

[0049] In the above, the second drive board 5, the second power module, the first power module 21, the shielding plate 4 and the control circuit board 3 are stacked so that the second drive board 5 is close to the second power module, which facilitates the electrical connection between the second drive board 5 and the second power module, and the first power module 21 is close to the control circuit board 3, which facilitates the electrical connection between the first power module 21 and the control circuit board 3, making the overall structure of the controller 10 more compact and reducing the volume of the controller 10. The shielding plate 4 is arranged between the first power module 21 and the control circuit board 3, which can prevent the high voltage current of the first power module 21 from interfering with the signal of the control circuit board 3.

[0050] When the controller 10 is installed on the housing 20, the support frame 1 is fixedly connected to the housing 20 to fix the entire controller 10 on the housing 20, and the control circuit board 3 is arranged on the opening side of the controller installation cavity 202 to facilitate maintenance of the control board 31.

[0051] In one embodiment, the shielding plate 4 is in the shape of a flat plate, and the projection of the shielding plate 4 in the normal direction covers the capacitor component 6 and the power module component 2. The normal direction is the direction in which the control circuit board 3, the shielding plate 4, the power module component 2 and the second driving board 5 are stacked. That is, after the capacitor component 6 and the power module component 2 are installed, their edges are less than or equal to the edges of the shielding plate 4, and the edges of the control circuit board 3 are less than or equal to the edges of the shielding plate 4, so that the shielding plate 4 can completely shield the magnetic fields of the capacitor component 6 and the power module component 2, thereby preventing the magnetic fields of the capacitor component 6 and the power module component 2 from interfering with the control circuit board 3.

[0052] In a preferred embodiment, the structural edges of the plane where the capacitor assembly 6 and the power module assembly 2 are located, the edge of the shielding plate 4 and the edge of the control circuit board 3 are directly opposite, so that the overall structure of the controller 10 is more compact.

[0053] In a preferred embodiment, the edge position of the first driving board 32 is opposite to the edge position of the first power module 21, so that when the wiring harness is led out from the edge position of the first driving board 32 to connect the first power module 21, the length of the wiring harness between the first driving board 32 and the first power module 21 can be shortened.

[0054] In a preferred embodiment, the edge of the control board 31 is opposite to the edge of the capacitor assembly 6, so that the remaining space of the plane where the first drive board 32 is located can be fully utilized to arrange the control board 31, thereby making the overall structure of the controller 10 compact.

[0055] Preferably, the edges of the first drive board 32, the edges of the first power module 21, the edges of the second power module and the edges of the second drive board 5 are all facing each other, and the wiring harness connecting the second drive board 5 and the control board 31 is arranged at a position of the control board 31 close to the first drive board 32, so that the length of the wiring harness between the control board 31 and the second drive board 5 is shortened, and the wiring harness connecting the control board 31 and the second drive board 5 and the wiring harness connecting the first drive board 32 and the first power module 21 can be integrated together to reduce the space required for wiring.

[0056] The power module assembly 2 also includes a water-cooling plate 23, which is fixedly connected to the support frame 1, and the water-cooling plate 23 is located between the first power module 21 and the second power module. The first power module 21 and the second power module are respectively arranged on two sides of the water-cooling plate 23, so that the first power module 21 and the second power module are fixedly connected to the support frame 1 through the water-cooling plate 23.

[0057] The water cooling plate 23 is provided with a water cooling channel, which is used to cool the first power module 21 and the second power module. When there is a flowing coolant in the water cooling channel, the heat generated by the operation of the first power module 21 and the second power module is transferred to the coolant through the water cooling plate 23, and is taken out of the controller 10 by the coolant, so as to cool down the controller 10. Among them, since the first power module 21 and the second power module are respectively arranged on two sides of the water cooling plate 23, the first power module 21 and the second power module can be cooled at the same time, reducing the temperature difference between the first power module 21 and the second power module, so that the cooling effect is better.

[0058] The water-cooling plate 23 is in a flat plate shape, and includes a first side surface and a second side surface, the first side surface and the second side surface are opposite to each other, and the areas of the first side surface and the second side surface are larger than the areas of the other sides of the water-cooling plate 23. The first power module 21 is fixed on the first side surface, and the second power module is fixed on the second side surface, so that the thickness of the water-cooling plate 23 is reduced on the basis of ensuring the installation area and cooling effect of the first power module 21 and the second power module, so that the structure of the power module assembly 2 is more compact.

