All-in-one vehicle-mounted power supply device and power assembly

Abstract

The invention provides an all-in-one vehicle-mounted power supply device and a power assembly. The vehicle-mounted power supply device comprises a motor controller, a vehicle-mounted charger and a direct current conversion circuit. A shell of the vehicle-mounted power supply device is used for accommodating a first circuit board and a second circuit board. Electrical components of the vehicle-mounted power supply device are respectively fixed on at least one of the first circuit board and the second circuit board. The electrical assembly fixed on the first circuit board comprises a first interface and a second interface, and the electrical assembly fixed on the second circuit board comprises a third interface. The vehicle-mounted charger is used for receiving power supplied by an external power supply through the first interface and charging the power battery through the second interface. The motor controller is used for receiving power supplied by the power battery through the second interface and driving the driving motor. And the DC conversion circuit is used for supplying power to a vehicle-mounted load of the electric vehicle through the third interface. According to the all-in-one vehicle-mounted power supply device, the electrical assemblies are reasonably arranged through the two circuit boards, the integration degree is improved, and the overall size is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an all-in-one vehicle-mounted power supply device and a power assembly. Background Art

[0002] The on-board power supply device is used to receive high-voltage charging current to charge the power battery, and is also used to receive high-voltage charging current or power battery current to power other electrical devices on the vehicle. As the functions of electric vehicles continue to improve, the integration of on-board power supply devices is gradually increasing, resulting in a rapid increase in volume, affecting the layout of the interior space. Summary of the invention

[0003] The present application provides an all-in-one on-vehicle power supply device and a power assembly, by which electrical components are reasonably arranged by fixing two circuit boards of the on-vehicle power supply device, thereby improving the integration of the on-vehicle power supply device and reducing its size.

[0004] In the first aspect, the present application provides an all-in-one on-board power supply device. The on-board power supply device is applied to electric vehicles. The on-board power supply device includes a motor controller, an on-board charger and a DC conversion circuit. The housing of the on-board power supply device includes a receiving groove, which is used to accommodate a first circuit board and a second circuit board. The electrical components of the motor controller, the electrical components of the on-board charger and the electrical components of the DC conversion circuit are respectively fixed to at least one of the first circuit board and the second circuit board. The electrical components fixed to the first circuit board include a first interface and a second interface, and the electrical components fixed to the second circuit board include a third interface. The on-board charger is used to receive alternating current provided by an external power source through the first interface and to output direct current through the second interface to charge the power battery. The motor controller is used to receive direct current output by the power battery of the electric vehicle through the second interface and to output alternating current to drive the drive motor of the electric vehicle. The DC conversion circuit is used to power the on-board load of the electric vehicle through the third interface.

[0005] The multi-in-one vehicle-mounted power supply device provided by the present application accommodates the first circuit board and the second circuit board through the accommodating groove, and fixes the electrical components of the motor controller, the electrical components of the vehicle charger and the electrical components of the DC conversion circuit through the first circuit board and the second circuit board. The multi-in-one vehicle-mounted power supply device provided by the present application is also electrically connected to the external power supply, the power battery and the vehicle-mounted load through the first interface, the second interface and the third interface respectively, so that the vehicle-mounted power supply device of the present application integrates the functions of driving the drive motor, receiving power from the external power supply to charge the power battery, and receiving power from the power battery to power the vehicle-mounted load.

[0006] The electrical components fixed to the first circuit board include a first interface and a second interface, and the first circuit board is used to fix the electrical components of the vehicle charger. The electrical components fixed to the second circuit board include a third interface, and the second circuit board is used to fix the electrical components of the DC conversion circuit and the electrical components of the motor controller. The all-in-one vehicle power supply device provided by the present application reasonably arranges the electrical components through two circuit boards, thereby improving the integration and reducing the overall volume.

[0007] In one implementation, the area of ​​the second circuit board is smaller than half of the area of ​​the first circuit board, and the second circuit board is arranged between the bottom of the shell and the first circuit board.

[0008] In this implementation, by comparing the areas of the first circuit board and the second circuit board, the first circuit board can integrate more electrical components, and the area of ​​the second circuit board can be reduced to save the internal space of the receiving groove. By arranging the second circuit board between the shell bottom of the shell and the first circuit board, space can be reserved between the first circuit board and the shell bottom of the shell, so as to accommodate some electrical components with larger volume.

[0009] In one implementation, a DC conversion circuit includes a primary circuit, a first transformer and a secondary circuit, the electrical components fixed to the first circuit board also include electrical components of the primary circuit, the electrical components fixed to the second circuit board also include electrical components of the secondary circuit, and the first transformer is used to electrically connect the electrical components of the primary circuit carried by the first circuit board and the electrical components of the secondary circuit carried by the second circuit board.

[0010] In this implementation, the primary circuit of the DC conversion circuit is electrically connected to the secondary circuit through the first transformer. The electrical components of the primary circuit and the electrical components of the secondary circuit are conveniently fixed to the first circuit board and the second circuit board, respectively, and are electrically connected through the first transformer. The first transformer is relatively large in size, and the first transformer and the second circuit board are arranged together between the first circuit board and the bottom of the shell. The multi-in-one vehicle power supply device provided by the present application has a more compact structure, which is conducive to the heat dissipation of the first transformer.

[0011] In one implementation, the height of the first transformer is smaller than the distance between the first circuit board and the bottom of the accommodating groove and larger than the distance between the second circuit board and the bottom of the accommodating groove, and the second circuit board and the first transformer are arranged at intervals along the first direction.

[0012] In this implementation, by arranging the second circuit board and the first transformer side by side along the first direction, the connection distance between the second circuit board and the first transformer can be shortened.

[0013] In one implementation, the first transformer is connected to the first circuit board by plugging, and the first transformer is connected to the second circuit board by screw connection.

[0014] In this implementation, the plug-in connection between the first transformer and the first circuit board is easy to install, and the screw connection between the first transformer and the second circuit board is relatively firm, so that the first transformer can be fixedly connected to the first circuit board together with the second circuit board after being connected to the second circuit board.

[0015] In one implementation, the electrical components fixed to the first circuit board also include electrical components of a vehicle charger, and the vehicle charger includes an AC-DC conversion circuit. The input end of the AC-DC conversion circuit is used to receive AC power provided by an external power source, and the output end of the AC-DC conversion circuit is used to output DC power to the primary circuit of the DC conversion circuit through the on-board circuit of the first circuit board. Along the first direction, the electrical components of the vehicle charger are arranged between the first interface and the electrical components of the primary circuit of the DC conversion circuit.

[0016] In this implementation, the electrical components of the on-board charger are fixed to the first circuit board. The output end of the AC-DC conversion circuit is used to output DC power through the primary circuit. The electrical components of the on-board charger and the primary circuit are arranged along the first direction, and the two are relatively close and located on the same side of the first circuit board, which facilitates the electrical connection between the electrical components of the on-board charger and the primary circuit, and makes the heat of the first circuit board concentrated, which is convenient for arranging the heat dissipation structure.

[0017] In one implementation, the receiving slot includes a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole, the first mounting hole and the second mounting hole are distributed on the first side wall of the receiving slot, the third mounting hole and the fourth mounting hole are distributed on the second side wall of the receiving slot, and the first circuit board and the second circuit board are stacked and arranged between the first side wall and the second side wall. The first mounting hole is used to install a first connector, and the first connector is used to electrically connect the first interface and the external power supply. The second mounting hole is used to install a second connector, and the second connector is used to electrically connect the second interface and the power battery. The third mounting hole is used to install a third connector, and the third connector is used to electrically connect the third interface and the vehicle-mounted load. The three-phase copper busbar of the vehicle-mounted power supply device is connected to the motor through the fourth mounting hole, and the vehicle-mounted power supply device supplies power to the motor through the three-phase copper busbar. The interval between the first mounting hole and the second mounting hole in the first side wall is greater than the interval between the third mounting hole and the fourth mounting hole in the second side wall.

[0018] In this implementation, each mounting hole is used to install a connector so that each interface of the electrical component is connected to the outside through the connector. The first mounting hole and the second mounting hole are located on the same side of the first circuit board and close to the vehicle charger along the first direction, so that the first interface and the second interface are electrically connected to the outside through the first connector and the second connector respectively. The third mounting hole and the fourth mounting hole are located on the other side of the first circuit board and close to the DC conversion circuit along the first direction, so that the third interface is connected to the vehicle load through the third connector.

[0019] The first interface and the second interface are used to transmit high-voltage AC and high-voltage DC respectively. The larger distance between the first mounting hole and the second mounting hole can reduce the interference between the high voltages. The fourth mounting hole is close to the drive motor, and the distance between the third mounting hole and the fourth mounting hole is smaller, which makes it easier for the third connector to provide low-voltage DC to components such as the rotary transformer of the drive motor.

[0020] In one implementation, the receiving tank includes a coolant inlet and a coolant outlet, the coolant inlet is distributed on the third side wall of the receiving tank, the coolant outlet is distributed on the fourth side wall of the receiving tank, the first circuit board and the second circuit board are stacked and arranged between the third side wall and the fourth side wall, the distance between the coolant inlet and the second mounting hole along the second direction is smaller than the distance between the coolant outlet and the second mounting hole, and the second direction is perpendicular to the first direction.

[0021] In this implementation, the multi-in-one vehicle-mounted power supply device provided by the present application also dissipates heat through a coolant, and a coolant inlet and a coolant outlet are formed on the shell for the coolant to circulate in the receiving tank. The coolant inlet and the coolant outlet are located on two side walls of the shell that are opposite to each other along the second direction, so as to avoid multiple mounting holes and connectors on the first side wall and the second side wall, thereby ensuring the safety of the vehicle-mounted power supply device.

[0022] The coolant inlet is closer to the second mounting hole than the coolant outlet, so the coolant inlet is closer to the motor controller and the cooling effect of the motor controller is preferentially ensured.

[0023] In one implementation, the coolant inlet is used to connect to the coolant outlet through the first heat sink and the second heat sink in sequence. The first heat sink and the second heat sink are arranged between the housing and the cover plate, the orthographic projection of the first heat sink on the first circuit board at least partially overlaps with the drive motor controller of the vehicle power supply device, and the orthographic projection of the second heat sink on the first circuit board at least partially overlaps with the vehicle charger.

[0024] In this implementation, the vehicle-mounted power supply device provided by the present application includes a first heat sink and a second heat sink. The first heat sink is used to dissipate heat for the motor controller, and the second heat sink is used to dissipate heat for the vehicle-mounted charger. The water inlet near the motor controller is connected to the water outlet through the first heat sink and the second heat sink in turn. This can ensure reliable heat dissipation of the motor controller and simultaneously achieve heat dissipation function for the vehicle-mounted charger.

[0025] In one implementation, the electrical components fixed to the first circuit board also include electrical components of the motor controller, and the electrical components of the motor controller include a power module, which is fixed to the side of the first circuit board facing the bottom of the receiving groove. The input end of the power module is used to receive direct current provided by the power battery through the second interface, and the output end of the power module is used to output alternating current to the motor.

[0026] In this implementation, the electrical components of the motor controller are fixed to the first circuit board, so that the motor controller can receive power from the power battery through the second interface. The power module of the motor controller is fixed to the side of the first circuit board facing the bottom of the shell, so that the power module is electrically connected to the drive motor and the structure of the all-in-one vehicle power supply device provided by the present application is more compact.

[0027] In one implementation, the power module is arranged between the second interface and the fourth mounting hole along the first direction.

[0028] In one implementation, the on-board power supply device includes a three-phase copper busbar adapter, the output end of the power module is connected to the three-phase copper busbar via the three-phase copper busbar adapter, the AC current output from the output end of the power module to the motor passes through the three-phase copper busbar adapter and the three-phase copper busbar, the three-phase copper busbar adapter is fixed between the power module and the bottom of the accommodating groove, one end of the three-phase copper busbar adapter is fixedly connected to the output end of the power module, and the other end of the three-phase copper busbar adapter is connected to the three-phase copper busbar via three screws, and along the stacking direction of the bottom of the accommodating groove and the first circuit board, the projections of the three screws fall into the corresponding three through holes on the first circuit board.

[0029] In this implementation, the motor controller is electrically connected to the drive motor via a three-phase copper busbar, the three-phase copper busbar is located on the side of the first circuit board facing the bottom of the shell, and the three-phase copper busbar adapter is used to electrically connect the three-phase copper busbar and the power module on the same side, making the structure of the vehicle power supply device more compact. The three through holes on the first circuit board are used to avoid the three screws connecting the three-phase copper busbar adapter and the three-phase copper busbar, thereby facilitating the installation and disassembly maintenance between the three-phase copper busbar adapter and the three-phase copper busbar.

