Water-cooling heat dissipation vehicle-mounted device and electric vehicle

Abstract

The utility model provides a water-cooling heat dissipation vehicle-mounted device and an electric vehicle. The housing of the vehicle-mounted device comprises an integrated housing and an electric cover plate. The integrated shell comprises an electrical containing groove used for containing at least one of a vehicle-mounted charger or a motor controller. The electrical cover plate is used for enclosing the electrical accommodating groove. The integrated shell comprises a shell water channel inlet, the electric cover plate comprises a cover plate water channel inlet, a cover plate internal flow channel and a cover plate water channel outlet, and the cover plate internal flow channel is used for receiving cooling water through the cover plate water channel inlet and conveying the cooling water to the shell water channel inlet through the cover plate water channel outlet. The shell water channel inlet is distributed on the outer side of the electrical containing groove, and the cover plate water channel inlet and the cover plate water channel outlet are distributed on the side, facing the electrical containing groove, of the electrical cover plate. And the orientation of the notch of the electrical accommodating groove is opposite to that of the water channel inlet of the cover plate and is the same as that of the water channel inlet of the shell. According to the vehicle-mounted device, the cooling water flow channel is integrated on the electric cover plate, so that the integration level is improved, and miniaturization is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to a water-cooled and heat-dissipated vehicle-mounted device and an electric vehicle. BACKGROUND

[0002] The vehicle-mounted device is used for integrating a vehicle-mounted charger or a motor controller. The vehicle-mounted charger is used for receiving a high-voltage charging current to charge a power battery and for receiving a power battery current to supply power to the remaining electrical components on the vehicle. The motor controller is used for receiving power battery power supply and for driving a drive motor. The vehicle-mounted charger and the motor controller generate a large amount of heat during operation, and the vehicle-mounted device needs to improve the heat dissipation capacity without affecting the overall volume to ensure reliable operation of the vehicle-mounted device. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a water-cooled and heat-dissipated vehicle-mounted device and an electric vehicle. The vehicle-mounted device integrates a cooling water flow channel on an electrical cover plate to compress the volume, which is conducive to improving the integration and miniaturization of the vehicle-mounted device.

[0004] In a first aspect, the present application provides a water-cooled and heat-dissipated vehicle-mounted device. The housing of the vehicle-mounted device includes an integrated housing and an electrical cover plate. The integrated housing includes an electrical receiving groove, and the electrical cover plate is used to enclose the electrical receiving groove. The electrical receiving groove is used to accommodate electrical components of at least one of a vehicle-mounted charger or a motor controller. The integrated housing includes a housing water channel inlet, and the electrical cover plate includes a cover plate water channel inlet, a cover plate internal flow channel, and a cover plate water channel outlet. The cover plate internal flow channel is used to receive cooling water through the cover plate water channel inlet, and the cover plate internal flow channel is used to deliver the cooling water to the housing water channel inlet through the cover plate water channel outlet. The housing water channel inlet is distributed on the outer side of the electrical receiving groove, the cover plate water channel inlet and the cover plate water channel outlet are distributed on the side of the electrical cover plate facing the electrical receiving groove, the orientation of the cover plate water channel inlet is opposite to the orientation of the groove opening of the electrical receiving groove, and the orientation of the housing water channel inlet is the same as the orientation of the groove opening of the electrical receiving groove.

[0005] The water-cooled and heat-dissipated vehicle-mounted device provided by the present application encloses the electrical receiving groove of the integrated housing by the electrical cover plate to seal and protect the electrical components of at least one of the vehicle-mounted charger or the motor controller accommodated in the electrical receiving groove. The vehicle-mounted device also forms part of the cooling water flow channel through the electrical cover plate. The electrical cover plate receives the cooling water delivered by the water cooling system of the electric vehicle through the cover plate water channel inlet and sends the cooling water into the integrated housing through the oppositely oriented cover plate water channel outlet and housing water channel inlet. The cooling water can dissipate heat for the vehicle-mounted charger or the motor controller in the electrical receiving groove when flowing in the cover plate internal flow channel of the electrical cover plate. The cooling water can continue to dissipate heat for the vehicle-mounted charger or the motor controller after flowing into the integrated housing, which ensures the reliable operation of the vehicle-mounted device.

[0006] The direction of the cover plate waterway inlet is opposite to the orientation of the slot of the electrical accommodating groove, the water pipe of the water cooling system is arranged adjacent to the integrated shell and communicates with the cover plate waterway inlet in the direction from the integrated shell to the electrical cover plate, the water pipe does not occupy the space on the side of the electrical cover plate away from the integrated shell, and the overall height of the shell of the vehicle-mounted device is controlled. The water cooling and heat dissipation vehicle-mounted device provided in the application has high integration, and is beneficial to miniaturization.

[0007] In an implementation, the electrical accommodating groove is further used for accommodating a first circuit board, a side of the electrical cover plate facing the electrical accommodating groove is used for fixing the first circuit board, a side of the first circuit board facing the electrical cover plate is used for fixing a capacitor component and an inductor component in the electrical components of the vehicle-mounted charger, and the side of the electrical cover plate facing the first circuit board includes a plurality of shielding protrusions, and the plurality of shielding protrusions are respectively used for being embedded in gaps of other electrical components of the vehicle-mounted charger.

[0008] In the implementation, the first circuit board and the electrical cover plate are arranged at intervals, and the capacitor component and the inductor component in the electrical components of the vehicle-mounted charger are fixed between the first circuit board and the electrical cover plate. The cooling water can dissipate heat for the capacitor component and the inductor component when flowing through the cover plate internal flow channel of the electrical cover plate. The plurality of shielding protrusions of the electrical cover plate facing the first circuit board are used for realizing electromagnetic shielding inside the capacitor component, inside the inductor component, and between the capacitor component and the inductor component. The electrical cover plate can form the functions of heat dissipation and shielding for the vehicle-mounted charger.

[0009] In an implementation, the electrical accommodating groove is further used for accommodating a liquid cooling heat dissipation plate, the cover plate internal flow channel is used for communicating with an internal flow channel of the liquid cooling heat dissipation plate, the first circuit board is arranged between the liquid cooling heat dissipation plate and the electrical cover plate, and a side of the first circuit board facing the liquid cooling heat dissipation plate is used for fixing a plurality of power modules in the electrical components of the vehicle-mounted charger and the liquid cooling heat dissipation plate.

[0010] In the implementation, the first circuit board and the liquid cooling heat dissipation plate are arranged at intervals, and the plurality of power modules in the electrical components of the vehicle-mounted charger are fixed between the first circuit board and the liquid cooling heat dissipation plate. The cooling water can dissipate heat for the plurality of power modules when flowing through the liquid cooling heat dissipation plate. The liquid cooling heat dissipation plate and the electrical cover plate can jointly dissipate heat for the vehicle-mounted charger to ensure reliable work of the vehicle-mounted charger.

[0011] In an implementation, the electrical accommodating groove is further configured to accommodate a water-cooled radiator and a second circuit board. The water-cooled radiator is configured to receive cooling water input from the housing water channel inlet. The second circuit board is configured to control a three-phase inverter circuit in the electrical components of the motor controller. The three-phase inverter circuit includes a bus capacitor module and a plurality of power modules. The first circuit board, the liquid-cooled heat sink, the second circuit board, the water-cooled radiator, and the bus capacitor module are sequentially stacked between the electrical cover plate and the groove bottom of the electrical accommodating groove. The bus capacitor module is configured to fix the second circuit board and the water-cooled radiator. The plurality of power modules are arranged between the second circuit board and the water-cooled radiator.

[0012] In the implementation, the motor controller is arranged between the groove bottom of the electrical accommodating groove and the liquid-cooled heat sink. The water-cooled radiator is configured to dissipate heat from the plurality of power modules of the motor controller to ensure reliable operation of the motor controller. The water-cooled radiator is configured to receive cooling water input from the electrical cover plate through the housing water channel inlet of the integrated housing.

[0013] In an implementation, the electrical cover plate includes a cooling groove and a cooling cover plate. The cooling groove is arranged on a side of the electrical cover plate away from the electrical accommodating groove. The cooling cover plate is configured to enclose the cooling groove to form an internal flow channel of the cover plate. The groove bottom of the cooling groove includes a first through hole and a second through hole. The first through hole and the second through hole respectively pass through the groove bottom of the cooling groove. The first through hole is configured to communicate with the inlet of the liquid-cooled heat sink. The second through hole is configured to communicate with the outlet of the liquid-cooled heat sink.

[0014] In the implementation, the groove opening direction of the cooling groove of the electrical cover plate is the same as the groove opening direction of the electrical accommodating groove. The cooling cover plate covers the cooling groove to enclose the internal flow channel of the cover plate. When an accident occurs, the cooling water seeps out in a direction away from the electrical accommodating groove, which can protect the electrical components in the electrical accommodating groove. The cooling groove further communicates with the liquid-cooled heat sink through the first through hole and the second through hole, thereby circulating and delivering cooling water to the liquid-cooled heat sink.

[0015] In an implementation, the liquid-cooled heat sink is arranged parallel to and spaced apart from the electrical cover plate. The side of the liquid-cooled heat sink facing the electrical cover plate is configured to fix a heat sink water nozzle. The heat sink water nozzle includes a first communication water channel and a second communication water channel. The first communication water channel is configured to communicate with the inlet of the liquid-cooled heat sink and the first through hole. The second communication water channel is configured to communicate with the outlet of the liquid-cooled heat sink and the second through hole.

[0016] In the implementation, the liquid-cooled heat sink is arranged parallel to and spaced apart from the electrical cover plate. The side of the liquid-cooled heat sink facing the electrical cover plate is configured to fix a heat sink water nozzle. Along the direction of the electrical cover plate and the liquid-cooled heat sink stacked in layers, one end of the heat sink water nozzle is configured to communicate with the inlet and the outlet of the liquid-cooled heat sink. The other end of the heat sink water nozzle is configured to communicate with the first through hole and the second through hole, thereby introducing cooling water from the electrical cover plate into the liquid-cooled heat sink.

[0017] In one implementation, the two ends of the water nozzle of the heat sink are arranged along the direction of the stacking of the electrical cover plate and the liquid-cooled heat sink, and the two ends of the water nozzle of the heat sink include two grooves. The inlet of the first communication channel and the outlet of the second communication channel are arranged on the bottom of one of the two grooves, and the one groove is used to cover the first through hole and the second through hole, the inlet of the first communication channel is used to connect the first through hole, and the outlet of the second communication channel is used to connect the second through hole. The outlet of the first communication channel and the inlet of the second communication channel are arranged on the bottom of the other of the two grooves, and the other groove is used to cover the inlet of the liquid-cooled heat sink and the outlet of the liquid-cooled heat sink, the outlet of the first communication channel is used to connect the inlet of the liquid-cooled heat sink, and the inlet of the second communication channel is used to connect the outlet of the liquid-cooled heat sink.

[0018] In the present implementation, the two ends of the water nozzle of the heat sink are connected to the liquid-cooled heat sink and the electrical cover plate through two grooves, so as to realize the circulation of the cooling water between the liquid-cooled heat sink and the electrical cover plate. One groove is used to accommodate the inlet and outlet of the liquid-cooled heat sink, and the groove wall of the one groove can be used to form a sealing fit with the inlet and outlet of the liquid-cooled heat sink. The other groove is used to connect the first through hole and the second through hole, and the groove wall of the other groove can be used to form a sealing fit with the first through hole and the second through hole. The two grooves are used to prevent the leakage of the cooling water in the electrical accommodation groove.

[0019] In one implementation, the bottom of the cooling groove further includes a third through hole, a fourth through hole, and a first separation protrusion, the third through hole is used to communicate with the inlet of the cover plate channel, the fourth through hole is used to communicate with the outlet of the cover plate channel, and the first separation protrusion is used to separate the third through hole and the fourth through hole to form a U-shaped flow channel.

[0020] In the present implementation, the first separation protrusion is used to form a U-shaped flow channel in the internal flow channel of the cover plate, so as to increase the flow path of the cooling water in the internal flow channel of the cover plate, so that the cooling water can form more sufficient heat exchange with the vehicle-mounted charging machine to improve the heat dissipation effect of the electrical cover plate.

[0021] In one implementation, the bottom of the cooling groove further includes a second separation protrusion, the second separation protrusion is used to separate the first through hole and the second through hole, the third through hole and the first through hole are arranged between the first separation protrusion and the second separation protrusion, the first through hole and the third through hole are arranged on one side of the second separation protrusion, and the second through hole is arranged on the other side of the second separation protrusion.

[0022] In the present embodiment, the third through hole and the first through hole are arranged between the first partitioning protrusion and the second partitioning protrusion, the second partitioning protrusion is used to separate the first through hole and the second through hole, the cooling water flowing from the cover plate waterway inlet to the cover plate internal flow channel through the third through hole first flows into the liquid cooling heat dissipation plate from the first through hole, and then flows back to the cover plate internal flow channel from the second through hole, and then flows into the shell waterway inlet from the cover plate waterway outlet through the fourth through hole. Such arrangement can ensure that the cooling water flowing into the liquid cooling heat dissipation plate has a lower temperature, and improve the heat dissipation effect of the liquid cooling heat dissipation plate on the plurality of power modules.

[0023] In an embodiment, the bottom of the cooling groove further comprises a plurality of heat dissipation teeth and a plurality of flow guide teeth. The plurality of heat dissipation teeth are distributed on both sides of the first partitioning protrusion, and the plurality of flow guide teeth are distributed on both sides of the first partitioning protrusion. At least one of the number, shape or arrangement of the flow guide teeth or the heat dissipation teeth on both sides of the first partitioning protrusion is different.

