Vehicle-mounted device and electric vehicle

Abstract

The invention provides a vehicle-mounted device and an electric vehicle, a shell of the vehicle-mounted device comprises an electrical containing groove and an internal water inlet channel, an inlet of the internal water inlet channel is distributed outside the electrical containing groove, and an outlet of the internal water inlet channel is distributed in the electrical containing groove. Wherein the electrical containing groove is used for containing the first metal plate radiator and the shielding support, the shielding support, the first metal plate radiator and the groove bottom of the electrical containing groove are sequentially stacked in the arrangement direction of the groove bottom and a groove opening of the electrical containing groove, and the shielding support is used for containing a plurality of magnetic devices of a vehicle-mounted charger in the vehicle-mounted device. An inlet of the first metal plate radiator is used for communicating with an outlet of the internal water inlet channel, the first metal plate radiator is used for fixing the shielding support and cooling the multiple magnetic devices contained in the shielding support, and the first metal plate radiator improves the heat dissipation effect on the magnetic devices. And the thickness of the water channel groove of the first sheet metal radiator formed by adopting the sheet metal process is small, so that the overall height of the vehicle-mounted device can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a vehicle-mounted device and an electric vehicle. Background Art

[0002] Existing electric vehicles usually use a powertrain as a power source. Currently, the powertrain includes multiple components such as a motor, a reducer, and a power supply device. In order to achieve the diversification of the powertrain's functions, more and more functional modules will be integrated into the power supply device. The functional modules will generate heat during operation, and water channels need to be added to cool the functional modules. However, the current power supply device uses a die-cast bracket to accommodate the magnetic components of the on-board charger, and a water channel is die-cast at the bottom of the die-cast bracket to connect with the water channel of the powertrain or power supply device housing. The receiving groove of the die-cast bracket and the water channel at its bottom are die-cast as a whole, with high integration. However, the walls of the die-cast bracket and the water channel are relatively thick, resulting in poor heat dissipation effect. It also makes the height of the powertrain or power supply device high, which is inconvenient for the layout of the powertrain or power supply device in the entire vehicle. Summary of the Invention

[0003] The present application provides a vehicle-mounted device and an electric vehicle, which are used to reduce the height of the vehicle-mounted device.

[0004] In a first aspect, the present application provides a vehicle-mounted device, wherein the housing of the vehicle-mounted device includes an electrical containment slot and an internal water inlet channel, wherein the inlet of the internal water inlet channel is located outside the electrical containment slot, and the outlet of the internal water inlet channel is located inside the electrical containment slot. The electrical containment slot is used to accommodate a first sheet metal heat sink and a shielding bracket, wherein the shielding bracket, the first sheet metal heat sink, and the bottom of the electrical containment slot are stacked in sequence along the arrangement direction of the bottom and the slot opening of the electrical containment slot. The shielding bracket is used to accommodate multiple magnetic components of an on-board charger in the vehicle-mounted device, the inlet of the first sheet metal heat sink is used to communicate with the outlet of the internal water inlet channel, and the first sheet metal heat sink is used to secure the shielding bracket and to cool the multiple magnetic components accommodated by the shielding bracket.

[0005] In this embodiment of the present application, the inlet of the internal water inlet channel is located outside the electrical containment slot. This allows the inlet to conveniently receive cooling water from the vehicle's cooling system and direct it into the internal water inlet channel within the electrical containment slot, dissipating heat for the electrical components within the electrical containment slot. The outlet of the internal water inlet channel is located within the electrical containment slot, allowing cooling water to be directly fed into the first sheet metal radiator within the electrical containment slot through the outlet of the internal water inlet channel. This further facilitates the first sheet metal radiator within the electrical containment slot receiving cooling water delivered by the internal water inlet channel.

[0006] In an embodiment of the present application, the shielding bracket, the first sheet metal radiator and the bottom of the electrical receiving groove are stacked in sequence along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove, so that the groove bottom of the electrical receiving groove can provide support for the first sheet metal radiator, and the first sheet metal radiator can provide support for the shielding bracket, which is beneficial to improving the reliability of the vehicle-mounted device.

[0007] In the embodiment of the present application, the first sheet metal radiator is formed by a sheet metal process, and the material of the first sheet metal radiator is sheet metal material. The thermal conductivity of the material of the first sheet metal radiator is higher than that of the die-cast bracket material. Using the first sheet metal radiator as the bottom plate supporting the shielding bracket and as a flow channel can improve the heat dissipation efficiency. The large area of ​​the first sheet metal radiator is also beneficial to reducing the temperature in the electrical receiving slot. In addition, since the die-casting process requires the thickness of the die-cast product to be thicker in order to be die-cast and the height of the die-cast product to be higher in order to be demolded, the wall thickness of the flow channel in the die-cast bracket is larger and the height of the flow channel groove is higher. The sheet metal process adopts a stamping or stretching process, so that the wall thickness of the flow channel formed by stamping in the first sheet metal radiator is smaller than that of the flow channel formed by die-casting at the bottom of the die-cast bracket, which is beneficial to reducing the height of the vehicle-mounted device along the arrangement direction of the bottom and the slot of the electrical receiving slot.

[0008] In this embodiment, a shielding bracket and a first sheet metal heat sink are stacked along the bottom and opening of the electrical containment slot. The shielding bracket accommodates multiple magnetic components of the onboard charger in the vehicle device, allowing them to be supported by the first sheet metal heat sink. Compared to using a die-cast housing to integrally form the bracket and flow channel, the combined structure of the first sheet metal heat sink and shielding bracket facilitates reducing the height of the vehicle device, making it more adaptable to the space layout of more rear-wheel drive vehicles.

[0009] In an embodiment of the present application, the inlet of the first sheet metal radiator is used to connect to the outlet of the internal water inlet channel. The first sheet metal radiator is used to fix the shielding bracket and to cool the multiple magnetic components accommodated by the shielding bracket, so that the cooling water input into the shell of the vehicle-mounted device from the inlet of the internal water inlet channel can be output to the inlet of the first sheet metal radiator through the outlet of the internal water inlet channel, thereby entering the first sheet metal radiator to cool the multiple magnetic components accommodated by the shielding bracket, which is beneficial to ensure the normal operation of the vehicle-mounted device.

[0010] In an embodiment of the present application, a first sheet metal radiator is used to fix the shielding bracket and the internal water inlet channel for connecting to the shell. The first sheet metal radiator has a higher thermal conductivity than the flow channel formed by the bottom of the die-cast bracket, which can make the heat dissipation effect of the magnetic device better. In addition, the groove thickness of the flow channel of the first sheet metal radiator formed by the sheet metal process is relatively small, which is conducive to reducing the height of the vehicle-mounted device along the arrangement direction of the bottom and the slot of the electrical receiving slot, and optimizing the layout of the vehicle-mounted device in the entire vehicle.

[0011] In one embodiment, the shielding bracket includes a first receiving hole, which passes through the shielding bracket along the arrangement direction of the bottom and the slot of the electrical receiving slot. The first sheet metal heat sink is used to enclose the first receiving hole to form a first receiving slot for accommodating the magnetic device, and the first sheet metal heat sink is used to form the bottom of the first receiving slot.

[0012] In an embodiment of the present application, a first receiving hole passes through the shielding bracket along the arrangement direction of the bottom and the notch of the electrical receiving groove, and the first sheet metal heat sink is used to enclose the first receiving hole to form a first receiving groove for accommodating the magnetic device, so that the magnetic device can be passed through the first receiving hole of the shielding bracket, so that the arrangement of the magnetic device fully utilizes the thickness space of the shielding bracket along the arrangement direction of the bottom and the notch of the electrical receiving groove, which is conducive to reducing the overall height of the vehicle-mounted device along the arrangement direction of the bottom and the notch of the electrical receiving groove.

[0013] In an embodiment of the present application, the first sheet metal heat sink is used to form the bottom of the first receiving groove, and the first sheet metal heat sink is reused as the bottom of the first receiving groove for receiving the magnetic device, so that the magnetic device can be directly fixed to the first sheet metal heat sink and contact the first sheet metal heat sink, which is beneficial to improving the heat dissipation effect of the magnetic device, thereby helping to improve the cooling efficiency of the vehicle charger.

[0014] In one embodiment, the shielding bracket includes a plurality of first receiving holes, and the first sheet metal heat sink is used to enclose the plurality of first receiving holes to form a plurality of first receiving slots for respectively accommodating a plurality of magnetic components. In one embodiment, the first receiving slots are used to accommodate AC filter components. In another embodiment, the first receiving slots are used to accommodate PFC capacitors.

[0015] In one embodiment, the first sheet metal heat sink includes a plurality of fixing holes, and the plurality of fixing holes penetrate the two side surfaces of the first sheet metal heat sink along the arrangement direction of the bottom and the slot of the electrical receiving slot. The plurality of fixing holes are used to accommodate fixing parts for fixing the shielding bracket, and the fixing parts protrude outward from the fixing holes on the surface of the first sheet metal heat sink.

[0016] In an embodiment of the present application, multiple fixing holes are formed along the bottom and notch of the electrical receiving slot, extending through the two side surfaces of the first sheet metal heat sink. The first sheet metal heat sink is used to fix the shielding bracket, so screws need to be passed through the fixing holes to fix the shielding bracket to the first sheet metal heat sink. However, the wall thickness of the first sheet metal heat sink is relatively thin, making it inconvenient to process internal threads in the fixing holes. Moreover, the small wall thickness also results in insufficient internal thread length, leading to unstable screw fixation. This solution simplifies the thread forming process by accommodating a fixing member for fixing the shielding bracket in the fixing hole and causing the fixing member to protrude outward from the fixing hole onto the surface of the first sheet metal heat sink. Furthermore, the fixing member can extend the contact length between the first sheet metal heat sink and the screw, allowing the shielding bracket to be more firmly fixed to the first sheet metal heat sink.

[0017] In one embodiment, the first sheet metal heat sink and the shielding bracket are fixed by forming fixing holes that pass through the two side surfaces of the first sheet metal heat sink. The fixing holes can also be used to directly fix the magnetic device or the circuit board of the DC converter, simplifying the assembly process.

[0018] In one embodiment, the electrical receiving slot is also used to accommodate the circuit board and heat conduction plate of the DC converter. The circuit board of the DC converter is directly fixed to the surface of the first sheet metal heat sink facing the notch of the electrical receiving slot. The circuit board of the DC converter and the shielding bracket are arranged adjacent to each other along the length direction of the first sheet metal heat sink, so that the DC converter can be directly cooled by the first sheet metal heat sink. Since the fixing member of the first sheet metal heat sink protrudes outward from the fixing hole of the first sheet metal heat sink, there is a gap between the circuit board at the bottom of the DC converter and the first sheet metal heat sink and they cannot directly contact each other, resulting in poor thermal conductivity. Therefore, the heat conduction plate is arranged between the first sheet metal heat sink and the DC converter along the arrangement direction of the bottom of the electrical receiving slot and the notch, so that the heat of the DC converter can be transferred to the first sheet metal heat sink through the heat conduction plate, which can effectively improve the heat dissipation efficiency of the DC converter and help ensure the normal operation of the DC converter.