[0030] In one implementation, a vehicle-mounted power supply device includes a capacitor module, a capacitor module is used to reduce the electromagnetic radiation of the direct current input from the power battery to the motor controller, a capacitor module includes a magnetic ring and a capacitor, a capacitor module is adjacent to a three-phase copper busbar adapter and is fixed between a first circuit board and a bottom of a receiving groove, and a projection of a capacitor module on the first circuit board at least partially overlaps with the electrical components of the motor controller.

[0031] In this implementation, the side of the three-phase copper busbar adapter is used to fix a capacitor module, and the capacitor module and the electrical components of the motor controller are at least partially arranged to overlap, which can shorten the transmission distance between the capacitor module and the motor controller and make the structure of the vehicle power supply device more compact.

[0032] In one implementation, the vehicle-mounted power supply device further includes a shielding plate, which is used to shield electromagnetic interference between any two of the electrical components of the motor controller, the electrical components of the vehicle-mounted charger, and the electrical components of the DC conversion circuit, and the shielding plate is fixed between the bottom of the receiving groove and the first circuit board. The first shielding wall of the shielding plate abuts against the metal part on the first circuit board facing the bottom of the receiving groove, the electrical components of the motor controller are fixed on one side of the first shielding wall, and the electrical components of the vehicle-mounted charger and the electrical components of the DC conversion circuit are fixed on the other side of the first shielding wall. The second shielding wall of the shielding plate is arranged between the first interface and the third interface, the electrical components of the vehicle-mounted charger are fixed on one side of the second shielding wall, and the first transformer of the DC conversion circuit and the electrical components of the secondary circuit are fixed on the other side of the second shielding wall.

[0033] In this implementation, the on-board power supply device realizes electromagnetic shielding between electrical components through a shielding plate. The first shielding wall extends roughly along the first direction and is used to shield electromagnetic interference between the motor controller and the on-board charger and the DC conversion circuit. The second shielding wall extends roughly along the second direction, and the second shielding wall is located on the side of the first shielding wall facing the on-board charger and the DC conversion circuit, and the second shielding wall is used to shield electromagnetic interference between the on-board charger and the DC conversion circuit.

[0034] The metal piece of the first circuit board facing the bottom of the shell is used to abut against the shielding plate to prevent the electromagnetic signal from leaking from the gap between the first circuit board and the shielding plate, thereby affecting the shielding effect.

[0035] In one implementation, the vehicle-mounted power supply device includes a compressor controller or a second DC conversion circuit, the second DC conversion circuit is used to output DC power supply, the electrical components fixed to the first circuit board also include electrical components of the compressor controller or the electrical components of the second DC conversion circuit and a fifth interface, the accommodating groove also includes a fifth mounting hole, the fifth mounting hole is distributed on the side wall of the accommodating groove, the fifth mounting hole is used to install a fifth connector, the fifth connector is used to electrically connect the air-conditioning compressor or the vehicle heater to the fifth interface, and the fifth interface is fixed between the first interface and the second interface.

[0036] In this implementation, the first circuit board is also used to fix the electrical components of the compressor controller or the electrical components of the second DC conversion circuit. The all-in-one vehicle power supply device of the present application is also used to connect the cabin heater or the air-conditioning compressor through the fifth interface, further improving the integration of the vehicle power supply device.

[0037] In one implementation, the fifth mounting hole is distributed on the first side wall of the accommodating groove, and the interval between the first mounting hole and the fifth mounting hole in the first side wall is smaller than the interval between the second mounting hole and the fifth mounting hole.

[0038] In one implementation, the housing of the vehicle-mounted power supply device further includes a cover plate and an end cover, the cover plate is used to enclose the receiving groove, the cover plate includes a hollow area, and the end cover is used to enclose the hollow area. The receiving groove is also used to accommodate at least one fuse tube, the at least one fuse tube is used to electrically connect the second interface with at least one of the electrical components of the motor controller, the electrical components of the compressor controller, or the electrical components of the second DC conversion circuit, and the at least one fuse tube is used to open-circuit protect at least one of the electrical components of the motor controller, the electrical components of the compressor controller, or the electrical components of the second DC conversion circuit. The cover plate is stacked with the first circuit board, and the projection area of ​​the hollow area along the direction in which the cover plate and the first circuit board are stacked covers at least one fuse tube.

[0039] In this implementation, the first circuit board is close to the cover plate. By providing a removable end cover on the cover plate to expose the fuse, each fuse can be maintained and replaced without removing the entire cover plate, thereby improving the maintenance convenience of the vehicle power supply device provided by this application.

[0040] In one implementation, the vehicle-mounted power supply device includes a vehicle controller. The electrical components fixed to the first circuit board also include electrical components of the vehicle controller and a sixth interface, the electrical components of the motor controller are fixed between the sixth interface and the second interface, and the vehicle controller is used to transmit control signals through the sixth interface to control the vehicle-mounted device. The receiving slot also includes a sixth mounting hole, which is distributed at the bottom of the receiving slot, and the sixth mounting hole is used to install a sixth connector, which is used to electrically connect the sixth interface to the vehicle-mounted device.

[0041] In this implementation, the first circuit board is also used to fix the electrical components of the vehicle controller and the sixth interface. The all-in-one vehicle power supply device of the present application is also used to output control signals through the sixth interface to control the on-board equipment of the electric vehicle, further improving the integration of the vehicle power supply device.

[0042] In one implementation, the on-board equipment of the electric vehicle includes one or more of an accelerator pedal, a brake pedal, a lighting lamp, a steering gear, and an air conditioner.

[0043] In one implementation, the vehicle-mounted power supply device includes a filter, the first circuit board is used to fix the electrical components of the filter, and the filter is used to achieve electromagnetic shielding between other electrical components in the vehicle-mounted power supply device.

[0044] In one implementation, the electrical components of the filter include a plurality of magnetic devices.

[0045] In one implementation, the primary circuit and the vehicle controller are arranged at intervals along the second direction.

[0046] In this embodiment, the distance between the vehicle controller and the on-board charger on the first circuit board is relatively far, which can reduce the influence of electromagnetic interference generated by the on-board charger when it is working on the vehicle controller.

[0047] In one implementation, the shell bottom of the shell includes a mechanical limit interface, and the shell is used to be fixedly connected to the shell of the drive motor through the mechanical limit interface.

[0048] In this implementation, the vehicle-mounted power supply device provided in the present application can be fixed to the housing of the drive motor, so as to facilitate the three-phase copper busbar of the motor controller in the vehicle-mounted power supply device to electrically connect the drive motor to improve the overall integration of the powertrain.

[0049] In one implementation, the side wall of the shell is used to extend downward from the shell bottom and form an accommodating cavity for accommodating the drive motor.

[0050] In one implementation, the shielding plate includes a third shielding wall, the electrical components of the vehicle charger include a plurality of common-mode inductors, the plurality of common-mode inductors are arranged at intervals along a second direction, and the third shielding wall extends approximately along the first direction and is arranged between two adjacent common-mode inductors along the second direction.

[0051] In one implementation, the vehicle-mounted power supply device includes at least one shielding cover, and the at least one shielding cover is used to be fixed to the first circuit board to isolate electromagnetic interference. Among them, one shielding cover is used to cover the vehicle controller, the sixth interface and the plurality of pins or pins electrically connected to the sixth connector.

[0052] In this implementation, the electromagnetic interference generated by the vehicle controller on the first circuit board, the multiple pins or pins electrically connected to the sixth interface and the sixth connecting piece is relatively large. By isolating the vehicle controller on the first circuit board, the multiple pins or pins electrically connected to the sixth interface and the sixth connecting piece through a shielding cover, the electromagnetic interference of the vehicle controller in the vehicle power supply device to the other functional circuits can be reduced, thereby ensuring the reliable operation of the vehicle controller.

[0053] In one implementation, a shielding cover is used to cover the vehicle charger, a plurality of pins or plugs electrically connected to the first interface and the first connector.

[0054] In this implementation, the electromagnetic interference generated by the vehicle charger, the multiple pins or pins electrically connected to the first interface and the first connector is relatively large. By isolating the vehicle charger on the first circuit board, the multiple pins or pins electrically connected to the first interface and the first connector through a shielding cover, the electromagnetic interference of the vehicle charger on the remaining electrical components in the vehicle power supply device can be reduced, thereby ensuring that the vehicle charger works reliably and that the vehicle power supply device of this application complies with safety regulations.

[0055] In the second aspect, the present application provides a powertrain, which includes a drive motor and the above-mentioned on-board power supply device, the receiving slot of the on-board power supply device and the drive motor housing are an integrated housing, the bottom of the receiving slot shares a portion of the housing with the drive motor housing, the drive motor is connected to the on-board power supply device through the three-phase copper busbar of the on-board power supply device, and the on-board power supply device outputs a three-phase current to drive the drive motor to rotate. The powertrain provided by the present application accommodates the on-board power supply device and the drive motor respectively through an integrated housing, so that the structure of the powertrain is more compact, and it is convenient for the all-in-one on-board power supply device provided by the present application to be electrically connected to the drive motor through the three-phase copper busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 This is a schematic diagram of the structure of an on-board power supply device in an electric vehicle provided in one embodiment of the present application;

[0058] Figure 2 This is a schematic diagram of an application scenario of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0059] Figure 3 A structural block diagram of some electrical components in a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0060] Figure 4 This is a structural schematic diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0061] Figure 5 This is a schematic diagram of the exploded structure of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0062] Figure 6 A schematic diagram of the exploded structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application from one viewing angle;

[0063] Figure 7 A schematic diagram of the exploded structure of the vehicle-mounted power supply device 10 provided in one embodiment of the present application from another perspective;

[0064] Figure 8 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0065] Fig. 9A partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0066] Fig.10 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0067] Fig.11 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0068] Fig.12 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0069] Fig.13 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0070] Fig.14 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0071] Fig.15 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0072] Fig.16 A partial schematic diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0073] Fig.17 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0074] Fig.18 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0075] Fig.19 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0076] Fig. 20 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0077] Fig.21 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0078] Fig. 22 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0079] Fig.23A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0080] Fig.24 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0081] Fig.25 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0082] Fig.26 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0083] Fig. 27 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0084] Fig.28 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0085] Fig.29 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0086] Fig.30 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0087] Fig.31 A schematic diagram of a partial structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0088] Fig.32 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0089] Fig.33 A schematic diagram of a partial exploded structure of a vehicle-mounted power supply device 10 provided in an embodiment of the present application;

[0090] Fig.34 A partial schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application;

[0091] Fig.35 It is a structural schematic diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0092] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0093] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

[0094] PCB: Printed Circuit Board, refers to a carrier for electrically connecting electronic components to each other. In the embodiment of the present application, it is implemented by a first circuit board and a second circuit board.

[0095] OBC: On-board Charger, a vehicle charger, is a power electronic device that converts AC power into DC power to charge the power battery of electric vehicles.

[0096] DCDC: Direct Current to Direct Current, a DC conversion circuit, can convert a DC power supply of a certain voltage level into a DC power supply of another voltage level, and plays a role in regulating the power output and stabilizing the power supply voltage. For example, the high-voltage DC power output by the power battery of an electric vehicle can be converted into low-voltage DC power to power other electrical components in the electric vehicle.

[0097] PDU: Power Distribution Unit, which is mainly responsible for the distribution and management of the electrical energy output by the power battery of electric vehicles.

[0098] MCU: Motor Control Unit, motor controller, receives control instructions from the vehicle controller and then controls the speed and rotation direction of the drive motor.

[0099] VCU: Vehicle Control Unit, the core of the entire control system of an electric vehicle. Its main function is to coordinate and manage the operation status of the entire vehicle, including collecting the status of the drive motor and power battery, collecting accelerator pedal signals, brake pedal signals, actuator and sensor signals, and making corresponding judgments based on comprehensive analysis of the driver's intentions, and then monitoring the actions of the controllers of the lower components.

[0100] In this article, "high voltage" and "low voltage" refer to the relative size of voltage. The voltage of "high voltage" is relatively higher than that of "low voltage", and does not represent the specific voltage value.