[0059] In one embodiment, the first power module 21 is welded to the first side, and the second power module is welded to the second side, so that the connection between the first power module 21, the second power module and the water cooling plate 23 is convenient, and the water cooling plate 23 does not need to be additionally provided with a structure for fixing the first power module 21 and the second power module, so that the structure of the water cooling plate 23 is simple and the volume is small.

[0060] In one embodiment, the water-cooled plate 23 is provided with a first window on the first side, the first window is connected to the water-cooled channel, and the first power module 21 is sealed and connected to the first window, so that the first power module 21 can contact with the coolant, improve the heat transfer efficiency between the first power module 21 and the coolant, and improve the cooling effect. Wherein, the first power module 21 can be fixed on the first side of the water-cooled plate 23 by screws, the first side is provided with a sealing ring at the first window, and the first power module 21 abuts against the sealing ring to achieve a sealed connection between the first power module 21 and the first window. Similarly, the water-cooled plate 23 is provided with a second window on the second side, the second window is connected to the water-cooled channel, and the second power module is sealed and connected to the second window, so that the second power module can contact with the coolant, improve the heat transfer efficiency between the second power module and the coolant, and improve the cooling effect. Wherein, the second power module can be fixed on the second side of the water-cooled plate 23 by screws, the second side is provided with a sealing ring at the second window, and the second power module abuts against the sealing ring to achieve a sealed connection between the second power module and the second window.

[0061] See also Figure 8The support frame 1 includes a bottom plate 11, a first support column 14 and a second support column 15. The bottom plate 11 is located on the side of the capacitor assembly 6 and the second drive plate 5 away from the shielding plate 4. The bottom plate 11 is fixedly connected to the housing 20. One end of the first support column 14 is fixed to the bottom plate 11, and the other end is the free end of the first support column 14. The water-cooling plate 23 is fixed to the free end of the first support column 14. A first space for accommodating the second drive plate 5 and the second power module is formed between the water-cooling plate 23 and the bottom plate 11. Similarly, one end of the second support column 15 is fixed to the bottom plate 11, and the other end is the free end of the second support column 15. The shielding plate 4 is fixed to the free end of the second support column 15. A second space for installing the second drive plate 5 and the power module assembly 2 is formed between the shielding plate 4 and the bottom plate 11.

[0062] The first support column 14 and the second support column 15 are both protruded from the same side surface of the bottom plate 11 , and the length of the second support column 15 along the axial direction is greater than that of the first support column 14 , so the second space includes the first space.

[0063] In one embodiment, the bottom plate 11, the first support column 14 and the second support column 15 are integrally formed, so as to facilitate production and reduce costs.

[0064] In one embodiment, the support frame 1 further includes a skirt, which is connected to the bottom plate 11 and protrudes from the surface of the bottom plate 11, so that the support frame 1 forms a shell structure with at least one side open. In other embodiments, the support frame 1 may not be provided with a skirt, so that the volume of the support frame 1 can be reduced, the connection and wiring of the wire harness can be facilitated, and the overall volume of the controller 10 can be smaller and the cost can be lowered.

[0065] In one embodiment, a first cooling channel 111 is provided at a position of the bottom plate 11 corresponding to the capacitor assembly 6, and the first cooling channel 111 is used to cool the capacitor assembly 6. The capacitor assembly 6 is fitted to the bottom plate 11 to avoid a gap between the capacitor assembly 6 and the bottom plate 11, thereby reducing the heat transfer efficiency of the capacitor assembly 6 to the bottom plate 11 and affecting the cooling effect of the capacitor assembly 6.

[0066] See also Figure 6-Figure 8 In one embodiment, the capacitor assembly 6 includes a capacitor 61 and a filter 62, the input end of the filter 62 is connected to an external three-phase wire, the output end of the filter 62 is connected to the input end of the capacitor 61, and the output end of the capacitor 61 is toward the power module assembly 2; the input ends of the first power module 21 and the second power module are toward the output end of the capacitor 61, and are both electrically connected to the output end of the capacitor 61, thereby shortening the electrical connection distance between the first power module 21 and the second power module and the capacitor 61, making the structure more compact.

[0067] exist Figure 7In the illustrated embodiment, the capacitor 61 and the filter 62 form an L shape, and the position of the first cooling channel 111 corresponds to the position of the capacitor 61, that is, the first cooling channel 111 is only used to cool the capacitor 61. The filter 62 is provided with a busbar copper bar 63 at one end away from the capacitor 61, and the busbar copper bar 63 is used to connect to a high-voltage AC power source.