[0019] In one embodiment, the first sheet metal heat sink includes a first sheet metal plate and a second sheet metal plate. The first sheet metal plate is arranged on a side of the second sheet metal plate facing the bottom of the electrical containment slot. The first sheet metal plate and the second sheet metal plate are used to enclose an internal flow channel of the first sheet metal heat sink. The first sheet metal plate includes a first opening that extends through the first sheet metal plate along the alignment direction of the bottom and slot opening of the electrical containment slot. The first opening serves to form an inlet for the first sheet metal heat sink.

[0020] In an embodiment of the present application, the first sheet metal radiator includes a first sheet metal plate and a second sheet metal plate, so that the first sheet metal radiator can be directly formed by welding the two sheet metal plates, which simplifies the processing process. In one embodiment, the first sheet metal plate and the second sheet metal plate are welded using a brazing process. The first sheet metal plate and the second sheet metal plate are used to enclose the internal flow channel of the first sheet metal radiator, allowing cooling water to flow through the internal flow channel of the first sheet metal radiator, thereby enabling the first sheet metal radiator to cool the multiple magnetic components of the on-board charger.

[0021] In an embodiment of the present application, the first sheet metal plate includes a first opening extending through the first sheet metal plate along the alignment direction of the bottom and notch of the electrical receiving slot. The first opening serves to form an inlet for a first sheet metal heat sink. This ensures that the first opening does not occupy additional space on the first sheet metal plate along the alignment direction of the bottom and notch of the electrical receiving slot, and that the inlet for the first sheet metal heat sink does not increase the thickness of the first sheet metal plate. This facilitates reducing the height of the vehicle-mounted device along the alignment direction of the bottom and notch of the electrical receiving slot. In one embodiment, the first opening can be formed in the first sheet metal plate by laser cutting, thereby achieving higher precision in forming the first opening.

[0022] In the embodiment of the present application, a first opening extends through the first sheet metal plate, extending along the alignment of the bottom and notch of the electrical housing slot. Compared to the die-cast housing, which requires a die-cast process to form a raised nozzle as the flow channel inlet, the first opening is formed in the first sheet metal plate using a simpler process, a smaller thickness, and less material, thus reducing production costs. The first opening serves as the inlet for the first sheet metal heat sink and also allows the first opening to receive cooling water from the outlet of the internal water inlet channel and feed the cooling water into the internal flow channel of the first sheet metal heat sink.

[0023] In one embodiment, the bottom of the electrical containment slot includes a sealing slot, which surrounds the outer periphery of the outlet of the internal water inlet channel, the aperture of the first opening is smaller than the aperture of the outlet of the internal water inlet channel, and a portion of the first sheet metal plate on the edge of the first opening is stacked on a sealing ring in the sealing slot.

[0024] In an embodiment of the present application, the sealing groove surrounds the outer periphery of the outlet of the internal water inlet channel, the aperture of the first opening is smaller than the aperture of the outlet of the internal water inlet channel, and a portion of the first sheet metal plate at the edge of the first opening is stacked on the sealing ring in the sealing groove, so that the first opening of the first sheet metal plate can be sealed with the outlet of the internal water inlet channel through the sealing ring in the sealing groove, preventing the cooling water transported from the outlet of the internal water inlet channel from leaking in the electrical receiving groove, which is beneficial to ensuring the normal operation of multiple magnetic components of the on-board charger in the electrical receiving groove.

[0025] In one embodiment, the first sheet metal plate is recessed away from the second sheet metal plate to form a flow channel groove, the bottom of the flow channel groove protrudes from the surface of the first sheet metal plate away from the second sheet metal plate, and the flow channel groove is used to enclose the second sheet metal plate to form an internal flow channel of the first sheet metal radiator.

[0026] In an embodiment of the present application, the first sheet metal plate is recessed away from the second sheet metal plate to form a flow groove, and the bottom of the flow groove protrudes from the surface of the first sheet metal plate away from the second sheet metal plate, so that the groove wall thickness of the flow groove formed by the first sheet metal plate remains basically the same as the thickness at other positions of the first sheet metal plate. The flow groove is used to enclose the second sheet metal plate to form an internal flow channel of the first sheet metal radiator, which is beneficial for the first sheet metal radiator forming the internal flow channel to remain relatively small along the arrangement direction of the bottom and the groove opening of the electrical receiving groove, thereby helping the vehicle-mounted device to have a smaller height and facilitating the layout of the vehicle-mounted device in the entire vehicle.

[0027] In one embodiment, the first sheet metal heat sink further includes a spoiler structure disposed within the flow channel. The spoiler structure can agitate the cooling water within the first sheet metal heat sink, thereby improving the first sheet metal heat sink's efficiency in dissipating heat from the magnetic components of the on-board charger.

[0028] In one embodiment, the second sheet metal plate is planar.

[0029] In the embodiment of the present application, the second sheet metal plate is planar, resulting in a smooth surface, which facilitates the regular arrangement of the shielding bracket and the multiple magnetic components of the onboard charger above the first sheet metal heat sink. The planarity of the second sheet metal plate also ensures a uniform thickness and a relatively low height along the bottom and opening of the electrical receiving slot. This facilitates the reduction of the height of the first sheet metal heat sink formed by the second sheet metal plate, thereby reducing the height of the onboard device and facilitating its layout within the vehicle.

[0030] In one embodiment, the second sheet metal plate includes a second receiving hole, which passes through the second sheet metal plate along the arrangement direction of the bottom and the slot of the electrical receiving slot. The edge of the second receiving hole is welded to the first sheet metal plate. The second receiving hole is used to enclose the first sheet metal plate to form a second receiving slot, and the second receiving slot is used to accommodate some magnetic components.

[0031] In an embodiment of the present application, a second receiving hole passes through the second sheet metal plate along the arrangement direction of the bottom and the slot of the electrical receiving slot, and the edge of the second receiving hole is welded to the first sheet metal plate, so that the cooling water in the internal flow channel of the first sheet metal heat sink will not leak from the second receiving hole, so that the magnetic device can operate normally.

[0032] In an embodiment of the present application, the second receiving hole is used to enclose the first sheet metal plate to form a second receiving slot. The second receiving slot is used to accommodate a portion of the magnetic components. This allows the arrangement of the portion of the magnetic components to utilize the thickness of the second sheet metal plate along the direction in which the bottom and opening of the electrical receiving slot are aligned. This helps reduce the overall height of the first sheet metal heat sink and the portion of the magnetic components of the on-board charger along the direction in which the bottom and opening of the electrical receiving slot are aligned, thereby helping to reduce the height of the on-board device. The edge of the second receiving hole is welded to the first sheet metal plate. The second receiving slot is used to accommodate the portion of the magnetic components. This also helps to allow cooling water in the internal flow channel of the first sheet metal heat sink to flow around the portion of the magnetic components, thereby improving the heat dissipation efficiency of the portion of the magnetic components.

[0033] In one embodiment, a first sheet metal radiator is formed by brazing a first sheet metal plate and a second sheet metal plate. Compared with the existing die-cast shell formed by a groove and a cover plate, the first sheet metal radiator does not require additional seals, which can make the first sheet metal radiator thinner and the processing process simpler.

[0034] In one embodiment, the thickness of the first sheet metal plate is greater than or equal to 1.5 mm and less than or equal to 3 mm. In one embodiment, the thickness of the second sheet metal plate is greater than or equal to 1.5 mm and less than or equal to 3 mm. This reduces the overall thickness of the first sheet metal heat sink, which helps reduce the height of the vehicle-mounted device. It also allows the cooling water in the internal flow channel of the first sheet metal heat sink to better absorb heat from the magnetic components of the vehicle-mounted charger, improving the cooling efficiency of the vehicle-mounted device.

[0035] In one embodiment, the electrical containment slot also accommodates a second sheet metal heat sink and a first connecting nozzle. The first sheet metal heat sink includes a second opening that connects to its internal flow channel. The opening of the second opening faces the notch of the electrical containment slot, along the alignment of the bottom and notch of the electrical containment slot. The first connecting nozzle connects the second opening to the internal flow channel of the second sheet metal heat sink. A portion of the surface of the first sheet metal heat sink surrounding the second opening is welded to the first connecting nozzle, which is stacked between the first and second sheet metal heat sinks.

[0036] In an embodiment of the present application, the first sheet metal radiator includes a second opening connected to its internal flow channel. The opening of the second opening is toward the notch of the electrical receiving slot along the arrangement direction of the bottom and the notch of the electrical receiving slot, so as to facilitate the second opening to be connected with the first connecting water nozzle in the electrical receiving slot. The first connecting water nozzle is used to connect the second opening and the internal flow channel of the second sheet metal radiator, so that the second opening can transport the cooling water in the internal flow channel of the first sheet metal radiator to the internal flow channel of the second sheet metal radiator through the first connecting water nozzle. The second sheet metal radiator is arranged in the electrical receiving slot, so that the second sheet metal radiator can cool the magnetic components in the electrical receiving slot.

[0037] In an embodiment of the present application, part of the surface of the first sheet metal radiator around the second opening is used for welding the first connecting water nozzle, which simplifies the installation and fixing process of the first connecting water nozzle and is also beneficial for preventing cooling water from leaking from the connection when the second opening transports cooling water to the first connecting water nozzle.

[0038] In an embodiment of the present application, the first connecting water nozzle is stacked between the first sheet metal radiator and the second sheet metal radiator, so that the first sheet metal radiator and the second sheet metal radiator can be connected through the first connecting water nozzle and stacked at intervals in the electrical receiving groove, so that the cooling water can flow in parallel and series in the first sheet metal radiator and the second sheet metal radiator, so that the magnetic components in the electrical receiving groove can be cooled by the first sheet metal radiator and the second sheet metal radiator at the same time, resulting in better heat dissipation effect, which is beneficial to improving the cooling efficiency of the vehicle-mounted device.

[0039] In one embodiment, the second opening includes two openings, one for communicating with the inlet of the second sheet metal radiator, and the other for communicating with the outlet of the second sheet metal radiator. This allows cooling water in the internal flow channel of the first sheet metal radiator to flow from one opening, the inlet of the second sheet metal radiator, into the internal flow channel of the second sheet metal radiator. After flowing through the internal flow channel of the second sheet metal radiator, the cooling water flows out from the outlet of the second sheet metal radiator and the other opening back into the internal flow channel of the first sheet metal radiator, thereby achieving parallel flow of cooling water in the first and second sheet metal radiators, which is beneficial for improving the cooling efficiency of the vehicle-mounted device.

[0040] In one embodiment, the electrical containment slot is also used to accommodate a water-cooled radiator for the motor controller. The second sheet metal plate further includes a third opening, which is used to form an outlet for the first sheet metal radiator and communicate with the internal flow channel of the first sheet metal radiator. The third opening penetrates the second sheet metal plate along the arrangement direction of the bottom and the slot of the electrical containment slot. The second sheet metal plate is also used to weld a second connecting water nozzle, which is stacked on the second sheet metal plate and is used to connect the third opening to the inlet of the water-cooled radiator. This allows cooling water in the internal flow channel of the first sheet metal radiator to be input into the water-cooled radiator through the third opening, thereby dissipating heat from the bus capacitor and power module of the motor controller.