[0101] The present application provides an all-in-one vehicle-mounted power supply device. The vehicle-mounted power supply device is applied to electric vehicles. The vehicle-mounted power supply device includes a motor controller, a vehicle-mounted charger and a DC conversion circuit. The housing of the vehicle-mounted power supply device includes a receiving groove, and the receiving groove is used to receive a first circuit board and a second circuit board. The electrical components of the motor controller, the electrical components of the vehicle-mounted charger and the electrical components of the DC conversion circuit are respectively fixed to at least one of the first circuit board and the second circuit board. The electrical components fixed to the first circuit board include a first interface and a second interface, and the electrical components fixed to the second circuit board include a third interface. The vehicle-mounted charger is used to receive AC power provided by an external power source through the first interface and to output DC power through the second interface to charge the power battery. The motor controller is used to receive DC power output by the power battery of the electric vehicle through the second interface and to output AC power to drive the driving motor of the electric vehicle. The DC conversion circuit is used to power the vehicle-mounted load of the electric vehicle through the third interface. The all-in-one vehicle-mounted power supply device provided in the present application integrates the functions of driving the driving motor, receiving power from an external power source to charge the power battery, and receiving power from the power battery to power the vehicle-mounted load. The electrical components are reasonably arranged by two circuit boards, which improves the integration and reduces the overall volume.

[0102] The present application provides a powertrain, which includes a drive motor and the above-mentioned on-board power supply device. The receiving slot of the on-board power supply device and the drive motor housing are an integrated housing, the bottom of the receiving slot and the drive motor housing share a portion of the housing, the drive motor is connected to the on-board power supply device through the three-phase copper busbar of the on-board power supply device, and the on-board power supply device outputs a three-phase current to drive the drive motor to rotate. The powertrain provided by the present application accommodates the on-board power supply device and the drive motor respectively through an integrated housing, so that the structure of the powertrain is more compact, and it is convenient for the all-in-one on-board power supply device provided by the present application to be electrically connected to the drive motor through the three-phase copper busbar.

[0103] See also Figure 1 A schematic diagram of the structure of an on-board power supply device in an electric vehicle provided in one embodiment of the present application is shown.

[0104] like Figure 1 As shown, the electric vehicle 1 includes the all-in-one on-board power supply device 10 provided by the present application, which is used to be fixed to the vehicle frame and to be electrically connected to various electrical components in the electric vehicle 1. The on-board power supply device 10 is used to supply energy to various electrical components in the electric vehicle 1.

[0105] Among them, the electric vehicle 1 refers to a wheeled electric vehicle 1 driven or towed by a power device for people traveling on the road or for transporting goods and performing special engineering operations. The electric vehicle 1 includes electric vehicles / electric vehicles (Electric Vehicle, referred to as EV), pure electric vehicles (Pure Electric Vehicle / Battery Electric Vehicle, referred to as PEV / BEV), hybrid electric vehicles (Hybrid Electric Vehicle, referred to as HEV), range extended electric vehicles (Range Extended Electric Vehicle, referred to as REEV), plug-in hybrid electric vehicles (Plug-in Hybrid Electric Vehicle, referred to as PHEV), new energy vehicles (New Energy Vehicle), etc. In some embodiments, the electric vehicle 1 includes passenger cars, various special operation vehicles with specific functions, such as engineering rescue vehicles, sprinkler trucks, sewage suction trucks, cement mixer trucks, crane trucks, medical vehicles, etc. The electric vehicle 1 can also be a robot that can travel.

[0106] For the sake of clarity, Figure 1 The enlarged diagram of the functional components of the electric vehicle 1 is mainly used to show the connection and subordinate relationship of the functional components, and does not indicate the specific position, size and relative distance of the functional components.

[0107] Please refer to Figure 2 A schematic diagram of an application scenario of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0108] like Figure 2 As shown, the electrical components of the electric vehicle 1 include a first type of load 13 and a second type of load 14. The on-board power supply device 10 provided in the present application is respectively used to be electrically connected to an external power supply, a first type of load 13 and a second type of load 14. The on-board power supply device 10 receives a high-voltage charging current through an external power supply. In one embodiment, the external power supply may be an AC power grid, an AC charging pile or an uninterruptible power supply (UPS). At this time, the external power supply is an AC power supply. The on-board power supply device 10 is used to be electrically connected to an external power supply and receive AC power. The on-board power supply device 10 converts the received AC power into DC power and transmits it to the first type of load 13 and the second type of load 14 to power the first type of load 13 and the second type of load 14. In another embodiment, the on-board power supply device 10 provided in the present application converts the voltage amplitude or frequency of the received AC power, and outputs another form of AC power to power other electrical components that need to work under AC power.

[0109] In one embodiment, the first type of load 13 is a high voltage load. Exemplarily, the first type of load 13 is a battery, a compressor or a heater. When the battery is used to power the electric motor in the power system of the electric vehicle 1, the battery may also be referred to as a power battery 15. The second type of load 14 is a low voltage load. Exemplarily, the second type of load 14 includes at least one of a low voltage battery, a lighting lamp, a wiper, an air conditioner, an audio system, a USB interface, an instrument panel and a control display screen. The low voltage battery may also power other loads in the second type of load 14.

[0110] In one embodiment, the electric vehicle 1 provided in the present application includes a power battery 15, which is used to be fixed to the vehicle frame and to be electrically connected to the on-board power supply device 10. The power battery 15 is used to receive charging current through some electrical components in the on-board power supply device 10, that is, the power battery 15 is used to receive and store electrical energy provided by the on-board power supply device 10. The power battery 15 is also used to supply power to another part of the electrical components in the on-board power supply device 10 or to supply power to some electrical components in the electric vehicle 1, such as the drive motor 11 in the power system, through some electrical components in the on-board power supply device 10.

[0111] Please cooperate Figure 3 The structure block diagram of some electrical components in the vehicle power supply device 10 provided in one embodiment of the present application is shown.

[0112] like Figure 3 As shown, the vehicle-mounted power supply device 10 provided in the present application includes a power conversion component, which is used to receive alternating current and output at least two direct currents with different voltages. Specifically, the power conversion component includes an on-board charger 110 and a DC conversion circuit 130. The on-board charger 110 is used to receive alternating current provided by an external power source and to output direct current to charge the power battery 15. The DC conversion circuit 130 is used to receive power from the on-board charger 110 or the power battery 15 and to supply power to the on-board load of the electric vehicle 1.

[0113] When the DC conversion circuit 130 is used to receive power from the on-board charger 110, the high-voltage charging current input by the external power supply to the power conversion component is AC power, which is converted into DC power by the on-board charger 110 and then transmitted to the DC conversion circuit 130. After receiving the DC power output by the on-board charger 110, the DC conversion circuit 130 converts the electric energy into a second DC power, and uses it to supply power to the second type of load 14. When the DC conversion circuit 130 is used to receive power from the power battery 15, the power battery 15 outputs a high-voltage DC current, and the DC conversion circuit 130 is used to convert the high-voltage DC current into a first DC power or a second DC power and output it to the on-board power supply device 10.

[0114] In one embodiment, the DC conversion circuit 130 includes a primary circuit 131, a first transformer 1000, and a secondary circuit 132. The primary circuit 131 is used to receive power from the vehicle charger 110 or the power battery 15. The first transformer 1000 is a low-voltage transformer, and the first transformer 1000 is used to receive the current output by the primary circuit 131 and reduce its voltage value. The secondary circuit 132 is used to receive the current output by the first transformer 1000 and output a second direct current, that is, a low-voltage direct current. The primary circuit 131 is used to convert the direct current into a positive and negative alternating square wave, and the voltage of the square wave is reduced after passing through the first transformer 1000, and finally the secondary circuit 132 converts the transformed square wave into a second direct current output. Exemplarily, the voltage of the direct current is 100V, the positive and negative alternating square wave voltage is +100V to -100V, the transformed square wave voltage is +12V to -12V, and the voltage of the second direct current is 12V. The present application sets a primary circuit 131, a first transformer 1000 and a secondary circuit 132 in the DC conversion circuit 130, so that the vehicle-mounted power supply device 10 provided in the present application can convert the DC power output by the vehicle-mounted charger 110 or the power battery 15 or the first DC power output by the DC conversion circuit 130 into a second DC power and supply power to the second type of load 14.

[0115] Please refer to Figure 4 The structural diagram of the vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, and Figure 5 The exploded structural diagram of the vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, and Figure 6 and Figure 7 Schematic diagrams of the exploded structure of a vehicle-mounted power supply device 10 provided in one embodiment of the present application at different viewing angles are respectively illustrated.

[0116] like Figure 4-Figure 7 As shown, the vehicle-mounted power supply device 10 provided in the present application includes a shell 600, a first circuit board 700, a second circuit board 900, and a cover plate 800. The shell 600 includes a shell bottom 610 and a plurality of side walls 620, and the plurality of side walls 620 surround the shell bottom 610 and form a receiving groove 810. That is, the shell 600 of the vehicle-mounted power supply device 10 includes a receiving groove 810. The receiving groove 810 is used to receive the first circuit board 700 and the second circuit board 900. The cover plate 800 is used to shield the notch of the receiving groove 810, and the cover plate 800 is used to enclose the first circuit board 700 and the second circuit board 900 with the shell 600.

[0117] The first circuit board 700 and the second circuit board 900 are used to fix the electrical components of the vehicle-mounted power supply device 10. The electrical components fixed by the first circuit board 700 include a first interface 701 and a second interface 702, and the electrical components fixed by the second circuit board 900 include a third interface 703. The vehicle-mounted power supply device 10 provided in the present application includes a motor controller 421, a vehicle-mounted charger 110 and a DC conversion circuit 130. The electrical components of the motor controller 421, the electrical components of the vehicle-mounted charger 110 and the electrical components of the DC conversion circuit 130 are respectively fixed to at least one of the first circuit board 700 and the second circuit board 900. The vehicle-mounted charger 110 is used to receive the AC power provided by the external power supply through the first interface 701 and to output the DC power through the second interface 702 to charge the power battery 15. The motor controller 421 is used to receive the DC power output by the power battery 15 of the electric vehicle 1 through the second interface 702 and to output the AC power to drive the driving motor 11 of the electric vehicle 1. The DC conversion circuit 130 is used to power the vehicle-mounted load of the electric vehicle 1 through the third interface 703.

[0118] The multi-in-one vehicle-mounted power supply device 10 provided in the present application accommodates the first circuit board 700 and the second circuit board 900 through the accommodating groove 810, and fixes the electrical components of the motor controller 421, the electrical components of the vehicle-mounted charger 110, and the electrical components of the DC conversion circuit 130 through the first circuit board 700 and the second circuit board 900. The multi-in-one vehicle-mounted power supply device 10 provided in the present application is also electrically connected to the external power supply, the power battery 15, and the vehicle-mounted load through the first interface 701, the second interface 702, and the third interface 703, respectively, so that the vehicle-mounted power supply device 10 of the present application integrates the functions of driving the drive motor 11, receiving power from the external power supply to charge the power battery 15, and receiving power from the power battery 15 to supply power to the vehicle-mounted load.

[0119] The electrical components fixed by the first circuit board 700 include a first interface 701 and a second interface 702, and the first circuit board 700 is used to fix the electrical components of the vehicle charger 110. The electrical components fixed by the second circuit board 900 include a third interface 703, and the second circuit board 900 is used to fix the electrical components of the DC conversion circuit 130 and the electrical components of the motor controller 421. The all-in-one vehicle power supply device 10 provided in the present application reasonably arranges the electrical components through two circuit boards, thereby improving the integration and reducing the overall volume.

[0120] Specifically, the on-board charger 110 includes an input terminal and an output terminal. The input terminal of the OBC is used to be electrically connected to an external power source to receive the AC power provided by the external power source. The output terminal of the OBC is used to be electrically connected to the power battery 15 through the DC conversion circuit 130 to provide DC power to the power battery 15. The DC conversion circuit 130 is used to receive the DC power provided by the on-board charger 110 or the power battery 15, and is used to supply power to other electrical loads in the electric vehicle 1 according to the required voltage.

[0121] In one embodiment, the vehicle-mounted power supply device 10 provided in the present application includes a vehicle controller 410. The vehicle controller 410 is used to be electrically connected or communicatively connected to some other electrical components of the electric vehicle 1. The vehicle controller 410 determines the driver's driving intention by collecting signals such as the accelerator pedal of the electric vehicle 1 and the brake pedal of the electric vehicle 1, and after making a corresponding judgment through comprehensive analysis, it sends control instructions to the controllers in the power system of the electric vehicle 1 and the power battery 15 system to control the operating state of the electric vehicle 1. The vehicle controller 410 is also used to receive power from the power battery 15 through the DC conversion circuit 130.