[0024] In the present embodiment, the plurality of heat dissipation teeth are used to slow down the flow rate of the cooling water in the cover plate internal flow channel to improve the heat exchange effect when the cooling water flows through the plurality of heat dissipation teeth, and the plurality of flow guide teeth are used to guide the cooling water to flow along the flow path in the cover plate internal flow channel. The plurality of heat dissipation teeth and the plurality of flow guide teeth are alternately arranged in the cover plate internal flow channel, so as to form heat dissipation areas of different numbers, different sizes and different regions in the cover plate internal flow channel, and match the number, shape and position of the electrical components of the vehicle charger respectively through the heat dissipation areas.

[0025] In an embodiment, the bottom of the electrical component accommodating groove further comprises a first groove bottom waterway interface and a second groove bottom waterway interface. The inlet of the water-cooled heat sink is used to receive the cooling water input by the shell waterway inlet through the first groove bottom waterway interface, and the second groove bottom waterway interface is used to receive the cooling water output by the outlet of the water-cooled heat sink. The direction of the first groove bottom waterway interface and the direction of the second groove bottom waterway interface are the same as the direction of the groove opening of the electrical component accommodating groove, the direction of the inlet of the water-cooled heat sink and the direction of the outlet of the water-cooled heat sink are opposite to the direction of the groove opening of the electrical component accommodating groove, the inlet of the water-cooled heat sink is embedded in the first groove bottom waterway interface, and the outlet of the water-cooled heat sink is embedded in the second groove bottom waterway interface.

[0026] In the present embodiment, the integrated shell is used to communicate with the water-cooled heat sink through the first groove bottom waterway interface and the second groove bottom waterway interface. The first groove bottom waterway interface and the second groove bottom waterway interface respectively extend from the bottom of the electrical component accommodating groove to the water-cooled heat sink, and the inlet and the outlet of the water-cooled heat sink are respectively embedded in the first groove bottom waterway interface and the second groove bottom waterway interface, so as to form a sealed fit through the inner wall of the first groove bottom waterway interface and the outer wall of the inlet of the water-cooled heat sink, and the inner wall of the second groove bottom waterway interface and the outer wall of the outlet of the water-cooled heat sink, respectively, to prevent leakage of the cooling water in the electrical component accommodating groove.

[0027] One implementation, the integrated housing further comprises an internal water inlet channel for connecting the housing water inlet and the first tank bottom water channel interface, an internal water outlet channel for connecting the second tank bottom water channel interface and the housing water outlet. The housing water inlet and the housing water outlet are distributed on the same side of the electrical tank, and the housing water outlet has a different orientation than the housing water inlet.

[0028] In the present implementation, the integrated housing transports the cooling water flowing into the housing water inlet through the internal water inlet channel to the first tank bottom water channel interface, and transports the cooling water flowing out of the water cooling radiator through the internal water outlet channel to the water cooling system of the electric vehicle. Because the housing water inlet and the cover water inlet are located on the same side of the electrical tank, the housing water outlet and the cover water inlet are also located on the same side of the electrical tank. The water pipes of the water cooling system of the electric vehicle are arranged on the same side of the housing of the vehicle-mounted device to respectively input and receive the cooling water output by the housing, and the two water pipes occupy the same side space of the housing of the vehicle-mounted device, so that the overall width of the housing of the vehicle-mounted device can be controlled.

[0029] One implementation, the electrical cover is used to fix a water channel communication assembly, the water channel communication assembly comprises two ends, one of the two ends of the water channel communication assembly is used to enclose the cover water inlet, and the other of the two ends of the water channel communication assembly is used to receive the cooling water transported by the water pipe of the water cooling system of the electric vehicle, and the housing water outlet of the integrated housing is used to transport the cooling water to the water pipe of the water cooling system of the electric vehicle.

[0030] In the present implementation, the electrical cover is substantially plate-shaped, and the electrical cover is in communication with the water pipe of the water cooling system through a water channel communication assembly, so as to facilitate the sealing cooperation between the water channel communication assembly and the water pipe. The housing water outlet can be configured in the form of a water nozzle, so as to directly communicate and seal with the water pipe of the water cooling system.

[0031] One implementation, the vehicle-mounted device further comprises a driving motor and a speed reducer, the housing of the vehicle-mounted device further comprises a motor end cover and a speed reducer end cover, the integrated housing further comprises a motor accommodating tank and a speed reducer accommodating tank, the motor accommodating tank is used to fix and accommodate the stator of the driving motor, the motor end cover is used to enclose the motor accommodating tank, the speed reducer accommodating tank is used to accommodate the gear set of the speed reducer, and the speed reducer end cover is used to enclose the speed reducer accommodating tank. The motor accommodating tank and the speed reducer accommodating tank are arranged adjacent to each other along the axial direction of the driving motor, the opening direction of the motor accommodating tank is opposite to the opening direction of the speed reducer accommodating tank, and the opening direction of the electrical tank is perpendicular to the opening direction of the motor accommodating tank and the opening direction of the speed reducer accommodating tank.

[0032] In the present embodiment, the integrated housing of the vehicle-mounted device of the present application further comprises a motor accommodating groove and a reducer accommodating groove, the integrated housing is used to fix the stator of the driving motor, the motor end cover and the reducer end cover are used to fix the transmission shaft of the reducer through bearings, the motor accommodating groove is used to accommodate the driving motor, and the reducer accommodating groove is used to accommodate the gear set of the reducer. The integration of the vehicle-mounted device of the present application is further improved.

[0033] The slot opening direction of the motor accommodating groove is opposite to the slot opening direction of the reducer accommodating groove, the driving motor is arranged adjacent to the reducer along the axial direction of the driving motor, and the length dimension of the vehicle-mounted device of the present application along the axial direction of the driving motor is reduced. The slot opening direction of the electrical accommodating groove is perpendicular to the slot opening direction of the motor accommodating groove and the slot opening direction of the reducer accommodating groove, the electrical cover plate of the vehicle-mounted device is parallel to the axial direction of the driving motor and is closer to the axis of the driving motor, and the height dimension of the vehicle-mounted device of the present application along the direction perpendicular to the electrical cover plate is reduced. The overall volume of the vehicle-mounted device of the present application is further reduced.

[0034] In an implementation, the slot wall of the electrical accommodating groove comprises a first segment slot wall, a second segment slot wall, a third segment slot wall and a fourth segment slot wall, the first segment slot wall and the second segment slot wall are arranged opposite to each other along the axial direction of the driving motor, the third segment slot wall and the fourth segment slot wall are arranged opposite to each other along the direction perpendicular to the axial direction of the driving motor, the distance between the first segment slot wall and the slot opening of the motor accommodating groove is greater than the distance between the second segment slot wall and the slot opening of the motor accommodating groove, the distance between the third segment slot wall and the motor shaft of the driving motor is smaller than the distance between the fourth segment slot wall and the motor shaft of the driving motor, the power battery interface of the vehicle-mounted device is distributed on the first segment slot wall, the load power supply interface of the vehicle-mounted device is distributed on the second segment slot wall, the control signal interface of the vehicle-mounted device is distributed on the third segment slot wall, and the housing waterway outlet and the housing waterway inlet are distributed on the outer side of the fourth segment slot wall.

[0035] In the present embodiment, the second segment slot wall and the first segment slot wall are arranged in sequence along the direction from the motor end cover to the reducer end cover. The vehicle-mounted device receives power supply from or supplies power to the power battery through the power battery interface on the first segment slot wall, and supplies power to the load of the electric vehicle through the load power supply interface on the second segment slot wall.

[0036] Along the direction perpendicular to the axial direction of the driving motor, the fourth segment slot wall is offset to one side of the driving motor relative to the third segment slot wall, the fourth segment slot wall is arranged adjacent to the output wheel of the gear set of the reducer along the axial direction of the driving motor, the electrical accommodating groove sufficiently utilizes the space on the side of the driving motor facing the output wheel of the reducer, so as to reduce the overall width dimension of the vehicle-mounted device. The vehicle-mounted device receives or sends the control signal of the electric vehicle through the control signal interface on the third segment slot wall, and receives the cooling water delivered by the water cooling system through the cover plate waterway inlet on the fourth segment slot wall and delivers the cooling water to the cooling system through the housing waterway outlet on the fourth segment slot wall.

[0037] In a second aspect, the present application provides an electric vehicle, the electric vehicle comprising a power battery and the vehicle-mounted device provided by any of the above implementation manners, the vehicle-mounted device being configured to charge the power battery or to drive wheels by power supply of the power battery.

[0038] The electric vehicle provided by the second aspect of the present application saves internal space due to the inclusion of the above vehicle-mounted device, which is conducive to improving the integration and miniaturization of the electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be described below.

[0040] Figure 1 A structural schematic diagram of an electric vehicle 200 provided by an embodiment of the present application;

[0041] Figure 2 An internal power supply logic schematic diagram of the electric vehicle 200 provided by an embodiment of the present application;

[0042] Figure 3 An internal component schematic diagram of a vehicle-mounted device 100 provided by an embodiment of the present application;

[0043] Figure 4 An appearance structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0044] Figure 5 An exploded structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0045] Figure 6 A partial structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0046] Figure 7 A partial structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0047] Figure 8 An exploded structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0048] Figure 9 An exploded structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0049] Figure 10 A partial structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0050] Figure 11 An exploded structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application;

[0051] Figure 12 A schematic diagram of a planar structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 1.

[0052] Figure 13 A schematic diagram of a partial structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 2.

[0053] Figure 14 A schematic diagram of an exploded structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 3.

[0054] Figure 15 A schematic diagram of a partial structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 4.

[0055] Figure 16 A schematic diagram of a partial structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 5.

[0056] Figure 17 A schematic diagram of an exploded structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 6.

[0057] Figure 18 A schematic diagram of a partial structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 7.

[0058] Figure 19 A schematic diagram of a partial structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 8.

[0059] Figure 20 A schematic diagram of a partial cross-section of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 9.

[0060] Figure 21 A schematic diagram of a partial structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 10.

[0061] Figure 22 A schematic diagram of an exploded structure of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 11.

[0062] Figure 23 A schematic diagram of a partial cross-section of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 12.

[0063] Figure 24 A schematic diagram of a partial cross-section of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 13.

[0064] Figure 25 A schematic diagram of a partial cross-section of the vehicle-mounted device 100 according to an embodiment of the present application is shown in FIG. 14.

[0065] Figure 26This is a schematic diagram of the structure of a vehicle-mounted device 100 provided in one embodiment of this application;

[0066] Figure 27 This is an exploded structural diagram of a vehicle-mounted device 100 provided in one embodiment of this application;

[0067] Figure 28 This is a schematic diagram of the structure of a vehicle-mounted device 100 provided in one embodiment of this application;

[0068] Figure 29 This is an exploded structural diagram of a vehicle-mounted device 100 provided in one embodiment of this application;

[0069] Figure 30 This is a schematic diagram of the structure of a vehicle-mounted device 100 provided in one embodiment of this application;

[0070] Figure 31 This is a schematic diagram of the structure of a vehicle-mounted device 100 provided in one embodiment of this application;

[0071] Figure 32 This is a partial structural schematic diagram of a vehicle-mounted device 100 provided in one embodiment of this application;

[0072] Figure 33 This is a partial structural schematic diagram of a vehicle-mounted device 100 provided in one embodiment of this application;

[0073] Figure 34 This is a partially exploded structural diagram of a vehicle-mounted device 100 provided in one embodiment of this application;

[0074] Figure 35 This is a partially exploded structural diagram of a vehicle-mounted device 100 provided in one embodiment of this application;

[0075] Figure 36 This is a partial cross-sectional structural diagram of a vehicle-mounted device 100 provided in one embodiment of this application. Detailed Implementation

[0076] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0077] For ease of understanding, the English abbreviations and related technical terms used in the embodiments of this application will be explained and described below.

[0078] OBC: On-board Charger, vehicle-mounted charger, is a power electronic device that converts alternating current into direct current to charge the power battery of the vehicle.

[0079] ACDC: Alternating Current to Direct Current, AC-DC conversion circuit, which can convert AC power into DC current or convert DC current into AC current. For example, external high-voltage charging current can be converted into high-voltage DC current to charge the power battery of the vehicle, or the high-voltage DC current of the power battery can be converted into high-voltage AC current to power the drive motor.

[0080] DCDC: Direct Current to Direct Current, DC-DC conversion circuit, which can convert DC current of one voltage level into DC current of another voltage level, serving to regulate power output and stabilize power voltage. For example, high-voltage DC output by the power battery of the vehicle can be converted into low-voltage DC to power other electrical components in the vehicle.

[0081] MCU: Motor Control Unit, motor controller, which receives control instructions from the vehicle controller and controls the speed and direction of the drive motor.

[0082] In this document, "high voltage" and "low voltage" refer to the relative size of the voltage, and the voltage of "high voltage" is relatively higher than the voltage of "low voltage", which does not represent the specific voltage value.