[0068] In one embodiment, the capacitor 61 and the base plate 11 are potted as one, eliminating the connector, thereby further reducing the volume of the controller 10. Moreover, the capacitor 61 and the base plate 11 are fixed together by potting, so that the capacitor 61 and the base plate 11 fit better, thereby improving the cooling effect of the capacitor 61.

[0069] In one embodiment, the second driving board 5 is fixed on the bottom plate 11 , and a second cooling channel 112 is provided at a position of the bottom plate 11 corresponding to the second driving board 5 . The second cooling channel 112 is used to cool the second driving board 5 , thereby improving the overall heat dissipation effect of the controller 10 .

[0070] The support frame 1 also includes a first flow channel column 12 and a second flow channel column 13, both of which protrude from the surface of the base plate 11, one end of the first flow channel column 12 is connected to the water outlet end of the first cooling channel 111, and the other end is connected to the water inlet of the water cooling channel, one end of the second flow channel column 13 is connected to the water outlet of the water cooling channel, and the end of the second flow channel column 13 away from the water cooling plate 23 is connected to the water inlet end of the second cooling channel 112, so that the first cooling channel 111, the water cooling channel and the second cooling channel 112 form a series structure, which facilitates the connection between the first cooling channel 111, the water cooling channel and the second cooling channel 112 and the water tank providing the coolant, and simplifies the pipeline connection structure.

[0071] Preferably, the second driving plate 5 is in contact with the bottom plate 11 to improve the cooling effect on the second driving plate 5 .

[0072] In one embodiment, a water inlet channel 203 and a water outlet channel 204 are formed on the shell 20, the water inlet end of the first cooling channel 111 is connected to the water inlet channel 203, the water outlet end of the second cooling channel 112 is connected to the water outlet channel 204, the water inlet end of the water inlet channel 203 is connected to a water tank, and the water outlet end of the water outlet channel 204 is connected to the water tank, so that the water tank, the water inlet channel 203, the first cooling channel 111, the water cooling channel, the second cooling channel 112 and the water outlet channel 204 are connected in sequence to form a cooling circulation channel.

[0073] Among them, the outer shell 20 is provided with a partition between the motor installation cavity 201 and the controller installation cavity 202, and the water inlet channel 203 and the water outlet channel 204 are arranged on the partition, and the water inlet of the first cooling channel 111 and the water outlet of the second cooling channel 112 are both arranged on the side of the bottom plate 11 away from the water cooling plate 23, so that the water inlet end of the first cooling channel 111 and the water outlet end of the second cooling channel 112 can correspond to the positions of the water inlet channel 203 and the water outlet channel 204 respectively, which facilitates the connection between the water inlet end of the first cooling channel 111 and the water inlet channel 203 and the connection between the water outlet end of the second cooling channel 112 and the water outlet channel 204.

[0074] In the structure of the controller 10, high voltage alternating current flows through the capacitor assembly 6 and the power module assembly 2, so heat is easily generated. By providing a first cooling channel 111 and a second cooling channel 112 on the base plate 11, and providing a water cooling plate 23 on the power module assembly 2, the heat dissipation effect of the capacitor assembly 6 and the power module assembly 2 is improved.

[0075] In the dual-motor drive device, the working temperatures of the first motor 301 and the second motor 302 are relatively high, that is, the working temperatures of the first motor 301 and the second motor 302 are higher than the working temperature of the controller 10. After the controller 10 is installed on the housing 20, the base plate 11 of the controller 10 is close to the first motor 301 and the second motor 302. By arranging the first cooling channel 111 and the second cooling channel 112 on the base plate 11, the heat transferred from the first motor 301 and the second motor 302 to the controller 10 can be quickly discharged, thereby preventing the controller 10 from being burned out due to excessive temperature.

[0076] In the present application, using water as the coolant is only a preferred solution, but the coolant is not limited to water, and can also be other media, such as oil.

[0077] The controller 10 also includes a three-phase connector 7, which includes a first three-phase copper busbar 71 and a second three-phase copper busbar 72. One end of the first three-phase copper busbar 71 is connected to the output end of the first power module 21, and the other end is connected to the first motor 301 of the dual-motor drive device through the first electrical connector 401. One end of the second three-phase copper busbar 72 is connected to the output end of the second power module, and the other end is connected to the second motor 302 of the dual-motor drive device through the second electrical connector 402.