[0122] In one embodiment, the electric vehicle 1 includes a drive motor 11, which is used to drive and connect with one or more wheels 12 of the electric vehicle 1. The motor controller 421 of the vehicle-mounted power supply device 10 provided in the present application is used to be electrically connected to the power battery 15 through the DC conversion circuit 130, and is used to be electrically connected to the drive motor 11. The motor controller 421 is used to receive power from the power battery 15 through the DC conversion circuit 130, and receive control instructions from the vehicle controller 410 to drive the drive motor 11 to output torque to drive one or more wheels 12 of the electric vehicle 1 to rotate.

[0123] In one embodiment, the electric vehicle 1 includes an air conditioner, which is used to be fixed to the vehicle frame and is used to be electrically connected or communicatively connected to the on-board power supply device 10. The air conditioner is used to receive control instructions from the on-board power supply device 10 to adjust the temperature and humidity in the vehicle compartment. Exemplarily, the air conditioner includes a compressor, the on-board power supply device 10 includes a compressor controller, the compressor is used to be electrically connected to the compressor controller, and the on-board power supply device 10 is used to send control instructions to the compressor through the compressor controller. The compressor is used to receive control instructions from the compressor controller to compress and transport the refrigerant in the air conditioner.

[0124] In one embodiment, the electric vehicle 1 includes a heater, the on-board power supply device 10 includes a heater controller, the heater is electrically connected to the heater controller, and the on-board power supply device 10 sends a control instruction to the heater through the heater controller. The heater is used to receive the control instruction of the heater controller to provide heat for the electric vehicle 1. Exemplarily, the heater can be a seat heater, that is, the heater is used to provide heat to the seat of the electric vehicle 1 to improve the user experience of the driver and passengers. In another embodiment, the heater can also be an air-conditioning heater, which is used to provide heating for the vehicle compartment.

[0125] In one embodiment, the power conversion component, the vehicle controller, the motor controller, the compressor controller and the heater controller are used to form the electrical components in the vehicle power supply device 10 provided by the present application. In one embodiment, the vehicle power supply device 10 provided by the present application includes a second DC conversion circuit 140, which is used to receive power from the vehicle charger 110 and the power battery 15, and distribute it to other electrical components in the electric vehicle 1 as needed to optimize the energy distribution of the whole vehicle.

[0126] In one embodiment, the vehicle-mounted power supply device 10 provided in the present application includes a plurality of shielding plates 1100. The shielding plates 1100 are used to shield electromagnetic interference between any two of the electrical components of the motor controller 421, the electrical components of the vehicle-mounted charger 110, and the electrical components of the DC conversion circuit 130, and the shielding plates 1100 are fixed between the bottom of the receiving groove 810 and the first circuit board 700.

[0127] In one embodiment, the first circuit board 700 includes a plurality of magnetic components, and the first circuit board 700 is used to connect to the second circuit board 900. The second circuit board 900 includes one or more capacitors 910, and the second circuit board 900 is used to connect to the first transformer 1000. Specifically, the shielding plate 1100 is used to form a plurality of isolation cavities 1110, and the plurality of isolation cavities 1110 are used to accommodate the plurality of magnetic components of the first circuit board 700. For details, please refer to Figure 8 A partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, Fig. 9 A partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, and Fig.10 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0128] In one embodiment, the area of ​​the second circuit board 900 is less than half of the first circuit board 700, and the second circuit board 900 is arranged between the bottom of the housing and the first circuit board 700. The first circuit board 700 has a larger area, and the first circuit board 700 can integrate more electrical components, and the area of ​​the second circuit board 900 is reduced to save the internal space of the receiving groove 810. The second circuit board 900 is arranged between the bottom of the housing and the first circuit board 700, and space can be left between the first circuit board 700 and the bottom 610 of the housing 600, so as to accommodate some larger electrical components.

[0129] like Figure 8-Figure 10 As shown, the electrical components fixed to the first circuit board 700 also include electrical components of the primary circuit 131, and the electrical components fixed to the second circuit board 900 also include electrical components of the secondary circuit 132. The first transformer 1000 is electrically used to electrically connect the electrical components of the primary circuit 131 carried by the first circuit board 700 and the electrical components of the secondary circuit 132 carried by the second circuit board 900.

[0130] In this embodiment, the primary circuit 131 of the DC conversion circuit 130 is electrically connected to the secondary circuit 132 through the first transformer 1000. The electrical components of the primary circuit 131 and the electrical components of the secondary circuit 132 are conveniently fixed to the first circuit board 700 and the second circuit board 900, respectively, and are electrically connected through the first transformer 1000. The first transformer 1000 is relatively large in size, and the first transformer 1000 and the second circuit board 900 are arranged together between the first circuit board 700 and the shell bottom 610 of the shell 600. The multi-in-one vehicle power supply device 10 provided in this application has a more compact structure, which is conducive to the heat dissipation of the first transformer 1000.

[0131] In one embodiment, the height of the first transformer 1000 is less than the distance between the first circuit board 700 and the bottom of the receiving groove 810, and greater than the distance between the second circuit board 900 and the bottom of the receiving groove 810, and the second circuit board 900 and the first transformer 1000 are arranged at intervals along the first direction. By arranging the second circuit board 900 and the first transformer 1000 side by side along the first direction, it is convenient to shorten the connection distance between the second circuit board 900 and the first transformer 1000.

[0132] In one embodiment, the first transformer 1000 is connected to the first circuit board 700 by plugging, and the first transformer 1000 is connected to the second circuit board 900 by screwing. The plug-in connection between the first transformer 1000 and the first circuit board 700 is easy to install, and the screw connection between the first transformer 1000 and the second circuit board 900 is relatively firm, so that the first transformer 1000 can be connected to the second circuit board 900 and then fixedly connected to the first circuit board 700 together with the second circuit board 900.

[0133] Along the third direction 003, the second circuit board 900 and the first circuit board 700 are stacked in sequence from bottom to top. The third direction 003 is the stacking direction of the first circuit board 700 and the second circuit board 900. That is, the second circuit board 900 is arranged in parallel with the first circuit board 700. The second circuit board 900 is located between the first circuit board 700 and the shell bottom 610. The area of ​​the second circuit board 900 is less than half of the area of ​​the first circuit board 700. The area of ​​the orthographic projection of the second circuit board 900 on the cover plate 800 is less than half of the area of ​​the orthographic projection of the first circuit board 700 on the cover plate 800.

[0134] The second circuit board 900 is stacked in sequence with the first circuit board 700, which can save space in the plane direction of the vehicle-mounted power supply device 10 provided by the present application along the first circuit board 700, and make its arrangement more compact, so that the vehicle-mounted power supply device 10 provided by the present application can achieve a miniaturized design. In addition, the area of ​​the second circuit board 900 is set to be less than half of the area of ​​the first circuit board 700, and the first circuit board 700 can carry more electrical components. At the same time, the area of ​​the second circuit board 900 can be reduced to save the internal space of the receiving groove 810, so as to facilitate the layout of more components below the first circuit board 700.

[0135] In one embodiment, the shell bottom 610 of the shell 600 is used to fix the first transformer 1000. The height of the first transformer 1000 is less than the distance between the first circuit board 700 and the shell bottom 610, and greater than the distance between the second circuit board 900 and the shell bottom 610. The second circuit board 900 and the first transformer 1000 are arranged in a spaced relationship along the first direction 001.

[0136] Along the third direction 003, the first transformer 1000 is located between the upper PCB board and the shell bottom 610. The first transformer 1000 is fixed to the shell bottom 610 and is spaced apart from the first circuit board 700 along the third direction 003. That is, along the third direction 003, the height of the first transformer 1000 is less than the spacing between the first circuit board 700 and the shell bottom 610. Along the first direction 001, the first transformer 1000 is spaced apart from the second circuit board 900. And along the third direction 003, the height of the first transformer 1000 is greater than the spacing between the second circuit board 900 and the shell bottom 610. The second circuit board 900 and the first transformer 1000 are arranged side by side along the first direction 001, which is convenient for shortening the connection distance between the second circuit board 900 and the first transformer 1000 and optimizing the spatial layout in the receiving groove 810.

[0137] Please see Fig.11 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0138] In one embodiment, the electrical components fixed to the first circuit board 700 also include electrical components of the vehicle charger 110, and the vehicle charger 110 includes an AC-DC conversion circuit. The input end of the AC-DC conversion circuit is used to receive AC power provided by an external power source, and the output end of the AC-DC conversion circuit is used to output DC power to the primary circuit 131 of the DC conversion circuit 130 through the on-board circuit of the first circuit board 700. Along the first direction, the electrical components of the vehicle charger 110 are arranged between the first interface 701 and the electrical components of the primary circuit 131 of the DC conversion circuit 130.

[0139] In this embodiment, the electrical components of the on-board charger 110 are fixed to the first circuit board 700. The output end of the AC-DC conversion circuit is used to output DC power through the primary circuit 131. The electrical components of the on-board charger 110 and the primary circuit 131 are arranged along the first direction 001, and the two are relatively close and located on the same side of the first circuit board 700, which facilitates the electrical connection between the electrical components of the on-board charger 110 and the primary circuit 131, and makes the heat of the first circuit board 700 concentrated, which is convenient for arranging the heat dissipation structure.

[0140] In one embodiment, the first circuit board 700 and the second circuit board 900 respectively include a plurality of power modules 1200, and the first circuit board 700 further includes a control chip 1300. The plurality of power modules 1200 carried by the first circuit board 700 are used to at least form the on-board charger 110 and the primary circuit 131 in the DC conversion circuit 130 of the on-board power supply device 10; the plurality of power modules 1200 carried by the second circuit board 900 are used to form the secondary circuit 132 in the DC conversion circuit 130 of the on-board power supply device 10. The control chip 1300 is used to at least form the vehicle controller 410 of the on-board power supply device 10.

[0141] It should be noted that the power module 1200 refers to a power electronic device that can realize the power conversion function, including but not limited to (Insulated Gate Bipolar Transistor), silicon carbide power tube, silicon tube, MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor) and diode, etc.

[0142] In one embodiment, along the stacking direction of the first circuit board 700 and the second circuit board 900 , the orthographic projection of the lower PCB 900 on the first circuit board 700 at least partially overlaps with the area where the primary circuit 131 is located.

[0143] In one embodiment, along the stacking direction of the first circuit board 700 and the second circuit board 900, the orthographic projection of the second circuit board 900 on the first circuit board 700 overlaps at least partially with the area where the multiple power modules 1200 used to form the primary circuit 131 are located. The secondary circuit 132 carried by the second circuit board 900, the first transformer 1000, and the primary circuit 131 carried by the first circuit board 700 all belong to the DC conversion circuit 130. The secondary circuit 132 carried by the second circuit board 900 is used to connect with the first transformer 1000, and the first transformer 1000 is used to connect with the primary circuit 131 carried by the first circuit board 700. The first transformer 1000 is arranged side by side with the second circuit board 900 along the first direction 001. Along the third direction 003, the orthographic projection of the second circuit board 900 on the first circuit board 700 overlaps at least partially with the area where the primary circuit 131 is located. Therefore, the second circuit board 900 and the first transformer 1000 can be arranged in an area close to the primary circuit 131 carried by the first circuit board 700, so as to shorten the connection distance of the DC conversion circuit 130.

[0144] The control chip 1300 is disposed on the first circuit board 700 and is connected to a part of the on-board circuits in the first circuit board 700. The control chip 1300 is used to at least form a vehicle controller 410 of the vehicle-mounted device. That is, the first circuit board 700 includes the vehicle controller 410. The vehicle controller 410 can also be connected to the remaining electrical components in the vehicle power supply device 10 to receive signals or send control instructions to the remaining electrical components in the vehicle power supply device 10.

[0145] In one embodiment, the vehicle controller 410 is fixed to the surface of the first circuit board 700 facing the cover plate 800. In one embodiment, the vehicle controller 410 is fixed to the surface of the first circuit board 700 facing the shell bottom 610.

[0146] Please see Fig.12 A partial exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, Fig.13 A partial exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, Fig.14 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown, and Fig.15 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0147] The shell 600 includes a shell bottom 610 and four side walls 620. The four side walls 620 are arranged around the shell bottom 610, and the four side walls 620 and the shell bottom 610 together form a receiving groove 810. The cover plate 800 is fixed to the shell 600 and covers the receiving groove 810. The four side walls 620 specifically include a first side wall 621, a second side wall 622, a third side wall 623 and a fourth side wall 624. The first side wall 621 and the second side wall 622 are spaced apart along the first direction 001. And the first side wall 621 is farther away from the second circuit board 900 than the second side wall 622. The third side wall 623 and the fourth side wall 624 are spaced apart along the second direction 002. And the third side wall 623 is farther away from the vehicle charger 110 than the fourth side wall 624.