[0083] The application provides a water-cooled heat dissipation vehicle-mounted device. The shell of the vehicle-mounted device includes an integrated shell and an electrical cover plate. The integrated shell includes an electrical receiving groove, and the electrical cover plate is used to enclose the electrical receiving groove. The electrical receiving groove is used to accommodate electrical components of at least one of the vehicle-mounted charger or the motor controller. The integrated shell includes a shell water inlet, and the electrical cover plate includes a cover plate water inlet, a cover plate internal flow channel, and a cover plate water outlet. The cover plate internal flow channel is used to receive cooling water through the cover plate water inlet, and the cover plate internal flow channel is used to deliver the cooling water to the shell water inlet through the cover plate water outlet. The shell water inlet is distributed on the outer side of the electrical receiving groove, the cover plate water inlet and the cover plate water outlet are distributed on the side of the electrical cover plate facing the electrical receiving groove, the orientation of the cover plate water inlet is opposite to the orientation of the slot of the electrical receiving groove, and the orientation of the shell water inlet is the same as the orientation of the slot of the electrical receiving groove. The water-cooled heat dissipation vehicle-mounted device provided by the application forms part of the cooling water flow channel through the electrical cover plate. When the cooling water flows in the cover plate internal flow channel of the electrical cover plate, it can dissipate heat for the vehicle-mounted charger or the motor controller in the electrical receiving groove, ensuring reliable operation of the vehicle-mounted device.

[0084] The application provides an electric vehicle, which comprises a power battery and a vehicle-mounted device provided by the application, and the vehicle-mounted device is used for charging the power battery or driving wheels by power supply of the power battery. The electric vehicle provided by the application has a more compact internal space, and is beneficial to miniaturization of the electric vehicle.

[0085] The electric vehicle provided by the application includes an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle and the like. In some embodiments, the electric vehicle includes a passenger car, various special-purpose vehicles with specific functions, such as an engineering rescue vehicle, a water spraying vehicle, a sewage suction vehicle, a cement mixing vehicle, a hoisting vehicle, a medical vehicle and the like. The electric vehicle can also be a robot capable of driving.

[0086] Please refer to Figure 1 The structural schematic diagram of the electric vehicle 200 provided by an embodiment of the application is shown in FIG. 1, and Figure 2 The internal power supply logic schematic diagram of the electric vehicle 200 provided by an embodiment of the application is shown in FIG. 2.

[0087] As Figure 1 shown, the electric vehicle 200 provided by the application comprises a power battery 201 and a vehicle-mounted device 100 provided by the application. The power battery 201 and the vehicle-mounted device 100 are respectively fixed to a vehicle frame of the electric vehicle 200. The vehicle-mounted device 100 is used for electrical connection with the power battery 201.

[0088] The power battery 201 is used for power supply of various electrical components of the electric vehicle 200. The various electrical components of the electric vehicle 200 include a first type of load 210 and a second type of load 220. The first type of load 210 is a high-voltage load, such as a compressor and a heater of the electric vehicle 200. The second type of load 220 is a low-voltage load, such as at least one of a low-voltage storage battery, a lighting lamp, a windshield wiper, an air conditioner, a sound device, a USB interface, an instrument panel and a control display screen. The low-voltage storage battery can also supply power to other loads in the second type of load 220.

[0089] The current outputted by the power battery 201 is high-voltage direct current. The power battery 201 can directly supply power to the first type of load 210, and supply power to the second type of load 220 through the vehicle-mounted device 100 provided by the present application. In some embodiments, the power battery 201 can also supply power to the first type of load 210 through the vehicle-mounted device 100 provided by the present application.

[0090] In an embodiment, the electric vehicle 200 provided by the present application includes a drive motor 202. The drive motor 202 is used to drive the rotation of the wheels of the electric vehicle 200. The drive motor 202 belongs to the first type of load 210. The working current of the drive motor 202 is high-voltage alternating current. The power battery 201 supplies power to the drive motor 202 through the vehicle-mounted device 100 provided by the present application. That is, the vehicle-mounted device 100 provided by the present application is used to receive the high-voltage direct current inputted by the power battery 201 and convert it into high-voltage alternating current to supply power to the drive motor 202.

[0091] The vehicle-mounted device 100 is used for charging and discharging the power battery 201 and for supplying power to the drive motor 202. The vehicle-mounted device 100 receives high-voltage charging current through an external power source. In an embodiment, the external power source can be an alternating current grid, an alternating current charging pile, or an uninterruptible power system (UPS). At this time, the external power source is an alternating current power source. The vehicle-mounted device 100 is used to be electrically connected with the external power source and receive high-voltage alternating current. The vehicle-mounted device 100 converts the received high-voltage alternating current into high-voltage direct current and delivers it to the power battery 201 to realize the charging and discharging function.

[0092] In an embodiment, the vehicle-mounted device 100 provided by the present application converts the received high-voltage alternating current in terms of voltage amplitude or frequency, and outputs another form of alternating current to supply power to other electrical components that need to work under alternating current.

[0093] In an embodiment, the vehicle-mounted device 100 provided by the present application includes a drive motor 202.

[0094] Please refer to Figure 3 The internal component diagram of the vehicle-mounted device 100 provided by an embodiment of the present application is shown.

[0095] The vehicle-mounted device 100 provided by the present application includes at least one of a vehicle-mounted charger 10 and a motor controller 20. The vehicle-mounted charger 10 is used to receive high-voltage charging current and convert it into high-voltage direct current to deliver it to the power battery 201. The vehicle-mounted charger 10 is also used to receive the high-voltage direct current inputted by the power battery 201 and convert it into low-voltage direct current to supply power to the second type of load 220 of the electric vehicle 200.

[0096] ​​​​​​​​The on-board charger 10 comprises an AC conversion circuit and a DC conversion circuit. The AC conversion circuit is configured to receive the high-voltage charging current and convert it into DC power for powering the power battery 201. The DC conversion circuit is configured to receive the high-voltage DC power from the power battery 201 and convert it into low-voltage DC power for powering the second type of load 220 of the electric vehicle 200. The motor controller 20 is configured to receive the high-voltage DC power from the power battery 201 and convert it into high-voltage AC current for powering the driving motor 202. The motor controller 20 also comprises an AC conversion circuit.

[0097] Referring to Figure 4 Fig. 1 shows a schematic diagram of an appearance structure of an on-board device 100 according to an embodiment of the present application, Figure 5 Fig. 2 shows a schematic diagram of an exploded structure of the on-board device 100 according to the embodiment of the present application, and Figure 6 Fig. 3 shows a schematic diagram of a partial structure of the on-board device 100 according to the embodiment of the present application.

[0098] The on-board device 100 according to the embodiment of the present application comprises a housing and a power supply integrated module. The housing comprises an integrated housing 30 and an electrical cover plate 40. The integrated housing 30 comprises an electrical accommodating groove 31, and the power supply integrated module is accommodated in the electrical accommodating groove 31. The electrical cover plate 40 is configured to enclose the electrical accommodating groove 31. The power supply integrated module comprises at least one of the on-board charger 10 and the motor controller 20. That is, the electrical accommodating groove 31 is configured to accommodate electrical components of at least one of the on-board charger 10 and the motor controller 20.

[0099] The integrated housing 30 comprises a housing water inlet 301, and the electrical cover plate 40 comprises a cover plate water inlet 401, a cover plate internal flow channel, and a cover plate water outlet 402. The cover plate internal flow channel is configured to receive cooling water through the cover plate water inlet 401 and deliver the cooling water to the housing water inlet 301 through the cover plate water outlet 402. The housing water inlet 301 is distributed on the outer side of the electrical accommodating groove 31, and the cover plate water inlet 401 and the cover plate water outlet 402 are distributed on the side of the electrical cover plate 40 facing the electrical accommodating groove 31. The cover plate water inlet 401 is opposite to the direction of the slot of the electrical accommodating groove 31, and the housing water inlet 301 is in the same direction as the slot of the electrical accommodating groove 31.

[0100] The water-cooled and heat-dissipated vehicle-mounted device 100 provided by the present application encloses the electrical accommodating groove 31 of the integrated housing 30 by the electrical cover plate 40, so as to seal and protect the electrical components of at least one of the vehicle-mounted charger 10 or the motor controller 20 accommodated in the electrical accommodating groove 31. The vehicle-mounted device 100 also forms a part of the cooling water flow channel by the electrical cover plate 40, wherein the electrical cover plate 40 receives the cooling water delivered by the water-cooling system of the electric vehicle 200 through the cover plate water channel inlet 401, and sends the cooling water into the integrated housing 30 through the opposite cover plate water channel outlet 402 and the housing water channel inlet 301. The cooling water can dissipate heat for the vehicle-mounted charger 10 or the motor controller 20 in the electrical accommodating groove 31 when flowing in the cover plate internal flow channel of the electrical cover plate 40. The cooling water can continue to dissipate heat for the vehicle-mounted charger 10 or the motor controller 20 after flowing into the integrated housing 30, so as to ensure the reliable work of the vehicle-mounted device 100.

[0101] The direction of the cover plate water channel inlet 401 is opposite to the direction of the slot of the electrical accommodating groove 31, the water pipe of the water-cooling system is arranged adjacent to the integrated housing 30 in the direction from the integrated housing 30 to the electrical cover plate 40, the water pipe does not occupy the space on the side of the electrical cover plate 40 away from the integrated housing 30, and the overall height of the housing of the vehicle-mounted device 100 is controlled. The water-cooled and heat-dissipated vehicle-mounted device 100 provided by the present application has high integration, and is beneficial to miniaturization. The electric vehicle 200 provided by the present application saves the internal space due to the vehicle-mounted device 100, and is beneficial to improving the integration and miniaturization of the electric vehicle 200.

[0102] In the embodiment of the present application, the all-in-one vehicle-mounted device 100 also becomes an all-in-one vehicle-mounted power supply device.

[0103] In the embodiment of the present application, the cooling water in the vehicle-mounted device 100 can be cooling liquid or cooling oil.

[0104] Please refer to Figure 7 the partial structure schematic view of the vehicle-mounted device 100 provided by an embodiment of the present application, Figure 8 the exploded structure schematic view of the vehicle-mounted device 100 provided by an embodiment of the present application, Figure 9 the exploded structure schematic view of the vehicle-mounted device 100 provided by an embodiment of the present application, and Figure 10 the partial structure schematic view of the vehicle-mounted device 100 provided by an embodiment of the present application.

[0105] In one embodiment, the electric accommodating groove 31 is also used to accommodate the first circuit board 11, the side of the electric cover plate 40 facing the electric accommodating groove 31 is used to fix the first circuit board 11, the side of the first circuit board 11 facing the electric cover plate 40 is used to fix the capacitor component and the inductor component 12 in the electric components of the on-board charger 10, and the side of the electric cover plate 40 facing the first circuit board 11 comprises a plurality of shielding protrusions 41, which are respectively used to be embedded in the gaps of other electric components of the on-board charger 10.

[0106] In this embodiment, the first circuit board 11 and the electric cover plate 40 are arranged in a spaced manner, and the capacitor component and the inductor component 12 in the electric components of the on-board charger 10 are fixed between the first circuit board 11 and the electric cover plate 40. The cooling water can dissipate heat for the capacitor component and the inductor component 12 when flowing through the cover-plate internal flow channel of the electric cover plate 40. The plurality of shielding protrusions 41 of the electric cover plate 40 facing the first circuit board 11 are used to realize electromagnetic shielding inside the capacitor component, inside the inductor component, and between the capacitor component and the inductor component 12. The electric cover plate 40 can form the functions of heat dissipation and shielding for the on-board charger 10.

[0107] Please refer to Figure 11 the exploded structural schematic diagram of the on-board device 100 provided by one embodiment of the present application, and Figure 12 the planar structural schematic diagram of the on-board device 100 provided by one embodiment of the present application.

[0108] In one embodiment, the electric accommodating groove 31 is also used to accommodate the liquid cooling heat dissipation plate 50, the cover-plate internal flow channel is used to communicate with the internal flow channel of the liquid cooling heat dissipation plate 50, the first circuit board 11 is arranged between the liquid cooling heat dissipation plate 50 and the electric cover plate 40, and the side of the first circuit board 11 facing the liquid cooling heat dissipation plate 50 is used to fix a plurality of power modules 14 in the electric components of the on-board charger 10 and the liquid cooling heat dissipation plate 50.

[0109] In this embodiment, the first circuit board 11 and the liquid cooling heat dissipation plate 50 are arranged in a spaced manner, and the plurality of power modules 14 in the electric components of the on-board charger 10 are fixed between the first circuit board 11 and the liquid cooling heat dissipation plate 50. The cooling water can dissipate heat for the plurality of power modules 14 when flowing through the liquid cooling heat dissipation plate 50. The liquid cooling heat dissipation plate 50 and the electric cover plate 40 can jointly dissipate heat for the on-board charger 10 to ensure reliable operation of the on-board charger 10. That is, along the height direction of the on-board device 100, the plurality of power modules 14 are fixed to the surface of the first circuit board 11 facing the liquid cooling heat dissipation plate 50, and the orthographic projection of the liquid cooling heat dissipation plate 50 accommodates the plurality of power modules 14.

[0110] In the embodiments of the vehicle-mounted device 100, the comparison of the orthographic projection of A to B can be understood as the comparison of the area of the orthographic projection of A on B to B, or the comparison between the two orthographic projections of A and B on C respectively. C is a planar structure perpendicular to the direction. For example, in the height direction of the vehicle-mounted device 100, C can be any one of the electrical cover plate 40, the bottom plate 32, the circuit board of the vehicle-mounted charger 10, or the circuit board of the motor controller 20.

[0111] In an embodiment, at least part of the power modules 14 are used to form the AC conversion circuit of the vehicle-mounted charger 10. The vehicle-mounted charger 10 is used to convert the high-voltage charging current from AC to DC by the plurality of power modules 14, so as to charge the power battery 201. The power module 14 is one of the main heat sources of the vehicle-mounted charger 10. The plurality of power modules 14 are arranged in the planar direction of the first circuit board 11. Because the liquid cooling heat sink 50 is arranged in a stacked manner with the first circuit board 11, the liquid cooling heat sink 50 is close to the plurality of power modules 14 in the thickness direction of the first circuit board 11. The orthographic projection of the liquid cooling heat sink 50 contains the plurality of power modules 14, and each power module 14 can be cooled to ensure the reliable operation of the vehicle-mounted charger 10.