[0041] In one embodiment, the shell of the vehicle-mounted device also includes an internal water outlet channel, which is used to connect to the outlet of the water-cooled radiator, so that the cooling water in the water-cooled radiator can flow out of the shell of the vehicle-mounted device from the internal water outlet channel, which is conducive to the circulation of cooling water.

[0042] In one embodiment, cooling water from the vehicle cooling system is delivered from the internal water inlet channel of the vehicle-mounted device housing to the inlet of the first sheet metal radiator. A portion of the cooling water flows directly in the internal flow channel of the first sheet metal radiator, is directly output from the outlet of the first sheet metal radiator and the second connecting nozzle to the inlet of the water-cooled radiator, and finally is output from the outlet of the water-cooled radiator to the internal water outlet channel and flows out of the electrical storage tank. Another portion of the cooling water flows from the internal flow channel of the first sheet metal radiator through an opening of the first connecting nozzle, flows into the inlet of the second sheet metal radiator, flows through the internal flow channel of the second sheet metal radiator, and then flows out of the outlet of the second sheet metal radiator to another opening, thereby flowing back into the internal flow channel of the first sheet metal radiator to merge with the cooling water in the internal flow channel of the first sheet metal radiator, and finally is output from the outlet of the first sheet metal radiator to the water-cooled radiator and finally is output from the internal water outlet channel to the electrical storage tank. The cooperation of the first sheet metal radiator, the first connecting water nozzle, the second connecting water nozzle, the second sheet metal radiator and the water-cooled radiator allows the cooling water to flow in parallel and in series in the electrical receiving tank, so that the on-board charger and motor controller in the electrical receiving tank can be cooled more fully, which is beneficial to improving the cooling efficiency of the on-board devices.

[0043] In one embodiment, the electrical containment slot is further configured to accommodate a circuit board carrying multiple magnetic components, and a second sheet metal heat sink is stacked between the circuit board and the shielding bracket. The shielding bracket includes a relief hole extending through the shielding bracket along the alignment of the bottom and notch of the electrical containment slot. The relief hole is configured to pass through the first connecting water spout.

[0044] In an embodiment of the present application, the second sheet metal radiator is stacked between the circuit board and the shielding bracket, so that the second sheet metal radiator can be arranged using the space between the circuit board and the shielding bracket, so that the second sheet metal radiator does not occupy too much space in the height direction of the vehicle-mounted device, which is conducive to making the volume of the vehicle-mounted device in the height direction smaller.

[0045] In an embodiment of the present application, the shielding bracket is arranged between the first sheet metal radiator and the second sheet metal radiator. The shielding bracket includes an avoidance hole. The avoidance hole passes through the shielding bracket along the arrangement direction of the bottom and the slot of the electrical receiving slot, thereby facilitating the arrangement of the first connecting water nozzle connecting the first sheet metal radiator and the second sheet metal radiator through the avoidance hole of the shielding bracket.

[0046] In one embodiment, the shielding bracket further includes a first groove for accommodating a plurality of magnetic components. The depth of the first groove along the direction of arrangement of the bottom and opening of the electrical receiving groove is greater than the depth of the avoidance hole, and at least a portion of the second sheet metal heat sink is stacked between the circuit board and the wall of the avoidance hole.

[0047] In an embodiment of the present application, the shielding bracket also includes a first groove for accommodating multiple magnetic devices. The first groove can serve as a shielding wall to electrically isolate the magnetic devices in the first groove from other magnetic devices, so that the vehicle-mounted charger can operate normally. The first groove can also provide support for the magnetic devices, thereby improving the reliability of the vehicle-mounted device.

[0048] In an embodiment of the present application, the depth of the first groove along the direction of arrangement of the groove bottom and groove opening of the electrical receiving groove is greater than the depth of the avoidance hole. At least a portion of the second sheet metal heat sink is stacked between the circuit board and the hole wall of the avoidance hole, so that the second sheet metal heat sink can fully utilize the portion of the groove wall space of the first groove that is higher than the avoidance hole for arrangement. The arrangement of the second sheet metal heat sink does not excessively occupy the space outside the shielding bracket along the direction of arrangement of the groove bottom and groove opening of the electrical receiving groove, which is conducive to reducing the height of the vehicle-mounted device. Compared with stacking the second sheet metal heat sink above the circuit board along the direction of arrangement of the groove bottom and groove opening of the electrical receiving groove, the height of the vehicle-mounted device can be effectively reduced.

[0049] In one embodiment, the difference between the groove depth of the first groove and the hole depth of the avoidance hole along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove is greater than the thickness of the second sheet metal heat sink.

[0050] In an embodiment of the present application, the difference between the groove depth of the first groove and the hole depth of the avoidance hole along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove is greater than the thickness of the second sheet metal radiator, so that the second sheet metal radiator can be completely arranged between the height difference between the first groove and the avoidance hole along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove, so that the arrangement between the second sheet metal radiator, the circuit board and the shielding bracket is more compact, and the second sheet metal radiator will not occupy additional space outside the shielding bracket along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove, which is conducive to reducing the height of the vehicle-mounted device.

[0051] In one embodiment, the shielding bracket also includes a second groove for accommodating the transformer of the vehicle charger, the first groove is used to accommodate the AC filter component, the first groove, the avoidance hole and the second groove are arranged in sequence, the groove depth of the second groove is smaller than the groove depth of the first groove, and part of the second sheet metal heat sink is also stacked between the circuit board and the second groove.

[0052] In an embodiment of the present application, the shielding bracket further includes a second groove for accommodating the onboard charger's transformer, a first groove for accommodating the AC filter component, and a relief hole for passing the first connecting water spout. The first groove, the relief hole, and the second groove are arranged in sequence, so that the AC filter component, the first connecting water spout, and the onboard charger's transformer are arranged in sequence. The first groove and the second groove can also serve as a shielding wall to reduce electrical interference between the AC filter component and the onboard charger's transformer, allowing the AC filter component and the onboard charger's transformer to operate relatively independently, which is beneficial to ensuring the normal operation of the onboard device.

[0053] In an embodiment of the present application, the groove depth of the second groove is smaller than the groove depth of the first groove, and part of the second sheet metal radiator is also stacked between the circuit board and the second groove, so that the second sheet metal radiator can make full use of the part of the groove wall space where the first groove is higher than the second groove for arrangement, so that the arrangement of the second sheet metal radiator will not occupy too much space outside the arrangement direction of the groove bottom and the groove opening of the shielding bracket along the electrical receiving groove, which is conducive to making the height of the vehicle-mounted device smaller.

[0054] In an embodiment of the present application, part of the second sheet metal radiator is also stacked between the circuit board and the second groove, so that the second sheet metal radiator can simultaneously cool the circuit board and the transformer of the on-board charger in the second groove, which is beneficial to improving the heat dissipation efficiency of the on-board device.

[0055] In one embodiment, the AC filter components in the first groove include multiple inductors and multiple capacitors, and the onboard charger transformer in the second groove includes a DC-DC transformer and an LLC transformer. In one embodiment, the second groove also accommodates a PFC inductor, thereby ensuring a regular layout of the magnetic components within the shielding bracket.

[0056] In one embodiment, the shielding bracket also includes a third receiving hole, which passes through the groove wall of the first groove. The third receiving hole is used to pass through the AC filter connector, so that the AC filter connector can directly electrically connect the external AC power supply with the AC filter component, which is beneficial for the external input AC power to be filtered by the AC filter component and then input into the multiple magnetic components of the on-board charger.

[0057] In one embodiment, the housing of the vehicle-mounted device includes a first mounting hole, a second mounting hole, a third mounting hole, and a fourth mounting hole. The first, second, third, and fourth mounting holes extend through the wall of the electrical receiving slot. The first mounting hole is used to mount a DC connector, which is used to electrically connect the power battery and the bus capacitor. The second mounting hole and the third mounting hole are aligned along the length of the first sheet metal heat sink. The second and third mounting holes are used together to mount an AC filter connector, which is used to electrically connect an external AC power source and an AC filter component. The third mounting hole is used to mount a low-voltage load connector, allowing the vehicle-mounted charger to supply low-voltage current to the low-voltage load through the low-voltage load connector. The fourth mounting hole is used to mount a power supply connector, which is used to electrically connect to a heater, allowing the vehicle-mounted charger to provide current to the heater. The second and third mounting holes are arranged opposite each other along the length of the first sheet metal heat sink. The first, third, and fourth mounting holes are spaced apart along the width of the first sheet metal heat sink, so that the connectors on the housing of the vehicle-mounted device are neatly arranged.

[0058] In one embodiment, the surface of the circuit board facing the second sheet metal heat sink is used to carry multiple power tubes of the vehicle charger, and multiple power tubes are stacked on the second sheet metal heat sink along the arrangement direction of the bottom and the slot of the electrical receiving slot.

[0059] In an embodiment of the present application, the surface of the circuit board facing the second sheet metal radiator is used to carry multiple power tubes of the vehicle charger. Multiple power tubes are stacked on the second sheet metal radiator along the arrangement direction of the bottom and the slot of the electrical receiving slot, so that the multiple power tubes are closer to the second sheet metal radiator, which is beneficial for the second sheet metal radiator to dissipate heat for the multiple power tubes and is beneficial to improving the cooling effect of the power tubes.

[0060] In one embodiment, the internal flow channel of the second sheet metal heat sink includes multiple spoiler structures, which is beneficial to improving the heat dissipation effect of the second sheet metal heat sink on the power tube and the transformer of the on-board charger.

[0061] In one embodiment, the housing of the vehicle-mounted device also includes a motor slot and a reducer slot, the notches of the motor slot and the reducer slot are opposite to each other, the motor slot is used to accommodate the motor stator and motor rotor of the drive motor, the reducer slot is used to accommodate the gear assembly of the reducer, and the electrical accommodation slot is stacked on the motor slot and the reducer slot.

[0062] In the embodiment of this application, the electrical housing, motor housing, and reducer housing are integrally die-cast, enhancing the structural strength of the vehicle-mounted device housing. The electrical housing is stacked above the motor and reducer housings. The arrangement of the first sheet metal heat sink, shielding bracket, and second sheet metal heat sink within the electrical housing reduces the overall height of the vehicle-mounted device, facilitating its placement within the vehicle.

[0063] In a second aspect, the present application provides an electric vehicle, which includes a power battery and an on-board device as in the first aspect, wherein the on-board device is configured to receive power from an external power source to charge the power battery.