[0148] In one embodiment, the receiving slot 810 includes a first mounting hole 821, a second mounting hole 822, a third mounting hole 823, and a fourth mounting hole 824. The first mounting hole 821 and the second mounting hole 822 are distributed on the first side wall 621 of the receiving slot 810, and the third mounting hole 823 and the fourth mounting hole 824 are distributed on the second side wall 622 of the receiving slot 810. The first circuit board 700 and the second circuit board 900 are stacked and arranged between the first side wall 621 and the second side wall 622.

[0149] Among them, the first mounting hole 821 is used to install the first connector 831, and the first connector 831 is used to electrically connect the first interface 701 and the external power supply. The second mounting hole 822 is used to install the second connector 832, and the second connector 832 is used to electrically connect the second interface 702 and the power battery 15. The third mounting hole 823 is used to install the third connector 833, and the third connector 833 is used to electrically connect the third interface 703 and the vehicle load. The three-phase copper bus 834 of the vehicle power supply device 10 is connected to the motor through the fourth mounting hole 824, and the vehicle power supply device 10 supplies power to the drive motor 11 through the three-phase copper bus 834.

[0150] In one embodiment, the interval between the first mounting hole 821 and the second mounting hole 822 in the first side wall 621 is greater than the interval between the third mounting hole 823 and the fourth mounting hole 824 in the second side wall 622 .

[0151] Each mounting hole is used to install a connector so that each interface of the electrical component is connected to the outside through the connector. The first mounting hole 821 and the second mounting hole 822 are located on the same side of the first circuit board 700 and are close to the vehicle charger 110 along the first direction 001, so that the first interface 701 and the second interface 702 are electrically connected to the outside through the first connector 831 and the second connector 832 respectively. The third mounting hole 823 and the fourth mounting hole 824 are located on the other side of the first circuit board 700 and are close to the DC conversion circuit 130 along the first direction 001, so that the third interface 703 is connected to the vehicle load through the third connector 833.

[0152] The first interface 701 and the second interface 702 are used to transmit high-voltage alternating current and high-voltage direct current respectively, and the greater distance between the first mounting hole 821 and the second mounting hole 822 can reduce the interference between the high voltages. The fourth mounting hole 824 is close to the drive motor 11, and the distance between the third mounting hole 823 and the fourth mounting hole 824 is smaller, which facilitates the third connector 833 to provide low-voltage direct current to components such as the rotary transformer of the drive motor 11.

[0153] Specifically, the first interface 701 is a high-voltage AC input interface, and the first interface 701 is used to receive a high-voltage charging current provided by an external power source to the vehicle-mounted power supply device 10 of the present application. The first interface 701 is also used to be electrically connected to the vehicle-mounted charger 110. The first circuit board 700 is connected to the first interface 701 through the vehicle-mounted charger 110 to receive the high-voltage charging current. The vehicle-mounted charger 110 is used to convert the received high-voltage charging current from high-voltage AC to high-voltage DC to power the remaining electrical components of the vehicle-mounted power supply device 10 of the present application.

[0154] The second interface 702 is a DC bus interface, and the second interface 702 is used to connect to the power battery 15 to receive the current of the power battery 15 or output current to the power battery 15. The second interface 702 is also used to be electrically connected to the DC conversion circuit 130. The DC conversion circuit 130 is electrically connected to the second interface 702 and to the on-board charger 110. The DC conversion circuit 130 is used to receive power from the on-board charger 110 and output the first DC power through the second interface 702 to charge the power battery 15. The on-board power supply device 10 is also connected to the second interface 702 through the DC conversion circuit 130 to receive the current of the power battery 15 and to power the remaining electrical components of the on-board power supply device 10.

[0155] The third interface 703 is a low-voltage DC output interface. The third interface 703 is used to connect the remaining loads in the electric vehicle 1. The third interface 703 is also used to be electrically connected to the secondary circuit 132. The secondary circuit 132 is connected to the third interface 703 and is electrically connected to the first transformer 1000. The secondary circuit 132 is used to receive power from the on-board charger 110 or the power battery 15 and output a second DC power through the third interface 703 to power the second type of load 14 of the electric vehicle 1. That is, the secondary circuit 132 is used to output a low-voltage DC current through the third interface 703 to power the remaining loads of the electric vehicle 1.

[0156] Please see Fig.16 A partial schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0157] In one embodiment, the receiving groove 810 includes a coolant inlet 1910 and a coolant outlet 1920, the coolant inlet 1910 is distributed on the third side wall 623 of the receiving groove 810, and the coolant outlet 1920 is distributed on the fourth side wall 624 of the receiving groove 810, the first circuit board 700 and the second circuit board 900 are stacked and arranged between the third side wall 623 and the fourth side wall 624, and the distance between the coolant inlet 1910 and the second mounting hole 822 along the second direction 002 is smaller than the distance between the coolant outlet 1920 and the second mounting hole 822, and the second direction 002 is perpendicular to the first direction 001.

[0158] In this embodiment, the all-in-one vehicle-mounted power supply device 10 provided by the present application also dissipates heat through a coolant, and a coolant inlet 1910 and a coolant outlet 1920 are formed on the housing 600 for the coolant to circulate in the receiving tank 810. The coolant inlet 1910 and the coolant outlet 1920 are located on two side walls 620 of the housing 600 that are opposite to each other along the second direction 002, so as to avoid multiple mounting holes and connectors on the first side wall 621 and the second side wall 622, thereby ensuring the safety of the vehicle-mounted power supply device 10.

[0159] The coolant inlet 1910 is closer to the second mounting hole 822 than the coolant outlet 1920 , so the coolant inlet 1910 is closer to the motor controller 421 and the cooling effect of the motor controller 421 is preferentially ensured.

[0160] Please see Fig.17 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0161] In one embodiment, the electrical components fixed to the first circuit board 700 further include electrical components of the motor controller 421, and the electrical components of the motor controller 421 include a power module 1200, which is fixed to a side of the first circuit board 700 facing the bottom of the receiving groove 810. The input end of the power module 1200 is used to receive direct current provided by the power battery 15 through the second interface 702, and the output end of the power module 1200 is used to output alternating current to the drive motor 11.

[0162] In this embodiment, the electrical components of the motor controller 421 are fixed to the first circuit board 700, so that the motor controller 421 receives power from the power battery 15 through the second interface 702. The power module 1200 of the motor controller 421 is fixed to the side of the first circuit board 700 facing the shell bottom 610 of the shell 600, so that the power module 1200 is electrically connected to the drive motor 11, and the structure of the all-in-one vehicle power supply device 10 provided by the present application is more compact.

[0163] In one embodiment, along the second direction 002 , the motor controller 421 is arranged on the side of the vehicle charger 110 facing the vehicle controller 410 . Along the first direction 001 , the motor controller 421 is arranged on the side of the vehicle controller 410 facing the vehicle charger 110 .

[0164] In this embodiment, the motor controller 421 is arranged by utilizing the space of the on-board charger 110 along the second direction 002 toward the vehicle controller 410, that is, utilizing the space of the vehicle controller 410 along the first direction 001 toward the on-board charger 110, so that the on-board power supply device 10 provided by this application has the function of controlling the drive motor 11 of the electric vehicle 1, thereby improving the integration of the on-board power supply device 10 provided by this application. The motor controller 421 is used to receive the current of the power battery 15 and convert it into high-voltage AC current to drive the drive motor 11 of the electric vehicle 1 to work.

[0165] In one embodiment, the multiple power modules 1200 carried by the first circuit board 700 are also used to form the motor controller 421 of the vehicle power supply device 10. In the second direction 002, the power modules 1200 used to form the motor controller 421 are arranged on the side of the multiple power modules 1200 used to form the vehicle charger 110 facing the control chip 1300 used to form the vehicle controller 410. In the first direction 001, the power modules 1200 used to form the motor controller 421 are arranged on the side of the control chip 1300 used to form the vehicle controller 410 facing the multiple power modules 1200 used to form the vehicle charger 110.

[0166] In one embodiment, the power module 1200 is arranged between the second interface 702 and the fourth mounting hole 824 along the first direction 001 .

[0167] Please see Fig.18 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown, and Fig.19 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0168] In one embodiment, the on-board power supply device 10 includes a three-phase copper busbar adapter 1410, and the output end of the power module 1200 is connected to the three-phase copper busbar 834 through the three-phase copper busbar adapter 1410. The AC current output from the output end of the power module 1200 to the drive motor 11 passes through the three-phase copper busbar adapter 1410 and the three-phase copper busbar 834. The three-phase copper busbar adapter 1410 is fixed between the power module 1200 and the bottom of the accommodating groove 810, one end of the three-phase copper busbar adapter 1410 is fixedly connected to the output end of the power module 1200, and the other end of the three-phase copper busbar adapter 1410 is connected to the three-phase copper busbar 834 through three screws. Along the stacking direction of the bottom of the accommodating groove 810 and the first circuit board 700, the projections of the three screws fall into the corresponding three through holes 709 on the first circuit board 700.

[0169] In this embodiment, the motor controller 421 is electrically connected to the drive motor 11 through the three-phase copper busbar 834. The three-phase copper busbar 834 is located on the side of the first circuit board 700 facing the shell bottom 610 of the shell 600. The three-phase copper busbar adapter 1410 is used to electrically connect the three-phase copper busbar 834 and the power module 1200 located on the same side, and the structure of the vehicle power supply device 10 is more compact. The three through holes 709 on the first circuit board 700 are used to avoid the three screws connecting the three-phase copper busbar adapter 1410 and the three-phase copper busbar 834, thereby facilitating the installation and disassembly maintenance between the three-phase copper busbar adapter 1410 and the three-phase copper busbar 834.

[0170] Please see Fig. 20 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0171] In one embodiment, the vehicle power supply device 10 includes a capacitor module 1400, a capacitor module 1400 is used to reduce the electromagnetic radiation of the direct current input from the power battery 15 to the motor controller 421, a capacitor module 1400 includes a magnetic ring and a capacitor, a capacitor module 1400 and a three-phase copper bus adapter 1410 are adjacently fixed between the first circuit board 700 and the bottom of the accommodating groove 810, and a projection of the capacitor module 1400 on the first circuit board 700 at least partially overlaps with the electrical components of the motor controller 421.

[0172] In this embodiment, the side of the three-phase copper bus adapter 1410 is used to fix a capacitor module 1400, and the electrical components of the capacitor module 1400 and the motor controller 421 are at least partially arranged to overlap, which can shorten the transmission distance between the capacitor module 1400 and the motor controller 421 and make the structure of the vehicle power supply device 10 more compact.

[0173] In one embodiment, the housing 600 is used to fix a capacitor module 1400 and a three-phase copper busbar 834 of the motor controller 421. The motor controller 421 is used to connect the drive motor 11 through the capacitor module 1400 and the three-phase copper busbar 834. The capacitor module 1400 and the three-phase copper busbar 834 are arranged on the side of the first circuit board 700 facing the second circuit board 900.

[0174] In one embodiment, a capacitor module 1400 is used to integrate multiple capacitors and multiple magnetic rings. The three-phase copper busbar 834 is used to pass through the bottom 610 of the housing 600 along the stacking direction of the first circuit board 700 and the second circuit board 900 to connect to the drive motor 11 .

[0175] The capacitor module 1400 is fixed to the first circuit board 700 away from the cover plate 800. The capacitor module 1400 includes a plurality of capacitors and a plurality of magnetic rings. The plurality of capacitors and the plurality of magnetic rings of the capacitor module 1400 are connected to the first circuit board 700, and the plurality of capacitors of the capacitor module 1400 are also connected to the three-phase copper bus 834. Some of the capacitors of the plurality of capacitors of the capacitor module 1400 are electrical components of the motor controller 421, and another part of the capacitors of the plurality of capacitors of the capacitor module 1400 includes X capacitors and Y capacitors. The X capacitors and the Y capacitors and the plurality of magnetic rings are used to form a filter circuit. The filter circuit is used to realize the shielding protection function of the motor controller 421.