[0112] In an embodiment, the liquid cooling heat sink 50 abuts against each power module 14. In an embodiment, a heat-conducting material such as heat-conducting glue is arranged between the liquid cooling heat sink 50 and each power module 14. The liquid cooling heat sink 50 and each power module 14 are connected in a heat-conducting manner through the heat-conducting material. The heat-conducting material can also be used to adapt to the assembly tolerance between the liquid cooling heat sink 50 and each power module 14, and reduce the internal stress of the vehicle-mounted device 100 provided by the application.

[0113] In an embodiment, part of the plurality of capacitor assemblies and inductor assemblies 12 are fixed to the electrical cover plate 40. In the height direction of the vehicle-mounted device 100, the part of the capacitor assemblies and inductor assemblies are fixed to the electrical cover plate 40 towards the first circuit board 11. That is, the first circuit board 11, the plurality of capacitor assemblies and inductor assemblies 12, and the electrical cover plate 40 are arranged in a stacked manner. In the height direction of the vehicle-mounted device 100, the coverage area of the cover plate internal flow channel contains the orthographic projection of the plurality of capacitor assemblies and inductor assemblies 12.

[0114] The plurality of capacitive and inductive components 12 are used to form a DC conversion circuit of the on-board charger 10. The on-board charger 10 is used to output a voltage of an electric current adjusted by the plurality of capacitive and inductive components to electrical components in a vehicle. The plurality of capacitive and inductive components 12 are one of main heat sources of the on-board charger 10. The plurality of capacitive and inductive components 12 are arranged in a direction of a plane of the first circuit board 11. Because the plurality of capacitive and inductive components 12 are arranged in a direction of a thickness of the first circuit board 11, the plurality of capacitive and inductive components 12 are respectively cooled by the coolant flowing in the internal flow channel of the cover plate, so that the on-board charger 10 can work reliably.

[0115] In one embodiment, the on-board charger 10 includes a small circuit board 13. The small circuit board 13 has an area smaller than that of the first circuit board 11. The small circuit board 13 is used to fix some electrical components of the on-board charger 10. The first circuit board 11, the small circuit board 13 and the electrical cover plate 40 are arranged in a direction of a height of the on-board device 100 in sequence, some electrical components of the on-board charger 10 are fixed to a surface of the small circuit board 13 facing the electrical cover plate 40, and a projection area of the plurality of capacitive and inductive components 12 is covered by the internal flow channel of the cover plate.

[0116] The electrical components of the on-board charger 10 fixed by the small circuit board 13 are used to form a DC conversion circuit of the on-board charger 10. In one embodiment, the small circuit board 13 is electrically connected to the first circuit board 11 through the plurality of capacitive and inductive components 12. The small circuit board 13 is used to fix electrical components of a secondary side circuit of the DC conversion circuit, and the first circuit board 11 is used to fix electrical components of a primary side circuit of the DC conversion circuit. The primary side circuit is used to receive a high-voltage direct current output by the power battery 201, and the on-board charger 10 outputs a low-voltage direct current to the second type of load 220 of the vehicle through the secondary side circuit after power conversion of the plurality of capacitive and inductive components 12 and the secondary side circuit.

[0117] In an embodiment, the small circuit board 13 is arranged adjacent to the plurality of capacitor and inductor components 12 in a planar direction of the vehicle-mounted device 100. The small circuit board 13 is arranged between the first circuit board 11 and the electric cover plate 40 in a height direction of the vehicle-mounted device 100. The plurality of capacitor and inductor components 12 have a smaller area in the planar direction of the vehicle-mounted device 100 than the first circuit board 11 and have a larger size in the height direction of the vehicle-mounted device 100. When the first circuit board 11, the plurality of capacitor and inductor components 12, and the electric cover plate 40 are arranged in the height direction of the vehicle-mounted device 100, a part of the area between the first circuit board 11 and the electric cover plate 40 is formed on the side of the plurality of capacitor and inductor components 12. By loading the partial electric components of the vehicle-mounted charger 10 on the small circuit board 13, the space area on the side of the plurality of capacitor and inductor components 12 can be reasonably utilized, the overall area of the vehicle-mounted charger 10 can be reduced, and the internal flow channel of the cover plate can reliably dissipate heat for the electric components of the plurality of capacitor and inductor components 12 and the auxiliary circuit.

[0118] In an embodiment, the small circuit board 13, the plurality of capacitor and inductor components 12, and the connecting column 442 are sequentially arranged in a planar direction of the vehicle-mounted device 100. For ease of description, the arrangement direction of the small circuit board 13 and the plurality of capacitor and inductor components 12 in subsequent embodiments of the present application is defined as the first direction 001. The first direction 001 is a planar direction of the vehicle-mounted device 100.

[0119] The electric cover plate 40 is connected to the liquid cooling heat dissipation plate 50 through the connecting column 442. Part of the cooling water entering the internal flow channel of the cover plate from the cover plate water channel inlet 401 flows into the liquid cooling heat dissipation plate 50 through the connecting column 442, and the other part flows through the projected area of the plurality of capacitor and inductor components 12 in the internal flow channel of the cover plate in sequence. The cooling water flowing from the cover plate water channel inlet 401 has a relatively low temperature, and the connecting column 442 is closer to the side of the plurality of capacitor and inductor components 12 than the cover plate water channel inlet 401, which can make the cooling water flowing into the liquid cooling heat dissipation plate 50 have a relatively low temperature, and the cooling water flowing to the plurality of capacitor and inductor components 12 also has a relatively low temperature, which is conducive to balancing the heat dissipation effect between the various electric components in the vehicle-mounted charger 10, reducing the temperature difference between the various electric components, and ensuring the temperature balance between the various electric components in the vehicle-mounted charger 10.

[0120] In an embodiment, the projected area of the plurality of capacitor and inductor components 12 partially overlaps the projected area of the plurality of power modules 14 in the height direction of the vehicle-mounted device 100.

[0121] Please refer to Figure 13 the partial structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application, andFigure 14 An exploded structural schematic diagram of the vehicle-mounted device 100 according to an embodiment of the present application is shown.

[0122] In an embodiment, the electric cover plate 40 comprises a cooling groove 42 and a cooling cover plate 43. The cooling groove 42 is distributed on the side of the electric cover plate 40 away from the electric accommodating groove 31. The cooling cover plate 43 is used to enclose the cooling groove 42 to form an internal flow channel of the cover plate. The groove bottom of the cooling groove 42 comprises a first through hole 421 and a second through hole 422. The first through hole 421 and the second through hole 422 respectively pass through the groove bottom of the cooling groove 42. The first through hole 421 is used to communicate with the inlet 51 of the liquid cooling heat sink 50. The second through hole 422 is used to communicate with the outlet 52 of the liquid cooling heat sink 50.

[0123] In the embodiment, the opening direction of the cooling groove 42 of the electric cover plate 40 is the same as the opening direction of the electric accommodating groove 31. The cooling cover plate 43 covers the cooling groove 42 to enclose and form an internal flow channel of the cover plate. When an accidental leakage occurs, the cooling water seeps out in the direction away from the electric accommodating groove 31, which can protect the electrical components in the electric accommodating groove 31. The cooling groove 42 also communicates with the liquid cooling heat sink 50 through the first through hole 421 and the second through hole 422, so as to circulate and deliver the cooling water to the liquid cooling heat sink 50.

[0124] In the embodiment of the present application, the internal flow channel of the cover plate is constituted by the cooling groove 42 and the cooling cover plate 43 of the electric cover plate 40. That is, the structure enclosed by the cooling groove 42 and the cooling cover plate 43 is the structure of the internal flow channel. Therefore, the internal flow channel of the cover plate is no longer separately shown by reference numerals.

[0125] In an embodiment, the opening of the cooling groove 42 is away from the integrated housing 30, that is, the opening direction of the cooling groove 42 is along the height direction of the vehicle-mounted device 100 and away from the electric accommodating groove 31. When the cooling cover plate 43 is not tightly sealed with the cooling groove 42, because the opening of the cooling groove 42 is away from the electric accommodating groove 31, the leakage of the cooling water towards the inside of the electric accommodating groove 31 can be avoided, so as to protect the components of the power supply integrated module such as the vehicle-mounted charger 10 and the motor controller 20.

[0126] The cooling groove 42 of the electric cover plate 40 can be formed by machining, and the cooling cover plate 43 can also be obtained by machining, so as to reduce the overall machining cost of the electric cover plate 40. In an embodiment, the cooling groove 42 is formed by pressure casting.

[0127] In one embodiment, the electrical cover plate 40 includes a ring-shaped baffle 44 and a plurality of circuit board support posts 45. The ring-shaped baffle 44 and the plurality of circuit board support posts 45 extend from the electrical cover plate 40 toward the bottom of the electrical accommodation groove 31 in the height direction of the vehicle-mounted device 100. The plurality of circuit board support posts 45 have an extension length smaller than that of the ring-shaped baffle 44, and the ring-shaped baffle 44 is arranged to surround the periphery of the plurality of circuit board support posts 45.

[0128] The plurality of circuit board support posts 45 are used to fix the first circuit board 11 of the vehicle-mounted charger 10, and the first circuit board 11 is used to fix the electrical components of the vehicle-mounted charger 10. The ring-shaped baffle 44 is used to fix the liquid cooling heat sink 50. The circuit board support posts 45 have a length smaller than that of the columnar reinforcing ribs 441, and the vehicle-mounted charger 10 is closer to the electrical cover plate 40 than the liquid cooling heat sink 50. Thus, the liquid cooling heat sink 50, the vehicle-mounted charger 10, and the electrical cover plate 40 are sequentially stacked in the height direction of the vehicle-mounted device 100, and the vehicle-mounted charger 10 is fixed between the liquid cooling heat sink 50 and the electrical cover plate 40.

[0129] In one embodiment, the ring-shaped baffle 44 includes a plurality of columnar reinforcing ribs 441, which are arranged in the ring-shaped baffle 44 along the extension path of the plurality of circuit board support posts 45. The plurality of columnar reinforcing ribs 441 are used to improve the structural stability of the ring-shaped baffle 44. The ring-shaped baffle 44 also fixes the liquid cooling heat sink 50 through the plurality of columnar reinforcing ribs 441. The electrical components and the first circuit board 11 of the vehicle-mounted charger 10 are accommodated in the ring-shaped baffle 44, and the ring-shaped baffle 44 is used to protect the vehicle-mounted charger 10.

[0130] The ring-shaped baffle 44 includes a connecting post 442, which has a cross-sectional size larger than that of the other columnar reinforcing ribs 441. The electrical cover plate 40 is used to connect the liquid cooling heat sink 50 through the connecting post 442.

[0131] In one embodiment, the connecting post 442 includes a bottom surface 4421. The bottom surface 4421 of the connecting post 442 faces the water cooling radiator 60 in the height direction of the vehicle-mounted device 100, and is used to abut the liquid cooling heat sink 50. Because the bottom surface 4421 of the connecting post 442 is parallel to the planar direction of the vehicle-mounted device 100, the area of the bottom surface 4421 of the connecting post 442 is relatively large. The abutment of the connecting post 442 and the liquid cooling heat sink 50 through the bottom surface 4421 can increase the contact area between the connecting post 442 and the liquid cooling heat sink 50, and ensure reliable fixation between the connecting post 442 and the liquid cooling heat sink 50.

[0132] Thus, the first through hole 421 and the second through hole 422 pass through the bottom surface 4421 of the connecting column 442. The first through hole 421 is used to communicate with the inlet 51 of the liquid cooling heat sink 50, and the second through hole 422 is used to communicate with the outlet 52 of the liquid cooling heat sink 50. The first through hole 421 and the second through hole 422 are used to extend to the groove bottom of the cooling groove 42 along the height direction of the vehicle-mounted device 100, respectively.

[0133] The cooling water in the cooling groove 42 can be input into the inlet 51 of the liquid cooling heat sink 50 through the first through hole 421, and then output from the outlet 52 of the liquid cooling heat sink 50 through the second through hole 422 and back into the cooling groove 42, forming a circulating flow of cooling water in the liquid cooling heat sink 50.

[0134] In the planar direction of the vehicle-mounted device 100, the area of the bottom surface 4421 of the connecting column 442 is relatively large, and the area of the bottom surface 4421 of the connecting column 442 that is in contact with the liquid cooling heat sink 50 is correspondingly large. By using the two through holes on the bottom surface 4421 of the connecting column 442 to communicate with the inlet 51 and the outlet 52 of the liquid cooling heat sink 50, respectively, the reliable sealing between the connecting column 442 and the liquid cooling heat sink 50 is facilitated.

[0135] In subsequent embodiments of the present application, the first through hole 421 and the second through hole 422 are also arranged along the second direction 002. The second direction 002 intersects the first direction 001. In the illustrated embodiment, the second direction 002 is perpendicular to the first direction 001.