[0064] In the vehicle-mounted device in the embodiment of the present application, a first sheet metal radiator is used to fix the shielding bracket and the internal water inlet channel for connecting to the shell. The first sheet metal radiator has a higher thermal conductivity than the flow channel formed by the bottom of the die-cast bracket, which can make the heat dissipation effect of the magnetic device better. In addition, the water channel groove of the first sheet metal radiator formed by the sheet metal process is relatively thin, which is conducive to reducing the overall height of the vehicle-mounted device along the arrangement direction of the bottom and the slot of the electrical receiving slot, and optimizing the layout of the vehicle-mounted device in the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0066] Figure 1 This is a schematic diagram of an electric vehicle provided in an embodiment of the present application;

[0067] Figure 2 is a schematic diagram of a vehicle-mounted device provided in an embodiment of the present application;

[0068] Figure 3 is another schematic diagram of the vehicle-mounted device provided in an embodiment of the present application;

[0069] Figure 4 yes Figure 3 An exploded view of the vehicle-mounted device;

[0070] Figure 5 is another schematic diagram of the vehicle-mounted device provided in an embodiment of the present application;

[0071] Figure 6 yes Figure 5 An exploded view of the vehicle-mounted device;

[0072] Figure 7 This is a schematic diagram of a housing of a vehicle-mounted device provided in an embodiment of the present application;

[0073] Figure 8 This is a schematic diagram of a first sheet metal heat sink provided in an embodiment of the present application;

[0074] Figure 9 This is a schematic diagram of a shielding bracket provided in an embodiment of the present application;

[0075] Figure 10 is another schematic diagram of the first sheet metal heat sink provided in an embodiment of the present application;

[0076] Figure 11 yes Figure 10 An exploded view of the first sheet metal radiator;

[0077] Figure 12 This is a schematic diagram of a first sheet metal radiator, a first connecting water nozzle, and a second sheet metal radiator provided in an embodiment of the present application;

[0078] Figure 13 yes Figure 12 An exploded view of the first sheet metal radiator, the first connecting water nozzle and the second sheet metal radiator;

[0079] Figure 14 yes Figure 9 A cross-sectional view of the shielding bracket in FIG.

[0080] Figure 15 This is another schematic diagram of the vehicle-mounted device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0081] The technical solutions in the embodiments of the present application will be described below 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, rather than all the embodiments.

[0082] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this application are explained and described below.

[0083] PFC: The abbreviation of Power Factor Correction, also known as power factor correction, mainly controls the waveform of the input current to synchronize it with the input voltage waveform, improve the power factor and reduce the harmonic content.

[0084] DCDC: DC stands for Direct Current. DCDC refers to a device that converts DC power of one voltage level to DC power of another voltage level. DCDCs are categorized as step-up or step-down power supplies based on the voltage level conversion relationship. For example, the DCDC converter in a vehicle's power supply system converts high-voltage DC power to low-voltage DC power.

[0085] LLC: Refers to a resonant converter topology, also known as the LLC Resonant Half-Bridge Converter. It is widely used in switching power supplies (such as chargers, server power supplies, and LED drivers) due to its high efficiency, high power density, and soft switching characteristics.

[0086] The present application provides a vehicle-mounted device, the housing of which includes an electrical containment slot and an internal water inlet channel, the inlet of the internal water inlet channel being located outside the electrical containment slot, and the outlet of the internal water inlet channel being located inside the electrical containment slot. The electrical containment slot is configured to accommodate a first sheet metal heat sink and a shielding bracket, wherein the shielding bracket, the first sheet metal heat sink, and the bottom of the electrical containment slot are stacked in sequence along the arrangement direction of the bottom and the slot opening of the electrical containment slot. The shielding bracket is configured to accommodate multiple magnetic components of an onboard charger in the vehicle-mounted device, the inlet of the first sheet metal heat sink is configured to communicate with the outlet of the internal water inlet channel, and the first sheet metal heat sink is configured to secure the shielding bracket and cool the multiple magnetic components accommodated by the shielding bracket.

[0087] By using the first sheet metal radiator to fix the shielding bracket and the internal water inlet channel for connecting to the shell, the first sheet metal radiator has a higher thermal conductivity than the flow channel formed by the bottom of the die-cast bracket, which can better dissipate heat of the magnetic device. In addition, the water channel groove of the first sheet metal radiator formed by the sheet metal process is smaller in thickness, which is conducive to reducing the overall height of the vehicle-mounted device along the arrangement direction of the bottom and the slot of the electrical receiving slot.

[0088] Figure 1 It is a schematic diagram of the electric vehicle 1 provided in an embodiment of the present application.

[0089] In one embodiment, an electric vehicle 1 includes a power battery 10 and an on-board device 20. In the embodiment of the present application, the electric vehicle 1 refers to a wheeled device driven or towed by a power device. In one embodiment, the on-board device 20 may be an on-board charger. In one embodiment, the on-board device 20 may be a power supply device including an on-board charger and a motor controller. In one embodiment, the on-board device 20 may be an all-in-one power supply device including multiple functional devices such as an on-board charger, a motor controller, a power distribution device, and a vehicle controller. In one embodiment, the on-board device 20 includes a power supply device, a drive motor, and a reducer, wherein the on-board device 20 may also be referred to as a powertrain or an all-in-one powertrain.

[0090] Figure 2 It is a schematic diagram of the vehicle-mounted device 20 provided in an embodiment of the present application.

[0091] In one embodiment, if Figure 1 and Figure 2As shown, the vehicle-mounted device 20 includes a power supply device 21, a drive motor 22 and a reducer 23. In the embodiment of the present application, the vehicle-mounted charger of the power supply device 21 is used to receive external AC or DC power to charge the power battery 10. The motor controller of the power supply device 21 receives the high-voltage DC power delivered by the power battery 10, and converts the high-voltage DC power into high-voltage AC power and transmits it to the drive motor 22, driving the drive motor 22 to rotate. The drive motor 22 is transmission-connected to the reducer 23, and the drive motor 22 drives the reducer 23 to rotate. In the embodiment of the present application, the vehicle-mounted device 20 can also be referred to as a powertrain.

[0092] In an embodiment of the present application, the drive motor 22 includes a motor shaft (not shown), a motor stator (not shown) and a motor rotor (not shown). The reducer 23 includes a gear set (not shown), an input shaft (not shown) and an output shaft (not shown). The motor rotor in the drive motor 22 is fixedly sleeved on the motor shaft, and the motor stator drives the motor 22 rotor to rotate after receiving alternating current, thereby driving the motor shaft to rotate. The motor shaft of the drive motor 22 is connected to the input shaft of the reducer 23, and the input shaft receives the power transmitted by the motor shaft of the drive motor 22 and transmits the power to the output shaft through the gear assembly, and the output shaft drives the wheels 30 of the electric vehicle 1 to travel. The reducer 23 includes a parallel shaft reducer or a planetary reducer.

[0093] Figure 3 is another schematic diagram of the vehicle-mounted device 20 provided in an embodiment of the present application. Figure 4 yes Figure 3 An exploded diagram of the vehicle-mounted device 20 in FIG.

[0094] In one embodiment, if Figures 1 to 4 As shown, the power supply device 21 includes an onboard charger 100, a motor controller 200, and a vehicle controller. The full name of the motor controller 200 is Motor Control Unit, abbreviated as MCU. In one embodiment, the motor controller 200 is used to receive DC power from the power battery 10 and convert the DC power into AC power to transmit to the stator winding of the drive motor 22 to enable the drive motor 22 to operate. Figure 3 The motor controller 200 in the figure is only a schematic position of the motor controller 200 and does not represent a specific structure.

[0095] The on-board charger 100 is called an On-Board Charger (OBC). In one embodiment, the on-board charger 100 is used to convert AC power from the grid into DC power or directly transmit the DC power to charge the power battery 10 or power the vehicle's loads.

[0096] The vehicle control unit (VCU) is abbreviated as the vehicle control unit (VCU). In one embodiment, the VCU is responsible for normal vehicle operation, brake energy regeneration, energy routing and network routing for the vehicle's drive system and power battery 10, fault diagnosis and handling, and vehicle status monitoring.

[0097] In one embodiment, the vehicle-mounted device 20 is used to receive power from an external power source to charge the power battery 10. In the embodiment of the present application, the vehicle-mounted device 20 may also be referred to as a power supply device 21 or a vehicle-mounted charger 100.

[0098] The current on-board device uses a die-cast bracket to accommodate the magnetic components of the on-board charger, and forms a water channel at the bottom of the die-cast bracket to connect with the water channel of the shell of the on-board device. The receiving groove of the die-cast bracket and the water channel at the bottom are die-casted as one piece. The walls of the die-cast bracket and the water channel formed by the die-casting process are relatively thick, resulting in poor heat dissipation effect. It also makes the height of the on-board device high, which is inconvenient for the layout of the on-board device in the entire vehicle.

[0099] This application uses a first sheet metal radiator to fix the shielding bracket and the internal water inlet channel for connecting to the shell. The first sheet metal radiator has a higher thermal conductivity than the flow channel formed by the bottom of the die-cast bracket, which can make the heat dissipation effect of the magnetic device better. In addition, the water channel groove thickness of the first sheet metal radiator formed by the sheet metal process is relatively small, which is conducive to reducing the height of the vehicle-mounted device along the arrangement direction of the bottom and the slot of the electrical receiving slot, and optimizing the layout of the vehicle-mounted device in the entire vehicle.

[0100] The vehicle-mounted device 20 provided in an embodiment of the present application will be described in detail below.

[0101] Figure 5 is another schematic diagram of the vehicle-mounted device 20 provided in an embodiment of the present application. Figure 6 yes Figure 5 An exploded view of the vehicle-mounted device 20, Figure 7 is a schematic diagram of the housing 300 of the vehicle-mounted device 20 provided in an embodiment of the present application. Figure 8 is a schematic diagram of a first sheet metal heat sink 400 provided in an embodiment of the present application. Figure 9 Schematic diagram of a shielding bracket 500 provided in an embodiment of the present application.

[0102] In one embodiment, if Figures 3 to 7As shown, the housing 300 of the vehicle-mounted device 20 includes an electrical receiving slot 310 and an internal water inlet channel 320. The inlet 321 of the internal water inlet channel 320 is located outside the electrical receiving slot 310, and the outlet 322 of the internal water inlet channel 320 is located inside the electrical receiving slot 310. The electrical receiving slot 310 is used to accommodate the first sheet metal heat sink 400 and the shielding bracket 500. Along the arrangement direction Z of the slot bottom 311 and the slot opening 312 of the electrical receiving slot 310, the shielding bracket 500, the first sheet metal heat sink 400, and the slot bottom 311 of the electrical receiving slot 310 are stacked in sequence, as shown in FIG. Figure 9 As shown, the shielding bracket 500 is used to accommodate multiple magnetic components 110 of the vehicle charger 100 in the vehicle device 20, such as Figure 4 、 Figure 7 and Figure 8 As shown, the inlet 410 of the first sheet metal radiator 400 is used to communicate with the outlet 322 of the internal water inlet channel 320, as shown in FIG. Figure 3 As shown, the first sheet metal heat sink 400 is used to fix the shielding support 500 and to cool the plurality of magnetic components 110 accommodated in the shielding support 500 .