[0176] The capacitor module 1400 is used to integrate multiple capacitors of the motor controller 421, and multiple capacitors and multiple magnetic rings of the filter circuit for implementing shielding protection of the motor controller 421. By integrating the capacitors of the motor controller 421, the X capacitors, the Y capacitors in the filter circuit, and the magnetic rings, the integration of the motor controller 421 can be improved, and its volume occupied in the housing 600 can be reduced, thereby improving the overall integration of the vehicle-mounted power supply device 10 provided by the present application.

[0177] Please see Fig.21 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown in FIG. Fig. 22 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, and Fig.23 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0178] In one embodiment, the vehicle-mounted power supply device 10 further includes a shielding plate 1100, wherein a first shielding wall 1101 of the shielding plate 1100 abuts against a metal part on the first circuit board 700 facing the bottom of the receiving groove 810, the electrical components of the motor controller 421 are fixed on one side of the first shielding wall 1101, and the electrical components of the vehicle-mounted charger 110 and the electrical components of the DC conversion circuit 130 are fixed on the other side of the first shielding wall 1101. The second shielding wall 1102 of the shielding plate 1100 is arranged between the first interface 701 and the third interface 703, the electrical components of the vehicle-mounted charger 110 are fixed on one side of the second shielding wall 1102, and the electrical components of the first transformer 1000 and the secondary circuit 132 of the DC conversion circuit 130 are fixed on the other side of the second shielding wall 1102.

[0179] In this embodiment, the vehicle power supply device 10 realizes electromagnetic shielding between electrical components through the shielding plate 1100. The first shielding wall 1101 extends approximately along the first direction 001, and is used to shield the electromagnetic interference between the motor controller 421 and the vehicle charger 110 and the DC conversion circuit 130. The second shielding wall 1102 extends approximately along the second direction 002, and the second shielding wall 1102 is located on the side of the first shielding wall 1101 facing the vehicle charger 110 and the DC conversion circuit 130, and the second shielding wall 1102 is used to shield the electromagnetic interference between the vehicle charger 110 and the DC conversion circuit 130.

[0180] The metal piece of the first circuit board 700 facing the shell bottom 610 of the shell 600 is used to abut against the shielding plate 1100 to prevent the electromagnetic signal from leaking from the gap between the first circuit board 700 and the shielding plate 1100 and affecting the shielding effect.

[0181] In one embodiment, the shielding plate 1100 includes a third shielding wall 1103, the electrical components of the vehicle charger 110 include a plurality of common-mode inductors, the plurality of common-mode inductors are arranged at intervals along the second direction 002, and the third shielding wall 1103 extends approximately along the first direction 001 and is arranged between two adjacent common-mode inductors along the second direction 002.

[0182] Another way of describing it is that the vehicle-mounted power supply device 10 provided in the present application includes a plurality of shielding plates 1100, and the plurality of shielding plates 1100 are used to be received and fixed in the receiving groove 810. The plurality of shielding plates 1100 are used to form a plurality of isolation cavities 1110. The plurality of isolation cavities 1110 are used to accommodate some electrical components of the first circuit board 700. In the vehicle-mounted power supply device 10 provided in the present application, the plurality of shielding plates 1100 are used to cooperate with various filtering circuits to form shielding protection for various electrical components in the vehicle-mounted power supply device 10 provided in the present application, thereby reducing electromagnetic interference between various electrical components.

[0183] The vehicle-mounted power supply device 10 provided in the present application accommodates the first circuit board 700, the second circuit board 900 and the first transformer 1000 through the housing 600 and the cover plate 800, which can protect the various components in the vehicle-mounted power supply device 10. By stacking the first circuit board 700 and the second circuit board 900, the internal space of the housing 600 is effectively utilized to avoid the vehicle-mounted power supply device 10 from being too large in the plane direction of the first circuit board 700. A plurality of isolation cavities 1110 are formed by the shielding plate 1100, and a plurality of magnetic components carried by the first circuit board 700 are used to form shielding protection for each electrical component in the vehicle-mounted power supply device 10. The second circuit board 900 carries the capacitor 910 and connects the first transformer 1000 and the first circuit board 700 to ensure the realization of the electrical components on the second circuit board 900. By comparing the area of ​​the first circuit board 700 and the second circuit board 900, the first circuit board 700 can integrate more electrical components, and the area of ​​the second circuit board 900 is reduced to save the internal space of the accommodating groove 810.

[0184] Specifically, the shielding plate 1100 includes a first shielding wall 1101, and the height of the first shielding wall 1101 along the direction in which the first circuit board 700 and the second circuit board 900 are stacked is lower than the height of the side wall 620 of the housing 600. The first circuit board 700 includes a metal piece protruding toward the first shielding wall 1101, and the first shielding wall 1101 abuts against the metal piece along the direction in which the first circuit board 700 and the second circuit board 900 are stacked. The first shielding wall 1101 extends from the shell bottom 610 of the housing 600 toward the first circuit board 700. Along the third direction 003, the height of the first shielding wall 1101 is lower than the height of the side wall 620 of the housing 600. Correspondingly, the first circuit board 700 includes a metal piece, and the metal piece extends in the direction toward the shell bottom 610 along the third direction 003. Along the plane direction of the first circuit board 700, the position and shape of the metal piece are substantially the same as those of the first shielding wall 1101. That is, the orthographic projection of the first shielding wall 1101 on the first circuit board 700 is substantially coincident with the metal piece. The sum of the heights of the first shielding wall 1101 and the metal piece along the third direction 003 is greater than or equal to the distance between the first circuit board 700 and the shell bottom 610 , so that the first shielding wall 1101 and the metal piece abut against each other to form two isolation cavities in the shell 600 .

[0185] Along the second direction 002 , the first shielding wall 1101 and the metal piece are arranged between the primary circuit 131 and the vehicle controller 410 , and the first shielding wall 1101 and the metal piece are also arranged between the vehicle charger 110 and the motor controller 421 .

[0186] The first shielding wall 1101 and the metal piece are used to extend along the first direction 001, and to separate the receiving groove 810 into a first isolation cavity 811 and a second isolation cavity 812 along the second direction 002. The first isolation cavity 811 is used to accommodate at least the second circuit board 900, the first transformer 1000, the primary circuit 131 and the on-board charger 110. The second isolation cavity 812 is used to accommodate at least the vehicle controller 410 and the motor controller 421. A capacitor module 1400 and a three-phase copper bus 834 used to form the motor controller 421 are also located in the second isolation cavity 812. The first shielding wall 1101 and the metal piece are used to achieve electromagnetic shielding between the two isolation cavities to ensure that each electrical component works reliably.

[0187] The metal piece is fixed to the surface of the first circuit board 700 facing the shell bottom 610 to ensure reliable bonding between the metal piece and the surface of the first circuit board 700. By abutting the first shielding wall 1101 with the metal piece, the poor bonding phenomenon caused by the bending deformation of the first circuit board 700 due to its large area can be eliminated, thereby ensuring the shielding effect of the first shielding wall 1101 and the metal piece. The metal piece also reduces the flatness requirement of the first circuit board 700, which is conducive to controlling the manufacturing cost of the first circuit board 700.

[0188] The height of the second shielding wall 1102 is lower than the height of the side wall 620 of the housing 600. The second shielding wall 1102 is used to be arranged between the on-board charger 110 and the DC conversion circuit 130 along the first direction 001. The second shielding wall 1102 is used to separate multiple electrical components carried on the surface of the first circuit board 700 facing the shell bottom 610. Specifically, the second shielding wall 1102 is located in the first isolation cavity 811. The second shielding wall 1102 is used to extend along the second direction 002 and to separate the first isolation cavity 811 into a first isolation sub-cavity 811a and a second isolation sub-cavity 811b along the first direction 001. The on-board charger 110 is located in the first isolation sub-cavity 811a and is used to connect the first interface 701. The DC conversion circuit 130 is located in the second isolation sub-cavity 811b and is used to connect the third interface 703. The second shielding wall 1102 is used to achieve electromagnetic shielding between the two first isolating sub-cavities 811a and the second isolating sub-cavities 811b, that is, to achieve electromagnetic shielding between the on-board charger 110 and the DC conversion circuit 130, so as to ensure that each electrical component works reliably.

[0189] In one embodiment, a metal piece for abutting against the second shielding wall 1102 may also be fixed on the surface of the first circuit board 700 facing the shell bottom 610 , and the second shielding wall 1102 and the metal piece together form a better shielding effect.

[0190] The height of the third shielding wall 1103 is lower than the height of the side wall 620 of the housing 600. The third shielding wall 1103 is used to separate multiple electrical components carried on the surface of the first circuit board 700 facing the housing bottom 610. Specifically, the third shielding wall 1103 is located in the first isolation sub-cavity 811a, and the third shielding wall 1103 is used to extend along the first direction 001 and to separate two adjacent common-mode inductors located in the first isolation sub-cavity 811a. The third shielding wall 1103 is used to achieve electromagnetic shielding between two adjacent common-mode inductors to ensure that each electrical component works reliably.

[0191] Please see Fig.24 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown in FIG. Fig.25 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown, and Fig.26 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0192] In one embodiment, the vehicle-mounted power supply device 10 includes a compressor controller 412 or a second DC conversion circuit 140, the second DC conversion circuit 140 is used to output DC power supply, the electrical components fixed to the first circuit board 700 also include electrical components of the compressor controller 412 or the electrical components of the second DC conversion circuit 140 and a fifth interface 705, the accommodating groove 810 also includes a fifth mounting hole 825, the fifth mounting hole 825 is distributed on the side wall of the accommodating groove 810, the fifth mounting hole 825 is used to install a fifth connecting member 835, the fifth connecting member 835 is used to electrically connect the air-conditioning compressor or the vehicle heater to the fifth interface 705, and the fifth interface 705 is fixed between the first interface 701 and the second interface 702.

[0193] In this embodiment, the first circuit board 700 is also used to fix the electrical components of the compressor controller 412 or the electrical components of the second DC conversion circuit. The all-in-one vehicle power supply device 10 of the present application is also used to connect the cabin heater or the air-conditioning compressor through the fifth interface 705, further improving the integration of the vehicle power supply device 10.

[0194] In one embodiment, the fifth mounting hole 825 is distributed on the first side wall 621 of the accommodating groove 810 , and the interval between the first mounting hole 821 and the fifth mounting hole 825 in the first side wall 621 is smaller than the interval between the second mounting hole 822 and the fifth mounting hole 825 .

[0195] In one embodiment, the first circuit board 700 is further used to connect to the fifth interface 705 of the vehicle-mounted power supply device 10 , and the first circuit board 700 is used to output the first direct current or the first alternating current through the fifth interface 705 .

[0196] In one embodiment, the first circuit board 700 is used to output the first direct current through the fifth interface 705 , and the fifth interface 705 is used to connect to a heater of the electric vehicle 1 .

[0197] Specifically, in the present embodiment, the multiple electrical interfaces of the vehicle-mounted power supply device 10 provided in the present application include a fifth interface 705. The fifth interface 705 is used to connect the heater of the electric vehicle 1. The fifth interface 705 is a high-voltage direct current output interface, and the fifth interface 705 is used to output a first direct current to power the heater of the electric vehicle 1. The fifth interface 705 is also used to connect to the first circuit board 700. The first circuit board 700 includes a second direct current conversion circuit 140. The second direct current conversion circuit 140 is used to receive the current of the power battery 15 and power the various electrical components of the vehicle-mounted power supply device 10. The second direct current conversion circuit 140 is connected to the fifth interface 705. That is, the first circuit board 700 is used to connect the fifth interface 705 through the second direct current conversion circuit 140 to connect the heater of the electric vehicle 1, and output the first direct current to the heater.

[0198] In one embodiment, the electrical components of the compressor controller 412 fixed to the first circuit board 700 are used to output the first alternating current through the fifth interface 705, the fifth interface 705 is used to connect to the compressor of the electric vehicle 1, and the multiple power modules 1200 carried by the first circuit board 700 are also used to form the compressor controller 412 of the vehicle power supply device 10.

[0199] Specifically, in this embodiment, the multiple electrical interfaces of the vehicle-mounted power supply device 10 provided in the present application include a fifth interface 705. The fifth interface 705 is used to connect the compressor of the electric vehicle 1. The fifth interface 705 is a high-voltage AC output interface, and the fifth interface 705 is used to output a first AC power to power the compressor of the electric vehicle 1. The fifth interface 705 is fixed to the first circuit board 700. The first circuit board 700 includes a compressor controller 412 and a second DC conversion circuit 140. The second DC conversion circuit 140 is used to receive the current of the power battery 15 and power the electrical components of the vehicle-mounted power supply device 10. The compressor controller 412 is used to connect to the second DC conversion circuit 140, and is used to receive the power supply of the second DC conversion circuit 140. The compressor controller 412 is also used to connect to the fifth interface 705. That is, the second DC conversion circuit 140 is used to connect the fifth interface 705 and the compressor of the electric vehicle 1 through the compressor controller 412 to output the first AC power to the compressor. The first circuit board 700 is connected to the fifth interface 705 through the second DC conversion circuit 140 and the compressor controller 412 to connect to the compressor of the electric vehicle 1 , and outputs the first AC power to the compressor through the fifth interface 705 to drive the compressor to work.