[0078] The first three-phase copper bar 71 is at least partially attached to the side of the bottom plate 11 away from the second drive plate 5, so that the coolant in the bottom plate 11 can cool the first three-phase copper bar 71. Similarly, the second three-phase copper bar 72 is at least partially attached to the side of the bottom plate 11 away from the second drive plate 5, so that the coolant in the bottom plate 11 can cool the second three-phase copper bar 72.

[0079] exist Figure 6 In the illustrated embodiment, the first three-phase copper busbar 71 includes a first connection segment, a second connection segment and a third connection segment, which are connected in sequence, and the second three-phase copper busbar 72 includes a fourth connection segment, a fifth connection segment and a sixth connection segment, which are connected in sequence.

[0080] The first connection section and the fourth connection section are arranged at intervals and fixed together by insulating materials to form a first connection portion 73. The first connection portion 73 is generally in the shape of a plate, and the large surface of the first connection portion 73 is in contact with the bottom plate 11, which increases the contact area between the first connection portion 73 and the bottom plate 11 and improves the cooling effect of the first three-phase copper busbar 71 and the second three-phase copper busbar 72. Among them, the first connection section is connected to the first electrical connector 401, and the fourth connection section is connected to the second electrical connector 402.

[0081] The third connection segment and the sixth connection segment are arranged at intervals and fixed together by insulating material to form a third connection portion 75. The third connection portion 75 is arranged corresponding to the output end of the first power module 21 and the output end of the second power module, and the third connection segment is connected to the output end of the first power module 21, and the sixth connection segment is connected to the output end of the second power module.

[0082] The second connection section and the fifth connection section are arranged at intervals and fixed together by insulating materials to form a second connection portion 74. The second connection portion 74 is arranged between the first connection portion 73 and the third connection portion 75, and the second connection section connects the first connection section and the third connection section, and the fifth connection section connects the fourth connection section and the sixth connection section. The second connection portion 74 is flat, so that the size of the second connection portion 74 in the front-to-back direction of the controller 10 is reduced, thereby making the structure of the controller 10 more compact.

[0083] In one embodiment, the controller 10 is provided with a metal cover plate 8 above the second connection portion 74, and the metal cover plate 8 is used to shield the magnetic field generated when the first three-phase copper busbar 71 and the second three-phase copper busbar 72 are conductive, so as to avoid signal interference to the operation of the control circuit board 3. In the embodiment, the metal cover plate 8 and the shielding plate 4 are set as an integral structure.

[0084] In one embodiment, the controller 10 further includes a connecting copper busbar 9 , and the output end of the capacitor 61 and the input end of the first power module 21 as well as the output end of the capacitor 61 and the input end of the second power module are both connected via the connecting copper busbar 9 .

[0085] In one embodiment, the controller 10 also includes a current sensor, which is electrically connected to the driving board. The first three-phase copper busbar 71 and the second three-phase copper busbar 72 are both provided with current sensors, and the current sensors are used to detect the current on the first three-phase copper busbar 71 and the second three-phase copper busbar 72.

[0086] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A controller, characterized in that: include: A power module assembly includes a first power module and a second power module, wherein the first power module and the second power module are stacked; A control circuit board, stacked and arranged on a side of the first power module away from the second power module, the control circuit board being electrically connected to the first power module; A shielding plate, stacked between the first power module and the control circuit board; A second driving board, stacked and arranged on a side of the second power module away from the first power module, the second driving board being electrically connected to the second power module and the control circuit board; a capacitor assembly, arranged side by side with at least one of the power module assembly and the second driving board, and electrically connected to the first power module and the second power module; The support frame is fixedly connected to at least one of the power module assembly, the control circuit board, the shielding plate and the second driving board.

2. The controller according to claim 1, characterized in that: The capacitor assembly is arranged side by side with the power module assembly and the second driving board; The shielding plate is in a flat plate shape, and the projection of the shielding plate in the normal direction covers the capacitor component and the power module component.

3. The controller according to claim 2, characterized in that: The control circuit board includes a control board and a first drive board, the first drive board is electrically connected to the control board and the first power module, and the second drive board is electrically connected to the control board; The control board and the first driving board are arranged on the same plane, and the control board and the first driving board are integrated into one body.

4. The controller according to claim 3, characterized in that: The first driving board is located opposite to the first power module, and the control board is located opposite to the capacitor assembly.