[0136] In one embodiment, along the second direction 002, the second through hole 422, the first through hole 421, the third through hole 423, and the fourth through hole 424 are sequentially and spacedly arranged. Thus, the first through hole 421 is closer to the cover plate waterway inlet 401 of the vehicle-mounted device 100 than the second through hole 422 along the second direction 002. After the cooling water enters the cover plate internal flow channel from the third through hole 423, it can first enter the inlet 51 of the liquid cooling heat sink 50 through the first through hole 421. At this time, the temperature of the cooling water is relatively low, thereby improving the heat dissipation effect of the liquid cooling heat sink 50. In combination with the flow path setting of the cover plate internal flow channel, the cooling water flowing out of the second through hole 422 flows into the internal water inlet passage through the fourth through hole 424. This part of the cooling water can flow through the orthographic projection area of the plurality of capacitor assemblies and inductor assemblies 12 on the electrical cover plate 40, so as to ensure the heat dissipation effect of the cover plate internal flow channel on the vehicle-mounted charger 10.

[0137] In one embodiment, the vehicle charger 10, the first through hole 421 and the second through hole 422, and the third through hole 423 are sequentially and spacedly arranged along the first direction 001. That is, the first through hole 421 and the second through hole 422 are arranged between the vehicle charger 10 and the third through hole 423 along the first direction 001. Since the first through hole 421 and the second through hole 422 are both located in the projection area of the connecting column 442, i.e., the connecting column 442 is closer to the cover waterway inlet 401 of the electrical cover plate 40 than the vehicle charger 10, after the cooling water enters the cover internal flow channel from the cover waterway inlet 401, the cooling water can enter the liquid cooling heat dissipation plate 50 through the first through hole 421 on the connecting column 442 to cool the vehicle charger 10. At this time, the temperature of the cooling water is relatively low, which can improve the heat dissipation effect of the liquid cooling heat dissipation plate 50.

[0138] Please refer to Figure 15 the partial structure schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application.

[0139] In one embodiment, the side of the liquid cooling heat dissipation plate 50 facing the electrical cover plate 40 is used to fix the heat dissipation plate water nozzle 53, and the heat dissipation plate water nozzle 53 includes a first communication waterway 531 and a second communication waterway 532. The first communication waterway 531 is used to communicate the inlet 51 of the liquid cooling heat dissipation plate 50 and the first through hole 421, and the second communication waterway 532 is used to communicate the outlet 52 of the liquid cooling heat dissipation plate 50 and the second through hole 422.

[0140] In the present embodiment, the liquid cooling heat dissipation plate 50 is parallel and spacedly arranged with the electrical cover plate 40, and the heat dissipation plate water nozzle 53 is fixed to the side of the liquid cooling heat dissipation plate 50 facing the electrical cover plate. Along the direction in which the electrical cover plate 40 and the liquid cooling heat dissipation plate 50 are stacked and arranged, one end of the heat dissipation plate water nozzle 53 is used to communicate the inlet 51 and the outlet 52 of the liquid cooling heat dissipation plate 50, and the other end of the heat dissipation plate water nozzle 53 is used to communicate the first through hole 421 and the second through hole 422, so as to introduce the cooling water from the electrical cover plate 40 into the liquid cooling heat dissipation plate 50.

[0141] Please refer to Figure 16 the partial structure schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application, Figure 17 the exploded structure schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application.

[0142] In one embodiment, the two ends of the water nozzle 53 of the heat sink are arranged along the stacking direction of the electrical cover plate 40 and the liquid-cooled heat sink 50, and the two ends of the water nozzle 53 of the heat sink respectively include two grooves. For ease of description, one of the grooves is defined as a first groove and the other groove is defined as a second groove in the embodiment. The inlet of the first communication channel 531 and the outlet of the second communication channel 532 are arranged at the bottom of the first groove, the first groove is used to cover the first through hole 421 and the second through hole 422, the inlet of the first communication channel 531 is used to connect the first through hole 421, and the outlet of the second communication channel 532 is used to connect the second through hole 422. The outlet of the first communication channel 531 and the inlet of the second communication channel 532 are arranged at the bottom of the second groove, the second groove is used to cover the inlet 51 of the liquid-cooled heat sink 50 and the outlet 52 of the liquid-cooled heat sink 50, the outlet of the first communication channel 531 is used to connect the inlet 51 of the liquid-cooled heat sink 50, and the inlet of the second communication channel 532 is used to connect the outlet 52 of the liquid-cooled heat sink 50.

[0143] In the embodiment, the two ends of the water nozzle 53 of the heat sink are respectively connected to the liquid-cooled heat sink 50 and the electrical cover plate 40 through the two grooves, so as to realize the circulating flow of the cooling water between the liquid-cooled heat sink 50 and the electrical cover plate 40. The first groove is used to accommodate the inlet 51 and the outlet 52 of the liquid-cooled heat sink 50, and a sealing fit can be formed between the groove wall of the first groove and the inlet 51 and the outlet 52 of the liquid-cooled heat sink 50. The second groove is used to connect the first through hole 421 and the second through hole 422, and a sealing fit can be formed between the groove wall of the second groove and the first through hole 421 and the second through hole 422. The two grooves are used to prevent the leakage of the cooling water in the electrical accommodation groove 31.

[0144] In one embodiment, the second groove can also be formed on one side of the electrical cover plate 40. At this time, the electrical cover plate 40 accommodates the water nozzle 53 of the heat sink through the structure of the second groove, and a sealing fit is formed between the groove wall of the second groove and the outer wall of the water nozzle 53 of the heat sink, so as to achieve the effect of sealing connection. It can be understood that in some embodiments, the first groove can also be formed on one side of the liquid-cooled heat sink 50, and a sealing fit is formed between the groove wall of the first groove and the outer wall of the water nozzle 53 of the heat sink.

[0145] Please refer to Figure 18 the partial structure schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the application, Figure 19 the partial structure schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the application.

[0146] In an embodiment, the groove bottom of the cooling groove 42 further comprises a third through hole 423, a fourth through hole 424, and a first partition protrusion 425. The third through hole 423 is used to communicate with the cover plate water channel inlet 401. The fourth through hole 424 is used to communicate with the cover plate water channel outlet 402. The first partition protrusion 425 is used to partition the third through hole 423 and the fourth through hole 424 to form a U-shaped flow channel.

[0147] In the present embodiment, the first partition protrusion 425 is used to form a U-shaped flow channel in the internal flow channel of the cover plate, thereby increasing the flow path of the cooling water in the internal flow channel of the cover plate, so that the cooling water can form more sufficient heat exchange with the vehicle-mounted charging machine 10 to improve the heat dissipation effect of the electrical cover plate 40.

[0148] In an embodiment, the groove bottom of the cooling groove 42 further comprises a second partition protrusion 426. The second partition protrusion 426 is used to partition the first through hole 421 and the second through hole 422. The third through hole 423 and the first through hole 421 are arranged between the first partition protrusion 425 and the second partition protrusion 426. The first through hole 421 and the third through hole 423 are arranged on one side of the second partition protrusion 426. The second through hole 422 is arranged on the other side of the second partition protrusion 426.

[0149] In the present embodiment, the third through hole 423 and the first through hole 421 are arranged between the first partition protrusion 425 and the second partition protrusion 426. The second partition protrusion 426 is used to partition the first through hole 421 and the second through hole 422. The cooling water entering the internal flow channel of the cover plate from the cover plate water channel inlet 401 through the third through hole 423 first flows into the liquid cooling heat sink 50 from the first through hole 421, and then flows back to the internal flow channel of the cover plate from the second through hole 422, and then flows into the shell water channel inlet 301 from the cover plate water channel outlet 402. Such an arrangement can ensure that the cooling water flowing into the liquid cooling heat sink 50 has a lower temperature, thereby improving the heat dissipation effect of the liquid cooling heat sink 50 on the plurality of power modules 14.

[0150] In an embodiment, the groove bottom of the cooling groove 42 further comprises a plurality of heat dissipation teeth 427 and a plurality of flow guide teeth 428. The plurality of heat dissipation teeth 427 are distributed on both sides of the first partition protrusion 425. The plurality of flow guide teeth 428 are distributed on both sides of the first partition protrusion 425. At least one of the number, shape, or arrangement of the flow guide teeth 428 or the heat dissipation teeth 427 on both sides of the first partition protrusion 425 is different.

[0151] In the embodiment, the plurality of heat dissipation fins 427 are used to slow down the flow rate of the cooling water in the internal flow channel of the cover plate to improve the heat exchange effect when the cooling water flows through the plurality of heat dissipation fins 427, and the plurality of flow guide fins 428 are used to guide the cooling water to flow along the flow path in the internal flow channel of the cover plate. The plurality of heat dissipation fins 427 and the plurality of flow guide fins 428 are alternately arranged in the internal flow channel of the cover plate, and can form heat dissipation areas of different numbers, different sizes and different regions in the internal flow channel of the cover plate, and match the number, shape and position of the electrical components of the vehicle-mounted charging machine 10 through the respective heat dissipation areas.

[0152] In an embodiment, each heat dissipation fin 427 includes a plurality of columnar protrusions, and the plurality of columnar protrusions are arranged in an array in the plane direction of the electrical cover plate 40. The cooling water generates a large amount of turbulence when flowing through the plurality of columnar protrusions, thereby promoting heat exchange between the cooling water and balancing the temperature of the cooling water flowing through the heat dissipation fins 427.

[0153] In an embodiment, each flow guide fin 428 includes a plurality of strip-shaped convex ribs, each strip-shaped convex rib extends in a direction substantially parallel to the flow path of the second through hole 422 to the fourth through hole 424, and the plurality of strip-shaped convex ribs are arranged in a spaced manner perpendicular to the flow path of the second through hole 422 to the fourth through hole 424. The cooling water has a small flow resistance when flowing through the plurality of strip-shaped convex ribs, and can flow through the flow guide fin 428 quickly.

[0154] The plurality of heat dissipation fins 427 and the plurality of flow guide fins 428 are arranged in a spaced manner along the flow path of the second through hole 422 to the fourth through hole 424, which can balance the temperature difference and flow rate of the cooling water and ensure the heat dissipation effect of the cooling water on the plurality of capacitor components and inductor components 12 and the electrical components of the secondary side circuit.

[0155] In an embodiment, along the height direction of the vehicle-mounted device 100, the orthographic projection of each capacitor component and inductor component 12 overlaps at least one heat dissipation fin 427.

[0156] In an embodiment, along the height direction of the vehicle-mounted device 100, the orthographic projection of part of the electrical components of the secondary side circuit overlaps at least one heat dissipation fin 427. In an embodiment, the arrangement direction of the second through hole 422 and the fourth through hole 424, and the two sides of the flow guide structure respectively include at least one flow guide fin 428. In an embodiment, along the second direction 002, the two sides of the flow guide structure respectively include at least one heat dissipation fin 427.

[0157] In one embodiment, a gap 429 is formed between a section of the first partition protrusion 425 and the second partition protrusion 426. The gap 429 is located on the side of the flow guide structure close to the second through hole 422 along the arrangement direction of the second through hole 422 and the fourth through hole 424. That is, the gap 429 is located between the second through hole 422 and the flow guide structure along the second direction 002. Thus, part of the cooling water entering from the third through hole 423 can directly flow into the internal flow channel of the cover plate through the gap 429. The temperature of this part of the cooling water is relatively low. After this part of the cooling water meets the cooling water flowing out of the liquid cooling heat sink 50, the heat dissipation effect of the internal flow channel of the cover plate on the plurality of capacitor assemblies and inductor assemblies 12 and the electrical components of the secondary side circuit can be improved, and then the cooling water flows through the flow path from the second through hole 422 to the fourth through hole 424 to flow into the internal flow channel of the bottom shell.

[0158] Please refer to Figure 20 the partial cross-sectional view of the vehicle-mounted device 100 provided by one embodiment of the present application, Figure 21 the partial structural view of the vehicle-mounted device 100 provided by one embodiment of the present application, and Figure 22 the exploded structural view of the vehicle-mounted device 100 provided by one embodiment of the present application.

[0159] In one embodiment, the electrical accommodation groove 31 is also used to accommodate the water-cooled heat sink 60 and the second circuit board 21. The water-cooled heat sink 60 is used to receive the cooling water input by the housing water channel inlet 301, and the second circuit board 21 is used to control the three-phase inverter circuit in the electrical components of the motor controller 20, which includes the bus capacitor module 22 and a plurality of power modules. In this embodiment, in order to distinguish the power modules of the vehicle-mounted charger 10, the plurality of power modules fixed by the second circuit board 21 are defined as the second power modules 23. The first circuit board 11, the liquid-cooled heat sink 50, the second circuit board 21, the water-cooled heat sink 60, and the bus capacitor module 22 in the electrical accommodation groove 31 are arranged in layers between the electrical cover plate 40 and the groove bottom of the electrical accommodation groove 31, the bus capacitor module 22 is used to fix the second circuit board 21 and the water-cooled heat sink 60, and the plurality of second power modules 23 are arranged between the second circuit board 21 and the water-cooled heat sink 60.

[0160] In this embodiment, the motor controller 20 is arranged between the groove bottom of the electrical accommodation groove 31 and the liquid-cooled heat sink 50. The water-cooled heat sink 60 is used to dissipate heat from the plurality of second power modules 23 of the motor controller 20 to ensure reliable operation of the motor controller 20. The water-cooled heat sink 60 is used to receive the cooling water input by the electrical cover plate 40 through the housing water channel inlet 301 of the integrated housing 30.

[0161] Thus, the vehicle-mounted device 100 provided by the application comprises a liquid cooling heat sink 50 and a water cooling heat sink 60. The liquid cooling heat sink 50 is used to cool the vehicle-mounted charger 10, and the water cooling heat sink 60 is used to cool the motor controller 20. In different working scenarios of the vehicle-mounted device 100 provided by the application, the vehicle-mounted charger 10 and the motor controller 20 will continuously generate heat respectively, and the liquid cooling heat sink 50 and the water cooling heat sink 60 are respectively used to cool the vehicle-mounted charger 10 and the motor controller 20, so that the reliable working of the vehicle-mounted device 100 provided by the application can be ensured.