[0103] In this embodiment of the present application, the inlet 321 of the internal water inlet channel 320 is located outside the electrical receiving slot 310. This allows the inlet 321 of the internal water inlet channel 320 to conveniently receive cooling water from the vehicle's cooling system and input it into the internal water inlet channel 320 within the electrical receiving slot 310, dissipating heat from the electrical components within the electrical receiving slot 310. The outlet 322 of the internal water inlet channel 320 is located within the electrical receiving slot 310, allowing cooling water to be directly input into the first sheet metal radiator 400 within the electrical receiving slot 310 through the outlet 322 of the internal water inlet channel 320. This further facilitates the first sheet metal radiator 400 within the electrical receiving slot 310 receiving the cooling water delivered by the internal water inlet channel 320.

[0104] In an embodiment of the present application, the shielding bracket 500, the first sheet metal heat sink 400 and the bottom 311 of the electrical receiving groove 310 are stacked in sequence along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, so that the groove bottom 311 of the electrical receiving groove 310 can provide support for the first sheet metal heat sink 400, and the first sheet metal heat sink 400 can provide support for the shielding bracket 500, which is beneficial to improving the reliability of the vehicle-mounted device 20.

[0105] In the embodiment of the present application, the first sheet metal heat sink 400 is formed using a sheet metal process. The material of the first sheet metal heat sink 400 is sheet metal. In one embodiment, the sheet metal material includes aluminum alloy and stainless steel. The material of the first sheet metal heat sink 400 has a higher thermal conductivity than the material of the die-cast bracket. Using the first sheet metal heat sink 400 as the base plate supporting the shielding bracket 500 and as a flow channel can improve heat dissipation efficiency. The large area of ​​the first sheet metal heat sink 400 also helps reduce the temperature within the electrical receiving slot 310. In addition, since the die-casting process requires that the thickness of the die-cast product must be thicker in order to be die-cast and the height of the die-cast product must be higher in order to be demolded, the wall thickness of the flow channel in the die-cast bracket is larger and the height of the flow channel groove is higher. The sheet metal process adopts a stamping or stretching process, so that the wall thickness of the flow channel stamped in the first sheet metal radiator 400 is smaller than that of the flow channel die-casted at its bottom using a die-cast bracket, which is beneficial to reducing the height of the vehicle-mounted device 20 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310.

[0106] In this embodiment of the present application, the shielding bracket 500 and the first sheet metal heat sink 400 are stacked along the alignment direction Z of the bottom 311 and notch 312 of the electrical receiving slot 310. The shielding bracket 500 is used to accommodate multiple magnetic components 110 of the onboard charger 100 in the onboard device 20, allowing the multiple magnetic components 110 of the onboard charger 100 to be supported by the first sheet metal heat sink 400. Compared to using a die-cast housing to integrally form the bracket and flow channel, the combined structure of the first sheet metal heat sink 400 and the shielding bracket 500 is more conducive to reducing the height of the onboard device 20, allowing the onboard device 20 to adapt to the space layout of more rear-wheel drive vehicles.

[0107] In an embodiment of the present application, the inlet 410 of the first sheet metal radiator 400 is used to connect to the outlet 322 of the internal water inlet channel 320. The first sheet metal radiator 400 is used to fix the shielding bracket 500 and to cool the multiple magnetic components 110 accommodated in the shielding bracket 500, so that the cooling water input into the shell 300 of the vehicle-mounted device 20 from the inlet 321 of the internal water inlet channel 320 can be output to the inlet 410 of the first sheet metal radiator 400 through the outlet 322 of the internal water inlet channel 320, thereby entering the first sheet metal radiator 400 to cool the multiple magnetic components 110 accommodated in the shielding bracket 500, which is beneficial to ensure the normal operation of the vehicle-mounted device 20.

[0108] In an embodiment of the present application, a first sheet metal radiator 400 is used to fix the shielding bracket 500 and the internal water inlet channel 320 for connecting to the shell 300. The first sheet metal radiator 400 has a higher thermal conductivity than the flow channel formed by the bottom of the die-cast bracket, which can make the heat dissipation effect of the magnetic device 110 better. In addition, the groove thickness of the flow channel of the first sheet metal radiator 400 formed by the sheet metal process is relatively small, which is conducive to reducing the height of the vehicle-mounted device 20 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, thereby optimizing the layout of the vehicle-mounted device 20 in the entire vehicle.

[0109] in, Figure 9 The magnetic device 110 of the on-board charger 100 in FIG. 1 only represents a schematic position and does not represent a specific structure.

[0110] In one embodiment, if Figure 4 and Figure 9 As shown, the shielding bracket 500 includes a first receiving hole 510, and the first receiving hole 510 passes through the shielding bracket 500 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310. Figure 3 As shown, the first sheet metal heat sink 400 is used to enclose the first receiving hole 510 to form a first receiving groove 510a for receiving the magnetic device 110, and the first sheet metal heat sink 400 is used to form a groove bottom 511a of the first receiving groove 510a.

[0111] In an embodiment of the present application, a first receiving hole 510 passes through the shielding bracket 500 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, and the first sheet metal heat sink 400 is used to enclose the first receiving hole 510 to form a first receiving groove 510a for accommodating the magnetic device 110, so that the magnetic device 110 can be passed through the first receiving hole 510 of the shielding bracket 500, so that the arrangement of the magnetic device 110 fully utilizes the thickness space of the shielding bracket 500 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, which is conducive to reducing the overall height of the vehicle-mounted device 20 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310.

[0112] In the embodiment of the present application, the first sheet metal heat sink 400 is used to form the bottom 511a of the first accommodating groove 510a. The first sheet metal heat sink 400 is reused as the bottom 511a of the first accommodating groove 510a for accommodating the magnetic device 110, so that the magnetic device 110 can be directly fixed to the first sheet metal heat sink 400 and in contact with the first sheet metal heat sink 400, which is beneficial to improving the heat dissipation effect of the magnetic device 110, thereby improving the cooling efficiency of the on-board charger 100.

[0113] In one embodiment, the shielding bracket 500 includes a plurality of first receiving holes 510. The first sheet metal heat sink 400 is used to enclose the plurality of first receiving holes 510 to form a plurality of first receiving slots 510a that respectively accommodate the plurality of magnetic components 110. In one embodiment, the first receiving slots 510a are used to accommodate the AC filter component 110b. In another embodiment, the first receiving slots 510a are used to accommodate PFC capacitors.

[0114] Figure 10 This is another schematic diagram of the first sheet metal heat sink 400 provided in an embodiment of the present application.

[0115] In one embodiment, if Figure 4 and Figure 8 As shown, the first sheet metal heat sink 400 includes a plurality of fixing holes 420, and the plurality of fixing holes 420 penetrate the two side surfaces of the first sheet metal heat sink 400 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310. The plurality of fixing holes 420 are used to accommodate the fixing members 420a for fixing the shielding bracket 500, as shown in FIG. Figure 10 As shown, the fixing member 420 a protrudes outward from the fixing hole 420 on the surface of the first sheet metal heat sink 400 .

[0116] In the embodiment of the present application, multiple fixing holes 420 are formed through both sides of the first sheet metal heat sink 400 along the arrangement direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310. The first sheet metal heat sink 400 is used to secure the shielding bracket 500. Therefore, screws are required to be inserted through the fixing holes 420 to secure the shielding bracket 500 to the first sheet metal heat sink 400. However, the thin wall thickness of the first sheet metal heat sink 400 makes it difficult to process internal threads in the fixing holes 420. Furthermore, the thin wall thickness can also result in insufficient internal thread length, leading to unstable screw fixation. This solution simplifies the thread forming process by accommodating fixing members 420a for securing the shielding bracket 500 within the fixing holes 420 and causing the fixing members 420a to protrude outward from the surface of the first sheet metal heat sink 400 from within the fixing holes 420. Furthermore, the fixing members 420a can extend the contact length between the first sheet metal heat sink 400 and the screws, thereby more securely securing the shielding bracket 500 to the first sheet metal heat sink 400.

[0117] In one embodiment, the fixing member 420a is an internally threaded fixing member.

[0118] In one embodiment, if Figure 3 As shown, the first sheet metal heat sink 400 and the shielding bracket 500 are fixed by forming fixing holes 420 that pass through the two side surfaces of the first sheet metal heat sink 400. The fixing holes 420 can also be used to directly fix the magnetic device 110 or the circuit board 610 of the DC converter 600, simplifying the assembly process. Figure 3The DC converter 600 and the circuit board 610 are only shown to indicate the positions and do not represent the specific structures.

[0119] In one embodiment, if Figure 3 As shown, the electrical receiving groove 310 is also used to accommodate the circuit board 610 and the heat conducting plate 620 of the DC converter 600. The circuit board 610 of the DC converter 600 is directly fixed to the surface of the first sheet metal heat sink 400 facing the notch 312 of the electrical receiving groove 310. The circuit board 610 of the DC converter 600 and the shielding bracket 500 are arranged adjacent to each other along the length direction Y of the first sheet metal heat sink 400, so that the DC converter 600 can be directly cooled by the first sheet metal heat sink 400. Since the fixing part 420a of the first sheet metal heat sink 400 protrudes outward from the surface of the first sheet metal heat sink 400 from the fixing hole 420, there is a gap between the circuit board 610 at the bottom of the DC converter 600 and the first sheet metal heat sink 400 and they cannot directly contact each other, resulting in poor thermal conductivity. Therefore, the heat conducting plate 620 is arranged between the first sheet metal heat sink 400 and the DC converter 600 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, so that the heat of the DC converter 600 can be conducted to the first sheet metal heat sink 400 through the heat conducting plate 620, which can effectively improve the heat dissipation efficiency of the DC converter 600 and help ensure the normal operation of the DC converter 600.

[0120] Figure 11 yes Figure 10 An exploded view of the first sheet metal heat sink 400.

[0121] In one embodiment, if Figure 4 、 Figure 10 and Figure 11 As shown, the first sheet metal heat sink 400 includes a first sheet metal plate 430 and a second sheet metal plate 440. The first sheet metal plate 430 is arranged on the side of the second sheet metal plate 440 facing the bottom 311 of the electrical receiving groove 310. The first sheet metal plate 430 and the second sheet metal plate 440 are used to enclose the internal flow channel 450 of the first sheet metal heat sink 400. Figure 11 As shown, the first sheet metal plate 430 includes a first opening 431. Figure 8 and Figure 11 As shown, a first opening 431 penetrates the first sheet metal plate 430 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310 . The first opening 431 is used to form the inlet 410 of the first sheet metal heat sink 400 .

[0122] In an embodiment of the present application, the first sheet metal heat sink 400 includes a first sheet metal plate 430 and a second sheet metal plate 440, allowing the first sheet metal heat sink 400 to be directly welded together, simplifying the manufacturing process. In one embodiment, the first sheet metal plate 430 and the second sheet metal plate 440 are brazed together. The first sheet metal plate 430 and the second sheet metal plate 440 are used to enclose an internal flow channel 450 of the first sheet metal heat sink 400, allowing cooling water to flow through the internal flow channel 450 of the first sheet metal heat sink 400, thereby enabling the first sheet metal heat sink 400 to cool the multiple magnetic components 110 of the on-board charger 100.