[0200] In one embodiment, the fifth interface 705 is integrated to output the first direct current and the first alternating current respectively. The fifth interface 705 can be connected to the heater and the compressor of the electric vehicle 1 respectively. The first circuit board 700 includes a second DC conversion circuit 140 and a compressor controller 412, wherein the second DC conversion circuit 140 is used to directly connect to the fifth interface 705 to output the first direct current, and the second DC conversion circuit 140 is also connected to the fifth interface 705 through the compressor controller to output the first alternating current.

[0201] Please see Fig. 27 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown, and Fig.28 The figure shows a partial structural diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application.

[0202] In one embodiment, the housing 600 of the vehicle-mounted power supply device 10 further includes an end cover 1700, a cover plate 800 is used to enclose the receiving groove 810, the cover plate 800 includes a hollow area 814, and the end cover 1700 is used to enclose the hollow area 814. The receiving groove 810 is also used to accommodate at least one fuse 1600, at least one fuse 1600 is used to electrically connect the second interface 702 with at least one of the electrical components of the motor controller 421, the electrical components of the compressor controller 412, or the electrical components of the second DC conversion circuit 140, and at least one fuse 1600 is used to open-circuit protect at least one of the electrical components of the motor controller 421, the electrical components of the compressor controller 412, or the electrical components of the second DC conversion circuit 140. The fuse 1600 is used to achieve fault disconnection of at least some of the electrical components in the vehicle-mounted power supply device 10. The cover plate 800 and the first circuit board 700 are stacked, and the projection area of ​​the hollow area 814 along the stacking direction of the cover plate 800 and the first circuit board 700 covers at least one fuse 1600 .

[0203] In this embodiment, the first circuit board 700 is close to the cover plate 800. By providing a removable end cap 1700 on the cover plate 800 to expose the fuse 1600, the maintenance and replacement of each fuse 1600 can be achieved without removing the entire cover plate 800, thereby improving the maintenance convenience of the vehicle-mounted power supply device 10 provided in this application. Specifically, the end cap 1700 is used to be removably fixed to the body of the cover plate 800 and to shield the hollow area 814. Since the first circuit board 700 is close to the cover plate 800, by providing a removable end cap 1700 on the cover plate 800 to expose the fuse 1600, the maintenance and replacement of each fuse 1600 can be achieved without removing the entire cover plate 800, thereby improving the maintenance convenience of the vehicle-mounted power supply device 10 provided in this application.

[0204] In one embodiment, the second DC conversion circuit 140 includes at least one fuse 1600, and the fuse 1600 is used to connect the power battery 15. That is, at least one fuse 1600 is used to at least form the second DC conversion circuit 140 of the vehicle-mounted power supply device 10.

[0205] In one embodiment, at least one fuse 1600 is used to connect the on-board charger 110 and the second interface 702. The on-board charger 110 is located inside the on-board charger 110, and the second interface 702 is used to connect the power battery 15 of the electric vehicle 1. Thus, the on-board charger 110 to the battery pack can be disconnected from the fault by at least one fuse 1600.

[0206] In one embodiment, at least one fuse 1600 is used to connect the second interface 702 and the fifth interface 705. The second interface 702 is used to connect the power battery 15 of the electric vehicle 1, and the fifth interface 705 is used to connect the heater and / or compressor of the electric vehicle 1. Thus, the at least one fuse 1600 can realize the fault cutoff of the power battery 15 to the heater and the power battery 15 to the compressor.

[0207] In the embodiment where the fifth interface 705 is connected to the compressor controller, at least one fuse 1600 is used to connect the second interface 702 and the compressor controller. The second interface 702 is used to connect the power battery 15 of the electric vehicle 1, thereby achieving fault disconnection from the power battery 15 to the compressor controller through at least one fuse 1600.

[0208] Please see Fig.29 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown in FIG. Fig.30 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0209] In one embodiment, the vehicle-mounted power supply device 10 includes a vehicle controller 410. Fig.29 In the schematic diagram, the vehicle controller 410 is represented by two control chips 1300. In the embodiment of the present application, the number of specific control chips 1300 of the vehicle controller 410 is not limited. The electrical components fixed to the first circuit board 700 also include the electrical components of the vehicle controller 410 and the sixth interface 706, and the electrical components of the motor controller 421 are fixed between the sixth interface 706 and the second interface 702. The vehicle controller 410 is used to transmit control signals through the sixth interface 706 to control the vehicle-mounted equipment. The accommodating slot 810 also includes a sixth mounting hole 826, and the sixth mounting hole 826 is distributed at the bottom of the accommodating slot 810. The sixth mounting hole 826 is used to install the sixth connecting member 836, and the sixth connecting member 836 is used to electrically connect the sixth interface 706 with the vehicle-mounted equipment.

[0210] In this embodiment, the first circuit board 700 is also used to fix the electrical components of the vehicle controller 410 and the sixth interface 706. The all-in-one vehicle power supply device 10 of this application is also used to output a control signal through the sixth interface 706 to control the vehicle-mounted equipment of the electric vehicle 1, further improving the integration of the vehicle-mounted power supply device 10. In one embodiment, the vehicle-mounted equipment of the electric vehicle 1 includes one or more of an accelerator pedal, a brake pedal, a lighting lamp, a steering gear, and an air conditioner.

[0211] Specifically, the sixth interface 706 is used to electrically connect one or more of the accelerator pedal of the electric vehicle 1, the brake pedal of the electric vehicle 1, the lighting of the electric vehicle 1, the steering gear of the electric vehicle 1, and the air conditioner of the electric vehicle 1. The sixth interface 706 is also used to electrically connect to the first circuit board 700. The first circuit board 700 includes a vehicle controller 410. The vehicle controller 410 is electrically connected to the sixth interface 706. The first circuit board 700 is connected to the sixth interface 706 through the vehicle controller 410 to connect one or more of the accelerator pedal of the electric vehicle, the brake pedal of the electric vehicle, the lighting of the electric vehicle, the steering gear of the electric vehicle, and the air conditioner of the electric vehicle. The vehicle controller 410 is used to receive signals or send control instructions to the accelerator pedal of the electric vehicle, the brake pedal of the electric vehicle, the lighting of the electric vehicle, the steering gear of the electric vehicle, and the air conditioner of the electric vehicle.

[0212] In one embodiment, the primary circuit 131 and the vehicle controller 410 are arranged at intervals along the second direction 002. In this embodiment, the distance between the vehicle controller 410 and the vehicle charger 110 on the first circuit board 700 is relatively far, which can reduce the influence of electromagnetic interference generated by the vehicle charger 110 when working on the vehicle controller 410.

[0213] The primary circuit 131 in the DC conversion circuit 130 in the vehicle power supply device 10 provided by the present application is arranged in a spaced relationship with the vehicle controller 410 along the second direction 002, and is arranged in a spaced relationship with the vehicle charger 110 and the DC conversion circuit 130 along the first direction 001. As a result, in the first circuit board 700, the vehicle controller 410 and the vehicle charger 110 are relatively far apart, which can reduce the influence of electromagnetic interference generated by the vehicle charger 110 when working on the vehicle controller 410.

[0214] In one embodiment, the vehicle-mounted power supply device 10 includes a filter, and the first circuit board 700 is used to fix the electrical components of the filter, and the filter is used to achieve electromagnetic shielding between the remaining electrical components in the vehicle-mounted power supply device 10. In one embodiment, the electrical components of the filter include multiple magnetic devices. Or it can be described as that the first circuit board 700 also includes multiple magnetic devices, and the multiple magnetic devices are connected to the circuit in the first circuit board 700 to form a part of the electrical components. The multiple magnetic devices are used to form multiple filter circuits with part of the circuit in the first circuit board 700. The filter circuit can be used as a part of the electrical component and is used to form electromagnetic shielding protection for the remaining electrical components in the vehicle-mounted power supply device 10 provided in the present application.

[0215] Please see Fig.31 A partial structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown, and Fig.32 A partially exploded schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0216] In one embodiment, the vehicle power supply device 10 provided by the present application includes at least one shielding cover, which is used to be fixed to the first circuit board 700 to isolate electromagnetic interference. Among them, one shielding cover is used to cover multiple pins or pins electrically connected to the sixth interface 706 and the sixth connector 836.

[0217] The vehicle-mounted power supply device 10 provided in the present application includes a first shielding cover 1810. Along the third direction 003, the first shielding cover 1810 is located on the side of the first circuit board 700 away from the second circuit board 900, and is fixed to the first circuit board 700. The first shielding cover 1810 is used to accommodate and shield the vehicle controller 410 and the sixth interface 706, as well as the sixth connector 836. The electromagnetic interference generated by the multiple pins or pins electrically connecting the sixth interface 706 and the sixth connector 836 is relatively large. By isolating the multiple pins or pins electrically connecting the sixth interface 706 and the sixth connector 836 on the first circuit board 700 through the first shielding cover 1810, the electromagnetic interference of the remaining electrical components in the vehicle-mounted power supply device 10 to the vehicle controller 410 can be reduced, thereby ensuring that the vehicle controller 410 works reliably.

[0218] In one embodiment, the first shielding cover 1810 is used to completely shield the vehicle controller 410 .

[0219] In one embodiment, a shielding cover is used to cover a plurality of pins or plugs electrically connected to the first interface 701 and the first connector 831 .

[0220] The vehicle-mounted power supply device 10 provided in the present application includes a second shielding cover 1820. Along the third direction 003, the second shielding cover 1820 is located on the side of the first circuit board 700 away from the second circuit board 900, and is fixed to the first circuit board 700. The second shielding cover 1820 is used to cover the multiple pins or pins electrically connected to the first interface 701 and the first connector 831. Specifically, the multiple pins or pins of the first interface 701 are used to connect the first connector 831. The electromagnetic interference generated by the multiple pins or pins connected to the first connector 831 and the first interface 701 is relatively large. By isolating the multiple pins or pins on the first circuit board 700 by the second shielding cover 1820, the area of ​​the first circuit board 700 close to the first interface 701 can be electromagnetically protected to ensure that the vehicle-mounted power supply device 10 of the present application meets the safety requirements. It also reduces the electromagnetic interference of the remaining electrical components in the vehicle-mounted power supply device 10 to the vehicle charger 110, ensuring that the vehicle charger 110 works reliably.

[0221] Please see Fig.33 A partial exploded structural diagram of a vehicle-mounted power supply device 10 provided in an embodiment of the present application is shown, and Fig.34 A partial schematic diagram of a vehicle-mounted power supply device 10 provided in one embodiment of the present application is shown.

[0222] In one embodiment, the coolant inlet 1910 is used to connect the coolant outlet 1920 through the first heat sink 2010 and the second heat sink 2020 in sequence. The first heat sink 2010 and the second heat sink 2020 are arranged between the housing 600 and the cover plate 800, and the orthographic projection of the first heat sink 2010 on the first circuit board 700 at least partially overlaps with the drive motor controller 421 of the vehicle power supply device 10, and the orthographic projection of the second heat sink 2020 on the first circuit board 700 at least partially overlaps with the vehicle charger 110.

[0223] In this implementation, the vehicle-mounted power supply device 10 provided by the present application includes a first heat sink 2010 and a second heat sink 2020. The first heat sink 2010 and the second heat sink 2020 are arranged along the second direction 002. Along the third direction 003, the first heat sink 2010 and the second heat sink 2020 are arranged between the first circuit board 700 and the shell bottom 610 of the shell 600. Along the third direction 003, the orthographic projection of the first heat sink 2010 on the first circuit board 700 overlaps at least partially with the motor controller 421 of the vehicle-mounted power supply device 10; the orthographic projection of the second heat sink 2020 on the first circuit board 700 overlaps at least partially with the vehicle charger 110 and the DC conversion circuit 130. The third side wall 623 includes a coolant inlet 1910, and the fourth side wall 624 includes a coolant outlet 1920. The coolant inlet 1910 is arranged relatively close to the motor controller 421. The coolant inlet 1910 is used to connect to the coolant outlet 1920 through the first heat dissipation plate 2010 and the second heat dissipation plate 2020 in sequence.