[0162] In the embodiment of the application, the arrangement direction of the integrated shell 30 and the electrical cover plate 40 is defined as the height direction of the vehicle-mounted device 100, and the direction perpendicular to the height direction of the vehicle-mounted device 100 is defined as the plane direction of the vehicle-mounted device 100. The vehicle-mounted charger 10 and the motor controller 20 in the electrical accommodating groove 31 are arranged at intervals along the height direction of the vehicle-mounted device 100. The vehicle-mounted charger 10 is located between the electrical cover plate 40 and the motor controller 20.

[0163] Along the height direction of the vehicle-mounted device 100, the water cooling heat sink 60, the liquid cooling heat sink 50 and the electrical cover plate 40 are sequentially stacked and arranged. The integrated shell 30 is used to fix the water cooling heat sink 60 and the electrical cover plate 40, and the electrical cover plate 40 is used to fix the vehicle-mounted charger 10 and the liquid cooling heat sink 50.

[0164] The vehicle-mounted device 100 provided by the application is used to communicate with the circulating refrigeration system of the electric vehicle 200 through the cover plate waterway inlet 401 and the shell waterway outlet 302, and is used to communicate with the liquid cooling heat sink 50 and the water cooling heat sink 60 in the shell, so that the liquid cooling heat sink 50 and the water cooling heat sink 60 form the circulating cooling effect on the vehicle-mounted charger 10 and the motor controller 20 respectively.

[0165] In one embodiment, the integrated shell 30 comprises a bottom plate 32 and a plurality of side plates 33. The bottom plate 32 and the side plates 33 are used to enclose the electrical accommodating groove 31. The bottom plate 32 is used to form the groove bottom of the electrical accommodating groove 31, and each side plate 33 is used to form the groove wall of the electrical accommodating groove 31. Along the height direction of the vehicle-mounted device 100, the bottom plate 32 is arranged at intervals with the electrical cover plate 40, and the bottom plate 32 is located on the side of the water cooling heat sink 60 away from the electrical cover plate 40. The distance between the bottom plate 32 and the electrical cover plate 40 is the height dimension of the electrical accommodating groove 31. The side plates 33 are arranged between the bottom plate 32 and the electrical cover plate 40, and the side plates 33 are used to fixedly connect the bottom plate 32 and the electrical cover plate 40, that is, the bottom plate 32 supports the electrical cover plate 40, the vehicle-mounted charger 10 and the liquid cooling heat sink 50 fixed by the electrical cover plate 40 through the side plates 33.

[0166] The bottom plate 32 is used to fixedly connect the water-cooled radiator 60 and the motor controller 20. Specifically, the bottom plate 32 includes two columns, which extend towards the water-cooled radiator 60 along the height direction of the vehicle-mounted device 100. The water-cooled radiator 60 is embedded in the motor controller 20 along the height direction of the vehicle-mounted device 100. The two columns are used to fixedly connect the water-cooled radiator 60 and support the motor controller 20 through the water-cooled radiator 60.

[0167] Please refer to Figure 23 the partial cross-sectional view of the vehicle-mounted device 100 provided by an embodiment of the application, Figure 24 the partial cross-sectional view of the vehicle-mounted device 100 provided by an embodiment of the application, and Figure 25 the partial cross-sectional view of the vehicle-mounted device 100 provided by an embodiment of the application.

[0168] In an embodiment, the bottom of the electrical accommodating groove 31 further includes a first bottom groove waterway interface 311 and a second bottom groove waterway interface 312. The inlet 61 of the water-cooled radiator 60 is used to receive the cooling water input by the housing waterway inlet 301 through the first bottom groove waterway interface 311, and the second bottom groove waterway interface 312 is used to receive the cooling water output by the outlet 62 of the water-cooled radiator 60. The direction of the first bottom groove waterway interface 311 and the direction of the second bottom groove waterway interface 312 are the same as the direction of the groove opening of the electrical accommodating groove 31, the direction of the inlet 61 of the water-cooled radiator 60 and the direction of the outlet 62 of the water-cooled radiator 60 are opposite to the direction of the groove opening of the electrical accommodating groove 31, the inlet 61 of the water-cooled radiator 60 is used to be embedded in the first bottom groove waterway interface 311, and the outlet 62 of the water-cooled radiator 60 is used to be embedded in the second bottom groove waterway interface 312.

[0169] In the embodiment, the integrated housing 30 is used to communicate with the water-cooled radiator 60 through the first bottom groove waterway interface 311 and the second bottom groove waterway interface 312. The first bottom groove waterway interface 311 and the second bottom groove waterway interface 312 respectively extend from the bottom of the electrical accommodating groove 31 towards the water-cooled radiator 60, and the inlet 61 and the outlet 62 of the water-cooled radiator 60 are respectively embedded in the first bottom groove waterway interface 311 and the second bottom groove waterway interface 312, so as to facilitate the formation of a sealed fit through the inner wall of the first bottom groove waterway interface 311 and the outer wall of the inlet of the water-cooled radiator 60, and the inner wall of the second bottom groove waterway interface 312 and the outer wall of the outlet of the water-cooled radiator 60, respectively, to prevent the leakage of cooling water in the electrical accommodating groove 31.

[0170] In an embodiment, the integrated housing 30 further comprises an internal water inlet channel for connecting the housing water inlet 301 and the first tank bottom water channel interface 311, an internal water outlet channel for connecting the second tank bottom water channel interface 312 and the housing water outlet 302. The housing water inlet 301 and the housing water outlet 302 are arranged on the same side of the electrical tank 31, and the housing water outlet 302 has a different direction from the housing water inlet 301.

[0171] In the embodiment, the integrated housing 30 transports the cooling water flowing into the housing water inlet 301 through the internal water inlet channel to the first tank bottom water channel interface 311, and transports the cooling water flowing out of the water-cooled radiator 60 through the internal water outlet channel to the water-cooled system of the electric vehicle 200. Because the housing water inlet 301 and the cover water inlet 401 are arranged on the same side of the electrical tank 31, the housing water outlet 302 and the cover water inlet 401 are also arranged on the same side of the electrical tank 31. The water pipes of the water-cooled system of the electric vehicle 200 are arranged on the same side of the housing of the on-board device 100 to input and receive the cooling water, respectively, and the two water pipes occupy the same side space of the housing of the on-board device 100, so that the overall width of the housing of the on-board device 100 can be controlled.

[0172] The liquid-cooled heat sink plate 50 and the water-cooled radiator 60 are in a plate shape, and the stacked liquid-cooled heat sink plate 50 and water-cooled radiator 60 can save the area of the on-board device 100, i.e., the area of the on-board device 100 in the planar direction is relatively small. The water-cooled radiator 60 has a large contact area with the motor controller 20, and the liquid-cooled heat sink plate 50 and the electrical cover 40 also have a large contact area with the on-board charger 10. The water-cooled radiator 60 and the liquid-cooled heat sink plate 50 can respectively form a good heat dissipation effect on the motor controller 20 and the on-board charger 10.

[0173] The on-board device 100 further utilizes the integrated housing 30 and the cover internal flow channel to form a cooling water channel to respectively connect the water-cooled radiator 60 and the liquid-cooled heat sink plate 50, so as to avoid additional setting of a cooling water pipeline in or outside the housing of the on-board device 100, thereby saving the overall volume of the on-board device 100.

[0174] In an embodiment, the on-board charger 10 is projected on the cover internal flow channel in the height direction of the on-board device 100. Thus, the cover internal flow channel can be used to dissipate heat from the on-board charger 10, and the electrical cover 40 and the liquid-cooled heat sink plate 50 can dissipate heat from the on-board charger 10 from both sides, thereby further improving the heat dissipation capacity of the on-board device 100.

[0175] In one embodiment, the electrical cover plate 40 is used to fix a water channel communication assembly 70, the water channel communication assembly 70 includes two ends, one end of the two ends of the water channel communication assembly 70 is used to enclose the cover plate water channel inlet 401, the other end of the two ends of the water channel communication assembly 70 is used to receive the cooling water delivered by the water cooling system of the electric vehicle 200 through the water pipe, and the shell water channel outlet 302 of the integrated shell 30 is used to deliver the cooling water to the water cooling system of the electric vehicle 200 through the water pipe.

[0176] In this embodiment, the electrical cover plate 40 is generally plate-shaped, and the electrical cover plate 40 is in communication with the water pipe of the water cooling system through a water channel communication assembly 70, which facilitates the formation of a sealing fit between the water channel communication assembly 70 and the water pipe. The shell water channel outlet 302 can be configured in the form of a water nozzle, thereby directly communicating with and sealingly fitting the water pipe of the water cooling system.

[0177] Please refer to Figure 26 the structural schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application, Figure 27 the exploded structural schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application, Figure 28 the structural schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application, Figure 29 the exploded structural schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the present application.

[0178] In one embodiment, the vehicle-mounted device 100 further includes a driving motor 202 and a speed reducer, the shell of the vehicle-mounted device 100 further includes a motor end cover 34 and a speed reducer end cover 35, and the integrated shell 30 further includes a motor accommodating groove 341 and a speed reducer accommodating groove 351. The motor accommodating groove 341 is used to fix and accommodate the stator of the driving motor 202, and the motor end cover 34 is used to enclose the motor accommodating groove 341. The speed reducer accommodating groove 351 is used to accommodate the gear set of the speed reducer, and the speed reducer end cover 35 is used to enclose the speed reducer accommodating groove 351. Among them, the motor accommodating groove 341 and the speed reducer accommodating groove 351 are arranged adjacent to each other along the axial direction of the driving motor 202, the orientation of the slot opening of the motor accommodating groove 341 is opposite to the orientation of the slot opening of the speed reducer accommodating groove 351, and the orientation of the slot opening of the electrical accommodating groove 31 is perpendicular to the orientation of the slot opening of the motor accommodating groove 341 and the orientation of the slot opening of the speed reducer accommodating groove 351.

[0179] In this embodiment, the integrated shell 30 of the vehicle-mounted device 100 of the present application further includes a motor accommodating groove 341 and a speed reducer accommodating groove 351, the integrated shell 30 is used to fix the stator of the driving motor 202, the motor end cover 34 and the speed reducer end cover 35 are used to fix the transmission shaft of the speed reducer through bearings, the motor accommodating groove 341 is used to accommodate the driving motor 202, and the speed reducer accommodating groove 351 is used to accommodate the gear set of the speed reducer.

[0180] Thus, in the present embodiment, the vehicle-mounted device 100 also integrates the power assembly of the electric vehicle 200. That is, the vehicle-mounted device integrates the power assembly, the on-board charger 10, and the motor controller 20, and the integration degree of the vehicle-mounted device 100 of the present application is further improved. The on-board charger 10 and the motor controller 20 are integrated, which facilitates the on-board charger 10 to receive power supply from the power battery 201 and deliver to the motor controller 20. The motor controller 20 is integrated with the drive motor 202, which facilitates the motor controller 20 to output three-phase alternating current to drive the drive motor 202, and the drive motor 202 outputs driving force through the reducer to drive the electric vehicle 200.

[0181] In an embodiment, the housing of the vehicle-mounted device 100 is also integrated with the housing of the drive motor 202. The integrated housing 30 extends away from the electrical cover plate 40 and forms a motor accommodating groove 341. The inner wall of the motor accommodating groove 341 is used to fix the motor stator of the drive motor 202, and the motor accommodating groove 341 is used to accommodate the drive motor 202. Such a structure can improve the integration degree of the vehicle-mounted device 100 and save the internal space of the electric vehicle 200.

[0182] In an embodiment, the housing of the vehicle-mounted device 100 is also integrated with the housing of the reducer. The integrated housing 30 extends away from the electrical cover plate 40 and forms a reducer accommodating groove 351. The reducer accommodating groove 351 is also used to accommodate a gear set. The gear set is used to drive connect the motor shaft of the drive motor 202. In the present embodiment, the housing of the vehicle-mounted device 100 is integrated with the housing of the power assembly, which further improves the integration degree of the vehicle-mounted device 100 and saves the internal space of the electric vehicle 200.

[0183] The opening direction of the motor accommodating groove 341 is opposite to the opening direction of the reducer accommodating groove 351, the drive motor 202 is arranged adjacent to the reducer along the axial direction of the drive motor 202, which reduces the length of the vehicle-mounted device 100 along the axial direction of the drive motor 202. The opening direction of the electrical accommodating groove 31 is perpendicular to the opening direction of the motor accommodating groove 341 and the opening direction of the reducer accommodating groove 351, the electrical cover plate 40 of the vehicle-mounted device 100 is parallel to the axial direction of the drive motor 202 and is closer to the axial line of the drive motor 202, which reduces the height of the vehicle-mounted device 100 along the direction perpendicular to the electrical cover plate 40. The overall volume of the vehicle-mounted device 100 of the present application is further reduced.

[0184] Please refer to Figure 30 the structural schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application, Figure 31 the structural schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the present application.