[0123] In the embodiment of the present application, the first sheet metal plate 430 includes a first opening 431 extending through the first sheet metal plate 430 along the alignment direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310. The first opening 431 serves to form the inlet 410 of the first sheet metal heat sink 400. This ensures that the first opening 431 does not occupy additional space on the first sheet metal plate 430 along the alignment direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310. This also ensures that the inlet 410 of the first sheet metal heat sink 400 does not increase the thickness of the first sheet metal plate 430. This facilitates reducing the height of the vehicle-mounted device 20 along the alignment direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310. In one embodiment, the first opening 431 can be formed in the first sheet metal plate 430 by laser cutting, which increases the precision of the formation of the first opening 431.

[0124] In the embodiment of the present application, the first opening 431 is formed along the arrangement direction Z of the bottom 311 and the notch 312 of the electrical receiving slot 310, and penetrates the first sheet metal plate 430. Compared with the die-cast housing, which requires the die-casting process to form a protruding water nozzle as the flow channel inlet, the processing technology of forming the first opening 431 on the first sheet metal plate 430 is simpler, and the thickness is smaller, and less material is used, which is conducive to saving production costs. Figure 4 and Figure 8 As shown, the first opening 431 is used to form the inlet 410 of the first sheet metal radiator 400, and also enables the first opening 431 to receive cooling water output from the outlet 322 of the internal water inlet channel 320 and input the cooling water into the internal flow channel 450 of the first sheet metal radiator 400.

[0125] In one embodiment, if Figure 7 As shown, the bottom 311 of the electrical receiving tank 310 includes a sealing groove 3111, and the sealing groove 3111 surrounds the outer periphery of the outlet 322 of the internal water inlet channel 320, as shown in FIG. Figure 7 and Figure 11As shown, the aperture of the first opening 431 is smaller than the aperture of the outlet 322 of the internal water inlet channel 320 , and a portion of the first sheet metal plate 430 at the edge of the first opening 431 is stacked on the sealing ring 3112 in the sealing groove 3111 .

[0126] In the embodiments of this application, Figure 4 、 Figure 7 and Figure 11 As shown, the sealing groove 3111 surrounds the outer periphery of the outlet 322 of the internal water inlet channel 320, the aperture of the first opening 431 is smaller than the aperture of the outlet 322 of the internal water inlet channel 320, and the first sheet metal plate 430 at the edge of the first opening 431 is stacked on the sealing ring 3112 in the sealing groove 3111, so that the first opening 431 of the first sheet metal plate 430 can be sealed with the outlet 322 of the internal water inlet channel 320 through the sealing ring 3112 in the sealing groove 3111, preventing the cooling water transported from the outlet 322 of the internal water inlet channel 320 from leaking in the electrical receiving groove 310, which is conducive to ensuring the normal operation of the multiple magnetic components 110 of the on-board charger 100 in the electrical receiving groove 310.

[0127] In one embodiment, if Figure 8 and Figure 11 As shown, the first sheet metal plate 430 is recessed away from the second sheet metal plate 440 to form a flow channel 432, and the groove bottom 432a of the flow channel 432 protrudes from the surface of the first sheet metal plate 430 away from the second sheet metal plate 440. The flow channel 432 is used to enclose the second sheet metal plate 440 to form an internal flow channel 450 of the first sheet metal radiator 400.

[0128] In an embodiment of the present application, the first sheet metal plate 430 is recessed away from the second sheet metal plate 440 to form a flow channel groove 432, and the groove bottom 432a of the flow channel groove 432 protrudes from the surface of the first sheet metal plate 430 away from the second sheet metal plate 440, so that the groove wall thickness of the flow channel groove 432 formed by the first sheet metal plate 430 remains basically the same as the thickness at other positions of the first sheet metal plate 430. The flow channel groove 432 is used to enclose the second sheet metal plate 440 to form the internal flow channel 450 of the first sheet metal radiator 400, which is beneficial for the first sheet metal radiator 400 with the internal flow channel 450 formed along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310 to remain relatively small, thereby facilitating the vehicle-mounted device 20 to have a smaller height and facilitating the layout of the vehicle-mounted device 20 in the entire vehicle.

[0129] In one embodiment, if Figure 3 and Figure 11As shown, the first sheet metal heat sink 400 further includes a spoiler structure 460, which is distributed within the flow channel groove 432. The spoiler structure 460 can stir the cooling water within the first sheet metal heat sink 400, which helps improve the heat dissipation efficiency of the first sheet metal heat sink 400 to the magnetic device 110 of the on-board charger 100.

[0130] In one embodiment, if Figure 11 As shown, the second sheet metal plate 440 is planar.

[0131] In the embodiments of this application, Figure 4 and Figure 11 As shown, the second sheet metal plate 440 is planar, resulting in a smooth surface, which facilitates the regular arrangement of the shielding bracket 500 and the multiple magnetic components 110 of the onboard charger 100 above the first sheet metal heat sink 400. The planarity of the second sheet metal plate 440 also ensures a uniform thickness and a relatively low height along the alignment direction Z of the bottom 311 and the notch 312 of the electrical receiving slot 310. This helps reduce the height of the first sheet metal heat sink 400 formed by the second sheet metal plate 440, thereby reducing the height of the onboard device 20 and facilitating its placement within the vehicle.

[0132] In one embodiment, if Figure 10 and Figure 11 As shown, the second sheet metal plate 440 includes a second receiving hole 441. The second receiving hole 441 passes through the second sheet metal plate 440 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310. The edge of the second receiving hole 441 is welded to the first sheet metal plate 430. The second receiving hole 441 is used to enclose the first sheet metal plate 430 to form a second receiving groove 441a. Figure 3 As shown, the second receiving groove 441 a is used to receive part of the magnetic component 110 .

[0133] In an embodiment of the present application, the second receiving hole 441 passes through the second sheet metal plate 440 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, and the edge of the second receiving hole 441 is welded to the first sheet metal plate 430, so that the cooling water in the internal flow channel 450 of the first sheet metal heat sink 400 will not leak from the second receiving hole 441, so that the magnetic device 110 can operate normally.

[0134] In the embodiment of the present application, the second receiving hole 441 is used to enclose the first sheet metal plate 430 to form a second receiving groove 441a. The second receiving groove 441a is used to accommodate a portion of the magnetic component 110. This allows the arrangement of the portion of the magnetic component 110 to utilize the thickness of the second sheet metal plate 440 along the alignment direction Z of the groove bottom 311 and the notch 312 of the electrical receiving groove 310. This helps to reduce the overall height of the first sheet metal heat sink 400 and the portion of the magnetic component 110 of the on-board charger 100 along the alignment direction Z of the groove bottom 311 and the notch 312 of the electrical receiving groove 310, thereby reducing the height of the on-board device 20. The edge of the second receiving hole 441 is welded to the first sheet metal plate 430. The second receiving groove 441a is used to accommodate the portion of the magnetic component 110. This also helps to allow the cooling water in the internal flow channel 450 of the first sheet metal heat sink 400 to flow around the portion of the magnetic component 110, thereby improving the heat dissipation efficiency of the portion of the magnetic component 110.

[0135] In one embodiment, if Figure 10 and Figure 11 As shown, the first sheet metal radiator 400 is formed by brazing the first sheet metal plate 430 and the second sheet metal plate 440. Compared with the existing die-cast shell formed by the groove plus cover plate method, the first sheet metal radiator 400 does not require additional seals, which can make the first sheet metal radiator 400 thinner and the processing technology simpler.

[0136] In one embodiment, if Figure 3 and Figure 11 As shown, the thickness of the first sheet metal plate 430 is greater than or equal to 1.5 mm and less than or equal to 3 mm. In one embodiment, the thickness of the second sheet metal plate 440 is greater than or equal to 1.5 mm and less than or equal to 3 mm. This reduces the overall thickness of the first sheet metal heat sink 400, facilitating a reduction in the height of the on-board device 20. It also allows the cooling water in the internal flow channel 450 of the first sheet metal heat sink 400 to better absorb heat from the magnetic device 110 of the on-board charger 100, improving the cooling efficiency of the on-board device 20.

[0137] Figure 12 Schematic diagram of a first sheet metal radiator 400, a first connecting water nozzle 800, and a second sheet metal radiator 700 provided in an embodiment of the present application. Figure 13 yes Figure 12 An exploded view of the first sheet metal radiator 400, the first connecting water nozzle 800 and the second sheet metal radiator 700.

[0138] In one embodiment, if Figure 3 、 Figure 4 and Figure 12 As shown, the electrical receiving slot 310 is also used to accommodate the second sheet metal radiator 700 and the first connecting water nozzle 800, as shown in FIG. Figures 11 to 13 As shown, the first sheet metal heat sink 400 includes a second opening 470 that communicates with its internal flow channel 450. Along the alignment direction Z between the bottom 311 of the electrical receiving slot 310 and the notch 312, the opening of the second opening 470 faces the notch 312 of the electrical receiving slot 310. A first connecting nozzle 800 connects the second opening 470 with the internal flow channel 710 of the second sheet metal heat sink 700. A portion of the surface of the first sheet metal heat sink 400 surrounding the second opening 470 is welded to the first connecting nozzle 800, which is stacked between the first sheet metal heat sink 400 and the second sheet metal heat sink 700.

[0139] In an embodiment of the present application, the first sheet metal heat sink 400 includes a second opening 470 connected to its internal flow channel 450. The opening of the second opening 470 is oriented toward the notch 312 of the electrical receiving groove 310 along the arrangement direction Z of the groove bottom 311 and the notch 312 of the electrical receiving groove 310, so as to facilitate the second opening 470 to be connected with the first connecting water nozzle 800 in the electrical receiving groove 310. The first connecting water nozzle 800 is used to connect the second opening 470 and the internal flow channel 710 of the second sheet metal heat sink 700, so that the second opening 470 can transport the cooling water in the internal flow channel 450 of the first sheet metal heat sink 400 to the internal flow channel 710 of the second sheet metal heat sink 700 through the first connecting water nozzle 800. The second sheet metal heat sink 700 is arranged in the electrical receiving groove 310, so that the second sheet metal heat sink 700 can cool the magnetic device 110 in the electrical receiving groove 310.

[0140] In an embodiment of the present application, part of the surface of the first sheet metal radiator 400 around the second opening 470 is used for welding the first connecting water nozzle 800, which simplifies the installation and fixing process of the first connecting water nozzle 800 and is also beneficial for preventing cooling water from leaking from the connection when the second opening 470 transports cooling water to the first connecting water nozzle 800.

[0141] In an embodiment of the present application, the first connecting water nozzle 800 is stacked between the first sheet metal radiator 400 and the second sheet metal radiator 700, so that the first sheet metal radiator 400 and the second sheet metal radiator 700 can be connected through the first connecting water nozzle 800 and stacked at intervals in the electrical receiving groove 310, so that cooling water can flow in parallel and series in the first sheet metal radiator 400 and the second sheet metal radiator 700, so that the magnetic device 110 in the electrical receiving groove 310 can be cooled by the first sheet metal radiator 400 and the second sheet metal radiator 700 at the same time, resulting in better heat dissipation effect, which is beneficial to improving the cooling efficiency of the vehicle-mounted device 20.