[0224] In this embodiment, the first heat sink 2010 is used to dissipate heat for the motor controller 421, and the second heat sink 2020 is used to dissipate heat for the on-board charger 110 and the DC conversion circuit 130. The coolant inlet 1910 near the motor controller 421 is connected to the coolant outlet 1920 through the first heat sink 2010 and the second heat sink 2020 in sequence. This can ensure reliable heat dissipation of the motor controller 421, and simultaneously achieve heat dissipation for the on-board charger 110 and the DC conversion circuit 130.

[0225] In one embodiment, the second heat dissipation plate 2020 and the shielding plate 1100 are integrally provided.

[0226] Please see Fig.35 The structure diagram of the vehicle power supply device 10 provided in one embodiment of the present application is shown.

[0227] The present application also provides a power assembly 200, which includes a drive motor 11 and a vehicle-mounted power supply device 10 provided in any of the above-mentioned embodiments. The drive motor 11 is electrically connected to the vehicle-mounted power supply device 10 through the three-phase copper busbar 834 of the vehicle-mounted power supply device 10, and the vehicle-mounted power supply device 10 outputs a three-phase current to drive the drive motor 11 to rotate. In one embodiment, the accommodating groove 810 of the vehicle-mounted power supply device 10 and the housing of the drive motor 11 are an integrated housing 600, and the bottom of the accommodating groove 810 shares part of the housing 600 with the housing of the drive motor 11. The power assembly 200 provided in the present application accommodates the vehicle-mounted power supply device 10 and the drive motor 11 respectively through the integrated housing 600, so that the structure of the power assembly 200 is more compact, and it is convenient for the multi-in-one vehicle-mounted power supply device 10 provided in the present application to be electrically connected to the drive motor 11 through the three-phase copper busbar 834.

[0228] Specifically, along the third direction 003, the drive motor 11 is located on the side of the shell bottom 610 in the vehicle-mounted power supply device 10 of the present application that is away from the first circuit board 700. For the sake of distinction, the shell of the drive motor 11 is defined as a second shell 17. The second shell 17 is used to be fixed to the side of the shell bottom 610 of the shell 600 that is away from the first circuit board 700. The second shell 17 is used to accommodate and protect the drive motor 11. The shell 600 and the second shell 17 are an integral structure. That is, the side wall 620 of the shell 600 is used to extend below the shell bottom 610 and form the second shell 17. The second shell 17 has a motor accommodating cavity for accommodating the drive motor 11. The integral molding of the shell 600 and the second shell 17 can eliminate the fixing connector and positioning hole between the two, thereby reducing the overall volume of the vehicle-mounted power supply device 10 provided in the present application.

[0229] In one embodiment, the housing 600 and the second housing 17 are processed separately and assembled to form a shape. This embodiment simplifies the structure of the housing 600 and the second housing 17 by processing them separately, which can save costs.

[0230] In one embodiment, the shell bottom 610 of the shell 600 of the vehicle-mounted power supply device 10 includes a mechanical limit interface, and the shell 600 is used to be fixedly connected to the shell of the drive motor 11 through the mechanical limit interface. This embodiment also facilitates the three-phase copper bus 834 of the motor controller 421 in the vehicle-mounted power supply device 10 to be electrically connected to the drive motor 11, so as to improve the overall integration of the power assembly 200.

[0231] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of protection 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 equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An all-in-one vehicle-mounted power supply device, which is applied to an electric vehicle, characterized in that: The on-board power supply device includes a motor controller, an on-board charger and a DC conversion circuit. The housing of the on-board power supply device includes a receiving groove, and the receiving groove is used to receive a first circuit board and a second circuit board. The electrical components of the motor controller, the electrical components of the on-board charger and the electrical components of the DC conversion circuit are respectively fixed to at least one of the first circuit board and the second circuit board. The electrical components fixed to the first circuit board include a first interface and a second interface, and the electrical components fixed to the second circuit board include a third interface, wherein: The on-board charger is used to receive AC power provided by an external power source through the first interface and to output DC power through the second interface to charge the power battery; The motor controller is used to receive direct current output from the power battery of the electric vehicle through the second interface and to output alternating current to drive the driving motor of the electric vehicle; The DC conversion circuit is used to supply power to the on-board load of the electric vehicle through the third interface.

2. The vehicle-mounted power supply device according to claim 1, characterized in that: The area of ​​the second circuit board is smaller than half of that of the first circuit board, and the second circuit board is arranged between the bottom of the housing and the first circuit board.

3. The vehicle-mounted power supply device according to claim 1 or 2, characterized in that: The DC conversion circuit includes a primary circuit, a first transformer and a secondary circuit. The electrical components fixed to the first circuit board also include electrical components of the primary circuit. The electrical components fixed to the second circuit board also include electrical components of the secondary circuit. The first transformer is used to electrically connect the electrical components of the primary circuit carried by the first circuit board and the electrical components of the secondary circuit carried by the second circuit board.

4. The vehicle-mounted power supply device according to any one of claims 1 to 3, characterized in that: The first transformer is connected to the first circuit board by plugging and is connected to the second circuit board by screwing.

5. The vehicle-mounted power supply device according to claim 3 or 4, characterized in that: The electrical components fixed to the first circuit board also include electrical components of the on-board charger, and the on-board charger includes an AC-DC conversion circuit, wherein: The input end of the AC-DC conversion circuit is used to receive AC power provided by an external power source, and the output end of the AC-DC conversion circuit is used to output DC power to the primary circuit of the DC conversion circuit through the on-board circuit of the first circuit board; Along the first direction, the electrical components of the AC-DC conversion circuit are arranged between the first interface and the electrical components of the primary circuit of the DC conversion circuit.

6. The vehicle-mounted power supply device according to any one of claims 1 to 5, characterized in that: The receiving slot includes a first mounting hole, a second mounting hole, a third mounting hole, and a fourth mounting hole, the first mounting hole and the second mounting hole are distributed on a first side wall of the receiving slot, the third mounting hole and the fourth mounting hole are distributed on a second side wall of the receiving slot, and the first circuit board and the second circuit board are stacked and arranged between the first side wall and the second side wall, wherein: The first mounting hole is used to mount a first connector, and the first connector is used to electrically connect the first interface and the external power supply; The second mounting hole is used to mount a second connector, and the second connector is used to electrically connect the second interface and the power battery; The third mounting hole is used to mount a third connector, and the third connector is used to electrically connect the third interface and the vehicle-mounted load; The three-phase copper busbar of the vehicle-mounted power supply device is connected to the motor through the fourth mounting hole, and the vehicle-mounted power supply device supplies power to the motor through the three-phase copper busbar; The interval between the first mounting hole and the second mounting hole in the first side wall is greater than the interval between the third mounting hole and the fourth mounting hole in the second side wall.

7. The vehicle-mounted power supply device according to claim 6, characterized in that: The receiving groove includes a coolant inlet and a coolant outlet, the coolant inlet is distributed on the third side wall of the receiving groove, and the coolant outlet is distributed on the fourth side wall of the receiving groove, the first circuit board and the second circuit board are stacked and arranged between the third side wall and the fourth side wall, and the distance between the coolant inlet and the second mounting hole along the second direction is smaller than the distance between the coolant outlet and the second mounting hole, and the second direction is perpendicular to the first direction.

8. The vehicle-mounted power supply device according to any one of claims 1 to 7, characterized in that: The electrical components fixed to the first circuit board also include the electrical components of the motor controller, and the electrical components of the motor controller include a power module, and the power module is fixed on a side of the first circuit board facing the bottom of the accommodating groove, wherein: The input end of the power module is used to receive direct current provided by the power battery through the second interface, and the output end of the power module is used to output alternating current to the motor.

9. The vehicle-mounted power supply device according to claim 8, characterized in that: The on-board power supply device includes a three-phase copper bar adapter, the output end of the power module is connected to the three-phase copper bar through the three-phase copper bar adapter, the AC current output from the output end of the power module to the motor passes through the three-phase copper bar adapter and the three-phase copper bar, the three-phase copper bar adapter is fixed between the power module and the bottom of the accommodating groove, one end of the three-phase copper bar adapter is fixedly connected to the output end of the power module, and the other end of the three-phase copper bar adapter is connected to the three-phase copper bar through three screws, and along the stacking direction of the bottom of the accommodating groove and the first circuit board, the projections of the three screws fall into the corresponding three through holes on the first circuit board.

10. The vehicle-mounted power supply device according to claim 9, characterized in that: The vehicle-mounted power supply device includes a capacitor module, which is used to reduce the electromagnetic radiation of the direct current input from the power battery to the motor controller. The capacitor module includes a magnetic ring and a capacitor. The capacitor module is fixed adjacent to the three-phase copper busbar adapter between the first circuit board and the bottom of the accommodating groove. The projection of the capacitor module on the first circuit board at least partially overlaps with the electrical components of the motor controller.

11. The vehicle-mounted power supply device according to any one of claims 1 to 10, characterized in that: The vehicle-mounted power supply device further includes a shielding plate, which is used to shield electromagnetic interference between any two of the electrical components of the motor controller, the electrical components of the vehicle-mounted charger, and the electrical components of the DC conversion circuit, and the shielding plate is fixed between the bottom of the accommodating groove and the first circuit board, wherein: The first shielding wall of the shielding plate is in contact with the metal piece on the first circuit board facing the bottom of the receiving groove, the electrical components of the motor controller are fixed on one side of the first shielding wall, and the electrical components of the on-board charger and the electrical components of the DC conversion circuit are fixed on the other side of the first shielding wall; The second shielding wall of the shielding plate is arranged between the first interface and the third interface, the electrical components of the vehicle charger are fixed on one side of the second shielding wall, and the electrical components of the DC conversion circuit and the secondary circuit are fixed on the other side of the second shielding wall.

12. The vehicle-mounted power supply device according to any one of claims 1 to 11, characterized in that: The vehicle-mounted power supply device includes a compressor controller or a second DC conversion circuit, the second DC conversion circuit is used to output DC power supply, the electrical components fixed to the first circuit board also include the electrical components of the compressor controller or the electrical components of the second DC conversion circuit and a fifth interface, the accommodating groove also includes a fifth mounting hole, the fifth mounting holes are distributed on the side walls of the accommodating groove, the fifth mounting holes are used to install a fifth connector, the fifth connector is used to electrically connect the air-conditioning compressor or the vehicle heater to the fifth interface, and the fifth interface is fixed between the first interface and the second interface.

13. The vehicle-mounted power supply device according to any one of claims 1 to 12, characterized in that: The housing of the vehicle-mounted power supply device further includes a cover plate and an end cover, wherein the cover plate is used to enclose the receiving groove, the cover plate includes a hollow area, and the end cover is used to enclose the hollow area, wherein: The receiving slot is further used to receive at least one fuse, the at least one fuse is used to electrically connect the second interface with at least one of the electrical components of the motor controller, the electrical components of the compressor controller, or the electrical components of the second DC conversion circuit, and the at least one fuse is used to open-circuit protect at least one of the electrical components of the motor controller, the electrical components of the compressor controller, or the electrical components of the second DC conversion circuit; The cover plate and the first circuit board are stacked, and a projection area of ​​the hollow region along a direction in which the cover plate and the first circuit board are stacked covers the at least one fuse.

14. The vehicle-mounted power supply device according to any one of claims 1 to 13, characterized in that: The vehicle-mounted power supply device includes a vehicle controller, wherein: The electrical components fixed to the first circuit board also include an electrical component of a vehicle controller and a sixth interface, the electrical component of the motor controller is fixed between the sixth interface and the second interface, and the vehicle controller is used to transmit a control signal through the sixth interface to control the vehicle-mounted device; The receiving slot also includes a sixth mounting hole, which is distributed at the bottom of the receiving slot and is used to install a sixth connecting member, and the sixth connecting member is used to electrically connect the sixth interface with the vehicle-mounted device.

15. A powertrain, characterized in that: The power assembly includes a drive motor and an on-board power supply device as described in any one of claims 1 to 14, the accommodating groove of the on-board power supply device and the housing of the drive motor are an integrated housing, the bottom of the accommodating groove and the housing of the drive motor share part of the housing, the drive motor is connected to the on-board power supply device through the three-phase copper busbar of the on-board power supply device, and the on-board power supply device outputs a three-phase current to drive the drive motor to rotate.

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