5. The controller according to any one of claims 1 to 4, characterized in that: The power module assembly further includes a water cooling plate, which is fixedly connected to the support frame and is stacked between the first power module and the second power module, and the first power module and the second power module are respectively arranged on two sides of the water cooling plate; The water cooling plate is provided with a water cooling channel, and the water cooling channel is used to cool the first power module and the second power module.

6. The controller according to claim 5, characterized in that: The water-cooling plate is in a flat plate shape, and includes a first side surface and a second side surface, the first side surface and the second side surface are opposite to each other, and the areas of the first side surface and the second side surface are larger than the areas of other sides of the water-cooling plate; The first power module is fixed on the first side surface, and the second power module is fixed on the second side surface.

7. The controller according to claim 6, characterized in that: The first power module is welded to the first side surface, and the second power module is welded to the second side surface; or The water-cooling plate has a first window on the first side, and a second window on the second side. The first window and the second window are both connected to the water-cooling channel. The first power module is sealed and connected to the first window, and the second power module is sealed and connected to the second window.

8. The controller according to claim 5, characterized in that: The support frame includes a base plate, which is located on the side of the capacitor assembly and the second driving plate away from the shielding plate, and the capacitor assembly is in contact with the base plate. The base plate is provided with a first cooling channel at a position corresponding to the capacitor assembly, and the first cooling channel is used to cool the capacitor assembly.

9. The controller according to claim 8, characterized in that: The support frame also includes a first flow channel column and a second flow channel column, both of which protrude from the surface of the base plate, one end of the first flow channel column is connected to the water outlet end of the first cooling channel, and the other end is connected to the water inlet of the water cooling channel, and one end of the second flow channel column is connected to the water outlet of the water cooling channel.

10. The controller according to claim 9, characterized in that: The second driving plate is fixed to the bottom plate; A second cooling channel is provided at a position of the bottom plate corresponding to the second driving plate, and the second cooling channel is used to cool the second driving plate. One end of the second flow channel column away from the water cooling plate is connected to the water inlet end of the second cooling channel.

11. The controller according to claim 8, characterized in that: The controller also includes a first support column and a second support column, one end of the first support column is fixed to the base plate, and the other end is the free end of the first support column, the water-cooling plate is fixed to the free end of the first support column, and a first space for accommodating the second drive board and the second power module is formed between the water-cooling plate and the base plate, one end of the second support column is fixed to the base plate, and the other end is the free end of the second support column, the shielding plate is fixed to the free end of the second support column, and a second space for installing the second drive board, the power module assembly and the capacitor assembly is formed between the shielding plate and the base plate.

12. The controller according to claim 8, characterized in that: The capacitor assembly includes a capacitor and a filter, the input end of the filter is connected to an external three-phase wire, the output end of the filter is connected to the input end of the capacitor, and the output end of the capacitor faces the power module assembly; The input ends of the first power module and the second power module face the output end of the capacitor, and are both electrically connected to the output end of the capacitor.

13. The controller according to claim 12, characterized in that: The capacitor is potted integrally with the base plate; and / or The controller also includes a three-phase connector, which includes a first three-phase copper bar and a second three-phase copper bar, one end of the first three-phase copper bar is connected to the output end of the first power module, and the other end is used to connect to the first motor of the dual-motor drive device, one end of the second three-phase copper bar is connected to the output end of the second power module, and the other end is used to connect to the second motor of the dual-motor drive device; the first three-phase copper bar is at least partially attached to the side of the bottom plate away from the second drive board, and the second three-phase copper bar is at least partially attached to the side of the bottom plate away from the second drive board.

14. A dual-motor drive device, characterized in that: include: The housing is formed with a motor installation cavity and a controller installation cavity, and the housing is provided with a water inlet channel and a water outlet channel; The motor comprises a first motor and a second motor, wherein the first motor and the second motor are both installed in the motor installation cavity; The controller according to claim 10 is installed in the controller installation cavity, the water inlet end of the first cooling channel is connected to the water inlet channel, and the water outlet end of the second cooling channel is connected to the water outlet channel; The electrical connector includes a first electrical connector and a second electrical connector, wherein the first electrical connector is arranged between the first motor and the controller and is electrically connected to the first motor and the first power module of the controller, and the second electrical connector is arranged between the second motor and the controller and is electrically connected to the second motor and the second power module of the controller.

15. A vehicle, characterized in that: It comprises a vehicle body, wheels and the dual-motor drive device as claimed in claim 14, wherein the dual-motor drive device is fixed on the vehicle body, and the wheels are drivingly connected to the motors.

Images