[0142] In one embodiment, if Figure 11 and Figure 13As shown, the second opening 470 includes two openings 471 and 472. One opening 471 is used to communicate with the inlet 720 of the second sheet metal radiator 700, and the other opening 472 is used to communicate with the outlet 730 of the second sheet metal radiator 700. This allows cooling water in the internal flow channel 450 of the first sheet metal radiator 400 to flow from the one opening 471 and the inlet 720 of the second sheet metal radiator 700 into the internal flow channel 710 of the second sheet metal radiator 700. After flowing through the internal flow channel 710 of the second sheet metal radiator 700, the cooling water flows out from the outlet 730 of the second sheet metal radiator 700 and the other opening 472 back into the internal flow channel 450 of the first sheet metal radiator 400. This achieves parallel flow of cooling water in the first sheet metal radiator 400 and the second sheet metal radiator 700, which helps improve the cooling efficiency of the vehicle-mounted device 20.

[0143] In one embodiment, if Figure 3 、 Figure 4 、 Figures 11 to 13 As shown, the electrical receiving slot 310 is also used to accommodate the water-cooling radiator 210 of the motor controller 200. The second sheet metal plate 440 also includes a third opening 442, which forms the outlet 480 of the first sheet metal radiator 400 and communicates with the internal flow channel 450 of the first sheet metal radiator 400. The third opening 442 penetrates the second sheet metal plate 440 along the arrangement direction Z of the slot bottom 311 and the slot opening 312 of the electrical receiving slot 310. The second sheet metal plate 440 is also welded with a second connecting nozzle 442a, which is stacked on the second sheet metal plate 440 and connects the third opening 442 with the inlet of the water-cooling radiator 210. This allows cooling water in the internal flow channel 450 of the first sheet metal radiator 400 to be fed into the water-cooling radiator 210 through the third opening 442, thereby dissipating heat from the busbar capacitor and power module of the motor controller 200.

[0144] in, Figure 3 The water-cooling radiator shown in the figure only represents the schematic location and does not indicate the specific structure.

[0145] In one embodiment, if Figure 3 and Figure 7 As shown, the shell 300 of the vehicle-mounted device 20 also includes an internal water outlet channel 330, which is used to connect to the outlet of the water-cooled radiator 210, so that the cooling water in the water-cooled radiator 210 can flow out of the shell 300 of the vehicle-mounted device 20 from the internal water outlet channel 330.

[0146] In one embodiment, if Figure 3 、 Figure 7 、 Figure 8 、 Figures 11 to 13As shown, cooling water from the vehicle cooling system is transported from the internal water inlet channel 320 of the shell 300 of the vehicle-mounted device 20 to the inlet 410 of the first sheet metal radiator 400, wherein a portion of the cooling water flows directly in the internal flow channel 450 of the first sheet metal radiator 400, and is directly output from the outlet 480 of the first sheet metal radiator 400 and the second connecting water nozzle 442a to the inlet of the water-cooled radiator 210, and finally is output from the outlet of the water-cooled radiator 210 to the internal water outlet channel 330 and flows out of the electrical accommodation tank 310. Another part of the cooling water flows from the internal flow channel 450 of the first sheet metal radiator 400 through an opening 471 of the first connecting water nozzle 800, flows into the inlet 720 of the second sheet metal radiator 700, flows through the internal flow channel 710 of the second sheet metal radiator 700, and then flows out from the outlet 730 of the second sheet metal radiator 700 to another opening 472, thereby flowing back into the internal flow channel 450 of the first sheet metal radiator 400 and merging with the cooling water in the internal flow channel 450 of the first sheet metal radiator 400, and finally output from the outlet 480 of the first sheet metal radiator 400 to the water-cooled radiator 210, and finally output from the internal water outlet channel 330 to the electrical accommodation tank 310. The cooperation of the first sheet metal radiator 400, the first connecting nozzle 800, the second connecting nozzle 442a, the second sheet metal radiator 700 and the water cooling radiator 210 allows the cooling water to flow in parallel and in series in the electrical receiving tank 310, so that the on-board charger 100 and the motor controller 200 in the electrical receiving tank 310 are cooled more fully, which is beneficial to improving the cooling efficiency of the on-board device 20. Figure 11 and Figure 13 The arrow in the middle indicates the flow direction of cooling water.

[0147] In one embodiment, if Figure 3 and Figure 4 As shown, the electrical receiving slot 310 is also used to accommodate a circuit board 900 carrying a plurality of magnetic components 110, and the second sheet metal heat sink 700 is stacked between the circuit board 900 and the shielding bracket 500. Figure 4 and Figure 9 As shown, the shielding bracket 500 includes an avoidance hole 520 , which penetrates the shielding bracket 500 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310 , and is used to pass through the first connecting water nozzle 800 .

[0148] In an embodiment of the present application, the second sheet metal radiator 700 is stacked between the circuit board 900 and the shielding bracket 500, so that the second sheet metal radiator 700 can be arranged using the space between the circuit board 900 and the shielding bracket 500, so that the second sheet metal radiator 700 does not occupy too much space in the height direction of the vehicle-mounted device 20, which is conducive to making the volume of the vehicle-mounted device 20 in the height direction smaller.

[0149] In an embodiment of the present application, the shielding bracket 500 is arranged between the first sheet metal radiator 400 and the second sheet metal radiator 700. The shielding bracket 500 includes an avoidance hole 520. The avoidance hole 520 passes through the shielding bracket 500 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical accommodating groove 310, thereby facilitating the arrangement of the first connecting water nozzle 800 connecting the first sheet metal radiator 400 and the second sheet metal radiator 700 through the avoidance hole 520 of the shielding bracket 500.

[0150] in, Figure 3 The avoidance hole 520 in FIG. 1 only shows the schematic position of the avoidance hole 520 . For the specific structure, see FIG. Figure 9 .

[0151] Figure 14 yes Figure 9 A cross-sectional view of the shielding bracket 500 in FIG. Figure 15 This is another schematic diagram of the vehicle-mounted device 20 provided in an embodiment of the present application.

[0152] In one embodiment, if Figure 3 、 Figure 9 、 Figure 14 and Figure 15 As shown, the shielding bracket 500 further includes a first groove 530 for accommodating the plurality of magnetic components 110. The depth of the first groove 530 along the arrangement direction Z between the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310 is greater than the depth of the avoidance hole 520. At least a portion of the second sheet metal heat sink 700 is stacked between the circuit board 900 and the wall of the avoidance hole 520.

[0153] In an embodiment of the present application, the shielding bracket 500 also includes a first groove 530 for accommodating multiple magnetic devices 110. The first groove 530 can serve as a shielding wall to electrically isolate the magnetic device 110 in the first groove 530 from other magnetic devices 110, so that the on-board charger 100 can operate normally. The first groove 530 can also provide support for the magnetic device 110, thereby improving the reliability of the on-board device 20.

[0154] In the embodiments of this application, Figure 14As shown, along the alignment direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310, the depth of the first recess 530 is denoted as L1, and the depth of the avoidance hole 520 is denoted as L2, where L1>L2. At least a portion of the second sheet metal heat sink 700 is stacked between the circuit board 900 and the wall of the avoidance hole 520, allowing the second sheet metal heat sink 700 to fully utilize the portion of the wall space of the first recess 530 that is higher than the avoidance hole 520. This ensures that the second sheet metal heat sink 700 does not excessively occupy space on the shielding bracket 500 outside of the alignment direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310, thereby reducing the height of the vehicle-mounted device 20. Compared to stacking the second sheet metal heat sink 700 above the circuit board 900 in the alignment direction Z between the bottom 311 and the notch 312 of the electrical receiving slot 310, the height of the vehicle-mounted device 20 can be effectively reduced.

[0155] In one embodiment, if Figure 14 and Figure 15 As shown, the difference between the groove depth of the first groove 530 and the hole depth of the avoidance hole 520 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310 is greater than the thickness of the second sheet metal heat sink 700 .

[0156] In an embodiment of the present application, the difference between the groove depth of the first groove 530 and the hole depth of the avoidance hole 520 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310 is greater than the thickness of the second sheet metal radiator 700, so that the second sheet metal radiator 700 can be completely arranged between the height difference between the first groove 530 and the avoidance hole 520 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, so that the arrangement between the second sheet metal radiator 700, the circuit board 900 and the shielding bracket 500 is more compact, and the second sheet metal radiator 700 will not occupy additional space outside the shielding bracket 500 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, which is beneficial to reducing the height of the vehicle-mounted device 20.

[0157] In one embodiment, if Figure 9 and Figure 14 As shown, the shielding bracket 500 further includes a second groove 540 for accommodating the transformer 110a of the on-board charger 100, and the first groove 530 is used to accommodate the AC filter device 110b. The first groove 530, the avoidance hole 520 and the second groove 540 are arranged in sequence, and the groove depth of the second groove 540 is less than the groove depth of the first groove 530. Figure 3 and Figure 4 As shown, part of the second sheet metal heat sink 700 is also stacked between the circuit board 900 and the second groove 540 .

[0158] In the embodiments of this application, Figure 4 、 Figure 9and Figure 14 As shown, the shielding bracket 500 also includes a second groove 540 for accommodating the transformer 110a of the on-board charger 100, a first groove 530 for accommodating the AC filter device 110b, and a bypass hole 520 for passing the first connecting water nozzle 800. The first groove 530, bypass hole 520, and second groove 540 are arranged in sequence, so that the AC filter device 110b, the first connecting water nozzle 800, and the transformer 110a of the on-board charger 100 are arranged in sequence. The first groove 530 and the second groove 540 can also serve as a shielding wall, which can reduce electrical interference between the AC filter device 110a and the transformer 110a of the on-board charger 100, allowing the AC filter device 110b and the transformer 110a of the on-board charger 100 to operate relatively independently, which is beneficial for ensuring the normal operation of the on-board device 20.

[0159] In the embodiments of this application, Figure 14 As shown, the groove depth of the second groove 540 is recorded as L3, the groove depth of the first groove 530 is L1, L3<L1, and part of the second sheet metal heat sink 700 is also stacked between the circuit board 900 and the second groove 540, so that the second sheet metal heat sink 700 can make full use of the part of the groove wall space of the first groove 530 that is higher than the second groove 540 for arrangement, so that the arrangement of the second sheet metal heat sink 700 will not occupy too much space outside the arrangement direction Z of the shielding bracket 500 along the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310, which is conducive to making the height of the vehicle-mounted device 20 smaller.

[0160] In the embodiment of the present application, part of the second sheet metal heat sink 700 is also stacked between the circuit board 900 and the second groove 540, so that the second sheet metal heat sink 700 can simultaneously cool the transformer 110a of the on-board charger 100 in the circuit board 900 and the second groove 540, which is beneficial to improving the heat dissipation efficiency of the on-board device 20.

[0161] in, Figure 9 The on-board charger 100, transformer 110a, and AC filter device 110b are only schematic locations and do not represent specific structures.