[0185] In one embodiment, the side plate 33 is used to form the groove wall of the electrical accommodation groove 31. The groove wall of the electrical accommodation groove 31 includes a first section groove wall 331, a second section groove wall 332, a third section groove wall 333 and a fourth section groove wall 334. The first section groove wall 331 and the second section groove wall 332 are arranged opposite along the axial direction of the drive motor 202, and the third section groove wall 333 and the fourth section groove wall 334 are arranged opposite along the direction perpendicular to the axial direction of the drive motor 202. The distance between the first section groove wall 331 and the slot opening of the motor accommodation groove 341 is greater than the distance between the second section groove wall 332 and the slot opening of the motor accommodation groove 341, the distance between the third section groove wall 333 and the motor shaft of the drive motor 202 is less than the distance between the fourth section groove wall 334 and the motor shaft of the drive motor 202, the power battery interface 101 of the vehicle-mounted device 100 is distributed on the first section groove wall 331, the load power supply interface 102 of the vehicle-mounted device 100 is distributed on the second section groove wall 332, the control signal interface 103 of the vehicle-mounted device 100 is distributed on the third section groove wall 333, and the housing waterway outlet 302 and the housing waterway inlet 301 are distributed on the outer side of the fourth section groove wall 334.

[0186] In this embodiment, the second section groove wall 332 and the first section groove wall 331 are arranged in sequence in the direction from the motor end cover 34 to the reducer end cover 35. The vehicle-mounted device 100 receives power supply from or supplies power to the power battery through the power battery interface 101 on the first section groove wall 331, and the vehicle-mounted device 100 supplies power to the load of the electric vehicle 200 through the load power supply interface 102 on the second section groove wall 332.

[0187] Along the direction perpendicular to the axial direction of the drive motor 202, the fourth section groove wall 334 is offset to one side of the drive motor 202 relative to the third section groove wall 333, the fourth section groove wall 334 and the output wheel used for output power in the gear set of the reducer are arranged adjacent along the axial direction of the drive motor 202, and the electrical accommodation groove 31 can fully utilize the space on the side of the drive motor 202 toward the output wheel of the reducer to reduce the overall width size of the vehicle-mounted device 100. The vehicle-mounted device 100 receives or sends the control signal of the electric vehicle 200 through the control signal interface 103 on the third section groove wall 333, and the vehicle-mounted device 100 receives the cooling water delivered by the cooling system through the cover plate waterway inlet 401 on the fourth section groove wall 334 and is used to deliver the cooling water to the cooling system through the housing waterway outlet 302 on the fourth section groove wall 334.

[0188] Please refer to Figure 32 the partial structure schematic diagram of the vehicle-mounted device 100 provided by one embodiment of the application.

[0189] In one embodiment, the groove bottom of the cooling groove 42 includes two regions. Figure 32The first region 42A and the second region 42B are defined. The first region 42A and the second region 42B are arranged adjacent along the first direction 001. The orthographic projection of the plurality of capacitive components and inductive components 12 is accommodated in the first region 42A. The orthographic projection of the electrical components of the secondary side circuit is accommodated in the second region 42B.

[0190] Along the height direction of the vehicle-mounted device 100, the groove depth of the first region 42A of the cooling groove 42 is less than the groove depth of the second region 42B. In the embodiment, by setting the groove bottom of the second region 42B of the cooling groove 42 of the electrical cover plate 40 to be sunken towards the small circuit board 13, the distance between the internal flow channel of the cover plate and the electrical components of the secondary side circuit can be reduced, and the electrical cover plate 40 can form a better heat dissipation effect on the electrical components of the secondary side circuit.

[0191] Please refer to Figure 33 the partial structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the application, Figure 34 the partial structure schematic diagram of the vehicle-mounted device 100 provided by an embodiment of the application.

[0192] The internal water inlet channel includes the internal flow channel of the side plate 33 and the internal flow channel of the bottom plate 32. The side plate 33 is used for fixedly connecting the bottom plate 32 and the electrical cover plate 40, and the internal flow channel of the side plate 33 is used for connecting the cover plate waterway outlet 402 and the internal flow channel of the bottom plate 32. Specifically, the side plate 33 includes a top surface facing the electrical cover plate 40, and the top surface of the side plate 33 is used for abutting and fixedly connecting with the bottom surface of the electrical cover plate 40. The top surface of the side plate 33 includes the housing waterway inlet 301. In the embodiment, the internal flow channel of the side plate 33 communicating with the housing waterway inlet 301 is defined as a first communication hole 335, that is, the first communication hole 335 is configured as a section of the internal water inlet channel. The first communication hole 335 is a blind hole, and the first communication hole 335 extends from the housing waterway inlet 301 towards the bottom plate 32 along the height direction of the vehicle-mounted device 100, and the first communication hole 335 is formed as a part of the internal flow channel of the side plate 33 and is used for communicating with the internal flow channel of the bottom plate 32.

[0193] Along the height direction of the vehicle-mounted device 100, the housing waterway inlet 301 is used for aligning with the cover plate waterway outlet 402, so as to realize the communication between the internal flow channel of the cover plate and the internal water inlet channel. Therefore, the internal flow channel of the bottom plate 32 also communicates with the cover plate waterway inlet 401 of the electrical cover plate 40 through the first communication hole 335.

[0194] The top surface of the side plate 33 is sealingly connected with the bottom surface of the electrical cover plate 40. In one embodiment, the outer edge of the housing waterway inlet 301 and the cover plate waterway outlet 402 comprises a sealing ring. The sealing ring is partially embedded in the top surface of the side plate 33 or partially embedded in the bottom surface of the electrical cover plate 40. When the electrical cover plate 40 is attached to the top surface of the side plate 33, the sealing ring is deformed by being squeezed to sealingly connect the top surface of the side plate 33 with the bottom surface of the electrical cover plate 40. The vehicle-mounted device 100 achieves the sealing connection between the internal flow channel of the cover plate and the internal water inlet channel simultaneously by assembling the electrical cover plate 40 with the integrated housing 30.

[0195] The bottom plate 32 supports the water-cooled heat sink 60 and the motor controller 20 through two columns. The first slot bottom waterway interface 311 and the second slot bottom waterway interface 312 are formed in the interior of the two columns, respectively. The internal flow channel of the bottom plate 32 is also used to connect the inlet 61 and the outlet 62 of the water-cooled heat sink 60 through the first slot bottom waterway interface 311 and the second slot bottom waterway interface 312. Specifically, each column forms a slot bottom waterway interface towards the top surface of the water-cooled heat sink 60. The slot bottom waterway interface is a blind hole, and the slot bottom waterway interface is used to extend from the top surface of the column towards the bottom plate 32 in the height direction of the vehicle-mounted device 100, and the internal flow channel of the bottom plate 32 is used to communicate the two slot bottom waterway interfaces, respectively.

[0196] The slot bottom waterway interface of one of the columns is used to accommodate and fix the inlet 61 of the water-cooled heat sink 60, and the slot bottom waterway interface of the other column is used to accommodate and fix the outlet 62 of the water-cooled heat sink 60. Specifically, for ease of description, the two columns of the bottom plate 32 are defined as the first column 361 and the second column 362, respectively. The first column 361 comprises the first slot bottom waterway interface 311, and the second column 362 comprises the second slot bottom waterway interface 312. The first column 361 is used to communicate the inlet 61 of the water-cooled heat sink 60 through the first slot bottom waterway interface 311, and the second column 362 is used to communicate the outlet 62 of the water-cooled heat sink 60 through the second slot bottom waterway interface 312.

[0197] The bottom plate 32 comprises two communication holes. In the embodiment of the present application, the two communication holes of the bottom plate 32 are defined as the second communication hole 321 and the third communication hole 322, respectively. The second communication hole 321 and the third communication hole 322 are blind holes, and the second communication hole 321 and the third communication hole 322 are used to extend from one side surface of the bottom plate 32 towards the interior of the bottom plate 32, respectively. In one embodiment, the second communication hole 321 and the third communication hole 322 extend from the side surface of the bottom plate 32 close to the side plate 33 having the first communication hole 335 towards the interior of the bottom plate 32. The extension direction of the second communication hole 321 and the third communication hole 322 is parallel to the first direction 001.

[0198] The second communication hole 321 and the third communication hole 322 are formed as internal flow channels of the bottom plate 32. The second communication hole 321 is used to form a section of the internal water inlet channel, and the third communication hole 322 is used to form a section of the internal water outlet channel. The second communication hole 321 is used to communicate the first communication hole 335 and the first slot bottom water channel interface 311, and the third communication hole 322 is used to communicate the second slot bottom water channel interface 312 and the shell water channel outlet 302.

[0199] Specifically, the second communication hole 321 extends along the first direction 001, and the first slot bottom water channel interface 311 and the first communication hole 335 respectively extend along the height direction of the vehicle-mounted device 100. The cooling water entering the first communication hole 335 from the cover plate internal flow channel can sequentially enter the inlet 61 of the water-cooled radiator 60 through the second communication hole 321 and the first slot bottom water channel interface 311.

[0200] The second slot bottom water channel interface 312 extends along the height direction of the vehicle-mounted device 100, and the third communication hole 322 extends along the first direction 001. The cooling water flowing out of the outlet 62 of the water-cooled radiator 60 can flow into the third communication hole 322 through the second slot bottom water channel interface 312, and then flow out of the internal water outlet channel through the shell water channel outlet 302.

[0201] The first slot bottom water channel interface 311, the second slot bottom water channel interface 312, and the first communication hole 335 can be respectively formed downward from the top surface of the first upright column 361, the top surface of the second upright column 362, and the top surface of the side plate 33. The second communication hole 321 and the third communication hole 322 are formed towards the inside of the bottom plate 32 from the side surface of the bottom plate 32 close to the side plate 33. The integrated shell 30 further includes a plug, which is used to seal the opening of the second communication hole 321 formed on the side surface of the bottom plate 32, so as to prevent the cooling water from leaking from the side surface of the bottom plate 32.

[0202] In an embodiment, the opening of the third communication hole 322 formed on the side surface of the bottom plate 32 can be configured as the shell water channel outlet 302 of the vehicle-mounted device 100. In another embodiment, the shell water channel outlet 302 is arranged on the side surface of the side plate 33, and the third communication hole 322 further communicates the shell water channel outlet 302 through the internal flow channel of the side plate 33. That is, the side plate 33 includes the shell water channel outlet 302, which is used to communicate the water-cooled radiator 60 through the internal flow channel of the side plate 33 and the internal flow channel of the bottom plate 32.

[0203] In the illustrated embodiment, the bottom plate 32 includes a boss 37. The boss 37 is located between the side plate 33 and the water-cooling radiator 60 along the first direction 001. The boss 37 is connected with the side plate 33, and the boss 37 includes two communication holes, one of which extends along the first direction 001 and penetrates the side plate 33, and the other of which extends along the height direction of the vehicle-mounted device 100, and the other communication hole is used for communication between the third communication hole 322 and the housing water channel outlet 302.

[0204] In the figure, the other communication hole in the boss 37 for communication between the third communication hole 322 and the housing water channel outlet 302 is defined as a fourth communication hole 323. The fourth communication hole 323 is used to form a section of the internal water inlet passage. The fourth communication hole 323 can be machined downward from the top surface of the boss 37, and the housing water channel outlet 302 is machined from the side surface of the side plate 33 towards the boss 37.

[0205] In an embodiment, the integrated housing 30 includes two additional plugs. One of the two additional plugs is used to seal the opening of the third communication hole 322 formed in the side surface of the bottom plate 32, and the other of the two additional plugs is used to seal the opening of the fourth communication hole 323 formed in the top surface of the boss 37.

[0206] In this way, the internal water inlet passage is connected to the internal flow passage of the bottom plate 32 through the internal flow passage of the side plate 33, and the water-cooling radiator 60 is connected in series in the internal flow passage of the bottom plate 32. The internal flow passage of the bottom plate 32 is also connected to the housing water channel outlet 302 of the vehicle-mounted device 100 through the internal flow passage of the side plate 33. Because the internal flow passage of each section of the bottom plate 32 and the side plate 33 extends inwardly from the surface exposed outside the bottom plate 32 or the side plate 33, respectively, the internal flow passage of each section of the bottom plate 32 and the side plate 33 can be machined to reduce the machining cost of the integrated housing 30. In addition, the openings of the second communication hole 321, the third communication hole 322 and the housing water channel outlet 302 are formed in the side surface of the side plate 33 away from the electrical accommodation groove 31, which can avoid the risk of leakage of cooling water inside the electrical accommodation groove 31.

[0207] In some embodiments, some of the internal flow passages of each section of the bottom plate 32 and the side plate 33 can be integrally cast with the integrated housing 30, thereby improving the sealing of the internal flow passages in the integrated housing 30 and avoiding leakage of cooling water in the integrated housing 30.

[0208] Based on the above description of the various embodiments of the integrated housing 30, in one embodiment, the specific flow path of the cooling water in the integrated housing 30 is as follows: the cooling water flows into the first communication hole 335, then flows into the second communication hole 321, the first groove bottom water channel interface 311, and the inlet 61 in sequence. After the cooling water cools the motor controller 20 in the water-cooled radiator 60, the cooling water flows into the outlet 62, then flows into the second groove bottom water channel interface 312, the third communication hole 322, the fourth communication hole 323, and finally flows out of the housing water channel outlet 302. In this way, the water-cooled radiator 60 is connected in series in the internal flow channel of the bottom plate 32. The cooling water flowing from the internal flow channel of the side plate 33 can flow into the water-cooled radiator 60 through the first groove bottom water channel interface 311, then flow out of the water-cooled radiator 60 through the second groove bottom water channel interface 312, so as to realize continuous cooling of the motor controller 20 by the water-cooled radiator 60.

[0209] Please refer to Figure 35 the partial exploded structural schematic view of the vehicle-mounted device 100 provided by an embodiment of the present application, and Figure 36 the partial cross-sectional structural schematic view of the vehicle-mounted device 100 provided by an embodiment of the present application.