[0162] In one embodiment, if Figure 9 As shown, the AC filter device 110b in the first groove 530 includes multiple inductors and multiple capacitors, and the transformer 110a of the on-board charger 100 in the second groove 540 includes a DCDC transformer 112 and an LLC transformer 113. In one embodiment, the second groove 540 is also used to accommodate the PFC inductor 111.

[0163] in, Figure 9The PFC inductor 111 , DCDC transformer 112 and LLC transformer 113 in the figure only show schematic locations and do not represent specific structures.

[0164] In one embodiment, if Figure 3 and Figure 9 As shown, the shielding bracket 500 also includes a third receiving hole 550, which extends through the wall of the first groove 530. The third receiving hole 550 is used to pass through the AC filter connector 350a, so that the AC filter connector 350a can directly electrically connect the external AC power supply to the AC filter device 110b, which is beneficial for the external input AC power to be filtered by the AC filter device 110b and then input to the multiple magnetic devices 110 of the on-board charger 100.

[0165] In one embodiment, if Figure 3 、 Figure 7 and Figure 9 As shown, the housing 300 of the vehicle-mounted device 20 includes a first mounting hole 340, a second mounting hole 350, a third mounting hole 360 ​​and a fourth mounting hole 370. The first mounting hole 340, the second mounting hole 350, the third mounting hole 360 ​​and the fourth mounting hole 370 pass through the wall of the electrical receiving slot 310. The first mounting hole 340 is used to install a DC connector 340a, and the DC connector 340a is used to electrically connect the power battery 10 and the bus capacitor. The second mounting hole 350 is aligned with the third receiving hole 550 along the length direction Y of the first sheet metal radiator 400, and the second mounting hole 350 is aligned with the third receiving hole 550 along the length direction Y of the first sheet metal radiator 400. The mounting hole 350 and the third receiving hole 550 are used to mount an AC filter connector 350a, which is used to electrically connect an external AC power source and the AC filter component 110b. The third mounting hole 360 ​​is used to mount a low-voltage load connector 360a, allowing the on-board charger 100 to supply low-voltage current to a low-voltage load through the low-voltage load connector 360a. The fourth mounting hole 370 is used to mount a power connector 370a, which is used to electrically connect to a heater, allowing the on-board charger 100 to supply current to the heater. The second mounting hole 350 and the third mounting hole 360 ​​are arranged opposite each other along the length direction Y of the first sheet metal heat sink 400. The first mounting hole 340, the third mounting hole 360, and the fourth mounting hole 370 are spaced apart along the width direction X of the first sheet metal heat sink 400, ensuring a regular arrangement of the connectors on the housing 300 of the on-board device 20.

[0166] in, Figure 9 The DC connector 340a, AC filter connector 350a, low voltage load connector 360a and power supply connector 370a installed in the middle only represent schematic locations and do not represent specific structures.

[0167] In one embodiment, if Figure 3 and Figure 4As shown, the surface of the circuit board 900 facing the second sheet metal heat sink 700 is used to support multiple power tubes 110c of the on-board charger 100. The multiple power tubes 110c are stacked on the second sheet metal heat sink 700 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical receiving groove 310.

[0168] In the embodiment of the present application, the surface of the circuit board 900 facing the second sheet metal heat sink 700 is used to support multiple power tubes 110c of the on-board charger 100. The multiple power tubes 110c are stacked on the second sheet metal heat sink 700 along the arrangement direction Z of the groove bottom 311 and the groove opening 312 of the electrical accommodating groove 310, so that the multiple power tubes 110c are closer to the second sheet metal heat sink 700, which is beneficial for the second sheet metal heat sink 700 to dissipate heat for the multiple power tubes 110c and improve the cooling effect of the power tubes 110c.

[0169] In one embodiment, if Figure 4 and Figure 13 As shown, the internal flow channel 710 of the second sheet metal heat sink 700 includes multiple spoiler structures 740, which is beneficial to improving the heat dissipation effect of the second sheet metal heat sink 700 on the power tube 110c and the transformer 110a of the on-board charger 100.

[0170] In one embodiment, if Figure 5 and Figure 6 As shown, the housing 300 of the vehicle-mounted device 20 also includes a motor slot 380 and a reducer slot 390. The slots of the motor slot 380 and the reducer slot 390 are opposite to each other. The motor slot 380 is used to accommodate the motor stator and motor rotor of the drive motor 22, and the reducer slot 390 is used to accommodate the gear assembly of the reducer 23. The electrical accommodation slot 310 is stacked on the motor slot 380 and the reducer slot 390.

[0171] In the embodiment of the present application, the electrical containment slot 310, motor slot 380, and reducer slot 390 are integrally die-cast, enhancing the structural strength of the housing 300 of the vehicle-mounted device 20. The electrical containment slot 310 is stacked above the motor slot 380 and reducer slot 390. The arrangement of the first sheet metal heat sink 400, shielding bracket 500, and second sheet metal heat sink 700 within the electrical containment slot 310 reduces the overall height of the vehicle-mounted device 20, facilitating its placement within the vehicle.

[0172] The above is a detailed introduction to the vehicle-mounted device and electric vehicle provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, based on the ideas of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A vehicle-mounted device, characterized in that: The housing of the vehicle-mounted device includes an electrical receiving slot and an internal water inlet channel, wherein the inlet of the internal water inlet channel is located outside the electrical receiving slot, and the outlet of the internal water inlet channel is located inside the electrical receiving slot, wherein: The electrical receiving groove is used to accommodate a first sheet metal radiator and a shielding bracket. The shielding bracket, the first sheet metal radiator and the bottom of the electrical receiving groove are stacked in sequence along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove. The shielding bracket is used to accommodate multiple magnetic components of the on-board charger in the on-board device. The inlet of the first sheet metal radiator is used to connect to the outlet of the internal water inlet channel. The first sheet metal radiator is used to fix the shielding bracket and to cool the multiple magnetic components accommodated by the shielding bracket.

2. The vehicle-mounted device according to claim 1, wherein: The shielding bracket includes a first receiving hole, which passes through the shielding bracket along the arrangement direction of the bottom and the slot of the electrical receiving slot. The first sheet metal heat sink is used to enclose the first receiving hole to form a first receiving slot for accommodating the magnetic device. The first sheet metal heat sink is used to form the bottom of the first receiving slot.

3. The vehicle-mounted device according to claim 1 or 2, characterized in that: The first sheet metal heat sink includes a plurality of fixing holes, and the plurality of fixing holes pass through the two side surfaces of the first sheet metal heat sink along the arrangement direction of the bottom and the slot of the electrical receiving slot. The plurality of fixing holes are used to accommodate fixing parts for fixing the shielding bracket, and the fixing parts protrude outward from the fixing holes on the surface of the first sheet metal heat sink.

4. The vehicle-mounted device according to any one of claims 1 to 3, characterized in that: The first sheet metal heat sink includes a first sheet metal plate and a second sheet metal plate, wherein the first sheet metal plate is arranged on a side of the second sheet metal plate facing the bottom of the electrical receiving slot, and the first sheet metal plate and the second sheet metal plate are used to enclose an internal flow channel of the first sheet metal heat sink, wherein: The first sheet metal plate includes a first opening, which passes through the first sheet metal plate along the arrangement direction of the groove bottom and the groove opening of the electrical receiving groove. The first opening is used to form an inlet of the first sheet metal radiator.

5. The vehicle-mounted device according to claim 4, wherein: The bottom of the electrical containment slot includes a sealing slot, which surrounds the outer periphery of the outlet of the internal water inlet channel. The aperture of the first opening is smaller than the aperture of the outlet of the internal water inlet channel. Part of the edge of the first opening and the first sheet metal plate are stacked on the sealing ring in the sealing slot.

6. The vehicle-mounted device according to claim 4, wherein: The first sheet metal plate is recessed away from the second sheet metal plate to form a flow channel groove, the bottom of the flow channel groove protrudes from the surface of the first sheet metal plate away from the second sheet metal plate, and the flow channel groove is used to enclose the second sheet metal plate to form an internal flow channel of the first sheet metal radiator.

7. The vehicle-mounted device according to claim 4, wherein: The second sheet metal plate is planar.

8. The vehicle-mounted device according to claim 4, wherein: The second sheet metal plate includes a second receiving hole, which passes through the second sheet metal plate along the arrangement direction of the bottom and the slot of the electrical receiving slot. The edge of the second receiving hole is welded to the first sheet metal plate. The second receiving hole is used to enclose the first sheet metal plate to form a second receiving slot, and the second receiving slot is used to accommodate part of the magnetic device.

9. The vehicle-mounted device according to any one of claims 1 to 8, characterized in that: The electrical receiving slot is further used to accommodate a second sheet metal radiator and a first connecting water nozzle. The first sheet metal radiator includes a second opening connected to its internal flow channel. The opening of the second opening faces the notch of the electrical receiving slot along the arrangement direction of the slot bottom and the notch of the electrical receiving slot. The first connecting water nozzle is used to connect the second opening and the internal flow channel of the second sheet metal radiator, wherein: A portion of the surface of the first sheet metal radiator around the second opening is used for welding the first connecting water nozzle, and the first connecting water nozzle is stacked between the first sheet metal radiator and the second sheet metal radiator.

10. The vehicle-mounted device according to claim 9, wherein: The electrical receiving slot is further used to receive a circuit board carrying the plurality of magnetic components, and the second sheet metal heat sink is stacked between the circuit board and the shielding bracket, wherein: The shielding bracket includes an avoidance hole, which passes through the shielding bracket along the arrangement direction of the groove bottom and the groove opening of the electrical accommodation groove, and the avoidance hole is used to pass through the first connecting water nozzle.

11. The vehicle-mounted device according to claim 10, wherein: The shielding support further includes a first groove for accommodating a plurality of the magnetic components, wherein: Along the arrangement direction of the bottom and the notch of the electrical receiving groove, the groove depth of the first groove is greater than the hole depth of the avoidance hole, and at least part of the second sheet metal heat sink is stacked between the circuit board and the hole wall of the avoidance hole.

12. The vehicle-mounted device according to claim 11, wherein: The difference between the groove depth of the first groove and the hole depth of the avoidance hole along the arrangement direction of the groove bottom and the groove opening of the electrical accommodation groove is greater than the thickness of the second sheet metal radiator.

13. The vehicle-mounted device according to claim 11, wherein: The shielding bracket also includes a second groove for accommodating the transformer of the on-board charger, the first groove is used to accommodate the AC filter component, the first groove, the avoidance hole and the second groove are arranged in sequence, the groove depth of the second groove is smaller than the groove depth of the first groove, and part of the second sheet metal heat sink is also stacked between the circuit board and the second groove.

14. The vehicle-mounted device according to any one of claims 10 to 13, characterized in that: The surface of the circuit board facing the second sheet metal radiator is used to carry multiple power tubes of the on-board charger, and the multiple power tubes are stacked on the second sheet metal radiator along the arrangement direction of the bottom and the notch of the electrical receiving groove.

15. An electric vehicle, characterized in that: The electric vehicle includes a power battery and the vehicle-mounted device according to any one of claims 1 to 14, and the vehicle-mounted device is used to receive power from an external power source to charge the power battery.

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