[0210] The motor controller 20 includes a plurality of second power modules 23, a bus capacitor module 22, and a second circuit board 21. The bus capacitor module 22, the plurality of second power modules 23, and the second circuit board 21 are arranged in sequence and spaced apart along the height direction of the vehicle-mounted device 100. The bus capacitor module 22, the plurality of second power modules 23, and the second circuit board 21 are electrically connected respectively. The plurality of second power modules 23 are used to convert direct current of the power battery 201 into alternating current to drive the drive motor 202.

[0211] The bus capacitor module 22 is located between the plurality of second power modules 23 and the bottom plate 32. The bus capacitor module 22 is used to accommodate a plurality of capacitors of the motor controller 20, and is arranged between the water-cooled radiator 60 and the bottom plate 32 along the height direction of the vehicle-mounted device 100. The bus capacitor module 22 is also arranged between the two vertical columns along the planar direction of the vehicle-mounted device 100. The second circuit board 21 is used to carry electrical components of the motor controller 20. The second circuit board 21 is arranged between the water-cooled radiator 60 and the liquid-cooled heat sink plate 50 along the height direction of the vehicle-mounted device 100. That is, the water-cooled radiator 60 and the plurality of second power modules 23 are arranged together between the bus capacitor module 22 and the second circuit board 21 along the height direction of the vehicle-mounted device 100.

[0212] The second power module 23 is one of the main heat sources of the motor controller 20. The water-cooled radiator 60 is mainly used for dissipating heat from the second power module 23. Specifically, the water-cooled radiator 60 includes two layers of heat dissipation plates. In the illustrated example, the two layers of heat dissipation plates are defined as a first heat dissipation plate 63 and a second heat dissipation plate 64. The first heat dissipation plate 63 and the second heat dissipation plate 64 are arranged in a spaced apart manner along the height direction of the vehicle-mounted device 100, and the gap between the first heat dissipation plate 63 and the second heat dissipation plate 64 is used to accommodate the plurality of second power modules 23 of the motor controller 20.

[0213] The first heat dissipation plate 63 and the second heat dissipation plate 64 each include an internal flow channel. The internal flow channels of the first heat dissipation plate 63 and the second heat dissipation plate 64 are connected in parallel between the inlet 61 and the outlet 62 of the water-cooled radiator 60. The water-cooled radiator 60 is able to dissipate heat from the second power module 23 from both sides through the two layers of heat dissipation plates, so as to improve the heat dissipation effect of the water-cooled radiator 60 on the second power module 23.

[0214] Along the height direction of the vehicle-mounted device 100, the side surface of the first heat dissipation plate 63 away from the second power module 23 faces the second circuit board 21 of the motor controller 20, and the side surface of the second heat dissipation plate 64 away from the second power module 23 faces the bus capacitor module 22. The first heat dissipation plate 63 and the second heat dissipation plate 64 also respectively form a heat dissipation effect on the second circuit board 21 and the bus capacitor module 22, further improving the overall heat dissipation effect of the water-cooled radiator 60 on the motor controller 20.

[0215] That is, along the height direction of the vehicle-mounted device 100, the water-cooled radiator 60 is arranged on the side of the second power module 23 away from the second circuit board 21. The water-cooled radiator 60 further includes the first heat dissipation plate 63, which is used to be embedded between the second power module 23 and the second circuit board 21 along the height direction of the vehicle-mounted device 100. The first heat dissipation plate 63 is used to dissipate heat from the second power module 23 and the second circuit board 21 respectively, so as to improve the heat dissipation effect of the water-cooled radiator 60 on the motor controller 20.

[0216] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations. The above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A water-cooled heat-dissipating vehicle-mounted device, characterized by comprising: The housing of the vehicle-mounted device comprises an integrated housing and an electrical cover plate, the integrated housing comprises an electrical accommodation groove, the electrical cover plate is used to enclose the electrical accommodation groove, the electrical accommodation groove is used to accommodate electrical components of at least one of a vehicle-mounted charger or a motor controller, wherein: The integrated housing comprises a housing waterway inlet, the electrical cover plate comprises a cover plate waterway inlet, a cover plate internal flow channel and a cover plate waterway outlet, the cover plate internal flow channel is used to receive cooling water through the cover plate waterway inlet, and the cover plate internal flow channel is used to deliver the cooling water to the housing waterway inlet through the cover plate waterway outlet; The housing waterway inlet is distributed on the outside of the electrical accommodation groove, the cover plate waterway inlet and the cover plate waterway outlet are distributed on the side of the electrical cover plate facing the electrical accommodation groove, the direction of the cover plate waterway inlet is opposite to the direction of the slot opening of the electrical accommodation groove, and the direction of the housing waterway inlet is the same as the direction of the slot opening of the electrical accommodation groove.

2. The in-vehicle device according to claim 1, characterized by The electrical accommodation groove is also used to accommodate a first circuit board, the side of the electrical cover plate facing the electrical accommodation groove is used to fix the first circuit board, the side of the first circuit board facing the electrical cover plate is used to fix a capacitor component and an inductor component in the electrical components of the vehicle-mounted charger, and the side of the electrical cover plate facing the first circuit board comprises a plurality of shielding protrusions, which are respectively embedded in the gaps of other electrical components of the vehicle-mounted charger.

3. The in-vehicle device according to claim 2, characterized by The electrical accommodation groove is also used to accommodate a liquid cooling heat dissipation plate, the cover plate internal flow channel is used to communicate with an internal flow channel of the liquid cooling heat dissipation plate, the first circuit board is arranged between the liquid cooling heat dissipation plate and the electrical cover plate, and the side of the first circuit board facing the liquid cooling heat dissipation plate is used to fix a plurality of power modules and the liquid cooling heat dissipation plate in the electrical components of the vehicle-mounted charger.

4. The in-vehicle device according to claim 3, characterized by The electrical accommodation groove is also used to accommodate a water-cooled heat sink and a second circuit board, the water-cooled heat sink is used to receive cooling water input by the housing waterway inlet, and the second circuit board is used to control a three-phase inverter circuit in the electrical components of the motor controller, the three-phase inverter circuit comprising a bus capacitor module and a plurality of power modules, wherein: The first circuit board, the liquid cooling heat dissipation plate, the second circuit board, the water-cooled heat sink and the bus capacitor module in the electrical accommodation groove are sequentially stacked between the electrical cover plate and the bottom of the electrical accommodation groove, the bus capacitor module is used to fix the second circuit board and the water-cooled heat sink, and the plurality of power modules are arranged between the second circuit board and the water-cooled heat sink.

5. The in-vehicle device according to claim 4, characterized by The electrical cover plate comprises a cooling groove and a cooling cover plate, the cooling groove is distributed on the side of the electrical cover plate away from the electrical accommodation groove, the cooling cover plate is used to enclose the cooling groove to form the cover plate internal flow channel, the bottom of the cooling groove comprises a first through hole and a second through hole, the first through hole and the second through hole respectively penetrate the bottom of the cooling groove, the first through hole is used to communicate with the inlet of the liquid cooling heat dissipation plate, and the second through hole is used to communicate with the outlet of the liquid cooling heat dissipation plate.

6. The in-vehicle device according to claim 5, characterized by The side of the liquid cooling heat dissipation plate facing the electrical cover plate is used to fix a heat dissipation plate water nozzle, the heat dissipation plate water nozzle comprises a first communication water channel and a second communication water channel, the first communication water channel is used to communicate the inlet of the liquid cooling heat dissipation plate and the first through hole, and the second communication water channel is used to communicate the outlet of the liquid cooling heat dissipation plate and the second through hole.

7. The in-vehicle device according to claim 6, characterized by The two ends of the heat dissipation plate water nozzle are distributed along the direction of the electrical cover plate and the liquid cooling heat dissipation plate, and the two ends of the heat dissipation plate water nozzle respectively comprise two grooves, wherein: The inlet of the first communication water channel and the outlet of the second communication water channel are distributed on the groove bottom of one of the two grooves, the one groove is used to cover the first through hole and the second through hole, the inlet of the first communication water channel is used to butt joint the first through hole, and the outlet of the second communication water channel is used to butt joint the second through hole; The outlet of the first communication water channel and the inlet of the second communication water channel are distributed on the groove bottom of the other of the two grooves, the other groove is used to cover the inlet of the liquid cooling heat dissipation plate and the outlet of the liquid cooling heat dissipation plate, the outlet of the first communication water channel is used to butt joint the inlet of the liquid cooling heat dissipation plate, and the inlet of the second communication water channel is used to butt joint the outlet of the liquid cooling heat dissipation plate.

8. The in-vehicle device according to claim 5, characterized by The groove bottom of the cooling tank further comprises a third through hole, a fourth through hole and a first separation protrusion, the third through hole is used to communicate the cover plate water channel inlet, the fourth through hole is used to communicate the cover plate water channel outlet, and the first separation protrusion is used to separate the third through hole and the fourth through hole to form a U-shaped flow channel.

9. The in-vehicle device according to claim 8, characterized by The groove bottom of the cooling tank further comprises a second separation protrusion, the second separation protrusion is used to separate the first through hole and the second through hole, the third through hole and the first through hole are arranged between the first separation protrusion and the second separation protrusion, the first through hole and the third through hole are arranged on one side of the second separation protrusion, and the second through hole is arranged on the other side of the second separation protrusion.

10. The in-vehicle device according to claim 9, characterized by The groove bottom of the cooling tank further comprises a plurality of heat dissipation teeth and a plurality of flow guide teeth, wherein: The plurality of heat dissipation teeth are distributed on both sides of the first separation protrusion, the plurality of flow guide teeth are distributed on both sides of the first separation protrusion, and at least one of the number, shape or arrangement of the flow guide teeth or the heat dissipation teeth on both sides of the first separation protrusion is different.

11. The in-vehicle device according to claim 4, characterized by The groove bottom of the electrical containing groove further comprises a first groove bottom water channel interface and a second groove bottom water channel interface, the inlet of the water-cooled heat sink is used to receive the cooling water input by the shell water channel inlet through the first groove bottom water channel interface, and the second groove bottom water channel interface is used to receive the cooling water output by the outlet of the water-cooled heat sink, wherein: The direction of the first groove bottom water channel interface and the direction of the second groove bottom water channel interface are the same as the direction of the groove opening of the electrical containing groove, the direction of the inlet of the water-cooled heat sink and the direction of the outlet of the water-cooled heat sink are opposite to the direction of the groove opening of the electrical containing groove, the inlet of the water-cooled heat sink is used to be embedded in the first groove bottom water channel interface, and the outlet of the water-cooled heat sink is used to be embedded in the second groove bottom water channel interface.

12. The in-vehicle device according to claim 11, characterized by The integrated housing further comprises an internal water inlet channel for connecting the housing water inlet and the first tank bottom water channel interface, an internal water outlet channel for connecting the second tank bottom water channel interface and the housing water outlet, and a housing water channel outlet, wherein: The housing water inlet and the housing water outlet are distributed on the same side of the electrical accommodation tank, and the housing water outlet has a different orientation than the housing water inlet.

13. The in-vehicle device according to claim 12, characterized by The electrical cover plate is used to fix a water channel connecting assembly, the water channel connecting assembly comprises two ends, one end of the two ends of the water channel connecting assembly is used to enclose the cover plate water inlet, the other end of the two ends of the water channel connecting assembly is used to receive the cooling water delivered by the water cooling system of the electric vehicle through the water pipe, and the housing water outlet of the integrated housing is used to deliver the cooling water to the water cooling system of the electric vehicle through the water pipe.

14. The in-vehicle device according to claim 13, characterized by The vehicle-mounted device further comprises a driving motor and a speed reducer, the housing of the vehicle-mounted device further comprises a motor end cover and a speed reducer end cover, the integrated housing further comprises a motor accommodation tank and a speed reducer accommodation tank, the motor accommodation tank is used to fix and accommodate the stator of the driving motor, the motor end cover is used to enclose the motor accommodation tank, the speed reducer accommodation tank is used to accommodate the gear set of the speed reducer, and the speed reducer end cover is used to enclose the speed reducer accommodation tank, wherein: The motor accommodation tank and the speed reducer accommodation tank are arranged adjacent to each other along the axial direction of the driving motor, the opening direction of the motor accommodation tank is opposite to the opening direction of the speed reducer accommodation tank, and the opening direction of the electrical accommodation tank is perpendicular to the opening direction of the motor accommodation tank and the opening direction of the speed reducer accommodation tank. The slot wall of the electrical accommodation tank comprises a first segment slot wall, a second segment slot wall, a third segment slot wall and a fourth segment slot wall, the first segment slot wall and the second segment slot wall are arranged opposite to each other along the axial direction of the driving motor, the third segment slot wall and the fourth segment slot wall are arranged opposite to each other along the direction perpendicular to the axial direction of the driving motor, the distance between the first segment slot wall and the opening of the motor accommodation tank is greater than the distance between the second segment slot wall and the opening of the motor accommodation tank, the distance between the third segment slot wall and the motor shaft of the driving motor is smaller than the distance between the fourth segment slot wall and the motor shaft of the driving motor, the power battery interface of the vehicle-mounted device is distributed on the first segment slot wall, the load power supply interface of the vehicle-mounted device is distributed on the second segment slot wall, the control signal interface of the vehicle-mounted device is distributed on the third segment slot wall, and the housing water outlet and the housing water inlet are distributed on the outside of the fourth segment slot wall.

15. An electric vehicle characterized by comprising: The electric vehicle comprises a power battery and a vehicle-mounted device as claimed in any one of claims 1-14, and the vehicle-mounted device is used to charge the power battery or to drive the wheels of the electric vehicle by using the power supply of the power battery.

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